gcc/testsuite/gcc.c-torture/execute/20021204-1.c

   1 /* This test was miscompiled when using sibling call optimization,
   2    because X ? Y : Y - 1 optimization changed X into !X in place
   3    and haven't reverted it if do_store_flag was successful, so
   4    when expanding the expression the second time it was
   5    !X ? Y : Y - 1.  */
   6
   7 extern void abort (void);
   8 extern void exit (int);
   9
  10 void foo (int x)
  11 {
  12   if (x != 1)
  13     abort ();
  14 }
  15
  16 int z;
  17
  18 int main (int argc, char **argv)
  19 {
  20   char *a = "test";
  21   char *b = a + 2;
  22
  23   foo (z > 0 ? b - a : b - a - 1);
  24   exit (0);
  25 }