Introduce a -cc1-level option to turn off related result type

inference, to be used (only) by the Objective-C rewriter.

llvm-svn: 133025

clang/lib/Frontend/CompilerInvocation.cpp

@@ -670,6 +670,9 @@ static void LangOptsToArgs(const LangOptions &Opts,
       Res.push_back("-fobjc-gc-only");
     }
   }
+  if (!Opts.ObjCInferRelatedResultType)
+    Res.push_back("-fno-objc-infer-related-result-type");
+  
   if (Opts.AppleKext)
     Res.push_back("-fapple-kext");
   
@@ -1485,6 +1488,9 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
   else if (Args.hasArg(OPT_fobjc_gc))
     Opts.setGCMode(LangOptions::HybridGC);
   
+  if (Args.hasArg(OPT_fno_objc_infer_related_result_type))
+    Opts.ObjCInferRelatedResultType = 0;
+  
   if (Args.hasArg(OPT_fapple_kext)) {
     if (!Opts.CPlusPlus)
       Diags.Report(diag::warn_c_kext);