storage.h

   1 #ifndef STORAGE_H
   2 #define STORAGE_H
   3
   4 /*
   5  * The "storage" that underlies an incoming/outgoing pseudo. It's
   6  * basically the backing store for a pseudo, and may be a real hw
   7  * register, a stack slot or a static symbol. Or nothing at all,
   8  * since some pseudos can just be recalculated on the fly.
   9  */
  10 enum storage_type {
  11         REG_UDEF,
  12         REG_REG,
  13         REG_STACK,
  14         REG_SYM,
  15         REG_ARG,
  16         REG_BAD,
  17 };
  18
  19 enum inout_enum {
  20         STOR_IN,
  21         STOR_OUT
  22 };
  23
  24 struct storage;
  25 DECLARE_PTR_LIST(storage_ptr_list, struct storage *);
  26
  27 struct storage {
  28         enum storage_type type;
  29         pseudo_t pseudo;
  30         struct storage_ptr_list *users;
  31         union {
  32                 int regno;
  33                 int offset;
  34                 struct symbol *sym;
  35         };
  36 };
  37
  38 DECLARE_PTR_LIST(storage_list, struct storage);
  39
  40 struct storage_hash {
  41         struct basic_block *bb;
  42         pseudo_t pseudo;
  43         enum inout_enum inout;
  44         struct storage *storage;
  45 };
  46
  47 DECLARE_PTR_LIST(storage_hash_list, struct storage_hash);
  48
  49 extern struct storage_hash_list *gather_storage(struct basic_block *, enum inout_enum);
  50 extern void free_storage(void);
  51 extern const char *show_storage(struct storage *);
  52 extern void set_up_storage(struct entrypoint *);
  53
  54 DECLARE_ALLOCATOR(storage);
  55 DECLARE_ALLOCATOR(storage_hash);
  56
  57 static inline struct storage *alloc_storage(void)
  58 {
  59         return __alloc_storage(0);
  60 }
  61
  62 static inline struct storage_hash *alloc_storage_hash(struct storage *s)
  63 {
  64         struct storage_hash *entry = __alloc_storage_hash(0);
  65         struct storage **usep = &entry->storage;
  66
  67         *usep = s;
  68         add_ptr_list(&s->users, usep);
  69         return entry;
  70 }
  71
  72 #endif /* STORAGE_H */