Changeset 198803 in webkit for trunk/Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp

Timestamp:

Mar 29, 2016, 3:11:24 PM (9 years ago)

Author:

[email protected]

Message:

We don't properly optimize TDZ checks when we declare a let variable without an initializer
​https://bugs.webkit.org/show_bug.cgi?id=150453

Reviewed by Mark Lam.

• bytecompiler/NodesCodegen.cpp:

(JSC::EmptyLetExpression::emitBytecode):

File:

• trunk/Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp (modified) (1 diff)

trunk/Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp

@@ -2152 +2152 @@
     }
 
+    generator.liftTDZCheckIfPossible(var);
+
     // It's safe to return null here because this node will always be a child node of DeclarationStatement which ignores our return value.
     return nullptr;