diff options
Diffstat (limited to 'clang/lib/Driver/Tools.cpp')
| -rw-r--r-- | clang/lib/Driver/Tools.cpp | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp index e6bfae6..2467758 100644 --- a/clang/lib/Driver/Tools.cpp +++ b/clang/lib/Driver/Tools.cpp @@ -7882,6 +7882,29 @@ bool darwin::Linker::NeedsTempPath(const InputInfoList &Inputs) const { return false; } +/// \brief Pass -no_deduplicate to ld64 under certain conditions: +/// +/// - Either -O0 or -O1 is explicitly specified +/// - No -O option is specified *and* this is a compile+link (implicit -O0) +/// +/// Also do *not* add -no_deduplicate when no -O option is specified and this +/// is just a link (we can't imply -O0) +static bool shouldLinkerNotDedup(bool IsLinkerOnlyAction, const ArgList &Args) { + if (Arg *A = Args.getLastArg(options::OPT_O_Group)) { + if (A->getOption().matches(options::OPT_O0)) + return true; + if (A->getOption().matches(options::OPT_O)) + return llvm::StringSwitch<bool>(A->getValue()) + .Case("1", true) + .Default(false); + return false; // OPT_Ofast & OPT_O4 + } + + if (!IsLinkerOnlyAction) // Implicit -O0 for compile+linker only. + return true; + return false; +} + void darwin::Linker::AddLinkArgs(Compilation &C, const ArgList &Args, ArgStringList &CmdArgs, const InputInfoList &Inputs) const { @@ -7938,6 +7961,10 @@ void darwin::Linker::AddLinkArgs(Compilation &C, const ArgList &Args, } } + // ld64 version 262 and above run the deduplicate pass by default. + if (Version[0] >= 262 && shouldLinkerNotDedup(C.getJobs().empty(), Args)) + CmdArgs.push_back("-no_deduplicate"); + // Derived from the "link" spec. Args.AddAllArgs(CmdArgs, options::OPT_static); if (!Args.hasArg(options::OPT_static)) |