[llvm] [VPlan] Explicitly replicate VPInstructions by VF. (PR #155102)

[via llvm-commits]

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@@ -3377,34 +3377,40 @@ void VPlanTransforms::materializeBuildVectors(VPlan &Plan) {
       vp_depth_first_shallow(Plan.getEntry()));
   auto VPBBsInsideLoopRegion = VPBlockUtils::blocksOnly<VPBasicBlock>(
       vp_depth_first_shallow(LoopRegion->getEntry()));
-  // Materialize Build(Struct)Vector for all replicating VPReplicateRecipes,
-  // excluding ones in replicate regions. Those are not materialized explicitly
-  // yet. Those vector users are still handled in VPReplicateRegion::execute(),
-  // via shouldPack().
+  // Materialize Build(Struct)Vector for all replicating VPReplicateRecipes and
+  // VPInstructions, excluding ones in replicate regions. Those are not
+  // materialized explicitly yet. Those vector users are still handled in
+  // VPReplicateRegion::execute(), via shouldPack().
   // TODO: materialize build vectors for replicating recipes in replicating
   // regions.
   // TODO: materialize build vectors for VPInstructions.
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ayalz wrote:

```suggestion
```
?

https://github.com/llvm/llvm-project/pull/155102