src/vm/jit/parse.c

   1 /* src/vm/jit/parse.c - parser for JavaVM to intermediate code translation
   2
   3    Copyright (C) 1996-2005, 2006 R. Grafl, A. Krall, C. Kruegel,
   4    C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
   5    E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
   6    J. Wenninger, Institut f. Computersprachen - TU Wien
   7
   8    This file is part of CACAO.
   9
  10    This program is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU General Public License as
  12    published by the Free Software Foundation; either version 2, or (at
  13    your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful, but
  16    WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  23    02110-1301, USA.
  24
  25    Contact: cacao@cacaojvm.org
  26
  27    Author: Andreas Krall
  28
  29    Changes: Carolyn Oates
  30             Edwin Steiner
  31             Joseph Wenninger
  32             Christian Thalinger
  33
  34    $Id: parse.c 5375 2006-09-06 16:01:23Z edwin $
  35
  36 */
  37
  38
  39 #include "config.h"
  40
  41 #include <assert.h>
  42 #include <string.h>
  43
  44 #include "vm/types.h"
  45
  46 #include "mm/memory.h"
  47 #include "native/native.h"
  48
  49 #if defined(ENABLE_THREADS)
  50 # include "threads/native/lock.h"
  51 #endif
  52
  53 #include "toolbox/logging.h"
  54 #include "vm/builtin.h"
  55 #include "vm/exceptions.h"
  56 #include "vm/global.h"
  57 #include "vm/linker.h"
  58 #include "vm/loader.h"
  59 #include "vm/resolve.h"
  60 #include "vm/options.h"
  61 #include "vm/statistics.h"
  62 #include "vm/stringlocal.h"
  63 #include "vm/suck.h"
  64 #include "vm/jit/asmpart.h"
  65 #include "vm/jit/jit.h"
  66 #include "vm/jit/parse.h"
  67 #include "vm/jit/patcher.h"
  68 #include "vm/jit/loop/loop.h"
  69
  70 #define INSTRUCTIONS_INCREMENT  5  /* number of additional instructions to    */
  71                                    /* allocate if space runs out              */
  72
  73
  74 /* parserdata_t ***************************************************************/
  75
  76 typedef struct parsedata_t parsedata_t;
  77
  78 struct parsedata_t {
  79         instruction *instructions;          /* instruction array                  */
  80         s4           instructionslength;    /* length of the instruction array    */
  81         u1          *instructionstart;
  82 };
  83
  84
  85 /* parse_setup *****************************************************************
  86
  87    Fills the passed parsedata_t structure.
  88
  89 *******************************************************************************/
  90
  91 static void parse_setup(jitdata *jd, parsedata_t *pd)
  92 {
  93         methodinfo *m;
  94
  95         /* get required compiler data */
  96
  97         m = jd->m;
  98
  99         /* Allocate instruction array and block index table (1 additional
 100            for end ipc). */
 101
 102         jd->new_basicblockindex = DMNEW(s4, m->jcodelength + 1);
 103         pd->instructionstart = DMNEW(u1, m->jcodelength + 1);
 104
 105         MZERO(jd->new_basicblockindex, s4, m->jcodelength + 1);
 106         MZERO(pd->instructionstart, u1, m->jcodelength + 1);
 107
 108         /* Set the length of the instruction array.  We simply add 5 more
 109            instruction, as this seems to be a reasonable value. */
 110
 111         pd->instructionslength = m->jcodelength + 1;
 112
 113         /* allocate the instruction array */
 114
 115         pd->instructions = DMNEW(instruction, pd->instructionslength);
 116
 117         /* Zero the intermediate instructions array so we don't have any
 118            invalid pointers in it if we cannot finish stack_analyse(). */
 119
 120         MZERO(pd->instructions, instruction, pd->instructionslength);
 121 }
 122
 123
 124 /* parse_check_instructions ****************************************************
 125
 126    Checks if there's enough room in the instructions array for the
 127    required instructions.  If not, reallocate the data structures.
 128
 129 *******************************************************************************/
 130
 131 static instruction *parse_check_instructions(parsedata_t *pd, s4 ipc)
 132 {
 133         puts("REALLOCATE!");
 134
 135         /* increase the size of the instruction array */
 136
 137         pd->instructionslength += INSTRUCTIONS_INCREMENT;
 138
 139         /* reallocate the array */
 140
 141         pd->instructions = DMREALLOC(pd->instructions, instruction, ipc,
 142                                                                  pd->instructionslength);
 143
 144         /* return the iptr */
 145
 146         return pd->instructions + ipc;
 147 }
 148
 149
 150 /*******************************************************************************
 151
 152         function 'parse' scans the JavaVM code and generates intermediate code
 153
 154         During parsing the block index table is used to store at bit pos 0
 155         a flag which marks basic block starts and at position 1 to 31 the
 156         intermediate instruction index. After parsing the block index table
 157         is scanned, for marked positions a block is generated and the block
 158         number is stored in the block index table.
 159
 160 *******************************************************************************/
 161
 162 static exceptiontable * new_fillextable(
 163                                                                         jitdata *jd,
 164                                                                         methodinfo *m,
 165                                                                         exceptiontable *extable,
 166                                                                         exceptiontable *raw_extable,
 167                                                                 int exceptiontablelength,
 168                                                                         int *block_count)
 169 {
 170         int b_count, p, src;
 171
 172         if (exceptiontablelength == 0)
 173                 return extable;
 174
 175         b_count = *block_count;
 176
 177         for (src = exceptiontablelength-1; src >=0; src--) {
 178                 /* the start of the handled region becomes a basic block start */
 179                 p = raw_extable[src].startpc;
 180                 CHECK_BYTECODE_INDEX(p);
 181                 extable->startpc = p;
 182                 MARK_BASICBLOCK(p);
 183
 184                 p = raw_extable[src].endpc; /* see JVM Spec 4.7.3 */
 185                 CHECK_BYTECODE_INDEX_EXCLUSIVE(p);
 186
 187 #if defined(ENABLE_VERIFIER)
 188                 if (p <= raw_extable[src].startpc) {
 189                         exceptions_throw_verifyerror(m,
 190                                 "Invalid exception handler range");
 191                         return NULL;
 192                 }
 193 #endif
 194                 extable->endpc = p;
 195
 196                 /* end of handled region becomes a basic block boundary  */
 197                 /* (If it is the bytecode end, we'll use the special     */
 198                 /* end block that is created anyway.)                    */
 199                 if (p < m->jcodelength)
 200                         MARK_BASICBLOCK(p);
 201
 202                 /* the start of the handler becomes a basic block start  */
 203                 p = raw_extable[src].handlerpc;
 204                 CHECK_BYTECODE_INDEX(p);
 205                 extable->handlerpc = p;
 206                 MARK_BASICBLOCK(p);
 207
 208                 extable->catchtype = raw_extable[src].catchtype;
 209                 extable->next = NULL;
 210                 extable->down = &extable[1];
 211                 extable--;
 212         }
 213
 214         *block_count = b_count;
 215
 216         /* everything ok */
 217         return extable;
 218
 219 #if defined(ENABLE_VERIFIER)
 220 throw_invalid_bytecode_index:
 221         exceptions_throw_verifyerror(m,
