nsz Git - libfirm/blob - ir/lower/lower_dw.c

   1 /*
   2  * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
   3  *
   4  * This file is part of libFirm.
   5  *
   6  * This file may be distributed and/or modified under the terms of the
   7  * GNU General Public License version 2 as published by the Free Software
   8  * Foundation and appearing in the file LICENSE.GPL included in the
   9  * packaging of this file.
  10  *
  11  * Licensees holding valid libFirm Professional Edition licenses may use
  12  * this file in accordance with the libFirm Commercial License.
  13  * Agreement provided with the Software.
  14  *
  15  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  16  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE.
  18  */
  19
  20 /**
  21  * @file
  22  * @brief   Lower Double word operations, ie 64bit -> 32bit, 32bit -> 16bit etc.
  23  * @date    8.10.2004
  24  * @author  Michael Beck
  25  * @version $Id$
  26  */
  27 #include "config.h"
  28
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <assert.h>
  32
  33 #include "error.h"
  34 #include "lowering.h"
  35 #include "irnode_t.h"
  36 #include "irgraph_t.h"
  37 #include "irmode_t.h"
  38 #include "iropt_t.h"
  39 #include "irgmod.h"
  40 #include "tv_t.h"
  41 #include "dbginfo_t.h"
  42 #include "iropt_dbg.h"
  43 #include "irflag_t.h"
  44 #include "firmstat.h"
  45 #include "irgwalk.h"
  46 #include "ircons.h"
  47 #include "irflag.h"
  48 #include "irtools.h"
  49 #include "debug.h"
  50 #include "set.h"
  51 #include "pmap.h"
  52 #include "pdeq.h"
  53 #include "irdump.h"
  54 #include "array_t.h"
  55 #include "irpass_t.h"
  56
  57 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  58 static set *intrinsic_fkt;
  59
  60 /** A map from (imode, omode) to conv function types. */
  61 static set *conv_types;
  62
  63 /** A map from a method type to its lowered type. */
  64 static pmap *lowered_type;
  65
  66 /** The types for the binop and unop intrinsics. */
  67 static ir_type *binop_tp_u, *binop_tp_s, *unop_tp_u, *unop_tp_s, *shiftop_tp_u, *shiftop_tp_s, *tp_s, *tp_u;
  68
  69 /** the debug handle */
  70 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  71
  72 /**
  73  * An entry in the (op, imode, omode) -> entity map.
  74  */
  75 typedef struct op_mode_entry {
  76         const ir_op   *op;    /**< the op */
  77         const ir_mode *imode; /**< the input mode */
  78         const ir_mode *omode; /**< the output mode */
  79         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  80 } op_mode_entry_t;
  81
  82 /**
  83  * An entry in the (imode, omode) -> tp map.
  84  */
  85 typedef struct conv_tp_entry {
  86         const ir_mode *imode; /**< the input mode */
  87         const ir_mode *omode; /**< the output mode */
  88         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
  89 } conv_tp_entry_t;
  90
  91 /**
  92  * Every double word node will be replaced,
  93  * we need some store to hold the replacement:
  94  */
  95 typedef struct node_entry_t {
  96         ir_node *low_word;    /**< the low word */
  97         ir_node *high_word;   /**< the high word */
  98 } node_entry_t;
  99
 100 enum lower_flags {
 101         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 102         CF_CHANGED      = 2,  /**< control flow was changed */
 103 };
 104
 105 /**
 106  * The lower environment.
 107  */
 108 typedef struct lower_env_t {
 109         node_entry_t **entries;       /**< entries per node */
 110         ir_graph      *irg;
 111         struct obstack obst;          /**< an obstack holding the temporary data */
 112         ir_type  *l_mtp;              /**< lowered method type of the current method */
 113         tarval   *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 114         tarval   *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 115         pdeq     *waitq;              /**< a wait queue of all nodes that must be handled later */
 116         pmap     *proj_2_block;       /**< a map from ProjX to its destination blocks */
 117         ir_mode  *high_signed;        /**< doubleword signed type */
 118         ir_mode  *high_unsigned;      /**< doubleword unsigned type */
 119         ir_mode  *low_signed;         /**< word signed type */
 120         ir_mode  *low_unsigned;       /**< word unsigned type */
 121         ident    *first_id;           /**< .l for little and .h for big endian */
 122         ident    *next_id;            /**< .h for little and .l for big endian */
 123         const lwrdw_param_t *params;  /**< transformation parameter */
 124         unsigned flags;               /**< some flags */
 125         unsigned n_entries;           /**< number of entries */
 126         ir_type  *value_param_tp;     /**< the old value param type */
 127 } lower_env_t;
 128
 129 /**
 130  * Create a method type for a Conv emulation from imode to omode.
 131  */
 132 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env)
 133 {
 134         conv_tp_entry_t key, *entry;
 135         ir_type *mtd;
 136
 137         key.imode = imode;
 138         key.omode = omode;
 139         key.mtd   = NULL;
 140
 141         entry = set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 142         if (! entry->mtd) {
 143                 int n_param = 1, n_res = 1;
 144
 145                 if (imode == env->high_signed || imode == env->high_unsigned)
 146                         n_param = 2;
 147                 if (omode == env->high_signed || omode == env->high_unsigned)
 148                         n_res = 2;
 149
 150                 /* create a new one */
 151                 mtd = new_type_method(n_param, n_res);
 152
 153                 /* set param types and result types */
 154                 n_param = 0;
 155                 if (imode == env->high_signed) {
 156                         set_method_param_type(mtd, n_param++, tp_u);
 157                         set_method_param_type(mtd, n_param++, tp_s);
 158                 } else if (imode == env->high_unsigned) {
 159                         set_method_param_type(mtd, n_param++, tp_u);
 160                         set_method_param_type(mtd, n_param++, tp_u);
 161                 } else {
 162                         ir_type *tp = get_type_for_mode(imode);
 163                         set_method_param_type(mtd, n_param++, tp);
 164                 }
 165
 166                 n_res = 0;
 167                 if (omode == env->high_signed) {
 168                         set_method_res_type(mtd, n_res++, tp_u);
 169                         set_method_res_type(mtd, n_res++, tp_s);
 170                 } else if (omode == env->high_unsigned) {
 171                         set_method_res_type(mtd, n_res++, tp_u);
 172                         set_method_res_type(mtd, n_res++, tp_u);
 173                 } else {
 174                         ir_type *tp = get_type_for_mode(omode);
 175                         set_method_res_type(mtd, n_res++, tp);
 176                 }
 177                 entry->mtd = mtd;
 178         } else {
 179                 mtd = entry->mtd;
 180         }
 181         return mtd;
 182 }
 183
 184 /**
 185  * Add an additional control flow input to a block.
 186  * Patch all Phi nodes. The new Phi inputs are copied from
 187  * old input number nr.
 188  */
 189 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 190 {
 191         int i, arity = get_irn_arity(block);
 192         ir_node **in, *phi;
 193
 194         assert(nr < arity);
 195
 196         NEW_ARR_A(ir_node *, in, arity + 1);
 197         for (i = 0; i < arity; ++i)
 198                 in[i] = get_irn_n(block, i);
 199         in[i] = cf;
 200
 201         set_irn_in(block, i + 1, in);
 202
 203         for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
 204                 for (i = 0; i < arity; ++i)
 205                         in[i] = get_irn_n(phi, i);
 206                 in[i] = in[nr];
 207                 set_irn_in(phi, i + 1, in);
 208         }
 209 }
 210
 211 /**
 212  * Add an additional control flow input to a block.
 213  * Patch all Phi nodes. The new Phi inputs are copied from
 214  * old input from cf tmpl.
 215  */
 216 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 217 {
 218         int i, arity = get_irn_arity(block);
 219         int nr = 0;
 220
 221         for (i = 0; i < arity; ++i) {
 222                 if (get_irn_n(block, i) == tmpl) {
 223                         nr = i;
 224                         break;
 225                 }
 226         }
 227         assert(i < arity);
 228         add_block_cf_input_nr(block, nr, cf);
 229 }
 230
 231 /**
 232  * Return the "operational" mode of a Firm node.
 233  */
 234 static ir_mode *get_irn_op_mode(ir_node *node)
 235 {
 236         switch (get_irn_opcode(node)) {
 237         case iro_Load:
 238                 return get_Load_mode(node);
 239         case iro_Store:
 240                 return get_irn_mode(get_Store_value(node));
 241         case iro_DivMod:
 242                 return get_irn_mode(get_DivMod_left(node));
 243         case iro_Div:
 244                 return get_irn_mode(get_Div_left(node));
 245         case iro_Mod:
 246                 return get_irn_mode(get_Mod_left(node));
 247         case iro_Cmp:
 248                 return get_irn_mode(get_Cmp_left(node));
 249         default:
 250                 return get_irn_mode(node);
 251         }
 252 }
 253
 254 /**
 255  * Walker, prepare the node links.
