Hi! On Fri, Mar 20, 2020 at 07:42:25PM -0700, Richard Henderson via Gcc-patches wrote: > Duplicate all usub_*_carryinC, but use xzr for the output when we > only require the flags output. The signed versions use sign_extend > instead of zero_extend for combine's benefit.
You actually use ANY_EXTEND, which makes a lot more sense :-) Did you see combine create a sign_extend, ever? Or do those just come from combining other insns that already contain a sign_extend? Segher
