Yeah, coming across compiler bugs does happen - but more often it's bugs in input programs. (one of the reasons compiler engineers aren't likely to jump on reproducing and reducing misbehaving programs, because on the odds, it's not a bug in the compiler)
On Fri, Oct 25, 2019 at 3:12 PM Hans Åberg <haber...@telia.com> wrote: > The sources are available at [1]; it is written in C, not C++. I was was > hoping that that something like UBSan would shed light on it, but the > original question is answered: it changes optimization. The GMP developers > say that they have caught some compiler bugs, but that is hard to do and > time consuming. > > 1. https://gmplib.org > > > > On 25 Oct 2019, at 23:38, David Blaikie <dblai...@gmail.com> wrote: > > > > It's hard to know if it's the compiler's fault without a test case - due > to the nature of undefined behavior and other things (implementation > defined behavior and unspecified behavior) in C++, that the program behaves > as expected with another compiler or another set of flags doesn't give a > strong indication as to where the problem is (in the code, in one of the > compilers, etc). > > > >
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