[Patch, Fortran] PR 80121: Memory leak with derived-type intent(out) argument

[Janus Weil <janus at gcc dot gnu dot org>]

Hi all,

the patch in the attachment fixes a memory leak by auto-deallocating
the allocatable components of an allocatable intent(out) argument.

Regtests cleanly on x86_64-linux-gnu. Ok for trunk?

Cheers,
Janus


2017-04-22  Janus Weil  <janus@gcc.gnu.org>

    PR fortran/80121
    * trans-types.c (gfc_conv_procedure_call): Deallocate the components
    of allocatable intent(out) arguments.

2017-04-22  Janus Weil  <janus@gcc.gnu.org>

    PR fortran/80121
    * gfortran.dg/intent_out_9.f90: New test case.

Attachment: pr80121.diff
Description: Text document

! { dg-do compile }
! { dg-options "-fdump-tree-original" }
!
! PR 80121: Memory leak with derived-type intent(out) argument
!
! Contributed by Andrew Wood <andrew@fluidgravity.co.uk>

PROGRAM p
    IMPLICIT NONE
    TYPE t1
      INTEGER, ALLOCATABLE :: i(:)
    END TYPE
    call leak
  CONTAINS
    SUBROUTINE s1(e)
      TYPE(t1), ALLOCATABLE, INTENT(OUT) :: e(:)
      ALLOCATE( e(1) )
      ALLOCATE( e(1)%i(2) )
    END SUBROUTINE
    SUBROUTINE leak
      TYPE(t1), ALLOCATABLE :: e(:)
      CALL s1(e)
      CALL s1(e)
    END SUBROUTINE
END PROGRAM

! { dg-final { scan-tree-dump-times "__builtin_free" 6 "original" } }
! { dg-final { cleanup-tree-dump "original" } }