Introduce a code stub version of Array.prototype.push

src/crankshaft/x87/lithium-codegen-x87.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_X87
 
 #include "src/crankshaft/x87/lithium-codegen-x87.h"
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 3056 matching lines @@
                         .code();
   CallCode(ic, RelocInfo::CODE_TARGET, instr);
 }
 
 
 void LCodeGen::DoArgumentsElements(LArgumentsElements* instr) {
   Register result = ToRegister(instr->result());
 
   if (instr->hydrogen()->from_inlined()) {
     __ lea(result, Operand(esp, -2 * kPointerSize));
-  } else {
+  } else if (instr->hydrogen()->arguments_adaptor()) {
     // Check for arguments adapter frame.
     Label done, adapted;
     __ mov(result, Operand(ebp, StandardFrameConstants::kCallerFPOffset));
     __ mov(result,
            Operand(result, CommonFrameConstants::kContextOrFrameTypeOffset));
     __ cmp(Operand(result),
            Immediate(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
     __ j(equal, &adapted, Label::kNear);
 
     // No arguments adaptor frame.
     __ mov(result, Operand(ebp));
     __ jmp(&done, Label::kNear);
 
     // Arguments adaptor frame present.
     __ bind(&adapted);
     __ mov(result, Operand(ebp, 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 {
+    __ mov(result, Operand(ebp));
   }
 }
 
 
 void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) {
   Operand elem = ToOperand(instr->elements());
   Register result = ToRegister(instr->result());
 
   Label done;
 
@@ skipping 2718 matching lines @@
   __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), context);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87