gcc/testsuite/gcc.dg/tree-ssa/20030907-1.c

   1 /* PR optimization/12198
   2
   3    This was a miscompilation of a switch expressions because
   4    the "Case Ranges" extension wasn't handled in tree-cfg.c.  */
   5
   6 /* { dg-do compile } */
   7 /* { dg-options "-O -fdump-tree-optimized" } */
   8
   9 extern void abort (void);
  10 extern void exit (int);
  11
  12 int main()
  13 {
  14    int i;
  15    i = 2;
  16    switch (i)
  17       {
  18       case 1 ... 5:
  19          goto L1;
  20       default:
  21          abort ();
  22          goto L1;
  23       }
  24    L1:
  25    exit(0);
  26 }
  27
  28 /* The abort() call clearly is unreachable.  */
  29 /* { dg-final { scan-tree-dump-times "abort" 0 "optimized"} } */
  30 /* { dg-final { cleanup-tree-dump "optimized" } } */