diff options
Diffstat (limited to 'gcc/tree-streamer-out.c')
| -rw-r--r-- | gcc/tree-streamer-out.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/gcc/tree-streamer-out.c b/gcc/tree-streamer-out.c index ab9b7476635..bfd06449ecb 100644 --- a/gcc/tree-streamer-out.c +++ b/gcc/tree-streamer-out.c @@ -317,13 +317,9 @@ pack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr) bp_pack_value (bp, TYPE_RESTRICT (expr), 1); bp_pack_value (bp, TYPE_USER_ALIGN (expr), 1); bp_pack_value (bp, TYPE_READONLY (expr), 1); - /* Make sure to preserve the fact whether the frontend would assign - alias-set zero to this type. Do that only for main variants, because - type variants alias sets are never computed. - FIXME: This does not work for pre-streamed builtin types. */ - bp_pack_value (bp, (TYPE_ALIAS_SET (expr) == 0 - || (!in_lto_p && TYPE_MAIN_VARIANT (expr) == expr - && get_alias_set (expr) == 0)), 1); + /* We used to stream TYPE_ALIAS_SET == 0 information to let frontends mark + types that are opaque for TBAA. This however did not work as intended, + becuase TYPE_ALIAS_SET == 0 was regularly lost in type merging. */ if (RECORD_OR_UNION_TYPE_P (expr)) { bp_pack_value (bp, TYPE_TRANSPARENT_AGGR (expr), 1); |