2005-12-07 Daniel Berlin <dberlin@dberlin.org>

	* tree-ssa-pre.c (bitmap_set_and): New function.
	(bitmap_set_and_compl): New function.
	(bitmap_set_empty_p): New function.
	(insert_extra_phis): New function.
	(compute_avail): Use insert_extra_phis.




git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@108183 138bc75d-0d04-0410-961f-82ee72b054a4