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

1 files changed, 77 insertions, 2 deletions

diff --git a/gcc/fortran/interface.c b/gcc/fortran/interface.c
index 7f6406a..650cd21 100644
--- a/gcc/fortran/interface.c
+++ b/gcc/fortran/interface.c
@@ -977,13 +977,25 @@ 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);
   
@@ -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))