[Bug tree-optimization/86401] The "For constants M and N, if M == (1LL << cst) - 1 && (N & M) == M,..." opts are only in fold-const.c and in RTL

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86401

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44350
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44350&action=edit
gcc9-pr86401.patch

Untested fix.