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[CMake] Add VE cache file (#65921)
Add VE cache file for the ease of compiling.
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‎clang/cmake/caches/VectorEngine.cmake

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# This file sets up a CMakeCache for the simple VE build.
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#
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# VE is a CPU with vector engine. But it is a connected to a host CPU as
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# an accelerator. So, we compile programs for VE on a host using clang/llvm
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# as a cross compiler. Therefore, the purpose of this cache file is to
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# compile clang/llvm supporting both targets.
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#
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# Configure:
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# cmake -G Ninja -DCMAKE_BUILD_TYPE=Release
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# -C <llvm_src_root>/clang/cmake/caches/VectorEngine.cmake
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# <llvm_src_root>/llvm-project/llvm
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# Build:
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# ninja
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#
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# Disable TERMINFO, ZLIB, and ZSTD for VE since there is no pre-compiled
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# libraries.
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set(LLVM_ENABLE_TERMINFO OFF CACHE BOOL "")
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set(LLVM_ENABLE_ZLIB OFF CACHE BOOL "")
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set(LLVM_ENABLE_ZSTD OFF CACHE BOOL "")
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# Enable per-target runtimes directory
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set(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR On CACHE BOOL "")
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# The lld is not supported for VE yet.
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set(LLVM_ENABLE_PROJECTS "clang;clang-tools-extra" CACHE STRING "")
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set(LLVM_ENABLE_RUNTIMES "compiler-rt;libcxx;libcxxabi;libunwind;openmp" CACHE STRING "")
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# Compile for X86 and VE
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set(LLVM_TARGETS_TO_BUILD "X86;VE" CACHE STRING "")
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# Not use default here to use RUNTIMES_x86_64-unknown-linux-gnu_* variables.
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set(LLVM_BUILTIN_TARGETS "x86_64-unknown-linux-gnu;ve-unknown-linux-gnu" CACHE STRING "")
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set(LLVM_RUNTIME_TARGETS "x86_64-unknown-linux-gnu;ve-unknown-linux-gnu" CACHE STRING "")
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# For the case of X86, we don't want to test compiler-rt for x86,
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# so disable them as much as possible.
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set(RUNTIMES_x86_64-unknown-linux-gnu_COMPILER_RT_BUILD_BUILTINS ON CACHE BOOL "")
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set(RUNTIMES_x86_64-unknown-linux-gnu_COMPILER_RT_BUILD_CRT OFF CACHE BOOL "")
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set(RUNTIMES_x86_64-unknown-linux-gnu_COMPILER_RT_BUILD_SANITIZERS OFF CACHE BOOL "")
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set(RUNTIMES_x86_64-unknown-linux-gnu_COMPILER_RT_BUILD_XRAY OFF CACHE BOOL "")
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set(RUNTIMES_x86_64-unknown-linux-gnu_COMPILER_RT_BUILD_LIBFUZZER OFF CACHE BOOL "")
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set(RUNTIMES_x86_64-unknown-linux-gnu_COMPILER_RT_BUILD_PROFILE OFF CACHE BOOL "")
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set(RUNTIMES_x86_64-unknown-linux-gnu_COMPILER_RT_BUILD_MEMPROF OFF CACHE BOOL "")
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set(RUNTIMES_x86_64-unknown-linux-gnu_COMPILER_RT_BUILD_ORC OFF CACHE BOOL "")
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set(RUNTIMES_x86_64-unknown-linux-gnu_COMPILER_RT_BUILD_GWP_ASAN OFF CACHE BOOL "")
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# VE supports builtins, crt, and profile only.
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set(RUNTIMES_ve-unknown-linux-gnu_COMPILER_RT_BUILD_BUILTINS ON CACHE BOOL "")
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set(RUNTIMES_ve-unknown-linux-gnu_COMPILER_RT_BUILD_CRT ON CACHE BOOL "")
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set(RUNTIMES_ve-unknown-linux-gnu_COMPILER_RT_BUILD_SANITIZERS OFF CACHE BOOL "")
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set(RUNTIMES_ve-unknown-linux-gnu_COMPILER_RT_BUILD_XRAY OFF CACHE BOOL "")
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set(RUNTIMES_ve-unknown-linux-gnu_COMPILER_RT_BUILD_LIBFUZZER OFF CACHE BOOL "")
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set(RUNTIMES_ve-unknown-linux-gnu_COMPILER_RT_BUILD_PROFILE ON CACHE BOOL "")
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set(RUNTIMES_ve-unknown-linux-gnu_COMPILER_RT_BUILD_MEMPROF OFF CACHE BOOL "")
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set(RUNTIMES_ve-unknown-linux-gnu_COMPILER_RT_BUILD_ORC OFF CACHE BOOL "")
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set(RUNTIMES_ve-unknown-linux-gnu_COMPILER_RT_BUILD_GWP_ASAN OFF CACHE BOOL "")
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# VE uses builtins from Compiler-RT.
