Hi!
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.
Bootstrapped/regtested on x86_64-linux and i686-linux, committed to trunk.
2021-10-27 Jakub Jelinek <ja...@redhat.com>
* libgomp.texi (OpenMP 5.0): Mention that Non-rectangular loop nests
aren't implemented for Fortran yet.
--- libgomp/libgomp.texi.jj 2021-10-21 10:23:27.605832433 +0200
+++ libgomp/libgomp.texi 2021-10-26 17:12:15.274870308 +0200
@@ -189,7 +189,7 @@ The OpenMP 4.5 specification is fully su
@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
Jakub
