[PATCH] D37317: [X86] Don't pull carry through X86ISD::ADD carryin, -1 if we can't guranteed we're really using the carry flag from the add.

[Hans Wennborg via Phabricator via llvm-commits]

hans added a comment.

The X86ISelLowering.cpp change looks good to me.

I haven't looked closely at the test; if it already passes on trunk, that does seem like a problem :-)


https://reviews.llvm.org/D37317