https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116662
--- Comment #9 from Jeffrey A. Law <law at gcc dot gnu.org> --- So the question in my mind, how important is this? On modern kernels & toolchains it's possible to query the cboz extension & its block size which effectively gives you the size of a cache line. But not every design has the cboz extension, so we'd have to have a fallback if we went the route of dynamic discovery. Or we could just update the constant. 64b cache lines are likely going to be the sweet spot for a while. I wouldn't lose sleep just setting it to 64bit and getting on with our lives.
