* target.c (struct gomp_coalesce_buf): New type.
(MAX_COALESCE_BUF_SIZE, MAX_COALESCE_BUF_GAP): Define.
(gomp_coalesce_buf_add, gomp_to_device_kind_p): New functions.
(gomp_copy_host2dev): Add CBUF argument, if copying into
the cached ranges, memcpy into buffer instead of copying
into device.
(gomp_map_vars_existing, gomp_map_pointer, gomp_map_fields_existing):
Add CBUF argument, pass it through to other calls.
(gomp_map_vars): Aggregate copies from host to device if small enough
and with small enough gaps in between into memcpy into a buffer and
fewer host to device copies from the buffer.
(gomp_update): Adjust gomp_copy_host2dev caller.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@254194 138bc75d-0d04-0410-961f-82ee72b054a4