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simplify rega's dopm()

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This commit is contained in:
Quentin Carbonneaux 2015-08-22 10:18:40 -04:00
parent 762fb723e5
commit 1eb8758824
1 changed files with 6 additions and 14 deletions
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20
lisc/rega.c
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@ -202,7 +202,7 @@ pmgen()
free(status);
}
static int
int
isreg(Ref r)
{
return rtype(r) == RTmp && r.val < Tmp0;
@ -212,8 +212,8 @@ static Ins *
dopm(Blk *b, Ins *i, RMap *m)
{
RMap m0;
int n, r, r1, t, nins;
Ins *i1, *ib, *ip, *ir;
int n, r, r1, t;
Ins *i1, *ip;
m0 = *m;
i1 = i+1;
@ -251,22 +251,14 @@ dopm(Blk *b, Ins *i, RMap *m)
r = RBASE(ip->arg[0].val);
if (rfind(m, r) == -1)
radd(m, r, r);
*ip = (Ins){ONop, R, {R, R}};
}
pmgen();
#ifdef TEST_PMOV
return 0;
#endif
nins = curi-insb;
ib = alloc((b->nins + nins - (i1-i)) * sizeof(Ins));
memcpy(ip = ib, b->ins, (i - b->ins) * sizeof(Ins));
ip += i - b->ins;
memcpy(ir = ip, insb, nins * sizeof(Ins));
ip += nins;
memcpy(ip, i1, (&b->ins[b->nins] - i1) * sizeof(Ins));
b->nins += nins - (i1-i);
free(b->ins);
b->ins = ib;
return ir;
assert(curi-insb <= i1-i);
return memcpy(i, insb, (curi-insb) * sizeof(Ins));
}
/* register allocation