+ int n, i;
+
+ if(get_irn_visited(curr) >= visited_nr)
+ return 0;
+
+ set_irn_visited(curr, visited_nr);
+ if(get_nodes_block(curr) != bl)
+ return 0;
+
+ if(curr == tgt)
+ return 1;
+
+ for(i = 0, n = get_irn_arity(curr); i < n; ++i) {
+ if(check_dependence(get_irn_n(curr, i), tgt, bl, visited_nr))
+ return 1;
+ }
+
+ return 0;
+}
+
+/**
+ * Check if a node is somehow data dependent on another one.
+ * both nodes must be in the same basic block.
+ * @param n1 The first node.
+ * @param n2 The second node.
+ * @return 1, if n1 is data dependent (transitively) on n2, 0 if not.
+ */
+static int dependent_on(ir_node *n1, ir_node *n2)
+{
+ ir_node *bl = get_nodes_block(n1);
+ ir_graph *irg = get_irn_irg(bl);
+ long vis_nr = get_irg_visited(irg) + 1;
+
+ assert(bl == get_nodes_block(n2));
+ set_irg_visited(irg, vis_nr);
+ return check_dependence(n1, n2, bl, vis_nr);
+}
+
+static int cmp_call_dependecy(const void *c1, const void *c2)
+{
+ ir_node *n1 = *(ir_node **) c1;
+ ir_node *n2 = *(ir_node **) c2;
+
+ /*
+ Classical qsort() comparison function behavior:
+ 0 if both elements are equal
+ 1 if second is "smaller" that first
+ -1 if first is "smaller" that second
+ */
+ return n1 == n2 ? 0 : (dependent_on(n1, n2) ? -1 : 1);
+}
+
+static void link_calls_in_block_walker(ir_node *irn, void *data)
+{
+ if(is_Call(irn)) {
+ be_abi_irg_t *env = data;
+ ir_node *bl = get_nodes_block(irn);
+ void *save = get_irn_link(bl);
+
+ env->call->flags.bits.irg_is_leaf = 0;
+
+ set_irn_link(irn, save);
+ set_irn_link(bl, irn);
+ }
+}
+
+/**
+ * Process all call nodes inside a basic block.
+ * Note that the link field of the block must contain a linked list of all
+ * Call nodes inside the block. We first order this list according to data dependency
+ * and that connect the calls together.
+ */
+static void process_calls_in_block(ir_node *bl, void *data)
+{
+ be_abi_irg_t *env = data;
+ ir_node *curr_sp = env->init_sp;
+ ir_node *irn;
+ int n;
+
+ for(irn = get_irn_link(bl), n = 0; irn; irn = get_irn_link(irn), ++n)
+ obstack_ptr_grow(&env->obst, irn);