[Bug middle-end/59470] [4.8 Regression] libstdc++ miscompilation after r205709

[vmakarov at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59470

--- Comment #18 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #13)
> Strange.  From my limited testing, it does fix the regressions.  I can fire
> off now full scratch rpm builds with your patch.

Sorry. My bad. I did not rebuild the library (I rebuilt only compiler) when I
tested it.

In general, the probability of this bug is quite tiny so many conditions must
come up for this.  That is why we found it only recently.  Thanks for working
on it, Jakub.  Your analysis helped me a lot.  You can commit it into gcc-4.8
and gcc-4.9.