ARM: Implement DoIsObject and DoIsObjectAndBranch in the lithium code generator..

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index 8d839caa1c059d2b9d5834f12f73861fe0063a10..431684555bafd92c4a9230aff84ed7685f55e731 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -1017,11 +1017,9 @@ LInstruction* LChunkBuilder::DoTest(HTest* instr) {
       HIsObject* compare = HIsObject::cast(v);
       ASSERT(compare->value()->representation().IsTagged());
 
-      LOperand* temp1 = TempRegister();
-      LOperand* temp2 = TempRegister();
+      LOperand* temp = TempRegister();
       return new LIsObjectAndBranch(UseRegisterAtStart(compare->value()),
-                                    temp1,
-                                    temp2,
+                                    temp,
                                     first_id,
                                     second_id);
     } else if (v->IsCompareJSObjectEq()) {
@@ -1411,7 +1409,7 @@ LInstruction* LChunkBuilder::DoIsObject(HIsObject* instr) {
   ASSERT(instr->value()->representation().IsTagged());
   LOperand* value = UseRegisterAtStart(instr->value());
 
-  return DefineAsRegister(new LIsObject(value, TempRegister()));
+  return DefineAsRegister(new LIsObject(value));
 }