[clang] [llvm] [HLSL] [DXIL] Implement the `AddUint64` HLSL function and the `UAddc` DXIL op (PR #125319)

[Farzon Lotfi via cfe-commits]

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@@ -50,6 +50,7 @@ def HandleTy : DXILOpParamType;
 def ResBindTy : DXILOpParamType;
 def ResPropsTy : DXILOpParamType;
 def SplitDoubleTy : DXILOpParamType;
+def BinaryWithCarryTy : DXILOpParamType;
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farzonl wrote:

This is reminding me how much I didn't like how splitdouble ended up. Seems like we need a more generic way to define our anonymous struct return types.

https://github.com/llvm/llvm-project/pull/125319