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set(RUNTIMES_ve-unknown-linux-gnu_COMPILER_RT_USE_BUILTINS_LIBRARY TRUE CACHE BOOL "")
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# VE uses libunwind and Compiler-RT from libcxxabi.
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set(RUNTIMES_ve-unknown-linux-gnu_LIBCXXABI_USE_LLVM_UNWINDER TRUE CACHE BOOL "")
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set(RUNTIMES_ve-unknown-linux-gnu_LIBCXXABI_USE_COMPILER_RT TRUE CACHE BOOL "")
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# VE uses Compiler-RT from libcxx.
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set(RUNTIMES_ve-unknown-linux-gnu_LIBCXX_USE_COMPILER_RT TRUE CACHE BOOL "")
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# Pretended standalone build for OpenMP since OpenMP doesn't support
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# LLVM_ENABLE_PER_TARGET_RUNTIME_DIR yet.
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# - Use OPENMP_STANDALONE_BUILD
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# - Define OPENMP_LIBDIR_SUFFIX to pretend per-target openmp directory
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# - Define OPENMP_LLVM_TOOLS_DIR for test
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set(RUNTIMES_x86_64-unknown-linux-gnu_OPENMP_STANDALONE_BUILD ON CACHE BOOL "")
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set(RUNTIMES_ve-unknown-linux-gnu_OPENMP_STANDALONE_BUILD ON CACHE BOOL "")
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# Specify LIBDIR_SUFFIX for OpenMP to install them at following directories.
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# install/lib/clang/${VERSION}/lib/x86_64-unknown-linux-gnu
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# install/lib/clang/${VERSION}/lib/ve-unknown-linux-gnu
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set(RUNTIMES_x86_64-unknown-linux-gnu_OPENMP_LIBDIR_SUFFIX "/x86_64-unknown-linux-gnu" CACHE STRING "")
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set(RUNTIMES_ve-unknown-linux-gnu_OPENMP_LIBDIR_SUFFIX "/ve-unknown-linux-gnu" CACHE STRING "")
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# Specify OPENMP_LLVM_TOOLS_DIR for test
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set(RUNTIMES_x86_64-unknown-linux-gnu_OPENMP_LLVM_TOOLS_DIR "${CMAKE_BINARY_DIR}/bin" CACHE STRING "")
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set(RUNTIMES_ve-unknown-linux-gnu_OPENMP_LLVM_TOOLS_DIR "${CMAKE_BINARY_DIR}/bin" CACHE STRING "")
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# VE doesn't support libomptarget. Disable it for x86_64 also.
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set(RUNTIMES_x86_64-unknown-linux-gnu_OPENMP_ENABLE_LIBOMPTARGET FALSE CACHE BOOL "")
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set(RUNTIMES_ve-unknown-linux-gnu_OPENMP_ENABLE_LIBOMPTARGET FALSE CACHE BOOL "")
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# VE requires -lrt flag for shm_open.
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set(RUNTIMES_ve-unknown-linux-gnu_LIBOMP_HAVE_SHM_OPEN_WITH_LRT TRUE CACHE BOOL "")
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# Compiler flags for testing
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set(RUNTIMES_ve-unknown-linux-gnu_COMPILER_RT_TEST_COMPILER_CFLAGS "--target=ve-unknown-linux-gnu" CACHE BOOL "")
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set(RUNTIMES_ve-unknown-linux-gnu_LIBCXXABI_TEST_COMPILER_CFLAGS "--target=ve-unknown-linux-gnu" CACHE BOOL "")
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set(RUNTIMES_ve-unknown-linux-gnu_LIBCXX_TEST_COMPILER_CFLAGS "--target=ve-unknown-linux-gnu" CACHE BOOL "")
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set(RUNTIMES_ve-unknown-linux-gnu_LIBUNWIND_TEST_COMPILER_CFLAGS "--target=ve-unknown-linux-gnu" CACHE BOOL "")
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set(RUNTIMES_ve-unknown-linux-gnu_OPENMP_TEST_OPENMP_FLAGS "--target=ve-unknown-linux-gnu -fopenmp -pthread -lrt -ldl -Wl,-rpath,${CMAKE_BINARY_DIR}/lib/ve-unknown-linux-gnu" CACHE BOOL "")
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# setup toolchain
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set(LLVM_INSTALL_TOOLCHAIN_ONLY ON CACHE BOOL "")
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set(LLVM_TOOLCHAIN_TOOLS
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dsymutil
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llc
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llvm-ar
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llvm-cxxfilt
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llvm-cov
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llvm-dwarfdump
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llvm-link
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llvm-nm
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llvm-objdump
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llvm-profdata
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llvm-ranlib
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llvm-readelf
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llvm-readobj
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llvm-size
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llvm-symbolizer
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opt
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CACHE STRING "")
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set(LLVM_DISTRIBUTION_COMPONENTS
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clang
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clang-format
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clang-resource-headers
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builtins
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runtimes
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${LLVM_TOOLCHAIN_TOOLS}
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CACHE STRING "")

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