 222                                                                  "Illegal bytecode index in exception table");
 223         return NULL;
 224 #endif
 225 }
 226
 227 /*** macro for checking the length of the bytecode ***/
 228
 229 #if defined(ENABLE_VERIFIER)
 230 #define CHECK_END_OF_BYTECODE(neededlength) \
 231         do { \
 232                 if ((neededlength) > m->jcodelength) \
 233                         goto throw_unexpected_end_of_bytecode; \
 234         } while (0)
 235 #else /* !ENABLE_VERIFIER */
 236 #define CHECK_END_OF_BYTECODE(neededlength)
 237 #endif /* ENABLE_VERIFIER */
 238
 239 bool new_parse(jitdata *jd)
 240 {
 241         methodinfo  *m;                     /* method being parsed                */
 242         codeinfo    *code;
 243         codegendata *cd;
 244         parsedata_t  pd;
 245         instruction *iptr;                  /* current ptr into instruction array */
 246         s4           ipc;                   /* intermediate instruction counter   */
 247         s4           p;                     /* java instruction counter           */
 248         s4           nextp;                 /* start of next java instruction     */
 249         s4           opcode;                /* java opcode                        */
 250         s4           i;
 251         s4           j;
 252         int  b_count = 0;           /* basic block counter                      */
 253         int  s_count = 0;           /* stack element counter                    */
 254         bool blockend = false;      /* true if basic block end has been reached */
 255         bool iswide = false;        /* true if last instruction was a wide      */
 256         constant_classref  *cr;
 257         constant_classref  *compr;
 258         classinfo          *c;
 259         builtintable_entry *bte;
 260         constant_FMIref    *mr;
 261         methoddesc         *md;
 262         unresolved_method  *um;
 263         resolve_result_t    result;
 264         u2                  lineindex = 0;
 265         u2                  currentline = 0;
 266         u2                  linepcchange = 0;
 267         u4                  flags;
 268         basicblock         *bptr;
 269
 270 #if defined(NEW_VAR)
 271         int                *local_map; /* local pointer to renaming structore     */
 272                                        /* is assigned to rd->local_map at the end */
 273 #endif
 274         /* get required compiler data */
 275
 276         m    = jd->m;
 277         code = jd->code;
 278         cd   = jd->cd;
 279
 280 #if defined(NEW_VAR)
 281         /* allocate buffers for local variable renaming */
 282         local_map = DMNEW(int, cd->maxlocals * 5);
 283         for (i = 0; i < cd->maxlocals; i++) {
 284                 local_map[i * 5 + 0] = 0;
 285                 local_map[i * 5 + 1] = 0;
 286                 local_map[i * 5 + 2] = 0;
 287                 local_map[i * 5 + 3] = 0;
 288                 local_map[i * 5 + 4] = 0;
 289         }
 290 #endif
 291
 292         /* initialize the parse data structures */
 293
 294         parse_setup(jd, &pd);
 295
 296         /* initialize local variables */
 297
 298         iptr = pd.instructions;
 299         ipc  = 0;
 300
 301         /* compute branch targets of exception table */
 302
 303         if (!new_fillextable(jd, m,
 304                         &(cd->exceptiontable[cd->exceptiontablelength-1]),
 305                         m->exceptiontable,
 306                         m->exceptiontablelength,
 307                         &b_count))
 308         {
 309                 return false;
 310         }
 311
 312         s_count = 1 + m->exceptiontablelength; /* initialize stack element counter   */
 313
 314 #if defined(ENABLE_THREADS)
 315         if (checksync && (m->flags & ACC_SYNCHRONIZED))
 316                 jd->isleafmethod = false;
 317 #endif
 318
 319         /* setup line number info */
 320
 321         currentline = 0;
 322         linepcchange = 0;
 323
 324         if (m->linenumbercount == 0) {
 325                 lineindex = 0;
 326         }
 327         else {
 328                 linepcchange = m->linenumbers[0].start_pc;
 329         }
 330
 331         /*** LOOP OVER ALL BYTECODE INSTRUCTIONS **********************************/
 332
 333         for (p = 0; p < m->jcodelength; p = nextp) {
 334
 335                 /* mark this position as a valid instruction start */
 336
 337                 pd.instructionstart[p] = 1;
 338
 339                 /* change the current line number, if necessary */
 340
 341                 /* XXX rewrite this using pointer arithmetic */
 342
 343                 if (linepcchange == p) {
 344                         if (m->linenumbercount > lineindex) {
 345 next_linenumber:
 346                                 currentline = m->linenumbers[lineindex].line_number;
 347                                 lineindex++;
 348                                 if (lineindex < m->linenumbercount) {
 349                                         linepcchange = m->linenumbers[lineindex].start_pc;
 350                                         if (linepcchange == p)
 351                                                 goto next_linenumber;
 352                                 }
 353                         }
 354                 }
 355
 356 fetch_opcode:
 357                 /* fetch next opcode  */
 358
 359                 opcode = SUCK_BE_U1(m->jcode + p);
 360
 361                 /* some compilers put a JAVA_NOP after a blockend instruction */
 362
 363                 if (blockend && (opcode != JAVA_NOP)) {
 364                         /* start new block */
 365
 366                         MARK_BASICBLOCK(p);
 367                         blockend = false;
 368                 }
 369
 370                 /* store intermediate instruction count (bit 0 mark block starts) */
 371
 372                 jd->new_basicblockindex[p] |= (ipc << 1);
 373
 374                 /* compute next instruction start */
 375
 376                 nextp = p + jcommandsize[opcode];
 377
 378                 CHECK_END_OF_BYTECODE(nextp);
 379
 380                 /* add stack elements produced by this instruction */
 381
 382                 s_count += stackreq[opcode];
 383
 384                 /* We check here for the space of 1 instruction in the
 385                    instruction array.  If an opcode is converted to more than
 386                    1 instruction, this is checked in the corresponding
 387                    case. */
 388
 389                 INSTRUCTIONS_CHECK(1);
 390
 391                 /* translate this bytecode instruction */
 392
 393                 switch (opcode) {
 394
 395                 case JAVA_NOP:
 396                         break;
 397
 398                 /* pushing constants onto the stack ***********************************/
 399
 400                 case JAVA_BIPUSH:
 401                         OP_LOADCONST_I(SUCK_BE_S1(m->jcode + p + 1));
 402                         break;
 403
 404                 case JAVA_SIPUSH:
 405                         OP_LOADCONST_I(SUCK_BE_S2(m->jcode + p + 1));
 406                         break;
 407
 408                 case JAVA_LDC1:
 409                         i = SUCK_BE_U1(m->jcode + p + 1);
 410                         goto pushconstantitem;
 411
 412                 case JAVA_LDC2:
 413                 case JAVA_LDC2W:
 414                         i = SUCK_BE_U2(m->jcode + p + 1);
 415
 416                 pushconstantitem:
 417
 418 #if defined(ENABLE_VERIFIER)
 419                         if (i >= m->class->cpcount) {
 420                                 exceptions_throw_verifyerror(m,
 421                                         "Attempt to access constant outside range");
 422                                 return false;
 423                         }
 424 #endif
 425
 426                         switch (m->class->cptags[i]) {
 427                         case CONSTANT_Integer:
