flang/test/Lower/default-initialization-globals.f90

   1 ! Test default initialization of global variables (static init)
   2 ! RUN: bbc %s -o - | FileCheck %s
   3
   4 module tinit
   5   real, target :: ziel(100)
   6
   7   type tno_init
   8     integer :: k
   9   end type
  10
  11   type t0
  12     integer :: k = 66
  13   end type
  14
  15   ! Test type that combines all kinds of components with and without
  16   ! default initialization.
  17   type t1
  18     ! Simple type component with default init
  19     integer :: i = 42
  20     ! Simple type component without default init
  21     integer :: j
  22
  23     ! Pointer component with a default initial target
  24     real, pointer :: x(:) => ziel
  25     ! Pointer component with no init
  26     real, pointer :: y(:)
  27     ! Pointer component with null init
  28     real, pointer :: z(:) => NULL()
  29
  30     ! Character component with init
  31     character(10) c1 = "hello"
  32     ! Character component without init
  33     character(10) c2
  34
  35     ! Component with a derived type that has default init
  36     type(t0) :: somet0
  37     ! Component with a derived type that has no default init.
  38     type(tno_init) :: sometno_init
  39     ! Component whose type default init is overridden by
  40     ! default init for the component.
  41     type(t0) :: somet0_2 = t0(33)
  42     ! Array component with a derived type that has default init
  43     type(t0) :: somet0_array
  44   end type
  45
  46   ! Test type that extends type with default init.
  47   type, extends(t0) :: textendst0
  48     integer :: l
  49   end type
  50
  51   ! Test type with default init in equivalences
  52   type tseq
  53     sequence
  54     integer :: i = 2
  55     integer :: j = 3
  56   end type
  57
  58   type tv
  59     real, pointer :: v(:)
  60   end type
  61
  62   real, pointer :: mv(:)
  63
  64   ! Test scalar with default init
  65   type(t0) :: at0
  66 ! CHECK-LABEL: fir.global @_QMtinitEat0 : !fir.type<_QMtinitTt0{k:i32}> {
  67   ! CHECK: %[[VAL_0:.*]] = arith.constant 66 : i32
  68   ! CHECK: %[[VAL_1:.*]] = fir.undefined !fir.type<_QMtinitTt0{k:i32}>
  69   ! CHECK: %[[VAL_2:.*]] = fir.insert_value %[[VAL_1]], %[[VAL_0]], ["k", !fir.type<_QMtinitTt0{k:i32}>] : (!fir.type<_QMtinitTt0{k:i32}>, i32) -> !fir.type<_QMtinitTt0{k:i32}>
  70   ! CHECK: fir.has_value %[[VAL_2]] : !fir.type<_QMtinitTt0{k:i32}>
  71
  72   ! Test array with default init
  73   type(t0) :: bt0(100)
  74 ! CHECK-LABEL: @_QMtinitEbt0 : !fir.array<100x!fir.type<_QMtinitTt0{k:i32}>> {
  75   ! CHECK: %[[VAL_3:.*]] = arith.constant 66 : i32
