| Index: src/flag-definitions.h | 
| diff --git a/src/flag-definitions.h b/src/flag-definitions.h | 
| index d6e4a6d844cae20a12d59f330a9ce3c13db57740..95ca10fb8b64e2b814ad0b259d4b79abf6d5cb76 100644 | 
| --- a/src/flag-definitions.h | 
| +++ b/src/flag-definitions.h | 
| @@ -269,7 +269,7 @@ | 
| DEFINE_IMPLICATION(track_field_types, track_fields) | 
| DEFINE_IMPLICATION(track_field_types, track_heap_object_fields) | 
| DEFINE_BOOL(smi_binop, true, "support smi representation in binary operations") | 
| -DEFINE_BOOL(mark_shared_functions_for_tier_up, true, | 
| +DEFINE_BOOL(mark_shared_functions_for_tier_up, false, | 
| "mark shared functions for tier up") | 
|  | 
| // Flags for optimization types. | 
|  |