[Bug rtl-optimization/101806] Extra zero extends for some arguments in some cases

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101806

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Even a simple:
unsigned char g(unsigned char a, unsigned char b)
{
  return ((~a) & b)&1;
}

Produces the extra zero extend.

But it is ok with:
unsigned char g(unsigned char *a, unsigned char *b)
{
  return ((~*a) & *b)&1;
}

It looks like it is hard register related too ...