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From: "slyfox at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/110228] [13/14 Regression] llvm-16 miscompiled due
 to an maybe uninitialized variable
Date: Mon, 03 Jul 2023 21:52:46 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110228

--- Comment #25 from Sergei Trofimovich <slyfox at gcc dot gnu.org> ---
Specifically this bug.c.034t.ccp1's bit looks fishy:

...
Folding statement: LookupFlags_14 =3D 1;
Queued stmt for removal.  Folds to: 1
Folding statement: LookupFlags_15 =3D 0;
Queued stmt for removal.  Folds to: 0
Folding PHI node: LookupFlags_4 =3D PHI <0(4), LookupFlags_5(5), 1(6)>
No folding possible
Folding statement: *p_16(D) =3D LookupFlags_4;
Not folded
Folding statement: i_18 =3D i_6 + 1;
Not folded
Removing dead stmt:i_8 =3D 0;
Removing dead stmt:LookupFlags_14 =3D 1;
Removing dead stmt:LookupFlags_15 =3D 0;=