2010-04-16 Doug Kwan <dougkwan@google.com>

2010-04-16  Doug Kwan  <dougkwan@google.com>

	* 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