[Bug tree-optimization/98954] ((X << CST0) & CST1) == 0 is not optimized to 0 == (X & (CST1 >> CST0))

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98954

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 50271
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50271&action=edit
partial patch

This is the partial patch (and still need a testcase added too).
It fixes:
_Bool f(unsigned m)
{
    return !((m << 1) & 0xFF);
}