https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79061
--- Comment #14 from Maxim Ostapenko <m.ostapenko at samsung dot com> ---
(In reply to Richard Biener from comment #13)
> (In reply to Maxim Ostapenko from comment #12)
> > Created attachment 40525 [details]
> > Untested fix 2.
> >
> > The patch I'm testing now.
>
> DECL_SOURCE_LOCATION is streamed for all decls already:
>
> if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
> stream_output_location (ob, &bp, DECL_SOURCE_LOCATION (expr));
Aha, right, thank you. But it seems that stream_output_location fails to find
it in the location cache that's probably caused by this line in lto.c:
/* We have the special case of size-1 SCCs that are pre-merged
by means of identifier and string sharing for example.
??? Maybe we should avoid streaming those as SCCs. */
tree first = streamer_tree_cache_get_tree (data_in->reader_cache,
from);
if (len == 1
&& (TREE_CODE (first) == IDENTIFIER_NODE
|| TREE_CODE (first) == INTEGER_CST
|| TREE_CODE (first) == TRANSLATION_UNIT_DECL))
continue;
that prohibits
/* Tree merging failed, mark entries in location cache as
permanent. */
data_in->location_cache.accept_location_cache ();
several lines below. Perhaps we can just remove TREE_CODE (first) ==
TRANSLATION_UNIT_DECL from the condition?
