g++ and aliasing bools

[Richard Kenner]

    Optimizations have high priorities (cf. regular patches and
    discussions about such and such Intermdiate Language Tranformations).
    It may be that an optimization like alias analysis doesn't have the
    highest priority but that doesn't mean notbody isn't consider it --

Indeed, I strongly suspect that if it were possible to do better alias
set handling in C++, it would produce a far larger performance
improvement than any of the Intermediate Language Transformations
being discussed and would also likely be a lot less work.