Call JS functions via native context instead of js builtins object.

src/full-codegen/arm/full-codegen-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/compiler.h"
@@ skipping 4513 matching lines @@
   ExternalReference debug_is_active =
       ExternalReference::debug_is_active_address(isolate());
   __ mov(ip, Operand(debug_is_active));
   __ ldrb(r0, MemOperand(ip));
   __ SmiTag(r0);
   context()->Plug(r0);
 }
 
 
 void FullCodeGenerator::EmitLoadJSRuntimeFunction(CallRuntime* expr) {
-  // Push the builtins object as the receiver.
-  Register receiver = LoadDescriptor::ReceiverRegister();
-  __ ldr(receiver, GlobalObjectOperand());
-  __ ldr(receiver, FieldMemOperand(receiver, GlobalObject::kBuiltinsOffset));
-  __ push(receiver);
+  // Push undefined as the receiver.
+  __ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
+  __ push(r0);
 
-  // Load the function from the receiver.
-  __ mov(LoadDescriptor::NameRegister(), Operand(expr->name()));
-  __ mov(LoadDescriptor::SlotRegister(),
-         Operand(SmiFromSlot(expr->CallRuntimeFeedbackSlot())));
-  CallLoadIC(NOT_INSIDE_TYPEOF);
+  __ ldr(r0, GlobalObjectOperand());
+  __ ldr(r0, FieldMemOperand(r0, GlobalObject::kNativeContextOffset));
+  __ ldr(r0, ContextOperand(r0, expr->context_index()));
 }
 
 
 void FullCodeGenerator::EmitCallJSRuntimeFunction(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   int arg_count = args->length();
 
   SetCallPosition(expr, arg_count);
   CallFunctionStub stub(isolate(), arg_count, NO_CALL_FUNCTION_FLAGS);
   __ ldr(r1, MemOperand(sp, (arg_count + 1) * kPointerSize));
@@ skipping 858 matching lines @@
   DCHECK(interrupt_address ==
          isolate->builtins()->OsrAfterStackCheck()->entry());
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM