3.6.1 patch nomination: r230564 - only propagate equality comparisons of FP values that we are certain are non-zero

[Tom Stellard]

Sanjay, Hal,

Do either of you think this is OK for the 3.6 branch?

http://llvm.org/viewvc/llvm-project?view=revision&revision=230564

Thanks,
Tom

On Tue, Apr 14, 2015 at 09:41:08AM +0100, Simon Byrne wrote:
> I'm just wanted to ping this again before the RC. Is there any chance
> this could make 3.6.1?
> 
> Simon
> 
> On 12 March 2015 at 23:56, Hans Wennborg <hans at chromium.org> wrote:
> > +Tom for 3.6.1.
> >
> > On Sun, Mar 8, 2015 at 6:58 AM, Simon Byrne <simonbyrne at gmail.com> wrote:
> >> I would like to nominate patch r230564 for backporting to the 3.6
> >> branch. As it stands currently, the gvn pass in 3.6.0 can sometimes
> >> result in invalid changes to the sign of floating point zeros: see,
> >> for example,
> >> http://llvm.org/bugs/show_bug.cgi?id=22823
> >> and the related Julia thread,
> >> https://github.com/JuliaLang/julia/issues/10377
> >>
> >> Thank you,
> >> Simon
> >> _______________________________________________
> >> llvm-commits mailing list
> >> llvm-commits at cs.uiuc.edu
> >> http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits