From 1f99c3a44cab4faed5f5ddfe08f6b1a6da80f167 Mon Sep 17 00:00:00 2001
From: Niklas Mischkulnig <4586894+mischnic@users.noreply.github.com>
Date: Fri, 8 Oct 2021 04:56:09 +0200
Subject: [PATCH] fix(es/transforms/optimization): Fix `dead_branch_remover`
 (#2373)

swc_ecma_transforms_optimization:
 - `dead_branch_remover`: Fix handling of `switch(boolean)`.
---
 Cargo.lock                                                   | 2 +-
 ecmascript/transforms/optimization/Cargo.toml                | 2 +-
 .../transforms/optimization/src/simplify/branch/mod.rs       | 4 ++++
 .../transforms/optimization/src/simplify/branch/tests.rs     | 5 +++++
 4 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 33bc8427181b..9329a80ff492 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2851,7 +2851,7 @@ dependencies = [
 
 [[package]]
 name = "swc_ecma_transforms_optimization"
-version = "0.49.0"
+version = "0.49.1"
 dependencies = [
  "dashmap",
  "indexmap",
diff --git a/ecmascript/transforms/optimization/Cargo.toml b/ecmascript/transforms/optimization/Cargo.toml
index adb6bc86e7b5..2fdc9ecf0da3 100644
--- a/ecmascript/transforms/optimization/Cargo.toml
+++ b/ecmascript/transforms/optimization/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2018"
 license = "Apache-2.0/MIT"
 name = "swc_ecma_transforms_optimization"
 repository = "https://github.com/swc-project/swc.git"
-version = "0.49.0"
+version = "0.49.1"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
diff --git a/ecmascript/transforms/optimization/src/simplify/branch/mod.rs b/ecmascript/transforms/optimization/src/simplify/branch/mod.rs
index d0d1611af085..1f291967965c 100644
--- a/ecmascript/transforms/optimization/src/simplify/branch/mod.rs
+++ b/ecmascript/transforms/optimization/src/simplify/branch/mod.rs
@@ -602,6 +602,10 @@ impl VisitMut for Remover {
                                         &Expr::Lit(Lit::Num(Number { value: test, .. })),
                                         &Expr::Lit(Lit::Num(Number { value: d, .. })),
                                     ) => (test - d).abs() < 1e-10,
+                                    (
+                                        &Expr::Lit(Lit::Bool(Bool { value: test, .. })),
+                                        &Expr::Lit(Lit::Bool(Bool { value: d, .. })),
+                                    ) => test == d,
                                     (&Expr::Lit(Lit::Null(..)), &Expr::Lit(Lit::Null(..))) => true,
                                     (&Expr::Ident(ref test), &Expr::Ident(ref d)) => {
                                         test.sym == d.sym && test.span.ctxt() == d.span.ctxt()
diff --git a/ecmascript/transforms/optimization/src/simplify/branch/tests.rs b/ecmascript/transforms/optimization/src/simplify/branch/tests.rs
index f71467c7352e..30f5239922bd 100644
--- a/ecmascript/transforms/optimization/src/simplify/branch/tests.rs
+++ b/ecmascript/transforms/optimization/src/simplify/branch/tests.rs
@@ -540,6 +540,11 @@ fn test_optimize_switch_4() {
         "switch (1) {\ncase 1:\n  foo();\n  break;\ncase 2:\n  bar();\n  break;\n}",
         "foo();",
     );
+    test(
+        "switch (true) {\ncase true:\n  foo();\n  break;\ncase false:\n  bar();\n break; 
+            default: foobar(); break; \n}",
+        "foo();",
+    );
     test(
         "switch (1) {\ncase 1.1:\n  foo();\n  break;\ncase 2:\n  bar();\n  break;\n}",
         "",