Commit 3d4caa92 by Matthias Braun

### irdom: do not count bad predecessors as control flow

parent d304e6e0
 ... ... @@ -678,25 +678,28 @@ void compute_doms(ir_graph *irg) for (i = n_blocks-1; i > 0; i--) { /* Don't iterate the root, it's done. */ int irn_arity; tmp_dom_info *w = &tdi_list[i]; tmp_dom_info *w = &tdi_list[i]; ir_node *block = w->block; tmp_dom_info *v; int irn_arity; /* Step 2 */ irn_arity = get_irn_arity(w->block); irn_arity = get_irn_arity(block); for (j = 0; j < irn_arity; j++) { ir_node *pred = get_Block_cfgpred_block(w->block, j); ir_node *pred = get_Block_cfgpred(block, j); ir_node *pred_block = get_nodes_block(pred); tmp_dom_info *u; if (is_Bad(pred) || (get_Block_dom_pre_num (pred) == -1)) continue; /* control-dead */ if (is_Bad(pred) || (get_Block_dom_pre_num (pred_block) == -1)) continue; /* unreachable */ u = dom_eval (&tdi_list[get_Block_dom_pre_num(pred)]); if (u->semi < w->semi) w->semi = u->semi; u = dom_eval (&tdi_list[get_Block_dom_pre_num(pred_block)]); if (u->semi < w->semi) w->semi = u->semi; } /* handle keep-alives if we are at the end block */ if (w->block == get_irg_end_block(irg)) { if (block == get_irg_end_block(irg)) { ir_node *end = get_irg_end(irg); irn_arity = get_irn_arity(end); ... ... @@ -705,10 +708,11 @@ void compute_doms(ir_graph *irg) tmp_dom_info *u; if (!is_Block(pred) || get_Block_dom_pre_num(pred) == -1) continue; /* control-dead */ continue; /* unreachable */ u = dom_eval (&tdi_list[get_Block_dom_pre_num(pred)]); if (u->semi < w->semi) w->semi = u->semi; if (u->semi < w->semi) w->semi = u->semi; } } ... ... @@ -745,7 +749,8 @@ void compute_doms(ir_graph *irg) if (! w->dom) continue; /* control dead */ if (w->dom != w->semi) w->dom = w->dom->dom; if (w->dom != w->semi) w->dom = w->dom->dom; set_Block_idom(w->block, w->dom->block); /* blocks dominated by dead one's are still dead */ ... ... @@ -762,7 +767,7 @@ void compute_doms(ir_graph *irg) { unsigned tree_pre_order = 0; dom_tree_walk_irg(irg, assign_tree_dom_pre_order, assign_tree_dom_pre_order_max, &tree_pre_order); assign_tree_dom_pre_order_max, &tree_pre_order); } current_ir_graph = rem; } ... ...
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