[Bug tree-optimization/54094] ICE in graphite-dependences.c:320 : isl_constraint.c:497: position out of bounds

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54094



--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> 2012-12-06 
16:44:44 UTC ---

Reduced testcase:



void dwt_deinterleave_h(int *a, int *b, int dn, int sn, int cas) 

{

  int i;

  for (i=0; i<sn; i++)

    b[i]=a[2*i+cas];

  for (i=0; i<dn; i++)

    b[sn+i]=a[(2*i+1-cas)];

}



fails with -O2 -floop-parallelize-all -floop-nest-optimize