"A few days ago we found out that at the end of 2017 AMD
quietly released their AOCC 1.1 C/C++ compiler. AOCC is AMD's compiler
succeeding AMD Open64 that existed years ago as their optimized
Fortran/C/C++ compiler for past CPU microarchitectures while the "AMD
Optimizing C/C++ Compiler" is designed for current-generation Zen
processors. Here are benchmarks of the new AMD AOCC 1.1 release compared
to GCC 7, GCC 8, Clang 5.0, Clang 6.0, and Clang 7.0 SVN."