fix(es/minifier): Fix usage counter to fix infinite loop

crates/swc/tests/fixture/issues-6xxx/6729/input/.swcrc

@@ -0,0 +1,19 @@
+{
+    "jsc": {
+        "parser": {
+            "syntax": "typescript",
+            "decorators": true,
+            "tsx": false
+        },
+        "target": "es2020",
+        "loose": false,
+        "minify": {
+            "compress": true,
+            "mangle": false
+        }
+    },
+    "module": {
+        "type": "es6"
+    },
+    "isModule": true
+}

crates/swc/tests/fixture/issues-6xxx/6729/input/index.js

@@ -0,0 +1,13 @@
+export async function foo() {
+    if (undefined_var_1) {
+        let replace;
+
+        if (undefined_var_2) {
+            replace = 1;
+        } else {
+            replace = 2;
+        }
+
+        await a({ replace })
+    }
+}

crates/swc/tests/fixture/issues-6xxx/6729/output/index.js

@@ -0,0 +1,5 @@
+export async function foo() {
+    undefined_var_1 && await a({
+        replace: undefined_var_2 ? 1 : 2
+    });
+}

crates/swc_ecma_minifier/src/compress/optimize/sequences.rs

@@ -2444,15 +2444,6 @@ impl Visit for UsageCounter<'_> {
         }
     }
 
-    fn visit_super_prop_expr(&mut self, e: &SuperPropExpr) {
-        if let SuperProp::Computed(c) = &e.prop {
-            let old = self.in_lhs;
-            self.in_lhs = false;
-            c.expr.visit_with(self);
-            self.in_lhs = old;
-        }
-    }
-
     fn visit_pat(&mut self, p: &Pat) {
         let old = self.in_lhs;
         self.in_lhs = true;
@@ -2466,6 +2457,21 @@ impl Visit for UsageCounter<'_> {
         p.visit_children_with(self);
         self.in_lhs = old;
     }
+
+    fn visit_prop_name(&mut self, p: &PropName) {
+        if let PropName::Computed(p) = p {
+            p.visit_with(self)
+        }
+    }
+
+    fn visit_super_prop_expr(&mut self, e: &SuperPropExpr) {
+        if let SuperProp::Computed(c) = &e.prop {
+            let old = self.in_lhs;
+            self.in_lhs = false;
+            c.expr.visit_with(self);
+            self.in_lhs = old;
+        }
+    }
 }
 
 #[derive(Debug)]

crates/swc_ecma_minifier/tests/exec.rs

@@ -10407,3 +10407,25 @@ fn issue_6641() {
         "###,
     )
 }
+
+#[test]
+fn issue_6728() {
+    run_default_exec_test(
+        r###"
+        async function foo() {
+            if (undefined_var_1) {
+              let replace;
+
+              if (undefined_var_2) {
+                replace = 1;
+              } else {
+                replace = 2;
+              }
+
+              await a({ replace })
+            }
+        }
+        console.log('PASS')
+        "###,
+    )
+}