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From: "xxs_chy at outlook dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/115035] New: Missed optimization: fold
 min/max in phi
Date: Fri, 10 May 2024 15:08:34 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: xxs_chy at outlook dot com
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D115035

            Bug ID: 115035
           Summary: Missed optimization: fold min/max in phi
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: xxs_chy at outlook dot com
  Target Milestone: ---

Godbolt link: https://godbolt.org/z/o489f6sj5
```
bool src(unsigned a, unsigned b, bool c) {
    unsigned phi;
    if(c) {
        dummy();
        phi =3D a < 6 ? a : 6;
    } else {
        phi =3D b;
    }
    return phi < 6;
}
```

can be folded to:

```
bool tgt(unsigned a, unsigned b, bool c) {
    unsigned phi;
    if(c) {
        dummy();
        phi =3D a;
    } else {
        phi =3D b;
    }
    return phi < 6;
}
```=