[PATCH] D45387: [CUDA] Revert defining __CUDA_ARCH__ for amdgcn targets

[Yaxun Liu via Phabricator via cfe-commits]

yaxunl created this revision.
yaxunl added a reviewer: tra.
Herald added subscribers: nhaehnle, jholewinski.

amdgcn targets only support HIP, which does not define `__CUDA_ARCH__`.

`__HIP_DEVICE_COMPILE__` depends on HIP language mode, therefore it needs to be added
in a different patch.

refer to discussions in https://reviews.llvm.org/D45277


https://reviews.llvm.org/D45387

Files:
  lib/Basic/Targets.cpp
  lib/Basic/Targets.h
  lib/Basic/Targets/AMDGPU.cpp
  lib/Basic/Targets/AMDGPU.h
  lib/Basic/Targets/NVPTX.cpp

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