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| author | Rainer Orth <ro@gcc.gnu.org> | 2022-07-29 09:19:38 +0200 |
|---|---|---|
| committer | Tom Stellard <tstellar@redhat.com> | 2022-08-02 01:53:12 -0700 |
| commit | 0b96bce063b1cb0c118c94704b7ca778b687b239 (patch) | |
| tree | 9f6ef057b4125109d086f532490623c89718c6f0 /clang/lib | |
| parent | 12e4e9777975858ea7f5f2a80157b0543c1f0c72 (diff) | |
| download | llvm-0b96bce063b1cb0c118c94704b7ca778b687b239.zip llvm-0b96bce063b1cb0c118c94704b7ca778b687b239.tar.gz llvm-0b96bce063b1cb0c118c94704b7ca778b687b239.tar.bz2 | |
[Driver] Use libatomic for 32-bit SPARC atomics support on Linux
This is the Linux/sparc64 equivalent to D118021
<https://reviews.llvm.org/D118021>, necessary to provide an external
implementation of atomics on 32-bit SPARC which LLVM cannot inline even
with `-mcpu=v9` or an equivalent default.
Tested on `sparc64-unknown-linux-gnu`.
Differential Revision: https://reviews.llvm.org/D130569
(cherry picked from commit 9b1897bbd0e3a6e9ef099e74c3d3ed35428c0460)
Diffstat (limited to 'clang/lib')
| -rw-r--r-- | clang/lib/Driver/ToolChains/Gnu.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp index 34396b0..f203cae 100644 --- a/clang/lib/Driver/ToolChains/Gnu.cpp +++ b/clang/lib/Driver/ToolChains/Gnu.cpp @@ -631,6 +631,16 @@ void tools::gnutools::Linker::ConstructJob(Compilation &C, const JobAction &JA, AddRunTimeLibs(ToolChain, D, CmdArgs, Args); + // LLVM support for atomics on 32-bit SPARC V8+ is incomplete, so + // forcibly link with libatomic as a workaround. + // TODO: Issue #41880 and D118021. + if (getToolChain().getTriple().getArch() == llvm::Triple::sparc) { + CmdArgs.push_back("--push-state"); + CmdArgs.push_back("--as-needed"); + CmdArgs.push_back("-latomic"); + CmdArgs.push_back("--pop-state"); + } + if (WantPthread && !isAndroid) CmdArgs.push_back("-lpthread"); |