Add a MangleContext and pass it to all mangle functions. It will be used for keeping state, such as identifiers assigned to anonymous structs as well as scope encoding.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@83442 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index 50b74f3..246beaa 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -39,7 +39,7 @@
                              Diagnostic &diags)
   : BlockModule(C, M, TD, Types, *this), Context(C),
     Features(C.getLangOptions()), CompileOpts(compileOpts), TheModule(M),
-    TheTargetData(TD), Diags(diags), Types(C, M, TD), Runtime(0),
+    TheTargetData(TD), Diags(diags), Types(C, M, TD), MangleCtx(C), Runtime(0),
     MemCpyFn(0), MemMoveFn(0), MemSetFn(0), CFConstantStringClassRef(0),
     VMContext(M.getContext()) {
 
@@ -166,7 +166,7 @@
 
   llvm::SmallString<256> Name;
   llvm::raw_svector_ostream Out(Name);
-  if (!mangleName(ND, Context, Out)) {
+  if (!mangleName(getMangleContext(), ND, Out)) {
     assert(ND->getIdentifier() && "Attempt to mangle unnamed decl.");
     return ND->getNameAsCString();
   }