https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113070
--- Comment #4 from Alex Coplan <acoplan at gcc dot gnu.org> --- So debugging the PGO/LTO failure of cactuBSSN (from SPEC CPU 2017) shows that we can miss updating uses immediately following an stp insn in the case that we insert a new stp insn (as opposed to updating an existing one). That can then lead to wrong code as alias analysis goes wrong as a result. I'm planning on fixing that and hopefully this will turn out to be the same issue.
