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

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon updated this revision to Diff 216134.
RKSimon added a comment.

Updated patch to correctly respect NSZ flags. I've also improved the logic to ensure we negate the most profitable multiplication factor, not just the first one.


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D63141/new/

https://reviews.llvm.org/D63141

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  test/CodeGen/X86/fma-fneg-combine-2.ll

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