diff options
Diffstat (limited to 'gcc/except.c')
| -rw-r--r-- | gcc/except.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/gcc/except.c b/gcc/except.c index a33f3096fbf..68276e0c922 100644 --- a/gcc/except.c +++ b/gcc/except.c @@ -1039,6 +1039,43 @@ get_next_region_sharing_label (int region) return r->next_region_sharing_label->region_number; } +/* Return bitmap of all labels that are handlers of must not throw regions. */ + +bitmap +must_not_throw_labels (void) +{ + struct eh_region *i; + bitmap labels = BITMAP_ALLOC (NULL); + + i = cfun->eh->region_tree; + if (! i) + return labels; + + while (1) + { + if (i->type == ERT_MUST_NOT_THROW && i->tree_label + && LABEL_DECL_UID (i->tree_label) >= 0) + bitmap_set_bit (labels, LABEL_DECL_UID (i->tree_label)); + + /* If there are sub-regions, process them. */ + if (i->inner) + i = i->inner; + /* If there are peers, process them. */ + else if (i->next_peer) + i = i->next_peer; + /* Otherwise, step back up the tree to the next peer. */ + else + { + do { + i = i->outer; + if (i == NULL) + return labels; + } while (i->next_peer == NULL); + i = i->next_peer; + } + } +} + /* Set up EH labels for RTL. */ void |