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GGitHub[Clang] Gut the libc wrapper headers and simplify (#168438)

7fe35641创建于 2025年11月19日历史提交

文件	最后提交记录	最后更新时间
compiler_features	[libc] Add check for support and a test for libc SIMD helpers (#157746) Summary: This adds a few basic tests for the SIMD helpers and adds a CMake variable we can use to detect support.	11 个月前
cpu_features	[libc] add cpu feature flags for SVE/SVE2/MOPS (#166884) Add in SVE/SVE2/MOPS features for aarch64 cpus. These features may be interesting for future memory/math routines. SVE/SVE2 are now being accepted in more implementations: ❯ echo | clang-21 -dM -E - -march=native | grep -i ARM_FEAT #define __ARM_FEATURE_ATOMICS 1 #define __ARM_FEATURE_BF16 1 #define __ARM_FEATURE_BF16_SCALAR_ARITHMETIC 1 #define __ARM_FEATURE_BF16_VECTOR_ARITHMETIC 1 #define __ARM_FEATURE_BTI 1 #define __ARM_FEATURE_CLZ 1 #define __ARM_FEATURE_COMPLEX 1 #define __ARM_FEATURE_CRC32 1 #define __ARM_FEATURE_DIRECTED_ROUNDING 1 #define __ARM_FEATURE_DIV 1 #define __ARM_FEATURE_DOTPROD 1 #define __ARM_FEATURE_FMA 1 #define __ARM_FEATURE_FP16_SCALAR_ARITHMETIC 1 #define __ARM_FEATURE_FP16_VECTOR_ARITHMETIC 1 #define __ARM_FEATURE_FRINT 1 #define __ARM_FEATURE_IDIV 1 #define __ARM_FEATURE_JCVT 1 #define __ARM_FEATURE_LDREX 0xF #define __ARM_FEATURE_MATMUL_INT8 1 #define __ARM_FEATURE_NUMERIC_MAXMIN 1 #define __ARM_FEATURE_PAUTH 1 #define __ARM_FEATURE_QRDMX 1 #define __ARM_FEATURE_RCPC 1 #define __ARM_FEATURE_SVE 1 #define __ARM_FEATURE_SVE2 1 #define __ARM_FEATURE_SVE_BF16 1 #define __ARM_FEATURE_SVE_MATMUL_INT8 1 #define __ARM_FEATURE_SVE_VECTOR_OPERATORS 2 #define __ARM_FEATURE_UNALIGNED 1 MOPS is another set of extension for string operations, but may not be generally available for now: ❯ echo | clang-21 -dM -E - -march=armv9.2a+mops | grep -i MOPS #define __ARM_FEATURE_MOPS 1	9 个月前
system_features	[libc] Add base for target config within cmake (#72318) Currently the only way to add or remove entrypoints is to modify the entrypoints.txt file for the current target. This isn't ideal since a user would have to carry a diff for this file when updating their checkout. This patch adds a basic mechanism to allow the user to remove entrypoints without modifying the repository.	2 年前
CheckCompilerFeatures.cmake	[libc] Add check for support and a test for libc SIMD helpers (#157746) Summary: This adds a few basic tests for the SIMD helpers and adds a CMake variable we can use to detect support.	11 个月前
LLVMLibCArchitectures.cmake	Revert "[libc][test] split exit tests into two separate tests" (#168102) Reverts llvm/llvm-project#166355	9 个月前
LLVMLibCCheckCpuFeatures.cmake	[libc] add cpu feature flags for SVE/SVE2/MOPS (#166884) Add in SVE/SVE2/MOPS features for aarch64 cpus. These features may be interesting for future memory/math routines. SVE/SVE2 are now being accepted in more implementations: ❯ echo | clang-21 -dM -E - -march=native | grep -i ARM_FEAT #define __ARM_FEATURE_ATOMICS 1 #define __ARM_FEATURE_BF16 1 #define __ARM_FEATURE_BF16_SCALAR_ARITHMETIC 1 #define __ARM_FEATURE_BF16_VECTOR_ARITHMETIC 1 #define __ARM_FEATURE_BTI 1 #define __ARM_FEATURE_CLZ 1 #define __ARM_FEATURE_COMPLEX 1 #define __ARM_FEATURE_CRC32 1 #define __ARM_FEATURE_DIRECTED_ROUNDING 1 #define __ARM_FEATURE_DIV 1 #define __ARM_FEATURE_DOTPROD 1 #define __ARM_FEATURE_FMA 1 #define __ARM_FEATURE_FP16_SCALAR_ARITHMETIC 1 #define __ARM_FEATURE_FP16_VECTOR_ARITHMETIC 1 #define __ARM_FEATURE_FRINT 1 #define __ARM_FEATURE_IDIV 1 #define __ARM_FEATURE_JCVT 1 #define __ARM_FEATURE_LDREX 0xF #define __ARM_FEATURE_MATMUL_INT8 1 #define __ARM_FEATURE_NUMERIC_MAXMIN 1 #define __ARM_FEATURE_PAUTH 1 #define __ARM_FEATURE_QRDMX 1 #define __ARM_FEATURE_RCPC 1 #define __ARM_FEATURE_SVE 1 #define __ARM_FEATURE_SVE2 1 #define __ARM_FEATURE_SVE_BF16 1 #define __ARM_FEATURE_SVE_MATMUL_INT8 1 #define __ARM_FEATURE_SVE_VECTOR_OPERATORS 2 #define __ARM_FEATURE_UNALIGNED 1 MOPS is another set of extension for string operations, but may not be generally available for now: ❯ echo | clang-21 -dM -E - -march=armv9.2a+mops | grep -i MOPS #define __ARM_FEATURE_MOPS 1	9 个月前
LLVMLibCCheckMPC.cmake	[libc] Update include directory for libcMPCWrapper target when LIBC_MPC_INSTALL_PATH is set. (#124810)	1 年前
