Five things you didn't realise your CPU did for you

We take our CPUs for granted. They're super fast executors of the code we wrote, right? They just do what we tell them. Or not! Here's five things you perhaps didn't realise your CPU was doing to make your code run even faster. Slides at: https://mattgodbolt.github.io/cpu5things/#/ In the video I refer to SSA form. In the processor literature this is called "register renaming" and differs in a number of ways from true SSA. However, it's interesting to note the similarities.