https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68654
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> --- Interesting the only effect could be different GC allocation pattern because the non-splice variant may end up re-allocating the target vector multiple times. But this alone should never change code generation. So - can you share a preprocessed file where code generation changes with this revision?