 428                                 OP_LOADCONST_I(((constant_integer *) (m->class->cpinfos[i]))->value);
 429                                 break;
 430                         case CONSTANT_Long:
 431                                 OP_LOADCONST_L(((constant_long *) (m->class->cpinfos[i]))->value);
 432                                 break;
 433                         case CONSTANT_Float:
 434                                 OP_LOADCONST_F(((constant_float *) (m->class->cpinfos[i]))->value);
 435                                 break;
 436                         case CONSTANT_Double:
 437                                 OP_LOADCONST_D(((constant_double *) (m->class->cpinfos[i]))->value);
 438                                 break;
 439                         case CONSTANT_String:
 440                                 OP_LOADCONST_STRING(literalstring_new((utf *) (m->class->cpinfos[i])));
 441                                 break;
 442                         case CONSTANT_Class:
 443                                 cr = (constant_classref *) (m->class->cpinfos[i]);
 444
 445                                 if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
 446                                         return false;
 447
 448                                 /* if not resolved, c == NULL */
 449
 450                                 OP_LOADCONST_CLASSINFO_OR_CLASSREF_CHECK(c, cr);
 451
 452                                 break;
 453
 454 #if defined(ENABLE_VERIFIER)
 455                         default:
 456                                 exceptions_throw_verifyerror(m,
 457                                                 "Invalid constant type to push");
 458                                 return false;
 459 #endif
 460                         }
 461                         break;
 462
 463                 case JAVA_ACONST_NULL:
 464                         OP_LOADCONST_NULL();
 465                         break;
 466
 467                 case JAVA_ICONST_M1:
 468                 case JAVA_ICONST_0:
 469                 case JAVA_ICONST_1:
 470                 case JAVA_ICONST_2:
 471                 case JAVA_ICONST_3:
 472                 case JAVA_ICONST_4:
 473                 case JAVA_ICONST_5:
 474                         OP_LOADCONST_I(opcode - JAVA_ICONST_0);
 475                         break;
 476
 477                 case JAVA_LCONST_0:
 478                 case JAVA_LCONST_1:
 479                         OP_LOADCONST_L(opcode - JAVA_LCONST_0);
 480                         break;
 481
 482                 case JAVA_FCONST_0:
 483                 case JAVA_FCONST_1:
 484                 case JAVA_FCONST_2:
 485                         OP_LOADCONST_F(opcode - JAVA_FCONST_0);
 486                         break;
 487
 488                 case JAVA_DCONST_0:
 489                 case JAVA_DCONST_1:
 490                         OP_LOADCONST_D(opcode - JAVA_DCONST_0);
 491                         break;
 492
 493                 /* local variable access instructions *********************************/
 494
 495                 case JAVA_ILOAD:
 496                 case JAVA_FLOAD:
 497                 case JAVA_ALOAD:
 498                         if (iswide == false) {
 499                                 i = SUCK_BE_U1(m->jcode + p + 1);
 500                         }
 501                         else {
 502                                 i = SUCK_BE_U2(m->jcode + p + 1);
 503                                 nextp = p + 3;
 504                                 iswide = false;
 505                         }
 506                         OP_LOAD_ONEWORD(opcode, i, opcode - JAVA_ILOAD);
 507                         break;
 508
 509                 case JAVA_LLOAD:
 510                 case JAVA_DLOAD:
 511                         if (iswide == false) {
 512                                 i = SUCK_BE_U1(m->jcode + p + 1);
 513                         }
 514                         else {
 515                                 i = SUCK_BE_U2(m->jcode + p + 1);
 516                                 nextp = p + 3;
 517                                 iswide = false;
 518                         }
 519                         OP_LOAD_TWOWORD(opcode, i, opcode - JAVA_ILOAD);
 520                         break;
 521
 522                 case JAVA_ILOAD_0:
 523                 case JAVA_ILOAD_1:
 524                 case JAVA_ILOAD_2:
 525                 case JAVA_ILOAD_3:
 526                         OP_LOAD_ONEWORD(ICMD_ILOAD, opcode - JAVA_ILOAD_0, TYPE_INT);
 527                         break;
 528
 529                 case JAVA_LLOAD_0:
 530                 case JAVA_LLOAD_1:
 531                 case JAVA_LLOAD_2:
 532                 case JAVA_LLOAD_3:
 533                         OP_LOAD_TWOWORD(ICMD_LLOAD, opcode - JAVA_LLOAD_0, TYPE_LNG);
 534                         break;
 535
 536                 case JAVA_FLOAD_0:
 537                 case JAVA_FLOAD_1:
 538                 case JAVA_FLOAD_2:
 539                 case JAVA_FLOAD_3:
 540                         OP_LOAD_ONEWORD(ICMD_FLOAD, opcode - JAVA_FLOAD_0, TYPE_FLT);
 541                         break;
 542
 543                 case JAVA_DLOAD_0:
 544                 case JAVA_DLOAD_1:
 545                 case JAVA_DLOAD_2:
 546                 case JAVA_DLOAD_3:
 547                         OP_LOAD_TWOWORD(ICMD_DLOAD, opcode - JAVA_DLOAD_0, TYPE_DBL);
 548                         break;
 549
 550                 case JAVA_ALOAD_0:
 551                 case JAVA_ALOAD_1:
 552                 case JAVA_ALOAD_2:
 553                 case JAVA_ALOAD_3:
 554                         OP_LOAD_ONEWORD(ICMD_ALOAD, opcode - JAVA_ALOAD_0, TYPE_ADR);
 555                         break;
 556
 557                 case JAVA_ISTORE:
 558                 case JAVA_FSTORE:
 559                 case JAVA_ASTORE:
 560                         if (iswide == false) {
 561                                 i = SUCK_BE_U1(m->jcode + p + 1);
 562                         }
 563                         else {
 564                                 i = SUCK_BE_U2(m->jcode + p + 1);
 565                                 iswide = false;
 566                                 nextp = p + 3;
 567                         }
 568                         OP_STORE_ONEWORD(opcode, i, opcode - JAVA_ISTORE);
 569                         break;
 570
 571                 case JAVA_LSTORE:
 572                 case JAVA_DSTORE:
 573                         if (iswide == false) {
 574                                 i = SUCK_BE_U1(m->jcode + p + 1);
 575                         }
 576                         else {
 577                                 i = SUCK_BE_U2(m->jcode + p + 1);
 578                                 iswide = false;
 579                                 nextp = p + 3;
 580                         }
 581                         OP_STORE_TWOWORD(opcode, i, opcode - JAVA_ISTORE);
 582                         break;
 583
 584                 case JAVA_ISTORE_0:
 585                 case JAVA_ISTORE_1:
 586                 case JAVA_ISTORE_2:
 587                 case JAVA_ISTORE_3:
 588                         OP_STORE_ONEWORD(ICMD_ISTORE, opcode - JAVA_ISTORE_0, TYPE_INT);
 589                         break;
 590
 591                 case JAVA_LSTORE_0:
 592                 case JAVA_LSTORE_1:
 593                 case JAVA_LSTORE_2:
 594                 case JAVA_LSTORE_3:
 595                         OP_STORE_TWOWORD(ICMD_LSTORE, opcode - JAVA_LSTORE_0, TYPE_LNG);
 596                         break;
 597
 598                 case JAVA_FSTORE_0:
 599                 case JAVA_FSTORE_1:
 600                 case JAVA_FSTORE_2:
 601                 case JAVA_FSTORE_3:
 602                         OP_STORE_ONEWORD(ICMD_FSTORE, opcode - JAVA_FSTORE_0, TYPE_FLT);
 603                         break;
 604
 605                 case JAVA_DSTORE_0:
 606                 case JAVA_DSTORE_1:
 607                 case JAVA_DSTORE_2:
 608                 case JAVA_DSTORE_3:
