[llvm] [VPlan] Treat VPVector(End)PointerRecipe as single-scalar, if ops are. (PR #169249)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-vectorizers

Author: Florian Hahn (fhahn)

<details>
<summary>Changes</summary>

VPVector(End)PointerRecipes are single-scalar if all their operands are. This should be effectively NFC currently, but it should re-enable cost checking for some more VPWidenMemoryRecipe after
https://github.com/llvm/llvm-project/pull/157387 as discovered by @<!-- -->john-brawn-arm.

---
Full diff: https://github.com/llvm/llvm-project/pull/169249.diff


1 Files Affected:

- (modified) llvm/lib/Transforms/Vectorize/VPlanUtils.cpp (+2-1) 


``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/VPlanUtils.cpp b/llvm/lib/Transforms/Vectorize/VPlanUtils.cpp
index 939216fe162a4..334ad973c5428 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanUtils.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanUtils.cpp
@@ -185,7 +185,8 @@ bool vputils::isSingleScalar(const VPValue *VPV) {
                                      all_of(Rep->operands(), isSingleScalar));
   }
   if (isa<VPWidenGEPRecipe, VPDerivedIVRecipe, VPBlendRecipe,
-          VPWidenSelectRecipe>(VPV))
+          VPWidenSelectRecipe, VPVectorPointerRecipe, VPVectorEndPointerRecipe>(
+          VPV))
     return all_of(VPV->getDefiningRecipe()->operands(), isSingleScalar);
   if (auto *WidenR = dyn_cast<VPWidenRecipe>(VPV)) {
     return preservesUniformity(WidenR->getOpcode()) &&

``````````

</details>


https://github.com/llvm/llvm-project/pull/169249