- ir_node *new_block;
- ir_node *old_block;
- ir_node *phi;
-
- /* Turn off optimizations so that blocks are not merged again. */
- int rem_opt = get_optimize();
- set_optimize(0);
-
- /* Transform the control flow */
- old_block = get_nodes_Block(node);
- new_block = new_Block(get_Block_n_cfgpreds(old_block),
- get_Block_cfgpred_arr(old_block));
- set_irg_current_block(current_ir_graph, new_block);
- {
- ir_node *in[1];
- in[0] = new_Jmp();
- set_irn_in(old_block, 1, in);
- irn_vrfy_irg(old_block, current_ir_graph);
- }
-
- /* move node and its predecessors to new_block */
- move(node, old_block, new_block);
-
- /* move Phi nodes to new_block */
- phi = get_irn_link(old_block);
- set_irn_link(new_block, phi);
- set_irn_link(old_block, NULL);
- while (phi) {
- if(get_nodes_Block(phi) == old_block); /* @@@ inlinening chokes on phis that don't
- obey this condition. How do they get into
- the list??? Example: InterfaceIII */
- set_nodes_Block(phi, new_block);
- phi = get_irn_link(phi);
- }
-
- set_optimize(rem_opt);
+ ir_node *new_block;
+ ir_node *old_block;
+ ir_node *phi;
+
+ /* Turn off optimizations so that blocks are not merged again. */
+ int rem_opt = get_opt_optimize();
+ set_optimize(0);
+
+ /* Transform the control flow */
+ old_block = get_nodes_block(node);
+ new_block = new_Block(get_Block_n_cfgpreds(old_block),
+ get_Block_cfgpred_arr(old_block));
+ set_irg_current_block(current_ir_graph, new_block);
+ {
+ ir_node *jmp = new_Jmp();
+ set_irn_in(old_block, 1, &jmp);
+ irn_vrfy_irg(old_block, current_ir_graph);
+ }
+
+ /* move node and its predecessors to new_block */
+ move(node, old_block, new_block);
+
+ /* move Phi nodes to new_block */
+ phi = get_irn_link(old_block);
+ set_irn_link(new_block, phi);
+ set_irn_link(old_block, NULL);
+ while (phi) {
+ set_nodes_block(phi, new_block);
+ phi = get_irn_link(phi);
+ }
+
+ set_optimize(rem_opt);
+}
+
+/* kill a node by setting its predecessors to Bad and finally exchange the node by Bad itself. */
+void kill_node(ir_node *node) {
+ ir_graph *irg = get_irn_irg(node);
+ ir_node *bad = get_irg_bad(irg);
+ int i;
+
+ for (i = get_irn_arity(node) - 1; i >= -1; --i) {
+ set_irn_n(node, i, bad);
+ }
+ exchange(node, bad);