[all-commits] [llvm/llvm-project] c5e7e6: [AArch64][Clang][Linux] Enable out-of-line atomics...

[Pavel Iliin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c5e7e649d537067dec7111f3de1430d0fc8a4d11
      https://github.com/llvm/llvm-project/commit/c5e7e649d537067dec7111f3de1430d0fc8a4d11
  Author: Pavel Iliin <Pavel.Iliin at arm.com>
  Date:   2021-01-29 (Fri, 29 Jan 2021)

  Changed paths:
    M clang/include/clang/Driver/ToolChain.h
    M clang/lib/Driver/ToolChains/Clang.cpp
    M clang/lib/Driver/ToolChains/Linux.cpp
    M clang/lib/Driver/ToolChains/Linux.h
    A clang/test/Driver/Inputs/aarch64-linux-gnu-tree/gcc-10/lib/gcc/aarch64-unknown-linux-gnu/10/crtbegin.o
    A clang/test/Driver/Inputs/aarch64-linux-gnu-tree/gcc-10/lib/gcc/aarch64-unknown-linux-gnu/10/libgcc.a
    A clang/test/Driver/Inputs/aarch64-linux-gnu-tree/gcc-7.5.0/lib/gcc/aarch64-unknown-linux-gnu/7.5.0/crtbegin.o
    A clang/test/Driver/Inputs/aarch64-linux-gnu-tree/gcc-7.5.0/lib/gcc/aarch64-unknown-linux-gnu/7.5.0/libgcc.a
    A clang/test/Driver/Inputs/aarch64-linux-gnu-tree/gcc-9.3.0/lib/gcc/aarch64-unknown-linux-gnu/9.3.0/crtbegin.o
    A clang/test/Driver/Inputs/aarch64-linux-gnu-tree/gcc-9.3.0/lib/gcc/aarch64-unknown-linux-gnu/9.3.0/libgcc.a
    A clang/test/Driver/Inputs/aarch64-linux-gnu-tree/gcc-9.3.1/lib/gcc/aarch64-unknown-linux-gnu/9.3.1/crtbegin.o
    A clang/test/Driver/Inputs/aarch64-linux-gnu-tree/gcc-9.3.1/lib/gcc/aarch64-unknown-linux-gnu/9.3.1/libgcc.a
    M clang/test/Driver/aarch64-features.c

  Log Message:
  -----------
  [AArch64][Clang][Linux] Enable out-of-line atomics by default.

Generate outline atomics if compiling for armv8-a non-LSE AArch64 Linux
(including Android) targets to use LSE instructions, if they are available,
at runtime. Library support is checked by clang driver which doesn't enable
outline atomics if no proper libraries (libgcc >= 9.3.1 or compiler-rt) found.

Differential Revision: https://reviews.llvm.org/D93585