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llvm-project/offload/CMakeLists.txt
Callum Fare 8a2311c4bf
[Offload] Introduce offload-tblgen and initial new API implementation (#108413) 
Introduce `offload-tblgen` and an initial implementation of a subset of
the new API. The tablegen files are intended to be the single source of
truth for the new API, with the header files, documentation, and others
bits of source all automatically generated.

**TODO** (based on review feedback so far):
- [x] Check in the generated headers
- [x] Add an `offload-generate` target to trigger the generation rather
than building them every time
- [x] Decide how error handling should work
  - [x] Finish up new error handling implementation 
- [x] Decide naming convention
- [x] Add testing for the new API
- [x] Add tablegen specific testing
- [x] clang-tidy and use llvm:: types when possible
- [x] Add optional code location arguments
- [x] Avoid multiple returns from one function

### offload-tblgen

See the included
[README](d80db06491/offload/new-api/API/README.md)
for more information on how the API definition and generation works. I'm
happy to answer any questions about it and plan to walk through it in a
future LLVM Offload call.

It should be noted that struct definitions have not been fully
implemented/tested as they aren't used by the initial API definitions,
but finishing that off in the future shouldn't be too much work.

The tablegen tooling has been designed to be easily extended with new
backends, using the classes in `RecordTypes.hpp` to abstract over the
tablegen records.

### New API

Previous discussions at the LLVM/Offload meeting have brought up the
need for a new API for exposing the functionality of the plugins. This
change introduces a very small subset of a new API, which is primarily
for testing the offload tooling and demonstrating how a new API can fit
into the existing code base without being too disruptive. Exact designs
for these entry points and future additions can be worked out over time.

The new API does however introduce the bare minimum functionality to
implement device discovery for Unified Runtime and SYCL. This means that
the `urinfo` and `sycl-ls` tools can be used on top of Offload. A
(rough) implementation of a Unified Runtime adapter (aka plugin) for
Offload is available
[here](https://github.com/callumfare/unified-runtime/tree/offload_adapter).
Our intention is to maintain this and use it to implement and test
Offload API changes with SYCL.

### Demoing the new API

```sh
$ git clone -b offload_adapter https://github.com/callumfare/unified-runtime.git
$ cd unified-runtime
$ mkdir build
$ cd build
$ cmake .. -GNinja -DUR_BUILD_ADAPTER_OFFLOAD=ON \
    -DUR_OFFLOAD_INSTALL_DIR=<offload build dir containing liboffload_new.so> \
    -DUR_OFFLOAD_INCLUDE_DIR=<offload build dir containing 'offload' headers directory>
$ ninja urinfo
export LD_LIBRARY_PATH=<offload build dir containing offload plugin libraries>
$ UR_ADAPTERS_FORCE_LOAD=$PWD/lib/libur_adapter_offload.so ./bin/urinfo
[cuda:gpu][cuda:0] CUDA, NVIDIA GeForce GT 1030  [12030]
# Demo with tracing
$ OFFLOAD_TRACE=1 UR_ADAPTERS_FORCE_LOAD=$PWD/lib/libur_adapter_offload.so ./bin/urinfo
---> offloadPlatformGet(.NumEntries = 0, .phPlatforms = {}, .pNumPlatforms = 0x7ffd05e4d6e0 (2))-> OFFLOAD_RESULT_SUCCESS
---> offloadPlatformGet(.NumEntries = 2, .phPlatforms = {0x564bf4040220, 0x564bf4040240}, .pNumPlatforms = nullptr)-> OFFLOAD_RESULT_SUCCESS
...
```


### Open questions and future work
* The new API is implemented in a separate library
(`liboffload_new.so`). It could just as easily be part of the existing
`libomptarget` library - I have no strong feelings on which is better.
* Only some of the available device info is exposed, and not all the
possible device queries needed for SYCL are implemented by the plugins.
A sensible next step would be to refactor and extend the existing device
info queries in the plugins. The existing info queries are all strings,
but the new API introduces the ability to return any arbitrary type.
* It may be sensible at some point for the plugins to implement the new
API directly, and the higher level code on top of it could be made
generic, but this is more of a long-term possibility.
2024-11-25 11:34:14 -06:00

367 lines
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CMake
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# See for https://openmp.llvm.org/SupportAndFAQ.html for instructions on how
# to build offload with CMake.
cmake_minimum_required(VERSION 3.20.0)
set(LLVM_SUBPROJECT_TITLE "liboffload")
if ("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_SOURCE_DIR}")
set(OPENMP_STANDALONE_BUILD TRUE)
project(offload C CXX ASM)
else()
set(OPENMP_STANDALONE_BUILD FALSE)
endif()
# Check that the library can actually be built.
if(APPLE OR WIN32 OR WASM)
message(WARNING "libomptarget cannot be built on Windows and MacOS X!")
return()
elseif(NOT "cxx_std_17" IN_LIST CMAKE_CXX_COMPILE_FEATURES)
message(WARNING "Host compiler must support C++17 to build libomptarget!")
return()
elseif(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
message(WARNING "libomptarget on 32-bit systems is not supported!")
return()
endif()
if(OPENMP_STANDALONE_BUILD)
set(OFFLOAD_LIBDIR_SUFFIX "" CACHE STRING
"Suffix of lib installation directory, e.g. 64 => lib64")
set(OFFLOAD_INSTALL_LIBDIR "lib${OFFLOAD_LIBDIR_SUFFIX}" CACHE STRING
"Path where built offload libraries should be installed.")
else()
# When building in tree we install the runtime according to the LLVM settings.
if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
set(OFFLOAD_INSTALL_LIBDIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE} CACHE STRING
"Path where built offload libraries should be installed.")
else()
set(OFFLOAD_INSTALL_LIBDIR "lib${LLVM_LIBDIR_SUFFIX}" CACHE STRING
"Path where built offload libraries should be installed.")
endif()
endif()
set(LLVM_COMMON_CMAKE_UTILS ${CMAKE_CURRENT_SOURCE_DIR}/../cmake)
# Add path for custom modules
list(INSERT CMAKE_MODULE_PATH 0
"${CMAKE_CURRENT_SOURCE_DIR}/cmake"
"${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules"
"${LLVM_COMMON_CMAKE_UTILS}/Modules"
)
if (OPENMP_STANDALONE_BUILD)
# CMAKE_BUILD_TYPE was not set, default to Release.
if (NOT CMAKE_BUILD_TYPE)
set(CMAKE_BUILD_TYPE Release)
endif()
# Group common settings.
set(OPENMP_ENABLE_WERROR FALSE CACHE BOOL
"Enable -Werror flags to turn warnings into errors for supporting compilers.")
set(OPENMP_LIBDIR_SUFFIX "" CACHE STRING
"Suffix of lib installation directory, e.g. 64 => lib64")
# Do not use OPENMP_LIBDIR_SUFFIX directly, use OPENMP_INSTALL_LIBDIR.
set(OPENMP_INSTALL_LIBDIR "lib${OPENMP_LIBDIR_SUFFIX}")
# Group test settings.
set(OPENMP_TEST_C_COMPILER ${CMAKE_C_COMPILER} CACHE STRING
"C compiler to use for testing OpenMP runtime libraries.")
set(OPENMP_TEST_CXX_COMPILER ${CMAKE_CXX_COMPILER} CACHE STRING
"C++ compiler to use for testing OpenMP runtime libraries.")
set(OPENMP_TEST_Fortran_COMPILER ${CMAKE_Fortran_COMPILER} CACHE STRING
"FORTRAN compiler to use for testing OpenMP runtime libraries.")
set(OPENMP_LLVM_TOOLS_DIR "" CACHE PATH "Path to LLVM tools for testing.")
set(CMAKE_CXX_STANDARD 17 CACHE STRING "C++ standard to conform to")
set(CMAKE_CXX_STANDARD_REQUIRED NO)
set(CMAKE_CXX_EXTENSIONS NO)
else()
set(OPENMP_ENABLE_WERROR ${LLVM_ENABLE_WERROR})
# If building in tree, we honor the same install suffix LLVM uses.
set(OPENMP_INSTALL_LIBDIR "lib${LLVM_LIBDIR_SUFFIX}")
if (NOT MSVC)
set(OPENMP_TEST_C_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang)
set(OPENMP_TEST_CXX_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang++)
else()
set(OPENMP_TEST_C_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang.exe)
set(OPENMP_TEST_CXX_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/clang++.exe)
endif()
# Check for flang
if (NOT MSVC)
