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_DZ(reg_out_info_t, obst, 1);
  76                 info->out_infos[0].req = arch_no_register_req;
  77                 break;
  78         default:
  79                 break;
  80         }
  81 }
  82
  83 static void new_phi_copy_attr(ir_graph *irg, const ir_node *old_node,
  84                               ir_node *new_node)
  85 {
  86         backend_info_t *old_info = be_get_info(old_node);
  87         backend_info_t *new_info = be_get_info(new_node);
  88
  89         *new_info = *old_info;
  90
  91         old_phi_copy_attr(irg, old_node, new_node);
  92 }
  93
  94 int be_nodes_equal(const ir_node *node1, const ir_node *node2)
  95 {
  96         const backend_info_t *info1 = be_get_info(node1);
  97         const backend_info_t *info2 = be_get_info(node2);
  98         size_t                len   = ARR_LEN(info1->out_infos);
  99         int                   arity = get_irn_arity(node1);
 100         int                   in;
 101         size_t                i;
 102
 103         if (ARR_LEN(info2->out_infos) != len)
 104                 return false;
 105
 106         assert(arity == get_irn_arity(node2));
 107
 108         for (in = 0; in < arity; ++in) {
 109                 if (info1->in_reqs[in] != info2->in_reqs[in])
 110                         return false;
 111         }
 112
 113         for (i = 0; i < len; ++i) {
 114                 const reg_out_info_t *out1 = &info1->out_infos[i];
 115                 const reg_out_info_t *out2 = &info2->out_infos[i];
 116                 if (out1->reg != out2->reg)
 117                         return false;
 118                 if (!reg_reqs_equal(out1->req, out2->req))
 119                         return false;
 120         }
 121
 122         return true;
 123 }
 124
 125 static void init_walker(ir_node *node, void *data)
 126 {
 127         ir_graph *irg = get_irn_irg(node);
 128         (void) data;
 129         be_info_new_node(irg, node);
 130 }
 131
 132 static bool         initialized = false;
 133 static hook_entry_t hook_liveness_info;
 134
 135 static void dump_liveness_info_hook(void *context, FILE *F, const ir_node *node)
 136 {
 137         (void)context;
 138         if (!is_Block(node))
 139                 return;
 140         ir_graph *irg = get_irn_irg(node);
 141         if (!irg_is_constrained(irg, IR_GRAPH_CONSTRAINT_BACKEND))
 142                 return;
 143
 144         be_lv_t *lv = be_get_irg_liveness(irg);
 145         if (lv == NULL)
 146                 return;
 147         if (!lv->sets_valid)
 148                 return;
 149
 150         be_dump_liveness_block(lv, F, node);
 151 }
 152
 153 void be_info_init(void)
 154 {
 155         if (initialized)
 156                 panic("double initialization of be_info");
 157
 158         old_phi_copy_attr = op_Phi->ops.copy_attr;
 159         op_Phi->ops.copy_attr = new_phi_copy_attr;
 160         initialized = true;
 161
 162         /* phis have register and register requirements now which we want to dump */
 163         assert(op_Phi->ops.dump_node == NULL);
 164         op_Phi->ops.dump_node = be_dump_phi_reg_reqs;
 165
 166         hook_liveness_info.hook._hook_node_info = dump_liveness_info_hook;
 167         register_hook(hook_node_info, &hook_liveness_info);
 168 }
 169
 170 /**
 171  * Edge hook to dump the schedule edges.
 172  */
 173 static void sched_edge_hook(FILE *F, const ir_node *irn)
 174 {
 175         ir_graph *irg = get_irn_irg(irn);
 176         if (!irg_is_constrained(irg, IR_GRAPH_CONSTRAINT_BACKEND))
 177                 return;
 178
 179         if (is_Proj(irn) || is_Block(irn) || !sched_is_scheduled(irn))
 180                 return;
 181
 182         ir_node *const prev = sched_prev(irn);
 183         if (!sched_is_begin(prev)) {
 184                 fprintf(F, "edge:{sourcename: ");
 185                 print_nodeid(F, irn);
 186                 fprintf(F, " targetname: ");
 187                 print_nodeid(F, prev);
 188                 fprintf(F, " color:magenta}\n");
 189         }
 190 }
 191
 192 void be_info_init_irg(ir_graph *irg)
 193 {
 194         add_irg_constraints(irg, IR_GRAPH_CONSTRAINT_BACKEND);
 195         irg_walk_anchors(irg, init_walker, NULL, NULL);
 196
 197         set_dump_node_edge_hook(sched_edge_hook);
 198 }
 199
 200 void be_info_free(void)
 201 {
 202         if (!initialized)
 203                 panic("called without prior init");
 204
 205         assert(op_Phi->ops.copy_attr == new_phi_copy_attr);
 206         op_Phi->ops.copy_attr = old_phi_copy_attr;
 207         initialized = false;
 208
 209         assert(op_Phi->ops.dump_node == be_dump_phi_reg_reqs);
 210         op_Phi->ops.dump_node = NULL;
 211
 212         unregister_hook(hook_node_info, &hook_liveness_info);
 213 }