* omp-low.c (check_omp_nesting_restrictions): Allow cancel or
cancellation point with taskgroup clause inside of taskloop. Consider
a taskloop construct without nogroup clause as implicit taskgroup for
diagnostics if cancel/cancellation point with taskgroup clause is
closely nested inside of taskgroup region.
* c-c++-common/gomp/cancel-1.c (f2): Add various taskloop related
tests.
* testsuite/libgomp.c-c++-common/cancel-taskgroup-4.c: New test.
From-SVN: r266722
daa8c1d763