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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/94834] Failure to optimize loop bswap pattern
Date: Wed, 29 Apr 2020 07:08:36 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94834

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |missed-optimization
   Last reconfirmed|                            |2020-04-29
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  We have a pass that would grok the unrolled form but unrolling
happens too late (if at all) for it to trigger.  Not sure if we should
try to pattern-match this (or other reductions) in loop distribution.=