On 28 September 2011 00:41, Jeffrey Walton <noloader@xxxxxxxxx> wrote: > Hi All, > > What is the preferred way to tame the optimizer when two class > functions are producing incorrect results? Fix your code ;-) > There's not much to the class - its a vector with copy semantics. So > it mirrors all vector's public functions, and forwards calls through > the internal vector pointer. The pointer is a boost shared_ptr. > > -O2 is giving problems. -O0 is OK, Intel ICC is OK, and Visual Studio is OK. As suggested at http://gcc.gnu.org/bugs/ you can try -fno-strict-aliasing and -fwrapv, if they help your code is broken. You can also turn off other individual optimisations with -fno-foobar, see the manual for the various optimizations that are active at -O1 and -O2 > Jeff >
