[llvm] [VPlan] Impl VPlan-based pattern match for ExtendedRed and MulAccRed (PR #113903)

[Elvis Wang via llvm-commits]

================
@@ -155,6 +155,8 @@ bool VPRecipeBase::mayHaveSideEffects() const {
   case VPBlendSC:
   case VPReductionEVLSC:
   case VPReductionSC:
+  case VPExtendedReductionSC:
----------------
ElvisWang123 wrote:

Added, thanks!

https://github.com/llvm/llvm-project/pull/113903