MIPS: Fixed a minor inconsistency in lithium-codegen-mips.cc

src/mips/lithium-codegen-mips.cc

 // Copyright 2011 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 1668 matching lines @@
     __ lw(scratch, FieldMemOperand(reg, HeapObject::kMapOffset));
     __ lbu(scratch, FieldMemOperand(scratch, Map::kBitFieldOffset));
     __ And(scratch, scratch, 1 << Map::kIsUndetectable);
     EmitBranch(true_block, false_block, ne, scratch, Operand(zero_reg));
   }
 }
 
 
 Condition LCodeGen::EmitIsObject(Register input,
                                  Register temp1,
+                                 Register temp2,
                                  Label* is_not_object,
                                  Label* is_object) {
-  Register temp2 = scratch0();
   __ JumpIfSmi(input, is_not_object);
 
   __ LoadRoot(temp2, Heap::kNullValueRootIndex);
   __ Branch(is_object, eq, input, Operand(temp2));
 
   // Load map.
   __ lw(temp1, FieldMemOperand(input, HeapObject::kMapOffset));
   // Undetectable objects behave like undefined.
   __ lbu(temp2, FieldMemOperand(temp1, Map::kBitFieldOffset));
   __ And(temp2, temp2, Operand(1 << Map::kIsUndetectable));
@@ skipping 12 matching lines @@
   Register reg = ToRegister(instr->InputAt(0));
   Register temp1 = ToRegister(instr->TempAt(0));
   Register temp2 = scratch0();
 
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
   Label* true_label = chunk_->GetAssemblyLabel(true_block);
   Label* false_label = chunk_->GetAssemblyLabel(false_block);
 
   Condition true_cond =
-      EmitIsObject(reg, temp1, false_label, true_label);
+      EmitIsObject(reg, temp1, temp2, false_label, true_label);
 
   EmitBranch(true_block, false_block, true_cond, temp2,
              Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE));
 }
 
 
 void LCodeGen::DoIsSmiAndBranch(LIsSmiAndBranch* instr) {
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   int false_block = chunk_->LookupDestination(instr->false_block_id());
 
@@ skipping 2887 matching lines @@
   ASSERT(!environment->HasBeenRegistered());
   RegisterEnvironmentForDeoptimization(environment);
   ASSERT(osr_pc_offset_ == -1);
   osr_pc_offset_ = masm()->pc_offset();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal