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* [Bug tree-optimization/112389] New: `(x | z) < (x >> y)` should be optimized to 0
@ 2023-11-05 2:08 pinskia at gcc dot gnu.org
2023-11-05 2:08 ` [Bug tree-optimization/112389] " pinskia at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-11-05 2:08 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112389
Bug ID: 112389
Summary: `(x | z) < (x >> y)` should be optimized to 0
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: pinskia at gcc dot gnu.org
Target Milestone: ---
Take:
```
unsigned f(unsigned x, unsigned y, unsigned z)
{
return (x | z) < (x >> y);
}
unsigned g(unsigned x, unsigned y, unsigned z)
{
return (x) < (x >> y);
}
```
We can optimize g during EVRP (and dom) to 0. But we could in theory pattern
match f and g too.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug tree-optimization/112389] `(x | z) < (x >> y)` should be optimized to 0
2023-11-05 2:08 [Bug tree-optimization/112389] New: `(x | z) < (x >> y)` should be optimized to 0 pinskia at gcc dot gnu.org
@ 2023-11-05 2:08 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-11-05 2:08 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112389
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
Keywords| |missed-optimization
^ permalink raw reply [flat|nested] 2+ messages in thread
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2023-11-05 2:08 [Bug tree-optimization/112389] New: `(x | z) < (x >> y)` should be optimized to 0 pinskia at gcc dot gnu.org
2023-11-05 2:08 ` [Bug tree-optimization/112389] " pinskia at gcc dot gnu.org
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