https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62012
--- Comment #1 from Yuri Rumyantsev <ysrumyan at gmail dot com> --- Created attachment 33241 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33241&action=edit test-case to reproduce Options to compile are: -Ofast -m64 -march=core-avx2 -fopenmp and macros -DPARAM can be used to get vectorizable version of test.
