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Re: [PATCH] Don't fold away division by zero (PR middle-end/66127)
- From: Steve Ellcey <sellcey at imgtec dot com>
- To: Marek Polacek <polacek at redhat dot com>
- Cc: Joseph Myers <joseph at codesourcery dot com>, Jakub Jelinek <jakub at redhat dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>, Richard Biener <rguenther at suse dot de>
- Date: Thu, 14 May 2015 10:07:56 -0700
- Subject: Re: [PATCH] Don't fold away division by zero (PR middle-end/66127)
- Authentication-results: sourceware.org; auth=none
- References: <20150513191803 dot GG27320 at redhat dot com> <1431621764 dot 14613 dot 308 dot camel at ubuntu-sellcey>
- Reply-to: <sellcey at imgtec dot com>
On Thu, 2015-05-14 at 09:42 -0700, Steve Ellcey wrote:
> Marek,
>
> This may be unrelated to your patches for PR 66127 and 66066 but I am
> having a new failure when building the latest glibc with the latest GCC.
>
> I haven't yet tracked down exactly which patch caused the problem. Included
> is a cutdown test case from libio/memstream.c in glibc that results in a
> strict-aliasing error. Is this is something you already know about or have
> seen?
>
> In the mean time I will try to figure out exactly which patch caused this error
> to trigger.
>
> Steve Ellcey
> sellcey@imgtec.com
Sorry for the noise, it looks like this failure is not related to any
recent changes in GCC. I still get the error in older GCC's so I think
something must have changed in glibc. I will start digging there.
Steve Ellcey
sellcey@imgtec.com