[Bug tree-optimization/39455] [4.3/4.4 Regression] ICE : in compare_values_warnv, at tree-vrp.c:1073

[jakub at gcc dot gnu dot org]

------- Comment #7 from jakub at gcc dot gnu dot org  2009-03-16 08:15 -------
Reduced testcase:

/* { dg-do compile } */
/* { dg-options "-O2 -fprefetch-loop-arrays" } */

void
foo (char *x, unsigned long y, unsigned char *z)
{
  unsigned int c[256], *d;

  for (d = c + 1; d < c + 256; ++d)
    *d += d[-1];
  x[--c[z[y]]] = 0;
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39455