[PATCH] D72312: [DAGCombine] Fold the (fma -x, y, -z) to -(fma x, y, z)

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


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Comment at: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:12645
+  if (!TLI.isFNegFree(VT) &&
+      TLI.isNegatibleForFree(SDValue(N, 0), DAG, LegalOperations,
+                             ForCodeSize) == 2)
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xbolva00 wrote:
> It would be better if this function returns enum constant to improve readability.
Yeah, thats been a pet peeve of mine as well for a long time - I'll take a look (might be after the release though)


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  https://reviews.llvm.org/D72312/new/

https://reviews.llvm.org/D72312