[llvm] [LV] Align legacy cost model to vplan-based model for gather/scatter w/ uniform addr. (PR #155739)

[Elvis Wang via llvm-commits]

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@@ -5256,8 +5256,11 @@ LoopVectorizationCostModel::getGatherScatterCost(Instruction *I,
   Type *ValTy = getLoadStoreType(I);
   auto *VectorTy = cast<VectorType>(toVectorTy(ValTy, VF));
   const Align Alignment = getLoadStoreAlignment(I);
-  const Value *Ptr = getLoadStorePointerOperand(I);
-  Type *PtrTy = toVectorTy(Ptr->getType(), VF);
+  Value *Ptr = getLoadStorePointerOperand(I);
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ElvisWang123 wrote:

Without this, will need `isUniform(const_cast<Value *>(Prt), VF)`
I am not sure which is better.

https://github.com/llvm/llvm-project/pull/155739