https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105990
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Hongtao.liu from comment #1)
> foo() also can be eliminated.
This one is similar to PR 105832 really.
```
_2 = (int) a.2_1;
_3 = 2 >> _2;
if (_3 == 2)
goto <bb 4>; [34.00%]
else
goto <bb 6>; [66.00%]
<bb 4> [local count: 182536112]:
_4 = 1 << _2;
iftmp.1_10 = (char) _4;
if (iftmp.1_10 == 0)
goto <bb 5>; [33.00%]
else
goto <bb 6>; [67.00%]
```
`(2 >> _2) == 2` could be optimized to just `_2 == 0`.
And then `_4` becomes `1` and then the conditional is optimized away and such.
