-/**
- * Insert copies for all ia32 nodes where the should_be_same requirement
- * is not fulfilled.
- * Transform Sub into Neg -- Add if IN2 == OUT
- */
-static void ia32_finish_node(ir_node *irn, void *env) {
- ia32_code_gen_t *cg = env;
- const ia32_register_req_t **reqs;
- const arch_register_t *out_reg, *in_reg, *in2_reg;
- int n_res, i;
- ir_node *copy, *in_node, *block, *in2_node;
- ia32_op_type_t op_tp;
-
- if (is_ia32_irn(irn)) {
- /* AM Dest nodes don't produce any values */
- op_tp = get_ia32_op_type(irn);
- if (op_tp == ia32_AddrModeD)
- goto end;
-
- reqs = get_ia32_out_req_all(irn);
- n_res = get_ia32_n_res(irn);
- block = get_nodes_block(irn);
-
- /* check all OUT requirements, if there is a should_be_same */
- if ((op_tp == ia32_Normal || op_tp == ia32_AddrModeS) && need_constraint_copy(irn))
- {
- for (i = 0; i < n_res; i++) {
- if (arch_register_req_is(&(reqs[i]->req), should_be_same)) {
- /* get in and out register */
- out_reg = get_ia32_out_reg(irn, i);
- in_node = get_irn_n(irn, reqs[i]->same_pos);
- in_reg = arch_get_irn_register(cg->arch_env, in_node);
-
- /* don't copy ignore nodes */
- if (arch_irn_is(cg->arch_env, in_node, ignore) && is_Proj(in_node))
- continue;
-
- /* check if in and out register are equal */
- if (! REGS_ARE_EQUAL(out_reg, in_reg)) {
- /* in case of a commutative op: just exchange the in's */
- /* beware: the current op could be everything, so test for ia32 */
- /* commutativity first before getting the second in */
- if (is_ia32_commutative(irn)) {
- in2_node = get_irn_n(irn, reqs[i]->same_pos ^ 1);
- in2_reg = arch_get_irn_register(cg->arch_env, in2_node);
-
- if (REGS_ARE_EQUAL(out_reg, in2_reg)) {
- set_irn_n(irn, reqs[i]->same_pos, in2_node);
- set_irn_n(irn, reqs[i]->same_pos ^ 1, in_node);
- }
- else
- goto insert_copy;
- }
- else {
-insert_copy:
- DBG((cg->mod, LEVEL_1, "inserting copy for %+F in_pos %d\n", irn, reqs[i]->same_pos));
- /* create copy from in register */
- copy = be_new_Copy(arch_register_get_class(in_reg), cg->irg, block, in_node);
-
- DBG_OPT_2ADDRCPY(copy);
-
- /* destination is the out register */
- arch_set_irn_register(cg->arch_env, copy, out_reg);
-
- /* insert copy before the node into the schedule */
- sched_add_before(irn, copy);
-
- /* set copy as in */
- set_irn_n(irn, reqs[i]->same_pos, copy);
- }
- }
- }
- }
- }