gcc/testsuite/gfortran.dg/aliasing_dummy_5.f90

   1 ! { dg-do run }
   2 !
   3 ! PR fortran/45019
   4 !
   5 ! Check that the compiler knows that
   6 ! "arg" and "arr" can alias.
   7 !
   8 MODULE m
   9   IMPLICIT NONE
  10   INTEGER, TARGET :: arr(3)
  11 CONTAINS
  12   SUBROUTINE foobar (arg)
  13     INTEGER, TARGET :: arg(:)
  14     arr(2:3) = arg(1:2)
  15   END SUBROUTINE foobar
  16 END MODULE m
  17
  18 PROGRAM main
  19   USE m
  20   IMPLICIT NONE
  21   arr = (/ 1, 2, 3 /)
  22   CALL bar(arr)
  23   if (any (arr /= (/ 1, 1, 2 /))) STOP 1
  24   CALL test()
  25 contains
  26   subroutine bar(x)
  27     INTEGER, TARGET :: x(:)
  28     CALL foobar (x)
  29   end subroutine bar
  30 END PROGRAM main
  31
  32 MODULE m2
  33   IMPLICIT NONE
  34   INTEGER, TARGET :: arr(3)
  35 CONTAINS
  36    SUBROUTINE foobar (arg)
  37     INTEGER, TARGET :: arg(:)
  38     arr(1) = 5
  39     arg(1) = 6
  40     if (arr(1) == 5) STOP 2
  41   END SUBROUTINE foobar
  42 END MODULE m2
  43 subroutine test
  44   USE m2
  45   IMPLICIT NONE
  46   arr = (/ 1, 2, 3 /)
  47   CALL bar(arr)
  48 contains
  49    subroutine bar(x)
  50     INTEGER, TARGET :: x(:)
  51     CALL foobar (x)
  52   end subroutine bar
  53 END subroutine test