Add a new -rewrite-test option, which is basically a 
playground to experiment with some new rewriter approaches. For now
it is probably the most complex version of 'cat' ever invented.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57406 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Driver/clang.h b/Driver/clang.h
index ddb5dcb..8294675 100644
--- a/Driver/clang.h
+++ b/Driver/clang.h
@@ -32,6 +32,10 @@
 /// RewriteMacrosInInput - Implement -rewrite-macros mode.
 void RewriteMacrosInInput(Preprocessor &PP, const std::string &InFileName,
                           const std::string& OutFile);
+
+void DoRewriteTest(Preprocessor &PP, const std::string &InFileName,
+                   const std::string &OutFileName);
+    
   
 /// CreatePrintParserActionsAction - Return the actions implementation that
 /// implements the -parse-print-callbacks option.