[FFmpeg-devel] [PATCH] fix some 'may be used uninitialized' warnings in AltiVec code

Luca Barbato lu_zero
Sat Mar 14 20:01:36 CET 2009

Diego Biurrun wrote:
> Here is a patch to silence some 'may be used uninitialized' warnings
> in our AltiVec optimizations.  The libpostproc part should be safe,
> the H.264 part depends on vec_perm, so I'm not entirely sure about it.

those "may be used uninitialized" are because that code just use part of
the vector and ignores the part that, in fact, are really uninitialized.

The patch seems fine.

> BTW, the files
> libavcodec/ppc/h264_altivec.c
> libavcodec/ppc/h264_template_altivec.c 
> contain massive code duplication between them.




Luca Barbato
Gentoo Council Member
Gentoo/linux Gentoo/PPC

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