farzonl wrote:

> Random question, why are the intrinsics called `spv.wave` when the spec seems 
> to use `subgroup`? I wasn't sure if I should keep that convention or change 
> it in #174862

> More importantly the intrinsic toggling we are doing is very basic between 
> DirectX and SPIRV so the intrinsic names need to match.

It mostly became this way because when we started spirv in the frontend wasn't 
a thing yet.

It doesn't have to stay this way in `clang/lib/CodeGen/CGHLSLRuntime.h` there 
is a macro `GENERATE_HLSL_INTRINSIC_FUNCTION` we could make a 
`GENERATE_HLSL_INTRINSIC_FUNCTION_DEFAULT` that uses the same 
`IntrinsicPostfix` name for both spirv and directx but then for these cases 
where we want some intrinsics to be subgroup vs wave we have 
`GENERATE_HLSL_INTRINSIC_FUNCTION` a spvPostfix adn dxpostfix name.

https://github.com/llvm/llvm-project/pull/174655
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