nsz Git - libfirm/blob - ir/be/beinfo.c

   1 /*
   2  * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
   3  *
   4  * This file is part of libFirm.
   5  *
   6  * This file may be distributed and/or modified under the terms of the
   7  * GNU General Public License version 2 as published by the Free Software
   8  * Foundation and appearing in the file LICENSE.GPL included in the
   9  * packaging of this file.
  10  *
  11  * Licensees holding valid libFirm Professional Edition licenses may use
  12  * this file in accordance with the libFirm Commercial License.
  13  * Agreement provided with the Software.
  14  *
  15  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  16  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE.
  18  */
  19
  20 /**
  21  * @file
  22  * @author      Matthias Braun
  23  * @version     $Id$
  24  */
  25 #include "config.h"
  26
  27 #include "beinfo.h"
  28 #include "bearch_t.h"
  29 #include "irgwalk.h"
  30 #include "irnode_t.h"
  31 #include "error.h"
  32
  33 static copy_attr_func  old_phi_copy_attr;
  34
  35 void be_info_new_node(ir_node *node)
  36 {
  37         struct obstack *obst;
  38         backend_info_t *info;
  39         sched_info_t   *sinfo;
  40
  41         if (is_Anchor(node))
  42                 return;
  43
  44         obst  = get_irg_obstack(current_ir_graph);
  45         info  = obstack_alloc(obst, sizeof(*info));
  46         sinfo = &info->sched_info;
  47
  48         memset(info, 0, sizeof(*info));
  49
  50         sinfo->idx = get_irn_idx(node);
  51         INIT_LIST_HEAD(&sinfo->list);
  52
  53         if (is_Phi(node)) {
  54                 info->out_infos = NEW_ARR_D(reg_out_info_t, obst, 1);
  55                 memset(info->out_infos, 0, 1 * sizeof(info->out_infos[0]));
  56         }
  57         assert(node->backend_info == NULL);
  58         node->backend_info = info;
  59 }
  60
  61 static void new_Phi_copy_attr(const ir_node *old_node, ir_node *new_node)
  62 {
  63         struct obstack *obst  = get_irg_obstack(get_irn_irg(new_node));
  64         backend_info_t *old_info = be_get_info(old_node);
  65         backend_info_t *new_info = be_get_info(new_node);
  66
  67         old_phi_copy_attr(old_node, new_node);
  68         new_info->out_infos = DUP_ARR_D(reg_out_info_t, obst, old_info->out_infos);
  69 }
  70
  71 int be_info_equal(const ir_node *node1, const ir_node *node2)
  72 {
  73         backend_info_t *info1 = be_get_info(node1);
  74         backend_info_t *info2 = be_get_info(node2);
  75         int             len   = ARR_LEN(info1->out_infos);
  76         int             i;
  77
  78         if (ARR_LEN(info2->out_infos) != len)
  79                 return 0;
  80
  81         for (i = 0; i < len; ++i) {
  82                 const reg_out_info_t *out1 = &info1->out_infos[i];
  83                 const reg_out_info_t *out2 = &info2->out_infos[i];
  84                 if (out1->reg != out2->reg)
  85                         return 0;
  86                 if (!reg_reqs_equal(out1->req, out2->req))
  87                         return 0;
  88         }
  89
  90         /* TODO: in reqs */
  91
  92         return 1;
  93 }
  94
  95 static void init_walker(ir_node *node, void *data)
  96 {
  97         (void) data;
  98         be_info_new_node(node);
  99 }
 100
 101 static int initialized = 0;
 102
 103 void be_info_init(void)
 104 {
 105         if (initialized == 1)
 106                 panic("double initialization of be_info");
 107
 108         old_phi_copy_attr = op_Phi->ops.copy_attr;
 109         op_Phi->ops.copy_attr = new_Phi_copy_attr;
 110         initialized = 1;
 111 }
 112
 113 void be_info_init_irg(ir_graph *irg)
 114 {
 115         irg_walk_anchors(irg, init_walker, NULL, NULL);
 116 }
 117
 118 void be_info_free(void)
 119 {
 120         if (!initialized)
 121                 panic("be_info_free called without prior init");
 122
 123         assert(op_Phi->ops.copy_attr == new_Phi_copy_attr);
 124         op_Phi->ops.copy_attr = old_phi_copy_attr;
 125         initialized = 0;
 126 }
 127
 128 int be_info_initialized(const ir_graph *irg)
 129 {
 130         (void) irg;
 131         return initialized;
 132 }