xref: /llvm-project/flang/test/Lower/pointer-initial-target.f90 (revision 3de6b1ce0dd1d7358c75f1bbafc6ee6e70a51875) 
1! Test lowering of pointer initial target
2! RUN: bbc -emit-fir %s -o - | FileCheck %s
3
4! -----------------------------------------------------------------------------
5!     Test scalar initial data target that are simple names
6! -----------------------------------------------------------------------------
7
8subroutine scalar()
9  real, save, target :: x
10  real, pointer :: p => x
11! CHECK-LABEL: fir.global internal @_QFscalarEp : !fir.box<!fir.ptr<f32>>
12  ! CHECK: %[[x:.*]] = fir.address_of(@_QFscalarEx) : !fir.ref<f32>
13  ! CHECK: %[[box:.*]] = fir.embox %[[x]] : (!fir.ref<f32>) -> !fir.box<!fir.ptr<f32>>
14  ! CHECK: fir.has_value %[[box]] : !fir.box<!fir.ptr<f32>>
15end subroutine
16
17subroutine scalar_char()
18  character(10), save, target :: x
19  character(:), pointer :: p => x
20! CHECK-LABEL: fir.global internal @_QFscalar_charEp : !fir.box<!fir.ptr<!fir.char<1,?>>>
21  ! CHECK: %[[x:.*]] = fir.address_of(@_QFscalar_charEx) : !fir.ref<!fir.char<1,10>>
22  ! CHECK: %[[xCast:.*]] = fir.convert %[[x]] : (!fir.ref<!fir.char<1,10>>) -> !fir.ptr<!fir.char<1,?>>
23  ! CHECK: %[[box:.*]] = fir.embox %[[xCast]] typeparams %c10{{.*}} : (!fir.ptr<!fir.char<1,?>>, index) -> !fir.box<!fir.ptr<!fir.char<1,?>>>
24  ! CHECK: fir.has_value %[[box]] : !fir.box<!fir.ptr<!fir.char<1,?>>>
25end subroutine
26
27subroutine scalar_char_2()
28  character(10), save, target :: x
29  character(10), pointer :: p => x
30! CHECK-LABEL: fir.global internal @_QFscalar_char_2Ep : !fir.box<!fir.ptr<!fir.char<1,10>>>
31  ! CHECK: %[[x:.*]] = fir.address_of(@_QFscalar_char_2Ex) : !fir.ref<!fir.char<1,10>>
32  ! CHECK: %[[box:.*]] = fir.embox %[[x]] : (!fir.ref<!fir.char<1,10>>) -> !fir.box<!fir.ptr<!fir.char<1,10>>>
33  ! CHECK: fir.has_value %[[box]] : !fir.box<!fir.ptr<!fir.char<1,10>>>
34end subroutine
35
36subroutine scalar_derived()
37  type t
38    real :: x
39    integer :: i
40  end type
41  type(t), save, target :: x
42  type(t), pointer :: p => x
43! CHECK-LABEL: fir.global internal @_QFscalar_derivedEp : !fir.box<!fir.ptr<!fir.type<_QFscalar_derivedTt{x:f32,i:i32}>>>
44  ! CHECK: %[[x:.*]] = fir.address_of(@_QFscalar_derivedEx) : !fir.ref<!fir.type<_QFscalar_derivedTt{x:f32,i:i32}>>
45  ! CHECK: %[[box:.*]] = fir.embox %[[x]] : (!fir.ref<!fir.type<_QFscalar_derivedTt{x:f32,i:i32}>>) -> !fir.box<!fir.ptr<!fir.type<_QFscalar_derivedTt{x:f32,i:i32}>>>
46  ! CHECK: fir.has_value %[[box]] : !fir.box<!fir.ptr<!fir.type<_QFscalar_derivedTt{x:f32,i:i32}>>>
47end subroutine
48
49subroutine scalar_null()
50  real, pointer :: p => NULL()
51! CHECK-LABEL: fir.global internal @_QFscalar_nullEp : !fir.box<!fir.ptr<f32>>
52  ! CHECK: %[[zero:.*]] = fir.zero_bits !fir.ptr<f32>
53  ! CHECK: %[[box:.*]] = fir.embox %[[zero]] : (!fir.ptr<f32>) -> !fir.box<!fir.ptr<f32>>
54  ! CHECK: fir.has_value %[[box]] : !fir.box<!fir.ptr<f32>>