  76   ! CHECK: %[[VAL_4:.*]] = fir.undefined !fir.type<_QMtinitTt0{k:i32}>
  77   ! CHECK: %[[VAL_5:.*]] = fir.insert_value %[[VAL_4]], %[[VAL_3]], ["k", !fir.type<_QMtinitTt0{k:i32}>] : (!fir.type<_QMtinitTt0{k:i32}>, i32) -> !fir.type<_QMtinitTt0{k:i32}>
  78   ! CHECK: %[[VAL_6:.*]] = fir.undefined !fir.array<100x!fir.type<_QMtinitTt0{k:i32}>>
  79   ! CHECK: %[[VAL_7:.*]] = fir.insert_on_range %[[VAL_6]], %[[VAL_5]] from (0) to (99) : (!fir.array<100x!fir.type<_QMtinitTt0{k:i32}>>, !fir.type<_QMtinitTt0{k:i32}>) -> !fir.array<100x!fir.type<_QMtinitTt0{k:i32}>>
  80   ! CHECK: fir.has_value %[[VAL_7]] : !fir.array<100x!fir.type<_QMtinitTt0{k:i32}>>
  81
  82   ! Test default init overridden by explicit init
  83   type(t0) :: ct0 = t0(42)
  84 ! CHECK-LABEL: fir.global @_QMtinitEct0 : !fir.type<_QMtinitTt0{k:i32}> {
  85   ! CHECK: %[[VAL_8:.*]] = arith.constant 42 : i32
  86   ! CHECK: %[[VAL_9:.*]] = fir.undefined !fir.type<_QMtinitTt0{k:i32}>
  87   ! CHECK: %[[VAL_10:.*]] = fir.insert_value %[[VAL_9]], %[[VAL_8]], ["k", !fir.type<_QMtinitTt0{k:i32}>] : (!fir.type<_QMtinitTt0{k:i32}>, i32) -> !fir.type<_QMtinitTt0{k:i32}>
  88   ! CHECK: fir.has_value %[[VAL_10]] : !fir.type<_QMtinitTt0{k:i32}>
  89
  90   ! Test a non trivial derived type mixing all sorts of default initialization
  91   type(t1) :: dt1
  92 ! CHECK-LABEL: @_QMtinitEdt1 : !fir.type<_QMtinitTt1{{.*}}> {
  93   ! CHECK-DAG: %[[VAL_11:.*]] = arith.constant 42 : i32
  94   ! CHECK-DAG: %[[VAL_12:.*]] = arith.constant 100 : index
  95   ! CHECK-DAG: %[[VAL_13:.*]] = arith.constant 0 : index
  96   ! CHECK-DAG: %[[VAL_14:.*]] = arith.constant 33 : i32
  97   ! CHECK-DAG: %[[VAL_15:.*]] = arith.constant 66 : i32
  98   ! CHECK: %[[VAL_16:.*]] = fir.undefined !fir.type<_QMtinitTt1{{.*}}>
  99   ! CHECK: %[[VAL_17:.*]] = fir.insert_value %[[VAL_16]], %[[VAL_11]], ["i", !fir.type<_QMtinitTt1{{.*}}>] : (!fir.type<_QMtinitTt1{{.*}}>, i32) -> !fir.type<_QMtinitTt1{{.*}}>
 100   ! CHECK: %[[VAL_18:.*]] = fir.undefined i32
 101   ! CHECK: %[[VAL_19:.*]] = fir.insert_value %[[VAL_17]], %[[VAL_18]], ["j", !fir.type<_QMtinitTt1{{.*}}>] : (!fir.type<_QMtinitTt1{{.*}}>, i32) -> !fir.type<_QMtinitTt1{{.*}}>
 102   ! CHECK: %[[VAL_20:.*]] = fir.address_of(@_QMtinitEziel) : !fir.ref<!fir.array<100xf32>>
 103   ! CHECK: %[[VAL_21:.*]] = fir.shape %[[VAL_12]] : (index) -> !fir.shape<1>
 104   ! CHECK: %[[VAL_22:.*]] = fir.embox %[[VAL_20]](%[[VAL_21]]) : (!fir.ref<!fir.array<100xf32>>, !fir.shape<1>) -> !fir.box<!fir.array<100xf32>>
 105   ! CHECK: %[[VAL_22_B:.*]] = fir.rebox %[[VAL_22]] : (!fir.box<!fir.array<100xf32>>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
