offload/test/offloading/struct_mapping_with_pointers.cpp

// clang-format off
// RUN: %libomptarget-compilexx-generic && env LIBOMPTARGET_DEBUG=1 %libomptarget-run-generic 2>&1 | %fcheck-generic
// clang-format on

// REQUIRES: libomptarget-debug

// UNSUPPORTED: nvptx64-nvidia-cuda
// UNSUPPORTED: nvptx64-nvidia-cuda-LTO

#include <stdio.h>
#include <stdlib.h>

struct Descriptor {
  int *datum;
  long int x;
  int *more_datum;
  int xi;
  int val_datum, val_more_datum;
  long int arr[1][30];
  int val_arr;
};

int main() {
  Descriptor dat = Descriptor();
  dat.datum = (int *)malloc(sizeof(int) * 10);
  dat.more_datum = (int *)malloc(sizeof(int) * 20);
  dat.xi = 3;
  dat.arr[0][0] = 1;

  dat.datum[7] = 7;
  dat.more_datum[17] = 17;
  dat.datum[dat.arr[0][0]] = 0;

  /// The struct is mapped with type 0x0 when the pointer fields are mapped.
  /// The struct is also map explicitly by the user. The second mapping by
  /// the user must not overwrite the mapping set up for the pointer fields
  /// when mapping the struct happens after the mapping of the pointers.

  // clang-format off
  // CHECK: omptarget --> Entry  0: Base=[[DAT_HST_PTR_BASE:0x.*]], Begin=[[DAT_HST_PTR_BASE]], Size=288, Type=0x0, Name=unknown
  // CHECK: omptarget --> Entry  1: Base=[[DAT_HST_PTR_BASE]], Begin=[[DAT_HST_PTR_BASE]], Size=288, Type=0x1000000000001, Name=unknown
  // CHECK: omptarget --> Entry  2: Base=[[DAT_HST_PTR_BASE]], Begin=[[DATUM_HST_PTR_BASE:0x.*]], Size=40, Type=0x1000000000011, Name=unknown
  // CHECK: omptarget --> Entry  3: Base=[[MORE_DATUM_HST_PTR_BASE:0x.*]], Begin=[[MORE_DATUM_HST_PTR_BEGIN:0x.*]], Size=80, Type=0x1000000000011, Name=unknown
  // clang-format on

  /// The struct will be mapped in the same order as the above entries.

  /// First argument is the struct itself and it will be mapped once.

  // clang-format off
  // CHECK: omptarget --> Looking up mapping(HstPtrBegin=[[DAT_HST_PTR_BASE]], Size=288)...
  // CHECK: PluginInterface --> MemoryManagerTy::allocate: size 288 with host pointer [[DAT_HST_PTR_BASE]].
  // CHECK: omptarget --> Creating new map entry with HstPtrBase=[[DAT_HST_PTR_BASE]], HstPtrBegin=[[DAT_HST_PTR_BASE]], TgtAllocBegin=[[DAT_DEVICE_PTR_BASE:0x.*]], TgtPtrBegin=[[DAT_DEVICE_PTR_BASE]], Size=288, DynRefCount=1, HoldRefCount=0, Name=unknown
  // CHECK: omptarget --> Moving 288 bytes (hst:[[DAT_HST_PTR_BASE]]) -> (tgt:[[DAT_DEVICE_PTR_BASE]])
  // clang-format on

  /// Second argument is dat.datum:
  // clang-format off
  // CHECK: omptarget --> Looking up mapping(HstPtrBegin=[[DATUM_HST_PTR_BASE]], Size=40)...
  // CHECK: PluginInterface --> MemoryManagerTy::allocate: size 40 with host pointer [[DATUM_HST_PTR_BASE]].
  // CHECK: omptarget --> Creating new map entry with HstPtrBase=[[DATUM_HST_PTR_BASE]], HstPtrBegin=[[DATUM_HST_PTR_BASE]], TgtAllocBegin=[[DATUM_DEVICE_PTR_BASE:0x.*]], TgtPtrBegin=[[DATUM_DEVICE_PTR_BASE]], Size=40, DynRefCount=1, HoldRefCount=0, Name=unknown
  // CHECK: omptarget --> Moving 40 bytes (hst:[[DATUM_HST_PTR_BASE]]) -> (tgt:[[DATUM_DEVICE_PTR_BASE]])
  // clang-format on

