gcc/tree-ssa-operands.h

   1 /* SSA operand management for trees.
   2    Copyright (C) 2003 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 it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 2, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING.  If not, write to the Free
  18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19 02111-1307, USA.  */
  20
  21 #ifndef GCC_TREE_SSA_OPERANDS_H
  22 #define GCC_TREE_SSA_OPERANDS_H
  23
  24 /* Interface to SSA operands.  */
  25
  26
  27 /* This represents a pointer to a DEF operand.  */
  28 typedef struct def_operand_ptr GTY(())
  29 {
  30   tree * GTY((skip(""))) def;
  31 } def_operand_p;
  32
  33 /* This represents a pointer to a USE operand.  */
  34 typedef struct use_operand_ptr GTY(())
  35 {
  36   tree * GTY((skip(""))) use;
  37 } use_operand_p;
  38
  39 extern def_operand_p NULL_DEF_OPERAND_P;
  40 extern use_operand_p NULL_USE_OPERAND_P;
  41
  42 /* This represents the DEF operands of a stmt.  */
  43 typedef struct def_optype_d GTY(())
  44 {
  45   unsigned num_defs;
  46   struct def_operand_ptr GTY((length("%h.num_defs"))) defs[1];
  47 } def_optype_t;
  48
  49 typedef def_optype_t *def_optype;
  50
  51 /* This represents the USE operands of a stmt.  */
  52 typedef struct use_optype_d GTY(())
  53 {
  54   unsigned num_uses;
  55   struct use_operand_ptr GTY((length("%h.num_uses"))) uses[1];
  56 } use_optype_t;
  57
  58 typedef use_optype_t *use_optype;
  59
  60 /* Operand type which stores a def and a use tree.  */
  61 typedef struct v_def_use_operand_type GTY(())
  62 {
  63   tree def;
  64   tree use;
  65 } v_def_use_operand_type_t;
  66
  67 /* This represents the MAY_DEFS for a stmt.  */
  68 typedef struct v_may_def_optype_d GTY(())
  69 {
  70   unsigned num_v_may_defs;
  71   struct v_def_use_operand_type GTY((length ("%h.num_v_may_defs")))
  72                                                               v_may_defs[1];
  73 } v_may_def_optype_t;
  74
  75 typedef v_may_def_optype_t *v_may_def_optype;
  76
  77 /* This represents the VUSEs for a stmt.  */
  78 typedef struct vuse_optype_d GTY(())
  79 {
  80   unsigned num_vuses;
  81   tree GTY((length ("%h.num_vuses"))) vuses[1];
  82 } vuse_optype_t;
  83
  84 typedef vuse_optype_t *vuse_optype;
  85
  86 /* This represents the V_MUST_DEFS for a stmt.  */
  87 typedef struct v_must_def_optype_d GTY(())
  88 {
  89   unsigned num_v_must_defs;
  90   v_def_use_operand_type_t GTY((length("%h.num_v_must_defs"))) v_must_defs[1];
  91 } v_must_def_optype_t;
  92
  93 typedef v_must_def_optype_t *v_must_def_optype;
  94
  95 /* This represents the operand cache fora stmt.  */
  96 typedef struct stmt_operands_d GTY(())
  97 {
  98   /* Statement operands.  */
  99   struct def_optype_d * GTY (()) def_ops;
 100   struct use_optype_d * GTY (()) use_ops;
 101
 102   /* Virtual operands (V_MAY_DEF, VUSE, and V_MUST_DEF).  */
 103   struct v_may_def_optype_d * GTY (()) v_may_def_ops;
 104   struct vuse_optype_d * GTY (()) vuse_ops;
 105   struct v_must_def_optype_d * GTY (()) v_must_def_ops;
 106 } stmt_operands_t;
