[PATCH] D95690: [LoopVectorize] improve IR fast-math-flags propagation in reductions

[Dave Green via Phabricator via llvm-commits]

dmgreen added a subscriber: nikic.
dmgreen added a comment.

> I think there was some problem dealing with the intrinsics in SDAG, but I don't remember the details. cc'ing @aemerson @RKSimon @craig.topper for a better answer.

I think that might have been true originally, but I believe @nikic improved things significantly with the lowering in ISel. I'm not sure if there were other issues, but it seems like it should be viable - and possibly more efficient to do the lowering in ISel. It's only expanding an instruction after all. ISel is pretty good at that kind of thing!


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  https://reviews.llvm.org/D95690/new/

https://reviews.llvm.org/D95690