https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78642
--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- I cannot reproduce on native and valgrind doesn't complain. Can you attach the first RTL dump which contains the problematic insn? (insn 196 94 197 (clobber (reg/i:SI 8 %o0 [24]))