 609                         OP_STORE_TWOWORD(ICMD_DSTORE, opcode - JAVA_DSTORE_0, TYPE_DBL);
 610                         break;
 611
 612                 case JAVA_ASTORE_0:
 613                 case JAVA_ASTORE_1:
 614                 case JAVA_ASTORE_2:
 615                 case JAVA_ASTORE_3:
 616                         OP_STORE_ONEWORD(ICMD_ASTORE, opcode - JAVA_ASTORE_0, TYPE_ADR);
 617                         break;
 618
 619                 case JAVA_IINC:
 620                         {
 621                                 int v;
 622
 623                                 if (iswide == false) {
 624                                         i = SUCK_BE_U1(m->jcode + p + 1);
 625                                         v = SUCK_BE_S1(m->jcode + p + 2);
 626
 627                                 }
 628                                 else {
 629                                         i = SUCK_BE_U2(m->jcode + p + 1);
 630                                         v = SUCK_BE_S2(m->jcode + p + 3);
 631                                         iswide = false;
 632                                         nextp = p + 5;
 633                                 }
 634                                 INDEX_ONEWORD(i);
 635                                 LOCALTYPE_USED(i, TYPE_INT);
 636                                 OP_LOCALINDEX_I(opcode, i, v);
 637                         }
 638                         break;
 639
 640                 /* wider index for loading, storing and incrementing ******************/
 641
 642                 case JAVA_WIDE:
 643                         iswide = true;
 644                         p++;
 645                         goto fetch_opcode;
 646
 647                 /* managing arrays ****************************************************/
 648
 649                 case JAVA_NEWARRAY:
 650                         switch (SUCK_BE_S1(m->jcode + p + 1)) {
 651                         case 4:
 652                                 bte = builtintable_get_internal(BUILTIN_newarray_boolean);
 653                                 break;
 654                         case 5:
 655                                 bte = builtintable_get_internal(BUILTIN_newarray_char);
 656                                 break;
 657                         case 6:
 658                                 bte = builtintable_get_internal(BUILTIN_newarray_float);
 659                                 break;
 660                         case 7:
 661                                 bte = builtintable_get_internal(BUILTIN_newarray_double);
 662                                 break;
 663                         case 8:
 664                                 bte = builtintable_get_internal(BUILTIN_newarray_byte);
 665                                 break;
 666                         case 9:
 667                                 bte = builtintable_get_internal(BUILTIN_newarray_short);
 668                                 break;
 669                         case 10:
 670                                 bte = builtintable_get_internal(BUILTIN_newarray_int);
 671                                 break;
 672                         case 11:
 673                                 bte = builtintable_get_internal(BUILTIN_newarray_long);
 674                                 break;
 675 #if defined(ENABLE_VERIFIER)
 676                         default:
 677                                 exceptions_throw_verifyerror(m, "Invalid array-type to create");
 678                                 return false;
 679 #endif
 680                         }
 681                         OP_BUILTIN_CHECK_EXCEPTION(bte);
 682                         break;
 683
 684                 case JAVA_ANEWARRAY:
 685                         i = SUCK_BE_U2(m->jcode + p + 1);
 686                         compr = (constant_classref *) class_getconstant(m->class, i, CONSTANT_Class);
 687                         if (!compr)
 688                                 return false;
 689
 690                         if (!(cr = class_get_classref_multiarray_of(1, compr)))
 691                                 return false;
 692
 693                         if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
 694                                 return false;
 695
 696                         INSTRUCTIONS_CHECK(2);
 697                         OP_LOADCONST_CLASSINFO_OR_CLASSREF_NOCHECK(c, cr);
 698                         bte = builtintable_get_internal(BUILTIN_newarray);
 699                         OP_BUILTIN_CHECK_EXCEPTION(bte);
 700                         s_count++;
 701                         break;
 702
 703                 case JAVA_MULTIANEWARRAY:
 704                         jd->isleafmethod = false;
 705                         i = SUCK_BE_U2(m->jcode + p + 1);
 706                         j = SUCK_BE_U1(m->jcode + p + 3);
 707
 708                         cr = (constant_classref *) class_getconstant(m->class, i, CONSTANT_Class);
 709                         if (cr == NULL)
 710                                 return false;
 711
 712                         if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
 713                                 return false;
 714
 715                         /* if unresolved, c == NULL */
 716
 717                         iptr->s1.argcount = j;
 718                         OP_S3_CLASSINFO_OR_CLASSREF(opcode, c, cr, 0 /* flags */);
 719                         break;
 720
 721                 /* control flow instructions ******************************************/
 722
 723                 case JAVA_IFEQ:
 724                 case JAVA_IFLT:
 725                 case JAVA_IFLE:
 726                 case JAVA_IFNE:
 727                 case JAVA_IFGT:
 728                 case JAVA_IFGE:
 729                 case JAVA_IFNULL:
 730                 case JAVA_IFNONNULL:
 731                 case JAVA_IF_ICMPEQ:
 732                 case JAVA_IF_ICMPNE:
 733                 case JAVA_IF_ICMPLT:
 734                 case JAVA_IF_ICMPGT:
 735                 case JAVA_IF_ICMPLE:
 736                 case JAVA_IF_ICMPGE:
 737                 case JAVA_IF_ACMPEQ:
 738                 case JAVA_IF_ACMPNE:
 739                 case JAVA_GOTO:
 740                         i = p + SUCK_BE_S2(m->jcode + p + 1);
 741                         CHECK_BYTECODE_INDEX(i);
 742                         MARK_BASICBLOCK(i);
 743                         blockend = true;
 744                         OP_INSINDEX(opcode, i);
 745                         break;
 746
 747                 case JAVA_GOTO_W:
 748                         i = p + SUCK_BE_S4(m->jcode + p + 1);
 749                         CHECK_BYTECODE_INDEX(i);
 750                         MARK_BASICBLOCK(i);
 751                         blockend = true;
 752                         OP_INSINDEX(opcode, i);
 753                         break;
 754
 755                 case JAVA_JSR:
 756                         i = p + SUCK_BE_S2(m->jcode + p + 1);
 757 jsr_tail:
 758                         CHECK_BYTECODE_INDEX(i);
 759                         MARK_BASICBLOCK(i);
 760                         blockend = true;
 761                         OP_PREPARE_ZEROFLAGS(JAVA_JSR);
 762                         iptr->sx.s23.s3.jsrtarget.insindex = i;
 763                         PINC;
 764                         break;
 765
 766                 case JAVA_JSR_W:
 767                         i = p + SUCK_BE_S4(m->jcode + p + 1);
 768                         goto jsr_tail;
 769
 770                 case JAVA_RET:
 771                         if (iswide == false) {
 772                                 i = SUCK_BE_U1(m->jcode + p + 1);
 773                         }
 774                         else {
 775                                 i = SUCK_BE_U2(m->jcode + p + 1);
 776                                 nextp = p + 3;
 777                                 iswide = false;
 778                         }
 779                         blockend = true;
 780
 781                         OP_LOAD_ONEWORD(opcode, i, TYPE_ADR);
 782                         break;
