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openmp: Document that non-rect loops are not supported in Fortran yet 

I've found we claim to support non-rectangular loops, but don't actually
support those in Fortran, as can be seen on:
  integer i, j
  !$omp parallel do collapse(2)
  do i = 0, 10
    do j = 0, i
    end do
  end do
end
To support this, the Fortran FE needs to allow the valid forms of
non-rectangular loops and disallow others, so mainly it needs its
updated version of c-omp.c c_omp_check_loop_iv etc., plus for non-rectangular
lb or ub expressions emit a TREE_VEC instead of normal expression as the C/C++ FE
do, plus testsuite coverage.

2021-10-27  Jakub Jelinek  <jakub@redhat.com>

	* libgomp.texi (OpenMP 5.0): Mention that Non-rectangular loop nests
	aren't implemented for Fortran yet.
This commit is contained in:
Jakub Jelinek 2021-10-27 09:24:46 +02:00
parent 2084b5f42a
commit eef8114906
1 changed files with 1 additions and 1 deletions
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libgomp/libgomp.texi
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@ -189,7 +189,7 @@ The OpenMP 4.5 specification is fully supported.
@item @code{requires} directive @tab P
@tab Only fulfillable requirement is @code{atomic_default_mem_order}
@item @code{teams} construct outside an enclosing target region @tab Y @tab
@item Non-rectangular loop nests @tab Y @tab
@item Non-rectangular loop nests @tab P @tab Only C/C++
@item @code{!=} as relational-op in canonical loop form for C/C++ @tab Y @tab
@item @code{nonmonotonic} as default loop schedule modifier for worksharing-loop
constructs @tab Y @tab