[Bug target/41311] [4.5 regression] m68k - FFmpeg crashes when converting mpg to avi

["nospamname at web dot de" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #14 from nospamname at web dot de  2010-01-10 11:13 -------
All GCC Versions after this Patch r146817 (Author: matz) have the Problem

http://gcc.gnu.org/ml/gcc-cvs/2009-04/msg01459.html

Here is a better testprogram that show more exact what the code do, but this
generate with all Versions correct code.seem only with speical register usage
and maybe not relatet to backend Problem come.


#define __P(protos)     protos
int      fprintf __P((unsigned long *, const char *, ...));
unsigned int * stderr;
#define assert(expression)  \
  ((void) ((expression) ? 0 : __assert (expression, __FILE__, __LINE__)))

#define __assert(expression, file, line)  \
      (fprintf (stderr,"%s:%u: failed assertion `%s'\n", file,
line,expression),        \
       abort(), 0)

static double get_qscale(long *s, long *rce, double rate_factor, int frame_num)
{
return rate_factor*frame_num;
}

double get_diff_limited_q(long *s, long *rce, double q);

float ff_rate_estimate_qscale(double rate_factor, int picture_number)
{
long *s;
long *rce;
float q;
q= get_qscale(s, rce, rate_factor, picture_number);
        if (q < 0)
            return -1;

        assert(q>0.0);
         q = get_diff_limited_q(s, rce, q);
         assert(q>0.0);
}

int main(int argc, char **argv)
{
printf("%ld\n",ff_rate_estimate_qscale((float)argc,argc*4));
}


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41311