[x264-devel] Re: [patch] AMD64 support for x264 codec

[Josef Zlomek]

> It works nicely with gcc -O1, but if I set -O2 or higher I get a segfault 
> (gdb log attached). I have no idea what's causing this; the log seems 
> impossible to me.

I have run into this too (with gcc 3.3.5).
It looks like a bug in compiler that miscompiles some function, probably
refine_subpel.
GCC flags "-O3 -fno-expensive-optimizations" work fine for me.

Josef

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