[PATCH] D61447: [FPEnv] WIP on threading fneg through llvm

[Cameron McInally via Phabricator via llvm-commits]

cameron.mcinally added a comment.

In D61447#1488502 <https://reviews.llvm.org/D61447#1488502>, @cameron.mcinally wrote:

> @spatel I'm not a PatternMatch expert, but I think that change is what we wanted. That is, to continue to match `FSub(-0.0, X)` as an `FNeg(X)`.


Just FYI that an equivalent patch was made to the PatternMatcher in D61520 <https://reviews.llvm.org/D61520>. I needed this for some FNeg constant folding work. Thanks for the inspirations, Kevin.


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  rL LLVM

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https://reviews.llvm.org/D61447