flang/test/Lower/pointer-disassociate.f90

   1 ! Test lowering of pointer disassociation
   2 ! RUN: bbc -emit-fir -hlfir=false %s -o - | FileCheck %s
   3
   4
   5 ! -----------------------------------------------------------------------------
   6 !     Test p => NULL()
   7 ! -----------------------------------------------------------------------------
   8
   9
  10 ! CHECK-LABEL: func @_QPtest_scalar(
  11 ! CHECK-SAME: %[[p:.*]]: !fir.ref<!fir.box<!fir.ptr<f32>>>{{.*}})
  12 subroutine test_scalar(p)
  13   real, pointer :: p
  14   ! CHECK: %[[null:.*]] = fir.zero_bits !fir.ptr<f32>
  15   ! CHECK: %[[box:.*]] = fir.embox %[[null]] : (!fir.ptr<f32>) -> !fir.box<!fir.ptr<f32>>
  16   ! CHECK: fir.store %[[box]] to %[[p]] : !fir.ref<!fir.box<!fir.ptr<f32>>>
  17   p => NULL()
  18 end subroutine
  19
  20 ! CHECK-LABEL: func @_QPtest_scalar_char(
  21 ! CHECK-SAME: %[[p:.*]]: !fir.ref<!fir.box<!fir.ptr<!fir.char<1,?>>>>{{.*}})
  22 subroutine test_scalar_char(p)
  23   character(:), pointer :: p
  24   ! CHECK: %[[null:.*]] = fir.zero_bits !fir.ptr<!fir.char<1,?>>
  25   ! CHECK: %[[box:.*]] = fir.embox %[[null]] typeparams %c0{{.*}} : (!fir.ptr<!fir.char<1,?>>, index) -> !fir.box<!fir.ptr<!fir.char<1,?>>>
  26   ! CHECK: fir.store %[[box]] to %[[p]] : !fir.ref<!fir.box<!fir.ptr<!fir.char<1,?>>>>
  27   p => NULL()
  28 end subroutine
  29
  30 ! CHECK-LABEL: func @_QPtest_array(
  31 ! CHECK-SAME: %[[p:.*]]: !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>{{.*}})
  32 subroutine test_array(p)
  33   real, pointer :: p(:)
  34   ! CHECK: %[[null:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xf32>>
  35   ! CHECK: %[[shape:.*]] = fir.shape %c0{{.*}}
  36   ! CHECK: %[[box:.*]] = fir.embox %[[null]](%[[shape]]) : (!fir.ptr<!fir.array<?xf32>>, !fir.shape<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
  37   ! CHECK: fir.store %[[box]] to %[[p]] : !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>
  38   p => NULL()
  39 end subroutine
  40
  41 ! Test p(lb, ub) => NULL() which is none sens but is not illegal.
  42 ! CHECK-LABEL: func @_QPtest_array_remap(
  43 ! CHECK-SAME: %[[p:.*]]: !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>{{.*}})
  44 subroutine test_array_remap(p)
  45   real, pointer :: p(:)
  46   ! CHECK: %[[null:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xf32>>
  47   ! CHECK: %[[shape:.*]] = fir.shape %c0{{.*}}
  48   ! CHECK: %[[box:.*]] = fir.embox %[[null]](%[[shape]]) : (!fir.ptr<!fir.array<?xf32>>, !fir.shape<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
  49   ! CHECK: fir.store %[[box]] to %[[p]] : !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>
  50   p(10:20) => NULL()
  51 end subroutine
  52
  53 ! -----------------------------------------------------------------------------
