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 /**
  34  * Get the number of bits set in a word.
  35  */
  36 static INLINE int pop(int i) {
  37         unsigned x = (unsigned) i;
  38         x = ((x >> 1) & 0x55555555);
  39         x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
  40         x = (x + (x >> 4)) & 0x0f0f0f0f;
  41         x = x + (x >> 8);
  42         x = x + (x >> 16);
  43         return (int) (x & 0x3f);
  44 }
  45
  46 /**
  47  * Get the number of bits differing in two variables.
  48  */
  49 static INLINE int dist(int x, int y) {
  50         return pop(x ^ y);
  51 }
  52
  53
  54 #define MAX_SIG_COUNT 8
  55 #define MAX_ARG_COUNT 10
  56
  57 typedef struct {
  58         int num;    /**< A sequential number (one opcode can have multiple signatures. */
  59         rflct_arg_t args[]; /**< The signature. */
  60 } rflct_args_t;
  61
  62 typedef struct {
  63         opcode opc;
  64         const char *name;
  65         int commutative;
  66         int sig_count;
  67         rflct_arg_t *sigs[MAX_SIG_COUNT];
  68 } rflct_opcode_t;
  69
  70 static struct obstack obst;
  71
  72 static rflct_opcode_t **opcodes = NULL;
  73
  74 static int opcodes_size = 0;
  75
  76 static INLINE void assure_opcode_capacity(int opcode)
  77 {
  78         if(opcode >= opcodes_size) {
  79                 int new_size = 2 * opcode;
  80                 rflct_opcode_t **new_opcodes = xcalloc(new_size, sizeof(new_opcodes[0]));
  81
  82                 if(opcodes != NULL) {
  83                         memcpy(new_opcodes, opcodes, sizeof(*opcodes) * opcodes_size);
  84                         free(opcodes);
  85                 }
  86
  87                 opcodes = new_opcodes;
  88                 opcodes_size = new_size;
  89         }
  90 }
  91
  92
  93 #if 0
  94 #define OPCODES_COUNT (sizeof(opcodes) / sizeof(opcodes[0]))
  95 #endif
  96 #define OPCODES_COUNT opcodes_size
  97
  98
  99 rflct_mode_class_t rflct_get_mode_class(const ir_mode *mode) {
 100         mode_sort sort = get_mode_sort(mode);
 101
 102         switch(sort) {
 103                 case irms_auxiliary:
 104                 case irms_control_flow:
 105                         if(mode == mode_BB)
 106                                 return RFLCT_MC(BB);
 107                         else if(mode == mode_X)
 108                                 return RFLCT_MC(X);
 109                 case irms_memory:
 110                         return RFLCT_MC(Mem);
 111                 case irms_internal_boolean:
 112                         return RFLCT_MC(Bool);
 113                 case irms_int_number:
 114                         return mode_is_signed(mode) ? RFLCT_MC(IntS) : RFLCT_MC(IntU);
 115                 case irms_float_number:
 116                         return RFLCT_MC(Float);
 117                 case irms_reference:
 118                         return RFLCT_MC(Ref);
 119                 case irms_character:
 120                         return RFLCT_MC(Char);
 121         }
 122
 123         return RFLCT_MC(None);
 124 }
 125
 126 static INLINE const rflct_opcode_t *get_opcode(opcode opc) {
 127         assert(opc >= 0 && opc < OPCODES_COUNT && "Invalid opcode");
 128         return opcodes[opc];
 129 }
 130
 131 static INLINE const rflct_arg_t *get_args(opcode opc, int sig) {
 132         const rflct_opcode_t *opcode = get_opcode(opc);
 133         assert(sig >= 0 && sig < opcode->sig_count
 134                         && "Invalid signature");
 135         return opcode->sigs[sig];
 136 }
 137
 138 #define GET_OPCODE(opc) get_opcode(opc)
 139 #define GET_ARGS(opc,args) get_args(opc, args)
 140
 141 int rflct_get_signature_count(opcode opc) {
 142         const rflct_opcode_t *opcode = GET_OPCODE(opc);
 143         return opcode->sig_count;
 144 }
 145
 146 int rflct_get_in_args_count(opcode opc, int sig) {
 147         const rflct_arg_t *args = GET_ARGS(opc, sig);
 148         int res = 0, i = 0;
 149
 150         for(i = 0; args[i].name != NULL; i++);
 151         for(res = 0, i += 1; args[i].name != NULL; res++, i++);
 152         return res;
 153 }
 154
 155 int rflct_get_out_args_count(opcode opc, int sig) {
 156         const rflct_arg_t *args = GET_ARGS(opc, sig);
 157         int i = 0;
 158         for(i = 0; args[i].name != NULL; i++);
 159         return i;
 160 }
 161
 162
 163 const rflct_arg_t *rflct_get_in_args(opcode opc, int sig) {
 164         const rflct_arg_t *args = GET_ARGS(opc, sig);
 165         int i;
 166
 167         for(i = 0; args[i].name != NULL; i++);
 168         return &args[i + 1];
 169 }
 170
 171 const rflct_arg_t *rflct_get_out_args(opcode opc, int sig) {
 172         return GET_ARGS(opc, sig);
 173 }
 174
 175 int rflct_signature_match(const ir_node *irn, int sig) {
 176         opcode op = get_irn_opcode(irn);
 177         const rflct_arg_t *args = rflct_get_in_args(op, sig);
 178         int dst = 0;
 179         int i, j;
 180
 181         for(i = 0, j = -1; RFLCT_ARG_VALID(&args[i])
 182                         && j < get_irn_arity(irn); j++) {
 183
 184                 ir_node *child = get_irn_n(irn, j);
 185                 const rflct_arg_t *arg = &args[i];
 186                 rflct_mode_class_t mc = rflct_get_mode_class(get_irn_mode(child));
 187
 188                 if(arg->accepted_modes & mc)
 189                         dst += dist(arg->accepted_modes, mc);
 190                 else
 191                         return INT_MAX;
 192
 193                 if(!arg->is_variadic)
 194                         i++;
 195         }
 196
 197         return dst;
 198 }
 199
 200 int rflct_get_signature(const ir_node *irn) {
 201         const rflct_opcode_t *opc = GET_OPCODE(get_irn_opcode(irn));
 202         int min_dist = INT_MAX;
 203         int min_sig = INT_MAX;
 204         int i;
 205
 206         for(i = 0; i < opc->sig_count; i++) {
 207                 int dist = rflct_signature_match(irn, i);
 208                 if(dist < min_dist) {
 209                         min_dist = dist;
 210                         min_sig = i;
 211                 }
 212         }
 213
 214         return min_sig;
 215 }
 216
 217 static const char *rflct_mode_class_atomic_name(rflct_mode_class_t mc) {
 218 #define XXX(_mc) case RFLCT_MC(_mc): return #_mc
 219         switch(mc) {
 220                 XXX(None);
 221                 XXX(Mem);
 222                 XXX(Bool);
 223                 XXX(IntS);
 224                 XXX(IntU);
 225                 XXX(Float);
 226                 XXX(Ref);
 227                 XXX(Char);
 228                 XXX(X);
 229                 XXX(BB);
 230                 XXX(Int);
 231                 XXX(Intb);
 232                 XXX(Num);
 233                 XXX(NumP);
 234                 XXX(Data);
 235                 XXX(Datab);
 236                 XXX(DataM);
 237                 XXX(DataMX);
 238                 XXX(Lh);
 239                 default:
 240                 return "";
 241         }
 242 #undef XXX
 243 }
 244
 245 static void rflct_mode_class_comb_name_obst(struct obstack *obst,
 246                 rflct_mode_class_t mc) {
 247         const char *res = rflct_mode_class_atomic_name(mc);
 248
 249         if(strlen(res) == 0) {
 250                 const char *prefix = "";
