[Bug tree-optimization/112090] New: ``(1 >> X) != 0` pattern should be extended to support other constants

[pinskia at gcc dot gnu.org via 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`