Provide an extremely unsatisfactory diagnostic (instead of crashing) when

mangling an unknown expression kind.  Also conveniently tells the user what
kind of expression they should add to the mangler!

llvm-svn: 100907

clang/lib/CodeGen/CodeGenModule.cpp

@@ -47,7 +47,8 @@ CodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO,
     Features(C.getLangOptions()), CodeGenOpts(CGO), TheModule(M),
     TheTargetData(TD), TheTargetCodeGenInfo(0), Diags(diags),
     Types(C, M, TD, getTargetCodeGenInfo().getABIInfo()),
-    MangleCtx(C), VTables(*this), Runtime(0), CFConstantStringClassRef(0),
+    MangleCtx(C, diags), VTables(*this), Runtime(0),
+    CFConstantStringClassRef(0),
     VMContext(M.getContext()) {
 
   if (!Features.ObjC1)