"Spectre" is one of two notorious bugs of modern CPUs involving speculative execution. I rather doubt that VAX is affected by this but I suspect others here have a lot more knowledge.
paul > Begin forwarded message: > > From: co...@sdf.org > Subject: VAX + Spectre > Date: September 17, 2019 at 5:32:42 AM EDT > To: port-...@netbsd.org > > So, this is a bug report: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86811 > > GCC would like to know if VAX needs Spectre-related work. > Are any of the VAXes ever made capable of speculative execution? the > first tech for doing it was in 1967, so not entirely far-fetched.