Replace our home-grown BitCast with bit_cast from Chrome/Google3.

src/ia32/lithium-codegen-ia32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_IA32
 
 #include "src/base/bits.h"
 #include "src/code-stubs.h"
@@ skipping 1697 matching lines @@
 }
 
 
 void LCodeGen::DoConstantS(LConstantS* instr) {
   __ Move(ToRegister(instr->result()), Immediate(instr->value()));
 }
 
 
 void LCodeGen::DoConstantD(LConstantD* instr) {
   double v = instr->value();
-  uint64_t int_val = BitCast<uint64_t, double>(v);
+  uint64_t int_val = bit_cast<uint64_t, double>(v);
   int32_t lower = static_cast<int32_t>(int_val);
   int32_t upper = static_cast<int32_t>(int_val >> (kBitsPerInt));
   DCHECK(instr->result()->IsDoubleRegister());
 
   XMMRegister res = ToDoubleRegister(instr->result());
   if (int_val == 0) {
     __ xorps(res, res);
   } else {
     Register temp = ToRegister(instr->temp());
     if (CpuFeatures::IsSupported(SSE4_1)) {
@@ skipping 3941 matching lines @@
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32