| Issue |
140732
|
| Summary |
[flang][OpenMP] Missing pre-determined DSA for static duration variables
|
| Labels |
flang:openmp
|
| Assignees |
|
| Reporter |
tblah
|
```
module test_mod
complex :: tm3a/(0,0)/
contains
subroutine f4()
!$omp task
!$omp task
tm3a = (1, 2)
!$omp end task
!$omp end task
!$omp taskwait
print *,tm3a
end subroutine
end module
program main
use test_mod
call f4()
end program
```
```
flang -fopenmp test.f90 -o out && ./out
```
This should print `(1, 2)` not `(0, 0)`. The problem that flang is currently setting `tm3a` to FIRSTPRIVATE.
The relevant section is 7.1.1 of [OpenMP 6.0](https://www.openmp.org/wp-content/uploads/OpenMP-API-Specification-6-0.pdf).
There is one rule saying that variables with static storage duration are **predetermined** as SHARED. Another rule for **implicitly determined** DSA, "in a task-generating construct, if no default clause is present, a variable for which the data-sharing attribute is not determined by the rules above is firstprivate".
My interpretation of this is that the rule for predetermined DSA takes precedence and `tm3a` should be SHARED.
![]()
_______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
