src/vm/jit/stack.c

   1 /* src/vm/jit/stack.c - stack analysis
   2
   3    Copyright (C) 1996-2005, 2006, 2007 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 */
  26
  27
  28 #include "config.h"
  29
  30 #include <assert.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33 #include <limits.h>
  34
  35 #include "arch.h"
  36 #include "md-abi.h"
  37
  38 #include "mm/memory.h"
  39
  40 #include "native/native.h"
  41
  42 #include "toolbox/logging.h"
  43
  44 #include "vm/global.h"
  45 #include "vm/builtin.h"
  46 #include "vm/stringlocal.h"
  47 #include "vm/types.h"
  48
  49 #include "vm/jit/abi.h"
  50 #include "vm/jit/cfg.h"
  51 #include "vm/jit/codegen-common.h"
  52 #include "vm/jit/parse.h"
  53 #include "vm/jit/show.h"
  54
  55 #if defined(ENABLE_DISASSEMBLER)
  56 # include "vm/jit/disass.h"
  57 #endif
  58
  59 #include "vm/jit/jit.h"
  60 #include "vm/jit/stack.h"
  61
  62 #if 0
  63 #if defined(ENABLE_SSA)
  64 # include "vm/jit/optimizing/lsra.h"
  65 # include "vm/jit/optimizing/ssa.h"
  66 #elif defined(ENABLE_LSRA)
  67 # include "vm/jit/allocator/lsra.h"
  68 #endif
  69 #endif
  70
  71 #include "vmcore/options.h"
  72 #include "vm/resolve.h"
  73
  74 #if defined(ENABLE_STATISTICS)
  75 # include "vmcore/statistics.h"
  76 #endif
  77
  78 /*#define STACK_VERBOSE*/
  79
  80
  81 /* macro for saving #ifdefs ***************************************************/
  82
  83 #if defined(ENABLE_STATISTICS)
  84 #define STATISTICS_STACKDEPTH_DISTRIBUTION(distr)                    \
  85     do {                                                             \
  86         if (opt_stat) {                                              \
  87             if (stackdepth >= 10)                                    \
  88                 count_store_depth[10]++;                             \
  89             else                                                     \
  90                 count_store_depth[stackdepth]++;                     \
  91         }                                                            \
  92     } while (0)
  93 #else /* !defined(ENABLE_STATISTICS) */
  94 #define STATISTICS_STACKDEPTH_DISTRIBUTION(distr)
  95 #endif
  96
  97
  98 #define MIN(a,b)  (((a) < (b)) ? (a) : (b))
  99
 100
 101 /* For returnAddresses we use a field of the typeinfo to store from which  */
 102 /* subroutine the returnAddress will return, if used.                      */
 103 /* XXX It would be nicer to use typeinfo.typeclass, but the verifier seems */
 104 /* to need it initialised to NULL. This should be investigated.            */
 105
 106 #if defined(ENABLE_VERIFIER)
 107 #define SBRSTART  typeinfo.elementclass.any
 108 #endif
 109
 110
 111 /* stackdata_t *****************************************************************
 112
 113    This struct holds internal data during stack analysis.
 114
 115 *******************************************************************************/
 116
 117 typedef struct stackdata_t stackdata_t;
 118
 119 struct stackdata_t {
 120     basicblock *bptr;             /* the current basic block being analysed   */
 121     stackptr new;                 /* next free stackelement                   */
 122     s4 vartop;                    /* next free variable index                 */
 123     s4 localcount;                /* number of locals (at the start of var)   */
 124     s4 varcount;                  /* maximum number of variables expected     */
 125         s4 varsallocated;             /* total number of variables allocated      */
 126         s4 maxlocals;                 /* max. number of Java locals               */
 127     varinfo *var;                 /* variable array (same as jd->var)         */
 128         s4 *javalocals;               /* map from Java locals to jd->var indices  */
 129         methodinfo *m;                /* the method being analysed                */
 130         jitdata *jd;                  /* current jitdata                          */
 131         basicblock *last_real_block;  /* the last block before the empty one      */
 132         bool repeat;                  /* if true, iterate the analysis again      */
 133         exception_entry **handlers;   /* exception handlers for the current block */
 134         exception_entry *extableend;  /* points to the last exception entry       */
 135         stackelement exstack;         /* instack for exception handlers           */
 136 };
 137
 138
 139 /* macros for allocating/releasing variable indices *****************/
 140
 141 #define GET_NEW_INDEX(sd, new_varindex)                              \
 142     do {                                                             \
 143         assert((sd).vartop < (sd).varcount);                         \
 144         (new_varindex) = ((sd).vartop)++;                            \
 145     } while (0)
 146
 147 /* Not implemented now - could be used to reuse varindices.         */
 148 /* Pay attention to not release a localvar once implementing it!    */
 149 #define RELEASE_INDEX(sd, varindex)
 150
 151 #define GET_NEW_VAR(sd, newvarindex, newtype)                        \
 152     do {                                                             \
 153         GET_NEW_INDEX((sd), (newvarindex));                          \
 154         (sd).var[newvarindex].type = (newtype);                      \
 155     } while (0)
 156
 157
 158 /* macros for querying variable properties **************************/
 159
 160 #define IS_INOUT(sp)                                                 \
 161     (sd.var[(sp)->varnum].flags & INOUT)
 162
 163 #define IS_PREALLOC(sp)                                              \
 164     (sd.var[(sp)->varnum].flags & PREALLOC)
 165
 166 #define IS_TEMPVAR(sp)                                                                                           \
 167     ( ((sp)->varnum >= sd.localcount)                                                            \
 168       && !(sd.var[(sp)->varnum].flags & (INOUT | PREALLOC)) )
 169
 170
 171 #define IS_LOCALVAR_SD(sd, sp)                                       \
 172          ((sp)->varnum < (sd).localcount)
 173
 174 #define IS_LOCALVAR(sp)                                              \
 175     IS_LOCALVAR_SD(sd, (sp))
 176
 177
 178 /* macros for setting variable properties ****************************/
 179
 180 #define SET_TEMPVAR(sp)                                              \
 181     do {                                                             \
 182         if (IS_LOCALVAR((sp))) {                                     \
 183             stack_change_to_tempvar(&sd, (sp), iptr);                \
 184         }                                                            \
 185         sd.var[(sp)->varnum].flags &= ~(INOUT | PREALLOC);           \
 186     } while (0);
 187
 188 #define SET_PREALLOC(sp)                                             \
 189     do {                                                             \
 190         assert(!IS_LOCALVAR((sp)));                                  \
 191         sd.var[(sp)->varnum].flags |= PREALLOC;                      \
 192     } while (0);
 193
 194
 195 /* macros for source operands ***************************************/
 196
 197 #define CLR_S1                                                       \
 198     (iptr->s1.varindex = -1)
 199
 200 #define USE_S1(type1)                                                \
 201     do {                                                             \
 202         REQUIRE(1);                                                  \
 203         CHECK_BASIC_TYPE(type1, curstack->type);                     \
 204         iptr->s1.varindex = curstack->varnum;                        \
 205     } while (0)
 206
 207 #define USE_S1_ANY                                                   \
 208     do {                                                             \
 209         REQUIRE(1);                                                  \
 210         iptr->s1.varindex = curstack->varnum;                        \
 211     } while (0)
 212
 213 #define USE_S1_S2(type1, type2)                                      \
 214     do {                                                             \
 215         REQUIRE(2);                                                  \
 216         CHECK_BASIC_TYPE(type1, curstack->prev->type);               \
 217         CHECK_BASIC_TYPE(type2, curstack->type);                     \
 218         iptr->sx.s23.s2.varindex = curstack->varnum;                 \
 219         iptr->s1.varindex = curstack->prev->varnum;                  \
 220     } while (0)
 221
 222 #define USE_S1_S2_ANY_ANY                                            \
 223     do {                                                             \
 224         REQUIRE(2);                                                  \
 225         iptr->sx.s23.s2.varindex = curstack->varnum;                 \
 226         iptr->s1.varindex = curstack->prev->varnum;                  \
 227     } while (0)
 228
 229 #define USE_S1_S2_S3(type1, type2, type3)                            \
 230     do {                                                             \
 231         REQUIRE(3);                                                  \
 232         CHECK_BASIC_TYPE(type1, curstack->prev->prev->type);         \
 233         CHECK_BASIC_TYPE(type2, curstack->prev->type);               \
 234         CHECK_BASIC_TYPE(type3, curstack->type);                     \
 235         iptr->sx.s23.s3.varindex = curstack->varnum;                 \
 236         iptr->sx.s23.s2.varindex = curstack->prev->varnum;           \
 237         iptr->s1.varindex = curstack->prev->prev->varnum;            \
 238     } while (0)
 239
 240 /* The POPANY macro does NOT check stackdepth, or set stackdepth!   */
 241 #define POPANY                                                       \
 242     do {                                                             \
 243         if (curstack->varkind == UNDEFVAR)                           \
 244             curstack->varkind = TEMPVAR;                             \
 245         curstack = curstack->prev;                                   \
 246     } while (0)
 247
 248 #define POP_S1(type1)                                                \
 249     do {                                                             \
 250         USE_S1(type1);                                               \
 251         if (curstack->varkind == UNDEFVAR)                           \
 252             curstack->varkind = TEMPVAR;                             \
 253         curstack = curstack->prev;                                   \
 254     } while (0)
 255
 256 #define POP_S1_ANY                                                   \
 257     do {                                                             \
 258         USE_S1_ANY;                                                  \
 259         if (curstack->varkind == UNDEFVAR)                           \
 260             curstack->varkind = TEMPVAR;                             \
 261         curstack = curstack->prev;                                   \
 262     } while (0)
 263
 264 #define POP_S1_S2(type1, type2)                                      \
 265     do {                                                             \
 266         USE_S1_S2(type1, type2);                                     \
 267         if (curstack->varkind == UNDEFVAR)                           \
 268             curstack->varkind = TEMPVAR;                             \
 269         if (curstack->prev->varkind == UNDEFVAR)                     \
 270             curstack->prev->varkind = TEMPVAR;                       \
 271         curstack = curstack->prev->prev;                             \
 272     } while (0)
 273
 274 #define POP_S1_S2_ANY_ANY                                            \
 275     do {                                                             \
 276         USE_S1_S2_ANY_ANY;                                           \
 277         if (curstack->varkind == UNDEFVAR)                           \
 278             curstack->varkind = TEMPVAR;                             \
 279         if (curstack->prev->varkind == UNDEFVAR)                     \
 280             curstack->prev->varkind = TEMPVAR;                       \
 281         curstack = curstack->prev->prev;                             \
 282     } while (0)
 283
 284 #define POP_S1_S2_S3(type1, type2, type3)                            \
 285     do {                                                             \
 286         USE_S1_S2_S3(type1, type2, type3);                           \
 287         if (curstack->varkind == UNDEFVAR)                           \
 288             curstack->varkind = TEMPVAR;                             \
 289         if (curstack->prev->varkind == UNDEFVAR)                     \
 290             curstack->prev->varkind = TEMPVAR;                       \
 291         if (curstack->prev->prev->varkind == UNDEFVAR)               \
 292             curstack->prev->prev->varkind = TEMPVAR;                 \
 293         curstack = curstack->prev->prev->prev;                       \
 294     } while (0)
 295
 296 #define CLR_SX                                                       \
 297     (iptr->sx.val.l = 0)
 298
 299
 300 /* macros for setting the destination operand ***********************/
 301
 302 #define CLR_DST                                                      \
 303     (iptr->dst.varindex = -1)
 304
 305 #define DST(typed, index)                                            \
 306     do {                                                             \
 307         NEWSTACKn((typed),(index));                                  \
 308         curstack->creator = iptr;                                    \
 309         iptr->dst.varindex = (index);                                \
 310     } while (0)
 311
 312 #define DST_LOCALVAR(typed, index)                                   \
 313     do {                                                             \
 314         NEWSTACK((typed), LOCALVAR, (index));                        \
 315         curstack->creator = iptr;                                    \
 316         iptr->dst.varindex = (index);                                \
 317     } while (0)
 318
 319
 320 /* macro for propagating constant values ****************************/
 321
 322 #if defined(ENABLE_VERIFIER)
 323 #define COPY_VAL_AND_TYPE_VAR(sv, dv)                                \
 324     do {                                                             \
 325         if (((dv)->type = (sv)->type) == TYPE_RET) {                 \
 326             (dv)->vv  = (sv)->vv;                                    \
 327             (dv)->SBRSTART = (sv)->SBRSTART;                         \
 328         }                                                            \
 329     } while (0)
 330 #else
 331 #define COPY_VAL_AND_TYPE_VAR(sv, dv)                                \
 332     do {                                                             \
 333         (dv)->type = (sv)->type;                                     \
 334         if (((dv)->type = (sv)->type) == TYPE_RET) {                 \
 335             (dv)->vv  = (sv)->vv;                                    \
 336         }                                                            \
 337     } while (0)
 338 #endif
 339
 340 #define COPY_VAL_AND_TYPE(sd, sindex, dindex)                        \
 341         COPY_VAL_AND_TYPE_VAR((sd).var + (sindex), (sd).var + (dindex))
 342
 343
 344 /* stack modelling macros *******************************************/
 345
 346 #define OP0_1(typed)                                                 \
 347     do {                                                             \
 348         CLR_S1;                                                      \
 349         GET_NEW_VAR(sd, new_index, (typed));                         \
 350         DST((typed), new_index);                                                                         \
 351         stackdepth++;                                                \
 352     } while (0)
 353
 354 #define OP1_0_ANY                                                    \
 355     do {                                                             \
 356         POP_S1_ANY;                                                  \
 357         CLR_DST;                                                     \
 358         stackdepth--;                                                \
 359     } while (0)
 360
 361 #define OP1_BRANCH(type1)                                            \
 362     do {                                                             \
 363         POP_S1(type1);                                               \
 364         stackdepth--;                                                \
 365     } while (0)
 366
 367 #define OP1_1(type1, typed)                                          \
 368     do {                                                             \
 369         POP_S1(type1);                                               \
 370         GET_NEW_VAR(sd, new_index, (typed));                         \
 371         DST(typed, new_index);                                       \
 372     } while (0)
 373
 374 #define OP2_1(type1, type2, typed)                                   \
 375     do {                                                             \
 376         POP_S1_S2(type1, type2);                                     \
 377         GET_NEW_VAR(sd, new_index, (typed));                         \
 378         DST(typed, new_index);                                       \
 379         stackdepth--;                                                \
 380     } while (0)
 381
 382 #define OP0_0                                                        \
 383     do {                                                             \
 384         CLR_S1;                                                      \
 385         CLR_DST;                                                     \
 386     } while (0)
 387
 388 #define OP0_BRANCH                                                   \
 389     do {                                                             \
 390         CLR_S1;                                                      \
 391     } while (0)
 392
 393 #define OP1_0(type1)                                                 \
 394     do {                                                             \
 395         POP_S1(type1);                                               \
 396         CLR_DST;                                                     \
 397         stackdepth--;                                                \
 398     } while (0)
 399
 400 #define OP2_0(type1, type2)                                          \
 401     do {                                                             \
 402         POP_S1_S2(type1, type2);                                     \
 403         CLR_DST;                                                     \
 404         stackdepth -= 2;                                             \
 405     } while (0)
 406
 407 #define OP2_BRANCH(type1, type2)                                     \
 408     do {                                                             \
 409         POP_S1_S2(type1, type2);                                     \
 410         stackdepth -= 2;                                             \
 411     } while (0)
 412
 413 #define OP2_0_ANY_ANY                                                \
 414     do {                                                             \
 415         POP_S1_S2_ANY_ANY;                                           \
 416         CLR_DST;                                                     \
 417         stackdepth -= 2;                                             \
 418     } while (0)
 419
 420 #define OP3_0(type1, type2, type3)                                   \
 421     do {                                                             \
 422         POP_S1_S2_S3(type1, type2, type3);                           \
 423         CLR_DST;                                                     \
 424         stackdepth -= 3;                                             \
 425     } while (0)
 426
 427 #define LOAD(type1, index)                                           \
 428     do {                                                             \
 429         DST_LOCALVAR(type1, index);                                  \
 430         stackdepth++;                                                \
 431     } while (0)
 432
 433 #define STORE(type1, index)                                          \
 434     do {                                                             \
 435         POP_S1(type1);                                               \
 436         stackdepth--;                                                \
 437     } while (0)
 438
 439
 440 /* macros for DUP elimination ***************************************/
 441
 442 /* XXX replace NEW_VAR with NEW_INDEX */
 443 #define DUP_SLOT(sp)                                                 \
 444     do {                                                             \
 445         GET_NEW_VAR(sd, new_index, (sp)->type);                      \
 446         COPY_VAL_AND_TYPE(sd, (sp)->varnum, new_index);              \
 447         NEWSTACK((sp)->type, TEMPVAR, new_index);                    \
 448     } while(0)
 449
 450 /* does not check input stackdepth */
 451 #define MOVE_UP(sp)                                                  \
 452     do {                                                             \
 453         iptr->opc = ICMD_MOVE;                                       \
 454         iptr->s1.varindex = (sp)->varnum;                            \
 455         DUP_SLOT(sp);                                                \
 456         curstack->creator = iptr;                                    \
 457         iptr->dst.varindex = curstack->varnum;                       \
 458         stackdepth++;                                                \
 459     } while (0)
 460
 461 /* does not check input stackdepth */
 462 #define COPY_UP(sp)                                                  \
 463     do {                                                             \
 464         SET_TEMPVAR((sp));                                           \
 465         iptr->opc = ICMD_COPY;                                       \
 466         iptr->s1.varindex = (sp)->varnum;                            \
 467         DUP_SLOT(sp);                                                \
 468         curstack->creator = iptr;                                    \
 469         iptr->dst.varindex = curstack->varnum;                       \
 470         stackdepth++;                                                \
 471     } while (0)
 472
 473 #define COPY_DOWN(s, d)                                              \
 474     do {                                                             \
 475         SET_TEMPVAR((s));                                            \
 476         iptr->opc = ICMD_COPY;                                       \
 477         iptr->s1.varindex = (s)->varnum;                             \
 478         iptr->dst.varindex = (d)->varnum;                            \
 479         (d)->creator = iptr;                                         \
 480     } while (0)
 481
 482 #define MOVE_TO_TEMP(sp)                                             \
 483     do {                                                             \
 484         GET_NEW_INDEX(sd, new_index);                                \
 485         iptr->opc = ICMD_MOVE;                                       \
 486         iptr->s1.varindex = (sp)->varnum;                            \
 487         iptr->dst.varindex = new_index;                              \
 488         COPY_VAL_AND_TYPE(sd, (sp)->varnum, new_index);              \
 489         (sp)->varnum = new_index;                                    \
 490                 (sp)->varkind = TEMPVAR;                                     \
 491     } while (0)
 492
 493 /* macros for branching / reaching basic blocks *********************/
 494
 495 #define BRANCH_TARGET(bt, tempbptr)                                  \
 496     do {                                                             \
 497         tempbptr = (bt).block;                                       \
 498         tempbptr = stack_mark_reached(&sd, tempbptr, curstack,       \
 499                                       stackdepth);                   \
 500         if (tempbptr == NULL)                                        \
 501             return false;                                            \
 502         (bt).block = tempbptr;                                       \
 503     } while (0)
 504
 505 #define BRANCH(tempbptr)                                             \
 506     BRANCH_TARGET(iptr->dst, tempbptr)
 507
 508
 509 /* forward declarations *******************************************************/
 510
 511 static void stack_create_invars(stackdata_t *sd, basicblock *b,
 512                                                                 stackptr curstack, int stackdepth);
 513 static void stack_create_invars_from_outvars(stackdata_t *sd, basicblock *b);
 514
 515 #if defined(STACK_VERBOSE)
 516 static void stack_verbose_show_varinfo(stackdata_t *sd, varinfo *v);
 517 static void stack_verbose_show_variable(stackdata_t *sd, s4 index);
 518 static void stack_verbose_show_block(stackdata_t *sd, basicblock *bptr);
 519 static void stack_verbose_block_enter(stackdata_t *sd, bool reanalyse);
 520 static void stack_verbose_block_exit(stackdata_t *sd, bool superblockend);
 521 static void stack_verbose_show_state(stackdata_t *sd, instruction *iptr,
 522                                                                          stackptr curstack);
 523 #endif
 524
 525
 526 /* stack_init ******************************************************************
 527
 528    Initialized the stack analysis subsystem (called by jit_init).
 529
 530 *******************************************************************************/
 531
 532 bool stack_init(void)
 533 {
 534         return true;
 535 }
 536
 537
 538 /* stack_grow_variable_array ***************************************************
 539
 540    Grow the variable array so the given number of additional variables fits in.
 541    The number is added to `varcount`, which is the maximum number of variables
 542    we expect to need at this point. The actual number of variables
 543    (`varsallocated`) may be larger than that, in order to avoid too many
 544    reallocations.
 545
 546    IN:
 547       sd...........stack analysis data
 548           num..........number of additional variables
 549
 550 *******************************************************************************/
 551
 552 static void stack_grow_variable_array(stackdata_t *sd, s4 num)
 553 {
 554         s4 newsize;
 555
 556         assert(num >= 0);
 557
 558         if (sd->varcount + num > sd->varsallocated) {
 559                 newsize = 2*sd->varsallocated + num;
 560
 561                 sd->var = DMREALLOC(sd->var, varinfo, sd->varsallocated, newsize);
 562                 MZERO(sd->var + sd->varsallocated, varinfo, (newsize - sd->varsallocated));
 563                 sd->varsallocated = newsize;
 564                 sd->jd->var = sd->var;
 565         }
 566
 567         sd->varcount += num;
 568         sd->jd->varcount += num;
 569
 570         assert(sd->varcount <= sd->varsallocated);
 571 }
 572
 573
 574 /* stack_append_block **********************************************************
 575
 576    Append the given block after the last real block of the method (before
 577    the pseudo-block at the end).
 578
 579    IN:
 580       sd...........stack analysis data
 581           b............the block to append
 582
 583 *******************************************************************************/
 584
 585 static void stack_append_block(stackdata_t *sd, basicblock *b)
 586 {
 587 #if defined(STACK_VERBOSE)
 588         printf("APPENDING BLOCK L%0d\n", b->nr);
 589 #endif
 590
 591         b->next = sd->last_real_block->next;
 592         sd->last_real_block->next = b;
 593         sd->last_real_block = b;
 594         b->nr = sd->jd->basicblockcount++;
 595         b->next->nr = b->nr + 1;
 596 }
 597
 598
 599 /* stack_clone_block ***********************************************************
 600
 601    Create a copy of the given block and insert it at the end of the method.
 602
 603    CAUTION: This function does not copy the any variables or the instruction
 604    list. It _does_, however, reserve space for the block's invars in the
 605    variable array.
 606
 607    IN:
 608       sd...........stack analysis data
 609           b............the block to clone
 610
 611    RETURN VALUE:
 612       a pointer to the copy
 613
 614 *******************************************************************************/
 615
 616 static basicblock * stack_clone_block(stackdata_t *sd, basicblock *b)
 617 {
 618         basicblock *clone;
 619
 620         clone = DNEW(basicblock);
 621         *clone  = *b;
 622
 623         clone->iinstr = NULL;
 624         clone->inlocals = NULL;
 625         clone->javalocals = NULL;
 626         clone->invars = NULL;
 627
 628         clone->original = (b->original) ? b->original : b;
 629         clone->copied_to = clone->original->copied_to;
 630         clone->original->copied_to = clone;
 631         clone->next = NULL;
 632         clone->flags = BBREACHED;
 633
 634         stack_append_block(sd, clone);
 635
 636         /* reserve space for the invars of the clone */
 637
 638         stack_grow_variable_array(sd, b->indepth);
 639
 640 #if defined(STACK_VERBOSE)
 641         printf("cloning block L%03d ------> L%03d\n", b->nr, clone->nr);
 642 #endif
 643
 644         return clone;
 645 }
 646
 647
 648 /* stack_create_locals *********************************************************
 649
 650    Create the local variables for the start of the given basic block.
 651
 652    IN:
 653       sd...........stack analysis data
 654           b............block to create the locals for
 655
 656 *******************************************************************************/
 657
 658 static void stack_create_locals(stackdata_t *sd, basicblock *b)
 659 {
 660         s4       i;
 661         s4      *jl;
 662         varinfo *dv;
 663
 664         /* copy the current state of the local variables */
 665         /* (one extra local is needed by the verifier)   */
 666
 667         dv = DMNEW(varinfo, sd->localcount + VERIFIER_EXTRA_LOCALS);
 668         b->inlocals = dv;
 669         for (i=0; i<sd->localcount; ++i)
 670                 *dv++ = sd->var[i];
 671
 672         /* the current map from java locals to cacao variables */
 673
 674         jl = DMNEW(s4, sd->maxlocals);
 675         b->javalocals = jl;
 676         MCOPY(jl, sd->javalocals, s4, sd->maxlocals);
 677 }
 678
 679
 680 /* stack_merge_locals **********************************************************
 681
 682    Merge local variables at the beginning of the given basic block.
 683
 684    IN:
 685       sd...........stack analysis data
 686           b............the block that is reached
 687
 688 *******************************************************************************/
 689
 690 static void stack_merge_locals(stackdata_t *sd, basicblock *b)
 691 {
 692         s4 i;
 693         varinfo *dv;
 694         varinfo *sv;
 695
 696         /* If a javalocal is mapped to different cacao locals along the */
 697         /* incoming control-flow edges, it becomes undefined.           */
 698
 699         for (i=0; i<sd->maxlocals; ++i) {
 700                 if (b->javalocals[i] != UNUSED && b->javalocals[i] != sd->javalocals[i]) {
 701                         b->javalocals[i] = UNUSED;
 702                         if (b->flags >= BBFINISHED)
 703                                 b->flags = BBTYPECHECK_REACHED;
 704                         if (b->nr <= sd->bptr->nr)
 705                                 sd->repeat = true;
 706                 }
 707         }
 708
 709 #if defined(ENABLE_VERIFIER)
 710         if (b->inlocals) {
 711                 for (i=0; i<sd->localcount; ++i) {
 712                         dv = b->inlocals + i;
 713                         sv = sd->var + i;
 714                         if ((sv->type == TYPE_RET && dv->type == TYPE_RET)
 715                                         && (sv->SBRSTART != dv->SBRSTART))
 716                         {
 717 #if defined(STACK_VERBOSE)
 718                                 printf("JSR MISMATCH: setting variable %d to VOID\n", i);
 719 #endif
 720                                 dv->type = TYPE_VOID;
 721                                 if (b->flags >= BBFINISHED)
 722                                         b->flags = BBTYPECHECK_REACHED;
 723                                 sd->repeat = true; /* This is very rare, so just repeat */
 724                         }
 725                 }
 726         }
 727 #endif /* defined(ENABLE_VERIFIER) */
 728 }
 729
 730
 731 /* stack_create_invars *********************************************************
 732
 733    Create the invars for the given basic block. Also make a copy of the locals.
 734
 735    IN:
 736       sd...........stack analysis data
 737           b............block to create the invars for
 738           curstack.....current stack top
 739           stackdepth...current stack depth
 740
 741    This function creates STACKDEPTH invars and sets their types to the
 742    types to the types of the corresponding slot in the current stack.
 743
 744 *******************************************************************************/
 745
 746 static void stack_create_invars(stackdata_t *sd, basicblock *b,
 747                                                                 stackptr curstack, int stackdepth)
 748 {
 749         stackptr sp;
 750         int i;
 751         int index;
 752         varinfo *dv;
 753         varinfo *sv;
 754
 755         assert(sd->vartop + stackdepth <= sd->varcount);
 756
 757         b->indepth = stackdepth;
 758         b->invars = DMNEW(s4, stackdepth);
 759
 760         /* allocate the variable indices */
 761         index = (sd->vartop += stackdepth);
 762
 763         i = stackdepth;
 764         for (sp = curstack; i--; sp = sp->prev) {
 765                 b->invars[i] = --index;
 766                 dv = sd->var + index;
 767                 sv = sd->var + sp->varnum;
 768                 dv->flags = INOUT;
 769                 COPY_VAL_AND_TYPE_VAR(sv, dv);
 770         }
 771
 772         stack_create_locals(sd, b);
 773 }
 774
 775
 776 /* stack_create_invars_from_outvars ********************************************
 777
 778    Create the invars for the given basic block. Also make a copy of the locals.
 779    Types are propagated from the outvars of the current block.
 780
 781    IN:
 782       sd...........stack analysis data
 783           b............block to create the invars for
 784
 785 *******************************************************************************/
 786
 787 static void stack_create_invars_from_outvars(stackdata_t *sd, basicblock *b)
 788 {
 789         int i;
 790         int n;
 791         varinfo *sv, *dv;
 792
 793         n = sd->bptr->outdepth;
 794         assert(sd->vartop + n <= sd->varcount);
 795
 796         b->indepth = n;
 797         b->invars = DMNEW(s4, n);
 798
 799         if (n) {
 800                 dv = sd->var + sd->vartop;
 801
 802                 /* allocate the invars */
 803
 804                 for (i=0; i<n; ++i, ++dv) {
 805                         sv = sd->var + sd->bptr->outvars[i];
 806                         b->invars[i] = sd->vartop++;
 807                         dv->flags = INOUT;
 808                         COPY_VAL_AND_TYPE_VAR(sv, dv);
 809                 }
 810         }
 811
 812         stack_create_locals(sd, b);
 813 }
 814
 815
 816 /* stack_check_invars **********************************************************
 817
 818    Check the current stack against the invars of the given basic block.
 819    Depth and types must match.
 820
 821    IN:
 822       sd...........stack analysis data
 823           b............block which invars to check against
 824           curstack.....current stack top
 825           stackdepth...current stack depth
 826
 827    RETURN VALUE:
 828       the destinaton block
 829           NULL.........a VerifyError has been thrown
 830
 831 *******************************************************************************/
 832
 833 static basicblock * stack_check_invars(stackdata_t *sd, basicblock *b,
 834                                                                            stackptr curstack, int stackdepth)
 835 {
 836         int i;
 837         stackptr sp;
 838         basicblock *orig;
 839         bool separable;
 840         varinfo *sv;
 841         varinfo *dv;
 842
 843 #if defined(STACK_VERBOSE)
 844         printf("stack_check_invars(L%03d)\n", b->nr);
 845 #endif
 846
 847         /* find original of b */
 848         if (b->original)
 849                 b = b->original;
 850         orig = b;
 851
 852 #if defined(STACK_VERBOSE)
 853         printf("original is L%03d\n", orig->nr);
 854 #endif
 855
 856         i = orig->indepth;
 857
 858 #if defined(ENABLE_VERIFIER)
 859         if (i != stackdepth) {
 860                 exceptions_throw_verifyerror(sd->m, "Stack depth mismatch");
 861                 return NULL;
 862         }
 863 #endif
 864
 865         do {
 866                 separable = false;
 867
 868 #if defined(STACK_VERBOSE)
 869                 printf("checking against ");
 870                 stack_verbose_show_block(sd, b); printf("\n");
 871 #endif
 872
 873                 sp = curstack;
 874                 for (i = orig->indepth; i--; sp = sp->prev) {
 875                         dv = sd->var + b->invars[i];
 876                         sv = sd->var + sp->varnum;
 877
 878 #if defined(ENABLE_VERIFIER)
 879                         if (dv->type != sp->type) {
 880                                 exceptions_throw_verifyerror_for_stack(sd->m, dv->type);
 881                                 return NULL;
 882                         }
 883 #endif
 884
 885                         if (sp->type == TYPE_RET) {
 886 #if defined(ENABLE_VERIFIER)
 887                                 if (dv->SBRSTART != sv->SBRSTART) {
 888                                         exceptions_throw_verifyerror(sd->m, "Mismatched stack types");
 889                                         return NULL;
 890                                 }
 891 #endif
 892                                 if (dv->vv.retaddr != sv->vv.retaddr) {
 893                                         separable = true;
 894                                         /* don't break! have to check the remaining stackslots */
 895                                 }
 896                         }
 897                 }
 898
 899                 if (b->inlocals) {
 900                         for (i=0; i<sd->localcount; ++i) {
 901                                 dv = b->inlocals + i;
 902                                 sv = sd->var + i;
 903                                 if (sv->type == TYPE_RET && dv->type == TYPE_RET) {
 904                                         if (
 905 #if defined(ENABLE_VERIFIER)
 906                                                         (sv->SBRSTART == dv->SBRSTART) &&
 907 #endif
 908                                                         (sv->vv.retaddr != dv->vv.retaddr))
 909                                         {
 910                                                 separable = true;
 911                                                 break;
 912                                         }
 913                                 }
 914                         }
 915                 }
 916
 917                 if (!separable) {
 918                         /* XXX cascading collapse? */
 919
 920                         stack_merge_locals(sd, b);
 921
 922 #if defined(STACK_VERBOSE)
 923                         printf("------> using L%03d\n", b->nr);
 924 #endif
 925                         return b;
 926                 }
 927         } while ((b = b->copied_to) != NULL);
 928
 929         b = stack_clone_block(sd, orig);
 930         if (!b)
 931                 return NULL;
 932
 933         stack_create_invars(sd, b, curstack, stackdepth);
 934         return b;
 935 }
 936
 937
 938 /* stack_check_invars_from_outvars *********************************************
 939
 940    Check the outvars of the current block against the invars of the given block.
 941    Depth and types must match.
 942
 943    IN:
 944       sd...........stack analysis data
 945           b............block which invars to check against
 946
 947    RETURN VALUE:
 948       the destinaton block
 949           NULL.........a VerifyError has been thrown
 950
 951 *******************************************************************************/
 952
 953 static basicblock * stack_check_invars_from_outvars(stackdata_t *sd, basicblock *b)
 954 {
 955         int i;
 956         int n;
 957         varinfo *sv, *dv;
 958         basicblock *orig;
 959         bool separable;
 960
 961 #if defined(STACK_VERBOSE)
 962         printf("stack_check_invars_from_outvars(L%03d)\n", b->nr);
 963 #endif
 964
 965         /* find original of b */
 966         if (b->original)
 967                 b = b->original;
 968         orig = b;
 969
 970 #if defined(STACK_VERBOSE)
 971         printf("original is L%03d\n", orig->nr);
 972 #endif
 973
 974         i = orig->indepth;
 975         n = sd->bptr->outdepth;
 976
 977 #if defined(ENABLE_VERIFIER)
 978         if (i != n) {
 979                 exceptions_throw_verifyerror(sd->m, "Stack depth mismatch");
 980                 return NULL;
 981         }
 982 #endif
 983
 984         do {
 985                 separable = false;
 986
 987 #if defined(STACK_VERBOSE)
 988                 printf("checking against ");
 989                 stack_verbose_show_block(sd, b); printf("\n");
 990 #endif
 991
 992                 if (n) {
 993                         dv = sd->var + b->invars[0];
 994
 995                         for (i=0; i<n; ++i, ++dv) {
 996                                 sv = sd->var + sd->bptr->outvars[i];
 997
 998 #if defined(ENABLE_VERIFIER)
 999                                 if (sv->type != dv->type) {
1000                                         exceptions_throw_verifyerror_for_stack(sd->m, dv->type);
1001                                         return NULL;
1002                                 }
1003 #endif
1004
1005                                 if (dv->type == TYPE_RET) {
1006 #if defined(ENABLE_VERIFIER)
1007                                         if (sv->SBRSTART != dv->SBRSTART) {
1008                                                 exceptions_throw_verifyerror(sd->m, "Mismatched stack types");
1009                                                 return NULL;
1010                                         }
1011 #endif
1012                                         if (sv->vv.retaddr != dv->vv.retaddr) {
1013                                                 separable = true;
1014                                                 /* don't break! have to check the remaining stackslots */
1015                                         }
1016                                 }
1017                         }
1018                 }
1019
1020                 if (b->inlocals) {
1021                         for (i=0; i<sd->localcount; ++i) {
1022                                 dv = b->inlocals + i;
1023                                 sv = sd->var + i;
1024                                 if (
1025 #if defined(ENABLE_VERIFIER)
1026                                                 (sv->SBRSTART == dv->SBRSTART) &&
1027 #endif
1028                                                 (sv->type == TYPE_RET && dv->type == TYPE_RET))
1029                                 {
1030                                         if (sv->vv.retaddr != dv->vv.retaddr) {
1031                                                 separable = true;
1032                                                 break;
1033                                         }
1034                                 }
1035                         }
1036                 }
1037
1038                 if (!separable) {
1039                         /* XXX cascading collapse? */
1040
1041                         stack_merge_locals(sd, b);
1042
1043 #if defined(STACK_VERBOSE)
1044                         printf("------> using L%03d\n", b->nr);
1045 #endif
1046                         return b;
1047                 }
1048         } while ((b = b->copied_to) != NULL);
1049
1050         b = stack_clone_block(sd, orig);
1051         if (!b)
1052                 return NULL;
1053
1054         stack_create_invars_from_outvars(sd, b);
1055         return b;
1056 }
1057
1058
1059 /* stack_create_instack ********************************************************
1060
1061    Create the instack of the current basic block.
1062
1063    IN:
1064       sd...........stack analysis data
1065
1066    RETURN VALUE:
1067       the current stack top at the start of the basic block.
1068
1069 *******************************************************************************/
1070
1071 static stackptr stack_create_instack(stackdata_t *sd)
1072 {
1073     stackptr sp;
1074         int depth;
1075         int index;
1076
1077         if ((depth = sd->bptr->indepth) == 0)
1078                 return NULL;
1079
1080     sp = (sd->new += depth);
1081
1082         while (depth--) {
1083                 sp--;
1084                 index = sd->bptr->invars[depth];
1085                 sp->varnum = index;
1086                 sp->type = sd->var[index].type;
1087                 sp->prev = sp - 1;
1088                 sp->creator = NULL;
1089                 sp->flags = 0;
1090                 sp->varkind = STACKVAR;
1091         }
1092         sp->prev = NULL;
1093
1094         /* return the top of the created stack */
1095         return sd->new - 1;
1096 }
1097
1098
1099 /* stack_mark_reached **********************************************************
1100
1101    Mark the given block reached and propagate the current stack and locals to
1102    it. This function specializes the target block, if necessary, and returns
1103    a pointer to the specialized target.
1104
1105    IN:
1106       sd...........stack analysis data
1107           b............the block to reach
1108           curstack.....the current stack top
1109           stackdepth...the current stack depth
1110
1111    RETURN VALUE:
1112       a pointer to (a specialized version of) the target
1113           NULL.........a VerifyError has been thrown
1114
1115 *******************************************************************************/
1116
1117 static basicblock *stack_mark_reached(stackdata_t *sd, basicblock *b, stackptr curstack, int stackdepth)
1118 {
1119         assert(b != NULL);
1120
1121 #if defined(STACK_VERBOSE)
1122         printf("stack_mark_reached(L%03d from L%03d)\n", b->nr, sd->bptr->nr);
1123 #endif
1124
1125         /* mark targets of backward branches */
1126
1127         if (b->nr <= sd->bptr->nr)
1128                 b->bitflags |= BBFLAG_REPLACEMENT;
1129
1130         if (b->flags < BBREACHED) {
1131                 /* b is reached for the first time. Create its invars. */
1132
1133 #if defined(STACK_VERBOSE)
1134                 printf("reached L%03d for the first time\n", b->nr);
1135 #endif
1136
1137                 stack_create_invars(sd, b, curstack, stackdepth);
1138
1139                 b->flags = BBREACHED;
1140
1141                 return b;
1142         }
1143         else {
1144                 /* b has been reached before. Check that its invars match. */
1145
1146                 return stack_check_invars(sd, b, curstack, stackdepth);
1147         }
1148 }
1149
1150
1151 /* stack_mark_reached_from_outvars *********************************************
1152
1153    Mark the given block reached and propagate the outvars of the current block
1154    and the current locals to it. This function specializes the target block,
1155    if necessary, and returns a pointer to the specialized target.
1156
1157    IN:
1158       sd...........stack analysis data
1159           b............the block to reach
1160
1161    RETURN VALUE:
1162       a pointer to (a specialized version of) the target
1163           NULL.........a VerifyError has been thrown
1164
1165 *******************************************************************************/
1166
1167 static basicblock *stack_mark_reached_from_outvars(stackdata_t *sd, basicblock *b)
1168 {
1169         assert(b != NULL);
1170
1171 #if defined(STACK_VERBOSE)
1172         printf("stack_mark_reached_from_outvars(L%03d from L%03d)\n", b->nr, sd->bptr->nr);
1173 #endif
1174
1175         /* mark targets of backward branches */
1176
1177         if (b->nr <= sd->bptr->nr)
1178                 b->bitflags |= BBFLAG_REPLACEMENT;
1179
1180         if (b->flags < BBREACHED) {
1181                 /* b is reached for the first time. Create its invars. */
1182
1183 #if defined(STACK_VERBOSE)
1184                 printf("reached L%03d for the first time\n", b->nr);
1185 #endif
1186
1187                 stack_create_invars_from_outvars(sd, b);
1188
1189                 b->flags = BBREACHED;
1190
1191                 return b;
1192         }
1193         else {
1194                 /* b has been reached before. Check that its invars match. */
1195
1196                 return stack_check_invars_from_outvars(sd, b);
1197         }
1198 }
1199
1200
1201 /* stack_reach_next_block ******************************************************
1202
1203    Mark the following block reached and propagate the outvars of the
1204    current block and the current locals to it.  This function
1205    specializes the target block, if necessary, and returns a pointer
1206    to the specialized target.
1207
1208    IN:
1209       sd...........stack analysis data
1210
1211    RETURN VALUE:
1212       a pointer to (a specialized version of) the following block
1213           NULL.........a VerifyError has been thrown
1214
1215 *******************************************************************************/
1216
1217 static bool stack_reach_next_block(stackdata_t *sd)
1218 {
1219         basicblock *tbptr;
1220         instruction *iptr;
1221
1222         tbptr = (sd->bptr->original) ? sd->bptr->original : sd->bptr;
1223         tbptr = stack_mark_reached_from_outvars(sd, tbptr->next);
1224
1225         if (tbptr == NULL)
1226                 return false;
1227
1228         if (tbptr != sd->bptr->next) {
1229 #if defined(STACK_VERBOSE)
1230                 printf("NEXT IS NON-CONSEQUITIVE L%03d\n", tbptr->nr);
1231 #endif
1232                 iptr = sd->bptr->iinstr + sd->bptr->icount - 1;
1233                 assert(iptr->opc == ICMD_NOP);
1234                 iptr->opc = ICMD_GOTO;
1235                 iptr->dst.block = tbptr;
1236
1237                 if (tbptr->flags < BBFINISHED)
1238                         sd->repeat = true; /* XXX check if we really need to repeat */
1239         }
1240
1241         return true;
1242 }
1243
1244
1245 /* stack_reach_handlers ********************************************************
1246
1247    Reach the exception handlers for the current block.
1248
1249    IN:
1250       sd...........stack analysis data
1251
1252    RETURN VALUE:
1253      true.........everything ok
1254          false........a VerifyError has been thrown
1255
1256 *******************************************************************************/
1257
1258 static bool stack_reach_handlers(stackdata_t *sd)
1259 {
1260         s4 i;
1261         basicblock *tbptr;
1262
1263 #if defined(STACK_VERBOSE)
1264         printf("reaching exception handlers...\n");
1265 #endif
1266
1267         for (i=0; sd->handlers[i]; ++i) {
1268                 tbptr = sd->handlers[i]->handler;
1269
1270                 tbptr->type = BBTYPE_EXH;
1271                 tbptr->predecessorcount = CFG_UNKNOWN_PREDECESSORS;
1272
1273                 /* reach (and specialize) the handler block */
1274
1275                 tbptr = stack_mark_reached(sd, tbptr, &(sd->exstack), 1);
1276
1277                 if (tbptr == NULL)
1278                         return false;
1279
1280                 sd->handlers[i]->handler = tbptr;
1281         }
1282
1283         return true;
1284 }
1285
1286
1287 /* stack_reanalyse_block  ******************************************************
1288
1289    Re-analyse the current block. This is called if either the block itself
1290    has already been analysed before, or the current block is a clone of an
1291    already analysed block, and this clone is reached for the first time.
1292    In the latter case, this function does all that is necessary for fully
1293    cloning the block (cloning the instruction list and variables, etc.).
1294
1295    IN:
1296       sd...........stack analysis data
1297
1298    RETURN VALUE:
1299      true.........everything ok
1300          false........a VerifyError has been thrown
1301
1302 *******************************************************************************/
1303
1304 #define RELOCATE(index)                                              \
1305     do {                                                             \
1306         if ((index) >= blockvarstart)                                \
1307             (index) += blockvarshift;                                \
1308         else if ((index) >= invarstart)                              \
1309             (index) += invarshift;                                   \
1310     } while (0)
1311
1312 bool stack_reanalyse_block(stackdata_t *sd)
1313 {
1314         instruction *iptr;
1315         basicblock *b;
1316         basicblock *orig;
1317         s4 len;
1318         s4 invarstart;
1319         s4 blockvarstart;
1320         s4 invarshift;
1321         s4 blockvarshift;
1322         s4 i, varindex;
1323         s4 *argp;
1324         branch_target_t *table;
1325         lookup_target_t *lookup;
1326         bool superblockend;
1327         bool cloneinstructions;
1328         exception_entry *ex;
1329
1330 #if defined(STACK_VERBOSE)
1331         stack_verbose_block_enter(sd, true);
1332 #endif
1333
1334         b = sd->bptr;
1335
1336         if (!b->iinstr) {
1337                 orig = b->original;
1338                 assert(orig != NULL);
1339
1340                 /* clone the instruction list */
1341
1342                 cloneinstructions = true;
1343
1344                 assert(orig->iinstr);
1345                 len = orig->icount;
1346                 iptr = DMNEW(instruction, len + 1);
1347
1348                 MCOPY(iptr, orig->iinstr, instruction, len);
1349                 iptr[len].opc = ICMD_NOP;
1350                 iptr[len].line = 0;
1351                 iptr[len].flags.bits = 0;
1352                 b->iinstr = iptr;
1353                 b->icount = ++len;
1354
1355                 /* reserve space for the clone's block variables */
1356
1357                 stack_grow_variable_array(sd, orig->varcount);
1358
1359                 /* we already have the invars set */
1360
1361                 assert(b->indepth == orig->indepth);
1362
1363                 /* calculate relocation shifts for invars and block variables */
1364
1365                 if (orig->indepth) {
1366                         invarstart = orig->invars[0];
1367                         invarshift = b->invars[0] - invarstart;
1368                 }
1369                 else {
1370                         invarstart = INT_MAX;
1371                         invarshift = 0;
1372                 }
1373                 blockvarstart = orig->varstart;
1374                 blockvarshift = sd->vartop - blockvarstart;
1375
1376                 /* copy block variables */
1377
1378                 b->varstart = sd->vartop;
1379                 b->varcount = orig->varcount;
1380                 sd->vartop += b->varcount;
1381                 MCOPY(sd->var + b->varstart, sd->var + orig->varstart, varinfo, b->varcount);
1382
1383                 /* copy outvars */
1384
1385                 b->outdepth = orig->outdepth;
1386                 b->outvars = DMNEW(s4, orig->outdepth);
1387                 MCOPY(b->outvars, orig->outvars, s4, orig->outdepth);
1388
1389                 /* clone exception handlers */
1390
1391                 for (i=0; sd->handlers[i]; ++i) {
1392                         ex = DNEW(exception_entry);
1393                         ex->handler = sd->handlers[i]->handler;
1394                         ex->start = b;
1395                         ex->end = b; /* XXX hack, see end of stack_analyse */
1396                         ex->catchtype = sd->handlers[i]->catchtype;
1397                         ex->down = NULL;
1398
1399                         assert(sd->extableend->down == NULL);
1400                         sd->extableend->down = ex;
1401                         sd->extableend = ex;
1402                         sd->jd->exceptiontablelength++;
1403
1404                         sd->handlers[i] = ex;
1405                 }
1406         }
1407         else {
1408                 cloneinstructions = false;
1409                 invarshift = 0;
1410                 blockvarshift = 0;
1411                 invarstart = sd->vartop;
1412                 blockvarstart = sd->vartop;
1413                 iptr = b->iinstr;
1414         }
1415
1416         if (b->original) {
1417                 /* find exception handlers for the cloned block */
1418                 len = 0;
1419                 ex = sd->jd->exceptiontable;
1420                 for (; ex != NULL; ex = ex->down) {
1421                         /* XXX the cloned exception handlers have identical */
1422                         /* start end end blocks.                            */
1423                         if ((ex->start == b) && (ex->end == b)) {
1424                                 sd->handlers[len++] = ex;
1425                         }
1426                 }
1427                 sd->handlers[len] = NULL;
1428         }
1429
1430 #if defined(STACK_VERBOSE)
1431         printf("invarstart = %d, blockvarstart = %d\n", invarstart, blockvarstart);
1432         printf("invarshift = %d, blockvarshift = %d\n", invarshift, blockvarshift);
1433 #endif
1434
1435         /* mark block as finished */
1436
1437         b->flags = BBFINISHED;
1438
1439         /* initialize locals at the start of this block */
1440
1441         if (b->inlocals)
1442                 MCOPY(sd->var, b->inlocals, varinfo, sd->localcount);
1443
1444         MCOPY(sd->javalocals, b->javalocals, s4, sd->maxlocals);
1445
1446         /* reach exception handlers for this block */
1447
1448         if (!stack_reach_handlers(sd))
1449                 return false;
1450
1451         superblockend = false;
1452
1453         for (len = b->icount; len--; iptr++) {
1454 #if defined(STACK_VERBOSE)
1455                 show_icmd(sd->jd, iptr, false, SHOW_STACK);
1456                 printf("\n");
1457 #endif
1458
1459                 switch (iptr->opc) {
1460                         case ICMD_RET:
1461                                 varindex = iptr->s1.varindex;
1462
1463 #if defined(ENABLE_VERIFIER)
1464                                 if (sd->var[varindex].type != TYPE_RET) {
1465                                         exceptions_throw_verifyerror(sd->m, "RET with non-returnAddress value");
1466                                         return false;
1467                                 }
1468 #endif
1469
1470                                 iptr->dst.block = stack_mark_reached_from_outvars(sd, sd->var[varindex].vv.retaddr);
1471                                 superblockend = true;
1472                                 break;
1473
1474                         case ICMD_JSR:
1475                                 iptr->sx.s23.s3.jsrtarget.block = stack_mark_reached_from_outvars(sd, iptr->sx.s23.s3.jsrtarget.block);
1476                                 RELOCATE(iptr->dst.varindex);
1477                                 superblockend = true;
1478                                 break;
1479
1480                         case ICMD_RETURN:
1481                                 superblockend = true;
1482                                 break;
1483
1484                         case ICMD_CHECKNULL:
1485                         case ICMD_PUTSTATICCONST:
1486                                 break;
1487
1488                         case ICMD_NOP:
1489                         case ICMD_IINC:
1490                                 break;
1491
1492                         case ICMD_GOTO:
1493                                 iptr->dst.block = stack_mark_reached_from_outvars(sd, iptr->dst.block);
1494                                 superblockend = true;
1495                                 break;
1496
1497                                 /* pop 0 push 1 const */
1498
1499                         case ICMD_ACONST:
1500                         case ICMD_ICONST:
1501                         case ICMD_LCONST:
1502                         case ICMD_FCONST:
1503                         case ICMD_DCONST:
1504
1505                                 /* pop 0 push 1 load */
1506
1507                         case ICMD_ILOAD:
1508                         case ICMD_LLOAD:
1509                         case ICMD_FLOAD:
1510                         case ICMD_DLOAD:
1511                         case ICMD_ALOAD:
1512                                 RELOCATE(iptr->dst.varindex);
1513                                 break;
1514
1515                                 /* pop 2 push 1 */
1516
1517                         case ICMD_IALOAD:
1518                         case ICMD_LALOAD:
1519                         case ICMD_FALOAD:
1520                         case ICMD_DALOAD:
1521                         case ICMD_AALOAD:
1522                         case ICMD_BALOAD:
1523                         case ICMD_CALOAD:
1524                         case ICMD_SALOAD:
1525                                 RELOCATE(iptr->sx.s23.s2.varindex);
1526                                 RELOCATE(iptr->s1.varindex);
1527                                 RELOCATE(iptr->dst.varindex);
1528                                 break;
1529
1530                                 /* pop 3 push 0 */
1531
1532                         case ICMD_IASTORE:
1533                         case ICMD_LASTORE:
1534                         case ICMD_FASTORE:
1535                         case ICMD_DASTORE:
1536                         case ICMD_AASTORE:
1537                         case ICMD_BASTORE:
1538                         case ICMD_CASTORE:
1539                         case ICMD_SASTORE:
1540                                 RELOCATE(iptr->sx.s23.s3.varindex);
1541                                 RELOCATE(iptr->sx.s23.s2.varindex);
1542                                 RELOCATE(iptr->s1.varindex);
1543                                 break;
1544
1545                                 /* pop 1 push 0 store */
1546
1547                         case ICMD_ISTORE:
1548                         case ICMD_LSTORE:
1549                         case ICMD_FSTORE:
1550                         case ICMD_DSTORE:
1551                         case ICMD_ASTORE:
1552                                 RELOCATE(iptr->s1.varindex);
1553
1554                                 varindex = iptr->dst.varindex;
1555                                 COPY_VAL_AND_TYPE(*sd, iptr->s1.varindex, varindex);
1556                                 i = iptr->sx.s23.s3.javaindex;
1557                                 if (iptr->flags.bits & INS_FLAG_RETADDR) {
1558                                         iptr->sx.s23.s2.retaddrnr =
1559                                                 JAVALOCAL_FROM_RETADDR(sd->var[varindex].vv.retaddr->nr);
1560                                         sd->javalocals[i] = iptr->sx.s23.s2.retaddrnr;
1561                                 }
1562                                 else
1563                                         sd->javalocals[i] = varindex;
1564                                 if (iptr->flags.bits & INS_FLAG_KILL_PREV)
1565                                         sd->javalocals[i-1] = UNUSED;
1566                                 if (iptr->flags.bits & INS_FLAG_KILL_NEXT)
1567                                         sd->javalocals[i+1] = UNUSED;
1568                                 break;
1569
1570                                 /* pop 1 push 0 */
1571
1572                         case ICMD_ARETURN:
1573                         case ICMD_ATHROW:
1574                         case ICMD_IRETURN:
1575                         case ICMD_LRETURN:
1576                         case ICMD_FRETURN:
1577                         case ICMD_DRETURN:
1578                                 RELOCATE(iptr->s1.varindex);
1579                                 superblockend = true;
1580                                 break;
1581
1582                         case ICMD_PUTSTATIC:
1583                         case ICMD_PUTFIELDCONST:
1584                         case ICMD_POP:
1585                                 RELOCATE(iptr->s1.varindex);
1586                                 break;
1587
1588                                 /* pop 1 push 0 branch */
1589
1590                         case ICMD_IFNULL:
1591                         case ICMD_IFNONNULL:
1592
1593                         case ICMD_IFEQ:
1594                         case ICMD_IFNE:
1595                         case ICMD_IFLT:
1596                         case ICMD_IFGE:
1597                         case ICMD_IFGT:
1598                         case ICMD_IFLE:
1599
1600                         case ICMD_IF_LEQ:
1601                         case ICMD_IF_LNE:
1602                         case ICMD_IF_LLT:
1603                         case ICMD_IF_LGE:
1604                         case ICMD_IF_LGT:
1605                         case ICMD_IF_LLE:
1606                                 RELOCATE(iptr->s1.varindex);
1607                                 iptr->dst.block = stack_mark_reached_from_outvars(sd, iptr->dst.block);
1608                                 break;
1609
1610                                 /* pop 1 push 0 table branch */
1611
1612                         case ICMD_TABLESWITCH:
1613                                 i = iptr->sx.s23.s3.tablehigh - iptr->sx.s23.s2.tablelow + 1 + 1;
1614
1615                                 if (cloneinstructions) {
1616                                         table = DMNEW(branch_target_t, i);
1617                                         MCOPY(table, iptr->dst.table, branch_target_t, i);
1618                                         iptr->dst.table = table;
1619                                 }
1620                                 else {
1621                                         table = iptr->dst.table;
1622                                 }
1623
1624                                 RELOCATE(iptr->s1.varindex);
1625                                 while (i--) {
1626                                         table->block = stack_mark_reached_from_outvars(sd, table->block);
1627                                         table++;
1628                                 }
1629                                 superblockend = true;
1630                                 break;
1631
1632                         case ICMD_LOOKUPSWITCH:
1633                                 i = iptr->sx.s23.s2.lookupcount;
1634                                 if (cloneinstructions) {
1635                                         lookup = DMNEW(lookup_target_t, i);
1636                                         MCOPY(lookup, iptr->dst.lookup, lookup_target_t, i);
1637                                         iptr->dst.lookup = lookup;
1638                                 }
1639                                 else {
1640                                         lookup = iptr->dst.lookup;
1641                                 }
1642                                 RELOCATE(iptr->s1.varindex);
1643                                 while (i--) {
1644                                         lookup->target.block = stack_mark_reached_from_outvars(sd, lookup->target.block);
1645                                         lookup++;
1646                                 }
1647                                 iptr->sx.s23.s3.lookupdefault.block = stack_mark_reached_from_outvars(sd, iptr->sx.s23.s3.lookupdefault.block);
1648                                 superblockend = true;
1649                                 break;
1650
1651                         case ICMD_MONITORENTER:
1652                         case ICMD_MONITOREXIT:
1653                                 RELOCATE(iptr->s1.varindex);
1654                                 break;
1655
1656                                 /* pop 2 push 0 branch */
1657
1658                         case ICMD_IF_ICMPEQ:
1659                         case ICMD_IF_ICMPNE:
1660                         case ICMD_IF_ICMPLT:
1661                         case ICMD_IF_ICMPGE:
1662                         case ICMD_IF_ICMPGT:
1663                         case ICMD_IF_ICMPLE:
1664
1665                         case ICMD_IF_LCMPEQ:
1666                         case ICMD_IF_LCMPNE:
1667                         case ICMD_IF_LCMPLT:
1668                         case ICMD_IF_LCMPGE:
1669                         case ICMD_IF_LCMPGT:
1670                         case ICMD_IF_LCMPLE:
1671
1672                         case ICMD_IF_FCMPEQ:
1673                         case ICMD_IF_FCMPNE:
1674
1675                         case ICMD_IF_FCMPL_LT:
1676                         case ICMD_IF_FCMPL_GE:
1677                         case ICMD_IF_FCMPL_GT:
1678                         case ICMD_IF_FCMPL_LE:
1679
1680                         case ICMD_IF_FCMPG_LT:
1681                         case ICMD_IF_FCMPG_GE:
1682                         case ICMD_IF_FCMPG_GT:
1683                         case ICMD_IF_FCMPG_LE:
1684
1685                         case ICMD_IF_DCMPEQ:
1686                         case ICMD_IF_DCMPNE:
1687
1688                         case ICMD_IF_DCMPL_LT:
1689                         case ICMD_IF_DCMPL_GE:
1690                         case ICMD_IF_DCMPL_GT:
1691                         case ICMD_IF_DCMPL_LE:
1692
1693                         case ICMD_IF_DCMPG_LT:
1694                         case ICMD_IF_DCMPG_GE:
1695                         case ICMD_IF_DCMPG_GT:
1696                         case ICMD_IF_DCMPG_LE:
1697
1698                         case ICMD_IF_ACMPEQ:
1699                         case ICMD_IF_ACMPNE:
1700                                 RELOCATE(iptr->sx.s23.s2.varindex);
1701                                 RELOCATE(iptr->s1.varindex);
1702                                 iptr->dst.block = stack_mark_reached_from_outvars(sd, iptr->dst.block);
1703                                 break;
1704
1705                                 /* pop 2 push 0 */
1706
1707                         case ICMD_PUTFIELD:
1708                         case ICMD_IASTORECONST:
1709                         case ICMD_LASTORECONST:
1710                         case ICMD_AASTORECONST:
1711                         case ICMD_BASTORECONST:
1712                         case ICMD_CASTORECONST:
1713                         case ICMD_SASTORECONST:
1714                         case ICMD_POP2:
1715                                 RELOCATE(iptr->sx.s23.s2.varindex);
1716                                 RELOCATE(iptr->s1.varindex);
1717                                 break;
1718
1719                                 /* pop 0 push 1 copy */
1720
1721                         case ICMD_COPY:
1722                         case ICMD_MOVE:
1723                                 RELOCATE(iptr->dst.varindex);
1724                                 RELOCATE(iptr->s1.varindex);
1725                                 COPY_VAL_AND_TYPE(*sd, iptr->s1.varindex, iptr->dst.varindex);
1726                                 break;
1727
1728                                 /* pop 2 push 1 */
1729
1730                         case ICMD_IDIV:
1731                         case ICMD_IREM:
1732                         case ICMD_LDIV:
1733                         case ICMD_LREM:
1734                         case ICMD_IADD:
1735                         case ICMD_ISUB:
1736                         case ICMD_IMUL:
1737                         case ICMD_ISHL:
1738                         case ICMD_ISHR:
1739                         case ICMD_IUSHR:
1740                         case ICMD_IAND:
1741                         case ICMD_IOR:
1742                         case ICMD_IXOR:
1743                         case ICMD_LADD:
1744                         case ICMD_LSUB:
1745                         case ICMD_LMUL:
1746                         case ICMD_LOR:
1747                         case ICMD_LAND:
1748                         case ICMD_LXOR:
1749                         case ICMD_LSHL:
1750                         case ICMD_LSHR:
1751                         case ICMD_LUSHR:
1752                         case ICMD_FADD:
1753                         case ICMD_FSUB:
1754                         case ICMD_FMUL:
1755                         case ICMD_FDIV:
1756                         case ICMD_FREM:
1757                         case ICMD_DADD:
1758                         case ICMD_DSUB:
1759                         case ICMD_DMUL:
1760                         case ICMD_DDIV:
1761                         case ICMD_DREM:
1762                         case ICMD_LCMP:
1763                         case ICMD_FCMPL:
1764                         case ICMD_FCMPG:
1765                         case ICMD_DCMPL:
1766                         case ICMD_DCMPG:
1767                                 RELOCATE(iptr->sx.s23.s2.varindex);
1768                                 RELOCATE(iptr->s1.varindex);
1769                                 RELOCATE(iptr->dst.varindex);
1770                                 break;
1771
1772                                 /* pop 1 push 1 */
1773
1774                         case ICMD_CHECKCAST:
1775                         case ICMD_ARRAYLENGTH:
1776                         case ICMD_INSTANCEOF:
1777                         case ICMD_NEWARRAY:
1778                         case ICMD_ANEWARRAY:
1779                         case ICMD_GETFIELD:
1780                         case ICMD_IADDCONST:
1781                         case ICMD_ISUBCONST:
1782                         case ICMD_IMULCONST:
1783                         case ICMD_IMULPOW2:
1784                         case ICMD_IDIVPOW2:
1785                         case ICMD_IREMPOW2:
1786                         case ICMD_IANDCONST:
1787                         case ICMD_IORCONST:
1788                         case ICMD_IXORCONST:
1789                         case ICMD_ISHLCONST:
1790                         case ICMD_ISHRCONST:
1791                         case ICMD_IUSHRCONST:
1792                         case ICMD_LADDCONST:
1793                         case ICMD_LSUBCONST:
1794                         case ICMD_LMULCONST:
1795                         case ICMD_LMULPOW2:
1796                         case ICMD_LDIVPOW2:
1797                         case ICMD_LREMPOW2:
1798                         case ICMD_LANDCONST:
1799                         case ICMD_LORCONST:
1800                         case ICMD_LXORCONST:
1801                         case ICMD_LSHLCONST:
1802                         case ICMD_LSHRCONST:
1803                         case ICMD_LUSHRCONST:
1804                         case ICMD_INEG:
1805                         case ICMD_INT2BYTE:
1806                         case ICMD_INT2CHAR:
1807                         case ICMD_INT2SHORT:
1808                         case ICMD_LNEG:
1809                         case ICMD_FNEG:
1810                         case ICMD_DNEG:
1811                         case ICMD_I2L:
1812                         case ICMD_I2F:
1813                         case ICMD_I2D:
1814                         case ICMD_L2I:
1815                         case ICMD_L2F:
1816                         case ICMD_L2D:
1817                         case ICMD_F2I:
1818                         case ICMD_F2L:
1819                         case ICMD_F2D:
1820                         case ICMD_D2I:
1821                         case ICMD_D2L:
1822                         case ICMD_D2F:
1823                                 RELOCATE(iptr->s1.varindex);
1824                                 RELOCATE(iptr->dst.varindex);
1825                                 break;
1826
1827                                 /* pop 0 push 1 */
1828
1829                         case ICMD_GETSTATIC:
1830                         case ICMD_NEW:
1831                                 RELOCATE(iptr->dst.varindex);
1832                                 break;
1833
1834                                 /* pop many push any */
1835
1836                         case ICMD_INVOKESTATIC:
1837                         case ICMD_INVOKESPECIAL:
1838                         case ICMD_INVOKEVIRTUAL:
1839                         case ICMD_INVOKEINTERFACE:
1840                         case ICMD_BUILTIN:
1841                         case ICMD_MULTIANEWARRAY:
1842                                 i = iptr->s1.argcount;
1843                                 if (cloneinstructions) {
1844                                         argp = DMNEW(s4, i);
1845                                         MCOPY(argp, iptr->sx.s23.s2.args, s4, i);
1846                                         iptr->sx.s23.s2.args = argp;
1847                                 }
1848                                 else {
1849                                         argp = iptr->sx.s23.s2.args;
1850                                 }
1851
1852                                 while (--i >= 0) {
1853                                         RELOCATE(*argp);
1854                                         argp++;
1855                                 }
1856                                 RELOCATE(iptr->dst.varindex);
1857                                 break;
1858
1859                         default:
1860                                 exceptions_throw_internalerror("Unknown ICMD %d during stack re-analysis",
1861                                                                                            iptr->opc);
1862                                 return false;
1863                 } /* switch */
1864
1865 #if defined(STACK_VERBOSE)
1866                 show_icmd(sd->jd, iptr, false, SHOW_STACK);
1867                 printf("\n");
1868 #endif
1869         }
1870
1871         /* relocate outvars */
1872
1873         for (i=0; i<b->outdepth; ++i) {
1874                 RELOCATE(b->outvars[i]);
1875         }
1876
1877 #if defined(STACK_VERBOSE)
1878         stack_verbose_block_exit(sd, superblockend);
1879 #endif
1880
1881         /* propagate to the next block */
1882
1883         if (!superblockend)
1884                 if (!stack_reach_next_block(sd))
1885                         return false;
1886
1887         return true;
1888 }
1889
1890
1891 /* stack_change_to_tempvar *****************************************************
1892
1893    Change the given stackslot to a TEMPVAR. This includes creating a new
1894    temporary variable and changing the dst.varindex of the creator of the
1895    stacklot to the new variable index. If this stackslot has been passed
1896    through ICMDs between the point of its creation and the current point,
1897    then the variable index is also changed in these ICMDs.
1898
1899    IN:
1900       sd...........stack analysis data
1901           sp...........stackslot to change
1902           ilimit.......instruction up to which to look for ICMDs passing-through
1903                        the stackslot (exclusive). This may point exactly after the
1904                                    last instruction, in which case the search is done to the
1905                                    basic block end.
1906
1907 *******************************************************************************/
1908
1909 static void stack_change_to_tempvar(stackdata_t *sd, stackptr sp,
1910                                                                         instruction *ilimit)
1911 {
1912         s4 newindex;
1913         s4 oldindex;
1914         instruction *iptr;
1915         s4 depth;
1916         s4 i;
1917
1918         oldindex = sp->varnum;
1919
1920         /* create a new temporary variable */
1921
1922         GET_NEW_VAR(*sd, newindex, sp->type);
1923
1924         sd->var[newindex].flags = sp->flags;
1925
1926         /* change the stackslot */
1927
1928         sp->varnum = newindex;
1929         sp->varkind = TEMPVAR;
1930
1931         /* change the dst.varindex of the stackslot's creator */
1932
1933         if (sp->creator)
1934                 sp->creator->dst.varindex = newindex;
1935
1936         /* handle ICMDs this stackslot passed through, if any */
1937
1938         if (sp->flags & PASSTHROUGH) {
1939                 iptr = (sp->creator) ? (sp->creator + 1) : sd->bptr->iinstr;
1940
1941                 /* assert that the limit points to an ICMD, or after the last one */
1942
1943                 assert(ilimit >= sd->bptr->iinstr);
1944                 assert(ilimit <= sd->bptr->iinstr + sd->bptr->icount);
1945
1946                 /* find the stackdepth under sp plus one */
1947                 /* Note: This number is usually known when this function is called, */
1948                 /* but calculating it here is less error-prone and should not be    */
1949                 /* a performance problem.                                           */
1950
1951                 for (depth = 0; sp != NULL; sp = sp->prev)
1952                         depth++;
1953
1954                 /* iterate over all instructions in the range and replace */
1955
1956                 for (; iptr < ilimit; ++iptr) {
1957                         switch (iptr->opc) {
1958                                 case ICMD_INVOKESTATIC:
1959                                 case ICMD_INVOKESPECIAL:
1960                                 case ICMD_INVOKEVIRTUAL:
1961                                 case ICMD_INVOKEINTERFACE:
1962                                 case ICMD_BUILTIN:
1963                                         i = iptr->s1.argcount - depth;
1964                                         if (iptr->sx.s23.s2.args[i] == oldindex) {
1965                                                 iptr->sx.s23.s2.args[i] = newindex;
1966                                         }
1967                                         break;
1968                                 /* IMPORTANT: If any ICMD sets the PASSTHROUGH flag of a */
1969                                 /* stackslot, it must be added in this switch!           */
1970                         }
1971                 }
1972         }
1973 }
1974
1975
1976 /* stack_init_javalocals *******************************************************
1977
1978    Initialize the mapping from Java locals to cacao variables at method entry.
1979
1980    IN:
1981       sd...........stack analysis data
1982
1983 *******************************************************************************/
1984
1985 static void stack_init_javalocals(stackdata_t *sd)
1986 {
1987         s4         *jl;
1988         s4          type,i,j;
1989         methoddesc *md;
1990         jitdata    *jd;
1991
1992         jd = sd->jd;
1993
1994         jl = DMNEW(s4, sd->maxlocals);
1995         jd->basicblocks[0].javalocals = jl;
1996
1997         for (i=0; i<sd->maxlocals; ++i)
1998                 jl[i] = UNUSED;
1999
2000         md = jd->m->parseddesc;
2001         j = 0;
2002         for (i=0; i<md->paramcount; ++i) {
2003                 type = md->paramtypes[i].type;
2004                 jl[j] = jd->local_map[5*j + type];
2005                 j++;
2006                 if (IS_2_WORD_TYPE(type))
2007                         j++;
2008         }
2009 }
2010
2011
2012 /* stack_analyse ***************************************************************
2013
2014    Analyse_stack uses the intermediate code created by parse.c to
2015    build a model of the JVM operand stack for the current method.
2016
2017    The following checks are performed:
2018      - check for operand stack underflow (before each instruction)
2019      - check for operand stack overflow (after[1] each instruction)
2020      - check for matching stack depth at merging points
2021      - check for matching basic types[2] at merging points
2022      - check basic types for instruction input (except for BUILTIN*
2023            opcodes, INVOKE* opcodes and MULTIANEWARRAY)
2024
2025    [1]) Checking this after the instruction should be ok. parse.c
2026    counts the number of required stack slots in such a way that it is
2027    only vital that we don't exceed `maxstack` at basic block
2028    boundaries.
2029
2030    [2]) 'basic types' means the distinction between INT, LONG, FLOAT,
2031    DOUBLE and ADDRESS types. Subtypes of INT and different ADDRESS
2032    types are not discerned.
2033
2034 *******************************************************************************/
2035
2036 bool stack_analyse(jitdata *jd)
2037 {
2038         methodinfo   *m;              /* method being analyzed                    */
2039         registerdata *rd;
2040         stackdata_t   sd;
2041         int           stackdepth;
2042         stackptr      curstack;       /* current stack top                        */
2043         stackptr      copy;
2044         int           opcode;         /* opcode of current instruction            */
2045         int           i, varindex;
2046         int           javaindex;
2047         int           type;           /* operand type                             */
2048         int           len;            /* # of instructions after the current one  */
2049         bool          superblockend;  /* if true, no fallthrough to next block    */
2050         bool          deadcode;       /* true if no live code has been reached    */
2051         instruction  *iptr;           /* the current instruction                  */
2052         basicblock   *tbptr;
2053         basicblock   *original;
2054         exception_entry *ex;
2055
2056         stackptr     *last_store_boundary;
2057         stackptr      coalescing_boundary;
2058
2059         stackptr      src1, src2, src3, src4, dst1, dst2;
2060
2061         branch_target_t *table;
2062         lookup_target_t *lookup;
2063 #if defined(ENABLE_VERIFIER)
2064         int           expectedtype;   /* used by CHECK_BASIC_TYPE                 */
2065 #endif
2066         builtintable_entry *bte;
2067         methoddesc         *md;
2068         constant_FMIref    *fmiref;
2069 #if defined(ENABLE_STATISTICS)
2070         int           iteration_count;  /* number of iterations of analysis       */
2071 #endif
2072         int           new_index; /* used to get a new var index with GET_NEW_INDEX*/
2073
2074 #if defined(STACK_VERBOSE)
2075         show_method(jd, SHOW_PARSE);
2076 #endif
2077
2078         /* get required compiler data - initialization */
2079
2080         m    = jd->m;
2081         rd   = jd->rd;
2082
2083         /* initialize the stackdata_t struct */
2084
2085         sd.m = m;
2086         sd.jd = jd;
2087         sd.varcount = jd->varcount;
2088         sd.vartop =  jd->vartop;
2089         sd.localcount = jd->localcount;
2090         sd.var = jd->var;
2091         sd.varsallocated = sd.varcount;
2092         sd.maxlocals = m->maxlocals;
2093         sd.javalocals = DMNEW(s4, sd.maxlocals);
2094         sd.handlers = DMNEW(exception_entry *, jd->exceptiontablelength + 1);
2095
2096         /* prepare the variable for exception handler stacks               */
2097         /* (has been reserved by STACK_EXTRA_VARS, or VERIFIER_EXTRA_VARS) */
2098
2099         sd.exstack.type = TYPE_ADR;
2100         sd.exstack.prev = NULL;
2101         sd.exstack.varnum = sd.localcount;
2102         sd.var[sd.exstack.varnum].type = TYPE_ADR;
2103
2104 #if defined(ENABLE_STATISTICS)
2105         iteration_count = 0;
2106 #endif
2107
2108         /* find the last real basic block */
2109
2110         sd.last_real_block = NULL;
2111         tbptr = jd->basicblocks;
2112         while (tbptr->next) {
2113                 sd.last_real_block = tbptr;
2114                 tbptr = tbptr->next;
2115         }
2116         assert(sd.last_real_block);
2117
2118         /* find the last exception handler */
2119
2120         if (jd->exceptiontablelength)
2121                 sd.extableend = jd->exceptiontable + jd->exceptiontablelength - 1;
2122         else
2123                 sd.extableend = NULL;
2124
2125         /* init jd->interface_map */
2126
2127         jd->maxinterfaces = m->maxstack;
2128         jd->interface_map = DMNEW(interface_info, m->maxstack * 5);
2129         for (i = 0; i < m->maxstack * 5; i++)
2130                 jd->interface_map[i].flags = UNUSED;
2131
2132         last_store_boundary = DMNEW(stackptr, m->maxlocals);
2133
2134         /* initialize flags and invars (none) of first block */
2135
2136         jd->basicblocks[0].flags = BBREACHED;
2137         jd->basicblocks[0].invars = NULL;
2138         jd->basicblocks[0].indepth = 0;
2139         jd->basicblocks[0].inlocals =
2140                 DMNEW(varinfo, jd->localcount + VERIFIER_EXTRA_LOCALS);
2141         MCOPY(jd->basicblocks[0].inlocals, jd->var, varinfo,
2142                         jd->localcount + VERIFIER_EXTRA_LOCALS);
2143
2144         /* initialize java local mapping of first block */
2145
2146         stack_init_javalocals(&sd);
2147
2148         /* stack analysis loop (until fixpoint reached) **************************/
2149
2150         do {
2151 #if defined(ENABLE_STATISTICS)
2152                 iteration_count++;
2153 #endif
2154
2155                 /* initialize loop over basic blocks */
2156
2157                 sd.bptr       = jd->basicblocks;
2158                 superblockend = true;
2159                 sd.repeat     = false;
2160                 curstack      = NULL;
2161                 stackdepth    = 0;
2162                 deadcode      = true;
2163
2164                 /* iterate over basic blocks *****************************************/
2165
2166                 for (; sd.bptr; sd.bptr = sd.bptr->next) {
2167
2168                         if (sd.bptr->flags == BBDELETED) {
2169                                 /* This block has been deleted - do nothing. */
2170
2171                                 continue;
2172                         }
2173
2174                         if (sd.bptr->flags == BBTYPECHECK_REACHED) {
2175                                 /* re-analyse a block because its input changed */
2176
2177                                 deadcode = false;
2178
2179                                 if (!stack_reanalyse_block(&sd))
2180                                         return false;
2181
2182                                 superblockend = true; /* XXX */
2183                                 continue;
2184                         }
2185
2186                         if (superblockend && (sd.bptr->flags < BBREACHED)) {
2187                                 /* This block has not been reached so far, and we
2188                                    don't fall into it, so we'll have to iterate
2189                                    again. */
2190
2191                                 sd.repeat = true;
2192                                 continue;
2193                         }
2194
2195                         if (sd.bptr->flags > BBREACHED) {
2196                                 /* This block is already finished. */
2197
2198                                 superblockend = true;
2199                                 continue;
2200                         }
2201
2202                         if (sd.bptr->original && sd.bptr->original->flags < BBFINISHED) {
2203                                 /* This block is a clone and the original has not been
2204                                    analysed, yet. Analyse it on the next
2205                                    iteration. */
2206
2207                                 sd.repeat = true;
2208                                 /* XXX superblockend? */
2209                                 continue;
2210                         }
2211
2212                         /* This block has to be analysed now. */
2213
2214                         deadcode = false;
2215
2216                         /* XXX The rest of this block is still indented one level too */
2217                         /* much in order to avoid a giant diff by changing that.      */
2218
2219                                 /* We know that sd.bptr->flags == BBREACHED. */
2220                                 /* This block has been reached before.    */
2221
2222                                 assert(sd.bptr->flags == BBREACHED);
2223                                 stackdepth = sd.bptr->indepth;
2224
2225                                 /* find exception handlers for this block */
2226
2227                                 /* determine the active exception handlers for this block */
2228                                 /* XXX could use a faster algorithm with sorted lists or  */
2229                                 /* something?                                             */
2230
2231                                 original = (sd.bptr->original) ? sd.bptr->original : sd.bptr;
2232
2233                                 len = 0;
2234                                 ex = jd->exceptiontable;
2235                                 for (; ex != NULL; ex = ex->down) {
2236                                         if ((ex->start <= original) && (ex->end > original)) {
2237                                                 sd.handlers[len++] = ex;
2238                                         }
2239                                 }
2240                                 sd.handlers[len] = NULL;
2241
2242
2243                                 /* reanalyse cloned block */
2244
2245                                 if (sd.bptr->original) {
2246                                         if (!stack_reanalyse_block(&sd))
2247                                                 return false;
2248                                         continue;
2249                                 }
2250
2251                                 /* reset the new pointer for allocating stackslots */
2252
2253                                 sd.new = jd->stack;
2254
2255                                 /* create the instack of this block */
2256
2257                                 curstack = stack_create_instack(&sd);
2258
2259                                 /* initialize locals at the start of this block */
2260
2261                                 if (sd.bptr->inlocals)
2262                                         MCOPY(sd.var, sd.bptr->inlocals, varinfo, sd.localcount);
2263
2264                                 MCOPY(sd.javalocals, sd.bptr->javalocals, s4, sd.maxlocals);
2265
2266                                 /* set up local variables for analyzing this block */
2267
2268                                 superblockend = false;
2269                                 len = sd.bptr->icount;
2270                                 iptr = sd.bptr->iinstr;
2271
2272                                 /* mark the block as analysed */
2273
2274                                 sd.bptr->flags = BBFINISHED;
2275
2276                                 /* reset variables for dependency checking */
2277
2278                                 coalescing_boundary = sd.new;
2279                                 for( i = 0; i < m->maxlocals; i++)
2280                                         last_store_boundary[i] = sd.new;
2281
2282                                 /* remember the start of this block's variables */
2283
2284                                 sd.bptr->varstart = sd.vartop;
2285
2286 #if defined(STACK_VERBOSE)
2287                                 stack_verbose_block_enter(&sd, false);
2288 #endif
2289
2290                                 /* reach exception handlers for this block */
2291
2292                                 if (!stack_reach_handlers(&sd))
2293                                         return false;
2294
2295                                 /* iterate over ICMDs ****************************************/
2296
2297                                 while (--len >= 0)  {
2298
2299 #if defined(STACK_VERBOSE)
2300                                         stack_verbose_show_state(&sd, iptr, curstack);
2301 #endif
2302
2303                                         /* fetch the current opcode */
2304
2305                                         opcode = iptr->opc;
2306
2307                                         /* automatically replace some ICMDs with builtins */
2308
2309                                         bte = builtintable_get_automatic(opcode);
2310
2311                                         if ((bte != NULL) && (bte->opcode == opcode)) {
2312                                                 iptr->opc            = ICMD_BUILTIN;
2313                                                 iptr->flags.bits    &= INS_FLAG_ID_MASK;
2314                                                 iptr->sx.s23.s3.bte  = bte;
2315                                                 /* iptr->line is already set */
2316                                                 jd->isleafmethod     = false;
2317                                                 goto icmd_BUILTIN;
2318                                         }
2319
2320                                         /* main opcode switch *************************************/
2321
2322                                         switch (opcode) {
2323
2324                                                 /* pop 0 push 0 */
2325
2326                                         case ICMD_NOP:
2327 icmd_NOP:
2328                                                 CLR_SX;
2329                                                 OP0_0;
2330                                                 break;
2331
2332                                         case ICMD_CHECKNULL:
2333                                                 coalescing_boundary = sd.new;
2334                                                 COUNT(count_check_null);
2335                                                 USE_S1(TYPE_ADR);
2336                                                 CLR_SX;
2337                                                 iptr->dst.varindex = iptr->s1.varindex;
2338                                                 break;
2339
2340                                         case ICMD_RET:
2341                                                 varindex = iptr->s1.varindex =
2342                                                         jd->local_map[iptr->s1.varindex * 5 + TYPE_ADR];
2343
2344 #if defined(ENABLE_VERIFIER)
2345                                                 if (sd.var[varindex].type != TYPE_RET) {
2346                                                         exceptions_throw_verifyerror(m, "RET with non-returnAddress value");
2347                                                         return false;
2348                                                 }
2349 #endif
2350
2351                                                 CLR_SX;
2352
2353                                                 iptr->dst.block = stack_mark_reached(&sd, sd.var[varindex].vv.retaddr, curstack, stackdepth);
2354                                                 superblockend = true;
2355                                                 break;
2356
2357                                         case ICMD_RETURN:
2358                                                 COUNT(count_pcmd_return);
2359                                                 CLR_SX;
2360                                                 OP0_0;
2361                                                 superblockend = true;
2362                                                 sd.jd->returncount++;
2363                                                 sd.jd->returnblock = sd.bptr;
2364                                                 break;
2365
2366
2367                                                 /* pop 0 push 1 const */
2368
2369         /************************** ICONST OPTIMIZATIONS **************************/
2370
2371                                         case ICMD_ICONST:
2372                                                 COUNT(count_pcmd_load);
2373                                                 if (len == 0)
2374                                                         goto normal_ICONST;
2375
2376                                                 switch (iptr[1].opc) {
2377                                                         case ICMD_IADD:
2378                                                                 iptr->opc = ICMD_IADDCONST;
2379                                                                 /* FALLTHROUGH */
2380
2381                                                         icmd_iconst_tail:
2382                                                                 iptr[1].opc = ICMD_NOP;
2383                                                                 OP1_1(TYPE_INT, TYPE_INT);
2384                                                                 COUNT(count_pcmd_op);
2385                                                                 break;
2386
2387                                                         case ICMD_ISUB:
2388                                                                 iptr->opc = ICMD_ISUBCONST;
2389                                                                 goto icmd_iconst_tail;
2390 #if SUPPORT_CONST_MUL
2391                                                         case ICMD_IMUL:
2392                                                                 iptr->opc = ICMD_IMULCONST;
2393                                                                 goto icmd_iconst_tail;
2394 #else /* SUPPORT_CONST_MUL */
2395                                                         case ICMD_IMUL:
2396                                                                 if (iptr->sx.val.i == 0x00000002)
2397                                                                         iptr->sx.val.i = 1;
2398                                                                 else if (iptr->sx.val.i == 0x00000004)
2399                                                                         iptr->sx.val.i = 2;
2400                                                                 else if (iptr->sx.val.i == 0x00000008)
2401                                                                         iptr->sx.val.i = 3;
2402                                                                 else if (iptr->sx.val.i == 0x00000010)
2403                                                                         iptr->sx.val.i = 4;
2404                                                                 else if (iptr->sx.val.i == 0x00000020)
2405                                                                         iptr->sx.val.i = 5;
2406                                                                 else if (iptr->sx.val.i == 0x00000040)
2407                                                                         iptr->sx.val.i = 6;
2408                                                                 else if (iptr->sx.val.i == 0x00000080)
2409                                                                         iptr->sx.val.i = 7;
2410                                                                 else if (iptr->sx.val.i == 0x00000100)
2411                                                                         iptr->sx.val.i = 8;
2412                                                                 else if (iptr->sx.val.i == 0x00000200)
2413                                                                         iptr->sx.val.i = 9;
2414                                                                 else if (iptr->sx.val.i == 0x00000400)
2415                                                                         iptr->sx.val.i = 10;
2416                                                                 else if (iptr->sx.val.i == 0x00000800)
2417                                                                         iptr->sx.val.i = 11;
2418                                                                 else if (iptr->sx.val.i == 0x00001000)
2419                                                                         iptr->sx.val.i = 12;
2420                                                                 else if (iptr->sx.val.i == 0x00002000)
2421                                                                         iptr->sx.val.i = 13;
2422                                                                 else if (iptr->sx.val.i == 0x00004000)
2423                                                                         iptr->sx.val.i = 14;
2424                                                                 else if (iptr->sx.val.i == 0x00008000)
2425                                                                         iptr->sx.val.i = 15;
2426                                                                 else if (iptr->sx.val.i == 0x00010000)
2427                                                                         iptr->sx.val.i = 16;
2428                                                                 else if (iptr->sx.val.i == 0x00020000)
2429                                                                         iptr->sx.val.i = 17;
2430                                                                 else if (iptr->sx.val.i == 0x00040000)
2431                                                                         iptr->sx.val.i = 18;
2432                                                                 else if (iptr->sx.val.i == 0x00080000)
2433                                                                         iptr->sx.val.i = 19;
2434                                                                 else if (iptr->sx.val.i == 0x00100000)
2435                                                                         iptr->sx.val.i = 20;
2436                                                                 else if (iptr->sx.val.i == 0x00200000)
2437                                                                         iptr->sx.val.i = 21;
2438                                                                 else if (iptr->sx.val.i == 0x00400000)
2439                                                                         iptr->sx.val.i = 22;
2440                                                                 else if (iptr->sx.val.i == 0x00800000)
2441                                                                         iptr->sx.val.i = 23;
2442                                                                 else if (iptr->sx.val.i == 0x01000000)
2443                                                                         iptr->sx.val.i = 24;
2444                                                                 else if (iptr->sx.val.i == 0x02000000)
2445                                                                         iptr->sx.val.i = 25;
2446                                                                 else if (iptr->sx.val.i == 0x04000000)
2447                                                                         iptr->sx.val.i = 26;
2448                                                                 else if (iptr->sx.val.i == 0x08000000)
2449                                                                         iptr->sx.val.i = 27;
2450                                                                 else if (iptr->sx.val.i == 0x10000000)
2451                                                                         iptr->sx.val.i = 28;
2452                                                                 else if (iptr->sx.val.i == 0x20000000)
2453                                                                         iptr->sx.val.i = 29;
2454                                                                 else if (iptr->sx.val.i == 0x40000000)
2455                                                                         iptr->sx.val.i = 30;
2456                                                                 else if (iptr->sx.val.i == 0x80000000)
2457                                                                         iptr->sx.val.i = 31;
2458                                                                 else
2459                                                                         goto normal_ICONST;
2460
2461                                                                 iptr->opc = ICMD_IMULPOW2;
2462                                                                 goto icmd_iconst_tail;
2463 #endif /* SUPPORT_CONST_MUL */
2464                                                         case ICMD_IDIV:
2465                                                                 if (iptr->sx.val.i == 0x00000002)
2466                                                                         iptr->sx.val.i = 1;
2467                                                                 else if (iptr->sx.val.i == 0x00000004)
2468                                                                         iptr->sx.val.i = 2;
2469                                                                 else if (iptr->sx.val.i == 0x00000008)
2470                                                                         iptr->sx.val.i = 3;
2471                                                                 else if (iptr->sx.val.i == 0x00000010)
2472                                                                         iptr->sx.val.i = 4;
2473                                                                 else if (iptr->sx.val.i == 0x00000020)
2474                                                                         iptr->sx.val.i = 5;
2475                                                                 else if (iptr->sx.val.i == 0x00000040)
2476                                                                         iptr->sx.val.i = 6;
2477                                                                 else if (iptr->sx.val.i == 0x00000080)
2478                                                                         iptr->sx.val.i = 7;
2479                                                                 else if (iptr->sx.val.i == 0x00000100)
2480                                                                         iptr->sx.val.i = 8;
2481                                                                 else if (iptr->sx.val.i == 0x00000200)
2482                                                                         iptr->sx.val.i = 9;
2483                                                                 else if (iptr->sx.val.i == 0x00000400)
2484                                                                         iptr->sx.val.i = 10;
2485                                                                 else if (iptr->sx.val.i == 0x00000800)
2486                                                                         iptr->sx.val.i = 11;
2487                                                                 else if (iptr->sx.val.i == 0x00001000)
2488                                                                         iptr->sx.val.i = 12;
2489                                                                 else if (iptr->sx.val.i == 0x00002000)
2490                                                                         iptr->sx.val.i = 13;
2491                                                                 else if (iptr->sx.val.i == 0x00004000)
2492                                                                         iptr->sx.val.i = 14;
2493                                                                 else if (iptr->sx.val.i == 0x00008000)
2494                                                                         iptr->sx.val.i = 15;
2495                                                                 else if (iptr->sx.val.i == 0x00010000)
2496                                                                         iptr->sx.val.i = 16;
2497                                                                 else if (iptr->sx.val.i == 0x00020000)
2498                                                                         iptr->sx.val.i = 17;
2499                                                                 else if (iptr->sx.val.i == 0x00040000)
2500                                                                         iptr->sx.val.i = 18;
2501                                                                 else if (iptr->sx.val.i == 0x00080000)
2502                                                                         iptr->sx.val.i = 19;
2503                                                                 else if (iptr->sx.val.i == 0x00100000)
2504                                                                         iptr->sx.val.i = 20;
2505                                                                 else if (iptr->sx.val.i == 0x00200000)
2506                                                                         iptr->sx.val.i = 21;
2507                                                                 else if (iptr->sx.val.i == 0x00400000)
2508                                                                         iptr->sx.val.i = 22;
2509                                                                 else if (iptr->sx.val.i == 0x00800000)
2510                                                                         iptr->sx.val.i = 23;
2511                                                                 else if (iptr->sx.val.i == 0x01000000)
2512                                                                         iptr->sx.val.i = 24;
2513                                                                 else if (iptr->sx.val.i == 0x02000000)
2514                                                                         iptr->sx.val.i = 25;
2515                                                                 else if (iptr->sx.val.i == 0x04000000)
2516                                                                         iptr->sx.val.i = 26;
2517                                                                 else if (iptr->sx.val.i == 0x08000000)
2518                                                                         iptr->sx.val.i = 27;
2519                                                                 else if (iptr->sx.val.i == 0x10000000)
2520                                                                         iptr->sx.val.i = 28;
2521                                                                 else if (iptr->sx.val.i == 0x20000000)
2522                                                                         iptr->sx.val.i = 29;
2523                                                                 else if (iptr->sx.val.i == 0x40000000)
2524                                                                         iptr->sx.val.i = 30;
2525                                                                 else if (iptr->sx.val.i == 0x80000000)
2526                                                                         iptr->sx.val.i = 31;
2527                                                                 else
2528                                                                         goto normal_ICONST;
2529
2530                                                                 iptr->opc = ICMD_IDIVPOW2;
2531                                                                 goto icmd_iconst_tail;
2532
2533                                                         case ICMD_IREM:
2534                                                                 /*log_text("stack.c: ICMD_ICONST/ICMD_IREM");*/
2535                                                                 if ((iptr->sx.val.i == 0x00000002) ||
2536                                                                         (iptr->sx.val.i == 0x00000004) ||
2537                                                                         (iptr->sx.val.i == 0x00000008) ||
2538                                                                         (iptr->sx.val.i == 0x00000010) ||
2539                                                                         (iptr->sx.val.i == 0x00000020) ||
2540                                                                         (iptr->sx.val.i == 0x00000040) ||
2541                                                                         (iptr->sx.val.i == 0x00000080) ||
2542                                                                         (iptr->sx.val.i == 0x00000100) ||
2543                                                                         (iptr->sx.val.i == 0x00000200) ||
2544                                                                         (iptr->sx.val.i == 0x00000400) ||
2545                                                                         (iptr->sx.val.i == 0x00000800) ||
2546                                                                         (iptr->sx.val.i == 0x00001000) ||
2547                                                                         (iptr->sx.val.i == 0x00002000) ||
2548                                                                         (iptr->sx.val.i == 0x00004000) ||
2549                                                                         (iptr->sx.val.i == 0x00008000) ||
2550                                                                         (iptr->sx.val.i == 0x00010000) ||
2551                                                                         (iptr->sx.val.i == 0x00020000) ||
2552                                                                         (iptr->sx.val.i == 0x00040000) ||
2553                                                                         (iptr->sx.val.i == 0x00080000) ||
2554                                                                         (iptr->sx.val.i == 0x00100000) ||
2555                                                                         (iptr->sx.val.i == 0x00200000) ||
2556                                                                         (iptr->sx.val.i == 0x00400000) ||
2557                                                                         (iptr->sx.val.i == 0x00800000) ||
2558                                                                         (iptr->sx.val.i == 0x01000000) ||
2559                                                                         (iptr->sx.val.i == 0x02000000) ||
2560                                                                         (iptr->sx.val.i == 0x04000000) ||
2561                                                                         (iptr->sx.val.i == 0x08000000) ||
2562                                                                         (iptr->sx.val.i == 0x10000000) ||
2563                                                                         (iptr->sx.val.i == 0x20000000) ||
2564                                                                         (iptr->sx.val.i == 0x40000000) ||
2565                                                                         (iptr->sx.val.i == 0x80000000))
2566                                                                 {
2567                                                                         iptr->opc = ICMD_IREMPOW2;
2568                                                                         iptr->sx.val.i -= 1;
2569                                                                         goto icmd_iconst_tail;
2570                                                                 }
2571                                                                 goto normal_ICONST;
2572 #if SUPPORT_CONST_LOGICAL
2573                                                         case ICMD_IAND:
2574                                                                 iptr->opc = ICMD_IANDCONST;
2575                                                                 goto icmd_iconst_tail;
2576
2577                                                         case ICMD_IOR:
2578                                                                 iptr->opc = ICMD_IORCONST;
2579                                                                 goto icmd_iconst_tail;
2580
2581                                                         case ICMD_IXOR:
2582                                                                 iptr->opc = ICMD_IXORCONST;
2583                                                                 goto icmd_iconst_tail;
2584
2585 #endif /* SUPPORT_CONST_LOGICAL */
2586                                                         case ICMD_ISHL:
2587                                                                 iptr->opc = ICMD_ISHLCONST;
2588                                                                 goto icmd_iconst_tail;
2589
2590                                                         case ICMD_ISHR:
2591                                                                 iptr->opc = ICMD_ISHRCONST;
2592                                                                 goto icmd_iconst_tail;
2593
2594                                                         case ICMD_IUSHR:
2595                                                                 iptr->opc = ICMD_IUSHRCONST;
2596                                                                 goto icmd_iconst_tail;
2597 #if SUPPORT_LONG_SHIFT
2598                                                         case ICMD_LSHL:
2599                                                                 iptr->opc = ICMD_LSHLCONST;
2600                                                                 goto icmd_lconst_tail;
2601
2602                                                         case ICMD_LSHR:
2603                                                                 iptr->opc = ICMD_LSHRCONST;
2604                                                                 goto icmd_lconst_tail;
2605
2606                                                         case ICMD_LUSHR:
2607                                                                 iptr->opc = ICMD_LUSHRCONST;
2608                                                                 goto icmd_lconst_tail;
2609 #endif /* SUPPORT_LONG_SHIFT */
2610                                                         case ICMD_IF_ICMPEQ:
2611                                                                 iptr[1].opc = ICMD_IFEQ;
2612                                                                 /* FALLTHROUGH */
2613
2614                                                         icmd_if_icmp_tail:
2615                                                                 /* set the constant for the following icmd */
2616                                                                 iptr[1].sx.val.i = iptr->sx.val.i;
2617
2618                                                                 /* this instruction becomes a nop */
2619                                                                 iptr->opc = ICMD_NOP;
2620                                                                 goto icmd_NOP;
2621
2622                                                         case ICMD_IF_ICMPLT:
2623                                                                 iptr[1].opc = ICMD_IFLT;
2624                                                                 goto icmd_if_icmp_tail;
2625
2626                                                         case ICMD_IF_ICMPLE:
2627                                                                 iptr[1].opc = ICMD_IFLE;
2628                                                                 goto icmd_if_icmp_tail;
2629
2630                                                         case ICMD_IF_ICMPNE:
2631                                                                 iptr[1].opc = ICMD_IFNE;
2632                                                                 goto icmd_if_icmp_tail;
2633
2634                                                         case ICMD_IF_ICMPGT:
2635                                                                 iptr[1].opc = ICMD_IFGT;
2636                                                                 goto icmd_if_icmp_tail;
2637
2638                                                         case ICMD_IF_ICMPGE:
2639                                                                 iptr[1].opc = ICMD_IFGE;
2640                                                                 goto icmd_if_icmp_tail;
2641
2642 #if SUPPORT_CONST_STORE
2643                                                         case ICMD_IASTORE:
2644                                                         case ICMD_BASTORE:
2645                                                         case ICMD_CASTORE:
2646                                                         case ICMD_SASTORE:
2647 # if SUPPORT_CONST_STORE_ZERO_ONLY
2648                                                                 if (iptr->sx.val.i != 0)
2649                                                                         goto normal_ICONST;
2650 # endif
2651                                                                 switch (iptr[1].opc) {
2652                                                                         case ICMD_IASTORE:
2653                                                                                 iptr->opc = ICMD_IASTORECONST;
2654                                                                                 iptr->flags.bits |= INS_FLAG_CHECK;
2655                                                                                 break;
2656                                                                         case ICMD_BASTORE:
2657                                                                                 iptr->opc = ICMD_BASTORECONST;
2658                                                                                 iptr->flags.bits |= INS_FLAG_CHECK;
2659                                                                                 break;
2660                                                                         case ICMD_CASTORE:
2661                                                                                 iptr->opc = ICMD_CASTORECONST;
2662                                                                                 iptr->flags.bits |= INS_FLAG_CHECK;
2663                                                                                 break;
2664                                                                         case ICMD_SASTORE:
2665                                                                                 iptr->opc = ICMD_SASTORECONST;
2666                                                                                 iptr->flags.bits |= INS_FLAG_CHECK;
2667                                                                                 break;
2668                                                                 }
2669
2670                                                                 iptr[1].opc = ICMD_NOP;
2671
2672                                                                 /* copy the constant to s3 */
2673                                                                 /* XXX constval -> astoreconstval? */
2674                                                                 iptr->sx.s23.s3.constval = iptr->sx.val.i;
2675                                                                 OP2_0(TYPE_ADR, TYPE_INT);
2676                                                                 COUNT(count_pcmd_op);
2677                                                                 break;
2678
2679                                                         case ICMD_PUTSTATIC:
2680                                                         case ICMD_PUTFIELD:
2681 # if SUPPORT_CONST_STORE_ZERO_ONLY
2682                                                                 if (iptr->sx.val.i != 0)
2683                                                                         goto normal_ICONST;
2684 # endif
2685                                                                 /* XXX check field type? */
2686
2687                                                                 /* copy the constant to s2 */
2688                                                                 /* XXX constval -> fieldconstval? */
2689                                                                 iptr->sx.s23.s2.constval = iptr->sx.val.i;
2690
2691 putconst_tail:
2692                                                                 /* set the field reference (s3) */
2693                                                                 if (iptr[1].flags.bits & INS_FLAG_UNRESOLVED) {
2694                                                                         iptr->sx.s23.s3.uf = iptr[1].sx.s23.s3.uf;
2695                                                                         iptr->flags.bits |= INS_FLAG_UNRESOLVED;
2696                                                                         fmiref = iptr->sx.s23.s3.uf->fieldref;
2697                                                                 }
2698                                                                 else {
2699                                                                         fmiref = iptr[1].sx.s23.s3.fmiref;
2700                                                                         iptr->sx.s23.s3.fmiref = fmiref;
2701                                                                 }
2702
2703 #if defined(ENABLE_VERIFIER)
2704                                                                 expectedtype = fmiref->parseddesc.fd->type;
2705                                                                 switch (iptr[0].opc) {
2706                                                                         case ICMD_ICONST:
2707                                                                                 if (expectedtype != TYPE_INT)
2708                                                                                         goto throw_stack_type_error;
2709                                                                                 break;
2710                                                                         case ICMD_LCONST:
2711                                                                                 if (expectedtype != TYPE_LNG)
2712                                                                                         goto throw_stack_type_error;
2713                                                                                 break;
2714                                                                         case ICMD_ACONST:
2715                                                                                 if (expectedtype != TYPE_ADR)
2716                                                                                         goto throw_stack_type_error;
2717                                                                                 break;
2718                                                                         default:
2719                                                                                 assert(0);
2720                                                                 }
2721 #endif /* defined(ENABLE_VERIFIER) */
2722
2723                                                                 switch (iptr[1].opc) {
2724                                                                         case ICMD_PUTSTATIC:
2725                                                                                 iptr->opc = ICMD_PUTSTATICCONST;
2726                                                                                 OP0_0;
2727                                                                                 break;
2728                                                                         case ICMD_PUTFIELD:
2729                                                                                 iptr->opc = ICMD_PUTFIELDCONST;
2730                                                                                 OP1_0(TYPE_ADR);
2731                                                                                 break;
2732                                                                 }
2733
2734                                                                 iptr[1].opc = ICMD_NOP;
2735                                                                 COUNT(count_pcmd_op);
2736                                                                 break;
2737 #endif /* SUPPORT_CONST_STORE */
2738
2739                                                         default:
2740                                                                 goto normal_ICONST;
2741                                                 }
2742
2743                                                 /* if we get here, the ICONST has been optimized */
2744                                                 break;
2745
2746 normal_ICONST:
2747                                                 /* normal case of an unoptimized ICONST */
2748                                                 OP0_1(TYPE_INT);
2749                                                 break;
2750
2751         /************************** LCONST OPTIMIZATIONS **************************/
2752
2753                                         case ICMD_LCONST:
2754                                                 COUNT(count_pcmd_load);
2755                                                 if (len == 0)
2756                                                         goto normal_LCONST;
2757
2758                                                 /* switch depending on the following instruction */
2759
2760                                                 switch (iptr[1].opc) {
2761 #if SUPPORT_LONG_ADD
2762                                                         case ICMD_LADD:
2763                                                                 iptr->opc = ICMD_LADDCONST;
2764                                                                 /* FALLTHROUGH */
2765
2766                                                         icmd_lconst_tail:
2767                                                                 /* instruction of type LONG -> LONG */
2768                                                                 iptr[1].opc = ICMD_NOP;
2769                                                                 OP1_1(TYPE_LNG, TYPE_LNG);
2770                                                                 COUNT(count_pcmd_op);
2771                                                                 break;
2772
2773                                                         case ICMD_LSUB:
2774                                                                 iptr->opc = ICMD_LSUBCONST;
2775                                                                 goto icmd_lconst_tail;
2776
2777 #endif /* SUPPORT_LONG_ADD */
2778 #if SUPPORT_LONG_MUL && SUPPORT_CONST_MUL
2779                                                         case ICMD_LMUL:
2780                                                                 iptr->opc = ICMD_LMULCONST;
2781                                                                 goto icmd_lconst_tail;
2782 #else /* SUPPORT_LONG_MUL && SUPPORT_CONST_MUL */
2783 # if SUPPORT_LONG_SHIFT
2784                                                         case ICMD_LMUL:
2785                                                                 if (iptr->sx.val.l == 0x00000002)
2786                                                                         iptr->sx.val.i = 1;
2787                                                                 else if (iptr->sx.val.l == 0x00000004)
2788                                                                         iptr->sx.val.i = 2;
2789                                                                 else if (iptr->sx.val.l == 0x00000008)
2790                                                                         iptr->sx.val.i = 3;
2791                                                                 else if (iptr->sx.val.l == 0x00000010)
2792                                                                         iptr->sx.val.i = 4;
2793                                                                 else if (iptr->sx.val.l == 0x00000020)
2794                                                                         iptr->sx.val.i = 5;
2795                                                                 else if (iptr->sx.val.l == 0x00000040)
2796                                                                         iptr->sx.val.i = 6;
2797                                                                 else if (iptr->sx.val.l == 0x00000080)
2798                                                                         iptr->sx.val.i = 7;
2799                                                                 else if (iptr->sx.val.l == 0x00000100)
2800                                                                         iptr->sx.val.i = 8;
2801                                                                 else if (iptr->sx.val.l == 0x00000200)
2802                                                                         iptr->sx.val.i = 9;
2803                                                                 else if (iptr->sx.val.l == 0x00000400)
2804                                                                         iptr->sx.val.i = 10;
2805                                                                 else if (iptr->sx.val.l == 0x00000800)
2806                                                                         iptr->sx.val.i = 11;
2807                                                                 else if (iptr->sx.val.l == 0x00001000)
2808                                                                         iptr->sx.val.i = 12;
2809                                                                 else if (iptr->sx.val.l == 0x00002000)
2810                                                                         iptr->sx.val.i = 13;
2811                                                                 else if (iptr->sx.val.l == 0x00004000)
2812                                                                         iptr->sx.val.i = 14;
2813                                                                 else if (iptr->sx.val.l == 0x00008000)
2814                                                                         iptr->sx.val.i = 15;
2815                                                                 else if (iptr->sx.val.l == 0x00010000)
2816                                                                         iptr->sx.val.i = 16;
2817                                                                 else if (iptr->sx.val.l == 0x00020000)
2818                                                                         iptr->sx.val.i = 17;
2819                                                                 else if (iptr->sx.val.l == 0x00040000)
2820                                                                         iptr->sx.val.i = 18;
2821                                                                 else if (iptr->sx.val.l == 0x00080000)
2822                                                                         iptr->sx.val.i = 19;
2823                                                                 else if (iptr->sx.val.l == 0x00100000)
2824                                                                         iptr->sx.val.i = 20;
2825                                                                 else if (iptr->sx.val.l == 0x00200000)
2826                                                                         iptr->sx.val.i = 21;
2827                                                                 else if (iptr->sx.val.l == 0x00400000)
2828                                                                         iptr->sx.val.i = 22;
2829                                                                 else if (iptr->sx.val.l == 0x00800000)
2830                                                                         iptr->sx.val.i = 23;
2831                                                                 else if (iptr->sx.val.l == 0x01000000)
2832                                                                         iptr->sx.val.i = 24;
2833                                                                 else if (iptr->sx.val.l == 0x02000000)
2834                                                                         iptr->sx.val.i = 25;
2835                                                                 else if (iptr->sx.val.l == 0x04000000)
2836                                                                         iptr->sx.val.i = 26;
2837                                                                 else if (iptr->sx.val.l == 0x08000000)
2838                                                                         iptr->sx.val.i = 27;
2839                                                                 else if (iptr->sx.val.l == 0x10000000)
2840                                                                         iptr->sx.val.i = 28;
2841                                                                 else if (iptr->sx.val.l == 0x20000000)
2842                                                                         iptr->sx.val.i = 29;
2843                                                                 else if (iptr->sx.val.l == 0x40000000)
2844                                                                         iptr->sx.val.i = 30;
2845                                                                 else if (iptr->sx.val.l == 0x80000000)
2846                                                                         iptr->sx.val.i = 31;
2847                                                                 else {
2848                                                                         goto normal_LCONST;
2849                                                                 }
2850                                                                 iptr->opc = ICMD_LMULPOW2;
2851                                                                 goto icmd_lconst_tail;
2852 # endif /* SUPPORT_LONG_SHIFT */
2853 #endif /* SUPPORT_LONG_MUL && SUPPORT_CONST_MUL */
2854 #if SUPPORT_LONG_DIV_POW2
2855                                                         case ICMD_LDIV:
2856                                                                 if (iptr->sx.val.l == 0x00000002)
2857                                                                         iptr->sx.val.i = 1;
2858                                                                 else if (iptr->sx.val.l == 0x00000004)
2859                                                                         iptr->sx.val.i = 2;
2860                                                                 else if (iptr->sx.val.l == 0x00000008)
2861                                                                         iptr->sx.val.i = 3;
2862                                                                 else if (iptr->sx.val.l == 0x00000010)
2863                                                                         iptr->sx.val.i = 4;
2864                                                                 else if (iptr->sx.val.l == 0x00000020)
2865                                                                         iptr->sx.val.i = 5;
2866                                                                 else if (iptr->sx.val.l == 0x00000040)
2867                                                                         iptr->sx.val.i = 6;
2868                                                                 else if (iptr->sx.val.l == 0x00000080)
2869                                                                         iptr->sx.val.i = 7;
2870                                                                 else if (iptr->sx.val.l == 0x00000100)
2871                                                                         iptr->sx.val.i = 8;
2872                                                                 else if (iptr->sx.val.l == 0x00000200)
2873                                                                         iptr->sx.val.i = 9;
2874                                                                 else if (iptr->sx.val.l == 0x00000400)
2875                                                                         iptr->sx.val.i = 10;
2876                                                                 else if (iptr->sx.val.l == 0x00000800)
2877                                                                         iptr->sx.val.i = 11;
2878                                                                 else if (iptr->sx.val.l == 0x00001000)
2879                                                                         iptr->sx.val.i = 12;
2880                                                                 else if (iptr->sx.val.l == 0x00002000)
2881                                                                         iptr->sx.val.i = 13;
2882                                                                 else if (iptr->sx.val.l == 0x00004000)
2883                                                                         iptr->sx.val.i = 14;
2884                                                                 else if (iptr->sx.val.l == 0x00008000)
2885                                                                         iptr->sx.val.i = 15;
2886                                                                 else if (iptr->sx.val.l == 0x00010000)
2887                                                                         iptr->sx.val.i = 16;
2888                                                                 else if (iptr->sx.val.l == 0x00020000)
2889                                                                         iptr->sx.val.i = 17;
2890                                                                 else if (iptr->sx.val.l == 0x00040000)
2891                                                                         iptr->sx.val.i = 18;
2892                                                                 else if (iptr->sx.val.l == 0x00080000)
2893                                                                         iptr->sx.val.i = 19;
2894                                                                 else if (iptr->sx.val.l == 0x00100000)
2895                                                                         iptr->sx.val.i = 20;
2896                                                                 else if (iptr->sx.val.l == 0x00200000)
2897                                                                         iptr->sx.val.i = 21;
2898                                                                 else if (iptr->sx.val.l == 0x00400000)
2899                                                                         iptr->sx.val.i = 22;
2900                                                                 else if (iptr->sx.val.l == 0x00800000)
2901                                                                         iptr->sx.val.i = 23;
2902                                                                 else if (iptr->sx.val.l == 0x01000000)
2903                                                                         iptr->sx.val.i = 24;
2904                                                                 else if (iptr->sx.val.l == 0x02000000)
2905                                                                         iptr->sx.val.i = 25;
2906                                                                 else if (iptr->sx.val.l == 0x04000000)
2907                                                                         iptr->sx.val.i = 26;
2908                                                                 else if (iptr->sx.val.l == 0x08000000)
2909                                                                         iptr->sx.val.i = 27;
2910                                                                 else if (iptr->sx.val.l == 0x10000000)
2911                                                                         iptr->sx.val.i = 28;
2912                                                                 else if (iptr->sx.val.l == 0x20000000)
2913                                                                         iptr->sx.val.i = 29;
2914                                                                 else if (iptr->sx.val.l == 0x40000000)
2915                                                                         iptr->sx.val.i = 30;
2916                                                                 else if (iptr->sx.val.l == 0x80000000)
2917                                                                         iptr->sx.val.i = 31;
2918                                                                 else {
2919                                                                         goto normal_LCONST;
2920                                                                 }
2921                                                                 iptr->opc = ICMD_LDIVPOW2;
2922                                                                 goto icmd_lconst_tail;
2923 #endif /* SUPPORT_LONG_DIV_POW2 */
2924
2925 #if SUPPORT_LONG_REM_POW2
2926                                                         case ICMD_LREM:
2927                                                                 if ((iptr->sx.val.l == 0x00000002) ||
2928                                                                         (iptr->sx.val.l == 0x00000004) ||
2929                                                                         (iptr->sx.val.l == 0x00000008) ||
2930                                                                         (iptr->sx.val.l == 0x00000010) ||
2931                                                                         (iptr->sx.val.l == 0x00000020) ||
2932                                                                         (iptr->sx.val.l == 0x00000040) ||
2933                                                                         (iptr->sx.val.l == 0x00000080) ||
2934                                                                         (iptr->sx.val.l == 0x00000100) ||
2935                                                                         (iptr->sx.val.l == 0x00000200) ||
2936                                                                         (iptr->sx.val.l == 0x00000400) ||
2937                                                                         (iptr->sx.val.l == 0x00000800) ||
2938                                                                         (iptr->sx.val.l == 0x00001000) ||
2939                                                                         (iptr->sx.val.l == 0x00002000) ||
2940                                                                         (iptr->sx.val.l == 0x00004000) ||
2941                                                                         (iptr->sx.val.l == 0x00008000) ||
2942                                                                         (iptr->sx.val.l == 0x00010000) ||
2943                                                                         (iptr->sx.val.l == 0x00020000) ||
2944                                                                         (iptr->sx.val.l == 0x00040000) ||
2945                                                                         (iptr->sx.val.l == 0x00080000) ||
2946                                                                         (iptr->sx.val.l == 0x00100000) ||
2947                                                                         (iptr->sx.val.l == 0x00200000) ||
2948                                                                         (iptr->sx.val.l == 0x00400000) ||
2949                                                                         (iptr->sx.val.l == 0x00800000) ||
2950                                                                         (iptr->sx.val.l == 0x01000000) ||
2951                                                                         (iptr->sx.val.l == 0x02000000) ||
2952                                                                         (iptr->sx.val.l == 0x04000000) ||
2953                                                                         (iptr->sx.val.l == 0x08000000) ||
2954                                                                         (iptr->sx.val.l == 0x10000000) ||
2955                                                                         (iptr->sx.val.l == 0x20000000) ||
2956                                                                         (iptr->sx.val.l == 0x40000000) ||
2957                                                                         (iptr->sx.val.l == 0x80000000))
2958                                                                 {
2959                                                                         iptr->opc = ICMD_LREMPOW2;
2960                                                                         iptr->sx.val.l -= 1;
2961                                                                         goto icmd_lconst_tail;
2962                                                                 }
2963                                                                 goto normal_LCONST;
2964 #endif /* SUPPORT_LONG_REM_POW2 */
2965
2966 #if SUPPORT_LONG_LOGICAL && SUPPORT_CONST_LOGICAL
2967
2968                                                         case ICMD_LAND:
2969                                                                 iptr->opc = ICMD_LANDCONST;
2970                                                                 goto icmd_lconst_tail;
2971
2972                                                         case ICMD_LOR:
2973                                                                 iptr->opc = ICMD_LORCONST;
2974                                                                 goto icmd_lconst_tail;
2975
2976                                                         case ICMD_LXOR:
2977                                                                 iptr->opc = ICMD_LXORCONST;
2978                                                                 goto icmd_lconst_tail;
2979 #endif /* SUPPORT_LONG_LOGICAL && SUPPORT_CONST_LOGICAL */
2980
2981 #if SUPPORT_LONG_CMP_CONST
2982                                                         case ICMD_LCMP:
2983                                                                 if ((len <= 1) || (iptr[2].sx.val.i != 0))
2984                                                                         goto normal_LCONST;
2985
2986                                                                 /* switch on the instruction after LCONST - LCMP */
2987
2988                                                                 switch (iptr[2].opc) {
2989                                                                         case ICMD_IFEQ:
2990                                                                                 iptr->opc = ICMD_IF_LEQ;
2991                                                                                 /* FALLTHROUGH */
2992
2993                                                                         icmd_lconst_lcmp_tail:
2994                                                                                 /* convert LCONST, LCMP, IFXX to IF_LXX */
2995                                                                                 iptr->dst.block = iptr[2].dst.block;
2996                                                                                 iptr[1].opc = ICMD_NOP;
2997                                                                                 iptr[2].opc = ICMD_NOP;
2998
2999                                                                                 OP1_BRANCH(TYPE_LNG);
3000                                                                                 BRANCH(tbptr);
3001                                                                                 COUNT(count_pcmd_bra);
3002                                                                                 COUNT(count_pcmd_op);
3003                                                                                 break;
3004
3005                                                                         case ICMD_IFNE:
3006                                                                                 iptr->opc = ICMD_IF_LNE;
3007                                                                                 goto icmd_lconst_lcmp_tail;
3008
3009                                                                         case ICMD_IFLT:
3010                                                                                 iptr->opc = ICMD_IF_LLT;
3011                                                                                 goto icmd_lconst_lcmp_tail;
3012
3013                                                                         case ICMD_IFGT:
3014                                                                                 iptr->opc = ICMD_IF_LGT;
3015                                                                                 goto icmd_lconst_lcmp_tail;
3016
3017                                                                         case ICMD_IFLE:
3018                                                                                 iptr->opc = ICMD_IF_LLE;
3019                                                                                 goto icmd_lconst_lcmp_tail;
3020
3021                                                                         case ICMD_IFGE:
3022                                                                                 iptr->opc = ICMD_IF_LGE;
3023                                                                                 goto icmd_lconst_lcmp_tail;
3024
3025                                                                         default:
3026                                                                                 goto normal_LCONST;
3027                                                                 } /* end switch on opcode after LCONST - LCMP */
3028                                                                 break;
3029 #endif /* SUPPORT_LONG_CMP_CONST */
3030
3031 #if SUPPORT_CONST_STORE
3032                                                         case ICMD_LASTORE:
3033 # if SUPPORT_CONST_STORE_ZERO_ONLY
3034                                                                 if (iptr->sx.val.l != 0)
3035                                                                         goto normal_LCONST;
3036 # endif
3037 #if SIZEOF_VOID_P == 4
3038                                                                 /* the constant must fit into a ptrint */
3039                                                                 if (iptr->sx.val.l < -0x80000000L || iptr->sx.val.l >= 0x80000000L)
3040                                                                         goto normal_LCONST;
3041 #endif
3042                                                                 /* move the constant to s3 */
3043                                                                 iptr->sx.s23.s3.constval = iptr->sx.val.l;
3044
3045                                                                 iptr->opc = ICMD_LASTORECONST;
3046                                                                 iptr->flags.bits |= INS_FLAG_CHECK;
3047                                                                 OP2_0(TYPE_ADR, TYPE_INT);
3048
3049                                                                 iptr[1].opc = ICMD_NOP;
3050                                                                 COUNT(count_pcmd_op);
3051                                                                 break;
3052
3053                                                         case ICMD_PUTSTATIC:
3054                                                         case ICMD_PUTFIELD:
3055 # if SUPPORT_CONST_STORE_ZERO_ONLY
3056                                                                 if (iptr->sx.val.l != 0)
3057                                                                         goto normal_LCONST;
3058 # endif
3059 #if SIZEOF_VOID_P == 4
3060                                                                 /* the constant must fit into a ptrint */
3061                                                                 if (iptr->sx.val.l < -0x80000000L || iptr->sx.val.l >= 0x80000000L)
3062                                                                         goto normal_LCONST;
3063 #endif
3064                                                                 /* XXX check field type? */
3065
3066                                                                 /* copy the constant to s2 */
3067                                                                 /* XXX constval -> fieldconstval? */
3068                                                                 iptr->sx.s23.s2.constval = iptr->sx.val.l;
3069
3070                                                                 goto putconst_tail;
3071
3072 #endif /* SUPPORT_CONST_STORE */
3073
3074                                                         default:
3075                                                                 goto normal_LCONST;
3076                                                 } /* end switch opcode after LCONST */
3077
3078                                                 /* if we get here, the LCONST has been optimized */
3079                                                 break;
3080
3081 normal_LCONST:
3082                                                 /* the normal case of an unoptimized LCONST */
3083                                                 OP0_1(TYPE_LNG);
3084                                                 break;
3085
3086         /************************ END OF LCONST OPTIMIZATIONS *********************/
3087
3088                                         case ICMD_FCONST:
3089                                                 COUNT(count_pcmd_load);
3090                                                 OP0_1(TYPE_FLT);
3091                                                 break;
3092
3093                                         case ICMD_DCONST:
3094                                                 COUNT(count_pcmd_load);
3095                                                 OP0_1(TYPE_DBL);
3096                                                 break;
3097
3098         /************************** ACONST OPTIMIZATIONS **************************/
3099
3100                                         case ICMD_ACONST:
3101                                                 coalescing_boundary = sd.new;
3102                                                 COUNT(count_pcmd_load);
3103 #if SUPPORT_CONST_STORE
3104                                                 /* We can only optimize if the ACONST is resolved
3105                                                  * and there is an instruction after it. */
3106
3107                                                 if ((len == 0) || (iptr->flags.bits & INS_FLAG_UNRESOLVED))
3108                                                         goto normal_ACONST;
3109
3110                                                 switch (iptr[1].opc) {
3111                                                         case ICMD_AASTORE:
3112                                                                 /* We can only optimize for NULL values
3113                                                                  * here because otherwise a checkcast is
3114                                                                  * required. */
3115                                                                 if (iptr->sx.val.anyptr != NULL)
3116                                                                         goto normal_ACONST;
3117
3118                                                                 /* copy the constant (NULL) to s3 */
3119                                                                 iptr->sx.s23.s3.constval = 0;
3120                                                                 iptr->opc = ICMD_AASTORECONST;
3121                                                                 iptr->flags.bits |= INS_FLAG_CHECK;
3122                                                                 OP2_0(TYPE_ADR, TYPE_INT);
3123
3124                                                                 iptr[1].opc = ICMD_NOP;
3125                                                                 COUNT(count_pcmd_op);
3126                                                                 break;
3127
3128                                                         case ICMD_PUTSTATIC:
3129                                                         case ICMD_PUTFIELD:
3130 # if SUPPORT_CONST_STORE_ZERO_ONLY
3131                                                                 if (iptr->sx.val.anyptr != NULL)
3132                                                                         goto normal_ACONST;
3133 # endif
3134                                                                 /* XXX check field type? */
3135                                                                 /* copy the constant to s2 */
3136                                                                 /* XXX constval -> fieldconstval? */
3137                                                                 iptr->sx.s23.s2.constval = (ptrint) iptr->sx.val.anyptr;
3138
3139                                                                 goto putconst_tail;
3140
3141                                                         default:
3142                                                                 goto normal_ACONST;
3143                                                 }
3144
3145                                                 /* if we get here the ACONST has been optimized */
3146                                                 break;
3147
3148 normal_ACONST:
3149 #endif /* SUPPORT_CONST_STORE */
3150                                                 OP0_1(TYPE_ADR);
3151                                                 break;
3152
3153
3154                                                 /* pop 0 push 1 load */
3155
3156                                         case ICMD_ILOAD:
3157                                         case ICMD_LLOAD:
3158                                         case ICMD_FLOAD:
3159                                         case ICMD_DLOAD:
3160                                         case ICMD_ALOAD:
3161                                                 COUNT(count_load_instruction);
3162                                                 type = opcode - ICMD_ILOAD;
3163
3164                                                 varindex = iptr->s1.varindex =
3165                                                         jd->local_map[iptr->s1.varindex * 5 + type];
3166
3167 #if defined(ENABLE_VERIFIER)
3168                                                 if (sd.var[varindex].type == TYPE_RET) {
3169                                                         exceptions_throw_verifyerror(m, "forbidden load of returnAddress");
3170                                                         return false;
3171                                                 }
3172 #endif
3173                                                 LOAD(type, varindex);
3174                                                 break;
3175
3176                                                 /* pop 2 push 1 */
3177
3178                                         case ICMD_LALOAD:
3179                                         case ICMD_FALOAD:
3180                                         case ICMD_DALOAD:
3181                                         case ICMD_AALOAD:
3182                                                 coalescing_boundary = sd.new;
3183                                                 iptr->flags.bits |= INS_FLAG_CHECK;
3184                                                 COUNT(count_check_null);
3185                                                 COUNT(count_check_bound);
3186                                                 COUNT(count_pcmd_mem);
3187                                                 OP2_1(TYPE_ADR, TYPE_INT, opcode - ICMD_IALOAD);
3188                                                 break;
3189
3190                                         case ICMD_IALOAD:
3191                                         case ICMD_BALOAD:
3192                                         case ICMD_CALOAD:
3193                                         case ICMD_SALOAD:
3194                                                 coalescing_boundary = sd.new;
3195                                                 iptr->flags.bits |= INS_FLAG_CHECK;
3196                                                 COUNT(count_check_null);
3197                                                 COUNT(count_check_bound);
3198                                                 COUNT(count_pcmd_mem);
3199                                                 OP2_1(TYPE_ADR, TYPE_INT, TYPE_INT);
3200                                                 break;
3201
3202                                                 /* pop 0 push 0 iinc */
3203
3204                                         case ICMD_IINC:
3205                                                 STATISTICS_STACKDEPTH_DISTRIBUTION(count_store_depth);
3206                                                 last_store_boundary[iptr->s1.varindex] = sd.new;
3207
3208                                                 iptr->s1.varindex =
3209                                                         jd->local_map[iptr->s1.varindex * 5 + TYPE_INT];
3210
3211                                                 copy = curstack;
3212                                                 i = stackdepth - 1;
3213                                                 while (copy) {
3214                                                         if ((copy->varkind == LOCALVAR) &&
3215                                                                 (copy->varnum == iptr->s1.varindex))
3216                                                         {
3217                                                                 assert(IS_LOCALVAR(copy));
3218                                                                 SET_TEMPVAR(copy);
3219                                                         }
3220                                                         i--;
3221                                                         copy = copy->prev;
3222                                                 }
3223
3224                                                 iptr->dst.varindex = iptr->s1.varindex;
3225                                                 break;
3226
3227                                                 /* pop 1 push 0 store */
3228
3229                                         case ICMD_ISTORE:
3230                                         case ICMD_LSTORE:
3231                                         case ICMD_FSTORE:
3232                                         case ICMD_DSTORE:
3233                                         case ICMD_ASTORE:
3234                                                 REQUIRE(1);
3235
3236                                                 type = opcode - ICMD_ISTORE;
3237                                                 javaindex = iptr->dst.varindex;
3238                                                 varindex = iptr->dst.varindex =
3239                                                         jd->local_map[javaindex * 5 + type];
3240
3241                                                 COPY_VAL_AND_TYPE(sd, curstack->varnum, varindex);
3242
3243                                                 iptr->sx.s23.s3.javaindex = javaindex;
3244
3245                                                 if (curstack->type == TYPE_RET) {
3246                                                         iptr->flags.bits |= INS_FLAG_RETADDR;
3247                                                         iptr->sx.s23.s2.retaddrnr =
3248                                                                 JAVALOCAL_FROM_RETADDR(sd.var[varindex].vv.retaddr->nr);
3249                                                         sd.javalocals[javaindex] = iptr->sx.s23.s2.retaddrnr;
3250                                                 }
3251                                                 else
3252                                                         sd.javalocals[javaindex] = varindex;
3253
3254                                                 /* invalidate the following javalocal for 2-word types */
3255
3256                                                 if (IS_2_WORD_TYPE(type)) {
3257                                                         sd.javalocals[javaindex+1] = UNUSED;
3258                                                         iptr->flags.bits |= INS_FLAG_KILL_NEXT;
3259                                                 }
3260
3261                                                 /* invalidate 2-word types if second half was overwritten */
3262
3263                                                 if (javaindex > 0 && (i = sd.javalocals[javaindex-1]) >= 0) {
3264                                                         if (IS_2_WORD_TYPE(sd.var[i].type)) {
3265                                                                 sd.javalocals[javaindex-1] = UNUSED;
3266                                                                 iptr->flags.bits |= INS_FLAG_KILL_PREV;
3267                                                         }
3268                                                 }
3269
3270 #if defined(ENABLE_STATISTICS)
3271                                                 if (opt_stat) {
3272                                                         count_pcmd_store++;
3273                                                         i = sd.new - curstack;
3274                                                         if (i >= 20)
3275                                                                 count_store_length[20]++;
3276                                                         else
3277                                                                 count_store_length[i]++;
3278                                                         i = stackdepth - 1;
3279                                                         if (i >= 10)
3280                                                                 count_store_depth[10]++;
3281                                                         else
3282                                                                 count_store_depth[i]++;
3283                                                 }
3284 #endif
3285
3286                                                 /* check for conflicts as described in Figure 5.2 */
3287
3288                                                 copy = curstack->prev;
3289                                                 i = stackdepth - 2;
3290                                                 while (copy) {
3291                                                         if ((copy->varkind == LOCALVAR) &&
3292                                                                 (copy->varnum == varindex))
3293                                                         {
3294                                                                 copy->varkind = TEMPVAR;
3295                                                                 assert(IS_LOCALVAR(copy));
3296                                                                 SET_TEMPVAR(copy);
3297                                                         }
3298                                                         i--;
3299                                                         copy = copy->prev;
3300                                                 }
3301
3302                                                 /* if the variable is already coalesced, don't bother */
3303
3304                                                 /* We do not need to check against INOUT, as invars */
3305                                                 /* are always before the coalescing boundary.        */
3306
3307                                                 if (curstack->varkind == LOCALVAR)
3308                                                         goto store_tail;
3309
3310                                                 /* there is no STORE Lj while curstack is live */
3311
3312                                                 if (curstack < last_store_boundary[javaindex])
3313                                                         goto assume_conflict;
3314
3315                                                 /* curstack must be after the coalescing boundary */
3316
3317                                                 if (curstack < coalescing_boundary)
3318                                                         goto assume_conflict;
3319
3320                                                 /* there is no DEF LOCALVAR(varindex) while curstack is live */
3321
3322                                                 copy = sd.new; /* most recent stackslot created + 1 */
3323                                                 while (--copy > curstack) {
3324                                                         if (copy->varkind == LOCALVAR && copy->varnum == varindex)
3325                                                                 goto assume_conflict;
3326                                                 }
3327
3328                                                 /* coalesce the temporary variable with Lj */
3329                                                 assert((curstack->varkind == TEMPVAR)
3330                                                                         || (curstack->varkind == UNDEFVAR));
3331                                                 assert(!IS_LOCALVAR(curstack)); /* XXX correct? */
3332                                                 assert(!IS_INOUT(curstack));
3333                                                 assert(!IS_PREALLOC(curstack));
3334
3335                                                 assert(curstack->creator);
3336                                                 assert(curstack->creator->dst.varindex == curstack->varnum);
3337                                                 assert(!(curstack->flags & PASSTHROUGH));
3338                                                 RELEASE_INDEX(sd, curstack);
3339                                                 curstack->varkind = LOCALVAR;
3340                                                 curstack->varnum = varindex;
3341                                                 curstack->creator->dst.varindex = varindex;
3342                                                 goto store_tail;
3343
3344                                                 /* revert the coalescing, if it has been done earlier */
3345 assume_conflict:
3346                                                 if ((curstack->varkind == LOCALVAR)
3347                                                         && (curstack->varnum == varindex))
3348                                                 {
3349                                                         assert(IS_LOCALVAR(curstack));
3350                                                         SET_TEMPVAR(curstack);
3351                                                 }
3352
3353                                                 /* remember the stack boundary at this store */
3354 store_tail:
3355                                                 last_store_boundary[javaindex] = sd.new;
3356
3357                                                 if (opcode == ICMD_ASTORE && curstack->type == TYPE_RET)
3358                                                         STORE(TYPE_RET, varindex);
3359                                                 else
3360                                                         STORE(opcode - ICMD_ISTORE, varindex);
3361                                                 break;
3362
3363                                         /* pop 3 push 0 */
3364
3365                                         case ICMD_AASTORE:
3366                                                 coalescing_boundary = sd.new;
3367                                                 iptr->flags.bits |= INS_FLAG_CHECK;
3368                                                 COUNT(count_check_null);
3369                                                 COUNT(count_check_bound);
3370                                                 COUNT(count_pcmd_mem);
3371
3372                                                 bte = builtintable_get_internal(BUILTIN_canstore);
3373                                                 md = bte->md;
3374
3375                                                 if (md->memuse > rd->memuse)
3376                                                         rd->memuse = md->memuse;
3377                                                 if (md->argintreguse > rd->argintreguse)
3378                                                         rd->argintreguse = md->argintreguse;
3379                                                 /* XXX non-leaf method? */
3380
3381                                                 /* make all stack variables saved */
3382
3383                                                 copy = curstack;
3384                                                 while (copy) {
3385                                                         sd.var[copy->varnum].flags |= SAVEDVAR;
3386                                                         /* in case copy->varnum is/will be a LOCALVAR */
3387                                                         /* once and set back to a non LOCALVAR        */
3388                                                         /* the correct SAVEDVAR flag has to be        */
3389                                                         /* remembered in copy->flags, too             */
3390                                                         copy->flags |= SAVEDVAR;
3391                                                         copy = copy->prev;
3392                                                 }
3393
3394                                                 OP3_0(TYPE_ADR, TYPE_INT, TYPE_ADR);
3395                                                 break;
3396
3397
3398                                         case ICMD_LASTORE:
3399                                         case ICMD_FASTORE:
3400                                         case ICMD_DASTORE:
3401                                                 coalescing_boundary = sd.new;
3402                                                 iptr->flags.bits |= INS_FLAG_CHECK;
3403                                                 COUNT(count_check_null);
3404                                                 COUNT(count_check_bound);
3405                                                 COUNT(count_pcmd_mem);
3406                                                 OP3_0(TYPE_ADR, TYPE_INT, opcode - ICMD_IASTORE);
3407                                                 break;
3408
3409                                         case ICMD_IASTORE:
3410                                         case ICMD_BASTORE:
3411                                         case ICMD_CASTORE:
3412                                         case ICMD_SASTORE:
3413                                                 coalescing_boundary = sd.new;
3414                                                 iptr->flags.bits |= INS_FLAG_CHECK;
3415                                                 COUNT(count_check_null);
3416                                                 COUNT(count_check_bound);
3417                                                 COUNT(count_pcmd_mem);
3418                                                 OP3_0(TYPE_ADR, TYPE_INT, TYPE_INT);
3419                                                 break;
3420
3421                                                 /* pop 1 push 0 */
3422
3423                                         case ICMD_POP:
3424 #ifdef ENABLE_VERIFIER
3425                                                 if (opt_verify) {
3426                                                         REQUIRE(1);
3427                                                         if (IS_2_WORD_TYPE(curstack->type))
3428                                                                 goto throw_stack_category_error;
3429                                                 }
3430 #endif
3431                                                 OP1_0_ANY;
3432                                                 break;
3433
3434                                         case ICMD_IRETURN:
3435                                         case ICMD_LRETURN:
3436                                         case ICMD_FRETURN:
3437                                         case ICMD_DRETURN:
3438                                         case ICMD_ARETURN:
3439                                                 coalescing_boundary = sd.new;
3440                                                 /* Assert here that no LOCAL or INOUTS get */
3441                                                 /* preallocated, since tha macros are not   */
3442                                                 /* available in md-abi.c! */
3443                                                 if (IS_TEMPVAR(curstack))
3444                                                         md_return_alloc(jd, curstack);
3445                                                 COUNT(count_pcmd_return);
3446                                                 OP1_0(opcode - ICMD_IRETURN);
3447                                                 superblockend = true;
3448                                                 sd.jd->returncount++;
3449                                                 sd.jd->returnblock = sd.bptr;
3450                                                 break;
3451
3452                                         case ICMD_ATHROW:
3453                                                 coalescing_boundary = sd.new;
3454                                                 COUNT(count_check_null);
3455                                                 OP1_0(TYPE_ADR);
3456                                                 curstack = NULL; stackdepth = 0;
3457                                                 superblockend = true;
3458                                                 break;
3459
3460                                         case ICMD_PUTSTATIC:
3461                                                 coalescing_boundary = sd.new;
3462                                                 COUNT(count_pcmd_mem);
3463                                                 INSTRUCTION_GET_FIELDREF(iptr, fmiref);
3464                                                 OP1_0(fmiref->parseddesc.fd->type);
3465                                                 break;
3466
3467                                                 /* pop 1 push 0 branch */
3468
3469                                         case ICMD_IFNULL:
3470                                         case ICMD_IFNONNULL:
3471                                                 COUNT(count_pcmd_bra);
3472                                                 OP1_BRANCH(TYPE_ADR);
3473                                                 BRANCH(tbptr);
3474                                                 break;
3475
3476                                         case ICMD_IFEQ:
3477                                         case ICMD_IFNE:
3478                                         case ICMD_IFLT:
3479                                         case ICMD_IFGE:
3480                                         case ICMD_IFGT:
3481                                         case ICMD_IFLE:
3482                                                 COUNT(count_pcmd_bra);
3483                                                 /* iptr->sx.val.i is set implicitly in parse by
3484                                                    clearing the memory or from IF_ICMPxx
3485                                                    optimization. */
3486
3487                                                 OP1_BRANCH(TYPE_INT);
3488 /*                                              iptr->sx.val.i = 0; */
3489                                                 BRANCH(tbptr);
3490                                                 break;
3491
3492                                                 /* pop 0 push 0 branch */
3493
3494                                         case ICMD_GOTO:
3495                                                 COUNT(count_pcmd_bra);
3496                                                 OP0_BRANCH;
3497                                                 BRANCH(tbptr);
3498                                                 superblockend = true;
3499                                                 break;
3500
3501                                                 /* pop 1 push 0 table branch */
3502
3503                                         case ICMD_TABLESWITCH:
3504                                                 COUNT(count_pcmd_table);
3505                                                 OP1_BRANCH(TYPE_INT);
3506
3507                                                 table = iptr->dst.table;
3508                                                 BRANCH_TARGET(*table, tbptr);
3509                                                 table++;
3510
3511                                                 i = iptr->sx.s23.s3.tablehigh
3512                                                   - iptr->sx.s23.s2.tablelow + 1;
3513
3514                                                 while (--i >= 0) {
3515                                                         BRANCH_TARGET(*table, tbptr);
3516                                                         table++;
3517                                                 }
3518                                                 superblockend = true;
3519                                                 break;
3520
3521                                                 /* pop 1 push 0 table branch */
3522
3523                                         case ICMD_LOOKUPSWITCH:
3524                                                 COUNT(count_pcmd_table);
3525                                                 OP1_BRANCH(TYPE_INT);
3526
3527                                                 BRANCH_TARGET(iptr->sx.s23.s3.lookupdefault, tbptr);
3528
3529                                                 lookup = iptr->dst.lookup;
3530
3531                                                 i = iptr->sx.s23.s2.lookupcount;
3532
3533                                                 while (--i >= 0) {
3534                                                         BRANCH_TARGET(lookup->target, tbptr);
3535                                                         lookup++;
3536                                                 }
3537                                                 superblockend = true;
3538                                                 break;
3539
3540                                         case ICMD_MONITORENTER:
3541                                         case ICMD_MONITOREXIT:
3542                                                 coalescing_boundary = sd.new;
3543                                                 COUNT(count_check_null);
3544                                                 OP1_0(TYPE_ADR);
3545                                                 break;
3546
3547                                                 /* pop 2 push 0 branch */
3548
3549                                         case ICMD_IF_ICMPEQ:
3550                                         case ICMD_IF_ICMPNE:
3551                                         case ICMD_IF_ICMPLT:
3552                                         case ICMD_IF_ICMPGE:
3553                                         case ICMD_IF_ICMPGT:
3554                                         case ICMD_IF_ICMPLE:
3555                                                 COUNT(count_pcmd_bra);
3556                                                 OP2_BRANCH(TYPE_INT, TYPE_INT);
3557                                                 BRANCH(tbptr);
3558                                                 break;
3559
3560                                         case ICMD_IF_ACMPEQ:
3561                                         case ICMD_IF_ACMPNE:
3562                                                 COUNT(count_pcmd_bra);
3563                                                 OP2_BRANCH(TYPE_ADR, TYPE_ADR);
3564                                                 BRANCH(tbptr);
3565                                                 break;
3566
3567                                                 /* pop 2 push 0 */
3568
3569                                         case ICMD_PUTFIELD:
3570                                                 coalescing_boundary = sd.new;
3571                                                 COUNT(count_check_null);
3572                                                 COUNT(count_pcmd_mem);
3573                                                 INSTRUCTION_GET_FIELDREF(iptr, fmiref);
3574                                                 OP2_0(TYPE_ADR, fmiref->parseddesc.fd->type);
3575                                                 break;
3576
3577                                         case ICMD_POP2:
3578                                                 REQUIRE(1);
3579                                                 if (!IS_2_WORD_TYPE(curstack->type)) {
3580                                                         /* ..., cat1 */
3581 #ifdef ENABLE_VERIFIER
3582                                                         if (opt_verify) {
3583                                                                 REQUIRE(2);
3584                                                                 if (IS_2_WORD_TYPE(curstack->prev->type))
3585                                                                         goto throw_stack_category_error;
3586                                                         }
3587 #endif
3588                                                         OP2_0_ANY_ANY; /* pop two slots */
3589                                                 }
3590                                                 else {
3591                                                         iptr->opc = ICMD_POP;
3592                                                         OP1_0_ANY; /* pop one (two-word) slot */
3593                                                 }
3594                                                 break;
3595
3596                                                 /* pop 0 push 1 dup */
3597
3598                                         case ICMD_DUP:
3599 #ifdef ENABLE_VERIFIER
3600                                                 if (opt_verify) {
3601                                                         REQUIRE(1);
3602                                                         if (IS_2_WORD_TYPE(curstack->type))
3603                                                                 goto throw_stack_category_error;
3604                                                 }
3605 #endif
3606                                                 COUNT(count_dup_instruction);
3607
3608 icmd_DUP:
3609                                                 src1 = curstack;
3610
3611                                                 COPY_UP(src1);
3612                                                 coalescing_boundary = sd.new - 1;
3613                                                 break;
3614
3615                                         case ICMD_DUP2:
3616                                                 REQUIRE(1);
3617                                                 if (IS_2_WORD_TYPE(curstack->type)) {
3618                                                         /* ..., cat2 */
3619                                                         iptr->opc = ICMD_DUP;
3620                                                         goto icmd_DUP;
3621                                                 }
3622                                                 else {
3623                                                         REQUIRE(2);
3624                                                         /* ..., ????, cat1 */
3625 #ifdef ENABLE_VERIFIER
3626                                                         if (opt_verify) {
3627                                                                 if (IS_2_WORD_TYPE(curstack->prev->type))
3628                                                                         goto throw_stack_category_error;
3629                                                         }
3630 #endif
3631                                                         src1 = curstack->prev;
3632                                                         src2 = curstack;
3633
3634                                                         COPY_UP(src1); iptr++; len--;
3635                                                         COPY_UP(src2);
3636
3637                                                         coalescing_boundary = sd.new;
3638                                                 }
3639                                                 break;
3640
3641                                                 /* pop 2 push 3 dup */
3642
3643                                         case ICMD_DUP_X1:
3644 #ifdef ENABLE_VERIFIER
3645                                                 if (opt_verify) {
3646                                                         REQUIRE(2);
3647                                                         if (IS_2_WORD_TYPE(curstack->type) ||
3648                                                                 IS_2_WORD_TYPE(curstack->prev->type))
3649                                                                         goto throw_stack_category_error;
3650                                                 }
3651 #endif
3652
3653 icmd_DUP_X1:
3654                                                 src1 = curstack->prev;
3655                                                 src2 = curstack;
3656                                                 POPANY; POPANY;
3657                                                 stackdepth -= 2;
3658
3659                                                 /* move non-temporary sources out of the way */
3660                                                 if (!IS_TEMPVAR(src2)) {
3661                                                         MOVE_TO_TEMP(src2); iptr++; len--;
3662                                                 }
3663
3664                                                 DUP_SLOT(src2); dst1 = curstack; stackdepth++;
3665
3666                                                 MOVE_UP(src1); iptr++; len--;
3667                                                 MOVE_UP(src2); iptr++; len--;
3668
3669                                                 COPY_DOWN(curstack, dst1);
3670
3671                                                 coalescing_boundary = sd.new;
3672                                                 break;
3673
3674                                         case ICMD_DUP2_X1:
3675                                                 REQUIRE(2);
3676                                                 if (IS_2_WORD_TYPE(curstack->type)) {
3677                                                         /* ..., ????, cat2 */
3678 #ifdef ENABLE_VERIFIER
3679                                                         if (opt_verify) {
3680                                                                 if (IS_2_WORD_TYPE(curstack->prev->type))
3681                                                                         goto throw_stack_category_error;
3682                                                         }
3683 #endif
3684                                                         iptr->opc = ICMD_DUP_X1;
3685                                                         goto icmd_DUP_X1;
3686                                                 }
3687                                                 else {
3688                                                         /* ..., ????, cat1 */
3689 #ifdef ENABLE_VERIFIER
3690                                                         if (opt_verify) {
3691                                                                 REQUIRE(3);
3692                                                                 if (IS_2_WORD_TYPE(curstack->prev->type)
3693                                                                         || IS_2_WORD_TYPE(curstack->prev->prev->type))
3694                                                                                 goto throw_stack_category_error;
3695                                                         }
3696 #endif
3697
3698 icmd_DUP2_X1:
3699                                                         src1 = curstack->prev->prev;
3700                                                         src2 = curstack->prev;
3701                                                         src3 = curstack;
3702                                                         POPANY; POPANY; POPANY;
3703                                                         stackdepth -= 3;
3704
3705                                                         /* move non-temporary sources out of the way */
3706                                                         if (!IS_TEMPVAR(src2)) {
3707                                                                 MOVE_TO_TEMP(src2); iptr++; len--;
3708                                                         }
3709                                                         if (!IS_TEMPVAR(src3)) {
3710                                                                 MOVE_TO_TEMP(src3); iptr++; len--;
3711                                                         }
3712
3713                                                         DUP_SLOT(src2); dst1 = curstack; stackdepth++;
3714                                                         DUP_SLOT(src3); dst2 = curstack; stackdepth++;
3715
3716                                                         MOVE_UP(src1); iptr++; len--;
3717                                                         MOVE_UP(src2); iptr++; len--;
3718                                                         MOVE_UP(src3); iptr++; len--;
3719
3720                                                         COPY_DOWN(curstack, dst2); iptr++; len--;
3721                                                         COPY_DOWN(curstack->prev, dst1);
3722
3723                                                         coalescing_boundary = sd.new;
3724                                                 }
3725                                                 break;
3726
3727                                                 /* pop 3 push 4 dup */
3728
3729                                         case ICMD_DUP_X2:
3730                                                 REQUIRE(2);
3731                                                 if (IS_2_WORD_TYPE(curstack->prev->type)) {
3732                                                         /* ..., cat2, ???? */
3733 #ifdef ENABLE_VERIFIER
3734                                                         if (opt_verify) {
3735                                                                 if (IS_2_WORD_TYPE(curstack->type))
3736                                                                         goto throw_stack_category_error;
3737                                                         }
3738 #endif
3739                                                         iptr->opc = ICMD_DUP_X1;
3740                                                         goto icmd_DUP_X1;
3741                                                 }
3742                                                 else {
3743                                                         /* ..., cat1, ???? */
3744 #ifdef ENABLE_VERIFIER
3745                                                         if (opt_verify) {
3746                                                                 REQUIRE(3);
3747                                                                 if (IS_2_WORD_TYPE(curstack->type)
3748                                                                         || IS_2_WORD_TYPE(curstack->prev->prev->type))
3749                                                                                         goto throw_stack_category_error;
3750                                                         }
3751 #endif
3752 icmd_DUP_X2:
3753                                                         src1 = curstack->prev->prev;
3754                                                         src2 = curstack->prev;
3755                                                         src3 = curstack;
3756                                                         POPANY; POPANY; POPANY;
3757                                                         stackdepth -= 3;
3758
3759                                                         /* move non-temporary sources out of the way */
3760                                                         if (!IS_TEMPVAR(src2)) {
3761                                                                 MOVE_TO_TEMP(src2); iptr++; len--;
3762                                                         }
3763                                                         if (!IS_TEMPVAR(src3)) {
3764                                                                 MOVE_TO_TEMP(src3); iptr++; len--;
3765                                                         }
3766
3767                                                         DUP_SLOT(src3); dst1 = curstack; stackdepth++;
3768
3769                                                         MOVE_UP(src1); iptr++; len--;
3770                                                         MOVE_UP(src2); iptr++; len--;
3771                                                         MOVE_UP(src3); iptr++; len--;
3772
3773                                                         COPY_DOWN(curstack, dst1);
3774
3775                                                         coalescing_boundary = sd.new;
3776                                                 }
3777                                                 break;
3778
3779                                         case ICMD_DUP2_X2:
3780                                                 REQUIRE(2);
3781                                                 if (IS_2_WORD_TYPE(curstack->type)) {
3782                                                         /* ..., ????, cat2 */
3783                                                         if (IS_2_WORD_TYPE(curstack->prev->type)) {
3784                                                                 /* ..., cat2, cat2 */
3785                                                                 iptr->opc = ICMD_DUP_X1;
3786                                                                 goto icmd_DUP_X1;
3787                                                         }
3788                                                         else {
3789                                                                 /* ..., cat1, cat2 */
3790 #ifdef ENABLE_VERIFIER
3791                                                                 if (opt_verify) {
3792                                                                         REQUIRE(3);
3793                                                                         if (IS_2_WORD_TYPE(curstack->prev->prev->type))
3794                                                                                         goto throw_stack_category_error;
3795                                                                 }
3796 #endif
3797                                                                 iptr->opc = ICMD_DUP_X2;
3798                                                                 goto icmd_DUP_X2;
3799                                                         }
3800                                                 }
3801
3802                                                 REQUIRE(3);
3803                                                 /* ..., ????, ????, cat1 */
3804
3805                                                 if (IS_2_WORD_TYPE(curstack->prev->prev->type)) {
3806                                                         /* ..., cat2, ????, cat1 */
3807 #ifdef ENABLE_VERIFIER
3808                                                         if (opt_verify) {
3809                                                                 if (IS_2_WORD_TYPE(curstack->prev->type))
3810                                                                         goto throw_stack_category_error;
3811                                                         }
3812 #endif
3813                                                         iptr->opc = ICMD_DUP2_X1;
3814                                                         goto icmd_DUP2_X1;
3815                                                 }
3816                                                 else {
3817                                                         /* ..., cat1, ????, cat1 */
3818 #ifdef ENABLE_VERIFIER
3819                                                         if (opt_verify) {
3820                                                                 REQUIRE(4);
3821                                                                 if (IS_2_WORD_TYPE(curstack->prev->type)
3822                                                                         || IS_2_WORD_TYPE(curstack->prev->prev->prev->type))
3823                                                                         goto throw_stack_category_error;
3824                                                         }
3825 #endif
3826
3827                                                         src1 = curstack->prev->prev->prev;
3828                                                         src2 = curstack->prev->prev;
3829                                                         src3 = curstack->prev;
3830                                                         src4 = curstack;
3831                                                         POPANY; POPANY; POPANY; POPANY;
3832                                                         stackdepth -= 4;
3833
3834                                                         /* move non-temporary sources out of the way */
3835                                                         if (!IS_TEMPVAR(src2)) {
3836                                                                 MOVE_TO_TEMP(src2); iptr++; len--;
3837                                                         }
3838                                                         if (!IS_TEMPVAR(src3)) {
3839                                                                 MOVE_TO_TEMP(src3); iptr++; len--;
3840                                                         }
3841                                                         if (!IS_TEMPVAR(src4)) {
3842                                                                 MOVE_TO_TEMP(src4); iptr++; len--;
3843                                                         }
3844
3845                                                         DUP_SLOT(src3); dst1 = curstack; stackdepth++;
3846                                                         DUP_SLOT(src4); dst2 = curstack; stackdepth++;
3847
3848                                                         MOVE_UP(src1); iptr++; len--;
3849                                                         MOVE_UP(src2); iptr++; len--;
3850                                                         MOVE_UP(src3); iptr++; len--;
3851                                                         MOVE_UP(src4); iptr++; len--;
3852
3853                                                         COPY_DOWN(curstack, dst2); iptr++; len--;
3854                                                         COPY_DOWN(curstack->prev, dst1);
3855
3856                                                         coalescing_boundary = sd.new;
3857                                                 }
3858                                                 break;
3859
3860                                                 /* pop 2 push 2 swap */
3861
3862                                         case ICMD_SWAP:
3863 #ifdef ENABLE_VERIFIER
3864                                                 if (opt_verify) {
3865                                                         REQUIRE(2);
3866                                                         if (IS_2_WORD_TYPE(curstack->type)
3867                                                                 || IS_2_WORD_TYPE(curstack->prev->type))
3868                                                                 goto throw_stack_category_error;
3869                                                 }
3870 #endif
3871
3872                                                 src1 = curstack->prev;
3873                                                 src2 = curstack;
3874                                                 POPANY; POPANY;
3875                                                 stackdepth -= 2;
3876
3877                                                 /* move non-temporary sources out of the way */
3878                                                 if (!IS_TEMPVAR(src1)) {
3879                                                         MOVE_TO_TEMP(src1); iptr++; len--;
3880                                                 }
3881
3882                                                 MOVE_UP(src2); iptr++; len--;
3883                                                 MOVE_UP(src1);
3884
3885                                                 coalescing_boundary = sd.new;
3886                                                 break;
3887
3888                                                 /* pop 2 push 1 */
3889
3890                                         case ICMD_IDIV:
3891                                         case ICMD_IREM:
3892                                                 coalescing_boundary = sd.new;
3893 #if !SUPPORT_DIVISION
3894                                                 bte = iptr->sx.s23.s3.bte;
3895                                                 md = bte->md;
3896
3897                                                 if (md->memuse > rd->memuse)
3898                                                         rd->memuse = md->memuse;
3899                                                 if (md->argintreguse > rd->argintreguse)
3900                                                         rd->argintreguse = md->argintreguse;
3901
3902                                                 /* make all stack variables saved */
3903
3904                                                 copy = curstack;
3905                                                 while (copy) {
3906                                                         sd.var[copy->varnum].flags |= SAVEDVAR;
3907                                                         copy->flags |= SAVEDVAR;
3908                                                         copy = copy->prev;
3909                                                 }
3910                                                 /* FALLTHROUGH */
3911
3912 #endif /* !SUPPORT_DIVISION */
3913
3914                                         case ICMD_ISHL:
3915                                         case ICMD_ISHR:
3916                                         case ICMD_IUSHR:
3917                                         case ICMD_IADD:
3918                                         case ICMD_ISUB:
3919                                         case ICMD_IMUL:
3920                                         case ICMD_IAND:
3921                                         case ICMD_IOR:
3922                                         case ICMD_IXOR:
3923                                                 COUNT(count_pcmd_op);
3924                                                 OP2_1(TYPE_INT, TYPE_INT, TYPE_INT);
3925                                                 break;
3926
3927                                         case ICMD_LDIV:
3928                                         case ICMD_LREM:
3929                                                 coalescing_boundary = sd.new;
3930 #if !(SUPPORT_DIVISION && SUPPORT_LONG && SUPPORT_LONG_DIV)
3931                                                 bte = iptr->sx.s23.s3.bte;
3932                                                 md = bte->md;
3933
3934                                                 if (md->memuse > rd->memuse)
3935                                                         rd->memuse = md->memuse;
3936                                                 if (md->argintreguse > rd->argintreguse)
3937                                                         rd->argintreguse = md->argintreguse;
3938                                                 /* XXX non-leaf method? */
3939
3940                                                 /* make all stack variables saved */
3941
3942                                                 copy = curstack;
3943                                                 while (copy) {
3944                                                         sd.var[copy->varnum].flags |= SAVEDVAR;
3945                                                         copy->flags |= SAVEDVAR;
3946                                                         copy = copy->prev;
3947                                                 }
3948                                                 /* FALLTHROUGH */
3949
3950 #endif /* !(SUPPORT_DIVISION && SUPPORT_LONG && SUPPORT_LONG_DIV) */
3951
3952                                         case ICMD_LMUL:
3953                                         case ICMD_LADD:
3954                                         case ICMD_LSUB:
3955 #if SUPPORT_LONG_LOGICAL
3956                                         case ICMD_LAND:
3957                                         case ICMD_LOR:
3958                                         case ICMD_LXOR:
3959 #endif /* SUPPORT_LONG_LOGICAL */
3960                                                 COUNT(count_pcmd_op);
3961                                                 OP2_1(TYPE_LNG, TYPE_LNG, TYPE_LNG);
3962                                                 break;
3963
3964                                         case ICMD_LSHL:
3965                                         case ICMD_LSHR:
3966                                         case ICMD_LUSHR:
3967                                                 COUNT(count_pcmd_op);
3968                                                 OP2_1(TYPE_LNG, TYPE_INT, TYPE_LNG);
3969                                                 break;
3970
3971                                         case ICMD_FADD:
3972                                         case ICMD_FSUB:
3973                                         case ICMD_FMUL:
3974                                         case ICMD_FDIV:
3975                                         case ICMD_FREM:
3976                                                 COUNT(count_pcmd_op);
3977                                                 OP2_1(TYPE_FLT, TYPE_FLT, TYPE_FLT);
3978                                                 break;
3979
3980                                         case ICMD_DADD:
3981                                         case ICMD_DSUB:
3982                                         case ICMD_DMUL:
3983                                         case ICMD_DDIV:
3984                                         case ICMD_DREM:
3985                                                 COUNT(count_pcmd_op);
3986                                                 OP2_1(TYPE_DBL, TYPE_DBL, TYPE_DBL);
3987                                                 break;
3988
3989                                         case ICMD_LCMP:
3990                                                 COUNT(count_pcmd_op);
3991 #if SUPPORT_LONG_CMP_CONST
3992                                                 if ((len == 0) || (iptr[1].sx.val.i != 0))
3993                                                         goto normal_LCMP;
3994
3995                                                 switch (iptr[1].opc) {
3996                                                 case ICMD_IFEQ:
3997                                                         iptr->opc = ICMD_IF_LCMPEQ;
3998                                                 icmd_lcmp_if_tail:
3999                                                         iptr->dst.block = iptr[1].dst.block;
4000                                                         iptr[1].opc = ICMD_NOP;
4001
4002                                                         OP2_BRANCH(TYPE_LNG, TYPE_LNG);
4003                                                         BRANCH(tbptr);
4004
4005                                                         COUNT(count_pcmd_bra);
4006                                                         break;
4007                                                 case ICMD_IFNE:
4008                                                         iptr->opc = ICMD_IF_LCMPNE;
4009                                                         goto icmd_lcmp_if_tail;
4010                                                 case ICMD_IFLT:
4011                                                         iptr->opc = ICMD_IF_LCMPLT;
4012                                                         goto icmd_lcmp_if_tail;
4013                                                 case ICMD_IFGT:
4014                                                         iptr->opc = ICMD_IF_LCMPGT;
4015                                                         goto icmd_lcmp_if_tail;
4016                                                 case ICMD_IFLE:
4017                                                         iptr->opc = ICMD_IF_LCMPLE;
4018                                                         goto icmd_lcmp_if_tail;
4019                                                 case ICMD_IFGE:
4020                                                         iptr->opc = ICMD_IF_LCMPGE;
4021                                                         goto icmd_lcmp_if_tail;
4022                                                 default:
4023                                                         goto normal_LCMP;
4024                                                 }
4025                                                 break;
4026 normal_LCMP:
4027 #endif /* SUPPORT_LONG_CMP_CONST */
4028                                                         OP2_1(TYPE_LNG, TYPE_LNG, TYPE_INT);
4029                                                 break;
4030
4031                                                 /* XXX why is this deactivated? */
4032 #if 0
4033                                         case ICMD_FCMPL:
4034                                                 COUNT(count_pcmd_op);
4035                                                 if ((len == 0) || (iptr[1].sx.val.i != 0))
4036                                                         goto normal_FCMPL;
4037
4038                                                 switch (iptr[1].opc) {
4039                                                 case ICMD_IFEQ:
4040                                                         iptr->opc = ICMD_IF_FCMPEQ;
4041                                                 icmd_if_fcmpl_tail:
4042                                                         iptr->dst.block = iptr[1].dst.block;
4043                                                         iptr[1].opc = ICMD_NOP;
4044
4045                                                         OP2_BRANCH(TYPE_FLT, TYPE_FLT);
4046                                                         BRANCH(tbptr);
4047
4048                                                         COUNT(count_pcmd_bra);
4049                                                         break;
4050                                                 case ICMD_IFNE:
4051                                                         iptr->opc = ICMD_IF_FCMPNE;
4052                                                         goto icmd_if_fcmpl_tail;
4053                                                 case ICMD_IFLT:
4054                                                         iptr->opc = ICMD_IF_FCMPL_LT;
4055                                                         goto icmd_if_fcmpl_tail;
4056                                                 case ICMD_IFGT:
4057                                                         iptr->opc = ICMD_IF_FCMPL_GT;
4058                                                         goto icmd_if_fcmpl_tail;
4059                                                 case ICMD_IFLE:
4060                                                         iptr->opc = ICMD_IF_FCMPL_LE;
4061                                                         goto icmd_if_fcmpl_tail;
4062                                                 case ICMD_IFGE:
4063                                                         iptr->opc = ICMD_IF_FCMPL_GE;
4064                                                         goto icmd_if_fcmpl_tail;
4065                                                 default:
4066                                                         goto normal_FCMPL;
4067                                                 }
4068                                                 break;
4069
4070 normal_FCMPL:
4071                                                 OPTT2_1(TYPE_FLT, TYPE_FLT, TYPE_INT);
4072                                                 break;
4073
4074                                         case ICMD_FCMPG:
4075                                                 COUNT(count_pcmd_op);
4076                                                 if ((len == 0) || (iptr[1].sx.val.i != 0))
4077                                                         goto normal_FCMPG;
4078
4079                                                 switch (iptr[1].opc) {
4080                                                 case ICMD_IFEQ:
4081                                                         iptr->opc = ICMD_IF_FCMPEQ;
4082                                                 icmd_if_fcmpg_tail:
4083                                                         iptr->dst.block = iptr[1].dst.block;
4084                                                         iptr[1].opc = ICMD_NOP;
4085
4086                                                         OP2_BRANCH(TYPE_FLT, TYPE_FLT);
4087                                                         BRANCH(tbptr);
4088
4089                                                         COUNT(count_pcmd_bra);
4090                                                         break;
4091                                                 case ICMD_IFNE:
4092                                                         iptr->opc = ICMD_IF_FCMPNE;
4093                                                         goto icmd_if_fcmpg_tail;
4094                                                 case ICMD_IFLT:
4095                                                         iptr->opc = ICMD_IF_FCMPG_LT;
4096                                                         goto icmd_if_fcmpg_tail;
4097                                                 case ICMD_IFGT:
4098                                                         iptr->opc = ICMD_IF_FCMPG_GT;
4099                                                         goto icmd_if_fcmpg_tail;
4100                                                 case ICMD_IFLE:
4101                                                         iptr->opc = ICMD_IF_FCMPG_LE;
4102                                                         goto icmd_if_fcmpg_tail;
4103                                                 case ICMD_IFGE:
4104                                                         iptr->opc = ICMD_IF_FCMPG_GE;
4105                                                         goto icmd_if_fcmpg_tail;
4106                                                 default:
4107                                                         goto normal_FCMPG;
4108                                                 }
4109                                                 break;
4110
4111 normal_FCMPG:
4112                                                 OP2_1(TYPE_FLT, TYPE_FLT, TYPE_INT);
4113                                                 break;
4114
4115                                         case ICMD_DCMPL:
4116                                                 COUNT(count_pcmd_op);
4117                                                 if ((len == 0) || (iptr[1].sx.val.i != 0))
4118                                                         goto normal_DCMPL;
4119
4120                                                 switch (iptr[1].opc) {
4121                                                 case ICMD_IFEQ:
4122                                                         iptr->opc = ICMD_IF_DCMPEQ;
4123                                                 icmd_if_dcmpl_tail:
4124                                                         iptr->dst.block = iptr[1].dst.block;
4125                                                         iptr[1].opc = ICMD_NOP;
4126
4127                                                         OP2_BRANCH(TYPE_DBL, TYPE_DBL);
4128                                                         BRANCH(tbptr);
4129
4130                                                         COUNT(count_pcmd_bra);
4131                                                         break;
4132                                                 case ICMD_IFNE:
4133                                                         iptr->opc = ICMD_IF_DCMPNE;
4134                                                         goto icmd_if_dcmpl_tail;
4135                                                 case ICMD_IFLT:
4136                                                         iptr->opc = ICMD_IF_DCMPL_LT;
4137                                                         goto icmd_if_dcmpl_tail;
4138                                                 case ICMD_IFGT:
4139                                                         iptr->opc = ICMD_IF_DCMPL_GT;
4140                                                         goto icmd_if_dcmpl_tail;
4141                                                 case ICMD_IFLE:
4142                                                         iptr->opc = ICMD_IF_DCMPL_LE;
4143                                                         goto icmd_if_dcmpl_tail;
4144                                                 case ICMD_IFGE:
4145                                                         iptr->opc = ICMD_IF_DCMPL_GE;
4146                                                         goto icmd_if_dcmpl_tail;
4147                                                 default:
4148                                                         goto normal_DCMPL;
4149                                                 }
4150                                                 break;
4151
4152 normal_DCMPL:
4153                                                 OPTT2_1(TYPE_DBL, TYPE_INT);
4154                                                 break;
4155
4156                                         case ICMD_DCMPG:
4157                                                 COUNT(count_pcmd_op);
4158                                                 if ((len == 0) || (iptr[1].sx.val.i != 0))
4159                                                         goto normal_DCMPG;
4160
4161                                                 switch (iptr[1].opc) {
4162                                                 case ICMD_IFEQ:
4163                                                         iptr->opc = ICMD_IF_DCMPEQ;
4164                                                 icmd_if_dcmpg_tail:
4165                                                         iptr->dst.block = iptr[1].dst.block;
4166                                                         iptr[1].opc = ICMD_NOP;
4167
4168                                                         OP2_BRANCH(TYPE_DBL, TYPE_DBL);
4169                                                         BRANCH(tbptr);
4170
4171                                                         COUNT(count_pcmd_bra);
4172                                                         break;
4173                                                 case ICMD_IFNE:
4174                                                         iptr->opc = ICMD_IF_DCMPNE;
4175                                                         goto icmd_if_dcmpg_tail;
4176                                                 case ICMD_IFLT:
4177                                                         iptr->opc = ICMD_IF_DCMPG_LT;
4178                                                         goto icmd_if_dcmpg_tail;
4179                                                 case ICMD_IFGT:
4180                                                         iptr->opc = ICMD_IF_DCMPG_GT;
4181                                                         goto icmd_if_dcmpg_tail;
4182                                                 case ICMD_IFLE:
4183                                                         iptr->opc = ICMD_IF_DCMPG_LE;
4184                                                         goto icmd_if_dcmpg_tail;
4185                                                 case ICMD_IFGE:
4186                                                         iptr->opc = ICMD_IF_DCMPG_GE;
4187                                                         goto icmd_if_dcmpg_tail;
4188                                                 default:
4189                                                         goto normal_DCMPG;
4190                                                 }
4191                                                 break;
4192
4193 normal_DCMPG:
4194                                                 OP2_1(TYPE_DBL, TYPE_DBL, TYPE_INT);
4195                                                 break;
4196 #else
4197                                         case ICMD_FCMPL:
4198                                         case ICMD_FCMPG:
4199                                                 COUNT(count_pcmd_op);
4200                                                 OP2_1(TYPE_FLT, TYPE_FLT, TYPE_INT);
4201                                                 break;
4202
4203                                         case ICMD_DCMPL:
4204                                         case ICMD_DCMPG:
4205                                                 COUNT(count_pcmd_op);
4206                                                 OP2_1(TYPE_DBL, TYPE_DBL, TYPE_INT);
4207                                                 break;
4208 #endif
4209
4210                                                 /* pop 1 push 1 */
4211
4212                                         case ICMD_INEG:
4213                                         case ICMD_INT2BYTE:
4214                                         case ICMD_INT2CHAR:
4215                                         case ICMD_INT2SHORT:
4216                                                 COUNT(count_pcmd_op);
4217                                                 OP1_1(TYPE_INT, TYPE_INT);
4218                                                 break;
4219                                         case ICMD_LNEG:
4220                                                 COUNT(count_pcmd_op);
4221                                                 OP1_1(TYPE_LNG, TYPE_LNG);
4222                                                 break;
4223                                         case ICMD_FNEG:
4224                                                 COUNT(count_pcmd_op);
4225                                                 OP1_1(TYPE_FLT, TYPE_FLT);
4226                                                 break;
4227                                         case ICMD_DNEG:
4228                                                 COUNT(count_pcmd_op);
4229                                                 OP1_1(TYPE_DBL, TYPE_DBL);
4230                                                 break;
4231
4232                                         case ICMD_I2L:
4233                                                 COUNT(count_pcmd_op);
4234                                                 OP1_1(TYPE_INT, TYPE_LNG);
4235                                                 break;
4236                                         case ICMD_I2F:
4237                                                 COUNT(count_pcmd_op);
4238                                                 OP1_1(TYPE_INT, TYPE_FLT);
4239                                                 break;
4240                                         case ICMD_I2D:
4241                                                 COUNT(count_pcmd_op);
4242                                                 OP1_1(TYPE_INT, TYPE_DBL);
4243                                                 break;
4244                                         case ICMD_L2I:
4245                                                 COUNT(count_pcmd_op);
4246                                                 OP1_1(TYPE_LNG, TYPE_INT);
4247                                                 break;
4248                                         case ICMD_L2F:
4249                                                 COUNT(count_pcmd_op);
4250                                                 OP1_1(TYPE_LNG, TYPE_FLT);
4251                                                 break;
4252                                         case ICMD_L2D:
4253                                                 COUNT(count_pcmd_op);
4254                                                 OP1_1(TYPE_LNG, TYPE_DBL);
4255                                                 break;
4256                                         case ICMD_F2I:
4257                                                 COUNT(count_pcmd_op);
4258                                                 OP1_1(TYPE_FLT, TYPE_INT);
4259                                                 break;
4260                                         case ICMD_F2L:
4261                                                 COUNT(count_pcmd_op);
4262                                                 OP1_1(TYPE_FLT, TYPE_LNG);
4263                                                 break;
4264                                         case ICMD_F2D:
4265                                                 COUNT(count_pcmd_op);
4266                                                 OP1_1(TYPE_FLT, TYPE_DBL);
4267                                                 break;
4268                                         case ICMD_D2I:
4269                                                 COUNT(count_pcmd_op);
4270                                                 OP1_1(TYPE_DBL, TYPE_INT);
4271                                                 break;
4272                                         case ICMD_D2L:
4273                                                 COUNT(count_pcmd_op);
4274                                                 OP1_1(TYPE_DBL, TYPE_LNG);
4275                                                 break;
4276                                         case ICMD_D2F:
4277                                                 COUNT(count_pcmd_op);
4278                                                 OP1_1(TYPE_DBL, TYPE_FLT);
4279                                                 break;
4280
4281                                         case ICMD_CHECKCAST:
4282                                                 coalescing_boundary = sd.new;
4283                                                 if (iptr->flags.bits & INS_FLAG_ARRAY) {
4284                                                         /* array type cast-check */
4285
4286                                                         bte = builtintable_get_internal(BUILTIN_arraycheckcast);
4287                                                         md = bte->md;
4288
4289                                                         if (md->memuse > rd->memuse)
4290                                                                 rd->memuse = md->memuse;
4291                                                         if (md->argintreguse > rd->argintreguse)
4292                                                                 rd->argintreguse = md->argintreguse;
4293
4294                                                         /* make all stack variables saved */
4295
4296                                                         copy = curstack;
4297                                                         while (copy) {
4298                                                                 sd.var[copy->varnum].flags |= SAVEDVAR;
4299                                                                 copy->flags |= SAVEDVAR;
4300                                                                 copy = copy->prev;
4301                                                         }
4302                                                 }
4303                                                 OP1_1(TYPE_ADR, TYPE_ADR);
4304                                                 break;
4305
4306                                         case ICMD_INSTANCEOF:
4307                                         case ICMD_ARRAYLENGTH:
4308                                                 coalescing_boundary = sd.new;
4309                                                 OP1_1(TYPE_ADR, TYPE_INT);
4310                                                 break;
4311
4312                                         case ICMD_NEWARRAY:
4313                                         case ICMD_ANEWARRAY:
4314                                                 coalescing_boundary = sd.new;
4315                                                 OP1_1(TYPE_INT, TYPE_ADR);
4316                                                 break;
4317
4318                                         case ICMD_GETFIELD:
4319                                                 coalescing_boundary = sd.new;
4320                                                 COUNT(count_check_null);
4321                                                 COUNT(count_pcmd_mem);
4322                                                 INSTRUCTION_GET_FIELDREF(iptr, fmiref);
4323                                                 OP1_1(TYPE_ADR, fmiref->parseddesc.fd->type);
4324                                                 break;
4325
4326                                                 /* pop 0 push 1 */
4327
4328                                         case ICMD_GETSTATIC:
4329                                                 coalescing_boundary = sd.new;
4330                                                 COUNT(count_pcmd_mem);
4331                                                 INSTRUCTION_GET_FIELDREF(iptr, fmiref);
4332                                                 OP0_1(fmiref->parseddesc.fd->type);
4333                                                 break;
4334
4335                                         case ICMD_NEW:
4336                                                 coalescing_boundary = sd.new;
4337                                                 OP0_1(TYPE_ADR);
4338                                                 break;
4339
4340                                         case ICMD_JSR:
4341                                                 OP0_1(TYPE_RET);
4342
4343                                                 tbptr = iptr->sx.s23.s3.jsrtarget.block;
4344                                                 tbptr->type = BBTYPE_SBR;
4345
4346                                                 assert(sd.bptr->next);  /* XXX exception */
4347                                                 sd.var[curstack->varnum].vv.retaddr = sd.bptr->next;
4348 #if defined(ENABLE_VERIFIER)
4349                                                 sd.var[curstack->varnum].SBRSTART = (void*) tbptr;
4350 #endif
4351
4352                                                 tbptr = stack_mark_reached(&sd, tbptr, curstack, stackdepth);
4353                                                 if (tbptr == NULL)
4354                                                         return false;
4355
4356                                                 iptr->sx.s23.s3.jsrtarget.block = tbptr;
4357
4358                                                 /* We need to check for overflow right here because
4359                                                  * the pushed value is poped afterwards */
4360                                                 CHECKOVERFLOW;
4361
4362                                                 superblockend = true;
4363                                                 /* XXX should not be marked as interface, as it does not need to be */
4364                                                 /* allocated. Same for the invar of the target. */
4365                                                 break;
4366
4367                                         /* pop many push any */
4368
4369                                         case ICMD_BUILTIN:
4370 icmd_BUILTIN:
4371                                                 bte = iptr->sx.s23.s3.bte;
4372                                                 md = bte->md;
4373                                                 goto _callhandling;
4374
4375                                         case ICMD_INVOKESTATIC:
4376                                         case ICMD_INVOKESPECIAL:
4377                                         case ICMD_INVOKEVIRTUAL:
4378                                         case ICMD_INVOKEINTERFACE:
4379                                                 COUNT(count_pcmd_met);
4380
4381                                                 /* Check for functions to replace with builtin
4382                                                  * functions. */
4383
4384                                                 if (builtintable_replace_function(iptr))
4385                                                         goto icmd_BUILTIN;
4386
4387                                                 INSTRUCTION_GET_METHODDESC(iptr, md);
4388                                                 /* XXX resurrect this COUNT? */
4389 /*                          if (lm->flags & ACC_STATIC) */
4390 /*                              {COUNT(count_check_null);} */
4391
4392                                         _callhandling:
4393
4394                                                 coalescing_boundary = sd.new;
4395
4396                                                 i = md->paramcount;
4397
4398                                                 if (md->memuse > rd->memuse)
4399                                                         rd->memuse = md->memuse;
4400                                                 if (md->argintreguse > rd->argintreguse)
4401                                                         rd->argintreguse = md->argintreguse;
4402                                                 if (md->argfltreguse > rd->argfltreguse)
4403                                                         rd->argfltreguse = md->argfltreguse;
4404
4405                                                 REQUIRE(i);
4406
4407                                                 iptr->s1.argcount = stackdepth;
4408                                                 iptr->sx.s23.s2.args = DMNEW(s4, stackdepth);
4409
4410                                                 copy = curstack;
4411                                                 for (i-- ; i >= 0; i--) {
4412                                                         iptr->sx.s23.s2.args[i] = copy->varnum;
4413
4414                                                         /* do not change STACKVARs or LOCALVARS to ARGVAR*/
4415                                                         /* ->  won't help anyway */
4416                                                         if (!(IS_INOUT(copy) || IS_LOCALVAR(copy))) {
4417
4418 #if defined(SUPPORT_PASS_FLOATARGS_IN_INTREGS)
4419                         /* If we pass float arguments in integer argument registers, we
4420                          * are not allowed to precolor them here. Floats have to be moved
4421                          * to this regs explicitly in codegen().
4422                          * Only arguments that are passed by stack anyway can be precolored
4423                          * (michi 2005/07/24) */
4424                                                         if (!(sd.var[copy->varnum].flags & SAVEDVAR) &&
4425                                                            (!IS_FLT_DBL_TYPE(copy->type)
4426                                                                 || md->params[i].inmemory)) {
4427 #else
4428                                                         if (!(sd.var[copy->varnum].flags & SAVEDVAR)) {
4429 #endif
4430
4431                                                                 SET_PREALLOC(copy);
4432
4433                                                                 if (md->params[i].inmemory) {
4434                                                                         sd.var[copy->varnum].vv.regoff =
4435                                                                                 md->params[i].regoff;
4436                                                                         sd.var[copy->varnum].flags |=
4437                                                                                 INMEMORY;
4438                                                                 }
4439                                                                 else {
4440                                                                         if (IS_FLT_DBL_TYPE(copy->type)) {
4441 #if defined(SUPPORT_PASS_FLOATARGS_IN_INTREGS)
4442                                                                                 assert(0); /* XXX is this assert ok? */
4443 #else
4444                                                                                 sd.var[copy->varnum].vv.regoff =
4445                                                                                         md->params[i].regoff;
4446 #endif /* SUPPORT_PASS_FLOATARGS_IN_INTREGS */
4447                                                                         }
4448                                                                         else {
4449 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
4450                                                                                 if (IS_2_WORD_TYPE(copy->type))
4451                                                                                         sd.var[copy->varnum].vv.regoff =
4452                         PACK_REGS(GET_LOW_REG(md->params[i].regoff),
4453                                           GET_HIGH_REG(md->params[i].regoff));
4454
4455                                                                                 else
4456 #endif /* SUPPORT_COMBINE_INTEGER_REGISTERS */
4457                                                                                         sd.var[copy->varnum].vv.regoff =
4458                                                                                                 md->params[i].regoff;
4459                                                                         }
4460                                                                 }
4461                                                         }
4462                                                         }
4463                                                         copy = copy->prev;
4464                                                 }
4465
4466                                                 /* deal with live-through stack slots "under" the */
4467                                                 /* arguments */
4468
4469                                                 i = md->paramcount;
4470
4471                                                 while (copy) {
4472                                                         iptr->sx.s23.s2.args[i++] = copy->varnum;
4473                                                         sd.var[copy->varnum].flags |= SAVEDVAR;
4474                                                         copy->flags |= SAVEDVAR | PASSTHROUGH;
4475                                                         copy = copy->prev;
4476                                                 }
4477
4478                                                 /* pop the arguments */
4479
4480                                                 i = md->paramcount;
4481
4482                                                 stackdepth -= i;
4483                                                 while (--i >= 0) {
4484                                                         POPANY;
4485                                                 }
4486
4487                                                 /* push the return value */
4488
4489                                                 if (md->returntype.type != TYPE_VOID) {
4490                                                         GET_NEW_VAR(sd, new_index, md->returntype.type);
4491                                                         DST(md->returntype.type, new_index);
4492                                                         stackdepth++;
4493                                                 }
4494                                                 break;
4495
4496                                         case ICMD_MULTIANEWARRAY:
4497                                                 coalescing_boundary = sd.new;
4498                                                 if (rd->argintreguse < MIN(3, INT_ARG_CNT))
4499                                                         rd->argintreguse = MIN(3, INT_ARG_CNT);
4500
4501                                                 i = iptr->s1.argcount;
4502
4503                                                 REQUIRE(i);
4504
4505                                                 iptr->sx.s23.s2.args = DMNEW(s4, i);
4506
4507 #if defined(SPECIALMEMUSE)
4508 # if defined(__DARWIN__)
4509                                                 if (rd->memuse < (i + INT_ARG_CNT +LA_SIZE_IN_POINTERS))
4510                                                         rd->memuse = i + LA_SIZE_IN_POINTERS + INT_ARG_CNT;
4511 # else
4512                                                 if (rd->memuse < (i + LA_SIZE_IN_POINTERS + 3))
4513                                                         rd->memuse = i + LA_SIZE_IN_POINTERS + 3;
4514 # endif
4515 #else
4516 # if defined(__I386__)
4517                                                 if (rd->memuse < i + 3)
4518                                                         rd->memuse = i + 3; /* n integer args spilled on stack */
4519 # elif defined(__MIPS__) && SIZEOF_VOID_P == 4
4520                                                 if (rd->memuse < i + 2)
4521                                                         rd->memuse = i + 2; /* 4*4 bytes callee save space */
4522 # else
4523                                                 if (rd->memuse < i)
4524                                                         rd->memuse = i; /* n integer args spilled on stack */
4525 # endif /* defined(__I386__) */
4526 #endif
4527                                                 copy = curstack;
4528                                                 while (--i >= 0) {
4529                                         /* check INT type here? Currently typecheck does this. */
4530                                                         iptr->sx.s23.s2.args[i] = copy->varnum;
4531                                                         if (!(sd.var[copy->varnum].flags & SAVEDVAR)
4532                                                                 && (!IS_INOUT(copy))
4533                                                                 && (!IS_LOCALVAR(copy)) ) {
4534                                                                 copy->varkind = ARGVAR;
4535                                                                 sd.var[copy->varnum].flags |=
4536                                                                         INMEMORY & PREALLOC;
4537 #if defined(SPECIALMEMUSE)
4538 # if defined(__DARWIN__)
4539                                                                 sd.var[copy->varnum].vv.regoff = i +
4540                                                                         LA_SIZE_IN_POINTERS + INT_ARG_CNT;
4541 # else
4542                                                                 sd.var[copy->varnum].vv.regoff = i +
4543                                                                         LA_SIZE_IN_POINTERS + 3;
4544 # endif
4545 #else
4546 # if defined(__I386__)
4547                                                                 sd.var[copy->varnum].vv.regoff = i + 3;
4548 # elif defined(__MIPS__) && SIZEOF_VOID_P == 4
4549                                                                 sd.var[copy->varnum].vv.regoff = i + 2;
4550 # else
4551                                                                 sd.var[copy->varnum].vv.regoff = i;
4552 # endif /* defined(__I386__) */
4553 #endif /* defined(SPECIALMEMUSE) */
4554                                                         }
4555                                                         copy = copy->prev;
4556                                                 }
4557                                                 while (copy) {
4558                                                         sd.var[copy->varnum].flags |= SAVEDVAR;
4559                                                         copy->flags |= SAVEDVAR;
4560                                                         copy = copy->prev;
4561                                                 }
4562
4563                                                 i = iptr->s1.argcount;
4564                                                 stackdepth -= i;
4565                                                 while (--i >= 0) {
4566                                                         POPANY;
4567                                                 }
4568                                                 GET_NEW_VAR(sd, new_index, TYPE_ADR);
4569                                                 DST(TYPE_ADR, new_index);
4570                                                 stackdepth++;
4571                                                 break;
4572
4573                                         default:
4574                                                 exceptions_throw_internalerror("Unknown ICMD %d during stack analysis",
4575                                                                                                            opcode);
4576                                                 return false;
4577                                         } /* switch */
4578
4579                                         CHECKOVERFLOW;
4580                                         iptr++;
4581                                 } /* while instructions */
4582
4583                                 /* show state after last instruction */
4584
4585 #if defined(STACK_VERBOSE)
4586                                 stack_verbose_show_state(&sd, NULL, curstack);
4587 #endif
4588
4589                                 /* stack slots at basic block end become interfaces */
4590
4591                                 sd.bptr->outdepth = stackdepth;
4592                                 sd.bptr->outvars = DMNEW(s4, stackdepth);
4593
4594                                 i = stackdepth - 1;
4595                                 for (copy = curstack; copy; i--, copy = copy->prev) {
4596                                         varinfo *v;
4597
4598                                         /* with the new vars rd->interfaces will be removed */
4599                                         /* and all in and outvars have to be STACKVARS!     */
4600                                         /* in the moment i.e. SWAP with in and out vars can */
4601                                         /* create an unresolvable conflict */
4602
4603                                         SET_TEMPVAR(copy);
4604                                         type = copy->type;
4605
4606                                         v = sd.var + copy->varnum;
4607                                         v->flags |= INOUT;
4608
4609                                         /* do not allocate variables for returnAddresses */
4610
4611                                         if (type != TYPE_RET) {
4612                                                 if (jd->interface_map[i*5 + type].flags == UNUSED) {
4613                                                         /* no interface var until now for this depth and */
4614                                                         /* type */
4615                                                         jd->interface_map[i*5 + type].flags = v->flags;
4616                                                 }
4617                                                 else {
4618                                                         jd->interface_map[i*5 + type].flags |= v->flags;
4619                                                 }
4620                                         }
4621
4622                                         sd.bptr->outvars[i] = copy->varnum;
4623                                 }
4624
4625                                 /* check if interface slots at basic block begin must be saved */
4626
4627                                 for (i=0; i<sd.bptr->indepth; ++i) {
4628                                         varinfo *v = sd.var + sd.bptr->invars[i];
4629
4630                                         type = v->type;
4631
4632                                         if (type != TYPE_RET) {
4633                                                 if (jd->interface_map[i*5 + type].flags == UNUSED) {
4634                                                         /* no interface var until now for this depth and */
4635                                                         /* type */
4636                                                         jd->interface_map[i*5 + type].flags = v->flags;
4637                                                 }
4638                                                 else {
4639                                                         jd->interface_map[i*5 + type].flags |= v->flags;
4640                                                 }
4641                                         }
4642                                 }
4643
4644                                 /* store the number of this block's variables */
4645
4646                                 sd.bptr->varcount = sd.vartop - sd.bptr->varstart;
4647
4648 #if defined(STACK_VERBOSE)
4649                                 stack_verbose_block_exit(&sd, superblockend);
4650 #endif
4651
4652                                 /* reach the following block, if any */
4653
4654                                 if (!superblockend)
4655                                         if (!stack_reach_next_block(&sd))
4656                                                 return false;
4657
4658                 } /* for blocks */
4659
4660         } while (sd.repeat && !deadcode);
4661
4662     /* reset locals of TYPE_RET|VOID to TYPE_ADR */
4663
4664     /* A local variable may be used as both a returnAddress and a reference */
4665     /* type variable, as we do not split variables between these types when */
4666     /* renaming locals. While returnAddresses have been eliminated now, we  */
4667     /* must assume that the variable is still used as TYPE_ADR.             */
4668     /* The only way that a local can be TYPE_VOID at this point, is that it */
4669     /* was a TYPE_RET variable for which incompatible returnAddresses were  */
4670     /* merged. Thus we must treat TYPE_VOID in the same way as TYPE_RET     */
4671     /* here.                                                                */
4672     /* XXX: It would be nice to remove otherwise unused returnAddress       */
4673     /*      variables from the local variable array, so they are not        */
4674     /*      allocated by simplereg. (For LSRA this is not needed).          */
4675
4676         for (i=0; i<sd.localcount; ++i) {
4677                 if (sd.var[i].type == TYPE_RET || sd.var[i].type == TYPE_VOID)
4678                         sd.var[i].type = TYPE_ADR;
4679         }
4680
4681         /* mark temporaries of TYPE_RET as PREALLOC to avoid allocation */
4682
4683         for (i=sd.localcount; i<sd.vartop; ++i) {
4684                 if (sd.var[i].type == TYPE_RET)
4685                         sd.var[i].flags |= PREALLOC;
4686         }
4687
4688         /* XXX hack to fix up the ranges of the cloned single-block handlers */
4689
4690         ex = jd->exceptiontable;
4691         for (; ex != NULL; ex = ex->down) {
4692                 if (ex->start == ex->end) {
4693                         assert(ex->end->next);
4694                         ex->end = ex->end->next;
4695                 }
4696         }
4697
4698         /* store number of created variables */
4699
4700         jd->vartop = sd.vartop;
4701
4702         /* gather statistics *****************************************************/
4703
4704 #if defined(ENABLE_STATISTICS)
4705         if (opt_stat) {
4706                 if (jd->basicblockcount > count_max_basic_blocks)
4707                         count_max_basic_blocks = jd->basicblockcount;
4708                 count_basic_blocks += jd->basicblockcount;
4709                 if (jd->instructioncount > count_max_javainstr)
4710                         count_max_javainstr = jd->instructioncount;
4711                 count_javainstr += jd->instructioncount;
4712                 if (jd->stackcount > count_upper_bound_new_stack)
4713                         count_upper_bound_new_stack = jd->stackcount;
4714                 if ((sd.new - jd->stack) > count_max_new_stack)
4715                         count_max_new_stack = (sd.new - jd->stack);
4716
4717                 sd.bptr = jd->basicblocks;
4718                 for (; sd.bptr; sd.bptr = sd.bptr->next) {
4719                         if (sd.bptr->flags > BBREACHED) {
4720                                 if (sd.bptr->indepth >= 10)
4721                                         count_block_stack[10]++;
4722                                 else
4723                                         count_block_stack[sd.bptr->indepth]++;
4724                                 len = sd.bptr->icount;
4725                                 if (len < 10)
4726                                         count_block_size_distribution[len]++;
4727                                 else if (len <= 12)
4728                                         count_block_size_distribution[10]++;
4729                                 else if (len <= 14)
4730                                         count_block_size_distribution[11]++;
4731                                 else if (len <= 16)
4732                                         count_block_size_distribution[12]++;
4733                                 else if (len <= 18)
4734                                         count_block_size_distribution[13]++;
4735                                 else if (len <= 20)
4736                                         count_block_size_distribution[14]++;
4737                                 else if (len <= 25)
4738                                         count_block_size_distribution[15]++;
4739                                 else if (len <= 30)
4740                                         count_block_size_distribution[16]++;
4741                                 else
4742                                         count_block_size_distribution[17]++;
4743                         }
4744                 }
4745
4746                 if (iteration_count == 1)
4747                         count_analyse_iterations[0]++;
4748                 else if (iteration_count == 2)
4749                         count_analyse_iterations[1]++;
4750                 else if (iteration_count == 3)
4751                         count_analyse_iterations[2]++;
4752                 else if (iteration_count == 4)
4753                         count_analyse_iterations[3]++;
4754                 else
4755                         count_analyse_iterations[4]++;
4756
4757                 if (jd->basicblockcount <= 5)
4758                         count_method_bb_distribution[0]++;
4759                 else if (jd->basicblockcount <= 10)
4760                         count_method_bb_distribution[1]++;
4761                 else if (jd->basicblockcount <= 15)
4762                         count_method_bb_distribution[2]++;
4763                 else if (jd->basicblockcount <= 20)
4764                         count_method_bb_distribution[3]++;
4765                 else if (jd->basicblockcount <= 30)
4766                         count_method_bb_distribution[4]++;
4767                 else if (jd->basicblockcount <= 40)
4768                         count_method_bb_distribution[5]++;
4769                 else if (jd->basicblockcount <= 50)
4770                         count_method_bb_distribution[6]++;
4771                 else if (jd->basicblockcount <= 75)
4772                         count_method_bb_distribution[7]++;
4773                 else
4774                         count_method_bb_distribution[8]++;
4775         }
4776 #endif /* defined(ENABLE_STATISTICS) */
4777
4778         /* everything's ok *******************************************************/
4779
4780         return true;
4781
4782         /* goto labels for throwing verifier exceptions **************************/
4783
4784 #if defined(ENABLE_VERIFIER)
4785
4786 throw_stack_underflow:
4787         exceptions_throw_verifyerror(m, "Unable to pop operand off an empty stack");
4788         return false;
4789
4790 throw_stack_overflow:
4791         exceptions_throw_verifyerror(m, "Stack size too large");
4792         return false;
4793
4794 throw_stack_type_error:
4795         exceptions_throw_verifyerror_for_stack(m, expectedtype);
4796         return false;
4797
4798 throw_stack_category_error:
4799         exceptions_throw_verifyerror(m, "Attempt to split long or double on the stack");
4800         return false;
4801
4802 #endif
4803 }
4804
4805
4806 /* stack_javalocals_store ******************************************************
4807
4808    Model the effect of a ?STORE instruction upon the given javalocals array.
4809
4810    IN:
4811        iptr.............the ?STORE instruction
4812            javalocals.......the javalocals array to modify
4813
4814 *******************************************************************************/
4815
4816 void stack_javalocals_store(instruction *iptr, s4 *javalocals)
4817 {
4818         s4 varindex;     /* index into the jd->var array */
4819         s4 javaindex;    /* java local index             */
4820
4821         varindex = iptr->dst.varindex;
4822         javaindex = iptr->sx.s23.s3.javaindex;
4823
4824         if (javaindex != UNUSED) {
4825                 assert(javaindex >= 0);
4826                 if (iptr->flags.bits & INS_FLAG_RETADDR)
4827                         javalocals[javaindex] = iptr->sx.s23.s2.retaddrnr;
4828                 else
4829                         javalocals[javaindex] = varindex;
4830
4831                 if (iptr->flags.bits & INS_FLAG_KILL_PREV)
4832                         javalocals[javaindex-1] = UNUSED;
4833
4834                 if (iptr->flags.bits & INS_FLAG_KILL_NEXT)
4835                         javalocals[javaindex+1] = UNUSED;
4836         }
4837 }
4838
4839
4840 /* functions for verbose stack analysis output ********************************/
4841
4842 #if defined(STACK_VERBOSE)
4843 static void stack_verbose_show_varinfo(stackdata_t *sd, varinfo *v)
4844 {
4845         printf("%c", show_jit_type_letters[v->type]);
4846         if (v->type == TYPE_RET) {
4847                 printf("{L%03d}", v->vv.retaddr->nr);
4848 #if defined(ENABLE_VERIFIER)
4849                 printf("{start=L%03d}", ((basicblock *)v->SBRSTART)->nr);
4850 #endif
4851         }
4852 }
4853
4854
4855 static void stack_verbose_show_variable(stackdata_t *sd, s4 index)
4856 {
4857         assert(index >= 0 && index < sd->vartop);
4858         stack_verbose_show_varinfo(sd, sd->var + index);
4859 }
4860
4861
4862 static void stack_verbose_show_block(stackdata_t *sd, basicblock *bptr)
4863 {
4864         s4 i;
4865
4866         printf("L%03d type:%d in:%d [", bptr->nr, bptr->type, bptr->indepth);
4867         if (bptr->invars) {
4868                 for (i=0; i<bptr->indepth; ++i) {
4869                         if (i)
4870                                 putchar(' ');
4871                         stack_verbose_show_variable(sd, bptr->invars[i]);
4872                 }
4873         }
4874         else
4875                 putchar('-');
4876         printf("] javalocals ");
4877         show_javalocals_array(sd->jd, sd->javalocals, sd->maxlocals, SHOW_STACK);
4878         printf(" inlocals [");
4879         if (bptr->inlocals) {
4880                 for (i=0; i<sd->localcount; ++i) {
4881                         if (i)
4882                                 putchar(' ');
4883                         stack_verbose_show_varinfo(sd, bptr->inlocals + i);
4884                 }
4885         }
4886         else
4887                 putchar('-');
4888         printf("] out:%d [", bptr->outdepth);
4889         if (bptr->outvars) {
4890                 for (i=0; i<bptr->outdepth; ++i) {
4891                         if (i)
4892                                 putchar(' ');
4893                         stack_verbose_show_variable(sd, bptr->outvars[i]);
4894                 }
4895         }
4896         else
4897                 putchar('-');
4898         printf("]");
4899
4900         if (bptr->original)
4901                 printf(" (clone of L%03d)", bptr->original->nr);
4902         else {
4903                 basicblock *b = bptr->copied_to;
4904                 if (b) {
4905                         printf(" (copied to ");
4906                         for (; b; b = b->copied_to)
4907                                 printf("L%03d ", b->nr);
4908                         printf(")");
4909                 }
4910         }
4911 }
4912
4913
4914 static void stack_verbose_block_enter(stackdata_t *sd, bool reanalyse)
4915 {
4916         int i;
4917
4918         printf("======================================== STACK %sANALYSE BLOCK ",
4919                         (reanalyse) ? ((sd->bptr->iinstr == NULL) ? "CLONE-" : "RE-") : "");
4920         stack_verbose_show_block(sd, sd->bptr);
4921         printf("\n");
4922
4923         if (sd->handlers[0]) {
4924                 printf("HANDLERS: ");
4925                 for (i=0; sd->handlers[i]; ++i) {
4926                         printf("L%03d ", sd->handlers[i]->handler->nr);
4927                 }
4928                 printf("\n");
4929         }
4930         printf("\n");
4931 }
4932
4933
4934 static void stack_verbose_block_exit(stackdata_t *sd, bool superblockend)
4935 {
4936         printf("%s ", (superblockend) ? "SUPERBLOCKEND" : "END");
4937         stack_verbose_show_block(sd, sd->bptr);
4938         printf("\n");
4939 }
4940
4941 static void stack_verbose_show_state(stackdata_t *sd, instruction *iptr, stackptr curstack)
4942 {
4943         stackptr sp;
4944         s4       i;
4945         s4       depth;
4946         varinfo *v;
4947         stackptr *stack;
4948
4949         printf("    javalocals ");
4950         show_javalocals_array(sd->jd, sd->javalocals, sd->maxlocals, SHOW_STACK);
4951         printf(" stack [");
4952
4953         for(i = 0, sp = curstack; sp; sp = sp->prev)
4954                 i++;
4955         depth = i;
4956
4957         stack = MNEW(stackptr, depth);
4958         for(sp = curstack; sp; sp = sp->prev)
4959                 stack[--i] = sp;
4960
4961         for(i=0; i<depth; ++i) {
4962                 if (i)
4963                         putchar(' ');
4964                 sp = stack[i];
4965                 v = &(sd->var[sp->varnum]);
4966
4967                 if (v->flags & INOUT)
4968                         putchar('I');
4969                 if (v->flags & PREALLOC)
4970                         putchar('A');
4971                 printf("%d:%c", sp->varnum, show_jit_type_letters[sp->type]);
4972                 if (v->type == TYPE_RET) {
4973                         printf("(L%03d)", v->vv.retaddr->nr);
4974                 }
4975         }
4976         printf("] ... ");
4977         if (iptr)
4978                 show_icmd(sd->jd, iptr, false, SHOW_PARSE);
4979         printf("\n");
4980 }
4981 #endif
4982
4983
4984 /*
4985  * These are local overrides for various environment variables in Emacs.
4986  * Please do not remove this and leave it at the end of the file, where
4987  * Emacs will automagically detect them.
4988  * ---------------------------------------------------------------------
4989  * Local variables:
4990  * mode: c
4991  * indent-tabs-mode: t
4992  * c-basic-offset: 4
4993  * tab-width: 4
4994  * End:
4995  * vim:noexpandtab:sw=4:ts=4:
4996  */