Initial work to improve documentation for Clang's diagnostics, from Matthieu Monrocq

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129614 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index 1bec393..bf863d7 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -263,6 +263,8 @@
     Res.push_back("-fcolor-diagnostics");
   if (Opts.VerifyDiagnostics)
     Res.push_back("-verify");
+  if (Opts.ShowNames)
+    Res.push_back("-fdiagnostics-show-name");
   if (Opts.ShowOptionNames)
     Res.push_back("-fdiagnostics-show-option");
   if (Opts.ShowCategories == 1)
@@ -997,6 +999,7 @@
   Opts.ShowColumn = !Args.hasArg(OPT_fno_show_column);
   Opts.ShowFixits = !Args.hasArg(OPT_fno_diagnostics_fixit_info);
   Opts.ShowLocation = !Args.hasArg(OPT_fno_show_source_location);
+  Opts.ShowNames = Args.hasArg(OPT_fdiagnostics_show_name);
   Opts.ShowOptionNames = Args.hasArg(OPT_fdiagnostics_show_option);
 
   // Default behavior is to not to show note include stacks.