jit/reg.inc

   1 /* jit/reg.inc - register allocator
   2
   3    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
   4    Institut f. Computersprachen, TU Wien
   5    R. Grafl, A. Krall, C. Kruegel, C. Oates, R. Obermaisser, M. Probst,
   6    S. Ring, E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich,
   7    J. Wenninger
   8
   9    This file is part of CACAO.
  10
  11    This program is free software; you can redistribute it and/or
  12    modify it under the terms of the GNU General Public License as
  13    published by the Free Software Foundation; either version 2, or (at
  14    your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful, but
  17    WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19    General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program; if not, write to the Free Software
  23    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  24    02111-1307, USA.
  25
  26    Contact: cacao@complang.tuwien.ac.at
  27
  28    Authors: Andreas Krall
  29
  30    Changes: Stefan Ring
  31             Christian Thalinger
  32
  33    $Id: reg.inc 1098 2004-05-27 16:01:29Z twisti $
  34
  35 */
  36
  37
  38 #include "reg.h"
  39 #include "toolbox/memory.h"
  40
  41
  42 varinfo5 *locals;
  43 varinfo5 *interfaces;
  44
  45 static int intregsnum;              /* absolute number of integer registers   */
  46 static int floatregsnum;            /* absolute number of float registers     */
  47
  48 static int intreg_ret;              /* register to return integer values      */
  49 int intreg_argnum;                  /* number of integer argument registers   */
  50
  51 static int floatreg_ret;            /* register for return float values       */
  52 int fltreg_argnum;                  /* number of float argument registers     */
  53
  54
  55 static int *argintregs;             /* scratch integer registers              */
  56 static int *tmpintregs;             /* scratch integer registers              */
  57 static int *savintregs;             /* saved integer registers                */
  58 static int *argfltregs;             /* scratch float registers                */
  59 static int *tmpfltregs;             /* scratch float registers                */
  60 static int *savfltregs;             /* saved float registers                  */
  61 static int *freeargintregs;         /* free argument integer registers        */
  62 static int *freetmpintregs;         /* free scratch integer registers         */
  63 static int *freesavintregs;         /* free saved integer registers           */
  64 static int *freeargfltregs;         /* free argument float registers          */
  65 static int *freetmpfltregs;         /* free scratch float registers           */
  66 static int *freesavfltregs;         /* free saved float registers             */
  67
  68 #ifdef USETWOREGS
  69 static int *secondregs;             /* used for longs in 2 32 bit registers   */
  70 #endif
  71
  72 static int *freemem;                /* free scratch memory                    */
  73 static int memuse;                  /* used memory count                      */
  74 static int ifmemuse;                /* interface used memory count            */
  75 static int maxmemuse;               /* maximal used memory count (spills)     */
  76 static int freememtop;              /* free memory count                      */
  77
  78 static int tmpintregcnt;            /* scratch integer register count         */
  79 static int savintregcnt;            /* saved integer register count           */
  80 static int tmpfltregcnt;            /* scratch float register count           */
  81 static int savfltregcnt;            /* saved float register count             */
  82
  83 static int iftmpintregcnt;          /* iface scratch integer register count   */
  84 static int ifsavintregcnt;          /* iface saved integer register count     */
  85 static int iftmpfltregcnt;          /* iface scratch float register count     */
  86 static int ifsavfltregcnt;          /* iface saved float register count       */
  87
  88 static int argintreguse;            /* used argument integer register count   */
  89 static int tmpintreguse;            /* used scratch integer register count    */
  90 static int savintreguse;            /* used saved integer register count      */
  91 static int argfltreguse;            /* used argument float register count     */
  92 static int tmpfltreguse;            /* used scratch float register count      */
  93 static int savfltreguse;            /* used saved float register count        */
  94
  95 static int maxargintreguse;         /* max used argument int register count   */
  96 static int maxtmpintreguse;         /* max used scratch int register count    */
  97 static int maxsavintreguse;         /* max used saved int register count      */
  98 static int maxargfltreguse;         /* max used argument float register count */
  99 static int maxtmpfltreguse;         /* max used scratch float register count  */
 100 static int maxsavfltreguse;         /* max used saved float register count    */
 101
 102 static int freearginttop;           /* free argument integer register count   */
 103 static int freetmpinttop;           /* free scratch integer register count    */
 104 static int freesavinttop;           /* free saved integer register count      */
 105 static int freeargflttop;           /* free argument float register count     */
 106 static int freetmpflttop;           /* free scratch float register count      */
 107 static int freesavflttop;           /* free saved float register count        */
 108
 109 static int savedregs_num;       /* total number of registers to be saved      */
 110 int arguments_num;              /* size of parameter field in the stackframe  */
 111
 112
 113
 114 /* function reg_init ***********************************************************
 115
 116         initialises the register-allocator
 117
 118 *******************************************************************************/
 119
 120 void reg_init()
 121 {
 122         int n;
 123
 124         if (TYPE_INT != 0 || TYPE_ADR != 4)
 125                 panic("JAVA-Basictypes have been changed");
 126
 127         /* setup the integer register table */
 128         intreg_argnum = 0;
 129         tmpintregcnt = 0;
 130         savintregcnt = 0;
 131
 132         for (intregsnum = 0; nregdescint[intregsnum] != REG_END; intregsnum++) {
 133                 switch (nregdescint[intregsnum]) {
 134                 case REG_SAV: savintregcnt++;
 135                         break;
 136                 case REG_TMP: tmpintregcnt++;
 137                         break;
 138                 case REG_ARG: intreg_argnum++;
 139                 }
 140         }
 141
 142         argintregs = MNEW(int, intreg_argnum);
 143         tmpintregs = MNEW(int, tmpintregcnt);
 144         savintregs = MNEW(int, savintregcnt);
 145         freeargintregs = MNEW(int, intreg_argnum);
 146         freetmpintregs = MNEW(int, tmpintregcnt);
 147         freesavintregs = MNEW(int, savintregcnt);
 148 #ifdef USETWOREGS
 149         secondregs = MNEW(int, intregsnum);
 150 #endif
 151
 152         intreg_argnum = 0;
 153         argintreguse = 0;
 154         tmpintreguse = 0;
 155         savintreguse = 0;
 156
 157         for (n = 0; n < intregsnum; n++) {
 158                 switch (nregdescint[n]) {
 159                 case REG_RET: intreg_ret = n;
 160                         break;
 161                 case REG_SAV: savintregs[savintreguse++] = n;
 162                         break;
 163                 case REG_TMP: tmpintregs[tmpintreguse++] = n;
 164                         break;
 165                 case REG_ARG: argintregs[intreg_argnum++] = n;
 166                         argintreguse++;
 167                         break;
 168                 }
 169         }
 170
 171 #if defined(__I386__)
 172         /*
 173            this assumes that we have 3 tmp regs (%ecx, %edx, %ebx)
 174            sort to [ %ebx, %edx, %ecx ]
 175          */
