https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117547
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think the error is with const_0_to_255_operand which seems to operate
without context of the mode a VOIDmode CONST_INT is need to be interpreted
with. Alternatively every operand with such (or similar) predicate would
have to undergo trunc_int_for_mode - but I see both match_operand:SI
with const_0_to_255_operand and modeless match_operand.
Note const_0_to_255_operand gets passed the mode, but I'm not sure how
to access this in
(define_predicate "const_0_to_255_operand"
(and (match_code "const_int")
(match_test "IN_RANGE (INTVAL (op), 0, 255)")))
