ASTMangler: add a little utility function to create a mangled name for _typeName constant propagation.

Author: eeckstein

include/swift/AST/ASTMangler.h

@@ -213,6 +213,9 @@ class ASTMangler : public Mangler {
 
   std::string mangleTypeForDebugger(Type decl, const DeclContext *DC);
 
+  /// Create a mangled name to be used for _typeName constant propagation.
+  std::string mangleTypeForTypeName(Type type);
+
   std::string mangleOpaqueTypeDescriptor(const OpaqueTypeDecl *decl);
 
   std::string mangleDeclType(const ValueDecl *decl);

lib/AST/ASTMangler.cpp

@@ -533,6 +533,12 @@ std::string ASTMangler::mangleTypeForDebugger(Type Ty, const DeclContext *DC) {
   return finalize();
 }
 
+std::string ASTMangler::mangleTypeForTypeName(Type type) {
+  beginMangling();
+  appendType(type);
+  return finalize();
+}
+
 std::string ASTMangler::mangleDeclType(const ValueDecl *decl) {
   DWARFMangling = true;
   beginMangling();