1 files changed, 9 insertions, 0 deletions
diff --git a/lib/Sema/TypeLocBuilder.h b/lib/Sema/TypeLocBuilder.h
index 3570737d11..f0944f1205 100644
--- a/lib/Sema/TypeLocBuilder.h
+++ b/lib/Sema/TypeLocBuilder.h
@@ -87,6 +87,15 @@ class TypeLocBuilder {
     Index = Capacity;
   }  
 
+  /// \brief Tell the TypeLocBuilder that the type it is storing has been
+  /// modified in some safe way that doesn't affect type-location information.
+  void TypeWasModifiedSafely(QualType T) {
+#ifndef NDEBUG
+    assert(T.getLocalUnqualifiedType() == LastTy.getLocalUnqualifiedType());
+    LastTy = T;
+#endif
+  }
+  
   /// Pushes space for a new TypeLoc of the given type.  Invalidates
   /// any TypeLocs previously retrieved from this builder.
   template <class TyLocType> TyLocType push(QualType T) {