[openmp] Add option to disable tsan tests (#111548)

This adds a OPENMP_TEST_ENABLE_TSAN option that allows to override
whether tests using tsan will be enabled. The option defaults to the
existing auto-detection.

The background here is
https://github.com/llvm/llvm-project/issues/111492, where we have some
systems where tsan doesn't work, but we do still want to build it and
run tests that don't use tsan.

openmp/cmake/OpenMPTesting.cmake

@@ -163,6 +163,9 @@ else()
   set(OPENMP_TEST_COMPILER_HAS_OMIT_FRAME_POINTER_FLAGS 1)
 endif()
 
+set(OPENMP_TEST_ENABLE_TSAN "${OPENMP_TEST_COMPILER_HAS_TSAN_FLAGS}" CACHE BOOL
+    "Whether to enable tests using tsan")
+
 # Function to set compiler features for use in lit.
 function(update_test_compiler_features)
   set(FEATURES "[")

openmp/tools/archer/tests/CMakeLists.txt

@@ -28,7 +28,7 @@ macro(pythonize_bool var)
 endmacro()
 
 pythonize_bool(LIBARCHER_HAVE_LIBATOMIC)
-pythonize_bool(OPENMP_TEST_COMPILER_HAS_TSAN_FLAGS)
+pythonize_bool(OPENMP_TEST_ENABLE_TSAN)
 
 set(ARCHER_TSAN_TEST_DEPENDENCE "")
 if(TARGET tsan)

openmp/tools/archer/tests/lit.site.cfg.in

@@ -12,7 +12,7 @@ config.omp_library_dir = "@LIBOMP_LIBRARY_DIR@"
 config.omp_header_dir = "@LIBOMP_INCLUDE_DIR@"
 config.operating_system = "@CMAKE_SYSTEM_NAME@"
 config.has_libatomic = @LIBARCHER_HAVE_LIBATOMIC@
-config.has_tsan = @OPENMP_TEST_COMPILER_HAS_TSAN_FLAGS@
+config.has_tsan = @OPENMP_TEST_ENABLE_TSAN@
 
 config.test_archer_flags = "@LIBARCHER_TEST_FLAGS@"
 config.libarcher_obj_root = "@CMAKE_CURRENT_BINARY_DIR@"