[Bug libgomp/81805] Another libgomp.c/for-5.c failure on nvptx -- illegal memory access

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81805

--- Comment #10 from Tom de Vries <vries at gcc dot gnu.org> ---
[ Redoing https://gcc.gnu.org/ml/gcc-bugs/2017-08/msg01333.html, using PR81875
instead of PR81844, since PR81844 was overwritten ]

Filed comment 3 as PR81875 - omp for loop optimized away

This PR remains for the analysis of the test-case from comment 0.