  /// Third argument is dat.more_datum:
  // clang-format off
  // CHECK: omptarget --> Looking up mapping(HstPtrBegin=[[MORE_DATUM_HST_PTR_BEGIN]], Size=80)...
  // CHECK: PluginInterface --> MemoryManagerTy::allocate: size 80 with host pointer [[MORE_DATUM_HST_PTR_BEGIN]].
  // CHECK: omptarget --> Creating new map entry with HstPtrBase=[[MORE_DATUM_HST_PTR_BEGIN]], HstPtrBegin=[[MORE_DATUM_HST_PTR_BEGIN]], TgtAllocBegin=[[MORE_DATUM_DEVICE_PTR_BEGIN:0x.*]], TgtPtrBegin=[[MORE_DATUM_DEVICE_PTR_BEGIN]], Size=80, DynRefCount=1, HoldRefCount=0, Name=unknown
  // CHECK: omptarget --> Moving 80 bytes (hst:[[MORE_DATUM_HST_PTR_BEGIN]]) -> (tgt:[[MORE_DATUM_DEVICE_PTR_BEGIN]])
  // clang-format on

#pragma omp target enter data map(to : dat.datum[ : 10])                       \
    map(to : dat.more_datum[ : 20]) map(to : dat)

  /// Checks induced by having a target region:
  // clang-format off
  // CHECK: omptarget --> Entry  0: Base=[[DAT_HST_PTR_BASE]], Begin=[[DAT_HST_PTR_BASE]], Size=288, Type=0x223, Name=unknown
  // CHECK: omptarget --> Mapping exists (implicit) with HstPtrBegin=[[DAT_HST_PTR_BASE]], TgtPtrBegin=[[DAT_DEVICE_PTR_BASE]], Size=288, DynRefCount=2 (incremented), HoldRefCount=0, Name=unknown
  // CHECK: omptarget --> Obtained target argument [[DAT_DEVICE_PTR_BASE]] from host pointer [[DAT_HST_PTR_BASE]]
  // clang-format on

#pragma omp target
  {
    dat.xi = 4;
    dat.datum[7]++;
    dat.more_datum[17]++;
    dat.val_datum = dat.datum[7];
    dat.val_more_datum = dat.more_datum[17];
    dat.datum[dat.arr[0][0]] = dat.xi;
    dat.val_arr = dat.datum[dat.arr[0][0]];
  }

  /// Post-target region checks:
  // clang-format off
  // CHECK: omptarget --> Mapping exists with HstPtrBegin=[[DAT_HST_PTR_BASE]], TgtPtrBegin=[[DAT_DEVICE_PTR_BASE]], Size=288, DynRefCount=1 (decremented), HoldRefCount=0
  // clang-format on

#pragma omp target exit data map(from : dat)

  /// Target data end checks:
  // clang-format off
  // CHECK: omptarget --> Mapping exists with HstPtrBegin=[[DAT_HST_PTR_BASE]], TgtPtrBegin=[[DAT_DEVICE_PTR_BASE]], Size=288, DynRefCount=0 (decremented, delayed deletion), HoldRefCount=0
  // CHECK: omptarget --> Moving 288 bytes (tgt:[[DAT_DEVICE_PTR_BASE]]) -> (hst:[[DAT_HST_PTR_BASE]])
  // clang-format on

  // CHECK: dat.xi = 4
  // CHECK: dat.val_datum = 8
  // CHECK: dat.val_more_datum = 18
  // CHECK: dat.datum[dat.arr[0][0]] = 0
  // CHECK: dat.val_arr = 4

  printf("dat.xi = %d\n", dat.xi);
  printf("dat.val_datum = %d\n", dat.val_datum);
  printf("dat.val_more_datum = %d\n", dat.val_more_datum);
  printf("dat.datum[dat.arr[0][0]] = %d\n", dat.datum[dat.arr[0][0]]);
  printf("dat.val_arr = %d\n", dat.val_arr);

  return 0;
}