}
-/* Recursive function to find a pointer within a tree by brute force. */
-
-static pointer_info *
-fp2 (pointer_info *p, const void *target)
-{
- pointer_info *q;
-
- if (p == NULL)
- return NULL;
-
- if (p->u.pointer == target)
- return p;
-
- q = fp2 (p->left, target);
- if (q != NULL)
- return q;
-
- return fp2 (p->right, target);
-}
-
-
-/* During reading, find a pointer_info node from the pointer value.
- This amounts to a brute-force search. */
-
-static pointer_info *
-find_pointer2 (void *p)
-{
- return fp2 (pi_root, p);
-}
-
-
/* Resolve any fixups using a known pointer. */
static void
the namespace and is not loaded again. */
static void
-mio_component_ref (gfc_component **cp, gfc_symbol *sym)
+mio_component_ref (gfc_component **cp)
{
- char name[GFC_MAX_SYMBOL_LEN + 1];
- gfc_component *q;
pointer_info *p;
p = mio_pointer_ref (cp);
if (p->type == P_UNKNOWN)
p->type = P_COMPONENT;
-
- if (iomode == IO_OUTPUT)
- mio_pool_string (&(*cp)->name);
- else
- {
- mio_internal_string (name);
-
- if (sym && sym->attr.is_class)
- sym = sym->components->ts.u.derived;
-
- /* It can happen that a component reference can be read before the
- associated derived type symbol has been loaded. Return now and
- wait for a later iteration of load_needed. */
- if (sym == NULL)
- return;
-
- if (sym->components != NULL && p->u.pointer == NULL)
- {
- /* Symbol already loaded, so search by name. */
- q = gfc_find_component (sym, name, true, true);
-
- if (q)
- associate_integer_pointer (p, q);
- }
-
- /* Make sure this symbol will eventually be loaded. */
- p = find_pointer2 (sym);
- if (p->u.rsym.state == UNUSED)
- p->u.rsym.state = NEEDED;
- }
}
case REF_COMPONENT:
mio_symbol_ref (&r->u.c.sym);
- mio_component_ref (&r->u.c.component, r->u.c.sym);
+ mio_component_ref (&r->u.c.component);
break;
case REF_SUBSTRING:
/* Unlike most other routines, the address of the symbol node is already
- fixed on input and the name/module has already been filled in. */
+ fixed on input and the name/module has already been filled in.
+ If you update the symbol format here, don't forget to update read_module
+ as well (look for "seek to the symbol's component list"). */
static void
mio_symbol (gfc_symbol *sym)
}
-/* Skip a list between balanced left and right parens. */
+/* Skip a list between balanced left and right parens.
+ By setting NEST_LEVEL one assumes that a number of NEST_LEVEL opening parens
+ have been already parsed by hand, and the remaining of the content is to be
+ skipped here. The default value is 0 (balanced parens). */
static void
-skip_list (void)
+skip_list (int nest_level = 0)
{
int level;
- level = 0;
+ level = nest_level;
do
{
switch (parse_atom ())
info->u.rsym.ns = atom_int;
get_module_locus (&info->u.rsym.where);
- skip_list ();
/* See if the symbol has already been loaded by a previous module.
If so, we reference the existing symbol and prevent it from
if (sym == NULL
|| (sym->attr.flavor == FL_VARIABLE && info->u.rsym.ns !=1))
- continue;
+ {
+ skip_list ();
+ continue;
+ }
info->u.rsym.state = USED;
info->u.rsym.sym = sym;
+ /* The current symbol has already been loaded, so we can avoid loading
+ it again. However, if it is a derived type, some of its components
+ can be used in expressions in the module. To avoid the module loading
+ failing, we need to associate the module's component pointer indexes
+ with the existing symbol's component pointers. */
+ if (sym->attr.flavor == FL_DERIVED)
+ {
+ gfc_component *c;
+
+ /* First seek to the symbol's component list. */
+ mio_lparen (); /* symbol opening. */
+ skip_list (); /* skip symbol attribute. */
+ skip_list (); /* typespec. */
+ require_atom (ATOM_INTEGER); /* namespace ref. */
+ require_atom (ATOM_INTEGER); /* common ref. */
+ skip_list (); /* formal args. */
+ /* no value. */
+ skip_list (); /* array_spec. */
+ require_atom (ATOM_INTEGER); /* result. */
+ /* not a cray pointer. */
+
+ mio_lparen (); /* component list opening. */
+ for (c = sym->components; c; c = c->next)
+ {
+ pointer_info *p;
+ const char *comp_name;
+ int n;
+
+ mio_lparen (); /* component opening. */
+ mio_integer (&n);
+ p = get_integer (n);
+ if (p->u.pointer == NULL)
+ associate_integer_pointer (p, c);
+ mio_pool_string (&comp_name);
+ gcc_assert (comp_name == c->name);
+ skip_list (1); /* component end. */
+ }
+ mio_rparen (); /* component list closing. */
+
+ skip_list (1); /* symbol end. */
+ }
+ else
+ skip_list ();
/* Some symbols do not have a namespace (eg. formal arguments),
so the automatic "unique symtree" mechanism must be suppressed
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