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Message: [QUOTE="Edward A. Falk, post: 4215964"] A sufficiently smart compiler would realize that if y and z have no side-effects, then their computation can be deferred until they're needed. The above code would be optimized back to the original. Now if y and z do have side-effects, then this would indeed generate different code, forcing them to be evaluated when they might not have been in the original. Note that OP wanted to force evaluation of y and z in order to remove some expensive branches. However, I think that any analysis would show that the branches are cheaper than evaluating y and z in almost all cases. [/QUOTE]