3b4e79398d
This patch introduces support for Integrated Distributed ThinLTO (DTLTO) in ELF LLD. DTLTO enables the distribution of ThinLTO backend compilations via external distribution systems, such as Incredibuild, during the traditional link step: https://llvm.org/docs/DTLTO.html. It is expected that users will invoke DTLTO through the compiler driver (e.g., Clang) rather than calling LLD directly. A Clang-side interface for DTLTO will be added in a follow-up patch. Note: Bitcode members of archives (thin or non-thin) are not currently supported. This will be addressed in a future change. As a consequence of this lack of support, this patch is not sufficient to allow for self-hosting an LLVM build with DTLTO. Theoretically, --start-lib/--end-lib could be used instead of archives in a self-host build. However, it's unclear how --start-lib/--end-lib can be easily used with the LLVM build system. Testing: - ELF LLD `lit` test coverage has been added, using a mock distributor to avoid requiring Clang. - Cross-project `lit` tests cover integration with Clang. For the design discussion of the DTLTO feature, see: #126654.
108 lines
3.2 KiB
CMake
108 lines
3.2 KiB
CMake
# Cross project tests, for tests that require access to multiple projects across
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# LLVM (e.g. clang, lld and lldb).
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# The subset inside debuginfo-tests invoke clang to generate programs with
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# various types of debug info, and then run those programs under a debugger
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# such as GDB or LLDB to verify the results.
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set(LLVM_SUBPROJECT_TITLE "Cross-Project")
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find_package(Python3 COMPONENTS Interpreter)
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add_llvm_executable(check-gdb-llvm-support
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debuginfo-tests/llvm-prettyprinters/gdb/llvm-support.cpp
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)
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target_link_libraries(check-gdb-llvm-support PRIVATE LLVMSupport)
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set(CROSS_PROJECT_TESTS_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
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set(CROSS_PROJECT_TESTS_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
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set(CROSS_PROJECT_TEST_DEPS
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FileCheck
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check-gdb-llvm-support
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count
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llvm-dwarfdump
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llvm-config
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llvm-objdump
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split-file
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not
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)
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if ("clang" IN_LIST LLVM_ENABLE_PROJECTS)
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list(APPEND CROSS_PROJECT_TEST_DEPS clang)
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endif()
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if ("mlir" IN_LIST LLVM_ENABLE_PROJECTS)
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add_llvm_executable(check-gdb-mlir-support
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debuginfo-tests/llvm-prettyprinters/gdb/mlir-support.cpp
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)
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target_include_directories(check-gdb-mlir-support PRIVATE
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${LLVM_EXTERNAL_MLIR_SOURCE_DIR}/include
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${LLVM_BINARY_DIR}/tools/mlir/include)
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target_link_libraries(check-gdb-mlir-support PRIVATE MLIRIR)
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list(APPEND CROSS_PROJECT_TEST_DEPS check-gdb-mlir-support)
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set(MLIR_SOURCE_DIR ${LLVM_EXTERNAL_MLIR_SOURCE_DIR})
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endif()
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if("compiler-rt" IN_LIST LLVM_ENABLE_PROJECTS)
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# llgdb-tests/asan.c and other asan* files.
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if(TARGET asan)
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list(APPEND CROSS_PROJECT_TEST_DEPS asan)
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endif()
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# llgdb-tests/safestack.c
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if(TARGET safestack)
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list(APPEND CROSS_PROJECT_TEST_DEPS safestack)
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endif()
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endif()
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# Many dexter tests depend on lldb.
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if("lldb" IN_LIST LLVM_ENABLE_PROJECTS)
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list(APPEND CROSS_PROJECT_TEST_DEPS lldb lldb-server)
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endif()
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if ("lld" IN_LIST LLVM_ENABLE_PROJECTS)
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list(APPEND CROSS_PROJECT_TEST_DEPS lld)
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endif()
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configure_lit_site_cfg(
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${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.py.in
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${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg.py
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MAIN_CONFIG
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${CMAKE_CURRENT_SOURCE_DIR}/lit.cfg.py
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)
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add_lit_testsuite(check-cross-project "Running cross-project tests"
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${CMAKE_CURRENT_BINARY_DIR}
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DEPENDS ${CROSS_PROJECT_TEST_DEPS}
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)
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# Add alias for debuginfo test subset.
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add_lit_testsuite(check-debuginfo "Running debuginfo tests"
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${CMAKE_CURRENT_BINARY_DIR}/debuginfo-tests
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EXCLUDE_FROM_CHECK_ALL
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DEPENDS ${CROSS_PROJECT_TEST_DEPS}
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)
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# Add alias for intrinsic header test subset.
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add_lit_testsuite(check-intrinsic-headers "Running intrinsic header tests"
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${CMAKE_CURRENT_BINARY_DIR}/intrinsic-header-tests
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EXCLUDE_FROM_CHECK_ALL
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DEPENDS ${CROSS_PROJECT_TEST_DEPS}
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)
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# AMDGPU tests.
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add_lit_testsuite(check-cross-amdgpu "Running AMDGPU cross-project tests"
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${CMAKE_CURRENT_BINARY_DIR}/amdgpu
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EXCLUDE_FROM_CHECK_ALL
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DEPENDS clang
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)
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# DTLTO tests.
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add_lit_testsuite(check-cross-dtlto "Running DTLTO cross-project tests"
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${CMAKE_CURRENT_BINARY_DIR}/dtlto
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EXCLUDE_FROM_CHECK_ALL
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DEPENDS ${CROSS_PROJECT_TEST_DEPS}
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)
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# Add check-cross-project-* targets.
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add_lit_testsuites(CROSS_PROJECT ${CMAKE_CURRENT_SOURCE_DIR}
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DEPENDS ${CROSS_PROJECT_TEST_DEPS}
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)
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