https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108772
--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:33ca5c92dfa7e2f591a838bb768d9d6eea56793b commit r13-6438-g33ca5c92dfa7e2f591a838bb768d9d6eea56793b Author: Richard Biener <rguent...@suse.de> Date: Wed Mar 1 10:01:10 2023 +0100 debug/108772 - ICE with late debug generated with -flto When combining -g1 with -flto we run into the DIE location annotation machinery for globals calling dwarf2out_late_global_decl but not having any early generated DIE for function scope statics. In this process we'd generate a limbo DIE since also the function scope doesn't have any early generated DIE. The limbo handling then tries to force a DIE for the context chain which ultimatively fails and ICEs at the std namespace decl because at -g1 we don't represent that. The following avoids this situation by making sure to never generate any DIEs from dwarf2out_late_global_decl in the in_lto_p path for function scope globals but rely on DIE generation for the function to output a DIE for the local static (which doesn't happen for -g1). I explored a lot of other options to fix this but in the end this seems to be the most spot-on fix with the least risk of unwanted effects. PR debug/108772 * dwarf2out.cc (dwarf2out_late_global_decl): Do not generate a DIE for a function scope static. * g++.dg/lto/pr108772_0.C: New testcase.
