https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86081
--- Comment #1 from ptdrnvqd at 10mail dot org --- either might be a factor: -floop-interchange -floop-strip-mine -floop-block
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86081
--- Comment #1 from ptdrnvqd at 10mail dot org --- either might be a factor: -floop-interchange -floop-strip-mine -floop-block