From 676f8522a62f8755d65a09aabe7b0541cdb58c2c Mon Sep 17 00:00:00 2001
From: austaras <austaras@outlook.com>
Date: Thu, 10 Nov 2022 22:58:55 +0800
Subject: [PATCH] chore(es/utils): More uniqure name for alias

---
 .../codegen/comment-1/es5/output/index.tsx    |   2 +-
 .../issues-1xxx/1107/1/output/index.js        |   4 +-
 .../issues-1xxx/1333/case2/output/index.js    |   8 +-
 .../issues-1xxx/1333/case3/output/index.js    |   8 +-
 .../issues-1xxx/1449/case1/output/index.js    |   4 +-
 .../issues-1xxx/1477/case1/output/index.js    |   4 +-
 .../pr-1524/comment-1/output/index.tsx        |   2 +-
 .../fixture/issues-2xxx/2063/output/index.js  |   4 +-
 .../fixture/issues-2xxx/2139/output/index.tsx |   6 +-
 .../issues-2xxx/2232/case1/output/index.js    |   4 +-
 .../issues-2xxx/2232/case2/output/index.ts    |   4 +-
 .../fixture/issues-2xxx/2336/output/input.tsx |   8 +-
 .../issues-2xxx/2854/1/output/index.js        |   2 +-
 .../issues-2xxx/2858/1/output/index.js        |   8 +-
 .../issues-2xxx/2858/2/output/index.js        |   8 +-
 .../issues-4xxx/4108/1/output/index.ts        |   8 +-
 .../fixture/issues-5xxx/5102/output/index.js  |  22 +-
 .../shared/lib/router/1/output/index.ts       |  14 +-
 .../tests/fixture/shopify/002/output/index.js |   2 +-
 .../fixture/shopify/003-env/output/index.js   |   2 +-
 .../fixture/shopify/004-jest/output/index.js  |   2 +-
 .../shopify/005-no-module/output/index.js     |   2 +-
 .../tsc-references/ES5For-of26.1.normal.js    |   2 +-
 .../tsc-references/ES5For-of26.2.minified.js  |   4 +-
 .../tsc-references/ES5For-of27.1.normal.js    |   2 +-
 .../tsc-references/ES5For-of27.2.minified.js  |   4 +-
 .../tsc-references/ES5For-of28.1.normal.js    |   2 +-
 .../tsc-references/ES5For-of28.2.minified.js  |   4 +-
 .../tsc-references/ES5For-of29.1.normal.js    |   2 +-
 .../tsc-references/ES5For-of29.2.minified.js  |   4 +-
 .../tsc-references/ES5For-of35.1.normal.js    |   2 +-
 .../tsc-references/ES5For-of35.2.minified.js  |   4 +-
 .../tsc-references/ES5For-of36.1.normal.js    |   2 +-
 .../tsc-references/ES5For-of36.2.minified.js  |   4 +-
 ...mentExpressionContextualTyping.1.normal.js |   6 +-
 ...ntExpressionContextualTyping.2.minified.js |   4 +-
 .../arrayLiterals2ES5.1.normal.js             |   4 +-
 .../arrayLiterals2ES5.2.minified.js           |   4 +-
 .../tsc-references/arrayLiterals3.1.normal.js |   4 +-
 .../arrayLiterals3.2.minified.js              |   4 +-
 .../arrowFunctionExpressions.1.normal.js      |   8 +-
 .../tsc-references/callChain.1.normal.js      |  30 +--
 .../tsc-references/callChain.2.1.normal.js    |   4 +-
 .../tsc-references/callChain.2.2.minified.js  |   4 +-
 .../tsc-references/callChain.2.minified.js    |  16 +-
 .../tsc-references/callChain.3.1.normal.js    |  12 +-
 .../tsc-references/callChain.3.2.minified.js  |  12 +-
 ...lChainWithSuper(target=es2015).1.normal.js |   8 +-
 ...lChainWithSuper(target=es2016).1.normal.js |   8 +-
 ...lChainWithSuper(target=es2017).1.normal.js |   8 +-
 ...lChainWithSuper(target=es2018).1.normal.js |   8 +-
 ...lChainWithSuper(target=es2019).1.normal.js |   8 +-
 ...callChainWithSuper(target=es5).1.normal.js |   8 +-
 .../tsc-references/callWithSpread.1.normal.js |  28 +--
 .../callWithSpread.2.minified.js              |  24 +-
 ...checkJsxChildrenCanBeTupleType.1.normal.js |   4 +-
 ...xSubtleSkipContextSensitiveBug.1.normal.js |   4 +-
 .../circularImportAlias.1.normal.js           |   4 +-
 .../circularImportAlias.2.minified.js         |   4 +-
 .../classExtendingClassLikeType.1.normal.js   |  20 +-
 .../classExtendingNonConstructor.1.normal.js  |   4 +-
 .../classExtendsItselfIndirectly2.1.normal.js |  16 +-
 ...lassExtendsItselfIndirectly2.2.minified.js |  16 +-
 .../computedPropertyNames24_ES5.1.normal.js   |   4 +-
 .../computedPropertyNames24_ES6.1.normal.js   |   4 +-
 .../computedPropertyNames26_ES5.1.normal.js   |   4 +-
 .../computedPropertyNames26_ES6.1.normal.js   |   4 +-
 .../computedPropertyNames27_ES5.1.normal.js   |   4 +-
 .../computedPropertyNames27_ES6.1.normal.js   |   4 +-
 ...xtuallyTypedBindingInitializer.1.normal.js |  18 +-
 ...ypedBindingInitializerNegative.1.normal.js |  10 +-
 .../contextuallyTypedIife.1.normal.js         |  10 +-
 .../contextuallyTypedIife.2.minified.js       |   8 +-
 .../contextuallyTypedIifeStrict.1.normal.js   |  10 +-
 .../contextuallyTypedIifeStrict.2.minified.js |   8 +-
 ...olFlowDestructuringDeclaration.1.normal.js |  18 +-
 .../controlFlowOptionalChain.1.normal.js      |  48 ++--
 .../controlFlowOptionalChain.2.minified.js    |   4 +-
 .../declarationsAndAssignments.1.normal.js    |  80 +++----
 .../declarationsAndAssignments.2.minified.js  |   4 +-
 .../defineProperty(target=es5).1.normal.js    |   4 +-
 .../tsc-references/deleteChain.1.normal.js    |  20 +-
 .../tsc-references/deleteChain.2.minified.js  |   4 +-
 .../derivedClassSuperProperties.1.normal.js   |   8 +-
 ...indingPatternAndAssignment1ES5.1.normal.js |  14 +-
 ...dingPatternAndAssignment1ES5.2.minified.js |   8 +-
 ...tternAndAssignment1ES5iterable.1.normal.js |  14 +-
 ...ernAndAssignment1ES5iterable.2.minified.js |   8 +-
 ...ayBindingPatternAndAssignment2.1.normal.js |  14 +-
 ...BindingPatternAndAssignment2.2.minified.js |  24 +-
 ...ayBindingPatternAndAssignment3.1.normal.js |  12 +-
 ...estructuringAssignabilityCheck.1.normal.js |   6 +-
 ...tructuringAssignabilityCheck.2.minified.js |   2 +-
 .../destructuringCatch.1.normal.js            |   2 +-
 .../destructuringCatch.2.minified.js          |   4 +-
 .../destructuringControlFlow.1.normal.js      |   4 +-
 ...EvaluationOrder(target=es2015).1.normal.js |   4 +-
 ...aluationOrder(target=es2015).2.minified.js |   4 +-
 ...ingEvaluationOrder(target=es5).1.normal.js |  12 +-
 ...gEvaluationOrder(target=es5).2.minified.js |  10 +-
 ...indingPatternAndAssignment1ES5.1.normal.js |  24 +-
 ...ctBindingPatternAndAssignment4.1.normal.js |   4 +-
 ...BindingPatternAndAssignment4.2.minified.js |   2 +-
 ...ternAndAssignment6(target=es5).1.normal.js |   4 +-
 ...rnAndAssignment6(target=es5).2.minified.js |   4 +-
 ...ternAndAssignment7(target=es5).1.normal.js |   4 +-
 ...rnAndAssignment7(target=es5).2.minified.js |   4 +-
 ...ternAndAssignment8(target=es5).1.normal.js |   4 +-
 ...rnAndAssignment8(target=es5).2.minified.js |   4 +-
 ...rameterDeclaration3ES5iterable.1.normal.js |   4 +-
 ...meterDeclaration3ES5iterable.2.minified.js |   8 +-
 ...ructuringParameterDeclaration8.1.normal.js |   2 +-
 .../destructuringSpread.1.normal.js           |   8 +-
 .../destructuringSpread.2.minified.js         |   8 +-
 ...cturingVariableDeclaration1ES5.1.normal.js |  36 +--
 ...uringVariableDeclaration1ES5.2.minified.js |  22 +-
 ...ariableDeclaration1ES5iterable.1.normal.js |  36 +--
 ...iableDeclaration1ES5iterable.2.minified.js |  22 +-
 ...tructuringVariableDeclaration2.1.normal.js |  14 +-
 ...ucturingVariableDeclaration2.2.minified.js |  10 +-
 ...cturingWithLiteralInitializers.1.normal.js |  28 +--
 ...uringWithLiteralInitializers.2.minified.js |  30 +--
 ...turingWithLiteralInitializers2.1.normal.js |  50 ++--
 .../elementAccessChain.1.normal.js            |  20 +-
 .../elementAccessChain.2.1.normal.js          |   6 +-
 .../elementAccessChain.2.2.minified.js        |   4 +-
 .../elementAccessChain.2.minified.js          |   4 +-
 ...owFunctionWhenUsingArguments18.1.normal.js |   4 +-
 ...ropertyAccessInHeritageClause1.1.normal.js |   4 +-
 ...ArrayBindingPatternParameter04.1.normal.js |   2 +-
 .../emptyAssignmentPatterns01_ES5.1.normal.js |   2 +-
 ...bjectBindingPatternParameter04.1.normal.js |   4 +-
 ...clarationBindingPatterns01_ES5.1.normal.js |  24 +-
 ...arationBindingPatterns01_ES5.2.minified.js |  14 +-
 ...nBindingPatterns01_ES5iterable.1.normal.js |  24 +-
 ...indingPatterns01_ES5iterable.2.minified.js |  14 +-
 .../exhaustiveSwitchStatements1.1.normal.js   |   4 +-
 .../tests/tsc-references/for-of30.1.normal.js |   4 +-
 .../tsc-references/for-of30.2.minified.js     |   4 +-
 ...nericClassExpressionInFunction.1.normal.js |   4 +-
 ...ricClassExpressionInFunction.2.minified.js |   4 +-
 .../inferFromBindingPattern.1.normal.js       |  12 +-
 .../inferFromBindingPattern.2.minified.js     |   4 +-
 ...MemberWithComputedPropertyName.1.normal.js |   4 +-
 ...rfaceExtendsObjectIntersection.1.normal.js |  44 ++--
 ...xtendsObjectIntersectionErrors.1.normal.js |  20 +-
 ...DeclarationsReexportedCjsAlias.1.normal.js |   2 +-
 ...clarationsReexportedCjsAlias.2.minified.js |   2 +-
 .../jsDeclarationsTypeReferences2.1.normal.js |   2 +-
 ...sDeclarationsTypeReferences2.2.minified.js |   2 +-
 ...defPropertyAndExportAssignment.1.normal.js |   2 +-
 ...fPropertyAndExportAssignment.2.minified.js |   4 +-
 .../tsc-references/literalTypes2.1.normal.js  |   8 +-
 .../literalTypesAndDestructuring.1.normal.js  |  14 +-
 .../literalTypesAndTypeAssertions.1.normal.js |  16 +-
 ...calAssignment10(target=es2015).1.normal.js |  10 +-
 ...lAssignment10(target=es2015).2.minified.js |   6 +-
 ...calAssignment10(target=es2020).1.normal.js |   6 +-
 ...lAssignment10(target=es2020).2.minified.js |   6 +-
 ...icalAssignment2(target=es2015).1.normal.js |  22 +-
 ...alAssignment2(target=es2015).2.minified.js |   4 +-
 ...icalAssignment2(target=es2020).1.normal.js |  14 +-
 ...alAssignment2(target=es2020).2.minified.js |   4 +-
 ...icalAssignment8(target=es2015).1.normal.js |  12 +-
 .../missingAndExcessProperties.1.normal.js    |  16 +-
 .../mixinAccessModifiers.1.normal.js          |  24 +-
 .../mixinAccessModifiers.2.minified.js        |  12 +-
 .../nestedDestructuringOfRequire.1.normal.js  |   2 +-
 .../nullishCoalescingOperator1.1.normal.js    |   4 +-
 .../nullishCoalescingOperator10.1.normal.js   |   4 +-
 .../nullishCoalescingOperator12.1.normal.js   |   4 +-
 .../nullishCoalescingOperator12.2.minified.js |   4 +-
 .../nullishCoalescingOperator3.1.normal.js    |   4 +-
 .../nullishCoalescingOperator8.1.normal.js    |  12 +-
 .../nullishCoalescingOperator8.2.minified.js  |   4 +-
 ...nAsyncGenerator(target=es2015).1.normal.js |   4 +-
 ...orInAsyncGenerator(target=es5).1.normal.js |   4 +-
 ...rBindingPattern(target=es2015).1.normal.js |   4 +-
 ...eterBindingPattern(target=es5).1.normal.js |   4 +-
 ...indingPattern.2(target=es2015).1.normal.js |   8 +-
 ...erBindingPattern.2(target=es5).1.normal.js |   8 +-
 ...BindingPattern.2(target=es5).2.minified.js |   6 +-
 ...eterInitializer(target=es2015).1.normal.js |   4 +-
 ...rameterInitializer(target=es5).1.normal.js |   4 +-
 ...erInitializer.2(target=es2015).1.normal.js |   8 +-
 ...meterInitializer.2(target=es5).1.normal.js |   8 +-
 ...ingPatternKeywordIdentifiers06.1.normal.js |   4 +-
 .../objectRestForOf.1.normal.js               |   6 +-
 .../objectRestForOf.2.minified.js             |   6 +-
 .../objectRestParameterES5.1.normal.js        |   4 +-
 .../optionalBindingParameters3.1.normal.js    |   2 +-
 .../optionalChainingInLoop.1.normal.js        |   4 +-
 .../optionalChainingInLoop.2.minified.js      |   4 +-
 ...rBindingPattern(target=es2015).1.normal.js |   4 +-
 ...eterBindingPattern(target=es5).1.normal.js |   4 +-
 ...indingPattern.2(target=es2015).1.normal.js |   6 +-
 ...erBindingPattern.2(target=es5).1.normal.js |   6 +-
 ...BindingPattern.2(target=es5).2.minified.js |   6 +-
 ...eterInitializer(target=es2015).1.normal.js |   4 +-
 ...rameterInitializer(target=es5).1.normal.js |   4 +-
 ...meterInitializer(target=es5).2.minified.js |   4 +-
 ...erInitializer.2(target=es2015).1.normal.js |   6 +-
 ...meterInitializer.2(target=es5).1.normal.js |   6 +-
 ...terInitializer.2(target=es5).2.minified.js |   6 +-
 ...nTypeAssertions(target=es2015).1.normal.js |  10 +-
 ...ypeAssertions(target=es2015).2.minified.js |   4 +-
 ...ackwardReferencing(target=es5).1.normal.js |   4 +-
 ...rwardReferencing.2(target=es5).1.normal.js |   2 +-
 .../parserES5ForOfStatement11.1.normal.js     |   2 +-
 .../parserES5ForOfStatement11.2.minified.js   |   4 +-
 .../parserES5ForOfStatement12.1.normal.js     |   2 +-
 .../parserES5ForOfStatement12.2.minified.js   |   4 +-
 .../parserES5ForOfStatement13.1.normal.js     |   2 +-
 .../parserES5ForOfStatement13.2.minified.js   |   4 +-
 .../parserES5ForOfStatement14.1.normal.js     |   2 +-
 .../parserES5ForOfStatement14.2.minified.js   |   4 +-
 .../parserES5ForOfStatement15.1.normal.js     |   2 +-
 .../parserES5ForOfStatement15.2.minified.js   |   4 +-
 .../parserES5ForOfStatement16.1.normal.js     |   2 +-
 .../parserES5ForOfStatement16.2.minified.js   |   4 +-
 .../parserES5SymbolProperty6.1.normal.js      |   4 +-
 .../parserSymbolProperty6.1.normal.js         |   4 +-
 ...ateNameAccessorsCallExpression.1.normal.js |   4 +-
 ...edPropertyName2(target=es2015).1.normal.js |   4 +-
 ...edPropertyName3(target=es2015).1.normal.js |   4 +-
 ...PropertyName3(target=es2015).2.minified.js |   4 +-
 .../privateNameFieldAssignment.1.normal.js    |  26 +-
 ...privateNameFieldCallExpression.1.normal.js |   8 +-
 .../privateNameFieldUnaryMutation.1.normal.js |  10 +-
 ...ateNameInLhsReceiverExpression.1.normal.js |   6 +-
 ...rivateNameMethodCallExpression.1.normal.js |  10 +-
 ...ivateNameStaticFieldAssignment.1.normal.js |  26 +-
 ...eNameStaticFieldCallExpression.1.normal.js |   4 +-
 ...sAreNotAccessibleDestructuring.1.normal.js |   8 +-
 ...reNotAccessibleDestructuring.2.minified.js |   4 +-
 .../propertyAccessChain.1.normal.js           |  10 +-
 .../propertyAccessChain.2.1.normal.js         |   4 +-
 .../propertyAccessChain.2.2.minified.js       |   4 +-
 .../propertyAccessChain.2.minified.js         |   4 +-
 .../reexportClassDefinition.1.normal.js       |   4 +-
 ...restElementWithBindingPattern2.1.normal.js |   4 +-
 ...restElementWithNullInitializer.1.normal.js |   8 +-
 ...dContextualTypedBindingPattern.1.normal.js |   2 +-
 ...ontextualTypedBindingPattern.2.minified.js |   4 +-
 .../superMethodCall.1.normal.js               |   8 +-
 .../symbolDeclarationEmit11.1.normal.js       |  10 +-
 .../symbolDeclarationEmit11.2.minified.js     |   8 +-
 .../symbolDeclarationEmit2.1.normal.js        |   4 +-
 .../symbolProperty6.1.normal.js               |   8 +-
 .../symbolProperty7.1.normal.js               |   8 +-
 .../thisInInvalidContexts.1.normal.js         |   4 +-
 .../tsc-references/thisMethodCall.1.normal.js |   4 +-
 ...rectlyParseLessThanComparison1.1.normal.js |   4 +-
 ...ctlyParseLessThanComparison1.2.minified.js |   4 +-
 .../tsxDynamicTagName5.1.normal.js            |   4 +-
 .../tsxDynamicTagName5.2.minified.js          |   4 +-
 .../tsxDynamicTagName7.1.normal.js            |   4 +-
 .../tsxDynamicTagName7.2.minified.js          |   4 +-
 .../tsxDynamicTagName8.1.normal.js            |   4 +-
 .../tsxDynamicTagName8.2.minified.js          |   4 +-
 .../tsxDynamicTagName9.1.normal.js            |   4 +-
 .../tsxDynamicTagName9.2.minified.js          |   4 +-
 .../tsxExternalModuleEmit1.1.normal.js        |   8 +-
 .../tsxExternalModuleEmit1.2.minified.js      |   8 +-
 ...sxSpreadAttributesResolution17.1.normal.js |   4 +-
 ...SpreadAttributesResolution17.2.minified.js |   4 +-
 .../tupleElementTypes1.1.normal.js            |   4 +-
 .../tupleElementTypes1.2.minified.js          |   4 +-
 .../tupleElementTypes3.1.normal.js            |   4 +-
 .../tupleElementTypes3.2.minified.js          |   4 +-
 .../tupleElementTypes4.1.normal.js            |   4 +-
 .../typeFromPropertyAssignment25.1.normal.js  |   4 +-
 ...typeFromPropertyAssignment25.2.minified.js |   4 +-
 .../typeFromPropertyAssignment26.1.normal.js  |   4 +-
 ...omPropertyAssignmentOutOfOrder.1.normal.js |   8 +-
 ...PropertyAssignmentOutOfOrder.2.minified.js |   8 +-
 ...StaticMembers12(target=es2015).1.normal.js |   8 +-
 ...aticMembers12(target=es2015).2.minified.js |   8 +-
 ...sInStaticMembers12(target=es5).1.normal.js |   8 +-
 ...nStaticMembers12(target=es5).2.minified.js |   8 +-
 ...StaticMembers13(target=es2015).1.normal.js |   8 +-
 ...aticMembers13(target=es2015).2.minified.js |   8 +-
 ...sInStaticMembers13(target=es5).1.normal.js |   8 +-
 ...nStaticMembers13(target=es5).2.minified.js |   8 +-
 ...mberNarrowedWithLoopAntecedent.1.normal.js |   4 +-
 .../unionTypeReduction2.1.normal.js           |   4 +-
 .../wideningTuples5.1.normal.js               |   4 +-
 .../wideningTuples5.2.minified.js             |   4 +-
 .../wideningTuples6.1.normal.js               |   4 +-
 .../wideningTuples6.2.minified.js             |   4 +-
 .../vercel/loader-only/2/output/index.js      |   6 +-
 .../next-39460/output/snippetSession.js       |  12 +-
 .../react-autowhatever/1/output/index.js      |   2 +-
 .../react-instantsearch/1/output/index.js     |  14 +-
 .../tests/es2015_function_name.rs             |   4 +-
 .../src/es2015/mod.rs                         |   4 +-
 .../src/es2018/object_rest_spread.rs          |   2 +-
 .../mod.rs => nullish_coalescing.rs}          |   3 -
 .../src/es2020/opt_chaining.rs                |   9 +-
 .../tests/es2015_classes.rs                   |  24 +-
 .../tests/es2015_destructuring.rs             | 175 +++++++-------
 .../tests/es2015_parameters.rs                |  32 +--
 .../tests/es2015_spread.rs                    |  16 +-
 .../tests/es2017_async_to_generator.rs        |   6 +-
 .../tests/es2018_object_rest_spread.rs        |  41 ++--
 .../es2020_nullish_coalescing.rs}             |  29 ++-
 .../tests/es2020_optional_chaining.rs         | 225 ++++++++----------
 .../tests/es2022_class_properties.rs          |  84 +++----
 .../tests/strip.rs                            |  22 +-
 crates/swc_ecma_utils/src/lib.rs              |  53 ++++-
 .../pass/issue-1138/example-1/output/entry.js |   2 +-
 .../pass/issue-1138/example-2/output/entry.js |   2 +-
 312 files changed, 1532 insertions(+), 1519 deletions(-)
 rename crates/swc_ecma_transforms_compat/src/es2020/{nullish_coalescing/mod.rs => nullish_coalescing.rs} (99%)
 rename crates/swc_ecma_transforms_compat/{src/es2020/nullish_coalescing/tests.rs => tests/es2020_nullish_coalescing.rs} (77%)

