On 22 Mar 2015, at 23:04, Garrett Cooper <yaneurab...@gmail.com> wrote: > > On Mar 22, 2015, at 15:01, Craig Rodrigues <rodr...@freebsd.org> wrote: > > ... > >> OK, converting expr.y to use unsigned integers would require a bit of work. >> >> Can you commit your patch to the Makefile? It fixes the problem for now. > > +1 > > I’d still like to know why clang 3.5 doesn’t have this behavior though — > there might be other potential issues lurking around that need to be solved > (either here, in ports, or both).
Because this version optimizes better around undefined behavior. There are most likely many issues lurking around, and most certainly in ports. I would recommend using UBSan to tackle this kind of thing. -Dimitry
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