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[OpenMP] Implement TR8 `present` map type modifier in runtime (2/2) 

This implements OpenMP runtime support for the OpenMP TR8 `present`
map type modifier.  The previous patch in this series implements Clang
front end support.  See that patch summary for behaviors that are not
yet supported.

Reviewed By: grokos, jdoerfert

Differential Revision: https://reviews.llvm.org/D83062
This commit is contained in:
Joel E. Denny 2020-07-22 10:14:30 -04:00
parent aa82c40f0a
commit 45b8f7ec35
12 changed files with 390 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
openmp/libomptarget/include/omptarget.h
View File

@ -49,6 +49,8 @@ enum tgt_map_type {
OMP_TGT_MAPTYPE_IMPLICIT = 0x200,
// copy data to device
OMP_TGT_MAPTYPE_CLOSE = 0x400,
// runtime error if not already allocated
OMP_TGT_MAPTYPE_PRESENT = 0x1000,
// member of struct, member given by [16 MSBs] - 1
OMP_TGT_MAPTYPE_MEMBER_OF = 0xffff000000000000
};

57
openmp/libomptarget/src/device.cpp
View File

@ -160,8 +160,10 @@ LookupResult DeviceTy::lookupMapping(void *HstPtrBegin, int64_t Size) {
// If NULL is returned, then either data allocation failed or the user tried
// to do an illegal mapping.
void *DeviceTy::getOrAllocTgtPtr(void *HstPtrBegin, void *HstPtrBase,
int64_t Size, bool &IsNew, bool &IsHostPtr, bool IsImplicit,
bool UpdateRefCount, bool HasCloseModifier) {
int64_t Size, bool &IsNew, bool &IsHostPtr,
bool IsImplicit, bool UpdateRefCount,
bool HasCloseModifier,
bool HasPresentModifier) {
void *rc = NULL;
IsHostPtr = false;
IsNew = false;
@ -190,31 +192,40 @@ void *DeviceTy::getOrAllocTgtPtr(void *HstPtrBegin, void *HstPtrBase,
} else if ((lr.Flags.ExtendsBefore || lr.Flags.ExtendsAfter) && !IsImplicit) {
// Explicit extension of mapped data - not allowed.
DP("Explicit extension of mapping is not allowed.\n");
} else if (Size) {
// If unified shared memory is active, implicitly mapped variables that are not
// privatized use host address. Any explicitly mapped variables also use
// host address where correctness is not impeded. In all other cases
// maps are respected.
// In addition to the mapping rules above, the close map
// modifier forces the mapping of the variable to the device.
if (RTLs->RequiresFlags & OMP_REQ_UNIFIED_SHARED_MEMORY &&
!HasCloseModifier) {
} else if (RTLs->RequiresFlags & OMP_REQ_UNIFIED_SHARED_MEMORY &&
!HasCloseModifier) {
// If unified shared memory is active, implicitly mapped variables that are
// not privatized use host address. Any explicitly mapped variables also use
// host address where correctness is not impeded. In all other cases maps
// are respected.
// In addition to the mapping rules above, the close map modifier forces the
// mapping of the variable to the device.
if (Size) {
DP("Return HstPtrBegin " DPxMOD " Size=%ld RefCount=%s\n",
DPxPTR((uintptr_t)HstPtrBegin), Size, (UpdateRefCount ? " updated" : ""));
DPxPTR((uintptr_t)HstPtrBegin), Size,
(UpdateRefCount ? " updated" : ""));
IsHostPtr = true;
rc = HstPtrBegin;
} else {
// If it is not contained and Size > 0 we should create a new entry for it.
IsNew = true;
uintptr_t tp = (uintptr_t)RTL->data_alloc(RTLDeviceID, Size, HstPtrBegin);
DP("Creating new map entry: HstBase=" DPxMOD ", HstBegin=" DPxMOD ", "
"HstEnd=" DPxMOD ", TgtBegin=" DPxMOD "\n", DPxPTR(HstPtrBase),
DPxPTR(HstPtrBegin), DPxPTR((uintptr_t)HstPtrBegin + Size), DPxPTR(tp));
HostDataToTargetMap.emplace(
HostDataToTargetTy((uintptr_t)HstPtrBase, (uintptr_t)HstPtrBegin,
(uintptr_t)HstPtrBegin + Size, tp));
rc = (void *)tp;
}
} else if (HasPresentModifier) {
DP("Mapping required by 'present' map type modifier does not exist for "
"HstPtrBegin=" DPxMOD ", Size=%ld\n",
DPxPTR(HstPtrBegin), Size);
MESSAGE("device mapping required by 'present' map type modifier does not "
"exist for host address " DPxMOD " (%ld bytes)",
DPxPTR(HstPtrBegin), Size);
} else if (Size) {
// If it is not contained and Size > 0, we should create a new entry for it.
IsNew = true;
uintptr_t tp = (uintptr_t)RTL->data_alloc(RTLDeviceID, Size, HstPtrBegin);
DP("Creating new map entry: HstBase=" DPxMOD ", HstBegin=" DPxMOD ", "
"HstEnd=" DPxMOD ", TgtBegin=" DPxMOD "\n",
DPxPTR(HstPtrBase), DPxPTR(HstPtrBegin),
DPxPTR((uintptr_t)HstPtrBegin + Size), DPxPTR(tp));
HostDataToTargetMap.emplace(
HostDataToTargetTy((uintptr_t)HstPtrBase, (uintptr_t)HstPtrBegin,
(uintptr_t)HstPtrBegin + Size, tp));
rc = (void *)tp;
}
DataMapMtx.unlock();