diff --git a/crates/swc/tests/fixture/codegen/comment-1/es5/output/index.tsx b/crates/swc/tests/fixture/codegen/comment-1/es5/output/index.tsx
index 23ef66766745..0e96d05a8b45 100644
--- a/crates/swc/tests/fixture/codegen/comment-1/es5/output/index.tsx
+++ b/crates/swc/tests/fixture/codegen/comment-1/es5/output/index.tsx
@@ -1,6 +1,6 @@
 import _to_consumable_array from "@swc/helpers/src/_to_consumable_array.mjs";
 function a(param) {
-    var _b = param.b, b = _b === void 0 ? [] : _b;
+    var _param_b = param.b, b = _param_b === void 0 ? [] : _param_b;
     var t = useMemo(function() {
         return(// Cmt1
         _to_consumable_array(a.slice(0, 1)).concat(// Cmt2
diff --git a/crates/swc/tests/fixture/issues-1xxx/1107/1/output/index.js b/crates/swc/tests/fixture/issues-1xxx/1107/1/output/index.js
index 0bcf7f755c87..4364638b4ce2 100644
--- a/crates/swc/tests/fixture/issues-1xxx/1107/1/output/index.js
+++ b/crates/swc/tests/fixture/issues-1xxx/1107/1/output/index.js
@@ -1,13 +1,13 @@
 import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 export var Class1 = function Class1(param) {
     "use strict";
-    var _name = param.name, name = _name === void 0 ? "" : _name;
+    var _param_name = param.name, name = _param_name === void 0 ? "" : _param_name;
     _class_call_check(this, Class1);
     console.log(name);
 };
 export var Class2 = function Class2(param) {
     "use strict";
-    var _name = param.name, name = _name === void 0 ? "" : _name;
+    var _param_name = param.name, name = _param_name === void 0 ? "" : _param_name;
     _class_call_check(this, Class2);
     console.log(name);
 };
diff --git a/crates/swc/tests/fixture/issues-1xxx/1333/case2/output/index.js b/crates/swc/tests/fixture/issues-1xxx/1333/case2/output/index.js
index c016b7402a46..e73093f00353 100644
--- a/crates/swc/tests/fixture/issues-1xxx/1333/case2/output/index.js
+++ b/crates/swc/tests/fixture/issues-1xxx/1333/case2/output/index.js
@@ -271,9 +271,9 @@ class Shard extends _utils.Emitter {
      * Called whenever the websocket opens.
      * @private
      */ _open() {
-        var ref;
+        var _class_private_field_get;
         this.status = _utils.Status.HANDSHAKING;
-        this._debug(`Connected. ${(ref = _classPrivateFieldGet(this, _ws1)) === null || ref === void 0 ? void 0 : ref.url} in ${Date.now() - this.connectedAt}`);
+        this._debug(`Connected. ${(_class_private_field_get = _classPrivateFieldGet(this, _ws1)) === null || _class_private_field_get === void 0 ? void 0 : _class_private_field_get.url} in ${Date.now() - this.connectedAt}`);
         if (_classPrivateFieldGet(this, _queue).length) {
             this._debug(`${_classPrivateFieldGet(this, _queue).length} packets waiting... sending all now.`);
             while(_classPrivateFieldGet(this, _queue).length){
@@ -300,8 +300,8 @@ class Shard extends _utils.Emitter {
      * @param {WebSocket.CloseEvent} evt
      * @private
      */ _close(evt) {
-        var ref;
-        const reason = (ref = evt.reason || _utils.GatewayCloseCode[evt.code]) !== null && ref !== void 0 ? ref : "unknown";
+        var _ref;
+        const reason = (_ref = evt.reason || _utils.GatewayCloseCode[evt.code]) !== null && _ref !== void 0 ? _ref : "unknown";
         this._debug(`Closed; Code = ${evt.code}, Clean? = ${evt.wasClean}, Reason = ${reason}`);
         if (_classPrivateFieldGet(this, _seq) !== -1) {
             _classPrivateFieldSet(this, _closingSeq, _classPrivateFieldGet(this, _seq));
diff --git a/crates/swc/tests/fixture/issues-1xxx/1333/case3/output/index.js b/crates/swc/tests/fixture/issues-1xxx/1333/case3/output/index.js
index 4eb315835028..8a62b13def1a 100644
--- a/crates/swc/tests/fixture/issues-1xxx/1333/case3/output/index.js
+++ b/crates/swc/tests/fixture/issues-1xxx/1333/case3/output/index.js
@@ -59,8 +59,8 @@ class RequestHandler {
             ].includes(p) ? match : `/${p}/:id`).replace(/\/reactions\/[^/]+/g, "/reactions/:id").replace(/\/webhooks\/(\d+)\/[\w-]{64,}/, "webhooks/$1/:token").replace(/\?.*$/, "");
         let ending = ";";
         if (method === "delete" && route.endsWith("/message/:id")) {
-            var ref;
-            const id = (ref = /\d{16,19}$/.exec(route)) === null || ref === void 0 ? void 0 : ref[0];
+            var _exec;
+            const id = (_exec = /\d{16,19}$/.exec(route)) === null || _exec === void 0 ? void 0 : _exec[0];
             const snowflake = _utils.Snowflake.deconstruct(id);
             if (Date.now() - snowflake.timestamp > 1000 * 60 * 60 * 24 * 14) {
                 ending += "deletes-old";
@@ -73,8 +73,8 @@ class RequestHandler {
      * @param {Response} res
      * @return {* | Promise<any>}
      */ static async parseResponse(res) {
-        var ref;
-        if ((ref = res.headers.get("Content-Type")) === null || ref === void 0 ? void 0 : ref.startsWith("application/json")) {
+        var _res_headers_get;
+        if ((_res_headers_get = res.headers.get("Content-Type")) === null || _res_headers_get === void 0 ? void 0 : _res_headers_get.startsWith("application/json")) {
             return await res.json();
         }
         return res.buffer();
diff --git a/crates/swc/tests/fixture/issues-1xxx/1449/case1/output/index.js b/crates/swc/tests/fixture/issues-1xxx/1449/case1/output/index.js
index 7c4a08ab9e6f..5076a66a0d21 100644
--- a/crates/swc/tests/fixture/issues-1xxx/1449/case1/output/index.js
+++ b/crates/swc/tests/fixture/issues-1xxx/1449/case1/output/index.js
@@ -6,9 +6,9 @@ function foo() {
 }
 function _foo() {
     _foo = _async_to_generator(function() {
-        var tmp, ref, ref;
+        var tmp, _ref, _ref;
         return _ts_generator(this, function(_state) {
-            tmp = baz.bar, ref = tmp === void 0 ? {} : tmp, ref = ref !== null ? ref : _throw(new TypeError("Cannot destructure undefined"));
+            tmp = baz.bar, _ref = tmp === void 0 ? {} : tmp, _ref = _ref !== null ? _ref : _throw(new TypeError("Cannot destructure undefined"));
             return [
                 2
             ];
diff --git a/crates/swc/tests/fixture/issues-1xxx/1477/case1/output/index.js b/crates/swc/tests/fixture/issues-1xxx/1477/case1/output/index.js
index 912c41294696..a9a3bdc4c7a4 100644
--- a/crates/swc/tests/fixture/issues-1xxx/1477/case1/output/index.js
+++ b/crates/swc/tests/fixture/issues-1xxx/1477/case1/output/index.js
@@ -6,9 +6,9 @@ function f(a, b) {
 }
 function _f() {
     _f = _async_to_generator(function(a, b) {
-        var ref, ref1, tmp, a_;
+        var _JSON_parse, _JSON_parse_, tmp, a_;
         return _ts_generator(this, function(_state) {
-            ref = _sliced_to_array(JSON.parse(b), 1), ref1 = ref[0], tmp = ref1.a, a_ = tmp === void 0 ? 1 : tmp;
+            _JSON_parse = _sliced_to_array(JSON.parse(b), 1), _JSON_parse_ = _JSON_parse[0], tmp = _JSON_parse_.a, a_ = tmp === void 0 ? 1 : tmp;
             return [
                 2
             ];
diff --git a/crates/swc/tests/fixture/issues-1xxx/pr-1524/comment-1/output/index.tsx b/crates/swc/tests/fixture/issues-1xxx/pr-1524/comment-1/output/index.tsx
index d33078781ac0..12d3bc181cd1 100644
--- a/crates/swc/tests/fixture/issues-1xxx/pr-1524/comment-1/output/index.tsx
+++ b/crates/swc/tests/fixture/issues-1xxx/pr-1524/comment-1/output/index.tsx
@@ -1,6 +1,6 @@
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 function Bar() {
-    var ref = _sliced_to_array(useState(0), 2), foo = ref[0], setFoo = ref[1];
+    var _useState = _sliced_to_array(useState(0), 2), foo = _useState[0], setFoo = _useState[1];
     // @refresh reset
     React.useEffect(function() {});
     return /*#__PURE__*/ React.createElement("h1", null, foo, " ");
diff --git a/crates/swc/tests/fixture/issues-2xxx/2063/output/index.js b/crates/swc/tests/fixture/issues-2xxx/2063/output/index.js
index a95d615614c7..da143ae30e31 100644
--- a/crates/swc/tests/fixture/issues-2xxx/2063/output/index.js
+++ b/crates/swc/tests/fixture/issues-2xxx/2063/output/index.js
@@ -1,7 +1,7 @@
-var _value, ref;
+var _myVar_target_value, _myVar_target_value_toLowerCase;
 var myVar = {
     target: {
         value: "ABC"
     }
 };
-console.log((ref = (_value = myVar.target.value).toLowerCase) === null || ref === void 0 ? void 0 : ref.call(_value));
+console.log((_myVar_target_value_toLowerCase = (_myVar_target_value = myVar.target.value).toLowerCase) === null || _myVar_target_value_toLowerCase === void 0 ? void 0 : _myVar_target_value_toLowerCase.call(_myVar_target_value));
diff --git a/crates/swc/tests/fixture/issues-2xxx/2139/output/index.tsx b/crates/swc/tests/fixture/issues-2xxx/2139/output/index.tsx
index 630287216d4c..dd271f8a57c3 100644
--- a/crates/swc/tests/fixture/issues-2xxx/2139/output/index.tsx
+++ b/crates/swc/tests/fixture/issues-2xxx/2139/output/index.tsx
@@ -8,7 +8,7 @@ class ReusablePayments extends PureComponent {
         }
     }
     setDefaultReusablePayment(skipPaymentSource) {
-        var _props = this.props, reusablePaymentSources = _props.reusablePaymentSources, selectedReusablePayment = _props.selectedReusablePayment, onChange = _props.onChange;
+        var _this_props = this.props, reusablePaymentSources = _this_props.reusablePaymentSources, selectedReusablePayment = _this_props.selectedReusablePayment, onChange = _this_props.onChange;
         var validReusablePaymentSources = reusablePaymentSources.filter((ps)=>ps.__typename === "StripePaymentSource" && ps !== skipPaymentSource);
         if (selectedReusablePayment === null) {
             return;
@@ -25,7 +25,7 @@ class ReusablePayments extends PureComponent {
         onChange(ps || validReusablePaymentSources[0]);
     }
     render() {
-        var _props = this.props, selectedReusablePayment = _props.selectedReusablePayment, reusablePaymentSources = _props.reusablePaymentSources;
+        var _this_props = this.props, selectedReusablePayment = _this_props.selectedReusablePayment, reusablePaymentSources = _this_props.reusablePaymentSources;
         var stripePaymentSources = reusablePaymentSources.filter((ps)=>ps.__typename === "StripePaymentSource");
         if (!stripePaymentSources.length) {
             return null;
@@ -85,7 +85,7 @@ class ReusablePayments extends PureComponent {
             return this.props.onChange(selected);
         };
         this.handleDeletePaymentSource = (id, deletePaymentSource)=>{
-            var _props = this.props, selectedReusablePayment = _props.selectedReusablePayment, onChange = _props.onChange;
+            var _this_props = this.props, selectedReusablePayment = _this_props.selectedReusablePayment, onChange = _this_props.onChange;
             if (onChange && selectedReusablePayment && selectedReusablePayment.id === id) {
                 this.setDefaultReusablePayment(selectedReusablePayment);
             }
diff --git a/crates/swc/tests/fixture/issues-2xxx/2232/case1/output/index.js b/crates/swc/tests/fixture/issues-2xxx/2232/case1/output/index.js
index 617c6a218af9..9975f02b0846 100644
--- a/crates/swc/tests/fixture/issues-2xxx/2232/case1/output/index.js
+++ b/crates/swc/tests/fixture/issues-2xxx/2232/case1/output/index.js
@@ -13,9 +13,9 @@ var Foo = /*#__PURE__*/ function() {
             key: "sendSomeMessage",
             value: function sendSomeMessage(_parent, _param, _param1) {
                 return _async_to_generator(function() {
-                    var _input, toNumber, messageBody, all, dataSources;
+                    var _param_input, toNumber, messageBody, all, dataSources;
                     return _ts_generator(this, function(_state) {
-                        _input = _param.input, toNumber = _input.toNumber, messageBody = _input.messageBody, all = _object_without_properties(_param.input, [
+                        _param_input = _param.input, toNumber = _param_input.toNumber, messageBody = _param_input.messageBody, all = _object_without_properties(_param.input, [
                             "toNumber",
                             "messageBody"
                         ]), dataSources = _param1.dataSources;
diff --git a/crates/swc/tests/fixture/issues-2xxx/2232/case2/output/index.ts b/crates/swc/tests/fixture/issues-2xxx/2232/case2/output/index.ts
index f4241398b4c6..0a6b59a8ed5b 100644
--- a/crates/swc/tests/fixture/issues-2xxx/2232/case2/output/index.ts
+++ b/crates/swc/tests/fixture/issues-2xxx/2232/case2/output/index.ts
@@ -4,9 +4,9 @@ import _ts_generator from "@swc/helpers/src/_ts_generator.mjs";
 var resolver = {
     sendSomeMessage: function sendSomeMessage(_parent, _param, _param1) {
         return _async_to_generator(function() {
-            var _input, toNumber, messageBody, all, dataSources;
+            var _param_input, toNumber, messageBody, all, dataSources;
             return _ts_generator(this, function(_state) {
-                _input = _param.input, toNumber = _input.toNumber, messageBody = _input.messageBody, all = _object_without_properties(_param.input, [
+                _param_input = _param.input, toNumber = _param_input.toNumber, messageBody = _param_input.messageBody, all = _object_without_properties(_param.input, [
                     "toNumber",
                     "messageBody"
                 ]), dataSources = _param1.dataSources;
diff --git a/crates/swc/tests/fixture/issues-2xxx/2336/output/input.tsx b/crates/swc/tests/fixture/issues-2xxx/2336/output/input.tsx
index 4e9edb6f3abc..68d3ec2f8b5b 100644
--- a/crates/swc/tests/fixture/issues-2xxx/2336/output/input.tsx
+++ b/crates/swc/tests/fixture/issues-2xxx/2336/output/input.tsx
@@ -1,5 +1,5 @@
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
-var ref = _sliced_to_array(createQuery(), 2);
-export var useQuery = ref[0], query = ref[1].query;
-var ref1 = _sliced_to_array(createMutation(), 2);
-export var useMutation = ref1[0], mutate = ref1[1].mutate;
+var _createQuery = _sliced_to_array(createQuery(), 2);
+export var useQuery = _createQuery[0], query = _createQuery[1].query;
+var _createMutation = _sliced_to_array(createMutation(), 2);
+export var useMutation = _createMutation[0], mutate = _createMutation[1].mutate;
diff --git a/crates/swc/tests/fixture/issues-2xxx/2854/1/output/index.js b/crates/swc/tests/fixture/issues-2xxx/2854/1/output/index.js
index 91e947c2e413..fb6df143c295 100644
--- a/crates/swc/tests/fixture/issues-2xxx/2854/1/output/index.js
+++ b/crates/swc/tests/fixture/issues-2xxx/2854/1/output/index.js
@@ -2,7 +2,7 @@ export function App() {
     return React.createElement(Form, null);
 }
 export function Form(param) {
-    var _onChange = param.onChange, onChange = _onChange === void 0 ? function() {} : _onChange;
+    var _param_onChange = param.onChange, onChange = _param_onChange === void 0 ? function() {} : _param_onChange;
     return React.createElement("input", {
         onChange: function onChange1() {
             onChange();
diff --git a/crates/swc/tests/fixture/issues-2xxx/2858/1/output/index.js b/crates/swc/tests/fixture/issues-2xxx/2858/1/output/index.js
index b404ebbeff34..5a522f59d0c3 100644
--- a/crates/swc/tests/fixture/issues-2xxx/2858/1/output/index.js
+++ b/crates/swc/tests/fixture/issues-2xxx/2858/1/output/index.js
@@ -1,9 +1,9 @@
-var ref = {
+var _ref = {
     a: 1,
     b: 2
-}, a1 = ref.a, b1 = ref.b;
-var ref1 = {
+}, a1 = _ref.a, b1 = _ref.b;
+var _ref1 = {
     a: 1,
     b: 2
 };
-export var a2 = ref1.a, b2 = ref1.b;
+export var a2 = _ref1.a, b2 = _ref1.b;
diff --git a/crates/swc/tests/fixture/issues-2xxx/2858/2/output/index.js b/crates/swc/tests/fixture/issues-2xxx/2858/2/output/index.js
index b965bcc4ff40..4c028a9861cb 100644
--- a/crates/swc/tests/fixture/issues-2xxx/2858/2/output/index.js
+++ b/crates/swc/tests/fixture/issues-2xxx/2858/2/output/index.js
@@ -16,12 +16,12 @@ _export(exports, {
         return b2;
     }
 });
-var ref = {
+var _ref = {
     a: 1,
     b: 2
-}, a1 = ref.a, b1 = ref.b;
-var ref1 = {
+}, a1 = _ref.a, b1 = _ref.b;
+var _ref1 = {
     a: 1,
     b: 2
 };
-var a2 = ref1.a, b2 = ref1.b;
+var a2 = _ref1.a, b2 = _ref1.b;
diff --git a/crates/swc/tests/fixture/issues-4xxx/4108/1/output/index.ts b/crates/swc/tests/fixture/issues-4xxx/4108/1/output/index.ts
index c118404be45d..caf20e541753 100644
--- a/crates/swc/tests/fixture/issues-4xxx/4108/1/output/index.ts
+++ b/crates/swc/tests/fixture/issues-4xxx/4108/1/output/index.ts
@@ -484,7 +484,7 @@ export var sendTransaction = function() {
 }();
 export var sendTransactionWithRetry = function() {
     var _ref = _async_to_generator(function(connection, wallet, instructions, signers) {
-        var commitment, includesFeePayer, block, beforeSend, transaction, _tmp, _transaction, _transaction1, _transaction2, ref, txid, slot;
+        var commitment, includesFeePayer, block, beforeSend, transaction, _tmp, _transaction, _transaction1, _transaction2, _ref, txid, slot;
         var _arguments = arguments;
         return _ts_generator(this, function(_state) {
             switch(_state.label){
@@ -550,7 +550,7 @@ export var sendTransactionWithRetry = function() {
                         })
                     ];
                 case 5:
-                    ref = _state.sent(), txid = ref.txid, slot = ref.slot;
+                    _ref = _state.sent(), txid = _ref.txid, slot = _ref.slot;
                     return [
                         2,
                         {
@@ -574,11 +574,11 @@ export function sendSignedTransaction(_) {
 }
 function _sendSignedTransaction() {
     _sendSignedTransaction = _async_to_generator(function(param) {
-        var signedTransaction, connection, _timeout, timeout, rawTransaction, startTime, slot, txid, done, confirmation, err, simulateResult, e, i, line;
+        var signedTransaction, connection, _param_timeout, timeout, rawTransaction, startTime, slot, txid, done, confirmation, err, simulateResult, e, i, line;
         return _ts_generator(this, function(_state) {
             switch(_state.label){
                 case 0:
-                    signedTransaction = param.signedTransaction, connection = param.connection, _timeout = param.timeout, timeout = _timeout === void 0 ? DEFAULT_TIMEOUT : _timeout;
+                    signedTransaction = param.signedTransaction, connection = param.connection, _param_timeout = param.timeout, timeout = _param_timeout === void 0 ? DEFAULT_TIMEOUT : _param_timeout;
                     rawTransaction = signedTransaction.serialize();
                     startTime = getUnixTs();
                     slot = 0;
diff --git a/crates/swc/tests/fixture/issues-5xxx/5102/output/index.js b/crates/swc/tests/fixture/issues-5xxx/5102/output/index.js
index abb0dd97d318..0d0af8dfa944 100644
--- a/crates/swc/tests/fixture/issues-5xxx/5102/output/index.js
+++ b/crates/swc/tests/fixture/issues-5xxx/5102/output/index.js
@@ -4,22 +4,22 @@ var a = function a() {
     "use strict";
     _class_call_check(this, a);
 };
-var ref = [
+var _ref = [
     function _class() {
         "use strict";
         _class_call_check(this, _class);
     }
-], b = ref[0];
-var ref1 = [], tmp = ref1[0], c = tmp === void 0 ? function c() {
+], b = _ref[0];
+var _ref1 = [], tmp = _ref1[0], c = tmp === void 0 ? function c() {
     "use strict";
     _class_call_check(this, c);
 } : tmp;
-var ref2 = [
+var _ref2 = [
     function _class() {
         "use strict";
         _class_call_check(this, _class);
     }
-], tmp1 = ref2[0], d = tmp1 === void 0 ? function d() {
+], tmp1 = _ref2[0], d = tmp1 === void 0 ? function d() {
     "use strict";
     _class_call_check(this, d);
 } : tmp1;
@@ -29,20 +29,20 @@ var e = {
         _class_call_check(this, e);
     }
 }.e;
-var ref3 = {}, _f = ref3.f, f = _f === void 0 ? function f() {
+var _ref3 = {}, _ref_f = _ref3.f, f = _ref_f === void 0 ? function f() {
     "use strict";
     _class_call_check(this, f);
-} : _f;
-var ref4 = {
+} : _ref_f;
+var _ref4 = {
     g: function g() {
         "use strict";
         _class_call_check(this, g);
     }
-}, _g = ref4.g, g = _g === void 0 ? function g() {
+}, _ref_g = _ref4.g, g = _ref_g === void 0 ? function g() {
     "use strict";
     _class_call_check(this, g);
-} : _g;
-var ref5 = {}, tmp2 = ref5._, h = tmp2 === void 0 ? function h() {
+} : _ref_g;
+var _ref5 = {}, tmp2 = _ref5._, h = tmp2 === void 0 ? function h() {
     "use strict";
     _class_call_check(this, h);
 } : tmp2;
diff --git a/crates/swc/tests/fixture/next.js/shared/lib/router/1/output/index.ts b/crates/swc/tests/fixture/next.js/shared/lib/router/1/output/index.ts
index 586d89c76b2f..c1cfad6f6ef0 100644
--- a/crates/swc/tests/fixture/next.js/shared/lib/router/1/output/index.ts
+++ b/crates/swc/tests/fixture/next.js/shared/lib/router/1/output/index.ts
@@ -10,7 +10,7 @@ var Router = /*#__PURE__*/ function() {
     _proto.change = function change(method, url, as, options, forcedScroll) {
         var _this = this;
         return _async_to_generator(function() {
-            var shouldResolveHref, prevLocale, parsedAs, localePathResult, didNavigate, ref, detectedDomain, asNoBasePath, _shallow, shallow, routeProps, cleanedAs, localeChange, parsed, pathname, query, pages, rewrites, ref1, err, resolvedAs, rewritesResult, route, parsedAs1, asPathname, routeRegex, routeMatch, shouldInterpolate, interpolatedAs, missingParams, ref2, ref3, routeInfo, error, props, __N_SSG, __N_SSP, destination, parsedHref, ref4, newUrl, newAs, notFoundRoute, _, isValidShallowRoute, _scroll, shouldScroll, resetScroll, err1;
+            var shouldResolveHref, prevLocale, parsedAs, localePathResult, didNavigate, _this_locales, detectedDomain, asNoBasePath, _options_shallow, shallow, routeProps, cleanedAs, localeChange, parsed, pathname, query, pages, rewrites, ref, err, resolvedAs, rewritesResult, route, parsedAs1, asPathname, routeRegex, routeMatch, shouldInterpolate, interpolatedAs, missingParams, _self___NEXT_DATA___props, _self___NEXT_DATA___props_pageProps, routeInfo, error, props, __N_SSG, __N_SSP, destination, parsedHref, _prepareUrlAs, newUrl, newAs, notFoundRoute, _, isValidShallowRoute, _options_scroll, shouldScroll, resetScroll, err1;
             return _ts_generator(this, function(_state) {
                 switch(_state.label){
                     case 0:
@@ -47,7 +47,7 @@ var Router = /*#__PURE__*/ function() {
                             if (process.env.__NEXT_I18N_SUPPORT) {
                                 ;
                                 // if the locale isn't configured hard navigate to show 404 page
-                                if (!((ref = _this.locales) === null || ref === void 0 ? void 0 : ref.includes(_this.locale))) {
+                                if (!((_this_locales = _this.locales) === null || _this_locales === void 0 ? void 0 : _this_locales.includes(_this.locale))) {
                                     parsedAs.pathname = addLocale(parsedAs.pathname, _this.locale);
                                     window.location.href = formatWithValidation(parsedAs);
                                     // this was previously a return but was removed in favor
@@ -83,7 +83,7 @@ var Router = /*#__PURE__*/ function() {
                         if (ST) {
                             performance.mark("routeChange");
                         }
-                        _shallow = options.shallow, shallow = _shallow === void 0 ? false : _shallow;
+                        _options_shallow = options.shallow, shallow = _options_shallow === void 0 ? false : _options_shallow;
                         routeProps = {
                             shallow: shallow
                         };
@@ -133,7 +133,7 @@ var Router = /*#__PURE__*/ function() {
                             getClientBuildManifest()
                         ];
                     case 3:
-                        ref1 = _state.sent(), rewrites = ref1.__rewrites, ref1;
+                        ref = _state.sent(), rewrites = ref.__rewrites, ref;
                         return [
                             3,
                             5
@@ -251,7 +251,7 @@ var Router = /*#__PURE__*/ function() {
                             if (destination.startsWith("/") && props.pageProps.__N_REDIRECT_BASE_PATH !== false) {
                                 parsedHref = parseRelativeUrl(destination);
                                 parsedHref.pathname = resolveDynamicRoute(parsedHref.pathname, pages);
-                                ref4 = prepareUrlAs(_this, destination, destination), newUrl = ref4.url, newAs = ref4.as;
+                                _prepareUrlAs = prepareUrlAs(_this, destination, destination), newUrl = _prepareUrlAs.url, newAs = _prepareUrlAs.as;
                                 return [
                                     2,
                                     _this.change(method, newUrl, newAs, options)
@@ -307,13 +307,13 @@ var Router = /*#__PURE__*/ function() {
                     case 13:
                         Router.events.emit("beforeHistoryChange", as, routeProps);
                         _this.changeState(method, url, as, options);
-                        if (options._h && pathname === "/_error" && ((ref2 = self.__NEXT_DATA__.props) === null || ref2 === void 0 ? void 0 : (ref3 = ref2.pageProps) === null || ref3 === void 0 ? void 0 : ref3.statusCode) === 500 && (props === null || props === void 0 ? void 0 : props.pageProps)) {
+                        if (options._h && pathname === "/_error" && ((_self___NEXT_DATA___props = self.__NEXT_DATA__.props) === null || _self___NEXT_DATA___props === void 0 ? void 0 : (_self___NEXT_DATA___props_pageProps = _self___NEXT_DATA___props.pageProps) === null || _self___NEXT_DATA___props_pageProps === void 0 ? void 0 : _self___NEXT_DATA___props_pageProps.statusCode) === 500 && (props === null || props === void 0 ? void 0 : props.pageProps)) {
                             // ensure statusCode is still correct for static 500 page
                             // when updating query information
                             props.pageProps.statusCode = 500;
                         }
                         isValidShallowRoute = options.shallow && _this.route === route;
-                        shouldScroll = (_scroll = options.scroll) !== null && _scroll !== void 0 ? _scroll : !isValidShallowRoute;
+                        shouldScroll = (_options_scroll = options.scroll) !== null && _options_scroll !== void 0 ? _options_scroll : !isValidShallowRoute;
                         resetScroll = shouldScroll ? {
                             x: 0,
                             y: 0
diff --git a/crates/swc/tests/fixture/shopify/002/output/index.js b/crates/swc/tests/fixture/shopify/002/output/index.js
index 06d72a5200c3..a7974d80c5b6 100644
--- a/crates/swc/tests/fixture/shopify/002/output/index.js
+++ b/crates/swc/tests/fixture/shopify/002/output/index.js
@@ -13,6 +13,6 @@ var _slicedToArray = require("@swc/helpers/lib/_sliced_to_array.js").default;
 var _react = /*#__PURE__*/ _interopRequireDefault(require("react"));
 var _reactI18N = require("@shopify/react-i18n");
 function App() {
-    var ref = _slicedToArray((0, _reactI18N.useI18n)(), 1), i18n = ref[0];
+    var _useI18n = _slicedToArray((0, _reactI18N.useI18n)(), 1), i18n = _useI18n[0];
     return /*#__PURE__*/ _react.default.createElement("h1", null, i18n.translate("foo"));
 }
diff --git a/crates/swc/tests/fixture/shopify/003-env/output/index.js b/crates/swc/tests/fixture/shopify/003-env/output/index.js
index 06d72a5200c3..a7974d80c5b6 100644
--- a/crates/swc/tests/fixture/shopify/003-env/output/index.js
+++ b/crates/swc/tests/fixture/shopify/003-env/output/index.js
@@ -13,6 +13,6 @@ var _slicedToArray = require("@swc/helpers/lib/_sliced_to_array.js").default;
 var _react = /*#__PURE__*/ _interopRequireDefault(require("react"));
 var _reactI18N = require("@shopify/react-i18n");
 function App() {
-    var ref = _slicedToArray((0, _reactI18N.useI18n)(), 1), i18n = ref[0];
+    var _useI18n = _slicedToArray((0, _reactI18N.useI18n)(), 1), i18n = _useI18n[0];
     return /*#__PURE__*/ _react.default.createElement("h1", null, i18n.translate("foo"));
 }
diff --git a/crates/swc/tests/fixture/shopify/004-jest/output/index.js b/crates/swc/tests/fixture/shopify/004-jest/output/index.js
index 06d72a5200c3..a7974d80c5b6 100644
--- a/crates/swc/tests/fixture/shopify/004-jest/output/index.js
+++ b/crates/swc/tests/fixture/shopify/004-jest/output/index.js
@@ -13,6 +13,6 @@ var _slicedToArray = require("@swc/helpers/lib/_sliced_to_array.js").default;
 var _react = /*#__PURE__*/ _interopRequireDefault(require("react"));
 var _reactI18N = require("@shopify/react-i18n");
 function App() {
-    var ref = _slicedToArray((0, _reactI18N.useI18n)(), 1), i18n = ref[0];
+    var _useI18n = _slicedToArray((0, _reactI18N.useI18n)(), 1), i18n = _useI18n[0];
     return /*#__PURE__*/ _react.default.createElement("h1", null, i18n.translate("foo"));
 }
diff --git a/crates/swc/tests/fixture/shopify/005-no-module/output/index.js b/crates/swc/tests/fixture/shopify/005-no-module/output/index.js
index 4d1017ce8ff1..2bc9aab67943 100644
--- a/crates/swc/tests/fixture/shopify/005-no-module/output/index.js
+++ b/crates/swc/tests/fixture/shopify/005-no-module/output/index.js
@@ -2,6 +2,6 @@ import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 import React from "react";
 import { useI18n } from "@shopify/react-i18n";
 export function App() {
-    var ref = _sliced_to_array(useI18n(), 1), i18n = ref[0];
+    var _useI18n = _sliced_to_array(useI18n(), 1), i18n = _useI18n[0];
     return /*#__PURE__*/ React.createElement("h1", null, i18n.translate("foo"));
 }
diff --git a/crates/swc/tests/tsc-references/ES5For-of26.1.normal.js b/crates/swc/tests/tsc-references/ES5For-of26.1.normal.js
index d88f7d6b6cc0..ec61ca95b346 100644
--- a/crates/swc/tests/tsc-references/ES5For-of26.1.normal.js
+++ b/crates/swc/tests/tsc-references/ES5For-of26.1.normal.js
@@ -4,7 +4,7 @@ for(var _i = 0, _iter = [
     2,
     3
 ]; _i < _iter.length; _i++){
-    var __i = _sliced_to_array(_iter[_i], 2), tmp = __i[0], a = tmp === void 0 ? 0 : tmp, tmp1 = __i[1], b = tmp1 === void 0 ? 1 : tmp1;
+    var _iter__i = _sliced_to_array(_iter[_i], 2), tmp = _iter__i[0], a = tmp === void 0 ? 0 : tmp, tmp1 = _iter__i[1], b = tmp1 === void 0 ? 1 : tmp1;
     a;
     b;
 }
diff --git a/crates/swc/tests/tsc-references/ES5For-of26.2.minified.js b/crates/swc/tests/tsc-references/ES5For-of26.2.minified.js
index 85fedfc8b634..666d510aee00 100644
--- a/crates/swc/tests/tsc-references/ES5For-of26.2.minified.js
+++ b/crates/swc/tests/tsc-references/ES5For-of26.2.minified.js
@@ -4,6 +4,6 @@ for(var _i = 0, _iter = [
     2,
     3
 ]; _i < _iter.length; _i++){
-    var __i = _sliced_to_array(_iter[_i], 2);
-    __i[0], __i[1];
+    var _iter__i = _sliced_to_array(_iter[_i], 2);
+    _iter__i[0], _iter__i[1];
 }
diff --git a/crates/swc/tests/tsc-references/ES5For-of27.1.normal.js b/crates/swc/tests/tsc-references/ES5For-of27.1.normal.js
index 78ef3b5a2065..256a15374c09 100644
--- a/crates/swc/tests/tsc-references/ES5For-of27.1.normal.js
+++ b/crates/swc/tests/tsc-references/ES5For-of27.1.normal.js
@@ -3,7 +3,7 @@ for(var _i = 0, _iter = [
     2,
     3
 ]; _i < _iter.length; _i++){
-    var __i = _iter[_i], tmp = __i.x, a = tmp === void 0 ? 0 : tmp, tmp1 = __i.y, b = tmp1 === void 0 ? 1 : tmp1;
+    var _iter__i = _iter[_i], tmp = _iter__i.x, a = tmp === void 0 ? 0 : tmp, tmp1 = _iter__i.y, b = tmp1 === void 0 ? 1 : tmp1;
     a;
     b;
 }
diff --git a/crates/swc/tests/tsc-references/ES5For-of27.2.minified.js b/crates/swc/tests/tsc-references/ES5For-of27.2.minified.js
index 2f1cf2e44666..1443282f0a9a 100644
--- a/crates/swc/tests/tsc-references/ES5For-of27.2.minified.js
+++ b/crates/swc/tests/tsc-references/ES5For-of27.2.minified.js
@@ -3,6 +3,6 @@ for(var _i = 0, _iter = [
     2,
     3
 ]; _i < _iter.length; _i++){
-    var __i = _iter[_i];
-    __i.x, __i.y;
+    var _iter__i = _iter[_i];
+    _iter__i.x, _iter__i.y;
 }
diff --git a/crates/swc/tests/tsc-references/ES5For-of28.1.normal.js b/crates/swc/tests/tsc-references/ES5For-of28.1.normal.js
index 6826b2e36cf6..058aa082467c 100644
--- a/crates/swc/tests/tsc-references/ES5For-of28.1.normal.js
+++ b/crates/swc/tests/tsc-references/ES5For-of28.1.normal.js
@@ -4,7 +4,7 @@ for(var _i = 0, _iter = [
     2,
     3
 ]; _i < _iter.length; _i++){
-    var __i = _sliced_to_array(_iter[_i], 2), tmp = __i[0], a = tmp === void 0 ? 0 : tmp, tmp1 = __i[1], b = tmp1 === void 0 ? 1 : tmp1;
+    var _iter__i = _sliced_to_array(_iter[_i], 2), tmp = _iter__i[0], a = tmp === void 0 ? 0 : tmp, tmp1 = _iter__i[1], b = tmp1 === void 0 ? 1 : tmp1;
     a;
     b;
 }
diff --git a/crates/swc/tests/tsc-references/ES5For-of28.2.minified.js b/crates/swc/tests/tsc-references/ES5For-of28.2.minified.js
index 96abbb96a7f6..5a3f1ce3ef53 100644
--- a/crates/swc/tests/tsc-references/ES5For-of28.2.minified.js
+++ b/crates/swc/tests/tsc-references/ES5For-of28.2.minified.js
@@ -4,6 +4,6 @@ for(var _i = 0, _iter = [
     2,
     3
 ]; _i < _iter.length; _i++){
-    var __i = _sliced_to_array(_iter[_i], 2);
-    __i[0], __i[1];
+    var _iter__i = _sliced_to_array(_iter[_i], 2);
+    _iter__i[0], _iter__i[1];
 }
diff --git a/crates/swc/tests/tsc-references/ES5For-of29.1.normal.js b/crates/swc/tests/tsc-references/ES5For-of29.1.normal.js
index 45f6fea568e3..a21646e81934 100644
--- a/crates/swc/tests/tsc-references/ES5For-of29.1.normal.js
+++ b/crates/swc/tests/tsc-references/ES5For-of29.1.normal.js
@@ -3,7 +3,7 @@ for(var _i = 0, _iter = [
     2,
     3
 ]; _i < _iter.length; _i++){
-    var __i = _iter[_i], tmp = __i.x, a = tmp === void 0 ? 0 : tmp, tmp1 = __i.y, b = tmp1 === void 0 ? 1 : tmp1;
+    var _iter__i = _iter[_i], tmp = _iter__i.x, a = tmp === void 0 ? 0 : tmp, tmp1 = _iter__i.y, b = tmp1 === void 0 ? 1 : tmp1;
     a;
     b;
 }
diff --git a/crates/swc/tests/tsc-references/ES5For-of29.2.minified.js b/crates/swc/tests/tsc-references/ES5For-of29.2.minified.js
index 871e90af490b..deac3d70e261 100644
--- a/crates/swc/tests/tsc-references/ES5For-of29.2.minified.js
+++ b/crates/swc/tests/tsc-references/ES5For-of29.2.minified.js
@@ -3,6 +3,6 @@ for(var _i = 0, _iter = [
     2,
     3
 ]; _i < _iter.length; _i++){
-    var __i = _iter[_i];
-    __i.x, __i.y;
+    var _iter__i = _iter[_i];
+    _iter__i.x, _iter__i.y;
 }
diff --git a/crates/swc/tests/tsc-references/ES5For-of35.1.normal.js b/crates/swc/tests/tsc-references/ES5For-of35.1.normal.js
index 257c601be13c..4ee48653dc92 100644
--- a/crates/swc/tests/tsc-references/ES5For-of35.1.normal.js
+++ b/crates/swc/tests/tsc-references/ES5For-of35.1.normal.js
@@ -3,7 +3,7 @@ for(var _i = 0, _iter = [
     2,
     3
 ]; _i < _iter.length; _i++){
-    var __i = _iter[_i], tmp = __i.x, a = tmp === void 0 ? 0 : tmp, tmp1 = __i.y, b = tmp1 === void 0 ? 1 : tmp1;
+    var _iter__i = _iter[_i], tmp = _iter__i.x, a = tmp === void 0 ? 0 : tmp, tmp1 = _iter__i.y, b = tmp1 === void 0 ? 1 : tmp1;
     a;
     b;
 }
diff --git a/crates/swc/tests/tsc-references/ES5For-of35.2.minified.js b/crates/swc/tests/tsc-references/ES5For-of35.2.minified.js
index 5f9ef49b8262..c7168e2ac535 100644
--- a/crates/swc/tests/tsc-references/ES5For-of35.2.minified.js
+++ b/crates/swc/tests/tsc-references/ES5For-of35.2.minified.js
@@ -3,6 +3,6 @@ for(var _i = 0, _iter = [
     2,
     3
 ]; _i < _iter.length; _i++){
-    var __i = _iter[_i];
-    __i.x, __i.y;
+    var _iter__i = _iter[_i];
+    _iter__i.x, _iter__i.y;
 }
diff --git a/crates/swc/tests/tsc-references/ES5For-of36.1.normal.js b/crates/swc/tests/tsc-references/ES5For-of36.1.normal.js
index 17c715ccb28e..c4aa01e3ef4a 100644
--- a/crates/swc/tests/tsc-references/ES5For-of36.1.normal.js
+++ b/crates/swc/tests/tsc-references/ES5For-of36.1.normal.js
@@ -4,7 +4,7 @@ for(var _i = 0, _iter = [
     2,
     3
 ]; _i < _iter.length; _i++){
-    var __i = _sliced_to_array(_iter[_i], 2), tmp = __i[0], a = tmp === void 0 ? 0 : tmp, tmp1 = __i[1], b = tmp1 === void 0 ? 1 : tmp1;
+    var _iter__i = _sliced_to_array(_iter[_i], 2), tmp = _iter__i[0], a = tmp === void 0 ? 0 : tmp, tmp1 = _iter__i[1], b = tmp1 === void 0 ? 1 : tmp1;
     a;
     b;
 }
diff --git a/crates/swc/tests/tsc-references/ES5For-of36.2.minified.js b/crates/swc/tests/tsc-references/ES5For-of36.2.minified.js
index 8bb06af1d4fa..ddfa1abf91fc 100644
--- a/crates/swc/tests/tsc-references/ES5For-of36.2.minified.js
+++ b/crates/swc/tests/tsc-references/ES5For-of36.2.minified.js
@@ -4,6 +4,6 @@ for(var _i = 0, _iter = [
     2,
     3
 ]; _i < _iter.length; _i++){
-    var __i = _sliced_to_array(_iter[_i], 2);
-    __i[0], __i[1];
+    var _iter__i = _sliced_to_array(_iter[_i], 2);
+    _iter__i[0], _iter__i[1];
 }
diff --git a/crates/swc/tests/tsc-references/argumentExpressionContextualTyping.1.normal.js b/crates/swc/tests/tsc-references/argumentExpressionContextualTyping.1.normal.js
index d99668de5889..1aa96e335a28 100644
--- a/crates/swc/tests/tsc-references/argumentExpressionContextualTyping.1.normal.js
+++ b/crates/swc/tests/tsc-references/argumentExpressionContextualTyping.1.normal.js
@@ -3,12 +3,12 @@
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 import _to_consumable_array from "@swc/helpers/src/_to_consumable_array.mjs";
 function foo(param) {
-    var _x = _sliced_to_array(param.x, 2), a = _x[0], b = _x[1], _y = param.y, c = _y.c, d = _y.d, e = _y.e;
+    var _param_x = _sliced_to_array(param.x, 2), a = _param_x[0], b = _param_x[1], _param_y = param.y, c = _param_y.c, d = _param_y.d, e = _param_y.e;
 }
 function bar(param) {
-    var _x = _sliced_to_array(param.x, 2), a = _x[0], tmp = _x[1], b = tmp === void 0 ? 10 : tmp, _y = param.y, c = _y.c, d = _y.d, _e = _y.e, e = _e === void 0 ? {
+    var _param_x = _sliced_to_array(param.x, 2), a = _param_x[0], tmp = _param_x[1], b = tmp === void 0 ? 10 : tmp, _param_y = param.y, c = _param_y.c, d = _param_y.d, _param_y_e = _param_y.e, e = _param_y_e === void 0 ? {
         f: 1
-    } : _e;
+    } : _param_y_e;
 }
 function baz(x) {}
 var o = {
diff --git a/crates/swc/tests/tsc-references/argumentExpressionContextualTyping.2.minified.js b/crates/swc/tests/tsc-references/argumentExpressionContextualTyping.2.minified.js
index b31f017f4401..43be12fc510c 100644
--- a/crates/swc/tests/tsc-references/argumentExpressionContextualTyping.2.minified.js
+++ b/crates/swc/tests/tsc-references/argumentExpressionContextualTyping.2.minified.js
@@ -2,8 +2,8 @@
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 import _to_consumable_array from "@swc/helpers/src/_to_consumable_array.mjs";
 function foo(param) {
-    var _x = _sliced_to_array(param.x, 2), _y = (_x[0], _x[1], param.y);
-    _y.c, _y.d, _y.e;
+    var _param_x = _sliced_to_array(param.x, 2), _param_y = (_param_x[0], _param_x[1], param.y);
+    _param_y.c, _param_y.d, _param_y.e;
 }
 foo({
     x: [
diff --git a/crates/swc/tests/tsc-references/arrayLiterals2ES5.1.normal.js b/crates/swc/tests/tsc-references/arrayLiterals2ES5.1.normal.js
index 1ee8353fa05f..b214f5f555ec 100644
--- a/crates/swc/tests/tsc-references/arrayLiterals2ES5.1.normal.js
+++ b/crates/swc/tests/tsc-references/arrayLiterals2ES5.1.normal.js
@@ -64,11 +64,11 @@ var b1 = [
 //     - If the array literal contains no spread elements and is an array assignment pattern in a destructuring assignment (section 4.17.1),
 //       the resulting type is a tuple type constructed from the types of the element expressions.
 var c0 = 1, c1 = 2; // tuple type [number, number]
-var ref = [
+var _ref = [
     1,
     2,
     true
-], c2 = ref[0], c3 = ref[1]; // tuple type [number, number, boolean]
+], c2 = _ref[0], c3 = _ref[1]; // tuple type [number, number, boolean]
 // The resulting type an array literal expression is determined as follows:
 //      - the resulting type is an array type with an element type that is the union of the types of the
 //        non - spread element expressions and the numeric index signature types of the spread element expressions
diff --git a/crates/swc/tests/tsc-references/arrayLiterals2ES5.2.minified.js b/crates/swc/tests/tsc-references/arrayLiterals2ES5.2.minified.js
index 053aa964f302..42ec0827c54e 100644
--- a/crates/swc/tests/tsc-references/arrayLiterals2ES5.2.minified.js
+++ b/crates/swc/tests/tsc-references/arrayLiterals2ES5.2.minified.js
@@ -19,12 +19,12 @@ var a0 = [
 ].concat(_to_consumable_array(a0)), _to_consumable_array(a0).concat([
     , 
 ]);
-var ref = [
+var _ref = [
     1,
     2,
     !0
 ];
-ref[0], ref[1];
+_ref[0], _ref[1];
 var temp = [
     "s",
     "t",
diff --git a/crates/swc/tests/tsc-references/arrayLiterals3.1.normal.js b/crates/swc/tests/tsc-references/arrayLiterals3.1.normal.js
index 34bfe82bb01b..d122490d3c93 100644
--- a/crates/swc/tests/tsc-references/arrayLiterals3.1.normal.js
+++ b/crates/swc/tests/tsc-references/arrayLiterals3.1.normal.js
@@ -16,12 +16,12 @@ var a1 = [
 // The resulting type an array literal expression is determined as follows:
 //     - If the array literal contains no spread elements and is an array assignment pattern in a destructuring assignment (section 4.17.1),
 //       the resulting type is a tuple type constructed from the types of the element expressions.
-var ref = [
+var _ref = [
     1,
     2,
     "string",
     true
-], b1 = ref[0], b2 = ref[1];
+], b1 = _ref[0], b2 = _ref[1];
 // The resulting type an array literal expression is determined as follows:
 //      - the resulting type is an array type with an element type that is the union of the types of the
 //        non - spread element expressions and the numeric index signature types of the spread element expressions
diff --git a/crates/swc/tests/tsc-references/arrayLiterals3.2.minified.js b/crates/swc/tests/tsc-references/arrayLiterals3.2.minified.js
index 9f6ca0341f71..5b88e228afd2 100644
--- a/crates/swc/tests/tsc-references/arrayLiterals3.2.minified.js
+++ b/crates/swc/tests/tsc-references/arrayLiterals3.2.minified.js
@@ -1,12 +1,12 @@
 //// [arrayLiterals3.ts]
 import _to_consumable_array from "@swc/helpers/src/_to_consumable_array.mjs";
-var ref = [
+var _ref = [
     1,
     2,
     "string",
     !0
 ];
-ref[0], ref[1];
+_ref[0], _ref[1];
 var temp1 = [
     1,
     2,
diff --git a/crates/swc/tests/tsc-references/arrowFunctionExpressions.1.normal.js b/crates/swc/tests/tsc-references/arrowFunctionExpressions.1.normal.js
index f25f8a88cd29..39d27f30c6b6 100644
--- a/crates/swc/tests/tsc-references/arrowFunctionExpressions.1.normal.js
+++ b/crates/swc/tests/tsc-references/arrowFunctionExpressions.1.normal.js
@@ -48,15 +48,15 @@ var p7 = function(param) {
     var b = param.a.b;
 };
 var p8 = function(param) {
-    var _a = param.a, a = _a === void 0 ? 1 : _a;
+    var _param_a = param.a, a = _param_a === void 0 ? 1 : _param_a;
 };
 var p9 = function(param) {
-    var tmp = param.a, ref = tmp === void 0 ? {
+    var tmp = param.a, _ref = tmp === void 0 ? {
         b: 1
-    } : tmp, _b = ref.b, b = _b === void 0 ? 1 : _b;
+    } : tmp, _ref_b = _ref.b, b = _ref_b === void 0 ? 1 : _ref_b;
 };
 var p10 = function(param) {
-    var _param = _sliced_to_array(param, 1), ref = _param[0], value = ref.value, done = ref.done;
+    var _param = _sliced_to_array(param, 1), _param_ = _param[0], value = _param_.value, done = _param_.done;
 };
 // Arrow function used in class member initializer
 // Arrow function used in class member function
diff --git a/crates/swc/tests/tsc-references/callChain.1.normal.js b/crates/swc/tests/tsc-references/callChain.1.normal.js
index 0015a9e7ce5a..4de61c932303 100644
--- a/crates/swc/tests/tsc-references/callChain.1.normal.js
+++ b/crates/swc/tests/tsc-references/callChain.1.normal.js
@@ -1,6 +1,6 @@
 //// [callChain.ts]
-var _o2, _o21, _o22, _o23, _ref, _ref1, _ref2, _ref3, _ref4, _ref5;
-var ref, ref1, ref2, ref3, ref4, ref5, ref6, ref7, ref8, ref9, ref10, ref11, ref12;
+var _o2, _o21, _o22, _o23, _o3_b, _o3_b1, _o3_b2, _o3_b3, _o3_b4, _o3_b5;
+var _o3_b6, _o3_b7, _o3_b8, _o3_b9, _o3_b10, _o3_b11, _o3_b12, _o3_b13, _o3_b14, _o3_b15, _o3_b16, _o3_b17, _o5;
 o1 === null || o1 === void 0 ? void 0 : o1();
 o1 === null || o1 === void 0 ? void 0 : o1(1);
 o1 === null || o1 === void 0 ? void 0 : o1.apply(void 0, [
@@ -37,42 +37,42 @@ o2 === null || o2 === void 0 ? void 0 : (_o23 = o2)["b"].apply(_o23, [
     3,
     4
 ]);
-(ref = o3.b) === null || ref === void 0 ? void 0 : ref.call(o3).c;
-(ref1 = o3.b) === null || ref1 === void 0 ? void 0 : ref1.call(o3, 1).c;
-(ref2 = o3.b) === null || ref2 === void 0 ? void 0 : (_ref = ref2).call.apply(_ref, [
+(_o3_b6 = o3.b) === null || _o3_b6 === void 0 ? void 0 : _o3_b6.call(o3).c;
+(_o3_b7 = o3.b) === null || _o3_b7 === void 0 ? void 0 : _o3_b7.call(o3, 1).c;
+(_o3_b8 = o3.b) === null || _o3_b8 === void 0 ? void 0 : (_o3_b = _o3_b8).call.apply(_o3_b, [
     o3,
     1,
     2
 ]).c;
-(ref3 = o3.b) === null || ref3 === void 0 ? void 0 : (_ref1 = ref3).call.apply(_ref1, [
+(_o3_b9 = o3.b) === null || _o3_b9 === void 0 ? void 0 : (_o3_b1 = _o3_b9).call.apply(_o3_b1, [
     o3,
     1,
     2,
     3,
     4
 ]).c;
-(ref4 = o3.b) === null || ref4 === void 0 ? void 0 : ref4.call(o3)["c"];
-(ref5 = o3.b) === null || ref5 === void 0 ? void 0 : ref5.call(o3, 1)["c"];
-(ref6 = o3.b) === null || ref6 === void 0 ? void 0 : (_ref2 = ref6).call.apply(_ref2, [
+(_o3_b10 = o3.b) === null || _o3_b10 === void 0 ? void 0 : _o3_b10.call(o3)["c"];
+(_o3_b11 = o3.b) === null || _o3_b11 === void 0 ? void 0 : _o3_b11.call(o3, 1)["c"];
+(_o3_b12 = o3.b) === null || _o3_b12 === void 0 ? void 0 : (_o3_b2 = _o3_b12).call.apply(_o3_b2, [
     o3,
     1,
     2
 ])["c"];
-(ref7 = o3.b) === null || ref7 === void 0 ? void 0 : (_ref3 = ref7).call.apply(_ref3, [
+(_o3_b13 = o3.b) === null || _o3_b13 === void 0 ? void 0 : (_o3_b3 = _o3_b13).call.apply(_o3_b3, [
     o3,
     1,
     2,
     3,
     4
 ])["c"];
-(ref8 = o3["b"]) === null || ref8 === void 0 ? void 0 : ref8.call(o3).c;
-(ref9 = o3["b"]) === null || ref9 === void 0 ? void 0 : ref9.call(o3, 1).c;
-(ref10 = o3["b"]) === null || ref10 === void 0 ? void 0 : (_ref4 = ref10).call.apply(_ref4, [
+(_o3_b14 = o3["b"]) === null || _o3_b14 === void 0 ? void 0 : _o3_b14.call(o3).c;
+(_o3_b15 = o3["b"]) === null || _o3_b15 === void 0 ? void 0 : _o3_b15.call(o3, 1).c;
+(_o3_b16 = o3["b"]) === null || _o3_b16 === void 0 ? void 0 : (_o3_b4 = _o3_b16).call.apply(_o3_b4, [
     o3,
     1,
     2
 ]).c;
-(ref11 = o3["b"]) === null || ref11 === void 0 ? void 0 : (_ref5 = ref11).call.apply(_ref5, [
+(_o3_b17 = o3["b"]) === null || _o3_b17 === void 0 ? void 0 : (_o3_b5 = _o3_b17).call.apply(_o3_b5, [
     o3,
     1,
     2,
@@ -80,7 +80,7 @@ o2 === null || o2 === void 0 ? void 0 : (_o23 = o2)["b"].apply(_o23, [
     4
 ]).c;
 var v = o4 === null || o4 === void 0 ? void 0 : o4(incr);
-(ref12 = o5()) === null || ref12 === void 0 ? void 0 : ref12();
+(_o5 = o5()) === null || _o5 === void 0 ? void 0 : _o5();
 // GH#36031
 o2 === null || o2 === void 0 ? void 0 : o2.b().toString;
 o2 === null || o2 === void 0 ? void 0 : o2.b().toString;
diff --git a/crates/swc/tests/tsc-references/callChain.2.1.normal.js b/crates/swc/tests/tsc-references/callChain.2.1.normal.js
index 44a71508997a..3bbc5c0421f8 100644
--- a/crates/swc/tests/tsc-references/callChain.2.1.normal.js
+++ b/crates/swc/tests/tsc-references/callChain.2.1.normal.js
@@ -1,5 +1,5 @@
 //// [callChain.2.ts]
-var ref;
+var _o3_b;
 o1 === null || o1 === void 0 ? void 0 : o1();
 o2 === null || o2 === void 0 ? void 0 : o2.b();
-(ref = o3.b) === null || ref === void 0 ? void 0 : ref.call(o3).c;
+(_o3_b = o3.b) === null || _o3_b === void 0 ? void 0 : _o3_b.call(o3).c;
diff --git a/crates/swc/tests/tsc-references/callChain.2.2.minified.js b/crates/swc/tests/tsc-references/callChain.2.2.minified.js
index ded3e7775c97..f6718e2799c7 100644
--- a/crates/swc/tests/tsc-references/callChain.2.2.minified.js
+++ b/crates/swc/tests/tsc-references/callChain.2.2.minified.js
@@ -1,3 +1,3 @@
 //// [callChain.2.ts]
-var ref;
-null == o1 || o1(), null == o2 || o2.b(), null === (ref = o3.b) || void 0 === ref || ref.call(o3).c;
+var _o3_b;
+null == o1 || o1(), null == o2 || o2.b(), null === (_o3_b = o3.b) || void 0 === _o3_b || _o3_b.call(o3).c;
diff --git a/crates/swc/tests/tsc-references/callChain.2.minified.js b/crates/swc/tests/tsc-references/callChain.2.minified.js
index 5d1edc21cbcb..df0350c87759 100644
--- a/crates/swc/tests/tsc-references/callChain.2.minified.js
+++ b/crates/swc/tests/tsc-references/callChain.2.minified.js
@@ -1,5 +1,5 @@
 //// [callChain.ts]
-var _o2, _o21, _o22, _o23, ref, ref1, ref2, ref3, ref4, ref5, ref6, ref7, ref8, ref9, ref10, ref11, ref12;
+var _o2, _o21, _o22, _o23, _o3_b, _o3_b1, _o3_b2, _o3_b3, _o3_b4, _o3_b5, _o3_b6, _o3_b7, _o3_b8, _o3_b9, _o3_b10, _o3_b11, _o5;
 null == o1 || o1(), null == o1 || o1(1), null == o1 || o1.apply(void 0, [
     1,
     2
@@ -24,34 +24,34 @@ null == o1 || o1(), null == o1 || o1(1), null == o1 || o1.apply(void 0, [
     2,
     3,
     4
-]), null === (ref = o3.b) || void 0 === ref || ref.call(o3).c, null === (ref1 = o3.b) || void 0 === ref1 || ref1.call(o3, 1).c, null === (ref2 = o3.b) || void 0 === ref2 || ref2.call.apply(ref2, [
+]), null === (_o3_b = o3.b) || void 0 === _o3_b || _o3_b.call(o3).c, null === (_o3_b1 = o3.b) || void 0 === _o3_b1 || _o3_b1.call(o3, 1).c, null === (_o3_b2 = o3.b) || void 0 === _o3_b2 || _o3_b2.call.apply(_o3_b2, [
     o3,
     1,
     2
-]).c, null === (ref3 = o3.b) || void 0 === ref3 || ref3.call.apply(ref3, [
+]).c, null === (_o3_b3 = o3.b) || void 0 === _o3_b3 || _o3_b3.call.apply(_o3_b3, [
     o3,
     1,
     2,
     3,
     4
-]).c, null === (ref4 = o3.b) || void 0 === ref4 || ref4.call(o3).c, null === (ref5 = o3.b) || void 0 === ref5 || ref5.call(o3, 1).c, null === (ref6 = o3.b) || void 0 === ref6 || ref6.call.apply(ref6, [
+]).c, null === (_o3_b4 = o3.b) || void 0 === _o3_b4 || _o3_b4.call(o3).c, null === (_o3_b5 = o3.b) || void 0 === _o3_b5 || _o3_b5.call(o3, 1).c, null === (_o3_b6 = o3.b) || void 0 === _o3_b6 || _o3_b6.call.apply(_o3_b6, [
     o3,
     1,
     2
-]).c, null === (ref7 = o3.b) || void 0 === ref7 || ref7.call.apply(ref7, [
+]).c, null === (_o3_b7 = o3.b) || void 0 === _o3_b7 || _o3_b7.call.apply(_o3_b7, [
     o3,
     1,
     2,
     3,
     4
-]).c, null === (ref8 = o3.b) || void 0 === ref8 || ref8.call(o3).c, null === (ref9 = o3.b) || void 0 === ref9 || ref9.call(o3, 1).c, null === (ref10 = o3.b) || void 0 === ref10 || ref10.call.apply(ref10, [
+]).c, null === (_o3_b8 = o3.b) || void 0 === _o3_b8 || _o3_b8.call(o3).c, null === (_o3_b9 = o3.b) || void 0 === _o3_b9 || _o3_b9.call(o3, 1).c, null === (_o3_b10 = o3.b) || void 0 === _o3_b10 || _o3_b10.call.apply(_o3_b10, [
     o3,
     1,
     2
-]).c, null === (ref11 = o3.b) || void 0 === ref11 || ref11.call.apply(ref11, [
+]).c, null === (_o3_b11 = o3.b) || void 0 === _o3_b11 || _o3_b11.call.apply(_o3_b11, [
     o3,
     1,
     2,
     3,
     4
-]).c, null == o4 || o4(incr), null === (ref12 = o5()) || void 0 === ref12 || ref12(), null == o2 || o2.b().toString, null == o2 || o2.b().toString;
+]).c, null == o4 || o4(incr), null === (_o5 = o5()) || void 0 === _o5 || _o5(), null == o2 || o2.b().toString, null == o2 || o2.b().toString;
diff --git a/crates/swc/tests/tsc-references/callChain.3.1.normal.js b/crates/swc/tests/tsc-references/callChain.3.1.normal.js
index f31360481c8c..c8e1c745cc2d 100644
--- a/crates/swc/tests/tsc-references/callChain.3.1.normal.js
+++ b/crates/swc/tests/tsc-references/callChain.3.1.normal.js
@@ -1,19 +1,19 @@
 //// [callChain.3.ts]
-var ref, ref1, ref2, ref3, ref4;
-var n1 = a === null || a === void 0 ? void 0 : (ref = a.m) === null || ref === void 0 ? void 0 : ref.call(a, {
+var _a_m, _a_m1, _a_m2, _a_m3, _a_m4;
+var n1 = a === null || a === void 0 ? void 0 : (_a_m = a.m) === null || _a_m === void 0 ? void 0 : _a_m.call(a, {
     x: 12
 }); // should be an error (`undefined` is not assignable to `number`)
-var n2 = a === null || a === void 0 ? void 0 : (ref1 = a.m) === null || ref1 === void 0 ? void 0 : ref1.call(a, {
+var n2 = a === null || a === void 0 ? void 0 : (_a_m1 = a.m) === null || _a_m1 === void 0 ? void 0 : _a_m1.call(a, {
     x: absorb()
 }); // likewise
-var n3 = a === null || a === void 0 ? void 0 : (ref2 = a.m) === null || ref2 === void 0 ? void 0 : ref2.call(a, {
+var n3 = a === null || a === void 0 ? void 0 : (_a_m2 = a.m) === null || _a_m2 === void 0 ? void 0 : _a_m2.call(a, {
     x: 12
 }); // should be ok
-var n4 = a === null || a === void 0 ? void 0 : (ref3 = a.m) === null || ref3 === void 0 ? void 0 : ref3.call(a, {
+var n4 = a === null || a === void 0 ? void 0 : (_a_m3 = a.m) === null || _a_m3 === void 0 ? void 0 : _a_m3.call(a, {
     x: absorb()
 }); // likewise
 // Also a test showing `!` vs `?` for good measure
-var t1 = a === null || a === void 0 ? void 0 : (ref4 = a.m) === null || ref4 === void 0 ? void 0 : ref4.call(a, {
+var t1 = a === null || a === void 0 ? void 0 : (_a_m4 = a.m) === null || _a_m4 === void 0 ? void 0 : _a_m4.call(a, {
     x: 12
 });
 t1 = a.m({
diff --git a/crates/swc/tests/tsc-references/callChain.3.2.minified.js b/crates/swc/tests/tsc-references/callChain.3.2.minified.js
index 2f26f8114f5c..b2640d160227 100644
--- a/crates/swc/tests/tsc-references/callChain.3.2.minified.js
+++ b/crates/swc/tests/tsc-references/callChain.3.2.minified.js
@@ -1,14 +1,14 @@
 //// [callChain.3.ts]
-var ref, ref1, ref2, ref3, ref4;
-null == a || null === (ref = a.m) || void 0 === ref || ref.call(a, {
+var _a_m, _a_m1, _a_m2, _a_m3, _a_m4;
+null == a || null === (_a_m = a.m) || void 0 === _a_m || _a_m.call(a, {
     x: 12
-}), null == a || null === (ref1 = a.m) || void 0 === ref1 || ref1.call(a, {
+}), null == a || null === (_a_m1 = a.m) || void 0 === _a_m1 || _a_m1.call(a, {
     x: absorb()
-}), null == a || null === (ref2 = a.m) || void 0 === ref2 || ref2.call(a, {
+}), null == a || null === (_a_m2 = a.m) || void 0 === _a_m2 || _a_m2.call(a, {
     x: 12
-}), null == a || null === (ref3 = a.m) || void 0 === ref3 || ref3.call(a, {
+}), null == a || null === (_a_m3 = a.m) || void 0 === _a_m3 || _a_m3.call(a, {
     x: absorb()
-}), null == a || null === (ref4 = a.m) || void 0 === ref4 || ref4.call(a, {
+}), null == a || null === (_a_m4 = a.m) || void 0 === _a_m4 || _a_m4.call(a, {
     x: 12
 }), a.m({
     x: 12
diff --git a/crates/swc/tests/tsc-references/callChainWithSuper(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/callChainWithSuper(target=es2015).1.normal.js
index bed7b9c70b63..c2c6ba7e81ab 100644
--- a/crates/swc/tests/tsc-references/callChainWithSuper(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/callChainWithSuper(target=es2015).1.normal.js
@@ -5,11 +5,11 @@ class Base {
 }
 class Derived extends Base {
     method1() {
-        var ref;
-        return (ref = super.method) === null || ref === void 0 ? void 0 : ref.call(this);
+        var _super_method;
+        return (_super_method = super.method) === null || _super_method === void 0 ? void 0 : _super_method.call(this);
     }
     method2() {
-        var ref;
-        return (ref = super["method"]) === null || ref === void 0 ? void 0 : ref.call(this);
+        var _super_method;
+        return (_super_method = super["method"]) === null || _super_method === void 0 ? void 0 : _super_method.call(this);
     }
 }
diff --git a/crates/swc/tests/tsc-references/callChainWithSuper(target=es2016).1.normal.js b/crates/swc/tests/tsc-references/callChainWithSuper(target=es2016).1.normal.js
index bed7b9c70b63..c2c6ba7e81ab 100644
--- a/crates/swc/tests/tsc-references/callChainWithSuper(target=es2016).1.normal.js
+++ b/crates/swc/tests/tsc-references/callChainWithSuper(target=es2016).1.normal.js
@@ -5,11 +5,11 @@ class Base {
 }
 class Derived extends Base {
     method1() {
-        var ref;
-        return (ref = super.method) === null || ref === void 0 ? void 0 : ref.call(this);
+        var _super_method;
+        return (_super_method = super.method) === null || _super_method === void 0 ? void 0 : _super_method.call(this);
     }
     method2() {
-        var ref;
-        return (ref = super["method"]) === null || ref === void 0 ? void 0 : ref.call(this);
+        var _super_method;
+        return (_super_method = super["method"]) === null || _super_method === void 0 ? void 0 : _super_method.call(this);
     }
 }
diff --git a/crates/swc/tests/tsc-references/callChainWithSuper(target=es2017).1.normal.js b/crates/swc/tests/tsc-references/callChainWithSuper(target=es2017).1.normal.js
index bed7b9c70b63..c2c6ba7e81ab 100644
--- a/crates/swc/tests/tsc-references/callChainWithSuper(target=es2017).1.normal.js
+++ b/crates/swc/tests/tsc-references/callChainWithSuper(target=es2017).1.normal.js
@@ -5,11 +5,11 @@ class Base {
 }
 class Derived extends Base {
     method1() {
-        var ref;
-        return (ref = super.method) === null || ref === void 0 ? void 0 : ref.call(this);
+        var _super_method;
+        return (_super_method = super.method) === null || _super_method === void 0 ? void 0 : _super_method.call(this);
     }
     method2() {
-        var ref;
-        return (ref = super["method"]) === null || ref === void 0 ? void 0 : ref.call(this);
+        var _super_method;
+        return (_super_method = super["method"]) === null || _super_method === void 0 ? void 0 : _super_method.call(this);
     }
 }
diff --git a/crates/swc/tests/tsc-references/callChainWithSuper(target=es2018).1.normal.js b/crates/swc/tests/tsc-references/callChainWithSuper(target=es2018).1.normal.js
index bed7b9c70b63..c2c6ba7e81ab 100644
--- a/crates/swc/tests/tsc-references/callChainWithSuper(target=es2018).1.normal.js
+++ b/crates/swc/tests/tsc-references/callChainWithSuper(target=es2018).1.normal.js
@@ -5,11 +5,11 @@ class Base {
 }
 class Derived extends Base {
     method1() {
-        var ref;
-        return (ref = super.method) === null || ref === void 0 ? void 0 : ref.call(this);
+        var _super_method;
+        return (_super_method = super.method) === null || _super_method === void 0 ? void 0 : _super_method.call(this);
     }
     method2() {
-        var ref;
-        return (ref = super["method"]) === null || ref === void 0 ? void 0 : ref.call(this);
+        var _super_method;
+        return (_super_method = super["method"]) === null || _super_method === void 0 ? void 0 : _super_method.call(this);
     }
 }
diff --git a/crates/swc/tests/tsc-references/callChainWithSuper(target=es2019).1.normal.js b/crates/swc/tests/tsc-references/callChainWithSuper(target=es2019).1.normal.js
index bed7b9c70b63..c2c6ba7e81ab 100644
--- a/crates/swc/tests/tsc-references/callChainWithSuper(target=es2019).1.normal.js
+++ b/crates/swc/tests/tsc-references/callChainWithSuper(target=es2019).1.normal.js
@@ -5,11 +5,11 @@ class Base {
 }
 class Derived extends Base {
     method1() {
-        var ref;
-        return (ref = super.method) === null || ref === void 0 ? void 0 : ref.call(this);
+        var _super_method;
+        return (_super_method = super.method) === null || _super_method === void 0 ? void 0 : _super_method.call(this);
     }
     method2() {
-        var ref;
-        return (ref = super["method"]) === null || ref === void 0 ? void 0 : ref.call(this);
+        var _super_method;
+        return (_super_method = super["method"]) === null || _super_method === void 0 ? void 0 : _super_method.call(this);
     }
 }
diff --git a/crates/swc/tests/tsc-references/callChainWithSuper(target=es5).1.normal.js b/crates/swc/tests/tsc-references/callChainWithSuper(target=es5).1.normal.js
index ba2b399197e1..61ac235e6eb2 100644
--- a/crates/swc/tests/tsc-references/callChainWithSuper(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/callChainWithSuper(target=es5).1.normal.js
@@ -24,12 +24,12 @@ var Derived = /*#__PURE__*/ function(Base) {
     }
     var _proto = Derived.prototype;
     _proto.method1 = function method1() {
-        var ref;
-        return (ref = _get(_get_prototype_of(Derived.prototype), "method", this)) === null || ref === void 0 ? void 0 : ref.call(this);
+        var _super_method;
+        return (_super_method = _get(_get_prototype_of(Derived.prototype), "method", this)) === null || _super_method === void 0 ? void 0 : _super_method.call(this);
     };
     _proto.method2 = function method2() {
-        var ref;
-        return (ref = _get(_get_prototype_of(Derived.prototype), "method", this)) === null || ref === void 0 ? void 0 : ref.call(this);
+        var _super_method;
+        return (_super_method = _get(_get_prototype_of(Derived.prototype), "method", this)) === null || _super_method === void 0 ? void 0 : _super_method.call(this);
     };
     return Derived;
 }(Base);
diff --git a/crates/swc/tests/tsc-references/callWithSpread.1.normal.js b/crates/swc/tests/tsc-references/callWithSpread.1.normal.js
index d776f588d2af..f3a7da00fe9c 100644
--- a/crates/swc/tests/tsc-references/callWithSpread.1.normal.js
+++ b/crates/swc/tests/tsc-references/callWithSpread.1.normal.js
@@ -5,7 +5,7 @@ import _get_prototype_of from "@swc/helpers/src/_get_prototype_of.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _to_consumable_array from "@swc/helpers/src/_to_consumable_array.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
-var _obj, _obj1, _obj2, _obj3, _instance, _obj4, _instance1, _obj5, _obj6, _obj7, _obj8, _instance2, _obj9, _instance3, _instance4, _instance5, _instance6;
+var _obj, _obj1, _obj2, _obj3, _foo_apply, _obj4, _foo_apply1, _obj5, _obj6, _obj7, _obj8, _foo_apply2, _obj9, _foo_apply3, _xa_, _xa_1, _xa_2;
 function foo(x, y) {
     for(var _len = arguments.length, z = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++){
         z[_key - 2] = arguments[_key];
@@ -41,17 +41,17 @@ obj.foo(1, 2, "abc");
     1,
     2
 ].concat(_to_consumable_array(a))).foo(1, 2, "abc");
-(_instance = (_obj3 = obj).foo.apply(_obj3, [
+(_foo_apply = (_obj3 = obj).foo.apply(_obj3, [
     1,
     2
-].concat(_to_consumable_array(a)))).foo.apply(_instance, [
+].concat(_to_consumable_array(a)))).foo.apply(_foo_apply, [
     1,
     2
 ].concat(_to_consumable_array(a)));
-(_instance1 = (_obj4 = obj).foo.apply(_obj4, [
+(_foo_apply1 = (_obj4 = obj).foo.apply(_obj4, [
     1,
     2
-].concat(_to_consumable_array(a)))).foo.apply(_instance1, [
+].concat(_to_consumable_array(a)))).foo.apply(_foo_apply1, [
     1,
     2
 ].concat(_to_consumable_array(a), [
@@ -72,34 +72,34 @@ obj.foo(1, 2, "abc");
     1,
     2
 ].concat(_to_consumable_array(a))).foo(1, 2, "abc");
-(_instance2 = (_obj8 = obj).foo.apply(_obj8, [
+(_foo_apply2 = (_obj8 = obj).foo.apply(_obj8, [
     1,
     2
-].concat(_to_consumable_array(a)))).foo.apply(_instance2, [
+].concat(_to_consumable_array(a)))).foo.apply(_foo_apply2, [
     1,
     2
 ].concat(_to_consumable_array(a)));
-(_instance3 = (_obj9 = obj).foo.apply(_obj9, [
+(_foo_apply3 = (_obj9 = obj).foo.apply(_obj9, [
     1,
     2
-].concat(_to_consumable_array(a)))).foo.apply(_instance3, [
+].concat(_to_consumable_array(a)))).foo.apply(_foo_apply3, [
     1,
     2
 ].concat(_to_consumable_array(a), [
     "abc"
 ]));
 xa[1].foo(1, 2, "abc");
-(_instance4 = xa[1]).foo.apply(_instance4, [
+(_xa_ = xa[1]).foo.apply(_xa_, [
     1,
     2
 ].concat(_to_consumable_array(a)));
-(_instance5 = xa[1]).foo.apply(_instance5, [
+(_xa_1 = xa[1]).foo.apply(_xa_1, [
     1,
     2
 ].concat(_to_consumable_array(a), [
     "abc"
 ]));
-(_instance6 = xa[1]).foo.apply(_instance6, [
+(_xa_2 = xa[1]).foo.apply(_xa_2, [
     1,
     2,
     "abc"
@@ -140,9 +140,9 @@ var D = /*#__PURE__*/ function(C) {
     }
     var _proto = D.prototype;
     _proto.foo = function foo() {
-        var _instance;
+        var _$_get;
         _get(_get_prototype_of(D.prototype), "foo", this).call(this, 1, 2);
-        (_instance = _get(_get_prototype_of(D.prototype), "foo", this)).call.apply(_instance, [
+        (_$_get = _get(_get_prototype_of(D.prototype), "foo", this)).call.apply(_$_get, [
             this,
             1,
             2
diff --git a/crates/swc/tests/tsc-references/callWithSpread.2.minified.js b/crates/swc/tests/tsc-references/callWithSpread.2.minified.js
index 38531c1d719e..d18bc18b3fcc 100644
--- a/crates/swc/tests/tsc-references/callWithSpread.2.minified.js
+++ b/crates/swc/tests/tsc-references/callWithSpread.2.minified.js
@@ -1,5 +1,5 @@
 //// [callWithSpread.ts]
-var _instance, _instance1, _instance2, _instance3, _instance4, _instance5, _instance6, a, obj, xa;
+var _foo_apply, _foo_apply1, _foo_apply2, _foo_apply3, _xa_, _xa_1, _xa_2, a, obj, xa;
 import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _get from "@swc/helpers/src/_get.mjs";
 import _get_prototype_of from "@swc/helpers/src/_get_prototype_of.mjs";
@@ -28,16 +28,16 @@ foo(1, 2, "abc"), foo.apply(void 0, [
 ])), obj.foo.apply(obj, [
     1,
     2
-].concat(_to_consumable_array(a))).foo(1, 2, "abc"), (_instance = obj.foo.apply(obj, [
+].concat(_to_consumable_array(a))).foo(1, 2, "abc"), (_foo_apply = obj.foo.apply(obj, [
     1,
     2
-].concat(_to_consumable_array(a)))).foo.apply(_instance, [
+].concat(_to_consumable_array(a)))).foo.apply(_foo_apply, [
     1,
     2
-].concat(_to_consumable_array(a))), (_instance1 = obj.foo.apply(obj, [
+].concat(_to_consumable_array(a))), (_foo_apply1 = obj.foo.apply(obj, [
     1,
     2
-].concat(_to_consumable_array(a)))).foo.apply(_instance1, [
+].concat(_to_consumable_array(a)))).foo.apply(_foo_apply1, [
     1,
     2
 ].concat(_to_consumable_array(a), [
@@ -53,29 +53,29 @@ foo(1, 2, "abc"), foo.apply(void 0, [
 ])), obj.foo.apply(obj, [
     1,
     2
-].concat(_to_consumable_array(a))).foo(1, 2, "abc"), (_instance2 = obj.foo.apply(obj, [
+].concat(_to_consumable_array(a))).foo(1, 2, "abc"), (_foo_apply2 = obj.foo.apply(obj, [
     1,
     2
-].concat(_to_consumable_array(a)))).foo.apply(_instance2, [
+].concat(_to_consumable_array(a)))).foo.apply(_foo_apply2, [
     1,
     2
-].concat(_to_consumable_array(a))), (_instance3 = obj.foo.apply(obj, [
+].concat(_to_consumable_array(a))), (_foo_apply3 = obj.foo.apply(obj, [
     1,
     2
-].concat(_to_consumable_array(a)))).foo.apply(_instance3, [
+].concat(_to_consumable_array(a)))).foo.apply(_foo_apply3, [
     1,
     2
 ].concat(_to_consumable_array(a), [
     "abc"
-])), xa[1].foo(1, 2, "abc"), (_instance4 = xa[1]).foo.apply(_instance4, [
+])), xa[1].foo(1, 2, "abc"), (_xa_ = xa[1]).foo.apply(_xa_, [
     1,
     2
-].concat(_to_consumable_array(a))), (_instance5 = xa[1]).foo.apply(_instance5, [
+].concat(_to_consumable_array(a))), (_xa_1 = xa[1]).foo.apply(_xa_1, [
     1,
     2
 ].concat(_to_consumable_array(a), [
     "abc"
-])), (_instance6 = xa[1]).foo.apply(_instance6, [
+])), (_xa_2 = xa[1]).foo.apply(_xa_2, [
     1,
     2,
     "abc"
diff --git a/crates/swc/tests/tsc-references/checkJsxChildrenCanBeTupleType.1.normal.js b/crates/swc/tests/tsc-references/checkJsxChildrenCanBeTupleType.1.normal.js
index 6e6a0b4df4ab..efc678b0ffc9 100644
--- a/crates/swc/tests/tsc-references/checkJsxChildrenCanBeTupleType.1.normal.js
+++ b/crates/swc/tests/tsc-references/checkJsxChildrenCanBeTupleType.1.normal.js
@@ -4,9 +4,9 @@ import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
 import React from "react";
-var ResizablePanel = /*#__PURE__*/ function(_Component) {
+var ResizablePanel = /*#__PURE__*/ function(_React_Component) {
     "use strict";
-    _inherits(ResizablePanel, _Component);
+    _inherits(ResizablePanel, _React_Component);
     var _super = _create_super(ResizablePanel);
     function ResizablePanel() {
         _class_call_check(this, ResizablePanel);
diff --git a/crates/swc/tests/tsc-references/checkJsxSubtleSkipContextSensitiveBug.1.normal.js b/crates/swc/tests/tsc-references/checkJsxSubtleSkipContextSensitiveBug.1.normal.js
index cc64fb597a3b..1e4ae1e29083 100644
--- a/crates/swc/tests/tsc-references/checkJsxSubtleSkipContextSensitiveBug.1.normal.js
+++ b/crates/swc/tests/tsc-references/checkJsxSubtleSkipContextSensitiveBug.1.normal.js
@@ -6,9 +6,9 @@ import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
 import _ts_generator from "@swc/helpers/src/_ts_generator.mjs";
 import * as React from "react";
-var AsyncLoader = /*#__PURE__*/ function(_Component) {
+var AsyncLoader = /*#__PURE__*/ function(_React_Component) {
     "use strict";
-    _inherits(AsyncLoader, _Component);
+    _inherits(AsyncLoader, _React_Component);
     var _super = _create_super(AsyncLoader);
     function AsyncLoader() {
         _class_call_check(this, AsyncLoader);
diff --git a/crates/swc/tests/tsc-references/circularImportAlias.1.normal.js b/crates/swc/tests/tsc-references/circularImportAlias.1.normal.js
index 1e66f97b9679..b28ef28cea2c 100644
--- a/crates/swc/tests/tsc-references/circularImportAlias.1.normal.js
+++ b/crates/swc/tests/tsc-references/circularImportAlias.1.normal.js
@@ -7,9 +7,9 @@ var B;
 (function(B) {
     var a = A;
     B.a = a;
-    var D = /*#__PURE__*/ function(_C) {
+    var D = /*#__PURE__*/ function(_a_C) {
         "use strict";
-        _inherits(D, _C);
+        _inherits(D, _a_C);
         var _super = _create_super(D);
         function D() {
             _class_call_check(this, D);
diff --git a/crates/swc/tests/tsc-references/circularImportAlias.2.minified.js b/crates/swc/tests/tsc-references/circularImportAlias.2.minified.js
index 51c4f569c1f1..fd98f48b9df2 100644
--- a/crates/swc/tests/tsc-references/circularImportAlias.2.minified.js
+++ b/crates/swc/tests/tsc-references/circularImportAlias.2.minified.js
@@ -6,9 +6,9 @@ import _create_super from "@swc/helpers/src/_create_super.mjs";
 !function(B) {
     var a = A;
     B.a = a;
-    var D = function(_C) {
+    var D = function(_a_C) {
         "use strict";
-        _inherits(D, _C);
+        _inherits(D, _a_C);
         var _super = _create_super(D);
         function D() {
             return _class_call_check(this, D), _super.apply(this, arguments);
diff --git a/crates/swc/tests/tsc-references/classExtendingClassLikeType.1.normal.js b/crates/swc/tests/tsc-references/classExtendingClassLikeType.1.normal.js
index 36640cb0454e..77f3eba7a3ec 100644
--- a/crates/swc/tests/tsc-references/classExtendingClassLikeType.1.normal.js
+++ b/crates/swc/tests/tsc-references/classExtendingClassLikeType.1.normal.js
@@ -13,9 +13,9 @@ var D0 = /*#__PURE__*/ function(Base1) {
     }
     return D0;
 }(Base);
-var D1 = /*#__PURE__*/ function(_superClass) {
+var D1 = /*#__PURE__*/ function(_getBase) {
     "use strict";
-    _inherits(D1, _superClass);
+    _inherits(D1, _getBase);
     var _super = _create_super(D1);
     function D1() {
         _class_call_check(this, D1);
@@ -27,9 +27,9 @@ var D1 = /*#__PURE__*/ function(_superClass) {
     }
     return D1;
 }(getBase());
-var D2 = /*#__PURE__*/ function(_superClass) {
+var D2 = /*#__PURE__*/ function(_getBase) {
     "use strict";
-    _inherits(D2, _superClass);
+    _inherits(D2, _getBase);
     var _super = _create_super(D2);
     function D2() {
         _class_call_check(this, D2);
@@ -42,9 +42,9 @@ var D2 = /*#__PURE__*/ function(_superClass) {
     }
     return D2;
 }(getBase());
-var D3 = /*#__PURE__*/ function(_superClass) {
+var D3 = /*#__PURE__*/ function(_getBase) {
     "use strict";
-    _inherits(D3, _superClass);
+    _inherits(D3, _getBase);
     var _super = _create_super(D3);
     function D3() {
         _class_call_check(this, D3);
@@ -57,9 +57,9 @@ var D3 = /*#__PURE__*/ function(_superClass) {
     return D3;
 }(getBase());
 // Error, no constructors with three type arguments
-var D4 = /*#__PURE__*/ function(_superClass) {
+var D4 = /*#__PURE__*/ function(_getBase) {
     "use strict";
-    _inherits(D4, _superClass);
+    _inherits(D4, _getBase);
     var _super = _create_super(D4);
     function D4() {
         _class_call_check(this, D4);
@@ -68,9 +68,9 @@ var D4 = /*#__PURE__*/ function(_superClass) {
     return D4;
 }(getBase());
 // Error, constructor return types differ
-var D5 = /*#__PURE__*/ function(_superClass) {
+var D5 = /*#__PURE__*/ function(_getBadBase) {
     "use strict";
-    _inherits(D5, _superClass);
+    _inherits(D5, _getBadBase);
     var _super = _create_super(D5);
     function D5() {
         _class_call_check(this, D5);
diff --git a/crates/swc/tests/tsc-references/classExtendingNonConstructor.1.normal.js b/crates/swc/tests/tsc-references/classExtendingNonConstructor.1.normal.js
index eca4c31dd28e..904c6e5e1abe 100644
--- a/crates/swc/tests/tsc-references/classExtendingNonConstructor.1.normal.js
+++ b/crates/swc/tests/tsc-references/classExtendingNonConstructor.1.normal.js
@@ -46,9 +46,9 @@ var C4 = /*#__PURE__*/ function(_superClass) {
     }
     return C4;
 }(42);
-var C5 = /*#__PURE__*/ function(_superClass) {
+var C5 = /*#__PURE__*/ function(_hello) {
     "use strict";
-    _inherits(C5, _superClass);
+    _inherits(C5, _hello);
     var _super = _create_super(C5);
     function C5() {
         _class_call_check(this, C5);
diff --git a/crates/swc/tests/tsc-references/classExtendsItselfIndirectly2.1.normal.js b/crates/swc/tests/tsc-references/classExtendsItselfIndirectly2.1.normal.js
index 8c195cc64de7..b96f60e4657b 100644
--- a/crates/swc/tests/tsc-references/classExtendsItselfIndirectly2.1.normal.js
+++ b/crates/swc/tests/tsc-references/classExtendsItselfIndirectly2.1.normal.js
@@ -2,9 +2,9 @@
 import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
-var C = /*#__PURE__*/ function(_E) {
+var C = /*#__PURE__*/ function(_N_E) {
     "use strict";
-    _inherits(C, _E);
+    _inherits(C, _N_E);
     var _super = _create_super(C);
     function C() {
         _class_call_check(this, C);
@@ -29,9 +29,9 @@ var M;
 })(M || (M = {}));
 var N;
 (function(N) {
-    var E = /*#__PURE__*/ function(_D) {
+    var E = /*#__PURE__*/ function(_M_D) {
         "use strict";
-        _inherits(E, _D);
+        _inherits(E, _M_D);
         var _super = _create_super(E);
         function E() {
             _class_call_check(this, E);
@@ -43,9 +43,9 @@ var N;
 })(N || (N = {}));
 var O;
 (function(O) {
-    var C2 = /*#__PURE__*/ function(_E2) {
+    var C2 = /*#__PURE__*/ function(_Q_E2) {
         "use strict";
-        _inherits(C2, _E2);
+        _inherits(C2, _Q_E2);
         var _super = _create_super(C2);
         function C2() {
             _class_call_check(this, C2);
@@ -70,9 +70,9 @@ var O;
     })(P || (P = {}));
     var Q;
     (function(Q) {
-        var E2 = /*#__PURE__*/ function(_D2) {
+        var E2 = /*#__PURE__*/ function(_P_D2) {
             "use strict";
-            _inherits(E2, _D2);
+            _inherits(E2, _P_D2);
             var _super = _create_super(E2);
             function E2() {
                 _class_call_check(this, E2);
diff --git a/crates/swc/tests/tsc-references/classExtendsItselfIndirectly2.2.minified.js b/crates/swc/tests/tsc-references/classExtendsItselfIndirectly2.2.minified.js
index 1bca648219f3..d67d63ab8b3a 100644
--- a/crates/swc/tests/tsc-references/classExtendsItselfIndirectly2.2.minified.js
+++ b/crates/swc/tests/tsc-references/classExtendsItselfIndirectly2.2.minified.js
@@ -2,9 +2,9 @@
 import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
-var M, N, O, C = function(_E) {
+var M, N, O, C = function(_N_E) {
     "use strict";
-    _inherits(C, _E);
+    _inherits(C, _N_E);
     var _super = _create_super(C);
     function C() {
         return _class_call_check(this, C), _super.apply(this, arguments);
@@ -23,9 +23,9 @@ var M, N, O, C = function(_E) {
     }(C);
     M.D = D;
 }(M || (M = {})), function(N) {
-    var E = function(_D) {
+    var E = function(_M_D) {
         "use strict";
-        _inherits(E, _D);
+        _inherits(E, _M_D);
         var _super = _create_super(E);
         function E() {
             return _class_call_check(this, E), _super.apply(this, arguments);
@@ -34,9 +34,9 @@ var M, N, O, C = function(_E) {
     }(M.D);
     N.E = E;
 }(N || (N = {})), function(O) {
-    var P, D2, Q, E2, P1, Q1, C2 = function(_E2) {
+    var P, D2, Q, E2, P1, Q1, C2 = function(_Q_E2) {
         "use strict";
-        _inherits(C2, _E2);
+        _inherits(C2, _Q_E2);
         var _super = _create_super(C2);
         function C2() {
             return _class_call_check(this, C2), _super.apply(this, arguments);
@@ -51,9 +51,9 @@ var M, N, O, C = function(_E) {
             return _class_call_check(this, D2), _super.apply(this, arguments);
         }
         return D2;
-    }(C2), P.D2 = D2, Q = Q1 || (Q1 = {}), E2 = function(_D2) {
+    }(C2), P.D2 = D2, Q = Q1 || (Q1 = {}), E2 = function(_P_D2) {
         "use strict";
-        _inherits(E2, _D2);
+        _inherits(E2, _P_D2);
         var _super = _create_super(E2);
         function E2() {
             return _class_call_check(this, E2), _super.apply(this, arguments);
diff --git a/crates/swc/tests/tsc-references/computedPropertyNames24_ES5.1.normal.js b/crates/swc/tests/tsc-references/computedPropertyNames24_ES5.1.normal.js
index 735217ba4e17..1605f18cb678 100644
--- a/crates/swc/tests/tsc-references/computedPropertyNames24_ES5.1.normal.js
+++ b/crates/swc/tests/tsc-references/computedPropertyNames24_ES5.1.normal.js
@@ -13,7 +13,7 @@ var Base = /*#__PURE__*/ function() {
     };
     return Base;
 }();
-var tmp = super.bar();
+var _super_bar = super.bar();
 var C = /*#__PURE__*/ function(Base) {
     "use strict";
     _inherits(C, Base);
@@ -23,6 +23,6 @@ var C = /*#__PURE__*/ function(Base) {
         return _super.apply(this, arguments);
     }
     var _proto = C.prototype;
-    _proto[tmp] = function() {};
+    _proto[_super_bar] = function() {};
     return C;
 }(Base);
diff --git a/crates/swc/tests/tsc-references/computedPropertyNames24_ES6.1.normal.js b/crates/swc/tests/tsc-references/computedPropertyNames24_ES6.1.normal.js
index 9eb86a26dc27..fa9fb6be3193 100644
--- a/crates/swc/tests/tsc-references/computedPropertyNames24_ES6.1.normal.js
+++ b/crates/swc/tests/tsc-references/computedPropertyNames24_ES6.1.normal.js
@@ -4,9 +4,9 @@ class Base {
         return 0;
     }
 }
-let tmp = super.bar();
+let _super_bar = super.bar();
 class C extends Base {
     // Gets emitted as super, not _super, which is consistent with
     // use of super in static properties initializers.
-    [tmp]() {}
+    [_super_bar]() {}
 }
diff --git a/crates/swc/tests/tsc-references/computedPropertyNames26_ES5.1.normal.js b/crates/swc/tests/tsc-references/computedPropertyNames26_ES5.1.normal.js
index ad7781a7b634..13bafec9309c 100644
--- a/crates/swc/tests/tsc-references/computedPropertyNames26_ES5.1.normal.js
+++ b/crates/swc/tests/tsc-references/computedPropertyNames26_ES5.1.normal.js
@@ -14,7 +14,7 @@ var Base = /*#__PURE__*/ function() {
     };
     return Base;
 }();
-var tmp = _define_property({}, super.bar(), 1)[0];
+var _ = _define_property({}, super.bar(), 1)[0];
 var C = /*#__PURE__*/ function(Base) {
     "use strict";
     _inherits(C, Base);
@@ -24,6 +24,6 @@ var C = /*#__PURE__*/ function(Base) {
         return _super.apply(this, arguments);
     }
     var _proto = C.prototype;
-    _proto[tmp] = function() {};
+    _proto[_] = function() {};
     return C;
 }(Base);
diff --git a/crates/swc/tests/tsc-references/computedPropertyNames26_ES6.1.normal.js b/crates/swc/tests/tsc-references/computedPropertyNames26_ES6.1.normal.js
index 3732c3107e94..abd4f9580352 100644
--- a/crates/swc/tests/tsc-references/computedPropertyNames26_ES6.1.normal.js
+++ b/crates/swc/tests/tsc-references/computedPropertyNames26_ES6.1.normal.js
@@ -4,11 +4,11 @@ class Base {
         return 0;
     }
 }
-let tmp = {
+let _ = {
     [super.bar()]: 1
 }[0];
 class C extends Base {
     // Gets emitted as super, not _super, which is consistent with
     // use of super in static properties initializers.
-    [tmp]() {}
+    [_]() {}
 }
diff --git a/crates/swc/tests/tsc-references/computedPropertyNames27_ES5.1.normal.js b/crates/swc/tests/tsc-references/computedPropertyNames27_ES5.1.normal.js
index 91673d68df57..e9e36a3dc927 100644
--- a/crates/swc/tests/tsc-references/computedPropertyNames27_ES5.1.normal.js
+++ b/crates/swc/tests/tsc-references/computedPropertyNames27_ES5.1.normal.js
@@ -6,7 +6,7 @@ var Base = function Base() {
     "use strict";
     _class_call_check(this, Base);
 };
-var tmp = (super(), "prop");
+var _tmp = (super(), "prop");
 var C = /*#__PURE__*/ function(Base) {
     "use strict";
     _inherits(C, Base);
@@ -16,6 +16,6 @@ var C = /*#__PURE__*/ function(Base) {
         return _super.apply(this, arguments);
     }
     var _proto = C.prototype;
-    _proto[tmp] = function() {};
+    _proto[_tmp] = function() {};
     return C;
 }(Base);
diff --git a/crates/swc/tests/tsc-references/computedPropertyNames27_ES6.1.normal.js b/crates/swc/tests/tsc-references/computedPropertyNames27_ES6.1.normal.js
index 626fb37eae9b..6ab20e84d70a 100644
--- a/crates/swc/tests/tsc-references/computedPropertyNames27_ES6.1.normal.js
+++ b/crates/swc/tests/tsc-references/computedPropertyNames27_ES6.1.normal.js
@@ -1,7 +1,7 @@
 //// [computedPropertyNames27_ES6.ts]
 class Base {
 }
-let tmp = (super(), "prop");
+let _tmp = (super(), "prop");
 class C extends Base {
-    [tmp]() {}
+    [_tmp]() {}
 }
diff --git a/crates/swc/tests/tsc-references/contextuallyTypedBindingInitializer.1.normal.js b/crates/swc/tests/tsc-references/contextuallyTypedBindingInitializer.1.normal.js
index c7aac59d2bc8..1dfc76fedb93 100644
--- a/crates/swc/tests/tsc-references/contextuallyTypedBindingInitializer.1.normal.js
+++ b/crates/swc/tests/tsc-references/contextuallyTypedBindingInitializer.1.normal.js
@@ -1,8 +1,8 @@
 //// [contextuallyTypedBindingInitializer.ts]
 function f(param) {
-    var _show = param.show, show = _show === void 0 ? function(v) {
+    var _param_show = param.show, show = _param_show === void 0 ? function(v) {
         return v.toString();
-    } : _show;
+    } : _param_show;
 }
 function f2(param) {
     var tmp = param["show"], showRename = tmp === void 0 ? function(v) {
@@ -15,25 +15,25 @@ function f3(param) {
     } : tmp;
 }
 function ff(param) {
-    var _nested = param.nested, nested = _nested === void 0 ? {
+    var _param_nested = param.nested, nested = _param_nested === void 0 ? {
         show: function(v) {
             return v.toString();
         }
-    } : _nested;
+    } : _param_nested;
 }
 function g(param) {
-    var _prop = param.prop, prop = _prop === void 0 ? [
+    var _param_prop = param.prop, prop = _param_prop === void 0 ? [
         "hello",
         1234
-    ] : _prop;
+    ] : _param_prop;
 }
 function h(param) {
-    var _prop = param.prop, prop = _prop === void 0 ? "foo" : _prop;
+    var _param_prop = param.prop, prop = _param_prop === void 0 ? "foo" : _param_prop;
 }
-var ref = {
+var _ref = {
     stringIdentity: function(x) {
         return x;
     }
-}, tmp = ref.stringIdentity, id = tmp === void 0 ? function(arg) {
+}, tmp = _ref.stringIdentity, id = tmp === void 0 ? function(arg) {
     return arg;
 } : tmp;
diff --git a/crates/swc/tests/tsc-references/contextuallyTypedBindingInitializerNegative.1.normal.js b/crates/swc/tests/tsc-references/contextuallyTypedBindingInitializerNegative.1.normal.js
index a14fbc4068a6..a006196dff76 100644
--- a/crates/swc/tests/tsc-references/contextuallyTypedBindingInitializerNegative.1.normal.js
+++ b/crates/swc/tests/tsc-references/contextuallyTypedBindingInitializerNegative.1.normal.js
@@ -21,19 +21,19 @@ function ff(param) {
         }
     } : tmp;
 }
-var ref = {
+var _ref = {
     stringIdentity: function(x) {
         return x;
     }
-}, tmp = ref.stringIdentity, id = tmp === void 0 ? function(arg) {
+}, tmp = _ref.stringIdentity, id = tmp === void 0 ? function(arg) {
     return arg.length;
 } : tmp;
 function g(param) {
-    var _prop = param.prop, prop = _prop === void 0 ? [
+    var _param_prop = param.prop, prop = _param_prop === void 0 ? [
         101,
         1234
-    ] : _prop;
+    ] : _param_prop;
 }
 function h(param) {
-    var _prop = param.prop, prop = _prop === void 0 ? "baz" : _prop;
+    var _param_prop = param.prop, prop = _param_prop === void 0 ? "baz" : _param_prop;
 }
diff --git a/crates/swc/tests/tsc-references/contextuallyTypedIife.1.normal.js b/crates/swc/tests/tsc-references/contextuallyTypedIife.1.normal.js
index 6cb00ab9c5a9..fb14dc4490e7 100644
--- a/crates/swc/tests/tsc-references/contextuallyTypedIife.1.normal.js
+++ b/crates/swc/tests/tsc-references/contextuallyTypedIife.1.normal.js
@@ -68,23 +68,23 @@
     q: 13
 });
 (function(param) {
-    var _p = param.p, p = _p === void 0 ? 14 : _p;
+    var _param_p = param.p, p = _param_p === void 0 ? 14 : _param_p;
     return p;
 })({
     p: 15
 });
 (function() {
-    var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
+    var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
         r: 18
-    }, _r = ref.r, r = _r === void 0 ? 17 : _r;
+    }, _ref_r = _ref.r, r = _ref_r === void 0 ? 17 : _ref_r;
     return r;
 })({
     r: 19
 });
 (function() {
-    var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
+    var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
         u: 23
-    }, _u = ref.u, u = _u === void 0 ? 22 : _u;
+    }, _ref_u = _ref.u, u = _ref_u === void 0 ? 22 : _ref_u;
     return u;
 })();
 // contextually typed parameters.
diff --git a/crates/swc/tests/tsc-references/contextuallyTypedIife.2.minified.js b/crates/swc/tests/tsc-references/contextuallyTypedIife.2.minified.js
index ca7afce92bad..e81126c1886f 100644
--- a/crates/swc/tests/tsc-references/contextuallyTypedIife.2.minified.js
+++ b/crates/swc/tests/tsc-references/contextuallyTypedIife.2.minified.js
@@ -21,17 +21,17 @@
 }(), function(first) {
     for(var _len = arguments.length, rest = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++)rest[_key - 1] = arguments[_key];
 }(8, 9, 10), function() {
-    var ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {
+    var _ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {
         r: 18
     };
-    ref.r;
+    _ref.r;
 }({
     r: 19
 }), function() {
-    var ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {
+    var _ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {
         u: 23
     };
-    ref.u;
+    _ref.u;
 }(), function(o) {
     o.a(11);
 }({
diff --git a/crates/swc/tests/tsc-references/contextuallyTypedIifeStrict.1.normal.js b/crates/swc/tests/tsc-references/contextuallyTypedIifeStrict.1.normal.js
index a33f92cbcf02..831c80e13c5b 100644
--- a/crates/swc/tests/tsc-references/contextuallyTypedIifeStrict.1.normal.js
+++ b/crates/swc/tests/tsc-references/contextuallyTypedIifeStrict.1.normal.js
@@ -68,23 +68,23 @@
     q: 13
 });
 (function(param) {
-    var _p = param.p, p = _p === void 0 ? 14 : _p;
+    var _param_p = param.p, p = _param_p === void 0 ? 14 : _param_p;
     return p;
 })({
     p: 15
 });
 (function() {
-    var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
+    var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
         r: 18
-    }, _r = ref.r, r = _r === void 0 ? 17 : _r;
+    }, _ref_r = _ref.r, r = _ref_r === void 0 ? 17 : _ref_r;
     return r;
 })({
     r: 19
 });
 (function() {
-    var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
+    var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
         u: 23
-    }, _u = ref.u, u = _u === void 0 ? 22 : _u;
+    }, _ref_u = _ref.u, u = _ref_u === void 0 ? 22 : _ref_u;
     return u;
 })();
 // contextually typed parameters.
diff --git a/crates/swc/tests/tsc-references/contextuallyTypedIifeStrict.2.minified.js b/crates/swc/tests/tsc-references/contextuallyTypedIifeStrict.2.minified.js
index 3f306031c173..a69b0c7a3eca 100644
--- a/crates/swc/tests/tsc-references/contextuallyTypedIifeStrict.2.minified.js
+++ b/crates/swc/tests/tsc-references/contextuallyTypedIifeStrict.2.minified.js
@@ -21,17 +21,17 @@
 }(), function(first) {
     for(var _len = arguments.length, rest = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++)rest[_key - 1] = arguments[_key];
 }(8, 9, 10), function() {
-    var ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {
+    var _ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {
         r: 18
     };
-    ref.r;
+    _ref.r;
 }({
     r: 19
 }), function() {
-    var ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {
+    var _ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {
         u: 23
     };
-    ref.u;
+    _ref.u;
 }(), function(o) {
     o.a(11);
 }({
diff --git a/crates/swc/tests/tsc-references/controlFlowDestructuringDeclaration.1.normal.js b/crates/swc/tests/tsc-references/controlFlowDestructuringDeclaration.1.normal.js
index 8671dd168afc..7d8bbdf981b7 100644
--- a/crates/swc/tests/tsc-references/controlFlowDestructuringDeclaration.1.normal.js
+++ b/crates/swc/tests/tsc-references/controlFlowDestructuringDeclaration.1.normal.js
@@ -10,9 +10,9 @@ function f2() {
     x;
     var y = "";
     y;
-    var ref = [
+    var _ref = [
         undefined
-    ], tmp = ref[0], z = tmp === void 0 ? "" : tmp;
+    ], tmp = _ref[0], z = tmp === void 0 ? "" : tmp;
     z;
 }
 function f3() {
@@ -20,9 +20,9 @@ function f3() {
     x;
     var y = "";
     y;
-    var ref = [
+    var _ref = [
         undefined
-    ], tmp = ref[0], z = tmp === void 0 ? "" : tmp;
+    ], tmp = _ref[0], z = tmp === void 0 ? "" : tmp;
     z;
 }
 function f4() {
@@ -34,9 +34,9 @@ function f4() {
         y: ""
     }.y;
     y;
-    var ref = {
+    var _ref = {
         z: undefined
-    }, _z = ref.z, z = _z === void 0 ? "" : _z;
+    }, _ref_z = _ref.z, z = _ref_z === void 0 ? "" : _ref_z;
     z;
 }
 function f5() {
@@ -48,9 +48,9 @@ function f5() {
         y: ""
     }.y;
     y;
-    var ref = {
+    var _ref = {
         z: undefined
-    }, _z = ref.z, z = _z === void 0 ? "" : _z;
+    }, _ref_z = _ref.z, z = _ref_z === void 0 ? "" : _ref_z;
     z;
 }
 function f6() {
@@ -58,7 +58,7 @@ function f6() {
     x;
     var y = {}.y;
     y;
-    var ref = {}, _z = ref.z, z = _z === void 0 ? "" : _z;
+    var _ref = {}, _ref_z = _ref.z, z = _ref_z === void 0 ? "" : _ref_z;
     z;
 }
 function f7() {
diff --git a/crates/swc/tests/tsc-references/controlFlowOptionalChain.1.normal.js b/crates/swc/tests/tsc-references/controlFlowOptionalChain.1.normal.js
index 246d73d4bb75..32ddc6f4a8a8 100644
--- a/crates/swc/tests/tsc-references/controlFlowOptionalChain.1.normal.js
+++ b/crates/swc/tests/tsc-references/controlFlowOptionalChain.1.normal.js
@@ -2,7 +2,7 @@
 // assignments in shortcutting chain
 import _instanceof from "@swc/helpers/src/_instanceof.mjs";
 import _type_of from "@swc/helpers/src/_type_of.mjs";
-var ref, ref1, ref2, ref3, ref4, ref5, ref6, ref7, ref8;
+var _o4_x, _o4_x1, _o5_x, _ref, _o5_x1, _o5_x2, _o5_x3, _ref1, _arr_i;
 var a;
 o === null || o === void 0 ? void 0 : o[a = 1];
 a.toString();
@@ -54,42 +54,42 @@ if ((o3 === null || o3 === void 0 ? void 0 : o3.x) === 1) {
 o3;
 o3 === null || o3 === void 0 ? void 0 : o3.x;
 o3.x;
-if ((ref = o4.x) === null || ref === void 0 ? void 0 : ref.y) {
-    var ref9;
+if ((_o4_x = o4.x) === null || _o4_x === void 0 ? void 0 : _o4_x.y) {
+    var _o4_x2;
     o4.x; // { y: boolean }
     o4.x.y; // true
-    (ref9 = o4.x) === null || ref9 === void 0 ? void 0 : ref9.y; // true
+    (_o4_x2 = o4.x) === null || _o4_x2 === void 0 ? void 0 : _o4_x2.y; // true
 } else {
-    var ref10;
+    var _o4_x3;
     o4.x;
-    (ref10 = o4.x) === null || ref10 === void 0 ? void 0 : ref10.y;
+    (_o4_x3 = o4.x) === null || _o4_x3 === void 0 ? void 0 : _o4_x3.y;
     o4.x.y;
 }
 o4.x;
-(ref1 = o4.x) === null || ref1 === void 0 ? void 0 : ref1.y;
+(_o4_x1 = o4.x) === null || _o4_x1 === void 0 ? void 0 : _o4_x1.y;
 o4.x.y;
-if ((ref3 = (ref2 = o5.x) === null || ref2 === void 0 ? void 0 : ref2.y.z) === null || ref3 === void 0 ? void 0 : ref3.w) {
-    var ref11, ref12, ref13, ref14;
+if ((_ref = (_o5_x = o5.x) === null || _o5_x === void 0 ? void 0 : _o5_x.y.z) === null || _ref === void 0 ? void 0 : _ref.w) {
+    var _o5_x_y_z, _o5_x4, _o5_x5, _ref2;
     o5.x;
     o5.x.y;
     o5.x.y.z;
     o5.x.y.z.w; // true
-    (ref11 = o5.x.y.z) === null || ref11 === void 0 ? void 0 : ref11.w; // true
-    (ref12 = o5.x) === null || ref12 === void 0 ? void 0 : ref12.y.z.w; // true
-    (ref14 = (ref13 = o5.x) === null || ref13 === void 0 ? void 0 : ref13.y.z) === null || ref14 === void 0 ? void 0 : ref14.w; // true
+    (_o5_x_y_z = o5.x.y.z) === null || _o5_x_y_z === void 0 ? void 0 : _o5_x_y_z.w; // true
+    (_o5_x4 = o5.x) === null || _o5_x4 === void 0 ? void 0 : _o5_x4.y.z.w; // true
+    (_ref2 = (_o5_x5 = o5.x) === null || _o5_x5 === void 0 ? void 0 : _o5_x5.y.z) === null || _ref2 === void 0 ? void 0 : _ref2.w; // true
 } else {
-    var ref15, ref16, ref17, ref18;
+    var _o5_x6, _o5_x7, _o5_x8, _ref3;
     o5.x;
-    (ref15 = o5.x) === null || ref15 === void 0 ? void 0 : ref15.y;
-    (ref16 = o5.x) === null || ref16 === void 0 ? void 0 : ref16.y.z;
-    (ref18 = (ref17 = o5.x) === null || ref17 === void 0 ? void 0 : ref17.y.z) === null || ref18 === void 0 ? void 0 : ref18.w;
+    (_o5_x6 = o5.x) === null || _o5_x6 === void 0 ? void 0 : _o5_x6.y;
+    (_o5_x7 = o5.x) === null || _o5_x7 === void 0 ? void 0 : _o5_x7.y.z;
+    (_ref3 = (_o5_x8 = o5.x) === null || _o5_x8 === void 0 ? void 0 : _o5_x8.y.z) === null || _ref3 === void 0 ? void 0 : _ref3.w;
     o5.x.y;
     o5.x.y.z.w;
 }
 o5.x;
-(ref4 = o5.x) === null || ref4 === void 0 ? void 0 : ref4.y;
-(ref5 = o5.x) === null || ref5 === void 0 ? void 0 : ref5.y.z;
-(ref7 = (ref6 = o5.x) === null || ref6 === void 0 ? void 0 : ref6.y.z) === null || ref7 === void 0 ? void 0 : ref7.w;
+(_o5_x1 = o5.x) === null || _o5_x1 === void 0 ? void 0 : _o5_x1.y;
+(_o5_x2 = o5.x) === null || _o5_x2 === void 0 ? void 0 : _o5_x2.y.z;
+(_ref1 = (_o5_x3 = o5.x) === null || _o5_x3 === void 0 ? void 0 : _o5_x3.y.z) === null || _ref1 === void 0 ? void 0 : _ref1.w;
 o5.x.y;
 o5.x.y.z.w;
 if (o6 === null || o6 === void 0 ? void 0 : o6.f()) {
@@ -452,8 +452,8 @@ function getArea(shape) {
     }
 }
 function extractCoordinates(f1) {
-    var ref;
-    if (((ref = f1.geometry) === null || ref === void 0 ? void 0 : ref.type) !== "test") {
+    var _f_geometry;
+    if (((_f_geometry = f1.geometry) === null || _f_geometry === void 0 ? void 0 : _f_geometry.type) !== "test") {
         return [];
     }
     return f1.geometry.coordinates;
@@ -473,10 +473,10 @@ someFunction(someObject);
 someFunction(undefined);
 // Repro from #35970
 var i = 0;
-while(((ref8 = arr[i]) === null || ref8 === void 0 ? void 0 : ref8.tag) === "left"){
-    var ref19;
