[llvm] [AArch64][SVE] Handle some cases of uzp1/reinterpret from svbool in isZeroingInactiveLanes (PR #78623)

[Usman Nadeem via llvm-commits]

================
@@ -283,6 +283,24 @@ static bool isZeroingInactiveLanes(SDValue Op) {
     switch (Op.getConstantOperandVal(0)) {
     default:
       return false;
+
+    case Intrinsic::aarch64_sve_uzp1:
+      return isZeroingInactiveLanes(Op.getOperand(1)) &&
+             isZeroingInactiveLanes(Op.getOperand(2));
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UsmanNadeem wrote:

Posted an instcombine version: https://github.com/llvm/llvm-project/pull/81069

https://github.com/llvm/llvm-project/pull/78623