Merged: [compiler] Don't elide ChangeTaggedToInt32->ChangeInt31ToTagg…

…edSigned

(cherry picked from commit 4fae8b16802a416fe3aab0e7792fabe96cf1ecd8)

Bug: chromium:1278387
No-Try: true
No-Presubmit: true
No-Tree-Checks: true
Change-Id: Ia6b361f702261464e02785659a2a90cd2488a101
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3329666
Reviewed-by: Toon Verwaest <[email protected]>
Cr-Commit-Position: refs/branch-heads/9.7@{#34}
Cr-Branched-From: 49162da-refs/heads/9.7.106@{#1}
Cr-Branched-From: a7e9b8f-refs/heads/main@{#77674}

src/compiler/simplified-operator-reducer.cc

@@ -77,7 +77,7 @@ Reduction SimplifiedOperatorReducer::Reduce(Node* node) {
     case IrOpcode::kChangeInt32ToTagged: {
       Int32Matcher m(node->InputAt(0));
       if (m.HasResolvedValue()) return ReplaceNumber(m.ResolvedValue());
-      if (m.IsChangeTaggedToInt32() || m.IsChangeTaggedSignedToInt32()) {
+      if (m.IsChangeTaggedSignedToInt32()) {
         return Replace(m.InputAt(0));
       }
       break;