nsz Git - libfirm/blob - ir/ir/irreflect.c

   1 /**
   2  * @file irreflect.c
   3  * @date 9.9.2004
   4  * @author Sebastian Hack
   5  * @brief Reflection for Firm operands.
   6  *
   7  * $Id$
   8  */
   9 #ifdef HAVE_CONFIG_H
  10 # include "config.h"
  11 #endif
  12
  13 #ifdef HAVE_STDLIB_H
  14 # include <stdlib.h>
  15 #endif
  16 #ifdef HAVE_STRING_H
  17 # include <string.h>
  18 #endif
  19 #ifdef HAVE_STRINGS_H
  20 # include <strings.h>
  21 #endif
  22
  23 #include "obst.h"
  24
  25 #include "irmode.h"
  26 #include "irreflect.h"
  27
  28 #define obstack_grow_str(obst,s) obstack_grow((obst), (s), strlen((s)))
  29 #define obstack_grow_str_const(obst,s) obstack_grow((obst), (s), sizeof((s)))
  30
  31 extern int obstack_printf(struct obstack *obst, const char *fmt, ...);
  32
  33 #define INLINE inline
  34
  35 /**
  36  * Get the number of bits set in a word.
  37  */
  38 static INLINE int pop(int i) {
  39         unsigned x = (unsigned) i;
  40         x = ((x >> 1) & 0x55555555);
  41         x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
  42         x = (x + (x >> 4)) & 0x0f0f0f0f;
  43         x = x + (x >> 8);
  44         x = x + (x >> 16);
  45         return (int) (x & 0x3f);
  46 }
  47
  48 /**
  49  * Get the number of bits differing in two variables.
  50  */
  51 static INLINE int dist(int x, int y) {
  52         return pop(x ^ y);
  53 }
  54
  55
  56 #define MAX_SIG_COUNT 8
  57 #define MAX_ARG_COUNT 10
  58
  59 typedef struct {
  60         int num;    /**< A sequential number (one opcode can have multiple signatures. */
  61         rflct_arg_t args[]; /**< The signature. */
  62 } rflct_args_t;
  63
  64 typedef struct {
  65         opcode opc;
  66         const char *name;
  67         bool commutative;
  68         int sig_count;
  69         rflct_arg_t *sigs[MAX_SIG_COUNT];
  70 } rflct_opcode_t;
  71
  72 static struct obstack obst;
  73
  74 static rflct_opcode_t **opcodes = NULL;
  75
  76 static int opcodes_size = 0;
  77
  78 static INLINE void assure_opcode_capacity(int opcode)
  79 {
  80         if(opcode >= opcodes_size) {
  81                 int new_size = 2 * opcode;
  82                 rflct_opcode_t **new_opcodes = xcalloc(new_size, sizeof(new_opcodes[0]));
  83
  84                 if(opcodes != NULL) {
  85                         memcpy(new_opcodes, opcodes, sizeof(*opcodes) * opcodes_size);
  86                         free(opcodes);
  87                 }
  88
  89                 opcodes = new_opcodes;
  90                 opcodes_size = new_size;
  91         }
  92 }
  93
  94
  95 #if 0
  96 #define OPCODES_COUNT (sizeof(opcodes) / sizeof(opcodes[0]))
  97 #endif
  98 #define OPCODES_COUNT opcodes_size
  99
 100
 101 rflct_mode_class_t rflct_get_mode_class(const ir_mode *mode) {
 102         mode_sort sort = get_mode_sort(mode);
 103
 104         switch(sort) {
 105                 case irms_auxiliary:
 106                 case irms_control_flow:
 107                         if(mode == mode_BB)
 108                                 return RFLCT_MC(BB);
 109                         else if(mode == mode_X)
 110                                 return RFLCT_MC(X);
 111                 case irms_memory:
 112                         return RFLCT_MC(Mem);
 113                 case irms_internal_boolean:
 114                         return RFLCT_MC(Bool);
 115                 case irms_int_number:
 116                         return mode_is_signed(mode) ? RFLCT_MC(IntS) : RFLCT_MC(IntU);
 117                 case irms_float_number:
 118                         return RFLCT_MC(Float);
 119                 case irms_reference:
 120                         return RFLCT_MC(Ref);
 121                 case irms_character:
 122                         return RFLCT_MC(Char);