set(OPENMP_TEST_Fortran_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/flang)
else()
set(OPENMP_TEST_Fortran_COMPILER ${LLVM_RUNTIME_OUTPUT_INTDIR}/flang.exe)
endif()
# Set fortran test compiler if flang is found
if (EXISTS "${OPENMP_TEST_Fortran_COMPILER}")
message("Using local flang build at ${OPENMP_TEST_Fortran_COMPILER}")
else()
unset(OPENMP_TEST_Fortran_COMPILER)
endif()
# If not standalone, set CMAKE_CXX_STANDARD but don't set the global cache value,
# only set it locally for OpenMP.
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED NO)
set(CMAKE_CXX_EXTENSIONS NO)
endif()
# Set the path of all resulting libraries to a unified location so that it can
# be used for testing.
set(LIBOMPTARGET_LIBRARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${LIBOMPTARGET_LIBRARY_DIR})
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBOMPTARGET_LIBRARY_DIR})
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${LIBOMPTARGET_LIBRARY_DIR})
if(NOT LLVM_LIBRARY_OUTPUT_INTDIR)
set(LIBOMPTARGET_INTDIR ${LIBOMPTARGET_LIBRARY_DIR})
else()
set(LIBOMPTARGET_INTDIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
endif()
# Get dependencies for the different components of the project.
include(LibomptargetGetDependencies)
# Set up testing infrastructure.
include(OpenMPTesting)
check_cxx_compiler_flag(-Werror=global-constructors OFFLOAD_HAVE_WERROR_CTOR)
# LLVM source tree is required at build time for libomptarget
if (NOT LIBOMPTARGET_LLVM_INCLUDE_DIRS)
message(FATAL_ERROR "Missing definition for LIBOMPTARGET_LLVM_INCLUDE_DIRS")
endif()
if(DEFINED LIBOMPTARGET_BUILD_CUDA_PLUGIN OR
DEFINED LIBOMPTARGET_BUILD_AMDGPU_PLUGIN)
message(WARNING "Option removed, use 'LIBOMPTARGET_PLUGINS_TO_BUILD' instead")
endif()
set(LIBOMPTARGET_ALL_PLUGIN_TARGETS amdgpu cuda host)
set(LIBOMPTARGET_PLUGINS_TO_BUILD "all" CACHE STRING
"Semicolon-separated list of plugins to use: cuda, amdgpu, host or \"all\".")
if(LIBOMPTARGET_PLUGINS_TO_BUILD STREQUAL "all")
set(LIBOMPTARGET_PLUGINS_TO_BUILD ${LIBOMPTARGET_ALL_PLUGIN_TARGETS})
endif()
if(NOT CMAKE_SYSTEM_NAME MATCHES "Linux" AND
"host" IN_LIST LIBOMPTARGET_PLUGINS_TO_BUILD)
message(STATUS "Not building host plugin: only Linux systems are supported")
list(REMOVE_ITEM LIBOMPTARGET_PLUGINS_TO_BUILD "host")
endif()
if(NOT (CMAKE_SYSTEM_PROCESSOR MATCHES "(x86_64)|(ppc64le)|(aarch64)$"
AND CMAKE_SYSTEM_NAME MATCHES "Linux"))
if("amdgpu" IN_LIST LIBOMPTARGET_PLUGINS_TO_BUILD)
message(STATUS "Not building AMDGPU plugin: only support AMDGPU in "
"Linux x86_64, ppc64le, or aarch64 hosts")
list(REMOVE_ITEM LIBOMPTARGET_PLUGINS_TO_BUILD "amdgpu")
endif()
if("cuda" IN_LIST LIBOMPTARGET_PLUGINS_TO_BUILD)
message(STATUS "Not building CUDA plugin: only support CUDA in "
"Linux x86_64, ppc64le, or aarch64 hosts")
list(REMOVE_ITEM LIBOMPTARGET_PLUGINS_TO_BUILD "cuda")
endif()
endif()
message(STATUS "Building the offload library with support for "
"the \"${LIBOMPTARGET_PLUGINS_TO_BUILD}\" plugins")
set(LIBOMPTARGET_DLOPEN_PLUGINS "${LIBOMPTARGET_PLUGINS_TO_BUILD}" CACHE STRING
"Semicolon-separated list of plugins to use 'dlopen' for runtime linking")
set(LIBOMPTARGET_ENUM_PLUGIN_TARGETS "")
foreach(plugin IN LISTS LIBOMPTARGET_PLUGINS_TO_BUILD)
set(LIBOMPTARGET_ENUM_PLUGIN_TARGETS
"${LIBOMPTARGET_ENUM_PLUGIN_TARGETS}PLUGIN_TARGET(${plugin})\n")
endforeach()
string(STRIP ${LIBOMPTARGET_ENUM_PLUGIN_TARGETS} LIBOMPTARGET_ENUM_PLUGIN_TARGETS)
configure_file(
${CMAKE_CURRENT_SOURCE_DIR}/include/Shared/Targets.def.in
${CMAKE_CURRENT_BINARY_DIR}/include/Shared/Targets.def
)
include_directories(${LIBOMPTARGET_LLVM_INCLUDE_DIRS})
