Draft: Clang OpenMP Target Problems

[rchen20]

Summary

• This PR is a bugfix IN PROGRESS
• Clang + OpenMPTarget has all sorts of problems:
  • Running in to this internal clang error in single-loop-tile-icount-tcount Clang omp-target cannot select error. #1274. No versions of clang (up to 14.0.5) can resolve this. May need to try newer clang.
  • With the previous set of tests removed, compilation is successful with 14.0.5, but all OpenMPTarget tests fail at runtime. It appears that mem copies are not transferring enough data. There are also some missing memcpy's, but adding them does not resolve many of the errors.
  • The alternative of using Desul atomics does not resolve Clang omp-target cannot select error. #1274.
  • N.B. XLC can compile all tests successfully.

List of failing tests:

         33 - test-forall-IndexSet-OpenMPTarget.exe (Subprocess aborted)                                                                                                                                                                                                                                     [25/1657]
         34 - test-forall-IcountIndexSet-OpenMPTarget.exe (Failed)
         45 - test-forall-ListSegment-OpenMPTarget.exe (Subprocess aborted)
         46 - test-forall-RangeSegment-OpenMPTarget.exe (Failed)
         47 - test-forall-RangeStrideSegment-OpenMPTarget.exe (Failed)
         56 - test-forall-ListSegmentView-OpenMPTarget.exe (Subprocess aborted)
         57 - test-forall-RangeSegmentView-OpenMPTarget.exe (Failed)
         58 - test-forall-RangeSegment2DView-OpenMPTarget.exe (Failed)
         88 - test-forall-basic-ReduceSum-OpenMPTarget.exe (Subprocess aborted)
        119 - test-forall-resource-ListSegment-OpenMPTarget.exe (Subprocess aborted)
        120 - test-forall-resource-RangeSegment-OpenMPTarget.exe (Failed)
        121 - test-forall-resource-RangeStrideSegment-OpenMPTarget.exe (Failed)
        128 - test-forall-CombiningAdapter-1D-OpenMPTarget.exe (Failed)
        129 - test-forall-CombiningAdapter-2D-OpenMPTarget.exe (Failed)
        130 - test-forall-CombiningAdapter-3D-OpenMPTarget.exe (Failed)
        135 - test-forall-atomic-basic-OpenMPTarget.exe (Subprocess aborted)
        136 - test-forall-atomic-basic-unsigned-OpenMPTarget.exe (Subprocess aborted)
        141 - test-forall-AtomicMultiView-OpenMPTarget.exe (Subprocess aborted)
        155 - test-forall-AtomicRefAdd-OpenMPTarget.exe (Subprocess aborted)
        156 - test-forall-AtomicRefCAS-OpenMPTarget.exe (Failed)
        168 - test-kernel-resource-basic-single-loop-Segments-OpenMPTarget.exe (Failed)
        169 - test-kernel-basic-single-loop-Segments-OpenMPTarget.exe (Failed)
        172 - test-kernel-basic-single-icount-loop-OpenMPTarget.exe (Failed)
        175 - test-kernel-basic-fission-fusion-loop-OpenMPTarget.exe (Failed)
        178 - test-kernel-conditional-fission-fusion-loop-OpenMPTarget.exe (Failed)
        191 - test-kernel-nested-loop-Basic-OpenMPTarget.exe (Failed)
        218 - test-kernel-nested-loop-PermutedOffsetView2D-OpenMPTarget.exe (Failed)
        219 - test-kernel-nested-loop-PermutedOffsetView3D-OpenMPTarget.exe (Failed)
        234 - test-kernel-tile-Fixed2D-OpenMPTarget.exe (Failed)
        274 - test-workgroup-Unordered-Single-IndirectFunction-OpenMPTarget.exe (Failed)
        275 - test-workgroup-Unordered-MultipleReuse-IndirectFunction-OpenMPTarget.exe (Failed)
        276 - test-workgroup-Unordered-Single-IndirectVirtual-OpenMPTarget.exe (Failed)
        277 - test-workgroup-Unordered-MultipleReuse-IndirectVirtual-OpenMPTarget.exe (Failed)
        278 - test-workgroup-Unordered-Single-Direct-OpenMPTarget.exe (Failed)
        279 - test-workgroup-Unordered-MultipleReuse-Direct-OpenMPTarget.exe (Failed)
        486 - test-reducer-constructors-openmp-target.exe (Failed)
        498 - test-resource-Depends-OpenMPTarget.exe (Failed)
        499 - test-resource-MultiStream-OpenMPTarget.exe (Subprocess aborted)
        501 - test-resource-BasicAsyncSemantics-OpenMPTarget.exe (Subprocess aborted)
        502 - test-resource-JoinAsyncSemantics-OpenMPTarget.exe (Subprocess aborted)
        545 - test-workgroup-Enqueue-Single-Direct-OpenMPTarget.exe (Failed)
        546 - test-workgroup-Enqueue-Multiple-Direct-OpenMPTarget.exe (Failed)
        547 - test-workgroup-Enqueue-Single-IndirectFunction-OpenMPTarget.exe (Failed)
        548 - test-workgroup-Enqueue-Multiple-IndirectFunction-OpenMPTarget.exe (Failed)
        549 - test-workgroup-Enqueue-Single-IndirectVirtual-OpenMPTarget.exe (Failed)
        550 - test-workgroup-Enqueue-Multiple-IndirectVirtual-OpenMPTarget.exe (Failed)