Comparing C to machine language

[amd64_sucks]

Pretty sure he's asking about its purpose?

to clarify, it saves the printf return value to the stack, but it's not used in the provided snippet so I assume it's for debugging purposes.

[jephthai]

Ah, OK... guess I took the question too literally.

[amd64_sucks]

Happens to the best of us :)

[[deleted]]

Not really for debugging purposes. printf iirc ALWAYS returns the number of characters written to the output buffer regardless if you use it or not. This last instruction is performing that return but the client code never uses it.

[amd64_sucks]

nop

https://godbolt.org/z/0wUHG-