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* [Bug tree-optimization/112090] New: ``(1 >> X) != 0` pattern should be extended to support other constants
@ 2023-10-25 22:17 pinskia at gcc dot gnu.org
  2023-10-25 22:17 ` [Bug tree-optimization/112090] " pinskia at gcc dot gnu.org
  0 siblings, 1 reply; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-10-25 22:17 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112090

            Bug ID: 112090
           Summary: ``(1 >> X) != 0` pattern should be extended to support
                    other constants
           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: ---

We could extend it to support power of 2 constants or more.

Example:
```
int f(int a)
{
  return 2 != (2 >> a);
}
```

This could be optimized to `a != 0`

^ permalink raw reply	[flat|nested] 2+ messages in thread
* [Bug tree-optimization/112090] ``(1 >> X) != 0` pattern should be extended to support other constants
  2023-10-25 22:17 [Bug tree-optimization/112090] New: ``(1 >> X) != 0` pattern should be extended to support other constants pinskia at gcc dot gnu.org
@ 2023-10-25 22:17 ` pinskia at gcc dot gnu.org
  0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-10-25 22:17 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112090

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |pinskia at gcc dot gnu.org
   Last reconfirmed|                            |2023-10-25
     Ever confirmed|0                           |1

^ permalink raw reply	[flat|nested] 2+ messages in thread
end of thread, other threads:[~2023-10-25 22:17 UTC | newest]

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2023-10-25 22:17 [Bug tree-optimization/112090] New: ``(1 >> X) != 0` pattern should be extended to support other constants pinskia at gcc dot gnu.org
2023-10-25 22:17 ` [Bug tree-optimization/112090] " pinskia at gcc dot gnu.org

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