gcc/testsuite/gcc.dg/pr42719.c

   1 /* PR tree-optimization/42719 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -ftracer -fcompare-debug" } */
   4
   5 int *v;
   6
   7 void
   8 foo (int a)
   9 {
  10   int i, j;
  11   for (j = i = a; i != -1; j = i, i = v[i])
  12     ;
  13   v[j] = v[a];
  14 }