Hi all,
with the priceless support of Tobias I've almost realized the patch
for this PR. In attachment there's the second draft. During the
regression test I have only one error with select_type_4.f90. The
problem is in the destroy_list subroutine when it checks
associated(node) after the first deallocate(node).
2012/6/5 Paul Richard Thomas <paul.richard.tho...@gmail.com>:
> Hi Alessandro,
>
> I am glad to see that Janus is giving you a helping hand, in addition
> to Tobias. I am so tied up with every aspect of life that gfortran is
> not figuring much at all.
>
> When you clean up the patch, you might consider making this into a
> separate function:
>
> + if (free_proc)
> + {
> + ppc = gfc_copy_expr(free_proc->initializer);
> + ppc_code = gfc_get_code ();
> + ppc_code->resolved_sym = ppc->symtree->n.sym;
> + ppc_code->resolved_sym->attr.elemental = 1;
> + ppc_code->ext.actual = actual;
> + ppc_code->expr1 = ppc;
> + ppc_code->op = EXEC_CALL;
> + tmp = gfc_trans_call (ppc_code, true, NULL, NULL, false);
> + gfc_free_statements (ppc_code);
> + gfc_add_expr_to_block (&block, tmp);
> + }
>
> ... and using the function call to replace the corresponding call to
> _copy in trans_allocate.
>
> I suspect that we are going to do this some more :-)
>
> Once we have the separate function, we could at later stage replace it
> by a TREE_SSA version.
>
> Cheers
>
> Paul
>
> On 3 June 2012 12:15, Alessandro Fanfarillo <fanfarillo....@gmail.com> wrote:
>>> Right, the problem is that the _free component is missing. Just as the
>>> _copy component, _free should be present for *every* vtype, no matter
>>> if there are allocatable components or not. If the _free component is
>>> not needed, it should be initialized to EXPR_NULL.
>>
>> With an "empty" _free function for every type which does not have
>> allocatable components the problem with dynamic_dispatch_4.f03
>> disappears :), thank you very much. In the afternoon I'll reorganize
>> the code.
>>
>> Bye.
>>
>> Alessandro
>
>
>
> --
> The knack of flying is learning how to throw yourself at the ground and miss.
> --Hitchhikers Guide to the Galaxy
Index: gcc/testsuite/gfortran.dg/class_19.f03
===================================================================
--- gcc/testsuite/gfortran.dg/class_19.f03 (revisione 188002)
+++ gcc/testsuite/gfortran.dg/class_19.f03 (copia locale)
@@ -39,5 +39,5 @@ program main
end program main
-! { dg-final { scan-tree-dump-times "__builtin_free" 11 "original" } }
+! { dg-final { scan-tree-dump-times "__builtin_free" 14 "original" } }
! { dg-final { cleanup-tree-dump "original" } }
Index: gcc/testsuite/gfortran.dg/auto_dealloc_2.f90
===================================================================
--- gcc/testsuite/gfortran.dg/auto_dealloc_2.f90 (revisione 188002)
+++ gcc/testsuite/gfortran.dg/auto_dealloc_2.f90 (copia locale)
@@ -25,5 +25,5 @@ contains
end program
-! { dg-final { scan-tree-dump-times "__builtin_free" 3 "original" } }
+! { dg-final { scan-tree-dump-times "__builtin_free" 4 "original" } }
! { dg-final { cleanup-tree-dump "original" } }
Index: gcc/fortran/trans-stmt.c
===================================================================
--- gcc/fortran/trans-stmt.c (revisione 188002)
+++ gcc/fortran/trans-stmt.c (copia locale)
@@ -5341,7 +5341,12 @@ gfc_trans_deallocate (gfc_code *code)
for (al = code->ext.alloc.list; al != NULL; al = al->next)
{
- gfc_expr *expr = gfc_copy_expr (al->expr);
+ gfc_expr *expr;
+ gfc_expr *ppc;
+ gfc_code *ppc_code;
+ gfc_actual_arglist *actual;
+ expr = gfc_copy_expr (al->expr);
+ ppc = gfc_copy_expr (expr);
gcc_assert (expr->expr_type == EXPR_VARIABLE);
if (expr->ts.type == BT_CLASS)
@@ -5354,6 +5359,24 @@ gfc_trans_deallocate (gfc_code *code)
se.descriptor_only = 1;
gfc_conv_expr (&se, expr);
+ actual = gfc_get_actual_arglist ();
+ actual->expr = gfc_copy_expr (expr);
+
+ if (expr->symtree->n.sym->ts.type == BT_CLASS)
+ {
+ gfc_add_vptr_component (ppc);
+ gfc_add_component_ref (ppc, "_free");
+ ppc_code = gfc_get_code ();
+ ppc_code->resolved_sym = ppc->symtree->n.sym;
+ ppc_code->resolved_sym->attr.elemental = 1;
+ ppc_code->ext.actual = actual;
+ ppc_code->expr1 = ppc;
+ ppc_code->op = EXEC_CALL;
+ tmp = gfc_trans_call (ppc_code, true, NULL, NULL, false);
+ gfc_free_statements (ppc_code);
+ gfc_add_expr_to_block (&block, tmp);
+ }
+
if (expr->rank || gfc_is_coarray (expr))
{