+while(((_arr_i = arr[i]) === null || _arr_i === void 0 ? void 0 : _arr_i.tag) === "left"){
+    var _arr_i1;
     i += 1;
-    if (((ref19 = arr[i]) === null || ref19 === void 0 ? void 0 : ref19.tag) === "right") {
+    if (((_arr_i1 = arr[i]) === null || _arr_i1 === void 0 ? void 0 : _arr_i1.tag) === "right") {
         console.log("I should ALSO be reachable");
     }
 }
diff --git a/crates/swc/tests/tsc-references/controlFlowOptionalChain.2.minified.js b/crates/swc/tests/tsc-references/controlFlowOptionalChain.2.minified.js
index 3b90d3892805..79b8ecd11f3c 100644
--- a/crates/swc/tests/tsc-references/controlFlowOptionalChain.2.minified.js
+++ b/crates/swc/tests/tsc-references/controlFlowOptionalChain.2.minified.js
@@ -2,7 +2,7 @@
 function someFunction(someOptionalObject) {
     (null == someOptionalObject ? void 0 : someOptionalObject.someProperty) !== lastSomeProperty && (console.log(someOptionalObject), console.log(someOptionalObject.someProperty), lastSomeProperty = null == someOptionalObject ? void 0 : someOptionalObject.someProperty);
 }
-null == o || o[a = 1], a.toString(), null == o || o.x[b = 1], b.toString(), null == o || o(c = 1), c.toString(), null == o || o.x(d = 1), d.toString(), null == f || f(x), f(x), f(x), (null == o2 ? void 0 : o2.f(x)) ? (o2.f, null == o2 || o2.f, null == o2 || o2.f(x)) : (null == o2 || o2.f, o2.f), null == o2 || o2.f, o2.f, (null == o3 ? void 0 : o3.x) === 1 ? (o3.x, null == o3 || o3.x) : (null == o3 || o3.x, o3.x), null == o3 || o3.x, o3.x, (null === (ref = o4.x) || void 0 === ref ? void 0 : ref.y) ? (o4.x, o4.x.y, null === (ref9 = o4.x) || void 0 === ref9 || ref9.y) : (o4.x, null === (ref10 = o4.x) || void 0 === ref10 || ref10.y, o4.x.y), o4.x, null === (ref1 = o4.x) || void 0 === ref1 || ref1.y, o4.x.y, (null === (ref3 = null === (ref2 = o5.x) || void 0 === ref2 ? void 0 : ref2.y.z) || void 0 === ref3 ? void 0 : ref3.w) ? (o5.x, o5.x.y, o5.x.y.z, o5.x.y.z.w, null === (ref11 = o5.x.y.z) || void 0 === ref11 || ref11.w, null === (ref12 = o5.x) || void 0 === ref12 || ref12.y.z.w, null === (ref14 = null === (ref13 = o5.x) || void 0 === ref13 ? void 0 : ref13.y.z) || void 0 === ref14 || ref14.w) : (o5.x, null === (ref15 = o5.x) || void 0 === ref15 || ref15.y, null === (ref16 = o5.x) || void 0 === ref16 || ref16.y.z, null === (ref18 = null === (ref17 = o5.x) || void 0 === ref17 ? void 0 : ref17.y.z) || void 0 === ref18 || ref18.w, o5.x.y, o5.x.y.z.w), o5.x, null === (ref4 = o5.x) || void 0 === ref4 || ref4.y, null === (ref5 = o5.x) || void 0 === ref5 || ref5.y.z, null === (ref7 = null === (ref6 = o5.x) || void 0 === ref6 ? void 0 : ref6.y.z) || void 0 === ref7 || ref7.w, o5.x.y, o5.x.y.z.w, (null == o6 ? void 0 : o6.f()) || null == o6 || o6.f, o6.f, null == o6 || o6.f, o6.f, someFunction({
+null == o || o[a = 1], a.toString(), null == o || o.x[b = 1], b.toString(), null == o || o(c = 1), c.toString(), null == o || o.x(d = 1), d.toString(), null == f || f(x), f(x), f(x), (null == o2 ? void 0 : o2.f(x)) ? (o2.f, null == o2 || o2.f, null == o2 || o2.f(x)) : (null == o2 || o2.f, o2.f), null == o2 || o2.f, o2.f, (null == o3 ? void 0 : o3.x) === 1 ? (o3.x, null == o3 || o3.x) : (null == o3 || o3.x, o3.x), null == o3 || o3.x, o3.x, (null === (_o4_x = o4.x) || void 0 === _o4_x ? void 0 : _o4_x.y) ? (o4.x, o4.x.y, null === (_o4_x2 = o4.x) || void 0 === _o4_x2 || _o4_x2.y) : (o4.x, null === (_o4_x3 = o4.x) || void 0 === _o4_x3 || _o4_x3.y, o4.x.y), o4.x, null === (_o4_x1 = o4.x) || void 0 === _o4_x1 || _o4_x1.y, o4.x.y, (null === (_ref = null === (_o5_x = o5.x) || void 0 === _o5_x ? void 0 : _o5_x.y.z) || void 0 === _ref ? void 0 : _ref.w) ? (o5.x, o5.x.y, o5.x.y.z, o5.x.y.z.w, null === (_o5_x_y_z = o5.x.y.z) || void 0 === _o5_x_y_z || _o5_x_y_z.w, null === (_o5_x4 = o5.x) || void 0 === _o5_x4 || _o5_x4.y.z.w, null === (_ref2 = null === (_o5_x5 = o5.x) || void 0 === _o5_x5 ? void 0 : _o5_x5.y.z) || void 0 === _ref2 || _ref2.w) : (o5.x, null === (_o5_x6 = o5.x) || void 0 === _o5_x6 || _o5_x6.y, null === (_o5_x7 = o5.x) || void 0 === _o5_x7 || _o5_x7.y.z, null === (_ref3 = null === (_o5_x8 = o5.x) || void 0 === _o5_x8 ? void 0 : _o5_x8.y.z) || void 0 === _ref3 || _ref3.w, o5.x.y, o5.x.y.z.w), o5.x, null === (_o5_x1 = o5.x) || void 0 === _o5_x1 || _o5_x1.y, null === (_o5_x2 = o5.x) || void 0 === _o5_x2 || _o5_x2.y.z, null === (_ref1 = null === (_o5_x3 = o5.x) || void 0 === _o5_x3 ? void 0 : _o5_x3.y.z) || void 0 === _ref1 || _ref1.w, o5.x.y, o5.x.y.z.w, (null == o6 ? void 0 : o6.f()) || null == o6 || o6.f, o6.f, null == o6 || o6.f, o6.f, someFunction({
     someProperty: 42
 }), someFunction(void 0);
-for(var ref, ref1, ref2, ref3, ref4, ref5, ref6, ref7, ref8, a, b, c, d, ref9, ref10, ref11, ref12, ref13, ref14, ref15, ref16, ref17, ref18, lastSomeProperty, ref19, i = 0; (null === (ref8 = arr[i]) || void 0 === ref8 ? void 0 : ref8.tag) === "left";)i += 1, (null === (ref19 = arr[i]) || void 0 === ref19 ? void 0 : ref19.tag) === "right" && console.log("I should ALSO be reachable");
+for(var _o4_x, _o4_x1, _o5_x, _ref, _o5_x1, _o5_x2, _o5_x3, _ref1, _arr_i, a, b, c, d, _o4_x2, _o4_x3, _o5_x_y_z, _o5_x4, _o5_x5, _ref2, _o5_x6, _o5_x7, _o5_x8, _ref3, lastSomeProperty, _arr_i1, i = 0; (null === (_arr_i = arr[i]) || void 0 === _arr_i ? void 0 : _arr_i.tag) === "left";)i += 1, (null === (_arr_i1 = arr[i]) || void 0 === _arr_i1 ? void 0 : _arr_i1.tag) === "right" && console.log("I should ALSO be reachable");
diff --git a/crates/swc/tests/tsc-references/declarationsAndAssignments.1.normal.js b/crates/swc/tests/tsc-references/declarationsAndAssignments.1.normal.js
index ea031acf8aa5..31f6831269c2 100644
--- a/crates/swc/tests/tsc-references/declarationsAndAssignments.1.normal.js
+++ b/crates/swc/tests/tsc-references/declarationsAndAssignments.1.normal.js
@@ -3,19 +3,19 @@ import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 import _throw from "@swc/helpers/src/_throw.mjs";
 import _to_array from "@swc/helpers/src/_to_array.mjs";
 function f0() {
-    var ref = [
+    var _ref = [
         1,
         "hello"
     ];
-    var ref1 = [
+    var _ref1 = [
         1,
         "hello"
-    ], x = ref1[0];
+    ], x = _ref1[0];
     var x = 1, y = "hello";
-    var ref2 = [
+    var _ref2 = [
         1,
         "hello"
-    ], x = ref2[0], y = ref2[1], z = ref2[2];
+    ], x = _ref2[0], y = _ref2[1], z = _ref2[2];
     var x = 2;
     var x;
     var y;
@@ -33,10 +33,10 @@ function f1() {
     var z;
 }
 function f2() {
-    var ref = {
+    var _ref = {
         x: 5,
         y: "hello"
-    }, ref = ref !== null ? ref : _throw(new TypeError("Cannot destructure undefined")); // Ok, empty binding pattern means nothing
+    }, _ref = _ref !== null ? _ref : _throw(new TypeError("Cannot destructure undefined")); // Ok, empty binding pattern means nothing
     var x = {
         x: 5,
         y: "hello"
@@ -45,24 +45,24 @@ function f2() {
         x: 5,
         y: "hello"
     }.y; // Error, no x in target
-    var ref1 = {
+    var _ref1 = {
         x: 5,
         y: "hello"
-    }, x = ref1.x, y = ref1.y;
+    }, x = _ref1.x, y = _ref1.y;
     var x;
     var y;
-    var ref2 = {
+    var _ref2 = {
         x: 5,
         y: "hello"
-    }, a = ref2.x; // Error, no y in target
-    var ref3 = {
+    }, a = _ref2.x; // Error, no y in target
+    var _ref3 = {
         x: 5,
         y: "hello"
-    }, b = ref3.y; // Error, no x in target
-    var ref4 = {
+    }, b = _ref3.y; // Error, no x in target
+    var _ref4 = {
         x: 5,
         y: "hello"
-    }, a = ref4.x, b = ref4.y;
+    }, a = _ref4.x, b = _ref4.y;
     var a;
     var b;
 }
@@ -73,7 +73,7 @@ function f3() {
     var z;
 }
 function f4() {
-    var ref = {
+    var _ref = {
         a: 1,
         b: {
             a: "hello",
@@ -81,7 +81,7 @@ function f4() {
                 a: true
             }
         }
-    }, x = ref.a, _b = ref.b, y = _b.a, _b1 = _b.b, z = _b1.a;
+    }, x = _ref.a, _ref_b = _ref.b, y = _ref_b.a, _ref_b_b = _ref_b.b, z = _ref_b_b.a;
     var x;
     var y;
     var z;
@@ -97,40 +97,40 @@ function f7() {
     var y;
 }
 function f8() {
-    var ref = [], a = ref[0], b = ref[1], c = ref[2]; // Error, [] is an empty tuple
-    var ref1 = [
+    var _ref = [], a = _ref[0], b = _ref[1], c = _ref[2]; // Error, [] is an empty tuple
+    var _ref1 = [
         1
-    ], d = ref1[0], e = ref1[1], f = ref1[2]; // Error, [1] is a tuple
+    ], d = _ref1[0], e = _ref1[1], f = _ref1[2]; // Error, [1] is a tuple
 }
 function f9() {
-    var ref = _sliced_to_array({}, 2), a = ref[0], b = ref[1]; // Error, not array type
-    var ref1 = _sliced_to_array({
+    var _ref = _sliced_to_array({}, 2), a = _ref[0], b = _ref[1]; // Error, not array type
+    var _ref1 = _sliced_to_array({
         0: 10,
         1: 20
-    }, 2), c = ref1[0], d = ref1[1]; // Error, not array type
+    }, 2), c = _ref1[0], d = _ref1[1]; // Error, not array type
     var e = 10, f = 20;
 }
 function f10() {
-    var ref = {}, a = ref.a, b = ref.b; // Error
-    var ref1 = [], a = ref1.a, b = ref1.b; // Error
+    var _ref = {}, a = _ref.a, b = _ref.b; // Error
+    var _ref1 = [], a = _ref1.a, b = _ref1.b; // Error
 }
 function f11() {
-    var ref = {
+    var _ref = {
         x: 10,
         y: "hello"
-    }, a = ref.x, b = ref.y;
-    var ref1 = {
+    }, a = _ref.x, b = _ref.y;
+    var _ref1 = {
         0: 10,
         1: "hello"
-    }, a = ref1[0], b = ref1[1];
-    var ref2 = {
+    }, a = _ref1[0], b = _ref1[1];
+    var _ref2 = {
         "<": 10,
         ">": "hello"
-    }, a = ref2["<"], b = ref2[">"];
-    var ref3 = [
+    }, a = _ref2["<"], b = _ref2[">"];
+    var _ref3 = [
         10,
         "hello"
-    ], a = ref3[0], b = ref3[1];
+    ], a = _ref3[0], b = _ref3[1];
     var a;
     var b;
 }
@@ -141,13 +141,13 @@ function f12() {
             x: 5,
             y: true
         }
-    ], ref = _sliced_to_array(tmp === void 0 ? [
+    ], _ref = _sliced_to_array(tmp === void 0 ? [
         "abc",
         {
             x: 10,
             y: false
         }
-    ] : tmp, 2), b = ref[0], ref1 = ref[1], x = ref1.x, c = ref1.y;
+    ] : tmp, 2), b = _ref[0], _ref_ = _ref[1], x = _ref_.x, c = _ref_.y;
     var a;
     var b;
     var x;
@@ -155,7 +155,7 @@ function f12() {
 }
 function f13() {
     var x = 1, y = "hello";
-    var ref = [
+    var _ref = [
         [
             x,
             y
@@ -164,10 +164,10 @@ function f13() {
             x: x,
             y: y
         }
-    ], a = ref[0], b = ref[1];
+    ], a = _ref[0], b = _ref[1];
 }
 function f14(param) {
-    var _param = _sliced_to_array(param, 2), tmp = _param[0], a = tmp === void 0 ? 1 : tmp, ref = _sliced_to_array(_param[1], 2), tmp1 = ref[0], b = tmp1 === void 0 ? "hello" : tmp1, ref1 = ref[1], x = ref1.x, tmp2 = ref1.y, c = tmp2 === void 0 ? false : tmp2;
+    var _param = _sliced_to_array(param, 2), tmp = _param[0], a = tmp === void 0 ? 1 : tmp, _param_ = _sliced_to_array(_param[1], 2), tmp1 = _param_[0], b = tmp1 === void 0 ? "hello" : tmp1, _param__ = _param_[1], x = _param__.x, tmp2 = _param__.y, c = tmp2 === void 0 ? false : tmp2;
     var a;
     var b;
     var c;
@@ -215,10 +215,10 @@ function f15() {
     };
 }
 function f16() {
-    var ref = f15(), a = ref.a, b = ref.b, c = ref.c;
+    var _f15 = f15(), a = _f15.a, b = _f15.b, c = _f15.c;
 }
 function f17(param) {
-    var _a = param.a, a = _a === void 0 ? "" : _a, _b = param.b, b = _b === void 0 ? 0 : _b, _c = param.c, c = _c === void 0 ? false : _c;
+    var _param_a = param.a, a = _param_a === void 0 ? "" : _param_a, _param_b = param.b, b = _param_b === void 0 ? 0 : _param_b, _param_c = param.c, c = _param_c === void 0 ? false : _param_c;
 }
 f17({});
 f17({
diff --git a/crates/swc/tests/tsc-references/declarationsAndAssignments.2.minified.js b/crates/swc/tests/tsc-references/declarationsAndAssignments.2.minified.js
index 78cf0f11317f..ca614eee86cd 100644
--- a/crates/swc/tests/tsc-references/declarationsAndAssignments.2.minified.js
+++ b/crates/swc/tests/tsc-references/declarationsAndAssignments.2.minified.js
@@ -2,8 +2,8 @@
 var M;
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 function f14(param) {
-    var _param = _sliced_to_array(param, 2), ref = (_param[0], _sliced_to_array(_param[1], 2)), ref1 = (ref[0], ref[1]);
-    ref1.x, ref1.y;
+    var _param = _sliced_to_array(param, 2), _param_ = (_param[0], _sliced_to_array(_param[1], 2)), _param__ = (_param_[0], _param_[1]);
+    _param__.x, _param__.y;
 }
 function f17(param) {
     param.a, param.b, param.c;
diff --git a/crates/swc/tests/tsc-references/defineProperty(target=es5).1.normal.js b/crates/swc/tests/tsc-references/defineProperty(target=es5).1.normal.js
index 77f8f5678658..d2d7360e0845 100644
--- a/crates/swc/tests/tsc-references/defineProperty(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/defineProperty(target=es5).1.normal.js
@@ -7,7 +7,7 @@ import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
 var x = "p";
 var _x = x;
-var __x = _x;
+var _x1 = _x;
 var A = /*#__PURE__*/ function() {
     "use strict";
     function A(y) {
@@ -16,7 +16,7 @@ var A = /*#__PURE__*/ function() {
         _define_property(this, "b", void 0);
         _define_property(this, "c", void 0);
         _define_property(this, "computed", void 0);
-        _define_property(this, __x, void 0);
+        _define_property(this, _x1, void 0);
         _define_property(this, "z", void 0);
         _define_property(this, "y", void 0);
         this.y = y;
diff --git a/crates/swc/tests/tsc-references/deleteChain.1.normal.js b/crates/swc/tests/tsc-references/deleteChain.1.normal.js
index ab249ce65441..1cdb6a25eba8 100644
--- a/crates/swc/tests/tsc-references/deleteChain.1.normal.js
+++ b/crates/swc/tests/tsc-references/deleteChain.1.normal.js
@@ -1,15 +1,15 @@
 //// [deleteChain.ts]
-var ref, ref1, ref2, ref3, ref4, ref5, ref6, ref7, ref8, ref9, ref10, ref11, ref12, ref13, ref14, ref15;
+var _o3_b, _o3_b1, _o4_b, _ref, _o4_b1, _ref1, _o4_b2, _ref2, _o5_b, _ref3, _o5_b1, _ref4, _o6_b, _ref5, _o6_b1, _ref6;
 o1 === null || o1 === void 0 ? void 0 : delete o1.b;
 delete (o1 === null || o1 === void 0 ? void 0 : o1.b);
 o2 === null || o2 === void 0 ? void 0 : delete o2.b.c;
 o2 === null || o2 === void 0 ? void 0 : delete o2.b.c;
-(ref = o3.b) === null || ref === void 0 ? void 0 : delete ref.c;
-delete ((ref1 = o3.b) === null || ref1 === void 0 ? void 0 : ref1.c);
-(ref3 = (ref2 = o4.b) === null || ref2 === void 0 ? void 0 : ref2.c.d) === null || ref3 === void 0 ? void 0 : delete ref3.e;
-(ref5 = (ref4 = o4.b) === null || ref4 === void 0 ? void 0 : ref4.c.d) === null || ref5 === void 0 ? void 0 : delete ref5.e;
-delete ((ref7 = (ref6 = o4.b) === null || ref6 === void 0 ? void 0 : ref6.c.d) === null || ref7 === void 0 ? void 0 : ref7.e);
-(ref9 = (ref8 = o5.b) === null || ref8 === void 0 ? void 0 : ref8.call(o5).c.d) === null || ref9 === void 0 ? void 0 : delete ref9.e;
-delete ((ref11 = (ref10 = o5.b) === null || ref10 === void 0 ? void 0 : ref10.call(o5).c.d) === null || ref11 === void 0 ? void 0 : ref11.e);
-(ref13 = (ref12 = o6.b) === null || ref12 === void 0 ? void 0 : ref12["c"].d) === null || ref13 === void 0 ? void 0 : delete ref13["e"];
-delete ((ref15 = (ref14 = o6.b) === null || ref14 === void 0 ? void 0 : ref14["c"].d) === null || ref15 === void 0 ? void 0 : ref15["e"]);
+(_o3_b = o3.b) === null || _o3_b === void 0 ? void 0 : delete _o3_b.c;
+delete ((_o3_b1 = o3.b) === null || _o3_b1 === void 0 ? void 0 : _o3_b1.c);
+(_ref = (_o4_b = o4.b) === null || _o4_b === void 0 ? void 0 : _o4_b.c.d) === null || _ref === void 0 ? void 0 : delete _ref.e;
+(_ref1 = (_o4_b1 = o4.b) === null || _o4_b1 === void 0 ? void 0 : _o4_b1.c.d) === null || _ref1 === void 0 ? void 0 : delete _ref1.e;
+delete ((_ref2 = (_o4_b2 = o4.b) === null || _o4_b2 === void 0 ? void 0 : _o4_b2.c.d) === null || _ref2 === void 0 ? void 0 : _ref2.e);
+(_ref3 = (_o5_b = o5.b) === null || _o5_b === void 0 ? void 0 : _o5_b.call(o5).c.d) === null || _ref3 === void 0 ? void 0 : delete _ref3.e;
+delete ((_ref4 = (_o5_b1 = o5.b) === null || _o5_b1 === void 0 ? void 0 : _o5_b1.call(o5).c.d) === null || _ref4 === void 0 ? void 0 : _ref4.e);
+(_ref5 = (_o6_b = o6.b) === null || _o6_b === void 0 ? void 0 : _o6_b["c"].d) === null || _ref5 === void 0 ? void 0 : delete _ref5["e"];
+delete ((_ref6 = (_o6_b1 = o6.b) === null || _o6_b1 === void 0 ? void 0 : _o6_b1["c"].d) === null || _ref6 === void 0 ? void 0 : _ref6["e"]);
diff --git a/crates/swc/tests/tsc-references/deleteChain.2.minified.js b/crates/swc/tests/tsc-references/deleteChain.2.minified.js
index 2a737296b37a..57a234985d4f 100644
--- a/crates/swc/tests/tsc-references/deleteChain.2.minified.js
+++ b/crates/swc/tests/tsc-references/deleteChain.2.minified.js
@@ -1,3 +1,3 @@
 //// [deleteChain.ts]
-var ref, ref1, ref2, ref3, ref4, ref5, ref6, ref7, ref8, ref9, ref10, ref11, ref12, ref13, ref14, ref15;
-null == o1 || delete o1.b, delete (null == o1 ? void 0 : o1.b), null == o2 || delete o2.b.c, null == o2 || delete o2.b.c, null === (ref = o3.b) || void 0 === ref || delete ref.c, delete (null === (ref1 = o3.b) || void 0 === ref1 ? void 0 : ref1.c), null === (ref3 = null === (ref2 = o4.b) || void 0 === ref2 ? void 0 : ref2.c.d) || void 0 === ref3 || delete ref3.e, null === (ref5 = null === (ref4 = o4.b) || void 0 === ref4 ? void 0 : ref4.c.d) || void 0 === ref5 || delete ref5.e, delete (null === (ref7 = null === (ref6 = o4.b) || void 0 === ref6 ? void 0 : ref6.c.d) || void 0 === ref7 ? void 0 : ref7.e), null === (ref9 = null === (ref8 = o5.b) || void 0 === ref8 ? void 0 : ref8.call(o5).c.d) || void 0 === ref9 || delete ref9.e, delete (null === (ref11 = null === (ref10 = o5.b) || void 0 === ref10 ? void 0 : ref10.call(o5).c.d) || void 0 === ref11 ? void 0 : ref11.e), null === (ref13 = null === (ref12 = o6.b) || void 0 === ref12 ? void 0 : ref12.c.d) || void 0 === ref13 || delete ref13.e, delete (null === (ref15 = null === (ref14 = o6.b) || void 0 === ref14 ? void 0 : ref14.c.d) || void 0 === ref15 ? void 0 : ref15.e);
+var _o3_b, _o3_b1, _o4_b, _ref, _o4_b1, _ref1, _o4_b2, _ref2, _o5_b, _ref3, _o5_b1, _ref4, _o6_b, _ref5, _o6_b1, _ref6;
+null == o1 || delete o1.b, delete (null == o1 ? void 0 : o1.b), null == o2 || delete o2.b.c, null == o2 || delete o2.b.c, null === (_o3_b = o3.b) || void 0 === _o3_b || delete _o3_b.c, delete (null === (_o3_b1 = o3.b) || void 0 === _o3_b1 ? void 0 : _o3_b1.c), null === (_ref = null === (_o4_b = o4.b) || void 0 === _o4_b ? void 0 : _o4_b.c.d) || void 0 === _ref || delete _ref.e, null === (_ref1 = null === (_o4_b1 = o4.b) || void 0 === _o4_b1 ? void 0 : _o4_b1.c.d) || void 0 === _ref1 || delete _ref1.e, delete (null === (_ref2 = null === (_o4_b2 = o4.b) || void 0 === _o4_b2 ? void 0 : _o4_b2.c.d) || void 0 === _ref2 ? void 0 : _ref2.e), null === (_ref3 = null === (_o5_b = o5.b) || void 0 === _o5_b ? void 0 : _o5_b.call(o5).c.d) || void 0 === _ref3 || delete _ref3.e, delete (null === (_ref4 = null === (_o5_b1 = o5.b) || void 0 === _o5_b1 ? void 0 : _o5_b1.call(o5).c.d) || void 0 === _ref4 ? void 0 : _ref4.e), null === (_ref5 = null === (_o6_b = o6.b) || void 0 === _o6_b ? void 0 : _o6_b.c.d) || void 0 === _ref5 || delete _ref5.e, delete (null === (_ref6 = null === (_o6_b1 = o6.b) || void 0 === _o6_b1 ? void 0 : _o6_b1.c.d) || void 0 === _ref6 ? void 0 : _ref6.e);
diff --git a/crates/swc/tests/tsc-references/derivedClassSuperProperties.1.normal.js b/crates/swc/tests/tsc-references/derivedClassSuperProperties.1.normal.js
index 9d4a6f459017..d4ccfad66b68 100644
--- a/crates/swc/tests/tsc-references/derivedClassSuperProperties.1.normal.js
+++ b/crates/swc/tests/tsc-references/derivedClassSuperProperties.1.normal.js
@@ -348,8 +348,8 @@ var DerivedWithClassDeclarationExtendingMember = /*#__PURE__*/ function(Base) {
     function DerivedWithClassDeclarationExtendingMember() {
         _class_call_check(this, DerivedWithClassDeclarationExtendingMember);
         var _this;
-        var InnerClass = /*#__PURE__*/ function(_memberClass) {
-            _inherits(InnerClass, _memberClass);
+        var InnerClass = /*#__PURE__*/ function(_this_memberClass) {
+            _inherits(InnerClass, _this_memberClass);
             var _super = _create_super(InnerClass);
             function InnerClass() {
                 _class_call_check(this, InnerClass);
@@ -407,8 +407,8 @@ var DerivedWithClassExpressionExtendingMember = /*#__PURE__*/ function(Base) {
     function DerivedWithClassExpressionExtendingMember() {
         _class_call_check(this, DerivedWithClassExpressionExtendingMember);
         var _this;
-        console.log(/*#__PURE__*/ function(_memberClass) {
-            _inherits(_class, _memberClass);
+        console.log(/*#__PURE__*/ function(_this_memberClass) {
+            _inherits(_class, _this_memberClass);
             var _super = _create_super(_class);
             function _class() {
                 _class_call_check(this, _class);
diff --git a/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5.1.normal.js b/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5.1.normal.js
index f6ff5ed293ba..1d7ba5b507e2 100644
--- a/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5.1.normal.js
@@ -35,23 +35,23 @@ function foo() {
         3
     ];
 }
-var ref = _sliced_to_array(foo(), 2), b6 = ref[0], b7 = ref[1];
-var ref1 = _to_array(foo()), b8 = ref1.slice(0);
+var _foo = _sliced_to_array(foo(), 2), b6 = _foo[0], b7 = _foo[1];
+var _foo1 = _to_array(foo()), b8 = _foo1.slice(0);
 //      S is not a tuple- like type and the numeric index signature type of S is assignable to the target given in E.
 var temp = [
     1,
     2,
     3
 ];
-var ref2 = _sliced_to_array(_to_consumable_array(temp), 2), c0 = ref2[0], c1 = ref2[1];
-var ref3 = [], c2 = ref3[0];
-var ref4 = [], c3 = ref4[0], ref5 = [], c4 = ref5[0];
+var _$_to_consumable_array = _sliced_to_array(_to_consumable_array(temp), 2), c0 = _$_to_consumable_array[0], c1 = _$_to_consumable_array[1];
+var _ref = [], c2 = _ref[0];
+var _ref1 = [], c3 = _ref1[0], _ref2 = [], c4 = _ref2[0];
 var c5 = 1, c6 = true;
-var ref6 = [
+var _ref3 = [
     1,
     2,
     3
-], c7 = ref6[1];
+], c7 = _ref3[1];
 var c8 = 4;
 var c9 = 4;
 var c10 = [
diff --git a/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5.2.minified.js b/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5.2.minified.js
index 4bfcc395079d..81babdc056b9 100644
--- a/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5.2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5.2.minified.js
@@ -6,19 +6,19 @@ var _undefined = _sliced_to_array(void 0, 2);
 _undefined[0], _undefined[1];
 var _undefined1 = _sliced_to_array(void 0, 2);
 _undefined1[0], _undefined1[1];
-var ref = _sliced_to_array([
+var _foo = _sliced_to_array([
     1,
     2,
     3
 ], 2);
-ref[0], ref[1], _to_array([
+_foo[0], _foo[1], _to_array([
     1,
     2,
     3
 ]).slice(0);
-var ref1 = _sliced_to_array(_to_consumable_array([
+var _$_to_consumable_array = _sliced_to_array(_to_consumable_array([
     1,
     2,
     3
 ]), 2);
-ref1[0], ref1[1];
+_$_to_consumable_array[0], _$_to_consumable_array[1];
diff --git a/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5iterable.1.normal.js b/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5iterable.1.normal.js
index bbc4b3936234..2970a2895323 100644
--- a/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5iterable.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5iterable.1.normal.js
@@ -35,23 +35,23 @@ function foo() {
         3
     ];
 }
-var ref = _sliced_to_array(foo(), 2), b6 = ref[0], b7 = ref[1];
-var ref1 = _to_array(foo()), b8 = ref1.slice(0);
+var _foo = _sliced_to_array(foo(), 2), b6 = _foo[0], b7 = _foo[1];
+var _foo1 = _to_array(foo()), b8 = _foo1.slice(0);
 //      S is not a tuple- like type and the numeric index signature type of S is assignable to the target given in E.
 var temp = [
     1,
     2,
     3
 ];
-var ref2 = _sliced_to_array(_to_consumable_array(temp), 2), c0 = ref2[0], c1 = ref2[1];
-var ref3 = [], c2 = ref3[0];
-var ref4 = [], c3 = ref4[0], ref5 = [], c4 = ref5[0];
+var _$_to_consumable_array = _sliced_to_array(_to_consumable_array(temp), 2), c0 = _$_to_consumable_array[0], c1 = _$_to_consumable_array[1];
+var _ref = [], c2 = _ref[0];
+var _ref1 = [], c3 = _ref1[0], _ref2 = [], c4 = _ref2[0];
 var c5 = 1, c6 = true;
-var ref6 = [
+var _ref3 = [
     1,
     2,
     3
-], c7 = ref6[1];
+], c7 = _ref3[1];
 var c8 = 4;
 var c9 = 4;
 var c10 = [
diff --git a/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5iterable.2.minified.js b/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5iterable.2.minified.js
index ff708d768d9c..e23698457eb9 100644
--- a/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5iterable.2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment1ES5iterable.2.minified.js
@@ -6,19 +6,19 @@ var _undefined = _sliced_to_array(void 0, 2);
 _undefined[0], _undefined[1];
 var _undefined1 = _sliced_to_array(void 0, 2);
 _undefined1[0], _undefined1[1];
-var ref = _sliced_to_array([
+var _foo = _sliced_to_array([
     1,
     2,
     3
 ], 2);
-ref[0], ref[1], _to_array([
+_foo[0], _foo[1], _to_array([
     1,
     2,
     3
 ]).slice(0);
-var ref1 = _sliced_to_array(_to_consumable_array([
+var _$_to_consumable_array = _sliced_to_array(_to_consumable_array([
     1,
     2,
     3
 ]), 2);
-ref1[0], ref1[1];
+_$_to_consumable_array[0], _$_to_consumable_array[1];
diff --git a/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment2.1.normal.js b/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment2.1.normal.js
index 726c7e3aff4e..4f52d288572c 100644
--- a/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment2.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment2.1.normal.js
@@ -3,10 +3,10 @@
 //      S is the type Any, or
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 import _to_consumable_array from "@swc/helpers/src/_to_consumable_array.mjs";
-var ref // Error
- = [], ref1 = _sliced_to_array(ref[0], 1), a0 = ref1[0], ref2 = _sliced_to_array(ref[1], 1), ref3 = _sliced_to_array(ref2[0], 1), a1 = ref3[0];
+var _ref // Error
+ = [], _ref_ = _sliced_to_array(_ref[0], 1), a0 = _ref_[0], _ref_1 = _sliced_to_array(_ref[1], 1), _ref__ = _sliced_to_array(_ref_1[0], 1), a1 = _ref__[0];
 var _undefined // Error
- = _sliced_to_array(undefined, 2), ref4 = _sliced_to_array(_undefined[0], 1), a2 = ref4[0], ref5 = _sliced_to_array(_undefined[1], 1), ref6 = _sliced_to_array(ref5[0], 1), a3 = ref6[0];
+ = _sliced_to_array(undefined, 2), _undefined_ = _sliced_to_array(_undefined[0], 1), a2 = _undefined_[0], _undefined_1 = _sliced_to_array(_undefined[1], 1), _undefined__ = _sliced_to_array(_undefined_1[0], 1), a3 = _undefined__[0];
 // V is an array assignment pattern, S is the type Any or an array-like type (section 3.3.2), and, for each assignment element E in V,
 //      S is a tuple- like type (section 3.3.3) with a property named N of a type that is assignable to the target given in E,
 //        where N is the numeric index of E in the array assignment pattern, or
@@ -18,7 +18,7 @@ function bar() {
         3
     ];
 }
-var ref7 = _sliced_to_array(bar(), 3), tmp = ref7[0], b3 = tmp === void 0 ? "string" : tmp, b4 = ref7[1], b5 = ref7[2]; // Error
+var _bar = _sliced_to_array(bar(), 3), tmp = _bar[0], b3 = tmp === void 0 ? "string" : tmp, b4 = _bar[1], b5 = _bar[2]; // Error
 // V is an array assignment pattern, S is the type Any or an array-like type (section 3.3.2), and, for each assignment element E in V,
 //      S is not a tuple- like type and the numeric index signature type of S is assignable to the target given in E.
 var temp = [
@@ -26,11 +26,11 @@ var temp = [
     2,
     3
 ];
-var ref8 = _sliced_to_array(_to_consumable_array(temp), 2), c0 = ref8[0], c1 = ref8[1]; // Error
-var ref9 = _sliced_to_array(_to_consumable_array(temp), 2), c2 = ref9[0], c3 = ref9[1]; // Error
+var _$_to_consumable_array = _sliced_to_array(_to_consumable_array(temp), 2), c0 = _$_to_consumable_array[0], c1 = _$_to_consumable_array[1]; // Error
+var _$_to_consumable_array1 = _sliced_to_array(_to_consumable_array(temp), 2), c2 = _$_to_consumable_array1[0], c3 = _$_to_consumable_array1[1]; // Error
 function foo(idx) {
     return {
         2: true
     };
 }
-var ref10 = _sliced_to_array(foo(1), 3), c4 = ref10[0], c5 = ref10[1], c6 = ref10[2]; // Error
+var _foo = _sliced_to_array(foo(1), 3), c4 = _foo[0], c5 = _foo[1], c6 = _foo[2]; // Error
diff --git a/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment2.2.minified.js b/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment2.2.minified.js
index 17fa9bb7857a..b00317eb84f3 100644
--- a/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment2.2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment2.2.minified.js
@@ -1,25 +1,25 @@
 //// [destructuringArrayBindingPatternAndAssignment2.ts]
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 import _to_consumable_array from "@swc/helpers/src/_to_consumable_array.mjs";
-var ref = (_sliced_to_array([][0], 1)[0], _sliced_to_array([][1], 1));
-_sliced_to_array(ref[0], 1)[0];
-var _undefined = _sliced_to_array(void 0, 2), ref1 = (_sliced_to_array(_undefined[0], 1)[0], _sliced_to_array(_undefined[1], 1));
-_sliced_to_array(ref1[0], 1)[0];
-var ref2 = _sliced_to_array([
+var _ref_ = (_sliced_to_array([][0], 1)[0], _sliced_to_array([][1], 1));
+_sliced_to_array(_ref_[0], 1)[0];
+var _undefined = _sliced_to_array(void 0, 2), _undefined_ = (_sliced_to_array(_undefined[0], 1)[0], _sliced_to_array(_undefined[1], 1));
+_sliced_to_array(_undefined_[0], 1)[0];
+var _bar = _sliced_to_array([
     1,
     2,
     3
 ], 3);
-ref2[0], ref2[1], ref2[2];
+_bar[0], _bar[1], _bar[2];
 var temp = [
     1,
     2,
     3
-], ref3 = _sliced_to_array(_to_consumable_array(temp), 2);
-ref3[0], ref3[1];
-var ref4 = _sliced_to_array(_to_consumable_array(temp), 2);
-ref4[0], ref4[1];
-var ref5 = _sliced_to_array({
+], _$_to_consumable_array = _sliced_to_array(_to_consumable_array(temp), 2);
+_$_to_consumable_array[0], _$_to_consumable_array[1];
+var _$_to_consumable_array1 = _sliced_to_array(_to_consumable_array(temp), 2);
+_$_to_consumable_array1[0], _$_to_consumable_array1[1];
+var _foo = _sliced_to_array({
     2: !0
 }, 3);
-ref5[0], ref5[1], ref5[2];
+_foo[0], _foo[1], _foo[2];
diff --git a/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment3.1.normal.js b/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment3.1.normal.js
index 30adcf80de3b..caf60c5b414f 100644
--- a/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment3.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringArrayBindingPatternAndAssignment3.1.normal.js
@@ -1,14 +1,14 @@
 //// [destructuringArrayBindingPatternAndAssignment3.ts]
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
-var ref = [
+var _ref = [
     1
-], a = ref[0], tmp = ref[1], b = tmp === void 0 ? a : tmp; // ok
-var ref1 = [
+], a = _ref[0], tmp = _ref[1], b = tmp === void 0 ? a : tmp; // ok
+var _ref1 = [
     1
-], c = ref1[0], tmp1 = ref1[1], d = tmp1 === void 0 ? c : tmp1, tmp2 = ref1[2], e = tmp2 === void 0 ? e : tmp2; // error for e = e
-var ref2 = [
+], c = _ref1[0], tmp1 = _ref1[1], d = tmp1 === void 0 ? c : tmp1, tmp2 = _ref1[2], e = tmp2 === void 0 ? e : tmp2; // error for e = e
+var _ref2 = [
     1
-], f = ref2[0], tmp3 = ref2[1], g = tmp3 === void 0 ? f : tmp3, tmp4 = ref2[2], h = tmp4 === void 0 ? i : tmp4, tmp5 = ref2[3], i = tmp5 === void 0 ? f : tmp5; // error for h = i
+], f = _ref2[0], tmp3 = _ref2[1], g = tmp3 === void 0 ? f : tmp3, tmp4 = _ref2[2], h = tmp4 === void 0 ? i : tmp4, tmp5 = _ref2[3], i = tmp5 === void 0 ? f : tmp5; // error for h = i
 (function(param) {
     var _param = _sliced_to_array(param, 2), a = _param[0], tmp = _param[1], b = tmp === void 0 ? a : tmp;
 })([
diff --git a/crates/swc/tests/tsc-references/destructuringAssignabilityCheck.1.normal.js b/crates/swc/tests/tsc-references/destructuringAssignabilityCheck.1.normal.js
index fcd0c14b1d52..786e1d0d3710 100644
--- a/crates/swc/tests/tsc-references/destructuringAssignabilityCheck.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringAssignabilityCheck.1.normal.js
@@ -1,7 +1,7 @@
 //// [destructuringAssignabilityCheck.ts]
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 import _throw from "@swc/helpers/src/_throw.mjs";
-var ref = _sliced_to_array({}, 0); // should be error
+var _ref = _sliced_to_array({}, 0); // should be error
 var undefined = undefined !== null ? undefined : _throw(new TypeError("Cannot destructure undefined")); // error correctly
 (function(param) {
     var _param = _sliced_to_array(param, 0);
@@ -19,5 +19,5 @@ function bar(param) {
     var _param = _sliced_to_array(param, 0);
     return 0;
 }
-var ref1 = 1, ref1 = ref1 !== null ? ref1 : _throw(new TypeError("Cannot destructure undefined"));
-var ref2 = _sliced_to_array({}, 0);
+var _ref1 = 1, _ref1 = _ref1 !== null ? _ref1 : _throw(new TypeError("Cannot destructure undefined"));
+var _ref2 = _sliced_to_array({}, 0);
diff --git a/crates/swc/tests/tsc-references/destructuringAssignabilityCheck.2.minified.js b/crates/swc/tests/tsc-references/destructuringAssignabilityCheck.2.minified.js
index f3bc3d3bdf13..daaa21caf033 100644
--- a/crates/swc/tests/tsc-references/destructuringAssignabilityCheck.2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringAssignabilityCheck.2.minified.js
@@ -6,5 +6,5 @@ var undefined = undefined;
 _sliced_to_array({}, 0), function(param) {
     var param = null !== param ? param : _throw(new TypeError("Cannot destructure undefined"));
 }(undefined);
-var ref = 1, ref = null !== ref ? ref : _throw(new TypeError("Cannot destructure undefined"));
+var _ref = 1, _ref = null !== _ref ? _ref : _throw(new TypeError("Cannot destructure undefined"));
 _sliced_to_array({}, 0);
diff --git a/crates/swc/tests/tsc-references/destructuringCatch.1.normal.js b/crates/swc/tests/tsc-references/destructuringCatch.1.normal.js
index 52d8226364a0..beee070403e8 100644
--- a/crates/swc/tests/tsc-references/destructuringCatch.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringCatch.1.normal.js
@@ -28,7 +28,7 @@ try {
         }
     ];
 } catch (param2) {
-    var _param1 = _sliced_to_array(param2, 1), ref = _param1[0], _x = _sliced_to_array(ref.x, 1), y = _x[0], z = ref.z;
+    var _param1 = _sliced_to_array(param2, 1), _param_ = _param1[0], _param__x = _sliced_to_array(_param_.x, 1), y = _param__x[0], z = _param_.z;
     y + z;
 }
 // Test of comment ranges. A fix to GH#11755 should update this.
diff --git a/crates/swc/tests/tsc-references/destructuringCatch.2.minified.js b/crates/swc/tests/tsc-references/destructuringCatch.2.minified.js
index f74a66759220..89d591858de6 100644
--- a/crates/swc/tests/tsc-references/destructuringCatch.2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringCatch.2.minified.js
@@ -27,6 +27,6 @@ try {
         }
     ];
 } catch (param2) {
-    var ref = _sliced_to_array(param2, 1)[0];
-    _sliced_to_array(ref.x, 1)[0], ref.z;
+    var _param_ = _sliced_to_array(param2, 1)[0];
+    _sliced_to_array(_param_.x, 1)[0], _param_.z;
 }
diff --git a/crates/swc/tests/tsc-references/destructuringControlFlow.1.normal.js b/crates/swc/tests/tsc-references/destructuringControlFlow.1.normal.js
index d9920181003f..c0371761b784 100644
--- a/crates/swc/tests/tsc-references/destructuringControlFlow.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringControlFlow.1.normal.js
@@ -36,7 +36,7 @@ function f4() {
     var ref1;
     ref1 = 0, x = ref1["x" + ""], ref1; // Errpr
 }
-var ref = [
+var _ref = [
     "foo"
-], key = ref[0], value = ref[1];
+], key = _ref[0], value = _ref[1];
 value.toUpperCase(); // Error
diff --git a/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es2015).1.normal.js
index 1c89ed7a711d..268d63f16648 100644
--- a/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es2015).1.normal.js
@@ -14,8 +14,8 @@ let [{ [order(1)]: y  } = order(0)] = [
 // order(0) should evaluate first (destructuring of object literal {})
 // order(1) should evaluate next (initializer because property is undefined)
 // order(2) should evaluate last (evaluate object binding pattern from initializer)
-let _ref = {}, key = order(0), key1 = order(2), { [key]: { [key1]: z  } = order(1)  } = _ref, w = _object_without_properties(_ref, [
-    key
+let _ref = {}, _order = order(0), _order1 = order(2), { [_order]: { [_order1]: z  } = order(1)  } = _ref, w = _object_without_properties(_ref, [
+    _order
 ].map(_to_property_key));
 // https://github.com/microsoft/TypeScript/issues/39181
 // b = a must occur *after* 'a' has been assigned
diff --git a/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es2015).2.minified.js b/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es2015).2.minified.js
index 7386316131d3..9ba045803299 100644
--- a/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es2015).2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es2015).2.minified.js
@@ -4,9 +4,9 @@ import _object_without_properties from "@swc/helpers/src/_object_without_propert
 import _to_property_key from "@swc/helpers/src/_to_property_key.mjs";
 let trace = [], order = (n)=>trace.push(n), [{ [order(1)]: x  } = order(0)] = [], [{ [order(1)]: y  } = order(0)] = [
     {}
-], _ref = {}, key = order(0), key1 = order(2), { [key]: { [key1]: z  } = order(1)  } = _ref;
+], _ref = {}, _order = order(0), _order1 = order(2), { [_order]: { [_order1]: z  } = order(1)  } = _ref;
 _object_without_properties(_ref, [
-    key
+    _order
 ].map(_to_property_key));
 let _ref1 = [
     {
diff --git a/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es5).1.normal.js b/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es5).1.normal.js
index 7dfe3b9b8af9..3793fccac709 100644
--- a/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es5).1.normal.js
@@ -10,19 +10,19 @@ var order = function(n) {
     return trace.push(n);
 };
 // order(0) should evaluate before order(1) because the first element is undefined
-var ref = [], tmp = ref[0], ref1 = tmp === void 0 ? order(0) : tmp, x = ref1[order(1)];
+var _ref = [], tmp = _ref[0], _ref1 = tmp === void 0 ? order(0) : tmp, x = _ref1[order(1)];
 // order(0) should not evaluate because the first element is defined
-var tmp1 = {}, ref2 = tmp1 === void 0 ? order(0) : tmp1, y = ref2[order(1)];
+var tmp1 = {}, _ref2 = tmp1 === void 0 ? order(0) : tmp1, y = _ref2[order(1)];
 // order(0) should evaluate first (destructuring of object literal {})
 // order(1) should evaluate next (initializer because property is undefined)
 // order(2) should evaluate last (evaluate object binding pattern from initializer)
-var _ref = {}, key = order(0), key1 = order(2), tmp2 = _ref[key], ref3 = tmp2 === void 0 ? order(1) : tmp2, z = ref3[key1], w = _object_without_properties(_ref, [
-    key
+var _ref3 = {}, _order = order(0), _order1 = order(2), tmp2 = _ref3[_order], _ref4 = tmp2 === void 0 ? order(1) : tmp2, z = _ref4[_order1], w = _object_without_properties(_ref3, [
+    _order
 ].map(_to_property_key));
 // https://github.com/microsoft/TypeScript/issues/39181
 // b = a must occur *after* 'a' has been assigned
-var _ref1 = [
+var _ref5 = [
     {
         x: 1
     }
-], __ref = _sliced_to_array(_ref1, 2), ref4 = __ref[0], ref4 = ref4 !== null ? ref4 : _throw(new TypeError("Cannot destructure undefined")), tmp3 = __ref[1], b = tmp3 === void 0 ? a : tmp3, a = _extends({}, _ref1[0]);
+], _ref6 = _sliced_to_array(_ref5, 2), _ref_ = _ref6[0], _ref_ = _ref_ !== null ? _ref_ : _throw(new TypeError("Cannot destructure undefined")), tmp3 = _ref6[1], b = tmp3 === void 0 ? a : tmp3, a = _extends({}, _ref5[0]);
diff --git a/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es5).2.minified.js b/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es5).2.minified.js
index 2b707545203c..3394bad5f4ba 100644
--- a/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es5).2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringEvaluationOrder(target=es5).2.minified.js
@@ -10,13 +10,13 @@ var trace = [], order = function(n) {
 (void 0 === tmp ? order(0) : tmp)[order(1)];
 var tmp1 = {};
 (void 0 === tmp1 ? order(0) : tmp1)[order(1)];
-var _ref = {}, key = order(0), key1 = order(2), tmp2 = _ref[key];
-(void 0 === tmp2 ? order(1) : tmp2)[key1], _object_without_properties(_ref, [
-    key
+var _ref = {}, _order = order(0), _order1 = order(2), tmp2 = _ref[_order];
+(void 0 === tmp2 ? order(1) : tmp2)[_order1], _object_without_properties(_ref, [
+    _order
 ].map(_to_property_key));
 var _ref1 = [
     {
         x: 1
     }
-], __ref = _sliced_to_array(_ref1, 2), ref = __ref[0], ref = null !== ref ? ref : _throw(new TypeError("Cannot destructure undefined"));
-__ref[1], _extends({}, _ref1[0]);
+], _ref2 = _sliced_to_array(_ref1, 2), _ref_ = _ref2[0], _ref_ = null !== _ref_ ? _ref_ : _throw(new TypeError("Cannot destructure undefined"));
+_ref2[1], _extends({}, _ref1[0]);
diff --git a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment1ES5.1.normal.js b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment1ES5.1.normal.js
index 270491fa6ed2..818fcb7cd1b3 100644
--- a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment1ES5.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment1ES5.1.normal.js
@@ -11,24 +11,24 @@ var a2 = {}.a2;
 var b1 = {
     b1: 1
 }.b1;
-var ref = {
+var _ref = {
     b2: {
         b21: "world"
     }
-}, tmp = ref.b2, b21 = (tmp === void 0 ? {
+}, tmp = _ref.b2, b21 = (tmp === void 0 ? {
     b21: "string"
 } : tmp).b21;
-var ref1 = {
+var _ref1 = {
     1: "string"
-}, b3 = ref1[1];
-var ref2 = {
+}, b3 = _ref1[1];
+var _ref2 = {
     b4: 100000
-}, _b4 = ref2.b4, b4 = _b4 === void 0 ? 1 : _b4;
-var ref3 = {
+}, _ref_b4 = _ref2.b4, b4 = _ref_b4 === void 0 ? 1 : _ref_b4;
+var _ref3 = {
     b5: {
         b52: b52
     }
-}, b52 = ref3.b5.b52;
+}, b52 = _ref3.b5.b52;
 function foo() {
     return {
         1: true
@@ -39,12 +39,12 @@ function bar() {
         2: true
     };
 }
-var ref4 = foo(), c0 = ref4[1];
-var ref5 = bar(), c1 = ref5[1];
+var _foo = foo(), c0 = _foo[1];
+var _bar = bar(), c1 = _bar[1];
 function foo1() {
     return {
         "prop1": 2
     };
 }
-var ref6 = foo1(), d1 = ref6["prop1"];
-var ref7 = foo1(), d1 = ref7["prop2"];
+var _foo1 = foo1(), d1 = _foo1["prop1"];
+var _foo11 = foo1(), d1 = _foo11["prop2"];
diff --git a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment4.1.normal.js b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment4.1.normal.js
index da65dcf9e58e..734806a5664f 100644
--- a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment4.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment4.1.normal.js
@@ -1,3 +1,3 @@
 //// [destructuringObjectBindingPatternAndAssignment4.ts]
-var ref = {}, _a = ref.a, a = _a === void 0 ? 1 : _a, _b = ref.b, b = _b === void 0 ? 2 : _b, _c = ref.c, c = _c === void 0 ? b : _c, _d = ref.d, d = _d === void 0 ? a : _d, _e = ref.e, e = _e === void 0 ? f : _e, _f = ref.f, f = _f === void 0 ? f // error
- : _f;
+var _ref = {}, _ref_a = _ref.a, a = _ref_a === void 0 ? 1 : _ref_a, _ref_b = _ref.b, b = _ref_b === void 0 ? 2 : _ref_b, _ref_c = _ref.c, c = _ref_c === void 0 ? b : _ref_c, _ref_d = _ref.d, d = _ref_d === void 0 ? a : _ref_d, _ref_e = _ref.e, e = _ref_e === void 0 ? f : _ref_e, _ref_f = _ref.f, f = _ref_f === void 0 ? f // error
+ : _ref_f;
diff --git a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment4.2.minified.js b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment4.2.minified.js
index 177c9258f4b0..2c1b890e052f 100644
--- a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment4.2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment4.2.minified.js
@@ -1,2 +1,2 @@
 //// [destructuringObjectBindingPatternAndAssignment4.ts]
-var ref = {}, _f = (ref.a, ref.b, ref.c, ref.d, ref.e, ref.f), f = void 0 === _f ? f : _f;
+var _ref = {}, _ref_f = (_ref.a, _ref.b, _ref.c, _ref.d, _ref.e, _ref.f), f = void 0 === _ref_f ? f : _ref_f;
diff --git a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment6(target=es5).1.normal.js b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment6(target=es5).1.normal.js
index 2f3af9cf1b5d..2807d624635f 100644
--- a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment6(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment6(target=es5).1.normal.js
@@ -2,8 +2,8 @@
 import _define_property from "@swc/helpers/src/_define_property.mjs";
 var a = "a";
 var b = "b";
-var ref = function() {
+var _ref = function() {
     var _obj;
     return _obj = {}, _define_property(_obj, a, 1), _define_property(_obj, b, 1), _obj;
-}(), aVal = ref[a], bVal = ref[b];
+}(), aVal = _ref[a], bVal = _ref[b];
 console.log(aVal, bVal);
diff --git a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment6(target=es5).2.minified.js b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment6(target=es5).2.minified.js
index 1ca32065845b..4fc3d251c480 100644
--- a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment6(target=es5).2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment6(target=es5).2.minified.js
@@ -1,7 +1,7 @@
 //// [destructuringObjectBindingPatternAndAssignment6.ts]
 import _define_property from "@swc/helpers/src/_define_property.mjs";
-var ref = function() {
+var _ref = function() {
     var _obj;
     return _define_property(_obj = {}, "a", 1), _define_property(_obj, "b", 1), _obj;
 }();
-console.log(ref.a, ref.b);
+console.log(_ref.a, _ref.b);
diff --git a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment7(target=es5).1.normal.js b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment7(target=es5).1.normal.js
index 7b3343473f15..34469e968762 100644
--- a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment7(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment7(target=es5).1.normal.js
@@ -5,8 +5,8 @@ var K;
     K["a"] = "a";
     K["b"] = "b";
 })(K || (K = {}));
-var ref = function() {
+var _ref = function() {
     var _obj;
     return _obj = {}, _define_property(_obj, K.a, 1), _define_property(_obj, K.b, 1), _obj;
-}(), aVal = ref[K.a], bVal = ref[K.b];
+}(), aVal = _ref[K.a], bVal = _ref[K.b];
 console.log(aVal, bVal);
diff --git a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment7(target=es5).2.minified.js b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment7(target=es5).2.minified.js
index 93fb0f447db0..d9044c828483 100644
--- a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment7(target=es5).2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment7(target=es5).2.minified.js
@@ -3,8 +3,8 @@ import _define_property from "@swc/helpers/src/_define_property.mjs";
 !function(K) {
     K.a = "a", K.b = "b";
 }(K || (K = {}));
-var K, ref = function() {
+var K, _ref = function() {
     var _obj;
     return _define_property(_obj = {}, K.a, 1), _define_property(_obj, K.b, 1), _obj;
 }();
-console.log(ref[K.a], ref[K.b]);
+console.log(_ref[K.a], _ref[K.b]);
diff --git a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment8(target=es5).1.normal.js b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment8(target=es5).1.normal.js
index 14b9e7bae691..a5aad5371470 100644
--- a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment8(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment8(target=es5).1.normal.js
@@ -4,8 +4,8 @@ var K = {
     a: "a",
     b: "b"
 };
-var ref = function() {
+var _ref = function() {
     var _obj;
     return _obj = {}, _define_property(_obj, K.a, 1), _define_property(_obj, K.b, 1), _obj;
-}(), aVal = ref[K.a], bVal = ref[K.b];
+}(), aVal = _ref[K.a], bVal = _ref[K.b];
 console.log(aVal, bVal);
diff --git a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment8(target=es5).2.minified.js b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment8(target=es5).2.minified.js
index ce3d6cff2f66..b95bc31e17ee 100644
--- a/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment8(target=es5).2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringObjectBindingPatternAndAssignment8(target=es5).2.minified.js
@@ -3,8 +3,8 @@ import _define_property from "@swc/helpers/src/_define_property.mjs";
 var K = {
     a: "a",
     b: "b"
-}, ref = function() {
+}, _ref = function() {
     var _obj;
     return _define_property(_obj = {}, K.a, 1), _define_property(_obj, K.b, 1), _obj;
 }();
-console.log(ref[K.a], ref[K.b]);
+console.log(_ref[K.a], _ref[K.b]);
diff --git a/crates/swc/tests/tsc-references/destructuringParameterDeclaration3ES5iterable.1.normal.js b/crates/swc/tests/tsc-references/destructuringParameterDeclaration3ES5iterable.1.normal.js
index 47c847b321ff..073b204f8c57 100644
--- a/crates/swc/tests/tsc-references/destructuringParameterDeclaration3ES5iterable.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringParameterDeclaration3ES5iterable.1.normal.js
@@ -32,10 +32,10 @@ function a5() {
     }
 }
 function a9(param) {
-    var _param = _sliced_to_array(param, 3), a = _param[0], b = _param[1], ref = _sliced_to_array(_param[2], 1), ref1 = _sliced_to_array(ref[0], 1), c = ref1[0];
+    var _param = _sliced_to_array(param, 3), a = _param[0], b = _param[1], _param_ = _sliced_to_array(_param[2], 1), _param__ = _sliced_to_array(_param_[0], 1), c = _param__[0];
 }
 function a10(param) {
-    var _param = _to_array(param), a = _param[0], b = _param[1], ref = _sliced_to_array(_param[2], 1), ref1 = _sliced_to_array(ref[0], 1), c = ref1[0], x = _param.slice(3);
+    var _param = _to_array(param), a = _param[0], b = _param[1], _param_ = _sliced_to_array(_param[2], 1), _param__ = _sliced_to_array(_param_[0], 1), c = _param__[0], x = _param.slice(3);
 }
 function a11(param) {
     var _param = _to_array(param), a = _param[0], b = _param[1], c = _param[2], x = _param.slice(3);
diff --git a/crates/swc/tests/tsc-references/destructuringParameterDeclaration3ES5iterable.2.minified.js b/crates/swc/tests/tsc-references/destructuringParameterDeclaration3ES5iterable.2.minified.js
index ae3f380a2e1e..59f13d5f4714 100644
--- a/crates/swc/tests/tsc-references/destructuringParameterDeclaration3ES5iterable.2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringParameterDeclaration3ES5iterable.2.minified.js
@@ -3,8 +3,8 @@ import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 import _to_array from "@swc/helpers/src/_to_array.mjs";
 import _to_consumable_array from "@swc/helpers/src/_to_consumable_array.mjs";
 function a10(param) {
-    var _param = _to_array(param), ref = (_param[0], _param[1], _sliced_to_array(_param[2], 1));
-    _sliced_to_array(ref[0], 1)[0], _param.slice(3);
+    var _param = _to_array(param), _param_ = (_param[0], _param[1], _sliced_to_array(_param[2], 1));
+    _sliced_to_array(_param_[0], 1)[0], _param.slice(3);
 }
 var E, E1, array = [
     1,
@@ -22,8 +22,8 @@ function foo1() {
 }(_to_consumable_array(array)), (function() {
     for(var _len = arguments.length, x = Array(_len), _key = 0; _key < _len; _key++)x[_key] = arguments[_key];
 }).apply(void 0, _to_consumable_array(array)), function(param) {
-    var _param = _sliced_to_array(param, 3), ref = (_param[0], _param[1], _sliced_to_array(_param[2], 1));
-    _sliced_to_array(ref[0], 1)[0];
+    var _param = _sliced_to_array(param, 3), _param_ = (_param[0], _param[1], _sliced_to_array(_param[2], 1));
+    _sliced_to_array(_param_[0], 1)[0];
 }([
     1,
     2,
diff --git a/crates/swc/tests/tsc-references/destructuringParameterDeclaration8.1.normal.js b/crates/swc/tests/tsc-references/destructuringParameterDeclaration8.1.normal.js
index 8765993bc4b8..ebf6124faf5a 100644
--- a/crates/swc/tests/tsc-references/destructuringParameterDeclaration8.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringParameterDeclaration8.1.normal.js
@@ -2,7 +2,7 @@
 // explicit type annotation should cause `method` to have type 'x' | 'y'
 // both inside and outside `test`.
 function test(param) {
-    var _method = param.method, method = _method === void 0 ? "z" : _method, _nested = param.nested, _p = _nested.p, p = _p === void 0 ? "c" : _p;
+    var _param_method = param.method, method = _param_method === void 0 ? "z" : _param_method, _param_nested = param.nested, _param_nested_p = _param_nested.p, p = _param_nested_p === void 0 ? "c" : _param_nested_p;
     method;
     p;
 }
diff --git a/crates/swc/tests/tsc-references/destructuringSpread.1.normal.js b/crates/swc/tests/tsc-references/destructuringSpread.1.normal.js
index 7797787f1c68..217974f3ddca 100644
--- a/crates/swc/tests/tsc-references/destructuringSpread.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringSpread.1.normal.js
@@ -7,13 +7,13 @@ var x = _object_spread_props(_object_spread({}, {}), {
 var y = _object_spread({
     y: 0
 }, {}).y;
-var ref = _object_spread({
+var _$_object_spread = _object_spread({
     z: 0
 }, {
     a: 0,
     b: 0
-}), z = ref.z, a = ref.a, b = ref.b;
-var ref1 = _object_spread_props(_object_spread({}, _object_spread_props(_object_spread({}, _object_spread_props(_object_spread({}, {
+}), z = _$_object_spread.z, a = _$_object_spread.a, b = _$_object_spread.b;
+var _$_object_spread_props = _object_spread_props(_object_spread({}, _object_spread_props(_object_spread({}, _object_spread_props(_object_spread({}, {
     c: 0
 }), {
     d: 0
@@ -21,4 +21,4 @@ var ref1 = _object_spread_props(_object_spread({}, _object_spread_props(_object_
     e: 0
 })), {
     f: 0
-}), c = ref1.c, d = ref1.d, e = ref1.e, f = ref1.f, g = ref1.g;
+}), c = _$_object_spread_props.c, d = _$_object_spread_props.d, e = _$_object_spread_props.e, f = _$_object_spread_props.f, g = _$_object_spread_props.g;
diff --git a/crates/swc/tests/tsc-references/destructuringSpread.2.minified.js b/crates/swc/tests/tsc-references/destructuringSpread.2.minified.js
index 2c6fbb29cf57..b0dc40098acd 100644
--- a/crates/swc/tests/tsc-references/destructuringSpread.2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringSpread.2.minified.js
@@ -6,14 +6,14 @@ _object_spread_props(_object_spread({}, {}), {
 }).x, _object_spread({
     y: 0
 }, {}).y;
-var ref = _object_spread({
+var _$_object_spread = _object_spread({
     z: 0
 }, {
     a: 0,
     b: 0
 });
-ref.z, ref.a, ref.b;
-var ref1 = _object_spread_props(_object_spread({}, _object_spread_props(_object_spread({}, _object_spread_props(_object_spread({}, {
+_$_object_spread.z, _$_object_spread.a, _$_object_spread.b;
+var _$_object_spread_props = _object_spread_props(_object_spread({}, _object_spread_props(_object_spread({}, _object_spread_props(_object_spread({}, {
     c: 0
 }), {
     d: 0
@@ -22,4 +22,4 @@ var ref1 = _object_spread_props(_object_spread({}, _object_spread_props(_object_
 })), {
     f: 0
 });
-ref1.c, ref1.d, ref1.e, ref1.f, ref1.g;
+_$_object_spread_props.c, _$_object_spread_props.d, _$_object_spread_props.e, _$_object_spread_props.f, _$_object_spread_props.g;
diff --git a/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5.1.normal.js b/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5.1.normal.js
index 3d63e435c9e7..0e84e1fb41c5 100644
--- a/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5.1.normal.js
@@ -3,18 +3,18 @@
 //      If the declaration includes a type annotation, T is that type.
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 import _to_consumable_array from "@swc/helpers/src/_to_consumable_array.mjs";
-var ref = {
+var _ref = {
     a1: 10,
     a2: "world"
-}, a1 = ref.a1, a2 = ref.a2;
+}, a1 = _ref.a1, a2 = _ref.a2;
 var a3 = 1, a4 = "hello", a5 = true;
 // The type T associated with a destructuring variable declaration is determined as follows:
 //      Otherwise, if the declaration includes an initializer expression, T is the type of that initializer expression.
-var ref1 = {
+var _ref1 = {
     b1: {
         b11: "world"
     }
-}, tmp = ref1.b1, b11 = (tmp === void 0 ? {
+}, tmp = _ref1.b1, b11 = (tmp === void 0 ? {
     b11: "string"
 } : tmp).b11;
 var temp = {
@@ -25,11 +25,11 @@ var tmp1 = 3, b2 = tmp1 === void 0 ? 3 : tmp1, tmp2 = false, b3 = tmp2 === void
     t1: false,
     t2: "hello"
 }, b4 = tmp3 === void 0 ? temp : tmp3;
-var ref2 = [
+var _ref2 = [
     undefined,
     undefined,
     undefined
-], tmp4 = ref2[0], b5 = tmp4 === void 0 ? 3 : tmp4, tmp5 = ref2[1], b6 = tmp5 === void 0 ? true : tmp5, tmp6 = ref2[2], b7 = tmp6 === void 0 ? temp : tmp6;
+], tmp4 = _ref2[0], b5 = tmp4 === void 0 ? 3 : tmp4, tmp5 = _ref2[1], b6 = tmp5 === void 0 ? true : tmp5, tmp6 = _ref2[2], b7 = tmp6 === void 0 ? temp : tmp6;
 // The type T associated with a binding element is determined as follows:
 //      If the binding element is a rest element, T is an array type with
 //          an element type E, where E is the type of the numeric index signature of S.
@@ -57,12 +57,12 @@ var temp1 = [
     false,
     true
 ];
-var ref3 = _sliced_to_array([
+var _concat = _sliced_to_array([
     1,
     "string"
-].concat(_to_consumable_array(temp1)), 2), d3 = ref3[0], d4 = ref3[1];
+].concat(_to_consumable_array(temp1)), 2), d3 = _concat[0], d4 = _concat[1];
 //  Combining both forms of destructuring,
-var ref4 = {
+var _ref3 = {
     e: [
         1,
         2,
@@ -71,11 +71,11 @@ var ref4 = {
             b4: 0
         }
     ]
-}, _e = _sliced_to_array(ref4.e, 3), e1 = _e[0], e2 = _e[1], tmp7 = _e[2], e3 = tmp7 === void 0 ? {
+}, _ref_e = _sliced_to_array(_ref3.e, 3), e1 = _ref_e[0], e2 = _ref_e[1], tmp7 = _ref_e[2], e3 = tmp7 === void 0 ? {
     b1: 1000,
     b4: 200
 } : tmp7;
-var ref5 = {
+var _ref4 = {
     f: [
         1,
         2,
@@ -84,29 +84,29 @@ var ref5 = {
             f5: 0
         }
     ]
-}, _f = _sliced_to_array(ref5.f, 3), f1 = _f[0], f2 = _f[1], ref6 = _f[2], f4 = ref6.f3, f5 = ref6.f5;
+}, _ref_f = _sliced_to_array(_ref4.f, 3), f1 = _ref_f[0], f2 = _ref_f[1], _ref_f_ = _ref_f[2], f4 = _ref_f_.f3, f5 = _ref_f_.f5;
 // When a destructuring variable declaration, binding property, or binding element specifies
 // an initializer expression, the type of the initializer expression is required to be assignable
 // to the widened form of the type associated with the destructuring variable declaration, binding property, or binding element.
-var ref7 = {
+var _ref5 = {
     g: {
         g1: [
             1,
             2
         ]
     }
-}, _g = ref7.g, _g1 = _g.g1, g1 = _g1 === void 0 ? [
+}, _ref_g = _ref5.g, _ref_g_g1 = _ref_g.g1, g1 = _ref_g_g1 === void 0 ? [
     undefined,
     null
-] : _g1;
-var ref8 = {
+] : _ref_g_g1;
+var _ref6 = {
     h: {
         h1: [
             1,
             2
         ]
     }
-}, _h = ref8.h, _h1 = _h.h1, h1 = _h1 === void 0 ? [
+}, _ref_h = _ref6.h, _ref_h_h1 = _ref_h.h1, h1 = _ref_h_h1 === void 0 ? [
     undefined,
     null
-] : _h1;
+] : _ref_h_h1;
diff --git a/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5.2.minified.js b/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5.2.minified.js
index 7d23e0dba716..f7f5997e3c73 100644
--- a/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5.2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5.2.minified.js
@@ -1,24 +1,24 @@
 //// [destructuringVariableDeclaration1ES5.ts]
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 import _to_consumable_array from "@swc/helpers/src/_to_consumable_array.mjs";
-var ref = {
+var _ref = {
     a1: 10,
     a2: "world"
 };
-ref.a1, ref.a2;
+_ref.a1, _ref.a2;
 var tmp = {
     b11: "world"
 };
 (void 0 === tmp ? {
     b11: "string"
 } : tmp).b11;
-var ref1 = [
+var _ref1 = [
     void 0,
     void 0,
     void 0
 ];
-ref1[0], ref1[1], ref1[2];
-var ref2 = _sliced_to_array([
+_ref1[0], _ref1[1], _ref1[2];
+var _concat = _sliced_to_array([
     1,
     "string"
 ].concat(_to_consumable_array([
@@ -26,8 +26,8 @@ var ref2 = _sliced_to_array([
     !1,
     !0
 ])), 2);
-ref2[0], ref2[1];
-var _e = _sliced_to_array([
+_concat[0], _concat[1];
+var _ref_e = _sliced_to_array([
     1,
     2,
     {
@@ -35,13 +35,13 @@ var _e = _sliced_to_array([
         b4: 0
     }
 ], 3);
-_e[0], _e[1], _e[2];
-var _f = _sliced_to_array([
+_ref_e[0], _ref_e[1], _ref_e[2];
+var _ref_f = _sliced_to_array([
     1,
     2,
     {
         f3: 4,
         f5: 0
     }
-], 3), ref3 = (_f[0], _f[1], _f[2]);
-ref3.f3, ref3.f5;
+], 3), _ref_f_ = (_ref_f[0], _ref_f[1], _ref_f[2]);
+_ref_f_.f3, _ref_f_.f5;
diff --git a/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5iterable.1.normal.js b/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5iterable.1.normal.js
index 0533adde9e65..97e010df43fe 100644
--- a/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5iterable.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5iterable.1.normal.js
@@ -3,18 +3,18 @@
 //      If the declaration includes a type annotation, T is that type.
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 import _to_consumable_array from "@swc/helpers/src/_to_consumable_array.mjs";
-var ref = {
+var _ref = {
     a1: 10,
     a2: "world"
-}, a1 = ref.a1, a2 = ref.a2;
+}, a1 = _ref.a1, a2 = _ref.a2;
 var a3 = 1, a4 = "hello", a5 = true;
 // The type T associated with a destructuring variable declaration is determined as follows:
 //      Otherwise, if the declaration includes an initializer expression, T is the type of that initializer expression.
-var ref1 = {
+var _ref1 = {
     b1: {
         b11: "world"
     }
-}, tmp = ref1.b1, b11 = (tmp === void 0 ? {
+}, tmp = _ref1.b1, b11 = (tmp === void 0 ? {
     b11: "string"
 } : tmp).b11;
 var temp = {
@@ -25,11 +25,11 @@ var tmp1 = 3, b2 = tmp1 === void 0 ? 3 : tmp1, tmp2 = false, b3 = tmp2 === void
     t1: false,
     t2: "hello"
 }, b4 = tmp3 === void 0 ? temp : tmp3;
-var ref2 = [
+var _ref2 = [
     undefined,
     undefined,
     undefined
-], tmp4 = ref2[0], b5 = tmp4 === void 0 ? 3 : tmp4, tmp5 = ref2[1], b6 = tmp5 === void 0 ? true : tmp5, tmp6 = ref2[2], b7 = tmp6 === void 0 ? temp : tmp6;
+], tmp4 = _ref2[0], b5 = tmp4 === void 0 ? 3 : tmp4, tmp5 = _ref2[1], b6 = tmp5 === void 0 ? true : tmp5, tmp6 = _ref2[2], b7 = tmp6 === void 0 ? temp : tmp6;
 // The type T associated with a binding element is determined as follows:
 //      If the binding element is a rest element, T is an array type with
 //          an element type E, where E is the type of the numeric index signature of S.
@@ -57,12 +57,12 @@ var temp1 = [
     false,
     true
 ];
-var ref3 = _sliced_to_array([
+var _concat = _sliced_to_array([
     1,
     "string"
-].concat(_to_consumable_array(temp1)), 2), d3 = ref3[0], d4 = ref3[1];
+].concat(_to_consumable_array(temp1)), 2), d3 = _concat[0], d4 = _concat[1];
 //  Combining both forms of destructuring,
-var ref4 = {
+var _ref3 = {
     e: [
         1,
         2,
@@ -71,11 +71,11 @@ var ref4 = {
             b4: 0
         }
     ]
-}, _e = _sliced_to_array(ref4.e, 3), e1 = _e[0], e2 = _e[1], tmp7 = _e[2], e3 = tmp7 === void 0 ? {
+}, _ref_e = _sliced_to_array(_ref3.e, 3), e1 = _ref_e[0], e2 = _ref_e[1], tmp7 = _ref_e[2], e3 = tmp7 === void 0 ? {
     b1: 1000,
     b4: 200
 } : tmp7;
-var ref5 = {
+var _ref4 = {
     f: [
         1,
         2,
@@ -84,29 +84,29 @@ var ref5 = {
             f5: 0
         }
     ]
-}, _f = _sliced_to_array(ref5.f, 3), f1 = _f[0], f2 = _f[1], ref6 = _f[2], f4 = ref6.f3, f5 = ref6.f5;
+}, _ref_f = _sliced_to_array(_ref4.f, 3), f1 = _ref_f[0], f2 = _ref_f[1], _ref_f_ = _ref_f[2], f4 = _ref_f_.f3, f5 = _ref_f_.f5;
 // When a destructuring variable declaration, binding property, or binding element specifies
 // an initializer expression, the type of the initializer expression is required to be assignable
 // to the widened form of the type associated with the destructuring variable declaration, binding property, or binding element.
-var ref7 = {
+var _ref5 = {
     g: {
         g1: [
             1,
             2
         ]
     }
-}, _g = ref7.g, _g1 = _g.g1, g1 = _g1 === void 0 ? [
+}, _ref_g = _ref5.g, _ref_g_g1 = _ref_g.g1, g1 = _ref_g_g1 === void 0 ? [
     undefined,
     null
-] : _g1;
-var ref8 = {
+] : _ref_g_g1;
+var _ref6 = {
     h: {
         h1: [
             1,
             2
         ]
     }
-}, _h = ref8.h, _h1 = _h.h1, h1 = _h1 === void 0 ? [
+}, _ref_h = _ref6.h, _ref_h_h1 = _ref_h.h1, h1 = _ref_h_h1 === void 0 ? [
     undefined,
     null
-] : _h1;
+] : _ref_h_h1;
diff --git a/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5iterable.2.minified.js b/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5iterable.2.minified.js
index c9918d372c6f..f992333bef1e 100644
--- a/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5iterable.2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringVariableDeclaration1ES5iterable.2.minified.js
@@ -1,24 +1,24 @@
 //// [destructuringVariableDeclaration1ES5iterable.ts]
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 import _to_consumable_array from "@swc/helpers/src/_to_consumable_array.mjs";
-var ref = {
+var _ref = {
     a1: 10,
     a2: "world"
 };
-ref.a1, ref.a2;
+_ref.a1, _ref.a2;
 var tmp = {
     b11: "world"
 };
 (void 0 === tmp ? {
     b11: "string"
 } : tmp).b11;
-var ref1 = [
+var _ref1 = [
     void 0,
     void 0,
     void 0
 ];
-ref1[0], ref1[1], ref1[2];
-var ref2 = _sliced_to_array([
+_ref1[0], _ref1[1], _ref1[2];
+var _concat = _sliced_to_array([
     1,
     "string"
 ].concat(_to_consumable_array([
@@ -26,8 +26,8 @@ var ref2 = _sliced_to_array([
     !1,
     !0
 ])), 2);
-ref2[0], ref2[1];
-var _e = _sliced_to_array([
+_concat[0], _concat[1];
+var _ref_e = _sliced_to_array([
     1,
     2,
     {
@@ -35,13 +35,13 @@ var _e = _sliced_to_array([
         b4: 0
     }
 ], 3);
-_e[0], _e[1], _e[2];
-var _f = _sliced_to_array([
+_ref_e[0], _ref_e[1], _ref_e[2];
+var _ref_f = _sliced_to_array([
     1,
     2,
     {
         f3: 4,
         f5: 0
     }
-], 3), ref3 = (_f[0], _f[1], _f[2]);
-ref3.f3, ref3.f5;
+], 3), _ref_f_ = (_ref_f[0], _ref_f[1], _ref_f[2]);
+_ref_f_.f3, _ref_f_.f5;
diff --git a/crates/swc/tests/tsc-references/destructuringVariableDeclaration2.1.normal.js b/crates/swc/tests/tsc-references/destructuringVariableDeclaration2.1.normal.js
index 5e8e321c8557..54c286863e65 100644
--- a/crates/swc/tests/tsc-references/destructuringVariableDeclaration2.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringVariableDeclaration2.1.normal.js
@@ -1,11 +1,11 @@
 //// [destructuringVariableDeclaration2.ts]
 // The type T associated with a destructuring variable declaration is determined as follows:
 //      If the declaration includes a type annotation, T is that type.
-var ref // Error
+var _ref // Error
  = {
     a1: true,
     a2: 1
-}, a1 = ref.a1, a2 = ref.a2;
+}, a1 = _ref.a1, a2 = _ref.a2;
 var a3 = 1, a4 = false, a5 = true; // Error
 // The type T associated with a destructuring variable declaration is determined as follows:
 //      Otherwise, if the declaration includes an initializer expression, T is the type of that initializer expression.
@@ -20,25 +20,25 @@ var tmp = 3, b0 = tmp === void 0 ? 3 : tmp, tmp1 = false, b1 = tmp1 === void 0 ?
 // The type T associated with a binding element is determined as follows:
 //      If the binding element is a rest element, T is an array type with
 //          an element type E, where E is the type of the numeric index signature of S.
-var ref1 = [
+var _ref1 = [
     1,
     2,
     {
         c3: 4,
         c5: 0
     }
-], c1 = ref1[0], c2 = ref1[1], ref2 = ref1[2], c4 = ref2.c3, c5 = ref2.c5, c6 = ref1.slice(4); // Error
+], c1 = _ref1[0], c2 = _ref1[1], _ref_ = _ref1[2], c4 = _ref_.c3, c5 = _ref_.c5, c6 = _ref1.slice(4); // Error
 // When a destructuring variable declaration, binding property, or binding element specifies
 // an initializer expression, the type of the initializer expression is required to be assignable
 // to the widened form of the type associated with the destructuring variable declaration, binding property, or binding element.
-var ref3 = {
+var _ref2 = {
     d: {
         d1: [
             1,
             2
         ]
     }
-}, _d = ref3.d, _d1 = _d.d1, d1 = _d1 === void 0 ? [
+}, _ref_d = _ref2.d, _ref_d_d1 = _ref_d.d1, d1 = _ref_d_d1 === void 0 ? [
     "string",
     null
-] : _d1; // Error
+] : _ref_d_d1; // Error
diff --git a/crates/swc/tests/tsc-references/destructuringVariableDeclaration2.2.minified.js b/crates/swc/tests/tsc-references/destructuringVariableDeclaration2.2.minified.js
index 318e86d16711..a329a0e651df 100644
--- a/crates/swc/tests/tsc-references/destructuringVariableDeclaration2.2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringVariableDeclaration2.2.minified.js
@@ -1,15 +1,15 @@
 //// [destructuringVariableDeclaration2.ts]
-var ref = {
+var _ref = {
     a1: !0,
     a2: 1
 };
-ref.a1, ref.a2;
-var ref1 = [
+_ref.a1, _ref.a2;
+var _ref1 = [
     1,
     2,
     {
         c3: 4,
         c5: 0
     }
-], ref2 = (ref1[0], ref1[1], ref1[2]);
-ref2.c3, ref2.c5, ref1.slice(4);
+], _ref_ = (_ref1[0], _ref1[1], _ref1[2]);
+_ref_.c3, _ref_.c5, _ref1.slice(4);
diff --git a/crates/swc/tests/tsc-references/destructuringWithLiteralInitializers.1.normal.js b/crates/swc/tests/tsc-references/destructuringWithLiteralInitializers.1.normal.js
index 70ba52e25e1f..ba1bba92456f 100644
--- a/crates/swc/tests/tsc-references/destructuringWithLiteralInitializers.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringWithLiteralInitializers.1.normal.js
@@ -10,7 +10,7 @@ f1({
 });
 // (arg: { x: any, y?: number }) => void
 function f2(param) {
-    var x = param.x, _y = param.y, y = _y === void 0 ? 0 : _y;
+    var x = param.x, _param_y = param.y, y = _param_y === void 0 ? 0 : _param_y;
 }
 f2({
     x: 1
@@ -21,7 +21,7 @@ f2({
 });
 // (arg: { x?: number, y?: number }) => void
 function f3(param) {
-    var _x = param.x, x = _x === void 0 ? 0 : _x, _y = param.y, y = _y === void 0 ? 0 : _y;
+    var _param_x = param.x, x = _param_x === void 0 ? 0 : _param_x, _param_y = param.y, y = _param_y === void 0 ? 0 : _param_y;
 }
 f3({});
 f3({
@@ -36,10 +36,10 @@ f3({
 });
 // (arg?: { x: number, y: number }) => void
 function f4() {
-    var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
+    var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
         x: 0,
         y: 0
-    }, x = ref.x, y = ref.y;
+    }, x = _ref.x, y = _ref.y;
 }
 f4();
 f4({
@@ -48,9 +48,9 @@ f4({
 });
 // (arg?: { x: number, y?: number }) => void
 function f5() {
-    var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
+    var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
         x: 0
-    }, x = ref.x, _y = ref.y, y = _y === void 0 ? 0 : _y;
+    }, x = _ref.x, _ref_y = _ref.y, y = _ref_y === void 0 ? 0 : _ref_y;
 }
 f5();
 f5({
@@ -62,7 +62,7 @@ f5({
 });
 // (arg?: { x?: number, y?: number }) => void
 function f6() {
-    var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {}, _x = ref.x, x = _x === void 0 ? 0 : _x, _y = ref.y, y = _y === void 0 ? 0 : _y;
+    var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {}, _ref_x = _ref.x, x = _ref_x === void 0 ? 0 : _ref_x, _ref_y = _ref.y, y = _ref_y === void 0 ? 0 : _ref_y;
 }
 f6();
 f6({});
@@ -78,9 +78,9 @@ f6({
 });
 // (arg?: { a: { x?: number, y?: number } }) => void
 function f7() {
-    var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
+    var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
         a: {}
-    }, _a = ref.a, _x = _a.x, x = _x === void 0 ? 0 : _x, _y = _a.y, y = _y === void 0 ? 0 : _y;
+    }, _ref_a = _ref.a, _ref_a_x = _ref_a.x, x = _ref_a_x === void 0 ? 0 : _ref_a_x, _ref_a_y = _ref_a.y, y = _ref_a_y === void 0 ? 0 : _ref_a_y;
 }
 f7();
 f7({
@@ -120,10 +120,10 @@ g2([
 ]);
 // (arg?: [number, number]) => void
 function g3() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
         0,
         0
-    ], 2), x = ref[0], y = ref[1];
+    ], 2), x = _ref[0], y = _ref[1];
 }
 g3();
 g3([
@@ -132,9 +132,9 @@ g3([
 ]);
 // (arg?: [number, number]) => void
 function g4() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
         0
-    ], 2), x = ref[0], tmp = ref[1], y = tmp === void 0 ? 0 : tmp;
+    ], 2), x = _ref[0], tmp = _ref[1], y = tmp === void 0 ? 0 : tmp;
 }
 g4();
 g4([
@@ -143,7 +143,7 @@ g4([
 ]);
 // (arg?: [number, number]) => void
 function g5() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [], 2), tmp = ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = ref[1], y = tmp1 === void 0 ? 0 : tmp1;
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [], 2), tmp = _ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = _ref[1], y = tmp1 === void 0 ? 0 : tmp1;
 }
 g5();
 g5([
diff --git a/crates/swc/tests/tsc-references/destructuringWithLiteralInitializers.2.minified.js b/crates/swc/tests/tsc-references/destructuringWithLiteralInitializers.2.minified.js
index 65e69476392c..13182c26934b 100644
--- a/crates/swc/tests/tsc-references/destructuringWithLiteralInitializers.2.minified.js
+++ b/crates/swc/tests/tsc-references/destructuringWithLiteralInitializers.2.minified.js
@@ -1,44 +1,44 @@
 //// [destructuringWithLiteralInitializers.ts]
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 function f4() {
-    var ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {
+    var _ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {
         x: 0,
         y: 0
     };
-    ref.x, ref.y;
+    _ref.x, _ref.y;
 }
 function f5() {
-    var ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {
+    var _ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {
         x: 0
     };
-    ref.x, ref.y;
+    _ref.x, _ref.y;
 }
 function f6() {
-    var ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {};
-    ref.x, ref.y;
+    var _ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {};
+    _ref.x, _ref.y;
 }
 function f7() {
-    var ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {
+    var _ref = arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : {
         a: {}
-    }, _a = ref.a;
-    _a.x, _a.y;
+    }, _ref_a = _ref.a;
+    _ref_a.x, _ref_a.y;
 }
 function g3() {
-    var ref = _sliced_to_array(arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : [
         0,
         0
     ], 2);
-    ref[0], ref[1];
+    _ref[0], _ref[1];
 }
 function g4() {
-    var ref = _sliced_to_array(arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : [
         0
     ], 2);
-    ref[0], ref[1];
+    _ref[0], _ref[1];
 }
 function g5() {
-    var ref = _sliced_to_array(arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : [], 2);
-    ref[0], ref[1];
+    var _ref = _sliced_to_array(arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : [], 2);
+    _ref[0], _ref[1];
 }
 !function(param) {
     param.x, param.y;
diff --git a/crates/swc/tests/tsc-references/destructuringWithLiteralInitializers2.1.normal.js b/crates/swc/tests/tsc-references/destructuringWithLiteralInitializers2.1.normal.js
index b41f6492d516..a8fa2da3a2c4 100644
--- a/crates/swc/tests/tsc-references/destructuringWithLiteralInitializers2.1.normal.js
+++ b/crates/swc/tests/tsc-references/destructuringWithLiteralInitializers2.1.normal.js
@@ -4,84 +4,84 @@ function f00(param) {
     var _param = _sliced_to_array(param, 2), x = _param[0], y = _param[1];
 }
 function f01() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [], 2), x = ref[0], y = ref[1];
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [], 2), x = _ref[0], y = _ref[1];
 }
 function f02() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
         1
-    ], 2), x = ref[0], y = ref[1];
+    ], 2), x = _ref[0], y = _ref[1];
 }
 function f03() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
         1,
         "foo"
-    ], 2), x = ref[0], y = ref[1];
+    ], 2), x = _ref[0], y = _ref[1];
 }
 function f10(param) {
     var _param = _sliced_to_array(param, 2), tmp = _param[0], x = tmp === void 0 ? 0 : tmp, y = _param[1];
 }
 function f11() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [], 2), tmp = ref[0], x = tmp === void 0 ? 0 : tmp, y = ref[1];
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [], 2), tmp = _ref[0], x = tmp === void 0 ? 0 : tmp, y = _ref[1];
 }
 function f12() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
         1
-    ], 2), tmp = ref[0], x = tmp === void 0 ? 0 : tmp, y = ref[1];
+    ], 2), tmp = _ref[0], x = tmp === void 0 ? 0 : tmp, y = _ref[1];
 }
 function f13() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
         1,
         "foo"
-    ], 2), tmp = ref[0], x = tmp === void 0 ? 0 : tmp, y = ref[1];
+    ], 2), tmp = _ref[0], x = tmp === void 0 ? 0 : tmp, y = _ref[1];
 }
 function f20(param) {
     var _param = _sliced_to_array(param, 2), tmp = _param[0], x = tmp === void 0 ? 0 : tmp, tmp1 = _param[1], y = tmp1 === void 0 ? "bar" : tmp1;
 }
 function f21() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [], 2), tmp = ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [], 2), tmp = _ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = _ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
 }
 function f22() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
         1
-    ], 2), tmp = ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
+    ], 2), tmp = _ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = _ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
 }
 function f23() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
         1,
         "foo"
-    ], 2), tmp = ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
+    ], 2), tmp = _ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = _ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
 }
 function f30(param) {
     var _param = _sliced_to_array(param, 2), tmp = _param[0], x = tmp === void 0 ? 0 : tmp, tmp1 = _param[1], y = tmp1 === void 0 ? "bar" : tmp1;
 }
 function f31() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [], 2), tmp = ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [], 2), tmp = _ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = _ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
 }
 function f32() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
         nx
-    ], 2), tmp = ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
+    ], 2), tmp = _ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = _ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
 }
 function f33() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
         nx,
         sx
-    ], 2), tmp = ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
+    ], 2), tmp = _ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = _ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
 }
 function f40(param) {
     var _param = _sliced_to_array(param, 2), tmp = _param[0], x = tmp === void 0 ? 0 : tmp, tmp1 = _param[1], y = tmp1 === void 0 ? "bar" : tmp1;
 }
 function f41() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [], 2), tmp = ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [], 2), tmp = _ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = _ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
 }
 function f42() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
         sx
-    ], 2), tmp = ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
+    ], 2), tmp = _ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = _ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
 }
 function f43() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
         sx,
         nx
-    ], 2), tmp = ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
+    ], 2), tmp = _ref[0], x = tmp === void 0 ? 0 : tmp, tmp1 = _ref[1], y = tmp1 === void 0 ? "bar" : tmp1;
 }
diff --git a/crates/swc/tests/tsc-references/elementAccessChain.1.normal.js b/crates/swc/tests/tsc-references/elementAccessChain.1.normal.js
index 59e35e81d41b..d352d3befea3 100644
--- a/crates/swc/tests/tsc-references/elementAccessChain.1.normal.js
+++ b/crates/swc/tests/tsc-references/elementAccessChain.1.normal.js
@@ -1,17 +1,17 @@
 //// [elementAccessChain.ts]
-var ref, ref1, ref2, ref3, ref4, ref5, ref6, ref7, ref8, ref9, ref10, ref11, ref12, ref13, ref14;
+var _o3_b, _o3_b1, _o4_b, _ref, _o4_b1, _ref1, _o5_b, _ref2, _o5_b1, _ref3, _o5_b2, _ref4, _o5_b3, _ref5, _o6;
 o1 === null || o1 === void 0 ? void 0 : o1["b"];
 o2 === null || o2 === void 0 ? void 0 : o2["b"].c;
 o2 === null || o2 === void 0 ? void 0 : o2.b["c"];
-(ref = o3["b"]) === null || ref === void 0 ? void 0 : ref.c;
-(ref1 = o3.b) === null || ref1 === void 0 ? void 0 : ref1["c"];
-(ref3 = (ref2 = o4.b) === null || ref2 === void 0 ? void 0 : ref2["c"].d) === null || ref3 === void 0 ? void 0 : ref3.e;
-(ref5 = (ref4 = o4.b) === null || ref4 === void 0 ? void 0 : ref4["c"].d) === null || ref5 === void 0 ? void 0 : ref5["e"];
-(ref7 = (ref6 = o5.b) === null || ref6 === void 0 ? void 0 : ref6.call(o5)["c"].d) === null || ref7 === void 0 ? void 0 : ref7.e;
-(ref9 = (ref8 = o5.b) === null || ref8 === void 0 ? void 0 : ref8.call(o5)["c"].d) === null || ref9 === void 0 ? void 0 : ref9["e"];
-(ref11 = (ref10 = o5["b"]) === null || ref10 === void 0 ? void 0 : ref10.call(o5)["c"].d) === null || ref11 === void 0 ? void 0 : ref11.e;
-(ref13 = (ref12 = o5["b"]) === null || ref12 === void 0 ? void 0 : ref12.call(o5)["c"].d) === null || ref13 === void 0 ? void 0 : ref13["e"];
-(ref14 = o6()) === null || ref14 === void 0 ? void 0 : ref14["x"];
+(_o3_b = o3["b"]) === null || _o3_b === void 0 ? void 0 : _o3_b.c;
+(_o3_b1 = o3.b) === null || _o3_b1 === void 0 ? void 0 : _o3_b1["c"];
+(_ref = (_o4_b = o4.b) === null || _o4_b === void 0 ? void 0 : _o4_b["c"].d) === null || _ref === void 0 ? void 0 : _ref.e;
+(_ref1 = (_o4_b1 = o4.b) === null || _o4_b1 === void 0 ? void 0 : _o4_b1["c"].d) === null || _ref1 === void 0 ? void 0 : _ref1["e"];
+(_ref2 = (_o5_b = o5.b) === null || _o5_b === void 0 ? void 0 : _o5_b.call(o5)["c"].d) === null || _ref2 === void 0 ? void 0 : _ref2.e;
+(_ref3 = (_o5_b1 = o5.b) === null || _o5_b1 === void 0 ? void 0 : _o5_b1.call(o5)["c"].d) === null || _ref3 === void 0 ? void 0 : _ref3["e"];
+(_ref4 = (_o5_b2 = o5["b"]) === null || _o5_b2 === void 0 ? void 0 : _o5_b2.call(o5)["c"].d) === null || _ref4 === void 0 ? void 0 : _ref4.e;
+(_ref5 = (_o5_b3 = o5["b"]) === null || _o5_b3 === void 0 ? void 0 : _o5_b3.call(o5)["c"].d) === null || _ref5 === void 0 ? void 0 : _ref5["e"];
+(_o6 = o6()) === null || _o6 === void 0 ? void 0 : _o6["x"];
 // GH#36031
 o2 === null || o2 === void 0 ? void 0 : o2["b"].c;
 o2 === null || o2 === void 0 ? void 0 : o2["b"]["c"];
diff --git a/crates/swc/tests/tsc-references/elementAccessChain.2.1.normal.js b/crates/swc/tests/tsc-references/elementAccessChain.2.1.normal.js
index d16a83da68a2..3492073aa987 100644
--- a/crates/swc/tests/tsc-references/elementAccessChain.2.1.normal.js
+++ b/crates/swc/tests/tsc-references/elementAccessChain.2.1.normal.js
@@ -1,7 +1,7 @@
 //// [elementAccessChain.2.ts]
-var ref, ref1;
+var _o3_b, _o3_b1;
 o1 === null || o1 === void 0 ? void 0 : o1["b"];
 o2 === null || o2 === void 0 ? void 0 : o2["b"].c;
 o2 === null || o2 === void 0 ? void 0 : o2.b["c"];
-(ref = o3["b"]) === null || ref === void 0 ? void 0 : ref.c;
-(ref1 = o3.b) === null || ref1 === void 0 ? void 0 : ref1["c"];
+(_o3_b = o3["b"]) === null || _o3_b === void 0 ? void 0 : _o3_b.c;
+(_o3_b1 = o3.b) === null || _o3_b1 === void 0 ? void 0 : _o3_b1["c"];
diff --git a/crates/swc/tests/tsc-references/elementAccessChain.2.2.minified.js b/crates/swc/tests/tsc-references/elementAccessChain.2.2.minified.js
index b1b99f8fd709..b2e17050ccd2 100644
--- a/crates/swc/tests/tsc-references/elementAccessChain.2.2.minified.js
+++ b/crates/swc/tests/tsc-references/elementAccessChain.2.2.minified.js
@@ -1,3 +1,3 @@
 //// [elementAccessChain.2.ts]
-var ref, ref1;
-null == o1 || o1.b, null == o2 || o2.b.c, null == o2 || o2.b.c, null === (ref = o3.b) || void 0 === ref || ref.c, null === (ref1 = o3.b) || void 0 === ref1 || ref1.c;
+var _o3_b, _o3_b1;
+null == o1 || o1.b, null == o2 || o2.b.c, null == o2 || o2.b.c, null === (_o3_b = o3.b) || void 0 === _o3_b || _o3_b.c, null === (_o3_b1 = o3.b) || void 0 === _o3_b1 || _o3_b1.c;
diff --git a/crates/swc/tests/tsc-references/elementAccessChain.2.minified.js b/crates/swc/tests/tsc-references/elementAccessChain.2.minified.js
index 08a3d3369cf9..e2feac34ba7f 100644
--- a/crates/swc/tests/tsc-references/elementAccessChain.2.minified.js
+++ b/crates/swc/tests/tsc-references/elementAccessChain.2.minified.js
@@ -1,3 +1,3 @@
 //// [elementAccessChain.ts]
-var ref, ref1, ref2, ref3, ref4, ref5, ref6, ref7, ref8, ref9, ref10, ref11, ref12, ref13, ref14;
-null == o1 || o1.b, null == o2 || o2.b.c, null == o2 || o2.b.c, null === (ref = o3.b) || void 0 === ref || ref.c, null === (ref1 = o3.b) || void 0 === ref1 || ref1.c, null === (ref3 = null === (ref2 = o4.b) || void 0 === ref2 ? void 0 : ref2.c.d) || void 0 === ref3 || ref3.e, null === (ref5 = null === (ref4 = o4.b) || void 0 === ref4 ? void 0 : ref4.c.d) || void 0 === ref5 || ref5.e, null === (ref7 = null === (ref6 = o5.b) || void 0 === ref6 ? void 0 : ref6.call(o5).c.d) || void 0 === ref7 || ref7.e, null === (ref9 = null === (ref8 = o5.b) || void 0 === ref8 ? void 0 : ref8.call(o5).c.d) || void 0 === ref9 || ref9.e, null === (ref11 = null === (ref10 = o5.b) || void 0 === ref10 ? void 0 : ref10.call(o5).c.d) || void 0 === ref11 || ref11.e, null === (ref13 = null === (ref12 = o5.b) || void 0 === ref12 ? void 0 : ref12.call(o5).c.d) || void 0 === ref13 || ref13.e, null === (ref14 = o6()) || void 0 === ref14 || ref14.x, null == o2 || o2.b.c, null == o2 || o2.b.c, null == o2 || o2.b.c, null == o2 || o2.b.c;
+var _o3_b, _o3_b1, _o4_b, _ref, _o4_b1, _ref1, _o5_b, _ref2, _o5_b1, _ref3, _o5_b2, _ref4, _o5_b3, _ref5, _o6;
+null == o1 || o1.b, null == o2 || o2.b.c, null == o2 || o2.b.c, null === (_o3_b = o3.b) || void 0 === _o3_b || _o3_b.c, null === (_o3_b1 = o3.b) || void 0 === _o3_b1 || _o3_b1.c, null === (_ref = null === (_o4_b = o4.b) || void 0 === _o4_b ? void 0 : _o4_b.c.d) || void 0 === _ref || _ref.e, null === (_ref1 = null === (_o4_b1 = o4.b) || void 0 === _o4_b1 ? void 0 : _o4_b1.c.d) || void 0 === _ref1 || _ref1.e, null === (_ref2 = null === (_o5_b = o5.b) || void 0 === _o5_b ? void 0 : _o5_b.call(o5).c.d) || void 0 === _ref2 || _ref2.e, null === (_ref3 = null === (_o5_b1 = o5.b) || void 0 === _o5_b1 ? void 0 : _o5_b1.call(o5).c.d) || void 0 === _ref3 || _ref3.e, null === (_ref4 = null === (_o5_b2 = o5.b) || void 0 === _o5_b2 ? void 0 : _o5_b2.call(o5).c.d) || void 0 === _ref4 || _ref4.e, null === (_ref5 = null === (_o5_b3 = o5.b) || void 0 === _o5_b3 ? void 0 : _o5_b3.call(o5).c.d) || void 0 === _ref5 || _ref5.e, null === (_o6 = o6()) || void 0 === _o6 || _o6.x, null == o2 || o2.b.c, null == o2 || o2.b.c, null == o2 || o2.b.c, null == o2 || o2.b.c;
diff --git a/crates/swc/tests/tsc-references/emitArrowFunctionWhenUsingArguments18.1.normal.js b/crates/swc/tests/tsc-references/emitArrowFunctionWhenUsingArguments18.1.normal.js
index c8164384b36f..23c5f4c8dcf5 100644
--- a/crates/swc/tests/tsc-references/emitArrowFunctionWhenUsingArguments18.1.normal.js
+++ b/crates/swc/tests/tsc-references/emitArrowFunctionWhenUsingArguments18.1.normal.js
@@ -1,9 +1,9 @@
 //// [emitArrowFunctionWhenUsingArguments18.ts]
 function f() {
     var _arguments = arguments;
-    var ref = {
+    var _ref = {
         arguments: arguments
-    }, args = ref.arguments;
+    }, args = _ref.arguments;
     if (Math.random()) {
         return function() {
             return _arguments;
diff --git a/crates/swc/tests/tsc-references/emitClassDeclarationWithPropertyAccessInHeritageClause1.1.normal.js b/crates/swc/tests/tsc-references/emitClassDeclarationWithPropertyAccessInHeritageClause1.1.normal.js
index e98487e2fb80..275cc6eb1198 100644
--- a/crates/swc/tests/tsc-references/emitClassDeclarationWithPropertyAccessInHeritageClause1.1.normal.js
+++ b/crates/swc/tests/tsc-references/emitClassDeclarationWithPropertyAccessInHeritageClause1.1.normal.js
@@ -11,9 +11,9 @@ function foo() {
         B: B
     };
 }
-var C = /*#__PURE__*/ function(_B) {
+var C = /*#__PURE__*/ function(_foo_B) {
     "use strict";
-    _inherits(C, _B);
+    _inherits(C, _foo_B);
     var _super = _create_super(C);
     function C() {
         _class_call_check(this, C);
diff --git a/crates/swc/tests/tsc-references/emptyArrayBindingPatternParameter04.1.normal.js b/crates/swc/tests/tsc-references/emptyArrayBindingPatternParameter04.1.normal.js
index f03a2818718b..b21224681221 100644
--- a/crates/swc/tests/tsc-references/emptyArrayBindingPatternParameter04.1.normal.js
+++ b/crates/swc/tests/tsc-references/emptyArrayBindingPatternParameter04.1.normal.js
@@ -1,7 +1,7 @@
 //// [emptyArrayBindingPatternParameter04.ts]
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 function f() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
         1,
         2,
         3,
diff --git a/crates/swc/tests/tsc-references/emptyAssignmentPatterns01_ES5.1.normal.js b/crates/swc/tests/tsc-references/emptyAssignmentPatterns01_ES5.1.normal.js
index d1782124d410..bce336e68a14 100644
--- a/crates/swc/tests/tsc-references/emptyAssignmentPatterns01_ES5.1.normal.js
+++ b/crates/swc/tests/tsc-references/emptyAssignmentPatterns01_ES5.1.normal.js
@@ -5,7 +5,7 @@ var ref;
 ref = a, ref;
 var ref1;
 ref1 = _sliced_to_array(a, 0), ref1;
-var ref2 = [
+var _ref = [
     1,
     2
 ];
diff --git a/crates/swc/tests/tsc-references/emptyObjectBindingPatternParameter04.1.normal.js b/crates/swc/tests/tsc-references/emptyObjectBindingPatternParameter04.1.normal.js
index 32818dbb88c4..ed790dcb577f 100644
--- a/crates/swc/tests/tsc-references/emptyObjectBindingPatternParameter04.1.normal.js
+++ b/crates/swc/tests/tsc-references/emptyObjectBindingPatternParameter04.1.normal.js
@@ -1,10 +1,10 @@
 //// [emptyObjectBindingPatternParameter04.ts]
 import _throw from "@swc/helpers/src/_throw.mjs";
 function f() {
-    var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
+    var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {
         a: 1,
         b: "2",
         c: true
-    }, ref = ref !== null ? ref : _throw(new TypeError("Cannot destructure undefined"));
+    }, _ref = _ref !== null ? _ref : _throw(new TypeError("Cannot destructure undefined"));
     var x, y, z;
 }
diff --git a/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5.1.normal.js b/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5.1.normal.js
index 99246b554f9e..2a788b145ba1 100644
--- a/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5.1.normal.js
+++ b/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5.1.normal.js
@@ -3,9 +3,9 @@ import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 import _throw from "@swc/helpers/src/_throw.mjs";
 (function() {
     var f = function f() {
-        var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : a, ref = ref !== null ? ref : _throw(new TypeError("Cannot destructure undefined")), ref1 = _sliced_to_array(arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : a, 0), ref2 = arguments.length > 2 && arguments[2] !== void 0 ? arguments[2] : a, tmp = ref2.p, ref3 = tmp === void 0 ? a : tmp, ref3 = ref3 !== null ? ref3 : _throw(new TypeError("Cannot destructure undefined"));
+        var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : a, _ref = _ref !== null ? _ref : _throw(new TypeError("Cannot destructure undefined")), _ref1 = _sliced_to_array(arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : a, 0), _ref2 = arguments.length > 2 && arguments[2] !== void 0 ? arguments[2] : a, tmp = _ref2.p, _ref3 = tmp === void 0 ? a : tmp, _ref3 = _ref3 !== null ? _ref3 : _throw(new TypeError("Cannot destructure undefined"));
         return function() {
-            var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : a, ref = ref !== null ? ref : _throw(new TypeError("Cannot destructure undefined")), ref1 = _sliced_to_array(arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : a, 0), ref2 = arguments.length > 2 && arguments[2] !== void 0 ? arguments[2] : a, tmp = ref2.p, ref3 = tmp === void 0 ? a : tmp, ref3 = ref3 !== null ? ref3 : _throw(new TypeError("Cannot destructure undefined"));
+            var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : a, _ref = _ref !== null ? _ref : _throw(new TypeError("Cannot destructure undefined")), _ref1 = _sliced_to_array(arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : a, 0), _ref2 = arguments.length > 2 && arguments[2] !== void 0 ? arguments[2] : a, tmp = _ref2.p, _ref3 = tmp === void 0 ? a : tmp, _ref3 = _ref3 !== null ? _ref3 : _throw(new TypeError("Cannot destructure undefined"));
             return a;
         };
     };
@@ -19,17 +19,17 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     var a = a !== null ? a : _throw(new TypeError("Cannot destructure undefined")), _a3 = _sliced_to_array(a, 0);
     var a = a !== null ? a : _throw(new TypeError("Cannot destructure undefined")), _a4 = _sliced_to_array(a, 0);
     var a = a !== null ? a : _throw(new TypeError("Cannot destructure undefined")), _a5 = _sliced_to_array(a, 0);
-    var _p1 = a.p1, _p1 = _p1 !== null ? _p1 : _throw(new TypeError("Cannot destructure undefined")), _p2 = _sliced_to_array(a.p2, 0);
-    var _p11 = a.p1, _p11 = _p11 !== null ? _p11 : _throw(new TypeError("Cannot destructure undefined")), _p21 = _sliced_to_array(a.p2, 0);
-    var _p12 = a.p1, _p12 = _p12 !== null ? _p12 : _throw(new TypeError("Cannot destructure undefined")), _p22 = _sliced_to_array(a.p2, 0);
-    for(var ref = {}, ref = ref !== null ? ref : _throw(new TypeError("Cannot destructure undefined")), ref1 = {}, ref1 = ref1 !== null ? ref1 : _throw(new TypeError("Cannot destructure undefined")); false; void 0){}
+    var _a_p1 = a.p1, _a_p1 = _a_p1 !== null ? _a_p1 : _throw(new TypeError("Cannot destructure undefined")), _a_p2 = _sliced_to_array(a.p2, 0);
+    var _a_p11 = a.p1, _a_p11 = _a_p11 !== null ? _a_p11 : _throw(new TypeError("Cannot destructure undefined")), _a_p21 = _sliced_to_array(a.p2, 0);
+    var _a_p12 = a.p1, _a_p12 = _a_p12 !== null ? _a_p12 : _throw(new TypeError("Cannot destructure undefined")), _a_p22 = _sliced_to_array(a.p2, 0);
+    for(var _ref = {}, _ref = _ref !== null ? _ref : _throw(new TypeError("Cannot destructure undefined")), _ref1 = {}, _ref1 = _ref1 !== null ? _ref1 : _throw(new TypeError("Cannot destructure undefined")); false; void 0){}
 })();
 (function() {
     var ns = [];
     var _iteratorNormalCompletion = true, _didIteratorError = false, _iteratorError = undefined;
     try {
         for(var _iterator = ns[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true){
