Revision: 15343
Author: [email protected]
Date: Wed Jun 26 09:37:15 2013
Log: Remove obsolete free-space checks from MarkCompactCollector.
[email protected]
Review URL: https://codereview.chromium.org/17840004
http://code.google.com/p/v8/source/detail?r=15343
Modified:
/branches/bleeding_edge/src/mark-compact.cc
=======================================
--- /branches/bleeding_edge/src/mark-compact.cc Wed Jun 26 09:17:12 2013
+++ /branches/bleeding_edge/src/mark-compact.cc Wed Jun 26 09:37:15 2013
@@ -2391,7 +2391,6 @@
for (HeapObject* obj = map_iterator.Next();
obj != NULL;
obj = map_iterator.Next()) {
- if (obj->IsFreeSpace()) continue;
Map* map = Map::cast(obj);
STATIC_ASSERT(LAST_TYPE == LAST_JS_RECEIVER_TYPE);
@@ -2405,21 +2404,19 @@
void MarkCompactCollector::ClearNonLiveReferences() {
- HeapObjectIterator map_iterator(heap()->map_space());
// Iterate over the map space, setting map transitions that go from
// a marked map to an unmarked map to null transitions. This action
// is carried out only on maps of JSObjects and related subtypes.
+ HeapObjectIterator map_iterator(heap()->map_space());
for (HeapObject* obj = map_iterator.Next();
- obj != NULL; obj = map_iterator.Next()) {
- Map* map = reinterpret_cast<Map*>(obj);
- MarkBit map_mark = Marking::MarkBitFrom(map);
- if (map->IsFreeSpace()) continue;
+ obj != NULL;
+ obj = map_iterator.Next()) {
+ Map* map = Map::cast(obj);
- ASSERT(map->IsMap());
if (!map->CanTransition()) continue;
- if (map_mark.Get() &&
- map->attached_to_shared_function_info()) {
+ MarkBit map_mark = Marking::MarkBitFrom(map);
+ if (map_mark.Get() && map->attached_to_shared_function_info()) {
// This map is used for inobject slack tracking and has been detached
// from SharedFunctionInfo during the mark phase.
// Since it survived the GC, reattach it now.
--
--
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