* basic-block.h (EDGE_FREQUENCY): New macro.

	* bb-reorder (fixup_reorder_chain): Set counts and frequencies
	for new BB/edges.
	* flow.c (find_sub_basic_blocks): Likewise.
	(try_crossjump_to_edge): Likewise; use EDGE_FREQUENCY
	(redirect_edge_and_branch): Use EDGE_FREQUENCY.

	* predict.c (DEF_PREDICTOR): New argument FLAGS.
	(HITRATE): New macro.
	(PRED_FLAG_FIRST_MATCH): New constant.
	(predictor_info): New field flgags.
	(combine_predictions_for_insn): Use DS theory to combine
	probabilities; set the edge probabilities when finished.
	(estimate_probability): Avoid duplicated matches
	of LOOP_BRANCH heuristics for nested loops; update comment.
	* predict.def: Add flags for each prediction, set probabilities
	according to B&L paper.
	* predict.h (DEF_PREDICTOR): New argument FLAGS.

	* profile.c (compute_branch_probabilities):  Cleanup way the edge
	probabilities are computed and REG_BR_PROB notes are dropped; if
	values does not match, emit error.
	(init_branch_prob): Do error instead of warning when profile driven
	feedback is missing or corrupt.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@44439 138bc75d-0d04-0410-961f-82ee72b054a4

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