 106   ! CHECK: %[[VAL_23:.*]] = fir.insert_value %[[VAL_19]], %[[VAL_22_B]], ["x", !fir.type<_QMtinitTt1{{.*}}>] : (!fir.type<_QMtinitTt1{{.*}}>, !fir.box<!fir.ptr<!fir.array<?xf32>>>) -> !fir.type<_QMtinitTt1{{.*}}>
 107   ! CHECK: %[[VAL_24:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xf32>>
 108   ! CHECK: %[[VAL_25:.*]] = fir.shape %[[VAL_13]] : (index) -> !fir.shape<1>
 109   ! CHECK: %[[VAL_26:.*]] = fir.embox %[[VAL_24]](%[[VAL_25]]) : (!fir.ptr<!fir.array<?xf32>>, !fir.shape<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
 110   ! CHECK: %[[VAL_27:.*]] = fir.insert_value %[[VAL_23]], %[[VAL_26]], ["y", !fir.type<_QMtinitTt1{{.*}}>] : (!fir.type<_QMtinitTt1{{.*}}>, !fir.box<!fir.ptr<!fir.array<?xf32>>>) -> !fir.type<_QMtinitTt1{{.*}}>
 111   ! CHECK: %[[VAL_28:.*]] = fir.insert_value %[[VAL_27]], %[[VAL_26]], ["z", !fir.type<_QMtinitTt1{{.*}}>] : (!fir.type<_QMtinitTt1{{.*}}>, !fir.box<!fir.ptr<!fir.array<?xf32>>>) -> !fir.type<_QMtinitTt1{{.*}}>
 112   ! CHECK: %[[VAL_29:.*]] = fir.string_lit "hello     "(10) : !fir.char<1,10>
 113   ! CHECK: %[[VAL_30:.*]] = fir.insert_value %[[VAL_28]], %[[VAL_29]], ["c1", !fir.type<_QMtinitTt1{{.*}}>] : (!fir.type<_QMtinitTt1{{.*}}>, !fir.char<1,10>) -> !fir.type<_QMtinitTt1{{.*}}>
 114   ! CHECK: %[[VAL_31:.*]] = fir.undefined !fir.char<1,10>
 115   ! CHECK: %[[VAL_32:.*]] = fir.insert_value %[[VAL_30]], %[[VAL_31]], ["c2", !fir.type<_QMtinitTt1{{.*}}>] : (!fir.type<_QMtinitTt1{{.*}}>, !fir.char<1,10>) -> !fir.type<_QMtinitTt1{{.*}}>
 116   ! CHECK: %[[VAL_33:.*]] = fir.undefined !fir.type<_QMtinitTt0{k:i32}>
 117   ! CHECK: %[[VAL_34:.*]] = fir.insert_value %[[VAL_33]], %[[VAL_15]], ["k", !fir.type<_QMtinitTt0{k:i32}>] : (!fir.type<_QMtinitTt0{k:i32}>, i32) -> !fir.type<_QMtinitTt0{k:i32}>
 118   ! CHECK: %[[VAL_35:.*]] = fir.insert_value %[[VAL_32]], %[[VAL_34]], ["somet0", !fir.type<_QMtinitTt1{{.*}}>] : (!fir.type<_QMtinitTt1{{.*}}>, !fir.type<_QMtinitTt0{k:i32}>) -> !fir.type<_QMtinitTt1{{.*}}>
 119   ! CHECK: %[[VAL_36:.*]] = fir.undefined !fir.type<_QMtinitTtno_init{k:i32}>
 120   ! CHECK: %[[VAL_37:.*]] = fir.insert_value %[[VAL_35]], %[[VAL_36]], ["sometno_init", !fir.type<_QMtinitTt1{{.*}}>] : (!fir.type<_QMtinitTt1{{.*}}>, !fir.type<_QMtinitTtno_init{k:i32}>) -> !fir.type<_QMtinitTt1{{.*}}>
 121   ! CHECK: %[[VAL_38:.*]] = fir.insert_value %[[VAL_33]], %[[VAL_14]], ["k", !fir.type<_QMtinitTt0{k:i32}>] : (!fir.type<_QMtinitTt0{k:i32}>, i32) -> !fir.type<_QMtinitTt0{k:i32}>
 122   ! CHECK: %[[VAL_39:.*]] = fir.insert_value %[[VAL_37]], %[[VAL_38]], ["somet0_2", !fir.type<_QMtinitTt1{{.*}}>] : (!fir.type<_QMtinitTt1{{.*}}>, !fir.type<_QMtinitTt0{k:i32}>) -> !fir.type<_QMtinitTt1{{.*}}>
