MIPS: Always require exact maps.

src/mips/stub-cache-mips.cc

Index: src/mips/stub-cache-mips.cc
diff --git a/src/mips/stub-cache-mips.cc b/src/mips/stub-cache-mips.cc
index 4a73be2dbe983798e99cf2dc7f6d37ccc9499411..30f30fef9afc99027f3870bab0ec0a2b8eeb5047 100644
--- a/src/mips/stub-cache-mips.cc
+++ b/src/mips/stub-cache-mips.cc
@@ -453,7 +453,7 @@ void StubCompiler::GenerateStoreTransition(MacroAssembler* masm,
 
   // Check that the map of the object hasn't changed.
   __ CheckMap(receiver_reg, scratch1, Handle<Map>(object->map()), miss_label,
-              DO_SMI_CHECK, REQUIRE_EXACT_MAP);
+              DO_SMI_CHECK);
 
   // Perform global security token check if needed.
   if (object->IsJSGlobalProxy()) {
@@ -656,7 +656,7 @@ void StubCompiler::GenerateStoreField(MacroAssembler* masm,
 
   // Check that the map of the object hasn't changed.
   __ CheckMap(receiver_reg, scratch1, Handle<Map>(object->map()), miss_label,
-              DO_SMI_CHECK, ALLOW_ELEMENT_TRANSITION_MAPS);
+              DO_SMI_CHECK);
 
   // Perform global security token check if needed.
   if (object->IsJSGlobalProxy()) {
@@ -1249,8 +1249,7 @@ Register StubCompiler::CheckPrototypes(Handle<JSObject> object,
       if (!current.is_identical_to(first) || check == CHECK_ALL_MAPS) {
         Handle<Map> current_map(current->map());
         // CheckMap implicitly loads the map of |reg| into |map_reg|.
-        __ CheckMap(reg, map_reg, current_map, miss, DONT_DO_SMI_CHECK,
-                    ALLOW_ELEMENT_TRANSITION_MAPS);
+        __ CheckMap(reg, map_reg, current_map, miss, DONT_DO_SMI_CHECK);
       } else {
         __ lw(map_reg, FieldMemOperand(reg, HeapObject::kMapOffset));
       }
@@ -1286,7 +1285,7 @@ Register StubCompiler::CheckPrototypes(Handle<JSObject> object,
   if (!holder.is_identical_to(first) || check == CHECK_ALL_MAPS) {
     // Check the holder map.
     __ CheckMap(reg, scratch1, Handle<Map>(holder->map()), miss,
-                DONT_DO_SMI_CHECK, ALLOW_ELEMENT_TRANSITION_MAPS);
+                DONT_DO_SMI_CHECK);
   }
 
   // Perform security check for access to the global object.
@@ -2849,7 +2848,7 @@ Handle<Code> StoreStubCompiler::CompileStoreInterceptor(
 
   // Check that the map of the object hasn't changed.
   __ CheckMap(receiver(), scratch1(), Handle<Map>(object->map()), &miss,
-              DO_SMI_CHECK, ALLOW_ELEMENT_TRANSITION_MAPS);
+              DO_SMI_CHECK);
 
   // Perform global security token check if needed.
   if (object->IsJSGlobalProxy()) {