5
openmp/libomptarget/src/device.h
View File

@ -177,8 +177,9 @@ struct DeviceTy {
uint64_t getMapEntryRefCnt(void *HstPtrBegin);
LookupResult lookupMapping(void *HstPtrBegin, int64_t Size);
void *getOrAllocTgtPtr(void *HstPtrBegin, void *HstPtrBase, int64_t Size,
bool &IsNew, bool &IsHostPtr, bool IsImplicit, bool UpdateRefCount = true,
bool HasCloseModifier = false);
bool &IsNew, bool &IsHostPtr, bool IsImplicit,
bool UpdateRefCount, bool HasCloseModifier,
bool HasPresentModifier);
void *getTgtPtrBegin(void *HstPtrBegin, int64_t Size);
void *getTgtPtrBegin(void *HstPtrBegin, int64_t Size, bool &IsLast,
bool UpdateRefCount, bool &IsHostPtr);

62
openmp/libomptarget/src/omptarget.cpp
View File

@ -308,6 +308,7 @@ int target_data_begin(DeviceTy &Device, int32_t arg_num, void **args_base,
// Force the creation of a device side copy of the data when:
// a close map modifier was associated with a map that contained a to.
bool HasCloseModifier = arg_types[i] & OMP_TGT_MAPTYPE_CLOSE;
bool HasPresentModifier = arg_types[i] & OMP_TGT_MAPTYPE_PRESENT;
// UpdateRef is based on MEMBER_OF instead of TARGET_PARAM because if we
// have reached this point via __tgt_target_data_begin and not __tgt_target
// then no argument is marked as TARGET_PARAM ("omp target data map" is not
@ -316,13 +317,26 @@ int target_data_begin(DeviceTy &Device, int32_t arg_num, void **args_base,
bool UpdateRef = !(arg_types[i] & OMP_TGT_MAPTYPE_MEMBER_OF);
if (arg_types[i] & OMP_TGT_MAPTYPE_PTR_AND_OBJ) {
DP("Has a pointer entry: \n");
// base is address of pointer.
Pointer_TgtPtrBegin = Device.getOrAllocTgtPtr(HstPtrBase, HstPtrBase,
sizeof(void *), Pointer_IsNew, IsHostPtr, IsImplicit, UpdateRef,
HasCloseModifier);
// Base is address of pointer.
//
// Usually, the pointer is already allocated by this time. For example:
//
// #pragma omp target map(s.p[0:N])
//
// The map entry for s comes first, and the PTR_AND_OBJ entry comes
// afterward, so the pointer is already allocated by the time the
// PTR_AND_OBJ entry is handled below, and Pointer_TgtPtrBegin is thus
// non-null. However, "declare target link" can produce a PTR_AND_OBJ
// entry for a global that might not already be allocated by the time the
// PTR_AND_OBJ entry is handled below, and so the allocation might fail
// when HasPresentModifier.
Pointer_TgtPtrBegin = Device.getOrAllocTgtPtr(
HstPtrBase, HstPtrBase, sizeof(void *), Pointer_IsNew, IsHostPtr,
IsImplicit, UpdateRef, HasCloseModifier, HasPresentModifier);
if (!Pointer_TgtPtrBegin) {
DP("Call to getOrAllocTgtPtr returned null pointer (device failure or "
"illegal mapping).\n");
DP("Call to getOrAllocTgtPtr returned null pointer (%s).\n",
HasPresentModifier ? "'present' map type modifier"
: "device failure or illegal mapping");
return OFFLOAD_FAIL;
}
DP("There are %zu bytes allocated at target address " DPxMOD " - is%s new"
@ -334,13 +348,15 @@ int target_data_begin(DeviceTy &Device, int32_t arg_num, void **args_base,
UpdateRef = true; // subsequently update ref count of pointee
}
