| Issue |
136294
|
| Summary |
OpenMP array shaping failing test case
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
ravurvi20
|
The test case fails to compile due to unsupported array shaping operations in #pragma omp target update.
Testcase:
```
#pragma omp begin declare target
int do_work(double *a, int nx, int ny);
int other_work(double *a, int nx, int ny);
#pragma omp end declare target
void exch_data(double *a, int nx, int ny);
void array_ing(double *a, int nx, int ny)
{
// map data to device and do work
#pragma omp target data map(a[0:nx*(ny+2)])
{
// do work on the device
#pragma omp target // map(a[0:nx*(ny+2)]) itional here
do_work(a, nx, ny);
// update boundary poins (two column 2D array) on the host
// pointer is shaped to 2D array using the shape-operator
#pragma omp target update from( (([nx][ny+2])a)[0:nx][1], \
(([nx][ny+2])a)[0:nx][ny] )
// exchange ghost points with neighbors
exch_data(a, nx, ny);
// update ghost points (two column 2D array) on the device
// pointer is shaped to 2D array using the shape-operator
#pragma omp target update to( (([nx][ny+2])a)[0:nx][0], \
(([nx][ny+2])a)[0:nx][ny+1] )
// perform other work on the device
#pragma omp target // map(a[0:nx*(ny+2)]) is optional here
other_work(a, nx, ny);
}
}
```
```
array.c:18:34: error: OpenMP array shaping operation is not allowed here
18 | #pragma omp target update from( (([nx][ny+2])a)[0:nx][1], \
| ^
array.c:19:34: error: OpenMP array shaping operation is not allowed here
19 | (([nx][ny+2])a)[0:nx][ny] )
| ^
array.c:18:2: error: expected at least one 'to' clause or 'from' clause specified to '#pragma omp target update'
18 | #pragma omp target update from( (([nx][ny+2])a)[0:nx][1], \
| ^
array.c:26:32: error: OpenMP array shaping operation is not allowed here
26 | #pragma omp target update to( (([nx][ny+2])a)[0:nx][0], \
| ^
array.c:27:32: error: OpenMP array shaping operation is not allowed here
27 | (([nx][ny+2])a)[0:nx][ny+1] )
| ^
array.c:26:2: error: expected at least one 'to' clause or 'from' clause specified to '#pragma omp target update'
26 | #pragma omp target update to( (([nx][ny+2])a)[0:nx][0], \
| ^
6 errors generated.
```
Environment Info:
OpenMP version - 5.0/5.1/5.2
Compiler - clang version 21.0.0
[Godbolt](https://godbolt.org/z/5MKcKMePb)
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