* @version $Id$
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
#include <limits.h>
+#include "array_t.h"
#include "ircons.h"
#include "irgopt.h"
#include "irgwalk.h"
unsigned long spare, num_cases = 0;
/* TODO: Minimum size for jump table? */
- if(get_irn_n_outs(cond) <= 4)
+ if (get_irn_n_outs(cond) <= 4)
return 0;
default_pn = get_Cond_defaultProj(cond);
foreach_out_irn(cond, i, proj) {
long pn = get_Proj_proj(proj);
- if(pn == default_pn)
+ if (pn == default_pn)
continue;
- if(pn < switch_min)
+ if (pn < switch_min)
switch_min = pn;
- if(pn > switch_max)
+ if (pn > switch_max)
switch_max = pn;
- num_cases++;
+ ++num_cases;
}
/*
static int casecmp(const void *a, const void *b)
{
- return ((case_data_t *) a)->value - ((case_data_t *) b)->value;
+ const case_data_t *cda = a;
+ const case_data_t *cdb = b;
+ return (cda->value > cdb->value) - (cda->value < cdb->value);
}
/**
static void create_if_cascade(ifcas_env_t *env, ir_node *curblock,
case_data_t *curcases, int numcases)
{
+ assert(numcases >= 0);
+
set_cur_block(curblock);
- if(numcases == 1)
- {
+ if (numcases == 0) {
+ /* zero cases: "goto default;" */
+ env->defusers[env->defindex++] = new_Jmp();
+ } else if (numcases == 1) {
/* only one case: "if(sel == val) goto target else goto default;" */
ir_node *val = new_Const_long(get_irn_mode(env->sel), curcases[0].value);
ir_node *cmp = new_Cmp(env->sel, val);
ir_node *cond = new_Cond(proj);
set_Block_cfgpred(curcases[0].target, 0, new_Proj(cond, mode_X, pn_Cond_true));
env->defusers[env->defindex++] = new_Proj(cond, mode_X, pn_Cond_false);
- } else if(numcases == 2) {
+ } else if (numcases == 2) {
/* only two cases: "if(sel == val[0]) goto target[0];" */
ir_node *val = new_Const_long(get_irn_mode(env->sel), curcases[0].value);
ir_node *cmp = new_Cmp(env->sel, val);
set_Block_cfgpred(curcases[0].target, 0, new_Proj(cond, mode_X, pn_Cond_true));
in[0] = new_Proj(cond, mode_X, pn_Cond_false);
neblock = new_Block(1, in);
+ set_cur_block(neblock);
/* second part: "else if(sel == val[1]) goto target[1] else goto default;" */
val = new_Const_long(get_irn_mode(env->sel), curcases[1].value);
set_cur_block(curblock);
in[0] = new_Proj(cond, mode_X, pn_Cond_false);
geblock = new_Block(1, in);
+ set_cur_block(geblock);
create_if_cascade(env, ltblock, curcases, midcase);
create_if_cascade(env, geblock, curcases + midcase, numcases - midcase);
ir_node *defblock = NULL;
ifcas_env_t ifcas_env;
- if(get_Block_n_cfgpreds(block) != 1)
+ if (get_Block_n_cfgpreds(block) != 1)
return;
projx = get_Block_cfgpred(block, 0);
- if(!is_Proj(projx))
+ if (!is_Proj(projx))
return;
assert(get_irn_mode(projx) == mode_X);
cond = get_Proj_pred(projx);
- if(!is_Cond(cond))
+ if (!is_Cond(cond))
return;
sel = get_Cond_selector(cond);
sel_mode = get_irn_mode(sel);
- if(sel_mode == mode_b) /* not a switch? */
+ if (sel_mode == mode_b) /* not a switch? */
return;
- if(should_do_table_switch(cond, env->spare_size))
+ if (should_do_table_switch(cond, env->spare_size))
return;
/*
* Switch should be transformed into an if cascade.
* So first order the cases, so we can do a binary search on them.
*/
+ env->changed = 1;
numcases = get_irn_n_outs(cond) - 1; // does not contain default case
NEW_ARR_A(case_data_t, cases, numcases);
ir_node *target = get_irn_out(proj, 0);
assert(get_Block_n_cfgpreds(target) == 1 && "Encountered critical edge in switch");
- if(pn == default_pn)
- {
+ if (pn == default_pn) {
defblock = target;
continue;
}
current_ir_graph = irg;
+ env.changed = 0;
env.spare_size = spare_size;
remove_critical_cf_edges(irg);
irg_block_walk_graph(irg, find_cond_nodes, NULL, &env);
- if(env.changed) {
+ if (env.changed) {
/* control flow changed */
set_irg_outs_inconsistent(irg);
set_irg_doms_inconsistent(irg);
set_irg_extblk_inconsistent(irg);
set_irg_loopinfo_inconsistent(irg);
}
-
current_ir_graph = rem;
}