[Bug tree-optimization/111276] rewrite_to_defined_overflow rewrites already defined code

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111276

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think the API expects to be guarded to only be called on stmts that require
rewriting.