This creates a couple of record subtypes pointing to each other through
access subtypes, and we break the circularity at the latter subtypes.
Tested on x86_64-pc-linux-gnu, committed on trunk
gcc/ada/
* gcc-interface/decl.cc (gnat_to_gnu_entity) <E_Record_Subtype>: If
it is a special subtype designated by an access subtype, then defer
the completion of incomplete types.diff --git a/gcc/ada/gcc-interface/decl.cc b/gcc/ada/gcc-interface/decl.cc
--- a/gcc/ada/gcc-interface/decl.cc
+++ b/gcc/ada/gcc-interface/decl.cc
@@ -2134,6 +2134,8 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, bool definition)
suppress expanding incomplete types. */
gnu_type = make_node (UNCONSTRAINED_ARRAY_TYPE);
+ /* The component may refer to this type, so defer completion of any
+ incomplete types. */
if (!definition)
{
defer_incomplete_level++;
@@ -3066,7 +3068,8 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, bool definition)
process_attributes (&gnu_type, &attr_list, true, gnat_entity);
- /* If we are not defining it, suppress expanding incomplete types. */
+ /* Some component may refer to this type, so defer completion of any
+ incomplete types. */
if (!definition)
{
defer_incomplete_level++;
@@ -3439,7 +3442,14 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, bool definition)
{
Entity_Id gnat_base_type = Implementation_Base_Type (gnat_entity);
- if (!definition)
+ /* Some component may refer to this type, so defer completion of any
+ incomplete types. We also need to do it for the special subtypes
+ designated by access subtypes in case they are recursive, see the
+ E_Access_Subtype case below. */
+ if (!definition
+ || (Is_Itype (gnat_entity)
+ && Is_Frozen (gnat_entity)
+ && No (Freeze_Node (gnat_entity))))
{
defer_incomplete_level++;
this_deferred = true;
