diff options
Diffstat (limited to 'gcc/flow.c')
| -rw-r--r-- | gcc/flow.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/gcc/flow.c b/gcc/flow.c index 43ea11d8adc..4250ebce563 100644 --- a/gcc/flow.c +++ b/gcc/flow.c @@ -3282,15 +3282,28 @@ add_pred_succ (pred_bb, succ_bb, s_preds, s_succs, num_preds, num_succs) int *num_preds; int *num_succs; { + int_list_ptr tmp; if (succ_bb != EXIT_BLOCK) { - add_int_list_node (&pred_int_list_blocks, &s_preds[succ_bb], pred_bb); - num_preds[succ_bb]++; + for (tmp = s_preds[succ_bb]; tmp; tmp = tmp->next) + if (tmp->val == pred_bb) + break; + if (tmp == NULL) + { + add_int_list_node (&pred_int_list_blocks, &s_preds[succ_bb], pred_bb); + num_preds[succ_bb]++; + } } if (pred_bb != ENTRY_BLOCK) { - add_int_list_node (&pred_int_list_blocks, &s_succs[pred_bb], succ_bb); - num_succs[pred_bb]++; + for (tmp = s_succs[pred_bb]; tmp; tmp = tmp->next) + if (tmp->val == succ_bb) + break; + if (tmp == NULL) + { + add_int_list_node (&pred_int_list_blocks, &s_succs[pred_bb], succ_bb); + num_succs[pred_bb]++; + } } } |