[offload] Standalone build fixes (llvm#118173)

A fair number of fixes to get standalone builds of offload working —
mostly copying missing bits from openmp. It's almost ready — I still
need to figure out why some of the tsts aren't linking to the right
libraries.

Author: mgorny

offload/CMakeLists.txt

@@ -64,6 +64,9 @@ if (OPENMP_STANDALONE_BUILD)
   # Do not use OPENMP_LIBDIR_SUFFIX directly, use OPENMP_INSTALL_LIBDIR.
   set(OPENMP_INSTALL_LIBDIR "lib${OPENMP_LIBDIR_SUFFIX}")
 
+  # Used by llvm_add_tool() and tests.
+  set(LLVM_RUNTIME_OUTPUT_INTDIR ${CMAKE_CURRENT_BINARY_DIR})
+
   # Group test settings.
   set(OPENMP_TEST_C_COMPILER ${CMAKE_C_COMPILER} CACHE STRING
     "C compiler to use for testing OpenMP runtime libraries.")
@@ -129,6 +132,7 @@ include(LibomptargetGetDependencies)
 # Set up testing infrastructure.
 include(OpenMPTesting)
 
+include(CheckCXXCompilerFlag)
 check_cxx_compiler_flag(-Werror=global-constructors OFFLOAD_HAVE_WERROR_CTOR)
 
 # LLVM source tree is required at build time for libomptarget
@@ -286,6 +290,26 @@ if(OPENMP_STANDALONE_BUILD)
       ${LLVM_LIBRARY_DIRS}
     REQUIRED
   )
+
+  find_path (
+    LIBOMP_INCLUDE_DIR
+    NAMES
+      omp.h
+    HINTS
+    ${COMPILER_RESOURCE_DIR}/include
+    ${CMAKE_INSTALL_PREFIX}/include
+  )
+
+  get_filename_component(LIBOMP_LIBRARY_DIR ${LIBOMP_STANDALONE} DIRECTORY)
+
+  set(OPENMP_TEST_FLAGS "" CACHE STRING
+    "Extra compiler flags to send to the test compiler.")
+  set(OPENMP_TEST_OPENMP_FLAGS ${OPENMP_TEST_COMPILER_OPENMP_FLAGS} CACHE STRING
+    "OpenMP compiler flag to use for testing OpenMP runtime libraries.")
+  set(LIBOMPTARGET_OPENMP_HEADER_FOLDER "${LIBOMP_INCLUDE_DIR}" CACHE STRING
+    "Path to folder containing omp.h")
+  set(LIBOMPTARGET_OPENMP_HOST_RTL_FOLDER "${LIBOMP_LIBRARY_DIR}" CACHE STRING
+    "Path to folder containing libomp.so, and libLLVMSupport.so with profiling enabled")
 endif()
 
 macro(pythonize_bool var)

offload/cmake/OpenMPTesting.cmake

@@ -37,17 +37,6 @@ function(find_standalone_test_dependencies)
     return()
   endif()
 
-  find_program(OFFLOAD_DEVICE_INFO_EXECUTABLE
-    NAMES llvm-offload-device-info
-    PATHS ${OPENMP_LLVM_TOOLS_DIR})
-  if (NOT OFFLOAD_DEVICE_INFO_EXECUTABLE)
-    message(STATUS "Cannot find 'llvm-offload-device-info'.")
-    message(STATUS "Please put 'not' in your PATH, set OFFLOAD_DEVICE_INFO_EXECUTABLE to its full path, or point OPENMP_LLVM_TOOLS_DIR to its directory.")
-    message(WARNING "The check targets will not be available!")
-    set(ENABLE_CHECK_TARGETS FALSE PARENT_SCOPE)
-    return()
-  endif()
-
   find_program(OPENMP_NOT_EXECUTABLE
     NAMES not
     PATHS ${OPENMP_LLVM_TOOLS_DIR})
@@ -82,8 +71,8 @@ else()
     set(OPENMP_FILECHECK_EXECUTABLE ${LLVM_RUNTIME_OUTPUT_INTDIR}/FileCheck)
   endif()
   set(OPENMP_NOT_EXECUTABLE ${LLVM_RUNTIME_OUTPUT_INTDIR}/not)
-  set(OFFLOAD_DEVICE_INFO_EXECUTABLE ${LLVM_RUNTIME_OUTPUT_INTDIR}/llvm-offload-device-info)
 endif()
+set(OFFLOAD_DEVICE_INFO_EXECUTABLE ${LLVM_RUNTIME_OUTPUT_INTDIR}/llvm-offload-device-info)
 
