Migrate flag from bit_field2 to bit_field3

R=ager@chromium.org
BUG=none
TEST=none

Review URL: http://codereview.chromium.org/7064029

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8049 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/objects-inl.h

@@ -2540,14 +2540,14 @@ bool Map::attached_to_shared_function_info() {
 
 void Map::set_is_shared(bool value) {
   if (value) {
-    set_bit_field2(bit_field2() | (1 << kIsShared));
+    set_bit_field3(bit_field3() | (1 << kIsShared));
   } else {
-    set_bit_field2(bit_field2() & ~(1 << kIsShared));
+    set_bit_field3(bit_field3() & ~(1 << kIsShared));
   }
 }
 
 bool Map::is_shared() {
-  return ((1 << kIsShared) & bit_field2()) != 0;
+  return ((1 << kIsShared) & bit_field3()) != 0;
 }
 
 

src/objects.cc

@@ -2535,8 +2535,8 @@ bool NormalizedMapCache::CheckHit(Map* slow,
                                     fast->inobject_properties()) &&
     slow->instance_type() == fast->instance_type() &&
     slow->bit_field() == fast->bit_field() &&
-    slow->bit_field3() == fast->bit_field3() &&
-    (slow->bit_field2() & ~(1<<Map::kIsShared)) == fast->bit_field2();
+    slow->bit_field2() == fast->bit_field2() &&
+    (slow->bit_field3() & ~(1<<Map::kIsShared)) == fast->bit_field3();
 }
 
 

src/objects.h

@@ -3989,8 +3989,10 @@ class Map: public HeapObject {
   static const int kHasFastElements = 2;
   static const int kStringWrapperSafeForDefaultValueOf = 3;
   static const int kAttachedToSharedFunctionInfo = 4;
-  static const int kIsShared = 5;
-  static const int kHasExternalArrayElements = 6;
+  static const int kHasExternalArrayElements = 5;
+
+  // Bit positions for bit field 3
+  static const int kIsShared = 1;
 
   // Layout of the default cache. It holds alternating name and code objects.
   static const int kCodeCacheEntrySize = 2;