https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71885
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |trippels at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
See https://gcc.gnu.org/gcc-6/porting_to.html (More aggressive optimization of
-flifetime-dse).
You're invoking undefined behavior; -flifetime-dse=1 is a workaround.