Fix 64-bit compile.

src/mark-compact.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"
 
 #include "src/base/atomicops.h"
 #include "src/code-stubs.h"
 #include "src/compilation-cache.h"
 #include "src/cpu-profiler.h"
@@ skipping 3956 matching lines @@
   ASSERT((first_set_bit & cell) == first_set_bit);
   int live_objects = MarkWordToObjectStarts(first_set_bit, offsets);
   ASSERT(live_objects == 1);
   USE(live_objects);
   return block_address + offsets[0] * kPointerSize;
 }
 
 
 // Force instantiation of templatized SweepConservatively method for
 // SWEEP_ON_MAIN_THREAD mode.
-template intptr_t MarkCompactCollector::
+template int MarkCompactCollector::
     SweepConservatively<MarkCompactCollector::SWEEP_ON_MAIN_THREAD>(
         PagedSpace*, FreeList*, Page*);
 
 
 // Force instantiation of templatized SweepConservatively method for
 // SWEEP_IN_PARALLEL mode.
-template intptr_t MarkCompactCollector::
+template int MarkCompactCollector::
     SweepConservatively<MarkCompactCollector::SWEEP_IN_PARALLEL>(
         PagedSpace*, FreeList*, Page*);
 
 
 // Sweeps a space conservatively.  After this has been done the larger free
 // spaces have been put on the free list and the smaller ones have been
 // ignored and left untouched.  A free space is always either ignored or put
 // on the free list, never split up into two parts.  This is important
 // because it means that any FreeSpace maps left actually describe a region of
 // memory that can be ignored when scanning.  Dead objects other than free
@@ skipping 585 matching lines @@
   while (buffer != NULL) {
     SlotsBuffer* next_buffer = buffer->next();
     DeallocateBuffer(buffer);
     buffer = next_buffer;
   }
   *buffer_address = NULL;
 }
 
 
 } }  // namespace v8::internal