[llvm] [VPlan] Compute interleave count for VPlan. (PR #149702)

[via llvm-commits]

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@@ -4866,8 +4865,39 @@ LoopVectorizationCostModel::selectInterleaveCount(VPlan &Plan, ElementCount VF,
 
     // Interleave until store/load ports (estimated by max interleave count) are
     // saturated.
-    unsigned NumStores = Legal->getNumStores();
-    unsigned NumLoads = Legal->getNumLoads();
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ayalz wrote:

Did getNumStores() and getNumLoads() become useless and should be dce'd?

Better outline as a utility of VPlan, or rather of VPRegionBlock, than have it expanded here in LoopVectorize.cpp?

https://github.com/llvm/llvm-project/pull/149702