X64: Disabled RSet in 64-bit mode.

src/spaces-inl.h

Index: src/spaces-inl.h
diff --git a/src/spaces-inl.h b/src/spaces-inl.h
index 3973658472cdf1343d036a73076074e148999d6a..2ecf9d1f7603b7d61ff4b250cb37abf92bf9ee9e 100644
--- a/src/spaces-inl.h
+++ b/src/spaces-inl.h
@@ -92,8 +92,10 @@ Address Page::AllocationTop() {
 
 
 void Page::ClearRSet() {
+#ifndef V8_HOST_ARCH_64_BIT
   // This method can be called in all rset states.
   memset(RSetStart(), 0, kRSetEndOffset - kRSetStartOffset);
+#endif
 }
 
 
@@ -194,7 +196,7 @@ bool MemoryAllocator::IsPageInSpace(Page* p, PagedSpace* space) {
 
 Page* MemoryAllocator::GetNextPage(Page* p) {
   ASSERT(p->is_valid());
-  int raw_addr = p->opaque_header & ~Page::kPageAlignmentMask;
+  intptr_t raw_addr = p->opaque_header & ~Page::kPageAlignmentMask;
   return Page::FromAddress(AddressFrom<Address>(raw_addr));
 }
 
@@ -207,7 +209,7 @@ int MemoryAllocator::GetChunkId(Page* p) {
 
 void MemoryAllocator::SetNextPage(Page* prev, Page* next) {
   ASSERT(prev->is_valid());
-  int chunk_id = prev->opaque_header & Page::kPageAlignmentMask;
+  int chunk_id = GetChunkId(prev);
   ASSERT_PAGE_ALIGNED(next->address());
   prev->opaque_header = OffsetFrom(next->address()) | chunk_id;
 }