Make (some) functions called from builtin functions use the callback's global as receiver.

src/x64/full-codegen-x64.cc

 // Copyright 2011 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 3500 matching lines @@
   __ movq(rax, result_operand);
 
   __ bind(&return_result);
   // Drop temp values from the stack, and restore context register.
   __ addq(rsp, Immediate(3 * kPointerSize));
   __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
   context()->Plug(rax);
 }
 
 
-void FullCodeGenerator::EmitIsNativeOrStrictMode(ZoneList<Expression*>* args) {
-  ASSERT(args->length() == 1);
-
-  // Load the function into rax.
-  VisitForAccumulatorValue(args->at(0));
-
-  // Prepare for the test.
-  Label materialize_true, materialize_false;
-  Label* if_true = NULL;
-  Label* if_false = NULL;
-  Label* fall_through = NULL;
-  context()->PrepareTest(&materialize_true, &materialize_false,
-                         &if_true, &if_false, &fall_through);
-
-  // Test for strict mode function.
-  __ movq(rdx, FieldOperand(rax, JSFunction::kSharedFunctionInfoOffset));
-  __ testb(FieldOperand(rdx, SharedFunctionInfo::kStrictModeByteOffset),
-           Immediate(1 << SharedFunctionInfo::kStrictModeBitWithinByte));
-  __ j(not_equal, if_true);
-
-  // Test for native function.
-  __ testb(FieldOperand(rdx, SharedFunctionInfo::kNativeByteOffset),
-           Immediate(1 << SharedFunctionInfo::kNativeBitWithinByte));
-  __ j(not_equal, if_true);
-
-  // Not native or strict-mode function.
-  __ jmp(if_false);
-
-  PrepareForBailoutBeforeSplit(TOS_REG, true, if_true, if_false);
-  context()->Plug(if_true, if_false);
-}
-
-
 void FullCodeGenerator::VisitCallRuntime(CallRuntime* expr) {
   Handle<String> name = expr->name();
   if (name->length() > 0 && name->Get(0) == '_') {
     Comment cmnt(masm_, "[ InlineRuntimeCall");
     EmitInlineRuntimeCall(expr);
     return;
   }
 
   Comment cmnt(masm_, "[ CallRuntime");
   ZoneList<Expression*>* args = expr->arguments();
@@ skipping 673 matching lines @@
   __ jmp(rdx);
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64