-            var _value = _step.value, _value = _value !== null ? _value : _throw(new TypeError("Cannot destructure undefined"));
+            var _step_value = _step.value, _step_value = _step_value !== null ? _step_value : _throw(new TypeError("Cannot destructure undefined"));
         }
     } catch (err) {
         _didIteratorError = true;
@@ -48,7 +48,7 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     var _iteratorNormalCompletion1 = true, _didIteratorError1 = false, _iteratorError1 = undefined;
     try {
         for(var _iterator1 = ns[Symbol.iterator](), _step1; !(_iteratorNormalCompletion1 = (_step1 = _iterator1.next()).done); _iteratorNormalCompletion1 = true){
-            var _value1 = _step1.value, _value1 = _value1 !== null ? _value1 : _throw(new TypeError("Cannot destructure undefined"));
+            var _step_value1 = _step1.value, _step_value1 = _step_value1 !== null ? _step_value1 : _throw(new TypeError("Cannot destructure undefined"));
         }
     } catch (err) {
         _didIteratorError1 = true;
@@ -67,7 +67,7 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     var _iteratorNormalCompletion2 = true, _didIteratorError2 = false, _iteratorError2 = undefined;
     try {
         for(var _iterator2 = ns[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true){
-            var _value2 = _step2.value, _value2 = _value2 !== null ? _value2 : _throw(new TypeError("Cannot destructure undefined"));
+            var _step_value2 = _step2.value, _step_value2 = _step_value2 !== null ? _step_value2 : _throw(new TypeError("Cannot destructure undefined"));
         }
     } catch (err) {
         _didIteratorError2 = true;
@@ -86,7 +86,7 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     var _iteratorNormalCompletion3 = true, _didIteratorError3 = false, _iteratorError3 = undefined;
     try {
         for(var _iterator3 = ns[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true){
-            var _value3 = _sliced_to_array(_step3.value, 0);
+            var _step_value3 = _sliced_to_array(_step3.value, 0);
         }
     } catch (err) {
         _didIteratorError3 = true;
@@ -105,7 +105,7 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     var _iteratorNormalCompletion4 = true, _didIteratorError4 = false, _iteratorError4 = undefined;
     try {
         for(var _iterator4 = ns[Symbol.iterator](), _step4; !(_iteratorNormalCompletion4 = (_step4 = _iterator4.next()).done); _iteratorNormalCompletion4 = true){
-            var _value4 = _sliced_to_array(_step4.value, 0);
+            var _step_value4 = _sliced_to_array(_step4.value, 0);
         }
     } catch (err) {
         _didIteratorError4 = true;
@@ -124,7 +124,7 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     var _iteratorNormalCompletion5 = true, _didIteratorError5 = false, _iteratorError5 = undefined;
     try {
         for(var _iterator5 = ns[Symbol.iterator](), _step5; !(_iteratorNormalCompletion5 = (_step5 = _iterator5.next()).done); _iteratorNormalCompletion5 = true){
-            var _value5 = _sliced_to_array(_step5.value, 0);
+            var _step_value5 = _sliced_to_array(_step5.value, 0);
         }
     } catch (err) {
         _didIteratorError5 = true;
diff --git a/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5.2.minified.js b/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5.2.minified.js
index 11f70661b625..d93d48f581f7 100644
--- a/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5.2.minified.js
+++ b/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5.2.minified.js
@@ -10,17 +10,17 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     _sliced_to_array(a, 0);
     var a = null !== a ? a : _throw(new TypeError("Cannot destructure undefined"));
     _sliced_to_array(a, 0);
-    var _p1 = a.p1, _p1 = null !== _p1 ? _p1 : _throw(new TypeError("Cannot destructure undefined"));
+    var _a_p1 = a.p1, _a_p1 = null !== _a_p1 ? _a_p1 : _throw(new TypeError("Cannot destructure undefined"));
     _sliced_to_array(a.p2, 0);
-    var _p11 = a.p1, _p11 = null !== _p11 ? _p11 : _throw(new TypeError("Cannot destructure undefined"));
+    var _a_p11 = a.p1, _a_p11 = null !== _a_p11 ? _a_p11 : _throw(new TypeError("Cannot destructure undefined"));
     _sliced_to_array(a.p2, 0);
-    var _p12 = a.p1, _p12 = null !== _p12 ? _p12 : _throw(new TypeError("Cannot destructure undefined"));
+    var _a_p12 = a.p1, _a_p12 = null !== _a_p12 ? _a_p12 : _throw(new TypeError("Cannot destructure undefined"));
     _sliced_to_array(a.p2, 0);
-    var ref = {}, ref = null !== ref ? ref : _throw(new TypeError("Cannot destructure undefined")), ref1 = {}, ref1 = null !== ref1 ? ref1 : _throw(new TypeError("Cannot destructure undefined"));
+    var _ref = {}, _ref = null !== _ref ? _ref : _throw(new TypeError("Cannot destructure undefined")), _ref1 = {}, _ref1 = null !== _ref1 ? _ref1 : _throw(new TypeError("Cannot destructure undefined"));
 }(), function() {
     var ns = [], _iteratorNormalCompletion = !0, _didIteratorError = !1, _iteratorError = void 0;
     try {
-        for(var _step, _iterator = ns[Symbol.iterator](); !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = !0)var _value = _step.value, _value = null !== _value ? _value : _throw(new TypeError("Cannot destructure undefined"));
+        for(var _step, _iterator = ns[Symbol.iterator](); !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = !0)var _step_value = _step.value, _step_value = null !== _step_value ? _step_value : _throw(new TypeError("Cannot destructure undefined"));
     } catch (err) {
         _didIteratorError = !0, _iteratorError = err;
     } finally{
@@ -32,7 +32,7 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     }
     var _iteratorNormalCompletion1 = !0, _didIteratorError1 = !1, _iteratorError1 = void 0;
     try {
-        for(var _step1, _iterator1 = ns[Symbol.iterator](); !(_iteratorNormalCompletion1 = (_step1 = _iterator1.next()).done); _iteratorNormalCompletion1 = !0)var _value1 = _step1.value, _value1 = null !== _value1 ? _value1 : _throw(new TypeError("Cannot destructure undefined"));
+        for(var _step1, _iterator1 = ns[Symbol.iterator](); !(_iteratorNormalCompletion1 = (_step1 = _iterator1.next()).done); _iteratorNormalCompletion1 = !0)var _step_value1 = _step1.value, _step_value1 = null !== _step_value1 ? _step_value1 : _throw(new TypeError("Cannot destructure undefined"));
     } catch (err) {
         _didIteratorError1 = !0, _iteratorError1 = err;
     } finally{
@@ -44,7 +44,7 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     }
     var _iteratorNormalCompletion2 = !0, _didIteratorError2 = !1, _iteratorError2 = void 0;
     try {
-        for(var _step2, _iterator2 = ns[Symbol.iterator](); !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = !0)var _value2 = _step2.value, _value2 = null !== _value2 ? _value2 : _throw(new TypeError("Cannot destructure undefined"));
+        for(var _step2, _iterator2 = ns[Symbol.iterator](); !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = !0)var _step_value2 = _step2.value, _step_value2 = null !== _step_value2 ? _step_value2 : _throw(new TypeError("Cannot destructure undefined"));
     } catch (err) {
         _didIteratorError2 = !0, _iteratorError2 = err;
     } finally{
diff --git a/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5iterable.1.normal.js b/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5iterable.1.normal.js
index 9c3e82330374..44d3b55ea482 100644
--- a/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5iterable.1.normal.js
+++ b/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5iterable.1.normal.js
@@ -3,9 +3,9 @@ import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 import _throw from "@swc/helpers/src/_throw.mjs";
 (function() {
     var f = function f() {
-        var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : a, ref = ref !== null ? ref : _throw(new TypeError("Cannot destructure undefined")), ref1 = _sliced_to_array(arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : a, 0), ref2 = arguments.length > 2 && arguments[2] !== void 0 ? arguments[2] : a, tmp = ref2.p, ref3 = tmp === void 0 ? a : tmp, ref3 = ref3 !== null ? ref3 : _throw(new TypeError("Cannot destructure undefined"));
+        var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : a, _ref = _ref !== null ? _ref : _throw(new TypeError("Cannot destructure undefined")), _ref1 = _sliced_to_array(arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : a, 0), _ref2 = arguments.length > 2 && arguments[2] !== void 0 ? arguments[2] : a, tmp = _ref2.p, _ref3 = tmp === void 0 ? a : tmp, _ref3 = _ref3 !== null ? _ref3 : _throw(new TypeError("Cannot destructure undefined"));
         return function() {
-            var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : a, ref = ref !== null ? ref : _throw(new TypeError("Cannot destructure undefined")), ref1 = _sliced_to_array(arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : a, 0), ref2 = arguments.length > 2 && arguments[2] !== void 0 ? arguments[2] : a, tmp = ref2.p, ref3 = tmp === void 0 ? a : tmp, ref3 = ref3 !== null ? ref3 : _throw(new TypeError("Cannot destructure undefined"));
+            var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : a, _ref = _ref !== null ? _ref : _throw(new TypeError("Cannot destructure undefined")), _ref1 = _sliced_to_array(arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : a, 0), _ref2 = arguments.length > 2 && arguments[2] !== void 0 ? arguments[2] : a, tmp = _ref2.p, _ref3 = tmp === void 0 ? a : tmp, _ref3 = _ref3 !== null ? _ref3 : _throw(new TypeError("Cannot destructure undefined"));
             return a;
         };
     };
@@ -19,17 +19,17 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     var a = a !== null ? a : _throw(new TypeError("Cannot destructure undefined")), _a3 = _sliced_to_array(a, 0);
     var a = a !== null ? a : _throw(new TypeError("Cannot destructure undefined")), _a4 = _sliced_to_array(a, 0);
     var a = a !== null ? a : _throw(new TypeError("Cannot destructure undefined")), _a5 = _sliced_to_array(a, 0);
-    var _p1 = a.p1, _p1 = _p1 !== null ? _p1 : _throw(new TypeError("Cannot destructure undefined")), _p2 = _sliced_to_array(a.p2, 0);
-    var _p11 = a.p1, _p11 = _p11 !== null ? _p11 : _throw(new TypeError("Cannot destructure undefined")), _p21 = _sliced_to_array(a.p2, 0);
-    var _p12 = a.p1, _p12 = _p12 !== null ? _p12 : _throw(new TypeError("Cannot destructure undefined")), _p22 = _sliced_to_array(a.p2, 0);
-    for(var ref = {}, ref = ref !== null ? ref : _throw(new TypeError("Cannot destructure undefined")), ref1 = {}, ref1 = ref1 !== null ? ref1 : _throw(new TypeError("Cannot destructure undefined")); false; void 0){}
+    var _a_p1 = a.p1, _a_p1 = _a_p1 !== null ? _a_p1 : _throw(new TypeError("Cannot destructure undefined")), _a_p2 = _sliced_to_array(a.p2, 0);
+    var _a_p11 = a.p1, _a_p11 = _a_p11 !== null ? _a_p11 : _throw(new TypeError("Cannot destructure undefined")), _a_p21 = _sliced_to_array(a.p2, 0);
+    var _a_p12 = a.p1, _a_p12 = _a_p12 !== null ? _a_p12 : _throw(new TypeError("Cannot destructure undefined")), _a_p22 = _sliced_to_array(a.p2, 0);
+    for(var _ref = {}, _ref = _ref !== null ? _ref : _throw(new TypeError("Cannot destructure undefined")), _ref1 = {}, _ref1 = _ref1 !== null ? _ref1 : _throw(new TypeError("Cannot destructure undefined")); false; void 0){}
 })();
 (function() {
     var ns = [];
     var _iteratorNormalCompletion = true, _didIteratorError = false, _iteratorError = undefined;
     try {
         for(var _iterator = ns[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true){
-            var _value = _step.value, _value = _value !== null ? _value : _throw(new TypeError("Cannot destructure undefined"));
+            var _step_value = _step.value, _step_value = _step_value !== null ? _step_value : _throw(new TypeError("Cannot destructure undefined"));
         }
     } catch (err) {
         _didIteratorError = true;
@@ -48,7 +48,7 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     var _iteratorNormalCompletion1 = true, _didIteratorError1 = false, _iteratorError1 = undefined;
     try {
         for(var _iterator1 = ns[Symbol.iterator](), _step1; !(_iteratorNormalCompletion1 = (_step1 = _iterator1.next()).done); _iteratorNormalCompletion1 = true){
-            var _value1 = _step1.value, _value1 = _value1 !== null ? _value1 : _throw(new TypeError("Cannot destructure undefined"));
+            var _step_value1 = _step1.value, _step_value1 = _step_value1 !== null ? _step_value1 : _throw(new TypeError("Cannot destructure undefined"));
         }
     } catch (err) {
         _didIteratorError1 = true;
@@ -67,7 +67,7 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     var _iteratorNormalCompletion2 = true, _didIteratorError2 = false, _iteratorError2 = undefined;
     try {
         for(var _iterator2 = ns[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true){
-            var _value2 = _step2.value, _value2 = _value2 !== null ? _value2 : _throw(new TypeError("Cannot destructure undefined"));
+            var _step_value2 = _step2.value, _step_value2 = _step_value2 !== null ? _step_value2 : _throw(new TypeError("Cannot destructure undefined"));
         }
     } catch (err) {
         _didIteratorError2 = true;
@@ -86,7 +86,7 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     var _iteratorNormalCompletion3 = true, _didIteratorError3 = false, _iteratorError3 = undefined;
     try {
         for(var _iterator3 = ns[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true){
-            var _value3 = _sliced_to_array(_step3.value, 0);
+            var _step_value3 = _sliced_to_array(_step3.value, 0);
         }
     } catch (err) {
         _didIteratorError3 = true;
@@ -105,7 +105,7 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     var _iteratorNormalCompletion4 = true, _didIteratorError4 = false, _iteratorError4 = undefined;
     try {
         for(var _iterator4 = ns[Symbol.iterator](), _step4; !(_iteratorNormalCompletion4 = (_step4 = _iterator4.next()).done); _iteratorNormalCompletion4 = true){
-            var _value4 = _sliced_to_array(_step4.value, 0);
+            var _step_value4 = _sliced_to_array(_step4.value, 0);
         }
     } catch (err) {
         _didIteratorError4 = true;
@@ -124,7 +124,7 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     var _iteratorNormalCompletion5 = true, _didIteratorError5 = false, _iteratorError5 = undefined;
     try {
         for(var _iterator5 = ns[Symbol.iterator](), _step5; !(_iteratorNormalCompletion5 = (_step5 = _iterator5.next()).done); _iteratorNormalCompletion5 = true){
-            var _value5 = _sliced_to_array(_step5.value, 0);
+            var _step_value5 = _sliced_to_array(_step5.value, 0);
         }
     } catch (err) {
         _didIteratorError5 = true;
diff --git a/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5iterable.2.minified.js b/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5iterable.2.minified.js
index a55730729d90..6d9e3dcb8d1d 100644
--- a/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5iterable.2.minified.js
+++ b/crates/swc/tests/tsc-references/emptyVariableDeclarationBindingPatterns01_ES5iterable.2.minified.js
@@ -10,17 +10,17 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     _sliced_to_array(a, 0);
     var a = null !== a ? a : _throw(new TypeError("Cannot destructure undefined"));
     _sliced_to_array(a, 0);
-    var _p1 = a.p1, _p1 = null !== _p1 ? _p1 : _throw(new TypeError("Cannot destructure undefined"));
+    var _a_p1 = a.p1, _a_p1 = null !== _a_p1 ? _a_p1 : _throw(new TypeError("Cannot destructure undefined"));
     _sliced_to_array(a.p2, 0);
-    var _p11 = a.p1, _p11 = null !== _p11 ? _p11 : _throw(new TypeError("Cannot destructure undefined"));
+    var _a_p11 = a.p1, _a_p11 = null !== _a_p11 ? _a_p11 : _throw(new TypeError("Cannot destructure undefined"));
     _sliced_to_array(a.p2, 0);
-    var _p12 = a.p1, _p12 = null !== _p12 ? _p12 : _throw(new TypeError("Cannot destructure undefined"));
+    var _a_p12 = a.p1, _a_p12 = null !== _a_p12 ? _a_p12 : _throw(new TypeError("Cannot destructure undefined"));
     _sliced_to_array(a.p2, 0);
-    var ref = {}, ref = null !== ref ? ref : _throw(new TypeError("Cannot destructure undefined")), ref1 = {}, ref1 = null !== ref1 ? ref1 : _throw(new TypeError("Cannot destructure undefined"));
+    var _ref = {}, _ref = null !== _ref ? _ref : _throw(new TypeError("Cannot destructure undefined")), _ref1 = {}, _ref1 = null !== _ref1 ? _ref1 : _throw(new TypeError("Cannot destructure undefined"));
 }(), function() {
     var ns = [], _iteratorNormalCompletion = !0, _didIteratorError = !1, _iteratorError = void 0;
     try {
-        for(var _step, _iterator = ns[Symbol.iterator](); !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = !0)var _value = _step.value, _value = null !== _value ? _value : _throw(new TypeError("Cannot destructure undefined"));
+        for(var _step, _iterator = ns[Symbol.iterator](); !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = !0)var _step_value = _step.value, _step_value = null !== _step_value ? _step_value : _throw(new TypeError("Cannot destructure undefined"));
     } catch (err) {
         _didIteratorError = !0, _iteratorError = err;
     } finally{
@@ -32,7 +32,7 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     }
     var _iteratorNormalCompletion1 = !0, _didIteratorError1 = !1, _iteratorError1 = void 0;
     try {
-        for(var _step1, _iterator1 = ns[Symbol.iterator](); !(_iteratorNormalCompletion1 = (_step1 = _iterator1.next()).done); _iteratorNormalCompletion1 = !0)var _value1 = _step1.value, _value1 = null !== _value1 ? _value1 : _throw(new TypeError("Cannot destructure undefined"));
+        for(var _step1, _iterator1 = ns[Symbol.iterator](); !(_iteratorNormalCompletion1 = (_step1 = _iterator1.next()).done); _iteratorNormalCompletion1 = !0)var _step_value1 = _step1.value, _step_value1 = null !== _step_value1 ? _step_value1 : _throw(new TypeError("Cannot destructure undefined"));
     } catch (err) {
         _didIteratorError1 = !0, _iteratorError1 = err;
     } finally{
@@ -44,7 +44,7 @@ import _throw from "@swc/helpers/src/_throw.mjs";
     }
     var _iteratorNormalCompletion2 = !0, _didIteratorError2 = !1, _iteratorError2 = void 0;
     try {
-        for(var _step2, _iterator2 = ns[Symbol.iterator](); !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = !0)var _value2 = _step2.value, _value2 = null !== _value2 ? _value2 : _throw(new TypeError("Cannot destructure undefined"));
+        for(var _step2, _iterator2 = ns[Symbol.iterator](); !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = !0)var _step_value2 = _step2.value, _step_value2 = null !== _step_value2 ? _step_value2 : _throw(new TypeError("Cannot destructure undefined"));
     } catch (err) {
         _didIteratorError2 = !0, _iteratorError2 = err;
     } finally{
diff --git a/crates/swc/tests/tsc-references/exhaustiveSwitchStatements1.1.normal.js b/crates/swc/tests/tsc-references/exhaustiveSwitchStatements1.1.normal.js
index d1bd3773f55a..0411c3422b03 100644
--- a/crates/swc/tests/tsc-references/exhaustiveSwitchStatements1.1.normal.js
+++ b/crates/swc/tests/tsc-references/exhaustiveSwitchStatements1.1.normal.js
@@ -199,8 +199,8 @@ Animal;
     Animal[Animal["CAT"] = 1] = "CAT";
 })(Animal || (Animal = {}));
 function expression() {
-    var ref;
-    switch((ref = zoo === null || zoo === void 0 ? void 0 : zoo.animal) !== null && ref !== void 0 ? ref : Animal.DOG){
+    var _ref;
+    switch((_ref = zoo === null || zoo === void 0 ? void 0 : zoo.animal) !== null && _ref !== void 0 ? _ref : Animal.DOG){
         case Animal.DOG:
             return Animal.DOG;
         case Animal.CAT:
diff --git a/crates/swc/tests/tsc-references/for-of30.1.normal.js b/crates/swc/tests/tsc-references/for-of30.1.normal.js
index 598295d23364..42cdc54a48dc 100644
--- a/crates/swc/tests/tsc-references/for-of30.1.normal.js
+++ b/crates/swc/tests/tsc-references/for-of30.1.normal.js
@@ -1,5 +1,5 @@
 //// [for-of30.ts]
-let _iterator = Symbol.iterator;
+let _Symbol_iterator = Symbol.iterator;
 class StringIterator {
     next() {
         return {
@@ -7,7 +7,7 @@ class StringIterator {
             value: ""
         };
     }
-    [_iterator]() {
+    [_Symbol_iterator]() {
         return this;
     }
     constructor(){
diff --git a/crates/swc/tests/tsc-references/for-of30.2.minified.js b/crates/swc/tests/tsc-references/for-of30.2.minified.js
index 32f42a66bbcd..05e5ad5c8801 100644
--- a/crates/swc/tests/tsc-references/for-of30.2.minified.js
+++ b/crates/swc/tests/tsc-references/for-of30.2.minified.js
@@ -1,5 +1,5 @@
 //// [for-of30.ts]
-let _iterator = Symbol.iterator;
+let _Symbol_iterator = Symbol.iterator;
 for (var v of new class {
     next() {
         return {
@@ -7,7 +7,7 @@ for (var v of new class {
             value: ""
         };
     }
-    [_iterator]() {
+    [_Symbol_iterator]() {
         return this;
     }
     constructor(){
diff --git a/crates/swc/tests/tsc-references/genericClassExpressionInFunction.1.normal.js b/crates/swc/tests/tsc-references/genericClassExpressionInFunction.1.normal.js
index 5b749ab96e26..99854746a7c6 100644
--- a/crates/swc/tests/tsc-references/genericClassExpressionInFunction.1.normal.js
+++ b/crates/swc/tests/tsc-references/genericClassExpressionInFunction.1.normal.js
@@ -45,9 +45,9 @@ function B3() {
     }(A);
 }
 // extends can call B
-var K = /*#__PURE__*/ function(_superClass) {
+var K = /*#__PURE__*/ function(_B1) {
     "use strict";
-    _inherits(K, _superClass);
+    _inherits(K, _B1);
     var _super = _create_super(K);
     function K() {
         _class_call_check(this, K);
diff --git a/crates/swc/tests/tsc-references/genericClassExpressionInFunction.2.minified.js b/crates/swc/tests/tsc-references/genericClassExpressionInFunction.2.minified.js
index 888d246505a8..29e873e29978 100644
--- a/crates/swc/tests/tsc-references/genericClassExpressionInFunction.2.minified.js
+++ b/crates/swc/tests/tsc-references/genericClassExpressionInFunction.2.minified.js
@@ -5,9 +5,9 @@ import _create_super from "@swc/helpers/src/_create_super.mjs";
 var A = function A() {
     "use strict";
     _class_call_check(this, A);
-}, K = function(_superClass) {
+}, K = function(_B1) {
     "use strict";
-    _inherits(K, _superClass);
+    _inherits(K, _B1);
     var _super = _create_super(K);
     function K() {
         return _class_call_check(this, K), _super.apply(this, arguments);
diff --git a/crates/swc/tests/tsc-references/inferFromBindingPattern.1.normal.js b/crates/swc/tests/tsc-references/inferFromBindingPattern.1.normal.js
index a255523b8807..816c7300dfcc 100644
--- a/crates/swc/tests/tsc-references/inferFromBindingPattern.1.normal.js
+++ b/crates/swc/tests/tsc-references/inferFromBindingPattern.1.normal.js
@@ -1,18 +1,18 @@
 //// [inferFromBindingPattern.ts]
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 var x1 = f1(); // string
-var ref = _sliced_to_array(f2(), 1), x2 = ref[0]; // string
-var ref1 = f3(), x3 = ref1.x; // string
+var _f2 = _sliced_to_array(f2(), 1), x2 = _f2[0]; // string
+var _f3 = f3(), x3 = _f3.x; // string
 // Repro from #30379
 function foo() {
     return [
         42
     ];
 }
-var ref2 = _sliced_to_array(foo(), 1), x = ref2[0]; // [number]
-var ref3 = _sliced_to_array(selectJohn(), 1), person = ref3[0];
-var ref4 = _sliced_to_array(selectJohn(), 2), any = ref4[0], whatever = ref4[1];
+var _foo = _sliced_to_array(foo(), 1), x = _foo[0]; // [number]
+var _selectJohn = _sliced_to_array(selectJohn(), 1), person = _selectJohn[0];
+var _selectJohn1 = _sliced_to_array(selectJohn(), 2), any = _selectJohn1[0], whatever = _selectJohn1[1];
 var john = selectJohn();
 var _john = _sliced_to_array(john, 2), personAgain = _john[0], nufinspecial = _john[1];
 var isStringTuple = makeTuple(stringy()); // [string]
-var ref5 = _sliced_to_array(makeTuple(stringy()), 1), isAny = ref5[0]; // [string]
+var _makeTuple = _sliced_to_array(makeTuple(stringy()), 1), isAny = _makeTuple[0]; // [string]
diff --git a/crates/swc/tests/tsc-references/inferFromBindingPattern.2.minified.js b/crates/swc/tests/tsc-references/inferFromBindingPattern.2.minified.js
index df074a212511..d4c16e1733d6 100644
--- a/crates/swc/tests/tsc-references/inferFromBindingPattern.2.minified.js
+++ b/crates/swc/tests/tsc-references/inferFromBindingPattern.2.minified.js
@@ -3,7 +3,7 @@ import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 f1(), _sliced_to_array(f2(), 1)[0], f3().x, _sliced_to_array([
     42
 ], 1)[0], _sliced_to_array(selectJohn(), 1)[0];
-var ref = _sliced_to_array(selectJohn(), 2);
-ref[0], ref[1];
+var _selectJohn = _sliced_to_array(selectJohn(), 2);
+_selectJohn[0], _selectJohn[1];
 var _john = _sliced_to_array(selectJohn(), 2);
 _john[0], _john[1], makeTuple(stringy()), _sliced_to_array(makeTuple(stringy()), 1)[0];
diff --git a/crates/swc/tests/tsc-references/instanceMemberWithComputedPropertyName.1.normal.js b/crates/swc/tests/tsc-references/instanceMemberWithComputedPropertyName.1.normal.js
index 2a5873531711..52005ae6fba5 100644
--- a/crates/swc/tests/tsc-references/instanceMemberWithComputedPropertyName.1.normal.js
+++ b/crates/swc/tests/tsc-references/instanceMemberWithComputedPropertyName.1.normal.js
@@ -7,8 +7,8 @@ var _x = x;
 var C = function C() {
     _class_call_check(this, C);
     this[_x] = true;
-    var ref = {
+    var _ref = {
         a: 1,
         b: 2
-    }, a = ref.a, b = ref.b;
+    }, a = _ref.a, b = _ref.b;
 };
diff --git a/crates/swc/tests/tsc-references/interfaceExtendsObjectIntersection.1.normal.js b/crates/swc/tests/tsc-references/interfaceExtendsObjectIntersection.1.normal.js
index 8e604068ae54..0685a0838ba5 100644
--- a/crates/swc/tests/tsc-references/interfaceExtendsObjectIntersection.1.normal.js
+++ b/crates/swc/tests/tsc-references/interfaceExtendsObjectIntersection.1.normal.js
@@ -2,9 +2,9 @@
 import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
-var C1 = /*#__PURE__*/ function(_superClass) {
+var C1 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C1, _superClass);
+    _inherits(C1, _Constructor);
     var _super = _create_super(C1);
     function C1() {
         _class_call_check(this, C1);
@@ -12,9 +12,9 @@ var C1 = /*#__PURE__*/ function(_superClass) {
     }
     return C1;
 }(Constructor());
-var C2 = /*#__PURE__*/ function(_superClass) {
+var C2 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C2, _superClass);
+    _inherits(C2, _Constructor);
     var _super = _create_super(C2);
     function C2() {
         _class_call_check(this, C2);
@@ -22,9 +22,9 @@ var C2 = /*#__PURE__*/ function(_superClass) {
     }
     return C2;
 }(Constructor());
-var C3 = /*#__PURE__*/ function(_superClass) {
+var C3 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C3, _superClass);
+    _inherits(C3, _Constructor);
     var _super = _create_super(C3);
     function C3() {
         _class_call_check(this, C3);
@@ -32,9 +32,9 @@ var C3 = /*#__PURE__*/ function(_superClass) {
     }
     return C3;
 }(Constructor());
-var C4 = /*#__PURE__*/ function(_superClass) {
+var C4 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C4, _superClass);
+    _inherits(C4, _Constructor);
     var _super = _create_super(C4);
     function C4() {
         _class_call_check(this, C4);
@@ -42,9 +42,9 @@ var C4 = /*#__PURE__*/ function(_superClass) {
     }
     return C4;
 }(Constructor());
-var C5 = /*#__PURE__*/ function(_superClass) {
+var C5 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C5, _superClass);
+    _inherits(C5, _Constructor);
     var _super = _create_super(C5);
     function C5() {
         _class_call_check(this, C5);
@@ -52,9 +52,9 @@ var C5 = /*#__PURE__*/ function(_superClass) {
     }
     return C5;
 }(Constructor());
-var C6 = /*#__PURE__*/ function(_superClass) {
+var C6 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C6, _superClass);
+    _inherits(C6, _Constructor);
     var _super = _create_super(C6);
     function C6() {
         _class_call_check(this, C6);
@@ -62,9 +62,9 @@ var C6 = /*#__PURE__*/ function(_superClass) {
     }
     return C6;
 }(Constructor());
-var C7 = /*#__PURE__*/ function(_superClass) {
+var C7 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C7, _superClass);
+    _inherits(C7, _Constructor);
     var _super = _create_super(C7);
     function C7() {
         _class_call_check(this, C7);
@@ -78,9 +78,9 @@ var EX;
     EX[EX["B"] = 1] = "B";
     EX[EX["C"] = 2] = "C";
 })(EX || (EX = {}));
-var C20 = /*#__PURE__*/ function(_superClass) {
+var C20 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C20, _superClass);
+    _inherits(C20, _Constructor);
     var _super = _create_super(C20);
     function C20() {
         _class_call_check(this, C20);
@@ -88,9 +88,9 @@ var C20 = /*#__PURE__*/ function(_superClass) {
     }
     return C20;
 }(Constructor());
-var C21 = /*#__PURE__*/ function(_superClass) {
+var C21 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C21, _superClass);
+    _inherits(C21, _Constructor);
     var _super = _create_super(C21);
     function C21() {
         _class_call_check(this, C21);
@@ -98,9 +98,9 @@ var C21 = /*#__PURE__*/ function(_superClass) {
     }
     return C21;
 }(Constructor());
-var C22 = /*#__PURE__*/ function(_superClass) {
+var C22 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C22, _superClass);
+    _inherits(C22, _Constructor);
     var _super = _create_super(C22);
     function C22() {
         _class_call_check(this, C22);
@@ -108,9 +108,9 @@ var C22 = /*#__PURE__*/ function(_superClass) {
     }
     return C22;
 }(Constructor());
-var C23 = /*#__PURE__*/ function(_superClass) {
+var C23 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C23, _superClass);
+    _inherits(C23, _Constructor);
     var _super = _create_super(C23);
     function C23() {
         _class_call_check(this, C23);
diff --git a/crates/swc/tests/tsc-references/interfaceExtendsObjectIntersectionErrors.1.normal.js b/crates/swc/tests/tsc-references/interfaceExtendsObjectIntersectionErrors.1.normal.js
index 4dcb86e3c084..7faf84967e8b 100644
--- a/crates/swc/tests/tsc-references/interfaceExtendsObjectIntersectionErrors.1.normal.js
+++ b/crates/swc/tests/tsc-references/interfaceExtendsObjectIntersectionErrors.1.normal.js
@@ -2,9 +2,9 @@
 import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
-var C1 = /*#__PURE__*/ function(_superClass) {
+var C1 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C1, _superClass);
+    _inherits(C1, _Constructor);
     var _super = _create_super(C1);
     function C1() {
         _class_call_check(this, C1);
@@ -12,9 +12,9 @@ var C1 = /*#__PURE__*/ function(_superClass) {
     }
     return C1;
 }(Constructor());
-var C2 = /*#__PURE__*/ function(_superClass) {
+var C2 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C2, _superClass);
+    _inherits(C2, _Constructor);
     var _super = _create_super(C2);
     function C2() {
         _class_call_check(this, C2);
@@ -22,9 +22,9 @@ var C2 = /*#__PURE__*/ function(_superClass) {
     }
     return C2;
 }(Constructor());
-var C3 = /*#__PURE__*/ function(_superClass) {
+var C3 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C3, _superClass);
+    _inherits(C3, _Constructor);
     var _super = _create_super(C3);
     function C3() {
         _class_call_check(this, C3);
@@ -32,9 +32,9 @@ var C3 = /*#__PURE__*/ function(_superClass) {
     }
     return C3;
 }(Constructor());
-var C4 = /*#__PURE__*/ function(_superClass) {
+var C4 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C4, _superClass);
+    _inherits(C4, _Constructor);
     var _super = _create_super(C4);
     function C4() {
         _class_call_check(this, C4);
@@ -42,9 +42,9 @@ var C4 = /*#__PURE__*/ function(_superClass) {
     }
     return C4;
 }(Constructor());
-var C5 = /*#__PURE__*/ function(_superClass) {
+var C5 = /*#__PURE__*/ function(_Constructor) {
     "use strict";
-    _inherits(C5, _superClass);
+    _inherits(C5, _Constructor);
     var _super = _create_super(C5);
     function C5() {
         _class_call_check(this, C5);
diff --git a/crates/swc/tests/tsc-references/jsDeclarationsReexportedCjsAlias.1.normal.js b/crates/swc/tests/tsc-references/jsDeclarationsReexportedCjsAlias.1.normal.js
index 0bcfbb70de8d..802ff795d7e1 100644
--- a/crates/swc/tests/tsc-references/jsDeclarationsReexportedCjsAlias.1.normal.js
+++ b/crates/swc/tests/tsc-references/jsDeclarationsReexportedCjsAlias.1.normal.js
@@ -21,7 +21,7 @@ module.exports = {
     SomeClass: SomeClass
 };
 //// [main.js]
-var ref = require("./lib"), SomeClass = ref.SomeClass, Another = ref.SomeClass;
+var _require = require("./lib"), SomeClass = _require.SomeClass, Another = _require.SomeClass;
 module.exports = {
     SomeClass: SomeClass,
     Another: Another
diff --git a/crates/swc/tests/tsc-references/jsDeclarationsReexportedCjsAlias.2.minified.js b/crates/swc/tests/tsc-references/jsDeclarationsReexportedCjsAlias.2.minified.js
index 0c44caa76333..c71ded15b181 100644
--- a/crates/swc/tests/tsc-references/jsDeclarationsReexportedCjsAlias.2.minified.js
+++ b/crates/swc/tests/tsc-references/jsDeclarationsReexportedCjsAlias.2.minified.js
@@ -16,7 +16,7 @@ module.exports = {
     SomeClass: SomeClass
 };
 //// [main.js]
-var ref = require("./lib"), SomeClass = ref.SomeClass, Another = ref.SomeClass;
+var _require = require("./lib"), SomeClass = _require.SomeClass, Another = _require.SomeClass;
 module.exports = {
     SomeClass: SomeClass,
     Another: Another
diff --git a/crates/swc/tests/tsc-references/jsDeclarationsTypeReferences2.1.normal.js b/crates/swc/tests/tsc-references/jsDeclarationsTypeReferences2.1.normal.js
index 89b5c65a3130..b33bf6fc0de5 100644
--- a/crates/swc/tests/tsc-references/jsDeclarationsTypeReferences2.1.normal.js
+++ b/crates/swc/tests/tsc-references/jsDeclarationsTypeReferences2.1.normal.js
@@ -4,7 +4,7 @@ export var o = {
     m: 1
 };
 //// [index.js]
-var _o = require("./something").o, a = _o.a, m = _o.m;
+var _require_o = require("./something").o, a = _require_o.a, m = _require_o.m;
 var thing = a + m;
 module.exports = {
     thing: thing
diff --git a/crates/swc/tests/tsc-references/jsDeclarationsTypeReferences2.2.minified.js b/crates/swc/tests/tsc-references/jsDeclarationsTypeReferences2.2.minified.js
index 50759263cc0d..7874015f2e40 100644
--- a/crates/swc/tests/tsc-references/jsDeclarationsTypeReferences2.2.minified.js
+++ b/crates/swc/tests/tsc-references/jsDeclarationsTypeReferences2.2.minified.js
@@ -4,7 +4,7 @@ export var o = {
     m: 1
 };
 //// [index.js]
-var _o = require("./something").o, a = _o.a, m = _o.m;
+var _require_o = require("./something").o, a = _require_o.a, m = _require_o.m;
 module.exports = {
     thing: a + m
 };
diff --git a/crates/swc/tests/tsc-references/jsDeclarationsTypedefPropertyAndExportAssignment.1.normal.js b/crates/swc/tests/tsc-references/jsDeclarationsTypedefPropertyAndExportAssignment.1.normal.js
index 60aabcbc075a..9ead284d60d9 100644
--- a/crates/swc/tests/tsc-references/jsDeclarationsTypedefPropertyAndExportAssignment.1.normal.js
+++ b/crates/swc/tests/tsc-references/jsDeclarationsTypedefPropertyAndExportAssignment.1.normal.js
@@ -23,7 +23,7 @@ module.exports = {
 };
 //// [index.js]
 import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
-var ref = require("./module.js"), taskGroups = ref.taskGroups, taskNameToGroup = ref.taskNameToGroup;
+var _require = require("./module.js"), taskGroups = _require.taskGroups, taskNameToGroup = _require.taskNameToGroup;
 /** @typedef {import('./module.js').TaskGroup} TaskGroup */ /**
  * @typedef TaskNode
  * @prop {TaskNode[]} children
diff --git a/crates/swc/tests/tsc-references/jsDeclarationsTypedefPropertyAndExportAssignment.2.minified.js b/crates/swc/tests/tsc-references/jsDeclarationsTypedefPropertyAndExportAssignment.2.minified.js
index 4a3718820dc0..118ce6d5bdb7 100644
--- a/crates/swc/tests/tsc-references/jsDeclarationsTypedefPropertyAndExportAssignment.2.minified.js
+++ b/crates/swc/tests/tsc-references/jsDeclarationsTypedefPropertyAndExportAssignment.2.minified.js
@@ -14,8 +14,8 @@ module.exports = {
 };
 //// [index.js]
 import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
-var ref = require("./module.js");
-ref.taskGroups, ref.taskNameToGroup, module.exports = function MainThreadTasks(x, y) {
+var _require = require("./module.js");
+_require.taskGroups, _require.taskNameToGroup, module.exports = function MainThreadTasks(x, y) {
     "use strict";
     _class_call_check(this, MainThreadTasks);
 };
diff --git a/crates/swc/tests/tsc-references/literalTypes2.1.normal.js b/crates/swc/tests/tsc-references/literalTypes2.1.normal.js
index a0e6ac513feb..caa4f83b65be 100644
--- a/crates/swc/tests/tsc-references/literalTypes2.1.normal.js
+++ b/crates/swc/tests/tsc-references/literalTypes2.1.normal.js
@@ -135,16 +135,16 @@ function f5() {
     ];
 }
 function f6() {
-    var ref = {
+    var _ref = {
         c1: false,
         c2: 1,
         c3: "bar"
-    }, _c1 = ref.c1, c1 = _c1 === void 0 ? true : _c1, _c2 = ref.c2, c2 = _c2 === void 0 ? 0 : _c2, _c3 = ref.c3, c3 = _c3 === void 0 ? "foo" : _c3;
-    var ref1 = {
+    }, _ref_c1 = _ref.c1, c1 = _ref_c1 === void 0 ? true : _ref_c1, _ref_c2 = _ref.c2, c2 = _ref_c2 === void 0 ? 0 : _ref_c2, _ref_c3 = _ref.c3, c3 = _ref_c3 === void 0 ? "foo" : _ref_c3;
+    var _ref1 = {
         x1: false,
         x2: 1,
         x3: "bar"
-    }, _x1 = ref1.x1, x1 = _x1 === void 0 ? true : _x1, _x2 = ref1.x2, x2 = _x2 === void 0 ? 0 : _x2, _x3 = ref1.x3, x3 = _x3 === void 0 ? "foo" : _x3;
+    }, _ref_x1 = _ref1.x1, x1 = _ref_x1 === void 0 ? true : _ref_x1, _ref_x2 = _ref1.x2, x2 = _ref_x2 === void 0 ? 0 : _ref_x2, _ref_x3 = _ref1.x3, x3 = _ref_x3 === void 0 ? "foo" : _ref_x3;
 }
 function f10() {
     return "hello";
diff --git a/crates/swc/tests/tsc-references/literalTypesAndDestructuring.1.normal.js b/crates/swc/tests/tsc-references/literalTypesAndDestructuring.1.normal.js
index 96de6e72f561..7556c849ecf0 100644
--- a/crates/swc/tests/tsc-references/literalTypesAndDestructuring.1.normal.js
+++ b/crates/swc/tests/tsc-references/literalTypesAndDestructuring.1.normal.js
@@ -4,11 +4,11 @@ var tmp = x.a, a2 = tmp === void 0 ? 0 : tmp;
 var tmp1 = x.a, a3 = tmp1 === void 0 ? 2 : tmp1;
 var tmp2 = x.a, a4 = tmp2 === void 0 ? 2 : tmp2;
 var b1 = x.a;
-var _a;
-var b2 = (_a = x.a) !== null && _a !== void 0 ? _a : 0;
-var _a1;
-var b3 = (_a1 = x.a) !== null && _a1 !== void 0 ? _a1 : 2;
-var _a2;
-var b4 = (_a2 = x.a) !== null && _a2 !== void 0 ? _a2 : 2;
-var ref = {}, _bar = ref.bar, bar = _bar === void 0 ? "yo" : _bar;
+var _x_a;
+var b2 = (_x_a = x.a) !== null && _x_a !== void 0 ? _x_a : 0;
+var _x_a1;
+var b3 = (_x_a1 = x.a) !== null && _x_a1 !== void 0 ? _x_a1 : 2;
+var _x_a2;
+var b4 = (_x_a2 = x.a) !== null && _x_a2 !== void 0 ? _x_a2 : 2;
+var _ref = {}, _ref_bar = _ref.bar, bar = _ref_bar === void 0 ? "yo" : _ref_bar;
 bar; // "yo" | "ha"
diff --git a/crates/swc/tests/tsc-references/literalTypesAndTypeAssertions.1.normal.js b/crates/swc/tests/tsc-references/literalTypesAndTypeAssertions.1.normal.js
index b0a6ad04d53d..da1a1749666c 100644
--- a/crates/swc/tests/tsc-references/literalTypesAndTypeAssertions.1.normal.js
+++ b/crates/swc/tests/tsc-references/literalTypesAndTypeAssertions.1.normal.js
@@ -6,15 +6,15 @@ var obj = {
 };
 var x1 = 1;
 var x2 = 1;
-var ref = {
+var _ref = {
     a: "foo"
-}, _a = ref.a, a = _a === void 0 ? "foo" : _a;
-var ref1 = {
+}, _ref_a = _ref.a, a = _ref_a === void 0 ? "foo" : _ref_a;
+var _ref1 = {
     b: "bar"
-}, _b = ref1.b, b = _b === void 0 ? "foo" : _b;
-var ref2 = {
+}, _ref_b = _ref1.b, b = _ref_b === void 0 ? "foo" : _ref_b;
+var _ref2 = {
     c: "bar"
-}, _c = ref2.c, c = _c === void 0 ? "foo" : _c;
-var ref3 = {
+}, _ref_c = _ref2.c, c = _ref_c === void 0 ? "foo" : _ref_c;
+var _ref3 = {
     d: "bar"
-}, _d = ref3.d, d = _d === void 0 ? "foo" : _d;
+}, _ref_d = _ref3.d, d = _ref_d === void 0 ? "foo" : _ref_d;
diff --git a/crates/swc/tests/tsc-references/logicalAssignment10(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/logicalAssignment10(target=es2015).1.normal.js
index 1182f7e3338f..2e870563637f 100644
--- a/crates/swc/tests/tsc-references/logicalAssignment10(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/logicalAssignment10(target=es2015).1.normal.js
@@ -1,5 +1,5 @@
 //// [logicalAssignment10.ts]
-var _obj, _ref, _ref1, _ref2;
+var _obj, _incr, _oobj_obj, _incr1;
 var count = 0;
 var obj = {};
 function incr() {
@@ -8,7 +8,7 @@ function incr() {
 const oobj = {
     obj
 };
-var ref;
-(ref = (_obj = obj)[_ref = incr()]) !== null && ref !== void 0 ? ref : _obj[_ref] = incr();
-var ref1;
-(ref1 = (_ref1 = oobj["obj"])[_ref2 = incr()]) !== null && ref1 !== void 0 ? ref1 : _ref1[_ref2] = incr();
+var _;
+(_ = (_obj = obj)[_incr = incr()]) !== null && _ !== void 0 ? _ : _obj[_incr] = incr();
+var _1;
+(_1 = (_oobj_obj = oobj["obj"])[_incr1 = incr()]) !== null && _1 !== void 0 ? _1 : _oobj_obj[_incr1] = incr();
diff --git a/crates/swc/tests/tsc-references/logicalAssignment10(target=es2015).2.minified.js b/crates/swc/tests/tsc-references/logicalAssignment10(target=es2015).2.minified.js
index cdd066f9148d..9f767357eb20 100644
--- a/crates/swc/tests/tsc-references/logicalAssignment10(target=es2015).2.minified.js
+++ b/crates/swc/tests/tsc-references/logicalAssignment10(target=es2015).2.minified.js
@@ -1,5 +1,5 @@
 //// [logicalAssignment10.ts]
-var _obj, _ref, _ref1, _ref2, ref, ref1, count = 0, obj = {};
-null !== (ref = (_obj = obj)[_ref = ++count]) && void 0 !== ref || (_obj[_ref] = ++count), null !== (ref1 = (_ref1 = ({
+var _obj, _incr, _oobj_obj, _incr1, _, _1, count = 0, obj = {};
+null !== (_ = (_obj = obj)[_incr = ++count]) && void 0 !== _ || (_obj[_incr] = ++count), null !== (_1 = (_oobj_obj = ({
     obj
-}).obj)[_ref2 = ++count]) && void 0 !== ref1 || (_ref1[_ref2] = ++count);
+}).obj)[_incr1 = ++count]) && void 0 !== _1 || (_oobj_obj[_incr1] = ++count);
diff --git a/crates/swc/tests/tsc-references/logicalAssignment10(target=es2020).1.normal.js b/crates/swc/tests/tsc-references/logicalAssignment10(target=es2020).1.normal.js
index d44cbb376cff..375469b42502 100644
--- a/crates/swc/tests/tsc-references/logicalAssignment10(target=es2020).1.normal.js
+++ b/crates/swc/tests/tsc-references/logicalAssignment10(target=es2020).1.normal.js
@@ -1,5 +1,5 @@
 //// [logicalAssignment10.ts]
-var _obj, _ref, _ref1, _ref2;
+var _obj, _incr, _oobj_obj, _incr1;
 var count = 0;
 var obj = {};
 function incr() {
@@ -8,5 +8,5 @@ function incr() {
 const oobj = {
     obj
 };
-(_obj = obj)[_ref = incr()] ?? (_obj[_ref] = incr());
-(_ref1 = oobj["obj"])[_ref2 = incr()] ?? (_ref1[_ref2] = incr());
+(_obj = obj)[_incr = incr()] ?? (_obj[_incr] = incr());
+(_oobj_obj = oobj["obj"])[_incr1 = incr()] ?? (_oobj_obj[_incr1] = incr());
diff --git a/crates/swc/tests/tsc-references/logicalAssignment10(target=es2020).2.minified.js b/crates/swc/tests/tsc-references/logicalAssignment10(target=es2020).2.minified.js
index b6e88407df32..1a0684542b94 100644
--- a/crates/swc/tests/tsc-references/logicalAssignment10(target=es2020).2.minified.js
+++ b/crates/swc/tests/tsc-references/logicalAssignment10(target=es2020).2.minified.js
@@ -1,5 +1,5 @@
 //// [logicalAssignment10.ts]
-var _obj, _ref, _ref1, _ref2, count = 0, obj = {};
-(_obj = obj)[_ref = ++count] ?? (_obj[_ref] = ++count), (_ref1 = ({
+var _obj, _incr, _oobj_obj, _incr1, count = 0, obj = {};
+(_obj = obj)[_incr = ++count] ?? (_obj[_incr] = ++count), (_oobj_obj = ({
     obj
-}).obj)[_ref2 = ++count] ?? (_ref1[_ref2] = ++count);
+}).obj)[_incr1 = ++count] ?? (_oobj_obj[_incr1] = ++count);
diff --git a/crates/swc/tests/tsc-references/logicalAssignment2(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/logicalAssignment2(target=es2015).1.normal.js
index 658daf660030..8ad17e7b84bb 100644
--- a/crates/swc/tests/tsc-references/logicalAssignment2(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/logicalAssignment2(target=es2015).1.normal.js
@@ -1,14 +1,14 @@
 //// [logicalAssignment2.ts]
-var _a, _b, _c, _foo, _ref, _foo1, _ref1, _foo2, _ref2, _ref3, _ref4, _ref5;
+var _a, _b, _c, _a_foo, _baz, _b_foo, _baz1, _c_foo, _baz2, _a_foo_bar, _b_foo_bar, _c_foo_bar;
 (_a = a).baz && (_a.baz = result.baz);
 (_b = b).baz || (_b.baz = result.baz);
-var _baz;
-(_baz = (_c = c).baz) !== null && _baz !== void 0 ? _baz : _c.baz = result.baz;
-(_foo = a.foo)[_ref = "baz"] && (_foo[_ref] = result.foo.baz);
-(_foo1 = b.foo)[_ref1 = "baz"] || (_foo1[_ref1] = result.foo.baz);
-var ref;
-(ref = (_foo2 = c.foo)[_ref2 = "baz"]) !== null && ref !== void 0 ? ref : _foo2[_ref2] = result.foo.baz;
-(_ref3 = a.foo.bar()).baz && (_ref3.baz = result.foo.bar().baz);
-(_ref4 = b.foo.bar()).baz || (_ref4.baz = result.foo.bar().baz);
-var _baz1;
-(_baz1 = (_ref5 = c.foo.bar()).baz) !== null && _baz1 !== void 0 ? _baz1 : _ref5.baz = result.foo.bar().baz;
+var _baz3;
+(_baz3 = (_c = c).baz) !== null && _baz3 !== void 0 ? _baz3 : _c.baz = result.baz;
+(_a_foo = a.foo)[_baz = "baz"] && (_a_foo[_baz] = result.foo.baz);
+(_b_foo = b.foo)[_baz1 = "baz"] || (_b_foo[_baz1] = result.foo.baz);
+var _;
+(_ = (_c_foo = c.foo)[_baz2 = "baz"]) !== null && _ !== void 0 ? _ : _c_foo[_baz2] = result.foo.baz;
+(_a_foo_bar = a.foo.bar()).baz && (_a_foo_bar.baz = result.foo.bar().baz);
+(_b_foo_bar = b.foo.bar()).baz || (_b_foo_bar.baz = result.foo.bar().baz);
+var _baz4;
+(_baz4 = (_c_foo_bar = c.foo.bar()).baz) !== null && _baz4 !== void 0 ? _baz4 : _c_foo_bar.baz = result.foo.bar().baz;
diff --git a/crates/swc/tests/tsc-references/logicalAssignment2(target=es2015).2.minified.js b/crates/swc/tests/tsc-references/logicalAssignment2(target=es2015).2.minified.js
index ce85e9db844c..abbfb1ad92f1 100644
--- a/crates/swc/tests/tsc-references/logicalAssignment2(target=es2015).2.minified.js
+++ b/crates/swc/tests/tsc-references/logicalAssignment2(target=es2015).2.minified.js
@@ -1,3 +1,3 @@
 //// [logicalAssignment2.ts]
-var _a, _b, _c, _foo, _foo1, _foo2, _ref, _ref1, _ref2, _baz, ref, _baz1;
-(_a = a).baz && (_a.baz = result.baz), (_b = b).baz || (_b.baz = result.baz), null !== (_baz = (_c = c).baz) && void 0 !== _baz || (_c.baz = result.baz), (_foo = a.foo).baz && (_foo.baz = result.foo.baz), (_foo1 = b.foo).baz || (_foo1.baz = result.foo.baz), null !== (ref = (_foo2 = c.foo).baz) && void 0 !== ref || (_foo2.baz = result.foo.baz), (_ref = a.foo.bar()).baz && (_ref.baz = result.foo.bar().baz), (_ref1 = b.foo.bar()).baz || (_ref1.baz = result.foo.bar().baz), null !== (_baz1 = (_ref2 = c.foo.bar()).baz) && void 0 !== _baz1 || (_ref2.baz = result.foo.bar().baz);
+var _a, _b, _c, _a_foo, _b_foo, _c_foo, _a_foo_bar, _b_foo_bar, _c_foo_bar, _baz, _, _baz1;
+(_a = a).baz && (_a.baz = result.baz), (_b = b).baz || (_b.baz = result.baz), null !== (_baz = (_c = c).baz) && void 0 !== _baz || (_c.baz = result.baz), (_a_foo = a.foo).baz && (_a_foo.baz = result.foo.baz), (_b_foo = b.foo).baz || (_b_foo.baz = result.foo.baz), null !== (_ = (_c_foo = c.foo).baz) && void 0 !== _ || (_c_foo.baz = result.foo.baz), (_a_foo_bar = a.foo.bar()).baz && (_a_foo_bar.baz = result.foo.bar().baz), (_b_foo_bar = b.foo.bar()).baz || (_b_foo_bar.baz = result.foo.bar().baz), null !== (_baz1 = (_c_foo_bar = c.foo.bar()).baz) && void 0 !== _baz1 || (_c_foo_bar.baz = result.foo.bar().baz);
diff --git a/crates/swc/tests/tsc-references/logicalAssignment2(target=es2020).1.normal.js b/crates/swc/tests/tsc-references/logicalAssignment2(target=es2020).1.normal.js
index 3b35f8ce4ad8..c210f6e2eb7a 100644
--- a/crates/swc/tests/tsc-references/logicalAssignment2(target=es2020).1.normal.js
+++ b/crates/swc/tests/tsc-references/logicalAssignment2(target=es2020).1.normal.js
@@ -1,11 +1,11 @@
 //// [logicalAssignment2.ts]
-var _a, _b, _c, _foo, _ref, _foo1, _ref1, _foo2, _ref2, _ref3, _ref4, _ref5;
+var _a, _b, _c, _a_foo, _baz, _b_foo, _baz1, _c_foo, _baz2, _a_foo_bar, _b_foo_bar, _c_foo_bar;
 (_a = a).baz && (_a.baz = result.baz);
 (_b = b).baz || (_b.baz = result.baz);
 (_c = c).baz ?? (_c.baz = result.baz);
-(_foo = a.foo)[_ref = "baz"] && (_foo[_ref] = result.foo.baz);
-(_foo1 = b.foo)[_ref1 = "baz"] || (_foo1[_ref1] = result.foo.baz);
-(_foo2 = c.foo)[_ref2 = "baz"] ?? (_foo2[_ref2] = result.foo.baz);
-(_ref3 = a.foo.bar()).baz && (_ref3.baz = result.foo.bar().baz);
-(_ref4 = b.foo.bar()).baz || (_ref4.baz = result.foo.bar().baz);
-(_ref5 = c.foo.bar()).baz ?? (_ref5.baz = result.foo.bar().baz);
+(_a_foo = a.foo)[_baz = "baz"] && (_a_foo[_baz] = result.foo.baz);
+(_b_foo = b.foo)[_baz1 = "baz"] || (_b_foo[_baz1] = result.foo.baz);
+(_c_foo = c.foo)[_baz2 = "baz"] ?? (_c_foo[_baz2] = result.foo.baz);
+(_a_foo_bar = a.foo.bar()).baz && (_a_foo_bar.baz = result.foo.bar().baz);
+(_b_foo_bar = b.foo.bar()).baz || (_b_foo_bar.baz = result.foo.bar().baz);
+(_c_foo_bar = c.foo.bar()).baz ?? (_c_foo_bar.baz = result.foo.bar().baz);
diff --git a/crates/swc/tests/tsc-references/logicalAssignment2(target=es2020).2.minified.js b/crates/swc/tests/tsc-references/logicalAssignment2(target=es2020).2.minified.js
index fd196d61420c..dce4d83ffe54 100644
--- a/crates/swc/tests/tsc-references/logicalAssignment2(target=es2020).2.minified.js
+++ b/crates/swc/tests/tsc-references/logicalAssignment2(target=es2020).2.minified.js
@@ -1,3 +1,3 @@
 //// [logicalAssignment2.ts]
-var _a, _b, _c, _foo, _foo1, _foo2, _ref, _ref1, _ref2;
-(_a = a).baz && (_a.baz = result.baz), (_b = b).baz || (_b.baz = result.baz), (_c = c).baz ?? (_c.baz = result.baz), (_foo = a.foo).baz && (_foo.baz = result.foo.baz), (_foo1 = b.foo).baz || (_foo1.baz = result.foo.baz), (_foo2 = c.foo).baz ?? (_foo2.baz = result.foo.baz), (_ref = a.foo.bar()).baz && (_ref.baz = result.foo.bar().baz), (_ref1 = b.foo.bar()).baz || (_ref1.baz = result.foo.bar().baz), (_ref2 = c.foo.bar()).baz ?? (_ref2.baz = result.foo.bar().baz);
+var _a, _b, _c, _a_foo, _b_foo, _c_foo, _a_foo_bar, _b_foo_bar, _c_foo_bar;
+(_a = a).baz && (_a.baz = result.baz), (_b = b).baz || (_b.baz = result.baz), (_c = c).baz ?? (_c.baz = result.baz), (_a_foo = a.foo).baz && (_a_foo.baz = result.foo.baz), (_b_foo = b.foo).baz || (_b_foo.baz = result.foo.baz), (_c_foo = c.foo).baz ?? (_c_foo.baz = result.foo.baz), (_a_foo_bar = a.foo.bar()).baz && (_a_foo_bar.baz = result.foo.bar().baz), (_b_foo_bar = b.foo.bar()).baz || (_b_foo_bar.baz = result.foo.bar().baz), (_c_foo_bar = c.foo.bar()).baz ?? (_c_foo_bar.baz = result.foo.bar().baz);
diff --git a/crates/swc/tests/tsc-references/logicalAssignment8(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/logicalAssignment8(target=es2015).1.normal.js
index 4e1807ef07d6..0a96c8fcb4f2 100644
--- a/crates/swc/tests/tsc-references/logicalAssignment8(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/logicalAssignment8(target=es2015).1.normal.js
@@ -1,13 +1,13 @@
 //// [logicalAssignment8.ts]
 function foo1(results) {
-    var ref;
-    (results || (results = (ref = bar === null || bar === void 0 ? void 0 : bar.value) !== null && ref !== void 0 ? ref : [])).push(100);
+    var _ref;
+    (results || (results = (_ref = bar === null || bar === void 0 ? void 0 : bar.value) !== null && _ref !== void 0 ? _ref : [])).push(100);
 }
 function foo2(results) {
-    var ref;
-    (results !== null && results !== void 0 ? results : results = (ref = bar === null || bar === void 0 ? void 0 : bar.value) !== null && ref !== void 0 ? ref : []).push(100);
+    var _ref;
+    (results !== null && results !== void 0 ? results : results = (_ref = bar === null || bar === void 0 ? void 0 : bar.value) !== null && _ref !== void 0 ? _ref : []).push(100);
 }
 function foo3(results) {
-    var ref;
-    (results && (results = (ref = bar === null || bar === void 0 ? void 0 : bar.value) !== null && ref !== void 0 ? ref : [])).push(100);
+    var _ref;
+    (results && (results = (_ref = bar === null || bar === void 0 ? void 0 : bar.value) !== null && _ref !== void 0 ? _ref : [])).push(100);
 }
diff --git a/crates/swc/tests/tsc-references/missingAndExcessProperties.1.normal.js b/crates/swc/tests/tsc-references/missingAndExcessProperties.1.normal.js
index 8ce71bbbabb0..dd8a1df37a6b 100644
--- a/crates/swc/tests/tsc-references/missingAndExcessProperties.1.normal.js
+++ b/crates/swc/tests/tsc-references/missingAndExcessProperties.1.normal.js
@@ -2,10 +2,10 @@
 // Missing properties
 import _throw from "@swc/helpers/src/_throw.mjs";
 function f1() {
-    var ref = {}, x = ref.x, y = ref.y;
-    var ref1 = {}, _x = ref1.x, x = _x === void 0 ? 1 : _x, y = ref1.y;
-    var ref2 = {}, x = ref2.x, _y = ref2.y, y = _y === void 0 ? 1 : _y;
-    var ref3 = {}, _x1 = ref3.x, x = _x1 === void 0 ? 1 : _x1, _y1 = ref3.y, y = _y1 === void 0 ? 1 : _y1;
+    var _ref = {}, x = _ref.x, y = _ref.y;
+    var _ref1 = {}, _ref_x = _ref1.x, x = _ref_x === void 0 ? 1 : _ref_x, y = _ref1.y;
+    var _ref2 = {}, x = _ref2.x, _ref_y = _ref2.y, y = _ref_y === void 0 ? 1 : _ref_y;
+    var _ref3 = {}, _ref_x1 = _ref3.x, x = _ref_x1 === void 0 ? 1 : _ref_x1, _ref_y1 = _ref3.y, y = _ref_y1 === void 0 ? 1 : _ref_y1;
 }
 // Missing properties
 function f2() {
@@ -21,10 +21,10 @@ function f2() {
 }
 // Excess properties
 function f3() {
-    var ref = {
+    var _ref = {
         x: 0,
         y: 0
-    }, ref = ref !== null ? ref : _throw(new TypeError("Cannot destructure undefined"));
+    }, _ref = _ref !== null ? _ref : _throw(new TypeError("Cannot destructure undefined"));
     var x = {
         x: 0,
         y: 0
@@ -33,10 +33,10 @@ function f3() {
         x: 0,
         y: 0
     }.y;
-    var ref1 = {
+    var _ref1 = {
         x: 0,
         y: 0
-    }, x = ref1.x, y = ref1.y;
+    }, x = _ref1.x, y = _ref1.y;
 }
 // Excess properties
 function f4() {
diff --git a/crates/swc/tests/tsc-references/mixinAccessModifiers.1.normal.js b/crates/swc/tests/tsc-references/mixinAccessModifiers.1.normal.js
index 035b30f8fb53..287e335062d0 100644
--- a/crates/swc/tests/tsc-references/mixinAccessModifiers.1.normal.js
+++ b/crates/swc/tests/tsc-references/mixinAccessModifiers.1.normal.js
@@ -63,9 +63,9 @@ function f6(x) {
     x.p; // Ok, public if any constituent is public
 }
 // Can't derive from type with inaccessible properties
-var C1 = /*#__PURE__*/ function(_superClass) {
+var C1 = /*#__PURE__*/ function(_Mix) {
     "use strict";
-    _inherits(C1, _superClass);
+    _inherits(C1, _Mix);
     var _super = _create_super(C1);
     function C1() {
         _class_call_check(this, C1);
@@ -73,9 +73,9 @@ var C1 = /*#__PURE__*/ function(_superClass) {
     }
     return C1;
 }(Mix(Private, Private2));
-var C2 = /*#__PURE__*/ function(_superClass) {
+var C2 = /*#__PURE__*/ function(_Mix) {
     "use strict";
-    _inherits(C2, _superClass);
+    _inherits(C2, _Mix);
     var _super = _create_super(C2);
     function C2() {
         _class_call_check(this, C2);
@@ -83,9 +83,9 @@ var C2 = /*#__PURE__*/ function(_superClass) {
     }
     return C2;
 }(Mix(Private, Protected));
-var C3 = /*#__PURE__*/ function(_superClass) {
+var C3 = /*#__PURE__*/ function(_Mix) {
     "use strict";
-    _inherits(C3, _superClass);
+    _inherits(C3, _Mix);
     var _super = _create_super(C3);
     function C3() {
         _class_call_check(this, C3);
@@ -93,9 +93,9 @@ var C3 = /*#__PURE__*/ function(_superClass) {
     }
     return C3;
 }(Mix(Private, Public));
-var C4 = /*#__PURE__*/ function(_superClass) {
+var C4 = /*#__PURE__*/ function(_Mix) {
     "use strict";
-    _inherits(C4, _superClass);
+    _inherits(C4, _Mix);
     var _super = _create_super(C4);
     function C4() {
         _class_call_check(this, C4);
@@ -114,9 +114,9 @@ var C4 = /*#__PURE__*/ function(_superClass) {
     };
     return C4;
 }(Mix(Protected, Protected2));
-var C5 = /*#__PURE__*/ function(_superClass) {
+var C5 = /*#__PURE__*/ function(_Mix) {
     "use strict";
-    _inherits(C5, _superClass);
+    _inherits(C5, _Mix);
     var _super = _create_super(C5);
     function C5() {
         _class_call_check(this, C5);
@@ -135,9 +135,9 @@ var C5 = /*#__PURE__*/ function(_superClass) {
     };
     return C5;
 }(Mix(Protected, Public));
-var C6 = /*#__PURE__*/ function(_superClass) {
+var C6 = /*#__PURE__*/ function(_Mix) {
     "use strict";
-    _inherits(C6, _superClass);
+    _inherits(C6, _Mix);
     var _super = _create_super(C6);
     function C6() {
         _class_call_check(this, C6);
diff --git a/crates/swc/tests/tsc-references/mixinAccessModifiers.2.minified.js b/crates/swc/tests/tsc-references/mixinAccessModifiers.2.minified.js
index 3023a301d12d..b6e1cb7dccf1 100644
--- a/crates/swc/tests/tsc-references/mixinAccessModifiers.2.minified.js
+++ b/crates/swc/tests/tsc-references/mixinAccessModifiers.2.minified.js
@@ -20,9 +20,9 @@ Mix(Private, function Private2() {
     for(var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++)args[_key] = arguments[_key];
     _class_call_check(this, Private2);
 }), Mix(Private, Protected), Mix(Private, Public);
-var C4 = function(_superClass) {
+var C4 = function(_Mix) {
     "use strict";
-    _inherits(C4, _superClass);
+    _inherits(C4, _Mix);
     var _super = _create_super(C4);
     function C4() {
         return _class_call_check(this, C4), _super.apply(this, arguments);
@@ -36,9 +36,9 @@ var C4 = function(_superClass) {
     "use strict";
     for(var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++)args[_key] = arguments[_key];
     _class_call_check(this, Protected2);
-})), C5 = function(_superClass) {
+})), C5 = function(_Mix) {
     "use strict";
-    _inherits(C5, _superClass);
+    _inherits(C5, _Mix);
     var _super = _create_super(C5);
     function C5() {
         return _class_call_check(this, C5), _super.apply(this, arguments);
@@ -48,9 +48,9 @@ var C4 = function(_superClass) {
     }, C5.g = function() {
         C4.s, C5.s, C6.s;
     }, C5;
-}(Mix(Protected, Public)), C6 = function(_superClass) {
+}(Mix(Protected, Public)), C6 = function(_Mix) {
     "use strict";
-    _inherits(C6, _superClass);
+    _inherits(C6, _Mix);
     var _super = _create_super(C6);
     function C6() {
         return _class_call_check(this, C6), _super.apply(this, arguments);
diff --git a/crates/swc/tests/tsc-references/nestedDestructuringOfRequire.1.normal.js b/crates/swc/tests/tsc-references/nestedDestructuringOfRequire.1.normal.js
index e3fbe0ae3991..405808a076dc 100644
--- a/crates/swc/tests/tsc-references/nestedDestructuringOfRequire.1.normal.js
+++ b/crates/swc/tests/tsc-references/nestedDestructuringOfRequire.1.normal.js
@@ -5,6 +5,6 @@ var chalk = {
 };
 module.exports.chalk = chalk;
 //// [main.js]
-var ref = require("./mod1"), grey = ref.chalk.grey;
+var _require = require("./mod1"), grey = _require.chalk.grey;
 grey;
 chalk;
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperator1.1.normal.js b/crates/swc/tests/tsc-references/nullishCoalescingOperator1.1.normal.js
index 82bb24ada14a..3a0ff9b46de6 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperator1.1.normal.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperator1.1.normal.js
@@ -32,8 +32,8 @@ if (maybeBool !== null && maybeBool !== void 0 ? maybeBool : true) {
 } else {
     foo();
 }
-var ref;
-if ((ref = false) !== null && ref !== void 0 ? ref : true) {
+var _ref;
+if ((_ref = false) !== null && _ref !== void 0 ? _ref : true) {
     foo();
 } else {
     foo();
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperator10.1.normal.js b/crates/swc/tests/tsc-references/nullishCoalescingOperator10.1.normal.js
index af40a7a88e46..86c4be2bec9b 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperator10.1.normal.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperator10.1.normal.js
@@ -1,3 +1,3 @@
 //// [nullishCoalescingOperator10.ts]
-var ref;
-var gg = (ref = f()) !== null && ref !== void 0 ? ref : "foo";
+var _f;
+var gg = (_f = f()) !== null && _f !== void 0 ? _f : "foo";
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperator12.1.normal.js b/crates/swc/tests/tsc-references/nullishCoalescingOperator12.1.normal.js
index 4cfe79d1a268..2480b707e6cb 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperator12.1.normal.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperator12.1.normal.js
@@ -2,5 +2,5 @@
 const obj = {
     arr: []
 };
-var ref;
-for (const i of (ref = obj === null || obj === void 0 ? void 0 : obj.arr) !== null && ref !== void 0 ? ref : []){}
+var _ref;
+for (const i of (_ref = obj === null || obj === void 0 ? void 0 : obj.arr) !== null && _ref !== void 0 ? _ref : []){}
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperator12.2.minified.js b/crates/swc/tests/tsc-references/nullishCoalescingOperator12.2.minified.js
index 68a65aa78f01..6bfece459e0e 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperator12.2.minified.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperator12.2.minified.js
@@ -1,6 +1,6 @@
 //// [nullishCoalescingOperator12.ts]
-var ref;
+var _ref;
 const obj = {
     arr: []
 };
-for (const i of null !== (ref = null == obj ? void 0 : obj.arr) && void 0 !== ref ? ref : []);
+for (const i of null !== (_ref = null == obj ? void 0 : obj.arr) && void 0 !== _ref ? _ref : []);
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperator3.1.normal.js b/crates/swc/tests/tsc-references/nullishCoalescingOperator3.1.normal.js
index dfa24d06f6d3..edc5aa11e4bd 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperator3.1.normal.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperator3.1.normal.js
@@ -1,3 +1,3 @@
 //// [nullishCoalescingOperator3.ts]
-var ref, ref1, ref2, ref3, ref4;
-var aa1 = (ref4 = (ref3 = (ref2 = (ref1 = (ref = a1 !== null && a1 !== void 0 ? a1 : a2) !== null && ref !== void 0 ? ref : a3) !== null && ref1 !== void 0 ? ref1 : a4) !== null && ref2 !== void 0 ? ref2 : a5) !== null && ref3 !== void 0 ? ref3 : a6) !== null && ref4 !== void 0 ? ref4 : "whatever";
+var _ref, _ref1, _ref2, _ref3, _ref4;
+var aa1 = (_ref4 = (_ref3 = (_ref2 = (_ref1 = (_ref = a1 !== null && a1 !== void 0 ? a1 : a2) !== null && _ref !== void 0 ? _ref : a3) !== null && _ref1 !== void 0 ? _ref1 : a4) !== null && _ref2 !== void 0 ? _ref2 : a5) !== null && _ref3 !== void 0 ? _ref3 : a6) !== null && _ref4 !== void 0 ? _ref4 : "whatever";
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperator8.1.normal.js b/crates/swc/tests/tsc-references/nullishCoalescingOperator8.1.normal.js
index e2e2e446d281..b2aedf59fb60 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperator8.1.normal.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperator8.1.normal.js
@@ -1,7 +1,7 @@
 //// [nullishCoalescingOperator8.ts]
-var _p;
-var n1 = (_p = a.p) !== null && _p !== void 0 ? _p : "default";
-var ref;
-var n2 = (ref = a.m()) !== null && ref !== void 0 ? ref : "default";
-var ref1, ref2, ref3;
-var n3 = (ref3 = (ref2 = (ref1 = a.m()) !== null && ref1 !== void 0 ? ref1 : b.p) !== null && ref2 !== void 0 ? ref2 : b.m()) !== null && ref3 !== void 0 ? ref3 : "default";
+var _a_p;
+var n1 = (_a_p = a.p) !== null && _a_p !== void 0 ? _a_p : "default";
+var _a_m;
+var n2 = (_a_m = a.m()) !== null && _a_m !== void 0 ? _a_m : "default";
+var _a_m1, _ref, _ref1;
+var n3 = (_ref1 = (_ref = (_a_m1 = a.m()) !== null && _a_m1 !== void 0 ? _a_m1 : b.p) !== null && _ref !== void 0 ? _ref : b.m()) !== null && _ref1 !== void 0 ? _ref1 : "default";
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperator8.2.minified.js b/crates/swc/tests/tsc-references/nullishCoalescingOperator8.2.minified.js
index 90d968cb4f43..be38fd560c23 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperator8.2.minified.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperator8.2.minified.js
@@ -1,3 +1,3 @@
 //// [nullishCoalescingOperator8.ts]
-var ref, ref1;
-a.p, a.m(), null !== (ref1 = null !== (ref = a.m()) && void 0 !== ref ? ref : b.p) && void 0 !== ref1 || b.m();
+var _a_m, _ref;
+a.p, a.m(), null !== (_ref = null !== (_a_m = a.m()) && void 0 !== _a_m ? _a_m : b.p) && void 0 !== _ref || b.m();
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInAsyncGenerator(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInAsyncGenerator(target=es2015).1.normal.js
index b4c3c23ad515..55e55ab7de88 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInAsyncGenerator(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInAsyncGenerator(target=es2015).1.normal.js
@@ -6,8 +6,8 @@ function f(a) {
 }
 function _f() {
     _f = _wrap_async_generator(function*(a) {
-        var _b;
-        let c = (_b = a.b) !== null && _b !== void 0 ? _b : 10;
+        var _a_b;
+        let c = (_a_b = a.b) !== null && _a_b !== void 0 ? _a_b : 10;
         while(c){
             yield c--;
         }
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInAsyncGenerator(target=es5).1.normal.js b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInAsyncGenerator(target=es5).1.normal.js
index a1a76ef77165..1691a2f49c53 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInAsyncGenerator(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInAsyncGenerator(target=es5).1.normal.js
@@ -7,11 +7,11 @@ function f(a) {
 }
 function _f() {
     _f = _wrap_async_generator(function(a) {
-        var _b, c;
+        var _a_b, c;
         return _ts_generator(this, function(_state) {
             switch(_state.label){
                 case 0:
-                    c = (_b = a.b) !== null && _b !== void 0 ? _b : 10;
+                    c = (_a_b = a.b) !== null && _a_b !== void 0 ? _a_b : 10;
                     _state.label = 1;
                 case 1:
                     if (!c) return [
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern(target=es2015).1.normal.js
index 0448136f1c1d..c98892467db8 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern(target=es2015).1.normal.js
@@ -1,5 +1,5 @@
 //// [nullishCoalescingOperatorInParameterBindingPattern.ts]
 // https://github.com/microsoft/TypeScript/issues/36295
 const a = ()=>undefined;
-var ref;
-(({ [(ref = a()) !== null && ref !== void 0 ? ref : "d"]: c = ""  })=>{})();
+var _a;
+(({ [(_a = a()) !== null && _a !== void 0 ? _a : "d"]: c = ""  })=>{})();
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern(target=es5).1.normal.js b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern(target=es5).1.normal.js
index ea1f0a376d47..145f63a7f5eb 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern(target=es5).1.normal.js
@@ -3,7 +3,7 @@
 var a = function() {
     return undefined;
 };
-var ref;
+var _a;
 (function(param) {
-    var tmp = param[(ref = a()) !== null && ref !== void 0 ? ref : "d"], c = tmp === void 0 ? "" : tmp;
+    var tmp = param[(_a = a()) !== null && _a !== void 0 ? _a : "d"], c = tmp === void 0 ? "" : tmp;
 })();
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern.2(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern.2(target=es2015).1.normal.js
index 12abce5f796d..cc50f204e8bc 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern.2(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern.2(target=es2015).1.normal.js
@@ -1,12 +1,12 @@
 //// [nullishCoalescingOperatorInParameterBindingPattern.2.ts]
 // https://github.com/microsoft/TypeScript/issues/36295
 const a = ()=>undefined;
-var ref;
-(({ [(ref = a()) !== null && ref !== void 0 ? ref : "d"]: c = ""  })=>{
+var _a;
+(({ [(_a = a()) !== null && _a !== void 0 ? _a : "d"]: c = ""  })=>{
     var a1;
 })();
 const x = "";
-var ref1;
-(({ [(ref1 = a()) !== null && ref1 !== void 0 ? ref1 : "d"]: c = "" , d =x  })=>{
+var _a1;
+(({ [(_a1 = a()) !== null && _a1 !== void 0 ? _a1 : "d"]: c = "" , d =x  })=>{
     var x1;
 })();
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern.2(target=es5).1.normal.js b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern.2(target=es5).1.normal.js
index 309e7e7104e5..dfdf81a97277 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern.2(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern.2(target=es5).1.normal.js
@@ -3,14 +3,14 @@
 var a = function() {
     return undefined;
 };
-var ref;
+var _a;
 (function(param) {
-    var tmp = param[(ref = a()) !== null && ref !== void 0 ? ref : "d"], c = tmp === void 0 ? "" : tmp;
+    var tmp = param[(_a = a()) !== null && _a !== void 0 ? _a : "d"], c = tmp === void 0 ? "" : tmp;
     var a1;
 })();
 var x = "";
-var ref1;
+var _a1;
 (function(param) {
-    var tmp = param[(ref1 = a()) !== null && ref1 !== void 0 ? ref1 : "d"], c = tmp === void 0 ? "" : tmp, _d = param.d, d = _d === void 0 ? x : _d;
+    var tmp = param[(_a1 = a()) !== null && _a1 !== void 0 ? _a1 : "d"], c = tmp === void 0 ? "" : tmp, _param_d = param.d, d = _param_d === void 0 ? x : _param_d;
     var x1;
 })();
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern.2(target=es5).2.minified.js b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern.2(target=es5).2.minified.js
index 5a50e0567af9..f9b4d7b14200 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern.2(target=es5).2.minified.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterBindingPattern.2(target=es5).2.minified.js
@@ -1,5 +1,5 @@
 //// [nullishCoalescingOperatorInParameterBindingPattern.2.ts]
-var ref, ref1, a = function() {};
-(void 0)[null !== (ref = a()) && void 0 !== ref ? ref : "d"], function(param) {
-    param[null !== (ref1 = a()) && void 0 !== ref1 ? ref1 : "d"], param.d;
+var _a, _a1, a = function() {};
+(void 0)[null !== (_a = a()) && void 0 !== _a ? _a : "d"], function(param) {
+    param[null !== (_a1 = a()) && void 0 !== _a1 ? _a1 : "d"], param.d;
 }();
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer(target=es2015).1.normal.js
index 0a816eb39758..8381e4c99e72 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer(target=es2015).1.normal.js
@@ -1,5 +1,5 @@
 //// [nullishCoalescingOperatorInParameterInitializer.ts]
 // https://github.com/microsoft/TypeScript/issues/36295
 const a = ()=>undefined;
-var ref;
-((b = (ref = a()) !== null && ref !== void 0 ? ref : "d")=>{})();
+var _a;
+((b = (_a = a()) !== null && _a !== void 0 ? _a : "d")=>{})();
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer(target=es5).1.normal.js b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer(target=es5).1.normal.js
index 9073ad085bb9..78cefb872e78 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer(target=es5).1.normal.js
@@ -3,7 +3,7 @@
 var a = function() {
     return undefined;
 };
-var ref;
+var _a;
 (function() {
-    var b = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : (ref = a()) !== null && ref !== void 0 ? ref : "d";
+    var b = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : (_a = a()) !== null && _a !== void 0 ? _a : "d";
 })();
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer.2(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer.2(target=es2015).1.normal.js
index b295359c55f3..bbfabef3c763 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer.2(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer.2(target=es2015).1.normal.js
@@ -1,12 +1,12 @@
 //// [nullishCoalescingOperatorInParameterInitializer.2.ts]
 // https://github.com/microsoft/TypeScript/issues/36295
 const a = ()=>undefined;
-var ref;
-((b = (ref = a()) !== null && ref !== void 0 ? ref : "d")=>{
+var _a;
+((b = (_a = a()) !== null && _a !== void 0 ? _a : "d")=>{
     var a1;
 })();
 const x = "";
-var ref1;
-((b = (ref1 = a()) !== null && ref1 !== void 0 ? ref1 : "d", d = x)=>{
+var _a1;
+((b = (_a1 = a()) !== null && _a1 !== void 0 ? _a1 : "d", d = x)=>{
     var x1;
 })();
diff --git a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer.2(target=es5).1.normal.js b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer.2(target=es5).1.normal.js
index 3bf68e7a6dfb..f8c3465b69cb 100644
--- a/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer.2(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/nullishCoalescingOperatorInParameterInitializer.2(target=es5).1.normal.js
@@ -3,14 +3,14 @@
 var a = function() {
     return undefined;
 };
-var ref;
+var _a;
 (function() {
-    var b = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : (ref = a()) !== null && ref !== void 0 ? ref : "d";
+    var b = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : (_a = a()) !== null && _a !== void 0 ? _a : "d";
     var a1;
 })();
 var x = "";
-var ref1;
+var _a1;
 (function() {
-    var b = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : (ref1 = a()) !== null && ref1 !== void 0 ? ref1 : "d", d = arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : x;
+    var b = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : (_a1 = a()) !== null && _a1 !== void 0 ? _a1 : "d", d = arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : x;
     var x1;
 })();
diff --git a/crates/swc/tests/tsc-references/objectBindingPatternKeywordIdentifiers06.1.normal.js b/crates/swc/tests/tsc-references/objectBindingPatternKeywordIdentifiers06.1.normal.js
index a646330206ab..bad2d76cf9ce 100644
--- a/crates/swc/tests/tsc-references/objectBindingPatternKeywordIdentifiers06.1.normal.js
+++ b/crates/swc/tests/tsc-references/objectBindingPatternKeywordIdentifiers06.1.normal.js
@@ -1,4 +1,4 @@
 //// [objectBindingPatternKeywordIdentifiers06.ts]
-var ref = {
+var _ref = {
     as: 1
-}, as = ref.as;
+}, as = _ref.as;
diff --git a/crates/swc/tests/tsc-references/objectRestForOf.1.normal.js b/crates/swc/tests/tsc-references/objectRestForOf.1.normal.js
index e6f9f46265e7..273f20e85979 100644
--- a/crates/swc/tests/tsc-references/objectRestForOf.1.normal.js
+++ b/crates/swc/tests/tsc-references/objectRestForOf.1.normal.js
@@ -15,10 +15,10 @@ for (let _ref of array){
 let xx;
 let rrestOff;
 for (var _ref1 of array){
-    var __ref;
-    __ref = _ref1, rrestOff = _object_without_properties(__ref, [
+    var _ref2;
+    _ref2 = _ref1, rrestOff = _object_without_properties(_ref2, [
         "x"
-    ]), ({ x: xx  } = __ref), __ref;
+    ]), ({ x: xx  } = _ref2), _ref2;
     [
         xx,
         rrestOff
diff --git a/crates/swc/tests/tsc-references/objectRestForOf.2.minified.js b/crates/swc/tests/tsc-references/objectRestForOf.2.minified.js
index 925a29373ec6..b39d6bfc393d 100644
--- a/crates/swc/tests/tsc-references/objectRestForOf.2.minified.js
+++ b/crates/swc/tests/tsc-references/objectRestForOf.2.minified.js
@@ -4,14 +4,14 @@ import _object_spread from "@swc/helpers/src/_object_spread.mjs";
 import _object_spread_props from "@swc/helpers/src/_object_spread_props.mjs";
 import _object_without_properties from "@swc/helpers/src/_object_without_properties.mjs";
 for (let _ref of array){
-    var __ref, { x  } = _ref;
+    var _ref1, { x  } = _ref;
     _object_without_properties(_ref, [
         "x"
     ]);
 }
-for (var _ref1 of array)_object_without_properties(__ref = _ref1, [
+for (var _ref2 of array)_object_without_properties(_ref1 = _ref2, [
     "x"
-]), { x: xx  } = __ref;
+]), { x: xx  } = _ref1;
 for (let norest of array.map((a)=>_object_spread_props(_object_spread({}, a), {
         x: 'a string'
     })))norest.x, norest.y;
diff --git a/crates/swc/tests/tsc-references/objectRestParameterES5.1.normal.js b/crates/swc/tests/tsc-references/objectRestParameterES5.1.normal.js
index 6d46d27f0c89..59979f072284 100644
--- a/crates/swc/tests/tsc-references/objectRestParameterES5.1.normal.js
+++ b/crates/swc/tests/tsc-references/objectRestParameterES5.1.normal.js
@@ -21,7 +21,7 @@ suddenly(function() {
         },
         y: "noo"
     };
-    var _x = _param.x, _z = _x.z, z = _z === void 0 ? 12 : _z, nested = _object_without_properties(_param.x, [
+    var _param_x = _param.x, _param_x_z = _param_x.z, z = _param_x_z === void 0 ? 12 : _param_x_z, nested = _object_without_properties(_param.x, [
         "z"
     ]), rest = _object_without_properties(_param, [
         "x"
@@ -55,7 +55,7 @@ var C = /*#__PURE__*/ function() {
 }();
 function foobar() {
     var _param = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {};
-    var _bar = _param.bar, bar = _bar === void 0 ? {} : _bar, opts = _object_without_properties(_param, [
+    var _param_bar = _param.bar, bar = _param_bar === void 0 ? {} : _param_bar, opts = _object_without_properties(_param, [
         "bar"
     ]);
 }
diff --git a/crates/swc/tests/tsc-references/optionalBindingParameters3.1.normal.js b/crates/swc/tests/tsc-references/optionalBindingParameters3.1.normal.js
index 1908e61f5625..19d08002b747 100644
--- a/crates/swc/tests/tsc-references/optionalBindingParameters3.1.normal.js
+++ b/crates/swc/tests/tsc-references/optionalBindingParameters3.1.normal.js
@@ -5,5 +5,5 @@
  */ /**
  * @param {Foo} [options]
  */ function f(param) {
-    var _a = param.a, a = _a === void 0 ? "a" : _a;
+    var _param_a = param.a, a = _param_a === void 0 ? "a" : _param_a;
 }
diff --git a/crates/swc/tests/tsc-references/optionalChainingInLoop.1.normal.js b/crates/swc/tests/tsc-references/optionalChainingInLoop.1.normal.js
index c01b3b3506fe..d0c0f4491a23 100644
--- a/crates/swc/tests/tsc-references/optionalChainingInLoop.1.normal.js
+++ b/crates/swc/tests/tsc-references/optionalChainingInLoop.1.normal.js
@@ -12,8 +12,8 @@ try {
         try {
             for(var _iterator = comp.c[Symbol.iterator](), _step1; !(_iteratorNormalCompletion = (_step1 = _iterator.next()).done); _iteratorNormalCompletion = true){
                 var item = _step1.value;
-                var ref;
-                item.v = !!((ref = item.t) === null || ref === void 0 ? void 0 : ref.length);
+                var _item_t;
+                item.v = !!((_item_t = item.t) === null || _item_t === void 0 ? void 0 : _item_t.length);
             }
         } catch (err) {
             _didIteratorError = true;
diff --git a/crates/swc/tests/tsc-references/optionalChainingInLoop.2.minified.js b/crates/swc/tests/tsc-references/optionalChainingInLoop.2.minified.js
index 00d84cce2293..dc6bd4e74a66 100644
--- a/crates/swc/tests/tsc-references/optionalChainingInLoop.2.minified.js
+++ b/crates/swc/tests/tsc-references/optionalChainingInLoop.2.minified.js
@@ -9,8 +9,8 @@ try {
         var _iteratorNormalCompletion = !0, _didIteratorError = !1, _iteratorError = void 0;
         try {
             for(var _step1, _iterator = comp.c[Symbol.iterator](); !(_iteratorNormalCompletion = (_step1 = _iterator.next()).done); _iteratorNormalCompletion = !0){
-                var ref, item = _step1.value;
-                item.v = !!(null === (ref = item.t) || void 0 === ref ? void 0 : ref.length);
+                var _item_t, item = _step1.value;
+                item.v = !!(null === (_item_t = item.t) || void 0 === _item_t ? void 0 : _item_t.length);
             }
         } catch (err) {
             _didIteratorError = !0, _iteratorError = err;
diff --git a/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern(target=es2015).1.normal.js
index 29ee90247cc0..ac57cef81d88 100644
--- a/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern(target=es2015).1.normal.js
@@ -1,5 +1,5 @@
 //// [optionalChainingInParameterBindingPattern.ts]
 // https://github.com/microsoft/TypeScript/issues/36295
-var ref;
+var _a;
 const a = ()=>undefined;
-(({ [(ref = a()) === null || ref === void 0 ? void 0 : ref.d]: c = ""  })=>{})();
+(({ [(_a = a()) === null || _a === void 0 ? void 0 : _a.d]: c = ""  })=>{})();
diff --git a/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern(target=es5).1.normal.js b/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern(target=es5).1.normal.js
index 4d3afbd28ac7..9b8528b50e00 100644
--- a/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern(target=es5).1.normal.js
@@ -1,9 +1,9 @@
 //// [optionalChainingInParameterBindingPattern.ts]
 // https://github.com/microsoft/TypeScript/issues/36295
-var ref;
+var _a;
 var a = function() {
     return undefined;
 };
 (function(param) {
-    var tmp = param[(ref = a()) === null || ref === void 0 ? void 0 : ref.d], c = tmp === void 0 ? "" : tmp;
+    var tmp = param[(_a = a()) === null || _a === void 0 ? void 0 : _a.d], c = tmp === void 0 ? "" : tmp;
 })();
diff --git a/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern.2(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern.2(target=es2015).1.normal.js
index 6fc8eb1216cd..db74042c0608 100644
--- a/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern.2(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern.2(target=es2015).1.normal.js
@@ -1,11 +1,11 @@
 //// [optionalChainingInParameterBindingPattern.2.ts]
 // https://github.com/microsoft/TypeScript/issues/36295
-var ref, ref1;
+var _a, _a1;
 const a = ()=>undefined;
-(({ [(ref = a()) === null || ref === void 0 ? void 0 : ref.d]: c = ""  })=>{
+(({ [(_a = a()) === null || _a === void 0 ? void 0 : _a.d]: c = ""  })=>{
     var a1;
 })();
 const x = "";
-(({ [(ref1 = a()) === null || ref1 === void 0 ? void 0 : ref1.d]: c  }, d = x)=>{
+(({ [(_a1 = a()) === null || _a1 === void 0 ? void 0 : _a1.d]: c  }, d = x)=>{
     var x1;
 })();
diff --git a/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern.2(target=es5).1.normal.js b/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern.2(target=es5).1.normal.js
index 59bc265acc4e..f1e790c9b056 100644
--- a/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern.2(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern.2(target=es5).1.normal.js
@@ -1,15 +1,15 @@
 //// [optionalChainingInParameterBindingPattern.2.ts]
 // https://github.com/microsoft/TypeScript/issues/36295
-var ref, ref1;
+var _a, _a1;
 var a = function() {
     return undefined;
 };
 (function(param) {
-    var tmp = param[(ref = a()) === null || ref === void 0 ? void 0 : ref.d], c = tmp === void 0 ? "" : tmp;
+    var tmp = param[(_a = a()) === null || _a === void 0 ? void 0 : _a.d], c = tmp === void 0 ? "" : tmp;
     var a1;
 })();
 var x = "";
 (function(param) {
-    var c = param[(ref1 = a()) === null || ref1 === void 0 ? void 0 : ref1.d], d = arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : x;
+    var c = param[(_a1 = a()) === null || _a1 === void 0 ? void 0 : _a1.d], d = arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : x;
     var x1;
 })();
diff --git a/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern.2(target=es5).2.minified.js b/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern.2(target=es5).2.minified.js
index e866aa1c6331..36349b3b23e2 100644
--- a/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern.2(target=es5).2.minified.js
+++ b/crates/swc/tests/tsc-references/optionalChainingInParameterBindingPattern.2(target=es5).2.minified.js
@@ -1,5 +1,5 @@
 //// [optionalChainingInParameterBindingPattern.2.ts]
-var ref, ref1, a = function() {};
-(void 0)[null === (ref = a()) || void 0 === ref ? void 0 : ref.d], function() {
-    (void 0)[null === (ref1 = a()) || void 0 === ref1 ? void 0 : ref1.d], arguments.length > 1 && void 0 !== arguments[1] && arguments[1];
+var _a, _a1, a = function() {};
+(void 0)[null === (_a = a()) || void 0 === _a ? void 0 : _a.d], function() {
+    (void 0)[null === (_a1 = a()) || void 0 === _a1 ? void 0 : _a1.d], arguments.length > 1 && void 0 !== arguments[1] && arguments[1];
 }();
diff --git a/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer(target=es2015).1.normal.js
index 4647bf717b12..949041a21650 100644
--- a/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer(target=es2015).1.normal.js
@@ -1,5 +1,5 @@
 //// [optionalChainingInParameterInitializer.ts]
 // https://github.com/microsoft/TypeScript/issues/36295
-var ref;
+var _a;
 const a = ()=>undefined;
-((b = (ref = a()) === null || ref === void 0 ? void 0 : ref.d)=>{})();
+((b = (_a = a()) === null || _a === void 0 ? void 0 : _a.d)=>{})();
diff --git a/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer(target=es5).1.normal.js b/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer(target=es5).1.normal.js
index 66bb50866469..4e94e87f4197 100644
--- a/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer(target=es5).1.normal.js
@@ -1,9 +1,9 @@
 //// [optionalChainingInParameterInitializer.ts]
 // https://github.com/microsoft/TypeScript/issues/36295
-var ref;
+var _a;
 var a = function() {
     return undefined;
 };
 (function() {
-    var b = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : (ref = a()) === null || ref === void 0 ? void 0 : ref.d;
+    var b = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : (_a = a()) === null || _a === void 0 ? void 0 : _a.d;
 })();
diff --git a/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer(target=es5).2.minified.js b/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer(target=es5).2.minified.js
index aa26f0546031..03b2d3f52f91 100644
--- a/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer(target=es5).2.minified.js
+++ b/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer(target=es5).2.minified.js
@@ -1,5 +1,5 @@
 //// [optionalChainingInParameterInitializer.ts]
-var ref, a = function() {};
+var _a, a = function() {};
 !function() {
-    arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : null === (ref = a()) || void 0 === ref || ref.d;
+    arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : null === (_a = a()) || void 0 === _a || _a.d;
 }();
diff --git a/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer.2(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer.2(target=es2015).1.normal.js
index c15a40308d11..4db8054ef862 100644
--- a/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer.2(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer.2(target=es2015).1.normal.js
@@ -1,11 +1,11 @@
 //// [optionalChainingInParameterInitializer.2.ts]
 // https://github.com/microsoft/TypeScript/issues/36295
-var ref, ref1;
+var _a, _a1;
 const a = ()=>undefined;
-((b = (ref = a()) === null || ref === void 0 ? void 0 : ref.d)=>{
+((b = (_a = a()) === null || _a === void 0 ? void 0 : _a.d)=>{
     var a1;
 })();
 const x = "";
-((b = (ref1 = a()) === null || ref1 === void 0 ? void 0 : ref1.d, d = x)=>{
+((b = (_a1 = a()) === null || _a1 === void 0 ? void 0 : _a1.d, d = x)=>{
     var x1;
 })();
diff --git a/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer.2(target=es5).1.normal.js b/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer.2(target=es5).1.normal.js
index 3faaf23d354d..b37bf3d45a69 100644
--- a/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer.2(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer.2(target=es5).1.normal.js
@@ -1,15 +1,15 @@
 //// [optionalChainingInParameterInitializer.2.ts]
 // https://github.com/microsoft/TypeScript/issues/36295
-var ref, ref1;
+var _a, _a1;
 var a = function() {
     return undefined;
 };
 (function() {
-    var b = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : (ref = a()) === null || ref === void 0 ? void 0 : ref.d;
+    var b = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : (_a = a()) === null || _a === void 0 ? void 0 : _a.d;
     var a1;
 })();
 var x = "";
 (function() {
-    var b = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : (ref1 = a()) === null || ref1 === void 0 ? void 0 : ref1.d, d = arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : x;
+    var b = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : (_a1 = a()) === null || _a1 === void 0 ? void 0 : _a1.d, d = arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : x;
     var x1;
 })();
diff --git a/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer.2(target=es5).2.minified.js b/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer.2(target=es5).2.minified.js
index 503029171c58..a2a2789b52b1 100644
--- a/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer.2(target=es5).2.minified.js
+++ b/crates/swc/tests/tsc-references/optionalChainingInParameterInitializer.2(target=es5).2.minified.js
@@ -1,7 +1,7 @@
 //// [optionalChainingInParameterInitializer.2.ts]
-var ref, ref1, a = function() {};
+var _a, _a1, a = function() {};
 !function() {
-    arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : null === (ref = a()) || void 0 === ref || ref.d;
+    arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : null === (_a = a()) || void 0 === _a || _a.d;
 }(), function() {
-    arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : null === (ref1 = a()) || void 0 === ref1 || ref1.d, arguments.length > 1 && void 0 !== arguments[1] && arguments[1];
+    arguments.length > 0 && void 0 !== arguments[0] ? arguments[0] : null === (_a1 = a()) || void 0 === _a1 || _a1.d, arguments.length > 1 && void 0 !== arguments[1] && arguments[1];
 }();
diff --git a/crates/swc/tests/tsc-references/optionalChainingInTypeAssertions(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/optionalChainingInTypeAssertions(target=es2015).1.normal.js
index 7f496687f3a7..444a346e35a6 100644
--- a/crates/swc/tests/tsc-references/optionalChainingInTypeAssertions(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/optionalChainingInTypeAssertions(target=es2015).1.normal.js
@@ -1,13 +1,13 @@
 //// [optionalChainingInTypeAssertions.ts]
-var ref, ref1, /*a1*/ /*a2*/ ref2, /*b1*/ ref3 /*b3*/ ;
+var _foo_m, _foo_m1, /*a1*/ /*a2*/ _foo_m2, /*b1*/ _foo_m3 /*b3*/ ;
 class Foo {
     m() {}
 }
 const foo = new Foo();
-(ref = foo.m) === null || ref === void 0 ? void 0 : ref.call(foo);
-(ref1 = foo.m) === null || ref1 === void 0 ? void 0 : ref1.call(foo);
-(ref2 = foo.m) === null || ref2 === void 0 ? void 0 : ref2.call(foo);
-(ref3 = foo.m) === null || ref3 === void 0 ? void 0 : ref3.call(foo);
+(_foo_m = foo.m) === null || _foo_m === void 0 ? void 0 : _foo_m.call(foo);
+(_foo_m1 = foo.m) === null || _foo_m1 === void 0 ? void 0 : _foo_m1.call(foo);
+(_foo_m2 = foo.m) === null || _foo_m2 === void 0 ? void 0 : _foo_m2.call(foo);
+(_foo_m3 = foo.m) === null || _foo_m3 === void 0 ? void 0 : _foo_m3.call(foo);
 // https://github.com/microsoft/TypeScript/issues/50148
 (foo === null || foo === void 0 ? void 0 : foo.m).length;
 (foo === null || foo === void 0 ? void 0 : foo.m).length;
diff --git a/crates/swc/tests/tsc-references/optionalChainingInTypeAssertions(target=es2015).2.minified.js b/crates/swc/tests/tsc-references/optionalChainingInTypeAssertions(target=es2015).2.minified.js
index 376e00286978..2409a2c321d8 100644
--- a/crates/swc/tests/tsc-references/optionalChainingInTypeAssertions(target=es2015).2.minified.js
+++ b/crates/swc/tests/tsc-references/optionalChainingInTypeAssertions(target=es2015).2.minified.js
@@ -1,6 +1,6 @@
 //// [optionalChainingInTypeAssertions.ts]
-var ref, ref1, ref2, ref3;
+var _foo_m, _foo_m1, _foo_m2, _foo_m3;
 const foo = new class {
     m() {}
 }();
-null === (ref = foo.m) || void 0 === ref || ref.call(foo), null === (ref1 = foo.m) || void 0 === ref1 || ref1.call(foo), null === (ref2 = foo.m) || void 0 === ref2 || ref2.call(foo), null === (ref3 = foo.m) || void 0 === ref3 || ref3.call(foo), (null == foo ? void 0 : foo.m).length, (null == foo ? void 0 : foo.m).length, (null == foo ? void 0 : foo.m).length, (null == foo ? void 0 : foo.m).length;
+null === (_foo_m = foo.m) || void 0 === _foo_m || _foo_m.call(foo), null === (_foo_m1 = foo.m) || void 0 === _foo_m1 || _foo_m1.call(foo), null === (_foo_m2 = foo.m) || void 0 === _foo_m2 || _foo_m2.call(foo), null === (_foo_m3 = foo.m) || void 0 === _foo_m3 || _foo_m3.call(foo), (null == foo ? void 0 : foo.m).length, (null == foo ? void 0 : foo.m).length, (null == foo ? void 0 : foo.m).length, (null == foo ? void 0 : foo.m).length;
diff --git a/crates/swc/tests/tsc-references/parameterInitializersBackwardReferencing(target=es5).1.normal.js b/crates/swc/tests/tsc-references/parameterInitializersBackwardReferencing(target=es5).1.normal.js
index 3d744b243737..d0135564086c 100644
--- a/crates/swc/tests/tsc-references/parameterInitializersBackwardReferencing(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/parameterInitializersBackwardReferencing(target=es5).1.normal.js
@@ -1,14 +1,14 @@
 //// [parameterInitializersBackwardReferencing.ts]
 // https://github.com/microsoft/TypeScript/issues/38243
 function test0() {
-    var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {}, _a = ref.a, a = _a === void 0 ? 0 : _a, _b = ref.b, b = _b === void 0 ? a : _b;
+    var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {}, _ref_a = _ref.a, a = _ref_a === void 0 ? 0 : _ref_a, _ref_b = _ref.b, b = _ref_b === void 0 ? a : _ref_b;
     return {
         a: a,
         b: b
     };
 }
 function test1() {
-    var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {}, tmp = ref.c, ref1 = tmp === void 0 ? {} : tmp, _a = ref1.a, a = _a === void 0 ? 0 : _a, _b = ref1.b, b = _b === void 0 ? a : _b;
+    var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {}, tmp = _ref.c, _ref1 = tmp === void 0 ? {} : tmp, _ref_a = _ref1.a, a = _ref_a === void 0 ? 0 : _ref_a, _ref_b = _ref1.b, b = _ref_b === void 0 ? a : _ref_b;
     return {
         a: a,
         b: b
diff --git a/crates/swc/tests/tsc-references/parameterInitializersForwardReferencing.2(target=es5).1.normal.js b/crates/swc/tests/tsc-references/parameterInitializersForwardReferencing.2(target=es5).1.normal.js
index 79d952fe2888..13cf5e5693e3 100644
--- a/crates/swc/tests/tsc-references/parameterInitializersForwardReferencing.2(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/parameterInitializersForwardReferencing.2(target=es5).1.normal.js
@@ -4,7 +4,7 @@ import _object_without_properties from "@swc/helpers/src/_object_without_propert
 function a() {}
 function b() {
     var _param = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : a();
-    var _b = _param.b, b = _b === void 0 ? a() : _b, x = _object_without_properties(_param, [
+    var _param_b = _param.b, b = _param_b === void 0 ? a() : _param_b, x = _object_without_properties(_param, [
         "b"
     ]);
     var _$a;
diff --git a/crates/swc/tests/tsc-references/parserES5ForOfStatement11.1.normal.js b/crates/swc/tests/tsc-references/parserES5ForOfStatement11.1.normal.js
index c3e714d7a55d..737eb693f257 100644
--- a/crates/swc/tests/tsc-references/parserES5ForOfStatement11.1.normal.js
+++ b/crates/swc/tests/tsc-references/parserES5ForOfStatement11.1.normal.js
@@ -3,7 +3,7 @@ import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 var _iteratorNormalCompletion = true, _didIteratorError = false, _iteratorError = undefined;
 try {
     for(var _iterator = X[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true){
-        var _value = _sliced_to_array(_step.value, 2), a = _value[0], b = _value[1];
+        var _step_value = _sliced_to_array(_step.value, 2), a = _step_value[0], b = _step_value[1];
     }
 } catch (err) {
     _didIteratorError = true;
diff --git a/crates/swc/tests/tsc-references/parserES5ForOfStatement11.2.minified.js b/crates/swc/tests/tsc-references/parserES5ForOfStatement11.2.minified.js
index 8121fd4609ca..c254373f5904 100644
--- a/crates/swc/tests/tsc-references/parserES5ForOfStatement11.2.minified.js
+++ b/crates/swc/tests/tsc-references/parserES5ForOfStatement11.2.minified.js
@@ -3,8 +3,8 @@ import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 var _iteratorNormalCompletion = !0, _didIteratorError = !1, _iteratorError = void 0;
 try {
     for(var _step, _iterator = X[Symbol.iterator](); !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = !0){
-        var _value = _sliced_to_array(_step.value, 2);
-        _value[0], _value[1];
+        var _step_value = _sliced_to_array(_step.value, 2);
+        _step_value[0], _step_value[1];
     }
 } catch (err) {
     _didIteratorError = !0, _iteratorError = err;
diff --git a/crates/swc/tests/tsc-references/parserES5ForOfStatement12.1.normal.js b/crates/swc/tests/tsc-references/parserES5ForOfStatement12.1.normal.js
index b1176852098c..1a1684f9d13a 100644
--- a/crates/swc/tests/tsc-references/parserES5ForOfStatement12.1.normal.js
+++ b/crates/swc/tests/tsc-references/parserES5ForOfStatement12.1.normal.js
@@ -2,7 +2,7 @@
 var _iteratorNormalCompletion = true, _didIteratorError = false, _iteratorError = undefined;
 try {
     for(var _iterator = X[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true){
-        var _value = _step.value, a = _value.a, b = _value.b;
+        var _step_value = _step.value, a = _step_value.a, b = _step_value.b;
     }
 } catch (err) {
     _didIteratorError = true;
diff --git a/crates/swc/tests/tsc-references/parserES5ForOfStatement12.2.minified.js b/crates/swc/tests/tsc-references/parserES5ForOfStatement12.2.minified.js
index c4e4e8b3415d..79b599367d15 100644
--- a/crates/swc/tests/tsc-references/parserES5ForOfStatement12.2.minified.js
+++ b/crates/swc/tests/tsc-references/parserES5ForOfStatement12.2.minified.js
@@ -2,8 +2,8 @@
 var _iteratorNormalCompletion = !0, _didIteratorError = !1, _iteratorError = void 0;
 try {
     for(var _step, _iterator = X[Symbol.iterator](); !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = !0){
-        var _value = _step.value;
-        _value.a, _value.b;
+        var _step_value = _step.value;
+        _step_value.a, _step_value.b;
     }
 } catch (err) {
     _didIteratorError = !0, _iteratorError = err;
diff --git a/crates/swc/tests/tsc-references/parserES5ForOfStatement13.1.normal.js b/crates/swc/tests/tsc-references/parserES5ForOfStatement13.1.normal.js
index f4c806240a18..011d1d93ae47 100644
--- a/crates/swc/tests/tsc-references/parserES5ForOfStatement13.1.normal.js
+++ b/crates/swc/tests/tsc-references/parserES5ForOfStatement13.1.normal.js
@@ -2,7 +2,7 @@
 var _iteratorNormalCompletion = true, _didIteratorError = false, _iteratorError = undefined;
 try {
     for(var _iterator = X[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true){
-        var _value = _step.value, a = _value.a, b = _value.b;
+        var _step_value = _step.value, a = _step_value.a, b = _step_value.b;
     }
 } catch (err) {
     _didIteratorError = true;
diff --git a/crates/swc/tests/tsc-references/parserES5ForOfStatement13.2.minified.js b/crates/swc/tests/tsc-references/parserES5ForOfStatement13.2.minified.js
index 035f49bc0b53..b51aec88ea72 100644
--- a/crates/swc/tests/tsc-references/parserES5ForOfStatement13.2.minified.js
+++ b/crates/swc/tests/tsc-references/parserES5ForOfStatement13.2.minified.js
@@ -2,8 +2,8 @@
 var _iteratorNormalCompletion = !0, _didIteratorError = !1, _iteratorError = void 0;
 try {
     for(var _step, _iterator = X[Symbol.iterator](); !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = !0){
-        var _value = _step.value;
-        _value.a, _value.b;
+        var _step_value = _step.value;
+        _step_value.a, _step_value.b;
     }
 } catch (err) {
     _didIteratorError = !0, _iteratorError = err;
diff --git a/crates/swc/tests/tsc-references/parserES5ForOfStatement14.1.normal.js b/crates/swc/tests/tsc-references/parserES5ForOfStatement14.1.normal.js
index 89188ffdd752..b72598c60494 100644
--- a/crates/swc/tests/tsc-references/parserES5ForOfStatement14.1.normal.js
+++ b/crates/swc/tests/tsc-references/parserES5ForOfStatement14.1.normal.js
@@ -3,7 +3,7 @@ import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 var _iteratorNormalCompletion = true, _didIteratorError = false, _iteratorError = undefined;
 try {
     for(var _iterator = X[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true){
-        var _value = _sliced_to_array(_step.value, 2), a = _value[0], b = _value[1];
+        var _step_value = _sliced_to_array(_step.value, 2), a = _step_value[0], b = _step_value[1];
     }
 } catch (err) {
     _didIteratorError = true;
diff --git a/crates/swc/tests/tsc-references/parserES5ForOfStatement14.2.minified.js b/crates/swc/tests/tsc-references/parserES5ForOfStatement14.2.minified.js
index 0faa2c36b984..bc3d0e2424b3 100644
--- a/crates/swc/tests/tsc-references/parserES5ForOfStatement14.2.minified.js
+++ b/crates/swc/tests/tsc-references/parserES5ForOfStatement14.2.minified.js
@@ -3,8 +3,8 @@ import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 var _iteratorNormalCompletion = !0, _didIteratorError = !1, _iteratorError = void 0;
 try {
     for(var _step, _iterator = X[Symbol.iterator](); !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = !0){
-        var _value = _sliced_to_array(_step.value, 2);
-        _value[0], _value[1];
+        var _step_value = _sliced_to_array(_step.value, 2);
+        _step_value[0], _step_value[1];
     }
 } catch (err) {
     _didIteratorError = !0, _iteratorError = err;
diff --git a/crates/swc/tests/tsc-references/parserES5ForOfStatement15.1.normal.js b/crates/swc/tests/tsc-references/parserES5ForOfStatement15.1.normal.js
index 624bf3be9e7a..861ff9dbd4eb 100644
--- a/crates/swc/tests/tsc-references/parserES5ForOfStatement15.1.normal.js
+++ b/crates/swc/tests/tsc-references/parserES5ForOfStatement15.1.normal.js
@@ -3,7 +3,7 @@ import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 var _iteratorNormalCompletion = true, _didIteratorError = false, _iteratorError = undefined;
 try {
     for(var _iterator = X[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true){
-        var _value = _sliced_to_array(_step.value, 2), a = _value[0], b = _value[1];
+        var _step_value = _sliced_to_array(_step.value, 2), a = _step_value[0], b = _step_value[1];
     }
 } catch (err) {
     _didIteratorError = true;
diff --git a/crates/swc/tests/tsc-references/parserES5ForOfStatement15.2.minified.js b/crates/swc/tests/tsc-references/parserES5ForOfStatement15.2.minified.js
index 6d39116a5000..7fdff0e79db7 100644
--- a/crates/swc/tests/tsc-references/parserES5ForOfStatement15.2.minified.js
+++ b/crates/swc/tests/tsc-references/parserES5ForOfStatement15.2.minified.js
@@ -3,8 +3,8 @@ import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 var _iteratorNormalCompletion = !0, _didIteratorError = !1, _iteratorError = void 0;
 try {
     for(var _step, _iterator = X[Symbol.iterator](); !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = !0){
-        var _value = _sliced_to_array(_step.value, 2);
-        _value[0], _value[1];
+        var _step_value = _sliced_to_array(_step.value, 2);
+        _step_value[0], _step_value[1];
     }
 } catch (err) {
     _didIteratorError = !0, _iteratorError = err;
diff --git a/crates/swc/tests/tsc-references/parserES5ForOfStatement16.1.normal.js b/crates/swc/tests/tsc-references/parserES5ForOfStatement16.1.normal.js
index decd540dafd6..6d138abc1bc3 100644
--- a/crates/swc/tests/tsc-references/parserES5ForOfStatement16.1.normal.js
+++ b/crates/swc/tests/tsc-references/parserES5ForOfStatement16.1.normal.js
@@ -2,7 +2,7 @@
 var _iteratorNormalCompletion = true, _didIteratorError = false, _iteratorError = undefined;
 try {
     for(var _iterator = X[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true){
-        var _value = _step.value, a = _value.a, b = _value.b;
+        var _step_value = _step.value, a = _step_value.a, b = _step_value.b;
     }
 } catch (err) {
     _didIteratorError = true;
diff --git a/crates/swc/tests/tsc-references/parserES5ForOfStatement16.2.minified.js b/crates/swc/tests/tsc-references/parserES5ForOfStatement16.2.minified.js
index f5cd78f6c1a6..059eabdbc221 100644
--- a/crates/swc/tests/tsc-references/parserES5ForOfStatement16.2.minified.js
+++ b/crates/swc/tests/tsc-references/parserES5ForOfStatement16.2.minified.js
@@ -2,8 +2,8 @@
 var _iteratorNormalCompletion = !0, _didIteratorError = !1, _iteratorError = void 0;
 try {
     for(var _step, _iterator = X[Symbol.iterator](); !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = !0){
-        var _value = _step.value;
-        _value.a, _value.b;
+        var _step_value = _step.value;
+        _step_value.a, _step_value.b;
     }
 } catch (err) {
     _didIteratorError = !0, _iteratorError = err;
diff --git a/crates/swc/tests/tsc-references/parserES5SymbolProperty6.1.normal.js b/crates/swc/tests/tsc-references/parserES5SymbolProperty6.1.normal.js
index 442582f3c373..9dcc04a9a412 100644
--- a/crates/swc/tests/tsc-references/parserES5SymbolProperty6.1.normal.js
+++ b/crates/swc/tests/tsc-references/parserES5SymbolProperty6.1.normal.js
@@ -1,8 +1,8 @@
 //// [parserES5SymbolProperty6.ts]
 import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
-var _toStringTag = Symbol.toStringTag;
+var _Symbol_toStringTag = Symbol.toStringTag;
 var C = function C() {
     "use strict";
     _class_call_check(this, C);
-    this[_toStringTag] = "";
+    this[_Symbol_toStringTag] = "";
 };
diff --git a/crates/swc/tests/tsc-references/parserSymbolProperty6.1.normal.js b/crates/swc/tests/tsc-references/parserSymbolProperty6.1.normal.js
index 18e37fbb9f11..e8169135febf 100644
--- a/crates/swc/tests/tsc-references/parserSymbolProperty6.1.normal.js
+++ b/crates/swc/tests/tsc-references/parserSymbolProperty6.1.normal.js
@@ -1,7 +1,7 @@
 //// [parserSymbolProperty6.ts]
-let _toStringTag = Symbol.toStringTag;
+let _Symbol_toStringTag = Symbol.toStringTag;
 class C {
     constructor(){
-        this[_toStringTag] = "";
+        this[_Symbol_toStringTag] = "";
     }
 }
diff --git a/crates/swc/tests/tsc-references/privateNameAccessorsCallExpression.1.normal.js b/crates/swc/tests/tsc-references/privateNameAccessorsCallExpression.1.normal.js
index da4956435825..f719d0bd9ed4 100644
--- a/crates/swc/tests/tsc-references/privateNameAccessorsCallExpression.1.normal.js
+++ b/crates/swc/tests/tsc-references/privateNameAccessorsCallExpression.1.normal.js
@@ -4,7 +4,7 @@ import _class_private_field_init from "@swc/helpers/src/_class_private_field_ini
 var _fieldFunc = /*#__PURE__*/ new WeakMap(), _fieldFunc2 = /*#__PURE__*/ new WeakMap();
 class A {
     test() {
-        var _ref;
+        var _this_getInstance;
         _class_private_field_get(this, _fieldFunc).call(this);
         const func = _class_private_field_get(this, _fieldFunc);
         func();
@@ -16,7 +16,7 @@ class A {
         _class_private_field_get(this, _fieldFunc2).call(this, 0, ...arr, 3);
         const b = new (_class_private_field_get(this, _fieldFunc2))(0, ...arr, 3);
         const str = _class_private_field_get(this, _fieldFunc2).bind(this)`head${1}middle${2}tail`;
-        _class_private_field_get(_ref = this.getInstance(), _fieldFunc2).bind(_ref)`test${1}and${2}`;
+        _class_private_field_get(_this_getInstance = this.getInstance(), _fieldFunc2).bind(_this_getInstance)`test${1}and${2}`;
     }
     getInstance() {
         return new A();
diff --git a/crates/swc/tests/tsc-references/privateNameComputedPropertyName2(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/privateNameComputedPropertyName2(target=es2015).1.normal.js
index 8ce313ca065a..5bf3774e47a1 100644
--- a/crates/swc/tests/tsc-references/privateNameComputedPropertyName2(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/privateNameComputedPropertyName2(target=es2015).1.normal.js
@@ -3,9 +3,9 @@ import _class_private_field_get from "@swc/helpers/src/_class_private_field_get.
 import _class_private_field_init from "@swc/helpers/src/_class_private_field_init.mjs";
 let getX;
 var _x = /*#__PURE__*/ new WeakMap();
-let tmp = (getX = (a)=>_class_private_field_get(a, _x), "_");
+let _tmp = (getX = (a)=>_class_private_field_get(a, _x), "_");
 class A {
-    [tmp]() {}
+    [_tmp]() {}
     constructor(){
         _class_private_field_init(this, _x, {
             writable: true,
diff --git a/crates/swc/tests/tsc-references/privateNameComputedPropertyName3(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/privateNameComputedPropertyName3(target=es2015).1.normal.js
index ae513e8072c1..396fe9014483 100644
--- a/crates/swc/tests/tsc-references/privateNameComputedPropertyName3(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/privateNameComputedPropertyName3(target=es2015).1.normal.js
@@ -7,9 +7,9 @@ class Foo {
     getValue(x) {
         const obj = this;
         var _y = /*#__PURE__*/ new WeakMap();
-        let tmp = _class_private_field_get(obj, _name);
+        let _class_private_field_get1 = _class_private_field_get(obj, _name);
         class Bar {
-            [tmp]() {
+            [_class_private_field_get1]() {
                 return x + _class_private_field_get(this, _y);
             }
             constructor(){
diff --git a/crates/swc/tests/tsc-references/privateNameComputedPropertyName3(target=es2015).2.minified.js b/crates/swc/tests/tsc-references/privateNameComputedPropertyName3(target=es2015).2.minified.js
index cd84d5ccd87d..dc74b05659c1 100644
--- a/crates/swc/tests/tsc-references/privateNameComputedPropertyName3(target=es2015).2.minified.js
+++ b/crates/swc/tests/tsc-references/privateNameComputedPropertyName3(target=es2015).2.minified.js
@@ -6,9 +6,9 @@ var _name = new WeakMap();
 console.log(new class {
     getValue(x) {
         var _y = new WeakMap();
-        let tmp = _class_private_field_get(this, _name);
+        let _class_private_field_get1 = _class_private_field_get(this, _name);
         return new class {
-            [tmp]() {
+            [_class_private_field_get1]() {
                 return x + _class_private_field_get(this, _y);
             }
             constructor(){
diff --git a/crates/swc/tests/tsc-references/privateNameFieldAssignment.1.normal.js b/crates/swc/tests/tsc-references/privateNameFieldAssignment.1.normal.js
index f9e11bbc9dfe..c05568ccf02f 100644
--- a/crates/swc/tests/tsc-references/privateNameFieldAssignment.1.normal.js
+++ b/crates/swc/tests/tsc-references/privateNameFieldAssignment.1.normal.js
@@ -8,7 +8,7 @@ class A {
         return new A();
     }
     constructor(){
-        var _ref, _ref1, _ref2, _ref3, _ref4, _ref5, _ref6, _ref7, _ref8, _ref9, _ref10, _ref11;
+        var _A_getInstance, _A_getInstance1, _A_getInstance2, _A_getInstance3, _A_getInstance4, _A_getInstance5, _A_getInstance6, _A_getInstance7, _A_getInstance8, _A_getInstance9, _A_getInstance10, _A_getInstance11;
         _class_private_field_init(this, _field, {
             writable: true,
             value: 0
@@ -27,17 +27,17 @@ class A {
         _class_private_field_set(this, _field, _class_private_field_get(this, _field) | 12);
         _class_private_field_set(this, _field, _class_private_field_get(this, _field) ^ 13);
         _class_private_field_set(A.getInstance(), _field, 1);
-        _class_private_field_set(_ref = A.getInstance(), _field, _class_private_field_get(_ref, _field) + 2);
-        _class_private_field_set(_ref1 = A.getInstance(), _field, _class_private_field_get(_ref1, _field) - 3);
-        _class_private_field_set(_ref2 = A.getInstance(), _field, _class_private_field_get(_ref2, _field) / 4);
-        _class_private_field_set(_ref3 = A.getInstance(), _field, _class_private_field_get(_ref3, _field) * 5);
-        _class_private_field_set(_ref4 = A.getInstance(), _field, Math.pow(_class_private_field_get(_ref4, _field), 6));
-        _class_private_field_set(_ref5 = A.getInstance(), _field, _class_private_field_get(_ref5, _field) % 7);
-        _class_private_field_set(_ref6 = A.getInstance(), _field, _class_private_field_get(_ref6, _field) << 8);
-        _class_private_field_set(_ref7 = A.getInstance(), _field, _class_private_field_get(_ref7, _field) >> 9);
-        _class_private_field_set(_ref8 = A.getInstance(), _field, _class_private_field_get(_ref8, _field) >>> 10);
-        _class_private_field_set(_ref9 = A.getInstance(), _field, _class_private_field_get(_ref9, _field) & 11);
-        _class_private_field_set(_ref10 = A.getInstance(), _field, _class_private_field_get(_ref10, _field) | 12);
-        _class_private_field_set(_ref11 = A.getInstance(), _field, _class_private_field_get(_ref11, _field) ^ 13);
+        _class_private_field_set(_A_getInstance = A.getInstance(), _field, _class_private_field_get(_A_getInstance, _field) + 2);
+        _class_private_field_set(_A_getInstance1 = A.getInstance(), _field, _class_private_field_get(_A_getInstance1, _field) - 3);
+        _class_private_field_set(_A_getInstance2 = A.getInstance(), _field, _class_private_field_get(_A_getInstance2, _field) / 4);
+        _class_private_field_set(_A_getInstance3 = A.getInstance(), _field, _class_private_field_get(_A_getInstance3, _field) * 5);
+        _class_private_field_set(_A_getInstance4 = A.getInstance(), _field, Math.pow(_class_private_field_get(_A_getInstance4, _field), 6));
+        _class_private_field_set(_A_getInstance5 = A.getInstance(), _field, _class_private_field_get(_A_getInstance5, _field) % 7);
+        _class_private_field_set(_A_getInstance6 = A.getInstance(), _field, _class_private_field_get(_A_getInstance6, _field) << 8);
+        _class_private_field_set(_A_getInstance7 = A.getInstance(), _field, _class_private_field_get(_A_getInstance7, _field) >> 9);
+        _class_private_field_set(_A_getInstance8 = A.getInstance(), _field, _class_private_field_get(_A_getInstance8, _field) >>> 10);
+        _class_private_field_set(_A_getInstance9 = A.getInstance(), _field, _class_private_field_get(_A_getInstance9, _field) & 11);
+        _class_private_field_set(_A_getInstance10 = A.getInstance(), _field, _class_private_field_get(_A_getInstance10, _field) | 12);
+        _class_private_field_set(_A_getInstance11 = A.getInstance(), _field, _class_private_field_get(_A_getInstance11, _field) ^ 13);
     }
 }
diff --git a/crates/swc/tests/tsc-references/privateNameFieldCallExpression.1.normal.js b/crates/swc/tests/tsc-references/privateNameFieldCallExpression.1.normal.js
index 68c648590288..908da134d18c 100644
--- a/crates/swc/tests/tsc-references/privateNameFieldCallExpression.1.normal.js
+++ b/crates/swc/tests/tsc-references/privateNameFieldCallExpression.1.normal.js
@@ -4,10 +4,10 @@ import _class_private_field_init from "@swc/helpers/src/_class_private_field_ini
 var _fieldFunc = /*#__PURE__*/ new WeakMap(), _fieldFunc2 = /*#__PURE__*/ new WeakMap();
 class A {
     test() {
-        var ref;
-        var _ref;
+        var _class_private_field_get1;
+        var _this_getInstance;
         _class_private_field_get(this, _fieldFunc).call(this);
-        (ref = _class_private_field_get(this, _fieldFunc)) === null || ref === void 0 ? void 0 : ref.call(this);
+        (_class_private_field_get1 = _class_private_field_get(this, _fieldFunc)) === null || _class_private_field_get1 === void 0 ? void 0 : _class_private_field_get1.call(this);
         const func = _class_private_field_get(this, _fieldFunc);
         func();
         new (_class_private_field_get(this, _fieldFunc))();
@@ -18,7 +18,7 @@ class A {
         _class_private_field_get(this, _fieldFunc2).call(this, 0, ...arr, 3);
         const b = new (_class_private_field_get(this, _fieldFunc2))(0, ...arr, 3);
         const str = _class_private_field_get(this, _fieldFunc2).bind(this)`head${1}middle${2}tail`;
-        _class_private_field_get(_ref = this.getInstance(), _fieldFunc2).bind(_ref)`test${1}and${2}`;
+        _class_private_field_get(_this_getInstance = this.getInstance(), _fieldFunc2).bind(_this_getInstance)`test${1}and${2}`;
     }
     getInstance() {
         return new A();
diff --git a/crates/swc/tests/tsc-references/privateNameFieldUnaryMutation.1.normal.js b/crates/swc/tests/tsc-references/privateNameFieldUnaryMutation.1.normal.js
index d84dd548d1e4..c1c7406dd251 100644
--- a/crates/swc/tests/tsc-references/privateNameFieldUnaryMutation.1.normal.js
+++ b/crates/swc/tests/tsc-references/privateNameFieldUnaryMutation.1.normal.js
@@ -6,7 +6,7 @@ import _class_private_field_update from "@swc/helpers/src/_class_private_field_u
 var _test = /*#__PURE__*/ new WeakMap();
 class C {
     test() {
-        var _ref, _ref1, _ref2, _ref3;
+        var _this_getInstance, _this_getInstance1, _this_getInstance2, _this_getInstance3;
         _class_private_field_update(this.getInstance(), _test).value++;
         _class_private_field_update(this.getInstance(), _test).value--;
         ++_class_private_field_update(this.getInstance(), _test).value;
@@ -15,8 +15,8 @@ class C {
         const b = _class_private_field_update(this.getInstance(), _test).value--;
         const c = ++_class_private_field_update(this.getInstance(), _test).value;
         const d = --_class_private_field_update(this.getInstance(), _test).value;
-        for(_class_private_field_set(this.getInstance(), _test, 0); _class_private_field_get(_ref = this.getInstance(), _test) < 10; ++_class_private_field_update(this.getInstance(), _test).value){}
-        for(_class_private_field_set(this.getInstance(), _test, 0); _class_private_field_get(_ref1 = this.getInstance(), _test) < 10; _class_private_field_update(this.getInstance(), _test).value++){}
+        for(_class_private_field_set(this.getInstance(), _test, 0); _class_private_field_get(_this_getInstance = this.getInstance(), _test) < 10; ++_class_private_field_update(this.getInstance(), _test).value){}
+        for(_class_private_field_set(this.getInstance(), _test, 0); _class_private_field_get(_this_getInstance1 = this.getInstance(), _test) < 10; _class_private_field_update(this.getInstance(), _test).value++){}
         _class_private_field_update(this.getInstance(), _test).value++;
         _class_private_field_update(this.getInstance(), _test).value--;
         ++_class_private_field_update(this.getInstance(), _test).value;
@@ -25,8 +25,8 @@ class C {
         const f = _class_private_field_update(this.getInstance(), _test).value--;
         const g = ++_class_private_field_update(this.getInstance(), _test).value;
         const h = --_class_private_field_update(this.getInstance(), _test).value;
-        for(_class_private_field_set(this.getInstance(), _test, 0); _class_private_field_get(_ref2 = this.getInstance(), _test) < 10; ++_class_private_field_update(this.getInstance(), _test).value){}
-        for(_class_private_field_set(this.getInstance(), _test, 0); _class_private_field_get(_ref3 = this.getInstance(), _test) < 10; _class_private_field_update(this.getInstance(), _test).value++){}
+        for(_class_private_field_set(this.getInstance(), _test, 0); _class_private_field_get(_this_getInstance2 = this.getInstance(), _test) < 10; ++_class_private_field_update(this.getInstance(), _test).value){}
+        for(_class_private_field_set(this.getInstance(), _test, 0); _class_private_field_get(_this_getInstance3 = this.getInstance(), _test) < 10; _class_private_field_update(this.getInstance(), _test).value++){}
     }
     getInstance() {
         return new C();
diff --git a/crates/swc/tests/tsc-references/privateNameInLhsReceiverExpression.1.normal.js b/crates/swc/tests/tsc-references/privateNameInLhsReceiverExpression.1.normal.js
index e819902aa38a..d4c303dc932b 100644
--- a/crates/swc/tests/tsc-references/privateNameInLhsReceiverExpression.1.normal.js
+++ b/crates/swc/tests/tsc-references/privateNameInLhsReceiverExpression.1.normal.js
@@ -5,7 +5,7 @@ import _class_private_field_set from "@swc/helpers/src/_class_private_field_set.
 var _y = /*#__PURE__*/ new WeakMap();
 class Test {
     static something(obj) {
-        var _s;
+        var _obj__s;
         var _x, _x1;
         _class_private_field_set(obj[(new (_x = /*#__PURE__*/ new WeakMap(), class {
             constructor(){
@@ -16,7 +16,7 @@ class Test {
                 this.s = "prop";
             }
         })).s], _y, 1);
-        _class_private_field_set(_s = obj[(new (_x1 = /*#__PURE__*/ new WeakMap(), class {
+        _class_private_field_set(_obj__s = obj[(new (_x1 = /*#__PURE__*/ new WeakMap(), class {
             constructor(){
                 _class_private_field_init(this, _x1, {
                     writable: true,
@@ -24,7 +24,7 @@ class Test {
                 });
                 this.s = "prop";
             }
-        })).s], _y, _class_private_field_get(_s, _y) + 1);
+        })).s], _y, _class_private_field_get(_obj__s, _y) + 1);
     }
     constructor(){
         _class_private_field_init(this, _y, {
diff --git a/crates/swc/tests/tsc-references/privateNameMethodCallExpression.1.normal.js b/crates/swc/tests/tsc-references/privateNameMethodCallExpression.1.normal.js
index 06357ff2c65e..28238644cc89 100644
--- a/crates/swc/tests/tsc-references/privateNameMethodCallExpression.1.normal.js
+++ b/crates/swc/tests/tsc-references/privateNameMethodCallExpression.1.normal.js
@@ -4,7 +4,7 @@ import _class_private_method_init from "@swc/helpers/src/_class_private_method_i
 var _method = /*#__PURE__*/ new WeakSet(), _method2 = /*#__PURE__*/ new WeakSet();
 class AA {
     test() {
-        var _ref, _ref1, _ref2, _ref3;
+        var _this_getInstance, _this_getInstance1, _this_getInstance2, _this_getInstance3;
         _class_private_method_get(this, _method, method).call(this);
         const func = _class_private_method_get(this, _method, method);
         func();
@@ -16,10 +16,10 @@ class AA {
         _class_private_method_get(this, _method2, method2).call(this, 0, ...arr, 3);
         const b = new (_class_private_method_get(this, _method2, method2))(0, ...arr, 3); //Error 
         const str = _class_private_method_get(this, _method2, method2).bind(this)`head${1}middle${2}tail`;
-        _class_private_method_get(_ref = this.getInstance(), _method2, method2).bind(_ref)`test${1}and${2}`;
-        _class_private_method_get(_ref1 = this.getInstance(), _method2, method2).call(_ref1, 0, ...arr, 3);
-        const b2 = new (_class_private_method_get(_ref2 = this.getInstance(), _method2, method2))(0, ...arr, 3); //Error 
-        const str2 = _class_private_method_get(_ref3 = this.getInstance(), _method2, method2).bind(_ref3)`head${1}middle${2}tail`;
+        _class_private_method_get(_this_getInstance = this.getInstance(), _method2, method2).bind(_this_getInstance)`test${1}and${2}`;
+        _class_private_method_get(_this_getInstance1 = this.getInstance(), _method2, method2).call(_this_getInstance1, 0, ...arr, 3);
+        const b2 = new (_class_private_method_get(_this_getInstance2 = this.getInstance(), _method2, method2))(0, ...arr, 3); //Error 
+        const str2 = _class_private_method_get(_this_getInstance3 = this.getInstance(), _method2, method2).bind(_this_getInstance3)`head${1}middle${2}tail`;
     }
     getInstance() {
         return new AA();
diff --git a/crates/swc/tests/tsc-references/privateNameStaticFieldAssignment.1.normal.js b/crates/swc/tests/tsc-references/privateNameStaticFieldAssignment.1.normal.js
index cecccaeaa599..203abb8ab832 100644
--- a/crates/swc/tests/tsc-references/privateNameStaticFieldAssignment.1.normal.js
+++ b/crates/swc/tests/tsc-references/privateNameStaticFieldAssignment.1.normal.js
@@ -6,7 +6,7 @@ class A {
         return A;
     }
     constructor(){
-        var _A, _A1, _A2, _A3, _A4, _A5, _A6, _A7, _A8, _A9, _A10, _A11, _ref, _ref1, _ref2, _ref3, _ref4, _ref5, _ref6, _ref7, _ref8, _ref9, _ref10, _ref11;
+        var _A, _A1, _A2, _A3, _A4, _A5, _A6, _A7, _A8, _A9, _A10, _A11, _A_getClass, _A_getClass1, _A_getClass2, _A_getClass3, _A_getClass4, _A_getClass5, _A_getClass6, _A_getClass7, _A_getClass8, _A_getClass9, _A_getClass10, _A_getClass11;
         _class_static_private_field_spec_set(A, A, _field, 1);
         _class_static_private_field_spec_set(_A = A, A, _field, _class_static_private_field_spec_get(A, A, _field) + 2);
         _class_static_private_field_spec_set(_A1 = A, A, _field, _class_static_private_field_spec_get(A, A, _field) - 3);
@@ -21,18 +21,18 @@ class A {
         _class_static_private_field_spec_set(_A10 = A, A, _field, _class_static_private_field_spec_get(A, A, _field) | 12);
         _class_static_private_field_spec_set(_A11 = A, A, _field, _class_static_private_field_spec_get(A, A, _field) ^ 13);
         _class_static_private_field_spec_set(A.getClass(), A, _field, 1);
-        _class_static_private_field_spec_set(_ref = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) + 2);
-        _class_static_private_field_spec_set(_ref1 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) - 3);
-        _class_static_private_field_spec_set(_ref2 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) / 4);
-        _class_static_private_field_spec_set(_ref3 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) * 5);
-        _class_static_private_field_spec_set(_ref4 = A.getClass(), A, _field, Math.pow(_class_static_private_field_spec_get(A.getClass(), A, _field), 6));
-        _class_static_private_field_spec_set(_ref5 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) % 7);
-        _class_static_private_field_spec_set(_ref6 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) << 8);
-        _class_static_private_field_spec_set(_ref7 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) >> 9);
-        _class_static_private_field_spec_set(_ref8 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) >>> 10);
-        _class_static_private_field_spec_set(_ref9 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) & 11);
-        _class_static_private_field_spec_set(_ref10 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) | 12);
-        _class_static_private_field_spec_set(_ref11 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) ^ 13);
+        _class_static_private_field_spec_set(_A_getClass = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) + 2);
+        _class_static_private_field_spec_set(_A_getClass1 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) - 3);
+        _class_static_private_field_spec_set(_A_getClass2 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) / 4);
+        _class_static_private_field_spec_set(_A_getClass3 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) * 5);
+        _class_static_private_field_spec_set(_A_getClass4 = A.getClass(), A, _field, Math.pow(_class_static_private_field_spec_get(A.getClass(), A, _field), 6));
+        _class_static_private_field_spec_set(_A_getClass5 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) % 7);
+        _class_static_private_field_spec_set(_A_getClass6 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) << 8);
+        _class_static_private_field_spec_set(_A_getClass7 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) >> 9);
+        _class_static_private_field_spec_set(_A_getClass8 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) >>> 10);
+        _class_static_private_field_spec_set(_A_getClass9 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) & 11);
+        _class_static_private_field_spec_set(_A_getClass10 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) | 12);
+        _class_static_private_field_spec_set(_A_getClass11 = A.getClass(), A, _field, _class_static_private_field_spec_get(A.getClass(), A, _field) ^ 13);
     }
 }
 var _field = {
diff --git a/crates/swc/tests/tsc-references/privateNameStaticFieldCallExpression.1.normal.js b/crates/swc/tests/tsc-references/privateNameStaticFieldCallExpression.1.normal.js
index 1f7733afb555..8a8fc9e061cb 100644
--- a/crates/swc/tests/tsc-references/privateNameStaticFieldCallExpression.1.normal.js
+++ b/crates/swc/tests/tsc-references/privateNameStaticFieldCallExpression.1.normal.js
@@ -2,9 +2,9 @@
 import _class_static_private_field_spec_get from "@swc/helpers/src/_class_static_private_field_spec_get.mjs";
 class A {
     test() {
-        var ref;
+        var _class_static_private_field_spec_get1;
         _class_static_private_field_spec_get(A, A, _fieldFunc).call(A);
-        (ref = _class_static_private_field_spec_get(A, A, _fieldFunc)) === null || ref === void 0 ? void 0 : ref.call(A);
+        (_class_static_private_field_spec_get1 = _class_static_private_field_spec_get(A, A, _fieldFunc)) === null || _class_static_private_field_spec_get1 === void 0 ? void 0 : _class_static_private_field_spec_get1.call(A);
         const func = _class_static_private_field_spec_get(A, A, _fieldFunc);
         func();
         new (_class_static_private_field_spec_get(A, A, _fieldFunc))();
diff --git a/crates/swc/tests/tsc-references/privateProtectedMembersAreNotAccessibleDestructuring.1.normal.js b/crates/swc/tests/tsc-references/privateProtectedMembersAreNotAccessibleDestructuring.1.normal.js
index 85c7696e09e9..ef34bd7ada45 100644
--- a/crates/swc/tests/tsc-references/privateProtectedMembersAreNotAccessibleDestructuring.1.normal.js
+++ b/crates/swc/tests/tsc-references/privateProtectedMembersAreNotAccessibleDestructuring.1.normal.js
@@ -10,8 +10,8 @@ var K = /*#__PURE__*/ function() {
     var _proto = K.prototype;
     _proto.privateMethod = function privateMethod() {};
     _proto.m = function m() {
-        var ref = this, a = ref.priv, b = ref.prot; // ok
-        var ref1 = new K(), priv = ref1.priv, prot = ref1.prot; // ok
+        var _this = this, a = _this.priv, b = _this.prot; // ok
+        var _ref = new K(), priv = _ref.priv, prot = _ref.prot; // ok
     };
     return K;
 }();
@@ -25,8 +25,8 @@ var C = /*#__PURE__*/ function(K) {
     }
     var _proto = C.prototype;
     _proto.m2 = function m2() {
-        var ref = this, a = ref.priv; // error
-        var ref1 = this, b = ref1.prot; // ok
+        var _this = this, a = _this.priv; // error
+        var _this1 = this, b = _this1.prot; // ok
     };
     return C;
 }(K);
diff --git a/crates/swc/tests/tsc-references/privateProtectedMembersAreNotAccessibleDestructuring.2.minified.js b/crates/swc/tests/tsc-references/privateProtectedMembersAreNotAccessibleDestructuring.2.minified.js
index 59b6a99835b7..e84bd6052695 100644
--- a/crates/swc/tests/tsc-references/privateProtectedMembersAreNotAccessibleDestructuring.2.minified.js
+++ b/crates/swc/tests/tsc-references/privateProtectedMembersAreNotAccessibleDestructuring.2.minified.js
@@ -10,8 +10,8 @@ var k = new (function() {
     var _proto = K.prototype;
     return _proto.privateMethod = function() {}, _proto.m = function() {
         this.priv, this.prot;
-        var ref = new K();
-        ref.priv, ref.prot;
+        var _ref = new K();
+        _ref.priv, _ref.prot;
     }, K;
 }())();
 k.priv, k.prot, k.privateMethod, k.priv, k.prot, k.privateMethod;
diff --git a/crates/swc/tests/tsc-references/propertyAccessChain.1.normal.js b/crates/swc/tests/tsc-references/propertyAccessChain.1.normal.js
index c66428d15709..f9857c3db764 100644
--- a/crates/swc/tests/tsc-references/propertyAccessChain.1.normal.js
+++ b/crates/swc/tests/tsc-references/propertyAccessChain.1.normal.js
@@ -1,11 +1,11 @@
 //// [propertyAccessChain.ts]
-var ref, ref1, ref2, ref3, ref4, ref5;
+var _o3_b, _o4_b, _ref, _o5_b, _ref1, _o6;
 o1 === null || o1 === void 0 ? void 0 : o1.b;
 o2 === null || o2 === void 0 ? void 0 : o2.b.c;
-(ref = o3.b) === null || ref === void 0 ? void 0 : ref.c;
-(ref2 = (ref1 = o4.b) === null || ref1 === void 0 ? void 0 : ref1.c.d) === null || ref2 === void 0 ? void 0 : ref2.e;
-(ref4 = (ref3 = o5.b) === null || ref3 === void 0 ? void 0 : ref3.call(o5).c.d) === null || ref4 === void 0 ? void 0 : ref4.e;
-(ref5 = o6()) === null || ref5 === void 0 ? void 0 : ref5.x;
+(_o3_b = o3.b) === null || _o3_b === void 0 ? void 0 : _o3_b.c;
+(_ref = (_o4_b = o4.b) === null || _o4_b === void 0 ? void 0 : _o4_b.c.d) === null || _ref === void 0 ? void 0 : _ref.e;
+(_ref1 = (_o5_b = o5.b) === null || _o5_b === void 0 ? void 0 : _o5_b.call(o5).c.d) === null || _ref1 === void 0 ? void 0 : _ref1.e;
+(_o6 = o6()) === null || _o6 === void 0 ? void 0 : _o6.x;
 // GH#34109
 (o1 === null || o1 === void 0 ? void 0 : o1.b) ? 1 : 0;
 // GH#36031
diff --git a/crates/swc/tests/tsc-references/propertyAccessChain.2.1.normal.js b/crates/swc/tests/tsc-references/propertyAccessChain.2.1.normal.js
index 3083849c2845..73b3b4f0d6c8 100644
--- a/crates/swc/tests/tsc-references/propertyAccessChain.2.1.normal.js
+++ b/crates/swc/tests/tsc-references/propertyAccessChain.2.1.normal.js
@@ -1,5 +1,5 @@
 //// [propertyAccessChain.2.ts]
-var ref;
+var _o3_b;
 o1 === null || o1 === void 0 ? void 0 : o1.b;
 o2 === null || o2 === void 0 ? void 0 : o2.b.c;
-(ref = o3.b) === null || ref === void 0 ? void 0 : ref.c;
+(_o3_b = o3.b) === null || _o3_b === void 0 ? void 0 : _o3_b.c;
diff --git a/crates/swc/tests/tsc-references/propertyAccessChain.2.2.minified.js b/crates/swc/tests/tsc-references/propertyAccessChain.2.2.minified.js
index 9a534c3ad8ad..6944a9005a11 100644
--- a/crates/swc/tests/tsc-references/propertyAccessChain.2.2.minified.js
+++ b/crates/swc/tests/tsc-references/propertyAccessChain.2.2.minified.js
@@ -1,3 +1,3 @@
 //// [propertyAccessChain.2.ts]
-var ref;
-null == o1 || o1.b, null == o2 || o2.b.c, null === (ref = o3.b) || void 0 === ref || ref.c;
+var _o3_b;
+null == o1 || o1.b, null == o2 || o2.b.c, null === (_o3_b = o3.b) || void 0 === _o3_b || _o3_b.c;
diff --git a/crates/swc/tests/tsc-references/propertyAccessChain.2.minified.js b/crates/swc/tests/tsc-references/propertyAccessChain.2.minified.js
index 2119a6f5fa00..e750bda9691b 100644
--- a/crates/swc/tests/tsc-references/propertyAccessChain.2.minified.js
+++ b/crates/swc/tests/tsc-references/propertyAccessChain.2.minified.js
@@ -1,3 +1,3 @@
 //// [propertyAccessChain.ts]
-var ref, ref1, ref2, ref3, ref4, ref5;
-null == o1 || o1.b, null == o2 || o2.b.c, null === (ref = o3.b) || void 0 === ref || ref.c, null === (ref2 = null === (ref1 = o4.b) || void 0 === ref1 ? void 0 : ref1.c.d) || void 0 === ref2 || ref2.e, null === (ref4 = null === (ref3 = o5.b) || void 0 === ref3 ? void 0 : ref3.call(o5).c.d) || void 0 === ref4 || ref4.e, null === (ref5 = o6()) || void 0 === ref5 || ref5.x, null == o1 || o1.b, null == o2 || o2.b.c, null == o2 || o2.b.c;
+var _o3_b, _o4_b, _ref, _o5_b, _ref1, _o6;
+null == o1 || o1.b, null == o2 || o2.b.c, null === (_o3_b = o3.b) || void 0 === _o3_b || _o3_b.c, null === (_ref = null === (_o4_b = o4.b) || void 0 === _o4_b ? void 0 : _o4_b.c.d) || void 0 === _ref || _ref.e, null === (_ref1 = null === (_o5_b = o5.b) || void 0 === _o5_b ? void 0 : _o5_b.call(o5).c.d) || void 0 === _ref1 || _ref1.e, null === (_o6 = o6()) || void 0 === _o6 || _o6.x, null == o1 || o1.b, null == o2 || o2.b.c, null == o2 || o2.b.c;
diff --git a/crates/swc/tests/tsc-references/reexportClassDefinition.1.normal.js b/crates/swc/tests/tsc-references/reexportClassDefinition.1.normal.js
index d478c07df96b..b9ee51ed89c9 100644
--- a/crates/swc/tests/tsc-references/reexportClassDefinition.1.normal.js
+++ b/crates/swc/tests/tsc-references/reexportClassDefinition.1.normal.js
@@ -21,9 +21,9 @@ var _classCallCheck = require("@swc/helpers/lib/_class_call_check.js").default;
 var _inherits = require("@swc/helpers/lib/_inherits.js").default;
 var _createSuper = require("@swc/helpers/lib/_create_super.js").default;
 var foo2 = require("./foo2");
-var x = /*#__PURE__*/ function(_x) {
+var x = /*#__PURE__*/ function(_foo2_x) {
     "use strict";
-    _inherits(x, _x);
+    _inherits(x, _foo2_x);
     var _super = _createSuper(x);
     function x() {
         _classCallCheck(this, x);
diff --git a/crates/swc/tests/tsc-references/restElementWithBindingPattern2.1.normal.js b/crates/swc/tests/tsc-references/restElementWithBindingPattern2.1.normal.js
index e2e44adeaf83..8b0ac919dff2 100644
--- a/crates/swc/tests/tsc-references/restElementWithBindingPattern2.1.normal.js
+++ b/crates/swc/tests/tsc-references/restElementWithBindingPattern2.1.normal.js
@@ -1,5 +1,5 @@
 //// [restElementWithBindingPattern2.ts]
-var ref = [
+var _ref = [
     0,
     1
-], a = ref[0], b = ref.b;
+], a = _ref[0], b = _ref.b;
diff --git a/crates/swc/tests/tsc-references/restElementWithNullInitializer.1.normal.js b/crates/swc/tests/tsc-references/restElementWithNullInitializer.1.normal.js
index f6ad41730164..eb19c6ccc1a1 100644
--- a/crates/swc/tests/tsc-references/restElementWithNullInitializer.1.normal.js
+++ b/crates/swc/tests/tsc-references/restElementWithNullInitializer.1.normal.js
@@ -1,14 +1,14 @@
 //// [restElementWithNullInitializer.ts]
 import _to_array from "@swc/helpers/src/_to_array.mjs";
 function foo1() {
-    var ref = _to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : null), r = ref.slice(0);
+    var _ref = _to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : null), r = _ref.slice(0);
 }
 function foo2() {
-    var ref = _to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : undefined), r = ref.slice(0);
+    var _ref = _to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : undefined), r = _ref.slice(0);
 }
 function foo3() {
-    var ref = _to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {}), r = ref.slice(0);
+    var _ref = _to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : {}), r = _ref.slice(0);
 }
 function foo4() {
-    var ref = _to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : []), r = ref.slice(0);
+    var _ref = _to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : []), r = _ref.slice(0);
 }
diff --git a/crates/swc/tests/tsc-references/spreadContextualTypedBindingPattern.1.normal.js b/crates/swc/tests/tsc-references/spreadContextualTypedBindingPattern.1.normal.js
index 37d53a6bc99f..d1d9a8442e72 100644
--- a/crates/swc/tests/tsc-references/spreadContextualTypedBindingPattern.1.normal.js
+++ b/crates/swc/tests/tsc-references/spreadContextualTypedBindingPattern.1.normal.js
@@ -2,4 +2,4 @@
 // #18308
 import _object_spread from "@swc/helpers/src/_object_spread.mjs";
 // [ts] Initializer provides no value for this binding element and the binding element has no default value.
-var ref = _object_spread({}, bob, alice), naam = ref.naam, age = ref.age;
+var _$_object_spread = _object_spread({}, bob, alice), naam = _$_object_spread.naam, age = _$_object_spread.age;
diff --git a/crates/swc/tests/tsc-references/spreadContextualTypedBindingPattern.2.minified.js b/crates/swc/tests/tsc-references/spreadContextualTypedBindingPattern.2.minified.js
index 1388553f83a7..99691b00686f 100644
--- a/crates/swc/tests/tsc-references/spreadContextualTypedBindingPattern.2.minified.js
+++ b/crates/swc/tests/tsc-references/spreadContextualTypedBindingPattern.2.minified.js
@@ -1,4 +1,4 @@
 //// [spreadContextualTypedBindingPattern.ts]
 import _object_spread from "@swc/helpers/src/_object_spread.mjs";
-var ref = _object_spread({}, bob, alice);
-ref.naam, ref.age;
+var _$_object_spread = _object_spread({}, bob, alice);
+_$_object_spread.naam, _$_object_spread.age;
diff --git a/crates/swc/tests/tsc-references/superMethodCall.1.normal.js b/crates/swc/tests/tsc-references/superMethodCall.1.normal.js
index 557bd238497f..12b42d6985ec 100644
--- a/crates/swc/tests/tsc-references/superMethodCall.1.normal.js
+++ b/crates/swc/tests/tsc-references/superMethodCall.1.normal.js
@@ -5,14 +5,14 @@ class Base {
 }
 class Derived extends Base {
     method() {
-        var ref;
-        return (ref = super.method) === null || ref === void 0 ? void 0 : ref.call(this);
+        var _super_method;
+        return (_super_method = super.method) === null || _super_method === void 0 ? void 0 : _super_method.call(this);
     }
     asyncMethod() {
         var _this = this, _superprop_get_method = ()=>super.method;
         return _async_to_generator(function*() {
-            var ref;
-            return (ref = _superprop_get_method()) === null || ref === void 0 ? void 0 : ref.call(_this);
+            var _super_method;
+            return (_super_method = _superprop_get_method()) === null || _super_method === void 0 ? void 0 : _super_method.call(_this);
         })();
     }
 }
diff --git a/crates/swc/tests/tsc-references/symbolDeclarationEmit11.1.normal.js b/crates/swc/tests/tsc-references/symbolDeclarationEmit11.1.normal.js
index 830125bb5b7e..773161b8694c 100644
--- a/crates/swc/tests/tsc-references/symbolDeclarationEmit11.1.normal.js
+++ b/crates/swc/tests/tsc-references/symbolDeclarationEmit11.1.normal.js
@@ -1,10 +1,10 @@
 //// [symbolDeclarationEmit11.ts]
-let _iterator = Symbol.iterator, _isConcatSpreadable = Symbol.isConcatSpreadable, _toPrimitive = Symbol.toPrimitive, _toPrimitive1 = Symbol.toPrimitive;
+let _Symbol_iterator = Symbol.iterator, _Symbol_isConcatSpreadable = Symbol.isConcatSpreadable, _Symbol_toPrimitive = Symbol.toPrimitive, _Symbol_toPrimitive1 = Symbol.toPrimitive;
 class C {
-    static [_isConcatSpreadable]() {}
-    static get [_toPrimitive]() {
+    static [_Symbol_isConcatSpreadable]() {}
+    static get [_Symbol_toPrimitive]() {
         return "";
     }
-    static set [_toPrimitive1](x) {}
+    static set [_Symbol_toPrimitive1](x) {}
 }
-C[_iterator] = 0;
+C[_Symbol_iterator] = 0;
diff --git a/crates/swc/tests/tsc-references/symbolDeclarationEmit11.2.minified.js b/crates/swc/tests/tsc-references/symbolDeclarationEmit11.2.minified.js
index 6e01549ae482..9634df757f70 100644
--- a/crates/swc/tests/tsc-references/symbolDeclarationEmit11.2.minified.js
+++ b/crates/swc/tests/tsc-references/symbolDeclarationEmit11.2.minified.js
@@ -1,9 +1,9 @@
 //// [symbolDeclarationEmit11.ts]
-let _isConcatSpreadable = Symbol.isConcatSpreadable, _toPrimitive = Symbol.toPrimitive, _toPrimitive1 = Symbol.toPrimitive;
+let _Symbol_isConcatSpreadable = Symbol.isConcatSpreadable, _Symbol_toPrimitive = Symbol.toPrimitive, _Symbol_toPrimitive1 = Symbol.toPrimitive;
 (class {
-    static [_isConcatSpreadable]() {}
-    static get [_toPrimitive]() {
+    static [_Symbol_isConcatSpreadable]() {}
+    static get [_Symbol_toPrimitive]() {
         return "";
     }
-    static set [_toPrimitive1](x) {}
+    static set [_Symbol_toPrimitive1](x) {}
 })[Symbol.iterator] = 0;
diff --git a/crates/swc/tests/tsc-references/symbolDeclarationEmit2.1.normal.js b/crates/swc/tests/tsc-references/symbolDeclarationEmit2.1.normal.js
index 027fc7a1ee7b..cb90bdd5f275 100644
--- a/crates/swc/tests/tsc-references/symbolDeclarationEmit2.1.normal.js
+++ b/crates/swc/tests/tsc-references/symbolDeclarationEmit2.1.normal.js
@@ -1,7 +1,7 @@
 //// [symbolDeclarationEmit2.ts]
-let _toPrimitive = Symbol.toPrimitive;
+let _Symbol_toPrimitive = Symbol.toPrimitive;
 class C {
     constructor(){
-        this[_toPrimitive] = "";
+        this[_Symbol_toPrimitive] = "";
     }
 }
diff --git a/crates/swc/tests/tsc-references/symbolProperty6.1.normal.js b/crates/swc/tests/tsc-references/symbolProperty6.1.normal.js
index 1cfc4ae289cf..0186122674a9 100644
--- a/crates/swc/tests/tsc-references/symbolProperty6.1.normal.js
+++ b/crates/swc/tests/tsc-references/symbolProperty6.1.normal.js
@@ -1,11 +1,11 @@
 //// [symbolProperty6.ts]
-let _iterator = Symbol.iterator, _toPrimitive = Symbol.toPrimitive, _toStringTag = Symbol.toStringTag;
+let _Symbol_iterator = Symbol.iterator, _Symbol_toPrimitive = Symbol.toPrimitive, _Symbol_toStringTag = Symbol.toStringTag;
 class C {
-    [_toPrimitive]() {}
-    get [_toStringTag]() {
+    [_Symbol_toPrimitive]() {}
+    get [_Symbol_toStringTag]() {
         return 0;
     }
     constructor(){
-        this[_iterator] = 0;
+        this[_Symbol_iterator] = 0;
     }
 }
diff --git a/crates/swc/tests/tsc-references/symbolProperty7.1.normal.js b/crates/swc/tests/tsc-references/symbolProperty7.1.normal.js
index a321469a0f3f..c34a947d7a1f 100644
--- a/crates/swc/tests/tsc-references/symbolProperty7.1.normal.js
+++ b/crates/swc/tests/tsc-references/symbolProperty7.1.normal.js
@@ -1,11 +1,11 @@
 //// [symbolProperty7.ts]
-let _ref = Symbol(), tmp = Symbol(), tmp1 = Symbol();
+let _Symbol = Symbol(), _Symbol1 = Symbol(), _Symbol2 = Symbol();
 class C {
-    [tmp]() {}
-    get [tmp1]() {
+    [_Symbol1]() {}
+    get [_Symbol2]() {
         return 0;
     }
     constructor(){
-        this[_ref] = 0;
+        this[_Symbol] = 0;
     }
 }
diff --git a/crates/swc/tests/tsc-references/thisInInvalidContexts.1.normal.js b/crates/swc/tests/tsc-references/thisInInvalidContexts.1.normal.js
index 74dc650f9d84..4fda5c39bd35 100644
--- a/crates/swc/tests/tsc-references/thisInInvalidContexts.1.normal.js
+++ b/crates/swc/tests/tsc-references/thisInInvalidContexts.1.normal.js
@@ -42,9 +42,9 @@ var M;
 //'this' as a type argument
 function genericFunc(x) {}
 genericFunc(undefined); // Should be an error
-var ErrClass3 = /*#__PURE__*/ function(_superClass) {
+var ErrClass3 = /*#__PURE__*/ function(_this) {
     "use strict";
-    _inherits(ErrClass3, _superClass);
+    _inherits(ErrClass3, _this);
     var _super = _create_super(ErrClass3);
     function ErrClass3() {
         _class_call_check(this, ErrClass3);
diff --git a/crates/swc/tests/tsc-references/thisMethodCall.1.normal.js b/crates/swc/tests/tsc-references/thisMethodCall.1.normal.js
index da83b8637703..417ebe61c5c0 100644
--- a/crates/swc/tests/tsc-references/thisMethodCall.1.normal.js
+++ b/crates/swc/tests/tsc-references/thisMethodCall.1.normal.js
@@ -2,7 +2,7 @@
 class C {
     method() {}
     other() {
-        var _obj, ref;
-        (ref = (_obj = this).method) === null || ref === void 0 ? void 0 : ref.call(_obj);
+        var _this, _this_method;
+        (_this_method = (_this = this).method) === null || _this_method === void 0 ? void 0 : _this_method.call(_this);
     }
 }
diff --git a/crates/swc/tests/tsc-references/tsxCorrectlyParseLessThanComparison1.1.normal.js b/crates/swc/tests/tsc-references/tsxCorrectlyParseLessThanComparison1.1.normal.js
index 4b0b38a088cd..9b3b55826bec 100644
--- a/crates/swc/tests/tsc-references/tsxCorrectlyParseLessThanComparison1.1.normal.js
+++ b/crates/swc/tests/tsc-references/tsxCorrectlyParseLessThanComparison1.1.normal.js
@@ -2,9 +2,9 @@
 import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
-export var ShortDetails = /*#__PURE__*/ function(_Component) {
+export var ShortDetails = /*#__PURE__*/ function(_React_Component) {
     "use strict";
-    _inherits(ShortDetails, _Component);
+    _inherits(ShortDetails, _React_Component);
     var _super = _create_super(ShortDetails);
     function ShortDetails() {
         _class_call_check(this, ShortDetails);
diff --git a/crates/swc/tests/tsc-references/tsxCorrectlyParseLessThanComparison1.2.minified.js b/crates/swc/tests/tsc-references/tsxCorrectlyParseLessThanComparison1.2.minified.js
index 99501429d865..a856cc11f5be 100644
--- a/crates/swc/tests/tsc-references/tsxCorrectlyParseLessThanComparison1.2.minified.js
+++ b/crates/swc/tests/tsc-references/tsxCorrectlyParseLessThanComparison1.2.minified.js
@@ -2,9 +2,9 @@
 import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
-export var ShortDetails = function(_Component) {
+export var ShortDetails = function(_React_Component) {
     "use strict";
-    _inherits(ShortDetails, _Component);
+    _inherits(ShortDetails, _React_Component);
     var _super = _create_super(ShortDetails);
     function ShortDetails() {
         return _class_call_check(this, ShortDetails), _super.apply(this, arguments);
diff --git a/crates/swc/tests/tsc-references/tsxDynamicTagName5.1.normal.js b/crates/swc/tests/tsc-references/tsxDynamicTagName5.1.normal.js
index c9fb7bc3d7a3..2213d6d8b560 100644
--- a/crates/swc/tests/tsc-references/tsxDynamicTagName5.1.normal.js
+++ b/crates/swc/tests/tsc-references/tsxDynamicTagName5.1.normal.js
@@ -5,9 +5,9 @@ import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
 import * as React from "react";
-export var Text = /*#__PURE__*/ function(_Component) {
+export var Text = /*#__PURE__*/ function(_React_Component) {
     "use strict";
-    _inherits(Text, _Component);
+    _inherits(Text, _React_Component);
     var _super = _create_super(Text);
     function Text() {
         _class_call_check(this, Text);
diff --git a/crates/swc/tests/tsc-references/tsxDynamicTagName5.2.minified.js b/crates/swc/tests/tsc-references/tsxDynamicTagName5.2.minified.js
index 46fb543bace1..942a703659b7 100644
--- a/crates/swc/tests/tsc-references/tsxDynamicTagName5.2.minified.js
+++ b/crates/swc/tests/tsc-references/tsxDynamicTagName5.2.minified.js
@@ -5,9 +5,9 @@ import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
 import * as React from "react";
-export var Text = function(_Component) {
+export var Text = function(_React_Component) {
     "use strict";
-    _inherits(Text, _Component);
+    _inherits(Text, _React_Component);
     var _super = _create_super(Text);
     function Text() {
         var _this;
diff --git a/crates/swc/tests/tsc-references/tsxDynamicTagName7.1.normal.js b/crates/swc/tests/tsc-references/tsxDynamicTagName7.1.normal.js
index 33f67dcf782d..689a0133399c 100644
--- a/crates/swc/tests/tsc-references/tsxDynamicTagName7.1.normal.js
+++ b/crates/swc/tests/tsc-references/tsxDynamicTagName7.1.normal.js
@@ -5,9 +5,9 @@ import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
 import * as React from "react";
-export var Text = /*#__PURE__*/ function(_Component) {
+export var Text = /*#__PURE__*/ function(_React_Component) {
     "use strict";
-    _inherits(Text, _Component);
+    _inherits(Text, _React_Component);
     var _super = _create_super(Text);
     function Text() {
         _class_call_check(this, Text);
diff --git a/crates/swc/tests/tsc-references/tsxDynamicTagName7.2.minified.js b/crates/swc/tests/tsc-references/tsxDynamicTagName7.2.minified.js
index 7376447b8497..9f548ca2b234 100644
--- a/crates/swc/tests/tsc-references/tsxDynamicTagName7.2.minified.js
+++ b/crates/swc/tests/tsc-references/tsxDynamicTagName7.2.minified.js
@@ -5,9 +5,9 @@ import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
 import * as React from "react";
-export var Text = function(_Component) {
+export var Text = function(_React_Component) {
     "use strict";
-    _inherits(Text, _Component);
+    _inherits(Text, _React_Component);
     var _super = _create_super(Text);
     function Text() {
         var _this;
diff --git a/crates/swc/tests/tsc-references/tsxDynamicTagName8.1.normal.js b/crates/swc/tests/tsc-references/tsxDynamicTagName8.1.normal.js
index 11eae177f0be..ff8c688bbb4b 100644
--- a/crates/swc/tests/tsc-references/tsxDynamicTagName8.1.normal.js
+++ b/crates/swc/tests/tsc-references/tsxDynamicTagName8.1.normal.js
@@ -5,9 +5,9 @@ import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
 import * as React from "react";
-export var Text = /*#__PURE__*/ function(_Component) {
+export var Text = /*#__PURE__*/ function(_React_Component) {
     "use strict";
-    _inherits(Text, _Component);
+    _inherits(Text, _React_Component);
     var _super = _create_super(Text);
     function Text() {
         _class_call_check(this, Text);
diff --git a/crates/swc/tests/tsc-references/tsxDynamicTagName8.2.minified.js b/crates/swc/tests/tsc-references/tsxDynamicTagName8.2.minified.js
index df39148869a0..e7e1db40fd84 100644
--- a/crates/swc/tests/tsc-references/tsxDynamicTagName8.2.minified.js
+++ b/crates/swc/tests/tsc-references/tsxDynamicTagName8.2.minified.js
@@ -5,9 +5,9 @@ import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
 import * as React from "react";
-export var Text = function(_Component) {
+export var Text = function(_React_Component) {
     "use strict";
-    _inherits(Text, _Component);
+    _inherits(Text, _React_Component);
     var _super = _create_super(Text);
     function Text() {
         var _this;
diff --git a/crates/swc/tests/tsc-references/tsxDynamicTagName9.1.normal.js b/crates/swc/tests/tsc-references/tsxDynamicTagName9.1.normal.js
index 18ed573a23fc..2234af34e743 100644
--- a/crates/swc/tests/tsc-references/tsxDynamicTagName9.1.normal.js
+++ b/crates/swc/tests/tsc-references/tsxDynamicTagName9.1.normal.js
@@ -5,9 +5,9 @@ import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
 import * as React from "react";
-export var Text = /*#__PURE__*/ function(_Component) {
+export var Text = /*#__PURE__*/ function(_React_Component) {
     "use strict";
-    _inherits(Text, _Component);
+    _inherits(Text, _React_Component);
     var _super = _create_super(Text);
     function Text() {
         _class_call_check(this, Text);
diff --git a/crates/swc/tests/tsc-references/tsxDynamicTagName9.2.minified.js b/crates/swc/tests/tsc-references/tsxDynamicTagName9.2.minified.js
index 566aca0f7d6a..3e803431a513 100644
--- a/crates/swc/tests/tsc-references/tsxDynamicTagName9.2.minified.js
+++ b/crates/swc/tests/tsc-references/tsxDynamicTagName9.2.minified.js
@@ -5,9 +5,9 @@ import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
 import * as React from "react";
-export var Text = function(_Component) {
+export var Text = function(_React_Component) {
     "use strict";
-    _inherits(Text, _Component);
+    _inherits(Text, _React_Component);
     var _super = _create_super(Text);
     function Text() {
         var _this;
diff --git a/crates/swc/tests/tsc-references/tsxExternalModuleEmit1.1.normal.js b/crates/swc/tests/tsc-references/tsxExternalModuleEmit1.1.normal.js
index 9a959b32753a..5e2c94d7042c 100644
--- a/crates/swc/tests/tsc-references/tsxExternalModuleEmit1.1.normal.js
+++ b/crates/swc/tests/tsc-references/tsxExternalModuleEmit1.1.normal.js
@@ -19,9 +19,9 @@ var _interopRequireWildcard = require("@swc/helpers/lib/_interop_require_wildcar
 var _createSuper = require("@swc/helpers/lib/_create_super.js").default;
 var _react = /*#__PURE__*/ _interopRequireWildcard(require("react"));
 var _button = require("./button");
-var App = /*#__PURE__*/ function(_Component) {
+var App = /*#__PURE__*/ function(_React_Component) {
     "use strict";
-    _inherits(App, _Component);
+    _inherits(App, _React_Component);
     var _super = _createSuper(App);
     function App() {
         _classCallCheck(this, App);
@@ -49,9 +49,9 @@ var _inherits = require("@swc/helpers/lib/_inherits.js").default;
 var _interopRequireWildcard = require("@swc/helpers/lib/_interop_require_wildcard.js").default;
 var _createSuper = require("@swc/helpers/lib/_create_super.js").default;
 var _react = /*#__PURE__*/ _interopRequireWildcard(require("react"));
-var Button = /*#__PURE__*/ function(_Component) {
+var Button = /*#__PURE__*/ function(_React_Component) {
     "use strict";
-    _inherits(Button, _Component);
+    _inherits(Button, _React_Component);
     var _super = _createSuper(Button);
     function Button() {
         _classCallCheck(this, Button);
diff --git a/crates/swc/tests/tsc-references/tsxExternalModuleEmit1.2.minified.js b/crates/swc/tests/tsc-references/tsxExternalModuleEmit1.2.minified.js
index eb0eb7b3e281..c1949382ad48 100644
--- a/crates/swc/tests/tsc-references/tsxExternalModuleEmit1.2.minified.js
+++ b/crates/swc/tests/tsc-references/tsxExternalModuleEmit1.2.minified.js
@@ -12,9 +12,9 @@ Object.defineProperty(exports, "__esModule", {
         return App;
     }
 });
-var _classCallCheck = require("@swc/helpers/lib/_class_call_check.js").default, _inherits = require("@swc/helpers/lib/_inherits.js").default, _interopRequireWildcard = require("@swc/helpers/lib/_interop_require_wildcard.js").default, _createSuper = require("@swc/helpers/lib/_create_super.js").default, _react = _interopRequireWildcard(require("react")), _button = require("./button"), App = function(_Component) {
+var _classCallCheck = require("@swc/helpers/lib/_class_call_check.js").default, _inherits = require("@swc/helpers/lib/_inherits.js").default, _interopRequireWildcard = require("@swc/helpers/lib/_interop_require_wildcard.js").default, _createSuper = require("@swc/helpers/lib/_create_super.js").default, _react = _interopRequireWildcard(require("react")), _button = require("./button"), App = function(_React_Component) {
     "use strict";
-    _inherits(App, _Component);
+    _inherits(App, _React_Component);
     var _super = _createSuper(App);
     function App() {
         return _classCallCheck(this, App), _super.apply(this, arguments);
@@ -33,9 +33,9 @@ Object.defineProperty(exports, "__esModule", {
         return Button;
     }
 });
-var _classCallCheck = require("@swc/helpers/lib/_class_call_check.js").default, _inherits = require("@swc/helpers/lib/_inherits.js").default, _interopRequireWildcard = require("@swc/helpers/lib/_interop_require_wildcard.js").default, _createSuper = require("@swc/helpers/lib/_create_super.js").default, _react = _interopRequireWildcard(require("react")), Button = function(_Component) {
+var _classCallCheck = require("@swc/helpers/lib/_class_call_check.js").default, _inherits = require("@swc/helpers/lib/_inherits.js").default, _interopRequireWildcard = require("@swc/helpers/lib/_interop_require_wildcard.js").default, _createSuper = require("@swc/helpers/lib/_create_super.js").default, _react = _interopRequireWildcard(require("react")), Button = function(_React_Component) {
     "use strict";
-    _inherits(Button, _Component);
+    _inherits(Button, _React_Component);
     var _super = _createSuper(Button);
     function Button() {
         return _classCallCheck(this, Button), _super.apply(this, arguments);
diff --git a/crates/swc/tests/tsc-references/tsxSpreadAttributesResolution17.1.normal.js b/crates/swc/tests/tsc-references/tsxSpreadAttributesResolution17.1.normal.js
index bead0839e350..98f01de2c961 100644
--- a/crates/swc/tests/tsc-references/tsxSpreadAttributesResolution17.1.normal.js
+++ b/crates/swc/tests/tsc-references/tsxSpreadAttributesResolution17.1.normal.js
@@ -3,9 +3,9 @@ import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _extends from "@swc/helpers/src/_extends.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
-export var Empty = /*#__PURE__*/ function(_Component) {
+export var Empty = /*#__PURE__*/ function(_React_Component) {
     "use strict";
-    _inherits(Empty, _Component);
+    _inherits(Empty, _React_Component);
     var _super = _create_super(Empty);
     function Empty() {
         _class_call_check(this, Empty);
diff --git a/crates/swc/tests/tsc-references/tsxSpreadAttributesResolution17.2.minified.js b/crates/swc/tests/tsc-references/tsxSpreadAttributesResolution17.2.minified.js
index ed4696e0a66b..654d45b8da73 100644
--- a/crates/swc/tests/tsc-references/tsxSpreadAttributesResolution17.2.minified.js
+++ b/crates/swc/tests/tsc-references/tsxSpreadAttributesResolution17.2.minified.js
@@ -3,9 +3,9 @@ import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _extends from "@swc/helpers/src/_extends.mjs";
 import _inherits from "@swc/helpers/src/_inherits.mjs";
 import _create_super from "@swc/helpers/src/_create_super.mjs";
-export var Empty = function(_Component) {
+export var Empty = function(_React_Component) {
     "use strict";
-    _inherits(Empty, _Component);
+    _inherits(Empty, _React_Component);
     var _super = _create_super(Empty);
     function Empty() {
         return _class_call_check(this, Empty), _super.apply(this, arguments);
diff --git a/crates/swc/tests/tsc-references/tupleElementTypes1.1.normal.js b/crates/swc/tests/tsc-references/tupleElementTypes1.1.normal.js
index 8c81921d853b..303b0d6bc511 100644
--- a/crates/swc/tests/tsc-references/tupleElementTypes1.1.normal.js
+++ b/crates/swc/tests/tsc-references/tupleElementTypes1.1.normal.js
@@ -1,5 +1,5 @@
 //// [tupleElementTypes1.ts]
-var ref = [
+var _ref = [
     undefined,
     undefined
-], a = ref[0], b = ref[1];
+], a = _ref[0], b = _ref[1];
diff --git a/crates/swc/tests/tsc-references/tupleElementTypes1.2.minified.js b/crates/swc/tests/tsc-references/tupleElementTypes1.2.minified.js
index c4328523b418..4cba57762ede 100644
--- a/crates/swc/tests/tsc-references/tupleElementTypes1.2.minified.js
+++ b/crates/swc/tests/tsc-references/tupleElementTypes1.2.minified.js
@@ -1,6 +1,6 @@
 //// [tupleElementTypes1.ts]
-var ref = [
+var _ref = [
     void 0,
     void 0
 ];
-ref[0], ref[1];
+_ref[0], _ref[1];
diff --git a/crates/swc/tests/tsc-references/tupleElementTypes3.1.normal.js b/crates/swc/tests/tsc-references/tupleElementTypes3.1.normal.js
index 11509780ac97..31bfe42ad7ac 100644
--- a/crates/swc/tests/tsc-references/tupleElementTypes3.1.normal.js
+++ b/crates/swc/tests/tsc-references/tupleElementTypes3.1.normal.js
@@ -1,5 +1,5 @@
 //// [tupleElementTypes3.ts]
-var ref = [
+var _ref = [
     0,
     undefined
-], a = ref[0], b = ref[1];
+], a = _ref[0], b = _ref[1];
diff --git a/crates/swc/tests/tsc-references/tupleElementTypes3.2.minified.js b/crates/swc/tests/tsc-references/tupleElementTypes3.2.minified.js
index a06a81789c65..64a28e1a023d 100644
--- a/crates/swc/tests/tsc-references/tupleElementTypes3.2.minified.js
+++ b/crates/swc/tests/tsc-references/tupleElementTypes3.2.minified.js
@@ -1,6 +1,6 @@
 //// [tupleElementTypes3.ts]
-var ref = [
+var _ref = [
     0,
     void 0
 ];
-ref[0], ref[1];
+_ref[0], _ref[1];
diff --git a/crates/swc/tests/tsc-references/tupleElementTypes4.1.normal.js b/crates/swc/tests/tsc-references/tupleElementTypes4.1.normal.js
index e0d6fca66f28..8dcc8b77cd0c 100644
--- a/crates/swc/tests/tsc-references/tupleElementTypes4.1.normal.js
+++ b/crates/swc/tests/tsc-references/tupleElementTypes4.1.normal.js
@@ -1,8 +1,8 @@
 //// [tupleElementTypes4.ts]
 import _sliced_to_array from "@swc/helpers/src/_sliced_to_array.mjs";
 function f() {
-    var ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
+    var _ref = _sliced_to_array(arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : [
         0,
         undefined
-    ], 2), a = ref[0], b = ref[1];
+    ], 2), a = _ref[0], b = _ref[1];
 }
diff --git a/crates/swc/tests/tsc-references/typeFromPropertyAssignment25.1.normal.js b/crates/swc/tests/tsc-references/typeFromPropertyAssignment25.1.normal.js
index 9bc34f3113cc..1bf7db83d7df 100644
--- a/crates/swc/tests/tsc-references/typeFromPropertyAssignment25.1.normal.js
+++ b/crates/swc/tests/tsc-references/typeFromPropertyAssignment25.1.normal.js
@@ -8,9 +8,9 @@ Common.I = function _class() {
     _class_call_check(this, _class);
     this.i = 1;
 };
-Common.O = /*#__PURE__*/ function(_I) {
+Common.O = /*#__PURE__*/ function(_Common_I) {
     "use strict";
-    _inherits(_class, _I);
+    _inherits(_class, _Common_I);
     var _super = _create_super(_class);
     function _class() {
         _class_call_check(this, _class);
diff --git a/crates/swc/tests/tsc-references/typeFromPropertyAssignment25.2.minified.js b/crates/swc/tests/tsc-references/typeFromPropertyAssignment25.2.minified.js
index 989ac22ce51e..0e3a95af6587 100644
--- a/crates/swc/tests/tsc-references/typeFromPropertyAssignment25.2.minified.js
+++ b/crates/swc/tests/tsc-references/typeFromPropertyAssignment25.2.minified.js
@@ -6,9 +6,9 @@ var Common = {};
 Common.I = function _class() {
     "use strict";
     _class_call_check(this, _class), this.i = 1;
-}, Common.O = function(_I) {
+}, Common.O = function(_Common_I) {
     "use strict";
-    _inherits(_class, _I);
+    _inherits(_class, _Common_I);
     var _super = _create_super(_class);
     function _class() {
         var _this;
diff --git a/crates/swc/tests/tsc-references/typeFromPropertyAssignment26.1.normal.js b/crates/swc/tests/tsc-references/typeFromPropertyAssignment26.1.normal.js
index 5ab09c5082cc..49f6712a627a 100644
--- a/crates/swc/tests/tsc-references/typeFromPropertyAssignment26.1.normal.js
+++ b/crates/swc/tests/tsc-references/typeFromPropertyAssignment26.1.normal.js
@@ -9,9 +9,9 @@ UI.TreeElement = function _class() {
     this.treeOutline = 12;
 };
 UI.context = new UI.TreeElement();
-var C = /*#__PURE__*/ function(_TreeElement) {
+var C = /*#__PURE__*/ function(_UI_TreeElement) {
     "use strict";
-    _inherits(C, _TreeElement);
+    _inherits(C, _UI_TreeElement);
     var _super = _create_super(C);
     function C() {
         _class_call_check(this, C);
diff --git a/crates/swc/tests/tsc-references/typeFromPropertyAssignmentOutOfOrder.1.normal.js b/crates/swc/tests/tsc-references/typeFromPropertyAssignmentOutOfOrder.1.normal.js
index 8c5d8ba99dca..f49e9186b2ca 100644
--- a/crates/swc/tests/tsc-references/typeFromPropertyAssignmentOutOfOrder.1.normal.js
+++ b/crates/swc/tests/tsc-references/typeFromPropertyAssignmentOutOfOrder.1.normal.js
@@ -6,9 +6,9 @@ First.Item = function I() {
     "use strict";
     _class_call_check(this, I);
 };
-Common.Object = /*#__PURE__*/ function(_Item) {
+Common.Object = /*#__PURE__*/ function(_First_Item) {
     "use strict";
-    _inherits(_class, _Item);
+    _inherits(_class, _First_Item);
     var _super = _create_super(_class);
     function _class() {
         _class_call_check(this, _class);
@@ -16,9 +16,9 @@ Common.Object = /*#__PURE__*/ function(_Item) {
     }
     return _class;
 }(First.Item);
-Workspace.Object = /*#__PURE__*/ function(_Object) {
+Workspace.Object = /*#__PURE__*/ function(_Common_Object) {
     "use strict";
-    _inherits(_class, _Object);
+    _inherits(_class, _Common_Object);
     var _super = _create_super(_class);
     function _class() {
         _class_call_check(this, _class);
diff --git a/crates/swc/tests/tsc-references/typeFromPropertyAssignmentOutOfOrder.2.minified.js b/crates/swc/tests/tsc-references/typeFromPropertyAssignmentOutOfOrder.2.minified.js
index 344a84331ec1..63c451c96d44 100644
--- a/crates/swc/tests/tsc-references/typeFromPropertyAssignmentOutOfOrder.2.minified.js
+++ b/crates/swc/tests/tsc-references/typeFromPropertyAssignmentOutOfOrder.2.minified.js
@@ -5,17 +5,17 @@ import _create_super from "@swc/helpers/src/_create_super.mjs";
 First.Item = function I() {
     "use strict";
     _class_call_check(this, I);
-}, Common.Object = function(_Item) {
+}, Common.Object = function(_First_Item) {
     "use strict";
-    _inherits(_class, _Item);
+    _inherits(_class, _First_Item);
     var _super = _create_super(_class);
     function _class() {
         return _class_call_check(this, _class), _super.apply(this, arguments);
     }
     return _class;
-}(First.Item), Workspace.Object = function(_Object) {
+}(First.Item), Workspace.Object = function(_Common_Object) {
     "use strict";
-    _inherits(_class, _Object);
+    _inherits(_class, _Common_Object);
     var _super = _create_super(_class);
     function _class() {
         return _class_call_check(this, _class), _super.apply(this, arguments);
diff --git a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es2015).1.normal.js
index d9086bae1141..afb1dfe70023 100644
--- a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es2015).1.normal.js
@@ -1,11 +1,11 @@
 //// [typeOfThisInStaticMembers12.ts]
-let _c, _c1;
+let _this_c, _this_c1;
 var _Inner;
 class C {
 }
 C.c = "foo";
-C.bar = (_c = C.c, _c1 = C.c, _Inner = class Inner {
+C.bar = (_this_c = C.c, _this_c1 = C.c, _Inner = class Inner {
     constructor(){
-        this[_c1] = 123;
+        this[_this_c1] = 123;
     }
-}, _Inner[_c] = 123, _Inner);
+}, _Inner[_this_c] = 123, _Inner);
diff --git a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es2015).2.minified.js b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es2015).2.minified.js
index e44fb08981f1..268a28aee94d 100644
--- a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es2015).2.minified.js
+++ b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es2015).2.minified.js
@@ -1,10 +1,10 @@
 //// [typeOfThisInStaticMembers12.ts]
 var _Inner;
-let _c, _c1;
+let _this_c, _this_c1;
 class C {
 }
-C.c = "foo", C.bar = (_c = C.c, _c1 = C.c, (_Inner = class {
+C.c = "foo", C.bar = (_this_c = C.c, _this_c1 = C.c, (_Inner = class {
     constructor(){
-        this[_c1] = 123;
+        this[_this_c1] = 123;
     }
-})[_c] = 123, _Inner);
+})[_this_c] = 123, _Inner);
diff --git a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es5).1.normal.js b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es5).1.normal.js
index 15654b6e7e57..77492bf1a06d 100644
--- a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es5).1.normal.js
@@ -1,14 +1,14 @@
 //// [typeOfThisInStaticMembers12.ts]
 import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
-var _c, _c1;
+var _this_c, _this_c1;
 var _Inner;
 var C = function C() {
     "use strict";
     _class_call_check(this, C);
 };
 C.c = "foo";
-C.bar = (_c = C.c, _c1 = C.c, _Inner = function Inner() {
+C.bar = (_this_c = C.c, _this_c1 = C.c, _Inner = function Inner() {
     "use strict";
     _class_call_check(this, Inner);
-    this[_c1] = 123;
-}, _Inner[_c] = 123, _Inner);
+    this[_this_c1] = 123;
+}, _Inner[_this_c] = 123, _Inner);
diff --git a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es5).2.minified.js b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es5).2.minified.js
index 3459a5c2f66c..b006ea285963 100644
--- a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es5).2.minified.js
+++ b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers12(target=es5).2.minified.js
@@ -1,10 +1,10 @@
 //// [typeOfThisInStaticMembers12.ts]
 import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
-var _c, _c1, _Inner, C = function C() {
+var _this_c, _this_c1, _Inner, C = function C() {
     "use strict";
     _class_call_check(this, C);
 };
-C.c = "foo", C.bar = (_c = C.c, _c1 = C.c, (_Inner = function Inner() {
+C.c = "foo", C.bar = (_this_c = C.c, _this_c1 = C.c, (_Inner = function Inner() {
     "use strict";
-    _class_call_check(this, Inner), this[_c1] = 123;
-})[_c] = 123, _Inner);
+    _class_call_check(this, Inner), this[_this_c1] = 123;
+})[_this_c] = 123, _Inner);
diff --git a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es2015).1.normal.js b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es2015).1.normal.js
index 7a27a701ba1e..1607299e3bba 100644
--- a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es2015).1.normal.js
+++ b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es2015).1.normal.js
@@ -1,12 +1,12 @@
 //// [typeOfThisInStaticMembers13.ts]
 import _define_property from "@swc/helpers/src/_define_property.mjs";
-let _c, _c1;
+let _this_c, _this_c1;
 var _Inner;
 class C {
 }
 _define_property(C, "c", "foo");
-_define_property(C, "bar", (_c = C.c, _c1 = C.c, _Inner = class Inner {
+_define_property(C, "bar", (_this_c = C.c, _this_c1 = C.c, _Inner = class Inner {
     constructor(){
-        _define_property(this, _c1, 123);
+        _define_property(this, _this_c1, 123);
     }
-}, _define_property(_Inner, _c, 123), _Inner));
+}, _define_property(_Inner, _this_c, 123), _Inner));
diff --git a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es2015).2.minified.js b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es2015).2.minified.js
index 2e7dbae14f73..533beae27733 100644
--- a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es2015).2.minified.js
+++ b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es2015).2.minified.js
@@ -1,11 +1,11 @@
 //// [typeOfThisInStaticMembers13.ts]
 var _Inner;
-let _c, _c1;
+let _this_c, _this_c1;
 import _define_property from "@swc/helpers/src/_define_property.mjs";
 class C {
 }
-_define_property(C, "c", "foo"), _define_property(C, "bar", (_c = C.c, _c1 = C.c, _Inner = class {
+_define_property(C, "c", "foo"), _define_property(C, "bar", (_this_c = C.c, _this_c1 = C.c, _Inner = class {
     constructor(){
-        _define_property(this, _c1, 123);
+        _define_property(this, _this_c1, 123);
     }
-}, _define_property(_Inner, _c, 123), _Inner));
+}, _define_property(_Inner, _this_c, 123), _Inner));
diff --git a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es5).1.normal.js b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es5).1.normal.js
index be88de709183..7bfbaf075923 100644
--- a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es5).1.normal.js
+++ b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es5).1.normal.js
@@ -1,15 +1,15 @@
 //// [typeOfThisInStaticMembers13.ts]
 import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _define_property from "@swc/helpers/src/_define_property.mjs";
-var _c, _c1;
+var _this_c, _this_c1;
 var _Inner;
 var C = function C() {
     "use strict";
     _class_call_check(this, C);
 };
 _define_property(C, "c", "foo");
-_define_property(C, "bar", (_c = C.c, _c1 = C.c, _Inner = function Inner() {
+_define_property(C, "bar", (_this_c = C.c, _this_c1 = C.c, _Inner = function Inner() {
     "use strict";
     _class_call_check(this, Inner);
-    _define_property(this, _c1, 123);
-}, _define_property(_Inner, _c, 123), _Inner));
+    _define_property(this, _this_c1, 123);
+}, _define_property(_Inner, _this_c, 123), _Inner));
diff --git a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es5).2.minified.js b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es5).2.minified.js
index eaf257f64f2e..1e88a5887d85 100644
--- a/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es5).2.minified.js
+++ b/crates/swc/tests/tsc-references/typeOfThisInStaticMembers13(target=es5).2.minified.js
@@ -1,11 +1,11 @@
 //// [typeOfThisInStaticMembers13.ts]
 import _class_call_check from "@swc/helpers/src/_class_call_check.mjs";
 import _define_property from "@swc/helpers/src/_define_property.mjs";
-var _c, _c1, _Inner, C = function C() {
+var _this_c, _this_c1, _Inner, C = function C() {
     "use strict";
     _class_call_check(this, C);
 };
-_define_property(C, "c", "foo"), _define_property(C, "bar", (_c = C.c, _c1 = C.c, _Inner = function Inner() {
+_define_property(C, "c", "foo"), _define_property(C, "bar", (_this_c = C.c, _this_c1 = C.c, _Inner = function Inner() {
     "use strict";
-    _class_call_check(this, Inner), _define_property(this, _c1, 123);
-}, _define_property(_Inner, _c, 123), _Inner));
+    _class_call_check(this, Inner), _define_property(this, _this_c1, 123);
+}, _define_property(_Inner, _this_c, 123), _Inner));
diff --git a/crates/swc/tests/tsc-references/typeOfThisInstanceMemberNarrowedWithLoopAntecedent.1.normal.js b/crates/swc/tests/tsc-references/typeOfThisInstanceMemberNarrowedWithLoopAntecedent.1.normal.js
index 680b5f7bad02..57341e5850c4 100644
--- a/crates/swc/tests/tsc-references/typeOfThisInstanceMemberNarrowedWithLoopAntecedent.1.normal.js
+++ b/crates/swc/tests/tsc-references/typeOfThisInstanceMemberNarrowedWithLoopAntecedent.1.normal.js
@@ -23,13 +23,13 @@ var SomeClass2 = /*#__PURE__*/ function() {
     }
     var _proto = SomeClass2.prototype;
     _proto.method = function method() {
-        var ref;
+        var _this_state;
         var c = false;
         while(c){}
         if (this.state.type === "numberVariant") {
             this.state.data;
         }
-        var n = (ref = this.state) === null || ref === void 0 ? void 0 : ref.data; // This should be an error
+        var n = (_this_state = this.state) === null || _this_state === void 0 ? void 0 : _this_state.data; // This should be an error
     };
     return SomeClass2;
 }();
diff --git a/crates/swc/tests/tsc-references/unionTypeReduction2.1.normal.js b/crates/swc/tests/tsc-references/unionTypeReduction2.1.normal.js
index ddb5b18f6731..27dd723f84ae 100644
--- a/crates/swc/tests/tsc-references/unionTypeReduction2.1.normal.js
+++ b/crates/swc/tests/tsc-references/unionTypeReduction2.1.normal.js
@@ -38,7 +38,7 @@ var k = {
     something: function something() {}
 };
 function run(options) {
-    var _something;
-    var something = (_something = options.something) !== null && _something !== void 0 ? _something : val.something;
+    var _options_something;
+    var something = (_options_something = options.something) !== null && _options_something !== void 0 ? _options_something : val.something;
     something("");
 }
diff --git a/crates/swc/tests/tsc-references/wideningTuples5.1.normal.js b/crates/swc/tests/tsc-references/wideningTuples5.1.normal.js
index c7a340282d21..3862b05ce207 100644
--- a/crates/swc/tests/tsc-references/wideningTuples5.1.normal.js
+++ b/crates/swc/tests/tsc-references/wideningTuples5.1.normal.js
@@ -1,5 +1,5 @@
 //// [wideningTuples5.ts]
-var ref = [
+var _ref = [
     undefined,
     null
-], a = ref[0], b = ref[1];
+], a = _ref[0], b = _ref[1];
diff --git a/crates/swc/tests/tsc-references/wideningTuples5.2.minified.js b/crates/swc/tests/tsc-references/wideningTuples5.2.minified.js
index 2f951821accf..99501dbd2a0f 100644
--- a/crates/swc/tests/tsc-references/wideningTuples5.2.minified.js
+++ b/crates/swc/tests/tsc-references/wideningTuples5.2.minified.js
@@ -1,6 +1,6 @@
 //// [wideningTuples5.ts]
-var ref = [
+var _ref = [
     void 0,
     null
 ];
-ref[0], ref[1];
+_ref[0], _ref[1];
diff --git a/crates/swc/tests/tsc-references/wideningTuples6.1.normal.js b/crates/swc/tests/tsc-references/wideningTuples6.1.normal.js
index 0bd1cb3886c1..386ef597f06b 100644
--- a/crates/swc/tests/tsc-references/wideningTuples6.1.normal.js
+++ b/crates/swc/tests/tsc-references/wideningTuples6.1.normal.js
@@ -1,7 +1,7 @@
 //// [wideningTuples6.ts]
-var ref = [
+var _ref = [
     undefined,
     null
-], a = ref[0], b = ref[1];
+], a = _ref[0], b = _ref[1];
 a = "";
 b = "";
diff --git a/crates/swc/tests/tsc-references/wideningTuples6.2.minified.js b/crates/swc/tests/tsc-references/wideningTuples6.2.minified.js
index 7a3ea1af65a3..dd83e317fb4e 100644
--- a/crates/swc/tests/tsc-references/wideningTuples6.2.minified.js
+++ b/crates/swc/tests/tsc-references/wideningTuples6.2.minified.js
@@ -1,6 +1,6 @@
 //// [wideningTuples6.ts]
-var ref = [
+var _ref = [
     void 0,
     null
 ];
-ref[0], ref[1];
+_ref[0], _ref[1];
diff --git a/crates/swc/tests/vercel/loader-only/2/output/index.js b/crates/swc/tests/vercel/loader-only/2/output/index.js
index b9c5df7fa247..8805cc89e04c 100644
--- a/crates/swc/tests/vercel/loader-only/2/output/index.js
+++ b/crates/swc/tests/vercel/loader-only/2/output/index.js
@@ -4,11 +4,11 @@ import { useRouter } from "next/router";
 import { useProject } from "@swr/use-project";
 import useTeam from "@swr/use-team";
 export default function MyComp() {
-    var _query = useRouter().query, projectName = _query.project;
-    var ref = useProject(projectName), projectInfo = ref.data;
+    var _useRouter_query = useRouter().query, projectName = _useRouter_query.project;
+    var _useProject = useProject(projectName), projectInfo = _useProject.data;
     var teamSlug = useTeam().teamSlug;
     var projectId = projectInfo === null || projectInfo === void 0 ? void 0 : projectInfo.id;
-    var ref1 = useProjectBranches(projectId), branches = ref1.data;
+    var _useProjectBranches = useProjectBranches(projectId), branches = _useProjectBranches.data;
     return /*#__PURE__*/ _jsx(_Fragment, {});
 }
 for(var i = 0; i < points.length; i++){
diff --git a/crates/swc/tests/vercel/loader-only/next-39460/output/snippetSession.js b/crates/swc/tests/vercel/loader-only/next-39460/output/snippetSession.js
index dcd340051f3a..babebf7a4542 100644
--- a/crates/swc/tests/vercel/loader-only/next-39460/output/snippetSession.js
+++ b/crates/swc/tests/vercel/loader-only/next-39460/output/snippetSession.js
@@ -193,7 +193,7 @@ export var OneSnippet = /*#__PURE__*/ function() {
                 // change stickness to never grow when typing at its edges
                 // so that in-active tabstops never grow
                 for(var _iterator2 = _this._placeholderDecorations[Symbol.iterator](), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true){
-                    var _value = _sliced_to_array(_step2.value, 2), placeholder1 = _value[0], id2 = _value[1];
+                    var _step_value = _sliced_to_array(_step2.value, 2), placeholder1 = _step_value[0], id2 = _step_value[1];
                     if (!activePlaceholders.has(placeholder1)) {
                         accessor.changeDecorationOptions(id2, placeholder1.isFinalTabstop ? OneSnippet._decor.inactiveFinal : OneSnippet._decor.inactive);
                     }
@@ -468,7 +468,7 @@ export var SnippetSession = /*#__PURE__*/ function() {
             return;
         }
         // make insert edit and start with first selections
-        var ref = SnippetSession.createEditsAndSnippets(this._editor, this._template, this._options.overwriteBefore, this._options.overwriteAfter, false, this._options.adjustWhitespace, this._options.clipboardText, this._options.overtypingCapturer), edits = ref.edits, snippets = ref.snippets;
+        var _SnippetSession_createEditsAndSnippets = SnippetSession.createEditsAndSnippets(this._editor, this._template, this._options.overwriteBefore, this._options.overwriteAfter, false, this._options.adjustWhitespace, this._options.clipboardText, this._options.overtypingCapturer), edits = _SnippetSession_createEditsAndSnippets.edits, snippets = _SnippetSession_createEditsAndSnippets.snippets;
         this._snippets = snippets;
         this._editor.executeEdits("snippet", edits, function(undoEdits) {
             if (_this._snippets[0].hasPlaceholder) {
@@ -495,7 +495,7 @@ export var SnippetSession = /*#__PURE__*/ function() {
             this._snippets[0]._placeholderGroupsIdx,
             template
         ]);
-        var ref = SnippetSession.createEditsAndSnippets(this._editor, template, options.overwriteBefore, options.overwriteAfter, true, options.adjustWhitespace, options.clipboardText, options.overtypingCapturer), edits = ref.edits, snippets = ref.snippets;
+        var _SnippetSession_createEditsAndSnippets = SnippetSession.createEditsAndSnippets(this._editor, template, options.overwriteBefore, options.overwriteAfter, true, options.adjustWhitespace, options.clipboardText, options.overtypingCapturer), edits = _SnippetSession_createEditsAndSnippets.edits, snippets = _SnippetSession_createEditsAndSnippets.snippets;
         this._editor.executeEdits("snippet", edits, function(undoEdits) {
             var _iteratorNormalCompletion = true, _didIteratorError = false, _iteratorError = undefined;
             try {
@@ -590,7 +590,7 @@ export var SnippetSession = /*#__PURE__*/ function() {
                     var _iteratorNormalCompletion = true, _didIteratorError = false, _iteratorError = undefined;
                     try {
                         for(var _iterator = possibleSelections[Symbol.iterator](), _step1; !(_iteratorNormalCompletion = (_step1 = _iterator.next()).done); _iteratorNormalCompletion = true){
-                            var _value = _sliced_to_array(_step1.value, 2), index = _value[0], ranges = _value[1];
+                            var _step_value = _sliced_to_array(_step1.value, 2), index = _step_value[0], ranges = _step_value[1];
                             ranges.sort(Range.compareRangesUsingStarts);
                             var _iteratorNormalCompletion1 = true, _didIteratorError1 = false, _iteratorError1 = undefined;
                             try {
@@ -670,7 +670,7 @@ export var SnippetSession = /*#__PURE__*/ function() {
         var _iteratorNormalCompletion1 = true, _didIteratorError1 = false, _iteratorError1 = undefined;
         try {
             for(var _iterator1 = allPossibleSelections[Symbol.iterator](), _step1; !(_iteratorNormalCompletion1 = (_step1 = _iterator1.next()).done); _iteratorNormalCompletion1 = true){
-                var _value = _sliced_to_array(_step1.value, 2), index = _value[0], ranges = _value[1];
+                var _step_value = _sliced_to_array(_step1.value, 2), index = _step_value[0], ranges = _step_value[1];
                 if (ranges.length !== selections.length) {
                     allPossibleSelections.delete(index);
                     continue;
@@ -805,7 +805,7 @@ export var SnippetSession = /*#__PURE__*/ function() {
         var _iteratorNormalCompletion = true, _didIteratorError = false, _iteratorError = undefined;
         try {
             for(var _iterator = indexedSelections[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true){
-                var _value = _step.value, selection = _value.selection, idx = _value.idx;
+                var _step_value = _step.value, selection = _step_value.selection, idx = _step_value.idx;
                 // extend selection with the `overwriteBefore` and `overwriteAfter` and then
                 // compare if this matches the extensions of the primary selection
                 var extensionBefore = SnippetSession.adjustSelection(model, selection, overwriteBefore, 0);
diff --git a/crates/swc/tests/vercel/loader-only/react-autowhatever/1/output/index.js b/crates/swc/tests/vercel/loader-only/react-autowhatever/1/output/index.js
index d6d175c5b82c..3ee1d4440b6d 100644
--- a/crates/swc/tests/vercel/loader-only/react-autowhatever/1/output/index.js
+++ b/crates/swc/tests/vercel/loader-only/react-autowhatever/1/output/index.js
@@ -29,7 +29,7 @@ var ItemsList = /*#__PURE__*/ function(Component) {
     };
     _proto.render = function render() {
         var _this = this;
-        var _props = this.props, items = _props.items, itemProps = _props.itemProps, renderItem = _props.renderItem, renderItemData = _props.renderItemData, sectionIndex = _props.sectionIndex, highlightedItemIndex = _props.highlightedItemIndex, getItemId = _props.getItemId, theme = _props.theme, keyPrefix = _props.keyPrefix;
+        var _this_props = this.props, items = _this_props.items, itemProps = _this_props.itemProps, renderItem = _this_props.renderItem, renderItemData = _this_props.renderItemData, sectionIndex = _this_props.sectionIndex, highlightedItemIndex = _this_props.highlightedItemIndex, getItemId = _this_props.getItemId, theme = _this_props.theme, keyPrefix = _this_props.keyPrefix;
         var sectionPrefix = sectionIndex === null ? keyPrefix : "".concat(keyPrefix, "section-").concat(sectionIndex, "-");
         var isItemPropsFunction = typeof itemProps === "function";
         return /*#__PURE__*/ _jsx("ul", _object_spread_props(_object_spread({
diff --git a/crates/swc/tests/vercel/loader-only/react-instantsearch/1/output/index.js b/crates/swc/tests/vercel/loader-only/react-instantsearch/1/output/index.js
index 49f1dd250216..30217b86aec6 100644
--- a/crates/swc/tests/vercel/loader-only/react-instantsearch/1/output/index.js
+++ b/crates/swc/tests/vercel/loader-only/react-instantsearch/1/output/index.js
@@ -72,7 +72,7 @@ function serializeQueryParameters(parameters) {
  * @param {number} stalledSearchDelay - time (in ms) after the search is stalled
  * @return {InstantSearchManager} a new instance of InstantSearchManager
  */ export default function createInstantSearchManager(param) {
-    var indexName = param.indexName, _initialState = param.initialState, initialState = _initialState === void 0 ? {} : _initialState, searchClient = param.searchClient, resultsState = param.resultsState, stalledSearchDelay = param.stalledSearchDelay;
+    var indexName = param.indexName, _param_initialState = param.initialState, initialState = _param_initialState === void 0 ? {} : _param_initialState, searchClient = param.searchClient, resultsState = param.resultsState, stalledSearchDelay = param.stalledSearchDelay;
     var createStore = function createStore(initialState) {
         var state = initialState;
         var listeners = [];
@@ -160,7 +160,7 @@ function serializeQueryParameters(parameters) {
     };
     var search = function search() {
         if (!skip) {
-            var ref = getSearchParameters(helper.state), mainParameters = ref.mainParameters, derivedParameters = ref.derivedParameters;
+            var _getSearchParameters = getSearchParameters(helper.state), mainParameters = _getSearchParameters.mainParameters, derivedParameters = _getSearchParameters.derivedParameters;
             // We have to call `slice` because the method `detach` on the derived
             // helpers mutates the value `derivedHelpers`. The `forEach` loop does
             // not iterate on each value and we're not able to correctly clear the
@@ -247,15 +247,15 @@ function serializeQueryParameters(parameters) {
     };
     var handleNewSearch = function handleNewSearch() {
         if (!stalledSearchTimer) {
-            var _tmp;
-            _tmp = setTimeout(function() {
-                var _ref = store.getState(), resultsFacetValues = _ref.resultsFacetValues, partialState = _object_without_properties(_ref, [
+            var _setTimeout;
+            _setTimeout = setTimeout(function() {
+                var _store_getState = store.getState(), resultsFacetValues = _store_getState.resultsFacetValues, partialState = _object_without_properties(_store_getState, [
                     "resultsFacetValues"
                 ]);
                 store.setState(_object_spread_props(_object_spread({}, partialState), {
                     isSearchStalled: true
                 }));
-            }, stalledSearchDelay), stalledSearchTimer = _tmp, _tmp;
+            }, stalledSearchDelay), stalledSearchTimer = _setTimeout, _setTimeout;
         }
     };
     var hydrateSearchClient = function hydrateSearchClient(client, results) {
@@ -427,7 +427,7 @@ function serializeQueryParameters(parameters) {
         search();
     };
     var onSearchForFacetValues = function onSearchForFacetValues(param) {
-        var facetName = param.facetName, query = param.query, _maxFacetHits = param.maxFacetHits, maxFacetHits = _maxFacetHits === void 0 ? 10 : _maxFacetHits;
+        var facetName = param.facetName, query = param.query, _param_maxFacetHits = param.maxFacetHits, maxFacetHits = _param_maxFacetHits === void 0 ? 10 : _param_maxFacetHits;
         // The values 1, 100 are the min / max values that the engine accepts.
         // see: https://www.algolia.com/doc/api-reference/api-parameters/maxFacetHits
         var maxFacetHitsWithinRange = Math.max(1, Math.min(maxFacetHits, 100));
diff --git a/crates/swc_ecma_transforms/tests/es2015_function_name.rs b/crates/swc_ecma_transforms/tests/es2015_function_name.rs
index 2250324f73ff..0d2db2fe877f 100644
--- a/crates/swc_ecma_transforms/tests/es2015_function_name.rs
+++ b/crates/swc_ecma_transforms/tests/es2015_function_name.rs
@@ -324,9 +324,9 @@ var _store = require("./store");
 
