[gomp4] add support for derived types in ACC UPDATE

[Cesar Philippidis]

OpenACC 2.0a has limited support for fortran derived types. Basically,
derived type variables are only supported in ACC UPDATE. Rather than
adding generalized support for derived times in the gimplifier, this
patch has the fortran FE pass both subarrays and arrays as void pointers
with an appropriate OMP_CLAUSE_SIZE. ACC UPDATE is an executable
directive, and the gimplifier would just end up pruning out all of the
unnecessary supporting data clauses otherwise.

As of right now, GCC still lacks support for non-contiguous subarray
arguments to ACC UPDATE. I'm not sure why it was decided to let ACC
UPDATE support non-contiguous subarrays, but it already is an oddball
with its lone support for derived types.

This patch has been committed to gomp-4_0-branch.

Cesar
-------------- next part --------------
A non-text attachment was scrubbed...
Name: gomp4-update-dt.diff
Type: text/x-patch
Size: 21594 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20161110/2f316d4c/attachment.bin>