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

src/compiler/ia32/code-generator-ia32.cc

 // Copyright 2013 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/compiler/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
@@ skipping 829 matching lines @@
         }
       }
     } else if (destination->IsRegister()) {
       Register dst = g.ToRegister(destination);
       __ mov(dst, g.ToImmediate(source));
     } else if (destination->IsStackSlot()) {
       Operand dst = g.ToOperand(destination);
       __ mov(dst, g.ToImmediate(source));
     } else {
       double v = g.ToDouble(source);
-      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);
       if (destination->IsDoubleRegister()) {
         XMMRegister dst = g.ToDoubleRegister(destination);
         __ Move(dst, v);
       } else {
         DCHECK(destination->IsDoubleStackSlot());
         Operand dst0 = g.ToOperand(destination);
         Operand dst1 = g.HighOperand(destination);
         __ mov(dst0, Immediate(lower));
@@ skipping 84 matching lines @@
 }
 
 
 void CodeGenerator::AddNopForSmiCodeInlining() { __ nop(); }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8