-static void place_copy_walker(ir_node *block, void *data) {
- belady_env_t *env = data;
- block_info_t *block_info;
- irn_live_t *li;
- ir_node *first, *irn;
- loc_t loc, *starters;
- int i, len, ws_count;
+static loc_t to_take_or_not_to_take(belady_env_t *env, ir_node* first,
+ ir_node *node, ir_node *block,
+ ir_loop *loop)
+{
+ be_next_use_t next_use;
+ loc_t loc;
+ loc.time = USES_INFINITY;
+ loc.irn = node;
+
+ if (!arch_irn_consider_in_reg_alloc(env->arch, env->cls, node)) {
+ loc.time = USES_INFINITY;
+ return loc;
+ }
+
+ /* We have to keep nonspillable nodes in the workingset */
+ if(arch_irn_get_flags(env->arch, node) & arch_irn_flags_dont_spill) {
+ loc.time = 0;
+ DBG((dbg, DBG_START, " %+F taken (dontspill node)\n", node, loc.time));
+ return loc;
+ }
+
+ next_use = be_get_next_use(env->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;
+ DBG((dbg, DBG_START, " %+F not taken (dead)\n", node));
+ return loc;
+ }
+
+ loc.time = next_use.time;