%X => %_X, %_X => %__X

src/hydrogen.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 8631 matching lines @@
 
 
 // Check for the form (%_ClassOf(foo) === 'BarClass').
 static bool IsClassOfTest(CompareOperation* expr) {
   if (expr->op() != Token::EQ_STRICT) return false;
   CallRuntime* call = expr->left()->AsCallRuntime();
   if (call == NULL) return false;
   Literal* literal = expr->right()->AsLiteral();
   if (literal == NULL) return false;
   if (!literal->handle()->IsString()) return false;
-  if (!call->name()->IsOneByteEqualTo(STATIC_ASCII_VECTOR("_ClassOf"))) {
+  if (!call->name()->IsOneByteEqualTo(STATIC_ASCII_VECTOR("__ClassOf"))) {
     return false;
   }
   ASSERT(call->arguments()->length() == 1);
   return true;
 }
 
 
 void HOptimizedGraphBuilder::VisitBinaryOperation(BinaryOperation* expr) {
   ASSERT(!HasStackOverflow());
   ASSERT(current_block() != NULL);
@@ skipping 1685 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal