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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/114902] [14/15 Regression] wrong code at -O3
 with "-fno-tree-vrp -fno-expensive-optimizations -fno-tree-dominator-opts" on
 x86_64-linux-gnu
Date: Thu, 09 May 2024 09:48:47 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114902

--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> We go from CCGC with a sign_extend to a zero_extend with CCZ. that can't =
be
> right.

Why not?  We prefer zero_extend whenever it has the same result.=