diff options
Diffstat (limited to 'gcc/predict.c')
| -rw-r--r-- | gcc/predict.c | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/gcc/predict.c b/gcc/predict.c index 60d1a09..790be9f 100644 --- a/gcc/predict.c +++ b/gcc/predict.c @@ -2739,7 +2739,6 @@ tree_estimate_probability_bb (basic_block bb, bool local_only) { edge e; edge_iterator ei; - gimple *last; FOR_EACH_EDGE (e, ei, bb->succs) { @@ -2766,46 +2765,6 @@ tree_estimate_probability_bb (basic_block bb, bool local_only) } } - /* Predict early returns to be probable, as we've already taken - care for error returns and other cases are often used for - fast paths through function. - - Since we've already removed the return statements, we are - looking for CFG like: - - if (conditional) - { - .. - goto return_block - } - some other blocks - return_block: - return_stmt. */ - if (e->dest != bb->next_bb - && e->dest != EXIT_BLOCK_PTR_FOR_FN (cfun) - && single_succ_p (e->dest) - && single_succ_edge (e->dest)->dest == EXIT_BLOCK_PTR_FOR_FN (cfun) - && (last = last_stmt (e->dest)) != NULL - && gimple_code (last) == GIMPLE_RETURN) - { - edge e1; - edge_iterator ei1; - - if (single_succ_p (bb)) - { - FOR_EACH_EDGE (e1, ei1, bb->preds) - if (!predicted_by_p (e1->src, PRED_NULL_RETURN) - && !predicted_by_p (e1->src, PRED_CONST_RETURN) - && !predicted_by_p (e1->src, PRED_NEGATIVE_RETURN)) - predict_edge_def (e1, PRED_TREE_EARLY_RETURN, NOT_TAKEN); - } - else - if (!predicted_by_p (e->src, PRED_NULL_RETURN) - && !predicted_by_p (e->src, PRED_CONST_RETURN) - && !predicted_by_p (e->src, PRED_NEGATIVE_RETURN)) - predict_edge_def (e, PRED_TREE_EARLY_RETURN, NOT_TAKEN); - } - /* Look for block we are guarding (ie we dominate it, but it doesn't postdominate us). */ if (e->dest != EXIT_BLOCK_PTR_FOR_FN (cfun) && e->dest != bb |