Introduce a code stub version of Array.prototype.push

src/crankshaft/mips64/lithium-codegen-mips64.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.
 
 #include "src/crankshaft/mips64/lithium-codegen-mips64.h"
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/crankshaft/hydrogen-osr.h"
 #include "src/crankshaft/mips64/lithium-gap-resolver-mips64.h"
@@ skipping 3147 matching lines @@
 }
 
 
 void LCodeGen::DoArgumentsElements(LArgumentsElements* instr) {
   Register scratch = scratch0();
   Register temp = scratch1();
   Register result = ToRegister(instr->result());
 
   if (instr->hydrogen()->from_inlined()) {
     __ Dsubu(result, sp, 2 * kPointerSize);
-  } else {
+  } else if (instr->hydrogen()->arguments_adaptor()) {
     // Check if the calling frame is an arguments adaptor frame.
     Label done, adapted;
     __ ld(scratch, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
     __ ld(result,
           MemOperand(scratch, CommonFrameConstants::kContextOrFrameTypeOffset));
     __ Xor(temp, result, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
 
     // Result is the frame pointer for the frame if not adapted and for the real
     // frame below the adaptor frame if adapted.
     __ Movn(result, fp, temp);  // Move only if temp is not equal to zero (ne).
     __ Movz(result, scratch, temp);  // Move only if temp is equal to zero (eq).
+  } else {
+    __ mov(result, fp);
   }
 }
 
 
 void LCodeGen::DoArgumentsLength(LArgumentsLength* instr) {
   Register elem = ToRegister(instr->elements());
   Register result = ToRegister(instr->result());
 
   Label done;
 
@@ skipping 2572 matching lines @@
 void LCodeGen::DoStoreFrameContext(LStoreFrameContext* instr) {
   Register context = ToRegister(instr->context());
   __ sd(context, MemOperand(fp, StandardFrameConstants::kContextOffset));
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8