[llvm] [TTI] Use MemIntrinsicCostAttributes for getMaskedMemoryOpCost (PR #168029)

[Shih-Po Hung via llvm-commits]

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@@ -3686,7 +3688,7 @@ InstructionCost VPWidenLoadEVLRecipe::computeCost(ElementCount VF,
   unsigned AS = cast<PointerType>(Ctx.Types.inferScalarType(getAddr()))
                     ->getAddressSpace();
   InstructionCost Cost = Ctx.TTI.getMaskedMemoryOpCost(
-      Instruction::Load, Ty, Alignment, AS, Ctx.CostKind);
+      {Intrinsic::vp_load, Ty, Alignment, AS}, Ctx.CostKind);
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arcbbb wrote:

Good catch. vp_load in getMaskedMemoryOpCost would surprise backends.
I've added a FIXME.
The rename to getMemIntrinsicCost will make this clear.

https://github.com/llvm/llvm-project/pull/168029