Claire Xen  🏳️‍⚧️ 🏳️‍🌈 🧙🏻‍♀️ BLM  🏴 🚩

I don't understand this example; why would the nop order pizza? Wouldn't the nop long be finished before the write to misa happened?

You haven't fully understand undefined behavior yet. I envy you.. Don't google "undefined behavior causality". It's better this way.. :)

That Google hint seems to mostly be for C compilers; I assume you mean "the whole program becomes undefined if there's even one case of UB"?

No! I said don't google that! :) UB has nothing to do with C compilers specifically. But it's unsurprising that this get most hits. 1/

But yes, UB does not mean "we don't define what happens when X (with X being something like div by zero)". UB means we only define behavior

for programs/systems/whatever that do not do X. If this happens anywhere, all bets are off. Same with a CPU. This is different from things