https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93565
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> --- (In reply to Segher Boessenkool from comment #11) > (The original problem I have an idea for -- don't generate a parallel of > two SETs with equal SET_SRC -- but that doesn't handle the new case). For the new case, nonzero_bits should find out that the sign_extension is the same thing as zero_extension and it would be best to just do a single and e.g. on a paradoxical subreg of the source and a pseudo copy.
