src/vm/jit/allocator/simplereg.c

   1 /* src/vm/jit/allocator/simplereg.c - register allocator
   2
   3    Copyright (C) 1996-2005, 2007 R. Grafl, A. Krall, C. Kruegel, C. Oates,
   4    R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
   5    C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
   6    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., 59 Temple Place - Suite 330, Boston, MA
  23    02111-1307, USA.
  24
  25    $Id: simplereg.c 7766 2007-04-19 13:24:48Z michi $
  26
  27 */
  28
  29
  30 #include "config.h"
  31
  32 #include <assert.h>
  33
  34 #include "vm/types.h"
  35
  36 #include "arch.h"
  37 #include "md-abi.h"
  38
  39 #include "mm/memory.h"
  40
  41 #include "vm/builtin.h"
  42 #include "vm/exceptions.h"
  43 #include "vm/resolve.h"
  44 #include "vm/stringlocal.h"
  45
  46 #include "vm/jit/abi.h"
  47 #include "vm/jit/reg.h"
  48 #include "vm/jit/show.h"
  49 #include "vm/jit/allocator/simplereg.h"
  50
  51 #include "vmcore/method.h"
  52 #include "vmcore/options.h"
  53
  54
  55 #if 0
  56 #    define LOG(args) printf args
  57 #else
  58 #    define LOG(args)
  59 #endif
  60
  61
  62 /* function prototypes for this file ******************************************/
  63
  64 static void simplereg_allocate_interfaces(jitdata *jd);
  65 static void simplereg_allocate_locals(jitdata *jd);
  66 static void simplereg_allocate_temporaries(jitdata *jd);
  67
  68
  69 /* total number of registers */
  70
  71 #if defined(HAS_ADDRESS_REGISTER_FILE)
  72 #define TOTAL_REG_CNT  (INT_REG_CNT + FLT_REG_CNT + ADR_REG_CNT)
  73 #else
  74 #define TOTAL_REG_CNT  (INT_REG_CNT + FLT_REG_CNT)
  75 #endif
  76
  77
  78 /* macros for handling register stacks ****************************************/
  79
  80 #define AVAIL_FRONT(cnt, limit)   ((cnt) < (limit))
  81 #define AVAIL_BACK(cnt)           ((cnt) > 0)
  82
  83 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
  84 #define AVAIL_FRONT_INT(cnt, limit)   ((cnt) < (limit) - intregsneeded)
  85 #define AVAIL_BACK_INT(cnt)           ((cnt) > intregsneeded)
  86 #else
  87 #define AVAIL_FRONT_INT(cnt, limit)   AVAIL_FRONT(cnt, limit)
  88 #define AVAIL_BACK_INT(cnt)           AVAIL_BACK(cnt)
  89 #endif
  90
  91 #define POP_FRONT(stk, cnt, reg)   do {  reg = stk[cnt++];    } while (0)
  92 #define POP_BACK(stk, cnt, reg)    do {  reg = stk[--cnt];    } while (0)
  93 #define PUSH_FRONT(stk, cnt, reg)  do {  stk[--cnt] = (reg);  } while (0)
  94 #define PUSH_BACK(stk, cnt, reg)   do {  stk[cnt++] = (reg);  } while (0)
  95
  96 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
  97 #define POP_FRONT_INT(stk, cnt, reg)                                 \
  98     do {                                                             \
  99         if (intregsneeded) {                                         \
 100             reg = PACK_REGS(stk[cnt], stk[cnt+1]);                   \
 101             cnt += 2;                                                \
 102         }                                                            \
 103         else                                                         \
 104             POP_FRONT(stk, cnt, reg);                                \
 105     } while (0)
 106 #else
 107 #define POP_FRONT_INT(stk, cnt, reg)  POP_FRONT(stk, cnt, reg)
 108 #endif
 109
 110 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 111 #define POP_BACK_INT(stk, cnt, reg)                                  \
 112     do {                                                             \
 113         if (intregsneeded) {                                         \
 114             cnt -= 2;                                                \
 115             reg = PACK_REGS(stk[cnt], stk[cnt+1]);                   \
 116         }                                                            \
 117         else                                                         \
 118             POP_BACK(stk, cnt, reg);                                 \
 119     } while (0)
 120 #else
 121 #define POP_BACK_INT(stk, cnt, reg)  POP_BACK(stk, cnt, reg)
 122 #endif
 123
 124 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 125 #define PUSH_BACK_INT(stk, cnt, reg)                                 \
 126     do {                                                             \
 127         if (intregsneeded) {                                         \
 128             stk[cnt] = GET_LOW_REG(reg);                             \
 129             stk[cnt + 1] = GET_HIGH_REG(reg);                        \
 130             cnt += 2;                                                \
 131         }                                                            \
 132         else                                                         \
 133             PUSH_BACK(stk, cnt, reg);                                \
 134     } while (0)
 135 #else
 136 #define PUSH_BACK_INT(stk, cnt, reg)  PUSH_BACK(stk, cnt, reg)
 137 #endif
 138
 139 #define AVAIL_ARG_FLT  AVAIL_FRONT(rd->argfltreguse, FLT_ARG_CNT)
 140 #define AVAIL_TMP_FLT  AVAIL_BACK(rd->tmpfltreguse)
 141 #define AVAIL_SAV_FLT  AVAIL_BACK(rd->savfltreguse)
 142
 143 #define AVAIL_ARG_ADR  AVAIL_FRONT(rd->argadrreguse, ADR_ARG_CNT)
 144 #define AVAIL_TMP_ADR  AVAIL_BACK(rd->tmpadrreguse)
 145 #define AVAIL_SAV_ADR  AVAIL_BACK(rd->savadrreguse)
 146
 147 #define AVAIL_ARG_INT  AVAIL_FRONT_INT(rd->argintreguse, INT_ARG_CNT)
 148 #define AVAIL_TMP_INT  AVAIL_BACK_INT(rd->tmpintreguse)
 149 #define AVAIL_SAV_INT  AVAIL_BACK_INT(rd->savintreguse)
 150
 151 #define AVAIL_FREE_ARG_FLT  AVAIL_BACK(rd->freeargflttop)
 152 #define AVAIL_FREE_TMP_FLT  AVAIL_BACK(rd->freetmpflttop)
 153 #define AVAIL_FREE_SAV_FLT  AVAIL_BACK(rd->freesavflttop)
 154
 155 #define AVAIL_FREE_ARG_ADR  AVAIL_BACK(rd->freeargadrtop)
 156 #define AVAIL_FREE_TMP_ADR  AVAIL_BACK(rd->freetmpadrtop)
 157 #define AVAIL_FREE_SAV_ADR  AVAIL_BACK(rd->freesavadrtop)
 158
 159 #define AVAIL_FREE_ARG_INT  AVAIL_BACK_INT(rd->freearginttop)
 160 #define AVAIL_FREE_TMP_INT  AVAIL_BACK_INT(rd->freetmpinttop)
 161 #define AVAIL_FREE_SAV_INT  AVAIL_BACK_INT(rd->freesavinttop)
 162
 163 #define TAKE_ARG_FLT(r)  POP_FRONT(abi_registers_float_argument, rd->argfltreguse, r)
 164 #define TAKE_TMP_FLT(r)  POP_BACK(rd->tmpfltregs, rd->tmpfltreguse, r)
 165 #define TAKE_SAV_FLT(r)  POP_BACK(rd->savfltregs, rd->savfltreguse, r)
 166
 167 #define TAKE_ARG_ADR(r)  POP_FRONT(rd->argadrregs, rd->argadrreguse, r)
 168 #define TAKE_TMP_ADR(r)  POP_BACK(rd->tmpadrregs, rd->tmpadrreguse, r)
 169 #define TAKE_SAV_ADR(r)  POP_BACK(rd->savadrregs, rd->savadrreguse, r)
 170
 171 #define TAKE_ARG_INT(r)  POP_FRONT_INT(abi_registers_integer_argument, rd->argintreguse, r)
 172 #define TAKE_TMP_INT(r)  POP_BACK_INT(rd->tmpintregs, rd->tmpintreguse, r)
 173 #define TAKE_SAV_INT(r)  POP_BACK_INT(rd->savintregs, rd->savintreguse, r)
 174
 175 #define TAKE_FREE_ARG_FLT(r)  POP_BACK(rd->freeargfltregs, rd->freeargflttop, r)
 176 #define TAKE_FREE_TMP_FLT(r)  POP_BACK(rd->freetmpfltregs, rd->freetmpflttop, r)
 177 #define TAKE_FREE_SAV_FLT(r)  POP_BACK(rd->freesavfltregs, rd->freesavflttop, r)
 178
 179 #define TAKE_FREE_ARG_ADR(r)  POP_BACK(rd->freeargadrregs, rd->freeargadrtop, r)
 180 #define TAKE_FREE_TMP_ADR(r)  POP_BACK(rd->freetmpadrregs, rd->freetmpadrtop, r)
 181 #define TAKE_FREE_SAV_ADR(r)  POP_BACK(rd->freesavadrregs, rd->freesavadrtop, r)
 182
 183 #define TAKE_FREE_ARG_INT(r)  POP_BACK_INT(rd->freeargintregs, rd->freearginttop, r)
 184 #define TAKE_FREE_TMP_INT(r)  POP_BACK_INT(rd->freetmpintregs, rd->freetmpinttop, r)
 185 #define TAKE_FREE_SAV_INT(r)  POP_BACK_INT(rd->freesavintregs, rd->freesavinttop, r)
 186
 187 #define PUSH_FREE_ARG_FLT(r)  PUSH_BACK(rd->freeargfltregs, rd->freeargflttop, r)
 188 #define PUSH_FREE_TMP_FLT(r)  PUSH_BACK(rd->freetmpfltregs, rd->freetmpflttop, r)
 189 #define PUSH_FREE_SAV_FLT(r)  PUSH_BACK(rd->freesavfltregs, rd->freesavflttop, r)
 190
 191 #define PUSH_FREE_ARG_ADR(r)  PUSH_BACK(rd->freeargadrregs, rd->freeargadrtop, r)
 192 #define PUSH_FREE_TMP_ADR(r)  PUSH_BACK(rd->freetmpadrregs, rd->freetmpadrtop, r)
 193 #define PUSH_FREE_SAV_ADR(r)  PUSH_BACK(rd->freesavadrregs, rd->freesavadrtop, r)
 194
 195 #define PUSH_FREE_ARG_INT(r)  PUSH_BACK_INT(rd->freeargintregs, rd->freearginttop, r)
 196 #define PUSH_FREE_TMP_INT(r)  PUSH_BACK_INT(rd->freetmpintregs, rd->freetmpinttop, r)
 197 #define PUSH_FREE_SAV_INT(r)  PUSH_BACK_INT(rd->freesavintregs, rd->freesavinttop, r)
 198
 199
 200 /* macros for allocating memory slots ****************************************/
 201
 202 #define NEW_MEM_SLOT(r)                                              \
 203     do {                                                             \
 204         (r) = rd->memuse;                                            \
 205         rd->memuse += memneeded + 1;                                 \
 206     } while (0)
 207
 208 #define NEW_MEM_SLOT_ALIGNED(r)                                      \
 209     do {                                                             \
 210         if ( (memneeded) && (rd->memuse & 1))                        \
 211             rd->memuse++;                                            \
 212         (r) = rd->memuse;                                            \
 213         rd->memuse += memneeded + 1;                                 \
 214     } while (0)
 215
 216 #define NEW_MEM_SLOT_ALIGNED_REUSE_PADDING(r)                        \
 217     do {                                                             \
 218         if ( (memneeded) && (rd->memuse & 1)) {                      \
 219                         PUSH_BACK(rd->freemem, rd->freememtop, rd->memuse);      \
 220             rd->memuse++;                                            \
 221                 }                                                            \
 222         (r) = rd->memuse;                                            \
 223         rd->memuse += memneeded + 1;                                 \
 224     } while (0)
 225
 226 #if defined(ALIGN_LONGS_IN_MEMORY)
 227 #define NEW_MEM_SLOT_INT_LNG(r)  NEW_MEM_SLOT_ALIGNED(r)
 228 #else
 229 #define NEW_MEM_SLOT_INT_LNG(r)  NEW_MEM_SLOT(r)
 230 #endif
 231
 232 #if defined(ALIGN_DOUBLES_IN_MEMORY)
