re PR c/34993 (ICE with attribute for array with unknown bound)

        PR c/34993
        * tree.c (build_type_attribute_qual_variant): Skip TYPE_DOMAIN
        for unbounded arrays.

From-SVN: r131970

gcc/ChangeLog

+2008-01-30  Richard Henderson  <rth@redhat.com>
+
+	PR c/34993
+	* tree.c (build_type_attribute_qual_variant): Skip TYPE_DOMAIN
+	for unbounded arrays.
+
 2008-01-30  Silvius Rus  <rus@google.com>
 
 	* config/i386/xmmintrin.h (_mm_prefetch): Add const to first arg.

gcc/testsuite/gcc.c-torture/compile/pr34993.c

+/* PR c/34993 */
+
+/* { dg-do compile } */
+
+typedef int x[] __attribute((may_alias));

gcc/tree.c

@@ -3701,8 +3701,9 @@ build_type_attribute_qual_variant (tree ttype, tree attribute, int quals)
 	  hashcode = type_hash_list (TYPE_ARG_TYPES (ntype), hashcode);
 	  break;
 	case ARRAY_TYPE:
-	  hashcode = iterative_hash_object (TYPE_HASH (TYPE_DOMAIN (ntype)),
-					    hashcode);
+	  if (TYPE_DOMAIN (ntype))
+	    hashcode = iterative_hash_object (TYPE_HASH (TYPE_DOMAIN (ntype)),
+					      hashcode);
 	  break;
 	case INTEGER_TYPE:
 	  hashcode = iterative_hash_object