1 files changed, 78 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/char_result_3.f90 b/gcc/testsuite/gfortran.dg/char_result_3.f90
new file mode 100644
index 000000000..8b9aa9247
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/char_result_3.f90
@@ -0,0 +1,78 @@
+! Related to PR 15326.  Try calling string functions whose lengths involve
+! some sort of array calculation.
+! { dg-do run }
+pure elemental function double (x)
+  integer, intent (in) :: x
+  integer :: double
+  double = x * 2
+end function double
+
+program main
+  implicit none
+
+  interface
+    pure elemental function double (x)
+      integer, intent (in) :: x
+      integer :: double
+    end function double
+  end interface
+
+  integer, dimension (100:104), target :: a
+  integer, dimension (:), pointer :: ap
+  integer :: i, lower
+
+  a = (/ (i + 5, i = 0, 4) /)
+  ap => a
+  lower = 11
+
+  call test (f1 (a), 35)
+  call test (f1 (ap), 35)
+  call test (f1 ((/ 5, 10, 50 /)), 65)
+  call test (f1 (a (101:103)), 21)
+
+  call test (f2 (a), 115)
+  call test (f2 (ap), 115)
+  call test (f2 ((/ 5, 10, 50 /)), 119)
+  call test (f2 (a (101:103)), 116)
+
+  call test (f3 (a), 60)
+  call test (f3 (ap), 60)
+  call test (f3 ((/ 5, 10, 50 /)), 120)
+  call test (f3 (a (101:103)), 30)
+
+  call test (f4 (a, 13, 1), 21)
+  call test (f4 (ap, 13, 2), 14)
+  call test (f4 ((/ 5, 10, 50 /), 12, 1), 60)
+  call test (f4 (a (101:103), 12, 1), 15)
+contains
+  function f1 (array)
+    integer, dimension (10:) :: array
+    character (len = sum (array)) :: f1
+    f1 = ''
+  end function f1
+
+  function f2 (array)
+    integer, dimension (10:) :: array
+    character (len = array (11) + a (104) + 100) :: f2
+    f2 = ''
+  end function f2
+
+  function f3 (array)
+    integer, dimension (:) :: array
+    character (len = sum (double (array (2:)))) :: f3
+    f3 = ''
+  end function f3
+
+  function f4 (array, upper, stride)
+    integer, dimension (10:) :: array
+    integer :: upper, stride
+    character (len = sum (array (lower:upper:stride))) :: f4
+    f4 = ''
+  end function f4
+
+  subroutine test (string, length)
+    character (len = *) :: string
+    integer, intent (in) :: length
+    if (len (string) .ne. length) call abort
+  end subroutine test
+end program main