 783
 784                 case JAVA_IRETURN:
 785                 case JAVA_LRETURN:
 786                 case JAVA_FRETURN:
 787                 case JAVA_DRETURN:
 788                 case JAVA_ARETURN:
 789                 case JAVA_RETURN:
 790                         blockend = true;
 791                         /* XXX ARETURN will need a flag in the typechecker */
 792                         OP(opcode);
 793                         break;
 794
 795                 case JAVA_ATHROW:
 796                         blockend = true;
 797                         /* XXX ATHROW will need a flag in the typechecker */
 798                         OP(opcode);
 799                         break;
 800
 801
 802                 /* table jumps ********************************************************/
 803
 804                 case JAVA_LOOKUPSWITCH:
 805                         {
 806                                 s4 num, j;
 807                                 lookup_target_t *lookup;
 808 #if defined(ENABLE_VERIFIER)
 809                                 s4 prevvalue = 0;
 810 #endif
 811                                 blockend = true;
 812                                 nextp = ALIGN((p + 1), 4);
 813
 814                                 CHECK_END_OF_BYTECODE(nextp + 8);
 815
 816                                 OP_PREPARE_ZEROFLAGS(opcode);
 817
 818                                 /* default target */
 819
 820                                 j = p + SUCK_BE_S4(m->jcode + nextp);
 821                                 iptr->sx.s23.s3.lookupdefault.insindex = j;
 822                                 nextp += 4;
 823                                 CHECK_BYTECODE_INDEX(j);
 824                                 MARK_BASICBLOCK(j);
 825
 826                                 /* number of pairs */
 827
 828                                 num = SUCK_BE_U4(m->jcode + nextp);
 829                                 iptr->sx.s23.s2.lookupcount = num;
 830                                 nextp += 4;
 831
 832                                 /* allocate the intermediate code table */
 833
 834                                 lookup = DMNEW(lookup_target_t, num);
 835                                 iptr->dst.lookup = lookup;
 836
 837                                 /* iterate over the lookup table */
 838
 839                                 CHECK_END_OF_BYTECODE(nextp + 8 * num);
 840
 841                                 for (i = 0; i < num; i++) {
 842                                         /* value */
 843
 844                                         j = SUCK_BE_S4(m->jcode + nextp);
 845                                         lookup->value = j;
 846
 847                                         nextp += 4;
 848
 849 #if defined(ENABLE_VERIFIER)
 850                                         /* check if the lookup table is sorted correctly */
 851
 852                                         if (i && (j <= prevvalue)) {
 853                                                 exceptions_throw_verifyerror(m, "Unsorted lookup switch");
 854                                                 return false;
 855                                         }
 856                                         prevvalue = j;
 857 #endif
 858                                         /* target */
 859
 860                                         j = p + SUCK_BE_S4(m->jcode + nextp);
 861                                         lookup->target.insindex = j;
 862                                         lookup++;
 863                                         nextp += 4;
 864                                         CHECK_BYTECODE_INDEX(j);
 865                                         MARK_BASICBLOCK(j);
 866                                 }
 867
 868                                 PINC;
 869                                 break;
 870                         }
 871
 872
 873                 case JAVA_TABLESWITCH:
 874                         {
 875                                 s4 num, j;
 876                                 s4 deftarget;
 877                                 branch_target_t *table;
 878
 879                                 blockend = true;
 880                                 nextp = ALIGN((p + 1), 4);
 881
 882                                 CHECK_END_OF_BYTECODE(nextp + 12);
 883
 884                                 OP_PREPARE_ZEROFLAGS(opcode);
 885
 886                                 /* default target */
 887
 888                                 deftarget = p + SUCK_BE_S4(m->jcode + nextp);
 889                                 nextp += 4;
 890                                 CHECK_BYTECODE_INDEX(deftarget);
 891                                 MARK_BASICBLOCK(deftarget);
 892
 893                                 /* lower bound */
 894
 895                                 j = SUCK_BE_S4(m->jcode + nextp);
 896                                 iptr->sx.s23.s2.tablelow = j;
 897                                 nextp += 4;
 898
 899                                 /* upper bound */
 900
 901                                 num = SUCK_BE_S4(m->jcode + nextp);
 902                                 iptr->sx.s23.s3.tablehigh = num;
 903                                 nextp += 4;
 904
 905                                 /* calculate the number of table entries */
 906
 907                                 num = num - j + 1;
 908
 909 #if defined(ENABLE_VERIFIER)
 910                                 if (num < 1) {
 911                                         exceptions_throw_verifyerror(m,
 912                                                         "invalid TABLESWITCH: upper bound < lower bound");
 913                                         return false;
 914                                 }
 915 #endif
 916                                 /* create the intermediate code table */
 917                                 /* the first entry is the default target */
 918
 919                                 table = MNEW(branch_target_t, 1 + num);
 920                                 iptr->dst.table = table;
 921                                 (table++)->insindex = deftarget;
 922
 923                                 /* iterate over the target table */
 924
 925                                 CHECK_END_OF_BYTECODE(nextp + 4 * num);
 926
 927                                 for (i = 0; i < num; i++) {
 928                                         j = p + SUCK_BE_S4(m->jcode + nextp);
 929                                         (table++)->insindex = j;
 930                                         nextp += 4;
 931                                         CHECK_BYTECODE_INDEX(j);
 932                                         MARK_BASICBLOCK(j);
 933                                 }
 934
 935                                 PINC;
 936                                 break;
 937                         }
 938
 939
 940                 /* load and store of object fields ************************************/
 941
 942                 case JAVA_AASTORE:
 943                         OP(opcode);
 944                         jd->isleafmethod = false;
 945                         break;
 946
 947                 case JAVA_GETSTATIC:
 948                 case JAVA_PUTSTATIC:
 949                 case JAVA_GETFIELD:
 950                 case JAVA_PUTFIELD:
 951                         {
 952                                 constant_FMIref  *fr;
 953                                 unresolved_field *uf;
 954
 955                                 i = SUCK_BE_U2(m->jcode + p + 1);
 956                                 fr = class_getconstant(m->class, i, CONSTANT_Fieldref);
 957                                 if (!fr)
 958                                         return false;
 959
 960                                 OP_PREPARE_ZEROFLAGS(opcode);
 961                                 iptr->sx.s23.s3.fmiref = fr;
 962
 963                                 /* only with -noverify, otherwise the typechecker does this */
 964
 965 #if defined(ENABLE_VERIFIER)
