On Thu, Aug 20, 2015 at 08:17:27PM -0400, Stephen Powell wrote:
> On Sat, 15 Aug 2015 05:44:42 -0400 (EDT), Mike Hommey wrote:
> > ...
> > The current version of Iceweasel in unstable fails to build because of
> > an internal error in the javascript engine which looks like it could be
> > caused by some miscompilation.
> > ...
> > I was able to narrow it down as follows:
> > ...
> > - Building js/src/Parser.o with a #pragma GCC optimize("O0") at the
> > beginning fixes it.
> > - Then I was able to go down at the function level, whereby moving the
> > following function at the end of the file and preceding it with the
> > pragma above fixes it:
> > template <>
> > /* static */ bool
> > Parser<FullParseHandler>::bindLexical(BindData<FullParseHandler>* data,
> > HandlePropertyName name,
> > Parser<FullParseHandler>* parser)
> >
> > (somehow, adding a #pragma GCC optimize("O3") after a O0 one doesn't
> > raise optimization level for the rest of the file, what's why I
> > double checked by moving the function)
> >
> > Could someone with s390x assembly knowledge look at the assembly for
> > that function and narrow it down further, possibly filing a GCC bug?
>
> If you will produce a compiler listing that shows the generated machine
> language and pseudo-assembly language for the problem piece of code,
> both for the good case and the failing case, and send me a link to it,
> I'll take a look at it. I can't promise you success, but I'll look at it.
Sorry, I missed the answer because I'm not subscribed and forgot to check
the ML.
I'm not sure how useful this is going to be, but here you are:
https://people.debian.org/~glandium/Parser.o.tar.gz
Mike