 let Login =
 /*#__PURE__*/
-function (_Component) {
+function (_React_Component) {
   "use strict";
-  _inherits(Login, _Component);
+  _inherits(Login, _React_Component);
   var _super = _createSuper(Login);
   function Login() {
     _classCallCheck(this, Login);
diff --git a/crates/swc_ecma_transforms_compat/src/es2015/mod.rs b/crates/swc_ecma_transforms_compat/src/es2015/mod.rs
index 690440124e85..4a29c9ead8bd 100644
--- a/crates/swc_ecma_transforms_compat/src/es2015/mod.rs
+++ b/crates/swc_ecma_transforms_compat/src/es2015/mod.rs
@@ -176,9 +176,9 @@ export var Foo = function() {
 class HomePage extends React.Component {}
 "#,
         r#"
-        var HomePage = /*#__PURE__*/function (_Component) {
+        var HomePage = /*#__PURE__*/function (_React_Component) {
             "use strict";
-            _inherits(HomePage, _Component);
+            _inherits(HomePage, _React_Component);
 
             var _super = _createSuper(HomePage);
 
diff --git a/crates/swc_ecma_transforms_compat/src/es2018/object_rest_spread.rs b/crates/swc_ecma_transforms_compat/src/es2018/object_rest_spread.rs
index ae41043ce0db..112280dd9795 100644
--- a/crates/swc_ecma_transforms_compat/src/es2018/object_rest_spread.rs
+++ b/crates/swc_ecma_transforms_compat/src/es2018/object_rest_spread.rs
@@ -363,7 +363,7 @@ impl VisitMut for ObjectRest {
                 Pat::Ident(ref i) => (i.id.clone(), false),
 
                 _ => match decl.init {
-                    Some(ref e) => alias_if_required(e, "_ref"),
+                    Some(ref e) => alias_if_required(e, "ref"),
                     _ => (private_ident!("_ref"), true),
                 },
             };
diff --git a/crates/swc_ecma_transforms_compat/src/es2020/nullish_coalescing/mod.rs b/crates/swc_ecma_transforms_compat/src/es2020/nullish_coalescing.rs
similarity index 99%
rename from crates/swc_ecma_transforms_compat/src/es2020/nullish_coalescing/mod.rs
rename to crates/swc_ecma_transforms_compat/src/es2020/nullish_coalescing.rs
index ece24839d67c..be06b22d83bc 100644
--- a/crates/swc_ecma_transforms_compat/src/es2020/nullish_coalescing/mod.rs
+++ b/crates/swc_ecma_transforms_compat/src/es2020/nullish_coalescing.rs
@@ -7,9 +7,6 @@ use swc_ecma_utils::{alias_if_required, undefined, StmtLike};
 use swc_ecma_visit::{as_folder, noop_visit_mut_type, Fold, VisitMut, VisitMutWith};
 use swc_trace_macro::swc_trace;
 
-#[cfg(test)]
-mod tests;
-
 #[tracing::instrument(level = "info", skip_all)]
 pub fn nullish_coalescing(c: Config) -> impl Fold + VisitMut + 'static {
     as_folder(NullishCoalescing {
diff --git a/crates/swc_ecma_transforms_compat/src/es2020/opt_chaining.rs b/crates/swc_ecma_transforms_compat/src/es2020/opt_chaining.rs
index a52844351558..2a8b4af1050b 100644
--- a/crates/swc_ecma_transforms_compat/src/es2020/opt_chaining.rs
+++ b/crates/swc_ecma_transforms_compat/src/es2020/opt_chaining.rs
@@ -7,7 +7,7 @@ use swc_ecma_ast::*;
 use swc_ecma_transforms_base::perf::Check;
 use swc_ecma_transforms_macros::fast_path;
 use swc_ecma_utils::{
-    alias_if_required, opt_chain_test, prepend_stmt, private_ident, undefined, ExprFactory,
+    alias_ident_for, alias_if_required, opt_chain_test, prepend_stmt, undefined, ExprFactory,
     IntoIndirectCall, StmtLike,
 };
 use swc_ecma_visit::{
@@ -389,7 +389,7 @@ impl OptChaining {
                 let (left, right, alt) = match &mut **obj {
                     Expr::Ident(..) => (obj.clone(), obj.clone(), Box::new(e.base.take().into())),
                     _ => {
-                        let i = private_ident!(obj_span, "ref");
+                        let i = alias_ident_for(obj, "ref");
                         self.vars_without_init.push(VarDeclarator {
                             span: obj_span,
                             definite: false,
@@ -462,6 +462,9 @@ impl OptChaining {
                         } else {
                             (Ident::dummy(), false)
                         };
+
+                        let tmp = alias_ident_for(&call.callee, "ref");
+
                         let obj_expr = if !is_super_access && aliased {
                             self.vars_without_init.push(VarDeclarator {
                                 span: obj_span,
@@ -493,8 +496,6 @@ impl OptChaining {
                             call.callee.take()
                         };
 
-                        let tmp = private_ident!(obj_span, "ref");
-
                         self.vars_without_init.push(VarDeclarator {
                             span: obj_span,
                             definite: false,
diff --git a/crates/swc_ecma_transforms_compat/tests/es2015_classes.rs b/crates/swc_ecma_transforms_compat/tests/es2015_classes.rs
index e8258d99434c..7c527c43c57e 100644
--- a/crates/swc_ecma_transforms_compat/tests/es2015_classes.rs
+++ b/crates/swc_ecma_transforms_compat/tests/es2015_classes.rs
@@ -76,9 +76,9 @@ test!(
 class HomePage extends React.Component {}
 "#,
     r#"
-let HomePage = function(_Component) {
+let HomePage = function(_React_Component) {
     "use strict";
-    _inherits(HomePage, _Component);
+    _inherits(HomePage, _React_Component);
     var _super = _createSuper(HomePage);
     function HomePage() {
         _classCallCheck(this, HomePage);
@@ -4479,10 +4479,10 @@ class BaseController2 extends Chaplin.Controller.Another {
     r#"
 var BaseController =
 /*#__PURE__*/
-function (_Controller) {
+function (_Chaplin_Controller) {
   "use strict";
 
-  _inherits(BaseController, _Controller);
+  _inherits(BaseController, _Chaplin_Controller);
   var _super = _createSuper(BaseController);
   function BaseController() {
     _classCallCheck(this, BaseController);
@@ -4494,10 +4494,10 @@ function (_Controller) {
 
 var BaseController2 =
 /*#__PURE__*/
-function (_Another) {
+function (_Chaplin_Controller_Another) {
   "use strict";
 
-  _inherits(BaseController2, _Another);
+  _inherits(BaseController2, _Chaplin_Controller_Another);
   var _super = _createSuper(BaseController2);
   function BaseController2() {
     _classCallCheck(this, BaseController2);
@@ -7252,27 +7252,27 @@ class BaseController extends Chaplin.Controller { }
 class BaseController2 extends Chaplin.Controller.Another { }
 "#,
     r#"
-let BaseController = /*#__PURE__*/function (_Controller) {
+let BaseController = /*#__PURE__*/function (_Chaplin_Controller) {
   "use strict";
 
-  _inherits(BaseController, _Controller);
+  _inherits(BaseController, _Chaplin_Controller);
 
   function BaseController() {
     _classCallCheck(this, BaseController);
-    return _Controller.apply(this, arguments);
+    return _Chaplin_Controller.apply(this, arguments);
   }
 
   return BaseController;
 }(Chaplin.Controller);
 
-let BaseController2 = /*#__PURE__*/function (_Another) {
+let BaseController2 = /*#__PURE__*/function (_Chaplin_Controller_Another) {
   "use strict";
 
-  _inherits(BaseController2, _Another);
+  _inherits(BaseController2, _Chaplin_Controller_Another);
 
   function BaseController2() {
     _classCallCheck(this, BaseController2);
-    return _Another.apply(this, arguments);
+    return _Chaplin_Controller_Another.apply(this, arguments);
   }
 
   return BaseController2;
diff --git a/crates/swc_ecma_transforms_compat/tests/es2015_destructuring.rs b/crates/swc_ecma_transforms_compat/tests/es2015_destructuring.rs
index 40d296b45499..929cfa9a0e29 100644
--- a/crates/swc_ecma_transforms_compat/tests/es2015_destructuring.rs
+++ b/crates/swc_ecma_transforms_compat/tests/es2015_destructuring.rs
@@ -38,9 +38,9 @@ test!(
     |_| tr(),
     issue_2821,
     r#"const [x, y, ...z] = [1];"#,
-    r#"const ref = [
+    r#"const _ref = [
     1
-], x = ref[0], y = ref[1], z = ref.slice(2)"#,
+], x = _ref[0], y = _ref[1], z = _ref.slice(2)"#,
     ok_if_code_eq
 );
 
@@ -257,8 +257,8 @@ test!(
     array_pat_assign_prop_binding_6,
     "const [foo = 1] = [];",
     "
-const ref = [],
-    tmp = ref[0],
+const _ref = [],
+    tmp = _ref[0],
     foo = tmp === void 0 ? 1 : tmp;
 "
 );
@@ -269,8 +269,8 @@ test!(
     array_pat_assign_prop_binding_7,
     "const [foo = 1] = [1, 2];",
     "
-const ref = [1, 2],
-    tmp = ref[0],
+const _ref = [1, 2],
+    tmp = _ref[0],
     foo = tmp === void 0 ? 1 : tmp;
 "
 );
@@ -306,9 +306,9 @@ test!(
     object_pat_assign_prop_2,
     "const {code = 1} = {}",
     "
-const ref = {},
-  _code = ref.code,
-  code = _code === void 0 ? 1 : _code;
+const _ref = {},
+  _ref_code = _ref.code,
+  code = _ref_code === void 0 ? 1 : _ref_code;
 "
 );
 
