derek.holloway
7502bf64a4
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72 lines
2.1 KiB
Fortran
72 lines
2.1 KiB
Fortran
! Small regression test that checks that we do not cause a runtime map error in
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! cases where we are required to allocate a local variable for the fortran
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! descriptor to store into and then load from it, done so by reusing the
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! temporary local variable across all maps related to the mapped variable and
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! associated local variable to make sure that each map does as it is intended
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! to do with the original data. This prevents blobs of local descriptor data
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! remaining attached on device long after it's supposed to, which can cause
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! weird map issues later in susbequent function invocations. However, it
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! doesn't avoid a user shooting themselves in the foot by mapping data via
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! enter and then not providing a corresponding exit.
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! REQUIRES: flang, amdgpu
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! RUN: %libomptarget-compile-fortran-run-and-check-generic
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subroutine launchOne(n1, n2, ret)
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implicit none
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real, intent(out) :: ret
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real(4), dimension(n1,n2) :: sbuf31
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integer :: n1,n2
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!$omp target enter data map(alloc:sbuf31)
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!$omp target
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sbuf31(2, 2) = 10
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!$omp end target
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!$omp target update from(sbuf31)
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ret = sbuf31(2, 2)
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!$omp target exit data map(delete:sbuf31)
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end subroutine launchOne
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subroutine launchTwo(N, ret)
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implicit none
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real, intent(inout) :: ret
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integer :: N
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real(4), dimension(N) :: p
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!$omp target enter data map(to:p)
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!$omp target
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p(8) = 20
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!$omp end target
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!$omp target update from(p)
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ret = ret + p(8)
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! intentional non-deletion, can trigger an illegal map
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! issue in cases where the local map we store and load
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! from for the variable is different across all maps.
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! Not too sure why this is the thing that triggers the
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! problem in general. It seems like it would be an issue
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! made apparent with and without this statement commented,
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! especially as the issue occurs with the enter and not the
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! corresponding exit (from the runtime trace at least).
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!!$omp target exit data map(delete:p)
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end subroutine launchTwo
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program reproducer
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implicit none
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integer :: N = 10
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integer :: nr = 10, nt = 10
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real :: output = 0
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call launchOne(nr, nt, output)
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call launchTwo(N, output)
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print *, output
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end program reproducer
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! CHECK: 30
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