9977ce841a
register 'type'; now use int/float/long/double throughout to identify registers. Lots of register allocator tweaks and table bugfixes --- we now get through the dreading Mathlib.mod!
103 lines
2 KiB
C
103 lines
2 KiB
C
#include "mcg.h"
|
|
|
|
static PMAPOF(struct vreg, struct vreg) phimap;
|
|
|
|
static void make_phimap(void)
|
|
{
|
|
int i, j;
|
|
|
|
phimap.count = 0;
|
|
for (i=0; i<cfg.preorder.count; i++)
|
|
{
|
|
struct basicblock* bb = cfg.preorder.item[i];
|
|
|
|
for (j=0; j<bb->phis.count; j++)
|
|
{
|
|
struct vreg* vreg = bb->phis.item[j].left;
|
|
struct phi* phi = bb->phis.item[j].right;
|
|
struct vreg* prevvreg = phi->ir->result;
|
|
|
|
pmap_add(&phimap, vreg, prevvreg);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void recursively_associate_group(struct phicongruence* c, struct vreg* vreg)
|
|
{
|
|
int i;
|
|
|
|
vreg->congruence = c;
|
|
array_appendu(&c->vregs, vreg);
|
|
tracef('V', "V: %%%d is a member of congruence group %d\n",
|
|
vreg->id, c->id);
|
|
|
|
if (vreg->defined)
|
|
{
|
|
struct constraint* constraint = pmap_findleft(&vreg->defined->constraints, vreg);
|
|
if (c->type == 0)
|
|
c->type = vreg->type;
|
|
|
|
assert(c->type == vreg->type);
|
|
|
|
array_appendu(&c->definitions, vreg->defined);
|
|
}
|
|
|
|
for (;;)
|
|
{
|
|
struct vreg* child = pmap_findleft(&phimap, vreg);
|
|
if (!child)
|
|
break;
|
|
|
|
pmap_remove(&phimap, vreg, child);
|
|
recursively_associate_group(c, child);
|
|
}
|
|
|
|
for (;;)
|
|
{
|
|
struct vreg* child = pmap_findright(&phimap, vreg);
|
|
if (!child)
|
|
break;
|
|
|
|
pmap_remove(&phimap, child, vreg);
|
|
recursively_associate_group(c, child);
|
|
}
|
|
}
|
|
|
|
static void update_vreg_types(struct phicongruence* c)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; i<c->vregs.count; i++)
|
|
{
|
|
struct vreg* vreg = c->vregs.item[i];
|
|
|
|
if (vreg->type == 0)
|
|
vreg->type = c->type;
|
|
assert(vreg->type == c->type);
|
|
assert(vreg->type != 0);
|
|
}
|
|
}
|
|
|
|
static void associate_groups(void)
|
|
{
|
|
static int number = 0;
|
|
|
|
while (phimap.count > 0)
|
|
{
|
|
struct phicongruence* c = calloc(1, sizeof(*c));
|
|
c->id = number++;
|
|
recursively_associate_group(c, phimap.item[0].left);
|
|
update_vreg_types(c);
|
|
}
|
|
}
|
|
|
|
void pass_find_phi_congruence_groups(void)
|
|
{
|
|
make_phimap();
|
|
associate_groups();
|
|
}
|
|
|
|
/* vim: set sw=4 ts=4 expandtab : */
|
|
|
|
|
|
|