hi, all i could not find an answer to this question on the net so i'm posting it here. as far as i know, the Ansi C standard does not specify the order of evaluation of expression arguments. so if i wrote: x = f() + g() it would be up to the compiler whether f() or g() would be called first. my question is, does anybody know how does the current version of gcc choose whether to call f() or g() first? on which optimization options does this depend, if any? after making a few experiments, it looks like gcc usually does left-to-right evaluation (first calls f() and then g()). so i would like to know in which cases (if any) this would not be true. or if this information is not known for the current version, then for any previous version would also be appreciated. to clarify: i am not interested in the evaluation order of arguments to a function call, or left vs right side of an assigment. also i am not interested in expressions involving pre- or post- increment or decrement or anything such. i understand that these may be a problem. so my question is only regarding function calls in expressions with normal arithmetic (also pointer arithmetic) and compare operators. laura -- +++ NEU bei GMX und erstmalig in Deutschland: TÜV-geprüfter Virenschutz +++ 100% Virenerkennung nach Wildlist. Infos: http://www.gmx.net/virenschutz