@@ -329,8 +329,8 @@ test!(
     object_pat_assign_prop_binding_2,
     "const {foo: bar = 1} = {}",
     "
-const ref = {},
-  tmp = ref.foo,
+const _ref = {},
+  tmp = _ref.foo,
   bar = tmp === void 0 ? 1 : tmp;
 "
 );
@@ -392,7 +392,7 @@ test!(
     |_| tr(),
     obj_assign_pat,
     r#"let { a = 1 } = foo"#,
-    r#"let _a = foo.a, a = _a === void 0 ? 1 : _a;"#
+    r#"let _foo_a = foo.a, a = _foo_a === void 0 ? 1 : _foo_a;"#
 );
 
 test!(
@@ -411,7 +411,7 @@ test!(
     |_| tr(),
     array1,
     r#"var [a, [b], [c]] = ["hello", [", ", "junk"], ["world"]];"#,
-    r#"var a = "hello", ref = [", ", "junk"], b = ref[0], c = "world";"#
+    r#"var a = "hello", _ref = [", ", "junk"], b = _ref[0], c = "world";"#
 );
 
 test!(
@@ -478,8 +478,8 @@ test!(
     |_| tr(),
     empty,
     r#"var [, a, [b], [c], d] = ["foo", "hello", [", ", "junk"], ["world"]];"#,
-    r#"var ref = ["foo", "hello", [", ", "junk"], ["world"]], a = ref[1], ref1 = ref[2],
-     b = ref1[0], ref2 = ref[3], c = ref2[0], d = ref[4];
+    r#"var _ref = ["foo", "hello", [", ", "junk"], ["world"]], a = _ref[1], _ref_ = _ref[2],
+     b = _ref_[0], _ref_1 = _ref[3], c = _ref_1[0], d = _ref[4];
 "#
 );
 
@@ -557,11 +557,11 @@ test!(
     export_variable_issue_2858_1,
     r#"export const { a: a2, b: b2 } = { a: 1, b: 2 };"#,
     r#"
-var ref = {
+var _ref = {
     a: 1,
     b: 2,
 };
-export const a2 = ref.a, b2 = ref.b;
+export const a2 = _ref.a, b2 = _ref.b;
 "#
 );
 
@@ -571,10 +571,10 @@ test!(
     export_variable_issue_2858_2,
     r#"export const { a: b } = { a: 1 }"#,
     r#"
-var ref = {
+var _ref = {
     a: 1
 };
-export const b = ref.a;
+export const b = _ref.a;
 "#
 );
 
@@ -590,16 +590,16 @@ export const {
 } = { a: 1, b: { c: 1 } };
 "#,
     r#"
-var ref = {
+var _ref = {
     a: 1,
     b: {
       c: 1,
     },
   },
-  _b = ref.b;
-export const a1 = ref.a,
-  b1 = ref.b,
-  c1 = _b.c;
+  _ref_b = _ref.b;
+export const a1 = _ref.a,
+  b1 = _ref.b,
+  c1 = _ref_b.c;
 "#
 );
 
@@ -1360,9 +1360,9 @@ console.log(unpackArray(["hello", ", ", "world"], [1, 2, 3]));
 "#,
     r#"
 function somethingAdvanced(param, p2, p3) {
-  var tmp = param.topLeft, ref = tmp === void 0 ? {
-    } : tmp, x1 = ref.x, y1 = ref.y, tmp1 = param.bottomRight, ref1 = tmp1 === void 0 ? {
-    } : tmp1, x2 = ref1.x, y2 = ref1.y;
+  var tmp = param.topLeft, _ref = tmp === void 0 ? {
+    } : tmp, x1 = _ref.x, y1 = _ref.y, tmp1 = param.bottomRight, _ref1 = tmp1 === void 0 ? {
+    } : tmp1, x2 = _ref1.x, y2 = _ref1.y;
 }
 
 function unpackObject(param) {
@@ -1442,31 +1442,31 @@ test!(
     var a = 1,
         b = 2,
         c = [3, 4];
-    var ref = [1, 2, 3],
-        a = ref[0],
-        b = ref[1];
-    var ref1 = [1, 2, 3],
-        a = ref1[0],
-        b = ref1[1];
-    var ref2 = [a, b],
-        a = ref2[0],
-        b = ref2[1];
-    var ref3;
-    ref3 = [a[1], a[0]], a[0] = ref3[0], a[1] = ref3[1], ref3;
-
-
-    var ref4 = _slicedToArray(_toConsumableArray(foo).concat([bar]), 2), a = ref4[0], b = ref4[1];
+    var _ref = [1, 2, 3],
+        a = _ref[0],
+        b = _ref[1];
+    var _ref1 = [1, 2, 3],
+        a = _ref1[0],
+        b = _ref1[1];
+    var _ref2 = [a, b],
+        a = _ref2[0],
+        b = _ref2[1];
+    var ref;
+    ref = [a[1], a[0]], a[0] = ref[0], a[1] = ref[1], ref;
+
+
+    var _toConsumableArray_concat = _slicedToArray(_toConsumableArray(foo).concat([bar]), 2), a = _toConsumableArray_concat[0], b = _toConsumableArray_concat[1];
     // TODO: var ref4 = _toConsumableArray(foo).concat([bar]), a = ref4[0], b = ref4[1];
 
-var ref5 = [foo(), bar],
-    a = ref5[0],
-    b = ref5[1];
-var ref6 = [clazz.foo(), bar],
-    a = ref6[0],
-    b = ref6[1];
-var ref7 = [clazz.foo, bar],
-    a = ref7[0],
-    b = ref7[1];
+var _ref3 = [foo(), bar],
+    a = _ref3[0],
+    b = _ref3[1];
+var _ref4 = [clazz.foo(), bar],
+    a = _ref4[0],
+    b = _ref4[1];
+var _ref5 = [clazz.foo, bar],
+    a = _ref5[0],
+    b = _ref5[1];
 var a,
     b = 2;
 a = 1, b = 2;
@@ -1627,16 +1627,15 @@ var { 3: foo, 5: bar } = [0, 1, 2, 3, 4, 5, 6];
 "#,
     r#"
 var rect = {};
-var _topLeft = rect.topLeft,
-    x1 = _topLeft.x,
-    y1 = _topLeft.y,
-    _bottomRight = rect.bottomRight,
-    x2 = _bottomRight.x,
-    y2 = _bottomRight.y;
-var ref = [0, 1, 2, 3, 4, 5, 6],
-    foo = ref[3],
-    bar = ref[5];
-
+var _rect_topLeft = rect.topLeft,
+    x1 = _rect_topLeft.x,
+    y1 = _rect_topLeft.y,
+    _rect_bottomRight = rect.bottomRight,
+    x2 = _rect_bottomRight.x,
+    y2 = _rect_bottomRight.y;
+var _ref = [0, 1, 2, 3, 4, 5, 6],
+    foo = _ref[3],
+    bar = _ref[5];
 "#
 );
 
@@ -1705,13 +1704,12 @@ var {topLeft: [x1, y1], bottomRight: [x2, y2] } = rect;
     r#"
 var rect = {};
 
-var _topLeft = _slicedToArray(rect.topLeft, 2),
-    x1 = _topLeft[0],
-    y1 = _topLeft[1],
-    _bottomRight = _slicedToArray(rect.bottomRight, 2),
-    x2 = _bottomRight[0],
-    y2 = _bottomRight[1];
-
+var _rect_topLeft = _slicedToArray(rect.topLeft, 2),
+    x1 = _rect_topLeft[0],
+    y1 = _rect_topLeft[1],
+    _rect_bottomRight = _slicedToArray(rect.bottomRight, 2),
+    x2 = _rect_bottomRight[0],
+    y2 = _rect_bottomRight[1];
 "#
 );
 
@@ -1779,17 +1777,17 @@ var [a, [b], [c]] = ["hello", [", ", "junk"], ["world"]];
 "#,
     r#"
 var a = "hello",
-    ref = [", ", "junk"],
-    b = ref[0],
+    _ref = [", ", "junk"],
+    b = _ref[0],
     c = "world";
-var ref1, ref2;
+var ref, ref1;
     a = "hello",
-    ref1 = [", ", "junk"],
-    b = ref1[0],
-    ref1,
-    ref2 = ["world"],
-    c = ref2[0],
-    ref2;
+    ref = [", ", "junk"],
+    b = ref[0],
+    ref,
+    ref1 = ["world"],
+    c = ref1[0],
+    ref1;
 "#
 );
 
@@ -1854,14 +1852,14 @@ const {
     r#"
 var input = {};
 
-var key = prefix + 'state',
-    key1 = `${prefix}consents`,
+var _key = prefix + 'state',
+    _key1 = `${prefix}consents`,
     givenName = input.given_name,
     lastName = input['last_name'],
     country = input[`country`],
-    state = input[key],
-    consents = input[key1],
-    rest = _objectWithoutProperties(input, ["given_name", 'last_name', `country`, key, key1].map(_toPropertyKey));
+    state = input[_key],
+    consents = input[_key1],
+    rest = _objectWithoutProperties(input, ["given_name", 'last_name', `country`, _key, _key1].map(_toPropertyKey));
 
 
 "#
@@ -2030,7 +2028,7 @@ test!(
     const [ { a: a_ = 1 } ] = b
     ",
     "
-    const ref = b[0], tmp = ref.a, a_ = tmp === void 0 ? 1 : tmp;
+    const _b_ = b[0], tmp = _b_.a, a_ = tmp === void 0 ? 1 : tmp;
     "
 );
 
@@ -2045,7 +2043,8 @@ test!(
     ",
     "
     async function f(a, b) {
-        const ref = JSON.parse(b), ref1 = ref[0], tmp = ref1.a, a_ = tmp === void 0 ? 1 : tmp;
+        const _JSON_parse = JSON.parse(b), _JSON_parse_ = _JSON_parse[0], tmp = _JSON_parse_.a, a_ \
+     = tmp === void 0 ? 1 : tmp;
     }
     "
 );
@@ -2209,8 +2208,8 @@ test!(
         yield 2;
     }
     let bar = foo();
-    const ref = [,bar.next().value], tmp = ref[0],
-    x = tmp === void 0 ? bar.next().value : tmp, y = ref[1];
+    const _ref = [,bar.next().value], tmp = _ref[0],
+    x = tmp === void 0 ? bar.next().value : tmp, y = _ref[1];
     console.log(x, y);"
 );
 
@@ -2267,7 +2266,7 @@ test!(
     |_| tr(),
     issue_6304,
     "let [] = [];",
-    "let ref = [];"
+    "let _ref = [];"
 );
 
 test!(
@@ -2275,7 +2274,7 @@ test!(
     |_| tr(),
     issue_6304_1,
     "let [] = [,];",
-    "let ref = [,];"
+    "let _ref = [,];"
 );
 
 test!(
@@ -2283,5 +2282,5 @@ test!(
     |_| tr(),
     issue_6304_2,
     "let [] = [...[1, 2, 3]];",
-    "let ref = [...[1, 2, 3]];"
+    "let _ref = [...[1, 2, 3]];"
 );
diff --git a/crates/swc_ecma_transforms_compat/tests/es2015_parameters.rs b/crates/swc_ecma_transforms_compat/tests/es2015_parameters.rs
index c396d9a38892..a8a7dc1a3ef4 100644
--- a/crates/swc_ecma_transforms_compat/tests/es2015_parameters.rs
+++ b/crates/swc_ecma_transforms_compat/tests/es2015_parameters.rs
@@ -102,7 +102,7 @@ test!(
     default_before_last,
     r#"function foo({x,y} = "foo", b) {}"#,
     r#"function foo() {
-      var ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : "foo", x = ref.x, y = ref.y, b = arguments.length > 1 ? arguments[1] : void 0;
+      var _ref = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : "foo", x = _ref.x, y = _ref.y, b = arguments.length > 1 ? arguments[1] : void 0;
 }"#
 );
 
@@ -300,10 +300,10 @@ test!(
   a5,
   {a6, a7} = {}) {}"#,
     "function fn(a1) {
-    var a2 = arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : 4, ref = \
-     arguments.length > 2 ? arguments[2] : void 0, a3 = ref.a3, a4 = ref.a4, a5 = \
-     arguments.length > 3 ? arguments[3] : void 0, ref1 = arguments.length > 4 && arguments[4] \
-     !== void 0 ? arguments[4] : {}, a6 = ref1.a6, a7 = ref1.a7;
+    var a2 = arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : 4, _ref = \
+     arguments.length > 2 ? arguments[2] : void 0, a3 = _ref.a3, a4 = _ref.a4, a5 = \
+     arguments.length > 3 ? arguments[3] : void 0, _ref1 = arguments.length > 4 && arguments[4] \
+     !== void 0 ? arguments[4] : {}, a6 = _ref1.a6, a7 = _ref1.a7;
 }
 "
 );
@@ -421,14 +421,14 @@ set arr([x, y] = []) {
 };"#,
     "var obj = {
       set obj (param){
-        var ref = param === void 0 ? {} : param, a = ref.a, b = ref.b;
+        var _ref = param === void 0 ? {} : param, a = _ref.a, b = _ref.b;
         this.num = {
             a,
             b
         };
     },
     set arr (param){
-        var ref1 = _slicedToArray(param === void 0 ? [] : param, 2), x = ref1[0], y = ref1[1];
+        var _ref1 = _slicedToArray(param === void 0 ? [] : param, 2), x = _ref1[0], y = _ref1[1];
         this.num = {
             x,
             y
@@ -476,7 +476,7 @@ function t(x = "default", { a, b }, ...args) {
 }"#,
     r#"// #3861
 function t() {
-    var x = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : "default", ref = arguments.length > 1 ? arguments[1] : void 0, a = ref.a, b = ref.b;
+    var x = arguments.length > 0 && arguments[0] !== void 0 ? arguments[0] : "default", _ref = arguments.length > 1 ? arguments[1] : void 0, a = _ref.a, b = _ref.b;
     for(var _len = arguments.length, args = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++){
         args[_key - 2] = arguments[_key];
     }
@@ -1305,7 +1305,7 @@ test!(
     for(var _len = arguments.length, _tmp = new Array(_len), _key = 0; _key < _len; _key++){
         _tmp[_key] = arguments[_key];
     }
-    var __tmp = _slicedToArray(_tmp, 1), a = __tmp[0];
+    var _tmp1 = _slicedToArray(_tmp, 1), a = _tmp1[0];
 }"#
 );
 
@@ -2035,8 +2035,8 @@ test!(
     fn_len_complex_assign,
     "function test({a: b} = {}) {}",
     "function test(param) {
-      var ref = param === void 0 ? {} : param,
-          b = ref.a;
+      var _ref = param === void 0 ? {} : param,
+          b = _ref.a;
     }"
 );
 
@@ -2048,8 +2048,8 @@ test!(
     fn_len_default_array_destructuring,
     "function t([,,a] = [1,2,3]) { return a }",
     "function t(param) {
-      var ref = _slicedToArray(param === void 0 ? [1, 2, 3] : param, 3),
-          a = ref[2];
+      var _ref = _slicedToArray(param === void 0 ? [1, 2, 3] : param, 3),
+          a = _ref[2];
 
       return a;
     }"
@@ -2205,9 +2205,9 @@ test!(
       var a3 = param.a3,
           a4 = param.a4;
 
-      var ref = param1 === void 0 ? {} : param1,
-          a6 = ref.a6,
-          a7 = ref.a7;
+      var _ref = param1 === void 0 ? {} : param1,
+          a6 = _ref.a6,
+          a7 = _ref.a7;
     }
 "#
 );
diff --git a/crates/swc_ecma_transforms_compat/tests/es2015_spread.rs b/crates/swc_ecma_transforms_compat/tests/es2015_spread.rs
index e0d1366429ec..c780d9861166 100644
--- a/crates/swc_ecma_transforms_compat/tests/es2015_spread.rs
+++ b/crates/swc_ecma_transforms_compat/tests/es2015_spread.rs
@@ -250,8 +250,8 @@ var obj = {
 
 switch (true) {
   case true:
-    var _obj;
-    (_obj = obj.obj).fn.apply(_obj, _toConsumableArray(args));
+    var _obj_obj;
+    (_obj_obj = obj.obj).fn.apply(_obj_obj, _toConsumableArray(args));
 
     break;
 }
@@ -285,11 +285,11 @@ foob.test.add(foo, bar, ...numbers);
 
 "#,
     r#"
-var _foob, _test;
+var _foob, _foob_test;
 
 (_foob = foob).add.apply(_foob, [foo, bar].concat(_toConsumableArray(numbers)));
 
-(_test = foob.test).add.apply(_test, [foo, bar].concat(_toConsumableArray(numbers)));
+(_foob_test = foob.test).add.apply(_foob_test, [foo, bar].concat(_toConsumableArray(numbers)));
 
 "#
 );
@@ -592,9 +592,9 @@ foob.test.add(foo, bar, ...numbers);
 
 "#,
     r#"
-var _foob, _test;
+var _foob, _foob_test;
 (_foob = foob).add.apply(_foob, [foo, bar].concat(_toConsumableArray(numbers)));
-(_test = foob.test).add.apply(_test, [foo, bar].concat(_toConsumableArray(numbers)))
+(_foob_test = foob.test).add.apply(_foob_test, [foo, bar].concat(_toConsumableArray(numbers)))
 "#
 );
 
@@ -728,9 +728,9 @@ foob.test.add(...numbers);
 
 "#,
     r#"
-var _foob, _test;
+var _foob, _foob_test;
 (_foob = foob).add.apply(_foob, _toConsumableArray(numbers));
-(_test = foob.test).add.apply(_test, _toConsumableArray(numbers));
+(_foob_test = foob.test).add.apply(_foob_test, _toConsumableArray(numbers));
 "#
 );
 
diff --git a/crates/swc_ecma_transforms_compat/tests/es2017_async_to_generator.rs b/crates/swc_ecma_transforms_compat/tests/es2017_async_to_generator.rs
index c7cffaa43331..f814deb42eac 100644
--- a/crates/swc_ecma_transforms_compat/tests/es2017_async_to_generator.rs
+++ b/crates/swc_ecma_transforms_compat/tests/es2017_async_to_generator.rs
@@ -142,7 +142,7 @@ function foo(param) {
 }
 function _foo() {
     _foo = _asyncToGenerator(function*(param) {
-        let a = param.a, _b = param.b, b = _b === void 0 ? mandatory("b") : _b;
+        let a = param.a, _param_b = param.b, b = _param_b === void 0 ? mandatory("b") : _param_b;
         return Promise.resolve(b);
     });
     return _foo.apply(this, arguments);
@@ -1485,8 +1485,8 @@ function foo(_) {
 function _foo() {
   _foo = _asyncToGenerator(function* (param) {
     let a = param.a,
-        _b = param.b,
-        b = _b === void 0 ? mandatory("b") : _b;
+        _param_b = param.b,
+        b = _param_b === void 0 ? mandatory("b") : _param_b;
     return Promise.resolve(b);
   });
   return _foo.apply(this, arguments);
diff --git a/crates/swc_ecma_transforms_compat/tests/es2018_object_rest_spread.rs b/crates/swc_ecma_transforms_compat/tests/es2018_object_rest_spread.rs
index 3c66de619eec..55324ca2ae4a 100644
--- a/crates/swc_ecma_transforms_compat/tests/es2018_object_rest_spread.rs
+++ b/crates/swc_ecma_transforms_compat/tests/es2018_object_rest_spread.rs
@@ -282,18 +282,18 @@ for (var _ref of []) {
 }
 
 for (var _ref1 of []) {
-  var __ref;
-  __ref = _ref1, b = _objectWithoutProperties(__ref, [
+  var _ref2;
+  _ref2 = _ref1, b = _objectWithoutProperties(_ref2, [
       "a"
-  ]), ({ a  } = __ref), __ref;
+  ]), ({ a  } = _ref2), _ref2;
 }
 
 async function a() {
   for await (var _ref of []) {
-      var __ref;
-      __ref = _ref, b = _objectWithoutProperties(__ref, [
+      var _ref1;
+      _ref1 = _ref, b = _objectWithoutProperties(_ref1, [
           "a"
-      ]), ({ a  } = __ref), __ref;
+      ]), ({ a  } = _ref1), _ref1;
   }
 } // skip
 
@@ -498,15 +498,15 @@ const {
     r#"
 var _tmp;
 const _ref = {
-}, key = (_param)=>{
+}, _key = (_param)=>{
     var rest = _extends({
     }, _param);
     let b = _extends({
     }, {
     });
-}, key1 = (_tmp = {
+}, _key1 = (_tmp = {
 }, d = _extends({
-}, _tmp), _tmp), { [key]: a , [key1]: c  } = _ref;
+}, _tmp), _tmp), { [_key]: a , [_key1]: c  } = _ref;
 
 "#
 );
@@ -1660,16 +1660,15 @@ const s = _extends({}, r),
       t = foo(s); // ordering is preserved
 
 var l = foo(),
-    _ref = bar(),
+    _bar = bar(),
     {
   m: {
     n
   }
-} = _ref,
-    o = _objectWithoutProperties(_ref.m, ["n"]),
-    p = _objectWithoutProperties(_ref, ["m"]),
+} = _bar,
+    o = _objectWithoutProperties(_bar.m, ["n"]),
+    p = _objectWithoutProperties(_bar, ["m"]),
     q = baz();
-
 "#
 );
 
@@ -2736,14 +2735,12 @@ const { a } = foo(({ b, ...c }) => {
 
 "#,
     r#"
-const _ref = foo(), { s  } = _ref, t = _objectWithoutProperties(_ref, ["s"]);
-const _ref1 = bar(), { s: { q1  }  } = _ref1, q2 = _objectWithoutProperties(_ref1.s, ["q1"]), q3 = _objectWithoutProperties(_ref1, ["s"]);
-const _ref2 = foo((_param)=>{
+const _foo = foo(), { s  } = _foo, t = _objectWithoutProperties(_foo, ["s"]);
+const _bar = bar(), { s: { q1  }  } = _bar, q2 = _objectWithoutProperties(_bar.s, ["q1"]), q3 = _objectWithoutProperties(_bar, ["s"]);
+const _foo1 = foo((_param)=>{
     var { b  } = _param, c = _objectWithoutProperties(_param, ["b"]);
     console.log(b, c);
-}), { a  } = _ref2;
-
-
+}), { a  } = _foo1;
 "#
 );
 
@@ -3048,8 +3045,8 @@ test!(
     var src = {};
     var counter = 0;
     for (var _ref of [{ x: 1, y: 2 }]) {
-        var __ref;
-        __ref = _ref, src.y = _extends({}, __ref), __ref;
+        var _ref1;
+        _ref1 = _ref, src.y = _extends({}, _ref1), _ref1;
         expect(src.y.x).toEqual(1);
         expect(src.y.y).toEqual(2);
 
diff --git a/crates/swc_ecma_transforms_compat/src/es2020/nullish_coalescing/tests.rs b/crates/swc_ecma_transforms_compat/tests/es2020_nullish_coalescing.rs
similarity index 77%
rename from crates/swc_ecma_transforms_compat/src/es2020/nullish_coalescing/tests.rs
rename to crates/swc_ecma_transforms_compat/tests/es2020_nullish_coalescing.rs
index 13a3c615c3f6..ea46fd43b757 100644
--- a/crates/swc_ecma_transforms_compat/src/es2020/nullish_coalescing/tests.rs
+++ b/crates/swc_ecma_transforms_compat/tests/es2020_nullish_coalescing.rs
@@ -1,7 +1,7 @@
 use swc_ecma_parser::{EsConfig, Syntax};
+use swc_ecma_transforms_compat::es2020::nullish_coalescing::{nullish_coalescing, Config};
 use swc_ecma_transforms_testing::{test, test_exec};
-
-use super::*;
+use swc_ecma_visit::Fold;
 
 fn tr(c: Config) -> impl Fold {
     nullish_coalescing(c)
@@ -48,9 +48,8 @@ test!(
  function foo(foo, qux = foo.bar ?? "qux") {}
 "#,
     r#"
-var _bar;
-function foo(foo, qux = (_bar = foo.bar) !== null && _bar !== void 0 ? _bar : "qux") {
-}
+var _foo_bar;
+function foo(foo, qux = (_foo_bar = foo.bar) !== null && _foo_bar !== void 0 ? _foo_bar : "qux") {}
 "#
 );
 
@@ -66,9 +65,9 @@ function foo(opts) {
 "#,
     r#"
 function foo(opts) {
-  var _foo;
+  var _opts_foo;
 
-  var foo = (_foo = opts.foo) !== null && _foo !== void 0 ? _foo : "default";
+  var foo = (_opts_foo = opts.foo) !== null && _opts_foo !== void 0 ? _opts_foo : "default";
 }
 "#
 );
@@ -100,8 +99,8 @@ function foo() {
 "#,
     r#"
 function foo() {
-    var ref;
-    var foo = (ref = this) !== null && ref !== void 0 ? ref : {
+    var _this;
+    var foo = (_this = this) !== null && _this !== void 0 ? _this : {
     };
 }
 
@@ -131,8 +130,8 @@ test!(
     "
     const a = {
     };
-    var _b;
-    _b = (_b = a.b) !== null && _b !== void 0 ? _b : a.b = '1';
+    var _a_b;
+    _a_b = (_a_b = a.b) !== null && _a_b !== void 0 ? _a_b : a.b = '1';
     "
 );
 
@@ -160,9 +159,9 @@ function foo(opts) {
 "#,
     r#"
 function foo(opts) {
-  var _foo;
+  var _opts_foo;
 
-  var foo = (_foo = opts.foo) != null ? _foo : "default";
+  var foo = (_opts_foo = opts.foo) != null ? _opts_foo : "default";
 }
 "#
 );
@@ -173,7 +172,7 @@ test!(
     issue_6328,
     "switch ( 0 ) { case 0 ?? 0 : }",
     r#"
-    var ref;
-    switch ( 0 ) { case (ref = 0) !== null && ref !== void 0 ? ref : 0: }
+    var _ref;
+    switch ( 0 ) { case (_ref = 0) !== null && _ref !== void 0 ? _ref : 0: }
 "#
 );
diff --git a/crates/swc_ecma_transforms_compat/tests/es2020_optional_chaining.rs b/crates/swc_ecma_transforms_compat/tests/es2020_optional_chaining.rs
index c85470925e5b..cf4f48943b93 100644
--- a/crates/swc_ecma_transforms_compat/tests/es2020_optional_chaining.rs
+++ b/crates/swc_ecma_transforms_compat/tests/es2020_optional_chaining.rs
@@ -60,23 +60,22 @@ function test(foo) {
 "use strict";
 
 function test(foo) {
-  var ref, ref1, ref2, ref3, _obj, ref4, _obj1, ref5, ref6, ref7, ref8, ref9;
-
+  var _foo_bar, _foo_get, _foo_bar1, _foo_bar2, _foo_bar3, _foo_bar_baz, _foo_bar4, _foo_bar_baz1, _foo_bar5, _foo_bar6, _foo_bar7, _foo_bar8;
   foo == null ? void 0 : foo.bar;
-  foo == null ? void 0 : (ref = foo.bar) == null ? void 0 : ref.baz;
+  foo == null ? void 0 : (_foo_bar = foo.bar) == null ? void 0 : _foo_bar.baz;
   foo == null ? void 0 : foo(foo);
   foo == null ? void 0 : foo.bar();
-  (ref1 = foo.get(bar)) == null ? void 0 : ref1();
-  (ref2 = foo.bar()) == null ? void 0 : ref2();
-  (ref3 = foo[bar]()) == null ? void 0 : ref3();
-  (ref4 = (_obj = foo.bar()).baz) == null ? void 0 : ref4.call(_obj);
-  (ref5 = (_obj1 = foo[bar]()).baz) == null ? void 0 : ref5.call(_obj1);
+  (_foo_get = foo.get(bar)) == null ? void 0 : _foo_get();
+  (_foo_bar1 = foo.bar()) == null ? void 0 : _foo_bar1();
+  (_foo_bar2 = foo[bar]()) == null ? void 0 : _foo_bar2();
+  (_foo_bar_baz = (_foo_bar3 = foo.bar()).baz) == null ? void 0 : _foo_bar_baz.call(_foo_bar3);
+  (_foo_bar_baz1 = (_foo_bar4 = foo[bar]()).baz) == null ? void 0 : _foo_bar_baz1.call(_foo_bar4);
   foo.bar == null ? void 0 : foo.bar(foo.bar, false);
   foo == null ? void 0 : foo.bar == null ? void 0 : foo.bar(foo.bar, true);
-  (ref6 = foo.bar) == null ? void 0 : ref6.baz(foo.bar, false);
-  foo == null ? void 0 : (ref7 = foo.bar) == null ? void 0 : ref7.baz(foo.bar, true);
-  (ref8 = foo.bar) == null ? void 0 : ref8.baz == null ? void 0 : ref8.baz(foo.bar, false);
-  foo == null ? void 0 : (ref9 = foo.bar) == null ? void 0 : ref9.baz == null ? void 0 : ref9.baz(foo.bar, true);
+  (_foo_bar5 = foo.bar) == null ? void 0 : _foo_bar5.baz(foo.bar, false);
+  foo == null ? void 0 : (_foo_bar6 = foo.bar) == null ? void 0 : _foo_bar6.baz(foo.bar, true);
+  (_foo_bar7 = foo.bar) == null ? void 0 : _foo_bar7.baz == null ? void 0 : _foo_bar7.baz(foo.bar, false);
+  foo == null ? void 0 : (_foo_bar8 = foo.bar) == null ? void 0 : _foo_bar8.baz == null ? void 0 : _foo_bar8.baz(foo.bar, true);
 }
 "#
 );
@@ -119,10 +118,10 @@ eval?.("console.log()");
 window.eval?.("console.log()");
 "#,
     r#"
-var ref;
+var _window_eval;
 eval === null || eval === void 0 ? void 0 : (0, eval)();
 eval === null || eval === void 0 ? void 0 : (0, eval)("console.log()");
-(ref = window.eval) === null || ref === void 0 ? void 0 : ref.call(window, "console.log()");
+(_window_eval = window.eval) === null || _window_eval === void 0 ? void 0 : _window_eval.call(window, "console.log()");
 "#
 );
 
@@ -284,23 +283,21 @@ val = obj?.a?.b;
     r#"
 "use strict";
 
-var ref, ref1, ref2;
-
+var _obj_a, _obj_b, _obj_a1;
 const obj = {
-  a: {
-    b: {
-      c: {
-        d: 2
-      }
+    a: {
+        b: {
+            c: {
+                d: 2
+            }
+        }
     }
-  }
 };
 const a = obj === null || obj === void 0 ? void 0 : obj.a;
-const b = obj === null || obj === void 0 ? void 0 : (ref = obj.a) === null || ref === void 0 ? void 0 : ref.b;
-const bad = obj === null || obj === void 0 ? void 0 : (ref1 = obj.b) === null || ref1 === void 0 ? void 0 : ref1.b;
+const b = obj === null || obj === void 0 ? void 0 : (_obj_a = obj.a) === null || _obj_a === void 0 ? void 0 : _obj_a.b;
+const bad = obj === null || obj === void 0 ? void 0 : (_obj_b = obj.b) === null || _obj_b === void 0 ? void 0 : _obj_b.b;
 let val;
-val = obj === null || obj === void 0 ? void 0 : (ref2 = obj.a) === null || ref2 === void 0 ? void 0 : ref2.b;
-
+val = obj === null || obj === void 0 ? void 0 : (_obj_a1 = obj.a) === null || _obj_a1 === void 0 ? void 0 : _obj_a1.b;
 "#
 );
 
@@ -335,17 +332,17 @@ function test(foo) {
 "#,
     r#"
 function test(foo) {
-    var ref, ref1, ref2, ref3, ref4, ref5, ref6, ref7, ref8;
+    var _foo_bar, _foo_bar1, _foo_bar2, _foo_bar3, _foo_bar4, _foo_bar5, _foo_bar_baz, _foo_bar6, _foo_bar_baz1;
     foo === null || foo === void 0 ? void 0 : foo.bar;
-    foo === null || foo === void 0 ? void 0 : (ref = foo.bar) === null || ref === void 0 ? void 0 : ref.baz;
+    foo === null || foo === void 0 ? void 0 : (_foo_bar = foo.bar) === null || _foo_bar === void 0 ? void 0 : _foo_bar.baz;
     foo === null || foo === void 0 ? void 0 : foo(foo);
     foo === null || foo === void 0 ? void 0 : foo.bar();
-    (ref1 = foo.bar) === null || ref1 === void 0 ? void 0 : ref1.call(foo, foo.bar, false);
-    foo === null || foo === void 0 ? void 0 : (ref2 = foo.bar) === null || ref2 === void 0 ? void 0 : ref2.call(foo, foo.bar, true);
-    (ref3 = foo.bar) === null || ref3 === void 0 ? void 0 : ref3.baz(foo.bar, false);
-    foo === null || foo === void 0 ? void 0 : (ref4 = foo.bar) === null || ref4 === void 0 ? void 0 : ref4.baz(foo.bar, true);
-    (ref5 = foo.bar) === null || ref5 === void 0 ? void 0 : (ref6 = ref5.baz) === null || ref6 === void 0 ? void 0 : ref6.call(ref5, foo.bar, false);
-    foo === null || foo === void 0 ? void 0 : (ref7 = foo.bar) === null || ref7 === void 0 ? void 0 : (ref8 = ref7.baz) === null || ref8 === void 0 ? void 0 : ref8.call(ref7, foo.bar, true);
+    (_foo_bar1 = foo.bar) === null || _foo_bar1 === void 0 ? void 0 : _foo_bar1.call(foo, foo.bar, false);
+    foo === null || foo === void 0 ? void 0 : (_foo_bar2 = foo.bar) === null || _foo_bar2 === void 0 ? void 0 : _foo_bar2.call(foo, foo.bar, true);
+    (_foo_bar3 = foo.bar) === null || _foo_bar3 === void 0 ? void 0 : _foo_bar3.baz(foo.bar, false);
+    foo === null || foo === void 0 ? void 0 : (_foo_bar4 = foo.bar) === null || _foo_bar4 === void 0 ? void 0 : _foo_bar4.baz(foo.bar, true);
+    (_foo_bar5 = foo.bar) === null || _foo_bar5 === void 0 ? void 0 : (_foo_bar_baz = _foo_bar5.baz) === null || _foo_bar_baz === void 0 ? void 0 : _foo_bar_baz.call(_foo_bar5, foo.bar, false);
+    foo === null || foo === void 0 ? void 0 : (_foo_bar6 = foo.bar) === null || _foo_bar6 === void 0 ? void 0 : (_foo_bar_baz1 = _foo_bar6.baz) === null || _foo_bar_baz1 === void 0 ? void 0 : _foo_bar_baz1.call(_foo_bar6, foo.bar, true);
 }
 "#
 );
@@ -362,16 +359,13 @@ street = user.address?.street
 test(a?.b,  1);
 
 (a?.b, 2);
-
 "#,
     r#"
-var ref, ref1;
-
-var street = (ref = user.address) === null || ref === void 0 ? void 0 : ref.street;
-street = (ref1 = user.address) === null || ref1 === void 0 ? void 0 : ref1.street;
+var _user_address, _user_address1;
+var street = (_user_address = user.address) === null || _user_address === void 0 ? void 0 : _user_address.street;
+street = (_user_address1 = user.address) === null || _user_address1 === void 0 ? void 0 : _user_address1.street;
 test(a === null || a === void 0 ? void 0 : a.b, 1);
 a === null || a === void 0 ? void 0 : a.b, 2;
-
 "#
 );
 
@@ -439,17 +433,17 @@ orders[client.key]?.price;
 
 "#,
     r#"
-var ref, ref1, ref2, ref3, ref4, ref5, ref6, ref7;
+var _ref, _a_b, _ref1, _a_b_c, _a_b_c_d, _orders_, _orders_client_key, _c;
 foo === null || foo === void 0 ? void 0 : foo.bar;
-(ref = a === null || a === void 0 ? void 0 : a.b.c) === null || ref === void 0 ? void 0 : ref.d.e;
-(ref2 = (ref1 = a.b) === null || ref1 === void 0 ? void 0 : ref1.c.d) === null || ref2 === void 0 ? void 0 : ref2.e;
-(ref3 = a.b.c) === null || ref3 === void 0 ? void 0 : (ref4 = ref3.d) === null || ref4 === void 0 ? void 0 : ref4.e;
+(_ref = a === null || a === void 0 ? void 0 : a.b.c) === null || _ref === void 0 ? void 0 : _ref.d.e;
+(_ref1 = (_a_b = a.b) === null || _a_b === void 0 ? void 0 : _a_b.c.d) === null || _ref1 === void 0 ? void 0 : _ref1.e;
+(_a_b_c = a.b.c) === null || _a_b_c === void 0 ? void 0 : (_a_b_c_d = _a_b_c.d) === null || _a_b_c_d === void 0 ? void 0 : _a_b_c_d.e;
 orders === null || orders === void 0 ? void 0 : orders[0].price;
-orders === null || orders === void 0 ? void 0 : (ref5 = orders[0]) === null || ref5 === void 0 ? void 0 : ref5.price;
+orders === null || orders === void 0 ? void 0 : (_orders_ = orders[0]) === null || _orders_ === void 0 ? void 0 : _orders_.price;
 orders[client === null || client === void 0 ? void 0 : client.key].price;
-(ref6 = orders[client.key]) === null || ref6 === void 0 ? void 0 : ref6.price;
+(_orders_client_key = orders[client.key]) === null || _orders_client_key === void 0 ? void 0 : _orders_client_key.price;
 (0, a === null || a === void 0 ? void 0 : a.b).c;
-(0, (ref7 = (0, a === null || a === void 0 ? void 0 : a.b).c) === null || ref7 === void 0 ? void 0 : ref7.d).e;
+(0, (_c = (0, a === null || a === void 0 ? void 0 : a.b).c) === null || _c === void 0 ? void 0 : _c.d).e;
 "#
 );
 
@@ -479,18 +473,16 @@ test = +obj?.b?.b;
     r#"
 "use strict";
 
-var ref, ref1, ref2;
-
+var _obj_a, _obj_b, _obj_b1;
 const obj = {
-  a: {
-    b: 0
-  }
+    a: {
+        b: 0
+    }
 };
-let test = +(obj === null || obj === void 0 ? void 0 : (ref = obj.a) === null || ref === void 0 ? void 0 : ref.b);
+let test = +(obj === null || obj === void 0 ? void 0 : (_obj_a = obj.a) === null || _obj_a === void 0 ? void 0 : _obj_a.b);
 test = +(obj === null || obj === void 0 ? void 0 : obj.a.b);
-test = +(obj === null || obj === void 0 ? void 0 : (ref1 = obj.b) === null || ref1 === void 0 ? void 0 : ref1.b);
-test = +(obj === null || obj === void 0 ? void 0 : (ref2 = obj.b) === null || ref2 === void 0 ? void 0 : ref2.b);
-
+test = +(obj === null || obj === void 0 ? void 0 : (_obj_b = obj.b) === null || _obj_b === void 0 ? void 0 : _obj_b.b);
+test = +(obj === null || obj === void 0 ? void 0 : (_obj_b1 = obj.b) === null || _obj_b1 === void 0 ? void 0 : _obj_b1.b);
 "#
 );
 
@@ -526,18 +518,19 @@ foo?.bar()?.()
 
 "#,
     r#"
-var ref, ref1, ref2, ref3, ref4, ref5, ref6, ref7, ref8, ref9;
+var _foo_bar, _foo_bar1, _foo, _foo_bar2, _foo_bar3, _foo_bar_call, _foo_bar4, _foo_bar5, _foo_bar_call1, _ref;
 foo === null || foo === void 0 ? void 0 : foo(foo);
 foo === null || foo === void 0 ? void 0 : foo.bar();
-(ref = foo.bar) === null || ref === void 0 ? void 0 : ref.call(foo, foo.bar, false);
-foo === null || foo === void 0 ? void 0 : (ref1 = foo.bar) === null || ref1 === void 0 ? void 0 : ref1.call(foo, foo.bar, true);
+(_foo_bar = foo.bar) === null || _foo_bar === void 0 ? void 0 : _foo_bar.call(foo, foo.bar, false);
+foo === null || foo === void 0 ? void 0 : (_foo_bar1 = foo.bar) === null || _foo_bar1 === void 0 ? void 0 : _foo_bar1.call(foo, foo.bar, true);
 foo === null || foo === void 0 ? void 0 : foo().bar;
-foo === null || foo === void 0 ? void 0 : (ref2 = foo()) === null || ref2 === void 0 ? void 0 : ref2.bar;
-(ref3 = foo.bar) === null || ref3 === void 0 ? void 0 : ref3.call(foo).baz;
-(ref4 = foo.bar) === null || ref4 === void 0 ? void 0 : (ref5 = ref4.call(foo)) === null || ref5 === void 0 ? void 0 : ref5.baz;
-foo === null || foo === void 0 ? void 0 : (ref6 = foo.bar) === null || ref6 === void 0 ? void 0 : ref6.call(foo).baz;
-foo === null || foo === void 0 ? void 0 : (ref7 = foo.bar) === null || ref7 === void 0 ? void 0 : (ref8 = ref7.call(foo)) === null || ref8 === void 0 ? void 0 : ref8.baz;
-(ref9 = foo === null || foo === void 0 ? void 0 : foo.bar()) === null || ref9 === void 0 ? void 0 : ref9();"#
+foo === null || foo === void 0 ? void 0 : (_foo = foo()) === null || _foo === void 0 ? void 0 : _foo.bar;
+(_foo_bar2 = foo.bar) === null || _foo_bar2 === void 0 ? void 0 : _foo_bar2.call(foo).baz;
+(_foo_bar3 = foo.bar) === null || _foo_bar3 === void 0 ? void 0 : (_foo_bar_call = _foo_bar3.call(foo)) === null || _foo_bar_call === void 0 ? void 0 : _foo_bar_call.baz;
+foo === null || foo === void 0 ? void 0 : (_foo_bar4 = foo.bar) === null || _foo_bar4 === void 0 ? void 0 : _foo_bar4.call(foo).baz;
+foo === null || foo === void 0 ? void 0 : (_foo_bar5 = foo.bar) === null || _foo_bar5 === void 0 ? void 0 : (_foo_bar_call1 = _foo_bar5.call(foo)) === null || _foo_bar_call1 === void 0 ? void 0 : _foo_bar_call1.baz;
+(_ref = foo === null || foo === void 0 ? void 0 : foo.bar()) === null || _ref === void 0 ? void 0 : _ref();
+"#
 );
 
 // general_unary_exec
@@ -605,18 +598,16 @@ delete obj?.a;
     r#"
 "use strict";
 
-var ref, ref1;
-
+var _obj_a, _obj_b;
 const obj = {
-  a: {
-    b: 0
-  }
+    a: {
+        b: 0
+    }
 };
-let test = obj === null || obj === void 0 ? void 0 : (ref = obj.a) === null || ref === void 0 ? void 0 : delete ref.b;
+let test = obj === null || obj === void 0 ? void 0 : (_obj_a = obj.a) === null || _obj_a === void 0 ? void 0 : delete _obj_a.b;
 test = obj === null || obj === void 0 ? void 0 : delete obj.a.b;
-test = obj === null || obj === void 0 ? void 0 : (ref1 = obj.b) === null || ref1 === void 0 ? void 0 : delete ref1.b;
+test = obj === null || obj === void 0 ? void 0 : (_obj_b = obj.b) === null || _obj_b === void 0 ? void 0 : delete _obj_b.b;
 obj === null || obj === void 0 ? void 0 : delete obj.a;
-
 "#
 );
 
@@ -699,16 +690,13 @@ class Base {
   method() {
     return 'Hello!';
   }
-
 }
 
 class Derived extends Base {
   method() {
-    var ref;
-
-    return (ref = super.method) === null || ref === void 0 ? void 0 : ref.call(this);
+    var _super_method;
+    return (_super_method = super.method) === null || _super_method === void 0 ? void 0 : _super_method.call(this);
   }
-
 }
 
 "#
@@ -727,9 +715,9 @@ test!(
     |_| tr(Default::default()),
     simple_2,
     "obj?.a?.b",
-    "var ref;
-obj === null || obj === void 0 ? void 0 : (ref = obj.a) === null || ref === void 0 ? void 0 : \
-     ref.b;"
+    "var _obj_a;
+    obj === null || obj === void 0 ? void 0 : (_obj_a = obj.a) === null || _obj_a === void 0 ? \
+     void 0 : _obj_a.b;"
 );
 
 test!(
@@ -737,9 +725,9 @@ test!(
     |_| tr(Default::default()),
     simple_3,
     "obj?.a?.b.c",
-    "var ref;
-obj === null || obj === void 0 ? void 0 : (ref = obj.a) === null || ref === void 0 ? void 0 : \
-     ref.b.c;"
+    "var _obj_a;
+    obj === null || obj === void 0 ? void 0 : (_obj_a = obj.a) === null || _obj_a === void 0 ? \
+     void 0 : _obj_a.b.c;"
 );
 
 test!(
@@ -747,9 +735,9 @@ test!(
     |_| tr(Default::default()),
     call_1,
     "obj?.a?.b()",
-    "var ref;
-obj === null || obj === void 0 ? void 0 : (ref = obj.a) === null || ref === void 0 ? void 0 : \
-     ref.b();",
+    "var _obj_a;
+    obj === null || obj === void 0 ? void 0 : (_obj_a = obj.a) === null || _obj_a === void 0 ? \
+     void 0 : _obj_a.b();",
     ok_if_code_eq
 );
 
@@ -758,15 +746,10 @@ test!(
     |_| tr(Default::default()),
     call_2,
     "a?.b?.c?.()",
-    "var ref, ref1;
-
-a === null || a === void 0
-  ? void 0
-  : (ref = a.b) === null || ref === void 0
-    ? void 0
-    : (ref1 = ref.c) === null || ref1 === void 0
-      ? void 0
-      : ref1.call(ref);"
+    "var _a_b, _a_b_c;
+
+    a === null || a === void 0 ? void 0 : (_a_b = a.b) === null || _a_b === void 0 ? void 0 : \
+     (_a_b_c = _a_b.c) === null || _a_b_c === void 0 ? void 0 : _a_b_c.call(_a_b);"
 );
 
 test!(
@@ -774,8 +757,8 @@ test!(
     |_| tr(Default::default()),
     issue_732_1,
     "test.a?.b.c.d",
-    "var ref;
-(ref = test.a) === null || ref === void 0 ? void 0 : ref.b.c.d"
+    "var _test_a;
+    (_test_a = test.a) === null || _test_a === void 0 ? void 0 : _test_a.b.c.d;"
 );
 
 test!(
@@ -783,8 +766,8 @@ test!(
     |_| tr(Default::default()),
     issue_732_2,
     "test.a?.b.c",
-    "var ref;
-(ref = test.a) === null || ref === void 0 ? void 0 : ref.b.c;"
+    "var _test_a;
+    (_test_a = test.a) === null || _test_a === void 0 ? void 0 : _test_a.b.c;"
 );
 
 test!(
@@ -792,8 +775,8 @@ test!(
     |_| tr(Default::default()),
     issue_732_3,
     "test.a?.b.c.d.e.f.g.h.i",
-    "var ref;
-(ref = test.a) === null || ref === void 0 ? void 0 : ref.b.c.d.e.f.g.h.i"
+    "var _test_a;
+    (_test_a = test.a) === null || _test_a === void 0 ? void 0 : _test_a.b.c.d.e.f.g.h.i;"
 );
 
 // https://github.com/Brooooooklyn/swc-node/issues/62
@@ -802,8 +785,8 @@ test!(
     |_| tr(Default::default()),
     swc_node_issue_62,
     "a.focus?.()",
-    "var ref;
-    (ref = a.focus) === null || ref === void 0 ? void 0 : ref.call(a);"
+    "var _a_focus;
+    (_a_focus = a.focus) === null || _a_focus === void 0 ? void 0 : _a_focus.call(a);"
 );
 
 test!(
@@ -851,9 +834,10 @@ test!(
 obj?.a?.b?.c()
 ",
     "
-    var ref, ref1;
-obj === null || obj === void 0 ? void 0 : (ref = obj.a) === null || ref === void 0 ? void 0 : \
-     (ref1 = ref.b) === null || ref1 === void 0 ? void 0 : ref1.c();"
+var _obj_a, _obj_a_b;
+obj === null || obj === void 0 ? void 0 : (_obj_a = obj.a) === null || _obj_a === void 0 ? void 0 \
+     : (_obj_a_b = _obj_a.b) === null || _obj_a_b === void 0 ? void 0 : _obj_a_b.c();
+"
 );
 
 test!(
@@ -864,9 +848,10 @@ test!(
 expect(obj?.a?.b?.c()).toBe(2)
 ",
     "
-  var ref, ref1;
-expect(obj === null || obj === void 0 ? void 0 : (ref = obj.a) === null || ref === void 0 ? void 0 \
-     : (ref1 = ref.b) === null || ref1 === void 0 ? void 0 : ref1.c()).toBe(2);
+var _obj_a, _obj_a_b;
+expect(obj === null || obj === void 0 ? void 0 : (_obj_a = obj.a) === null || _obj_a === void 0 ? \
+     void 0 : (_obj_a_b = _obj_a.b) === null || _obj_a_b === void 0 ? void 0 : \
+     _obj_a_b.c()).toBe(2);
 "
 );
 
@@ -923,10 +908,10 @@ test!(
     const patch = PATCHES.get(ident)?.();
     "#,
     r#"
-    var ref;
+    var _PATCHES_get;
     const PATCHES = new Map();
     const ident = 'foo';
-    const patch = (ref = PATCHES.get(ident)) === null || ref === void 0 ? void 0 : ref();
+    const patch = (_PATCHES_get = PATCHES.get(ident)) === null || _PATCHES_get === void 0 ? void 0 : _PATCHES_get();
     "#
 );
 
@@ -936,8 +921,8 @@ test!(
     pr_2791,
     r#"UNCONFIRMED_CALLBACK_MAP.get(pid)?.(error, response)"#,
     r#"
-var ref;
-(ref = UNCONFIRMED_CALLBACK_MAP.get(pid)) === null || ref === void 0 ? void 0 : ref(error, response)
+var _UNCONFIRMED_CALLBACK_MAP_get;
+(_UNCONFIRMED_CALLBACK_MAP_get = UNCONFIRMED_CALLBACK_MAP.get(pid)) === null || _UNCONFIRMED_CALLBACK_MAP_get === void 0 ? void 0 : _UNCONFIRMED_CALLBACK_MAP_get(error, response);
   "#
 );
 
@@ -954,13 +939,13 @@ test!(
     ",
     "
     function bug() {
-        const arrowFn = (arg)=>{
-            var _object, ref;
-            return (ref = (_object = this.object)[arg]) === null || ref === void 0 ? void 0 : \
-     ref.call(_object);
-        };
+      const arrowFn = (arg)=>{
+          var _this_object, _this_object_arg;
+          return (_this_object_arg = (_this_object = this.object)[arg]) === null || \
+     _this_object_arg === void 0 ? void 0 : _this_object_arg.call(_this_object)
+      };
     }
-    bug();
+    bug();  
     "
 );
 
diff --git a/crates/swc_ecma_transforms_compat/tests/es2022_class_properties.rs b/crates/swc_ecma_transforms_compat/tests/es2022_class_properties.rs
index bc37f6317c96..b8e944e99388 100644
--- a/crates/swc_ecma_transforms_compat/tests/es2022_class_properties.rs
+++ b/crates/swc_ecma_transforms_compat/tests/es2022_class_properties.rs
@@ -1037,20 +1037,20 @@ var foo = "foo";
 var bar = ()=>{
 };
 var four = 4;
-var _ref = one(),
-    _ref1 = 2 * 4 + 7,
-    _ref2 = 2 * four + 7,
-    _ref3 = 2 * four + seven,
+var _one = one(),
+    _ref = 2 * 4 + 7,
+    _ref1 = 2 * four + 7,
+    _ref2 = 2 * four + seven,
     _undefined = undefined,
-    _ref4 = void 0,
-    tmp = computed(),
-    tmp1 = computed(),
-    tmp2 = "test" + one,
-    _ref5 = /regex/,
+    _ref3 = void 0,
+    _computed = computed(),
+    _computed1 = computed(),
+    _tmp = "test" + one,
+    _ref4 = /regex/,
     _foo = foo,
     _bar = bar,
     _baz = baz,
-    _ref6 = `template${expression}`;
+    _ref5 = `template${expression}`;
 
 
 var MyClass = function() {
@@ -1059,13 +1059,13 @@ var MyClass = function() {
         _classCallCheck(this, MyClass);
         _defineProperty(this, null, "null");
         _defineProperty(this, _undefined, "undefined");
-        _defineProperty(this, _ref4, "void 0");
-        _defineProperty(this, _ref5, "regex");
+        _defineProperty(this, _ref3, "void 0");
+        _defineProperty(this, _ref4, "regex");
         _defineProperty(this, _foo, "foo");
         _defineProperty(this, _bar, "bar");
         _defineProperty(this, _baz, "baz");
         _defineProperty(this, `template`, "template");
-        _defineProperty(this, _ref6, "template-with-expression");
+        _defineProperty(this, _ref5, "template-with-expression");
     }
     _createClass(MyClass, [{
              key: "whatever", get: function () {
@@ -1074,13 +1074,13 @@ var MyClass = function() {
              key: "whatever", set: function (value) {
                 }
         }, {
-             key: tmp, get: function () {
+             key: _computed, get: function () {
                 }
         }, {
-             key: tmp1, set: function (value) {
+             key: _computed1, set: function (value) {
                 }
         }, {
-             key: tmp2, value: function () {
+             key: _tmp, value: function () {
                 }
         }], [{
              key: 10, value: function () {
@@ -1088,11 +1088,10 @@ var MyClass = function() {
         }]);
     return MyClass;
 }();
-_defineProperty(MyClass, _ref, "test");
+_defineProperty(MyClass, _one, "test");
+_defineProperty(MyClass, _ref, "247");
 _defineProperty(MyClass, _ref1, "247");
 _defineProperty(MyClass, _ref2, "247");
-_defineProperty(MyClass, _ref3, "247");
-
 "#
 );
 
@@ -1452,8 +1451,8 @@ var Outer = function Outer() {
     value: void 0
   });
 
-  var Test = function (_superClass) {
-    _inherits(Test, _superClass);
+  var Test = function (_classPrivateFieldGet1) {
+    _inherits(Test, _classPrivateFieldGet1);
     var _super = _createSuper(Test);
     function Test() {
       _classCallCheck(this, Test);
@@ -1899,11 +1898,11 @@ var Outer = function (Hello) {
     _classCallCheck(this, Outer);
     var _this = _super.call(this);
 
-    var _ref = _get((_assertThisInitialized(_this), _getPrototypeOf(Outer.prototype)), "toString", _this).call(_this);
+    var _super_toString = _get((_assertThisInitialized(_this), _getPrototypeOf(Outer.prototype)), "toString", _this).call(_this);
 
     var Inner = function Inner() {
       _classCallCheck(this, Inner);
-      _defineProperty(this, _ref, 'hello');
+      _defineProperty(this, _super_toString, 'hello');
     };
 
     return _possibleConstructorReturn(_this, new Inner());
@@ -2036,11 +2035,11 @@ function () {
   _createClass(Foo, [{
     key: "test",
     value: function test(other) {
-      var _obj;
+      var _other_obj;
 
       _classPrivateFieldSet(this, _foo, _classPrivateFieldGet(this, _foo) + 1);
       _classPrivateFieldSet(this, _foo, 2);
-      _classPrivateFieldSet(_obj = other.obj, _foo, _classPrivateFieldGet(_obj, _foo) + 1);
+      _classPrivateFieldSet(_other_obj = other.obj, _foo, _classPrivateFieldGet(_other_obj, _foo) + 1);
       _classPrivateFieldSet(other.obj, _foo, 2);
     }
   }]);
@@ -2350,10 +2349,10 @@ var Foo = function () {
   _createClass(Foo, [{
     key: "test",
     value: function test(other) {
-      var _obj;
+      var _other_obj;
 
       _classPrivateFieldGet(this, _foo).call(this);
-      _classPrivateFieldGet(_obj = other.obj, _foo).call(_obj);
+      _classPrivateFieldGet(_other_obj = other.obj, _foo).call(_other_obj);
     }
   }]);
   return Foo;
@@ -4081,9 +4080,9 @@ new SuperClass(); // ensure ComputedKey Method is still transformed
 class ComputedMethod extends Obj {
   constructor() {
     var _temp;
-    let tmp = (_temp = super(), _defineProperty(this, "field", 1), _temp);
+    let _tmp = (_temp = super(), _defineProperty(this, "field", 1), _temp);
     class B extends Obj {
-      [tmp]() {}
+      [_tmp]() {}
 
       constructor() {
         super();
@@ -4767,11 +4766,11 @@ const createClass = (k) => class { [k()] = 2 };
 "#,
     r#"
 var createClass = (k)=>{
-    var _ref = k();
+    var _k = k();
     var _class = function _class() {
         "use strict";
         _classCallCheck(this, _class);
-        _defineProperty(this, _ref, 2);
+        _defineProperty(this, _k, 2);
     };
     return _class;
 };
@@ -5397,9 +5396,9 @@ export class Node {
     }
 }
 function bar(parent) {
-    var _baz1;
+    var _parent_baz;
     _classPrivateMethodGet(parent, _baz, baz).call(parent, this);
-    _classPrivateMethodGet(_baz1 = parent.baz, _baz, baz).call(_baz1, this);
+    _classPrivateMethodGet(_parent_baz = parent.baz, _baz, baz).call(_parent_baz, this);
 }
 function baz(child) {}
 "
@@ -6182,30 +6181,31 @@ class MyClass {
 const foo = "foo";
 const bar = ()=>{};
 const four = 4;
-let _ref = one(), _ref1 = 2 * 4 + 7, _ref2 = 2 * four + 7, _ref3 = 2 * four + seven, _undefined = undefined, _ref4 = void 0, tmp = computed(), tmp1 = computed(), tmp2 = "test" + one, _ref5 = /regex/, _foo = foo, _bar = bar, _baz = baz, _ref6 = `template${expression}`;
+let _one = one(), _ref = 2 * 4 + 7, _ref1 = 2 * four + 7, _ref2 = 2 * four + seven, _undefined = undefined, _ref3 = void 0, _computed = computed(), _computed1 = computed(), _tmp = "test" + one, _ref4 = /regex/, _foo = foo, _bar = bar, _baz = baz, _ref5 = `template${expression}`;
 class MyClass {
     get ["whatever"]() {}
     set ["whatever"](value) {}
-    get [tmp]() {}
-    set [tmp1](value) {}
-    [tmp2]() {}
+    get [_computed]() {}
+    set [_computed1](value) {}
+    [_tmp]() {}
     static [10]() {}
     constructor(){
         this[null] = "null";
         this[_undefined] = "undefined";
-        this[_ref4] = "void 0";
-        this[_ref5] = "regex";
+        this[_ref3] = "void 0";
+        this[_ref4] = "regex";
         this[_foo] = "foo";
         this[_bar] = "bar";
         this[_baz] = "baz";
         this[`template`] = "template";
-        this[_ref6] = "template-with-expression";
+        this[_ref5] = "template-with-expression";
     }
 }
-MyClass[_ref] = "test";
+MyClass[_one] = "test";
+MyClass[_ref] = "247";
 MyClass[_ref1] = "247";
 MyClass[_ref2] = "247";
-MyClass[_ref3] = "247";
+
 "#
 );
 
diff --git a/crates/swc_ecma_transforms_typescript/tests/strip.rs b/crates/swc_ecma_transforms_typescript/tests/strip.rs
index 5078959aea80..6974d86f6045 100644
--- a/crates/swc_ecma_transforms_typescript/tests/strip.rs
+++ b/crates/swc_ecma_transforms_typescript/tests/strip.rs
@@ -3342,11 +3342,11 @@ test!(
     r#"
     const normalizedQuestionSet = {
     };
-    var _submissionIds;
-    const submissions = ((_submissionIds = normalizedQuestionSet.submissionIds) !== null && _submissionIds !== void 0 ? _submissionIds : []).map((id, index)=>{
+    var _normalizedQuestionSet_submissionIds;
+    const submissions = ((_normalizedQuestionSet_submissionIds = normalizedQuestionSet.submissionIds) !== null && _normalizedQuestionSet_submissionIds !== void 0 ? _normalizedQuestionSet_submissionIds : []).map((id, index)=>{
         const submission = normalizedQuestionSet.submissions?.[id];
-        var _answers;
-        const submissionAnswers = ((_answers = submission.answers) !== null && _answers !== void 0 ? _answers : []).map((answerId)=>normalizedQuestionSet.answers?.[answerId]
+        var _submission_answers;
+        const submissionAnswers = ((_submission_answers = submission.answers) !== null && _submission_answers !== void 0 ? _submission_answers : []).map((answerId)=>normalizedQuestionSet.answers?.[answerId]
         );
         console.log(id, index);
         return {
@@ -3832,9 +3832,9 @@ to!(
     }
     ",
     "
-    let _ref = (console.log(1), 'a'), _ref1 = (console.log(2), 'b'), tmp = (console.log(3), 'c');
+    let _ref = (console.log(1), 'a'), _ref1 = (console.log(2), 'b'), _tmp = (console.log(3), 'c');
     class A {
-        [tmp]() {}
+        [_tmp]() {}
         constructor() {
             this[_ref] = 1;
         }
@@ -4556,18 +4556,18 @@ let b = class {
 }
     ",
     "
-let _key;
-let _key1 = console.log(123);
+let _console_log;
+let _console_log1 = console.log(123);
 class A {
     constructor(a = 1){
         this.a = a;
-        this[_key1] = 456;
+        this[_console_log1] = 456;
     }
 }
-let b = (_key = console.log(456), class {
+let b = (_console_log = console.log(456), class {
     constructor(a = 1){
         this.a = a;
-        this[_key] = 123;
+        this[_console_log] = 123;
     }
 });
 "
diff --git a/crates/swc_ecma_utils/src/lib.rs b/crates/swc_ecma_utils/src/lib.rs
index 545394b908b7..8261637b0a3b 100644
--- a/crates/swc_ecma_utils/src/lib.rs
+++ b/crates/swc_ecma_utils/src/lib.rs
@@ -1912,27 +1912,62 @@ impl Visit for LiteralVisitor {
 
 /// Used to determine super_class_ident
 pub fn alias_ident_for(expr: &Expr, default: &str) -> Ident {
-    fn sym(expr: &Expr, default: &str) -> JsWord {
+    fn sym(expr: &Expr) -> Option<String> {
         match expr {
+            Expr::Lit(Lit::Str(s)) => Some(s.value.to_string()),
+            Expr::This(_) => Some("this".to_string()),
+
             Expr::Ident(ident)
-            | Expr::Member(MemberExpr {
-                prop: MemberProp::Ident(ident),
-                ..
+            | Expr::Fn(FnExpr {
+                ident: Some(ident), ..
             })
             | Expr::Class(ClassExpr {
                 ident: Some(ident), ..
-            }) => format!("_{}", ident.sym).into(),
+            }) => Some(ident.sym.to_string()),
+
+            Expr::Call(CallExpr {
+                callee: Callee::Expr(expr),
+                ..
+            }) => sym(expr),
+
+            Expr::SuperProp(SuperPropExpr {
+                prop: SuperProp::Ident(ident),
+                ..
+            }) => Some(format!("super_{}", ident.sym)),
+
+            Expr::SuperProp(SuperPropExpr {
+                prop: SuperProp::Computed(ComputedPropName { expr, .. }),
+                ..
+            }) => Some(format!("super_{}", sym(expr).unwrap_or_default())),
+
             Expr::Member(MemberExpr {
-                prop: MemberProp::Computed(computed),
+                prop: MemberProp::Ident(ident),
+                obj,
                 ..
-            }) => sym(&computed.expr, default),
+            }) => Some(format!("{}_{}", sym(obj).unwrap_or_default(), ident.sym)),
 
-            _ => default.into(),
+            Expr::Member(MemberExpr {
+                prop: MemberProp::Computed(ComputedPropName { expr, .. }),
+                obj,
+                ..
+            }) => Some(format!(
+                "{}_{}",
+                sym(obj).unwrap_or_default(),
+                sym(expr).unwrap_or_default()
+            )),
+
+            _ => None,
         }
     }
 
     let span = expr.span().apply_mark(Mark::fresh(Mark::root()));
-    quote_ident!(span, sym(expr, default))
+
+    let mut sym = sym(expr).unwrap_or_else(|| default.to_string());
+
+    if !sym.starts_with('_') {
+        sym = format!("_{}", sym)
+    }
+    quote_ident!(span, sym)
 }
 
 /// Returns `(ident, aliased)`
diff --git a/crates/swc_node_bundler/tests/pass/issue-1138/example-1/output/entry.js b/crates/swc_node_bundler/tests/pass/issue-1138/example-1/output/entry.js
index 1edb043e85d7..3b1e587c840e 100644
--- a/crates/swc_node_bundler/tests/pass/issue-1138/example-1/output/entry.js
+++ b/crates/swc_node_bundler/tests/pass/issue-1138/example-1/output/entry.js
@@ -1,4 +1,4 @@
 var a = "a";
 var o = {};
-var _a = o.a, a1 = _a === void 0 ? a : _a;
+var _o_a = o.a, a1 = _o_a === void 0 ? a : _o_a;
 console.log(a1);
diff --git a/crates/swc_node_bundler/tests/pass/issue-1138/example-2/output/entry.js b/crates/swc_node_bundler/tests/pass/issue-1138/example-2/output/entry.js
index 5488f7f0317c..8c753e8a8a86 100644
--- a/crates/swc_node_bundler/tests/pass/issue-1138/example-2/output/entry.js
+++ b/crates/swc_node_bundler/tests/pass/issue-1138/example-2/output/entry.js
@@ -1,4 +1,4 @@
 var defaultA = "a";
 var o = {};
-var _a = o.a, a = _a === void 0 ? defaultA : _a;
+var _o_a = o.a, a = _o_a === void 0 ? defaultA : _o_a;
 console.log(a);