if (expr->ts.type == BT_DERIVED &&
expr->ts.u.derived->attr.alloc_comp)
Index: gcc/fortran/class.c
===================================================================
--- gcc/fortran/class.c (revisione 188002)
+++ gcc/fortran/class.c (copia locale)
@@ -717,6 +717,9 @@ gfc_find_derived_vtab (gfc_symbol *derived)
gfc_namespace *ns;
gfc_symbol *vtab = NULL, *vtype = NULL, *found_sym = NULL, *def_init = NULL;
gfc_symbol *copy = NULL, *src = NULL, *dst = NULL;
+ gfc_symbol *free = NULL, *tofree = NULL;
+ gfc_component *temp = NULL;
+ bool der_comp_alloc, comp_alloc, class_comp_alloc;
/* Find the top-level namespace (MODULE or PROGRAM). */
for (ns = gfc_current_ns; ns; ns = ns->parent)
@@ -907,6 +910,118 @@ gfc_find_derived_vtab (gfc_symbol *derived)
c->ts.interface = copy;
}
+ /* Add component _free. */
+ der_comp_alloc = false;
+ comp_alloc = false;
+ class_comp_alloc = false;
+
+ for (temp = derived->components; temp; temp = temp->next)
+ {
+ if (temp == derived->components && derived->attr.extension)
+ continue;
+
+ if (temp->ts.type == BT_DERIVED
+ && !temp->attr.pointer
+ && (temp->attr.alloc_comp || temp->attr.allocatable))
+ der_comp_alloc = true;
+ else if (temp->ts.type != BT_DERIVED
+ && !temp->attr.pointer
+ && (temp->attr.alloc_comp
+ || temp->attr.allocatable))
+ comp_alloc = true;
+ else if (temp->ts.u.derived
+ && temp->ts.type == BT_CLASS
+ && CLASS_DATA (temp)
+ && CLASS_DATA (temp)->attr.allocatable)
+ class_comp_alloc = true;
+ }
+ if (derived->attr.extension
+ && (!der_comp_alloc && !comp_alloc && !class_comp_alloc))
+ {
+ gfc_component *parent = derived->components;
+ gfc_component *free_proc = NULL;
+ gfc_symbol *vtab2 = NULL;
+ gfc_expr *tmp1 = NULL, *tmp2 = NULL;
+ vtab2 = gfc_find_derived_vtab (parent->ts.u.derived);
+
+ for (free_proc = vtab2->ts.u.derived->components;
+ free_proc; free_proc = free_proc->next)
+ if (free_proc->name[0] == '_'
+ && free_proc->name[1] == 'f')
+ break;
+
+ if (!free_proc)
+ goto end_vtab;
+
+ if (gfc_add_component (vtype, "_free", &c) == FAILURE)
+ goto cleanup;
+ c->attr.proc_pointer = 1;
+ c->attr.access = ACCESS_PRIVATE;
+ c->tb = XCNEW (gfc_typebound_proc);
+ c->tb->ppc = 1;
+ /* Not sure about this part */
+ if (free_proc->ts.interface && free_proc->initializer)
+ {
+ tmp1 = gfc_lval_expr_from_sym (free_proc->ts.interface);
+ tmp2 = gfc_copy_expr (tmp1);
+ c->initializer = tmp2;
+ c->ts.interface = tmp2->symtree->n.sym;
+ }
+ }
+ else
+ {
+ gfc_alloc *head = NULL;
+ if (gfc_add_component (vtype, "_free", &c) == FAILURE)
+ goto cleanup;
+ c->attr.proc_pointer = 1;
+ c->attr.access = ACCESS_PRIVATE;
+ c->tb = XCNEW (gfc_typebound_proc);
+ c->tb->ppc = 1;
+ if (derived->attr.abstract)
+ c->initializer = gfc_get_null_expr (NULL);
+ else
+ {
+ /* Set up namespace. */
+ gfc_namespace *sub_ns2 = gfc_get_namespace (ns, 0);
+ sub_ns2->sibling = ns->contained;
+ ns->contained = sub_ns2;
+ sub_ns2->resolved = 1;
+ /* Set up procedure symbol. */
+ sprintf (name, "__free_%s", tname);
+ gfc_get_symbol (name, sub_ns2, &free);
+ sub_ns2->proc_name = free;
+ free->attr.flavor = FL_PROCEDURE;
+ free->attr.subroutine = 1;
+ free->attr.if_source = IFSRC_DECL;
+ /* This is elemental so that arrays are automatically
+ treated correctly by the scalarizer. */
+ free->attr.elemental = 1;
+ free->attr.pure = 1;
+ if (ns->proc_name->attr.flavor == FL_MODULE)
+ free->module = ns->proc_name->name;
+ gfc_set_sym_referenced (free);
+ /* Set up formal arguments. */
+ gfc_get_symbol ("tofree", sub_ns2, &tofree);
+ tofree->ts.type = BT_DERIVED;
+ tofree->ts.u.derived = derived;
+ tofree->attr.flavor = FL_VARIABLE;
+ tofree->attr.dummy = 1;
+ tofree->attr.intent = INTENT_OUT;
+ gfc_set_sym_referenced (tofree);
+ free->formal = gfc_get_formal_arglist ();
+ free->formal->sym = tofree;
+ /* Set up code. */
+ sub_ns2->code = gfc_get_code ();
+ sub_ns2->code->op = EXEC_NOP;
+ head = gfc_get_alloc ();
+ head->expr = gfc_lval_expr_from_sym (tofree);
+ sub_ns2->code->ext.alloc.list = head;
+ /* Set initializer. */
+ c->initializer = gfc_lval_expr_from_sym (free);
+ c->ts.interface = free;
+ }
+ }
+end_vtab:
/* Add procedure pointers for type-bound procedures. */
add_procs_to_declared_vtab (derived, vtype);
}
@@ -935,6 +1050,10 @@ cleanup:
gfc_commit_symbol (src);
if (dst)
gfc_commit_symbol (dst);
+ if (free)
+ gfc_commit_symbol (free);
+ if (tofree)
+ gfc_commit_symbol (tofree);
}
else
gfc_undo_symbols ();
