Maybe one should add, that (as much I understood) it is a problem of the processor handling one specific (and rare) instruction. It does assume register depende

Maybe one should add, that (as much I understood) it is a problem of the processor handling one specific (and rare) instruction. It does assume register dependencies that do not exist. It was shown, that AMD does not have this behavior. And it shows, that today's processors are enormous complex beasts. The problem with the compilers was, that they where not aware of this behavior and thus generated sub-optimal code for this situation ... but compiler builders are also mere humans.