https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94613
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- Why is it not correct to split the insn the way you describe? I see nothing wrong with that - the use of r115 is still under r110 == 0. Is the issue that r115 is re-used and r115 has more than a single use?