* predict.c (tree_predict_edge): Don't drop useless predictions;

	* predict.c (tree_predict_edge): Don't drop useless predictions;
	check that it is not called too late in the game.
	(gate_estimate_probability): New gate.
	(pass_profile): Gate.
	* tree-mudflap.c (mf_build_check_statement_for): Do not drop
	predictions; update CFG instead.
	* cfgrtl.c (rtl_verify_flow_info): Check that predcitions are consumed.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@100662 138bc75d-0d04-0410-961f-82ee72b054a4