On Mon, 2011-07-25 at 21:08 -0400, Arnaud Lacombe wrote: > Hi, > > but the code generated seem to test %esi (`b', potentially > uninitialized) before %ebx (`a'). Am I still missing something ? But it tests 'a' again afterward. If 'a' is 0, it doesn't matter what 'b' was. So the uninitialized test is a wash. No harm done, except for some wasted CPU cycles. -- Steve