 123         }
 124
 125         return RFLCT_MC(None);
 126 }
 127
 128 static INLINE const rflct_opcode_t *get_opcode(opcode opc) {
 129         assert(opc >= 0 && opc < OPCODES_COUNT && "Invalid opcode");
 130         return opcodes[opc];
 131 }
 132
 133 static INLINE const rflct_arg_t *get_args(opcode opc, int sig) {
 134         const rflct_opcode_t *opcode = get_opcode(opc);
 135         assert(sig >= 0 && sig < opcode->sig_count
 136                         && "Invalid signature");
 137         return opcode->sigs[sig];
 138 }
 139
 140 #define GET_OPCODE(opc) get_opcode(opc)
 141 #define GET_ARGS(opc,args) get_args(opc, args)
 142
 143 int rflct_get_signature_count(opcode opc) {
 144         const rflct_opcode_t *opcode = GET_OPCODE(opc);
 145         return opcode->sig_count;
 146 }
 147
 148 int rflct_get_in_args_count(opcode opc, int sig) {
 149         const rflct_arg_t *args = GET_ARGS(opc, sig);
 150         int res = 0, i = 0;
 151
 152         for(i = 0; args[i].name != NULL; i++);
 153         for(res = 0, i += 1; args[i].name != NULL; res++, i++);
 154         return res;
 155 }
 156
 157 int rflct_get_out_args_count(opcode opc, int sig) {
 158         const rflct_arg_t *args = GET_ARGS(opc, sig);
 159         int i = 0;
 160         for(i = 0; args[i].name != NULL; i++);
 161         return i;
 162 }
 163
 164
 165 const rflct_arg_t *rflct_get_in_args(opcode opc, int sig) {
 166         const rflct_arg_t *args = GET_ARGS(opc, sig);
 167         int i;
 168
 169         for(i = 0; args[i].name != NULL; i++);
 170         return &args[i + 1];
 171 }
 172
 173 const rflct_arg_t *rflct_get_out_args(opcode opc, int sig) {
 174         return GET_ARGS(opc, sig);
 175 }
 176
 177 int rflct_signature_match(const ir_node *irn, int sig) {
 178         opcode op = get_irn_opcode(irn);
 179         const rflct_arg_t *args = rflct_get_in_args(op, sig);
 180         int dst = 0;
 181         int i, j;
 182
 183         for(i = 0, j = -1; RFLCT_ARG_VALID(&args[i])
 184                         && j < get_irn_arity(irn); j++) {
 185
 186                 ir_node *child = get_irn_n(irn, j);
 187                 const rflct_arg_t *arg = &args[i];
 188                 rflct_mode_class_t mc = rflct_get_mode_class(get_irn_mode(child));
 189
 190                 if(arg->accepted_modes & mc)
 191                         dst += dist(arg->accepted_modes, mc);
 192                 else
 193                         return INT_MAX;
 194
 195                 if(!arg->is_variadic)
 196                         i++;
 197         }
 198
 199         return dst;
 200 }
 201
 202 int rflct_get_signature(const ir_node *irn) {
 203         const rflct_opcode_t *opc = GET_OPCODE(get_irn_opcode(irn));
 204         int min_dist = INT_MAX;
 205         int min_sig = INT_MAX;
 206         int i;
 207
 208         for(i = 0; i < opc->sig_count; i++) {
 209                 int dist = rflct_signature_match(irn, i);
 210                 if(dist < min_dist) {
 211                         min_dist = dist;
 212                         min_sig = i;
 213                 }
 214         }
 215
 216         return min_sig;
 217 }
 218
 219 static const char *rflct_mode_class_atomic_name(rflct_mode_class_t mc) {
 220 #define XXX(_mc) case RFLCT_MC(_mc): return #_mc
 221         switch(mc) {
 222                 XXX(None);
 223                 XXX(Mem);
 224                 XXX(Bool);
 225                 XXX(IntS);
 226                 XXX(IntU);
 227                 XXX(Float);
 228                 XXX(Ref);
 229                 XXX(Char);
 230                 XXX(X);
 231                 XXX(BB);
 232                 XXX(Int);
 233                 XXX(Intb);
 234                 XXX(Num);
 235                 XXX(NumP);
 236                 XXX(Data);
 237                 XXX(Datab);
