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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/105638] Redundant stores aren't removed by DSE
Date: Wed, 18 May 2022 12:42:03 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105638

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2022-05-18
     Ever confirmed|0                           |1
           Keywords|                            |missed-optimization

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
DSE doesn't remove redundant stores, in some cases it can prune an earlier
store but that's only handled in a limited set of cases.  The issue with
removing redundant stores is that side-effects on the effective dynamic type
have to be preserved so removing earlier stores is much better.=