! RUN: bbc -emit-hlfir -fcuda -gpu=managed %s -o - | FileCheck %s

! Test -gpu=managed flag: allocatable arrays without explicit CUDA attributes
! should be implicitly treated as managed.

! -----------------------------------------------------------------------------
! Test 1: Basic allocatable without explicit attribute becomes managed
! -----------------------------------------------------------------------------
subroutine test_implicit_managed()
  real, allocatable :: a(:)
  allocate(a(100))
  a = 1.0
  deallocate(a)
end subroutine

! CHECK-LABEL: func.func @_QPtest_implicit_managed()
! CHECK: %[[BOX:.*]] = cuf.alloc !fir.box<!fir.heap<!fir.array<?xf32>>> {bindc_name = "a", data_attr = #cuf.cuda<managed>, uniq_name = "_QFtest_implicit_managedEa"}
! CHECK: fir.embox {{.*}} {allocator_idx = 3 : i32}
! CHECK: %[[BOX_DECL:.*]]:2 = hlfir.declare %[[BOX]] {data_attr = #cuf.cuda<managed>, fortran_attrs = #fir.var_attrs<allocatable>, uniq_name = "_QFtest_implicit_managedEa"}
! CHECK: cuf.allocate %[[BOX_DECL]]#0 : {{.*}} {data_attr = #cuf.cuda<managed>}
! CHECK: cuf.deallocate %[[BOX_DECL]]#0 : {{.*}} {data_attr = #cuf.cuda<managed>}
! CHECK: cuf.free %[[BOX_DECL]]#0 : {{.*}} {data_attr = #cuf.cuda<managed>}

! -----------------------------------------------------------------------------
! Test 2: Explicit device attribute is preserved (not overridden to managed)
! -----------------------------------------------------------------------------
subroutine test_explicit_device()
  real, allocatable, device :: d(:)
  allocate(d(100))
  deallocate(d)
end subroutine

! CHECK-LABEL: func.func @_QPtest_explicit_device()
! CHECK: %[[BOX:.*]] = cuf.alloc !fir.box<!fir.heap<!fir.array<?xf32>>> {bindc_name = "d", data_attr = #cuf.cuda<device>, uniq_name = "_QFtest_explicit_deviceEd"}
! CHECK: fir.embox {{.*}} {allocator_idx = 2 : i32}
! CHECK: %[[BOX_DECL:.*]]:2 = hlfir.declare %[[BOX]] {data_attr = #cuf.cuda<device>, fortran_attrs = #fir.var_attrs<allocatable>, uniq_name = "_QFtest_explicit_deviceEd"}
! CHECK: cuf.allocate %[[BOX_DECL]]#0 : {{.*}} {data_attr = #cuf.cuda<device>}

! -----------------------------------------------------------------------------
! Test 3: Explicit pinned attribute is preserved
! -----------------------------------------------------------------------------
subroutine test_explicit_pinned()
  real, allocatable, pinned :: p(:)
  allocate(p(100))
  deallocate(p)
end subroutine

! CHECK-LABEL: func.func @_QPtest_explicit_pinned()
! CHECK: %[[BOX:.*]] = cuf.alloc !fir.box<!fir.heap<!fir.array<?xf32>>> {bindc_name = "p", data_attr = #cuf.cuda<pinned>, uniq_name = "_QFtest_explicit_pinnedEp"}
! CHECK: fir.embox {{.*}} {allocator_idx = 1 : i32}
! CHECK: %[[BOX_DECL:.*]]:2 = hlfir.declare %[[BOX]] {data_attr = #cuf.cuda<pinned>, fortran_attrs = #fir.var_attrs<allocatable>, uniq_name = "_QFtest_explicit_pinnedEp"}

! -----------------------------------------------------------------------------
! Test 4: Explicit managed attribute is preserved (redundant but valid)
! -----------------------------------------------------------------------------
subroutine test_explicit_managed()
  real, allocatable, managed :: m(:)
  allocate(m(100))
  deallocate(m)
end subroutine

! CHECK-LABEL: func.func @_QPtest_explicit_managed()
! CHECK: %[[BOX:.*]] = cuf.alloc !fir.box<!fir.heap<!fir.array<?xf32>>> {bindc_name = "m", data_attr = #cuf.cuda<managed>, uniq_name = "_QFtest_explicit_managedEm"}
! CHECK: fir.embox {{.*}} {allocator_idx = 3 : i32}
! CHECK: %[[BOX_DECL:.*]]:2 = hlfir.declare %[[BOX]] {data_attr = #cuf.cuda<managed>, fortran_attrs = #fir.var_attrs<allocatable>, uniq_name = "_QFtest_explicit_managedEm"}

! -----------------------------------------------------------------------------
! Test 5: Pointer variables are NOT affected by -gpu=managed
! -----------------------------------------------------------------------------
subroutine test_pointer_not_managed()
  real, pointer :: ptr(:)
  allocate(ptr(100))
  ptr = 1.0
  deallocate(ptr)
end subroutine

