Implement -mrtd which sets the StdCall calling convention to be the default
one.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126756 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Driver/CC1Options.td b/include/clang/Driver/CC1Options.td
index 7c103ba..0696f7d 100644
--- a/include/clang/Driver/CC1Options.td
+++ b/include/clang/Driver/CC1Options.td
@@ -157,6 +157,8 @@
   HelpText<"Limit the number of registers available for integer arguments">;
 def mrelax_all : Flag<"-mrelax-all">,
   HelpText<"Relax all machine instructions">;
+def mrtd: Flag<"-mrtd">,
+  HelpText<"Make StdCall calling convention the default">;
 def mrelocation_model : Separate<"-mrelocation-model">,
   HelpText<"The relocation model to use">;
 def munwind_tables : Flag<"-munwind-tables">,