Merge r8443 from bleeding edge to 3.2 branch.

src/arm/lithium-arm.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 1078 matching lines @@
     } else if (v->IsIsNull()) {
       HIsNull* compare = HIsNull::cast(v);
       ASSERT(compare->value()->representation().IsTagged());
 
       return new LIsNullAndBranch(UseRegisterAtStart(compare->value()));
     } else if (v->IsIsObject()) {
       HIsObject* compare = HIsObject::cast(v);
       ASSERT(compare->value()->representation().IsTagged());
 
       LOperand* temp = TempRegister();
-      return new LIsObjectAndBranch(UseRegisterAtStart(compare->value()), temp);
+      return new LIsObjectAndBranch(UseRegister(compare->value()), temp);
     } else if (v->IsCompareJSObjectEq()) {
       HCompareJSObjectEq* compare = HCompareJSObjectEq::cast(v);
       return new LCmpJSObjectEqAndBranch(UseRegisterAtStart(compare->left()),
                                          UseRegisterAtStart(compare->right()));
     } else if (v->IsInstanceOf()) {
       HInstanceOf* instance_of = HInstanceOf::cast(v);
       LInstruction* result =
           new LInstanceOfAndBranch(UseFixed(instance_of->left(), r0),
                                    UseFixed(instance_of->right(), r1));
       return MarkAsCall(result, instr);
@@ skipping 1005 matching lines @@
 
 
 LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
   HEnvironment* outer = current_block_->last_environment()->outer();
   current_block_->UpdateEnvironment(outer);
   return NULL;
 }
 
 
 } }  // namespace v8::internal