 107
 108 typedef stmt_operands_t *stmt_operands_p;
 109
 110 #define USE_FROM_PTR(OP)        get_use_from_ptr (OP)
 111 #define DEF_FROM_PTR(OP)        get_def_from_ptr (OP)
 112 #define SET_USE(OP, V)          ((*((OP).use)) = (V))
 113 #define SET_DEF(OP, V)          ((*((OP).def)) = (V))
 114
 115
 116 #define USE_OPS(ANN)            get_use_ops (ANN)
 117 #define STMT_USE_OPS(STMT)      get_use_ops (stmt_ann (STMT))
 118 #define NUM_USES(OPS)           ((OPS) ? (OPS)->num_uses : 0)
 119 #define USE_OP_PTR(OPS, I)      get_use_op_ptr ((OPS), (I))
 120 #define USE_OP(OPS, I)          (USE_FROM_PTR (USE_OP_PTR ((OPS), (I))))
 121 #define SET_USE_OP(OPS, I, V)   (SET_USE (USE_OP_PTR ((OPS), (I)), (V)))
 122
 123
 124
 125 #define DEF_OPS(ANN)            get_def_ops (ANN)
 126 #define STMT_DEF_OPS(STMT)      get_def_ops (stmt_ann (STMT))
 127 #define NUM_DEFS(OPS)           ((OPS) ? (OPS)->num_defs : 0)
 128 #define DEF_OP_PTR(OPS, I)      get_def_op_ptr ((OPS), (I))
 129 #define DEF_OP(OPS, I)          (DEF_FROM_PTR (DEF_OP_PTR ((OPS), (I))))
 130 #define SET_DEF_OP(OPS, I, V)   (SET_DEF (DEF_OP_PTR ((OPS), (I)), (V)))
 131
 132
 133
 134 #define V_MAY_DEF_OPS(ANN)              get_v_may_def_ops (ANN)
 135 #define STMT_V_MAY_DEF_OPS(STMT)        get_v_may_def_ops (stmt_ann(STMT))
 136 #define NUM_V_MAY_DEFS(OPS)             ((OPS) ? (OPS)->num_v_may_defs : 0)
 137 #define V_MAY_DEF_RESULT_PTR(OPS, I)    get_v_may_def_result_ptr ((OPS), (I))
 138 #define V_MAY_DEF_RESULT(OPS, I)                                        \
 139                             (DEF_FROM_PTR (V_MAY_DEF_RESULT_PTR ((OPS), (I))))
 140 #define SET_V_MAY_DEF_RESULT(OPS, I, V)                                 \
 141                             (SET_DEF (V_MAY_DEF_RESULT_PTR ((OPS), (I)), (V)))
 142 #define V_MAY_DEF_OP_PTR(OPS, I)        get_v_may_def_op_ptr ((OPS), (I))
 143 #define V_MAY_DEF_OP(OPS, I)                                            \
 144                             (USE_FROM_PTR (V_MAY_DEF_OP_PTR ((OPS), (I))))
 145 #define SET_V_MAY_DEF_OP(OPS, I, V)                                     \
 146                             (SET_USE (V_MAY_DEF_OP_PTR ((OPS), (I)), (V)))
 147
 148
 149 #define VUSE_OPS(ANN)           get_vuse_ops (ANN)
 150 #define STMT_VUSE_OPS(STMT)     get_vuse_ops (stmt_ann(STMT))
 151 #define NUM_VUSES(OPS)          ((OPS) ? (OPS)->num_vuses : 0)
 152 #define VUSE_OP_PTR(OPS, I)     get_vuse_op_ptr ((OPS), (I))
 153 #define VUSE_OP(OPS, I)         (USE_FROM_PTR (VUSE_OP_PTR ((OPS), (I))))
 154 #define SET_VUSE_OP(OPS, I, V)  (SET_USE (VUSE_OP_PTR ((OPS), (I)), (V)))
 155
 156
 157 #define V_MUST_DEF_OPS(ANN)             get_v_must_def_ops (ANN)
 158 #define STMT_V_MUST_DEF_OPS(STMT)       get_v_must_def_ops (stmt_ann (STMT))
 159 #define NUM_V_MUST_DEFS(OPS)            ((OPS) ? (OPS)->num_v_must_defs : 0)
 160 #define V_MUST_DEF_RESULT_PTR(OPS, I)   get_v_must_def_result_ptr ((OPS), (I))
 161 #define V_MUST_DEF_RESULT(OPS, I) \
 162                                 (DEF_FROM_PTR (V_MUST_DEF_RESULT_PTR ((OPS), (I))))
 163 #define SET_V_MUST_DEF_RESULT(OPS, I, V) \
 164                                 (SET_DEF (V_MUST_DEF_RESULT_PTR ((OPS), (I)), (V)))
 165 #define V_MUST_DEF_KILL_PTR(OPS, I)  get_v_must_def_kill_ptr ((OPS), (I))
 166 #define V_MUST_DEF_KILL(OPS, I) (USE_FROM_PTR (V_MUST_DEF_KILL_PTR ((OPS), (I))))
 167 #define SET_V_MUST_DEF_KILL(OPS, I, V) (SET_USE (V_MUST_DEF_KILL_PTR ((OPS), (I)), (V)))
 168
 169 #define PHI_RESULT_PTR(PHI)     get_phi_result_ptr (PHI)
 170 #define PHI_RESULT(PHI)         DEF_FROM_PTR (PHI_RESULT_PTR (PHI))
 171 #define SET_PHI_RESULT(PHI, V)  SET_DEF (PHI_RESULT_PTR (PHI), (V))
 172
 173 #define PHI_ARG_DEF_PTR(PHI, I) get_phi_arg_def_ptr ((PHI), (I))
 174 #define PHI_ARG_DEF(PHI, I)     USE_FROM_PTR (PHI_ARG_DEF_PTR ((PHI), (I)))
 175 #define SET_PHI_ARG_DEF(PHI, I, V)                                      \
 176                                 SET_USE (PHI_ARG_DEF_PTR ((PHI), (I)), (V))
 177 #define PHI_ARG_DEF_FROM_EDGE(PHI, E)                                   \
 178                                 PHI_ARG_DEF ((PHI),                     \
 179                                              phi_arg_from_edge ((PHI),(E)))
 180 #define PHI_ARG_DEF_PTR_FROM_EDGE(PHI, E)                               \
 181                                 PHI_ARG_DEF_PTR ((PHI),                 \
 182                                              phi_arg_from_edge ((PHI),(E)))
 183
 184
 185 extern void init_ssa_operands (void);
 186 extern void fini_ssa_operands (void);
 187 extern void get_stmt_operands (tree);
 188 extern void copy_virtual_operands (tree, tree);
 189 extern void create_ssa_artficial_load_stmt (stmt_operands_p, tree);
 190
 191
 192 /* This structure is used in the operand iterator loops.  It contains the
 193    items required to determine which operand is retrieved next.  During
 194    optimization, this structure is scalarized, and any unused fields are
 195    optimized away, resulting in little overhead.  */
 196
 197 typedef struct ssa_operand_iterator_d
 198 {
 199   int num_use;
 200   int num_def;
 201   int num_vuse;
 202   int num_v_mayu;
 203   int num_v_mayd;
 204   int num_v_mustu;
 205   int num_v_mustd;
 206   int use_i;
 207   int def_i;
 208   int vuse_i;
 209   int v_mayu_i;
 210   int v_mayd_i;
 211   int v_mustu_i;
 212   int v_mustd_i;
 213   stmt_operands_p ops;
 214   bool done;
 215 } ssa_op_iter;
 216
 217 /* These flags are used to determine which operands are returned during
 218    execution of the loop.  */
 219 #define SSA_OP_USE              0x01    /* Real USE operands.  */
 220 #define SSA_OP_DEF              0x02    /* Real DEF operands.  */
 221 #define SSA_OP_VUSE             0x04    /* VUSE operands.  */
 222 #define SSA_OP_VMAYUSE          0x08    /* USE portion of V_MAY_DEFS.  */
 223 #define SSA_OP_VMAYDEF          0x10    /* DEF portion of V_MAY_DEFS.  */
 224 #define SSA_OP_VMUSTDEF         0x20    /* V_MUST_DEF definitions.  */
 225 #define SSA_OP_VMUSTDEFKILL     0x40    /* V_MUST_DEF kills.  */
 226
 227 /* These are commonly grouped operand flags.  */
 228 #define SSA_OP_VIRTUAL_USES     (SSA_OP_VUSE | SSA_OP_VMAYUSE)
