Check in the beginnings of my new vtable layout builder idea.

Right now, it's off by default but can be tested by passing -fdump-vtable-layouts to clang -cc1. This option will cause all vtables that will normally be emitted as part of codegen to also be dumped using the new layout code.

I've also added a very simple new vtable layout test case.

llvm-svn: 95865

1 files changed, 2 insertions, 1 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 2a63cda..7287d42 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1166,7 +1166,7 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args,
   if (Args.hasArg(OPT_fno_lax_vector_conversions))
     Opts.LaxVectorConversions = 0;
   if (Args.hasArg(OPT_fno_threadsafe_statics))
-    Opts.ThreadsafeStatics = 0;  
+    Opts.ThreadsafeStatics = 0;
   Opts.Exceptions = Args.hasArg(OPT_fexceptions);
   Opts.RTTI = !Args.hasArg(OPT_fno_rtti);
   Opts.Blocks = Args.hasArg(OPT_fblocks);
@@ -1193,6 +1193,7 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args,
   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
   Opts.SjLjExceptions = Args.hasArg(OPT_fsjlj_exceptions);
   Opts.Static = Args.hasArg(OPT_static_define);
+  Opts.DumpVtableLayouts = Args.hasArg(OPT_fdump_vtable_layouts);
   Opts.OptimizeSize = 0;
 
   // FIXME: Eliminate this dependency.