  54 !     Test p => NULL(MOLD)
  55 ! -----------------------------------------------------------------------------
  56
  57 ! CHECK-LABEL: func @_QPtest_scalar_mold(
  58 ! CHECK-SAME: %[[p:.*]]: !fir.ref<!fir.box<!fir.ptr<f32>>>{{[^,]*}},
  59 subroutine test_scalar_mold(p, x)
  60   real, pointer :: p, x
  61   ! CHECK: %[[VAL_0:.*]] = fir.alloca !fir.box<!fir.ptr<f32>>
  62   ! CHECK: %[[VAL_1:.*]] = fir.zero_bits !fir.ptr<f32>
  63   ! CHECK: %[[VAL_2:.*]] = fir.embox %[[VAL_1]] : (!fir.ptr<f32>) -> !fir.box<!fir.ptr<f32>>
  64   ! CHECK: fir.store %[[VAL_2]] to %[[VAL_0]] : !fir.ref<!fir.box<!fir.ptr<f32>>>
  65   ! CHECK: %[[VAL_3:.*]] = fir.load %[[VAL_0]] : !fir.ref<!fir.box<!fir.ptr<f32>>>
  66   ! CHECK: %[[VAL_4:.*]] = fir.box_addr %[[VAL_3]] : (!fir.box<!fir.ptr<f32>>) -> !fir.ptr<f32>
  67   ! CHECK: %[[VAL_5:.*]] = fir.embox %[[VAL_4]] : (!fir.ptr<f32>) -> !fir.box<!fir.ptr<f32>>
  68   ! CHECK: fir.store %[[VAL_5]] to %[[p]] : !fir.ref<!fir.box<!fir.ptr<f32>>>
  69   p => NULL(x)
  70 end subroutine
  71
  72 ! CHECK-LABEL: func @_QPtest_scalar_char_mold(
  73 ! CHECK-SAME: %[[p:.*]]: !fir.ref<!fir.box<!fir.ptr<!fir.char<1,?>>>>{{[^,]*}},
  74 subroutine test_scalar_char_mold(p, x)
  75   character(:), pointer :: p, x
  76   ! CHECK: %[[VAL_7:.*]] = fir.alloca !fir.box<!fir.ptr<!fir.char<1,?>>>
  77   ! CHECK: %[[VAL_8:.*]] = fir.zero_bits !fir.ptr<!fir.char<1,?>>
  78   ! CHECK: %[[VAL_9:.*]] = arith.constant 0 : index
  79   ! CHECK: %[[VAL_10:.*]] = fir.embox %[[VAL_8]] typeparams %[[VAL_9]] : (!fir.ptr<!fir.char<1,?>>, index) -> !fir.box<!fir.ptr<!fir.char<1,?>>>
  80   ! CHECK: fir.store %[[VAL_10]] to %[[VAL_7]] : !fir.ref<!fir.box<!fir.ptr<!fir.char<1,?>>>>
  81   ! CHECK: %[[VAL_11:.*]] = fir.load %[[VAL_7]] : !fir.ref<!fir.box<!fir.ptr<!fir.char<1,?>>>>
  82   ! CHECK: %[[VAL_12:.*]] = fir.box_elesize %[[VAL_11]] : (!fir.box<!fir.ptr<!fir.char<1,?>>>) -> index
  83   ! CHECK: %[[VAL_13:.*]] = fir.box_addr %[[VAL_11]] : (!fir.box<!fir.ptr<!fir.char<1,?>>>) -> !fir.ptr<!fir.char<1,?>>
  84   ! CHECK: %[[VAL_14:.*]] = fir.embox %[[VAL_13]] typeparams %[[VAL_12]] : (!fir.ptr<!fir.char<1,?>>, index) -> !fir.box<!fir.ptr<!fir.char<1,?>>>
  85   ! CHECK: fir.store %[[VAL_14]] to %[[p]] : !fir.ref<!fir.box<!fir.ptr<!fir.char<1,?>>>>
  86   p => NULL(x)
  87 end subroutine
  88
  89 ! CHECK-LABEL: func @_QPtest_array_mold(
  90 ! CHECK-SAME: %[[p:.*]]: !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>{{[^,]*}},
  91 subroutine test_array_mold(p, x)
  92   real, pointer :: p(:), x(:)
  93   ! CHECK: %[[VAL_0:.*]] = fir.alloca !fir.box<!fir.ptr<!fir.array<?xf32>>>
  94   ! CHECK: %[[VAL_1:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xf32>>
  95   ! CHECK: %[[VAL_2:.*]] = arith.constant 0 : index