 # Macro to extract information about compiler from file. (no own scope)
 macro(extract_test_compiler_information lang file)
@@ -136,7 +125,7 @@ if (${OPENMP_STANDALONE_BUILD})
   # project is built which is too late for detecting the compiler...
   file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/DetectTestCompiler)
   execute_process(
-    COMMAND ${CMAKE_COMMAND} -G${CMAKE_GENERATOR} ${CMAKE_CURRENT_LIST_DIR}/DetectTestCompiler
+    COMMAND ${CMAKE_COMMAND} -G${CMAKE_GENERATOR} ${CMAKE_CURRENT_SOURCE_DIR}/../openmp/cmake/DetectTestCompiler
       -DCMAKE_C_COMPILER=${OPENMP_TEST_C_COMPILER}
       -DCMAKE_CXX_COMPILER=${OPENMP_TEST_CXX_COMPILER}
     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/DetectTestCompiler

offload/plugins-nextgen/CMakeLists.txt

@@ -12,6 +12,7 @@ function(add_target_library target_name lib_name)
       CodeGen
       Core
       Extensions
+      FrontendOffloading
       InstCombine
       Instrumentation
       IPO
@@ -20,6 +21,7 @@ function(add_target_library target_name lib_name)
       MC
       Object
       Passes
+      ProfileData
       Remarks
       ScalarOpts
       Support

offload/plugins-nextgen/amdgpu/CMakeLists.txt

@@ -10,12 +10,11 @@ target_include_directories(omptarget.rtl.amdgpu PRIVATE
 
 if(hsa-runtime64_FOUND AND NOT "amdgpu" IN_LIST LIBOMPTARGET_DLOPEN_PLUGINS)
   message(STATUS "Building AMDGPU plugin linked against libhsa")
-  target_link_libraries(omptarget.rtl.amdgpu PRIVATE hsa-runtime64::hsa-runtime64 LLVMFrontendOffloading)
+  target_link_libraries(omptarget.rtl.amdgpu PRIVATE hsa-runtime64::hsa-runtime64)
 else()
   message(STATUS "Building AMDGPU plugin for dlopened libhsa")
   target_include_directories(omptarget.rtl.amdgpu PRIVATE dynamic_hsa)
   target_sources(omptarget.rtl.amdgpu PRIVATE dynamic_hsa/hsa.cpp)
-  target_link_libraries(omptarget.rtl.amdgpu PRIVATE LLVMFrontendOffloading)
 endif()
 
 # Configure testing for the AMDGPU plugin. We will build tests if we could a

offload/plugins-nextgen/common/CMakeLists.txt

@@ -7,7 +7,7 @@ add_library(PluginCommon OBJECT
   src/RPC.cpp
   src/Utils/ELF.cpp
 )
-add_dependencies(PluginCommon intrinsics_gen LLVMProfileData)
+add_dependencies(PluginCommon intrinsics_gen)
 
 # Only enable JIT for those targets that LLVM can support.
 set(supported_jit_targets AMDGPU NVPTX)
@@ -44,7 +44,6 @@ target_compile_definitions(PluginCommon PRIVATE
 
 target_compile_options(PluginCommon PUBLIC ${offload_compile_flags})
 target_link_options(PluginCommon PUBLIC ${offload_link_flags})
-target_link_libraries(PluginCommon PRIVATE LLVMProfileData)
 
 target_include_directories(PluginCommon PUBLIC
   ${CMAKE_CURRENT_SOURCE_DIR}/include

offload/test/CMakeLists.txt

@@ -28,14 +28,19 @@ if(CUDAToolkit_FOUND)
   get_filename_component(CUDA_LIBDIR "${CUDA_cudart_static_LIBRARY}" DIRECTORY)
 endif()
 
+set(OMP_DEPEND)
+if(TARGET omp)
+  set(OMP_DEPEND omp)
+endif()
+
 string(REGEX MATCHALL "([^\ ]+\ |[^\ ]+$)" SYSTEM_TARGETS "${LIBOMPTARGET_SYSTEM_TARGETS}")
 foreach(CURRENT_TARGET IN LISTS SYSTEM_TARGETS)
   string(STRIP "${CURRENT_TARGET}" CURRENT_TARGET)
 
   add_offload_testsuite(check-libomptarget-${CURRENT_TARGET}
     "Running libomptarget tests"
     ${CMAKE_CURRENT_BINARY_DIR}/${CURRENT_TARGET}
-    DEPENDS omptarget omp ${LIBOMPTARGET_TESTED_PLUGINS}
+    DEPENDS omptarget ${OMP_DEPEND} ${LIBOMPTARGET_TESTED_PLUGINS}
     ARGS ${LIBOMPTARGET_LIT_ARG_LIST})
   list(APPEND LIBOMPTARGET_LIT_TESTSUITES ${CMAKE_CURRENT_BINARY_DIR}/${CURRENT_TARGET})
 
@@ -49,12 +54,12 @@ add_offload_testsuite(check-libomptarget
   "Running libomptarget tests"
   ${LIBOMPTARGET_LIT_TESTSUITES}
   EXCLUDE_FROM_CHECK_ALL
-  DEPENDS omptarget omp ${LIBOMPTARGET_TESTED_PLUGINS}
+  DEPENDS llvm-offload-device-info omptarget ${OMP_DEPEND} ${LIBOMPTARGET_TESTED_PLUGINS}
   ARGS ${LIBOMPTARGET_LIT_ARG_LIST})
 
 add_offload_testsuite(check-offload
   "Running libomptarget tests"
   ${LIBOMPTARGET_LIT_TESTSUITES}
   EXCLUDE_FROM_CHECK_ALL
-  DEPENDS omptarget omp ${LIBOMPTARGET_TESTED_PLUGINS}
+  DEPENDS llvm-offload-device-info omptarget ${OMP_DEPEND} ${LIBOMPTARGET_TESTED_PLUGINS}
   ARGS ${LIBOMPTARGET_LIT_ARG_LIST})