Re: [PATCH] Add __int128 test to ubsan

[Jakub Jelinek]

On Tue, Dec 17, 2013 at 07:16:18PM +0100, Marek Polacek wrote:
> On Tue, Dec 17, 2013 at 06:50:24PM +0100, Jakub Jelinek wrote:
> > Isn't this undefined behavior in C?  I mean, shouldn't you
> > shift up (unsigned __int128) 1 and only cast to (__int128) at the end?
> 
> Oh my, how could I.
> 
> Yeah, (__int128) 1 << 127 is UB.  Fixed below, ok now?

Ok.

> 2013-12-17  Marek Polacek  <pola...@redhat.com>
> 
> testsuite/:
>       * c-c++-common/ubsan/overflow-int128.c: New test.

        Jakub