From: Harald Anlauf <anlauf@gmx.de>
Date: Fri, 14 Jan 2022 20:48:15 +0000 (+0100)
Subject: Fortran: always reject alternate return specifier as argument of intrinsics
X-Git-Tag: basepoints/gcc-13~1717
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=70e24c9682ddbcade0301665bccd8e7f928d0082;p=thirdparty%2Fgcc.git

Fortran: always reject alternate return specifier as argument of intrinsics

The intrinsics MOVE_ALLOC, C_F_POINTER, and C_F_PROCPOINTER require
deferred checks of part of their actual argument types which may be of
"any" type.  This however excludes alternate return specifiers which
therefore must be unconditionally rejected for all standard intrinsics.

gcc/fortran/ChangeLog:

	PR fortran/99256
	* intrinsic.c: Do not check formal argument type when checking
	arguments of intrinsics for alternate return specifiers.

gcc/testsuite/ChangeLog:

	PR fortran/99256
	* gfortran.dg/altreturn_11.f90: New test.
---

diff --git a/gcc/fortran/intrinsic.c b/gcc/fortran/intrinsic.c
index a7ecdb401ef9..9746cd5ddb6d 100644
--- a/gcc/fortran/intrinsic.c
+++ b/gcc/fortran/intrinsic.c
@@ -4420,7 +4420,7 @@ do_sort:
   FOR_EACH_VEC_ELT (dummy_args, idx, f)
     {
       a = ordered_actual_args[idx];
-      if (a && a->label != NULL && f->ts.type)
+      if (a && a->label != NULL)
 	{
 	  gfc_error ("ALTERNATE RETURN not permitted at %L", where);
 	  return false;
diff --git a/gcc/testsuite/gfortran.dg/altreturn_11.f90 b/gcc/testsuite/gfortran.dg/altreturn_11.f90
new file mode 100644
index 000000000000..be42971d781b
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/altreturn_11.f90
@@ -0,0 +1,15 @@
+! { dg-do compile }
+! { dg-prune-output "Obsolescent feature: Alternate-return argument" }
+! PR fortran/99256 - ICE in variable_check
+! Contributed by G.Steimetz
+
+program test
+  use iso_c_binding
+  type(c_ptr)    :: i
+  type(c_funptr) :: p
+  call move_alloc     (*1, *2) ! { dg-error "ALTERNATE RETURN" }
+  call c_f_pointer     (i, *1) ! { dg-error "ALTERNATE RETURN" }
+  call c_f_procpointer (p, *2) ! { dg-error "ALTERNATE RETURN" }
+1 continue
+2 stop
+end