* tree-ssa-reassoc.c (struct operand_entry): Add new field ID.
(next_operand_entry_id): New static variable.
(sort_by_operand_rank): Stabilize qsort comparator by using unique IDs.
(add_to_ops_vec): Assigned unique ID to operand entry.
(struct oecount_s): New field ID.
(oecount_cmp): Stabilize qsort comparotor by using unique IDs.
(undistribute_ops_list): Assign unique IDs to oecounts.
(init_reassoc): reset next_operand_entry_id.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@158449
138bc75d-0d04-0410-961f-
82ee72b054a4