MIPS: Avoid handle dereference during graph optimization.

src/mips/lithium-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1987 matching lines @@
   ASSERT(instr->object()->representation().IsTagged());
   ASSERT(instr->key()->representation().IsTagged());
   ASSERT(instr->value()->representation().IsTagged());
 
   return MarkAsCall(new(zone()) LStoreKeyedGeneric(obj, key, val), instr);
 }
 
 
 LInstruction* LChunkBuilder::DoTransitionElementsKind(
     HTransitionElementsKind* instr) {
-  ElementsKind from_kind = instr->original_map()->elements_kind();
-  ElementsKind to_kind = instr->transitioned_map()->elements_kind();
-  if (IsSimpleMapChangeTransition(from_kind, to_kind)) {
+  if (IsSimpleMapChangeTransition(instr->from_kind(), instr->to_kind())) {
     LOperand* object = UseRegister(instr->object());
     LOperand* new_map_reg = TempRegister();
     LTransitionElementsKind* result =
         new(zone()) LTransitionElementsKind(object, new_map_reg, NULL);
     return DefineSameAsFirst(result);
   } else {
     LOperand* object = UseFixed(instr->object(), a0);
     LOperand* fixed_object_reg = FixedTemp(a2);
     LOperand* new_map_reg = FixedTemp(a3);
     LTransitionElementsKind* result =
@@ skipping 234 matching lines @@
 }
 
 
 LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
   HEnvironment* outer = current_block_->last_environment();
   HConstant* undefined = graph()->GetConstantUndefined();
   HEnvironment* inner = outer->CopyForInlining(instr->closure(),
                                                instr->arguments_count(),
                                                instr->function(),
                                                undefined,
-                                               instr->call_kind(),
-                                               instr->inlining_kind());
+                                               instr->inlining_kind(),
+                                               instr->undefined_receiver());
   if (instr->arguments_var() != NULL) {
     inner->Bind(instr->arguments_var(), graph()->GetArgumentsObject());
   }
   inner->set_entry(instr);
   current_block_->UpdateEnvironment(inner);
   chunk_->AddInlinedClosure(instr->closure());
   return NULL;
 }
 
 
@@ skipping 45 matching lines @@
 
 
 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* index = UseRegister(instr->index());
   return DefineAsRegister(new(zone()) LLoadFieldByIndex(object, index));
 }
 
 
 } }  // namespace v8::internal