Allow control intructions to have side effects.

src/arm/lithium-codegen-arm.cc

 // Copyright 2012 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 2870 matching lines @@
 
 
 void LCodeGen::DoInstanceSize(LInstanceSize* instr) {
   Register object = ToRegister(instr->object());
   Register result = ToRegister(instr->result());
   __ ldr(result, FieldMemOperand(object, HeapObject::kMapOffset));
   __ ldrb(result, FieldMemOperand(result, Map::kInstanceSizeOffset));
 }
 
 
-void LCodeGen::DoCmpT(LCmpT* instr) {
+void LCodeGen::DoCompareGenericAndBranch(LCompareGenericAndBranch* instr) {
   Token::Value op = instr->op();
 
   Handle<Code> ic = CompareIC::GetUninitialized(isolate(), op);
   CallCode(ic, RelocInfo::CODE_TARGET, instr);
   // This instruction also signals no smi code inlined.
   __ cmp(r0, Operand::Zero());
 
   Condition condition = ComputeCompareCondition(op);
-  __ LoadRoot(ToRegister(instr->result()),
-              Heap::kTrueValueRootIndex,
-              condition);
-  __ LoadRoot(ToRegister(instr->result()),
-              Heap::kFalseValueRootIndex,
-              NegateCondition(condition));
+  EmitBranch(instr, condition);
 }
 
 
 void LCodeGen::DoReturn(LReturn* instr) {
   if (FLAG_trace && info()->IsOptimizing()) {
     // Push the return value on the stack as the parameter.
     // Runtime::TraceExit returns its parameter in r0.
     __ push(r0);
     __ CallRuntime(Runtime::kTraceExit, 1);
   }
@@ skipping 2871 matching lines @@
   __ sub(scratch, result, Operand::PointerOffsetFromSmiKey(index));
   __ ldr(result, FieldMemOperand(scratch,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal