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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/112096] `(a || b) ? a : b` should be
 simplified to a
Date: Thu, 26 Oct 2023 20:22:18 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112096

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> ```
> int t01(int x, int y)
> {
>   bool t =3D x =3D=3D 5 && y =3D=3D 5;
>   if (t) return 5; return y;
> } // y
> ```
> Is able to be detected in phiopt2.  Just not the =3D=3D 0/!=3D0 case.

r0-125639-gc9ef86a1717dd6 added that code.
https://inbox.sourceware.org/gcc-patches/000001cebdbf$a3155310$e93ff930$@ar=
m.com/

I really have not read this code in over 10 years and I forgot I even revie=
wed
it slightly.

Anyways I am thinking about ways of improving this even further ...
And maybe even rewriting part of it since it has got way too complex.=