! CHECK-LABEL: func.func @_QPtest_pointer_not_managed()
! CHECK: %[[BOX:.*]] = fir.alloca !fir.box<!fir.ptr<!fir.array<?xf32>>> {bindc_name = "ptr", uniq_name = "_QFtest_pointer_not_managedEptr"}
! CHECK-NOT: data_attr = #cuf.cuda<managed>
! CHECK: %[[BOX_DECL:.*]]:2 = hlfir.declare %[[BOX]] {fortran_attrs = #fir.var_attrs<pointer>, uniq_name = "_QFtest_pointer_not_managedEptr"}
! CHECK: fir.call @_FortranAPointerAllocate

! -----------------------------------------------------------------------------
! Test 6: Multiple allocatables - mix of implicit and explicit
! -----------------------------------------------------------------------------
subroutine test_mixed_allocatables()
  real, allocatable :: a(:)           ! Should become managed
  real, allocatable, device :: d(:)   ! Should stay device
  real, allocatable, pinned :: p(:)   ! Should stay pinned
  real, allocatable, managed :: m(:)  ! Should stay managed (explicit)

  allocate(a(10), d(10), p(10), m(10))
  deallocate(a, d, p, m)
end subroutine

! CHECK-LABEL: func.func @_QPtest_mixed_allocatables()
! CHECK: cuf.alloc {{.*}} {bindc_name = "a", data_attr = #cuf.cuda<managed>, uniq_name = "_QFtest_mixed_allocatablesEa"}
! CHECK: cuf.alloc {{.*}} {bindc_name = "d", data_attr = #cuf.cuda<device>, uniq_name = "_QFtest_mixed_allocatablesEd"}
! CHECK: cuf.alloc {{.*}} {bindc_name = "m", data_attr = #cuf.cuda<managed>, uniq_name = "_QFtest_mixed_allocatablesEm"}
! CHECK: cuf.alloc {{.*}} {bindc_name = "p", data_attr = #cuf.cuda<pinned>, uniq_name = "_QFtest_mixed_allocatablesEp"}

! -----------------------------------------------------------------------------
! Test 7: Multi-dimensional allocatable array
! -----------------------------------------------------------------------------
subroutine test_multidim()
  real, allocatable :: arr(:,:,:)
  allocate(arr(10,20,30))
  arr = 0.0
  deallocate(arr)
end subroutine

! CHECK-LABEL: func.func @_QPtest_multidim()
! CHECK: cuf.alloc {{.*}} {bindc_name = "arr", data_attr = #cuf.cuda<managed>, uniq_name = "_QFtest_multidimEarr"}
! CHECK: fir.embox {{.*}} {allocator_idx = 3 : i32}

! -----------------------------------------------------------------------------
! Test 8: Explicit unified attribute is preserved (not overridden to managed)
! -----------------------------------------------------------------------------
subroutine test_explicit_unified()
  real, allocatable, unified :: u(:)
  allocate(u(100))
  deallocate(u)
end subroutine

! CHECK-LABEL: func.func @_QPtest_explicit_unified()
! CHECK: cuf.alloc {{.*}} {bindc_name = "u", data_attr = #cuf.cuda<unified>, uniq_name = "_QFtest_explicit_unifiedEu"}
! CHECK: hlfir.declare {{.*}} {data_attr = #cuf.cuda<unified>, fortran_attrs = #fir.var_attrs<allocatable>

! -----------------------------------------------------------------------------
! Test 9: Dummy arguments - allocatable dummy without explicit attribute
! -----------------------------------------------------------------------------
subroutine test_dummy_allocatable(arr)
  real, allocatable, intent(inout) :: arr(:)
  if (.not. allocated(arr)) allocate(arr(100))
  arr = 1.0
end subroutine

! CHECK-LABEL: func.func @_QPtest_dummy_allocatable(
! CHECK-SAME: %{{.*}}: !fir.ref<!fir.box<!fir.heap<!fir.array<?xf32>>>> {cuf.data_attr = #cuf.cuda<managed>, fir.bindc_name = "arr"})
! CHECK: hlfir.declare {{.*}} {data_attr = #cuf.cuda<managed>, fortran_attrs = #fir.var_attrs<allocatable, intent_inout>

! -----------------------------------------------------------------------------
! Test 10: Module variables - allocatable module variable becomes managed
! -----------------------------------------------------------------------------
module mod_globals
  real, allocatable :: global_arr(:)
  real, allocatable, device :: global_device(:)
end module

subroutine test_module_var()
  use mod_globals
  allocate(global_arr(50))
  allocate(global_device(50))
  deallocate(global_arr)
  deallocate(global_device)
end subroutine

! CHECK-LABEL: func.func @_QPtest_module_var()
! CHECK: cuf.allocate {{.*}} {data_attr = #cuf.cuda<managed>, hasDoubleDescriptor}
! CHECK: cuf.allocate {{.*}} {data_attr = #cuf.cuda<device>, hasDoubleDescriptor}

! CHECK: fir.global @_QMmod_globalsEglobal_arr {data_attr = #cuf.cuda<managed>} : !fir.box<!fir.heap<!fir.array<?xf32>>>
! CHECK: fir.embox {{.*}} {allocator_idx = 3 : i32}

! CHECK: fir.global @_QMmod_globalsEglobal_device {data_attr = #cuf.cuda<device>} : !fir.box<!fir.heap<!fir.array<?xf32>>>
! CHECK: fir.embox {{.*}} {allocator_idx = 2 : i32}