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* [Bug tree-optimization/112416] New: absu is not detected
@ 2023-11-07 1:19 pinskia at gcc dot gnu.org
2023-11-18 6:28 ` [Bug tree-optimization/112416] " pinskia at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-11-07 1:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112416
Bug ID: 112416
Summary: absu is not detected
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
Blocks: 112324
Target Milestone: ---
Target: aarch64
Another case where ABSU is not detected:
```
static inline
int f(int a)
{
return (a<0)?-(unsigned)a : a;
}
void f1(int *a, int n)
{
for(int i = 0; i < n; i++)
a[i] = f(a[i]);
}
static inline
int g(int a)
{
return (a<0)?-a : a;
}
void g1(int *a, int n)
{
for(int i = 0; i < n; i++)
a[i] = g(a[i]);
}
```
As you can see abs is detected for g/g1 but not for f/f1.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112324
[Bug 112324] phiopt fail to recog if (b < 0) max = MAX(-b, max); else max = MAX
(b, max) into max = MAX (ABS(b), max)
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug tree-optimization/112416] absu is not detected
2023-11-07 1:19 [Bug tree-optimization/112416] New: absu is not detected pinskia at gcc dot gnu.org
@ 2023-11-18 6:28 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-11-18 6:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112416
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Status|UNCONFIRMED |ASSIGNED
CC| |pinskia at gcc dot gnu.org
Last reconfirmed| |2023-11-18
Assignee|unassigned at gcc dot gnu.org |pinskia at gcc dot gnu.org
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Mine.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2023-11-07 1:19 [Bug tree-optimization/112416] New: absu is not detected pinskia at gcc dot gnu.org
2023-11-18 6:28 ` [Bug tree-optimization/112416] " pinskia at gcc dot gnu.org
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