Assertion fail on OpenMP runtime

[simoatze]

Two tests (task-two and parallel-reduction-nowait) are failing because of:

OMP: Error #13: Assertion failure at kmp_sched.cpp(85).

[simoatze]

@jprotze do you have any idea why?

[jprotze]

Yes, to provide a conforming implementation, we had to introduce compiler support. With old compilers, the flag is not set with a valid value, which results in the assert.
There is a deprecated-workshare branch, that changes this assert to a warning about an outdated compiler.

[dongahn]

Can we cherry-pick that?

[jprotze]

I'm currently pushing this patch to upstream (I guess it will land in the next few days):
https://reviews.llvm.org/D39890

Until then, you can simply use the branch for testing: https://github.com/OpenMPToolsInterface/LLVM-openmp/tree/deprecated-workshare

@simoatze : With that fix in upstream LLVM, you can switch to the upstream LLVM/OpenMP runtime.

[simoatze]

@jprotze Thanks! I tried the deprecated-workshare and it passes all the tests.
I'll switch to the upstream LLVM/OpenMP and do more tests.

[jprotze]

The patch landed in upstream llvm/OpenMP about an hour ago.