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

src/full-codegen/arm64/full-codegen-arm64.cc

 // Copyright 2013 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_ARM64
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/compiler.h"
@@ skipping 4209 matching lines @@
   ExternalReference debug_is_active =
       ExternalReference::debug_is_active_address(isolate());
   __ Mov(x10, debug_is_active);
   __ Ldrb(x0, MemOperand(x10));
   __ SmiTag(x0);
   context()->Plug(x0);
 }
 
 
 void FullCodeGenerator::EmitLoadJSRuntimeFunction(CallRuntime* expr) {
-  // Push the builtins object as the receiver.
-  __ Ldr(x10, GlobalObjectMemOperand());
-  __ Ldr(LoadDescriptor::ReceiverRegister(),
-         FieldMemOperand(x10, GlobalObject::kBuiltinsOffset));
-  __ Push(LoadDescriptor::ReceiverRegister());
+  // Push undefined as the receiver.
+  __ LoadRoot(x0, Heap::kUndefinedValueRootIndex);
+  __ Push(x0);
 
-  // Load the function from the receiver.
-  Handle<String> name = expr->name();
-  __ Mov(LoadDescriptor::NameRegister(), Operand(name));
-  __ Mov(LoadDescriptor::SlotRegister(),
-         SmiFromSlot(expr->CallRuntimeFeedbackSlot()));
-  CallLoadIC(NOT_INSIDE_TYPEOF);
+  __ Ldr(x0, GlobalObjectMemOperand());
+  __ Ldr(x0, FieldMemOperand(x0, GlobalObject::kNativeContextOffset));
+  __ Ldr(x0, ContextMemOperand(x0, 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);
   __ Peek(x1, (arg_count + 1) * kPointerSize);
@@ skipping 1149 matching lines @@
   }
 
   return INTERRUPT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64