https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85052
--- Comment #9 from Matthias Kretz <kretz at kde dot org> --- (In reply to Devin Hussey from comment #7) > Wait, silly me, this isn't about optimizations, this is about patterns. Regarding optimizations, PR85048 is a first step (it lists all x86 single-instruction SIMD conversions). I also linked my library implementation in #5, which provides optimizations for all cases on x86.