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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/107107] [10/11/12/13 Regression] Wrong
 codegen from TBAA when stores to distinct same-mode types are collapsed?
Date: Sat, 01 Oct 2022 03:05:28 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: unknown
X-Bugzilla-Keywords: alias, wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: pinskia at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 10.5
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 cf_reconfirmed_on everconfirmed
Message-ID: <bug-107107-4-5pn2aNo83o@http.gcc.gnu.org/bugzilla/>
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107107

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|middle-end                  |tree-optimization
            Summary|Wrong codegen from TBAA     |[10/11/12/13 Regression]
                   |when stores to distinct     |Wrong codegen from TBAA
                   |same-mode types are         |when stores to distinct
                   |collapsed?                  |same-mode types are
                   |                            |collapsed?
             Status|UNCONFIRMED                 |NEW
   Target Milestone|---                         |10.5
   Last reconfirmed|                            |2022-10-01
     Ever confirmed|0                           |1

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note this has been to be a regression since tree level PRE is what is causi=
ng
the issue and that was added in GCC 4 or 4.1.=