Fix ARM build for gcc-4.6.

src/arm/lithium-codegen-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 1786 matching lines @@
   __ cmp(temp2, Operand(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE));
   __ b(lt, is_not_object);
   __ cmp(temp2, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE));
   return le;
 }
 
 
 void LCodeGen::DoIsObjectAndBranch(LIsObjectAndBranch* instr) {
   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);
 
   EmitBranch(true_block, false_block, true_cond);
@@ skipping 934 matching lines @@
 
 void LCodeGen::DoOuterContext(LOuterContext* instr) {
   Register context = ToRegister(instr->context());
   Register result = ToRegister(instr->result());
   __ ldr(result,
          MemOperand(context, Context::SlotOffset(Context::PREVIOUS_INDEX)));
 }
 
 
 void LCodeGen::DoGlobalObject(LGlobalObject* instr) {
-  Register context = ToRegister(instr->context());
   Register result = ToRegister(instr->result());
   __ ldr(result, ContextOperand(cp, Context::GLOBAL_INDEX));
 }
 
 
 void LCodeGen::DoGlobalReceiver(LGlobalReceiver* instr) {
   Register global = ToRegister(instr->global());
   Register result = ToRegister(instr->result());
   __ ldr(result, FieldMemOperand(global, GlobalObject::kGlobalReceiverOffset));
 }
@@ skipping 1185 matching lines @@
                    instr->hydrogen()->deoptimize_on_undefined(),
                    instr->environment());
 }
 
 
 void LCodeGen::DoDoubleToI(LDoubleToI* instr) {
   Register result_reg = ToRegister(instr->result());
   Register scratch1 = scratch0();
   Register scratch2 = ToRegister(instr->TempAt(0));
   DwVfpRegister double_input = ToDoubleRegister(instr->InputAt(0));
-  DwVfpRegister double_scratch = double_scratch0();
   SwVfpRegister single_scratch = double_scratch0().low();
 
   Label done;
 
   if (instr->truncating()) {
     Register scratch3 = ToRegister(instr->TempAt(1));
     __ EmitECMATruncate(result_reg,
                         double_input,
                         single_scratch,
                         scratch1,
@@ skipping 548 matching lines @@
   ASSERT(osr_pc_offset_ == -1);
   osr_pc_offset_ = masm()->pc_offset();
 }
 
 
 
 
 #undef __
 
 } }  // namespace v8::internal