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

[Florian Hahn via llvm-commits]

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@@ -4111,30 +4129,33 @@ void VPlanTransforms::narrowInterleaveGroups(VPlan &Plan, ElementCount VF,
     //  * recipes writing to memory except interleave groups
     // Only support plans with a canonical induction phi.
     if (R.isPhi())
-      return;
+      return nullptr;
 
     auto *InterleaveR = dyn_cast<VPInterleaveRecipe>(&R);
     if (R.mayWriteToMemory() && !InterleaveR)
-      return;
-
-    // Do not narrow interleave groups if there are VectorPointer recipes and
-    // the plan was unrolled. The recipe implicitly uses VF from
-    // VPTransformState.
-    // TODO: Remove restriction once the VF for the VectorPointer offset is
-    // modeled explicitly as operand.
-    if (isa<VPVectorPointerRecipe>(&R) && Plan.getUF() > 1)
-      return;
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fhahn wrote:

Yep, this is no longer needed on current `main`.

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