[PATCH] D118037: [DAGCombine] Consider SETULT as carry flag

[Paweł Bylica via Phabricator via llvm-commits]

chfast added a comment.

In D118037#3294363 <https://reviews.llvm.org/D118037#3294363>, @RKSimon wrote:

> Maybe perform this inside X86ISelLowering?

I'm totally inexperienced with X86ISelLowering but I'm guessing I'd need to duplicate some/all DAGCombine match patters which take carry flag into account. These tend to be quite complex.


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