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Improved code generation for sets somewhat

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This commit is contained in:
ceriel 1991-03-25 13:28:50 +00:00
parent 8b67c1f800
commit ca06e574ca
1 changed files with 19 additions and 6 deletions
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23
lang/m2/comp/code.c
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@ -137,13 +137,21 @@ CodeExpr(nd, ds, true_label, false_label)
case Set: {
register unsigned i = (unsigned) (tp->tp_size) / (int) word_size;
register arith *st = nd->nd_set + i;
int null_set = 1;
ds->dsg_kind = DSG_LOADED;
for (; i; i--) {
if (*--st != 0) null_set = 0;
}
if (! null_set) {
i = (unsigned) (tp->tp_size) / (int) word_size;
st = nd->nd_set + i;
for (; i; i--) {
C_loc(*--st);
}
}
FreeSet(nd->nd_set);
CodeSet(nd);
CodeSet(nd, null_set);
}
break;
@ -992,7 +1000,7 @@ CodeUoper(nd)
}
}
CodeSet(nd)
CodeSet(nd, null_set)
register t_node *nd;
{
register t_type *tp = nd->nd_type;
@ -1001,18 +1009,23 @@ CodeSet(nd)
while (nd) {
assert(nd->nd_class == Link && nd->nd_symb == ',');
if (nd->nd_LEFT) CodeEl(nd->nd_LEFT, tp);
if (nd->nd_LEFT) {
CodeEl(nd->nd_LEFT, tp, null_set);
null_set = 0;
}
nd = nd->nd_RIGHT;
}
if (null_set) C_zer(tp->tp_size);
}
CodeEl(nd, tp)
CodeEl(nd, tp, null_set)
register t_node *nd;
register t_type *tp;
{
register t_type *eltype = ElementType(tp);
if (nd->nd_class == Link && nd->nd_symb == UPTO) {
if (null_set) C_zer(tp->tp_size);
C_loc(tp->set_low);
C_loc(tp->tp_size); /* push size */
if (eltype->tp_fund == T_SUBRANGE) {
@ -1028,7 +1041,7 @@ CodeEl(nd, tp)
C_loc(tp->set_low);
C_sbi(word_size);
C_set(tp->tp_size);
C_ior(tp->tp_size);
if (! null_set) C_ior(tp->tp_size);
}
}