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[Bug rtl-optimization/57425] [4.8/4.9 regression] RTL alias analysis unprepared to handle stack slot sharing
- From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 27 May 2013 08:31:18 +0000
- Subject: [Bug rtl-optimization/57425] [4.8/4.9 regression] RTL alias analysis unprepared to handle stack slot sharing
- Auto-submitted: auto-generated
- References: <bug-57425-4 at http dot gcc dot gnu dot org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57425
--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Note that I only recently fixed a wrong alias query from using
> true_dependence to anti_dependence. Similar issues may exist elsewhere.
That would point to cselib_invalidate_mem then. It uses canon_true_dependence
but here we have an anti-dependence (WAR).