[llvm] [AArch64][SVE2p1] Allow more uses of mask in performActiveLaneMaskCombine (PR #159360)

[David Sherwood via llvm-commits]

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@@ -18774,7 +18774,7 @@ static SDValue performVecReduceAddCombineWithUADDLP(SDNode *N,
 static SDValue
 performActiveLaneMaskCombine(SDNode *N, TargetLowering::DAGCombinerInfo &DCI,
                              const AArch64Subtarget *ST) {
-  if (DCI.isBeforeLegalize())
+  if (DCI.isBeforeLegalize() && !!DCI.isBeforeLegalizeOps())
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david-arm wrote:

nit: The `!!` looks a little odd. Is it possible to just use `DCI.isBeforeLegalizeOps()`?

https://github.com/llvm/llvm-project/pull/159360