------- Comment #10 from mmitchel at gcc dot gnu dot org 2010-08-17 17:50 ------- The problem with -Wuninitialized might be the same problem I've been sermonizing about for years -- we're trying to issue sensible warnings from our optimizers, which means that as the optimizers are perturbed, the set of warnings will change in various ways. But, there's no reason for -Wuninitialized to warn about a use of an empty structure, so I don't see why removing the stores is unreasonable.
I certainly think that the front-end could safely optimize away such stores, and that it would be reasonably easy to do so in the trivial cases. (Obviously, the optimizers would be responsible for more complex cases where things are not perhaps immediately obvious to the front-end.) I don't think there's any reason we don't do that in the front-end; it's just something we haven't done. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45307
