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

test/cctest/test-assembler-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 1164 matching lines @@
 
   CodeDesc desc;
   assm.GetCode(&desc);
   Handle<Code> code = isolate->factory()->NewCode(
       desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
 #ifdef DEBUG
   OFStream os(stdout);
   code->Print(os);
 #endif
   F3 f = FUNCTION_CAST<F3>(code->entry());
-  t.left = BitCast<double>(kHoleNanInt64);
+  t.left = bit_cast<double>(kHoleNanInt64);
   t.right = 1;
   t.add_result = 0;
   t.sub_result = 0;
   t.mul_result = 0;
   t.div_result = 0;
   Object* dummy = CALL_GENERATED_CODE(f, &t, 0, 0, 0, 0);
   USE(dummy);
   const uint32_t kArmNanUpper32 = 0x7ff80000;
   const uint32_t kArmNanLower32 = 0x00000000;
 #ifdef DEBUG
   const uint64_t kArmNanInt64 =
       (static_cast<uint64_t>(kArmNanUpper32) << 32) | kArmNanLower32;
   DCHECK(kArmNanInt64 != kHoleNanInt64);
 #endif
   // With VFP2 the sign of the canonicalized Nan is undefined. So
   // we remove the sign bit for the upper tests.
-  CHECK_EQ(kArmNanUpper32, (BitCast<int64_t>(t.add_result) >> 32) & 0x7fffffff);
-  CHECK_EQ(kArmNanLower32, BitCast<int64_t>(t.add_result) & 0xffffffffu);
-  CHECK_EQ(kArmNanUpper32, (BitCast<int64_t>(t.sub_result) >> 32) & 0x7fffffff);
-  CHECK_EQ(kArmNanLower32, BitCast<int64_t>(t.sub_result) & 0xffffffffu);
-  CHECK_EQ(kArmNanUpper32, (BitCast<int64_t>(t.mul_result) >> 32) & 0x7fffffff);
-  CHECK_EQ(kArmNanLower32, BitCast<int64_t>(t.mul_result) & 0xffffffffu);
-  CHECK_EQ(kArmNanUpper32, (BitCast<int64_t>(t.div_result) >> 32) & 0x7fffffff);
-  CHECK_EQ(kArmNanLower32, BitCast<int64_t>(t.div_result) & 0xffffffffu);
+  CHECK_EQ(kArmNanUpper32,
+           (bit_cast<int64_t>(t.add_result) >> 32) & 0x7fffffff);
+  CHECK_EQ(kArmNanLower32, bit_cast<int64_t>(t.add_result) & 0xffffffffu);
+  CHECK_EQ(kArmNanUpper32,
+           (bit_cast<int64_t>(t.sub_result) >> 32) & 0x7fffffff);
+  CHECK_EQ(kArmNanLower32, bit_cast<int64_t>(t.sub_result) & 0xffffffffu);
+  CHECK_EQ(kArmNanUpper32,
+           (bit_cast<int64_t>(t.mul_result) >> 32) & 0x7fffffff);
+  CHECK_EQ(kArmNanLower32, bit_cast<int64_t>(t.mul_result) & 0xffffffffu);
+  CHECK_EQ(kArmNanUpper32,
+           (bit_cast<int64_t>(t.div_result) >> 32) & 0x7fffffff);
+  CHECK_EQ(kArmNanLower32, bit_cast<int64_t>(t.div_result) & 0xffffffffu);
 }
 
 
 TEST(15) {
   // Test the Neon instructions.
   CcTest::InitializeVM();
   Isolate* isolate = CcTest::i_isolate();
   HandleScope scope(isolate);
 
   typedef struct {
@@ skipping 335 matching lines @@
   assm.GetCode(&desc);
   Handle<Code> code = isolate->factory()->NewCode(
       desc, Code::ComputeFlags(Code::STUB), code_object);
   F1 f = FUNCTION_CAST<F1>(code->entry());
   int res = reinterpret_cast<int>(CALL_GENERATED_CODE(f, 21, 0, 0, 0, 0));
   ::printf("f() = %d\n", res);
   CHECK_EQ(42, res);
 }
 
 #undef __