 176         n = tmpintregs[0];
 177         tmpintregs[0] = tmpintregs[2];
 178         tmpintregs[2] = n;
 179 #endif
 180
 181 #if defined(__X86_64__)
 182         /*
 183          * on x86_64 the argument registers are not in ascending order
 184          * a00 (%rdi) <-> a03 (%rcx) and a01 (%rsi) <-> a02 (%rdx)
 185          */
 186         n = argintregs[3];
 187         argintregs[3] = argintregs[0];
 188         argintregs[0] = n;
 189
 190         n = argintregs[2];
 191         argintregs[2] = argintregs[1];
 192         argintregs[1] = n;
 193 #endif
 194
 195 #ifdef USETWOREGS
 196         for (n = 1; n < intreg_argnum; n++)
 197                 secondregs[argintregs[n - 1]] = argintregs[n];
 198         for (n = 1; n < tmpintregcnt; n++)
 199                 secondregs[tmpintregs[n - 1]] = tmpintregs[n];
 200         for (n = 1; n < savintregcnt; n++)
 201                 secondregs[savintregs[n - 1]] = savintregs[n];
 202
 203         secondregs[REG_ITMP1] = REG_ITMP2;
 204         secondregs[REG_ITMP3] = REG_ITMP2;
 205         secondregs[REG_RESULT] = REG_RESULT + 1;
 206         secondregs[argintregs[intreg_argnum - 1]] = REG_ITMP3;
 207 #endif
 208
 209         /* setup the float register table */
 210         fltreg_argnum = 0;
 211         tmpfltregcnt = 0;
 212         savfltregcnt = 0;
 213
 214         for (floatregsnum = 0; nregdescfloat[floatregsnum] != REG_END; floatregsnum++) {
 215                 switch (nregdescfloat[floatregsnum]) {
 216                 case REG_SAV: savfltregcnt++;
 217                         break;
 218                 case REG_TMP: tmpfltregcnt++;
 219                         break;
 220                 case REG_ARG: fltreg_argnum++;
 221                         break;
 222                 }
 223         }
 224
 225         argfltregs = MNEW(int, fltreg_argnum);
 226         tmpfltregs = MNEW(int, tmpfltregcnt);
 227         savfltregs = MNEW(int, savfltregcnt);
 228         freeargfltregs = MNEW(int, fltreg_argnum);
 229         freetmpfltregs = MNEW(int, tmpfltregcnt);
 230         freesavfltregs = MNEW(int, savfltregcnt);
 231
 232         fltreg_argnum = 0;
 233         argfltreguse = 0;
 234         tmpfltreguse = 0;
 235         savfltreguse = 0;
 236
 237         for (n = 0; n < floatregsnum; n++) {
 238                 switch (nregdescfloat[n]) {
 239                 case REG_RET:
 240                         floatreg_ret = n;
 241                         break;
 242                 case REG_SAV: savfltregs[savfltreguse++] = n;
 243                         break;
 244                 case REG_TMP: tmpfltregs[tmpfltreguse++] = n;
 245                         break;
 246                 case REG_ARG: argfltregs[fltreg_argnum++] = n;
 247                         argfltreguse++;
 248                         break;
 249                 }
 250         }
 251 }
 252
 253
 254 void reg_setup()
 255 {
 256         int i;
 257         varinfo5 *v;
 258
 259         freemem    = DMNEW(int, maxstack);
 260         locals     = DMNEW(varinfo5, maxlocals);
 261         interfaces = DMNEW(varinfo5, maxstack);
 262
 263         for (v = locals, i = maxlocals; i > 0; v++, i--) {
 264                 v[0][TYPE_INT].type = -1;
 265                 v[0][TYPE_LNG].type = -1;
 266                 v[0][TYPE_FLT].type = -1;
 267                 v[0][TYPE_DBL].type = -1;
 268                 v[0][TYPE_ADR].type = -1;
 269         }
 270
 271         for (v = interfaces, i = maxstack; i > 0; v++, i--) {
 272                 v[0][TYPE_INT].type = -1;
 273                 v[0][TYPE_INT].flags = 0;
 274                 v[0][TYPE_LNG].type = -1;
 275                 v[0][TYPE_LNG].flags = 0;
 276                 v[0][TYPE_FLT].type = -1;
 277                 v[0][TYPE_FLT].flags = 0;
 278                 v[0][TYPE_DBL].type = -1;
 279                 v[0][TYPE_DBL].flags = 0;
 280                 v[0][TYPE_ADR].type = -1;
 281                 v[0][TYPE_ADR].flags = 0;
 282         }
 283 }
 284
 285
 286
 287 /* function reg_close **********************************************************
 288
 289         releases all allocated space for registers
 290
 291 *******************************************************************************/
 292
 293 void reg_close()
 294 {
 295         if (argintregs) MFREE(argintregs, int, intreg_argnum);
 296         if (argfltregs) MFREE(argfltregs, int, fltreg_argnum);
 297         if (tmpintregs) MFREE(tmpintregs, int, tmpintregcnt);
 298         if (savintregs) MFREE(savintregs, int, savintregcnt);
 299         if (tmpfltregs) MFREE(tmpfltregs, int, tmpfltregcnt);
 300         if (savfltregs) MFREE(savfltregs, int, savfltregcnt);
 301
 302         if (freeargintregs) MFREE(freeargintregs, int, intreg_argnum);
 303         if (freeargfltregs) MFREE(freeargfltregs, int, fltreg_argnum);
 304         if (freetmpintregs) MFREE(freetmpintregs, int, tmpintregcnt);
 305         if (freesavintregs) MFREE(freesavintregs, int, savintregcnt);
 306         if (freetmpfltregs) MFREE(freetmpfltregs, int, tmpfltregcnt);
 307         if (freesavfltregs) MFREE(freesavfltregs, int, savfltregcnt);
 308
 309 #ifdef USETWOREGS
 310         if (secondregs) MFREE(secondregs, int, intregsnum);
 311 #endif
 312 }
 313
 314
 315 /* function interface_regalloc *************************************************
 316
 317         allocates registers for all interface variables
 318
 319 *******************************************************************************/
 320
 321 void regalloc()
 322 {
 323 #if defined(__I386__)
 324         /* remove %ecx and/or %edx from tmpintregs */
 325         int origtmpintregcnt = tmpintregcnt;
 326         if (method_uses_ecx) tmpintregcnt--;
 327         if (method_uses_edx) tmpintregcnt--;
 328 #endif
 329
 330         interface_regalloc();
 331         allocate_scratch_registers();
 332         local_regalloc();
 333
 334 #if defined(__I386__)
 335         tmpintregcnt = origtmpintregcnt;
 336 #endif
 337 }
 338
 339
 340 /* function interface_regalloc *************************************************
 341
 342         allocates registers for all interface variables
 343
 344 *******************************************************************************/
 345
 346 static void interface_regalloc()
 347 {
 348         int     s, t, saved;
 349         int     intalloc, fltalloc;
 350         varinfo *v;
 351         int             regsneeded = 0;
 352
 353         /* allocate stack space for passing arguments to called methods */
 354
 355 #ifndef SPECIALMEMUSE
 356 #if defined(__X86_64__)
 357         /*
 358          * XXX: we have a problem here, but allocating a little more stack space
 359          *      is better than having a bug
 360          */
 361         /*      if (arguments_num > (intreg_argnum + fltreg_argnum)) */
 362         /*              ifmemuse = arguments_num - (intreg_argnum + fltreg_argnum); */
 363         if (arguments_num > fltreg_argnum)
 364                 ifmemuse = arguments_num - fltreg_argnum;
 365 #else
 366         if (arguments_num > intreg_argnum)
 367                 ifmemuse = arguments_num - intreg_argnum;
 368 #endif
 369         else
 370                 ifmemuse = 0;
 371 #endif
 372
 373         iftmpintregcnt = tmpintregcnt;
 374         ifsavintregcnt = savintregcnt;
 375         iftmpfltregcnt = tmpfltregcnt;
 376         ifsavfltregcnt = savfltregcnt;
 377
 378         for (s = 0; s < maxstack; s++) {
 379                 intalloc = -1; fltalloc = -1;
 380                 saved = (interfaces[s][TYPE_INT].flags | interfaces[s][TYPE_LNG].flags |
 381                          interfaces[s][TYPE_FLT].flags | interfaces[s][TYPE_DBL].flags |
 382                          interfaces[s][TYPE_ADR].flags) & SAVEDVAR;
 383
 384                 for (t = TYPE_INT; t <= TYPE_ADR; t++) {
 385                         v = &interfaces[s][t];
 386                         if (v->type >= 0) {
 387 #ifdef USETWOREGS
 388                                 regsneeded = (IS_2_WORD_TYPE(t)) ? 1 : 0;
 389 #endif
 390                                 if (!saved) {
 391                                         if (IS_FLT_DBL_TYPE(t)) {
 392                                                 if (fltalloc >= 0) {
 393                                                         v->flags |= interfaces[s][fltalloc].flags & INMEMORY;
 394                                                         v->regoff = interfaces[s][fltalloc].regoff;
 395                                                 }
 396                                                 else if (iftmpfltregcnt > 0) {
 397                                                         iftmpfltregcnt--;
 398                                                         v->regoff = tmpfltregs[iftmpfltregcnt];
 399                                                 }
 400                                                 else if (ifsavfltregcnt > 0) {
 401                                                         ifsavfltregcnt--;
 402                                                         v->regoff = savfltregs[ifsavfltregcnt];
 403                                                 }
 404                                                 else {
 405                                                         v->flags |= INMEMORY;
 406                                                         v->regoff = ifmemuse;
 407                                                         ifmemuse += regsneeded + 1;
 408                                                 }
 409                                                 fltalloc = t;
 410                                         }
 411                                         else {
 412 #if defined(__I386__)
 413                                                 /*
 414                                                  * for i386 put all longs in memory
 415                                                  */
 416                                                 if (IS_2_WORD_TYPE(t)) {
 417                                                         v->flags |= INMEMORY;
 418                                                         v->regoff = ifmemuse++;
 419                                                 } else {
 420 #endif
 421                                                         if (intalloc >= 0) {
 422                                                                 v->flags |= interfaces[s][intalloc].flags & INMEMORY;
 423                                                                 v->regoff = interfaces[s][intalloc].regoff;
 424                                                         }
 425                                                         else if (iftmpintregcnt > regsneeded) {
 426                                                                 iftmpintregcnt -= regsneeded + 1;
 427                                                                 v->regoff = tmpintregs[iftmpintregcnt];
 428                                                         }
 429                                                         else if (ifsavintregcnt > regsneeded) {
 430                                                                 ifsavintregcnt -= regsneeded + 1;
 431                                                                 v->regoff = savintregs[ifsavintregcnt];
 432                                                         }
 433                                                         else {
 434                                                                 v->flags |= INMEMORY;
 435                                                                 v->regoff = ifmemuse;
 436                                                                 ifmemuse += regsneeded + 1;
 437                                                         }
 438 #if defined(__I386__)
 439                                                 }
 440 #endif
 441                                                 intalloc = t;
 442                                         }
 443                                 }
 444                                 else {
 445                                         if (IS_FLT_DBL_TYPE(t)) {
 446                                                 if (fltalloc >= 0) {
 447                                                         v->flags |= interfaces[s][fltalloc].flags & INMEMORY;
 448                                                         v->regoff = interfaces[s][fltalloc].regoff;
 449                                                 }
 450                                                 else if (ifsavfltregcnt > 0) {
 451                                                         ifsavfltregcnt--;
 452                                                         v->regoff = savfltregs[ifsavfltregcnt];
 453                                                 }
 454                                                 else {
 455                                                         v->flags |= INMEMORY;
 456                                                         v->regoff = ifmemuse;
 457                                                         ifmemuse += regsneeded + 1;
 458                                                 }
 459                                                 fltalloc = t;
 460                                         }
 461                                         else {
 462 #if defined(__I386__)
 463                                                 /*
 464                                                  * for i386 put all longs in memory
 465                                                  */
 466                                                 if (IS_2_WORD_TYPE(t)) {
 467                                                         v->flags |= INMEMORY;
 468                                                         v->regoff = ifmemuse++;
 469                                                 } else {
 470 #endif
 471                                                         if (intalloc >= 0) {
 472                                                                 v->flags |= interfaces[s][intalloc].flags & INMEMORY;
 473                                                                 v->regoff = interfaces[s][intalloc].regoff;
 474                                                         }
 475                                                         else if (ifsavintregcnt > regsneeded) {
 476                                                                 ifsavintregcnt -= regsneeded + 1;
 477                                                                 v->regoff = savintregs[ifsavintregcnt];
 478                                                         }
 479                                                         else {
 480                                                                 v->flags |= INMEMORY;
 481                                                                 v->regoff = ifmemuse;
 482                                                                 ifmemuse += regsneeded + 1;
 483                                                         }
 484 #if defined(__I386__)
 485                                                 }
 486 #endif
 487                                                 intalloc = t;
 488                                         }
 489                                 }
 490                         } /* if (type >= 0) */
 491                 } /* for t */
 492         } /* for s */
 493
 494         maxmemuse = ifmemuse;
 495         maxargintreguse = -1;
 496         maxtmpintreguse = iftmpintregcnt;
 497         maxsavintreguse = ifsavintregcnt;
 498         maxargfltreguse = -1;
 499         maxtmpfltreguse = iftmpfltregcnt;
 500         maxsavfltreguse = ifsavfltregcnt;
 501 }
 502
 503
 504
 505 /* function local_regalloc *****************************************************
 506
 507         allocates registers for all local variables
 508
 509 *******************************************************************************/
 510
 511 static void local_regalloc()
 512 {
 513         int      s, t, tt;
 514         int      intalloc, fltalloc;
 515         varinfo *v;
 516         int      regsneeded = 0;
 517         int typeloop[] = { TYPE_LNG, TYPE_DBL, TYPE_INT, TYPE_FLT, TYPE_ADR };
 518
 519         if (isleafmethod) {
 520                 int arg, doublewordarg, iargcnt, fargcnt;
 521
 522                 arg = 0, iargcnt = 0, fargcnt = 0;
 523                 doublewordarg = 0;
 524                 for (s = 0; s < maxlocals; s++) {
 525                         intalloc = -1; fltalloc = -1;
 526                         for (tt = 0; tt <= 4; tt++) {
 527                                 t = typeloop[tt];
 528                                 v = &locals[s][t];
 529
 530                                 if (v->type >= 0) {
 531 #ifdef USETWOREGS
 532                                         regsneeded = (IS_2_WORD_TYPE(t)) ? 1 : 0;
 533 #endif
 534                                         if (IS_FLT_DBL_TYPE(t)) {
 535 #if !defined(CONSECUTIVE_FLOATARGS)
 536                                                 fargcnt = arg;
 537 #endif
 538                                                 if (fltalloc >= 0) {
 539                                                         v->flags = locals[s][fltalloc].flags;
 540                                                         v->regoff = locals[s][fltalloc].regoff;
 541                                                 }
 542                                                 else if (!doublewordarg && (arg < mparamcount)
 543                                                                  && (fargcnt < fltreg_argnum)) {
 544                                                         v->flags = 0;
 545                                                         v->regoff = argfltregs[fargcnt];
 546                                                 }
 547                                                 else if (maxtmpfltreguse > 0) {
 548                                                         maxtmpfltreguse--;
 549                                                         v->flags = 0;
 550                                                         v->regoff = tmpfltregs[maxtmpfltreguse];
 551                                                 }
 552                                                 else if (maxsavfltreguse > 0) {
 553                                                         maxsavfltreguse--;
 554                                                         v->flags = 0;
 555                                                         v->regoff = savfltregs[maxsavfltreguse];
 556                                                 }
 557                                                 else {
 558                                                         v->flags = INMEMORY;
 559                                                         v->regoff = maxmemuse;
 560                                                         maxmemuse += regsneeded + 1;
 561                                                 }
 562                                                 fltalloc = t;
 563
 564                                         } else {
 565                                                 int regtouse;
 566 #if defined(__I386__)
 567                                                 /*
 568                                                  * for i386 put all longs in memory
 569                                                  */
 570                                                 if (IS_2_WORD_TYPE(t)) {
 571                                                         v->flags = INMEMORY;
 572                                                         v->regoff = maxmemuse++;
 573                                                 } else {
 574 #endif
 575 #if !defined(CONSECUTIVE_INTARGS)
 576                                                         iargcnt = arg;
 577 #endif
 578                                                         if (intalloc >= 0) {
 579                                                                 v->flags = locals[s][intalloc].flags;
 580                                                                 v->regoff = locals[s][intalloc].regoff;
 581                                                         }
 582                                                         else if (!doublewordarg && (arg < mparamcount)
 583 #ifndef USETWOREGS
 584                                                                          && ((regtouse = iargcnt) < intreg_argnum)
 585 #else
 586                                                                          && ((regtouse = s) < intreg_argnum - regsneeded)
 587 #endif
 588                                                                          ) {
 589                                                                 v->flags = 0;
 590                                                                 v->regoff = argintregs[regtouse];
 591                                                         }
 592                                                         else if (maxtmpintreguse > regsneeded) {
 593                                                                 maxtmpintreguse -= regsneeded + 1;
 594                                                                 v->flags = 0;
 595                                                                 v->regoff = tmpintregs[maxtmpintreguse];
 596                                                         }
 597                                                         else if (maxsavintreguse > regsneeded) {
 598                                                                 maxsavintreguse -= regsneeded + 1;
 599                                                                 v->flags = 0;
 600                                                                 v->regoff = savintregs[maxsavintreguse];
 601                                                         }
 602                                                         /*
 603                                                          * use unused argument registers as local registers
 604                                                          */
 605                                                         else if (!doublewordarg && (arg >= mparamcount)
 606                                                                          && (iargcnt < intreg_argnum)) {
 607                                                                 v->flags = 0;
 608                                                                 v->regoff = argintregs[iargcnt];
 609                                                                 iargcnt++;
 610                                                                 arg++;
 611                                                         }
 612                                                         else {
 613                                                                 v->flags = INMEMORY;
 614                                                                 v->regoff = maxmemuse;
 615                                                                 maxmemuse += regsneeded + 1;
 616                                                         }
 617 #if defined(__I386__)
 618                                                 }
 619 #endif
 620                                                 intalloc = t;
 621                                         }
 622                                 }
 623                         }
 624                         if (arg < mparamcount) {
 625                                 if (doublewordarg) {
 626                                         doublewordarg = 0;
 627                                         /* what type was the double arg? */
 628                                         if (IS_FLT_DBL_TYPE(mparamtypes[arg])) {
 629                                                 fargcnt++;
 630
 631                                         } else {
 632                                                 iargcnt++;
 633                                         }
 634                                         arg++;
 635
 636                                 } else if (IS_2_WORD_TYPE(mparamtypes[arg])) {
 637                                         doublewordarg = 1;
 638
 639                                 } else {
 640                                         if (IS_FLT_DBL_TYPE(mparamtypes[arg])) {
 641                                                 fargcnt++;
 642
 643                                         } else {
 644                                                 iargcnt++;
 645                                         }
 646                                         arg++;
 647                                 }
 648                         }
 649                 }
 650                 return;
 651         }
 652
 653         for (s = 0; s < maxlocals; s++) {
 654                 intalloc = -1; fltalloc = -1;
 655                 for (tt=0; tt<=4; tt++) {
 656                         t = typeloop[tt];
 657                         v = &locals[s][t];
 658                         if (v->type >= 0) {
 659 #ifdef USETWOREGS
 660                                 regsneeded = (IS_2_WORD_TYPE(t)) ? 1 : 0;
 661 #endif
 662                                 if (IS_FLT_DBL_TYPE(t)) {
 663                                         if (fltalloc >= 0) {
 664                                                 v->flags = locals[s][fltalloc].flags;
 665                                                 v->regoff = locals[s][fltalloc].regoff;
 666                                         }
 667                                         else if (maxsavfltreguse > 0) {
 668                                                 maxsavfltreguse--;
 669                                                 v->flags = 0;
 670                                                 v->regoff = savfltregs[maxsavfltreguse];
 671                                         }
 672                                         else {
 673                                                 v->flags = INMEMORY;
 674                                                 v->regoff = maxmemuse;
 675                                                 maxmemuse += regsneeded + 1;
 676                                         }
 677                                         fltalloc = t;
 678                                 }
 679                                 else {
 680 #if defined(__I386__)
 681                                         /*
 682                                          * for i386 put all longs in memory
 683                                          */
 684                                         if (IS_2_WORD_TYPE(t)) {
 685                                                 v->flags = INMEMORY;
 686                                                 v->regoff = maxmemuse++;
 687                                         } else {
 688 #endif
 689                                                 if (intalloc >= 0) {
 690                                                         v->flags = locals[s][intalloc].flags;
 691                                                         v->regoff = locals[s][intalloc].regoff;
 692                                                 }
 693                                                 else if (maxsavintreguse > regsneeded) {
 694                                                         maxsavintreguse -= regsneeded+1;
 695                                                         v->flags = 0;
 696                                                         v->regoff = savintregs[maxsavintreguse];
 697                                                 }
 698                                                 else {
 699                                                         v->flags = INMEMORY;
 700                                                         v->regoff = maxmemuse;
 701                                                         maxmemuse += regsneeded + 1;
 702                                                 }
 703 #if defined(__I386__)
 704                                         }
 705 #endif
 706                                         intalloc = t;
 707                                 }
 708                         }
 709                 }
 710         }
 711 }
 712
 713
 714
 715 static void reg_init_temp()
 716 {
 717         freememtop = 0;
 718         memuse = ifmemuse;
 719
 720         freearginttop = 0;
 721         freetmpinttop = 0;
 722         freesavinttop = 0;
 723         freeargflttop = 0;
 724         freetmpflttop = 0;
 725         freesavflttop = 0;
 726
 727         tmpintreguse = iftmpintregcnt;
 728         savintreguse = ifsavintregcnt;
 729         tmpfltreguse = iftmpfltregcnt;
 730         savfltreguse = ifsavfltregcnt;
 731
 732         /* all argument registers are available */
 733         argintreguse = intreg_argnum;
 734         argfltreguse = fltreg_argnum;
 735 }
 736
 737
 738
 739 #define reg_new_temp(s) if (s->varkind == TEMPVAR) reg_new_temp_func(s)
 740
 741 static void reg_new_temp_func(stackptr s)
 742 {
 743         int regsneeded = 0;
 744
 745         /* Try to allocate a saved register if there is no temporary one          */
 746     /* available. This is what happens during the second run.                 */
 747         int tryagain = (s->flags & SAVEDVAR) ? 1 : 2;
 748
 749 #ifdef USETWOREGS
 750         regsneeded = (IS_2_WORD_TYPE(s->type)) ? 1 : 0;
 751 #endif
 752
 753         for(; tryagain; --tryagain) {
 754                 if (tryagain == 1) {
 755                         if (!(s->flags & SAVEDVAR))
 756                                 s->flags |= SAVEDTMP;
 757                         if (IS_FLT_DBL_TYPE(s->type)) {
 758                                 if (freesavflttop > 0) {
 759                                         freesavflttop--;
 760                                         s->regoff = freesavfltregs[freesavflttop];
 761                                         return;
 762                                 }
 763                                 else if (savfltreguse > 0) {
 764                                         savfltreguse--;
 765                                         if (savfltreguse < maxsavfltreguse)
 766                                                 maxsavfltreguse = savfltreguse;
 767                                         s->regoff = savfltregs[savfltreguse];
 768                                         return;
 769                                 }
 770                         }
 771                         else {
 772 #if defined(__I386__)
 773                                 /*
 774                                  * for i386 put all longs in memory
 775                                  */
 776                                 if (!IS_2_WORD_TYPE(s->type)) {
 777 #endif
 778                                         if (freesavinttop > regsneeded) {
 779                                                 freesavinttop -= regsneeded + 1;
 780                                                 s->regoff = freesavintregs[freesavinttop];
 781                                                 return;
 782                                         }
 783                                         else if (savintreguse > regsneeded) {
 784                                                 savintreguse -= regsneeded + 1;
 785                                                 if (savintreguse < maxsavintreguse)
 786                                                         maxsavintreguse = savintreguse;
 787                                                 s->regoff = savintregs[savintreguse];
 788                                                 return;
 789                                         }
 790 #if defined(__I386__)
 791                                 }
 792 #endif
 793                         }
 794                 }
 795                 else {
 796                         if (IS_FLT_DBL_TYPE(s->type)) {
 797                                 if (freetmpflttop > 0) {
 798                                         freetmpflttop--;
 799                                         s->regoff = freetmpfltregs[freetmpflttop];
 800                                         return;
 801                                 }
 802                                 else if (tmpfltreguse > 0) {
 803                                         tmpfltreguse--;
 804                                         if (tmpfltreguse < maxtmpfltreguse)
 805                                                 maxtmpfltreguse = tmpfltreguse;
 806                                         s->regoff = tmpfltregs[tmpfltreguse];
 807                                         return;
 808                                 }
 809                         }
 810                         else {
 811 #if defined(__I386__)
 812                                 /*
 813                                  * for i386 put all longs in memory
 814                                  */
 815                                 if (!IS_2_WORD_TYPE(s->type)) {
 816 #endif
 817                                         if (freetmpinttop > regsneeded) {
 818                                                 freetmpinttop -= regsneeded + 1;
 819                                                 s->regoff = freetmpintregs[freetmpinttop];
 820                                                 return;
 821                                         }
 822                                         else if (tmpintreguse > regsneeded) {
 823                                                 tmpintreguse -= regsneeded + 1;
 824                                                 if (tmpintreguse < maxtmpintreguse)
 825                                                         maxtmpintreguse = tmpintreguse;
 826                                                 s->regoff = tmpintregs[tmpintreguse];
 827                                                 return;
 828                                         }
 829 #if defined(__I386__)
 830                                 }
 831 #endif
 832                         }
 833                 }
 834         }
 835
 836         if (freememtop > regsneeded) {
 837                 freememtop -= regsneeded + 1;
 838                 s->regoff = freemem[freememtop];
 839         }
 840         else {
 841                 s->regoff = memuse;
 842                 memuse += regsneeded + 1;
 843                 if (memuse > maxmemuse)
 844                         maxmemuse = memuse;
 845         }
 846         s->flags |= INMEMORY;
 847 }
 848
 849
 850
 851 #define reg_free_temp(s) if (s->varkind == TEMPVAR) reg_free_temp_func(s)
 852
 853 static void reg_free_temp_func(stackptr s)
 854 {
 855         int regsneeded = 0;
 856
 857 #ifdef USETWOREGS
 858         regsneeded = (IS_2_WORD_TYPE(s->type)) ? 1 : 0;
 859 #endif
 860
 861         if (s->flags & INMEMORY) {
 862                 freemem[freememtop] = s->regoff;
 863                 if (regsneeded)
 864                         freemem[freememtop + 1] = s->regoff + 1;
 865                 freememtop += regsneeded + 1;
 866         }
 867         else if (IS_FLT_DBL_TYPE(s->type)) {
 868                 if (s->flags & (SAVEDVAR | SAVEDTMP)) {
 869                         s->flags &= ~SAVEDTMP;
 870                         freesavfltregs[freesavflttop++] = s->regoff;
 871                 } else
 872                         freetmpfltregs[freetmpflttop++] = s->regoff;
 873         }
 874         else {
 875                 if (s->flags & (SAVEDVAR | SAVEDTMP)) {
 876                         s->flags &= ~SAVEDTMP;
 877                         freesavintregs[freesavinttop] = s->regoff;
 878 #ifdef USETWOREGS
 879                         if (regsneeded)
 880                                 freesavintregs[freesavinttop + 1] = secondregs[s->regoff];
 881 #endif
 882                         freesavinttop += regsneeded + 1;
 883                 } else {
 884                         freetmpintregs[freetmpinttop] = s->regoff;
 885 #ifdef USETWOREGS
 886                         if (regsneeded)
 887                                 freetmpintregs[freetmpinttop + 1] = secondregs[s->regoff];
 888 #endif
 889                         freetmpinttop += regsneeded + 1;
 890                 }
 891         }
 892 }
 893
 894
 895
 896 static void allocate_scratch_registers()
 897 {
 898         int opcode;
 899         int i;
 900         int len;
 901         stackptr    src;
 902         stackptr    dst;
 903         instruction *iptr;
 904         basicblock  *bptr;
 905
 906         /* b_count = block_count; */
 907
 908         bptr = block;
 909         while (bptr != NULL) {
 910
 911                 if (bptr->flags >= BBREACHED) {
 912                         dst = bptr->instack;
 913                         reg_init_temp();
 914                         iptr = bptr->iinstr;
 915                         len = bptr->icount;
 916
 917                         while (--len >= 0)  {
 918                                 src = dst;
 919                                 dst = iptr->dst;
 920                                 opcode = iptr->opc;
 921
 922                                 switch (opcode) {
 923
 924                                         /* pop 0 push 0 */
 925
 926                                 case ICMD_NOP:
 927                                 case ICMD_ELSE_ICONST:
 928                                 case ICMD_CHECKASIZE:
 929                                 case ICMD_CHECKEXCEPTION:
 930                                 case ICMD_IINC:
 931                                 case ICMD_JSR:
 932                                 case ICMD_RET:
 933                                 case ICMD_RETURN:
 934                                 case ICMD_GOTO:
 935                                         break;
 936
 937                                         /* pop 0 push 1 const */
 938
 939                                 case ICMD_ICONST:
 940                                 case ICMD_LCONST:
 941                                 case ICMD_FCONST:
 942                                 case ICMD_DCONST:
 943                                 case ICMD_ACONST:
 944
 945                                         /* pop 0 push 1 load */
 946
 947                                 case ICMD_ILOAD:
 948                                 case ICMD_LLOAD:
 949                                 case ICMD_FLOAD:
 950                                 case ICMD_DLOAD:
 951                                 case ICMD_ALOAD:
 952                                         reg_new_temp(dst);
 953                                         break;
 954
 955                                         /* pop 2 push 1 */
 956
 957                                 case ICMD_IALOAD:
 958                                 case ICMD_LALOAD:
 959                                 case ICMD_FALOAD:
 960                                 case ICMD_DALOAD:
 961                                 case ICMD_AALOAD:
 962
 963                                 case ICMD_BALOAD:
 964                                 case ICMD_CALOAD:
 965                                 case ICMD_SALOAD:
 966
 967                                         reg_free_temp(src);
 968                                         reg_free_temp(src->prev);
 969                                         reg_new_temp(dst);
 970                                         break;
 971
 972                                         /* pop 3 push 0 */
 973
 974                                 case ICMD_IASTORE:
 975                                 case ICMD_LASTORE:
 976                                 case ICMD_FASTORE:
 977                                 case ICMD_DASTORE:
 978                                 case ICMD_AASTORE:
 979
 980                                 case ICMD_BASTORE:
 981                                 case ICMD_CASTORE:
 982                                 case ICMD_SASTORE:
 983
 984                                         reg_free_temp(src);
 985                                         reg_free_temp(src->prev);
 986                                         reg_free_temp(src->prev->prev);
 987                                         break;
 988
 989                                         /* pop 1 push 0 store */
 990
 991                                 case ICMD_ISTORE:
 992                                 case ICMD_LSTORE:
 993                                 case ICMD_FSTORE:
 994                                 case ICMD_DSTORE:
 995                                 case ICMD_ASTORE:
 996
 997                                         /* pop 1 push 0 */
 998
 999                                 case ICMD_POP:
1000
1001                                 case ICMD_IRETURN:
1002                                 case ICMD_LRETURN:
1003                                 case ICMD_FRETURN:
1004                                 case ICMD_DRETURN:
1005                                 case ICMD_ARETURN:
1006
1007                                 case ICMD_ATHROW:
1008
1009                                 case ICMD_PUTSTATIC:
1010
1011                                         /* pop 1 push 0 branch */
1012
1013                                 case ICMD_IFNULL:
1014                                 case ICMD_IFNONNULL:
1015
1016                                 case ICMD_IFEQ:
1017                                 case ICMD_IFNE:
1018                                 case ICMD_IFLT:
1019                                 case ICMD_IFGE:
1020                                 case ICMD_IFGT:
1021                                 case ICMD_IFLE:
1022
1023                                 case ICMD_IF_LEQ:
1024                                 case ICMD_IF_LNE:
1025                                 case ICMD_IF_LLT:
1026                                 case ICMD_IF_LGE:
1027                                 case ICMD_IF_LGT:
1028                                 case ICMD_IF_LLE:
1029
1030                                         /* pop 1 push 0 table branch */
1031
1032                                 case ICMD_TABLESWITCH:
1033                                 case ICMD_LOOKUPSWITCH:
1034
1035                                 case ICMD_NULLCHECKPOP:
1036                                 case ICMD_MONITORENTER:
1037                                 case ICMD_MONITOREXIT:
1038                                         reg_free_temp(src);
1039                                         break;
1040
1041                                         /* pop 2 push 0 branch */
1042
1043                                 case ICMD_IF_ICMPEQ:
1044                                 case ICMD_IF_ICMPNE:
1045                                 case ICMD_IF_ICMPLT:
1046                                 case ICMD_IF_ICMPGE:
1047                                 case ICMD_IF_ICMPGT:
1048                                 case ICMD_IF_ICMPLE:
1049
1050                                 case ICMD_IF_LCMPEQ:
1051                                 case ICMD_IF_LCMPNE:
1052                                 case ICMD_IF_LCMPLT:
1053                                 case ICMD_IF_LCMPGE:
1054                                 case ICMD_IF_LCMPGT:
1055                                 case ICMD_IF_LCMPLE:
1056
1057                                 case ICMD_IF_ACMPEQ:
1058                                 case ICMD_IF_ACMPNE:
1059
1060                                         /* pop 2 push 0 */
1061
1062                                 case ICMD_POP2:
1063
1064                                 case ICMD_PUTFIELD:
1065                                         reg_free_temp(src);
1066                                         reg_free_temp(src->prev);
1067                                         break;
1068
1069                                         /* pop 0 push 1 dup */
1070
1071                                 case ICMD_DUP:
1072                                         reg_new_temp(dst);
1073                                         break;
1074
1075                                         /* pop 0 push 2 dup */
1076
1077                                 case ICMD_DUP2:
1078                                         reg_new_temp(dst->prev);
1079                                         reg_new_temp(dst);
1080                                         break;
1081
1082                                         /* pop 2 push 3 dup */
1083
1084                                 case ICMD_DUP_X1:
1085                                         reg_new_temp(dst->prev->prev);
1086                                         reg_new_temp(dst->prev);
1087                                         reg_new_temp(dst);
1088                                         reg_free_temp(src);
1089                                         reg_free_temp(src->prev);
1090                                         break;
1091
1092                                         /* pop 3 push 4 dup */
1093
1094                                 case ICMD_DUP_X2:
1095                                         reg_new_temp(dst->prev->prev->prev);
1096                                         reg_new_temp(dst->prev->prev);
1097                                         reg_new_temp(dst->prev);
1098                                         reg_new_temp(dst);
1099                                         reg_free_temp(src);
1100                                         reg_free_temp(src->prev);
1101                                         reg_free_temp(src->prev->prev);
1102                                         break;
1103
1104                                         /* pop 3 push 5 dup */
1105
1106                                 case ICMD_DUP2_X1:
1107                                         reg_new_temp(dst->prev->prev->prev->prev);
1108                                         reg_new_temp(dst->prev->prev->prev);
1109                                         reg_new_temp(dst->prev->prev);
1110                                         reg_new_temp(dst->prev);
1111                                         reg_new_temp(dst);
1112                                         reg_free_temp(src);
1113                                         reg_free_temp(src->prev);
1114                                         reg_free_temp(src->prev->prev);
1115                                         break;
1116
1117                                         /* pop 4 push 6 dup */
1118
1119                                 case ICMD_DUP2_X2:
1120                                         reg_new_temp(dst->prev->prev->prev->prev->prev);
1121                                         reg_new_temp(dst->prev->prev->prev->prev);
1122                                         reg_new_temp(dst->prev->prev->prev);
1123                                         reg_new_temp(dst->prev->prev);
1124                                         reg_new_temp(dst->prev);
1125                                         reg_new_temp(dst);
1126                                         reg_free_temp(src);
1127                                         reg_free_temp(src->prev);
1128                                         reg_free_temp(src->prev->prev);
1129                                         reg_free_temp(src->prev->prev->prev);
1130                                         break;
1131
1132                                         /* pop 2 push 2 swap */
1133
1134                                 case ICMD_SWAP:
1135                                         reg_new_temp(dst->prev);
1136                                         reg_new_temp(dst);
1137                                         reg_free_temp(src);
1138                                         reg_free_temp(src->prev);
1139                                         break;
1140
1141                                         /* pop 2 push 1 */
1142
1143                                 case ICMD_IADD:
1144                                 case ICMD_ISUB:
1145                                 case ICMD_IMUL:
1146                                 case ICMD_IDIV:
1147                                 case ICMD_IREM:
1148
1149                                 case ICMD_ISHL:
1150                                 case ICMD_ISHR:
1151                                 case ICMD_IUSHR:
1152                                 case ICMD_IAND:
1153                                 case ICMD_IOR:
1154                                 case ICMD_IXOR:
1155
1156                                 case ICMD_LADD:
1157                                 case ICMD_LSUB:
1158                                 case ICMD_LMUL:
1159                                 case ICMD_LDIV:
1160                                 case ICMD_LREM:
1161
1162                                 case ICMD_LOR:
1163                                 case ICMD_LAND:
1164                                 case ICMD_LXOR:
1165
