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From: "sucicf1 at outlook dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/91882] boolean XOR tautology missed
 optimisation
Date: Wed, 05 Aug 2020 22:00:00 +0000
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X-Bugzilla-Component: tree-optimization
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X-Bugzilla-Keywords: easyhack, missed-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D91882

--- Comment #5 from Ivan Su=C4=8Di=C4=87 <sucicf1 at outlook dot com> ---
I have added in match.pd a simplify. But for unknown reason it doesn't get
applied.  Anybody knows why?=