[Python-Dev] FYI: Python 2.7.1 + gcc 4.6 (experimental) probable optimizer problem

Stefan Krah stefan at bytereef.org
Sun Jan 9 00:44:37 CET 2011

Antoine Pitrou <solipsis at pitrou.net> wrote:
> > I can reproduce this with release27-maint on Fedora-14/amd64/gcc-4.6.
> > -fno-strict-aliasing is enabled.
> It might be interesting to have a buildbot with a bleeding edge
> toolchain. Although in this case nobody rushed to diagnose the
> three-month old issue anyway:

I narrowed the issue down to -ftree-vectorize, which is part of -O3.
Searching briefly for 'ftree-vectorize + bug' makes me think that
we should wait for the stable gcc-4.6.

Stefan Krah

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