 123   ! CHECK: %[[VAL_40:.*]] = fir.insert_value %[[VAL_39]], %[[VAL_34]], ["somet0_array", !fir.type<_QMtinitTt1{{.*}}>] : (!fir.type<_QMtinitTt1{{.*}}>, !fir.type<_QMtinitTt0{k:i32}>) -> !fir.type<_QMtinitTt1{{.*}}>
 124   ! CHECK: fir.has_value %[[VAL_40]] : !fir.type<_QMtinitTt1{{.*}}>
 125
 126   ! Test a type extending other type with a default init
 127   type(textendst0) :: etextendst0
 128 ! CHECK-LABEL: @_QMtinitEetextendst0 : !fir.type<_QMtinitTtextendst0{k:i32,l:i32}> {
 129   ! CHECK: %[[VAL_42:.*]] = arith.constant 66 : i32
 130   ! CHECK: %[[VAL_43:.*]] = fir.undefined !fir.type<_QMtinitTtextendst0{k:i32,l:i32}>
 131   ! CHECK: %[[VAL_44:.*]] = fir.insert_value %[[VAL_43]], %[[VAL_42]], ["k", !fir.type<_QMtinitTtextendst0{k:i32,l:i32}>] : (!fir.type<_QMtinitTtextendst0{k:i32,l:i32}>, i32) -> !fir.type<_QMtinitTtextendst0{k:i32,l:i32}>
 132   ! CHECK: %[[VAL_45:.*]] = fir.undefined i32
 133   ! CHECK: %[[VAL_46:.*]] = fir.insert_value %[[VAL_44]], %[[VAL_45]], ["l", !fir.type<_QMtinitTtextendst0{k:i32,l:i32}>] : (!fir.type<_QMtinitTtextendst0{k:i32,l:i32}>, i32) -> !fir.type<_QMtinitTtextendst0{k:i32,l:i32}>
 134   ! CHECK: fir.has_value %[[VAL_46]] : !fir.type<_QMtinitTtextendst0{k:i32,l:i32}>
 135
 136   type(tv) :: withmold = tv(null(mv))
 137   ! CHECK-LABEL: fir.global @_QMtinitEwithmold
 138   ! CHECK: %[[C0:.*]] = arith.constant 0 : index
 139   ! CHECK: %[[UNDEF:.*]] = fir.undefined !fir.type<_QMtinitTtv{v:!fir.box<!fir.ptr<!fir.array<?xf32>>>}>
 140   ! CHECK: %[[ZERO:.*]] = fir.zero_bits !fir.ptr<!fir.array<?xf32>>
 141   ! CHECK: %[[SHAPE:.*]] = fir.shape %[[C0]] : (index) -> !fir.shape<1>
 142   ! CHECK: %[[ZEROBOX:.*]] = fir.embox %[[ZERO]](%[[SHAPE]]) : (!fir.ptr<!fir.array<?xf32>>, !fir.shape<1>) -> !fir.box<!fir.ptr<!fir.array<?xf32>>>
 143   ! CHECK: %[[RET:.*]] = fir.insert_value %[[UNDEF]], %[[ZEROBOX]], ["v", !fir.type<_QMtinitTtv{v:!fir.box<!fir.ptr<!fir.array<?xf32>>>}>] : (!fir.type<_QMtinitTtv{v:!fir.box<!fir.ptr<!fir.array<?xf32>>>}>, !fir.box<!fir.ptr<!fir.array<?xf32>>>) -> !fir.type<_QMtinitTtv{v:!fir.box<!fir.ptr<!fir.array<?xf32>>>}>
 144   ! CHECK: fir.has_value %[[RET]] : !fir.type<_QMtinitTtv{v:!fir.box<!fir.ptr<!fir.array<?xf32>>>}>
 145
 146 end module
 147
 148
 149 ! Test that default initialization is also applied to saved variables
 150 subroutine saved()
 151   use tinit
 152   type(t0), save :: savedt0
 153 ! CHECK-LABEL: fir.global internal @_QFsavedEsavedt0 : !fir.type<_QMtinitTt0{k:i32}> {
 154   ! CHECK: %[[VAL_47:.*]] = arith.constant 66 : i32
 155   ! CHECK: %[[VAL_48:.*]] = fir.undefined !fir.type<_QMtinitTt0{k:i32}>
