[llvm] [VPlan] Run narrowInterleaveGroups during general VPlan optimizations. (PR #149706)

[via llvm-commits]

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@@ -4088,16 +4104,18 @@ static bool isAlreadyNarrow(VPValue *VPV) {
   return RepR && RepR->isSingleScalar();
 }
 
-void VPlanTransforms::narrowInterleaveGroups(VPlan &Plan, ElementCount VF,
-                                             unsigned VectorRegWidth) {
+std::unique_ptr<VPlan>
+VPlanTransforms::narrowInterleaveGroups(VPlan &Plan,
+                                        const TargetTransformInfo &TTI) {
+  using namespace llvm::VPlanPatternMatch;
   VPRegionBlock *VectorLoop = Plan.getVectorLoopRegion();
+
   if (!VectorLoop)
-    return;
+    return nullptr;
 
   VPTypeAnalysis TypeInfo(Plan);
-
-  unsigned VFMinVal = VF.getKnownMinValue();
   SmallVector<VPInterleaveRecipe *> StoreGroups;
+  std::optional<ElementCount> VFToOptimize;
   for (auto &R : *VectorLoop->getEntryBasicBlock()) {
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ayalz wrote:

(Independent) Checking recipes of entry BB only?

https://github.com/llvm/llvm-project/pull/149706