https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53593
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- here is the latest link: https://www.intel.com/content/www/us/en/docs/dpcpp-cpp-compiler/developer-guide-reference/2024-1/prefetch-noprefetch.html So reading the page, it is only can be used when AVX512 is enabled now. Before back in 2012 it was just for IA64 and then MiC was added and both have been removed the documentation (as both are long gone).
