1 files changed, 10 insertions, 0 deletions
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 1cc1369f330..c688763e69d 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -1655,6 +1655,12 @@ void Clang::AddSparcTargetArgs(const ArgList &Args,
   }
 }
 
+void Clang::AddSystemZTargetArgs(const ArgList &Args,
+                                 ArgStringList &CmdArgs) const {
+  if (Args.hasFlag(options::OPT_mbackchain, options::OPT_mno_backchain, false))
+    CmdArgs.push_back("-mbackchain");
+}
+
 static const char *getSystemZTargetCPU(const ArgList &Args) {
   if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
     return A->getValue();
@@ -4241,6 +4247,10 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
     AddSparcTargetArgs(Args, CmdArgs);
     break;
 
+  case llvm::Triple::systemz:
+    AddSystemZTargetArgs(Args, CmdArgs);
+    break;
+
   case llvm::Triple::x86:
   case llvm::Triple::x86_64:
     AddX86TargetArgs(Args, CmdArgs);