diff options
Diffstat (limited to 'gcc/cfganal.c')
| -rw-r--r-- | gcc/cfganal.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/gcc/cfganal.c b/gcc/cfganal.c index 792ea62..394d986 100644 --- a/gcc/cfganal.c +++ b/gcc/cfganal.c @@ -737,23 +737,24 @@ post_order_compute (int *post_order, bool include_entry_exit, basic_block dfs_find_deadend (basic_block bb) { - bitmap visited = BITMAP_ALLOC (NULL); + auto_bitmap visited; + basic_block next = bb; for (;;) { - if (EDGE_COUNT (bb->succs) == 0 - || ! bitmap_set_bit (visited, bb->index)) - { - BITMAP_FREE (visited); - return bb; - } + if (EDGE_COUNT (next->succs) == 0) + return next; + + if (! bitmap_set_bit (visited, next->index)) + return bb; + bb = next; /* If we are in an analyzed cycle make sure to try exiting it. Note this is a heuristic only and expected to work when loop fixup is needed as well. */ if (! bb->loop_father || ! loop_outer (bb->loop_father)) - bb = EDGE_SUCC (bb, 0)->dest; + next = EDGE_SUCC (bb, 0)->dest; else { edge_iterator ei; @@ -761,7 +762,7 @@ dfs_find_deadend (basic_block bb) FOR_EACH_EDGE (e, ei, bb->succs) if (loop_exit_edge_p (bb->loop_father, e)) break; - bb = e ? e->dest : EDGE_SUCC (bb, 0)->dest; + next = e ? e->dest : EDGE_SUCC (bb, 0)->dest; } } |