diff options
Diffstat (limited to 'gcc/predict.c')
| -rw-r--r-- | gcc/predict.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/gcc/predict.c b/gcc/predict.c index 4d01bf3..2a7dbfa 100644 --- a/gcc/predict.c +++ b/gcc/predict.c @@ -3962,15 +3962,26 @@ force_edge_cold (edge e, bool impossible) e2->count.apply_scale (count_sum2, count_sum); e2->probability /= prob_comp; } - if (current_ir_type () != IR_GIMPLE) + if (current_ir_type () != IR_GIMPLE + && e->src != ENTRY_BLOCK_PTR_FOR_FN (cfun)) update_br_prob_note (e->src); } /* If all edges out of e->src are unlikely, the basic block itself is unlikely. */ else { - e->probability = profile_probability::always (); - if (current_ir_type () != IR_GIMPLE) + if (prob_sum == profile_probability::never ()) + e->probability = profile_probability::always (); + else + { + if (impossible) + e->probability = profile_probability::never (); + /* If BB has some edges out that are not impossible, we can not + assume that BB itself is. */ + impossible = false; + } + if (current_ir_type () != IR_GIMPLE + && e->src != ENTRY_BLOCK_PTR_FOR_FN (cfun)) update_br_prob_note (e->src); if (e->src->count == profile_count::zero ()) return; |