https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89889
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> --- The code we have for promoting __BUILTIN_ALLOCA_WITH_ALIGN should be probably extended to also promote __BUILTIN_ALLOCA (or commented as to why we explicitely do not want to do that). See tree-ssa-ccp.c:fold_builtin_alloca_with_align
