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/*% rm -f rega.o main.o && cc -g -std=c99 -Wall -DTEST_PMOV -o pmov % *.o
*
* This is a test framwork for the dopm() function
* in rega.c, use it when you want to modify it or
* all the parallel move functions.
*
* You might need to decrease NIReg to see it
* terminate, I used NIReg == 7 at most.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static void assert_test(char *, int), fail(void), iexec(int *);
#include "../../rega.c"
static void bsinit_(BSet *, uint);
static RMap mbeg;
static Ins ins[NIReg], *ip;
static Blk dummyb = { .ins = ins };
int
main()
{
Ins *i1;
unsigned long long tm, rm, cnt;
RMap mend;
int reg[NIReg], val[NIReg+1];
int t, i, r, nr;
tmp = (Tmp[Tmp0+NIReg]){{{0}}};
for (t=0; t<Tmp0+NIReg; t++)
if (t >= Tmp0) {
tmp[t].cls = Kw;
tmp[t].hint.r = -1;
tmp[t].hint.m = 0;
tmp[t].slot = -1;
sprintf(tmp[t].name, "tmp%d", t-Tmp0+1);
}
bsinit_(mbeg.b, Tmp0+NIReg);
bsinit_(mend.b, Tmp0+NIReg);
cnt = 0;
for (tm = 0; tm < 1ull << (2*NIReg); tm++) {
mbeg.n = 0;
bszero(mbeg.b);
ip = ins;
/* find what temporaries are in copy and
* wether or not they are in register
*/
for (t=0; t<NIReg; t++)
switch ((tm >> (2*t)) & 3) {
case 0:
/* not in copy, not in reg */
break;
case 1:
/* not in copy, in reg */
radd(&mbeg, Tmp0+t, t+1);
break;
case 2:
/* in copy, not in reg */
*ip++ = (Ins){OCopy, TMP(Tmp0+t), {R, R}, Kw};
break;
case 3:
/* in copy, in reg */
*ip++ = (Ins){OCopy, TMP(Tmp0+t), {R, R}, Kw};
radd(&mbeg, Tmp0+t, t+1);
break;
}
if (ip == ins)
/* cancel if the parallel move
* is empty
*/
goto Nxt;
/* find registers for temporaries
* in mbeg
*/
nr = ip - ins;
rm = (1ull << (nr+1)) - 1;
for (i=0; i<nr; i++)
reg[i] = i+1;
for (;;) {
/* set registers on copies
*/
for (i=0, i1=ins; i1<ip; i1++, i++)
i1->arg[0] = TMP(reg[i]);
/* compile the parallel move
*/
rcopy(&mend, &mbeg);
dopm(&dummyb, ip-1, &mend);
cnt++;
/* check that mend contain mappings for
* source registers and does not map any
* assigned temporary, then check that
* all temporaries in mend are mapped in
* mbeg and not used in the copy
*/
for (i1=ins; i1<ip; i1++) {
r = i1->arg[0].val;
assert(rfree(&mend, r) == r);
t = i1->to.val;
assert(!bshas(mend.b, t));
}
for (i=0; i<mend.n; i++) {
t = mend.t[i];
assert(bshas(mbeg.b, t));
t -= Tmp0;
assert(((tm >> (2*t)) & 3) == 1);
}
/* execute the code generated and check
* that all assigned temporaries got their
* value, and that all live variables's
* content got preserved
*/
for (i=1; i<=NIReg; i++)
val[i] = i;
iexec(val);
for (i1=ins; i1<ip; i1++) {
t = i1->to.val;
r = rfind(&mbeg, t);
if (r != -1)
assert(val[r] == i1->arg[0].val);
}
for (i=0; i<mend.n; i++) {
t = mend.t[i];
r = mend.r[i];
assert(val[t-Tmp0+1] == r);
}
/* find the next register assignment */
i = nr - 1;
for (;;) {
r = reg[i];
rm &= ~(1ull<<r);
do
r++;
while (r <= NIReg && (rm & (1ull<<r)));
if (r == NIReg+1) {
if (i == 0)
goto Nxt;
i--;
} else {
rm |= (1ull<<r);
reg[i++] = r;
break;
}
}
for (; i<nr; i++)
for (r=1; r<=NIReg; r++)
if (!(rm & (1ull<<r))) {
rm |= (1ull<<r);
reg[i] = r;
break;
}
}
Nxt: freeall();
}
printf("%llu tests successful!\n", cnt);
exit(0);
}
/* execute what pmgen() wrote (swap, copy) */
#define validr(r) \
rtype(r) == RTmp && \
r.val > 0 && \
r.val <= NIReg
static void
iexec(int val[])
{
Ins *i;
int t;
for (i=insb; i<curi; i++)
switch (i->op) {
default:
assert(!"iexec: missing case\n");
exit(1);
case OSwap:
assert(validr(i->arg[0]));
assert(validr(i->arg[1]));
t = val[i->arg[0].val];
val[i->arg[0].val] = val[i->arg[1].val];
val[i->arg[1].val] = t;
break;
case OCopy:
assert(validr(i->to));
assert(validr(i->arg[0]));
val[i->to.val] = val[i->arg[0].val];
break;
}
}
/* failure diagnostics */
static int re;
static void
replay()
{
RMap mend;
re = 1;
bsinit_(mend.b, Tmp0+NIReg);
rcopy(&mend, &mbeg);
dopm(&dummyb, ip-1, &mend);
}
static void
fail()
{
Ins *i1;
int i;
printf("\nIn registers: ");
for (i=0; i<mbeg.n; i++)
printf("%s(r%d) ",
tmp[mbeg.t[i]].name,
mbeg.r[i]);
printf("\n");
printf("Parallel move:\n");
for (i1=ins; i1<ip; i1++)
printf("\t %s <- r%d\n",
tmp[i1->to.val].name,
i1->arg[0].val);
replay();
abort();
}
static void
assert_test(char *s, int x)
{
if (x)
return;
if (re)
abort();
printf("!assertion failure: %s\n", s);
fail();
}
static void
bsinit_(BSet *bs, uint n)
{
n = (n + NBit-1) / NBit;
bs->nt = n;
bs->t = emalloc(n * sizeof bs->t[0]);
}
/* symbols required by the linker */
char debug['Z'+1];
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