gcc/testsuite/gfortran.dg/intent_optimize_8.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 associate variables.
   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 :: c1, c2
  23
  24   c1 = 123456789
  25   associate (d1 => c1)
  26     call foo(d1)
  27     if (d1 /= 42) stop 1
  28   end associate
  29   if (c1 /= 42) stop 2
  30
  31   c2 = 0
  32   associate (d2 => c2)
  33     d2 = 987654321
  34     call foo(d2)
  35     if (d2 /= 42) stop 3
  36   end associate
  37   if (c2 /= 42) stop 4
  38
  39 end program main
  40
  41 ! { dg-final { scan-tree-dump-times "CLOBBER" 2 "original" } }
  42 ! { dg-final { scan-tree-dump "d1 = {CLOBBER};" "original" } }
  43 ! { dg-final { scan-tree-dump "\\*d2 = {CLOBBER};" "original" } }
  44 ! { dg-final { scan-tree-dump-not "123456789" "optimized" { target __OPTIMIZE__ } } }
  45 ! { dg-final { scan-tree-dump-not "987654321" "optimized" { target __OPTIMIZE__ } } }