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fix my sloppy understanding of x86 assembly!

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This commit is contained in:
Quentin Carbonneaux 2015-08-11 13:40:54 -04:00
parent 03785fbc9a
commit ec5042148e
2 changed files with 30 additions and 38 deletions
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21
lisc/isel.c
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@ -115,34 +115,15 @@ sel(Ins i, Fn *fn)
case OAdd:
case OSub:
case OCopy:
emit(i.op, i.to, i.arg[0], i.arg[1]);
break;
case OStore:
case OStoreb:
case OStores:
r0 = i.arg[0];
goto Load;
case OLoad:
case OLoadss:
case OLoadus:
case OLoadsb:
case OLoadub:
r0 = i.arg[0];
if (rtype(r0) == RCon) {
t = newtmp(TLong, fn);
r0 = TMP(t);
}
Load:
r1 = i.arg[1];
if (rtype(r1) == RCon) {
t = newtmp(TLong, fn);
r1 = TMP(t);
}
emit(i.op, i.to, r0, r1);
if (!req(r0, i.arg[0]))
emit(OCopy, r0, i.arg[0], R);
if (!req(r1, i.arg[1]))
emit(OCopy, r1, i.arg[1], R);
emit(i.op, i.to, i.arg[0], i.arg[1]);
break;
case ONop:
break;