void *TgtPtrBegin = Device.getOrAllocTgtPtr(HstPtrBegin, HstPtrBase,
data_size, IsNew, IsHostPtr, IsImplicit, UpdateRef, HasCloseModifier);
if (!TgtPtrBegin && data_size) {
// If data_size==0, then the argument could be a zero-length pointer to
// NULL, so getOrAlloc() returning NULL is not an error.
DP("Call to getOrAllocTgtPtr returned null pointer (device failure or "
"illegal mapping).\n");
void *TgtPtrBegin = Device.getOrAllocTgtPtr(
HstPtrBegin, HstPtrBase, data_size, IsNew, IsHostPtr, IsImplicit,
UpdateRef, HasCloseModifier, HasPresentModifier);
// If data_size==0, then the argument could be a zero-length pointer to
// NULL, so getOrAlloc() returning NULL is not an error.
if (!TgtPtrBegin && (data_size || HasPresentModifier)) {
DP("Call to getOrAllocTgtPtr returned null pointer (%s).\n",
HasPresentModifier ? "'present' map type modifier"
: "device failure or illegal mapping");
return OFFLOAD_FAIL;
}
DP("There are %" PRId64 " bytes allocated at target address " DPxMOD
@ -459,13 +475,27 @@ int target_data_end(DeviceTy &Device, int32_t arg_num, void **args_base,
(arg_types[i] & OMP_TGT_MAPTYPE_PTR_AND_OBJ);
bool ForceDelete = arg_types[i] & OMP_TGT_MAPTYPE_DELETE;
bool HasCloseModifier = arg_types[i] & OMP_TGT_MAPTYPE_CLOSE;
bool HasPresentModifier = arg_types[i] & OMP_TGT_MAPTYPE_PRESENT;
// If PTR_AND_OBJ, HstPtrBegin is address of pointee
void *TgtPtrBegin = Device.getTgtPtrBegin(HstPtrBegin, data_size, IsLast,
UpdateRef, IsHostPtr);
DP("There are %" PRId64 " bytes allocated at target address " DPxMOD
" - is%s last\n", data_size, DPxPTR(TgtPtrBegin),
(IsLast ? "" : " not"));
if (!TgtPtrBegin && (data_size || HasPresentModifier)) {
DP("Mapping does not exist (%s)\n",
(HasPresentModifier ? "'present' map type modifier" : "ignored"));
if (HasPresentModifier) {
// FIXME: This should not be an error on exit from "omp target data",
// but it should be an error upon entering an "omp target exit data".
MESSAGE("device mapping required by 'present' map type modifier does "
"not exist for host address " DPxMOD " (%ld bytes)",
DPxPTR(HstPtrBegin), data_size);
return OFFLOAD_FAIL;
}
} else {
DP("There are %" PRId64 " bytes allocated at target address " DPxMOD
" - is%s last\n",
data_size, DPxPTR(TgtPtrBegin), (IsLast ? "" : " not"));
}
bool DelEntry = IsLast || ForceDelete;

12
openmp/libomptarget/src/private.h
View File

@ -80,9 +80,19 @@ typedef int (*TargetDataFuncPtrTy)(DeviceTy &, int32_t, void **, void **,
int64_t *, int64_t *, void **, __tgt_async_info *);
////////////////////////////////////////////////////////////////////////////////
// implementation for fatal messages
// implementation for messages
////////////////////////////////////////////////////////////////////////////////
#define MESSAGE0(_str) \
do { \
fprintf(stderr, "Libomptarget message: %s\n", _str); \
} while (0)
#define MESSAGE(_str, ...) \
do { \
fprintf(stderr, "Libomptarget message: " _str "\n", __VA_ARGS__); \
} while (0)
#define FATAL_MESSAGE0(_num, _str) \
do { \
fprintf(stderr, "Libomptarget fatal error %d: %s\n", _num, _str); \

