https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70903
--- Comment #2 from ktkachov at gcc dot gnu.org --- -fno-rerun-cse-after-loop "fixes" the tescase. cse2 is where it starts to go wrong
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70903
--- Comment #2 from ktkachov at gcc dot gnu.org --- -fno-rerun-cse-after-loop "fixes" the tescase. cse2 is where it starts to go wrong