gcc/testsuite/gfortran.dg/intent_optimize_6.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 constant to be optimized away in the *.optimized dump,
   8 ! in the case of an argument passed by reference to the caller.
   9
  10 module x
  11 implicit none
  12 contains
  13   subroutine foo(a)
  14     integer(kind=4), intent(out) :: a
  15     a = 42
  16   end subroutine foo
  17   subroutine bar(b)
  18     integer(kind=4) :: b
  19     b = 123456789
  20     call foo(b)
  21   end subroutine bar
  22 end module x
  23
  24 program main
  25   use x
  26   implicit none
  27   integer(kind=4) :: c
  28   call bar(c)
  29   if (c /= 42) stop 1
  30 end program main
  31
  32 ! { dg-final { scan-tree-dump-times "CLOBBER" 1 "original" } }
  33 ! { dg-final { scan-tree-dump "\\*\\\(integer\\\(kind=4\\\) \\*\\\) b = {CLOBBER};" "original" } }
  34 ! { dg-final { scan-tree-dump-not "123456789" "optimized" { target __OPTIMIZE__ } } }