diff options
Diffstat (limited to 'gcc/sched-rgn.c')
| -rw-r--r-- | gcc/sched-rgn.c | 15 |
1 files changed, 4 insertions, 11 deletions
diff --git a/gcc/sched-rgn.c b/gcc/sched-rgn.c index 38635522e47..570abacc20b 100644 --- a/gcc/sched-rgn.c +++ b/gcc/sched-rgn.c @@ -2909,17 +2909,10 @@ init_regions () dominance_info dom; struct edge_list *edge_list; - /* The scheduler runs after flow; therefore, we can't blindly call - back into find_basic_blocks since doing so could invalidate the - info in global_live_at_start. - - Consider a block consisting entirely of dead stores; after life - analysis it would be a block of NOTE_INSN_DELETED notes. If - we call find_basic_blocks again, then the block would be removed - entirely and invalidate our the register live information. - - We could (should?) recompute register live information. Doing - so may even be beneficial. */ + /* The scheduler runs after estimate_probabilities; therefore, we + can't blindly call back into find_basic_blocks since doing so + could invalidate the branch probability info. We could, + however, call cleanup_cfg. */ edge_list = create_edge_list (); /* Compute the dominators and post dominators. */ |