[Bug middle-end/118097] [15 regression] recent bug with -O2, but not -O1

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118097

--- Comment #18 from Sam James <sjames at gcc dot gnu.org> ---
I don't think it makes sense to be using -w when reducing, even if I agree that
the -w behaviour is irritating.