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llvm/flang/test/Lower/derived-type-finalization.f90 

! Test derived type finalization
! RUN: bbc --use-desc-for-alloc=false -emit-fir -hlfir=false %s -o - | FileCheck %s

! Missing tests:
! - finalization within BLOCK construct

module derived_type_finalization

  type :: t1
    integer :: a
  contains
    final :: t1_final
    final :: t1_final_1r
  end type

  type :: t2
    integer, allocatable, dimension(:) :: a
  contains
    final :: t2_final
  end type

  type :: t3
    type(t2) :: t
  end type

  type t4
  contains
    final :: t4_final
  end type

contains

  subroutine t1_final(this)
    type(t1) :: this
  end subroutine

  subroutine t1_final_1r(this)
    type(t1) :: this(:)
  end subroutine

  subroutine t2_final(this)
    type(t2) :: this
  end subroutine

  ! 7.5.6.3 point 1. Finalization of LHS.
  subroutine test_lhs()
    type(t1) :: lhs, rhs
    lhs = rhs
  end subroutine

  subroutine test_lhs_allocatable()
    type(t1), allocatable :: lhs
    type(t1) :: rhs
    lhs = rhs
  end subroutine

! CHECK-LABEL: func.func @_QMderived_type_finalizationPtest_lhs() {
! CHECK: %[[BOXREF:.*]] = fir.alloca !fir.box<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>
! CHECK: %[[LHS:.*]] = fir.alloca !fir.type<_QMderived_type_finalizationTt1{a:i32}> {bindc_name = "lhs", uniq_name = "_QMderived_type_finalizationFtest_lhsElhs"}
! CHECK: %[[EMBOX:.*]] = fir.embox %[[LHS]] : (!fir.ref<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>) -> !fir.box<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>
! CHECK: fir.store %[[EMBOX]] to %[[BOXREF]] : !fir.ref<!fir.box<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>>
! CHECK: %[[BOX_NONE:.*]] = fir.convert %[[BOXREF]] : (!fir.ref<!fir.box<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>>) -> !fir.ref<!fir.box<none>>
! CHECK: %{{.*}} = fir.call @_FortranAAssign(%[[BOX_NONE]], {{.*}}

! CHECK-LABEL: func.func @_QMderived_type_finalizationPtest_lhs_allocatable() {
! CHECK: %[[LHS:.*]] = fir.alloca !fir.box<!fir.heap<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>> {bindc_name = "lhs", uniq_name = "_QMderived_type_finalizationFtest_lhs_allocatableElhs"}
! CHECK: %[[LHS_ADDR:.*]] = fir.alloca !fir.heap<!fir.type<_QMderived_type_finalizationTt1{a:i32}>> {uniq_name = "_QMderived_type_finalizationFtest_lhs_allocatableElhs.addr"}
! CHECK: %[[RHS:.*]] = fir.alloca !fir.type<_QMderived_type_finalizationTt1{a:i32}> {bindc_name = "rhs", uniq_name = "_QMderived_type_finalizationFtest_lhs_allocatableErhs"}
! CHECK: %[[LHS_ADDR_LOAD:.*]] = fir.load %[[LHS_ADDR]] : !fir.ref<!fir.heap<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>>
! CHECK: %[[ADDR_I64:.*]] = fir.convert %[[LHS_ADDR_LOAD]] : (!fir.heap<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>) -> i64
! CHECK: %[[C0:.*]] = arith.constant 0 : i64
! CHECK: %[[IS_NULL:.*]] = arith.cmpi ne, %[[ADDR_I64]], %[[C0]] : i64
! CHECK: fir.if %[[IS_NULL]] {
! CHECK:   %[[BOX_NONE:.*]] = fir.convert %[[LHS]] : (!fir.ref<!fir.box<!fir.heap<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>>>) -> !fir.box<none>
! CHECK:   %{{.*}} = fir.call @_FortranADestroy(%[[BOX_NONE]]) {{.*}} : (!fir.box<none>) -> none
! CHECK: }

