nsz Git - libfirm/blob - ir/be/beuses.h

   1 /**
   2  * @file   beuse.h
   3  * @date   27.06.2005
   4  * @author Sebastian Hack, Matthias Braun
   5  *
   6  * Determine future usages of values.
   7  *
   8  * Copyright (C) 2005 Universitaet Karlsruhe
   9  * Released under the GPL
  10  */
  11 #ifndef _BEUSES_H
  12 #define _BEUSES_H
  13
  14 #include "bearch_t.h"
  15 #include "belive.h"
  16
  17 typedef struct _be_next_use_t {
  18         unsigned time;
  19         int outermost_loop;
  20 } be_next_use_t;
  21
  22 #define USES_INFINITY                 10000000
  23 #define USES_PENDING                   9999999
  24
  25 static INLINE int USES_IS_INFINITE(unsigned time)
  26 {
  27         return time >= USES_INFINITY;
  28 }
  29
  30 static INLINE int USES_IS_PENDING(unsigned time)
  31 {
  32         return time == USES_PENDING;
  33 }
  34
  35 typedef struct _be_uses_t be_uses_t;
  36
  37 be_next_use_t be_get_next_use(be_uses_t *uses, ir_node *from,
  38                          unsigned from_step, const ir_node *def,
  39                          int skip_from_uses);
  40
  41 be_uses_t *be_begin_uses(ir_graph *irg, const be_lv_t *lv);
  42
  43 void be_end_uses(be_uses_t *uses);
  44
  45 #endif /* _BEUSES_H */