 966                                 if (!JITDATA_HAS_FLAG_VERIFY(jd)) {
 967 #endif
 968                                         result = new_resolve_field_lazy(iptr, m);
 969                                         if (result == resolveFailed)
 970                                                 return false;
 971
 972                                         if (result != resolveSucceeded) {
 973                                                 uf = new_create_unresolved_field(m->class, m, iptr);
 974
 975                                                 if (uf == NULL)
 976                                                         return false;
 977
 978                                                 /* store the unresolved_field pointer */
 979
 980                                                 iptr->sx.s23.s3.uf = uf;
 981                                                 iptr->flags.bits = INS_FLAG_UNRESOLVED;
 982                                         }
 983 #if defined(ENABLE_VERIFIER)
 984                                 }
 985 #endif
 986                                 PINC;
 987                         }
 988                         break;
 989
 990
 991                 /* method invocation **************************************************/
 992
 993                 case JAVA_INVOKESTATIC:
 994                         i = SUCK_BE_U2(m->jcode + p + 1);
 995                         mr = class_getconstant(m->class, i, CONSTANT_Methodref);
 996
 997                         if (mr == NULL)
 998                                 return false;
 999
1000                         md = mr->parseddesc.md;
1001
1002                         if (md->params == NULL)
1003                                 if (!descriptor_params_from_paramtypes(md, ACC_STATIC))
1004                                         return false;
1005
1006                         goto invoke_method;
1007
1008                 case JAVA_INVOKEINTERFACE:
1009                         i = SUCK_BE_U2(m->jcode + p + 1);
1010
1011                         mr = class_getconstant(m->class, i, CONSTANT_InterfaceMethodref);
1012
1013                         goto invoke_nonstatic_method;
1014
1015                 case JAVA_INVOKESPECIAL:
1016                 case JAVA_INVOKEVIRTUAL:
1017                         i = SUCK_BE_U2(m->jcode + p + 1);
1018                         mr = class_getconstant(m->class, i, CONSTANT_Methodref);
1019
1020 invoke_nonstatic_method:
1021                         if (mr == NULL)
1022                                 return false;
1023
1024                         md = mr->parseddesc.md;
1025
1026                         if (md->params == NULL)
1027                                 if (!descriptor_params_from_paramtypes(md, 0))
1028                                         return false;
1029
1030 invoke_method:
1031                         jd->isleafmethod = false;
1032
1033                         OP_PREPARE_ZEROFLAGS(opcode);
1034                         iptr->sx.s23.s3.fmiref = mr;
1035
1036                         /* only with -noverify, otherwise the typechecker does this */
1037
1038 #if defined(ENABLE_VERIFIER)
1039                         if (!JITDATA_HAS_FLAG_VERIFY(jd)) {
1040 #endif
1041                                 result = new_resolve_method_lazy(iptr, m);
1042                                 if (result == resolveFailed)
1043                                         return false;
1044
1045                                 if (result != resolveSucceeded) {
1046                                         um = new_create_unresolved_method(m->class, m, iptr);
1047
1048                                         if (!um)
1049                                                 return false;
1050
1051                                         /* store the unresolved_method pointer */
1052
1053                                         iptr->sx.s23.s3.um = um;
1054                                         iptr->flags.bits = INS_FLAG_UNRESOLVED;
1055                                 }
1056 #if defined(ENABLE_VERIFIER)
1057                         }
1058 #endif
1059                         PINC;
1060                         break;
1061
1062                 /* instructions taking class arguments ********************************/
1063
1064                 case JAVA_NEW:
1065                         i = SUCK_BE_U2(m->jcode + p + 1);
1066                         cr = (constant_classref *) class_getconstant(m->class, i, CONSTANT_Class);
1067                         if (!cr)
1068                                 return false;
1069
1070                         if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
1071                                 return false;
1072
1073                         INSTRUCTIONS_CHECK(2);
1074                         OP_LOADCONST_CLASSINFO_OR_CLASSREF_NOCHECK(c, cr);
1075                         bte = builtintable_get_internal(BUILTIN_new);
1076                         OP_BUILTIN_CHECK_EXCEPTION(bte);
1077                         s_count++;
1078                         break;
1079
1080                 case JAVA_CHECKCAST:
1081                         i = SUCK_BE_U2(m->jcode + p + 1);
1082                         cr = (constant_classref *) class_getconstant(m->class, i, CONSTANT_Class);
1083                         if (cr == NULL)
1084                                 return false;
1085
1086                         if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
1087                                 return false;
1088
1089                         if (cr->name->text[0] == '[') {
1090                                 /* array type cast-check */
1091                                 flags = INS_FLAG_ARRAY;
1092                                 jd->isleafmethod = false;
1093                         }
1094                         else {
1095                                 /* object type cast-check */
1096                                 flags = 0;
1097                         }
1098                         OP_S3_CLASSINFO_OR_CLASSREF(opcode, c, cr, flags);
1099                         break;
1100
1101                 case JAVA_INSTANCEOF:
1102                         i = SUCK_BE_U2(m->jcode + p + 1);
1103                         cr = (constant_classref *) class_getconstant(m->class, i, CONSTANT_Class);
1104                         if (cr == NULL)
1105                                 return false;
1106
1107                         if (!resolve_classref(m, cr, resolveLazy, true, true, &c))
1108                                 return false;
1109
1110                         if (cr->name->text[0] == '[') {
1111                                 /* array type cast-check */
1112                                 INSTRUCTIONS_CHECK(2);
1113                                 OP_LOADCONST_CLASSINFO_OR_CLASSREF_NOCHECK(c, cr);
1114                                 bte = builtintable_get_internal(BUILTIN_arrayinstanceof);
1115                                 OP_BUILTIN_NO_EXCEPTION(bte);
1116                                 s_count++;
1117                         }
1118                         else {
1119                                 /* object type cast-check */
1120                                 OP_S3_CLASSINFO_OR_CLASSREF(opcode, c, cr, 0 /* flags*/);
1121                         }
1122                         break;
1123
1124                 /* synchronization instructions ***************************************/
1125
1126                 case JAVA_MONITORENTER:
1127 #if defined(ENABLE_THREADS)
1128                         if (checksync) {
1129                                 bte = builtintable_get_internal(LOCK_monitor_enter);
1130                                 OP_BUILTIN_CHECK_EXCEPTION(bte);
1131                         }
1132                         else
1133 #endif
1134                         {
1135                                 OP(ICMD_CHECKNULL_POP);
1136                         }
1137                         break;
1138
1139                 case JAVA_MONITOREXIT:
1140 #if defined(ENABLE_THREADS)
1141                         if (checksync) {
