jhuber6 wrote:

> So we just don't want any mesa specific triple, because we really just want 
> this to be treated as "application wants to compile OpenCL C" and any target 
> specific information we want to deal with in our runtime, not at compile time.



> Not really, but what we do is to parse SPIR-V and for builtins we want to use 
> the libclc implementations (not all and it might depend on the hardware) we 
> call into the parsed libclc SPIR-V functions instead.
> 
> So we really just use it as a SPIR-V library and "link" to it at runtime 
> selectively thought instead of actually linking function calls, we just link 
> SPIR-V opcodes and the functions provided by the libclc SPIR-V binary.

I think this is orthogonal to the PR, it just changes an internal build. Though 
I could see that argument that it should default to `spirv64-unknown-unknown` 
instead.

Personally, I think it would make sense to keep this as `mesa3d` just to imply 
the graphics toolchain use. With my GPU compute hat on, this would just be 
`clang --target=spirv64-mesa-mesa3d foo.cl` which implicitly links `-lclc` via 
`-L /lib/spirv64-mesa-mesa3d`. Keeping denormals and others consistent is more 
of a build problem and not explicitly related to the triple.

https://github.com/llvm/llvm-project/pull/199618
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