https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66552
--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #6)
> (In reply to Li Jia He from comment #5)
> > Could we consider doing this optimization on gimple? I use the following
> > code on gimple to produce optimized results on powerpc64.
>
> It might make sense. But fold-const.c might not be the correct location;
> match.pd might be a better place for it.
Something like:
(simplify
(rshift @0 (mod @1 integer_pow2p@2))
(rshift @0 (bit_and @1 (minus @1 { build_int_cst (TREE_TYPE (@1), 1); }))))