42
openmp/libomptarget/test/mapping/present/target.c Normal file
View File

@ -0,0 +1,42 @@
// RUN: %libomptarget-compile-aarch64-unknown-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-aarch64-unknown-linux-gnu 2>&1 \
// RUN: | %fcheck-aarch64-unknown-linux-gnu
// RUN: %libomptarget-compile-powerpc64-ibm-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-powerpc64-ibm-linux-gnu 2>&1 \
// RUN: | %fcheck-powerpc64-ibm-linux-gnu
// RUN: %libomptarget-compile-powerpc64le-ibm-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-powerpc64le-ibm-linux-gnu 2>&1 \
// RUN: | %fcheck-powerpc64le-ibm-linux-gnu
// RUN: %libomptarget-compile-x86_64-pc-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-x86_64-pc-linux-gnu 2>&1 \
// RUN: | %fcheck-x86_64-pc-linux-gnu
#include <stdio.h>
int main() {
int i;
// CHECK: addr=0x[[#%x,HOST_ADDR:]], size=[[#%u,SIZE:]]
fprintf(stderr, "addr=%p, size=%ld\n", &i, sizeof i);
// CHECK-NOT: Libomptarget
#pragma omp target data map(alloc: i)
#pragma omp target map(present, alloc: i)
;
// CHECK: i is present
fprintf(stderr, "i is present\n");
// CHECK: Libomptarget message: device mapping required by 'present' map type modifier does not exist for host address 0x{{0*}}[[#HOST_ADDR]] ([[#SIZE]] bytes)
// CHECK: Libomptarget fatal error 1: failure of target construct while offloading is mandatory
#pragma omp target map(present, alloc: i)
;
// CHECK-NOT: i is present
fprintf(stderr, "i is present\n");
return 0;
}

42
openmp/libomptarget/test/mapping/present/target_data.c Normal file
View File

@ -0,0 +1,42 @@
// RUN: %libomptarget-compile-aarch64-unknown-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-aarch64-unknown-linux-gnu 2>&1 \
// RUN: | %fcheck-aarch64-unknown-linux-gnu
// RUN: %libomptarget-compile-powerpc64-ibm-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-powerpc64-ibm-linux-gnu 2>&1 \
// RUN: | %fcheck-powerpc64-ibm-linux-gnu
// RUN: %libomptarget-compile-powerpc64le-ibm-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-powerpc64le-ibm-linux-gnu 2>&1 \
// RUN: | %fcheck-powerpc64le-ibm-linux-gnu
// RUN: %libomptarget-compile-x86_64-pc-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-x86_64-pc-linux-gnu 2>&1 \
// RUN: | %fcheck-x86_64-pc-linux-gnu
#include <stdio.h>
int main() {
int i;
// CHECK: addr=0x[[#%x,HOST_ADDR:]], size=[[#%u,SIZE:]]
fprintf(stderr, "addr=%p, size=%ld\n", &i, sizeof i);
// CHECK-NOT: Libomptarget
#pragma omp target data map(alloc: i)
#pragma omp target data map(present, alloc: i)
;
// CHECK: i is present
fprintf(stderr, "i is present\n");
// CHECK: Libomptarget message: device mapping required by 'present' map type modifier does not exist for host address 0x{{0*}}[[#HOST_ADDR]] ([[#SIZE]] bytes)
// CHECK: Libomptarget fatal error 1: failure of target construct while offloading is mandatory
#pragma omp target data map(present, alloc: i)
;
// CHECK-NOT: i is present
fprintf(stderr, "i is present\n");
return 0;
}

41
openmp/libomptarget/test/mapping/present/target_enter_data.c Normal file
View File

