OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [gcc/] [ssaexpand.h] - Blame information for rev 859

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 280 jeremybenn
/* Routines for expanding from SSA form to RTL.
2
   Copyright (C) 2009 Free Software Foundation, Inc.
3
 
4
This file is part of GCC.
5
 
6
GCC is free software; you can redistribute it and/or modify
7
it under the terms of the GNU General Public License as published by
8
the Free Software Foundation; either version 3, or (at your option)
9
any later version.
10
 
11
GCC is distributed in the hope that it will be useful,
12
but WITHOUT ANY WARRANTY; without even the implied warranty of
13
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14
GNU General Public License for more details.
15
 
16
You should have received a copy of the GNU General Public License
17
along with GCC; see the file COPYING3.  If not see
18
<http://www.gnu.org/licenses/>.  */
19
 
20
 
21
#ifndef _SSAEXPAND_H
22
#define _SSAEXPAND_H 1
23
 
24
#include "tree-ssa-live.h"
25
 
26
/* This structure (of which only a singleton SA exists) is used to
27
   pass around information between the outof-SSA functions, cfgexpand
28
   and expand itself.  */
29
struct ssaexpand
30
{
31
  /* The computed partitions of SSA names are stored here.  */
32
  var_map map;
33
 
34
  /* For an SSA name version V bit V is set iff TER decided that
35
     its definition should be forwarded.  */
36
  bitmap values;
37
 
38
  /* For a partition number I partition_to_pseudo[I] contains the
39
     RTL expression of the allocated space of it (either a MEM or
40
     a pseudos REG).  */
41
  rtx *partition_to_pseudo;
42
 
43
  /* If partition I contains an SSA name that has a default def,
44
     bit I will be set in this bitmap.  */
45
  bitmap partition_has_default_def;
46
};
47
 
48
/* This is the singleton described above.  */
49
extern struct ssaexpand SA;
50
 
51
/* Returns the RTX expression representing the storage of the outof-SSA
52
   partition that the SSA name EXP is a member of.  */
53
static inline rtx
54
get_rtx_for_ssa_name (tree exp)
55
{
56
  int p = partition_find (SA.map->var_partition, SSA_NAME_VERSION (exp));
57
  if (SA.map->partition_to_view)
58
    p = SA.map->partition_to_view[p];
59
  gcc_assert (p != NO_PARTITION);
60
  return SA.partition_to_pseudo[p];
61
}
62
 
63
/* If TER decided to forward the definition of SSA name EXP this function
64
   returns the defining statement, otherwise NULL.  */
65
static inline gimple
66
get_gimple_for_ssa_name (tree exp)
67
{
68
  int v = SSA_NAME_VERSION (exp);
69
  if (SA.values && bitmap_bit_p (SA.values, v))
70
    return SSA_NAME_DEF_STMT (exp);
71
  return NULL;
72
}
73
 
74
/* In tree-outof-ssa.c.  */
75
void finish_out_of_ssa (struct ssaexpand *sa);
76
unsigned int rewrite_out_of_ssa (struct ssaexpand *sa);
77
void expand_phi_nodes (struct ssaexpand *sa);
78
 
79
#endif

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.