fix(es/typescript): Fix computation of enum bits (#7219)

**Related issue:**

 - Closes #7218.

crates/swc/tests/fixture/issues-7xxx/7218/input/index.ts

@@ -0,0 +1,9 @@
+export enum Test {
+  A = 1 << 30, // 1073741824
+  B = 1 << 31, // -2147483648
+  C = (1 << 30) | (1 << 31), // -1073741824
+}
+
+const a = 1 << 30; // 1073741824
+const b = 1 << 31; // -2147483648
+const c = (1 << 30) | (1 << 31); // -1073741824

crates/swc/tests/fixture/issues-7xxx/7218/output/index.ts

@@ -0,0 +1,9 @@
+export var Test;
+(function(Test) {
+    Test[Test["A"] = 1073741824] = "A";
+    Test[Test["B"] = -2147483648] = "B";
+    Test[Test["C"] = -1073741824] = "C";
+})(Test || (Test = {}));
+var a = 1 << 30; // 1073741824
+var b = 1 << 31; // -2147483648
+var c = 1 << 30 | 1 << 31; // -1073741824

crates/swc_ecma_transforms_typescript/src/strip.rs

@@ -541,14 +541,16 @@ where
                                 op!("/") => l / r,
 
                                 // TODO
-                                op!("&") => ((l.round() as i64) & (r.round() as i64)) as _,
-                                op!("|") => ((l.round() as i64) | (r.round() as i64)) as _,
-                                op!("^") => ((l.round() as i64) ^ (r.round() as i64)) as _,
-
-                                op!("<<") => ((l.round() as i64) << (r.round() as i64)) as _,
-                                op!(">>") => ((l.round() as i64) >> (r.round() as i64)) as _,
+                                op!("&") => ((l.trunc() as i32) & (r.trunc() as i32)) as _,
+                                op!("|") => ((l.trunc() as i32) | (r.trunc() as i32)) as _,
+                                op!("^") => ((l.trunc() as i32) ^ (r.trunc() as i32)) as _,
+                                op!("<<") => (l.trunc() as i32).wrapping_shl(r.trunc() as u32) as _,
+                                op!(">>") => (l.trunc() as i32).wrapping_shr(r.trunc() as u32) as _,
                                 // TODO: Verify this
-                                op!(">>>") => ((l.round() as u64) >> (r.round() as u64)) as _,
+                                op!(">>>") => {
+                                    (l.trunc() as u32).wrapping_shr(r.trunc() as u32) as _
+                                }
+
                                 _ => return Err(()),
                             },
                             raw: None,