gcc/testsuite/gfortran.dg/intent_optimize_9.f90

   1 ! { dg-do run }
   2 ! { dg-additional-options "-fno-inline -fno-ipa-modref -fdump-tree-optimized -fdump-tree-original" }
   3 !
   4 ! PR fortran/41453
   5 ! Check that the INTENT(OUT) attribute causes one clobber to be emitted in
   6 ! the caller before each call to FOO in the *.original dump, and the
   7 ! initialization constants to be optimized away in the *.optimized dump,
   8 ! in the case of scalar allocatables and pointers.
   9
  10 module x
  11 implicit none
  12 contains
  13   subroutine foo(a)
  14     integer, intent(out) :: a
  15     a = 42
  16   end subroutine foo
  17 end module x
  18
  19 program main
  20   use x
  21   implicit none
  22   integer, allocatable :: ca
  23   integer, target :: ct
  24   integer, pointer :: cp
  25
  26   allocate(ca)
  27   ca = 123456789
  28   call foo(ca)
  29   if (ca /= 42) stop 1
  30   deallocate(ca)
  31
  32   ct = 987654321
  33   cp => ct
  34   call foo(cp)
  35   if (ct /= 42) stop 2
  36 end program main
  37
  38 ! { dg-final { scan-tree-dump-times "CLOBBER" 2 "original" } }
  39 ! { dg-final { scan-tree-dump "\\*ca = {CLOBBER};" "original" } }
  40 ! { dg-final { scan-tree-dump "\\*cp = {CLOBBER};" "original" } }
  41 ! { dg-final { scan-tree-dump-not "123456789" "optimized" { target __OPTIMIZE__ } } }
  42 ! { dg-final { scan-tree-dump-not "987654321" "optimized" { target __OPTIMIZE__ } } }