https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40635
--- Comment #27 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:0d14720f93a8139a7f234b2762c361e8e5da99cc commit r13-4495-g0d14720f93a8139a7f234b2762c361e8e5da99cc Author: Richard Biener <rguent...@suse.de> Date: Mon Dec 5 16:03:21 2022 +0100 middle-end/40635 - SSA update losing PHI arg loations The following fixes an issue where SSA update loses PHI argument locations when updating PHI nodes it didn't create as part of the SSA update. For the case where the reaching def is the same as the current argument opt to do nothing and for the case where the PHI argument already has a location keep that (that's an indication the PHI node wasn't created as part of the update SSA process). PR middle-end/40635 * tree-into-ssa.cc (rewrite_update_phi_arguments): Only update the argument when the reaching definition is different from the current argument. Keep an existing argument location. * gcc.dg/uninit-pr40635.c: New testcase.