 233 #define NEW_MEM_SLOT_FLT_DBL(r)  NEW_MEM_SLOT_ALIGNED(r)
 234 #else
 235 #define NEW_MEM_SLOT_FLT_DBL(r)  NEW_MEM_SLOT(r)
 236 #endif
 237
 238 #if defined(ALIGN_LONGS_IN_MEMORY) || defined(ALIGN_DOUBLES_IN_MEMORY)
 239 #define NEW_MEM_SLOT_REUSE_PADDING(r)  NEW_MEM_SLOT_ALIGNED_REUSE_PADDING(r)
 240 #else
 241 #define NEW_MEM_SLOT_REUSE_PADDING(r)  NEW_MEM_SLOT(r)
 242 #endif
 243
 244
 245 /* macros for creating/freeing temporary variables ***************************/
 246
 247 #define NEW_TEMP_REG(index)                                          \
 248     if ( ((index) >= jd->localcount)                                 \
 249          && (!(VAR(index)->flags & (INOUT | PREALLOC))) )            \
 250         simplereg_new_temp(jd, (index))
 251
 252
 253 #define FREE_TEMP_REG(index)                                         \
 254     if (((index) > jd->localcount)                                   \
 255         && (!(VAR(index)->flags & (PREALLOC))))                      \
 256         simplereg_free_temp(jd, (index))
 257
 258
 259 /* macro for getting a unique register index *********************************/
 260
 261 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 262 #define REG_INDEX_NON_ADR(regoff, type)                              \
 263     (IS_FLT_DBL_TYPE(type) ? (INT_REG_CNT + (regoff)) : (GET_LOW_REG(regoff)))
 264 #else
 265 #define REG_INDEX_NON_ADR(regoff, type)                              \
 266     (IS_FLT_DBL_TYPE(type) ? (INT_REG_CNT + (regoff)) : (regoff))
 267 #endif
 268
 269 #if defined(HAS_ADDRESS_REGISTER_FILE)
 270 #define REG_INDEX(regoff, type)                                      \
 271     (IS_ADR_TYPE(type) ? (regoff) : (ADR_REG_CNT + REG_INDEX_NON_ADR(regoff, type)))
 272 #else
 273 #define REG_INDEX(regoff, type)  REG_INDEX_NON_ADR(regoff, type)
 274 #endif
 275
 276
 277 /* regalloc ********************************************************************
 278
 279    Does a simple register allocation.
 280
 281 *******************************************************************************/
 282
 283 bool regalloc(jitdata *jd)
 284 {
 285         /* There is a problem with the use of unused float argument
 286            registers in leafmethods for stackslots on c7 (2 * Dual Core
 287            AMD Opteron(tm) Processor 270) - runtime for the jvm98 _mtrt
 288            benchmark is heaviliy increased. This could be prevented by
 289            setting rd->argfltreguse to FLT_ARG_CNT before calling
 290            simplereg_allocate_temporaries and setting it back to the original
 291            value before calling simplereg_allocate_locals.  */
 292
 293         simplereg_allocate_interfaces(jd);
 294         simplereg_allocate_temporaries(jd);
 295         simplereg_allocate_locals(jd);
 296
 297         /* everthing's ok */
 298
 299         return true;
 300 }
 301
 302
 303 /* simplereg_allocate_interfaces ***********************************************
 304
 305    Allocates registers for all interface variables.
 306
 307 *******************************************************************************/
 308
 309 static void simplereg_allocate_interfaces(jitdata *jd)
 310 {
 311         methodinfo   *m;
 312         codegendata  *cd;
 313         registerdata *rd;
 314
 315         int     s, t, tt, saved;
 316         int     intalloc, fltalloc; /* Remember allocated Register/Memory offset */
 317                         /* in case more vars are packed into this interface slot */
 318         int             memneeded = 0;
 319         /* Allocate LNG and DBL types first to ensure 2 memory slots or          */
 320         /* registers on HAS_4BYTE_STACKSLOT architectures.                       */
 321         int     typeloop[] = { TYPE_LNG, TYPE_DBL, TYPE_INT, TYPE_FLT, TYPE_ADR };
 322         int     flags, regoff;
 323 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 324         int             intregsneeded;
 325 #endif
 326
 327         /* get required compiler data */
 328
 329         m  = jd->m;
 330         cd = jd->cd;
 331         rd = jd->rd;
 332
 333         /* rd->memuse was already set in stack.c to allocate stack space
 334            for passing arguments to called methods. */
 335
 336 #if defined(__I386__)
 337         if (checksync && (m->flags & ACC_SYNCHRONIZED)) {
 338                 /* reserve 0(%esp) for Monitorenter/exit Argument on i386 */
 339                 if (rd->memuse < 1)
 340                         rd->memuse = 1;
 341         }
 342 #endif
 343
 344         if (jd->isleafmethod) {
 345                 /* Reserve argument register, which will be used for Locals acting */
 346                 /* as Parameters */
 347                 if (rd->argintreguse < m->parseddesc->argintreguse)
 348                         rd->argintreguse = m->parseddesc->argintreguse;
 349                 if (rd->argfltreguse < m->parseddesc->argfltreguse)
 350                         rd->argfltreguse = m->parseddesc->argfltreguse;
 351 #ifdef HAS_ADDRESS_REGISTER_FILE
 352                 if (rd->argadrreguse < m->parseddesc->argadrreguse)
 353                         rd->argadrreguse = m->parseddesc->argadrreguse;
 354 #endif
 355         }
 356
 357         for (s = 0; s < jd->maxinterfaces; s++) {
 358                 intalloc = -1; fltalloc = -1;
 359
 360                 /* check if the interface at this stack depth must be a SAVEDVAR */
 361
 362                 saved = 0;
 363
 364                 for (tt = 0; tt <=4; tt++) {
 365                         if ((t = jd->interface_map[s * 5 + tt].flags) != UNUSED) {
 366                                 saved |= t & SAVEDVAR;
 367                         }
 368                 }
 369
 370                 /* allocate reg/mem for each type the interface is used as */
 371
 372                 for (tt = 0; tt <= 4; tt++) {
 373                         t = typeloop[tt];
 374                         if (jd->interface_map[s * 5 + t].flags == UNUSED)
 375                                 continue;
 376
 377                         flags = saved;
 378                         regoff = -1; /* initialize to invalid value */
 379
 380 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 381                         intregsneeded = (IS_2_WORD_TYPE(t)) ? 1 : 0;
 382 #endif
 383
 384 #if defined(HAS_4BYTE_STACKSLOT)
 385                         memneeded = (IS_2_WORD_TYPE(t)) ? 1 : 0;
 386 #endif
 387
 388                         if (!saved) {
 389 #if defined(HAS_ADDRESS_REGISTER_FILE)
 390                                 if (IS_ADR_TYPE(t)) {
 391                                         if (!jd->isleafmethod && AVAIL_ARG_ADR) {
 392                                                 flags |= ARGREG;
 393                                                 TAKE_ARG_ADR(regoff);
 394                                         }
 395                                         else if (AVAIL_TMP_ADR) {
 396                                                 TAKE_TMP_ADR(regoff);
 397                                         }
 398                                         else if (AVAIL_SAV_ADR) {
 399                                                 flags |= SAVREG;
 400                                                 TAKE_SAV_ADR(regoff);
 401                                         }
 402                                         else {
 403                                                 flags |= INMEMORY;
 404                                                 regoff = rd->memuse++;
 405                                         }
 406                                 }
 407                                 else /* !IS_ADR_TYPE */
 408 #endif /* defined(HAS_ADDRESS_REGISTER_FILE) */
 409                                 {
 410                                         if (IS_FLT_DBL_TYPE(t)) {
 411                                                 if (fltalloc >= 0) {
 412                                                         /* Reuse memory slot(s)/register(s) for shared interface slots */
 413                                                         flags |= jd->interface_map[fltalloc].flags & ~SAVEDVAR;
 414                                                         regoff = jd->interface_map[fltalloc].regoff;
 415                                                 }
 416                                                 else if (AVAIL_ARG_FLT) {
 417                                                         flags |= ARGREG;
 418                                                         TAKE_ARG_FLT(regoff);
 419                                                 }
 420                                                 else if (AVAIL_TMP_FLT) {
 421                                                         TAKE_TMP_FLT(regoff);
 422                                                 }
 423                                                 else if (AVAIL_SAV_FLT) {
 424                                                         flags |= SAVREG;
 425                                                         TAKE_SAV_FLT(regoff);
 426                                                 }
 427                                                 else {
 428                                                         flags |= INMEMORY;
 429                                                         NEW_MEM_SLOT_FLT_DBL(regoff);
 430                                                 }
 431                                                 fltalloc = s * 5 + t;
 432                                         }
 433                                         else { /* !IS_FLT_DBL_TYPE(t) */
 434 #if defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 435                                                 /*
 436                                                  * for i386 put all longs in memory
 437                                                  */
 438                                                 if (IS_2_WORD_TYPE(t)) {
 439                                                         flags |= INMEMORY;
 440                                                         NEW_MEM_SLOT_INT_LNG(regoff);
 441                                                 }
 442                                                 else
 443 #endif /* defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE...GISTERS) */
