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 <stdbool.h>
  28
  29 #include "beinfo.h"
  30 #include "bearch.h"
  31 #include "benode_t.h"
  32 #include "irgwalk.h"
  33 #include "irnode_t.h"
  34 #include "error.h"
  35
  36 static copy_attr_func  old_phi_copy_attr;
  37
  38 void be_info_new_node(ir_node *node)
  39 {
  40         struct obstack *obst;
  41         backend_info_t *info;
  42
  43         if (is_Anchor(node))
  44                 return;
  45
  46         if (is_Proj(node)) // Projs need no be info, their tuple holds all information
  47                 return;
  48
  49         obst  = get_irg_obstack(current_ir_graph);
  50         info  = OALLOCZ(obst, backend_info_t);
  51
  52         if (is_Phi(node)) {
  53                 info->out_infos = NEW_ARR_D(reg_out_info_t, obst, 1);
  54                 memset(info->out_infos, 0, 1 * sizeof(info->out_infos[0]));
  55         }
  56         assert(node->backend_info == NULL);
  57         node->backend_info = info;
  58 }
  59
  60 static void new_Phi_copy_attr(const ir_node *old_node, ir_node *new_node)
  61 {
  62         struct obstack *obst  = get_irg_obstack(get_irn_irg(new_node));
  63         backend_info_t *old_info = be_get_info(old_node);
  64         backend_info_t *new_info = be_get_info(new_node);
  65
  66         old_phi_copy_attr(old_node, new_node);
  67         new_info->out_infos = DUP_ARR_D(reg_out_info_t, obst, old_info->out_infos);
  68 }
  69
  70 int be_info_equal(const ir_node *node1, const ir_node *node2)
  71 {
  72         backend_info_t *info1 = be_get_info(node1);
  73         backend_info_t *info2 = be_get_info(node2);
  74         int             len   = ARR_LEN(info1->out_infos);
  75         int             i;
  76
  77         if (ARR_LEN(info2->out_infos) != len)
  78                 return 0;
  79
  80         for (i = 0; i < len; ++i) {
  81                 const reg_out_info_t *out1 = &info1->out_infos[i];
  82                 const reg_out_info_t *out2 = &info2->out_infos[i];
  83                 if (out1->reg != out2->reg)
  84                         return 0;
  85                 if (!reg_reqs_equal(out1->req, out2->req))
  86                         return 0;
  87         }
  88
  89         /* TODO: in reqs */
  90
  91         return 1;
  92 }
  93
  94 static void init_walker(ir_node *node, void *data)
  95 {
  96         (void) data;
  97         be_info_new_node(node);
  98 }
  99
 100 static bool initialized = false;
 101
 102 void be_info_init(void)
 103 {
 104         if (initialized)
 105                 panic("double initialization of be_info");
 106
 107         old_phi_copy_attr = op_Phi->ops.copy_attr;
 108         op_Phi->ops.copy_attr = new_Phi_copy_attr;
 109         initialized = true;
 110
 111         /* phis have register and register requirements now which we want to dump */
 112         assert(op_Phi->ops.dump_node == NULL);
 113         op_Phi->ops.dump_node = be_dump_phi_reg_reqs;
 114 }
 115
 116 void be_info_init_irg(ir_graph *irg)
 117 {
 118         irg_walk_anchors(irg, init_walker, NULL, NULL);
 119 }
 120
 121 void be_info_free(void)
 122 {
 123         if (!initialized)
 124                 panic("be_info_free called without prior init");
 125
 126         assert(op_Phi->ops.copy_attr == new_Phi_copy_attr);
 127         op_Phi->ops.copy_attr = old_phi_copy_attr;
 128         initialized = false;
 129
 130         assert(op_Phi->ops.dump_node == be_dump_phi_reg_reqs);
 131         op_Phi->ops.dump_node = NULL;
 132 }
 133
 134 int be_info_initialized(const ir_graph *irg)
 135 {
 136         (void) irg;
 137         return initialized;
 138 }