gcc/tree-ssa-operands.h

   1 /* SSA operand management for trees.
   2    Copyright (C) 2003, 2005 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, 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301, 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 tree *def_operand_p;
  29
  30 /* This represents a pointer to a USE operand.  */
  31 typedef ssa_use_operand_t *use_operand_p;
  32
  33 /* NULL operand types.  */
  34 #define NULL_USE_OPERAND_P              NULL
  35 #define NULL_DEF_OPERAND_P              NULL
  36
  37 /* This represents the DEF operands of a stmt.  */
  38 struct def_optype_d
  39 {
  40   struct def_optype_d *next;
  41   tree *def_ptr;
  42 };
  43 typedef struct def_optype_d *def_optype_p;
  44
  45 /* This represents the USE operands of a stmt.  */
  46 struct use_optype_d
  47 {
  48   struct use_optype_d *next;
  49   struct ssa_use_operand_d use_ptr;
  50 };
  51 typedef struct use_optype_d *use_optype_p;
  52
  53 /* This represents the MAY_DEFS for a stmt.  */
  54 struct maydef_optype_d
  55 {
  56   struct maydef_optype_d *next;
  57   tree def_var;
  58   tree use_var;
  59   struct ssa_use_operand_d use_ptr;
  60 };
  61 typedef struct maydef_optype_d *maydef_optype_p;
  62
  63 /* This represents the VUSEs for a stmt.  */
  64 struct vuse_optype_d
  65 {
  66   struct vuse_optype_d *next;
  67   tree use_var;
  68   struct ssa_use_operand_d use_ptr;
  69 };
  70 typedef struct vuse_optype_d *vuse_optype_p;
  71
  72 /* This represents the V_MUST_DEFS for a stmt.  */
  73 struct mustdef_optype_d
  74 {
  75   struct mustdef_optype_d *next;
  76   tree def_var;
  77   tree kill_var;
  78   struct ssa_use_operand_d use_ptr;
  79 };
  80 typedef struct mustdef_optype_d *mustdef_optype_p;
  81
  82
  83 #define SSA_OPERAND_MEMORY_SIZE         (2048 - sizeof (void *))
  84
  85 struct ssa_operand_memory_d GTY((chain_next("%h.next")))
  86 {
  87   struct ssa_operand_memory_d *next;
  88   char mem[SSA_OPERAND_MEMORY_SIZE];
  89 };
  90
  91
  92 /* This represents the operand cache for a stmt.  */
  93 struct stmt_operands_d
  94 {
  95   /* Statement operands.  */
  96   struct def_optype_d * def_ops;
  97   struct use_optype_d * use_ops;
  98
  99   /* Virtual operands (V_MAY_DEF, VUSE, and V_MUST_DEF).  */
 100   struct maydef_optype_d * maydef_ops;
 101   struct vuse_optype_d * vuse_ops;
 102   struct mustdef_optype_d * mustdef_ops;
 103 };
 104
 105 typedef struct stmt_operands_d *stmt_operands_p;
 106
 107 #define USE_FROM_PTR(PTR)       get_use_from_ptr (PTR)
 108 #define DEF_FROM_PTR(PTR)       get_def_from_ptr (PTR)
 109 #define SET_USE(USE, V)         set_ssa_use_from_ptr (USE, V)
 110 #define SET_DEF(DEF, V)         ((*(DEF)) = (V))
 111
 112 #define USE_STMT(USE)           (USE)->stmt
 113
 114 #define DEF_OPS(STMT)           (stmt_ann (STMT)->operands.def_ops)
 115 #define USE_OPS(STMT)           (stmt_ann (STMT)->operands.use_ops)
 116 #define VUSE_OPS(STMT)          (stmt_ann (STMT)->operands.vuse_ops)
 117 #define MAYDEF_OPS(STMT)        (stmt_ann (STMT)->operands.maydef_ops)
 118 #define MUSTDEF_OPS(STMT)       (stmt_ann (STMT)->operands.mustdef_ops)
 119
 120 #define USE_OP_PTR(OP)          (&((OP)->use_ptr))
 121 #define USE_OP(OP)              (USE_FROM_PTR (USE_OP_PTR (OP)))
 122
 123 #define DEF_OP_PTR(OP)          ((OP)->def_ptr)
 124 #define DEF_OP(OP)              (DEF_FROM_PTR (DEF_OP_PTR (OP)))
 125
 126 #define VUSE_OP_PTR(OP)         USE_OP_PTR(OP)
 127 #define VUSE_OP(OP)             ((OP)->use_var)
