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util.c
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util.c
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#include "all.h"
#include <stdarg.h>
typedef struct Bitset Bitset;
typedef struct Vec Vec;
struct Vec {
ulong mag;
size_t esz;
ulong cap;
union {
long long ll;
long double ld;
void *ptr;
} align[];
};
enum {
VMin = 2,
VMag = 0xcabba9e,
NPtr = 256,
};
Typ typ[NTyp];
Ins insb[NIns], *curi;
static void *ptr[NPtr];
static void **pool = ptr;
static int nptr = 1;
void
die_(char *file, char *s, ...)
{
va_list ap;
fprintf(stderr, "%s: dying: ", file);
va_start(ap, s);
vfprintf(stderr, s, ap);
va_end(ap);
fputc('\n', stderr);
abort();
}
void *
emalloc(size_t n)
{
void *p;
p = calloc(1, n);
if (!p)
die("emalloc, out of memory");
return p;
}
void *
alloc(size_t n)
{
void **pp;
if (n == 0)
return 0;
if (nptr >= NPtr) {
pp = emalloc(NPtr * sizeof(void *));
pp[0] = pool;
pool = pp;
nptr = 1;
}
return pool[nptr++] = emalloc(n);
}
void
freeall()
{
void **pp;
for (;;) {
for (pp = &pool[1]; pp < &pool[nptr]; pp++)
free(*pp);
pp = pool[0];
if (!pp)
break;
free(pool);
pool = pp;
nptr = NPtr;
}
nptr = 1;
}
Blk *
blknew()
{
static Blk z;
Blk *b;
b = alloc(sizeof *b);
*b = z;
return b;
}
void
blkdel(Blk *b)
{
Blk *s, **ps, *succ[3];
Phi *p;
uint a;
succ[0] = b->s1;
succ[1] = b->s2 == b->s1 ? 0 : b->s2;
succ[2] = 0;
for (ps=succ; (s=*ps); ps++) {
for (p=s->phi; p; p=p->link) {
for (a=0; p->blk[a]!=b; a++)
assert(a+1<p->narg);
p->narg--;
memmove(&p->blk[a], &p->blk[a+1],
sizeof p->blk[0] * (p->narg-a));
memmove(&p->arg[a], &p->arg[a+1],
sizeof p->arg[0] * (p->narg-a));
}
if (s->npred != 0) {
for (a=0; s->pred[a]!=b; a++)
assert(a+1<s->npred);
s->npred--;
memmove(&s->pred[a], &s->pred[a+1],
sizeof s->pred[0] * (s->npred-a));
}
}
}
void
emit(int op, int k, Ref to, Ref arg0, Ref arg1)
{
if (curi == insb)
die("emit, too many instructions");
*--curi = (Ins){
.op = op, .cls = k,
.to = to, .arg = {arg0, arg1}
};
}
void
emiti(Ins i)
{
emit(i.op, i.cls, i.to, i.arg[0], i.arg[1]);
}
void
idup(Ins **pd, Ins *s, ulong n)
{
*pd = alloc(n * sizeof(Ins));
memcpy(*pd, s, n * sizeof(Ins));
}
Ins *
icpy(Ins *d, Ins *s, ulong n)
{
memcpy(d, s, n * sizeof(Ins));
return d + n;
}
void *
vnew(ulong len, size_t esz)
{
ulong cap;
Vec *v;
for (cap=VMin; cap<len; cap*=2)
;
v = alloc(cap * esz + sizeof(Vec));
v->mag = VMag;
v->cap = cap;
v->esz = esz;
return v + 1;
}
void
vgrow(void *vp, ulong len)
{
Vec *v;
void *v1;
v = *(Vec **)vp - 1;
assert(v+1 && v->mag == VMag);
if (v->cap >= len)
return;
v1 = vnew(len, v->esz);
memcpy(v1, v+1, v->cap * v->esz);
*(Vec **)vp = v1;
}
int
clsmerge(short *pk, short k)
{
short k1;
k1 = *pk;
if (k1 == Kx) {
*pk = k;
return 0;
}
