New attempt to make the allocation routines 64 bit clean....

src/mark-compact.cc

Index: src/mark-compact.cc
===================================================================
--- src/mark-compact.cc	(revision 5551)
+++ src/mark-compact.cc	(working copy)
@@ -167,8 +167,8 @@
   // reclaiming the waste and free list blocks).
   static const int kFragmentationLimit = 15;        // Percent.
   static const int kFragmentationAllowed = 1 * MB;  // Absolute.
-  int old_gen_recoverable = 0;
-  int old_gen_used = 0;
+  intptr_t old_gen_recoverable = 0;
+  intptr_t old_gen_used = 0;
 
   OldSpaces spaces;
   for (OldSpace* space = spaces.next(); space != NULL; space = spaces.next()) {
@@ -2008,8 +2008,10 @@
 
 #ifdef DEBUG
       if (FLAG_gc_verbose) {
-        PrintF("update %p : %p -> %p\n", obj->address(),
-              map, new_map);
+        PrintF("update %p : %p -> %p\n",
+               obj->address(),
+               reinterpret_cast<void*>(map),
+               reinterpret_cast<void*>(new_map));
       }
 #endif
     }
@@ -2068,8 +2070,8 @@
                             &UpdatePointerToNewGen,
                             Heap::WATERMARK_SHOULD_BE_VALID);
 
-  int live_maps_size = Heap::map_space()->Size();
-  int live_maps = live_maps_size / Map::kSize;
+  intptr_t live_maps_size = Heap::map_space()->Size();
+  int live_maps = static_cast<int>(live_maps_size / Map::kSize);
   ASSERT(live_map_objects_size_ == live_maps_size);
 
   if (Heap::map_space()->NeedsCompaction(live_maps)) {