Add support for -fno-optimize-sibling-calls. Currently only implemented in the

X86 backend in LLVM.

llvm-svn: 148689

1 files changed, 3 insertions, 0 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 671cfc5a05f..f4576093d8c 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -146,6 +146,8 @@ static void CodeGenOptsToArgs(const CodeGenOptions &Opts,
     Res.push_back("-disable-llvm-optzns");
   if (Opts.DisableRedZone)
     Res.push_back("-disable-red-zone");
+  if (Opts.DisableTailCalls)
+    Res.push_back("-mdisable-tail-calls");
   if (!Opts.DebugCompilationDir.empty()) {
     Res.push_back("-fdebug-compilation-dir");
     Res.push_back(Opts.DebugCompilationDir);
@@ -1098,6 +1100,7 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.CodeModel = Args.getLastArgValue(OPT_mcode_model);
   Opts.DebugPass = Args.getLastArgValue(OPT_mdebug_pass);
   Opts.DisableFPElim = Args.hasArg(OPT_mdisable_fp_elim);
+  Opts.DisableTailCalls = Args.hasArg(OPT_mdisable_tail_calls);
   Opts.FloatABI = Args.getLastArgValue(OPT_mfloat_abi);
   Opts.HiddenWeakVTables = Args.hasArg(OPT_fhidden_weak_vtables);
   Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);