# This is a list of all the targets that are supported/tested right now.
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} aarch64-unknown-linux-gnu")
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} aarch64-unknown-linux-gnu-LTO")
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} amdgcn-amd-amdhsa")
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} powerpc64le-ibm-linux-gnu")
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} powerpc64le-ibm-linux-gnu-LTO")
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} powerpc64-ibm-linux-gnu")
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} powerpc64-ibm-linux-gnu-LTO")
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} x86_64-unknown-linux-gnu")
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} x86_64-unknown-linux-gnu-LTO")
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} nvptx64-nvidia-cuda")
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} nvptx64-nvidia-cuda-LTO")
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} nvptx64-nvidia-cuda-JIT-LTO")
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} s390x-ibm-linux-gnu")
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} s390x-ibm-linux-gnu-LTO")
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} riscv64-unknown-linux-gnu")
set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} riscv64-unknown-linux-gnu-LTO")
# Once the plugins for the different targets are validated, they will be added to
# the list of supported targets in the current system.
set (LIBOMPTARGET_SYSTEM_TARGETS "")
set (LIBOMPTARGET_TESTED_PLUGINS "")
# Check whether using debug mode. In debug mode, allow dumping progress
# messages at runtime by default. Otherwise, it can be enabled
# independently using the LIBOMPTARGET_ENABLE_DEBUG option.
string( TOLOWER "${CMAKE_BUILD_TYPE}" LIBOMPTARGET_CMAKE_BUILD_TYPE)
if(LIBOMPTARGET_CMAKE_BUILD_TYPE MATCHES debug)
option(LIBOMPTARGET_ENABLE_DEBUG "Allow debug output with the environment variable LIBOMPTARGET_DEBUG=1" ON)
else()
option(LIBOMPTARGET_ENABLE_DEBUG "Allow debug output with the environment variable LIBOMPTARGET_DEBUG=1" OFF)
endif()
if(LIBOMPTARGET_ENABLE_DEBUG)
add_definitions(-DOMPTARGET_DEBUG)
endif()
# No exceptions and no RTTI, except if requested.
set(offload_compile_flags -fno-exceptions)
if(NOT LLVM_ENABLE_RTTI)
set(offload_compile_flags ${offload_compile_flags} -fno-rtti)
endif()
if(OFFLOAD_HAVE_WERROR_CTOR)
list(APPEND offload_compile_flags -Werror=global-constructors)
endif()
# TODO: Consider enabling LTO by default if supported.
# https://cmake.org/cmake/help/latest/module/CheckIPOSupported.html can be used
# to test for working LTO. However, before CMake 3.24 this will test the
# default linker and ignore options such as LLVM_ENABLE_LLD. As a result, CMake
# would test whether LTO works with the default linker but build with another one.
# In a typical scenario, libomptarget is compiled with the in-tree Clang, but
# linked with ld.gold, which requires the LLVMgold plugin, when it actually
# would work with the lld linker (or also fail because the system lld is too old
# to understand opaque pointers). Using gcc as the compiler would pass the test, but fail
# when linking with lld since does not understand gcc's LTO format.
set(LIBOMPTARGET_USE_LTO FALSE CACHE BOOL "Use LTO for the offload runtimes if available")
if (LIBOMPTARGET_USE_LTO)
# CMake sets CMAKE_CXX_COMPILE_OPTIONS_IPO depending on the compiler and is
# also what CheckIPOSupported uses to test support.
list(APPEND offload_compile_flags ${CMAKE_CXX_COMPILE_OPTIONS_IPO})
