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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/113380] New: `(a CMP CST) |  (a*a CMP CST1)`
 is not optimized as decent as with `||`
Date: Sat, 13 Jan 2024 17:01:39 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: pinskia at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113380

            Bug ID: 113380
           Summary: `(a CMP CST) |  (a*a CMP CST1)` is not optimized as
                    decent as with `||`
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

Take:
```
int foo(int a)
{
   return (a < 4) | (a * a > 7);
}

int bar(int a)
{
   return (a < 4) | (a * a < 7);
}

int baz(int a)
{
   return (a > -4) | (a * a > 7);
}

int qux(int a)
{
   return (a > -4) | (a * a < 7);
}
```

This is not as optimized as:
```
int foo(int a)
{
   return (a < 4) || (a * a > 7);
}

int bar(int a)
{
   return (a < 4) || (a * a < 7);
}

int baz(int a)
{
   return (a > -4) || (a * a > 7);
}

int qux(int a)
{
   return (a > -4) || (a * a < 7);
}
```=