[clang] [llvm] [openmp] [OpenMP] Use generic IR for the OpenMP DeviceRTL (PR #119091)

[Michał Górny via cfe-commits]

================
@@ -288,18 +258,11 @@ function(compileDeviceRTLLibrary target_cpu target_name target_triple)
   endif()
 endfunction()
 
-# Generate a Bitcode library for all the gpu architectures the user requested.
-add_custom_target(omptarget.devicertl.nvptx)
 add_custom_target(omptarget.devicertl.amdgpu)
-foreach(gpu_arch ${LIBOMPTARGET_DEVICE_ARCHITECTURES})
-  if("${gpu_arch}" IN_LIST all_amdgpu_architectures)
-    compileDeviceRTLLibrary(${gpu_arch} amdgpu amdgcn-amd-amdhsa -Xclang -mcode-object-version=none)
-  elseif("${gpu_arch}" IN_LIST all_nvptx_architectures)
-    compileDeviceRTLLibrary(${gpu_arch} nvptx nvptx64-nvidia-cuda --cuda-feature=+ptx63)
-  else()
-    message(FATAL_ERROR "Unknown GPU architecture '${gpu_arch}'")
-  endif()
-endforeach()
+compileDeviceRTLLibrary(amdgpu amdgcn-amd-amdhsa -Xclang -mcode-object-version=none)
+
+add_custom_target(omptarget.devicertl.nvptx)
+compileDeviceRTLLibrary(nvptx nvptx64-nvidia-cuda --cuda-feature=+ptx63)
----------------
mgorny wrote:

Can we have an option to disable either of amdgpu/nvptx specifically? If anything, because it feels weird having a choice between amdgpu and nvptx plugins, but no choice between devicertl variants.

https://github.com/llvm/llvm-project/pull/119091