 156   ! CHECK: %[[VAL_49:.*]] = fir.insert_value %[[VAL_48]], %[[VAL_47]], ["k", !fir.type<_QMtinitTt0{k:i32}>] : (!fir.type<_QMtinitTt0{k:i32}>, i32) -> !fir.type<_QMtinitTt0{k:i32}>
 157   ! CHECK: fir.has_value %[[VAL_49]] : !fir.type<_QMtinitTt0{k:i32}>
 158 end subroutine
 159
 160 ! Test default initialization in equivalences
 161 subroutine eqv()
 162   use tinit
 163   type(tseq), save :: somet
 164   integer :: i(2)
 165   equivalence (somet, i)
 166 ! CHECK-LABEL: fir.global internal @_QFeqvEi : !fir.array<2xi32> {
 167   ! CHECK-DAG: %[[VAL_50:.*]] = arith.constant 2 : i32
 168   ! CHECK-DAG: %[[VAL_51:.*]] = arith.constant 3 : i32
 169   ! CHECK: %[[VAL_52:.*]] = fir.undefined !fir.array<2xi32>
 170   ! CHECK: %[[VAL_53:.*]] = fir.insert_value %[[VAL_52]], %[[VAL_50]], [0 : index] : (!fir.array<2xi32>, i32) -> !fir.array<2xi32>
 171   ! CHECK: %[[VAL_54:.*]] = fir.insert_value %[[VAL_53]], %[[VAL_51]], [1 : index] : (!fir.array<2xi32>, i32) -> !fir.array<2xi32>
 172   ! CHECK: fir.has_value %[[VAL_54]] : !fir.array<2xi32>
 173 end subroutine
 174
 175 subroutine eqv_explicit_init()
 176   use tinit
 177   type(tseq), save :: somet
 178   integer :: i(2) = [4, 5]
 179   equivalence (somet, i)
 180 ! CHECK-LABEL: fir.global internal @_QFeqv_explicit_initEi : !fir.array<2xi32> {
 181   ! CHECK-DAG: %[[VAL_57:.*]] = arith.constant 4 : i32
 182   ! CHECK-DAG: %[[VAL_58:.*]] = arith.constant 5 : i32
 183   ! CHECK: %[[VAL_59:.*]] = fir.undefined !fir.array<2xi32>
 184   ! CHECK: %[[VAL_60:.*]] = fir.insert_value %[[VAL_59]], %[[VAL_57]], [0 : index] : (!fir.array<2xi32>, i32) -> !fir.array<2xi32>
 185   ! CHECK: %[[VAL_61:.*]] = fir.insert_value %[[VAL_60]], %[[VAL_58]], [1 : index] : (!fir.array<2xi32>, i32) -> !fir.array<2xi32>
 186   ! CHECK: fir.has_value %[[VAL_61]] : !fir.array<2xi32>
 187 end subroutine
 188
 189 subroutine eqv_same_default_init()
 190   use tinit
 191   type(tseq), save :: somet1(2), somet2
 192   equivalence (somet1(1), somet2)
 193 ! CHECK-LABEL: fir.global internal @_QFeqv_same_default_initEsomet1 : !fir.array<2xi64> {
 194   ! CHECK: %[[VAL_62:.*]] = arith.constant 12884901890 : i64
 195   ! CHECK: %[[VAL_63:.*]] = fir.undefined !fir.array<2xi64>
 196   ! CHECK: %[[VAL_64:.*]] = fir.insert_on_range %[[VAL_63]], %[[VAL_62]] from (0) to (1) : (!fir.array<2xi64>, i64) -> !fir.array<2xi64>
 197   ! CHECK: fir.has_value %[[VAL_64]] : !fir.array<2xi64>
 198 end subroutine
 199
 200 subroutine eqv_full_overlaps_with_explicit_init()
 201   use tinit
 202   type(tseq), save :: somet
 203   integer, save :: link(4)
 204   integer :: i(2) = [5, 6]
 205   integer :: j(2) = [7, 8]
 206   ! Equivalence: somet fully covered by explicit init.
