[Bug testsuite/65594] libgomp.graphite/force-parallel-6.c timeout

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65594

--- Comment #4 from vries at gcc dot gnu.org ---
(In reply to Jakub Jelinek from comment #2)
> Well, GOMP_parallel doesn't always create new threads, but still it has some
> synchronization overhead etc.  IMNSHO the testcase should be scaled down for
> the testsuite, IMHO lowering N to 100 would be in order.

Lowering N to 400 or lower introduces this failure:
...
FAIL: libgomp.graphite/force-parallel-6.c scan-tree-dump-times optimized
"loopfn.0" 4
...

When N drops below (MIN_PER_THREAD * N_THREADS) ==  (100 * 4), the loopfn.0 is
still created, but is already unreachable and the call to the function is
removed during the following omp expand.