https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66917
--- Comment #5 from ktkachov at gcc dot gnu.org --- The slp2 dump at tree level says about the ap pointer: base_address: ap_2(D) offset from base address: 0 constant offset from base address: 0 step: 0 aligned to: 64 base_object: MEM[(char * {ref-all})ap_2(D)] That looks dodgy?