| Issue |
144563
|
| Summary |
[flang][OpenMP] Invalid restriction for linear(ref(x))
|
| Labels |
flang
|
| Assignees |
|
| Reporter |
eugeneepshteyn
|
Test file:
```
subroutine test(omega0, g, tau)
!$omp declare simd(test) notinbranch linear(ref(omega0)) linear(ref(tau)) linear(ref(g))
real, intent(inout) :: omega0
real, intent(inout) :: g
real, intent(inout) :: tau
end subroutine test
```
Compile:
```
$ flang -c -fopenmp omp-linear-ref.f90
flang-21: warning: OpenMP support in flang is still experimental [-Wexperimental-option]
error: Semantic errors in omp-linear-ref.f90
./omp-linear-ref.f90:2:49: error: The list item `omega0` specified with the REF 'linear-modifier' must be polymorphic variable, assumed-shape array, or a variable with the `ALLOCATABLE` attribute
!$omp declare simd(test) notinbranch linear(ref(omega0)) linear(ref(tau)) linear(ref(g))
^^^^^^
./omp-linear-ref.f90:2:69: error: The list item `tau` specified with the REF 'linear-modifier' must be polymorphic variable, assumed-shape array, or a variable with the `ALLOCATABLE` attribute
!$omp declare simd(test) notinbranch linear(ref(omega0)) linear(ref(tau)) linear(ref(g))
^^^
./omp-linear-ref.f90:2:86: error: The list item `g` specified with the REF 'linear-modifier' must be polymorphic variable, assumed-shape array, or a variable with the `ALLOCATABLE` attribute
!$omp declare simd(test) notinbranch linear(ref(omega0)) linear(ref(tau)) linear(ref(g))
^
```
I checked OpenMP 5.2 and 6.0 specs, and I don't see that "REF 'linear-modifier' must be polymorphic variable, assumed-shape array, or a variable with the `ALLOCATABLE` attribute". I see that `ref` must be a dummy argument and must not have `value` attribute.
`ref` seems to be deprecated and checking with a recent ifx compiler result in `This form of the OpenMP* LINEAR clause is deprecated.` warning, but not an error.
Compiler version:
```
$ flang --version
flang version 21.0.0git (https://github.com/eugeneepshteyn/llvm-project.git 71f72f4d5d1b820a3e6147289547821332eaf115)
Target: x86_64-unknown-linux-gnu
Thread model: posix
...
Build config: +unoptimized, +assertions
```
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