 128
 129 #define MAYDEF_RESULT_PTR(OP)   (&((OP)->def_var))
 130 #define MAYDEF_RESULT(OP)       ((OP)->def_var)
 131 #define MAYDEF_OP_PTR(OP)       USE_OP_PTR (OP)
 132 #define MAYDEF_OP(OP)           ((OP)->use_var)
 133
 134 #define MUSTDEF_RESULT_PTR(OP)  (&((OP)->def_var))
 135 #define MUSTDEF_RESULT(OP)      ((OP)->def_var)
 136 #define MUSTDEF_KILL_PTR(OP)    USE_OP_PTR (OP)
 137 #define MUSTDEF_KILL(OP)        ((OP)->kill_var)
 138
 139 #define PHI_RESULT_PTR(PHI)     get_phi_result_ptr (PHI)
 140 #define PHI_RESULT(PHI)         DEF_FROM_PTR (PHI_RESULT_PTR (PHI))
 141 #define SET_PHI_RESULT(PHI, V)  SET_DEF (PHI_RESULT_PTR (PHI), (V))
 142
 143 #define PHI_ARG_DEF_PTR(PHI, I) get_phi_arg_def_ptr ((PHI), (I))
 144 #define PHI_ARG_DEF(PHI, I)     USE_FROM_PTR (PHI_ARG_DEF_PTR ((PHI), (I)))
 145 #define SET_PHI_ARG_DEF(PHI, I, V)                                      \
 146                                 SET_USE (PHI_ARG_DEF_PTR ((PHI), (I)), (V))
 147 #define PHI_ARG_DEF_FROM_EDGE(PHI, E)                                   \
 148                                 PHI_ARG_DEF ((PHI), (E)->dest_idx)
 149 #define PHI_ARG_DEF_PTR_FROM_EDGE(PHI, E)                               \
 150                                 PHI_ARG_DEF_PTR ((PHI), (E)->dest_idx)
 151 #define PHI_ARG_INDEX_FROM_USE(USE)   phi_arg_index_from_use (USE)
 152
 153
 154 extern void init_ssa_operands (void);
 155 extern void fini_ssa_operands (void);
 156 extern void free_ssa_operands (stmt_operands_p);
 157 extern void update_stmt_operands (tree);
 158 extern bool verify_imm_links (FILE *f, tree var);
 159
 160 extern void copy_virtual_operands (tree, tree);
 161 extern void create_ssa_artficial_load_stmt (tree, tree);
 162
 163 extern void dump_immediate_uses (FILE *file);
 164 extern void dump_immediate_uses_for (FILE *file, tree var);
 165 extern void debug_immediate_uses (void);
 166 extern void debug_immediate_uses_for (tree var);
 167
 168 extern bool ssa_call_clobbered_cache_valid;
 169 extern bool ssa_ro_call_cache_valid;
 170
 171 extern bool ssa_operands_active (void);
 172
 173 extern void add_to_addressable_set (tree, bitmap *);
 174
 175 enum ssa_op_iter_type {
 176   ssa_op_iter_none = 0,
 177   ssa_op_iter_tree,
 178   ssa_op_iter_use,
 179   ssa_op_iter_def,
 180   ssa_op_iter_maymustdef
 181 };
 182 /* This structure is used in the operand iterator loops.  It contains the
 183    items required to determine which operand is retrieved next.  During
 184    optimization, this structure is scalarized, and any unused fields are
 185    optimized away, resulting in little overhead.  */
 186
 187 typedef struct ssa_operand_iterator_d
 188 {
 189   def_optype_p defs;
 190   use_optype_p uses;
 191   vuse_optype_p vuses;
 192   maydef_optype_p maydefs;
 193   maydef_optype_p mayuses;
 194   mustdef_optype_p mustdefs;
 195   mustdef_optype_p mustkills;
 196   enum ssa_op_iter_type iter_type;
 197   int phi_i;
 198   int num_phi;
 199   tree phi_stmt;
 200   bool done;
 201 } ssa_op_iter;
 202
 203 /* These flags are used to determine which operands are returned during
 204    execution of the loop.  */
 205 #define SSA_OP_USE              0x01    /* Real USE operands.  */
 206 #define SSA_OP_DEF              0x02    /* Real DEF operands.  */
 207 #define SSA_OP_VUSE             0x04    /* VUSE operands.  */
 208 #define SSA_OP_VMAYUSE          0x08    /* USE portion of V_MAY_DEFS.  */
 209 #define SSA_OP_VMAYDEF          0x10    /* DEF portion of V_MAY_DEFS.  */
