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* [Bug tree-optimization/110965] New: missing combining if ranges due to cast differences
@ 2023-08-10 6:17 pinskia at gcc dot gnu.org
2023-08-10 6:18 ` [Bug tree-optimization/110965] " pinskia at gcc dot gnu.org
2023-08-10 7:02 ` pinskia at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-08-10 6:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110965
Bug ID: 110965
Summary: missing combining if ranges due to cast differences
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 f(long long l)
{
int t = (int)l;
if (t == 1 || t == 2)
return true;
if (t == 3)
return true;
return false;
}
int f1(long long l)
{
unsigned t = (unsigned)l;
if (t == 1 || t == 2)
return true;
if (t == 3)
return true;
return false;
}
```
f and f1 should produce the same code but currently does not.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug tree-optimization/110965] missing combining if ranges due to cast differences
2023-08-10 6:17 [Bug tree-optimization/110965] New: missing combining if ranges due to cast differences pinskia at gcc dot gnu.org
@ 2023-08-10 6:18 ` pinskia at gcc dot gnu.org
2023-08-10 7:02 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-08-10 6:18 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110965
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note I found this while working on PR 83247 because of the Ada failures.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug tree-optimization/110965] missing combining if ranges due to cast differences
2023-08-10 6:17 [Bug tree-optimization/110965] New: missing combining if ranges due to cast differences pinskia at gcc dot gnu.org
2023-08-10 6:18 ` [Bug tree-optimization/110965] " pinskia at gcc dot gnu.org
@ 2023-08-10 7:02 ` pinskia at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-08-10 7:02 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110965
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Blah, here is a testcase which shows this is causing a regression in GCC 14
(after r14-1597-g64d90d06d2db43):
```
bool f(long long l){
int t = (int)l;
if (t == 1)
return true;
if (t == 2)
return true;
if (t == 3)
return true;
return false;
}
```
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-08-10 7:02 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2023-08-10 6:17 [Bug tree-optimization/110965] New: missing combining if ranges due to cast differences pinskia at gcc dot gnu.org
2023-08-10 6:18 ` [Bug tree-optimization/110965] " pinskia at gcc dot gnu.org
2023-08-10 7:02 ` pinskia at gcc dot gnu.org
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