[3/3] OpenACC reductions
Mon Nov 2 16:38:00 GMT 2015
This patch are the initial set of tests. The libgomp tests use an idiom of
summing thread identifiers and then checking the expected set of threads
participated. They are all derived from the loop tests I recently added for the
execution model itself.
The fortran test was duplicated in both the gfortran testsuite and the libgomp
testsuite. I deleted it from the former. It was slightly bogus as it asked
for a vector-length of 40, and appeared to be working by accident by not
actually partitioning the loop. I fixed that up and reworked it to avoid
needing a reduction on a reference variable. Reference handling will be a later
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