This patch fixes a testsuite failure when -fdebug-types-section is turned on, where the order of type stub DIEs is dependent on hash table traversal order.
Backported from trunk at r199927. Bootstrapped, tested, and committed. -cary 2013-06-10 Cary Coutant <ccout...@google.com> gcc/ * dwarf2out.c (hash_external_ref): Use die_symbol or signature for hash so that hash table traversal order is deterministic. Index: dwarf2out.c =================================================================== --- dwarf2out.c (revision 199902) +++ dwarf2out.c (working copy) @@ -7405,7 +7405,17 @@ static hashval_t hash_external_ref (const void *p) { const struct external_ref *r = (const struct external_ref *)p; - return htab_hash_pointer (r->type); + dw_die_ref die = r->type; + hashval_t h = 0; + + if (! die->comdat_type_p) + h = htab_hash_string (die->die_id.die_symbol); + else + { + comdat_type_node_ref type_node = die->die_id.die_type_node; + memcpy (&h, type_node->signature, sizeof (h)); + } + return h; } /* Compare external_refs. */