https://bugs.llvm.org/show_bug.cgi?id=45117
Bug ID: 45117
Summary: Orphaned task reduction should be allowed.
Product: OpenMP
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Clang Compiler Support
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Created attachment 23205
--> https://bugs.llvm.org/attachment.cgi?id=23205&action=edit
Bug reproducer.
OpenMP specification allows task reduction to be orphaned. Issue reported by
Olivier, Stephen Lecler (SNL), and confirmed by other members of OpenMP
language committee.
Blog article link:
https://developers.redhat.com/blog/2019/03/19/whats-new-in-openmp-5-0/
To reproduce:
$ clang -fopenmp omp_task_red_orphaned.c
omp_task_red_orphaned.c:14:35: error: in_reduction variable must appear in a
task_reduction clause
#pragma omp task in_reduction(+:r) firstprivate(i, th_gen)
^
omp_task_red_orphaned.c:19:35: error: in_reduction variable must appear in a
task_reduction clause
#pragma omp task in_reduction(+:r) firstprivate(i, th_gen)
^
2 errors generated.
There is also corresponding bug in the runtime library prevented the test to
run to completion, the fix for which posted for review:
https://reviews.llvm.org/D75673.
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