[clang] [libc] [llvm] [openmp] [libc] Rework the GPU build to be a regular target (PR #81921)

[Michael Jones via cfe-commits]

================
@@ -135,86 +147,20 @@ function(_get_common_test_compile_options output_var flags)
     #   list(APPEND compile_options "-Wglobal-constructors")
     # endif()
   endif()
-  if (LIBC_TARGET_ARCHITECTURE_IS_GPU)
-    # TODO: Set these flags
-    # list(APPEND compile_options "-nogpulib")
-    # list(APPEND compile_options "-fvisibility=hidden")
-    # list(APPEND compile_options "-fconvergent-functions")
-
-    # # Manually disable all standard include paths and include the resource
-    # # directory to prevent system headers from being included.
-    # list(APPEND compile_options "-isystem${COMPILER_RESOURCE_DIR}/include")
-    # list(APPEND compile_options "-nostdinc")
-  endif()
   set(${output_var} ${compile_options} PARENT_SCOPE)
 endfunction()
 
-
-# Obtains NVPTX specific arguments for compilation.
-# The PTX feature is primarily based on the CUDA toolchain version. We want to
-# be able to target NVPTX without an existing CUDA installation, so we need to
-# set this manually. This simply sets the PTX feature to the minimum required
-# for the features we wish to use on that target. The minimum PTX features used
-# here roughly corresponds to the CUDA 9.0 release.
-# Adjust as needed for desired PTX features.
-function(get_nvptx_compile_options output_var gpu_arch)
-  set(nvptx_options "")
-  list(APPEND nvptx_options "-march=${gpu_arch}")
-  list(APPEND nvptx_options "-Wno-unknown-cuda-version")
-  list(APPEND nvptx_options "SHELL:-mllvm -nvptx-emit-init-fini-kernel=false")
-  if(${gpu_arch} STREQUAL "sm_35")
-    list(APPEND nvptx_options "--cuda-feature=+ptx63")
-  elseif(${gpu_arch} STREQUAL "sm_37")
-    list(APPEND nvptx_options "--cuda-feature=+ptx63")
-  elseif(${gpu_arch} STREQUAL "sm_50")
-    list(APPEND nvptx_options "--cuda-feature=+ptx63")
-  elseif(${gpu_arch} STREQUAL "sm_52")
-    list(APPEND nvptx_options "--cuda-feature=+ptx63")
-  elseif(${gpu_arch} STREQUAL "sm_53")
-    list(APPEND nvptx_options "--cuda-feature=+ptx63")
-  elseif(${gpu_arch} STREQUAL "sm_60")
-    list(APPEND nvptx_options "--cuda-feature=+ptx63")
-  elseif(${gpu_arch} STREQUAL "sm_61")
-    list(APPEND nvptx_options "--cuda-feature=+ptx63")
-  elseif(${gpu_arch} STREQUAL "sm_62")
-    list(APPEND nvptx_options "--cuda-feature=+ptx63")
-  elseif(${gpu_arch} STREQUAL "sm_70")
-    list(APPEND nvptx_options "--cuda-feature=+ptx63")
-  elseif(${gpu_arch} STREQUAL "sm_72")
-    list(APPEND nvptx_options "--cuda-feature=+ptx63")
-  elseif(${gpu_arch} STREQUAL "sm_75")
-    list(APPEND nvptx_options "--cuda-feature=+ptx63")
-  elseif(${gpu_arch} STREQUAL "sm_80")
-    list(APPEND nvptx_options "--cuda-feature=+ptx72")
-  elseif(${gpu_arch} STREQUAL "sm_86")
-    list(APPEND nvptx_options "--cuda-feature=+ptx72")
-  elseif(${gpu_arch} STREQUAL "sm_89")
-    list(APPEND nvptx_options "--cuda-feature=+ptx72")
-  elseif(${gpu_arch} STREQUAL "sm_90")
-    list(APPEND nvptx_options "--cuda-feature=+ptx72")
-  else()
-    message(FATAL_ERROR "Unknown Nvidia GPU architecture '${gpu_arch}'")
+function(_get_hermetic_test_compile_options output_var flags)
----------------
michaelrj-google wrote:

if you have the `flags` argument you should probably call the `_get_compile_options_from_flags` function in this as well.

https://github.com/llvm/llvm-project/pull/81921