[llvm] [AArch64][SelectionDAG] Implement vector splitting for histogram intrinsic (PR #103037)

[Max Beck-Jones via llvm-commits]

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@@ -4274,6 +4277,31 @@ SDValue DAGTypeLegalizer::SplitVecOp_VP_CttzElements(SDNode *N) {
                        DAG.getNode(ISD::ADD, DL, ResVT, VLo, ResHi));
 }
 
+SDValue DAGTypeLegalizer::SplitVecOp_VECTOR_HISTOGRAM(SDNode *N) {
+  MaskedHistogramSDNode *HG = cast<MaskedHistogramSDNode>(N);
+  SDLoc DL(HG);
+  SDValue Chain = HG->getChain();
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DevM-uk wrote:

Done.

https://github.com/llvm/llvm-project/pull/103037