if ((k1 == Kw && k == Kl) || (k1 == Kl && k == Kw)) {
*pk = Kw;
return 0;
}
return k1 != k;
}
int
phicls(int t, Tmp *tmp /*, int c*/)
{
if (tmp[t].phi)
return tmp[t].phi;
return t;
#if 0
int t1;
t1 = tmp[t].phi;
if (!t1)
t1 = t;
if (t != t1) {
t1 = phitmp(t1, tmp, c);
if (c)
tmp[t].phi = t1;
}
return t1;
#endif
}
Ref
newtmp(char *prfx, int k, Fn *fn)
{
static int n;
int t;
t = fn->ntmp++;
vgrow(&fn->tmp, fn->ntmp);
if (prfx)
sprintf(fn->tmp[t].name, "%s.%d", prfx, ++n);
fn->tmp[t].cls = k;
fn->tmp[t].slot = -1;
fn->tmp[t].nuse = +1;
fn->tmp[t].ndef = +1;
return TMP(t);
}
void
chuse(Ref r, int du, Fn *fn)
{
if (rtype(r) == RTmp)
fn->tmp[r.val].nuse += du;
}
Ref
getcon(int64_t val, Fn *fn)
{
int c;
for (c=0; c<fn->ncon; c++)
if (fn->con[c].type == CBits && fn->con[c].bits.i == val)
return CON(c);
vgrow(&fn->con, ++fn->ncon);
fn->con[c] = (Con){.type = CBits, .bits.i = val};
return CON(c);
}
void
addcon(Con *c0, Con *c1)
{
if (c0->type == CUndef)
*c0 = *c1;
else {
if (c1->type == CAddr) {
assert(c0->type != CAddr && "adding two addresses");
c0->type = CAddr;
strcpy(c0->label, c1->label);
}
c0->bits.i += c1->bits.i;
}
}
void
bsinit(BSet *bs, uint n)
{
n = (n + NBit-1) / NBit;
bs->nt = n;
bs->t = alloc(n * sizeof bs->t[0]);
}
MAKESURE(NBit_is_64, NBit == 64);
inline static uint
popcnt(bits b)
{
b = (b & 0x5555555555555555) + ((b>>1) & 0x5555555555555555);
b = (b & 0x3333333333333333) + ((b>>2) & 0x3333333333333333);
b = (b & 0x0f0f0f0f0f0f0f0f) + ((b>>4) & 0x0f0f0f0f0f0f0f0f);
b += (b>>8);
b += (b>>16);
b += (b>>32);
return b & 0xff;
}
uint
bscount(BSet *bs)
{
uint i, n;
n = 0;
for (i=0; i<bs->nt; i++)
n += popcnt(bs->t[i]);
return n;
}
static inline uint
bsmax(BSet *bs)
{
return bs->nt * NBit;
}
void
bsset(BSet *bs, uint elt)
{
assert(elt < bsmax(bs));
bs->t[elt/NBit] |= BIT(elt%NBit);
}
void
bsclr(BSet *bs, uint elt)
{
assert(elt < bsmax(bs));
bs->t[elt/NBit] &= ~BIT(elt%NBit);
}
#define BSOP(f, op) \
void \
f(BSet *a, BSet *b) \
{ \
uint i; \
\
assert(a->nt == b->nt); \
for (i=0; i<a->nt; i++) \
a->t[i] op b->t[i]; \
}
BSOP(bscopy, =)
BSOP(bsunion, |=)
BSOP(bsinter, &=)
BSOP(bsdiff, &= ~)
int
bsequal(BSet *a, BSet *b)
{
uint i;
assert(a->nt == b->nt);
for (i=0; i<a->nt; i++)
if (a->t[i] != b->t[i])
return 0;
return 1;
}
void
bszero(BSet *bs)
{
memset(bs->t, 0, bs->nt * sizeof bs->t[0]);
}
/* iterates on a bitset, use as follows
*
* for (i=0; bsiter(set, &i); i++)
* use(i);
*
*/
int
bsiter(BSet *bs, int *elt)
{
uint i;
for (i=*elt;; i++) {
while (i < bsmax(bs) && !bs->t[i/NBit])
i = (i + NBit) & -NBit;
if (i >= bsmax(bs))
return 0;
if (bshas(bs, i)) {
*elt = i;
return 1;
}
}
}
void
dumpts(BSet *bs, Tmp *tmp, FILE *f)
{
int t;
fprintf(f, "[");
for (t=Tmp0; bsiter(bs, &t); t++)
fprintf(f, " %s", tmp[t].name);
fprintf(f, " ]\n");
}