 238                 XXX(DataM);
 239                 XXX(DataMX);
 240                 XXX(Lh);
 241                 default:
 242                 return "";
 243         }
 244 #undef XXX
 245 }
 246
 247 static void rflct_mode_class_comb_name_obst(struct obstack *obst,
 248                 rflct_mode_class_t mc) {
 249         const char *res = rflct_mode_class_atomic_name(mc);
 250
 251         if(strlen(res) == 0) {
 252                 const char *prefix = "";
 253                 int mask;
 254
 255                 obstack_1grow(obst, '{');
 256                 for(mask = 1; mask != 0; mask <<= 1) {
 257                         if(mask & mc) {
 258                                 const char *s = rflct_mode_class_atomic_name(mask);
 259                                 obstack_grow_str(obst, s);
 260                                 obstack_grow_str(obst, prefix);
 261                                 prefix = "|";
 262                         }
 263                 }
 264                 obstack_1grow(obst, '}');
 265
 266         } else
 267                 obstack_grow(obst, res, strlen(res));
 268 }
 269
 270 char *rflct_mode_class_name(char *str, int n, rflct_mode_class_t mc) {
 271         struct obstack obst;
 272         const char *res;
 273
 274         obstack_init(&obst);
 275
 276         rflct_mode_class_comb_name_obst(&obst, mc);
 277         obstack_1grow(&obst, 0);
 278         res = obstack_finish(&obst);
 279
 280         strncpy(str, res, n);
 281
 282         obstack_free(&obst, NULL);
 283
 284         return str;
 285 }
 286
 287 static void rflct_obstack_grow_args(struct obstack *obst,
 288                 const rflct_arg_t *args) {
 289         const rflct_arg_t *arg;
 290         const char *prefix = "";
 291
 292         for(arg = args; RFLCT_ARG_VALID(arg); arg++) {
 293                 obstack_grow_str(obst, prefix);
 294                 obstack_grow_str(obst, arg->name);
 295                 if(arg->is_variadic)
 296                         obstack_1grow(obst, '*');
 297                 obstack_1grow(obst, ':');
 298                 rflct_mode_class_comb_name_obst(obst, arg->accepted_modes);
 299                 prefix = ", ";
 300         }
 301
 302 }
 303
 304 char *rflct_to_string(char *buf, int n, opcode opc, int sig) {
 305         struct obstack obst;
 306         char *s;
 307         const rflct_opcode_t *opcode = GET_OPCODE(opc);
 308
 309         obstack_init(&obst);
 310
 311         obstack_1grow(&obst, '(');
 312         rflct_obstack_grow_args(&obst, rflct_get_out_args(opc, sig));
 313
 314         obstack_grow_str(&obst, ") = ");
 315         obstack_grow_str(&obst, opcode->name);
 316         obstack_1grow(&obst, '(');
 317
 318         rflct_obstack_grow_args(&obst, rflct_get_in_args(opc, sig));
 319
 320         obstack_1grow(&obst, ')');
 321         obstack_1grow(&obst, 0);
 322         s = obstack_finish(&obst);
 323         strncpy(buf, s, n);
 324         obstack_free(&obst, NULL);
 325
 326         return buf;
 327 }
 328
 329 #define ARG(name,modes) \
 330 _ARG(name, modes, false, -1)
 331
 332 #define ARG_SAME(name,modes,mode_same) \
 333 _ARG(name, modes, false, mode_same)
 334
 335 #define VARG(name,modes) \
 336 _ARG(name, modes, true, 0)
 337
 338 #define VARG_SAME(name,modes) \
 339 _ARG(name, modes, true, 1)
 340
 341 #define MARK \
 342 _ARG(NULL, None, false, -1)
 343
 344 #define FINISH \
 345 _ARG(NULL, None, false, 0)
 346
 347 #define BLOCK ARG("Block", BB)
 348
 349         static void init_ops(void) {
 350
 351                 int curr_sig;
 352                 rflct_opcode_t *opcode;
 353
 354                 obstack_init(&obst);
 355
 356                 assure_opcode_capacity(iro_MaxOpcode);
 357
 358
 359 #define BEGIN_OP(op)  \
 360                 curr_sig = 0; \
