i >= 0 && (outirn = get_irn_out(irn, i)); --i)
typedef struct walk_env_t {
+ ir_nodeset_t processed;
+ ir_mode *selector_mode;
unsigned spare_size; /**< the allowed spare size for table switches */
unsigned small_switch;
bool changed; /**< indicates whether a change was performed */
- ir_nodeset_t processed;
} walk_env_t;
typedef struct case_data_t {
}
}
+static void create_out_of_bounds_check(switch_info_t *info)
+{
+ 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)
+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 *switch_mode = get_irn_mode(selector);
- ir_mode *mode = switch_mode;
+ ir_mode *mode = get_irn_mode(selector);
ir_tarval *delta = NULL;
bool needs_normalize = false;
mode = find_unsigned_mode(mode);
selector = new_r_Conv(block, selector, mode);
min = tarval_convert_to(min, mode);
- needs_normalize = true;
+ info->switch_min = min;
info->switch_max = tarval_convert_to(info->switch_max, mode);
+ needs_normalize = true;
}
/* normalize so switch_min is at 0 */
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);
}
}
-static void create_out_of_bounds_check(switch_info_t *info)
-{
- 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);
-}
-
/**
* Block-Walker: searches for Switch nodes
*/
if (!lower_switch) {
/* we won't decompose the switch. But we must add an out-of-bounds
* check */
- normalize_switch(&info);
- create_out_of_bounds_check(&info);
+ normalize_switch(&info, env->selector_mode);
return;
}
- normalize_switch(&info);
+ normalize_switch(&info, NULL);
analyse_switch1(&info);
/* Now create the if cascade */
| IR_GRAPH_PROPERTY_CONSISTENT_DOMINANCE);
}
-void lower_switch(ir_graph *irg, unsigned small_switch, unsigned spare_size)
+void lower_switch(ir_graph *irg, unsigned small_switch, unsigned spare_size,
+ ir_mode *selector_mode)
{
+ if (mode_is_signed(selector_mode))
+ panic("expected unsigned mode for switch selector");
+
walk_env_t env;
- env.changed = false;
+ env.selector_mode = selector_mode;
env.spare_size = spare_size;
env.small_switch = small_switch;
+ env.changed = false;
ir_nodeset_init(&env.processed);
remove_critical_cf_edges(irg);
projects / libfirm / blobdiff