gcc/testsuite/gcc.dg/uninit-pr81897-2.c

   1 /* { dg-do compile }  */
   2 /* { dg-options "-O1 -fno-tree-ccp -Wmaybe-uninitialized" } */
   3
   4 int oo;
   5
   6 void
   7 pc (int *tt)
   8 {
   9   int cf = 0;
  10
  11   if (*tt != 0)
  12     {
  13       if (0)
  14         {
  15           int *qg;
  16           int uj = 0;
  17
  18  t6:
  19           tt = &cf;
  20           if (oo != 0)
  21             {
  22               ++uj; /* { dg-warning "may be used uninit" } */
  23               *qg = !!oo && !!uj; /* { dg-warning "may be used uninit" } */
  24             }
  25         }
  26       cf = 0;
  27       goto t6;
  28     }
  29
  30   if (oo != 0)
  31     {
  32       *tt = 1;
  33       goto t6;
  34     }
  35 }