1  /* Spurious uninit variable warnings, case 4.
       2     Simplified version of cppexp.c (cpp_parse_expr).
       3  
       4     This one is really fragile, it gets it right if you take out case
       5     1, or if the structure is replaced by an int, or if the structure
       6     has fewer members (!) */
       7  
       8  /* { dg-do compile } */
       9  /* { dg-options "-O -Wuninitialized" } */
      10  
      11  extern void abort (void);
      12  
      13  struct operation {
      14      short op;
      15      char rprio;
      16      char flags;
      17      char unsignedp;
      18      long value;
      19  };
      20  
      21  extern struct operation cpp_lex (void);
      22  
      23  void
      24  cpp_parse_expr (void)
      25  {
      26    int rprio; /* { dg-bogus "rprio" "uninitialized variable warning PR19833" } */
      27    struct operation op;
      28  
      29    for (;;)
      30      {
      31        op = cpp_lex ();
      32  
      33        switch (op.op)
      34  	{
      35  	case 0:
      36  	  break;
      37  	case 1:
      38  	  return;
      39  	case 2:
      40  	  rprio = 1;
      41  	  break;
      42  	default:
      43  	  return;
      44  	}
      45  
      46        if (op.op == 0)
      47  	return;
      48  
      49        if (rprio != 1)
      50  	abort();
      51      }
      52  }