 361                         opcode = obstack_alloc(&obst, sizeof(*opcode)); \
 362                         opcode->opc = iro_ ## op; \
 363                         opcode->name = #op; \
 364                         opcodes[opcode->opc] = opcode;
 365
 366
 367 #define BEGIN_ARGS
 368
 369 #define _ARG(_name,_modes,_variadic,_mode_equals) \
 370                 { \
 371                         rflct_arg_t args; \
 372                                 args.name = _name; \
 373                                 args.accepted_modes = RFLCT_MC(_modes); \
 374                                 args.is_variadic = _variadic; \
 375                                 args.mode_equals = _mode_equals; \
 376                                 obstack_grow(&obst, &args, sizeof(args)); \
 377                 }
 378
 379 #define END_ARGS \
 380                 { \
 381                         FINISH; \
 382                         assert(curr_sig < MAX_SIG_COUNT && "Mind the maximum number of signatures"); \
 383                         opcode->sigs[curr_sig++] = obstack_finish(&obst); \
 384                         opcode->sig_count = curr_sig; \
 385                 }
 386
 387 #define END_OP
 388
 389 #include "irreflect.def"
 390
 391 #undef BEGIN_ARGS
 392 #undef END_ARGS
 393 #undef BEGIN_OP
 394 #undef END_OP
 395         }
 396
 397 #undef _ARG
 398 #define _ARG(_name,_modes,_var,_me) \
 399 arg->name = _name; \
 400         arg->accepted_modes = RFLCT_MC(_modes); \
 401         arg->is_variadic = _var; \
 402         arg->mode_equals = _me;
 403
 404 void rflct_new_opcode(opcode opc, const char *name, bool commutative)
 405 {
 406         rflct_opcode_t *ropc = obstack_alloc(&obst, sizeof(*ropc));
 407
 408         ropc->opc = opc;
 409         ropc->name = name;
 410         ropc->sig_count = 0;
 411         memset(ropc->sigs, 0, sizeof(ropc->sigs));
 412
 413         assure_opcode_capacity(opc);
 414         opcodes[opc] = ropc;
 415 }
 416
 417 bool rflct_opcode_add_signature(opcode opc, rflct_sig_t *sig)
 418 {
 419         rflct_arg_t *args = sig->args;
 420         rflct_opcode_t *op = opcodes[opc];
 421         int i;
 422
 423         assert(op && "Illegal opcode");
 424
 425         for(i = 0; i < MAX_SIG_COUNT && op->sigs[i] != NULL; i++);
 426
 427         if(i >= MAX_SIG_COUNT)
 428                 return false;
 429
 430         op->sigs[op->sig_count++] = args;
 431
 432         free(sig);
 433         return true;
 434 }
 435
 436
 437 rflct_sig_t *rflct_signature_allocate(int defs, int uses)
 438 {
 439         rflct_sig_t *sig = xmalloc(sizeof(*sig));
 440
 441         rflct_arg_t *args =
 442                 obstack_alloc(&obst, sizeof(*args) * (defs + uses + 2));
 443
 444         rflct_arg_t *arg = args + defs;
 445         MARK;
 446
 447         arg = args + defs + uses + 1;
 448         FINISH;
 449
 450         sig->defs = defs;
 451         sig->uses = uses;
 452         sig->args = args;
 453
 454         return sig;
 455 }
 456
 457 int rflct_signature_get_index(const rflct_sig_t *sig, bool is_use, int num)
 458 {
 459         return is_use ? num + sig->defs + 1 : num;
 460 }
 461
 462 #undef _ARG
 463 #define _ARG(_name,_modes,_var,_me) \
 464 arg->name = _name; \
 465         arg->accepted_modes = _modes; \
 466         arg->is_variadic = _var; \
 467         arg->mode_equals = _me;
 468
 469 int rflct_signature_set_arg(rflct_sig_t *sig, bool is_use, int num,
 470                 const char *name, rflct_mode_class_t mc, bool is_variadic, int mode_equals)
 471 {
 472         int index = rflct_signature_get_index(sig, is_use, num);
 473         rflct_arg_t *arg = sig->args + index;
 474         _ARG(name, mc, is_variadic, mode_equals);
 475         return index;
 476 }
 477
 478
 479 void firm_init_rflct(void) {
 480         init_ops();
 481 }