[compiler-rt] Split the GPU.cmake cache file to AMDGPU and NVPTX (#190349)

Summary:
These will have different functionality going forward. They should be
split so we can more easily support things only feasible in AMDGPU.

compiler-rt/cmake/caches/AMDGPU.cmake

diff --git a/compiler-rt/cmake/caches/GPU.cmake b/compiler-rt/cmake/caches/AMDGPU.cmake
similarity index 84%
copy from compiler-rt/cmake/caches/GPU.cmake
copy to compiler-rt/cmake/caches/AMDGPU.cmake
index 39f2674..7286ec6 100644
--- a/compiler-rt/cmake/caches/GPU.cmake
+++ b/compiler-rt/cmake/caches/AMDGPU.cmake
@@ -1,6 +1,4 @@
-# This file sets up a CMakeCache for GPU builds of compiler-rt. This supports
-# amdgcn and nvptx builds targeting the builtins and profile libraries.
-
+# This file sets up a CMakeCache for AMD GPU builds of compiler-rt.
 set(COMPILER_RT_INCLUDE_TESTS ON CACHE BOOL "")
 set(COMPILER_RT_HAS_SAFESTACK OFF CACHE BOOL "")
 set(COMPILER_RT_DEFAULT_TARGET_ONLY ON CACHE BOOL "")

compiler-rt/cmake/caches/NVPTX.cmake

diff --git a/compiler-rt/cmake/caches/GPU.cmake b/compiler-rt/cmake/caches/NVPTX.cmake
similarity index 84%
rename from compiler-rt/cmake/caches/GPU.cmake
rename to compiler-rt/cmake/caches/NVPTX.cmake
index 39f2674..ac5f3a6 100644
--- a/compiler-rt/cmake/caches/GPU.cmake
+++ b/compiler-rt/cmake/caches/NVPTX.cmake
@@ -1,6 +1,4 @@
-# This file sets up a CMakeCache for GPU builds of compiler-rt. This supports
-# amdgcn and nvptx builds targeting the builtins and profile libraries.
-
+# This file sets up a CMakeCache for NVPTX builds of compiler-rt.
 set(COMPILER_RT_INCLUDE_TESTS ON CACHE BOOL "")
 set(COMPILER_RT_HAS_SAFESTACK OFF CACHE BOOL "")
 set(COMPILER_RT_DEFAULT_TARGET_ONLY ON CACHE BOOL "")

offload/cmake/caches/AMDGPULibcBot.cmake

diff --git a/offload/cmake/caches/AMDGPULibcBot.cmake b/offload/cmake/caches/AMDGPULibcBot.cmake
index ffd4f7c..2dfff5d 100644
--- a/offload/cmake/caches/AMDGPULibcBot.cmake
+++ b/offload/cmake/caches/AMDGPULibcBot.cmake
@@ -17,6 +17,6 @@
 set(CLANG_DEFAULT_RTLIB "compiler-rt" STRING "")
 
 set(LLVM_RUNTIME_TARGETS default;amdgcn-amd-amdhsa CACHE STRING "")
-set(RUNTIMES_amdgcn-amd-amdhsa_CACHE_FILES "${CMAKE_SOURCE_DIR}/../compiler-rt/cmake/caches/GPU.cmake;${CMAKE_SOURCE_DIR}/../libcxx/cmake/caches/AMDGPU.cmake" CACHE STRING "")
+set(RUNTIMES_amdgcn-amd-amdhsa_CACHE_FILES "${CMAKE_SOURCE_DIR}/../compiler-rt/cmake/caches/AMDGPU.cmake;${CMAKE_SOURCE_DIR}/../libcxx/cmake/caches/AMDGPU.cmake" CACHE STRING "")
 set(RUNTIMES_amdgcn-amd-amdhsa_LLVM_ENABLE_RUNTIMES "compiler-rt;openmp;libc;libcxxabi;libcxx" CACHE STRING "")
 set(RUNTIMES_amdgcn-amd-amdhsa_LIBC_GPU_TEST_JOBS 4 CACHE STRING "")

offload/cmake/caches/FlangOffload.cmake

diff --git a/offload/cmake/caches/FlangOffload.cmake b/offload/cmake/caches/FlangOffload.cmake
index d8e1c92..a439e69 100644
--- a/offload/cmake/caches/FlangOffload.cmake
+++ b/offload/cmake/caches/FlangOffload.cmake
@@ -3,8 +3,8 @@
 set(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR ON CACHE BOOL "")
 