 210 #define SSA_OP_VMUSTDEF         0x20    /* V_MUST_DEF definitions.  */
 211 #define SSA_OP_VMUSTKILL        0x40    /* V_MUST_DEF kills.  */
 212
 213 /* These are commonly grouped operand flags.  */
 214 #define SSA_OP_VIRTUAL_USES     (SSA_OP_VUSE | SSA_OP_VMAYUSE)
 215 #define SSA_OP_VIRTUAL_DEFS     (SSA_OP_VMAYDEF | SSA_OP_VMUSTDEF)
 216 #define SSA_OP_VIRTUAL_KILLS    (SSA_OP_VMUSTKILL)
 217 #define SSA_OP_ALL_VIRTUALS     (SSA_OP_VIRTUAL_USES | SSA_OP_VIRTUAL_KILLS \
 218                                  | SSA_OP_VIRTUAL_DEFS)
 219 #define SSA_OP_ALL_USES         (SSA_OP_VIRTUAL_USES | SSA_OP_USE)
 220 #define SSA_OP_ALL_DEFS         (SSA_OP_VIRTUAL_DEFS | SSA_OP_DEF)
 221 #define SSA_OP_ALL_KILLS        (SSA_OP_VIRTUAL_KILLS)
 222 #define SSA_OP_ALL_OPERANDS     (SSA_OP_ALL_USES | SSA_OP_ALL_DEFS      \
 223                                  | SSA_OP_ALL_KILLS)
 224
 225 /* This macro executes a loop over the operands of STMT specified in FLAG,
 226    returning each operand as a 'tree' in the variable TREEVAR.  ITER is an
 227    ssa_op_iter structure used to control the loop.  */
 228 #define FOR_EACH_SSA_TREE_OPERAND(TREEVAR, STMT, ITER, FLAGS)   \
 229   for (TREEVAR = op_iter_init_tree (&(ITER), STMT, FLAGS);      \
 230        !op_iter_done (&(ITER));                                 \
 231        TREEVAR = op_iter_next_tree (&(ITER)))
 232
 233 /* This macro executes a loop over the operands of STMT specified in FLAG,
 234    returning each operand as a 'use_operand_p' in the variable USEVAR.
 235    ITER is an ssa_op_iter structure used to control the loop.  */
 236 #define FOR_EACH_SSA_USE_OPERAND(USEVAR, STMT, ITER, FLAGS)     \
 237   for (USEVAR = op_iter_init_use (&(ITER), STMT, FLAGS);        \
 238        !op_iter_done (&(ITER));                                 \
 239        USEVAR = op_iter_next_use (&(ITER)))
 240
 241 /* This macro executes a loop over the operands of STMT specified in FLAG,
 242    returning each operand as a 'def_operand_p' in the variable DEFVAR.
 243    ITER is an ssa_op_iter structure used to control the loop.  */
 244 #define FOR_EACH_SSA_DEF_OPERAND(DEFVAR, STMT, ITER, FLAGS)     \
 245   for (DEFVAR = op_iter_init_def (&(ITER), STMT, FLAGS);        \
 246        !op_iter_done (&(ITER));                                 \
 247        DEFVAR = op_iter_next_def (&(ITER)))
 248
 249 /* This macro executes a loop over the V_MAY_DEF operands of STMT.  The def
 250    and use for each V_MAY_DEF is returned in DEFVAR and USEVAR.
 251    ITER is an ssa_op_iter structure used to control the loop.  */
 252 #define FOR_EACH_SSA_MAYDEF_OPERAND(DEFVAR, USEVAR, STMT, ITER) \
 253   for (op_iter_init_maydef (&(ITER), STMT, &(USEVAR), &(DEFVAR));       \
 254        !op_iter_done (&(ITER));                                 \
 255        op_iter_next_maymustdef (&(USEVAR), &(DEFVAR), &(ITER)))
 256
 257 /* This macro executes a loop over the V_MUST_DEF operands of STMT.  The def
 258    and kill for each V_MUST_DEF is returned in DEFVAR and KILLVAR.
 259    ITER is an ssa_op_iter structure used to control the loop.  */
 260 #define FOR_EACH_SSA_MUSTDEF_OPERAND(DEFVAR, KILLVAR, STMT, ITER)       \
 261   for (op_iter_init_mustdef (&(ITER), STMT, &(KILLVAR), &(DEFVAR));     \
 262        !op_iter_done (&(ITER));                                 \
 263        op_iter_next_maymustdef (&(KILLVAR), &(DEFVAR), &(ITER)))
 264
 265 /* This macro executes a loop over the V_{MUST,MAY}_DEF of STMT.  The def
 266    and kill for each V_{MUST,MAY}_DEF is returned in DEFVAR and KILLVAR.
