96 lines
1.5 KiB
C
96 lines
1.5 KiB
C
#include "mcg.h"
|
|
|
|
static ARRAYOF(struct ir) allirs;
|
|
static ARRAYOF(struct ir) rootirs;
|
|
|
|
static void addall(struct ir* ir)
|
|
{
|
|
if (array_appendu(&allirs, ir))
|
|
return;
|
|
|
|
if (ir->left)
|
|
addall(ir->left);
|
|
if (ir->right)
|
|
addall(ir->right);
|
|
}
|
|
|
|
static void collect_irs(void)
|
|
{
|
|
int i;
|
|
|
|
allirs.count = rootirs.count = 0;
|
|
for (i=0; i<current_proc->blocks.count; i++)
|
|
{
|
|
struct basicblock* bb = current_proc->blocks.item[i];
|
|
int j;
|
|
|
|
for (j=0; j<bb->irs.count; j++)
|
|
{
|
|
struct ir* ir = bb->irs.item[j];
|
|
addall(ir);
|
|
array_append(&rootirs, ir);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void clear_roots(void)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; i<allirs.count; i++)
|
|
{
|
|
struct ir* ir = allirs.item[i];
|
|
ir->root = NULL;
|
|
}
|
|
}
|
|
|
|
static void find_roots(void)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; i<rootirs.count; i++)
|
|
{
|
|
struct ir* ir = rootirs.item[i];
|
|
assert(!ir->root);
|
|
ir->root = ir;
|
|
}
|
|
}
|
|
|
|
static void recursively_mark_root(struct ir* node, struct ir* root)
|
|
{
|
|
if (node != root)
|
|
{
|
|
if (node->root)
|
|
return;
|
|
node->root = root;
|
|
}
|
|
|
|
if (node->left)
|
|
recursively_mark_root(node->left, root);
|
|
if (node->right)
|
|
recursively_mark_root(node->right, root);
|
|
}
|
|
|
|
static void find_non_roots(void)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; i<rootirs.count; i++)
|
|
{
|
|
struct ir* ir = rootirs.item[i];
|
|
recursively_mark_root(ir, ir);
|
|
}
|
|
}
|
|
|
|
void pass_group_irs(void)
|
|
{
|
|
collect_irs();
|
|
clear_roots();
|
|
find_roots();
|
|
find_non_roots();
|
|
}
|
|
|
|
/* vim: set sw=4 ts=4 expandtab : */
|
|
|
|
|