> What does it mean for > (set (reg:QI) (const_int -128)) > for example? This is the canonical form of moving positive 128 into a > register as well, of course.
Nothing, since word_register_operation_p returns false on CONST_INTs . > W_R_O needs many more restrictions if it can work at all, but those aren't > documented. The problematic issue is more basic and pertains to mere SUBREGs. -- Eric Botcazou
