[Bug tree-optimization/60902] [4.9/4.10 Regression] ffmpeg built with gcc 4.9 RC produces incorrect flac playback code

[law at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60902

--- Comment #22 from Jeffrey A. Law <law at redhat dot com> ---
I'm still working my way through the code, but it looks like we're mucking up
the value for "buf" and "k".  Not really sure if that's the root cause is just
a downstream effect.  Anyway, once the buf computation goes awry bad the
callers start to see unexpected results and the bogus errors.