test/outglob.c

   1 int x1, x2, x3;
   2
   3 int g()
   4 {
   5   return x1 + x2 + x3; /* 1. uses x3 before definition */
   6 }
   7
   8 int f()
   9 {
  10   int loc;
  11
  12   if (3 > 4)
  13     {
  14       loc = 3;
  15       return x1; /* 2, 3, 4. bad --- x1 not defined, x2, x3 not defined */
  16     }
  17   else
  18     {
  19       if (4 > 6)
  20         {
  21           loc = x1;  /* 5. x1 not defined */
  22           loc = g(); /* 6. bad --- x1, x2 not defined before call (defines x2 and x3) */
  23           loc = x3;
  24         }
  25       else if (2 > 3)
  26         {
  27           loc = x3; /* 7. x3 not defined */
  28           x1 = 6;
  29           x2 = 7;
  30           return g();
  31         }
  32       else
  33         {
  34           x1 = 6;
  35           x2 = 7;
  36
  37           return 12; /* 8. returns with x3 not defined */
  38         }
  39     }
  40
  41   return 12;
  42   /* No errors to report.  Previously,
  43         [9, 10. returns with x2 and x3 undefined (x1 IS defined on all branches!)]
  44      but this is not correct; all branches that can reach the return do define
  45      x1, x2 and x3.
  46   */
  47 }
  48
  49 int h (void)
  50 {
  51   return x1; /* okay */
  52 }
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