  96   ! CHECK: %[[VAL_3:.*]] = fir.shape %[[VAL_2]] : (index) -> !fir.shape<1>
  97   ! CHECK: %[[VAL_4:.*]] = fir.embox %[[VAL_1]](%[[VAL_3]]) : (!fir.ptr<!fir.array<?xf32>>, !fir.shape<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
  98   ! CHECK: fir.store %[[VAL_4]] to %[[VAL_0]] : !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>
  99   ! CHECK: %[[VAL_5:.*]] = fir.load %[[VAL_0]] : !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>
 100   ! CHECK: %[[VAL_6:.*]] = arith.constant 0 : index
 101   ! CHECK: %[[VAL_7:.*]]:3 = fir.box_dims %[[VAL_5]], %[[VAL_6]] : (!fir.box<!fir.ptr<!fir.array<?xf32>>>, index) -> (index, index, index)
 102   ! CHECK: %[[VAL_8:.*]] = fir.shift %[[VAL_7]]#0 : (index) -> !fir.shift<1>
 103   ! CHECK: %[[VAL_9:.*]] = fir.rebox %[[VAL_5]](%[[VAL_8]]) : (!fir.box<!fir.ptr<!fir.array<?xf32>>>, !fir.shift<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
 104   ! CHECK: fir.store %[[VAL_9]] to %[[p]] : !fir.ref<!fir.box<!fir.ptr<!fir.array<?xf32>>>>
 105   p => NULL(x)
 106 end subroutine
 107
 108 subroutine test_polymorphic_null(p)
 109   type t
 110   end type
 111   class(t), pointer :: p(:)
 112   p => null()
 113 end subroutine
 114 ! CHECK-LABEL:   func.func @_QPtest_polymorphic_null(
 115 ! CHECK-SAME:  %[[VAL_0:.*]]: !fir.ref<!fir.class<!fir.ptr<!fir.array<?x!fir.type<_QFtest_polymorphic_nullTt>>>>>
 116 ! CHECK:  %[[VAL_1:.*]] = fir.type_desc !fir.type<_QFtest_polymorphic_nullTt>
 117 ! CHECK:  %[[VAL_2:.*]] = fir.convert %[[VAL_0]] : (!fir.ref<!fir.class<!fir.ptr<!fir.array<?x!fir.type<_QFtest_polymorphic_nullTt>>>>>) -> !fir.ref<!fir.box<none>>
 118 ! CHECK:  %[[VAL_3:.*]] = fir.convert %[[VAL_1]] : (!fir.tdesc<!fir.type<_QFtest_polymorphic_nullTt>>) -> !fir.ref<none>
 119 ! CHECK:  %[[VAL_4:.*]] = arith.constant 1 : i32
 120 ! CHECK:  %[[VAL_5:.*]] = arith.constant 0 : i32
 121 ! CHECK:  %[[VAL_6:.*]] = fir.call @_FortranAPointerNullifyDerived(%[[VAL_2]], %[[VAL_3]], %[[VAL_4]], %[[VAL_5]]) {{.*}}: (!fir.ref<!fir.box<none>>, !fir.ref<none>, i32, i32) -> none
 122
 123 subroutine test_unlimited_polymorphic_null(p)
 124   class(*), pointer :: p(:)
 125   p => null()
 126 end subroutine
 127 ! CHECK-LABEL:   func.func @_QPtest_unlimited_polymorphic_null(
 128 ! CHECK-SAME:  %[[VAL_0:.*]]: !fir.ref<!fir.class<!fir.ptr<!fir.array<?xnone>>>>
 129 ! CHECK:  %[[VAL_1:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xnone>>
 130 ! CHECK:  %[[VAL_2:.*]] = arith.constant 0 : index
 131 ! CHECK:  %[[VAL_3:.*]] = fir.shape %[[VAL_2]] : (index) -> !fir.shape<1>
 132 ! CHECK:  %[[VAL_4:.*]] = fir.embox %[[VAL_1]](%[[VAL_3]]) : (!fir.ptr<!fir.array<?xnone>>, !fir.shape<1>) -> !fir.class<!fir.ptr<!fir.array<?xnone>>>
 133 ! CHECK:  fir.store %[[VAL_4]] to %[[VAL_0]] : !fir.ref<!fir.class<!fir.ptr<!fir.array<?xnone>>>>