LLVMLibCCheckMPFR.cmake	[libc] Fix unit test compile flags propagation. (#106128) With this change, I was able to build and test for aarch64 & riscv64 on x86-64 host as follow: Pre-requisite: - cross build toolchain for aarch64 $ sudo apt install binutils-aarch64-linux-gnu gcc-aarch64-linux-gnu g++-aarch64-linux-gnu - cross build toolchain for riscv64 $ sudo apt install binutils-riscv64-linux-gnu gcc-riscv64-linux-gnu g++-riscv64-linux-gnu - qemu user: $ sudo apt install qemu qemu-user qemu-user-static CMake invocation: $ cmake ../runtimes -GNinja -DLLVM_ENABLE_RUNTIMES=libc -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DLIBC_TARGET_TRIPLE=<aarch64-linux-gnu/riscv64-linux-gnu> -DCMAKE_BUILD_TYPE=Release -DLIBC_TEST_COMPILE_OPTIONS_DEFAULT="-static" $ ninja libc $ ninja check-libc	1 年前
LLVMLibCCompileOptionRules.cmake	Move LIBC_CONF_STRING_UNSAFE_WIDE_READ to top-level libc-configuration (#165046) This options sets a compile option when building sources inside the string directory, and this option affects string_utils.h. But string_utils.h is #included from more places than just the string directory (such as from __support/CPP/string.h), leading to both narrow-reads in those cases, but more seriously, ODR violations when the two different string_length implementations are included int he same program. Having this option at the top level avoids this problem.	9 个月前
LLVMLibCFlagRules.cmake	[libc] Simplify fma handling for riscv (#149673) This PR simplifies how we enable the different fma configs for riscv: 1. Removes __LIBC_RISCV_USE_FMA define 2. Checks if __riscv_flen is defined to set LIBC_TARGET_CPU_HAS_FMA As a bonus, we enable *FMA_OPT tests for rv32, so any rv32 hardware that doesn't implement the f/d extensions is also covered by the tests.	1 年前
LLVMLibCHeaderRules.cmake	[Clang] Gut the libc wrapper headers and simplify (#168438) Summary: These were originally intended to represent the functions that are present on the GPU as to be provided by the LLVM libc implementation. The original plan was that LLVM libc would report which functions were supported and then the offload interface would mark those as supported. The problem is that these wrapper headers are very difficult to make work given the various libc extensions everyone does so they were extremely fragile. OpenMP already declares all functions used inside of a target region as implicitly host / device, while these headers weren't even used for CUDA / HIP yet anyway. The only things we need to define right now are the stdio FILE types. If we want to make this work for CUDA we'd need to define these manually, but we're a ways off and that's way easier because they do proper overloading.	9 个月前
LLVMLibCLibraryRules.cmake	[libc][NFC] Remove unused add_redirector_object and add_redirector_library in cmake. (#156485)	11 个月前
LLVMLibCObjectRules.cmake	[libc][NFC] Remove unused add_redirector_object and add_redirector_library in cmake. (#156485)	11 个月前
LLVMLibCRules.cmake	[libc] Move compile options to new cmake file (#81917) The cmake test generator needed to be updated to support the same flags as the source. To simplify the code, I moved it to a new file.	2 年前
LLVMLibCTargetNameUtils.cmake	[libc] Add fully-qualified target names. Only targets setup by the special LLVM libc rules now have fully qualified names. The naming style is similar to fully qualified names in Python. Reviewers: abrachet, PaulkaToast, phosek Differential Revision: https://reviews.llvm.org/D77340	6 年前
LLVMLibCTestRules.cmake	Revert "[libc] Add -Werror for libc tests" (#164684) Reverts llvm/llvm-project#160413	9 个月前
LibcConfig.cmake	[libc] Fix missing default value for errno config (#100175) Summary: The configs all need default values which targets then override. This one was an empty string which made the logic report an error. The only reason it wasn't a build failure was because of a stray :.	2 年前
LibcParseArguments.cmake	[libc][NFC] Add cmake facility to unify the way we parse arguments. (#156922) Also this will allow all arguments to have overlay-only and full-build-only options.	11 个月前
prepare_libc_gpu_build.cmake	[LLVM] Simplify GPU runtimes flag handling (#159802) Summary: The AMDGPU hack can be removed, and we no longer need to skip 90% of the HandleLLVMOptions if we work around NVPTX earlier. Simplifies the interface by removing duplicated logic and keeps the GPU targets from being weirdly divergent on some flags.	10 个月前