- DB((dbg, DBG_START, " delayed %+F taken\n", delayed[i].node));
- ARR_APP1(loc_t, starters, delayed[i]);
- delayed[i].node = NULL;
+ int p, arity;
+ loc_t *loc = & delayed[i];
+
+ /* don't use values which are dead in a known predecessors
+ * to not induce unnecessary reloads */
+ arity = get_irn_arity(block);
+ for (p = 0; p < arity; ++p) {
+ ir_node *pred_block = get_Block_cfgpred_block(block, p);
+ block_info_t *pred_info = get_block_info(pred_block);
+
+ if (pred_info == NULL)
+ continue;
+
+ if (!workset_contains(pred_info->end_workset, loc->node)) {
+ DB((dbg, DBG_START,
+ " delayed %+F not live at pred %+F\n", loc->node,
+ pred_block));
+ goto skip_delayed;
+ }
+ }
+
+ DB((dbg, DBG_START, " delayed %+F taken\n", loc->node));
+ ARR_APP1(loc_t, starters, *loc);
+ loc->node = NULL;
+ skip_delayed:
+ ;