CSA fast path for Map.prototype.(Get|Has) for string keys.

src/code-stub-assembler.cc

Index: src/code-stub-assembler.cc
diff --git a/src/code-stub-assembler.cc b/src/code-stub-assembler.cc
index e4df4890a603c917c691ac68846dff5a54f7cc6d..97fe97b837ef1a1eccb40c4745859f31583b523c 100644
--- a/src/code-stub-assembler.cc
+++ b/src/code-stub-assembler.cc
@@ -1220,7 +1220,7 @@ Node* CodeStubAssembler::LoadNameHashField(Node* name) {
 Node* CodeStubAssembler::LoadNameHash(Node* name, Label* if_hash_not_computed) {
   Node* hash_field = LoadNameHashField(name);
   if (if_hash_not_computed != nullptr) {
-    GotoIf(IsClearWord32(hash_field, Name::kHashNotComputedMask),

[Camillo Bruni, 2017/07/03 14:51:29]

doh! that might have been me during a refactoring...

[Jarin, 2017/07/04 04:24:47]

Acknowledged.

+    GotoIf(IsSetWord32(hash_field, Name::kHashNotComputedMask),
            if_hash_not_computed);
   }
   return Word32Shr(hash_field, Int32Constant(Name::kHashShift));