Use -rewrite-legacy-objc as clang argument for translating 
objective-c's fragile abi, Use -rewrite-objc for translating 
objective-c's modern abi.  // rdar://11143173


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@153877 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp
index 7fd365f..35e6398 100644
--- a/lib/Driver/Driver.cpp
+++ b/lib/Driver/Driver.cpp
@@ -141,6 +141,7 @@
     // -{fsyntax-only,-analyze,emit-ast,S} only run up to the compiler.
   } else if ((PhaseArg = DAL.getLastArg(options::OPT_fsyntax_only)) ||
              (PhaseArg = DAL.getLastArg(options::OPT_rewrite_objc)) ||
+             (PhaseArg = DAL.getLastArg(options::OPT_rewrite_legacy_objc)) ||
              (PhaseArg = DAL.getLastArg(options::OPT__migrate)) ||
              (PhaseArg = DAL.getLastArg(options::OPT__analyze,
                                         options::OPT__analyze_auto)) ||
@@ -1143,6 +1144,8 @@
       return new CompileJobAction(Input, types::TY_Nothing);
     } else if (Args.hasArg(options::OPT_rewrite_objc)) {
       return new CompileJobAction(Input, types::TY_RewrittenObjC);
+    } else if (Args.hasArg(options::OPT_rewrite_legacy_objc)) {
+      return new CompileJobAction(Input, types::TY_RewrittenLegacyObjC);
     } else if (Args.hasArg(options::OPT__analyze, options::OPT__analyze_auto)) {
       return new AnalyzeJobAction(Input, types::TY_Plist);
     } else if (Args.hasArg(options::OPT__migrate)) {