[PATCH] D38942: [DAG] Promote ADDCARRY / SUBCARRY

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

Oh, I see.  Yes, sign-extending should work: https://rise4fun.com/Alive/Ux9 .  Please add a your explanation as a comment (and fix the code so it actually sign-extends).


https://reviews.llvm.org/D38942