 267    ITER is an ssa_op_iter structure used to control the loop.  */
 268 #define FOR_EACH_SSA_MUST_AND_MAY_DEF_OPERAND(DEFVAR, KILLVAR, STMT, ITER)\
 269   for (op_iter_init_must_and_may_def (&(ITER), STMT, &(KILLVAR), &(DEFVAR));\
 270        !op_iter_done (&(ITER));                                 \
 271        op_iter_next_maymustdef (&(KILLVAR), &(DEFVAR), &(ITER)))
 272
 273 /* This macro will execute a loop over all the arguments of a PHI which
 274    match FLAGS.   A use_operand_p is always returned via USEVAR.  FLAGS
 275    can be either SSA_OP_USE or SSA_OP_VIRTUAL_USES or SSA_OP_ALL_USES.  */
 276 #define FOR_EACH_PHI_ARG(USEVAR, STMT, ITER, FLAGS)             \
 277   for ((USEVAR) = op_iter_init_phiuse (&(ITER), STMT, FLAGS);   \
 278        !op_iter_done (&(ITER));                                 \
 279        (USEVAR) = op_iter_next_use (&(ITER)))
 280
 281
 282 /* This macro will execute a loop over a stmt, regardless of whether it is
 283    a real stmt or a PHI node, looking at the USE nodes matching FLAGS.  */
 284 #define FOR_EACH_PHI_OR_STMT_USE(USEVAR, STMT, ITER, FLAGS)     \
 285   for ((USEVAR) = (TREE_CODE (STMT) == PHI_NODE                 \
 286                    ? op_iter_init_phiuse (&(ITER), STMT, FLAGS) \
 287                    : op_iter_init_use (&(ITER), STMT, FLAGS));  \
 288        !op_iter_done (&(ITER));                                 \
 289        (USEVAR) = op_iter_next_use (&(ITER)))
 290
 291 /* This macro will execute a loop over a stmt, regardless of whether it is
 292    a real stmt or a PHI node, looking at the DEF nodes matching FLAGS.  */
 293 #define FOR_EACH_PHI_OR_STMT_DEF(DEFVAR, STMT, ITER, FLAGS)     \
 294   for ((DEFVAR) = (TREE_CODE (STMT) == PHI_NODE                 \
 295                    ? op_iter_init_phidef (&(ITER), STMT, FLAGS) \
 296                    : op_iter_init_def (&(ITER), STMT, FLAGS));  \
 297        !op_iter_done (&(ITER));                                 \
 298        (DEFVAR) = op_iter_next_def (&(ITER)))
 299
 300 /* This macro returns an operand in STMT as a tree if it is the ONLY
 301    operand matching FLAGS.  If there are 0 or more than 1 operand matching
 302    FLAGS, then NULL_TREE is returned.  */
 303 #define SINGLE_SSA_TREE_OPERAND(STMT, FLAGS)                    \
 304   single_ssa_tree_operand (STMT, FLAGS)
 305
 306 /* This macro returns an operand in STMT as a use_operand_p if it is the ONLY
 307    operand matching FLAGS.  If there are 0 or more than 1 operand matching
 308    FLAGS, then NULL_USE_OPERAND_P is returned.  */
 309 #define SINGLE_SSA_USE_OPERAND(STMT, FLAGS)                     \
 310   single_ssa_use_operand (STMT, FLAGS)
 311
 312 /* This macro returns an operand in STMT as a def_operand_p if it is the ONLY
 313    operand matching FLAGS.  If there are 0 or more than 1 operand matching
 314    FLAGS, then NULL_DEF_OPERAND_P is returned.  */
 315 #define SINGLE_SSA_DEF_OPERAND(STMT, FLAGS)                     \
 316   single_ssa_def_operand (STMT, FLAGS)
 317
 318 /* This macro returns TRUE if there are no operands matching FLAGS in STMT.  */
 319 #define ZERO_SSA_OPERANDS(STMT, FLAGS)  zero_ssa_operands (STMT, FLAGS)
 320
 321 /* This macro counts the number of operands in STMT matching FLAGS.  */
 322 #define NUM_SSA_OPERANDS(STMT, FLAGS)   num_ssa_operands (STMT, FLAGS)
 323
 324 #endif  /* GCC_TREE_SSA_OPERANDS_H  */