 229 #define SSA_OP_VIRTUAL_DEFS     (SSA_OP_VMAYDEF | SSA_OP_VMUSTDEF)
 230 #define SSA_OP_VIRTUAL_KILLS    (SSA_OP_VMUSTDEFKILL)
 231 #define SSA_OP_ALL_VIRTUALS     (SSA_OP_VIRTUAL_USES | SSA_OP_VIRTUAL_KILLS | SSA_OP_VIRTUAL_DEFS)
 232 #define SSA_OP_ALL_USES         (SSA_OP_VIRTUAL_USES | SSA_OP_USE)
 233 #define SSA_OP_ALL_DEFS         (SSA_OP_VIRTUAL_DEFS | SSA_OP_DEF)
 234 #define SSA_OP_ALL_KILLS        (SSA_OP_VIRTUAL_KILLS)
 235 #define SSA_OP_ALL_OPERANDS     (SSA_OP_ALL_USES | SSA_OP_ALL_DEFS | SSA_OP_ALL_KILLS)
 236
 237 /* This macro executes a loop over the operands of STMT specified in FLAG,
 238    returning each operand as a 'tree' in the variable TREEVAR.  ITER is an
 239    ssa_op_iter structure used to control the loop.  */
 240 #define FOR_EACH_SSA_TREE_OPERAND(TREEVAR, STMT, ITER, FLAGS)   \
 241   for (TREEVAR = op_iter_init_tree (&(ITER), STMT, FLAGS);      \
 242        !op_iter_done (&(ITER));                                 \
 243        TREEVAR = op_iter_next_tree (&(ITER)))
 244
 245 /* This macro executes a loop over the operands of STMT specified in FLAG,
 246    returning each operand as a 'use_operand_p' in the variable USEVAR.
 247    ITER is an ssa_op_iter structure used to control the loop.  */
 248 #define FOR_EACH_SSA_USE_OPERAND(USEVAR, STMT, ITER, FLAGS)     \
 249   for (USEVAR = op_iter_init_use (&(ITER), STMT, FLAGS);        \
 250        !op_iter_done (&(ITER));                                 \
 251        USEVAR = op_iter_next_use (&(ITER)))
 252
 253 /* This macro executes a loop over the operands of STMT specified in FLAG,
 254    returning each operand as a 'def_operand_p' in the variable DEFVAR.
 255    ITER is an ssa_op_iter structure used to control the loop.  */
 256 #define FOR_EACH_SSA_DEF_OPERAND(DEFVAR, STMT, ITER, FLAGS)     \
 257   for (DEFVAR = op_iter_init_def (&(ITER), STMT, FLAGS);        \
 258        !op_iter_done (&(ITER));                                 \
 259        DEFVAR = op_iter_next_def (&(ITER)))
 260
 261 /* This macro executes a loop over the V_MAY_DEF operands of STMT.  The def
 262    and use for each V_MAY_DEF is returned in DEFVAR and USEVAR.
 263    ITER is an ssa_op_iter structure used to control the loop.  */
 264 #define FOR_EACH_SSA_MAYDEF_OPERAND(DEFVAR, USEVAR, STMT, ITER) \
 265   for (op_iter_init_maydef (&(ITER), STMT, &(USEVAR), &(DEFVAR));       \
 266        !op_iter_done (&(ITER));                                 \
 267        op_iter_next_maydef (&(USEVAR), &(DEFVAR), &(ITER)))
 268
 269 /* This macro executes a loop over the V_MUST_DEF operands of STMT.  The def
 270    and kill for each V_MUST_DEF is returned in DEFVAR and KILLVAR.
 271    ITER is an ssa_op_iter structure used to control the loop.  */
 272 #define FOR_EACH_SSA_MUSTDEF_OPERAND(DEFVAR, KILLVAR, STMT, ITER)       \
 273   for (op_iter_init_mustdef (&(ITER), STMT, &(KILLVAR), &(DEFVAR));     \
 274        !op_iter_done (&(ITER));                                 \
 275        op_iter_next_mustdef (&(KILLVAR), &(DEFVAR), &(ITER)))
 276
 277 #endif  /* GCC_TREE_SSA_OPERANDS_H  */