[PATCH] D63141: [DAGCombine] GetNegatedExpression - add FMA\FMAD support

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

In D63141#1548152 <https://reviews.llvm.org/D63141#1548152>, @arsenm wrote:

> LGTM. Does everything still pass if you delete the FMA/FMAD case in AMDGPUTargetLowering::performFNegCombine?


Thanks for pointing that out - it made me realise there's an issue in that we're not checking for UnsafeMath/hasNoSignedZeros like we do for FADD.


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https://reviews.llvm.org/D63141