[Bug libgomp/38935] Openmp reduction with - (minus) does not produce correct result

[subc2 at wp dot pl]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38935

--- Comment #2 from Paweł Zacharek <subc2 at wp dot pl> ---
GCC behaves correctly, according to OpenMP 4.0
(https://www.openmp.org/wp-content/uploads/OpenMP4.0.0.pdf#page=175) and OpenMP
4.5 (https://www.openmp.org/wp-content/uploads/openmp-4.5.pdf#page=211)
Specifications. The TR7 OpenMP 5.0 Draft hadn't changed that as well.