Introduce a code stub version of Array.prototype.push

src/crankshaft/x64/lithium-codegen-x64.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_X64
 
 #include "src/crankshaft/x64/lithium-codegen-x64.h"
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 2983 matching lines @@
                         .code();
   CallCode(ic, RelocInfo::CODE_TARGET, instr);
 }
 
 
 void LCodeGen::DoArgumentsElements(LArgumentsElements* instr) {
   Register result = ToRegister(instr->result());
 
   if (instr->hydrogen()->from_inlined()) {
     __ leap(result, Operand(rsp, -kFPOnStackSize + -kPCOnStackSize));
-  } else {
+  } else if (instr->hydrogen()->arguments_adaptor()) {
     // Check for arguments adapter frame.
     Label done, adapted;
     __ movp(result, Operand(rbp, StandardFrameConstants::kCallerFPOffset));
     __ Cmp(Operand(result, CommonFrameConstants::kContextOrFrameTypeOffset),
            Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR));
     __ j(equal, &adapted, Label::kNear);
 
     // No arguments adaptor frame.
     __ movp(result, rbp);
     __ jmp(&done, Label::kNear);
 
     // Arguments adaptor frame present.
     __ bind(&adapted);
     __ movp(result, Operand(rbp, StandardFrameConstants::kCallerFPOffset));
 
     // Result is the frame pointer for the frame if not adapted and for the real
     // frame below the adaptor frame if adapted.
     __ bind(&done);
+  } else {
+    __ movp(result, rbp);
   }
 }
 
 
 void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) {
   Register result = ToRegister(instr->result());
 
   Label done;
 
   // If no arguments adaptor frame the number of arguments is fixed.
@@ skipping 2543 matching lines @@
   __ movp(Operand(rbp, StandardFrameConstants::kContextOffset), context);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64