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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/109008] [13 Regression] Wrong code in scipy
 package since r13-3926-gd4c2f1d376da6f
Date: Tue, 07 Mar 2023 19:39:30 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109008

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #54601|0                           |1
        is obsolete|                            |

--- Comment #24 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 54602
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D54602&action=3Dedit
gcc13-pr109008-wip.patch

And this version has both variants of foperator_minus hooked up as well.

Testcase could be e.g.:
double f1 (double eps) { double d =3D 1. + eps; if (d =3D=3D 1.) return eps=
; return
0.0; }
double f2 (double eps) { double d =3D 1. + eps; if (d =3D=3D 0x1.00001p0) r=
eturn eps;
return 0.0; }
double f3 (double eps) { double d =3D 1. + eps; if (d =3D=3D 2.) return eps=
; return
0.0; }
double f4 (double eps) { double d =3D 42. - eps; if (d =3D=3D 42.) return e=
ps; return
0.0; }
double f5 (double eps) { double d =3D 42. - eps; if (d =3D=3D 0x2a.0001p0) =
return
eps; return 0.0; }
double f6 (double eps) { double d =3D 42. - eps; if (d =3D=3D 43.) return e=
ps; return
0.0; }
double f7 (double eps) { double d =3D eps - 42.; if (d =3D=3D 42.) return e=
ps; return
0.0; }
double f8 (double eps) { double d =3D eps - 42.; if (d =3D=3D 0x2a.0001p0) =
return
eps; return 0.0; }
double f9 (double eps) { double d =3D eps - 42.; if (d =3D=3D 43.) return e=
ps; return
0.0; }=