list(APPEND offload_link_flags ${CMAKE_CXX_COMPILE_OPTIONS_IPO})
endif()
if(OPENMP_STANDALONE_BUILD)
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
execute_process(
OUTPUT_STRIP_TRAILING_WHITESPACE
COMMAND ${CMAKE_CXX_COMPILER} --print-resource-dir
RESULT_VARIABLE COMMAND_RETURN_CODE
OUTPUT_VARIABLE COMPILER_RESOURCE_DIR
)
endif()
set(LIBOMP_HAVE_OMPT_SUPPORT FALSE)
set(LIBOMP_OMPT_SUPPORT FALSE)
find_path (
LIBOMP_OMP_TOOLS_INCLUDE_DIR
NAMES
omp-tools.h
HINTS
${COMPILER_RESOURCE_DIR}/include
${CMAKE_INSTALL_PREFIX}/include
)
if(LIBOMP_OMP_TOOLS_INCLUDE_DIR)
set(LIBOMP_HAVE_OMPT_SUPPORT TRUE)
set(LIBOMP_OMPT_SUPPORT TRUE)
endif()
# LLVM_LIBRARY_DIRS set by find_package(LLVM) in LibomptargetGetDependencies
find_library (
LIBOMP_STANDALONE
NAMES
omp
HINTS
${CMAKE_INSTALL_PREFIX}/lib
${LLVM_LIBRARY_DIRS}
REQUIRED
)
endif()
macro(pythonize_bool var)
if (${var})
set(${var} True)
else()
set(${var} False)
endif()
endmacro()
if(OPENMP_STANDALONE_BUILD OR TARGET omp)
# Check LIBOMP_HAVE_VERSION_SCRIPT_FLAG
include(LLVMCheckCompilerLinkerFlag)
if(NOT APPLE)
llvm_check_compiler_linker_flag(C "-Wl,--version-script=${CMAKE_CURRENT_LIST_DIR}/../openmp/runtime/src/exports_test_so.txt" LIBOMP_HAVE_VERSION_SCRIPT_FLAG)
endif()
endif()
# OMPT support for libomptarget
# Follow host OMPT support and check if host support has been requested.
# LIBOMP_HAVE_OMPT_SUPPORT indicates whether host OMPT support has been implemented.
# LIBOMP_OMPT_SUPPORT indicates whether host OMPT support has been requested (default is ON).
# LIBOMPTARGET_OMPT_SUPPORT indicates whether target OMPT support has been requested (default is ON).
set(OMPT_TARGET_DEFAULT FALSE)
if ((LIBOMP_HAVE_OMPT_SUPPORT) AND (LIBOMP_OMPT_SUPPORT) AND (NOT WIN32))
set (OMPT_TARGET_DEFAULT TRUE)
endif()
set(LIBOMPTARGET_OMPT_SUPPORT ${OMPT_TARGET_DEFAULT} CACHE BOOL "OMPT-target-support?")
if ((OMPT_TARGET_DEFAULT) AND (LIBOMPTARGET_OMPT_SUPPORT))
add_definitions(-DOMPT_SUPPORT=1)
message(STATUS "OMPT target enabled")
else()
set(LIBOMPTARGET_OMPT_SUPPORT FALSE)
message(STATUS "OMPT target disabled")
endif()
pythonize_bool(LIBOMPTARGET_OMPT_SUPPORT)
if(${LLVM_LIBC_GPU_BUILD})
set(LIBOMPTARGET_HAS_LIBC TRUE)
else()
set(LIBOMPTARGET_HAS_LIBC FALSE)
endif()
set(LIBOMPTARGET_GPU_LIBC_SUPPORT ${LIBOMPTARGET_HAS_LIBC} CACHE BOOL
"Libomptarget support for the GPU libc")
pythonize_bool(LIBOMPTARGET_GPU_LIBC_SUPPORT)
set(LIBOMPTARGET_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/include)
set(LIBOMPTARGET_BINARY_INCLUDE_DIR ${CMAKE_CURRENT_BINARY_DIR}/include)
message(STATUS "OpenMP tools dir in libomptarget: ${LIBOMP_OMP_TOOLS_INCLUDE_DIR}")
if(LIBOMP_OMP_TOOLS_INCLUDE_DIR)
include_directories(${LIBOMP_OMP_TOOLS_INCLUDE_DIR})
endif()
set(LIBOMPTARGET_LLVM_LIBRARY_DIR "${LLVM_LIBRARY_DIR}" CACHE STRING
"Path to folder containing llvm library libomptarget.so")
set(LIBOMPTARGET_LLVM_LIBRARY_INTDIR "${LIBOMPTARGET_INTDIR}" CACHE STRING
"Path to folder where intermediate libraries will be output")
# Build offloading plugins and device RTLs if they are available.
add_subdirectory(plugins-nextgen)
add_subdirectory(DeviceRTL)
add_subdirectory(tools)
# Build target agnostic offloading library.
add_subdirectory(src)
add_subdirectory(tools/offload-tblgen)
add_subdirectory(liboffload)
# Add tests.
add_subdirectory(test)
# Add unit tests if GMock/GTest is present
if (EXISTS ${LLVM_THIRD_PARTY_DIR}/unittest)
if (NOT TARGET llvm_gtest)
add_subdirectory(${LLVM_THIRD_PARTY_DIR}/unittest ${CMAKE_CURRENT_BINARY_DIR}/third-party/unittest)
endif()
add_subdirectory(unittests)
endif()
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