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

   1 /*
   2  * Copyright (C) 1995-2011 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  */
  24 #include "config.h"
  25
  26 #include <stdbool.h>
  27
  28 #include "beinfo.h"
  29 #include "beirg.h"
  30 #include "bearch.h"
  31 #include "benode.h"
  32 #include "besched.h"
  33 #include "bedump.h"
  34 #include "belive_t.h"
  35 #include "irgwalk.h"
  36 #include "irnode_t.h"
  37 #include "irdump_t.h"
  38 #include "irhooks.h"
  39 #include "error.h"
  40
  41 static copy_attr_func old_phi_copy_attr;
  42
  43 void be_info_new_node(ir_graph *irg, ir_node *node)
  44 {
  45         struct obstack *obst;
  46         backend_info_t *info;
  47
  48         /* Projs need no be info, all info is fetched from their predecessor */
  49         if (is_Proj(node))
  50                 return;
  51
  52         obst = be_get_be_obst(irg);
  53         info = OALLOCZ(obst, backend_info_t);
  54
  55         assert(node->backend_info == NULL);
  56         node->backend_info = info;
  57
  58         /*
  59          * Set backend info for some middleend nodes which still appear in
  60          * backend graphs
  61          */
  62         switch (get_irn_opcode(node)) {
  63         case iro_Block:
  64         case iro_Dummy:
  65         case iro_NoMem:
  66         case iro_Anchor:
  67         case iro_Pin:
  68         case iro_Sync:
  69         case iro_Bad:
  70         case iro_End:
  71         case iro_Unknown:
  72                 info->flags |= arch_irn_flags_not_scheduled;
  73                 /* FALLTHROUGH */
  74         case iro_Phi:
  75                 info->out_infos = NEW_ARR_D(reg_out_info_t, obst, 1);
  76                 memset(info->out_infos, 0, 1 * sizeof(info->out_infos[0]));
  77                 info->out_infos[0].req = arch_no_register_req;
  78                 break;
  79         default:
  80                 break;
  81         }
  82 }
  83
  84 static void new_phi_copy_attr(ir_graph *irg, const ir_node *old_node,
  85                               ir_node *new_node)
  86 {
  87         backend_info_t *old_info = be_get_info(old_node);
  88         backend_info_t *new_info = be_get_info(new_node);
  89
  90         *new_info = *old_info;
  91
  92         old_phi_copy_attr(irg, old_node, new_node);
  93 }
  94
  95 int be_nodes_equal(const ir_node *node1, const ir_node *node2)
  96 {
  97         const backend_info_t *info1 = be_get_info(node1);
  98         const backend_info_t *info2 = be_get_info(node2);
  99         size_t                len   = ARR_LEN(info1->out_infos);
 100         int                   arity = get_irn_arity(node1);
 101         int                   in;
 102         size_t                i;
 103
 104         if (ARR_LEN(info2->out_infos) != len)
 105                 return false;
 106
 107         assert(arity == get_irn_arity(node2));
 108
 109         for (in = 0; in < arity; ++in) {
 110                 if (info1->in_reqs[in] != info2->in_reqs[in])
 111                         return false;
 112         }
 113
 114         for (i = 0; i < len; ++i) {
 115                 const reg_out_info_t *out1 = &info1->out_infos[i];
 116                 const reg_out_info_t *out2 = &info2->out_infos[i];
 117                 if (out1->reg != out2->reg)
 118                         return false;
 119                 if (!reg_reqs_equal(out1->req, out2->req))
 120                         return false;
 121         }
 122
 123         return true;
 124 }
 125
 126 static void init_walker(ir_node *node, void *data)
 127 {
 128         ir_graph *irg = get_irn_irg(node);
 129         (void) data;
 130         be_info_new_node(irg, node);
 131 }
 132
 133 static bool         initialized = false;
 134 static hook_entry_t hook_liveness_info;
 135
 136 static void dump_liveness_info_hook(void *context, FILE *F, const ir_node *node)
 137 {
 138         (void)context;
 139         if (!is_Block(node))
 140                 return;
 141         ir_graph *irg = get_irn_irg(node);
 142         if (!irg_is_constrained(irg, IR_GRAPH_CONSTRAINT_BACKEND))
 143                 return;
 144
 145         be_lv_t *lv = be_get_irg_liveness(irg);
 146         if (lv == NULL)
 147                 return;
 148         if (!lv->sets_valid)
 149                 return;
 150
 151         be_dump_liveness_block(lv, F, node);
 152 }
 153
 154 void be_info_init(void)
 155 {
 156         if (initialized)
 157                 panic("double initialization of be_info");
 158
 159         old_phi_copy_attr = op_Phi->ops.copy_attr;
 160         op_Phi->ops.copy_attr = new_phi_copy_attr;
 161         initialized = true;
 162
 163         /* phis have register and register requirements now which we want to dump */
 164         assert(op_Phi->ops.dump_node == NULL);
 165         op_Phi->ops.dump_node = be_dump_phi_reg_reqs;
 166
 167         hook_liveness_info.hook._hook_node_info = dump_liveness_info_hook;
 168         register_hook(hook_node_info, &hook_liveness_info);
 169 }
 170
 171 /**
 172  * Edge hook to dump the schedule edges.
 173  */
 174 static void sched_edge_hook(FILE *F, const ir_node *irn)
 175 {
 176         ir_graph *irg = get_irn_irg(irn);
 177         if (!irg_is_constrained(irg, IR_GRAPH_CONSTRAINT_BACKEND))
 178                 return;
 179
 180         if (is_Proj(irn) || is_Block(irn) || !sched_is_scheduled(irn))
 181                 return;
 182
 183         ir_node *const prev = sched_prev(irn);
 184         if (!sched_is_begin(prev)) {
 185                 fprintf(F, "edge:{sourcename: ");
 186                 print_nodeid(F, irn);
 187                 fprintf(F, " targetname: ");
 188                 print_nodeid(F, prev);
 189                 fprintf(F, " color:magenta}\n");
 190         }
 191 }
 192
 193 void be_info_init_irg(ir_graph *irg)
 194 {
 195         add_irg_constraints(irg, IR_GRAPH_CONSTRAINT_BACKEND);
 196         irg_walk_anchors(irg, init_walker, NULL, NULL);
 197
 198         set_dump_node_edge_hook(sched_edge_hook);
 199 }
 200
 201 void be_info_free(void)
 202 {
 203         if (!initialized)
 204                 panic("called without prior init");
 205
 206         assert(op_Phi->ops.copy_attr == new_phi_copy_attr);
 207         op_Phi->ops.copy_attr = old_phi_copy_attr;
 208         initialized = false;
 209
 210         assert(op_Phi->ops.dump_node == be_dump_phi_reg_reqs);
 211         op_Phi->ops.dump_node = NULL;
 212
 213         unregister_hook(hook_node_info, &hook_liveness_info);
 214 }