https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107323
--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-12 branch has been updated by Richard Biener <rgue...@gcc.gnu.org>: https://gcc.gnu.org/g:19a9b5e587e87f524425864dba989eeef8bfffbb commit r12-8855-g19a9b5e587e87f524425864dba989eeef8bfffbb Author: Richard Biener <rguent...@suse.de> Date: Fri Oct 21 09:45:44 2022 +0200 tree-optimization/107323 - loop distribution partition ordering issue The following reverts part of the PR94125 fix which causes us to use a bogus partition ordering after applying versioning for alias to the testcase in PR107323. Instead PR94125 is fixed by appropriately considering to be merged SCCs when skipping edges we want to ignore because of the alias versioning. PR tree-optimization/107323 * tree-loop-distribution.cc (pg_unmark_merged_alias_ddrs): New function. (loop_distribution::break_alias_scc_partitions): Revert postorder save/restore from the PR94125 fix. Instead make sure to not ignore edges from SCCs we are going to merge. * gcc.dg/tree-ssa/pr107323.c: New testcase. (cherry picked from commit 09f9814dc02c161ed78604c6df70b19b596f7524)
