[PATCH] D57789: [CGP] form usub with overflow from sub+icmp

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

Independent of this patch, but just so everyone's aware - there's currently no consistency in the way we transform to the overflow intrinsics. We may transform to sadd.with.overflow as an IR canonicalization (no target checks):
https://godbolt.org/z/2ajU23

I don't think there's any place in the IR optimizer or backend that creates ssub.with.overflow from raw ops at the moment.


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https://reviews.llvm.org/D57789