- if(op == op_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 *mode = get_irn_mode(left);
-
- if( (mode_is_int(mode) || mode_is_reference(mode)) &&
- (get_mode_size_bits(mode) < get_mode_size_bits(lowered_mode)
- || classify_Const(right) == CNST_NULL)) {
- int pnc = get_Proj_proj(node);
- int need_not = 0;
- ir_node *a = NULL;
- ir_node *b = NULL;
-
- 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) ^ 1 */
- 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) ^ 1 */
- a = left;
- b = right;
- need_not = 1;
- }
-
- if(a != NULL) {
- tarval *tv = new_tarval_from_long(31, mode_Iu);
- ir_node *shift_cnt = new_d_Const(dbgi, mode_Iu, tv);
-
- if(mode != lowered_mode) {
- a = new_rd_Conv(dbgi, irg, block, a, lowered_mode);
- b = new_rd_Conv(dbgi, irg, block, b, lowered_mode);
- }
-
- res = new_rd_Sub(dbgi, irg, block, a, b, lowered_mode);
- res = new_rd_Shr(dbgi, irg, block, res, shift_cnt,
- lowered_mode);
-
- if(need_not) {
- res = create_not(dbgi, res);
- }
- set_irn_link(node, res);
- return res;
- }
+
+ case iro_Cmp: {
+ ir_node *left = get_Cmp_left(node);
+ ir_node *right = get_Cmp_right(node);
+ ir_mode *cmp_mode = get_irn_mode(left);
+ ir_relation relation = get_Cmp_relation(node);
+
+ 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) && relation != ir_relation_greater))) {
+ int need_not = 0;
+ ir_node *a = NULL;
+ ir_node *b = NULL;
+ int bits;
+ ir_tarval *tv;
+ ir_node *shift_cnt;
+
+ if (relation == ir_relation_less) {
+ /* a < b -> (a - b) >> 31 */
+ a = left;
+ b = right;
+ } else if (relation == ir_relation_less_equal) {
+ /* a <= b -> ~(a - b) >> 31 */
+ a = right;
+ b = left;
+ need_not = 1;
+ } else if (relation == ir_relation_greater) {
+ /* a > b -> (b - a) >> 31 */
+ a = right;
+ b = left;
+ } else if (relation == ir_relation_greater_equal) {
+ /* a >= b -> ~(a - b) >> 31 */
+ a = left;
+ b = right;
+ need_not = 1;
+ } else {
+ goto synth_zero_one;