diff options
Diffstat (limited to 'lib/Driver/Tools.cpp')
| -rw-r--r-- | lib/Driver/Tools.cpp | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp index 50b9b418e1..68edd66f5f 100644 --- a/lib/Driver/Tools.cpp +++ b/lib/Driver/Tools.cpp @@ -1195,6 +1195,24 @@ static void addAsanRTLinux(const ToolChain &TC, const ArgList &Args, CmdArgs.push_back("-export-dynamic"); } +static bool shouldUseFramePointer(const ArgList &Args, + const llvm::Triple &Triple) { + if (Arg *A = Args.getLastArg(options::OPT_fno_omit_frame_pointer, + options::OPT_fomit_frame_pointer)) + return A->getOption().matches(options::OPT_fno_omit_frame_pointer); + + // Don't use a frame poiter on liunx x86 and x86_64 if optimizing. + if ((Triple.getArch() == llvm::Triple::x86_64 || + Triple.getArch() == llvm::Triple::x86) && + Triple.getOS() == llvm::Triple::Linux) { + if (Arg *A = Args.getLastArg(options::OPT_O_Group)) + if (!A->getOption().matches(options::OPT_O0)) + return false; + } + + return true; +} + void Clang::ConstructJob(Compilation &C, const JobAction &JA, const InputInfo &Output, const InputInfoList &Inputs, @@ -1408,8 +1426,7 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA, CmdArgs.push_back("-mrtd"); // FIXME: Set --enable-unsafe-fp-math. - if (Args.hasFlag(options::OPT_fno_omit_frame_pointer, - options::OPT_fomit_frame_pointer)) + if (shouldUseFramePointer(Args, getToolChain().getTriple())) CmdArgs.push_back("-mdisable-fp-elim"); if (!Args.hasFlag(options::OPT_fzero_initialized_in_bss, options::OPT_fno_zero_initialized_in_bss)) |