re PR fortran/33162 (INTRINSIC functions as ACTUAL argument)

2007-11-11  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR fortran/33162
	* decl.c (match_procedure_decl): Remove TODO and allow intrinsics in
	PROCEDURE declarations.  Set attr.untyped to allow the interface to be
	resolved later where the symbol type will be set.
	* interface.c (compare_intr_interfaces): Remove static from pointer
	declarations.  Add type and kind checks for dummy function arguments.
	(compare_actual_formal_intr): New function to compare an actual
	argument with an intrinsic function. (gfc_procedures_use): Add check for
	interface that points to an intrinsic function, use the new function.
	* resolve.c (resolve_specific_f0): Resolve the intrinsic interface.
	(resolve_specific_s0): Ditto.

From-SVN: r130168

gcc/fortran/ChangeLog

+2007-11-11  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+	PR fortran/33162
+	* decl.c (match_procedure_decl): Remove TODO and allow intrinsics in
+	PROCEDURE declarations.  Set attr.untyped to allow the interface to be
+	resolved later where the symbol type will be set.
+	* interface.c (compare_intr_interfaces): Remove static from pointer
+	declarations.  Add type and kind checks for dummy function arguments.
+	(compare_actual_formal_intr): New function to compare an actual
+	argument with an intrinsic function. (gfc_procedures_use): Add check for
+	interface that points to an intrinsic function, use the new function.
+	* resolve.c (resolve_specific_f0): Resolve the intrinsic interface.
+	(resolve_specific_s0): Ditto.
+
 2007-11-13  Paul Thomas  <pault@gcc.gnu.org>
 
 	PR fortran/34080

gcc/fortran/decl.c

@@ -3968,19 +3968,9 @@ match_procedure_decl (void)
 		    "in PROCEDURE statement at %C", proc_if->name);
 	  return MATCH_ERROR;
 	}
-      /* TODO: Allow intrinsics with gfc_intrinsic_actual_ok
-	 (proc_if->name, 0) after PR33162 is fixed.  */
-      if (proc_if->attr.intrinsic)
-	{
-	  gfc_error ("Fortran 2003: Support for intrinsic procedure '%s' "
-		     "in PROCEDURE statement at %C not yet implemented "
-		     "in gfortran", proc_if->name);
-	  return MATCH_ERROR;
-	}
     }
 
 got_ts:
-
   if (gfc_match (" )") != MATCH_YES)
     {
       gfc_current_locus = entry_loc;
@@ -3995,7 +3985,6 @@ got_ts:
   /* Get procedure symbols.  */
   for(num=1;;num++)
     {
-
       m = gfc_match_symbol (&sym, 0);
       if (m == MATCH_NO)
 	goto syntax;
@@ -4040,7 +4029,10 @@ got_ts:
 
       /* Set interface.  */
       if (proc_if != NULL)
+	{
 	  sym->interface = proc_if;
+	  sym->attr.untyped = 1;
+	}
       else if (current_ts.type != BT_UNKNOWN)
 	{
 	  sym->interface = gfc_new_symbol ("", gfc_current_ns);

gcc/fortran/interface.c

@@ -977,14 +977,26 @@ compare_interfaces (gfc_symbol *s1, gfc_symbol *s2, int generic_flag)
 static int
 compare_intr_interfaces (gfc_symbol *s1, gfc_symbol *s2)
 {
-  static gfc_formal_arglist *f, *f1;
-  static gfc_intrinsic_arg *fi, *f2;
+  gfc_formal_arglist *f, *f1;
+  gfc_intrinsic_arg *fi, *f2;
   gfc_intrinsic_sym *isym;
 
   if (s1->attr.function != s2->attr.function
       || s1->attr.subroutine != s2->attr.subroutine)
     return 0;		/* Disagreement between function/subroutine.  */
   
+  /* If the arguments are functions, check type and kind.  */
+  
+  if (s1->attr.dummy && s1->attr.function && s2->attr.function)
+    {
+      if (s1->ts.type != s2->ts.type)
+	return 0;
+      if (s1->ts.kind != s2->ts.kind)
+	return 0;
+      if (s1->attr.if_source == IFSRC_DECL)
+	return 1;
+    }
+
   isym = gfc_find_function (s2->name);
   
   /* This should already have been checked in
@@ -1024,6 +1036,55 @@ compare_intr_interfaces (gfc_symbol *s1, gfc_symbol *s2)
 }
 
 
+/* Compare an actual argument list with an intrinsic argument list.  */
+
+static int
+compare_actual_formal_intr (gfc_actual_arglist **ap, gfc_symbol *s2)
+{
+  gfc_actual_arglist *a;
+  gfc_intrinsic_arg *fi, *f2;
+  gfc_intrinsic_sym *isym;
+
+  isym = gfc_find_function (s2->name);
+  
+  /* This should already have been checked in
+     resolve.c (resolve_actual_arglist).  */
+  gcc_assert (isym);
+
+  f2 = isym->formal;
+
+  /* Special case.  */
+  if (*ap == NULL && f2 == NULL)
+    return 1;
+  
+  /* First scan through the actual argument list and check the intrinsic.  */
+  fi = f2;
+  for (a = *ap; a; a = a->next)
+    {
+      if (fi == NULL)
+	return 0;
+      if ((fi->ts.type != a->expr->ts.type)
+	  || (fi->ts.kind != a->expr->ts.kind))
+	return 0;
+      fi = fi->next;
+    }
+
+  /* Now scan through the intrinsic argument list and check the formal.  */
+  a = *ap;
+  for (fi = f2; fi; fi = fi->next)
+    {
+      if (a == NULL)
+	return 0;
+      if ((fi->ts.type != a->expr->ts.type)
+	  || (fi->ts.kind != a->expr->ts.kind))
+	return 0;
+      a = a->next;
+    }
+
+  return 1;
+}
+
+
 /* Given a pointer to an interface pointer, remove duplicate
    interfaces and make sure that all symbols are either functions or
    subroutines.  Returns nonzero if something goes wrong.  */
@@ -2225,6 +2286,20 @@ gfc_procedure_use (gfc_symbol *sym, gfc_actual_arglist **ap, locus *where)
     gfc_warning ("Procedure '%s' called with an implicit interface at %L",
 		 sym->name, where);
 
+  if (sym->interface && sym->interface->attr.intrinsic)
+    {
+      gfc_intrinsic_sym *isym;
+      isym = gfc_find_function (sym->interface->name);
+      if (isym != NULL)
+	{
+	  if (compare_actual_formal_intr (ap, sym->interface))
+	    return;
+	  gfc_error ("Type/rank mismatch in argument '%s' at %L",
+		     sym->name, where);
+	  return;
+	}
+    }
+
   if (sym->attr.if_source == IFSRC_UNKNOWN
       || !compare_actual_formal (ap, sym->formal, 0,
 				 sym->attr.elemental, where))

gcc/fortran/resolve.c

@@ -1074,6 +1074,7 @@ resolve_actual_arglist (gfc_actual_arglist *arg, procedure_type ptype)
 	  if (sym->ts.type == BT_UNKNOWN && sym->attr.intrinsic)
 	    {
 	      gfc_intrinsic_sym *isym;
+
 	      isym = gfc_find_function (sym->name);
 	      if (isym == NULL || !isym->specific)
 		{
@@ -1083,6 +1084,7 @@ resolve_actual_arglist (gfc_actual_arglist *arg, procedure_type ptype)
 		  return FAILURE;
 		}
 	      sym->ts = isym->ts;
+	      sym->attr.intrinsic = 1;
 	      sym->attr.function = 1;
 	    }
 	  goto argument_list;
@@ -1487,6 +1489,22 @@ resolve_specific_f0 (gfc_symbol *sym, gfc_expr *expr)
 {
   match m;
 
+  /* See if we have an intrinsic interface.  */
+
+  if (sym->interface != NULL && sym->interface->attr.intrinsic)
+    {
+      gfc_intrinsic_sym *isym;
+      isym = gfc_find_function (sym->interface->name);
+
+      /* Existance of isym should be checked already.  */
+      gcc_assert (isym);
+
+      sym->ts = isym->ts;
+      sym->attr.function = 1;
+      sym->attr.proc = PROC_EXTERNAL;
+      goto found;
+    }
+
   if (sym->attr.external || sym->attr.if_source == IFSRC_IFBODY)
     {
       if (sym->attr.dummy)
@@ -2513,6 +2531,22 @@ resolve_specific_s0 (gfc_code *c, gfc_symbol *sym)
 {
   match m;
 
+  /* See if we have an intrinsic interface.  */
+  if (sym->interface != NULL && !sym->interface->attr.abstract
+      && !sym->interface->attr.subroutine)
+    {
+      gfc_intrinsic_sym *isym;
+
+      isym = gfc_find_function (sym->interface->name);
+
+      /* Existance of isym should be checked already.  */
+      gcc_assert (isym);
+
+      sym->ts = isym->ts;
+      sym->attr.function = 1;
+      goto found;
+    }
+
   if(sym->attr.is_iso_c)
     {
       m = gfc_iso_c_sub_interface (c,sym);