[llvm] [AArch64] Combine vector FNEG+FMA into `FNML[A|S]` (PR #167900)

[Gaëtan Bossu via llvm-commits]

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@@ -20444,6 +20437,52 @@ static SDValue performFADDCombine(SDNode *N,
   return SDValue();
 }
 
+static SDValue performFMACombine(SDNode *N,
+                                 TargetLowering::DAGCombinerInfo &DCI,
+                                 const AArch64Subtarget *Subtarget) {
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gbossu wrote:

Nit: I'm assuming we have the same combines somewhere for the integer MLA/MLS/MAD/MSB, maybe mention that in the PR description so that it appears in the final commit message?

https://github.com/llvm/llvm-project/pull/167900