55end subroutine
56
57! -----------------------------------------------------------------------------
58!     Test array initial data target that are simple names
59! -----------------------------------------------------------------------------
60
61subroutine array()
62  real, save, target :: x(100)
63  real, pointer :: p(:) => x
64! CHECK-LABEL: fir.global internal @_QFarrayEp : !fir.box<!fir.ptr<!fir.array<?xf32>>>
65  ! CHECK: %[[x:.*]] = fir.address_of(@_QFarrayEx) : !fir.ref<!fir.array<100xf32>>
66  ! CHECK: %[[shape:.*]] = fir.shape %c100{{.*}} : (index) -> !fir.shape<1>
67  ! CHECK: %[[box:.*]] = fir.embox %[[x]](%[[shape]]) : (!fir.ref<!fir.array<100xf32>>, !fir.shape<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
68  ! CHECK: fir.has_value %[[box]] : !fir.box<!fir.ptr<!fir.array<?xf32>>>
69end subroutine
70
71subroutine array_char()
72  character(10), save, target :: x(20)
73  character(:), pointer :: p(:) => x
74! CHECK-LABEL: fir.global internal @_QFarray_charEp : !fir.box<!fir.ptr<!fir.array<?x!fir.char<1,?>>>>
75  ! CHECK: %[[x:.*]] = fir.address_of(@_QFarray_charEx) : !fir.ref<!fir.array<20x!fir.char<1,10>>>
76  ! CHECK: %[[shape:.*]] = fir.shape %c20{{.*}} : (index) -> !fir.shape<1>
77  ! CHECK: %[[xCast:.*]] = fir.convert %[[x]] : (!fir.ref<!fir.array<20x!fir.char<1,10>>>) -> !fir.ptr<!fir.array<?x!fir.char<1,?>>>
78  ! CHECK: %[[box:.*]] = fir.embox %[[xCast]](%[[shape]]) typeparams %c10{{.*}} : (!fir.ptr<!fir.array<?x!fir.char<1,?>>>, !fir.shape<1>, index) -> !fir.box<!fir.ptr<!fir.array<?x!fir.char<1,?>>>>
79  ! CHECK: fir.has_value %[[box]] : !fir.box<!fir.ptr<!fir.array<?x!fir.char<1,?>>>>
80end subroutine
81
82subroutine array_char_2()
83  character(10), save, target :: x(20)
84  character(10), pointer :: p(:) => x
85! CHECK-LABEL: fir.global internal @_QFarray_char_2Ep : !fir.box<!fir.ptr<!fir.array<?x!fir.char<1,10>>>>
86  ! CHECK: %[[x:.*]] = fir.address_of(@_QFarray_char_2Ex) : !fir.ref<!fir.array<20x!fir.char<1,10>>>
87  ! CHECK: %[[shape:.*]] = fir.shape %c20{{.*}} : (index) -> !fir.shape<1>
88  ! CHECK: %[[box:.*]] = fir.embox %[[x]](%[[shape]]) : (!fir.ref<!fir.array<20x!fir.char<1,10>>>, !fir.shape<1>) -> !fir.box<!fir.ptr<!fir.array<?x!fir.char<1,10>>>>
89  ! CHECK: fir.has_value %[[box]] : !fir.box<!fir.ptr<!fir.array<?x!fir.char<1,10>>>>
90end subroutine
91
92subroutine array_derived()
93  type t
94    real :: x
95    integer :: i
96  end type
97  type(t), save, target :: x(100)
98  type(t), pointer :: p(:) => x
99! CHECK-LABEL: fir.global internal @_QFarray_derivedEp : !fir.box<!fir.ptr<!fir.array<?x!fir.type<_QFarray_derivedTt{x:f32,i:i32}>>>>
100  ! CHECK: %[[x:.*]] = fir.address_of(@_QFarray_derivedEx) : !fir.ref<!fir.array<100x!fir.type<_QFarray_derivedTt{x:f32,i:i32}>>>
101  ! CHECK: %[[shape:.*]] = fir.shape %c100{{.*}} : (index) -> !fir.shape<1>
102  ! CHECK: %[[box:.*]] = fir.embox %[[x]](%[[shape]]) : (!fir.ref<!fir.array<100x!fir.type<_QFarray_derivedTt{x:f32,i:i32}>>>, !fir.shape<1>) -> !fir.box<!fir.ptr<!fir.array<?x!fir.type<_QFarray_derivedTt{x:f32,i:i32}>>>>
