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From: Tobias Burnus <burnus@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r11-7648] Fortran/OpenMP: Fix use_device_{ptr, addr} with assumed-size array [PR98858] Date: Fri, 12 Mar 2021 15:33:17 +0000 (GMT) [thread overview] Message-ID: <20210312153317.76E3E398E45B@sourceware.org> (raw) https://gcc.gnu.org/g:0b5437510c13dc0879349a4f259c800d2ce02eb2 commit r11-7648-g0b5437510c13dc0879349a4f259c800d2ce02eb2 Author: Tobias Burnus <tobias@codesourcery.com> Date: Fri Mar 12 16:33:02 2021 +0100 Fortran/OpenMP: Fix use_device_{ptr,addr} with assumed-size array [PR98858] gcc/ChangeLog: PR fortran/98858 * gimplify.c (omp_add_variable): Handle NULL_TREE as size occuring for assumed-size arrays in use_device_{ptr,addr}. libgomp/ChangeLog: PR fortran/98858 * testsuite/libgomp.fortran/use_device_ptr-3.f90: New test. Diff: --- gcc/gimplify.c | 2 +- .../testsuite/libgomp.fortran/use_device_ptr-3.f90 | 91 ++++++++++++++++++++++ 2 files changed, 92 insertions(+), 1 deletion(-) diff --git a/gcc/gimplify.c b/gcc/gimplify.c index caf25ccdd5c..6da66985ad6 100644 --- a/gcc/gimplify.c +++ b/gcc/gimplify.c @@ -7078,7 +7078,7 @@ omp_add_variable (struct gimplify_omp_ctx *ctx, tree decl, unsigned int flags) if ((flags & GOVD_SHARED) == 0) { t = TYPE_SIZE_UNIT (TREE_TYPE (TREE_TYPE (decl))); - if (DECL_P (t)) + if (t && DECL_P (t)) omp_notice_variable (ctx, t, true); } } diff --git a/libgomp/testsuite/libgomp.fortran/use_device_ptr-3.f90 b/libgomp/testsuite/libgomp.fortran/use_device_ptr-3.f90 new file mode 100644 index 00000000000..f2b33cd5e89 --- /dev/null +++ b/libgomp/testsuite/libgomp.fortran/use_device_ptr-3.f90 @@ -0,0 +1,91 @@ +! PR fortran/98858 +! +! Assumed-size array with use_device_ptr() +! +program test_use_device_ptr + use iso_c_binding, only: c_ptr, c_loc, c_f_pointer + implicit none + double precision :: alpha + integer, parameter :: lda = 10 + integer, allocatable :: mat(:, :) + integer :: i, j + + allocate(mat(lda, lda)) + do i = 1, lda + do j = 1, lda + mat(j,i) = i*100 + j + end do + end do + + !$omp target enter data map(to:mat) + call dgemm(lda, mat) + !$omp target exit data map(from:mat) + + do i = 1, lda + do j = 1, lda + if (mat(j,i) /= -(i*100 + j)) stop 1 + end do + end do + + !$omp target enter data map(to:mat) + call dgemm2(lda, mat) + !$omp target exit data map(from:mat) + + do i = 1, lda + do j = 1, lda + if (mat(j,i) /= (i*100 + j)) stop 1 + end do + end do + + contains + + subroutine dgemm(lda, a) + implicit none + integer :: lda + integer, target:: a(lda,*) ! need target attribute to use c_loc + !$omp target data use_device_ptr(a) + call negate_it(c_loc(a), lda) + !$omp end target data + end subroutine + + subroutine dgemm2(lda, a) + implicit none + integer :: lda + integer, target:: a(lda,*) ! need target attribute to use c_loc + !$omp target data use_device_addr(a) + call negate_it(c_loc(a), lda) + !$omp end target data + end subroutine + + subroutine negate_it(a, n) + type(c_ptr), value :: a + integer, value :: n + integer, pointer :: array(:,:) + + ! detour due to OpenMP 5.0 oddness + call c_f_pointer(a, array, [n,n]) + call do_offload(array, n) + end + + subroutine do_offload(aptr, n) + integer, target :: aptr(:,:) + integer, value :: n + !$omp target is_device_ptr(aptr) + call negate_it_tgt(aptr, n) + !$omp end target + end subroutine do_offload + + subroutine negate_it_tgt(array, n) + !$omp declare target + integer, value :: n + integer :: array(n,n) + integer :: i, j + !$omp parallel do collapse(2) + do i = 1, n + do j = 1, n + array(j,i) = - array(j,i) + end do + end do + !$omp end parallel do + end subroutine +end program
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