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* [Bug tree-optimization/112418] New: factor_out_conditional_operation could be done for more phis
@ 2023-11-07 2:40 pinskia at gcc dot gnu.org
2023-11-07 2:40 ` [Bug tree-optimization/112418] " pinskia at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-11-07 2:40 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112418
Bug ID: 112418
Summary: factor_out_conditional_operation could be done for
more phis
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: enhancement
Priority: P3
Component: tree-optimization
Assignee: pinskia at gcc dot gnu.org
Reporter: pinskia at gcc dot gnu.org
Depends on: 112324
Target Milestone: ---
Take:
```
int f(int a, int b, int d)
{
int c;
if (a < 0)
{
c = d > 0 ? d : -d;
a = -a;
}
else
{
c = d > 0 ? d : -d;
a = a;
}
return a + c;
}
```
We should be able to optimize this to just:
```
_11 = ABS_EXPR <a_3(D)>;
c_2 = ABS_EXPR <d_4(D)>;
_9 = c_2 + _11;
```
in phiopt1
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/112418] factor_out_conditional_operation could be done for more phis
2023-11-07 2:40 [Bug tree-optimization/112418] New: factor_out_conditional_operation could be done for more phis pinskia at gcc dot gnu.org
@ 2023-11-07 2:40 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-11-07 2:40 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112418
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2023-11-07
Status|UNCONFIRMED |ASSIGNED
Ever confirmed|0 |1
--- 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 2:40 [Bug tree-optimization/112418] New: factor_out_conditional_operation could be done for more phis pinskia at gcc dot gnu.org
2023-11-07 2:40 ` [Bug tree-optimization/112418] " pinskia at gcc dot gnu.org
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