Do compilers produce better code for do-while loops versus other types of loops?

Question

There\'s a comment in the zlib compression library (which is used in the Chromium project among many others) which implies that a do-while loop in C generates "better&q

Answer 1

Is there any evidence that most (or any) compilers would generate better (e.g. more efficient) code?

Not much, unless you look at the actual generated assembly of an actual, specific compiler on a specific platform with some specific optimization settings.

This was probably worth worrying about decades ago (when ZLib has been written), but certainly not nowadays, unless you found, by real profiling, that this removes a bottleneck from your code.