@ -0,0 +1,41 @@
// RUN: %libomptarget-compile-aarch64-unknown-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-aarch64-unknown-linux-gnu 2>&1 \
// RUN: | %fcheck-aarch64-unknown-linux-gnu
// RUN: %libomptarget-compile-powerpc64-ibm-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-powerpc64-ibm-linux-gnu 2>&1 \
// RUN: | %fcheck-powerpc64-ibm-linux-gnu
// RUN: %libomptarget-compile-powerpc64le-ibm-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-powerpc64le-ibm-linux-gnu 2>&1 \
// RUN: | %fcheck-powerpc64le-ibm-linux-gnu
// RUN: %libomptarget-compile-x86_64-pc-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-x86_64-pc-linux-gnu 2>&1 \
// RUN: | %fcheck-x86_64-pc-linux-gnu
#include <stdio.h>
int main() {
int i;
// CHECK: addr=0x[[#%x,HOST_ADDR:]], size=[[#%u,SIZE:]]
fprintf(stderr, "addr=%p, size=%ld\n", &i, sizeof i);
// CHECK-NOT: Libomptarget
#pragma omp target enter data map(alloc: i)
#pragma omp target enter data map(present, alloc: i)
#pragma omp target exit data map(delete: i)
// CHECK: i is present
fprintf(stderr, "i is present\n");
// CHECK: Libomptarget message: device mapping required by 'present' map type modifier does not exist for host address 0x{{0*}}[[#HOST_ADDR]] ([[#SIZE]] bytes)
// CHECK: Libomptarget fatal error 1: failure of target construct while offloading is mandatory
#pragma omp target enter data map(present, alloc: i)
// CHECK-NOT: i is present
fprintf(stderr, "i is present\n");
return 0;
}

40
openmp/libomptarget/test/mapping/present/target_exit_data.c Normal file
View File

@ -0,0 +1,40 @@
// RUN: %libomptarget-compile-aarch64-unknown-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-aarch64-unknown-linux-gnu 2>&1 \
// RUN: | %fcheck-aarch64-unknown-linux-gnu
// RUN: %libomptarget-compile-powerpc64-ibm-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-powerpc64-ibm-linux-gnu 2>&1 \
// RUN: | %fcheck-powerpc64-ibm-linux-gnu
// RUN: %libomptarget-compile-powerpc64le-ibm-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-powerpc64le-ibm-linux-gnu 2>&1 \
// RUN: | %fcheck-powerpc64le-ibm-linux-gnu
// RUN: %libomptarget-compile-x86_64-pc-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-x86_64-pc-linux-gnu 2>&1 \
// RUN: | %fcheck-x86_64-pc-linux-gnu
#include <stdio.h>
int main() {
int i;
// CHECK: addr=0x[[#%x,HOST_ADDR:]], size=[[#%u,SIZE:]]
fprintf(stderr, "addr=%p, size=%ld\n", &i, sizeof i);
// CHECK-NOT: Libomptarget
#pragma omp target enter data map(alloc: i)
#pragma omp target exit data map(present, release: i)
// CHECK: i is present
fprintf(stderr, "i is present\n");
// CHECK: Libomptarget message: device mapping required by 'present' map type modifier does not exist for host address 0x{{0*}}[[#HOST_ADDR]] ([[#SIZE]] bytes)
// CHECK: Libomptarget fatal error 1: failure of target construct while offloading is mandatory
#pragma omp target exit data map(present, release: i)
// CHECK-NOT: i is present
fprintf(stderr, "i is present\n");
return 0;
}

41
openmp/libomptarget/test/mapping/present/unified_shared_memory.c Normal file
View File

@ -0,0 +1,41 @@
// RUN: %libomptarget-compile-aarch64-unknown-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-aarch64-unknown-linux-gnu 2>&1 \
// RUN: | %fcheck-aarch64-unknown-linux-gnu
// RUN: %libomptarget-compile-powerpc64-ibm-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-powerpc64-ibm-linux-gnu 2>&1 \
// RUN: | %fcheck-powerpc64-ibm-linux-gnu
// RUN: %libomptarget-compile-powerpc64le-ibm-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-powerpc64le-ibm-linux-gnu 2>&1 \
// RUN: | %fcheck-powerpc64le-ibm-linux-gnu
// RUN: %libomptarget-compile-x86_64-pc-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-x86_64-pc-linux-gnu 2>&1 \
// RUN: | %fcheck-x86_64-pc-linux-gnu
#include <stdio.h>
// The runtime considers unified shared memory to be always present.
#pragma omp requires unified_shared_memory
int main() {
int i;
// CHECK-NOT: Libomptarget
#pragma omp target data map(alloc: i)
#pragma omp target map(present, alloc: i)
;
// CHECK: i is present
fprintf(stderr, "i is present\n");
// CHECK-NOT: Libomptarget
#pragma omp target map(present, alloc: i)
;
// CHECK: is present
fprintf(stderr, "i is present\n");
return 0;
}

