| Issue |
76121
|
| Summary |
[OpenMP] [Flang] Program crashes at runtime with Segmentation fault when OMP PARALLEL DO IF(.false.) is encountered
|
| Labels |
flang
|
| Assignees |
chandankds
|
| Reporter |
chandankds
|
Testcase to reproduce the issue.
```
PROGRAM parallel_do_if
USE OMP_LIB
INTEGER :: I
INTEGER :: N = 0
INTEGER, PARAMETER :: NI = 10
!$OMP PARALLEL DO IF(.false.)
DO I = 1, NI
END DO
!$OMP END PARALLEL DO
END PROGRAM
```
compile: flang-new -fopenmp ./test.f90 -o if.out
Run: ./if.out
Analysis: Segmentation fault is caused by null pointer dereference inside the __kmpc_fork_call_if function.
Triage: Issue introduced after https://github.com/llvm/llvm-project/pull/65436 . Testcase works as expected after removal of this patch.
Proposed Fix: Replace nullptr with struct of pointers to shared variables that aren't global
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