* Andrew Pinski: > The Ada front-end is still being missed compiled by VRP but VRP is doing > the correct thing as the type is signed and overflow on signed is > undefined > (-fwrapv is not turned on by default for Ada).
It probably makes sense to turn on -fwrapv for Ada because even without -gnato, the behavior is not really undefined: | The reason that we distinguish overflow checking from other kinds of | range constraint checking is that a failure of an overflow check can | generate an incorrect value, but cannot cause erroneous behavior. <http://gcc.gnu.org/onlinedocs/gcc-4.0.0/gnat_ugn_unw/Run_002dTime-Checks.html> (Without -fwrapv, integer overflow is undefined, and subsequent range checks can be optimized away, so that it might cause erroneous behavior.)
