1 files changed, 22 insertions, 1 deletions
diff --git a/gcc/function.c b/gcc/function.c
index 76d4834..e8d9901 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -1942,7 +1942,28 @@ use_register_for_decl (const_tree decl)
   if (DECL_IGNORED_P (decl))
     return true;
 
-  return (optimize || DECL_REGISTER (decl));
+  if (optimize)
+    return true;
+
+  if (!DECL_REGISTER (decl))
+    return false;
+
+  switch (TREE_CODE (TREE_TYPE (decl)))
+    {
+    case RECORD_TYPE:
+    case UNION_TYPE:
+    case QUAL_UNION_TYPE:
+      /* When not optimizing, disregard register keyword for variables with
+	 types containing methods, otherwise the methods won't be callable
+	 from the debugger.  */
+      if (TYPE_METHODS (TREE_TYPE (decl)))
+	return false;
+      break;
+    default:
+      break;
+    }
+
+  return true;
 }
 
 /* Return true if TYPE should be passed by invisible reference.  */