 207   !   i(1)=5 | i(2)=6  |    -    |  -
 208   !     -    | somet%i | somet%j |
 209   !     -    |    -    | j(1)=7  | j(2)=8
 210   equivalence (i, link(1))
 211   equivalence (somet, link(2))
 212   equivalence (j, link(3))
 213 ! CHECK-LABEL: fir.global internal @_QFeqv_full_overlaps_with_explicit_initEi : !fir.array<4xi32> {
 214   ! CHECK-DAG: %[[VAL_73:.*]] = arith.constant 5 : i32
 215   ! CHECK-DAG: %[[VAL_74:.*]] = arith.constant 6 : i32
 216   ! CHECK-DAG: %[[VAL_75:.*]] = arith.constant 7 : i32
 217   ! CHECK-DAG: %[[VAL_76:.*]] = arith.constant 8 : i32
 218   ! CHECK-DAG: %[[VAL_77:.*]] = fir.undefined !fir.array<4xi32>
 219   ! CHECK-DAG: %[[VAL_78:.*]] = fir.insert_value %[[VAL_77]], %[[VAL_73]], [0 : index] : (!fir.array<4xi32>, i32) -> !fir.array<4xi32>
 220   ! CHECK-DAG: %[[VAL_79:.*]] = fir.insert_value %[[VAL_78]], %[[VAL_74]], [1 : index] : (!fir.array<4xi32>, i32) -> !fir.array<4xi32>
 221   ! CHECK-DAG: %[[VAL_80:.*]] = fir.insert_value %[[VAL_79]], %[[VAL_75]], [2 : index] : (!fir.array<4xi32>, i32) -> !fir.array<4xi32>
 222   ! CHECK-DAG: %[[VAL_81:.*]] = fir.insert_value %[[VAL_80]], %[[VAL_76]], [3 : index] : (!fir.array<4xi32>, i32) -> !fir.array<4xi32>
 223   ! CHECK-DAG: fir.has_value %[[VAL_81]] : !fir.array<4xi32>
 224 end subroutine
 225
 226 subroutine eqv_partial_overlaps_with_explicit_init()
 227   use tinit
 228   type(tseq), save :: somet
 229   integer, save :: link(4)
 230   integer :: i(2) = [5, 6]
 231   integer :: j = 7
 232   ! `somet` is only partially covered by explicit init, somet%j default
 233   ! init value should be used in the equiv storage init to match nvfortran,
 234   ! ifort, and nagfor behavior (gfortran refuses this code). 19.5.3.4 point
 235   ! 10 specifies that explicit initialization overrides default initialization.
 236   !   i(1)=5 | i(2)=6  |    -    |  -
 237   !     -    | somet%i | somet%j |
 238   !     -    |    -    |    -    | j=7
 239   equivalence (i, link(1))
 240   equivalence (somet, link(2))
 241   equivalence (j, link(4))
 242 ! CHECK-LABEL: fir.global internal @_QFeqv_partial_overlaps_with_explicit_initEi : !fir.array<4xi32>
 243    ! CHECK-DAG: %[[VAL_82:.*]] = arith.constant 5 : i32
 244    ! CHECK-DAG: %[[VAL_83:.*]] = arith.constant 6 : i32
 245    ! CHECK-DAG: %[[VAL_84:.*]] = arith.constant 3 : i32
 246    ! CHECK-DAG: %[[VAL_85:.*]] = arith.constant 7 : i32
 247    ! CHECK: %[[VAL_86:.*]] = fir.undefined !fir.array<4xi32>
 248    ! CHECK: %[[VAL_87:.*]] = fir.insert_value %[[VAL_86]], %[[VAL_82]], [0 : index] : (!fir.array<4xi32>, i32) -> !fir.array<4xi32>
 249    ! CHECK: %[[VAL_88:.*]] = fir.insert_value %[[VAL_87]], %[[VAL_83]], [1 : index] : (!fir.array<4xi32>, i32) -> !fir.array<4xi32>
 250    ! CHECK: %[[VAL_89:.*]] = fir.insert_value %[[VAL_88]], %[[VAL_84]], [2 : index] : (!fir.array<4xi32>, i32) -> !fir.array<4xi32>
 251    ! CHECK: %[[VAL_90:.*]] = fir.insert_value %[[VAL_89]], %[[VAL_85]], [3 : index] : (!fir.array<4xi32>, i32) -> !fir.array<4xi32>
 252    ! CHECK: fir.has_value %[[VAL_90]] : !fir.array<4xi32>
 253 end subroutine