Review URL: http://codereview.chromium.org/8539008
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9965
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00
// Round up the requested size to fit the alignment.
size = RoundUp(size, kAlignment);
+ // If the allocation size is divisible by 8 then we return an 8-byte aligned
+ // address.
+ if (kPointerSize == 4 && kAlignment == 4) {
+ position_ += ((~size) & 4) & (reinterpret_cast<intptr_t>(position_) & 4);
+ } else {
+ ASSERT(kAlignment >= kPointerSize);
+ }
+
// Check if the requested size is available without expanding.
Address result = position_;
friend class Isolate;
friend class ZoneScope;
- // All pointers returned from New() have this alignment.
+ // All pointers returned from New() have this alignment. In addition, if the
+ // object being allocated has a size that is divisible by 8 then its alignment
+ // will be 8.
static const int kAlignment = kPointerSize;
// Never allocate segments smaller than this size in bytes.