Better fix for LiteralCompareTypeof

src/ast.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 345 matching lines @@
 }
 
 
 // Check for the pattern: typeof <expression> equals <string literal>.
 static bool MatchLiteralCompareTypeof(Expression* left,
                                       Token::Value op,
                                       Expression* right,
                                       Expression** expr,
                                       Handle<String>* check) {
   if (IsTypeof(left) && right->IsStringLiteral() && Token::IsEqualityOp(op)) {
-    *expr = left;
+    *expr = left->AsUnaryOperation()->expression();
     *check = Handle<String>::cast(right->AsLiteral()->value());
     return true;
   }
   return false;
 }
 
 
 bool CompareOperation::IsLiteralCompareTypeof(Expression** expr,
                                               Handle<String>* check) {
   return MatchLiteralCompareTypeof(left_, op_, right_, expr, check) ||
@@ skipping 818 matching lines @@
     OS::SNPrintF(buffer, "%d", Smi::cast(*value_)->value());
     str = arr;
   } else {
     str = DoubleToCString(value_->Number(), buffer);
   }
   return factory->NewStringFromAscii(CStrVector(str));
 }
 
 
 } }  // namespace v8::internal