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

src/mips/lithium-codegen-mips.cc

Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index ca1d2b5bb524b0e8d01fca52e55c88703578a9fb..77c2c18aee14144ef3265991bfefe694ef638e9c 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -1686,9 +1686,9 @@ void LCodeGen::DoIsNilAndBranch(LIsNilAndBranch* instr) {
 
 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);
@@ -1721,7 +1721,7 @@ void LCodeGen::DoIsObjectAndBranch(LIsObjectAndBranch* instr) {
   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));