 251                 int mask;
 252
 253                 obstack_1grow(obst, '{');
 254                 for(mask = 1; mask != 0; mask <<= 1) {
 255                         if(mask & mc) {
 256                                 const char *s = rflct_mode_class_atomic_name(mask);
 257                                 obstack_grow_str(obst, s);
 258                                 obstack_grow_str(obst, prefix);
 259                                 prefix = "|";
 260                         }
 261                 }
 262                 obstack_1grow(obst, '}');
 263
 264         } else
 265                 obstack_grow(obst, res, strlen(res));
 266 }
 267
 268 char *rflct_mode_class_name(char *str, int n, rflct_mode_class_t mc) {
 269         struct obstack obst;
 270         const char *res;
 271
 272         obstack_init(&obst);
 273
 274         rflct_mode_class_comb_name_obst(&obst, mc);
 275         obstack_1grow(&obst, 0);
 276         res = obstack_finish(&obst);
 277
 278         strncpy(str, res, n);
 279
 280         obstack_free(&obst, NULL);
 281
 282         return str;
 283 }
 284
 285 static void rflct_obstack_grow_args(struct obstack *obst,
 286                 const rflct_arg_t *args) {
 287         const rflct_arg_t *arg;
 288         const char *prefix = "";
 289
 290         for(arg = args; RFLCT_ARG_VALID(arg); arg++) {
 291                 obstack_grow_str(obst, prefix);
 292                 obstack_grow_str(obst, arg->name);
 293                 if(arg->is_variadic)
 294                         obstack_1grow(obst, '*');
 295                 obstack_1grow(obst, ':');
 296                 rflct_mode_class_comb_name_obst(obst, arg->accepted_modes);
 297                 prefix = ", ";
 298         }
 299
 300 }
 301
 302 char *rflct_to_string(char *buf, int n, opcode opc, int sig) {
 303         struct obstack obst;
 304         char *s;
 305         const rflct_opcode_t *opcode = GET_OPCODE(opc);
 306
 307         obstack_init(&obst);
 308
 309         obstack_1grow(&obst, '(');
 310         rflct_obstack_grow_args(&obst, rflct_get_out_args(opc, sig));
 311
 312         obstack_grow_str(&obst, ") = ");
 313         obstack_grow_str(&obst, opcode->name);
 314         obstack_1grow(&obst, '(');
 315
 316         rflct_obstack_grow_args(&obst, rflct_get_in_args(opc, sig));
 317
 318         obstack_1grow(&obst, ')');
 319         obstack_1grow(&obst, 0);
 320         s = obstack_finish(&obst);
 321         strncpy(buf, s, n);
 322         obstack_free(&obst, NULL);
 323
 324         return buf;
 325 }
 326
 327 #define NON_VARIADIC 0
 328 #define VARIADIC     1
 329
 330 #define ARG(name,modes) \
 331 _ARG(name, modes, NON_VARIADIC, -1)
 332
 333 #define ARG_SAME(name,modes,mode_same) \
 334 _ARG(name, modes, NON_VARIADIC, mode_same)
 335
 336 #define VARG(name,modes) \
 337 _ARG(name, modes, VARIADIC, 0)
 338
 339 #define VARG_SAME(name,modes) \
 340 _ARG(name, modes, VARIADIC, 1)
 341
 342 #define MARK \
 343 _ARG(NULL, None, NON_VARIADIC, -1)
 344
 345 #define FINISH \
 346 _ARG(NULL, None, NON_VARIADIC, 0)
 347
 348 #define BLOCK ARG("Block", BB)
 349
 350         static void init_ops(void) {
 351
 352                 int curr_sig;
 353                 rflct_opcode_t *opcode;
 354
 355                 obstack_init(&obst);
 356
 357                 assure_opcode_capacity(iro_MaxOpcode);
 358
 359
 360 #define BEGIN_OP(op)  \
 361                 curr_sig = 0; \
 362                         opcode = obstack_alloc(&obst, sizeof(*opcode)); \
 363                         opcode->opc = iro_ ## op; \
 364                         opcode->name = #op; \
