https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92676
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Martin Jambor <jamb...@gcc.gnu.org>: https://gcc.gnu.org/g:b90061c6ec090c6b41a44987c646c828e5165298 commit r10-7523-gb90061c6ec090c6b41a44987c646c828e5165298 Author: Martin Jambor <mjam...@suse.cz> Date: Thu Apr 2 17:52:38 2020 +0200 Prevent IPA-SRA from creating calls to local comdats (PR 92676) since r278669 (fix for PR ipa/91956), IPA-SRA makes sure that the clone it creates is put into the same same_comdat as the original cgraph_node, so that it can call private comdats (such as the ipa-split bits of a comdat that is private). However, that means that if there is non-comdat caller of a public comdat that is modified by IPA-SRA, it now finds itself calling a private comdat, which call graph verifier does not like (and for a reason, in theory it can disappear and since it is private it would not be available from other CUs). The patch fixes this by performing the fix for PR 91956 only when the node in question actually calls a local comdat and when it does, also making sure that no callers come from a different same_comdat (disabling IPA-SRA if both conditions are true), so that it plays by the rules in both modes, does not violate the private comdat calling rule and at the same time does not disable the transformation unnecessarily. The patch also fixes up the calls_comdat_local of callers of the modified node, despite that not triggering any known issues. 2020-04-02 Martin Jambor <mjam...@suse.cz> PR ipa/92676 * ipa-sra.c (struct caller_issues): New fields candidate and call_from_outside_comdat. (check_for_caller_issues): Check for calls from outsied of candidate's same_comdat_group. (check_all_callers_for_issues): Set up issues.candidate, check result of the new check. (mark_callers_calls_comdat_local): New function. (process_isra_node_results): Set calls_comdat_local of callers if appropriate.
