https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111123
--- Comment #5 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:abf915193fbf725bb359e6936e10dcc282eb94cc commit r14-3460-gabf915193fbf725bb359e6936e10dcc282eb94cc Author: Richard Biener <rguent...@suse.de> Date: Thu Aug 24 09:32:54 2023 +0200 tree-optimization/111123 - indirect clobbers thrown away too early The testcase in the PR shows that late uninit diagnostic relies on indirect clobbers in CTORs but we throw those away in the fab pass which is too early. The reasoning was they were supposed to keep SSA names live but that's no longer the case since DCE doesn't treat them as keeping SSA uses live. The following instead removes them before out-of-SSA coalescing which is the thing that's still affected by them. PR tree-optimization/111123 * tree-ssa-ccp.cc (pass_fold_builtins::execute): Do not remove indirect clobbers here ... * tree-outof-ssa.cc (rewrite_out_of_ssa): ... but here. (remove_indirect_clobbers): New function. * g++.dg/warn/Wuninitialized-pr111123-1.C: New testcase.
