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

src/x87/lithium-gap-resolver-x87.cc

 // Copyright 2011 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_X87
 
 #include "src/x87/lithium-codegen-x87.h"
 #include "src/x87/lithium-gap-resolver-x87.h"
@@ skipping 274 matching lines @@
       Register dst = cgen_->ToRegister(destination);
       Representation r = cgen_->IsSmi(constant_source)
           ? Representation::Smi() : Representation::Integer32();
       if (cgen_->IsInteger32(constant_source)) {
         __ Move(dst, cgen_->ToImmediate(constant_source, r));
       } else {
         __ LoadObject(dst, cgen_->ToHandle(constant_source));
       }
     } else if (destination->IsDoubleRegister()) {
       double v = cgen_->ToDouble(constant_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);
       __ push(Immediate(upper));
       __ push(Immediate(lower));
       X87Register dst = cgen_->ToX87Register(destination);
       cgen_->X87Mov(dst, MemOperand(esp, 0));
       __ add(esp, Immediate(kDoubleSize));
     } else {
       DCHECK(destination->IsStackSlot());
       Operand dst = cgen_->ToOperand(destination);
@@ skipping 130 matching lines @@
   } else if (destination->IsRegister()) {
     source_uses_[destination->index()] = CountSourceUses(destination);
   }
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X87