Use page header information to test for InNewSpace.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index bf88f01cb7363243b6d6e700de357ca9dc1c22ef..7b15d75a645ba5d4f58ddd50a9a234509eba788f 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -6016,7 +6016,9 @@ void RecordWriteStub::GenerateIncremental(MacroAssembler* masm) {
 
   Label value_in_old_space;
 
-  __ InNewSpace(value_, regs_.scratch0(), not_equal, &value_in_old_space);
+  __ CheckPageFlag(value_, regs_.scratch0(),
+                   MemoryChunk::IN_NEW_SPACE, zero,
+                   &value_in_old_space);
   // After this point the value_ register may have been overwritten since it is
   // also one of the scratch registers.
 
@@ -6055,7 +6057,9 @@ void RecordWriteStub::GenerateIncrementalValueIsInNewSpace(
   Label value_in_new_space_object_is_black_no_remembered_set;
 
   // The value is in new space.  Check the object.
-  __ InNewSpace(regs_.object(), regs_.scratch0(), equal, &both_in_new_space);
+  __ CheckPageFlag(regs_.object(), regs_.scratch0(),
+                   MemoryChunk::IN_NEW_SPACE, not_zero,
+                   &both_in_new_space);
 
   // Value is in new space, object is in old space.  Could we be lucky and find
   // the scan_on_scavenge flag on the object's page?
@@ -6200,10 +6204,9 @@ void RecordWriteStub::GenerateIncrementalValueIsInOldSpace(
   // object is in in order to find its colour.
   __ bind(&value_is_white);
   __ pop(regs_.object());
-  __ InNewSpace(regs_.object(),
-                regs_.scratch0(),
-                equal,
-                &value_in_old_space_and_white_object_in_new_space);
+  __ CheckPageFlag(regs_.object(), regs_.scratch0(),
+                   MemoryChunk::IN_NEW_SPACE, not_zero,
+                   &value_in_old_space_and_white_object_in_new_space);
 
   // Both in old space, value is white and can't be marked.
   __ InOldSpaceIsBlack(regs_.object(),