[llvm] [DAGCombiner][VP] Add DAGCombine for VP_MUL (PR #80105)

[Jianjian Guan via llvm-commits]

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@@ -4356,11 +4357,13 @@ SDValue DAGCombiner::visitMULFIX(SDNode *N) {
   return SDValue();
 }
 
-SDValue DAGCombiner::visitMUL(SDNode *N) {
+template <class MatchContextClass> SDValue DAGCombiner::visitMUL(SDNode *N) {
   SDValue N0 = N->getOperand(0);
   SDValue N1 = N->getOperand(1);
   EVT VT = N0.getValueType();
   SDLoc DL(N);
+  bool IsVP = ISD::isVPOpcode(N->getOpcode());
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jacquesguan wrote:

Done.

https://github.com/llvm/llvm-project/pull/80105