1142                                 bte = builtintable_get_internal(LOCK_monitor_exit);
1143                                 OP_BUILTIN_CHECK_EXCEPTION(bte);
1144                         }
1145                         else
1146 #endif
1147                         {
1148                                 OP(ICMD_CHECKNULL_POP);
1149                         }
1150                         break;
1151
1152                 /* arithmetic instructions that may become builtin functions **********/
1153
1154                 case JAVA_IDIV:
1155 #if !SUPPORT_DIVISION
1156                         bte = builtintable_get_internal(BUILTIN_idiv);
1157                         OP_BUILTIN_ARITHMETIC(opcode, bte);
1158 #else
1159                         OP(opcode);
1160 #endif
1161                         break;
1162
1163                 case JAVA_IREM:
1164 #if !SUPPORT_DIVISION
1165                         bte = builtintable_get_internal(BUILTIN_irem);
1166                         OP_BUILTIN_ARITHMETIC(opcode, bte);
1167 #else
1168                         OP(opcode);
1169 #endif
1170                         break;
1171
1172                 case JAVA_LDIV:
1173 #if !(SUPPORT_DIVISION && SUPPORT_LONG && SUPPORT_LONG_DIV)
1174                         bte = builtintable_get_internal(BUILTIN_ldiv);
1175                         OP_BUILTIN_ARITHMETIC(opcode, bte);
1176 #else
1177                         OP(opcode);
1178 #endif
1179                         break;
1180
1181                 case JAVA_LREM:
1182 #if !(SUPPORT_DIVISION && SUPPORT_LONG && SUPPORT_LONG_DIV)
1183                         bte = builtintable_get_internal(BUILTIN_lrem);
1184                         OP_BUILTIN_ARITHMETIC(opcode, bte);
1185 #else
1186                         OP(opcode);
1187 #endif
1188                         break;
1189
1190                 case JAVA_FREM:
1191 #if defined(__I386__)
1192                         OP(opcode);
1193 #else
1194                         bte = builtintable_get_internal(BUILTIN_frem);
1195                         OP_BUILTIN_NO_EXCEPTION(bte);
1196 #endif
1197                         break;
1198
1199                 case JAVA_DREM:
1200 #if defined(__I386__)
1201                         OP(opcode);
1202 #else
1203                         bte = builtintable_get_internal(BUILTIN_drem);
1204                         OP_BUILTIN_NO_EXCEPTION(bte);
1205 #endif
1206                         break;
1207
1208                 case JAVA_F2I:
1209 #if defined(__ALPHA__)
1210                         if (!opt_noieee) {
1211                                 bte = builtintable_get_internal(BUILTIN_f2i);
1212                                 OP_BUILTIN_NO_EXCEPTION(bte);
1213                         }
1214                         else
1215 #endif
1216                         {
1217                                 OP(opcode);
1218                         }
1219                         break;
1220
1221                 case JAVA_F2L:
1222 #if defined(__ALPHA__)
1223                         if (!opt_noieee) {
1224                                 bte = builtintable_get_internal(BUILTIN_f2l);
1225                                 OP_BUILTIN_NO_EXCEPTION(bte);
1226                         }
1227                         else
1228 #endif
1229                         {
1230                                 OP(opcode);
1231                         }
1232                         break;
1233
1234                 case JAVA_D2I:
1235 #if defined(__ALPHA__)
1236                         if (!opt_noieee) {
1237                                 bte = builtintable_get_internal(BUILTIN_d2i);
1238                                 OP_BUILTIN_NO_EXCEPTION(bte);
1239                         }
1240                         else
1241 #endif
1242                         {
1243                                 OP(opcode);
1244                         }
1245                         break;
1246
1247                 case JAVA_D2L:
1248 #if defined(__ALPHA__)
1249                         if (!opt_noieee) {
1250                                 bte = builtintable_get_internal(BUILTIN_d2l);
1251                                 OP_BUILTIN_NO_EXCEPTION(bte);
1252                         }
1253                         else
1254 #endif
1255                         {
1256                                 OP(opcode);
1257                         }
1258                         break;
1259
1260                 /* invalid opcodes ****************************************************/
1261
1262                         /* check for invalid opcodes if the verifier is enabled */
1263 #if defined(ENABLE_VERIFIER)
1264                 case JAVA_BREAKPOINT:
1265                         exceptions_throw_verifyerror(m, "Quick instructions shouldn't appear, yet.");
1266                         return false;
1267
1268                 case 186: /* unused opcode */
1269                 case 203:
1270                 case 204:
1271                 case 205:
1272                 case 206:
1273                 case 207:
1274                 case 208:
1275                 case 209:
1276                 case 210:
1277                 case 211:
1278                 case 212:
1279                 case 213:
1280                 case 214:
1281                 case 215:
1282                 case 216:
1283                 case 217:
1284                 case 218:
1285                 case 219:
1286                 case 220:
1287                 case 221:
1288                 case 222:
1289                 case 223:
1290                 case 224:
1291                 case 225:
1292                 case 226:
1293                 case 227:
1294                 case 228:
1295                 case 229:
1296                 case 230:
1297                 case 231:
1298                 case 232:
1299                 case 233:
1300                 case 234:
1301                 case 235:
1302                 case 236:
1303                 case 237:
1304                 case 238:
1305                 case 239:
1306                 case 240:
1307                 case 241:
1308                 case 242:
1309                 case 243:
1310                 case 244:
1311                 case 245:
1312                 case 246:
1313                 case 247:
1314                 case 248:
1315                 case 249:
1316                 case 250:
1317                 case 251:
1318                 case 252:
1319                 case 253:
1320                 case 254:
1321                 case 255:
1322                         exceptions_throw_verifyerror(m, "Illegal opcode %d at instr %d\n",
1323                                                                                  opcode, ipc);
1324                         return false;
1325                         break;
1326 #endif /* defined(ENABLE_VERIFIER) */
1327
1328                 /* opcodes that don't require translation *****************************/
1329
1330                 default:
1331                         /* straight-forward translation to ICMD */
1332                         OP(opcode);
1333                         break;
1334
1335                 } /* end switch */
1336
1337                 /* verifier checks ****************************************************/
1338
1339 #if defined(ENABLE_VERIFIER)
1340                 /* If WIDE was used correctly, iswide should have been reset by now. */
1341                 if (iswide) {
1342                         exceptions_throw_verifyerror(m,
1343                                         "Illegal instruction: WIDE before incompatible opcode");
1344                         return false;
1345                 }
1346 #endif /* defined(ENABLE_VERIFIER) */
1347
1348         } /* end for */
1349
1350         /* add a NOP to the last basic block */
1351
1352         INSTRUCTIONS_CHECK(1);
1353         OP(ICMD_NOP);
1354
1355         /*** END OF LOOP **********************************************************/
1356
1357         /* assert that we did not write more ICMDs than allocated */
1358
