1  /* Spurious uninitialized variable warnings.
       2     This one inspired by java/class.c:build_utf8_ref.  */
       3  
       4  /* { dg-do compile } */
       5  /* { dg-options "-O -Wuninitialized" } */
       6  
       7  #include <stddef.h>
       8  
       9  struct tree
      10  {
      11      struct tree *car;
      12      struct tree *cdr;
      13      int type, data;
      14  };
      15  
      16  extern void *malloc(size_t);
      17  
      18  #define INTEGER_T 1
      19  #define PTR_T	  2
      20  
      21  #define APPEND(TREE, LAST, TYPE, VALUE)				\
      22  do {								\
      23       struct tree *tmp = malloc (sizeof (struct tree));		\
      24       tmp->car = 0; tmp->cdr = 0; tmp->type = TYPE;		\
      25       tmp->data = VALUE;						\
      26       if (TREE->car)						\
      27  	 LAST->cdr = tmp;					\
      28       else							\
      29  	 TREE->car = tmp;					\
      30       LAST = tmp;						\
      31  } while(0)
      32   
      33  struct tree *
      34  make_something(int a, int b, int c)
      35  {
      36      struct tree *rv;
      37      struct tree *field;
      38  
      39      rv = malloc (sizeof (struct tree));
      40      rv->car = 0;
      41  
      42      APPEND(rv, field, INTEGER_T, a);  /* { dg-bogus "field" "uninitialized variable warning" } */
      43      APPEND(rv, field, PTR_T, b);
      44      APPEND(rv, field, INTEGER_T, c);
      45  
      46      return rv;
      47  }