- case iro_Conv: {
- ir_node *pred = get_Conv_op(node);
- ir_mode *mode = get_irn_mode(pred);
- ir_tarval *tv_zeroc = get_mode_null(mode);
- ir_node *zero_cmp = new_rd_Const(dbgi, irg, tv_zeroc);
-
- ir_node *cmp = new_rd_Cmp(dbgi, block, pred, zero_cmp);
- ir_node *proj = new_rd_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
- res = config->create_set(proj);
- break;
- }
-
- case iro_Proj: {
- ir_node *pred = get_Proj_pred(node);
-
- if (is_Cmp(pred)) {
- ir_node *left = get_Cmp_left(pred);
- ir_node *right = get_Cmp_right(pred);
- ir_mode *cmp_mode = get_irn_mode(left);
-
- if ((mode_is_int(cmp_mode) || mode_is_reference(cmp_mode)) &&
- (get_mode_size_bits(cmp_mode) < get_mode_size_bits(mode) ||
- (mode_is_signed(cmp_mode) && is_Const(right) && is_Const_null(right)))) {
- int pnc = get_Proj_proj(node);
- int need_not = 0;
- ir_node *a = NULL;
- ir_node *b = NULL;
- int bits;
- ir_tarval *tv;
- ir_node *shift_cnt;
-
- if (pnc == pn_Cmp_Lt) {
- /* a < b -> (a - b) >> 31 */
- a = left;
- b = right;
- } else if (pnc == pn_Cmp_Le) {
- /* a <= b -> ~(a - b) >> 31 */
- a = right;
- b = left;
- need_not = 1;
- } else if (pnc == pn_Cmp_Gt) {
- /* a > b -> (b - a) >> 31 */
- a = right;
- b = left;
- } else if (pnc == pn_Cmp_Ge) {
- /* a >= b -> ~(a - b) >> 31 */
- a = left;
- b = right;
- need_not = 1;
- } else {
- goto synth_zero_one;
- }
-
- bits = get_mode_size_bits(mode);
- tv = new_tarval_from_long(bits-1, mode_Iu);
- shift_cnt = new_rd_Const(dbgi, irg, tv);
-
- if (cmp_mode != mode) {
- a = new_rd_Conv(dbgi, block, a, mode);
- b = new_rd_Conv(dbgi, block, b, mode);
- }
-
- res = new_rd_Sub(dbgi, block, a, b, mode);
- if (need_not) {
- res = new_rd_Not(dbgi, block, res, mode);
- }
- res = new_rd_Shr(dbgi, block, res, shift_cnt, mode);
- } else {
- /* synthesize the 0/1 value */
-synth_zero_one:
- res = config->create_set(node);
- }
- } else if (is_Proj(pred) && is_Call(get_Proj_pred(pred))) {
- ir_type *type = get_Call_type(get_Proj_pred(pred));
- adjust_method_type(type);
- set_irn_mode(node, mode);
- res = node;
- goto own_replacement;
- } else if (is_Proj(pred) && is_Start(get_Proj_pred(pred))) {
- ir_graph *irg = get_irn_irg(node);
- ir_entity *entity = get_irg_entity(irg);
- ir_type *type = get_entity_type(entity);
- adjust_method_type(type);
- set_irn_mode(node, mode);
- res = node;
- goto own_replacement;
- } else {
- panic("unexpected projb: %+F (pred: %+F)", node, pred);
- }