Fix SSE2 scope being too broad in DoCmpIDAndBranch.

src/ia32/lithium-codegen-ia32.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 2146 matching lines @@
   return cond;
 }
 
 
 void LCodeGen::DoCmpIDAndBranch(LCmpIDAndBranch* instr) {
   LOperand* left = instr->left();
   LOperand* right = instr->right();
   int false_block = chunk_->LookupDestination(instr->false_block_id());
   int true_block = chunk_->LookupDestination(instr->true_block_id());
   Condition cc = TokenToCondition(instr->op(), instr->is_double());
-  CpuFeatures::Scope scope(SSE2);
 
   if (left->IsConstantOperand() && right->IsConstantOperand()) {
     // We can statically evaluate the comparison.
     double left_val = ToDouble(LConstantOperand::cast(left));
     double right_val = ToDouble(LConstantOperand::cast(right));
     int next_block =
       EvalComparison(instr->op(), left_val, right_val) ? true_block
                                                        : false_block;
     EmitGoto(next_block);
   } else {
     if (instr->is_double()) {
+      CpuFeatures::Scope scope(SSE2);
       // Don't base result on EFLAGS when a NaN is involved. Instead
       // jump to the false block.
       __ ucomisd(ToDoubleRegister(left), ToDoubleRegister(right));
       __ j(parity_even, chunk_->GetAssemblyLabel(false_block));
     } else {
       if (right->IsConstantOperand()) {
         __ cmp(ToRegister(left), ToInteger32Immediate(right));
       } else if (left->IsConstantOperand()) {
         __ cmp(ToOperand(right), ToInteger32Immediate(left));
         // We transposed the operands. Reverse the condition.
@@ skipping 4013 matching lines @@
                               FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32