From c6f9d47f2e631a7ace71466ba6ec6f323d791b1b Mon Sep 17 00:00:00 2001
From: Harald Anlauf <anlauf@gmx.de>
Date: Sun, 27 Nov 2022 21:10:18 +0100
Subject: [PATCH] Fortran: ICE with elemental and dummy argument with VALUE
attribute [PR107819]
gcc/fortran/ChangeLog:
PR fortran/107819
* trans-stmt.cc (gfc_conv_elemental_dependencies): In checking for
elemental dependencies, treat dummy argument with VALUE attribute
as implicitly having intent(in).
gcc/testsuite/ChangeLog:
PR fortran/107819
* gfortran.dg/elemental_dependency_7.f90: New test.
---
gcc/fortran/trans-stmt.cc | 1 +
.../gfortran.dg/elemental_dependency_7.f90 | 28 +++++++++++++++++++
2 files changed, 29 insertions(+)
create mode 100644 gcc/testsuite/gfortran.dg/elemental_dependency_7.f90
@@ -264,6 +264,7 @@ gfc_conv_elemental_dependencies (gfc_se * se, gfc_se * loopse,
if (e->expr_type == EXPR_VARIABLE
&& e->rank && fsym
&& fsym->attr.intent != INTENT_IN
+ && !fsym->attr.value
&& gfc_check_fncall_dependency (e, fsym->attr.intent,
sym, arg0, check_variable))
{
new file mode 100644
@@ -0,0 +1,28 @@
+! { dg-do run }
+! PR fortran/107819 - ICE in gfc_check_argument_var_dependency
+! Contributed by G.Steinmetz
+!
+! Note: the testcase is considered non-conforming for m>1 due to aliasing
+
+program p
+ implicit none
+ integer, parameter :: m = 1
+ integer :: i
+ integer :: a(m) = [(-i,i=1,m)]
+ integer :: n(m) = [(i,i=m,1,-1)]
+ integer :: b(m)
+ b = a
+ call s (a(n), a) ! { dg-warning "might interfere with actual argument" }
+
+ ! Compare to separate application of subroutine in element order
+ do i = 1, size (b)
+ call s (b(n(i)), b(i))
+ end do
+ if (any (a /= b)) stop 1
+contains
+ elemental subroutine s (x, y)
+ integer, value :: x
+ integer, intent(out) :: y
+ y = x
+ end
+end
--
2.35.3