> Note carefully that the context here is size optimisation only. Indeed, and even if other benefits were once possible in the early x86 era, modern CPUs use r

> Note carefully that the context here is size optimisation only. Indeed, and even if other benefits were once possible in the early x86 era, modern CPUs use register renaming[0] which presumably would make such benefits redundant. [0]: https://en.wikipedia.org/wiki/Register_renaming https://en.wikipedia.org/wiki/Register_renaming