+2013-06-10 Cary Coutant <ccoutant@google.com>
+
+ * dwarf2out.c (hash_external_ref): Use die_symbol or signature
+ for hash so that hash table traversal order is deterministic.
+
2013-06-10 Michael Meissner <meissner@linux.vnet.ibm.com>
Pat Haugen <pthaugen@us.ibm.com>
Peter Bergner <bergner@vnet.ibm.com>
inline hashval_t
external_ref_hasher::hash (const value_type *r)
{
- return htab_hash_pointer (r->type);
+ dw_die_ref die = r->type;
+ hashval_t h = 0;
+
+ /* We can't use the address of the DIE for hashing, because
+ that will make the order of the stub DIEs non-deterministic. */
+ if (! die->comdat_type_p)
+ /* We have a symbol; use it to compute a hash. */
+ h = htab_hash_string (die->die_id.die_symbol);
+ else
+ {
+ /* We have a type signature; use a subset of the bits as the hash.
+ The 8-byte signature is at least as large as hashval_t. */
+ comdat_type_node_ref type_node = die->die_id.die_type_node;
+ memcpy (&h, type_node->signature, sizeof (h));
+ }
+ return h;
}
inline bool