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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/88403] [Mips,AArch64] The gcse and
 division/mod by 1000 prevents if-conversion
Date: Fri, 02 Jun 2023 04:42:54 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: rtl-optimization
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X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: pinskia at gcc dot gnu.org
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D88403

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2023-06-02
           Severity|normal                      |enhancement
     Ever confirmed|0                           |1
            Summary|[Mips,AArch64] The gcse     |[Mips,AArch64] The gcse and
                   |prevents if-conversion      |division/mod by 1000
                   |                            |prevents if-conversion
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
GCSE is doing the right thing, just ifcvt can't handle this currently.

Here is a reduced testcase:
```
int f(int a, int b)
{
        if (a % 10000 > 10000/2)
          a+=3D 10000/2;
        return a / 10000;
}
```=