-static void adjust_phi_arguments(be_chordal_env_t *chordal_env, ir_node *phi) {
- int i, max;
- ir_node *arg, *phi_block, *arg_block;
- const arch_register_t *phi_reg, *arg_reg;
- const arch_register_class_t *cls;
-
- assert(is_Phi(phi) && "Can only handle phi-destruction :)");
-
- phi_block = get_nodes_block(phi);
- phi_reg = get_reg(phi);
- cls = arch_get_irn_reg_class(get_chordal_arch(chordal_env), phi, -1);
-
- /* process all arguments of the phi */
- for(i=0, max=get_irn_arity(phi); i<max; ++i) {
- arg = get_irn_n(phi, i);
- arg_block = get_Block_cfgpred_block(phi_block, i);
- arg_reg = get_reg(arg);
- assert(arg_reg && "Register must be set while placing perms");
-
- DBG((dbg, LEVEL_1, " for %+F(%s) -- %+F(%s)\n", phi, phi_reg->name, arg, arg_reg->name));
-
- if(nodes_interfere(chordal_env, phi, arg)) {
- /* Insert a duplicate in arguments block,
- * make it the new phi arg,
- * set its register,
- * insert it into schedule,
- * pin it
- */
- ir_node *dupl = new_Copy(chordal_env->main_env->node_factory, cls, chordal_env->irg, arg_block, arg);
- assert(get_irn_mode(phi) == get_irn_mode(dupl));
- set_irn_n(phi, i, dupl);
- set_reg(dupl, phi_reg);
- sched_add_after(sched_skip(sched_last(arg_block), 0, sched_skip_cf_predicator, chordal_env->main_env->arch_env), dupl);
- pin_irn(dupl, phi_block);
- DBG((dbg, LEVEL_1, " they do interfere: insert %+F(%s)\n", dupl, get_reg(dupl)->name));
- } else {
- /*
- * First check if there is a phi
- * - in the same block
- * - having arg at the current pos in its arg-list
- * - having the same color as arg
- *
- * If found, then pin the arg
- */
- DBG((dbg, LEVEL_1, " they do not interfere\n"));
- assert(is_Proj(arg));
- if (!is_pinned(arg)) {
- ir_node *other_phi;
- DBG((dbg, LEVEL_1, " searching for phi with same arg having args register\n"));
- for(other_phi = get_irn_link(phi_block); other_phi; other_phi = get_irn_link(other_phi)) {
- assert(is_Phi(other_phi) && get_nodes_block(phi) == get_nodes_block(other_phi) && "link fields are screwed up");
- if (get_irn_n(other_phi, i) == arg && get_reg(other_phi) == arg_reg) {
- DBG((dbg, LEVEL_1, " found %+F(%s)\n", other_phi, get_reg(other_phi)->name));
- pin_irn(arg, phi_block);
- }
- }
- }