[clang] [llvm] [HLSL] Handle WaveActiveBallot struct return type appropriately (PR #175105)

[Finn Plummer via cfe-commits]

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@@ -58,6 +58,7 @@ def ResPropsTy : DXILOpParamType;
 def SplitDoubleTy : DXILOpParamType;
 def BinaryWithCarryTy : DXILOpParamType;
 def DimensionsTy : DXILOpParamType;
+def Fouri32s : DXILOpParamType;
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inbelic wrote:

nit: Is this naming from somewhere? It seems the other custom types are defined by the operation that defines them. So `WaveBallotTy` is maybe more applicable. 

https://github.com/llvm/llvm-project/pull/175105