MIPS: Avoid handle dereference during graph optimization.

src/mips/lithium-codegen-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 778 matching lines @@
       ? Deoptimizer::LAZY
       : Deoptimizer::EAGER;
   Address entry = Deoptimizer::GetDeoptimizationEntry(id, bailout_type);
   if (entry == NULL) {
     Abort("bailout was not prepared");
     return;
   }
 
   ASSERT(FLAG_deopt_every_n_times < 2);  // Other values not supported on MIPS.
 
-  if (FLAG_deopt_every_n_times == 1 &&
-      info_->shared_info()->opt_count() == id) {
+  if (FLAG_deopt_every_n_times == 1 && info_->opt_count() == id) {
     __ Jump(entry, RelocInfo::RUNTIME_ENTRY);
     return;
   }
 
   if (FLAG_trap_on_deopt) {
     Label skip;
     if (cc != al) {
       __ Branch(&skip, NegateCondition(cc), src1, src2);
     }
     __ stop("trap_on_deopt");
@@ skipping 3390 matching lines @@
 }
 
 
 void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
   Register object_reg = ToRegister(instr->object());
   Register new_map_reg = ToRegister(instr->new_map_temp());
   Register scratch = scratch0();
 
   Handle<Map> from_map = instr->original_map();
   Handle<Map> to_map = instr->transitioned_map();
-  ElementsKind from_kind = from_map->elements_kind();
-  ElementsKind to_kind = to_map->elements_kind();
+  ElementsKind from_kind = instr->from_kind();
+  ElementsKind to_kind = instr->to_kind();
 
   __ mov(ToRegister(instr->result()), object_reg);
 
   Label not_applicable;
   __ lw(scratch, FieldMemOperand(object_reg, HeapObject::kMapOffset));
   __ Branch(&not_applicable, ne, scratch, Operand(from_map));
 
   __ li(new_map_reg, Operand(to_map));
   if (IsSimpleMapChangeTransition(from_kind, to_kind)) {
     __ sw(new_map_reg, FieldMemOperand(object_reg, HeapObject::kMapOffset));
@@ skipping 1600 matching lines @@
   __ Subu(scratch, result, scratch);
   __ lw(result, FieldMemOperand(scratch,
                                 FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal