gcc/testsuite/gcc.c-torture/execute/990128-1.c

   1 extern int printf (const char *,...);
   2
   3 struct s { struct s *n; } *p;
   4 struct s ss;
   5 #define MAX     10
   6 struct s sss[MAX];
   7 int count = 0;
   8
   9 void sub( struct s *p, struct s **pp );
  10 int look( struct s *p, struct s **pp );
  11
  12 main()
  13 {
  14     struct s *pp;
  15     struct s *next;
  16     int i;
  17
  18     p = &ss;
  19     next = p;
  20     for ( i = 0; i < MAX; i++ ) {
  21         next->n = &sss[i];
  22         next = next->n;
  23     }
  24     next->n = 0;
  25
  26     sub( p, &pp );
  27     if (count != MAX+2)
  28       abort ();
  29
  30     exit( 0 );
  31 }
  32
  33 void sub( struct s *p, struct s **pp )
  34 {
  35    for ( ; look( p, pp ); ) {
  36         if ( p )
  37             p = p->n;
  38         else
  39             break;
  40    }
  41 }
  42
  43 int look( struct s *p, struct s **pp )
  44 {
  45     for ( ; p; p = p->n )
  46         ;
  47     *pp = p;
  48     count++;
  49     return( 1 );
  50 }