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* [Bug tree-optimization/113379] New: `MIN<a,b> == MAX<a,b>` should be optimzed to `a == b`
@ 2024-01-13 16:53 pinskia at gcc dot gnu.org
2024-01-13 16:58 ` [Bug tree-optimization/113379] " pinskia at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-01-13 16:53 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113379
Bug ID: 113379
Summary: `MIN<a,b> == MAX<a,b>` should be optimzed to `a == b`
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: pinskia at gcc dot gnu.org
Target Milestone: ---
Take:
```
int f(int a, int b)
{
int c = a > b ? a : b;
int d = a < b ? a : b;
return c == d;
}
```
This should be optimized to `a == b;`
Likewise for the `!=` case too.
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug tree-optimization/113379] `MIN<a,b> == MAX<a,b>` should be optimzed to `a == b`
2024-01-13 16:53 [Bug tree-optimization/113379] New: `MIN<a,b> == MAX<a,b>` should be optimzed to `a == b` pinskia at gcc dot gnu.org
@ 2024-01-13 16:58 ` pinskia at gcc dot gnu.org
2024-01-15 8:36 ` rguenth at gcc dot gnu.org
2024-01-15 16:44 ` jsm28 at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2024-01-13 16:58 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113379
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The rest of the comparison operators:
`MIN <a, b> <= MAX <a, b>` should be simplified down to true.
`MIN <a, b> > MAX <a, b>` should be simplified down to false.
`MIN <a, b> < MAX <a, b>` should be simplified down to `a != b`
`MIN <a, b> >= MAX <a, b>` should be simplified down to `a == b`
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug tree-optimization/113379] `MIN<a,b> == MAX<a,b>` should be optimzed to `a == b`
2024-01-13 16:53 [Bug tree-optimization/113379] New: `MIN<a,b> == MAX<a,b>` should be optimzed to `a == b` pinskia at gcc dot gnu.org
2024-01-13 16:58 ` [Bug tree-optimization/113379] " pinskia at gcc dot gnu.org
@ 2024-01-15 8:36 ` rguenth at gcc dot gnu.org
2024-01-15 16:44 ` jsm28 at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2024-01-15 8:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113379
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2024-01-15
Ever confirmed|0 |1
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug tree-optimization/113379] `MIN<a,b> == MAX<a,b>` should be optimzed to `a == b`
2024-01-13 16:53 [Bug tree-optimization/113379] New: `MIN<a,b> == MAX<a,b>` should be optimzed to `a == b` pinskia at gcc dot gnu.org
2024-01-13 16:58 ` [Bug tree-optimization/113379] " pinskia at gcc dot gnu.org
2024-01-15 8:36 ` rguenth at gcc dot gnu.org
@ 2024-01-15 16:44 ` jsm28 at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2024-01-15 16:44 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113379
--- Comment #2 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
Note that some of these aren't valid for floating point in the presence of
NaNs.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2024-01-15 16:44 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2024-01-13 16:53 [Bug tree-optimization/113379] New: `MIN<a,b> == MAX<a,b>` should be optimzed to `a == b` pinskia at gcc dot gnu.org
2024-01-13 16:58 ` [Bug tree-optimization/113379] " pinskia at gcc dot gnu.org
2024-01-15 8:36 ` rguenth at gcc dot gnu.org
2024-01-15 16:44 ` jsm28 at gcc dot gnu.org
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