X87: Improve write barriers in optimized code.

src/x87/lithium-codegen-x87.cc

Index: src/x87/lithium-codegen-x87.cc
diff --git a/src/x87/lithium-codegen-x87.cc b/src/x87/lithium-codegen-x87.cc
index a88613bc2ee3f394ede80474f4ede53e4f4e3f00..9fb1216e97449b35507ab2f5e269f9c8f2ddf5b9 100644
--- a/src/x87/lithium-codegen-x87.cc
+++ b/src/x87/lithium-codegen-x87.cc
@@ -3904,20 +3904,14 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
   if (instr->hydrogen()->has_transition()) {
     Handle<Map> transition = instr->hydrogen()->transition_map();
     AddDeprecationDependency(transition);
-    if (!instr->hydrogen()->NeedsWriteBarrierForMap()) {
-      __ mov(FieldOperand(object, HeapObject::kMapOffset), transition);
-    } else {
+    __ mov(FieldOperand(object, HeapObject::kMapOffset), transition);
+    if (instr->hydrogen()->NeedsWriteBarrierForMap()) {
       Register temp = ToRegister(instr->temp());
       Register temp_map = ToRegister(instr->temp_map());
       __ mov(temp_map, transition);
       __ mov(FieldOperand(object, HeapObject::kMapOffset), temp_map);
       // Update the write barrier for the map field.
-      __ RecordWriteField(object,
-                          HeapObject::kMapOffset,
-                          temp_map,
-                          temp,
-                          OMIT_REMEMBERED_SET,
-                          OMIT_SMI_CHECK);
+      __ RecordWriteForMap(object, transition, temp_map, temp);
     }
   }
 
@@ -3957,7 +3951,8 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
                         value,
                         temp,
                         EMIT_REMEMBERED_SET,
-                        instr->hydrogen()->SmiCheckForWriteBarrier());
+                        instr->hydrogen()->SmiCheckForWriteBarrier(),
+                        instr->hydrogen()->PointersToHereCheckForValue());
   }
 }
 
@@ -4155,7 +4150,8 @@ void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
                    key,
                    value,
                    EMIT_REMEMBERED_SET,
-                   check_needed);
+                   check_needed,
+                   instr->hydrogen()->PointersToHereCheckForValue());
   }
 }