Correct the masks and conditions used to filter cross generation stores.

runtime/vm/assembler_ia32.cc

Index: runtime/vm/assembler_ia32.cc
diff --git a/runtime/vm/assembler_ia32.cc b/runtime/vm/assembler_ia32.cc
index 1f1429e9230784936beda7104efa8ef50732cb45..e832d6164feea11839e8b514660dae4ea44f3e8e 100644
--- a/runtime/vm/assembler_ia32.cc
+++ b/runtime/vm/assembler_ia32.cc
@@ -1394,11 +1394,11 @@ void Assembler::StoreIntoObject(Register object,
   // Check that 'value' is a new object.  Store buffer updates are not
   // required when storing a smi or an old object.
   testl(value, Immediate(kNewObjectAlignmentOffset | kHeapObjectTag));
-  j(NOT_EQUAL, &done, Assembler::kNearJump);
+  j(PARITY_ODD, &done, Assembler::kNearJump);
   // Check that 'object' is an old object.  A store buffer update is
   // not required when storing into a new object.
-  testl(object, Immediate(kOldObjectAlignmentOffset | kHeapObjectTag));
-  j(NOT_EQUAL, &done, Assembler::kNearJump);
+  testl(object, Immediate(kNewObjectAlignmentOffset));
+  j(NOT_ZERO, &done, Assembler::kNearJump);
   // A store buffer update is required.
   pushal();
   pushl(dest);  // Push argument
@@ -1416,9 +1416,9 @@ void Assembler::StoreIntoObjectNoBarrier(Register object,
 #if defined(DEBUG)
   Label done;
   testl(value, Immediate(kNewObjectAlignmentOffset | kHeapObjectTag));
-  j(NOT_EQUAL, &done, Assembler::kNearJump);
-  testl(object, Immediate(kOldObjectAlignmentOffset | kHeapObjectTag));
-  j(NOT_EQUAL, &done, Assembler::kNearJump);
+  j(PARITY_ODD, &done, Assembler::kNearJump);
+  testl(object, Immediate(kNewObjectAlignmentOffset));
+  j(NOT_ZERO, &done, Assembler::kNearJump);
   Stop("Store buffer update is required");
   Bind(&done);
 #endif