static void
confirm_condition (segment_info *s1, gfc_equiv *eq1, segment_info *s2,
gfc_equiv *eq2)
{
HOST_WIDE_INT offset1, offset2;
offset1 = calculate_offset (eq1->expr);
offset2 = calculate_offset (eq2->expr);
if (s1->offset + offset1 != s2->offset + offset2)
gfc_error_1 ("Inconsistent equivalence rules involving '%s' at %L and "
"'%s' at %L", s1->sym->name, &s1->sym->declared_at,
s2->sym->name, &s2->sym->declared_at);
}
bool
gfc_assign_data_value (gfc_expr *lvalue, gfc_expr *rvalue, mpz_t index,
mpz_t *repeat)
{
gfc_ref *ref;
gfc_expr *init;
gfc_expr *expr = NULL;
gfc_constructor *con;
gfc_constructor *last_con;
gfc_symbol *symbol;
gfc_typespec *last_ts;
mpz_t offset;
symbol = lvalue->symtree->n.sym;
init = symbol->value;
last_ts = &symbol->ts;
last_con = NULL;
mpz_init_set_si (offset, 0);
/* Find/create the parent expressions for subobject references. */
for (ref = lvalue->ref; ref; ref = ref->next)
{
/* Break out of the loop if we find a substring. */
if (ref->type == REF_SUBSTRING)
{
/* A substring should always be the last subobject reference. */
gcc_assert (ref->next == NULL);
break;
}
/* Use the existing initializer expression if it exists. Otherwise
create a new one. */
if (init == NULL)
expr = gfc_get_expr ();
else
expr = init;
/* Find or create this element. */
switch (ref->type)
{
case REF_ARRAY:
if (ref->u.ar.as->rank == 0)
{
gcc_assert (ref->u.ar.as->corank > 0);
if (init == NULL)
free (expr);
continue;
}
if (init && expr->expr_type != EXPR_ARRAY)
{
gfc_error_1 ("'%s' at %L already is initialized at %L",
lvalue->symtree->n.sym->name, &lvalue->where,
&init->where);
goto abort;
}
if (init == NULL)
{
/* The element typespec will be the same as the array
typespec. */
expr->ts = *last_ts;
/* Setup the expression to hold the constructor. */
expr->expr_type = EXPR_ARRAY;
expr->rank = ref->u.ar.as->rank;
}
if (ref->u.ar.type == AR_ELEMENT)
get_array_index (&ref->u.ar, &offset);
else
mpz_set (offset, index);
/* Check the bounds. */
if (mpz_cmp_si (offset, 0) < 0)
{
gfc_error ("Data element below array lower bound at %L",
&lvalue->where);
goto abort;
}
else if (repeat != NULL
&& ref->u.ar.type != AR_ELEMENT)
{
mpz_t size, end;
gcc_assert (ref->u.ar.type == AR_FULL
&& ref->next == NULL);
mpz_init_set (end, offset);
mpz_add (end, end, *repeat);
if (spec_size (ref->u.ar.as, &size))
{
if (mpz_cmp (end, size) > 0)
{
mpz_clear (size);
gfc_error ("Data element above array upper bound at %L",
&lvalue->where);
goto abort;
}
mpz_clear (size);
}
con = gfc_constructor_lookup (expr->value.constructor,
mpz_get_si (offset));
if (!con)
{
con = gfc_constructor_lookup_next (expr->value.constructor,
mpz_get_si (offset));
if (con != NULL && mpz_cmp (con->offset, end) >= 0)
con = NULL;
}
/* Overwriting an existing initializer is non-standard but
usually only provokes a warning from other compilers. */
if (con != NULL && con->expr != NULL)
{
/* Order in which the expressions arrive here depends on
whether they are from data statements or F95 style
declarations. Therefore, check which is the most
recent. */
gfc_expr *exprd;
exprd = (LOCATION_LINE (con->expr->where.lb->location)
> LOCATION_LINE (rvalue->where.lb->location))
? con->expr : rvalue;
if (gfc_notify_std (GFC_STD_GNU,
"re-initialization of %qs at %L",
symbol->name, &exprd->where) == false)
return false;
}
while (con != NULL)
{
gfc_constructor *next_con = gfc_constructor_next (con);
if (mpz_cmp (con->offset, end) >= 0)
break;
if (mpz_cmp (con->offset, offset) < 0)
{
gcc_assert (mpz_cmp_si (con->repeat, 1) > 0);
mpz_sub (con->repeat, offset, con->offset);
}
else if (mpz_cmp_si (con->repeat, 1) > 0
&& mpz_get_si (con->offset)
+ mpz_get_si (con->repeat) > mpz_get_si (end))
{
int endi;
splay_tree_node node
