gcc/testsuite/gcc.c-torture/execute/20000815-1.c

   1 struct table_elt
   2 {
   3   void *exp;
   4   struct table_elt *next_same_hash;
   5   struct table_elt *prev_same_hash;
   6   struct table_elt *next_same_value;
   7   struct table_elt *prev_same_value;
   8   struct table_elt *first_same_value;
   9   struct table_elt *related_value;
  10   int cost;
  11   int mode;
  12   char in_memory;
  13   char in_struct;
  14   char is_const;
  15   char flag;
  16 };
  17
  18 struct write_data
  19 {
  20   int sp : 1;
  21   int var : 1;
  22   int nonscalar : 1;
  23   int all : 1;
  24 };
  25
  26 int cse_rtx_addr_varies_p(void *);
  27 void remove_from_table(struct table_elt *, int);
  28 static struct table_elt *table[32];
  29
  30 void
  31 invalidate_memory (writes)
  32      struct write_data *writes;
  33 {
  34   register int i;
  35   register struct table_elt *p, *next;
  36   int all = writes->all;
  37   int nonscalar = writes->nonscalar;
  38
  39   for (i = 0; i < 31; i++)
  40     for (p = table[i]; p; p = next)
  41       {
  42         next = p->next_same_hash;
  43         if (p->in_memory
  44             && (all
  45                 || (nonscalar && p->in_struct)
  46                 || cse_rtx_addr_varies_p (p->exp)))
  47           remove_from_table (p, i);
  48       }
  49 }
  50
  51 int cse_rtx_addr_varies_p(void *x) { return 0; }
  52 void remove_from_table(struct table_elt *x, int y) { abort (); }
  53
  54 int
  55 main()
  56 {
  57   struct write_data writes;
  58   struct table_elt elt;
  59
  60   __builtin_memset(&elt, 0, sizeof(elt));
  61   elt.in_memory = 1;
  62   table[0] = &elt;
  63
  64   __builtin_memset(&writes, 0, sizeof(writes));
  65   writes.var = 1;
  66   writes.nonscalar = 1;
  67
  68   invalidate_memory(&writes);
  69   return 0;
  70 }