[all-commits] [llvm/llvm-project] 972168: [libc] New version of the mem* framework

[Guillaume Chatelet via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9721687835a7df5da0c9482cf684c11b8ba97f75
      https://github.com/llvm/llvm-project/commit/9721687835a7df5da0c9482cf684c11b8ba97f75
  Author: Guillaume Chatelet <gchatelet at google.com>
  Date:   2022-10-14 (Fri, 14 Oct 2022)

  Changed paths:
    M libc/src/stdio/printf_core/string_writer.cpp
    M libc/src/string/bcmp.cpp
    M libc/src/string/memcmp.cpp
    M libc/src/string/memmove.cpp
    M libc/src/string/memory_utils/CMakeLists.txt
    A libc/src/string/memory_utils/README.md
    M libc/src/string/memory_utils/bcmp_implementations.h
    R libc/src/string/memory_utils/elements.h
    R libc/src/string/memory_utils/elements_aarch64.h
    R libc/src/string/memory_utils/elements_x86.h
    M libc/src/string/memory_utils/memcmp_implementations.h
    M libc/src/string/memory_utils/memcpy_implementations.h
    M libc/src/string/memory_utils/memset_implementations.h
    A libc/src/string/memory_utils/op_aarch64.h
    A libc/src/string/memory_utils/op_builtin.h
    A libc/src/string/memory_utils/op_generic.h
    A libc/src/string/memory_utils/op_x86.h
    M libc/src/string/memory_utils/utils.h
    M libc/src/string/memset.cpp
    M libc/test/src/string/bcmp_test.cpp
    M libc/test/src/string/memmove_test.cpp
    M libc/test/src/string/memory_utils/CMakeLists.txt
    R libc/test/src/string/memory_utils/elements_test.cpp
    R libc/test/src/string/memory_utils/memory_access_test.cpp
    M libc/test/src/string/memory_utils/utils_test.cpp
    M utils/bazel/llvm-project-overlay/libc/BUILD.bazel

  Log Message:
  -----------
  [libc] New version of the mem* framework

This version is more composable and also simpler at the expense of being more explicit and more verbose. It also provides minimal implementations for ARM platforms.

Codegen can be checked here https://godbolt.org/z/x19zvE59v

Differential Revision: https://reviews.llvm.org/D135134