re PR c++/48029 (ICE in finish_member_declaration() with --param ggc-min-expand=0 --param ggc-min-heapsize=0)

	PR c++/48029
	* stor-layout.c (layout_type): Don't set structural equality
	on arrays of incomplete type.
	* tree.c (type_hash_eq): Handle comparing them properly.
	* cp/pt.c (iterative_hash_template_arg): Remove special case for
	ARRAY_TYPE.

From-SVN: r170853

1 files changed, 9 insertions, 2 deletions

diff --git a/gcc/tree.c b/gcc/tree.c
index c947072..2e1b9a3 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -5981,12 +5981,19 @@ type_hash_eq (const void *va, const void *vb)
       || TREE_TYPE (a->type) != TREE_TYPE (b->type)
       || !attribute_list_equal (TYPE_ATTRIBUTES (a->type),
 				 TYPE_ATTRIBUTES (b->type))
-      || TYPE_ALIGN (a->type) != TYPE_ALIGN (b->type)
-      || TYPE_MODE (a->type) != TYPE_MODE (b->type)
       || (TREE_CODE (a->type) != COMPLEX_TYPE
           && TYPE_NAME (a->type) != TYPE_NAME (b->type)))
     return 0;
 
+  /* Be careful about comparing arrays before and after the element type
+     has been completed; don't compare TYPE_ALIGN unless both types are
+     complete.  */
+  if (COMPLETE_OR_UNBOUND_ARRAY_TYPE_P (a->type)
+      && COMPLETE_OR_UNBOUND_ARRAY_TYPE_P (b->type)
+      && (TYPE_ALIGN (a->type) != TYPE_ALIGN (b->type)
+	  || TYPE_MODE (a->type) != TYPE_MODE (b->type)))
+    return 0;
+
   switch (TREE_CODE (a->type))
     {
     case VOID_TYPE: