src/vm/jit/allocator/simplereg.c

   1 /* src/vm/jit/allocator/simplereg.c - register allocator
   2
   3    Copyright (C) 1996-2005 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    Contact: cacao@complang.tuwien.ac.at
  26
  27    Authors: Andreas Krall
  28
  29    Changes: Stefan Ring
  30             Christian Thalinger
  31             Christian Ullrich
  32             Michael Starzinger
  33             Edwin Steiner
  34
  35    $Id: simplereg.c 5909 2006-11-05 10:22:37Z edwin $
  36
  37 */
  38
  39
  40 #include "config.h"
  41 #include "vm/types.h"
  42
  43 #include <assert.h>
  44
  45 #include "arch.h"
  46 #include "md-abi.h"
  47
  48 #include "vm/builtin.h"
  49 #include "vm/exceptions.h"
  50 #include "mm/memory.h"
  51 #include "vm/method.h"
  52 #include "vm/options.h"
  53 #include "vm/resolve.h"
  54 #include "vm/stringlocal.h"
  55 #include "vm/jit/reg.h"
  56 #include "vm/jit/allocator/simplereg.h"
  57 #include "vm/jit/show.h"
  58
  59
  60 #if 0
  61 #    define LOG(args) printf args
  62 #else
  63 #    define LOG(args)
  64 #endif
  65
  66
  67 /* function prototypes for this file ******************************************/
  68
  69 static void simplereg_allocate_interfaces(jitdata *jd);
  70 static void simplereg_allocate_locals(jitdata *jd);
  71 static void simplereg_allocate_temporaries(jitdata *jd);
  72
  73
  74 /* total number of registers */
  75
  76 #if defined(HAS_ADDRESS_REGISTER_FILE)
  77 #define TOTAL_REG_CNT  (INT_REG_CNT + FLT_REG_CNT + ADR_REG_CNT)
  78 #else
  79 #define TOTAL_REG_CNT  (INT_REG_CNT + FLT_REG_CNT)
  80 #endif
  81
  82
  83 /* macros for handling register stacks ****************************************/
  84
  85 #define AVAIL_FRONT(cnt, limit)   ((cnt) < (limit))
  86 #define AVAIL_BACK(cnt)           ((cnt) > 0)
  87
  88 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
  89 #define AVAIL_FRONT_INT(cnt, limit)   ((cnt) < (limit) - intregsneeded)
  90 #define AVAIL_BACK_INT(cnt)           ((cnt) > intregsneeded)
  91 #else
  92 #define AVAIL_FRONT_INT(cnt, limit)   AVAIL_FRONT(cnt, limit)
  93 #define AVAIL_BACK_INT(cnt)           AVAIL_BACK(cnt)
  94 #endif
  95
  96 #define POP_FRONT(stk, cnt, reg)   do {  reg = stk[cnt++];    } while (0)
  97 #define POP_BACK(stk, cnt, reg)    do {  reg = stk[--cnt];    } while (0)
  98 #define PUSH_FRONT(stk, cnt, reg)  do {  stk[--cnt] = (reg);  } while (0)
  99 #define PUSH_BACK(stk, cnt, reg)   do {  stk[cnt++] = (reg);  } while (0)
 100
 101 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 102 #define POP_FRONT_INT(stk, cnt, reg)                                 \
 103     do {                                                             \
 104         if (intregsneeded) {                                         \
 105             reg = PACK_REGS(stk[cnt], stk[cnt+1]);                   \
 106             cnt += 2;                                                \
 107         }                                                            \
 108         else                                                         \
 109             POP_FRONT(stk, cnt, reg);                                \
 110     } while (0)
 111 #else
 112 #define POP_FRONT_INT(stk, cnt, reg)  POP_FRONT(stk, cnt, reg)
 113 #endif
 114
 115 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 116 #define POP_BACK_INT(stk, cnt, reg)                                  \
 117     do {                                                             \
 118         if (intregsneeded) {                                         \
 119             cnt -= 2;                                                \
 120             reg = PACK_REGS(stk[cnt], stk[cnt+1]);                   \
 121         }                                                            \
 122         else                                                         \
 123             POP_BACK(stk, cnt, reg);                                 \
 124     } while (0)
 125 #else
 126 #define POP_BACK_INT(stk, cnt, reg)  POP_BACK(stk, cnt, reg)
 127 #endif
 128
 129 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 130 #define PUSH_BACK_INT(stk, cnt, reg)                                 \
 131     do {                                                             \
 132         if (intregsneeded) {                                         \
 133             stk[cnt] = GET_LOW_REG(reg);                             \
 134             stk[cnt + 1] = GET_HIGH_REG(reg);                        \
 135             cnt += 2;                                                \
 136         }                                                            \
 137         else                                                         \
 138             PUSH_BACK(stk, cnt, reg);                                \
 139     } while (0)
 140 #else
 141 #define PUSH_BACK_INT(stk, cnt, reg)  PUSH_BACK(stk, cnt, reg)
 142 #endif
 143
 144 #define AVAIL_ARG_FLT  AVAIL_FRONT(rd->argfltreguse, FLT_ARG_CNT)
 145 #define AVAIL_TMP_FLT  AVAIL_BACK(rd->tmpfltreguse)
 146 #define AVAIL_SAV_FLT  AVAIL_BACK(rd->savfltreguse)
 147
 148 #define AVAIL_ARG_ADR  AVAIL_FRONT(rd->argadrreguse, ADR_ARG_CNT)
 149 #define AVAIL_TMP_ADR  AVAIL_BACK(rd->tmpadrreguse)
 150 #define AVAIL_SAV_ADR  AVAIL_BACK(rd->savadrreguse)
 151
 152 #define AVAIL_ARG_INT  AVAIL_FRONT_INT(rd->argintreguse, INT_ARG_CNT)
 153 #define AVAIL_TMP_INT  AVAIL_BACK_INT(rd->tmpintreguse)
 154 #define AVAIL_SAV_INT  AVAIL_BACK_INT(rd->savintreguse)
 155
 156 #define AVAIL_FREE_ARG_FLT  AVAIL_BACK(rd->freeargflttop)
 157 #define AVAIL_FREE_TMP_FLT  AVAIL_BACK(rd->freetmpflttop)
 158 #define AVAIL_FREE_SAV_FLT  AVAIL_BACK(rd->freesavflttop)
 159
 160 #define AVAIL_FREE_ARG_ADR  AVAIL_BACK(rd->freeargadrtop)
 161 #define AVAIL_FREE_TMP_ADR  AVAIL_BACK(rd->freetmpadrtop)
 162 #define AVAIL_FREE_SAV_ADR  AVAIL_BACK(rd->freesavadrtop)
 163
 164 #define AVAIL_FREE_ARG_INT  AVAIL_BACK_INT(rd->freearginttop)
 165 #define AVAIL_FREE_TMP_INT  AVAIL_BACK_INT(rd->freetmpinttop)
 166 #define AVAIL_FREE_SAV_INT  AVAIL_BACK_INT(rd->freesavinttop)
 167
 168 #define TAKE_ARG_FLT(r)  POP_FRONT(rd->argfltregs, rd->argfltreguse, r)
 169 #define TAKE_TMP_FLT(r)  POP_BACK(rd->tmpfltregs, rd->tmpfltreguse, r)
 170 #define TAKE_SAV_FLT(r)  POP_BACK(rd->savfltregs, rd->savfltreguse, r)
 171
 172 #define TAKE_ARG_ADR(r)  POP_FRONT(rd->argadrregs, rd->argadrreguse, r)
 173 #define TAKE_TMP_ADR(r)  POP_BACK(rd->tmpadrregs, rd->tmpadrreguse, r)
 174 #define TAKE_SAV_ADR(r)  POP_BACK(rd->savadrregs, rd->savadrreguse, r)
 175
 176 #define TAKE_ARG_INT(r)  POP_FRONT_INT(rd->argintregs, rd->argintreguse, r)
 177 #define TAKE_TMP_INT(r)  POP_BACK_INT(rd->tmpintregs, rd->tmpintreguse, r)
 178 #define TAKE_SAV_INT(r)  POP_BACK_INT(rd->savintregs, rd->savintreguse, r)
 179
 180 #define TAKE_FREE_ARG_FLT(r)  POP_BACK(rd->freeargfltregs, rd->freeargflttop, r)
 181 #define TAKE_FREE_TMP_FLT(r)  POP_BACK(rd->freetmpfltregs, rd->freetmpflttop, r)
 182 #define TAKE_FREE_SAV_FLT(r)  POP_BACK(rd->freesavfltregs, rd->freesavflttop, r)
 183
 184 #define TAKE_FREE_ARG_ADR(r)  POP_BACK(rd->freeargadrregs, rd->freeargadrtop, r)
 185 #define TAKE_FREE_TMP_ADR(r)  POP_BACK(rd->freetmpadrregs, rd->freetmpadrtop, r)
 186 #define TAKE_FREE_SAV_ADR(r)  POP_BACK(rd->freesavadrregs, rd->freesavadrtop, r)
 187
 188 #define TAKE_FREE_ARG_INT(r)  POP_BACK_INT(rd->freeargintregs, rd->freearginttop, r)
 189 #define TAKE_FREE_TMP_INT(r)  POP_BACK_INT(rd->freetmpintregs, rd->freetmpinttop, r)
 190 #define TAKE_FREE_SAV_INT(r)  POP_BACK_INT(rd->freesavintregs, rd->freesavinttop, r)
 191
 192 #define PUSH_FREE_ARG_FLT(r)  PUSH_BACK(rd->freeargfltregs, rd->freeargflttop, r)
 193 #define PUSH_FREE_TMP_FLT(r)  PUSH_BACK(rd->freetmpfltregs, rd->freetmpflttop, r)
 194 #define PUSH_FREE_SAV_FLT(r)  PUSH_BACK(rd->freesavfltregs, rd->freesavflttop, r)
 195
 196 #define PUSH_FREE_ARG_ADR(r)  PUSH_BACK(rd->freeargadrregs, rd->freeargadrtop, r)
 197 #define PUSH_FREE_TMP_ADR(r)  PUSH_BACK(rd->freetmpadrregs, rd->freetmpadrtop, r)
 198 #define PUSH_FREE_SAV_ADR(r)  PUSH_BACK(rd->freesavadrregs, rd->freesavadrtop, r)
 199
 200 #define PUSH_FREE_ARG_INT(r)  PUSH_BACK_INT(rd->freeargintregs, rd->freearginttop, r)
 201 #define PUSH_FREE_TMP_INT(r)  PUSH_BACK_INT(rd->freetmpintregs, rd->freetmpinttop, r)
 202 #define PUSH_FREE_SAV_INT(r)  PUSH_BACK_INT(rd->freesavintregs, rd->freesavinttop, r)
 203
 204
 205 /* macros for allocating memory slots ****************************************/
 206
 207 #define NEW_MEM_SLOT(r)                                              \
 208     do {                                                             \
 209         (r) = rd->memuse;                                            \
 210         rd->memuse += memneeded + 1;                                 \
 211     } while (0)
 212
 213 #define NEW_MEM_SLOT_ALIGNED(r)                                      \
 214     do {                                                             \
 215         if ( (memneeded) && (rd->memuse & 1))                        \
 216             rd->memuse++;                                            \
 217         (r) = rd->memuse;                                            \
 218         rd->memuse += memneeded + 1;                                 \
 219     } while (0)
 220
 221 #define NEW_MEM_SLOT_ALIGNED_REUSE_PADDING(r)                        \
 222     do {                                                             \
 223         if ( (memneeded) && (rd->memuse & 1)) {                      \
 224                         PUSH_BACK(rd->freemem, rd->freememtop, rd->memuse);      \
 225             rd->memuse++;                                            \
 226                 }                                                            \
 227         (r) = rd->memuse;                                            \
 228         rd->memuse += memneeded + 1;                                 \
 229     } while (0)
 230
 231 #if defined(ALIGN_LONGS_IN_MEMORY)
 232 #define NEW_MEM_SLOT_INT_LNG(r)  NEW_MEM_SLOT_ALIGNED(r)
 233 #else
 234 #define NEW_MEM_SLOT_INT_LNG(r)  NEW_MEM_SLOT(r)
 235 #endif
 236
 237 #if defined(ALIGN_DOUBLES_IN_MEMORY)
 238 #define NEW_MEM_SLOT_FLT_DBL(r)  NEW_MEM_SLOT_ALIGNED(r)
 239 #else
 240 #define NEW_MEM_SLOT_FLT_DBL(r)  NEW_MEM_SLOT(r)
 241 #endif
 242
 243 #if defined(ALIGN_LONGS_IN_MEMORY) || defined(ALIGN_DOUBLES_IN_MEMORY)
 244 #define NEW_MEM_SLOT_REUSE_PADDING(r)  NEW_MEM_SLOT_ALIGNED_REUSE_PADDING(r)
 245 #else
 246 #define NEW_MEM_SLOT_REUSE_PADDING(r)  NEW_MEM_SLOT(r)
 247 #endif
 248
 249
 250 /* macros for creating/freeing temporary variables ***************************/
 251
 252 #define NEW_TEMP_REG(index)                                          \
 253     if ( ((index) >= jd->localcount)                                 \
 254          && (!(VAR(index)->flags & (INOUT | PREALLOC))) )            \
 255         simplereg_new_temp(jd, (index))
 256
 257
 258 #define FREE_TEMP_REG(index)                                         \
 259     if (((index) > jd->localcount)                                   \
 260         && (!(VAR(index)->flags & (PREALLOC))))                      \
 261         simplereg_free_temp(jd, (index))
 262
 263
 264 /* macro for getting a unique register index *********************************/
 265
 266 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 267 #define REG_INDEX_NON_ADR(regoff, type)                              \
 268     (IS_FLT_DBL_TYPE(type) ? (INT_REG_CNT + (regoff)) : (GET_LOW_REG(regoff)))
 269 #else
 270 #define REG_INDEX_NON_ADR(regoff, type)                              \
 271     (IS_FLT_DBL_TYPE(type) ? (INT_REG_CNT + (regoff)) : (regoff))
 272 #endif
 273
 274 #if defined(HAS_ADDRESS_REGISTER_FILE)
 275 #define REG_INDEX(regoff, type)                                      \
 276     (IS_ADR_TYPE(type) ? (regoff) : (ADR_REG_CNT + REG_INDEX_NON_ADR(regoff, type)))
 277 #else
 278 #define REG_INDEX(regoff, type)  REG_INDEX_NON_ADR(regoff, type)
 279 #endif
 280
 281
 282 /* regalloc ********************************************************************
 283
 284    Does a simple register allocation.
 285
 286 *******************************************************************************/
 287
 288 bool regalloc(jitdata *jd)
 289 {
 290         /* There is a problem with the use of unused float argument
 291            registers in leafmethods for stackslots on c7 (2 * Dual Core
 292            AMD Opteron(tm) Processor 270) - runtime for the jvm98 _mtrt
 293            benchmark is heaviliy increased. This could be prevented by
 294            setting rd->argfltreguse to FLT_ARG_CNT before calling
 295            simplereg_allocate_temporaries and setting it back to the original
 296            value before calling simplereg_allocate_locals.  */
 297
 298         simplereg_allocate_interfaces(jd);
 299         simplereg_allocate_temporaries(jd);
 300         simplereg_allocate_locals(jd);
 301
 302         /* everthing's ok */
 303
 304         return true;
 305 }
 306
 307
 308 /* simplereg_allocate_interfaces ***********************************************
 309
 310    Allocates registers for all interface variables.
 311
 312 *******************************************************************************/
 313
 314 static void simplereg_allocate_interfaces(jitdata *jd)
 315 {
 316         methodinfo   *m;
 317         codegendata  *cd;
 318         registerdata *rd;
 319
 320         int     s, t, tt, saved;
 321         int     intalloc, fltalloc; /* Remember allocated Register/Memory offset */
 322                         /* in case more vars are packed into this interface slot */
 323         int             memneeded = 0;
 324         /* Allocate LNG and DBL types first to ensure 2 memory slots or          */
 325         /* registers on HAS_4BYTE_STACKSLOT architectures.                       */
 326         int     typeloop[] = { TYPE_LNG, TYPE_DBL, TYPE_INT, TYPE_FLT, TYPE_ADR };
 327         int     flags, regoff;
 328 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 329         int             intregsneeded;
 330 #endif
 331
 332         /* get required compiler data */
 333
 334         m  = jd->m;
 335         cd = jd->cd;
 336         rd = jd->rd;
 337
 338         /* rd->memuse was already set in stack.c to allocate stack space
 339            for passing arguments to called methods. */
 340
 341 #if defined(__I386__)
 342         if (checksync && (m->flags & ACC_SYNCHRONIZED)) {
 343                 /* reserve 0(%esp) for Monitorenter/exit Argument on i386 */
 344                 if (rd->memuse < 1)
 345                         rd->memuse = 1;
 346         }
 347 #endif
 348
 349         if (jd->isleafmethod) {
 350                 /* Reserve argument register, which will be used for Locals acting */
 351                 /* as Parameters */
 352                 if (rd->argintreguse < m->parseddesc->argintreguse)
 353                         rd->argintreguse = m->parseddesc->argintreguse;
 354                 if (rd->argfltreguse < m->parseddesc->argfltreguse)
 355                         rd->argfltreguse = m->parseddesc->argfltreguse;
 356 #ifdef HAS_ADDRESS_REGISTER_FILE
 357                 if (rd->argadrreguse < m->parseddesc->argadrreguse)
 358                         rd->argadrreguse = m->parseddesc->argadrreguse;
 359 #endif
 360         }
 361
 362         for (s = 0; s < jd->maxinterfaces; s++) {
 363                 intalloc = -1; fltalloc = -1;
 364
 365                 /* check if the interface at this stack depth must be a SAVEDVAR */
 366
 367                 saved = 0;
 368
 369                 for (tt = 0; tt <=4; tt++) {
 370                         if ((t = jd->interface_map[s * 5 + tt].flags) != UNUSED) {
 371                                 saved |= t & SAVEDVAR;
 372                         }
 373                 }
 374
 375                 /* allocate reg/mem for each type the interface is used as */
 376
 377                 for (tt = 0; tt <= 4; tt++) {
 378                         t = typeloop[tt];
 379                         if (jd->interface_map[s * 5 + t].flags == UNUSED)
 380                                 continue;
 381
 382                         flags = saved;
 383                         regoff = -1; /* initialize to invalid value */
 384
 385 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 386                         intregsneeded = (IS_2_WORD_TYPE(t)) ? 1 : 0;
 387 #endif
 388
 389 #if defined(HAS_4BYTE_STACKSLOT)
 390                         memneeded = (IS_2_WORD_TYPE(t)) ? 1 : 0;
 391 #endif
 392
 393                         if (!saved) {
 394 #if defined(HAS_ADDRESS_REGISTER_FILE)
 395                                 if (IS_ADR_TYPE(t)) {
 396                                         if (!jd->isleafmethod && AVAIL_ARG_ADR) {
 397                                                 flags |= ARGREG;
 398                                                 TAKE_ARG_ADR(regoff);
 399                                         }
 400                                         else if (AVAIL_TMP_ADR) {
 401                                                 TAKE_TMP_ADR(regoff);
 402                                         }
 403                                         else if (AVAIL_SAV_ADR) {
 404                                                 flags |= SAVREG;
 405                                                 TAKE_SAV_ADR(regoff);
 406                                         }
 407                                         else {
 408                                                 flags |= INMEMORY;
 409                                                 regoff = rd->memuse++;
 410                                         }
 411                                 }
 412                                 else /* !IS_ADR_TYPE */
 413 #endif /* defined(HAS_ADDRESS_REGISTER_FILE) */
 414                                 {
 415                                         if (IS_FLT_DBL_TYPE(t)) {
 416                                                 if (fltalloc >= 0) {
 417                                                         /* Reuse memory slot(s)/register(s) for shared interface slots */
 418                                                         flags |= jd->interface_map[fltalloc].flags & ~SAVEDVAR;
 419                                                         regoff = jd->interface_map[fltalloc].regoff;
 420                                                 }
 421                                                 else if (AVAIL_ARG_FLT) {
 422                                                         flags |= ARGREG;
 423                                                         TAKE_ARG_FLT(regoff);
 424                                                 }
 425                                                 else if (AVAIL_TMP_FLT) {
 426                                                         TAKE_TMP_FLT(regoff);
 427                                                 }
 428                                                 else if (AVAIL_SAV_FLT) {
 429                                                         flags |= SAVREG;
 430                                                         TAKE_SAV_FLT(regoff);
 431                                                 }
 432                                                 else {
 433                                                         flags |= INMEMORY;
 434                                                         NEW_MEM_SLOT_FLT_DBL(regoff);
 435                                                 }
 436                                                 fltalloc = s * 5 + t;
 437                                         }
 438                                         else { /* !IS_FLT_DBL_TYPE(t) */
 439 #if defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 440                                                 /*
 441                                                  * for i386 put all longs in memory
 442                                                  */
 443                                                 if (IS_2_WORD_TYPE(t)) {
 444                                                         flags |= INMEMORY;
 445                                                         NEW_MEM_SLOT_INT_LNG(regoff);
 446                                                 }
 447                                                 else
 448 #endif /* defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE...GISTERS) */
 449                                                         if (intalloc >= 0) {
 450                                                                 /* Reuse memory slot(s)/register(s) for shared interface slots */
 451                                                                 flags |= jd->interface_map[intalloc].flags & ~SAVEDVAR;
 452                                                                 regoff = jd->interface_map[intalloc].regoff;
 453 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 454                                                                 /* reuse lower half */
 455                                                                 if (!(flags & INMEMORY)
 456                                                                                 && IS_2_WORD_TYPE(intalloc % 5))
 457                                                                         regoff = GET_LOW_REG(regoff);
 458 #endif
 459                                                         }
 460                                                         else {
 461                                                                 if (AVAIL_ARG_INT) {
 462                                                                         flags |= ARGREG;
 463                                                                         TAKE_ARG_INT(regoff);
 464                                                                 }
 465                                                                 else if (AVAIL_TMP_INT) {
 466                                                                         TAKE_TMP_INT(regoff);
 467                                                                 }
 468                                                                 else if (AVAIL_SAV_INT) {
 469                                                                         flags |= SAVREG;
 470                                                                         TAKE_SAV_INT(regoff);
 471                                                                 }
 472                                                                 else {
 473                                                                         flags |= INMEMORY;
 474                                                                         NEW_MEM_SLOT_INT_LNG(regoff);
 475                                                                 }
 476                                                         }
 477
 478                                                 intalloc = s * 5 + t;
 479                                         } /* if (IS_FLT_DBL_TYPE(t)) */
 480                                 }
 481                         }
 482                         else { /* (saved) */
 483                                 /* now the same like above, but without a chance to take a temporary register */
 484 #ifdef HAS_ADDRESS_REGISTER_FILE
 485                                 if (IS_ADR_TYPE(t)) {
 486                                         if (AVAIL_SAV_ADR) {
 487                                                 TAKE_SAV_ADR(regoff);
 488                                         }
 489                                         else {
 490                                                 flags |= INMEMORY;
 491                                                 regoff = rd->memuse++;
 492                                         }
 493                                 }
 494                                 else
 495 #endif
 496                                 {
 497                                         if (IS_FLT_DBL_TYPE(t)) {
 498                                                 if (fltalloc >= 0) {
 499                                                         flags |= jd->interface_map[fltalloc].flags & ~SAVEDVAR;
 500                                                         regoff = jd->interface_map[fltalloc].regoff;
 501                                                 }
 502                                                 else {
 503                                                         if (AVAIL_SAV_FLT) {
 504                                                                 TAKE_SAV_FLT(regoff);
 505                                                         }
 506                                                         else {
 507                                                                 flags |= INMEMORY;
 508                                                                 NEW_MEM_SLOT_FLT_DBL(regoff);
 509                                                         }
 510                                                 }
 511                                                 fltalloc = s * 5 + t;
 512                                         }
 513                                         else { /* IS_INT_LNG */
 514 #if defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 515                                                 /*
 516                                                  * for i386 put all longs in memory
 517                                                  */
 518                                                 if (IS_2_WORD_TYPE(t)) {
 519                                                         flags |= INMEMORY;
 520                                                         NEW_MEM_SLOT_INT_LNG(regoff);
 521                                                 }
 522                                                 else
 523 #endif
 524                                                 {
 525                                                         if (intalloc >= 0) {
 526                                                                 flags |= jd->interface_map[intalloc].flags & ~SAVEDVAR;
 527                                                                 regoff = jd->interface_map[intalloc].regoff;
 528 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 529                                                                 /*  reuse lower half */
 530                                                                 if (!(flags & INMEMORY)
 531                                                                                 && IS_2_WORD_TYPE(intalloc % 5))
 532                                                                         regoff = GET_LOW_REG(regoff);
 533 #endif
 534                                                         }
 535                                                         else {
 536                                                                 if (AVAIL_SAV_INT) {
 537                                                                         TAKE_SAV_INT(regoff);
 538                                                                 }
 539                                                                 else {
 540                                                                         flags |= INMEMORY;
 541                                                                         NEW_MEM_SLOT_INT_LNG(regoff);
 542                                                                 }
 543                                                         }
 544                                                         intalloc = s*5 + t;
 545                                                 }
 546                                         } /* if (IS_FLT_DBL_TYPE(t) else */
 547                                 } /* if (IS_ADR_TYPE(t)) else */
 548                         } /* if (saved) else */
 549                         /* if (type >= 0) */
 550
 551                         assert(regoff >= 0);
 552                         jd->interface_map[5*s + t].flags = flags | INOUT;
 553                         jd->interface_map[5*s + t].regoff = regoff;
 554                 } /* for t */
 555         } /* for s */
 556 }
 557
 558
 559 /* simplereg_allocate_locals_leafmethod ****************************************
 560
 561    Allocates registers for all local variables of a leafmethod.
 562
 563 *******************************************************************************/
 564
 565 static void simplereg_allocate_locals_leafmethod(jitdata *jd)
 566 {
 567         methodinfo   *m;
 568         codegendata  *cd;
 569         registerdata *rd;
 570         methoddesc *md;
 571
 572         int     p, s, t, tt, lm;
 573         int     intalloc, fltalloc;
 574         varinfo *v;
 575         int     intregsneeded = 0;
 576         int     memneeded = 0;
 577         int     typeloop[] = { TYPE_LNG, TYPE_DBL, TYPE_INT, TYPE_FLT, TYPE_ADR };
 578         int     fargcnt, iargcnt;
 579 #ifdef HAS_ADDRESS_REGISTER_FILE
 580         int     aargcnt;
 581 #endif
 582
 583         /* get required compiler data */
 584
 585         m  = jd->m;
 586         cd = jd->cd;
 587         rd = jd->rd;
 588
 589         md = m->parseddesc;
 590
 591         iargcnt = rd->argintreguse;
 592         fargcnt = rd->argfltreguse;
 593 #ifdef HAS_ADDRESS_REGISTER_FILE
 594         aargcnt = rd->argadrreguse;
 595 #endif
 596         for (p = 0, s = 0; s < cd->maxlocals; s++, p++) {
 597                 intalloc = -1; fltalloc = -1;
 598                 for (tt = 0; tt <= 4; tt++) {
 599                         t = typeloop[tt];
 600                         lm = jd->local_map[s * 5 + t];
 601                         if (lm == UNUSED)
 602                                 continue;
 603
 604                         v = VAR(lm);
 605
 606 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 607                         intregsneeded = (IS_2_WORD_TYPE(t)) ? 1 : 0;
 608 #endif
 609 #if defined(HAS_4BYTE_STACKSLOT)
 610                         memneeded = (IS_2_WORD_TYPE(t)) ? 1 : 0;
 611 #endif
 612
 613                         /*
 614                          *  The order of
 615                          *
 616                          *  #ifdef HAS_ADDRESS_REGISTER_FILE
 617                          *  if (IS_ADR_TYPE) {
 618                          *  ...
 619                          *  } else
 620                          *  #endif
 621                          *  if (IS_FLT_DBL) {
 622                          *  ...
 623                          *  } else { / int & lng
 624                          *  ...
 625                          *  }
 626                          *
 627                          *  must not to be changed!
 628                          */
 629
 630 #ifdef HAS_ADDRESS_REGISTER_FILE
 631                         if (IS_ADR_TYPE(t)) {
 632                                 if ((p < md->paramcount) && !md->params[p].inmemory) {
 633                                         v->flags = 0;
 634                                         v->vv.regoff = rd->argadrregs[md->params[p].regoff];
 635                                 }
 636                                 else if (AVAIL_TMP_ADR) {
 637                                         v->flags = 0;
 638                                         TAKE_TMP_ADR(v->vv.regoff);
 639                                 }
 640                                 /* use unused argument registers as local registers */
 641                                 else if ((p >= md->paramcount) &&
 642                                                  (aargcnt < ADR_ARG_CNT))
 643                                 {
 644                                         v->flags = 0;
 645                                         POP_FRONT(rd->argadrregs, aargcnt, v->vv.regoff);
 646                                 }
 647                                 else if (AVAIL_SAV_ADR) {
 648                                         v->flags = 0;
 649                                         TAKE_SAV_ADR(v->vv.regoff);
 650                                 }
 651                                 else {
 652                                         v->flags |= INMEMORY;
 653                                         v->vv.regoff = rd->memuse++;
 654                                 }
 655                         }
 656                         else {
 657 #endif
 658                                 if (IS_FLT_DBL_TYPE(t)) {
 659                                         if (fltalloc >= 0) {
 660                                                 v->flags = VAR(fltalloc)->flags;
 661                                                 v->vv.regoff = VAR(fltalloc)->vv.regoff;
 662                                         }
 663 #if !defined(SUPPORT_PASS_FLOATARGS_IN_INTREGS)
 664                                         /* We can only use float arguments as local variables,
 665                                          * if we do not pass them in integer registers. */
 666                                         else if ((p < md->paramcount) &&
 667                                                          !md->params[p].inmemory)
 668                                         {
 669                                                 v->flags = 0;
 670                                                 v->vv.regoff = rd->argfltregs[md->params[p].regoff];
 671                                         }
 672 #endif
 673                                         else if (AVAIL_TMP_FLT) {
 674                                                 v->flags = 0;
 675                                                 TAKE_TMP_FLT(v->vv.regoff);
 676                                         }
 677                                         /* use unused argument registers as local registers */
 678                                         else if ((p >= md->paramcount) &&
 679                                                          (fargcnt < FLT_ARG_CNT))
 680                                         {
 681                                                 v->flags = 0;
 682                                                 POP_FRONT(rd->argfltregs, fargcnt, v->vv.regoff);
 683                                         }
 684                                         else if (AVAIL_SAV_FLT) {
 685                                                 v->flags = 0;
 686                                                 TAKE_SAV_FLT(v->vv.regoff);
 687                                         }
 688                                         else {
 689                                                 v->flags = INMEMORY;
 690                                                 NEW_MEM_SLOT_FLT_DBL(v->vv.regoff);
 691                                         }
 692                                         fltalloc = jd->local_map[s * 5 + t];
 693
 694                                 }
 695                                 else {
 696 #if defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 697                                         /*
 698                                          * for i386 put all longs in memory
 699                                          */
 700                                         if (IS_2_WORD_TYPE(t)) {
 701                                                 v->flags = INMEMORY;
 702                                                 NEW_MEM_SLOT_INT_LNG(v->vv.regoff);
 703                                         }
 704                                         else
 705 #endif
 706                                         {
 707                                                 if (intalloc >= 0) {
 708                                                         v->flags = VAR(intalloc)->flags;
 709 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 710                                                         if (!(v->flags & INMEMORY)
 711                                                                 && IS_2_WORD_TYPE(VAR(intalloc)->type))
 712                                                                 v->vv.regoff = GET_LOW_REG(
 713                                                                                                 VAR(intalloc)->vv.regoff);
 714                                                         else
 715 #endif
 716                                                                 v->vv.regoff = VAR(intalloc)->vv.regoff;
 717                                                 }
 718                                                 else if ((p < md->paramcount) &&
 719                                                                  !md->params[p].inmemory)
 720                                                 {
 721                                                         v->flags = 0;
 722 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 723                                                         if (IS_2_WORD_TYPE(t))
 724                                                                 v->vv.regoff = PACK_REGS(
 725                                                 rd->argintregs[GET_LOW_REG(md->params[p].regoff)],
 726                                                 rd->argintregs[GET_HIGH_REG(md->params[p].regoff)]);
 727                                                                 else
 728 #endif
 729                                                                         v->vv.regoff =
 730                                                                            rd->argintregs[md->params[p].regoff];
 731                                                 }
 732                                                 else if (AVAIL_TMP_INT) {
 733                                                         v->flags = 0;
 734                                                         TAKE_TMP_INT(v->vv.regoff);
 735                                                 }
 736                                                 /*
 737                                                  * use unused argument registers as local registers
 738                                                  */
 739                                                 else if ((p >= m->parseddesc->paramcount) &&
 740                                                                  (iargcnt + intregsneeded < INT_ARG_CNT))
 741                                                 {
 742                                                         v->flags = 0;
 743                                                         POP_FRONT_INT(rd->argintregs, iargcnt, v->vv.regoff);
 744                                                 }
 745                                                 else if (AVAIL_SAV_INT) {
 746                                                         v->flags = 0;
 747                                                         TAKE_SAV_INT(v->vv.regoff);
 748                                                 }
 749                                                 else {
 750                                                         v->flags = INMEMORY;
 751                                                         NEW_MEM_SLOT_INT_LNG(v->vv.regoff);
 752                                                 }
 753                                         }
 754                                         intalloc = jd->local_map[s * 5 + t];
 755                                 }
 756 #ifdef HAS_ADDRESS_REGISTER_FILE
 757                         }
 758 #endif
 759                 } /* for (tt=0;...) */
 760
 761                 /* If the current parameter is a 2-word type, the next local slot */
 762                 /* is skipped.                                                    */
 763
 764                 if (p < md->paramcount)
 765                         if (IS_2_WORD_TYPE(md->paramtypes[p].type))
 766                                 s++;
 767         }
 768 }
 769
 770 /* simplereg_allocate_locals ***************************************************
 771
 772    Allocates registers for all local variables.
 773
 774 *******************************************************************************/
 775
 776 static void simplereg_allocate_locals(jitdata *jd)
 777 {
 778         codegendata  *cd;
 779         registerdata *rd;
 780
 781         int     s, t, tt, lm;
 782         int     intalloc, fltalloc;
 783         varinfo *v;
 784         int     memneeded = 0;
 785         int     typeloop[] = { TYPE_LNG, TYPE_DBL, TYPE_INT, TYPE_FLT, TYPE_ADR };
 786 #ifdef SUPPORT_COMBINE_INTEGER_REGISTERS
 787         s4 intregsneeded;
 788 #endif
 789
 790         /* get required compiler data */
 791
 792         cd = jd->cd;
 793         rd = jd->rd;
 794
 795         if (jd->isleafmethod) {
 796                 simplereg_allocate_locals_leafmethod(jd);
 797                 return;
 798         }
 799
 800         for (s = 0; s < cd->maxlocals; s++) {
 801                 intalloc = -1; fltalloc = -1;
 802                 for (tt=0; tt<=4; tt++) {
 803                         t = typeloop[tt];
 804
 805                         lm = jd->local_map[s * 5 + t];
 806                         if (lm == UNUSED)
 807                                 continue;
 808
 809                         v = VAR(lm);
 810
 811 #ifdef SUPPORT_COMBINE_INTEGER_REGISTERS
 812                                 intregsneeded = (IS_2_WORD_TYPE(t)) ? 1 : 0;
 813 #endif
 814
 815 #if defined(HAS_4BYTE_STACKSLOT)
 816                                 memneeded = (IS_2_WORD_TYPE(t)) ? 1 : 0;
 817 #endif
 818
 819 #ifdef HAS_ADDRESS_REGISTER_FILE
 820                                 if (IS_ADR_TYPE(t)) {
 821                                         if (AVAIL_SAV_ADR) {
 822                                                 v->flags = 0;
 823                                                 TAKE_SAV_ADR(v->vv.regoff);
 824                                         }
 825                                         else {
 826                                                 v->flags = INMEMORY;
 827                                                 v->vv.regoff = rd->memuse++;
 828                                         }
 829                                 }
 830                                 else {
 831 #endif
 832                                 if (IS_FLT_DBL_TYPE(t)) {
 833                                         if (fltalloc >= 0) {
 834                                                 v->flags = VAR(fltalloc)->flags;
 835                                                 v->vv.regoff = VAR(fltalloc)->vv.regoff;
 836                                         }
 837                                         else if (AVAIL_SAV_FLT) {
 838                                                 v->flags = 0;
 839                                                 TAKE_SAV_FLT(v->vv.regoff);
 840                                         }
 841                                         else {
 842                                                 v->flags = INMEMORY;
 843                                                 NEW_MEM_SLOT_FLT_DBL(v->vv.regoff);
 844                                         }
 845                                         fltalloc = jd->local_map[s * 5 + t];
 846                                 }
 847                                 else {
 848 #if defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 849                                         /*
 850                                          * for i386 put all longs in memory
 851                                          */
 852                                         if (IS_2_WORD_TYPE(t)) {
 853                                                 v->flags = INMEMORY;
 854                                                 NEW_MEM_SLOT_INT_LNG(v->vv.regoff);
 855                                         }
 856                                         else {
 857 #endif
 858                                                 if (intalloc >= 0) {
 859                                                         v->flags = VAR(intalloc)->flags;
 860 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 861                                                         if (!(v->flags & INMEMORY)
 862                                                                 && IS_2_WORD_TYPE(VAR(intalloc)->type))
 863                                                                 v->vv.regoff = GET_LOW_REG(
 864                                                                                             VAR(intalloc)->vv.regoff);
 865                                                         else
 866 #endif
 867                                                                 v->vv.regoff = VAR(intalloc)->vv.regoff;
 868                                                 }
 869                                                 else if (AVAIL_SAV_INT) {
 870                                                         v->flags = 0;
 871                                                         TAKE_SAV_INT(v->vv.regoff);
 872                                                 }
 873                                                 else {
 874                                                         v->flags = INMEMORY;
 875                                                         NEW_MEM_SLOT_INT_LNG(v->vv.regoff);
 876                                                 }
 877 #if defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
 878                                         }
 879 #endif
 880                                         intalloc = jd->local_map[s * 5 + t];
 881                                 }
 882 #ifdef HAS_ADDRESS_REGISTER_FILE
 883                                 }
 884 #endif
 885                 }
 886         }
 887 }
 888
 889
 890 static void simplereg_init(jitdata *jd, registerdata *rd)
 891 {
 892         int i;
 893
 894         rd->freememtop = 0;
 895 #if defined(HAS_4BYTE_STACKSLOT)
 896         rd->freememtop_2 = 0;
 897 #endif
 898
 899         rd->freetmpinttop = 0;
 900         rd->freesavinttop = 0;
 901         rd->freetmpflttop = 0;
 902         rd->freesavflttop = 0;
 903 #ifdef HAS_ADDRESS_REGISTER_FILE
 904         rd->freetmpadrtop = 0;
 905         rd->freesavadrtop = 0;
 906 #endif
 907
 908         rd->freearginttop = 0;
 909         rd->freeargflttop = 0;
 910 #ifdef HAS_ADDRESS_REGISTER_FILE
 911         rd->freeargadrtop = 0;
 912 #endif
 913
 914         rd->regisoutvar = DMNEW(int, TOTAL_REG_CNT);
 915         rd->regcopycount = DMNEW(int, TOTAL_REG_CNT);
 916         MZERO(rd->regcopycount, int, TOTAL_REG_CNT);
 917
 918         /* memcopycount is dynamically allocated when needed */
 919
 920         rd->memcopycount = NULL;
 921         rd->memcopycountsize = 0;
 922
 923         rd->intusedinout = DMNEW(int, INT_REG_CNT);
 924         MZERO(rd->intusedinout, int, INT_REG_CNT);
 925         rd->fltusedinout = DMNEW(int, FLT_REG_CNT);
 926         MZERO(rd->fltusedinout, int, FLT_REG_CNT);
 927
 928         /* record the interface registers as used */
 929
 930         for (i=0; i<rd->argintreguse; ++i)
 931                 rd->intusedinout[rd->argintregs[i]] = 1;
 932         for (i=rd->tmpintreguse; i<INT_TMP_CNT; ++i)
 933                 rd->intusedinout[rd->tmpintregs[i]] = 1;
 934         for (i=rd->savintreguse; i<INT_SAV_CNT; ++i)
 935                 rd->intusedinout[rd->savintregs[i]] = 1;
 936
 937         for (i=0; i<rd->argfltreguse; ++i)
 938                 rd->fltusedinout[rd->argfltregs[i]] = 1;
 939         for (i=rd->tmpfltreguse; i<FLT_TMP_CNT; ++i)
 940                 rd->fltusedinout[rd->tmpfltregs[i]] = 1;
 941         for (i=rd->savfltreguse; i<FLT_SAV_CNT; ++i)
 942                 rd->fltusedinout[rd->savfltregs[i]] = 1;
 943
 944 #ifdef HAS_ADDRESS_REGISTER_FILE
 945         rd->adrusedinout = DMNEW(int, ADR_REG_CNT);
 946         MZERO(rd->adrusedinout, int, ADR_REG_CNT);
 947
 948         for (i=0; i<rd->argadrreguse; ++i)
 949                 rd->adrusedinout[rd->argadrregs[i]] = 1;
 950         for (i=rd->tmpadrreguse; i<ADR_TMP_CNT; ++i)
 951                 rd->adrusedinout[rd->tmpadrregs[i]] = 1;
 952         for (i=rd->savadrreguse; i<ADR_SAV_CNT; ++i)
 953                 rd->adrusedinout[rd->savadrregs[i]] = 1;
 954 #endif
 955 }
 956
 957
 958 static void simplereg_init_block(registerdata *rd)
 959 {
 960         int i;
 961
 962         /* remove all interface registers from the free lists */
 963
 964         for (i=0; i<rd->freearginttop; ++i)
 965                 if (rd->intusedinout[rd->freeargintregs[i]]) {
 966                         rd->freeargintregs[i--] = rd->freeargintregs[--rd->freearginttop];
 967                 }
 968         for (i=0; i<rd->freetmpinttop; ++i)
 969                 if (rd->intusedinout[rd->freetmpintregs[i]]) {
 970                         rd->freetmpintregs[i--] = rd->freetmpintregs[--rd->freetmpinttop];
 971                 }
 972         for (i=0; i<rd->freesavinttop; ++i)
 973                 if (rd->intusedinout[rd->freesavintregs[i]]) {
 974                         rd->freesavintregs[i--] = rd->freesavintregs[--rd->freesavinttop];
 975                 }
 976
 977         for (i=0; i<rd->freeargflttop; ++i)
 978                 if (rd->fltusedinout[rd->freeargfltregs[i]]) {
 979                         rd->freeargfltregs[i--] = rd->freeargfltregs[--rd->freeargflttop];
 980                 }
 981         for (i=0; i<rd->freetmpflttop; ++i)
 982                 if (rd->fltusedinout[rd->freetmpfltregs[i]]) {
 983                         rd->freetmpfltregs[i--] = rd->freetmpfltregs[--rd->freetmpflttop];
 984                 }
 985         for (i=0; i<rd->freesavflttop; ++i)
 986                 if (rd->fltusedinout[rd->freesavfltregs[i]]) {
 987                         rd->freesavfltregs[i--] = rd->freesavfltregs[--rd->freesavflttop];
 988                 }
 989
 990 #ifdef HAS_ADDRESS_REGISTER_FILE
 991         for (i=0; i<rd->freeargadrtop; ++i)
 992                 if (rd->adrusedinout[rd->freeargadrregs[i]]) {
 993                         rd->freeargadrregs[i--] = rd->freeargadrregs[--rd->freeargadrtop];
 994                 }
 995         for (i=0; i<rd->freetmpadrtop; ++i)
 996                 if (rd->adrusedinout[rd->freetmpadrregs[i]]) {
 997                         rd->freetmpadrregs[i--] = rd->freetmpadrregs[--rd->freetmpadrtop];
 998                 }
 999         for (i=0; i<rd->freesavadrtop; ++i)
1000                 if (rd->adrusedinout[rd->freesavadrregs[i]]) {
1001                         rd->freesavadrregs[i--] = rd->freesavadrregs[--rd->freesavadrtop];
1002                 }
1003 #endif
1004 }
1005
1006
1007 static void simplereg_new_temp(jitdata *jd, s4 index)
1008 {
1009 #ifdef SUPPORT_COMBINE_INTEGER_REGISTERS
1010         s4 intregsneeded;
1011 #endif
1012         s4 memneeded;
1013         s4 tryagain;
1014         registerdata *rd;
1015         varinfo      *v;
1016
1017         rd = jd->rd;
1018         v = VAR(index);
1019
1020         /* Try to allocate a saved register if there is no temporary one          */
1021         /* available. This is what happens during the second run.                 */
1022         tryagain = (v->flags & SAVEDVAR) ? 1 : 2;
1023
1024 #ifdef SUPPORT_COMBINE_INTEGER_REGISTERS
1025         intregsneeded = (IS_2_WORD_TYPE(v->type)) ? 1 : 0;
1026 #endif
1027
1028 #if defined(HAS_4BYTE_STACKSLOT)
1029         memneeded = (IS_2_WORD_TYPE(v->type)) ? 1 : 0;
1030 #else
1031         memneeded = 0;
1032 #endif
1033
1034         for(; tryagain; --tryagain) {
1035                 if (tryagain == 1) {
1036                         if (!(v->flags & SAVEDVAR))
1037                                 v->flags |= SAVREG;
1038 #ifdef HAS_ADDRESS_REGISTER_FILE
1039                         if (IS_ADR_TYPE(v->type)) {
1040                                 if (AVAIL_FREE_SAV_ADR) {
1041                                         TAKE_FREE_SAV_ADR(v->vv.regoff);
1042                                         return;
1043                                 }
1044                                 else if (AVAIL_SAV_ADR) {
1045                                         TAKE_SAV_ADR(v->vv.regoff);
1046                                         return;
1047                                 }
1048                         }
1049                         else
1050 #endif
1051                         {
1052                                 if (IS_FLT_DBL_TYPE(v->type)) {
1053                                         if (AVAIL_FREE_SAV_FLT) {
1054                                                 TAKE_FREE_SAV_FLT(v->vv.regoff);
1055                                                 return;
1056                                         }
1057                                         else if (AVAIL_SAV_FLT) {
1058                                                 TAKE_SAV_FLT(v->vv.regoff);
1059                                                 return;
1060                                         }
1061                                 }
1062                                 else {
1063 #if defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
1064                                         /*
1065                                          * for i386 put all longs in memory
1066                                          */
1067                                         if (!IS_2_WORD_TYPE(v->type))
1068 #endif
1069                                         {
1070                                                 if (AVAIL_FREE_SAV_INT) {
1071                                                         TAKE_FREE_SAV_INT(v->vv.regoff);
1072                                                         return;
1073                                                 }
1074                                                 else if (AVAIL_SAV_INT) {
1075                                                         TAKE_SAV_INT(v->vv.regoff);
1076                                                         return;
1077                                                 }
1078                                         }
1079                                 }
1080                         }
1081                 }
1082                 else { /* tryagain == 2 */
1083 #ifdef HAS_ADDRESS_REGISTER_FILE
1084                         if (IS_ADR_TYPE(v->type)) {
1085                                 if (AVAIL_FREE_TMP_ADR) {
1086                                         TAKE_FREE_TMP_ADR(v->vv.regoff);
1087                                         return;
1088                                 }
1089                                 else if (AVAIL_TMP_ADR) {
1090                                         TAKE_TMP_ADR(v->vv.regoff);
1091                                         return;
1092                                 }
1093                         }
1094                         else
1095 #endif
1096                         {
1097                                 if (IS_FLT_DBL_TYPE(v->type)) {
1098                                         if (AVAIL_FREE_ARG_FLT) {
1099                                                 v->flags |= ARGREG;
1100                                                 TAKE_FREE_ARG_FLT(v->vv.regoff);
1101                                                 return;
1102                                         }
1103                                         else if (AVAIL_ARG_FLT) {
1104                                                 v->flags |= ARGREG;
1105                                                 TAKE_ARG_FLT(v->vv.regoff);
1106                                                 return;
1107                                         }
1108                                         else if (AVAIL_FREE_TMP_FLT) {
1109                                                 TAKE_FREE_TMP_FLT(v->vv.regoff);
1110                                                 return;
1111                                         }
1112                                         else if (AVAIL_TMP_FLT) {
1113                                                 TAKE_TMP_FLT(v->vv.regoff);
1114                                                 return;
1115                                         }
1116
1117                                 }
1118                                 else {
1119 #if defined(HAS_4BYTE_STACKSLOT) && !defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
1120                                         /*
1121                                          * for i386 put all longs in memory
1122                                          */
1123                                         if (!IS_2_WORD_TYPE(v->type))
1124 #endif
1125                                         {
1126                                                 if (AVAIL_FREE_ARG_INT) {
1127                                                         v->flags |= ARGREG;
1128                                                         TAKE_FREE_ARG_INT(v->vv.regoff);
1129                                                         return;
1130                                                 }
1131                                                 else if (AVAIL_ARG_INT) {
1132                                                         v->flags |= ARGREG;
1133                                                         TAKE_ARG_INT(v->vv.regoff);
1134                                                         return;
1135                                                 }
1136                                                 else if (AVAIL_FREE_TMP_INT) {
1137                                                         TAKE_FREE_TMP_INT(v->vv.regoff);
1138                                                         return;
1139                                                 }
1140                                                 else if (AVAIL_TMP_INT) {
1141                                                         TAKE_TMP_INT(v->vv.regoff);
1142                                                         return;
1143                                                 }
1144                                         } /* if (!IS_2_WORD_TYPE(s->type)) */
1145                                 } /* if (IS_FLT_DBL_TYPE(s->type)) */
1146                         } /* if (IS_ADR_TYPE(s->type)) */
1147                 } /* if (tryagain == 1) else */
1148         } /* for(; tryagain; --tryagain) */
1149
1150         /* spill to memory */
1151
1152         v->flags |= INMEMORY;
1153
1154 #if defined(HAS_4BYTE_STACKSLOT)
1155         if ((memneeded == 1) && (rd->freememtop_2 > 0))
1156                 POP_BACK(rd->freemem_2, rd->freememtop_2, v->vv.regoff);
1157         else
1158 #endif /*defined(HAS_4BYTE_STACKSLOT) */
1159                 if ((memneeded == 0) && (rd->freememtop > 0))
1160                         POP_BACK(rd->freemem, rd->freememtop, v->vv.regoff);
1161                 else
1162                         NEW_MEM_SLOT_REUSE_PADDING(v->vv.regoff);
1163 }
1164
1165
1166 static void simplereg_free(registerdata *rd, s4 flags, s4 regoff, s4 type)
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
1354                                 v->vv.regoff = jd->interface_map[5*i + v->type].regoff;
1355                                 v->flags  = jd->interface_map[5*i + v->type].flags;
1356
1357                                 if (!(v->flags & INMEMORY))
1358                                         rd->regcopycount[REG_INDEX(v->vv.regoff, v->type)] = 1;
1359                         }
1360
1361                         /* set allocation of outvars */
1362
1363                         for (i=0; i<bptr->outdepth; ++i)
1364                         {
1365                                 v = VAR(bptr->outvars[i]);
1366
1367                                 v->vv.regoff = jd->interface_map[5*i + v->type].regoff;
1368                                 v->flags  = jd->interface_map[5*i + v->type].flags;
1369
1370                                 if (!(v->flags & INMEMORY)) {
1371                                         regindex = REG_INDEX(v->vv.regoff, v->type);
1372                                         rd->regcopycount[regindex] = 1;
1373                                         rd->regisoutvar[regindex] = 1;
1374                                 }
1375                         }
1376
1377                         /* free interface registers not used in this block */
1378
1379                         for (i=0; i < 5 * jd->maxinterfaces; ++i) {
1380                                 type = i%5;
1381                                 regoff = jd->interface_map[i].regoff;
1382                                 flags = jd->interface_map[i].flags;
1383
1384                                 if (!(flags & INMEMORY)) {
1385                                         if (!rd->regcopycount[REG_INDEX(regoff, type)]) {
1386                                                 LOG(("MAY REUSE interface register f=%02x r=%d t=%d\n",
1387                                                                         flags, regoff, type));
1388                                                 simplereg_free(rd, flags, regoff, type);
1389
1390                                                 /* mark it, so it is not freed again */
1391                                                 rd->regcopycount[REG_INDEX(regoff, type)] = -1;
1392                                         }
1393                                 }
1394                         }
1395
1396                         /* reset copy counts */
1397
1398                         MZERO(rd->regcopycount, int, TOTAL_REG_CNT);
1399
1400                         /* iterate over ICMDS to allocate temporary variables */
1401
1402                         iptr = bptr->iinstr;
1403                         len = bptr->icount;
1404
1405                         while (--len >= 0)  {
1406
1407                                 switch (iptr->opc) {
1408
1409                                         /* pop 0 push 0 */
1410
1411                                 case ICMD_JSR:
1412 #if !defined(NDEBUG)
1413                                         /* avoid problems with show_allocation */
1414                                         VAROP(iptr->dst)->vv.regoff = 0;
1415 #endif
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_GOTO:
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                                         *exceptionptr =
1795                                                 new_internalerror("Unknown ICMD %d during register allocation",
1796                                                                                   iptr->opc);
1797                                         return;
1798                                 } /* switch */
1799                                 iptr++;
1800                         } /* while instructions */
1801                 } /* if */
1802                 bptr = bptr->next;
1803         } /* while blocks */
1804 }
1805
1806
1807 #if defined(ENABLE_STATISTICS)
1808 void simplereg_make_statistics(jitdata *jd)
1809 {
1810         methodinfo   *m;
1811         codegendata  *cd;
1812         registerdata *rd;
1813         int i,type;
1814         s4 len;
1815         stackptr    src, src_old;
1816         stackptr    dst;
1817         instruction *iptr;
1818         basicblock  *bptr;
1819         int size_interface; /* == maximum size of in/out stack at basic block boundaries */
1820         bool in_register;
1821         varinfo *var;
1822
1823         /* get required compiler data */
1824
1825         m  = jd->m;
1826         cd = jd->cd;
1827         rd = jd->rd;
1828
1829         in_register = true;
1830
1831         size_interface = 0;
1832
1833                 /* count how many local variables are held in memory or register */
1834                 for(i=0; i < jd->localcount; i++) {
1835                         if (VAR(i)->flags & INMEMORY) {
1836                                 count_locals_spilled++;
1837                                 in_register=false;
1838                         }
1839                         else {
1840                                 count_locals_register++;
1841                         }
1842                 }
1843
1844                 /* count how many stack slots are held in memory or register */
1845
1846                 bptr = jd->basicblocks;
1847
1848                 while (bptr != NULL) {
1849                         if (bptr->flags >= BBREACHED) {
1850
1851 #if defined(ENABLE_LSRA) || defined(ENABLE_SSA)
1852                         if (!opt_lsra) {
1853 #endif
1854                                 /* check for memory moves from interface to BB instack */
1855                                 len = bptr->indepth;
1856
1857                                 if (len > size_interface) size_interface = len;
1858
1859                                 while (len) {
1860                                         len--;
1861                                         var = VAR(bptr->invars[len]);
1862
1863                                         /* invars statistics (currently none) */
1864                                 }
1865
1866                                 /* check for memory moves from BB outstack to interface */
1867                                 len = bptr->outdepth;
1868                                 if (len > size_interface) size_interface = len;
1869
1870                                 while (len) {
1871                                         len--;
1872                                         var = VAR(bptr->outvars[len]);
1873
1874                                         /* outvars statistics (currently none) */
1875                                 }
1876 #if defined(ENABLE_LSRA) || defined(ENABLE_SSA)
1877                         }
1878 #endif
1879
1880
1881 #if 0
1882                                 dst = bptr->instack;
1883                                 iptr = bptr->iinstr;
1884                                 len = bptr->icount;
1885                                 src_old = NULL;
1886
1887                                 while (--len >= 0)  {
1888                                         src = dst;
1889                                         dst = iptr->dst.var;
1890
1891                                         if ((src!= NULL) && (src != src_old)) { /* new stackslot */
1892                                                 switch (src->varkind) {
1893                                                 case TEMPVAR:
1894                                                 case STACKVAR:
1895                                                         if (!(src->flags & INMEMORY))
1896                                                                 count_ss_register++;
1897                                                         else {
1898                                                                 count_ss_spilled++;
1899                                                                 in_register=false;
1900                                                         }
1901                                                         break;
1902                                                         /*                                      case LOCALVAR: */
1903                                                         /*                                              if (!(rd->locals[src->varnum][src->type].flags & INMEMORY)) */
1904                                                         /*                                                      count_ss_register++; */
1905                                                         /*                                              else */
1906                                                         /*                                                      count_ss_spilled++; */
1907                                                         /*                                              break; */
1908                                                 case ARGVAR:
1909                                                         if (!(src->flags & INMEMORY))
1910                                                                 count_argument_mem_ss++;
1911                                                         else
1912                                                                 count_argument_reg_ss++;
1913                                                         break;
1914
1915
1916                                                         /*                                              if (IS_FLT_DBL_TYPE(src->type)) { */
1917                                                         /*                                                      if (src->varnum < FLT_ARG_CNT) { */
1918                                                         /*                                                              count_ss_register++; */
1919                                                         /*                                                              break; */
1920                                                         /*                                                      } */
1921                                                         /*                                              } else { */
1922                                                         /* #if defined(__POWERPC__) */
1923                                                         /*                                                      if (src->varnum < INT_ARG_CNT - (IS_2_WORD_TYPE(src->type) != 0)) { */
1924                                                         /* #else */
1925                                                         /*                                                      if (src->varnum < INT_ARG_CNT) { */
1926                                                         /* #endif */
1927                                                         /*                                                              count_ss_register++; */
1928                                                         /*                                                              break; */
1929                                                         /*                                                      } */
1930                                                         /*                                              } */
1931                                                         /*                                              count_ss_spilled++; */
1932                                                         /*                                              break; */
1933                                                 }
1934                                         }
1935                                         src_old = src;
1936
1937                                         iptr++;
1938                                 } /* while instructions */
1939 #endif
1940                         } /* if */
1941
1942                         bptr = bptr->next;
1943                 } /* while blocks */
1944
1945                 count_interface_size += size_interface; /* accummulate the size of the interface (between bb boundaries) */
1946                 if (in_register) count_method_in_register++;
1947                 if (in_register) {
1948 /*                      printf("INREGISTER: %s%s%s\n",m->class->name->text, m->name->text, m->descriptor->text); */
1949                 }
1950 }
1951 #endif /* defined(ENABLE_STATISTICS) */
1952
1953
1954 /*
1955  * These are local overrides for various environment variables in Emacs.
1956  * Please do not remove this and leave it at the end of the file, where
1957  * Emacs will automagically detect them.
1958  * ---------------------------------------------------------------------
1959  * Local variables:
1960  * mode: c
1961  * indent-tabs-mode: t
1962  * c-basic-offset: 4
1963  * tab-width: 4
1964  * End:
1965  * vim:noexpandtab:sw=4:ts=4:
1966  */