performance regression: inlining with constant arguments

[Kelley Cook]

Although I agree with your assesment that gcc 3.1 should still determine that
"cpu" is unchanging on its own, your code will do what you wish if if you simply
replace:

static inline void MC_avg1_8 (int height, char * dest, char * ref, int stride,
int cpu)
with

static inline void MC_avg1_8 (int height, char * dest, char * ref, int stride,
const int cpu)