[Bug tree-optimization/96672] Missing -Wclobbered diagnostic, or: __attribute__((returns_twice)) does not inhibit constant folding across call site

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96672

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Most likely the patch which moves the warning to gimple would help here:
https://gcc.gnu.org/pipermail/gcc-patches/2019-October/530995.html

But I have not seen any movement on it since last year but I could be wrong.