Change RelocInfo to write 64-bit data field on x64 architecture.

src/globals.h

 // Copyright 2006-2009 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 93 matching lines @@
 // Constants
 
 const int KB = 1024;
 const int MB = KB * KB;
 const int GB = KB * KB * KB;
 const int kMaxInt = 0x7FFFFFFF;
 const int kMinInt = -kMaxInt - 1;
 
 const uint32_t kMaxUInt32 = 0xFFFFFFFFu;
 
-const int kCharSize     = sizeof(char);    // NOLINT
-const int kShortSize    = sizeof(short);   // NOLINT
-const int kIntSize      = sizeof(int);     // NOLINT
-const int kDoubleSize   = sizeof(double);  // NOLINT
-const int kPointerSize  = sizeof(void*);   // NOLINT
+const int kCharSize     = sizeof(char);      // NOLINT
+const int kShortSize    = sizeof(short);     // NOLINT
+const int kIntSize      = sizeof(int);       // NOLINT
+const int kDoubleSize   = sizeof(double);    // NOLINT
+const int kPointerSize  = sizeof(void*);     // NOLINT
+const int kIntptrSize   = sizeof(intptr_t);  // NOLINT
 
 #if V8_HOST_ARCH_64_BIT
 const int kPointerSizeLog2 = 3;
 #else
 const int kPointerSizeLog2 = 2;
 #endif
 
 const int kObjectAlignmentBits = kPointerSizeLog2;
 const intptr_t kObjectAlignment = 1 << kObjectAlignmentBits;
 const intptr_t kObjectAlignmentMask = kObjectAlignment - 1;
@@ skipping 425 matching lines @@
 
   Dest dest;
   memcpy(&dest, &source, sizeof(dest));
   return dest;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_GLOBALS_H_