1166                                 case ICMD_LSHL:
1167                                 case ICMD_LSHR:
1168                                 case ICMD_LUSHR:
1169
1170                                 case ICMD_FADD:
1171                                 case ICMD_FSUB:
1172                                 case ICMD_FMUL:
1173                                 case ICMD_FDIV:
1174                                 case ICMD_FREM:
1175
1176                                 case ICMD_DADD:
1177                                 case ICMD_DSUB:
1178                                 case ICMD_DMUL:
1179                                 case ICMD_DDIV:
1180                                 case ICMD_DREM:
1181
1182                                 case ICMD_LCMP:
1183                                 case ICMD_FCMPL:
1184                                 case ICMD_FCMPG:
1185                                 case ICMD_DCMPL:
1186                                 case ICMD_DCMPG:
1187                                         reg_free_temp(src);
1188                                         reg_free_temp(src->prev);
1189                                         reg_new_temp(dst);
1190                                         break;
1191
1192                                         /* pop 1 push 1 */
1193
1194                                 case ICMD_IADDCONST:
1195                                 case ICMD_ISUBCONST:
1196                                 case ICMD_IMULCONST:
1197                                 case ICMD_IDIVPOW2:
1198                                 case ICMD_IREMPOW2:
1199                                 case ICMD_IREM0X10001:
1200                                 case ICMD_IANDCONST:
1201                                 case ICMD_IORCONST:
1202                                 case ICMD_IXORCONST:
1203                                 case ICMD_ISHLCONST:
1204                                 case ICMD_ISHRCONST:
1205                                 case ICMD_IUSHRCONST:
1206
1207                                 case ICMD_LADDCONST:
1208                                 case ICMD_LSUBCONST:
1209                                 case ICMD_LMULCONST:
1210                                 case ICMD_LDIVPOW2:
1211                                 case ICMD_LREMPOW2:
1212                                 case ICMD_LREM0X10001:
1213                                 case ICMD_LANDCONST:
1214                                 case ICMD_LORCONST:
1215                                 case ICMD_LXORCONST:
1216                                 case ICMD_LSHLCONST:
1217                                 case ICMD_LSHRCONST:
1218                                 case ICMD_LUSHRCONST:
1219
1220                                 case ICMD_IFEQ_ICONST:
1221                                 case ICMD_IFNE_ICONST:
1222                                 case ICMD_IFLT_ICONST:
1223                                 case ICMD_IFGE_ICONST:
1224                                 case ICMD_IFGT_ICONST:
1225                                 case ICMD_IFLE_ICONST:
1226
1227                                 case ICMD_INEG:
1228                                 case ICMD_INT2BYTE:
1229                                 case ICMD_INT2CHAR:
1230                                 case ICMD_INT2SHORT:
1231                                 case ICMD_LNEG:
1232                                 case ICMD_FNEG:
1233                                 case ICMD_DNEG:
1234
1235                                 case ICMD_I2L:
1236                                 case ICMD_I2F:
1237                                 case ICMD_I2D:
1238                                 case ICMD_L2I:
1239                                 case ICMD_L2F:
1240                                 case ICMD_L2D:
1241                                 case ICMD_F2I:
1242                                 case ICMD_F2L:
1243                                 case ICMD_F2D:
1244                                 case ICMD_D2I:
1245                                 case ICMD_D2L:
1246                                 case ICMD_D2F:
1247
1248                                 case ICMD_CHECKCAST:
1249
1250                                 case ICMD_ARRAYLENGTH:
1251                                 case ICMD_INSTANCEOF:
1252
1253                                 case ICMD_NEWARRAY:
1254                                 case ICMD_ANEWARRAY:
1255
1256                                 case ICMD_GETFIELD:
1257                                         reg_free_temp(src);
1258                                         reg_new_temp(dst);
1259                                         break;
1260
1261                                         /* pop 0 push 1 */
1262
1263                                 case ICMD_GETSTATIC:
1264
1265                                 case ICMD_NEW:
1266
1267                                         reg_new_temp(dst);
1268                                         break;
1269
1270                                         /* pop many push any */
1271
1272                                 case ICMD_INVOKEVIRTUAL:
1273                                 case ICMD_INVOKESPECIAL:
1274                                 case ICMD_INVOKESTATIC:
1275                                 case ICMD_INVOKEINTERFACE:
1276                                         {
1277                                                 i = iptr->op1;
1278                                                 while (--i >= 0) {
1279                                                         reg_free_temp(src);
1280                                                         src = src->prev;
1281                                                 }
1282                                                 if (((methodinfo*)iptr->val.a)->returntype != TYPE_VOID)
1283                                                         reg_new_temp(dst);
1284                                                 break;
1285                                         }
1286
1287                                 case ICMD_BUILTIN3:
1288                                         reg_free_temp(src);
1289                                         src = src->prev;
1290                                 case ICMD_BUILTIN2:
1291                                         reg_free_temp(src);
1292                                         src = src->prev;
1293                                 case ICMD_BUILTIN1:
1294                                         reg_free_temp(src);
1295                                         src = src->prev;
1296                                         if (iptr->op1 != TYPE_VOID)
1297                                                 reg_new_temp(dst);
1298                                         break;
1299
1300                                 case ICMD_MULTIANEWARRAY:
1301                                         i = iptr->op1;
1302                                         while (--i >= 0) {
1303                                                 reg_free_temp(src);
1304                                                 src = src->prev;
1305                                         }
1306                                         reg_new_temp(dst);
1307                                         break;
1308
1309                                 default:
1310                                         printf("ICMD %d at %d\n", iptr->opc, (int)(iptr-instr));
1311                                         panic("Missing ICMD code during register allocation");
1312                                 } /* switch */
1313                                 iptr++;
1314                         } /* while instructions */
1315                 } /* if */
1316                 bptr = bptr->next;
1317         } /* while blocks */
1318 }
1319
1320
1321 /*
1322  * These are local overrides for various environment variables in Emacs.
1323  * Please do not remove this and leave it at the end of the file, where
1324  * Emacs will automagically detect them.
1325  * ---------------------------------------------------------------------
1326  * Local variables:
1327  * mode: c
1328  * indent-tabs-mode: t
1329  * c-basic-offset: 4
1330  * tab-width: 4
1331  * End:
1332  */