+ loc.time = USES_INFINITY;
+ loc.node = node;
+ //loc.reloaded = rand() % 2; /* provoke a bug... */
+ loc.reloaded = 0;
+
+ if (!arch_irn_consider_in_reg_alloc(arch_env, cls, node)) {
+ loc.time = USES_INFINITY;
+ return loc;
+ }
+
+ /* We have to keep nonspillable nodes in the workingset */
+ if(arch_irn_get_flags(arch_env, node) & arch_irn_flags_dont_spill) {
+ loc.time = 0;
+ DB((dbg, DBG_START, " %+F taken (dontspill node)\n", node, loc.time));
+ return loc;
+ }
+
+ next_use = be_get_next_use(uses, first, 0, node, 0);
+ if(USES_IS_INFINITE(next_use.time)) {
+ // the nodes marked as live in shouldn't be dead, so it must be a phi
+ assert(is_Phi(node));
+ loc.time = USES_INFINITY;
+ DB((dbg, DBG_START, " %+F not taken (dead)\n", node));
+ if(is_Phi(node)) {
+ be_spill_phi(senv, node);
+ }
+ return loc;
+ }
+
+ loc.time = next_use.time;
+
+ if(next_use.outermost_loop >= get_loop_depth(loop)) {
+ DB((dbg, DBG_START, " %+F taken (%u, loop %d)\n", node, loc.time, next_use.outermost_loop));
+ } else {
+ loc.time = USES_PENDING;
+ DB((dbg, DBG_START, " %+F delayed (outerloopdepth %d < loopdetph %d)\n", node, next_use.outermost_loop, get_loop_depth(loop)));
+ }
+ return loc;
+}
+
+/**
+ * Computes the start-workset for a block with multiple predecessors. We assume
+ * that at least 1 of the predeccesors is a back-edge which means we're at the
+ * beginning of a loop. We try to reload as much values as possible now so they
+ * don't get reloaded inside the loop.
+ */
+static void compute_live_ins(const ir_node *block)
+{
+ ir_loop *loop = get_irn_loop(block);
+ ir_node *first;
+ ir_node *node;
+ loc_t loc;
+ loc_t *starters;
+ loc_t *delayed;
+ int i, len, ws_count;
+ int free_slots, free_pressure_slots;
+ unsigned pressure;
+ //int arity;
+ //int n_pred_worksets;
+ //workset_t **pred_worksets;