= splay_tree_lookup (con->base,
mpz_get_si (con->offset));
gcc_assert (node
&& con == (gfc_constructor *) node->value
&& node->key == (splay_tree_key)
mpz_get_si (con->offset));
endi = mpz_get_si (con->offset)
+ mpz_get_si (con->repeat);
if (endi > mpz_get_si (end) + 1)
mpz_set_si (con->repeat, endi - mpz_get_si (end));
else
mpz_set_si (con->repeat, 1);
mpz_set (con->offset, end);
node->key = (splay_tree_key) mpz_get_si (end);
break;
}
else
gfc_constructor_remove (con);
con = next_con;
}
con = gfc_constructor_insert_expr (&expr->value.constructor,
NULL, &rvalue->where,
mpz_get_si (offset));
mpz_set (con->repeat, *repeat);
repeat = NULL;
mpz_clear (end);
break;
}
else
{
mpz_t size;
if (spec_size (ref->u.ar.as, &size))
{
if (mpz_cmp (offset, size) >= 0)
{
mpz_clear (size);
gfc_error ("Data element above array upper bound at %L",
&lvalue->where);
goto abort;
}
mpz_clear (size);
}
}
con = gfc_constructor_lookup (expr->value.constructor,
mpz_get_si (offset));
if (!con)
{
con = gfc_constructor_insert_expr (&expr->value.constructor,
NULL, &rvalue->where,
mpz_get_si (offset));
}
else if (mpz_cmp_si (con->repeat, 1) > 0)
{
/* Need to split a range. */
if (mpz_cmp (con->offset, offset) < 0)
{
gfc_constructor *pred_con = con;
con = gfc_constructor_insert_expr (&expr->value.constructor,
NULL, &con->where,
mpz_get_si (offset));
con->expr = gfc_copy_expr (pred_con->expr);
mpz_add (con->repeat, pred_con->offset, pred_con->repeat);
mpz_sub (con->repeat, con->repeat, offset);
mpz_sub (pred_con->repeat, offset, pred_con->offset);
}
if (mpz_cmp_si (con->repeat, 1) > 0)
{
gfc_constructor *succ_con;
succ_con
= gfc_constructor_insert_expr (&expr->value.constructor,
NULL, &con->where,
mpz_get_si (offset) + 1);
succ_con->expr = gfc_copy_expr (con->expr);
mpz_sub_ui (succ_con->repeat, con->repeat, 1);
mpz_set_si (con->repeat, 1);
}
}
break;
case REF_COMPONENT:
if (init == NULL)
{
/* Setup the expression to hold the constructor. */
expr->expr_type = EXPR_STRUCTURE;
expr->ts.type = BT_DERIVED;
expr->ts.u.derived = ref->u.c.sym;
}
else
gcc_assert (expr->expr_type == EXPR_STRUCTURE);
last_ts = &ref->u.c.component->ts;
/* Find the same element in the existing constructor. */
con = find_con_by_component (ref->u.c.component,
expr->value.constructor);
if (con == NULL)
{
/* Create a new constructor. */
con = gfc_constructor_append_expr (&expr->value.constructor,
NULL, NULL);
con->n.component = ref->u.c.component;
}
break;
default:
gcc_unreachable ();
}
if (init == NULL)
{
/* Point the container at the new expression. */
if (last_con == NULL)
symbol->value = expr;
else
last_con->expr = expr;
}
init = con->expr;
last_con = con;
}
mpz_clear (offset);
gcc_assert (repeat == NULL);
if (ref || last_ts->type == BT_CHARACTER)
{
if (lvalue->ts.u.cl->length == NULL && !(ref && ref->u.ss.length != NULL))
return false;
expr = create_character_initializer (init, last_ts, ref, rvalue);
}
else
{
/* Overwriting an existing initializer is non-standard but usually only
provokes a warning from other compilers. */
if (init != NULL)
{
/* Order in which the expressions arrive here depends on whether
they are from data statements or F95 style declarations.
Therefore, check which is the most recent. */
expr = (LOCATION_LINE (init->where.lb->location)
> LOCATION_LINE (rvalue->where.lb->location))
? init : rvalue;
if (gfc_notify_std (GFC_STD_GNU,
"re-initialization of %qs at %L",
symbol->name, &expr->where) == false)
return false;
}
expr = gfc_copy_expr (rvalue);
if (!gfc_compare_types (&lvalue->ts, &expr->ts))
gfc_convert_type (expr, &lvalue->ts, 0);
}
if (last_con == NULL)
symbol->value = expr;
else
last_con->expr = expr;
return true;
abort:
if (!init)
gfc_free_expr (expr);
mpz_clear (offset);
return false;
}