[Bug rtl-optimization/68381] [6 Regression] wrong code and quality regression with __builtin_mul_overflow() @ aarch64

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68381

--- Comment #6 from ktkachov at gcc dot gnu.org ---
The correctness issue has been fixed.
I'll keep this open for now to investigate the missed optimisation