Bugfix: Set global pointers to NULL after they are freed.

[libfirm] / kaps.c

diff --git a/kaps.c b/kaps.c
index 0b8938d..5776493 100644 (file)
--- a/kaps.c
+++ b/kaps.c
@@ -19,18 +19,21 @@ pbqp_edge *get_edge(pbqp *pbqp, unsigned src_index, unsigned tgt_index)
        int len;
 
        if (tgt_index < src_index) {
-               return get_edge(pbqp, tgt_index, src_index);
+               unsigned tmp = src_index;
+               src_index    = tgt_index;
+               tgt_index    = tmp;
        }
 
        pbqp_node *src_node = get_node(pbqp, src_index);
+       pbqp_node *tgt_node = get_node(pbqp, tgt_index);
        assert(src_node);
-       assert(get_node(pbqp, tgt_index));
+       assert(tgt_node);
 
        len = ARR_LEN(src_node->edges);
 
        for (i = 0; i < len; ++i) {
                pbqp_edge *cur_edge = src_node->edges[i];
-               if (cur_edge->tgt->index == tgt_index) {
+               if (cur_edge->tgt == tgt_node) {
                        return cur_edge;
                }
        }
@@ -77,6 +80,12 @@ void add_edge_costs(pbqp *pbqp, unsigned src_index, unsigned tgt_index,
 {
        pbqp_edge *edge = get_edge(pbqp, src_index, tgt_index);
 
+       if (tgt_index < src_index) {
+               pbqp_matrix_transpose(pbqp, costs);
+               add_edge_costs(pbqp, tgt_index, src_index, costs);
+               return;
+       }
+
        if (edge == NULL) {
                edge = alloc_edge(pbqp, src_index, tgt_index, costs);
        } else {