diff options
Diffstat (limited to 'gcc/tree-ssa-loop-manip.cc')
| -rw-r--r-- | gcc/tree-ssa-loop-manip.cc | 30 |
1 files changed, 6 insertions, 24 deletions
diff --git a/gcc/tree-ssa-loop-manip.cc b/gcc/tree-ssa-loop-manip.cc index e58892e..e743691 100644 --- a/gcc/tree-ssa-loop-manip.cc +++ b/gcc/tree-ssa-loop-manip.cc @@ -1040,29 +1040,6 @@ determine_exit_conditions (class loop *loop, class tree_niter_desc *desc, *exit_bound = bound; } -/* Updat NEW_EXIT probability after loop has been unrolled. */ - -void -update_exit_probability_after_unrolling (class loop *loop, edge new_exit) -{ - /* gimple_duplicate_loop_body_to_header_edge depending on - DLTHE_FLAG_UPDATE_FREQ either keeps original frequency of the loop header - or scales it down accordingly. - However exit edge probability is kept as original. Fix it if needed - and compensate. */ - profile_probability new_prob - = loop_preheader_edge - (loop)->count ().probability_in (new_exit->src->count); - if (!(new_prob == new_exit->probability)) - { - profile_count old_count = new_exit->src->count - new_exit->count (); - set_edge_probability_and_rescale_others (new_exit, new_prob); - profile_count new_count = new_exit->src->count - new_exit->count (); - scale_dominated_blocks_in_loop (loop, new_exit->src, - new_count, old_count); - } -} - /* Unroll LOOP FACTOR times. LOOP is known to have a single exit edge whose source block dominates the latch. DESC describes the number of iterations of LOOP. @@ -1289,7 +1266,12 @@ tree_transform_and_unroll_loop (class loop *loop, unsigned factor, update_ssa (TODO_update_ssa); new_exit = single_dom_exit (loop); - update_exit_probability_after_unrolling (loop, new_exit); + /* gimple_duplicate_loop_body_to_header_edge depending on + DLTHE_FLAG_UPDATE_FREQ either keeps original frequency of the loop header + or scales it down accordingly. + However exit edge probability is kept as original. Fix it if needed + and compensate. */ + update_loop_exit_probability_scale_dom_bbs (loop, new_exit); if (!single_loop_p) { /* Finally create the new counter for number of iterations and add |