  ! 7.5.6.3 point 2. Finalization on explicit deallocation.
  subroutine test_deallocate()
    type(t1), allocatable :: t
    allocate(t)
    deallocate(t)
  end subroutine

! CHECK-LABEL: func.func @_QMderived_type_finalizationPtest_deallocate() {
! CHECK: %[[LOCAL_T:.*]] = fir.alloca !fir.box<!fir.heap<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>> {bindc_name = "t", uniq_name = "_QMderived_type_finalizationFtest_deallocateEt"}
! CHECK: %{{.*}} = fir.call @_FortranAAllocatableAllocate
! CHECK: %[[BOX_NONE:.*]] = fir.convert %[[LOCAL_T]] : (!fir.ref<!fir.box<!fir.heap<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>>>) -> !fir.ref<!fir.box<none>>
! CHECK: %{{.*}} = fir.call @_FortranAAllocatableDeallocate(%[[BOX_NONE]], %{{.*}}, %{{.*}}, %{{.*}}, %{{.*}}) {{.*}} : (!fir.ref<!fir.box<none>>, i1, !fir.box<none>, !fir.ref<i8>, i32) -> i32

  ! 7.5.6.3 point 2. Finalization of disassociated target.
  subroutine test_target_finalization()
    type(t1), pointer :: p
    allocate(p, source=t1(a=2))
    deallocate(p)
  end subroutine

! CHECK-LABEL: func.func @_QMderived_type_finalizationPtest_target_finalization() {
! CHECK: %[[P:.*]] = fir.alloca !fir.box<!fir.ptr<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>> {bindc_name = "p", uniq_name = "_QMderived_type_finalizationFtest_target_finalizationEp"}
! CHECK: fir.call @_FortranAInitialize
! CHECK: fir.call @_FortranAPointerAllocateSource
! CHECK: %[[P_BOX_NONE:.*]] = fir.convert %[[P]] : (!fir.ref<!fir.box<!fir.ptr<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>>>) -> !fir.ref<!fir.box<none>>
! CHECK: %{{.*}} = fir.call @_FortranAPointerDeallocate(%[[P_BOX_NONE]], %{{.*}}, %{{.*}}, %{{.*}}, %{{.*}}) {{.*}} : (!fir.ref<!fir.box<none>>, i1, !fir.box<none>, !fir.ref<i8>, i32) -> i32

  ! 7.5.6.3 point 3. Finalize on END.
  subroutine test_end_finalization()
    type(t1) :: t
  end subroutine

! CHECK-LABEL: func.func @_QMderived_type_finalizationPtest_end_finalization() {
! CHECK: %[[LOCAL_T:.*]] = fir.alloca !fir.type<_QMderived_type_finalizationTt1{a:i32}> {bindc_name = "t", uniq_name = "_QMderived_type_finalizationFtest_end_finalizationEt"}
! CHECK: %[[EMBOX:.*]] = fir.embox %[[LOCAL_T]] : (!fir.ref<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>) -> !fir.box<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>
! CHECK: %[[BOX_NONE:.*]] = fir.convert %[[EMBOX]] : (!fir.box<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>) -> !fir.box<none>
! CHECK: %{{.*}} = fir.call @_FortranADestroy(%[[BOX_NONE]]) {{.*}} : (!fir.box<none>) -> none
! CHECK: return

  ! test with multiple return.
  subroutine test_end_finalization2(a)
    type(t1) :: t
    logical :: a
    if (a) return
    t%a = 10
  end subroutine

