[llvm] [TTI] Use MemIntrinsicCostAttributes for getGatherScatterOpCost (PR #168650)

[Simon Pilgrim via llvm-commits]

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@@ -1598,8 +1603,10 @@ class BasicTTIImplBase : public TargetTransformInfoImplCRTPBase<T> {
     // For a target without strided memory operations (or for an illegal
     // operation type on one which does), assume we lower to a gather/scatter
     // operation.  (Which may in turn be scalarized.)
-    return thisT()->getGatherScatterOpCost(Opcode, DataTy, Ptr, VariableMask,
-                                           Alignment, CostKind, I);
+    unsigned IID = Opcode == Instruction::Load ? Intrinsic::masked_gather
+                                               : Intrinsic::masked_scatter;
+    return thisT()->getGatherScatterOpCost(
+        {IID, DataTy, Ptr, VariableMask, Alignment, I}, CostKind);
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RKSimon wrote:

https://llvm.org/docs/CodingStandards.html#do-not-use-braced-initializer-lists-to-call-a-constructor

https://github.com/llvm/llvm-project/pull/168650