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* [Bug tree-optimization/113380] New: `(a CMP CST) | (a*a CMP CST1)` is not optimized as decent as with `||`
@ 2024-01-13 17:01 pinskia at gcc dot gnu.org
2024-01-15 8:37 ` [Bug tree-optimization/113380] " rguenth at gcc dot gnu.org
2024-01-15 9:21 ` pinskia at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-01-13 17:01 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113380
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);
}
```
^ permalink raw reply [flat|nested] 3+ messages in thread
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2024-01-13 17:01 [Bug tree-optimization/113380] New: `(a CMP CST) | (a*a CMP CST1)` is not optimized as decent as with `||` pinskia at gcc dot gnu.org
2024-01-15 8:37 ` [Bug tree-optimization/113380] " rguenth at gcc dot gnu.org
2024-01-15 9:21 ` pinskia at gcc dot gnu.org
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