45
openmp/libomptarget/test/mapping/present/zero_length_array_section.c Normal file
View File

@ -0,0 +1,45 @@
// RUN: %libomptarget-compile-aarch64-unknown-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-aarch64-unknown-linux-gnu 2>&1 \
// RUN: | %fcheck-aarch64-unknown-linux-gnu
// RUN: %libomptarget-compile-powerpc64-ibm-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-powerpc64-ibm-linux-gnu 2>&1 \
// RUN: | %fcheck-powerpc64-ibm-linux-gnu
// RUN: %libomptarget-compile-powerpc64le-ibm-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-powerpc64le-ibm-linux-gnu 2>&1 \
// RUN: | %fcheck-powerpc64le-ibm-linux-gnu
// RUN: %libomptarget-compile-x86_64-pc-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-x86_64-pc-linux-gnu 2>&1 \
// RUN: | %fcheck-x86_64-pc-linux-gnu
#include <stdio.h>
int main() {
int arr[5];
// CHECK: addr=0x[[#%x,HOST_ADDR:]]
fprintf(stderr, "addr=%p\n", arr);
// CHECK-NOT: Libomptarget
#pragma omp target data map(alloc: arr[0:5])
#pragma omp target map(present, alloc: arr[0:0])
;
// CHECK: arr is present
fprintf(stderr, "arr is present\n");
// arr[0:0] doesn't create an actual mapping in the first directive.
//
// CHECK: Libomptarget message: device mapping required by 'present' map type modifier does not exist for host address 0x{{0*}}[[#HOST_ADDR]] (0 bytes)
// CHECK: Libomptarget fatal error 1: failure of target construct while offloading is mandatory
#pragma omp target data map(alloc: arr[0:0])
#pragma omp target map(present, alloc: arr[0:0])
;
// CHECK-NOT: arr is present
fprintf(stderr, "arr is present\n");
return 0;
}

43
openmp/libomptarget/test/mapping/present/zero_length_array_section_exit.c Normal file
View File

@ -0,0 +1,43 @@
// RUN: %libomptarget-compile-aarch64-unknown-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-aarch64-unknown-linux-gnu 2>&1 \
// RUN: | %fcheck-aarch64-unknown-linux-gnu
// RUN: %libomptarget-compile-powerpc64-ibm-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-powerpc64-ibm-linux-gnu 2>&1 \
// RUN: | %fcheck-powerpc64-ibm-linux-gnu
// RUN: %libomptarget-compile-powerpc64le-ibm-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-powerpc64le-ibm-linux-gnu 2>&1 \
// RUN: | %fcheck-powerpc64le-ibm-linux-gnu
// RUN: %libomptarget-compile-x86_64-pc-linux-gnu -fopenmp-version=51
// RUN: %libomptarget-run-fail-x86_64-pc-linux-gnu 2>&1 \
// RUN: | %fcheck-x86_64-pc-linux-gnu
#include <stdio.h>
int main() {
int arr[5];
// CHECK: addr=0x[[#%x,HOST_ADDR:]]
fprintf(stderr, "addr=%p\n", arr);
// CHECK-NOT: Libomptarget
#pragma omp target enter data map(alloc: arr[0:5])
#pragma omp target exit data map(present, release: arr[0:0])
// CHECK: arr is present
fprintf(stderr, "arr is present\n");
// arr[0:0] doesn't create an actual mapping in the first directive.
//
// CHECK: Libomptarget message: device mapping required by 'present' map type modifier does not exist for host address 0x{{0*}}[[#HOST_ADDR]] (0 bytes)
// CHECK: Libomptarget fatal error 1: failure of target construct while offloading is mandatory
#pragma omp target enter data map(alloc: arr[0:0])
#pragma omp target exit data map(present, release: arr[0:0])
// CHECK-NOT: arr is present
fprintf(stderr, "arr is present\n");
return 0;
}