! CHECK-LABEL: func.func @_QMderived_type_finalizationPtest_end_finalization2(
! CHECK-SAME: %[[A:.*]]: !fir.ref<!fir.logical<4>> {fir.bindc_name = "a"}) {
! CHECK:   %[[T:.*]] = fir.alloca !fir.type<_QMderived_type_finalizationTt1{a:i32}> {bindc_name = "t", uniq_name = "_QMderived_type_finalizationFtest_end_finalization2Et"}
! CHECK:   %[[LOAD_A:.*]] = fir.load %[[A]] : !fir.ref<!fir.logical<4>>
! CHECK:   %[[CONV_A:.*]] = fir.convert %[[LOAD_A]] : (!fir.logical<4>) -> i1
! CHECK:   cf.cond_br %[[CONV_A]], ^bb1, ^bb2
! CHECK: ^bb1:
! CHECK:   cf.br ^bb3
! CHECK: ^bb2:
! CHECK:   %[[C10:.*]] = arith.constant 10 : i32
! CHECK:   %[[FIELD_A:.*]] = fir.field_index a, !fir.type<_QMderived_type_finalizationTt1{a:i32}>
! CHECK:   %[[COORD_A:.*]] = fir.coordinate_of %[[T]], %[[FIELD_A]] : (!fir.ref<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>, !fir.field) -> !fir.ref<i32>
! CHECK:   fir.store %[[C10]] to %[[COORD_A]] : !fir.ref<i32>
! CHECK:   cf.br ^bb3
! CHECK: ^bb3:
! CHECK:   %[[EMBOX:.*]] = fir.embox %[[T]] : (!fir.ref<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>) -> !fir.box<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>
! CHECK:   %[[BOX_NONE:.*]] = fir.convert %[[EMBOX]] : (!fir.box<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>) -> !fir.box<none>
! CHECK:   %{{.*}} = fir.call @_FortranADestroy(%[[BOX_NONE]]) {{.*}} : (!fir.box<none>) -> none
! CHECK:   return
! CHECK: }

  function ret_type() result(ty)
    type(t1) :: ty
  end function

  ! 7.5.6.3 point 5. Finalization of a function reference on the RHS of an intrinsic assignment.
  subroutine test_fct_ref()
    type(t1), allocatable :: ty
    ty = ret_type()
  end subroutine

! CHECK-LABEL: func.func @_QMderived_type_finalizationPtest_fct_ref() {
! CHECK: %[[RESULT:.*]] = fir.alloca !fir.type<_QMderived_type_finalizationTt1{a:i32}> {bindc_name = ".result"}
! CHECK: %[[CALL_RES:.*]] = fir.call @_QMderived_type_finalizationPret_type()
! CHECK: fir.save_result %[[CALL_RES]] to %[[RESULT]] : !fir.type<_QMderived_type_finalizationTt1{a:i32}>, !fir.ref<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>
! CHECK: %[[EMBOX:.*]] = fir.embox %[[RESULT]] : (!fir.ref<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>) -> !fir.box<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>
! CHECK: %[[BOX_NONE:.*]] = fir.convert %[[EMBOX]] : (!fir.box<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>) -> !fir.box<none>
! CHECK: %{{.*}} = fir.call @_FortranADestroy(%[[BOX_NONE]]) {{.*}} : (!fir.box<none>) -> none
! CHECK: return

  subroutine test_finalize_intent_out(t)
    type(t1), intent(out) :: t
  end subroutine

! CHECK-LABEL: func.func @_QMderived_type_finalizationPtest_finalize_intent_out(
! CHECK-SAME: %[[T:.*]]: !fir.ref<!fir.type<_QMderived_type_finalizationTt1{a:i32}>> {fir.bindc_name = "t"}) {
! CHECK: %[[EMBOX:.*]] = fir.embox %[[T]] : (!fir.ref<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>) -> !fir.box<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>
! CHECK: %[[BOX_NONE:.*]] = fir.convert %[[EMBOX]] : (!fir.box<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>) -> !fir.box<none>
! CHECK: %{{.*}} = fir.call @_FortranADestroy(%[[BOX_NONE]]) {{.*}}: (!fir.box<none>) -> none
! CHECK: return

  function get_t1(i)
    type(t1), pointer :: get_t1
    allocate(get_t1)
    get_t1%a = i
  end function