 set(LLVM_RUNTIME_TARGETS default;amdgcn-amd-amdhsa;nvptx64-nvidia-cuda CACHE STRING "") 
-set(RUNTIMES_nvptx64-nvidia-cuda_CACHE_FILES "${CMAKE_SOURCE_DIR}/../compiler-rt/cmake/caches/GPU.cmake;${CMAKE_SOURCE_DIR}/../libcxx/cmake/caches/NVPTX.cmake" CACHE STRING "")
-set(RUNTIMES_amdgcn-amd-amdhsa_CACHE_FILES "${CMAKE_SOURCE_DIR}/../compiler-rt/cmake/caches/GPU.cmake;${CMAKE_SOURCE_DIR}/../libcxx/cmake/caches/AMDGPU.cmake" CACHE STRING "")
+set(RUNTIMES_nvptx64-nvidia-cuda_CACHE_FILES "${CMAKE_SOURCE_DIR}/../compiler-rt/cmake/caches/NVPTX.cmake;${CMAKE_SOURCE_DIR}/../libcxx/cmake/caches/NVPTX.cmake" CACHE STRING "")
+set(RUNTIMES_amdgcn-amd-amdhsa_CACHE_FILES "${CMAKE_SOURCE_DIR}/../compiler-rt/cmake/caches/AMDGPU.cmake;${CMAKE_SOURCE_DIR}/../libcxx/cmake/caches/AMDGPU.cmake" CACHE STRING "")
 set(RUNTIMES_nvptx64-nvidia-cuda_LLVM_ENABLE_RUNTIMES "compiler-rt;libc;openmp;libcxx;libcxxabi;flang-rt" CACHE STRING "")
 set(RUNTIMES_amdgcn-amd-amdhsa_LLVM_ENABLE_RUNTIMES "compiler-rt;libc;openmp;libcxx;libcxxabi;flang-rt" CACHE STRING "")
 set(RUNTIMES_nvptx64-nvidia-cuda_FLANG_RT_LIBC_PROVIDER llvm CACHE STRING "")

offload/cmake/caches/Offload.cmake

diff --git a/offload/cmake/caches/Offload.cmake b/offload/cmake/caches/Offload.cmake
index 14cc63a..8fcd2bc 100644
--- a/offload/cmake/caches/Offload.cmake
+++ b/offload/cmake/caches/Offload.cmake
@@ -3,7 +3,7 @@
 set(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR ON CACHE BOOL "")
 
 set(LLVM_RUNTIME_TARGETS default;amdgcn-amd-amdhsa;nvptx64-nvidia-cuda CACHE STRING "") 
-set(RUNTIMES_nvptx64-nvidia-cuda_CACHE_FILES "${CMAKE_SOURCE_DIR}/../compiler-rt/cmake/caches/GPU.cmake;${CMAKE_SOURCE_DIR}/../libcxx/cmake/caches/NVPTX.cmake" CACHE STRING "")
-set(RUNTIMES_amdgcn-amd-amdhsa_CACHE_FILES "${CMAKE_SOURCE_DIR}/../compiler-rt/cmake/caches/GPU.cmake;${CMAKE_SOURCE_DIR}/../libcxx/cmake/caches/AMDGPU.cmake" CACHE STRING "")
+set(RUNTIMES_nvptx64-nvidia-cuda_CACHE_FILES "${CMAKE_SOURCE_DIR}/../compiler-rt/cmake/caches/NVPTX.cmake;${CMAKE_SOURCE_DIR}/../libcxx/cmake/caches/NVPTX.cmake" CACHE STRING "")
+set(RUNTIMES_amdgcn-amd-amdhsa_CACHE_FILES "${CMAKE_SOURCE_DIR}/../compiler-rt/cmake/caches/AMDGPU.cmake;${CMAKE_SOURCE_DIR}/../libcxx/cmake/caches/AMDGPU.cmake" CACHE STRING "")
 set(RUNTIMES_nvptx64-nvidia-cuda_LLVM_ENABLE_RUNTIMES "compiler-rt;libc;openmp;libcxx;libcxxabi" CACHE STRING "")
 set(RUNTIMES_amdgcn-amd-amdhsa_LLVM_ENABLE_RUNTIMES "compiler-rt;libc;openmp;libcxx;libcxxabi" CACHE STRING "")