1359         assert(ipc <= pd.instructionslength);
1360         assert(ipc == (iptr - pd.instructions));
1361
1362         /*** verifier checks ******************************************************/
1363
1364 #if defined(ENABLE_VERIFIER)
1365         if (p != m->jcodelength) {
1366                 exceptions_throw_verifyerror(m,
1367                                 "Command-sequence crosses code-boundary");
1368                 return false;
1369         }
1370
1371         if (!blockend) {
1372                 exceptions_throw_verifyerror(m, "Falling off the end of the code");
1373                 return false;
1374         }
1375 #endif /* defined(ENABLE_VERIFIER) */
1376
1377         /*** setup the methodinfo, allocate stack and basic blocks ****************/
1378
1379         /* adjust block count if target 0 is not first intermediate instruction */
1380
1381         if (!jd->new_basicblockindex[0] || (jd->new_basicblockindex[0] > 1))
1382                 b_count++;
1383
1384         /* copy local to method variables */
1385
1386         jd->new_instructions = pd.instructions;
1387         jd->new_instructioncount = ipc;
1388         jd->new_basicblockcount = b_count;
1389         jd->new_stackcount = s_count + jd->new_basicblockcount * m->maxstack; /* in-stacks */
1390
1391         /* allocate stack table */
1392
1393         jd->new_stack = DMNEW(stackelement, jd->new_stackcount);
1394
1395         /* build basic block list */
1396
1397         bptr = jd->new_basicblocks = DMNEW(basicblock, b_count + 1);    /* one more for end ipc */
1398
1399         /* zero out all basic block structures */
1400
1401         MZERO(bptr, basicblock, b_count + 1);
1402
1403         b_count = 0;
1404         jd->new_c_debug_nr = 0;
1405
1406         /* additional block if target 0 is not first intermediate instruction */
1407
1408         if (!jd->new_basicblockindex[0] || (jd->new_basicblockindex[0] > 1)) {
1409                 BASICBLOCK_INIT(bptr, m);
1410
1411                 bptr->iinstr = jd->new_instructions;
1412                 /* bptr->icount is set when the next block is allocated */
1413
1414                 bptr++;
1415                 b_count++;
1416                 bptr[-1].next = bptr;
1417         }
1418
1419         /* allocate blocks */
1420
1421         for (p = 0; p < m->jcodelength; p++) {
1422                 if (jd->new_basicblockindex[p] & 1) {
1423 #if defined(ENABLE_VERIFIER)
1424                         /* Check if this block starts at the beginning of an
1425                            instruction. */
1426
1427                         if (!pd.instructionstart[p]) {
1428                                 exceptions_throw_verifyerror(m,
1429                                                 "Branch into middle of instruction");
1430                                 return false;
1431                         }
1432 #endif
1433
1434                         /* allocate the block */
1435
1436                         BASICBLOCK_INIT(bptr, m);
1437
1438                         bptr->iinstr = jd->new_instructions + (jd->new_basicblockindex[p] >> 1);
1439                         if (b_count) {
1440                                 bptr[-1].icount = bptr->iinstr - bptr[-1].iinstr;
1441                         }
1442                         /* bptr->icount is set when the next block is allocated */
1443
1444                         jd->new_basicblockindex[p] = b_count;
1445
1446                         bptr++;
1447                         b_count++;
1448                         bptr[-1].next = bptr;
1449                 }
1450         }
1451
1452         /* set instruction count of last real block */
1453
1454         if (b_count) {
1455                 bptr[-1].icount = (jd->new_instructions + jd->new_instructioncount) - bptr[-1].iinstr;
1456         }
1457
1458         /* allocate additional block at end */
1459
1460         BASICBLOCK_INIT(bptr,m);
1461
1462         /* set basicblock pointers in exception table */
1463
1464         if (cd->exceptiontablelength > 0) {
1465                 cd->exceptiontable[cd->exceptiontablelength - 1].down = NULL;
1466         }
1467
1468         for (i = 0; i < cd->exceptiontablelength; ++i) {
1469                 p = cd->exceptiontable[i].startpc;
1470                 cd->exceptiontable[i].start = jd->new_basicblocks + jd->new_basicblockindex[p];
1471
1472                 p = cd->exceptiontable[i].endpc;
1473                 cd->exceptiontable[i].end = (p == m->jcodelength) ? (jd->new_basicblocks + jd->new_basicblockcount /*+ 1*/) : (jd->new_basicblocks + jd->new_basicblockindex[p]);
1474
1475                 p = cd->exceptiontable[i].handlerpc;
1476                 cd->exceptiontable[i].handler = jd->new_basicblocks + jd->new_basicblockindex[p];
1477         }
1478
1479         /* XXX activate this if you want to try inlining */
1480 #if 0
1481         for (i = 0; i < m->exceptiontablelength; ++i) {
1482                 p = m->exceptiontable[i].startpc;
1483                 m->exceptiontable[i].start = jd->new_basicblocks + jd->new_basicblockindex[p];
1484
1485                 p = m->exceptiontable[i].endpc;
1486                 m->exceptiontable[i].end = (p == m->jcodelength) ? (jd->new_basicblocks + jd->new_basicblockcount /*+ 1*/) : (jd->new_basicblocks + jd->new_basicblockindex[p]);
1487
1488                 p = m->exceptiontable[i].handlerpc;
1489                 m->exceptiontable[i].handler = jd->new_basicblocks + jd->new_basicblockindex[p];
1490         }
1491 #endif
1492
1493 #if defined(NEW_VAR)
1494         jd->local_map = local_map;
1495
1496         /* calculate local variable renaming */
1497
1498         {
1499                 s4 nlocals = 0;
1500                 s4 i;
1501
1502                 s4 *mapptr;
1503
1504                 mapptr = local_map;
1505
1506                 /* iterate over local_map[0..m->maxlocals*5] and set all existing  */
1507                 /* index,type pairs (localmap[index*5+type]==1) to an unique value */
1508                 /* -> == new local var index */
1509                 for(i = 0; i < (m->maxlocals * 5); i++, mapptr++) {
1510                         if (*mapptr)
1511                                 *mapptr = nlocals++;
1512                         else
1513                                 *mapptr = LOCAL_UNUSED;
1514                 }
1515
1516                 jd->localcount = nlocals;
1517                 /* if dropped varindices for temp stackslots get reused(?max 2*       */
1518                 /* m->maxstack elements for stack), nlocals + s_count would be        */
1519                 /* sufficient */
1520                 jd->varcount   = nlocals + s_count +
1521                         jd->new_basicblockcount * m->maxstack;        /* out-stacks */
1522
1523                 jd->var_top = nlocals;
1524                 jd->var = DMNEW(varinfo, jd->varcount);
1525         }
1526 #endif
1527
1528         /* everything's ok */
1529
1530         return true;
1531
1532         /*** goto labels for throwing verifier exceptions *************************/
1533
1534 #if defined(ENABLE_VERIFIER)
1535
1536 throw_unexpected_end_of_bytecode:
1537         exceptions_throw_verifyerror(m, "Unexpected end of bytecode");
1538         return false;
1539
1540 throw_invalid_bytecode_index:
1541         exceptions_throw_verifyerror(m, "Illegal target of branch instruction");
1542         return false;
1543
1544 throw_illegal_local_variable_number:
1545         exceptions_throw_verifyerror(m, "Illegal local variable number");
1546         return false;
1547
1548 #endif /* ENABLE_VERIFIER */
1549 }
1550
1551
1552 /*
1553  * These are local overrides for various environment variables in Emacs.
1554  * Please do not remove this and leave it at the end of the file, where
1555  * Emacs will automagically detect them.
1556  * ---------------------------------------------------------------------
1557  * Local variables:
1558  * mode: c
1559  * indent-tabs-mode: t
1560  * c-basic-offset: 4
1561  * tab-width: 4
1562  * End:
1563  * vim:noexpandtab:sw=4:ts=4:
1564  */