 444                                                         if (intalloc >= 0) {
 445                                                                 /* Reuse memory slot(s)/register(s) for shared interface slots */
 446                                                                 flags |= jd->interface_map[intalloc].flags & ~SAVEDVAR;
 447                                                                 regoff = jd->interface_map[intalloc].regoff;
 448 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 449                                                                 /* reuse lower half */
 450                                                                 if (!(flags & INMEMORY)
 451                                                                                 && IS_2_WORD_TYPE(intalloc % 5))
 452                                                                         regoff = GET_LOW_REG(regoff);
 453 #endif
 454                                                         }
 455                                                         else {
 456                                                                 if (AVAIL_ARG_INT) {
 457                                                                         flags |= ARGREG;
 458                                                                         TAKE_ARG_INT(regoff);
 459                                                                 }
 460                                                                 else if (AVAIL_TMP_INT) {
 461                                                                         TAKE_TMP_INT(regoff);
 462                                                                 }
 463                                                                 else if (AVAIL_SAV_INT) {
 464                                                                         flags |= SAVREG;
 465                                                                         TAKE_SAV_INT(regoff);
 466                                                                 }
 467                                                                 else {
 468                                                                         flags |= INMEMORY;
 469                                                                         NEW_MEM_SLOT_INT_LNG(regoff);
 470                                                                 }
 471                                                         }
 472
 473                                                 intalloc = s * 5 + t;
 474                                         } /* if (IS_FLT_DBL_TYPE(t)) */
 475                                 }
 476                         }
 477                         else { /* (saved) */
 478                                 /* now the same like above, but without a chance to take a temporary register */
 479 #ifdef HAS_ADDRESS_REGISTER_FILE
 480                                 if (IS_ADR_TYPE(t)) {
 481                                         if (AVAIL_SAV_ADR) {
 482                                                 TAKE_SAV_ADR(regoff);
 483                                         }
 484                                         else {
 485                                                 flags |= INMEMORY;
 486                                                 regoff = rd->memuse++;
 487                                         }
 488                                 }
 489                                 else
 490 #endif
 491                                 {
 492                                         if (IS_FLT_DBL_TYPE(t)) {
 493                                                 if (fltalloc >= 0) {
 494                                                         flags |= jd->interface_map[fltalloc].flags & ~SAVEDVAR;
 495                                                         regoff = jd->interface_map[fltalloc].regoff;
 496                                                 }
 497                                                 else {
 498                                                         if (AVAIL_SAV_FLT) {
 499                                                                 TAKE_SAV_FLT(regoff);
 500                                                         }
 501                                                         else {
 502                                                                 flags |= INMEMORY;
 503                                                                 NEW_MEM_SLOT_FLT_DBL(regoff);
 504                                                         }
 505                                                 }
 506                                                 fltalloc = s * 5 + t;
 507                                         }
 508                                         else { /* IS_INT_LNG */
 509 #if defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 510                                                 /*
 511                                                  * for i386 put all longs in memory
 512                                                  */
 513                                                 if (IS_2_WORD_TYPE(t)) {
 514                                                         flags |= INMEMORY;
 515                                                         NEW_MEM_SLOT_INT_LNG(regoff);
 516                                                 }
 517                                                 else
 518 #endif
 519                                                 {
 520                                                         if (intalloc >= 0) {
 521                                                                 flags |= jd->interface_map[intalloc].flags & ~SAVEDVAR;
 522                                                                 regoff = jd->interface_map[intalloc].regoff;
 523 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 524                                                                 /*  reuse lower half */
 525                                                                 if (!(flags & INMEMORY)
 526                                                                                 && IS_2_WORD_TYPE(intalloc % 5))
 527                                                                         regoff = GET_LOW_REG(regoff);
 528 #endif
 529                                                         }
 530                                                         else {
 531                                                                 if (AVAIL_SAV_INT) {
 532                                                                         TAKE_SAV_INT(regoff);
 533                                                                 }
 534                                                                 else {
 535                                                                         flags |= INMEMORY;
 536                                                                         NEW_MEM_SLOT_INT_LNG(regoff);
 537                                                                 }
 538                                                         }
 539                                                         intalloc = s*5 + t;
 540                                                 }
 541                                         } /* if (IS_FLT_DBL_TYPE(t) else */
 542                                 } /* if (IS_ADR_TYPE(t)) else */
 543                         } /* if (saved) else */
 544                         /* if (type >= 0) */
 545
 546                         assert(regoff >= 0);
 547                         jd->interface_map[5*s + t].flags = flags | INOUT;
 548                         jd->interface_map[5*s + t].regoff = regoff;
 549                 } /* for t */
 550         } /* for s */
 551 }
 552
 553
 554 /* simplereg_allocate_locals_leafmethod ****************************************
 555
 556    Allocates registers for all local variables of a leafmethod.
 557
 558 *******************************************************************************/
 559
 560 static void simplereg_allocate_locals_leafmethod(jitdata *jd)
 561 {
 562         methodinfo   *m;
 563         codegendata  *cd;
 564         registerdata *rd;
 565         methoddesc *md;
 566
 567         int     p, s, t, tt, varindex;
 568         int     intalloc, fltalloc;
 569         varinfo *v;
 570         int     intregsneeded = 0;
 571         int     memneeded = 0;
 572         int     typeloop[] = { TYPE_LNG, TYPE_DBL, TYPE_INT, TYPE_FLT, TYPE_ADR };
 573         int     fargcnt, iargcnt;
 574 #ifdef HAS_ADDRESS_REGISTER_FILE
 575         int     aargcnt;
 576 #endif
 577
 578         /* get required compiler data */
 579
 580         m  = jd->m;
 581         cd = jd->cd;
 582         rd = jd->rd;
 583
 584         md = m->parseddesc;
 585
 586         iargcnt = rd->argintreguse;
 587         fargcnt = rd->argfltreguse;
 588 #ifdef HAS_ADDRESS_REGISTER_FILE
 589         aargcnt = rd->argadrreguse;
 590 #endif
 591         for (p = 0, s = 0; s < jd->maxlocals; s++, p++) {
 592                 intalloc = -1; fltalloc = -1;
 593                 for (tt = 0; tt <= 4; tt++) {
 594                         t = typeloop[tt];
 595                         varindex = jd->local_map[s * 5 + t];
 596                         if (varindex == UNUSED)
 597                                 continue;
 598
 599                         v = VAR(varindex);
 600
 601 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 602                         intregsneeded = (IS_2_WORD_TYPE(t)) ? 1 : 0;
 603 #endif
 604 #if defined(HAS_4BYTE_STACKSLOT)
 605                         memneeded = (IS_2_WORD_TYPE(t)) ? 1 : 0;
 606 #endif
 607
 608                         /*
 609                          *  The order of
 610                          *
 611                          *  #ifdef HAS_ADDRESS_REGISTER_FILE
 612                          *  if (IS_ADR_TYPE) {
 613                          *  ...
 614                          *  } else
 615                          *  #endif
 616                          *  if (IS_FLT_DBL) {
 617                          *  ...
 618                          *  } else { / int & lng
 619                          *  ...
 620                          *  }
 621                          *
 622                          *  must not to be changed!
