[llvm-branch-commits] [llvm] [AArch64][llvm] Combine SVE AND-NOT operations into BIC for _x forms (PR #232526)

[via llvm-branch-commits]

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@@ -22123,6 +22123,19 @@ static SDValue performReinterpretCastCombine(SDNode *N) {
 static SDValue performSVEAndCombine(SDNode *N,
                                     TargetLowering::DAGCombinerInfo &DCI) {
   SelectionDAG &DAG = DCI.DAG;
+
+  // Fold AND of a predicated NOT into BIC when NOT's inactive lanes do not
+  // matter, leaving standalone NOTs available for predicated selection.
+  for (unsigned I = 0; I != 2; ++I) {
+    SDValue Not = N->getOperand(I);
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CarolineConcatto wrote:

This could crash if the instruction has for some reason dont have N->getOperand(I)?

https://github.com/llvm/llvm-project/pull/232526