  subroutine test_nonpointer_function()
    print*, get_t1(20)
  end subroutine

! CHECK-LABEL: func.func @_QMderived_type_finalizationPtest_nonpointer_function() {
! CHECK: %[[TMP:.*]] = fir.alloca !fir.box<!fir.ptr<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>> {bindc_name = ".result"}
! CHECK: %{{.*}} = fir.call @_FortranAioBeginExternalListOutput
! CHECK: %[[RES:.*]] = fir.call @_QMderived_type_finalizationPget_t1(%{{.*}}) {{.*}} : (!fir.ref<i32>) -> !fir.box<!fir.ptr<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>>
! CHECK: fir.save_result %[[RES]] to %[[TMP]] : !fir.box<!fir.ptr<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>>, !fir.ref<!fir.box<!fir.ptr<!fir.type<_QMderived_type_finalizationTt1{a:i32}>>>>
! CHECK: %{{.*}} = fir.call @_FortranAioOutputDerivedType
! CHECK-NOT: %{{.*}} = fir.call @_FortranADestroy
! CHECK: %{{.*}} = fir.call @_FortranAioEndIoStatement
! CHECK: return

  subroutine test_avoid_double_finalization(a)
    type(t3), intent(inout) :: a
    type(t3)                :: b
    b = a
  end subroutine

! CHECK-LABEL: func.func @_QMderived_type_finalizationPtest_avoid_double_finalization(
! CHECK: fir.call @_FortranAInitialize(
! CHECK-NOT: %{{.*}} = fir.call @_FortranADestroy
! CHECK: %{{.*}} = fir.call @_FortranAAssign(
! CHECK: %{{.*}} = fir.call @_FortranADestroy(

  function no_func_ret_finalize() result(ty)
    type(t1) :: ty
    ty = t1(10)
  end function

! CHECK-LABEL: func.func @_QMderived_type_finalizationPno_func_ret_finalize() -> !fir.type<_QMderived_type_finalizationTt1{a:i32}> {
! CHECK: %{{.*}} = fir.call @_FortranAAssign
! CHECK-NOT: fir.call @_FortranADestroy
! CHECK: return %{{.*}} : !fir.type<_QMderived_type_finalizationTt1{a:i32}>

  function copy(a) result(ty)
    class(t1), allocatable :: ty(:)
    integer, intent(in) :: a
    allocate(t1::ty(a))
    ty%a = 1
  end function

  subroutine test_avoid_double_free()
    class(*), allocatable :: up(:)
    allocate(up(10), source=copy(10))
  end subroutine

! CHECK-LABEL: func.func @_QMderived_type_finalizationPtest_avoid_double_free() {
! CHECK: %[[RES:.*]] = fir.alloca !fir.class<!fir.heap<!fir.array<?x!fir.type<_QMderived_type_finalizationTt1{a:i32}>>>> {bindc_name = ".result"}
! CHECK: fir.call @_FortranAAllocatableAllocateSource(
! CHECK-NOT: fir.freemem %{{.*}} : !fir.heap<!fir.array<?x!fir.type<_QMderived_type_finalizationTt1{a:i32}>>>
! CHECK: %[[RES_CONV:.*]] = fir.convert %[[RES]] : (!fir.ref<!fir.class<!fir.heap<!fir.array<?x!fir.type<_QMderived_type_finalizationTt1{a:i32}>>>>>) -> !fir.box<none>
! CHECK: %{{.*}} = fir.call @_FortranADestroy(%[[RES_CONV]]) {{.*}} : (!fir.box<none>) -> none

  subroutine t4_final(this)
    type(t4) :: this
  end subroutine

  subroutine local_t4()
    type(t4) :: t
  end subroutine

! CHECK-LABEL: func.func @_QMderived_type_finalizationPlocal_t4()
! CHECK: %{{.*}} = fir.call @_FortranADestroy(%2) fastmath<contract> : (!fir.box<none>) -> none

end module

program p
  use derived_type_finalization
  type(t1) :: t
end program

! CHECK-LABEL: func.func @_QQmain() attributes {fir.bindc_name = "p"} {
! CHECK-NOT: fir.call @_FortranADestroy