 623                          */
 624
 625 #ifdef HAS_ADDRESS_REGISTER_FILE
 626                         if (IS_ADR_TYPE(t)) {
 627                                 if ((p < md->paramcount) && !md->params[p].inmemory) {
 628                                         v->flags = 0;
 629                                         v->vv.regoff = rd->argadrregs[md->params[p].regoff];
 630                                 }
 631                                 else if (AVAIL_TMP_ADR) {
 632                                         v->flags = 0;
 633                                         TAKE_TMP_ADR(v->vv.regoff);
 634                                 }
 635                                 /* use unused argument registers as local registers */
 636                                 else if ((p >= md->paramcount) &&
 637                                                  (aargcnt < ADR_ARG_CNT))
 638                                 {
 639                                         v->flags = 0;
 640                                         POP_FRONT(rd->argadrregs, aargcnt, v->vv.regoff);
 641                                 }
 642                                 else if (AVAIL_SAV_ADR) {
 643                                         v->flags = 0;
 644                                         TAKE_SAV_ADR(v->vv.regoff);
 645                                 }
 646                                 else {
 647                                         v->flags |= INMEMORY;
 648                                         v->vv.regoff = rd->memuse++;
 649                                 }
 650                         }
 651                         else {
 652 #endif
 653                                 if (IS_FLT_DBL_TYPE(t)) {
 654                                         if (fltalloc >= 0) {
 655                                                 v->flags = VAR(fltalloc)->flags;
 656                                                 v->vv.regoff = VAR(fltalloc)->vv.regoff;
 657                                         }
 658 #if !defined(SUPPORT_PASS_FLOATARGS_IN_INTREGS)
 659                                         /* We can only use float arguments as local variables,
 660                                          * if we do not pass them in integer registers. */
 661                                         else if ((p < md->paramcount) && !md->params[p].inmemory) {
 662                                                 v->flags = 0;
 663                                                 v->vv.regoff = md->params[p].regoff;
 664                                         }
 665 #endif
 666                                         else if (AVAIL_TMP_FLT) {
 667                                                 v->flags = 0;
 668                                                 TAKE_TMP_FLT(v->vv.regoff);
 669                                         }
 670                                         /* use unused argument registers as local registers */
 671                                         else if ((p >= md->paramcount) && (fargcnt < FLT_ARG_CNT)) {
 672                                                 v->flags = 0;
 673                                                 POP_FRONT(abi_registers_float_argument,
 674                                                                   fargcnt, v->vv.regoff);
 675                                         }
 676                                         else if (AVAIL_SAV_FLT) {
 677                                                 v->flags = 0;
 678                                                 TAKE_SAV_FLT(v->vv.regoff);
 679                                         }
 680                                         else {
 681                                                 v->flags = INMEMORY;
 682                                                 NEW_MEM_SLOT_FLT_DBL(v->vv.regoff);
 683                                         }
 684                                         fltalloc = jd->local_map[s * 5 + t];
 685
 686                                 }
 687                                 else {
 688 #if defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 689                                         /*
 690                                          * for i386 put all longs in memory
 691                                          */
 692                                         if (IS_2_WORD_TYPE(t)) {
 693                                                 v->flags = INMEMORY;
 694                                                 NEW_MEM_SLOT_INT_LNG(v->vv.regoff);
 695                                         }
 696                                         else
 697 #endif
 698                                         {
 699                                                 if (intalloc >= 0) {
 700                                                         v->flags = VAR(intalloc)->flags;
 701 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 702                                                         if (!(v->flags & INMEMORY)
 703                                                                 && IS_2_WORD_TYPE(VAR(intalloc)->type))
 704                                                                 v->vv.regoff = GET_LOW_REG(
 705                                                                                                 VAR(intalloc)->vv.regoff);
 706                                                         else
 707 #endif
 708                                                                 v->vv.regoff = VAR(intalloc)->vv.regoff;
 709                                                 }
 710                                                 else if ((p < md->paramcount) &&
 711                                                                  !md->params[p].inmemory)
 712                                                 {
 713                                                         v->flags = 0;
 714 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 715                                                         if (IS_2_WORD_TYPE(t))
 716                                                                 v->vv.regoff =
 717                                                                         PACK_REGS(GET_LOW_REG(md->params[p].regoff),
 718                                                                                           GET_HIGH_REG(md->params[p].regoff));
 719                                                                 else
 720 #endif
 721                                                                         v->vv.regoff = md->params[p].regoff;
 722                                                 }
 723                                                 else if (AVAIL_TMP_INT) {
 724                                                         v->flags = 0;
 725                                                         TAKE_TMP_INT(v->vv.regoff);
 726                                                 }
 727                                                 /*
 728                                                  * use unused argument registers as local registers
 729                                                  */
 730                                                 else if ((p >= m->parseddesc->paramcount) &&
 731                                                                  (iargcnt + intregsneeded < INT_ARG_CNT))
 732                                                 {
 733                                                         v->flags = 0;
 734                                                         POP_FRONT_INT(abi_registers_integer_argument,
 735                                                                                   iargcnt, v->vv.regoff);
 736                                                 }
 737                                                 else if (AVAIL_SAV_INT) {
 738                                                         v->flags = 0;
 739                                                         TAKE_SAV_INT(v->vv.regoff);
 740                                                 }
 741                                                 else {
 742                                                         v->flags = INMEMORY;
 743                                                         NEW_MEM_SLOT_INT_LNG(v->vv.regoff);
 744                                                 }
 745                                         }
 746                                         intalloc = jd->local_map[s * 5 + t];
 747                                 }
 748 #ifdef HAS_ADDRESS_REGISTER_FILE
 749                         }
 750 #endif
 751                 } /* for (tt=0;...) */
 752
 753                 /* If the current parameter is a 2-word type, the next local slot */
 754                 /* is skipped.                                                    */
 755
 756                 if (p < md->paramcount)
 757                         if (IS_2_WORD_TYPE(md->paramtypes[p].type))
 758                                 s++;
 759         }
 760 }
 761
 762 /* simplereg_allocate_locals ***************************************************
 763
 764    Allocates registers for all local variables.
 765
 766 *******************************************************************************/
 767
 768 static void simplereg_allocate_locals(jitdata *jd)
 769 {
 770         codegendata  *cd;
 771         registerdata *rd;
 772
 773         int     s, t, tt, varindex;
 774         int     intalloc, fltalloc;
 775         varinfo *v;
 776         int     memneeded = 0;
 777         int     typeloop[] = { TYPE_LNG, TYPE_DBL, TYPE_INT, TYPE_FLT, TYPE_ADR };
 778 #ifdef SUPPORT_COMBINE_INTEGER_REGISTERS
 779         s4 intregsneeded;
 780 #endif
 781
 782         /* get required compiler data */
 783
 784         cd = jd->cd;
 785         rd = jd->rd;
 786
 787         if (jd->isleafmethod) {
 788                 simplereg_allocate_locals_leafmethod(jd);
 789                 return;
 790         }
 791
 792         for (s = 0; s < jd->maxlocals; s++) {
 793                 intalloc = -1; fltalloc = -1;
 794                 for (tt=0; tt<=4; tt++) {
 795                         t = typeloop[tt];
 796
 797                         varindex = jd->local_map[s * 5 + t];
 798                         if (varindex == UNUSED)
 799                                 continue;
 800
 801                         v = VAR(varindex);
 802
 803 #ifdef SUPPORT_COMBINE_INTEGER_REGISTERS
 804                                 intregsneeded = (IS_2_WORD_TYPE(t)) ? 1 : 0;
 805 #endif
 806
 807 #if defined(HAS_4BYTE_STACKSLOT)
 808                                 memneeded = (IS_2_WORD_TYPE(t)) ? 1 : 0;
 809 #endif
 810
 811 #ifdef HAS_ADDRESS_REGISTER_FILE
 812                                 if (IS_ADR_TYPE(t)) {
 813                                         if (AVAIL_SAV_ADR) {
 814                                                 v->flags = 0;
 815                                                 TAKE_SAV_ADR(v->vv.regoff);
 816                                         }
 817                                         else {
 818                                                 v->flags = INMEMORY;
 819                                                 v->vv.regoff = rd->memuse++;
 820                                         }
 821                                 }
 822                                 else {
 823 #endif
 824                                 if (IS_FLT_DBL_TYPE(t)) {
 825                                         if (fltalloc >= 0) {
 826                                                 v->flags = VAR(fltalloc)->flags;
 827                                                 v->vv.regoff = VAR(fltalloc)->vv.regoff;
 828                                         }
 829                                         else if (AVAIL_SAV_FLT) {
 830                                                 v->flags = 0;
 831                                                 TAKE_SAV_FLT(v->vv.regoff);
 832                                         }
 833                                         else {
 834                                                 v->flags = INMEMORY;
 835                                                 NEW_MEM_SLOT_FLT_DBL(v->vv.regoff);
 836                                         }
 837                                         fltalloc = jd->local_map[s * 5 + t];
 838                                 }
 839                                 else {
 840 #if defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 841                                         /*
 842                                          * for i386 put all longs in memory
 843                                          */
 844                                         if (IS_2_WORD_TYPE(t)) {
 845                                                 v->flags = INMEMORY;
 846                                                 NEW_MEM_SLOT_INT_LNG(v->vv.regoff);
 847                                         }
 848                                         else {
 849 #endif
 850                                                 if (intalloc >= 0) {
 851                                                         v->flags = VAR(intalloc)->flags;
 852 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 853                                                         if (!(v->flags & INMEMORY)
 854                                                                 && IS_2_WORD_TYPE(VAR(intalloc)->type))
 855                                                                 v->vv.regoff = GET_LOW_REG(
 856                                                                                             VAR(intalloc)->vv.regoff);
 857                                                         else
 858 #endif
 859                                                                 v->vv.regoff = VAR(intalloc)->vv.regoff;
 860                                                 }
 861                                                 else if (AVAIL_SAV_INT) {
 862                                                         v->flags = 0;
 863                                                         TAKE_SAV_INT(v->vv.regoff);
 864                                                 }
 865                                                 else {
 866                                                         v->flags = INMEMORY;
 867                                                         NEW_MEM_SLOT_INT_LNG(v->vv.regoff);
 868                                                 }
 869 #if defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 870                                         }
 871 #endif
 872                                         intalloc = jd->local_map[s * 5 + t];
 873                                 }
 874 #ifdef HAS_ADDRESS_REGISTER_FILE
 875                                 }
 876 #endif
 877                 }
 878         }
 879 }
 880
 881
 882 static void simplereg_init(jitdata *jd, registerdata *rd)
 883 {
 884         int i;
 885
 886         rd->freememtop = 0;
 887 #if defined(HAS_4BYTE_STACKSLOT)
 888         rd->freememtop_2 = 0;
 889 #endif
 890
 891         rd->freetmpinttop = 0;
 892         rd->freesavinttop = 0;
 893         rd->freetmpflttop = 0;
 894         rd->freesavflttop = 0;
 895 #ifdef HAS_ADDRESS_REGISTER_FILE
 896         rd->freetmpadrtop = 0;
 897         rd->freesavadrtop = 0;
 898 #endif
 899
 900         rd->freearginttop = 0;
 901         rd->freeargflttop = 0;
 902 #ifdef HAS_ADDRESS_REGISTER_FILE
 903         rd->freeargadrtop = 0;
 904 #endif
 905
 906         rd->regisoutvar = DMNEW(int, TOTAL_REG_CNT);
 907         rd->regcopycount = DMNEW(int, TOTAL_REG_CNT);
 908         MZERO(rd->regcopycount, int, TOTAL_REG_CNT);
 909
 910         /* memcopycount is dynamically allocated when needed */
 911
 912         rd->memcopycount = NULL;
 913         rd->memcopycountsize = 0;
 914
 915         rd->intusedinout = DMNEW(int, INT_REG_CNT);
 916         MZERO(rd->intusedinout, int, INT_REG_CNT);
 917         rd->fltusedinout = DMNEW(int, FLT_REG_CNT);
 918         MZERO(rd->fltusedinout, int, FLT_REG_CNT);
 919
 920         /* record the interface registers as used */
 921
 922         for (i=0; i<rd->argintreguse; ++i)
 923                 rd->intusedinout[abi_registers_integer_argument[i]] = 1;
 924         for (i=rd->tmpintreguse; i<INT_TMP_CNT; ++i)
 925                 rd->intusedinout[rd->tmpintregs[i]] = 1;
 926         for (i=rd->savintreguse; i<INT_SAV_CNT; ++i)
 927                 rd->intusedinout[rd->savintregs[i]] = 1;
 928
 929         for (i=0; i<rd->argfltreguse; ++i)
 930                 rd->fltusedinout[abi_registers_float_argument[i]] = 1;
 931         for (i=rd->tmpfltreguse; i<FLT_TMP_CNT; ++i)
 932                 rd->fltusedinout[rd->tmpfltregs[i]] = 1;
 933         for (i=rd->savfltreguse; i<FLT_SAV_CNT; ++i)
 934                 rd->fltusedinout[rd->savfltregs[i]] = 1;
 935
 936 #ifdef HAS_ADDRESS_REGISTER_FILE
 937         rd->adrusedinout = DMNEW(int, ADR_REG_CNT);
 938         MZERO(rd->adrusedinout, int, ADR_REG_CNT);
 939
 940         for (i=0; i<rd->argadrreguse; ++i)
 941                 rd->adrusedinout[rd->argadrregs[i]] = 1;
 942         for (i=rd->tmpadrreguse; i<ADR_TMP_CNT; ++i)
 943                 rd->adrusedinout[rd->tmpadrregs[i]] = 1;
 944         for (i=rd->savadrreguse; i<ADR_SAV_CNT; ++i)
 945                 rd->adrusedinout[rd->savadrregs[i]] = 1;
 946 #endif
 947 }
 948
 949
 950 static void simplereg_init_block(registerdata *rd)
 951 {
 952         int i;
 953
 954         /* remove all interface registers from the free lists */
 955
 956         for (i=0; i<rd->freearginttop; ++i)
 957                 if (rd->intusedinout[rd->freeargintregs[i]]) {
 958                         rd->freeargintregs[i--] = rd->freeargintregs[--rd->freearginttop];
 959                 }
 960         for (i=0; i<rd->freetmpinttop; ++i)
 961                 if (rd->intusedinout[rd->freetmpintregs[i]]) {
 962                         rd->freetmpintregs[i--] = rd->freetmpintregs[--rd->freetmpinttop];
 963                 }
 964         for (i=0; i<rd->freesavinttop; ++i)
 965                 if (rd->intusedinout[rd->freesavintregs[i]]) {
 966                         rd->freesavintregs[i--] = rd->freesavintregs[--rd->freesavinttop];
 967                 }
 968
 969         for (i=0; i<rd->freeargflttop; ++i)
 970                 if (rd->fltusedinout[rd->freeargfltregs[i]]) {
 971                         rd->freeargfltregs[i--] = rd->freeargfltregs[--rd->freeargflttop];
 972                 }
 973         for (i=0; i<rd->freetmpflttop; ++i)
 974                 if (rd->fltusedinout[rd->freetmpfltregs[i]]) {
 975                         rd->freetmpfltregs[i--] = rd->freetmpfltregs[--rd->freetmpflttop];
 976                 }
 977         for (i=0; i<rd->freesavflttop; ++i)
 978                 if (rd->fltusedinout[rd->freesavfltregs[i]]) {
 979                         rd->freesavfltregs[i--] = rd->freesavfltregs[--rd->freesavflttop];
 980                 }
 981
 982 #ifdef HAS_ADDRESS_REGISTER_FILE
 983         for (i=0; i<rd->freeargadrtop; ++i)
 984                 if (rd->adrusedinout[rd->freeargadrregs[i]]) {
 985                         rd->freeargadrregs[i--] = rd->freeargadrregs[--rd->freeargadrtop];
 986                 }
 987         for (i=0; i<rd->freetmpadrtop; ++i)
 988                 if (rd->adrusedinout[rd->freetmpadrregs[i]]) {
 989                         rd->freetmpadrregs[i--] = rd->freetmpadrregs[--rd->freetmpadrtop];
 990                 }
 991         for (i=0; i<rd->freesavadrtop; ++i)
 992                 if (rd->adrusedinout[rd->freesavadrregs[i]]) {
 993                         rd->freesavadrregs[i--] = rd->freesavadrregs[--rd->freesavadrtop];
 994                 }
 995 #endif
 996 }
 997
 998
 999 static void simplereg_new_temp(jitdata *jd, s4 index)
1000 {
1001 #ifdef SUPPORT_COMBINE_INTEGER_REGISTERS
1002         s4 intregsneeded;
1003 #endif
1004         s4 memneeded;
1005         s4 tryagain;
1006         registerdata *rd;
1007         varinfo      *v;
1008
1009         rd = jd->rd;
1010         v = VAR(index);
1011
1012         /* assert that constants are not allocated */
1013
1014         assert(v->type != TYPE_RET);
1015
1016         /* Try to allocate a saved register if there is no temporary one          */
1017         /* available. This is what happens during the second run.                 */
1018         tryagain = (v->flags & SAVEDVAR) ? 1 : 2;
1019
1020 #ifdef SUPPORT_COMBINE_INTEGER_REGISTERS
1021         intregsneeded = (IS_2_WORD_TYPE(v->type)) ? 1 : 0;
1022 #endif
1023
1024 #if defined(HAS_4BYTE_STACKSLOT)
1025         memneeded = (IS_2_WORD_TYPE(v->type)) ? 1 : 0;
1026 #else
1027         memneeded = 0;
1028 #endif
1029
1030         for(; tryagain; --tryagain) {
1031                 if (tryagain == 1) {
1032                         if (!(v->flags & SAVEDVAR))
1033                                 v->flags |= SAVREG;
1034 #ifdef HAS_ADDRESS_REGISTER_FILE
1035                         if (IS_ADR_TYPE(v->type)) {
1036                                 if (AVAIL_FREE_SAV_ADR) {
1037                                         TAKE_FREE_SAV_ADR(v->vv.regoff);
1038                                         return;
1039                                 }
1040                                 else if (AVAIL_SAV_ADR) {
1041                                         TAKE_SAV_ADR(v->vv.regoff);
1042                                         return;
1043                                 }
1044                         }
1045                         else
1046 #endif
1047                         {
1048                                 if (IS_FLT_DBL_TYPE(v->type)) {
1049                                         if (AVAIL_FREE_SAV_FLT) {
1050                                                 TAKE_FREE_SAV_FLT(v->vv.regoff);
1051                                                 return;
1052                                         }
1053                                         else if (AVAIL_SAV_FLT) {
1054                                                 TAKE_SAV_FLT(v->vv.regoff);
1055                                                 return;
1056                                         }
1057                                 }
1058                                 else {
1059 #if defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
1060                                         /*
1061                                          * for i386 put all longs in memory
1062                                          */
1063                                         if (!IS_2_WORD_TYPE(v->type))
1064 #endif
1065                                         {
1066                                                 if (AVAIL_FREE_SAV_INT) {
1067                                                         TAKE_FREE_SAV_INT(v->vv.regoff);
1068                                                         return;
1069                                                 }
1070                                                 else if (AVAIL_SAV_INT) {
1071                                                         TAKE_SAV_INT(v->vv.regoff);
1072                                                         return;
1073                                                 }
1074                                         }
1075                                 }
1076                         }
1077                 }
1078                 else { /* tryagain == 2 */
1079 #ifdef HAS_ADDRESS_REGISTER_FILE
1080                         if (IS_ADR_TYPE(v->type)) {
1081                                 if (AVAIL_FREE_TMP_ADR) {
1082                                         TAKE_FREE_TMP_ADR(v->vv.regoff);
1083                                         return;
1084                                 }
1085                                 else if (AVAIL_TMP_ADR) {
1086                                         TAKE_TMP_ADR(v->vv.regoff);
1087                                         return;
1088                                 }
1089                         }
1090                         else
1091 #endif
1092                         {
1093                                 if (IS_FLT_DBL_TYPE(v->type)) {
1094                                         if (AVAIL_FREE_ARG_FLT) {
1095                                                 v->flags |= ARGREG;
1096                                                 TAKE_FREE_ARG_FLT(v->vv.regoff);
1097                                                 return;
1098                                         }
1099                                         else if (AVAIL_ARG_FLT) {
1100                                                 v->flags |= ARGREG;
1101                                                 TAKE_ARG_FLT(v->vv.regoff);
1102                                                 return;
1103                                         }
1104                                         else if (AVAIL_FREE_TMP_FLT) {
1105                                                 TAKE_FREE_TMP_FLT(v->vv.regoff);
1106                                                 return;
1107                                         }
1108                                         else if (AVAIL_TMP_FLT) {
1109                                                 TAKE_TMP_FLT(v->vv.regoff);
1110                                                 return;
1111                                         }
1112
1113                                 }
1114                                 else {
1115 #if defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
1116                                         /*
1117                                          * for i386 put all longs in memory
1118                                          */
1119                                         if (!IS_2_WORD_TYPE(v->type))
1120 #endif
1121                                         {
1122                                                 if (AVAIL_FREE_ARG_INT) {
1123                                                         v->flags |= ARGREG;
1124                                                         TAKE_FREE_ARG_INT(v->vv.regoff);
1125                                                         return;
1126                                                 }
1127                                                 else if (AVAIL_ARG_INT) {
1128                                                         v->flags |= ARGREG;
1129                                                         TAKE_ARG_INT(v->vv.regoff);
1130                                                         return;
1131                                                 }
1132                                                 else if (AVAIL_FREE_TMP_INT) {
1133                                                         TAKE_FREE_TMP_INT(v->vv.regoff);
1134                                                         return;
1135                                                 }
1136                                                 else if (AVAIL_TMP_INT) {
1137                                                         TAKE_TMP_INT(v->vv.regoff);
1138                                                         return;
1139                                                 }
1140                                         } /* if (!IS_2_WORD_TYPE(s->type)) */
1141                                 } /* if (IS_FLT_DBL_TYPE(s->type)) */
1142                         } /* if (IS_ADR_TYPE(s->type)) */
1143                 } /* if (tryagain == 1) else */
1144         } /* for(; tryagain; --tryagain) */
1145
1146         /* spill to memory */
1147
1148         v->flags |= INMEMORY;
1149
1150 #if defined(HAS_4BYTE_STACKSLOT)
1151         if ((memneeded == 1) && (rd->freememtop_2 > 0))
1152                 POP_BACK(rd->freemem_2, rd->freememtop_2, v->vv.regoff);
1153         else
1154 #endif /*defined(HAS_4BYTE_STACKSLOT) */
1155                 if ((memneeded == 0) && (rd->freememtop > 0))
1156                         POP_BACK(rd->freemem, rd->freememtop, v->vv.regoff);
1157                 else
1158                         NEW_MEM_SLOT_REUSE_PADDING(v->vv.regoff);
1159 }
1160
1161
1162 static void simplereg_free(registerdata *rd, s4 flags, s4 regoff, s4 type)
1163 {
1164         /* assert that constants are not freed */
1165
1166         assert(type != TYPE_RET);
1167
1168         /* if this is a copy of another variable, just decrement the copy counter */
1169
1170         /* XXX split reg/mem variables on arm may need special handling here */
1171
1172         if (flags & INMEMORY) {
1173                 if (flags & INOUT)
1174                         return;
1175
1176                 if (regoff < rd->memcopycountsize && rd->memcopycount[regoff]) {
1177                         rd->memcopycount[regoff]--;
1178                         return;
1179                 }
1180         }
1181         else {
1182                 s4 regindex;
1183
1184                 regindex = REG_INDEX(regoff, type);
1185
1186                 /* do not free interface registers that are needed as outvars */
1187
1188                 if (flags & INOUT) {
1189                         if (rd->regisoutvar[regindex]) {
1190                                 LOG(("DONT FREE f=%02x r=%d t=%d\n", flags, regoff, type));
1191                                 return;
1192                         }
1193
1194                         LOG(("FREEING INVAR f=%02x r=%d t=%d\n", flags, regoff, type));
1195                 }
1196
1197                 if (rd->regcopycount[regindex]) {
1198                         rd->regcopycount[regindex]--;
1199                         return;
1200                 }
1201         }
1202
1203         if (flags & INMEMORY) {
1204 #if defined(HAS_4BYTE_STACKSLOT)
1205                 if (IS_2_WORD_TYPE(type))
1206                         PUSH_BACK(rd->freemem_2, rd->freememtop_2, regoff);
1207                 else
1208 #endif
1209                         PUSH_BACK(rd->freemem, rd->freememtop, regoff);
1210
1211                 return;
1212         }
1213
1214         /* freeing a register */
1215
1216 #ifdef HAS_ADDRESS_REGISTER_FILE
1217         if (IS_ADR_TYPE(type)) {
1218                 if (flags & (SAVEDVAR | SAVREG))
1219                         PUSH_FREE_SAV_ADR(regoff);
1220                 else
1221                         PUSH_FREE_TMP_ADR(regoff);
1222         }
1223 #endif
1224         else if (IS_FLT_DBL_TYPE(type)) {
1225                 if (flags & (SAVEDVAR | SAVREG))
1226                         PUSH_FREE_SAV_FLT(regoff);
1227                 else if (flags & ARGREG)
1228                         PUSH_FREE_ARG_FLT(regoff);
1229                 else
1230                         PUSH_FREE_TMP_FLT(regoff);
1231         }
1232         else { /* IS_INT_LNG_TYPE */
1233 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
1234                 s4 intregsneeded = (IS_2_WORD_TYPE(type)) ? 1 : 0;
1235 #endif
1236
1237                 if (flags & (SAVEDVAR | SAVREG))
1238                         PUSH_FREE_SAV_INT(regoff);
1239                 else if (flags & ARGREG)
1240                         PUSH_FREE_ARG_INT(regoff);
1241                 else
1242                         PUSH_FREE_TMP_INT(regoff);
1243         }
1244 }
1245
1246
1247 static inline void simplereg_free_temp(jitdata *jd, s4 index)
1248 {
1249         varinfo *v;
1250
1251         v = VAR(index);
1252
1253         simplereg_free(jd->rd, v->flags, v->vv.regoff, v->type);
1254 }
1255
1256
1257 static bool simplereg_alloc_dup(jitdata *jd, s4 srcindex, s4 dstindex)
1258 {
1259         varinfo *sv;
1260         varinfo *dv;
1261
1262         /* do not coalesce local variables here */
1263
1264         if (srcindex <= jd->localcount || dstindex <= jd->localcount)
1265                 return false;
1266
1267         sv = VAR(srcindex);
1268         dv = VAR(dstindex);
1269
1270         /* do not coalesce in/out vars or preallocated variables here */
1271
1272         if ((sv->flags | dv->flags) & (INOUT | PREALLOC))
1273                 return false;
1274
1275         /* if the source is in memory, we can coalesce in any case */
1276
1277         if (sv->flags & INMEMORY) {
1278                 dv->flags |= INMEMORY;
1279                 dv->vv.regoff = sv->vv.regoff;
1280                 return true;
1281         }
1282
1283         /* we do not allocate a REG_TMP to a REG_SAV variable */
1284
1285         if ((sv->flags & SAVEDVAR) != (dv->flags & SAVEDVAR))
1286                 return false;
1287
1288         /* coalesce */
1289         dv->vv.regoff = sv->vv.regoff;
1290         dv->flags |= sv->flags & (SAVREG | ARGREG);
1291
1292         return true;
1293 }
1294
1295
1296 /* simplereg_allocate_temporaries **********************************************
1297
1298    Allocate temporary (non-interface, non-local) registers.
1299
1300 *******************************************************************************/
1301
1302 static void simplereg_allocate_temporaries(jitdata *jd)
1303 {
1304         methodinfo         *m;
1305         registerdata       *rd;
1306         s4                  i;
1307         s4                  len;
1308         instruction        *iptr;
1309         basicblock         *bptr;
1310         builtintable_entry *bte;
1311         methoddesc         *md;
1312         s4                 *argp;
1313         varinfo            *v;
1314         s4                  flags;
1315         s4                  regoff;
1316         s4                  type;
1317         s4                  regindex;
1318
1319         /* get required compiler data */
1320
1321         m  = jd->m;
1322         rd = jd->rd;
1323
1324         /* initialize temp registers */
1325
1326         simplereg_init(jd, rd);
1327
1328         bptr = jd->basicblocks;
1329
1330         while (bptr != NULL) {
1331                 if (bptr->flags >= BBREACHED) {
1332
1333                         LOG(("\nallocating block L%03d\n", bptr->nr));
1334
1335                         simplereg_init_block(rd);
1336
1337                         /* assert that all copy counts are zero */
1338
1339 #if !defined(NDEBUG)
1340                         for (i=0; i < TOTAL_REG_CNT; ++i)
1341                                 assert(rd->regcopycount[i] == 0);
1342 #endif
1343
1344                         /* reset outvar flags */
1345
1346                         MZERO(rd->regisoutvar, int, TOTAL_REG_CNT);
1347
1348                         /* set allocation of invars */
1349
1350                         for (i=0; i<bptr->indepth; ++i)
1351                         {
1352                                 v = VAR(bptr->invars[i]);
1353                                 if (v->type == TYPE_RET)
1354                                         continue;
1355
1356                                 v->vv.regoff = jd->interface_map[5*i + v->type].regoff;
1357                                 v->flags  = jd->interface_map[5*i + v->type].flags;
1358
1359                                 if (!(v->flags & INMEMORY))
1360                                         rd->regcopycount[REG_INDEX(v->vv.regoff, v->type)] = 1;
1361                         }
1362
1363                         /* set allocation of outvars */
1364
1365                         for (i=0; i<bptr->outdepth; ++i)
1366                         {
1367                                 v = VAR(bptr->outvars[i]);
1368                                 if (v->type == TYPE_RET)
1369                                         continue;
1370
1371                                 v->vv.regoff = jd->interface_map[5*i + v->type].regoff;
1372                                 v->flags  = jd->interface_map[5*i + v->type].flags;
1373
1374                                 if (!(v->flags & INMEMORY)) {
1375                                         regindex = REG_INDEX(v->vv.regoff, v->type);
1376                                         rd->regcopycount[regindex] = 1;
1377                                         rd->regisoutvar[regindex] = 1;
1378                                 }
1379                         }
1380
1381                         /* free interface registers not used in this block */
1382
1383                         for (i=0; i < 5 * jd->maxinterfaces; ++i) {
1384                                 type = i%5;
1385                                 regoff = jd->interface_map[i].regoff;
1386                                 flags = jd->interface_map[i].flags;
1387
1388                                 if (!(flags & INMEMORY)) {
1389                                         if (!rd->regcopycount[REG_INDEX(regoff, type)]) {
1390                                                 LOG(("MAY REUSE interface register f=%02x r=%d t=%d\n",
1391                                                                         flags, regoff, type));
1392                                                 simplereg_free(rd, flags, regoff, type);
1393
1394                                                 /* mark it, so it is not freed again */
1395                                                 rd->regcopycount[REG_INDEX(regoff, type)] = -1;
1396                                         }
1397                                 }
1398                         }
1399
1400                         /* reset copy counts */
1401
1402                         MZERO(rd->regcopycount, int, TOTAL_REG_CNT);
1403
1404                         /* iterate over ICMDS to allocate temporary variables */
1405
1406                         iptr = bptr->iinstr;
1407                         len = bptr->icount;
1408
1409                         while (--len >= 0)  {
1410
1411                                 switch (iptr->opc) {
1412
1413                                         /* pop 0 push 0 */
1414
1415                                 case ICMD_JSR:
1416                                 case ICMD_NOP:
1417                                 case ICMD_CHECKNULL:
1418                                 case ICMD_IINC:
1419                                 case ICMD_RET:
1420                                 case ICMD_RETURN:
1421                                 case ICMD_GOTO:
1422                                 case ICMD_PUTSTATICCONST:
1423                                 case ICMD_INLINE_START:
1424                                 case ICMD_INLINE_END:
1425                                 case ICMD_INLINE_BODY:
1426                                         break;
1427
1428                                         /* pop 0 push 1 const */
1429
1430                                 case ICMD_ICONST:
1431                                 case ICMD_LCONST:
1432                                 case ICMD_FCONST:
1433                                 case ICMD_DCONST:
1434                                 case ICMD_ACONST:
1435
1436                                         /* pop 0 push 1 load */
1437
1438                                 case ICMD_ILOAD:
1439                                 case ICMD_LLOAD:
1440                                 case ICMD_FLOAD:
1441                                 case ICMD_DLOAD:
1442                                 case ICMD_ALOAD:
1443                                         NEW_TEMP_REG(iptr->dst.varindex);
1444                                         break;
1445
1446                                         /* pop 2 push 1 */
1447
1448                                 case ICMD_IALOAD:
1449                                 case ICMD_LALOAD:
1450                                 case ICMD_FALOAD:
1451                                 case ICMD_DALOAD:
1452                                 case ICMD_AALOAD:
1453
1454                                 case ICMD_BALOAD:
1455                                 case ICMD_CALOAD:
1456                                 case ICMD_SALOAD:
1457                                         FREE_TEMP_REG(iptr->sx.s23.s2.varindex);
1458                                         FREE_TEMP_REG(iptr->s1.varindex);
1459                                         NEW_TEMP_REG(iptr->dst.varindex);
1460                                         break;
1461
1462                                         /* pop 3 push 0 */
1463
1464                                 case ICMD_IASTORE:
1465                                 case ICMD_LASTORE:
1466                                 case ICMD_FASTORE:
1467                                 case ICMD_DASTORE:
1468                                 case ICMD_AASTORE:
1469
1470                                 case ICMD_BASTORE:
1471                                 case ICMD_CASTORE:
1472                                 case ICMD_SASTORE:
1473                                         FREE_TEMP_REG(iptr->sx.s23.s3.varindex);
1474                                         FREE_TEMP_REG(iptr->sx.s23.s2.varindex);
1475                                         FREE_TEMP_REG(iptr->s1.varindex);
1476                                         break;
1477
1478                                         /* pop 1 push 0 store */
1479
1480                                 case ICMD_ISTORE:
1481                                 case ICMD_LSTORE:
1482                                 case ICMD_FSTORE:
1483                                 case ICMD_DSTORE:
1484                                 case ICMD_ASTORE:
1485
1486                                         /* pop 1 push 0 */
1487
1488                                 case ICMD_POP:
1489
1490                                 case ICMD_IRETURN:
1491                                 case ICMD_LRETURN:
1492                                 case ICMD_FRETURN:
1493                                 case ICMD_DRETURN:
1494                                 case ICMD_ARETURN:
1495
1496                                 case ICMD_ATHROW:
1497
1498                                 case ICMD_PUTSTATIC:
1499                                 case ICMD_PUTFIELDCONST:
1500
1501                                         /* pop 1 push 0 branch */
1502
1503                                 case ICMD_IFNULL:
1504                                 case ICMD_IFNONNULL:
1505
1506                                 case ICMD_IFEQ:
1507                                 case ICMD_IFNE:
1508                                 case ICMD_IFLT:
1509                                 case ICMD_IFGE:
1510                                 case ICMD_IFGT:
1511                                 case ICMD_IFLE:
1512
1513                                 case ICMD_IF_LEQ:
1514                                 case ICMD_IF_LNE:
1515                                 case ICMD_IF_LLT:
1516                                 case ICMD_IF_LGE:
1517                                 case ICMD_IF_LGT:
1518                                 case ICMD_IF_LLE:
1519
1520                                         /* pop 1 push 0 table branch */
1521
1522                                 case ICMD_TABLESWITCH:
1523                                 case ICMD_LOOKUPSWITCH:
1524
1525                                 case ICMD_MONITORENTER:
1526                                 case ICMD_MONITOREXIT:
1527                                         FREE_TEMP_REG(iptr->s1.varindex);
1528                                         break;
1529
1530                                         /* pop 2 push 0 branch */
1531
1532                                 case ICMD_IF_ICMPEQ:
1533                                 case ICMD_IF_ICMPNE:
1534                                 case ICMD_IF_ICMPLT:
1535                                 case ICMD_IF_ICMPGE:
1536                                 case ICMD_IF_ICMPGT:
1537                                 case ICMD_IF_ICMPLE:
1538
1539                                 case ICMD_IF_LCMPEQ:
1540                                 case ICMD_IF_LCMPNE:
1541                                 case ICMD_IF_LCMPLT:
1542                                 case ICMD_IF_LCMPGE:
1543                                 case ICMD_IF_LCMPGT:
1544                                 case ICMD_IF_LCMPLE:
1545
1546                                 case ICMD_IF_FCMPEQ:
1547                                 case ICMD_IF_FCMPNE:
1548
1549                                 case ICMD_IF_FCMPL_LT:
1550                                 case ICMD_IF_FCMPL_GE:
1551                                 case ICMD_IF_FCMPL_GT:
1552                                 case ICMD_IF_FCMPL_LE:
1553
1554                                 case ICMD_IF_FCMPG_LT:
1555                                 case ICMD_IF_FCMPG_GE:
1556                                 case ICMD_IF_FCMPG_GT:
1557                                 case ICMD_IF_FCMPG_LE:
1558
1559                                 case ICMD_IF_DCMPEQ:
1560                                 case ICMD_IF_DCMPNE:
1561
1562                                 case ICMD_IF_DCMPL_LT:
1563                                 case ICMD_IF_DCMPL_GE:
1564                                 case ICMD_IF_DCMPL_GT:
1565                                 case ICMD_IF_DCMPL_LE:
1566
1567                                 case ICMD_IF_DCMPG_LT:
1568                                 case ICMD_IF_DCMPG_GE:
1569                                 case ICMD_IF_DCMPG_GT:
1570                                 case ICMD_IF_DCMPG_LE:
1571
1572                                 case ICMD_IF_ACMPEQ:
1573                                 case ICMD_IF_ACMPNE:
1574
1575                                         /* pop 2 push 0 */
1576
1577                                 case ICMD_POP2:
1578
1579                                 case ICMD_PUTFIELD:
1580
1581                                 case ICMD_IASTORECONST:
1582                                 case ICMD_LASTORECONST:
1583                                 case ICMD_AASTORECONST:
1584                                 case ICMD_BASTORECONST:
1585                                 case ICMD_CASTORECONST:
1586                                 case ICMD_SASTORECONST:
1587                                         FREE_TEMP_REG(iptr->sx.s23.s2.varindex);
1588                                         FREE_TEMP_REG(iptr->s1.varindex);
1589                                         break;
1590
1591                                         /* pop 0 push 1 copy */
1592
1593                                 case ICMD_COPY:
1594                                         /* src === dst->prev (identical Stackslot Element)     */
1595                                         /* src --> dst       (copied value, take same reg/mem) */
1596
1597                                         if (!simplereg_alloc_dup(jd, iptr->s1.varindex, iptr->dst.varindex)) {
1598                                                 NEW_TEMP_REG(iptr->dst.varindex);
1599                                         }
1600                                         else {
1601                                                 v = VAROP(iptr->dst);
1602
1603                                                 if (v->flags & INMEMORY) {
1604                                                         if (v->vv.regoff >= rd->memcopycountsize) {
1605                                                                 int newsize = (v->vv.regoff + 1) * 2;
1606                                                                 i = rd->memcopycountsize;
1607                                                                 rd->memcopycount = DMREALLOC(rd->memcopycount, int, i, newsize);
1608                                                                 MZERO(rd->memcopycount + i, int, newsize - i);
1609                                                                 rd->memcopycountsize = newsize;
1610                                                         }
1611                                                         rd->memcopycount[v->vv.regoff]++;
1612                                                 }
1613                                                 else {
1614                                                         /* XXX split reg/mem variables on arm may need special handling here */
1615
1616                                                         s4 regindex = REG_INDEX(v->vv.regoff, v->type);
1617
1618                                                         rd->regcopycount[regindex]++;
1619                                                 }
1620                                         }
1621                                         break;
1622
1623                                         /* pop 1 push 1 move */
1624
1625                                 case ICMD_MOVE:
1626                                         if (!simplereg_alloc_dup(jd, iptr->s1.varindex, iptr->dst.varindex)) {
1627                                                 NEW_TEMP_REG(iptr->dst.varindex);
1628                                                 FREE_TEMP_REG(iptr->s1.varindex);
1629                                         }
1630                                         break;
1631
1632                                         /* pop 2 push 1 */
1633
1634                                 case ICMD_IADD:
1635                                 case ICMD_ISUB:
1636                                 case ICMD_IMUL:
1637                                 case ICMD_IDIV:
1638                                 case ICMD_IREM:
1639
1640                                 case ICMD_ISHL:
1641                                 case ICMD_ISHR:
1642                                 case ICMD_IUSHR:
1643                                 case ICMD_IAND:
1644                                 case ICMD_IOR:
1645                                 case ICMD_IXOR:
1646
1647                                 case ICMD_LADD:
1648                                 case ICMD_LSUB:
1649                                 case ICMD_LMUL:
1650                                 case ICMD_LDIV:
1651                                 case ICMD_LREM:
1652
1653                                 case ICMD_LOR:
1654                                 case ICMD_LAND:
1655                                 case ICMD_LXOR:
1656
1657                                 case ICMD_LSHL:
1658                                 case ICMD_LSHR:
1659                                 case ICMD_LUSHR:
1660
1661                                 case ICMD_FADD:
1662                                 case ICMD_FSUB:
1663                                 case ICMD_FMUL:
1664                                 case ICMD_FDIV:
1665                                 case ICMD_FREM:
1666
1667                                 case ICMD_DADD:
1668                                 case ICMD_DSUB:
1669                                 case ICMD_DMUL:
1670                                 case ICMD_DDIV:
1671                                 case ICMD_DREM:
1672
1673                                 case ICMD_LCMP:
1674                                 case ICMD_FCMPL:
1675                                 case ICMD_FCMPG:
1676                                 case ICMD_DCMPL:
1677                                 case ICMD_DCMPG:
1678                                         FREE_TEMP_REG(iptr->sx.s23.s2.varindex);
1679                                         FREE_TEMP_REG(iptr->s1.varindex);
1680                                         NEW_TEMP_REG(iptr->dst.varindex);
1681                                         break;
1682
1683                                         /* pop 1 push 1 */
1684
1685                                 case ICMD_IADDCONST:
1686                                 case ICMD_ISUBCONST:
1687                                 case ICMD_IMULCONST:
1688                                 case ICMD_IMULPOW2:
1689                                 case ICMD_IDIVPOW2:
1690                                 case ICMD_IREMPOW2:
1691                                 case ICMD_IANDCONST:
1692                                 case ICMD_IORCONST:
1693                                 case ICMD_IXORCONST:
1694                                 case ICMD_ISHLCONST:
1695                                 case ICMD_ISHRCONST:
1696                                 case ICMD_IUSHRCONST:
1697
1698                                 case ICMD_LADDCONST:
1699                                 case ICMD_LSUBCONST:
1700                                 case ICMD_LMULCONST:
1701                                 case ICMD_LMULPOW2:
1702                                 case ICMD_LDIVPOW2:
1703                                 case ICMD_LREMPOW2:
1704                                 case ICMD_LANDCONST:
1705                                 case ICMD_LORCONST:
1706                                 case ICMD_LXORCONST:
1707                                 case ICMD_LSHLCONST:
1708                                 case ICMD_LSHRCONST:
1709                                 case ICMD_LUSHRCONST:
1710
1711                                 case ICMD_INEG:
1712                                 case ICMD_INT2BYTE:
1713                                 case ICMD_INT2CHAR:
1714                                 case ICMD_INT2SHORT:
1715                                 case ICMD_LNEG:
1716                                 case ICMD_FNEG:
1717                                 case ICMD_DNEG:
1718
1719                                 case ICMD_I2L:
1720                                 case ICMD_I2F:
1721                                 case ICMD_I2D:
1722                                 case ICMD_L2I:
1723                                 case ICMD_L2F:
1724                                 case ICMD_L2D:
1725                                 case ICMD_F2I:
1726                                 case ICMD_F2L:
1727                                 case ICMD_F2D:
1728                                 case ICMD_D2I:
1729                                 case ICMD_D2L:
1730                                 case ICMD_D2F:
1731
1732                                 case ICMD_CHECKCAST:
1733
1734                                 case ICMD_ARRAYLENGTH:
1735                                 case ICMD_INSTANCEOF:
1736
1737                                 case ICMD_NEWARRAY:
1738                                 case ICMD_ANEWARRAY:
1739
1740                                 case ICMD_GETFIELD:
1741                                         FREE_TEMP_REG(iptr->s1.varindex);
1742                                         NEW_TEMP_REG(iptr->dst.varindex);
1743                                         break;
1744
1745                                         /* pop 0 push 1 */
1746
1747                                 case ICMD_GETSTATIC:
1748
1749                                 case ICMD_NEW:
1750                                         NEW_TEMP_REG(iptr->dst.varindex);
1751                                         break;
1752
1753                                         /* pop many push any */
1754
1755                                 case ICMD_INVOKESTATIC:
1756                                 case ICMD_INVOKESPECIAL:
1757                                 case ICMD_INVOKEVIRTUAL:
1758                                 case ICMD_INVOKEINTERFACE:
1759                                         INSTRUCTION_GET_METHODDESC(iptr,md);
1760                                         i = md->paramcount;
1761                                         argp = iptr->sx.s23.s2.args;
1762                                         while (--i >= 0) {
1763                                                 FREE_TEMP_REG(*argp);
1764                                                 argp++;
1765                                         }
1766                                         if (md->returntype.type != TYPE_VOID)
1767                                                 NEW_TEMP_REG(iptr->dst.varindex);
1768                                         break;
1769
1770                                 case ICMD_BUILTIN:
1771                                         bte = iptr->sx.s23.s3.bte;
1772                                         md = bte->md;
1773                                         i = md->paramcount;
1774                                         argp = iptr->sx.s23.s2.args;
1775                                         while (--i >= 0) {
1776                                                 FREE_TEMP_REG(*argp);
1777                                                 argp++;
1778                                         }
1779                                         if (md->returntype.type != TYPE_VOID)
1780                                                 NEW_TEMP_REG(iptr->dst.varindex);
1781                                         break;
1782
1783                                 case ICMD_MULTIANEWARRAY:
1784                                         i = iptr->s1.argcount;
1785                                         argp = iptr->sx.s23.s2.args;
1786                                         while (--i >= 0) {
1787                                                 FREE_TEMP_REG(*argp);
1788                                                 argp++;
1789                                         }
1790                                         NEW_TEMP_REG(iptr->dst.varindex);
1791                                         break;
1792
1793                                 default:
1794                                         exceptions_throw_internalerror("Unknown ICMD %d during register allocation",
1795                                                                                                    iptr->opc);
1796                                         return;
1797                                 } /* switch */
1798                                 iptr++;
1799                         } /* while instructions */
1800                 } /* if */
1801                 bptr = bptr->next;
1802         } /* while blocks */
1803 }
1804
1805
1806 #if defined(ENABLE_STATISTICS)
1807 void simplereg_make_statistics(jitdata *jd)
1808 {
1809         methodinfo   *m;
1810         codegendata  *cd;
1811         registerdata *rd;
1812         int i;
1813         s4 len;
1814 #if 0
1815         stackptr    src, src_old;
1816         stackptr    dst;
1817         instruction *iptr;
1818 #endif
1819         basicblock  *bptr;
1820         int size_interface; /* == maximum size of in/out stack at basic block boundaries */
1821         bool in_register;
1822         varinfo *var;
1823
1824         /* get required compiler data */
1825
1826         m  = jd->m;
1827         cd = jd->cd;
1828         rd = jd->rd;
1829
1830         in_register = true;
1831
1832         size_interface = 0;
1833
1834                 /* count how many local variables are held in memory or register */
1835                 for(i=0; i < jd->localcount; i++) {
1836                         if (VAR(i)->flags & INMEMORY) {
1837                                 count_locals_spilled++;
1838                                 in_register=false;
1839                         }
1840                         else {
1841                                 count_locals_register++;
1842                         }
1843                 }
1844
1845                 /* count how many stack slots are held in memory or register */
1846
1847                 bptr = jd->basicblocks;
1848
1849                 while (bptr != NULL) {
1850                         if (bptr->flags >= BBREACHED) {
1851
1852 #if defined(ENABLE_LSRA) || defined(ENABLE_SSA)
1853                         if (!opt_lsra) {
1854 #endif
1855                                 /* check for memory moves from interface to BB instack */
1856                                 len = bptr->indepth;
1857
1858                                 if (len > size_interface) size_interface = len;
1859
1860                                 while (len) {
1861                                         len--;
1862                                         var = VAR(bptr->invars[len]);
1863
1864                                         /* invars statistics (currently none) */
1865                                 }
1866
1867                                 /* check for memory moves from BB outstack to interface */
1868                                 len = bptr->outdepth;
1869                                 if (len > size_interface) size_interface = len;
1870
1871                                 while (len) {
1872                                         len--;
1873                                         var = VAR(bptr->outvars[len]);
1874
1875                                         /* outvars statistics (currently none) */
1876                                 }
1877 #if defined(ENABLE_LSRA) || defined(ENABLE_SSA)
1878                         }
1879 #endif
1880
1881
1882 #if 0
1883                                 dst = bptr->instack;
1884                                 iptr = bptr->iinstr;
1885                                 len = bptr->icount;
1886                                 src_old = NULL;
1887
1888                                 while (--len >= 0)  {
1889                                         src = dst;
1890                                         dst = iptr->dst.var;
1891
1892                                         if ((src!= NULL) && (src != src_old)) { /* new stackslot */
1893                                                 switch (src->varkind) {
1894                                                 case TEMPVAR:
1895                                                 case STACKVAR:
1896                                                         if (!(src->flags & INMEMORY))
1897                                                                 count_ss_register++;
1898                                                         else {
1899                                                                 count_ss_spilled++;
1900                                                                 in_register=false;
1901                                                         }
1902                                                         break;
1903                                                         /*                                      case LOCALVAR: */
1904                                                         /*                                              if (!(rd->locals[src->varnum][src->type].flags & INMEMORY)) */
1905                                                         /*                                                      count_ss_register++; */
1906                                                         /*                                              else */
1907                                                         /*                                                      count_ss_spilled++; */
1908                                                         /*                                              break; */
1909                                                 case ARGVAR:
1910                                                         if (!(src->flags & INMEMORY))
1911                                                                 count_argument_mem_ss++;
1912                                                         else
1913                                                                 count_argument_reg_ss++;
1914                                                         break;
1915
1916
1917                                                         /*                                              if (IS_FLT_DBL_TYPE(src->type)) { */
1918                                                         /*                                                      if (src->varnum < FLT_ARG_CNT) { */
1919                                                         /*                                                              count_ss_register++; */
1920                                                         /*                                                              break; */
1921                                                         /*                                                      } */
1922                                                         /*                                              } else { */
1923                                                         /* #if defined(__POWERPC__) */
1924                                                         /*                                                      if (src->varnum < INT_ARG_CNT - (IS_2_WORD_TYPE(src->type) != 0)) { */
1925                                                         /* #else */
1926                                                         /*                                                      if (src->varnum < INT_ARG_CNT) { */
1927                                                         /* #endif */
1928                                                         /*                                                              count_ss_register++; */
1929                                                         /*                                                              break; */
1930                                                         /*                                                      } */
1931                                                         /*                                              } */
1932                                                         /*                                              count_ss_spilled++; */
1933                                                         /*                                              break; */
1934                                                 }
1935                                         }
1936                                         src_old = src;
1937
1938                                         iptr++;
1939                                 } /* while instructions */
1940 #endif
1941                         } /* if */
1942
1943                         bptr = bptr->next;
1944                 } /* while blocks */
1945
1946                 count_interface_size += size_interface; /* accummulate the size of the interface (between bb boundaries) */
1947                 if (in_register) count_method_in_register++;
1948                 if (in_register) {
1949 /*                      printf("INREGISTER: %s%s%s\n",m->class->name->text, m->name->text, m->descriptor->text); */
1950                 }
1951 }
1952 #endif /* defined(ENABLE_STATISTICS) */
1953
1954
1955 /*
1956  * These are local overrides for various environment variables in Emacs.
1957  * Please do not remove this and leave it at the end of the file, where
1958  * Emacs will automagically detect them.
1959  * ---------------------------------------------------------------------
1960  * Local variables:
1961  * mode: c
1962  * indent-tabs-mode: t
1963  * c-basic-offset: 4
1964  * tab-width: 4
1965  * End:
1966  * vim:noexpandtab:sw=4:ts=4:
1967  */