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 hardware
   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_FRAME,
  15         REG_SYM,
  16         REG_ARG,
  17         REG_BAD,
  18 };
  19
  20 enum inout_enum {
  21         STOR_IN,
  22         STOR_OUT
  23 };
  24
  25 struct storage;
  26 DECLARE_PTR_LIST(storage_ptr_list, struct storage *);
  27
  28 struct storage {
  29         enum storage_type type;
  30         int name;
  31         struct storage_ptr_list *users;
  32         union {
  33                 int regno;
  34                 int offset;
  35                 struct symbol *sym;
  36         };
  37 };
  38
  39 DECLARE_PTR_LIST(storage_list, struct storage);
  40
  41 struct storage_hash {
  42         struct basic_block *bb;
  43         pseudo_t pseudo;
  44         enum inout_enum inout;
  45         struct storage *storage;
  46         unsigned long flags;
  47 };
  48
  49 DECLARE_PTR_LIST(storage_hash_list, struct storage_hash);
  50
  51 extern struct storage_hash_list *gather_storage(struct basic_block *, enum inout_enum);
  52 extern void free_storage(void);
  53 extern const char *show_storage(struct storage *);
  54 extern void set_up_storage(struct entrypoint *);
  55 struct storage *lookup_storage(struct basic_block *, pseudo_t, enum inout_enum);
  56 void add_storage(struct storage *, struct basic_block *, pseudo_t, enum inout_enum);
  57
  58 DECLARE_ALLOCATOR(storage);
  59 DECLARE_ALLOCATOR(storage_hash);
  60
  61 static inline struct storage *alloc_storage(void)
  62 {
  63         return __alloc_storage(0);
  64 }
  65
  66 static inline struct storage_hash *alloc_storage_hash(struct storage *s)
  67 {
  68         struct storage_hash *entry = __alloc_storage_hash(0);
  69         struct storage **usep = &entry->storage;
  70
  71         *usep = s;
  72         add_ptr_list(&s->users, usep);
  73         return entry;
  74 }
  75
  76 #endif /* STORAGE_H */