103  ! CHECK: fir.has_value %[[box]] : !fir.box<!fir.ptr<!fir.array<?x!fir.type<_QFarray_derivedTt{x:f32,i:i32}>>>>
104end subroutine
105
106subroutine array_null()
107  real, pointer :: p(:) => NULL()
108! CHECK-LABEL: fir.global internal @_QFarray_nullEp : !fir.box<!fir.ptr<!fir.array<?xf32>>>
109  ! CHECK: %[[zero:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xf32>>
110  ! CHECK: %[[shape:.*]] = fir.shape %c0{{.*}} : (index) -> !fir.shape<1>
111  ! CHECK: %[[box:.*]] = fir.embox %[[zero]](%[[shape]]) : (!fir.ptr<!fir.array<?xf32>>, !fir.shape<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
112  ! CHECK: fir.has_value %[[box]] : !fir.box<!fir.ptr<!fir.array<?xf32>>>
113end subroutine
114
115! -----------------------------------------------------------------------------
116!     Test scalar initial data target that are data references
117! -----------------------------------------------------------------------------
118
119subroutine scalar_ref()
120  real, save, target :: x(4:100)
121  real, pointer :: p => x(50)
122! CHECK-LABEL: fir.global internal @_QFscalar_refEp : !fir.box<!fir.ptr<f32>> {
123  ! CHECK: %[[x:.*]] = fir.address_of(@_QFscalar_refEx) : !fir.ref<!fir.array<97xf32>>
124  ! CHECK: %[[lb:.*]] = fir.convert %c4 : (index) -> i64
125  ! CHECK: %[[idx:.*]] = arith.subi %c50{{.*}}, %[[lb]] : i64
126  ! CHECK: %[[elt:.*]] = fir.coordinate_of %[[x]], %[[idx]] : (!fir.ref<!fir.array<97xf32>>, i64) -> !fir.ref<f32>
127  ! CHECK: %[[box:.*]] = fir.embox %[[elt]] : (!fir.ref<f32>) -> !fir.box<!fir.ptr<f32>>
128  ! CHECK: fir.has_value %[[box]] : !fir.box<!fir.ptr<f32>>
129end subroutine
130
131subroutine scalar_char_ref()
132  character(20), save, target :: x(100)
133  character(10), pointer :: p => x(6)(7:16)
134! CHECK-LABEL: fir.global internal @_QFscalar_char_refEp : !fir.box<!fir.ptr<!fir.char<1,10>>>
135  ! CHECK: %[[x:.*]] = fir.address_of(@_QFscalar_char_refEx) : !fir.ref<!fir.array<100x!fir.char<1,20>>>
136  ! CHECK: %[[idx:.*]] = arith.subi %c6{{.*}}, %c1{{.*}} : i64
137  ! CHECK: %[[elt:.*]] = fir.coordinate_of %[[x]], %[[idx]] : (!fir.ref<!fir.array<100x!fir.char<1,20>>>, i64) -> !fir.ref<!fir.char<1,20>>
138  ! CHECK: %[[eltCast:.*]] = fir.convert %[[elt:.*]] : (!fir.ref<!fir.char<1,20>>) -> !fir.ref<!fir.array<20x!fir.char<1>>>
139  ! CHECK: %[[coor:.*]] = fir.coordinate_of %[[eltCast]], %{{.*}} : (!fir.ref<!fir.array<20x!fir.char<1>>>, index) -> !fir.ref<!fir.char<1>>
140  ! CHECK: %[[substring:.*]] = fir.convert %[[coor]] : (!fir.ref<!fir.char<1>>) -> !fir.ref<!fir.char<1,?>>
141  ! CHECK: %[[substringCast:.*]] = fir.convert %[[substring]] : (!fir.ref<!fir.char<1,?>>) -> !fir.ptr<!fir.char<1,10>>
142  ! CHECK: %[[box:.*]] = fir.embox %[[substringCast]] : (!fir.ptr<!fir.char<1,10>>) -> !fir.box<!fir.ptr<!fir.char<1,10>>>
143  ! CHECK: fir.has_value %[[box]] : !fir.box<!fir.ptr<!fir.char<1,10>>>
144end subroutine
145
146! -----------------------------------------------------------------------------
147!     Test array initial data target that are data references
148! -----------------------------------------------------------------------------
149
150
151subroutine array_ref()
152  real, save, target :: x(4:103, 5:104)
153  real, pointer :: p(:) => x(10, 20:100:2)
154end subroutine
155
156! CHECK-LABEL: fir.global internal @_QFarray_refEp : !fir.box<!fir.ptr<!fir.array<?xf32>>> {
157! CHECK:         %[[VAL_0:.*]] = fir.address_of(@_QFarray_refEx) : !fir.ref<!fir.array<100x100xf32>>
158! CHECK:         %[[VAL_1:.*]] = arith.constant 4 : index
159! CHECK:         %[[VAL_2:.*]] = arith.constant 100 : index
160! CHECK:         %[[VAL_3:.*]] = arith.constant 5 : index
161! CHECK:         %[[VAL_4:.*]] = arith.constant 100 : index
162! CHECK:         %[[VAL_5:.*]] = arith.constant 1 : index
163! CHECK:         %[[VAL_6:.*]] = arith.constant 1 : index
164! CHECK:         %[[VAL_7:.*]] = arith.constant 10 : i64
165! CHECK:         %[[VAL_8:.*]] = fir.undefined index
166! CHECK:         %[[VAL_9:.*]] = fir.convert %[[VAL_7]] : (i64) -> index
167! CHECK:         %[[VAL_10:.*]] = arith.subi %[[VAL_9]], %[[VAL_1]] : index
168! CHECK:         %[[VAL_11:.*]] = arith.constant 20 : i64
169! CHECK:         %[[VAL_12:.*]] = fir.convert %[[VAL_11]] : (i64) -> index
170! CHECK:         %[[VAL_13:.*]] = arith.constant 2 : i64
171! CHECK:         %[[VAL_14:.*]] = fir.convert %[[VAL_13]] : (i64) -> index
172! CHECK:         %[[VAL_15:.*]] = arith.constant 100 : i64
173! CHECK:         %[[VAL_16:.*]] = fir.convert %[[VAL_15]] : (i64) -> index
174! CHECK:         %[[VAL_17:.*]] = arith.constant 0 : index
175! CHECK:         %[[VAL_18:.*]] = arith.subi %[[VAL_16]], %[[VAL_12]] : index
176! CHECK:         %[[VAL_19:.*]] = arith.addi %[[VAL_18]], %[[VAL_14]] : index
177! CHECK:         %[[VAL_20:.*]] = arith.divsi %[[VAL_19]], %[[VAL_14]] : index
178! CHECK:         %[[VAL_21:.*]] = arith.cmpi sgt, %[[VAL_20]], %[[VAL_17]] : index
179! CHECK:         %[[VAL_22:.*]] = arith.select %[[VAL_21]], %[[VAL_20]], %[[VAL_17]] : index
180! CHECK:         %[[VAL_23:.*]] = fir.shape_shift %[[VAL_1]], %[[VAL_2]], %[[VAL_3]], %[[VAL_4]] : (index, index, index, index) -> !fir.shapeshift<2>
181! CHECK:         %[[VAL_24:.*]] = fir.slice %[[VAL_7]], %[[VAL_8]], %[[VAL_8]], %[[VAL_12]], %[[VAL_16]], %[[VAL_14]] : (i64, index, index, index, index, index) -> !fir.slice<2>
182! CHECK:         %[[VAL_25:.*]] = fir.embox %[[VAL_0]](%[[VAL_23]]) {{\[}}%[[VAL_24]]] : (!fir.ref<!fir.array<100x100xf32>>, !fir.shapeshift<2>, !fir.slice<2>) -> !fir.box<!fir.array<?xf32>>
183! CHECK:         %[[VAL_26:.*]] = fir.embox %[[VAL_0]](%[[VAL_23]]) {{\[}}%[[VAL_24]]] : (!fir.ref<!fir.array<100x100xf32>>, !fir.shapeshift<2>, !fir.slice<2>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
184! CHECK:         fir.has_value %[[VAL_26]] : !fir.box<!fir.ptr<!fir.array<?xf32>>>
185! CHECK:       }
186