ilinpv created this revision. ilinpv added reviewers: willlovett, ktkachov. Herald added subscribers: danielkiss, jfb, kristof.beyls. ilinpv requested review of this revision. Herald added a project: clang. Herald added a subscriber: cfe-commits.
Description for AArch64 -moutline-atomics, -mno-outline-atomics options added to release notes. Repository: rG LLVM Github Monorepo https://reviews.llvm.org/D97510 Files: clang/docs/ReleaseNotes.rst Index: clang/docs/ReleaseNotes.rst =================================================================== --- clang/docs/ReleaseNotes.rst +++ clang/docs/ReleaseNotes.rst @@ -73,6 +73,15 @@ - ... +- AArch64 options ``-moutline-atomics``, ``-mno-outline-atomics`` to enable + and disable calls to helper functions implementing atomic operations. These + out-of-line helpers like '__aarch64_cas8_relax' will detect at runtime + AArch64 Large System Extensions (LSE) availability and either use their + atomic instructions, or falls back to LL/SC loop. These options do not apply, + if compilation target supports LSE. Atomic instruction are used directly in + that case. The options behaviour mirrors GCC, the helpers are implemented + both in compiler-rt and libgcc. + - -fpch-codegen and -fpch-debuginfo generate shared code and/or debuginfo for contents of a precompiled header in a separate object file. This object file needs to be linked in, but its contents do not need to be generated
Index: clang/docs/ReleaseNotes.rst =================================================================== --- clang/docs/ReleaseNotes.rst +++ clang/docs/ReleaseNotes.rst @@ -73,6 +73,15 @@ - ... +- AArch64 options ``-moutline-atomics``, ``-mno-outline-atomics`` to enable + and disable calls to helper functions implementing atomic operations. These + out-of-line helpers like '__aarch64_cas8_relax' will detect at runtime + AArch64 Large System Extensions (LSE) availability and either use their + atomic instructions, or falls back to LL/SC loop. These options do not apply, + if compilation target supports LSE. Atomic instruction are used directly in + that case. The options behaviour mirrors GCC, the helpers are implemented + both in compiler-rt and libgcc. + - -fpch-codegen and -fpch-debuginfo generate shared code and/or debuginfo for contents of a precompiled header in a separate object file. This object file needs to be linked in, but its contents do not need to be generated
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