+ ir_node *switchn = info->switchn;
+ ir_graph *irg = get_irn_irg(switchn);
+ dbg_info *dbgi = get_irn_dbg_info(switchn);
+ ir_node *selector = get_Switch_selector(switchn);
+ ir_node *block = get_nodes_block(switchn);
+ ir_node **default_preds = NEW_ARR_F(ir_node*, 0);
+ ir_node *default_block = NULL;
+ ir_node *max_const;
+ ir_node *proj_true;
+ ir_node *proj_false;
+ ir_node *cmp;
+ ir_node *oob_cond;
+ ir_node *in[1];
+ ir_node *new_block;
+ int i;
+ ir_node *proj;
+ size_t n_default_preds;
+
+ assert(tarval_is_null(info->switch_min));
+
+ /* check for out-of-bounds */
+ max_const = new_r_Const(irg, info->switch_max);
+ cmp = new_rd_Cmp(dbgi, block, selector, max_const, ir_relation_less_equal);
+ oob_cond = new_rd_Cond(dbgi, block, cmp);
+ proj_true = new_r_Proj(oob_cond, mode_X, pn_Cond_true);
+ proj_false = new_r_Proj(oob_cond, mode_X, pn_Cond_false);
+
+ ARR_APP1(ir_node*, default_preds, proj_false);
+
+ /* create new block containing the switch */
+ in[0] = proj_true;
+ new_block = new_r_Block(irg, 1, in);
+ set_nodes_block(switchn, new_block);
+
+ /* adjust projs */
+ foreach_out_irn(switchn, i, proj) {
+ long pn = get_Proj_proj(proj);
+ if (pn == pn_Switch_default) {
+ assert(default_block == NULL);
+ default_block = get_irn_out(proj, 0);
+ ARR_APP1(ir_node*, default_preds, proj);
+ }
+ set_nodes_block(proj, new_block);
+ }
+
+ /* adapt default block */
+ n_default_preds = ARR_LEN(default_preds);
+ if (n_default_preds > 1) {
+ /* create new intermediate blocks so we don't have critical edges */
+ size_t p;
+ for (p = 0; p < n_default_preds; ++p) {
+ ir_node *pred = default_preds[p];
+ ir_node *split_block;
+ ir_node *block_in[1];
+
+ block_in[0] = pred;
+ split_block = new_r_Block(irg, 1, block_in);
+
+ default_preds[p] = new_r_Jmp(split_block);
+ }
+ }
+ set_irn_in(default_block, n_default_preds, default_preds);
+
+ DEL_ARR_F(default_preds);
+
+ clear_irg_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_DOMINANCE);
+}
+
+/**
+ * normalize switch to work on an unsigned input with the first case at 0
+ */
+static void normalize_switch(switch_info_t *info, ir_mode *selector_mode)
+{
+ ir_node *switchn = info->switchn;
+ ir_graph *irg = get_irn_irg(switchn);
+ ir_node *block = get_nodes_block(switchn);
+ ir_node *selector = get_Switch_selector(switchn);
+ ir_mode *mode = get_irn_mode(selector);
+ ir_tarval *delta = NULL;
+ bool needs_normalize = false;
+
+ ir_tarval *min = info->switch_min;
+ if (mode_is_signed(mode)) {
+ mode = find_unsigned_mode(mode);
+ selector = new_r_Conv(block, selector, mode);
+ min = tarval_convert_to(min, mode);
+ info->switch_min = min;
+ info->switch_max = tarval_convert_to(info->switch_max, mode);
+ needs_normalize = true;
+ }
+
+ /* normalize so switch_min is at 0 */
+ if (min != get_mode_null(mode)) {
+ ir_node *min_const = new_r_Const(irg, min);
+ dbg_info *dbgi = get_irn_dbg_info(switchn);
+ selector = new_rd_Sub(dbgi, block, selector, min_const, mode);
+
+ info->switch_max = tarval_sub(info->switch_max, min, mode);
+ info->switch_min = get_mode_null(mode);
+ delta = min;
+
+ needs_normalize = true;
+ }
+
+ /* if we have a selector_mode set, then the we will have a switch node,
+ * we have to construct an out-of-bounds check then and after that convert
+ * the switch/selector to the backends desired switch mode */
+ if (selector_mode != NULL) {
+ set_Switch_selector(switchn, selector);
+ create_out_of_bounds_check(info);
+
+ selector = new_r_Conv(block, selector, selector_mode);
+ mode = selector_mode;
+ info->switch_min = tarval_convert_to(info->switch_min, mode);
+ info->switch_max = tarval_convert_to(info->switch_max, mode);
+ if (delta != NULL)
+ delta = tarval_convert_to(delta, mode);
+ needs_normalize = true;
+ }
+
+ if (needs_normalize) {
+ set_Switch_selector(switchn, selector);
+ normalize_table(switchn, mode, delta);
+ }
+}
+
+/**
+ * Create an if (selector == caseval) Cond node (and handle the special case
+ * of ranged cases)
+ */
+static ir_node *create_case_cond(const ir_switch_table_entry *entry,
+ dbg_info *dbgi, ir_node *block,
+ ir_node *selector)
+{
+ ir_graph *irg = get_irn_irg(block);
+ ir_node *minconst = new_r_Const(irg, entry->min);
+ ir_node *cmp;
+
+ if (entry->min == entry->max) {
+ cmp = new_rd_Cmp(dbgi, block, selector, minconst, ir_relation_equal);
+ } else {
+ ir_tarval *adjusted_max = tarval_sub(entry->max, entry->min, NULL);
+ ir_node *sub = new_rd_Sub(dbgi, block, selector, minconst,
+ get_tarval_mode(adjusted_max));
+ ir_node *maxconst = new_r_Const(irg, adjusted_max);
+ cmp = new_rd_Cmp(dbgi, block, sub, maxconst, ir_relation_less_equal);
+ }
+
+ return new_rd_Cond(dbgi, block, cmp);