* basic-block.h (RDIV): Define.
(EDGE_FREQUENCY): Simplify.
(check_probability, combine_probabilities, apply_probability,
inverse_probability): New.
* cfgloop.c (scale_loop_profile): New function.
* cfgloop.h (scale_loop_profile): Declare.
(slpeel_add_loop_guard): Add probability parameter.
(set_prologue_iterations): Add probability parameter.
(slpeel_tree_peel_loop_to_edge): Add bound1 and bound2 parameters;
update probabilities correctly.
(vect_do_peeling_for_alignment, vect_gen_niters_for_prolog_loop): New.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@191839 138bc75d-0d04-0410-961f-82ee72b054a4