https://llvm.org/bugs/show_bug.cgi?id=30855
Bug ID: 30855
Summary: Merge r277991 into the 3.9 branch
Product: OpenMP
Version: unspecified
Hardware: Macintosh
OS: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: Runtime Library
Assignee: unassignedb...@nondot.org
Reporter: howarth.mailing.li...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
I would like to propose merging the change...
r277991 | hahnfeld | 2016-08-08 06:08:07 -0400 (Mon, 08 Aug 2016) | 24 lines
__kmp_free_task: Fix for serial explicit tasks producing proxy tasks
Consider the following code which may be executed by a serial team:
int dep;
#pragma omp target nowait depend(out: dep)
{
sleep(1);
}
#pragma omp task depend(in: dep)
{
#pragma omp target nowait
{
sleep(1);
}
}
Here the explicit task may not be freed until the nested proxy task has
finished. The current code hasn't considered this and called __kmp_free_task
anyway which triggered an assert because of remaining incomplete children:
KMP_DEBUG_ASSERT( TCR_4(taskdata->td_incomplete_child_tasks) == 0 );
Differential Revision: https://reviews.llvm.org/D23115
to 3.9 branch for the 3.9.1 release
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