llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT--> @llvm/pr-subscribers-clang Author: None (walkerkd) <details> <summary>Changes</summary> Pass the linker LTO options enabled by the clang '-flto' command line options when targeting bare-metal. --- Full diff: https://github.com/llvm/llvm-project/pull/94738.diff 2 Files Affected: - (modified) clang/lib/Driver/ToolChains/BareMetal.cpp (+15) - (added) clang/test/Driver/baremetal-ld.c (+6) ``````````diff diff --git a/clang/lib/Driver/ToolChains/BareMetal.cpp b/clang/lib/Driver/ToolChains/BareMetal.cpp index 221c481579240..d1bd7821414ec 100644 --- a/clang/lib/Driver/ToolChains/BareMetal.cpp +++ b/clang/lib/Driver/ToolChains/BareMetal.cpp @@ -429,6 +429,7 @@ void baremetal::Linker::ConstructJob(Compilation &C, const JobAction &JA, ArgStringList CmdArgs; auto &TC = static_cast<const toolchains::BareMetal &>(getToolChain()); + const Driver &D = getToolChain().getDriver(); const llvm::Triple::ArchType Arch = TC.getArch(); const llvm::Triple &Triple = getToolChain().getEffectiveTriple(); @@ -466,6 +467,20 @@ void baremetal::Linker::ConstructJob(Compilation &C, const JobAction &JA, TC.AddLinkRuntimeLib(Args, CmdArgs); } + + if (D.isUsingLTO()) { + assert(!Inputs.empty() && "Must have at least one input."); + // Find the first filename InputInfo object. + auto Input = llvm::find_if( + Inputs, [](const InputInfo &II) -> bool { return II.isFilename(); }); + if (Input == Inputs.end()) + // For a very rare case, all of the inputs to the linker are + // InputArg. If that happens, just use the first InputInfo. + Input = Inputs.begin(); + + addLTOOptions(TC, Args, CmdArgs, Output, *Input, + D.getLTOMode() == LTOK_Thin); + } if (TC.getTriple().isRISCV()) CmdArgs.push_back("-X"); diff --git a/clang/test/Driver/baremetal-ld.c b/clang/test/Driver/baremetal-ld.c new file mode 100644 index 0000000000000..ec61b42b6f487 --- /dev/null +++ b/clang/test/Driver/baremetal-ld.c @@ -0,0 +1,6 @@ +// RUN: %clang -### --target=armv7-unknown-none-eabi -mcpu=cortex-m4 --sysroot= -fuse-ld=ld %s 2>&1 | FileCheck --check-prefix=NOLTO %s +// NOLTO: {{".*ld.*"}} {{.*}} +// NOLTO-NOT: "-plugin-opt=mcpu" + +// RUN: %clang -### --target=armv7-unknown-none-eabi -mcpu=cortex-m4 --sysroot= -fuse-ld=ld -flto -O3 %s 2>&1 | FileCheck --check-prefix=LTO %s +// LTO: {{".*ld.*"}} {{.*}} "-plugin-opt=mcpu=cortex-m4" "-plugin-opt=O3" `````````` </details> https://github.com/llvm/llvm-project/pull/94738 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
