[libclc] [libclc] Update default triple support for AMD and deprecate 32-bit PTX (PR #174415)

[Wenju He via cfe-commits]

wenju-he wrote:

> Done, somewhat related, why is this a restriction on NVPTX? We should have access to the same block / thread indexing that AMDGCN has.

the comment might be outdated.

> I need to figure out how to get SPIRV working with my `gpuintrin.h` interface so I can replace all of those functions with that header. Would you be opposed to that? if I recall the main blocker was the lack of a subgroup ballot intrinsic for SPIR-V.

no objection from me. Do you mean using gpuintrin.h in libclc implementation?


https://github.com/llvm/llvm-project/pull/174415