 365                         opcodes[opcode->opc] = opcode;
 366
 367
 368 #define BEGIN_ARGS
 369
 370 #define _ARG(_name,_modes,_variadic,_mode_equals) \
 371                 { \
 372                         rflct_arg_t args; \
 373                                 args.name = _name; \
 374                                 args.accepted_modes = RFLCT_MC(_modes); \
 375                                 args.is_variadic = _variadic; \
 376                                 args.mode_equals = _mode_equals; \
 377                                 obstack_grow(&obst, &args, sizeof(args)); \
 378                 }
 379
 380 #define END_ARGS \
 381                 { \
 382                         FINISH; \
 383                         assert(curr_sig < MAX_SIG_COUNT && "Mind the maximum number of signatures"); \
 384                         opcode->sigs[curr_sig++] = obstack_finish(&obst); \
 385                         opcode->sig_count = curr_sig; \
 386                 }
 387
 388 #define END_OP
 389
 390 #include "irreflect.def"
 391
 392 #undef BEGIN_ARGS
 393 #undef END_ARGS
 394 #undef BEGIN_OP
 395 #undef END_OP
 396         }
 397
 398 #undef _ARG
 399 #define _ARG(_name,_modes,_var,_me) \
 400 arg->name = _name; \
 401         arg->accepted_modes = RFLCT_MC(_modes); \
 402         arg->is_variadic = _var; \
 403         arg->mode_equals = _me;
 404
 405 void rflct_new_opcode(opcode opc, const char *name, int commutative)
 406 {
 407         rflct_opcode_t *ropc = obstack_alloc(&obst, sizeof(*ropc));
 408
 409         ropc->opc = opc;
 410         ropc->name = name;
 411         ropc->sig_count = 0;
 412         memset(ropc->sigs, 0, sizeof(ropc->sigs));
 413
 414         assure_opcode_capacity(opc);
 415         opcodes[opc] = ropc;
 416 }
 417
 418 int rflct_opcode_add_signature(opcode opc, rflct_sig_t *sig)
 419 {
 420         rflct_arg_t *args = sig->args;
 421         rflct_opcode_t *op = opcodes[opc];
 422         int i;
 423
 424         assert(op && "Illegal opcode");
 425
 426         for(i = 0; i < MAX_SIG_COUNT && op->sigs[i] != NULL; i++);
 427
 428         if(i >= MAX_SIG_COUNT)
 429                 return 0;
 430
 431         op->sigs[op->sig_count++] = args;
 432
 433         free(sig);
 434         return 1;
 435 }
 436
 437
 438 rflct_sig_t *rflct_signature_allocate(int defs, int uses)
 439 {
 440         rflct_sig_t *sig = xmalloc(sizeof(*sig));
 441
 442         rflct_arg_t *args =
 443                 obstack_alloc(&obst, sizeof(*args) * (defs + uses + 2));
 444
 445         rflct_arg_t *arg = args + defs;
 446         MARK;
 447
 448         arg = args + defs + uses + 1;
 449         FINISH;
 450
 451         sig->defs = defs;
 452         sig->uses = uses;
 453         sig->args = args;
 454
 455         return sig;
 456 }
 457
 458 int rflct_signature_get_index(const rflct_sig_t *sig, int is_use, int num)
 459 {
 460         return is_use ? num + sig->defs + 1 : num;
 461 }
 462
 463 #undef _ARG
 464 #define _ARG(_name,_modes,_var,_me) \
 465 arg->name = _name; \
 466         arg->accepted_modes = _modes; \
 467         arg->is_variadic = _var; \
 468         arg->mode_equals = _me;
 469
 470 int rflct_signature_set_arg(rflct_sig_t *sig, int is_use, int num,
 471                 const char *name, rflct_mode_class_t mc, int is_variadic, int mode_equals)
 472 {
 473         int index = rflct_signature_get_index(sig, is_use, num);
 474         rflct_arg_t *arg = sig->args + index;
 475         _ARG(name, mc, is_variadic, mode_equals);
 476         return index;
 477 }
 478
 479
 480 void firm_init_rflct(void) {
 481         init_ops();
 482 }
 483
 484 #undef VARIADIC
 485 #undef NON_VARIADIC