http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49945
--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> 2011-12-01 10:32:45 UTC --- On Fri, 25 Nov 2011, jakub at gcc dot gnu.org wrote: > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49945 > > --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-11-25 > 09:59:31 UTC --- > This is a bug in lto-streamer-out.c. TYPE_MAXVAL of the ARRAY_TYPE's > TYPE_DOMAIN e.g. in f1 is a VAR_DECL (DECL_NAME is NULL, DECL_ARTIFICIAL, but > !DECL_IGNORED_P). It is first encountered in a GIMPLE_DEBUG's first operand, > it hasn't been seen yet, so that VAR_DECL is output. But, later on > write_global_stream calls lto_output_tree on the VLA ARRAY_TYPE, with ref_p > set > to false, and this eventually calls lto_output_tree on that VAR_DECL again. > But this doesn't find it in ob->writer_cache, because the cache has been > destroyed in between, from output_function -> destroy_output_block -> > lto_streamer_cache_delete. > I guess VLA types need to be emitted immediately in the containing function, > rather than being deferred to be written much later on globally. Yes, I remember running into this issue as well. And I have some patches somewhere that try to do this (but more generally, for all function-local types IIRC).
