------- Comment #8 from jean-marc dot valin at usherbrooke dot ca 2005-11-02
01:07 -------
OK, I'm not sure whether it's the same bug but when compiling the following
code with
% gcc-4.1-20051029 -O2 -ftree-loop-linear -c vq.c
int vq_index(float *in, const float *codebook, int len, int entries)
{
int i,j;
float min_dist=0;
int best_index=0;
for (i=0;i<entries;i++)
{
float dist=0;
for (j=0;j<len;j++)
{
float tmp = in[j]-*codebook++;
dist += tmp*tmp;
}
if (i==0 || dist<min_dist)
{
min_dist=dist;
best_index=i;
}
}
return best_index;
}
The main difference is that the above example with quant_lsp.c only gets
triggered at -O3, whereas vq.c triggers the bug at -O2. Both files are part of
the same software (Speex) BTW.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24309
