void
aff_combination_scale (aff_tree *comb, double_int scale)
{
unsigned i, j;
scale = double_int_ext_for_comb (scale, comb);
if (scale.is_one ())
return;
if (scale.is_zero ())
{
aff_combination_zero (comb, comb->type);
return;
}
comb->offset
= double_int_ext_for_comb (scale * comb->offset, comb);
for (i = 0, j = 0; i < comb->n; i++)
{
double_int new_coef;
new_coef
= double_int_ext_for_comb (scale * comb->elts[i].coef, comb);
/* A coefficient may become zero due to overflow. Remove the zero
elements. */
if (new_coef.is_zero ())
continue;
comb->elts[j].coef = new_coef;
comb->elts[j].val = comb->elts[i].val;
j++;
}
comb->n = j;
if (comb->rest)
{
tree type = comb->type;
if (POINTER_TYPE_P (type))
type = sizetype;
if (comb->n < MAX_AFF_ELTS)
{
comb->elts[comb->n].coef = scale;
comb->elts[comb->n].val = comb->rest;
comb->rest = NULL_TREE;
comb->n++;
}
else
comb->rest = fold_build2 (MULT_EXPR, type, comb->rest,
double_int_to_tree (type, scale));
}
}
void
aff_combination_add_elt (aff_tree *comb, tree elt, double_int scale)
{
unsigned i;
tree type;
scale = double_int_ext_for_comb (scale, comb);
if (scale.is_zero ())
return;
for (i = 0; i < comb->n; i++)
if (operand_equal_p (comb->elts[i].val, elt, 0))
{
double_int new_coef;
new_coef = comb->elts[i].coef + scale;
new_coef = double_int_ext_for_comb (new_coef, comb);
if (!new_coef.is_zero ())
{
comb->elts[i].coef = new_coef;
return;
}
comb->n--;
comb->elts[i] = comb->elts[comb->n];
if (comb->rest)
{
gcc_assert (comb->n == MAX_AFF_ELTS - 1);
comb->elts[comb->n].coef = double_int_one;
comb->elts[comb->n].val = comb->rest;
comb->rest = NULL_TREE;
comb->n++;
}
return;
}
if (comb->n < MAX_AFF_ELTS)
{
comb->elts[comb->n].coef = scale;
comb->elts[comb->n].val = elt;
comb->n++;
return;
}
type = comb->type;
if (POINTER_TYPE_P (type))
type = sizetype;
if (scale.is_one ())
elt = fold_convert (type, elt);
else
elt = fold_build2 (MULT_EXPR, type,
fold_convert (type, elt),
double_int_to_tree (type, scale));
if (comb->rest)
comb->rest = fold_build2 (PLUS_EXPR, type, comb->rest,
elt);
else
comb->rest = elt;
}