 256  */
 257 static void prepare_links(ir_node *node, void *env)
 258 {
 259         lower_env_t  *lenv = env;
 260         ir_mode      *mode = get_irn_op_mode(node);
 261         node_entry_t *link;
 262         int           i;
 263
 264         if (mode == lenv->high_signed || mode == lenv->high_unsigned) {
 265                 unsigned idx = get_irn_idx(node);
 266                 /* ok, found a node that will be lowered */
 267                 link = OALLOCZ(&lenv->obst, node_entry_t);
 268
 269                 idx = get_irn_idx(node);
 270                 if (idx >= lenv->n_entries) {
 271                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 272                         unsigned old   = lenv->n_entries;
 273                         unsigned n_idx = idx + (idx >> 3);
 274
 275                         ARR_RESIZE(node_entry_t *, lenv->entries, n_idx);
 276                         memset(&lenv->entries[old], 0, (n_idx - old) * sizeof(lenv->entries[0]));
 277                         lenv->n_entries = n_idx;
 278                 }
 279                 lenv->entries[idx] = link;
 280                 lenv->flags |= MUST_BE_LOWERED;
 281         } else if (is_Conv(node)) {
 282                 /* Conv nodes have two modes */
 283                 ir_node *pred = get_Conv_op(node);
 284                 mode = get_irn_mode(pred);
 285
 286                 if (mode == lenv->high_signed ||
 287                         mode == lenv->high_unsigned) {
 288                         /* must lower this node either but don't need a link */
 289                         lenv->flags |= MUST_BE_LOWERED;
 290                 }
 291                 return;
 292         }
 293
 294         if (is_Proj(node)) {
 295                 /* link all Proj nodes to its predecessor:
 296                    Note that Tuple Proj's and its Projs are linked either. */
 297                 ir_node *pred = get_Proj_pred(node);
 298
 299                 set_irn_link(node, get_irn_link(pred));
 300                 set_irn_link(pred, node);
 301         } else if (is_Phi(node)) {
 302                 /* link all Phi nodes to its block */
 303                 ir_node *block = get_nodes_block(node);
 304                 add_Block_phi(block, node);
 305         } else if (is_Block(node)) {
 306                 /* fill the Proj -> Block map */
 307                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 308                         ir_node *pred = get_Block_cfgpred(node, i);
 309
 310                         if (is_Proj(pred))
 311                                 pmap_insert(lenv->proj_2_block, pred, node);
 312                 }
 313         }
 314 }
 315
 316 /**
 317  * Translate a Constant: create two.
 318  */
 319 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env)
 320 {
 321         ir_graph *irg      = get_irn_irg(node);
 322         dbg_info *dbg      = get_irn_dbg_info(node);
 323         ir_mode  *low_mode = env->low_unsigned;
 324         unsigned  idx;
 325         tarval   *tv, *tv_l, *tv_h;
 326         ir_node  *low, *high;
 327
 328         tv   = get_Const_tarval(node);
 329
 330         tv_l = tarval_convert_to(tv, low_mode);
 331         low  = new_rd_Const(dbg, irg, tv_l);
 332
 333         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 334         high = new_rd_Const(dbg, irg, tv_h);
 335
 336         idx = get_irn_idx(node);
 337         assert(idx < env->n_entries);
 338         env->entries[idx]->low_word  = low;
 339         env->entries[idx]->high_word = high;
 340 }
 341
 342 /**
 343  * Translate a Load: create two.
 344  */
 345 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env)
 346 {
 347         ir_mode    *low_mode = env->low_unsigned;
 348         ir_graph   *irg = get_irn_irg(node);
 349         ir_node    *adr = get_Load_ptr(node);
 350         ir_node    *mem = get_Load_mem(node);
 351         ir_node    *low, *high, *proj;
 352         dbg_info   *dbg;
 353         ir_node    *block = get_nodes_block(node);
 354         unsigned    idx;
 355         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 356                                  ? cons_volatile : 0;
 357
 358         if (env->params->little_endian) {
 359                 low  = adr;
 360                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 361         } else {
 362                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 363                 high = adr;
 364         }
 365
 366         /* create two loads */
 367         dbg  = get_irn_dbg_info(node);
 368         low  = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 369         proj = new_r_Proj(low, mode_M, pn_Load_M);
 370         high = new_rd_Load(dbg, block, proj, high, mode, volatility);
 371
 372         idx = get_irn_idx(node);
 373         assert(idx < env->n_entries);
 374         env->entries[idx]->low_word  = low;
 375         env->entries[idx]->high_word = high;
 376
 377         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 378                 idx = get_irn_idx(proj);
 379
 380                 switch (get_Proj_proj(proj)) {
 381                 case pn_Load_M:         /* Memory result. */
 382                         /* put it to the second one */
 383                         set_Proj_pred(proj, high);
 384                         break;
 385                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 386                         /* put it to the first one */
 387                         set_Proj_pred(proj, low);
 388                         break;
 389                 case pn_Load_res:       /* Result of load operation. */
 390                         assert(idx < env->n_entries);
 391                         env->entries[idx]->low_word  = new_r_Proj(low,  low_mode, pn_Load_res);
 392                         env->entries[idx]->high_word = new_r_Proj(high, mode,     pn_Load_res);
 393                         break;
 394                 default:
 395                         assert(0 && "unexpected Proj number");
 396                 }
 397                 /* mark this proj: we have handled it already, otherwise we might fall into
 398                  * out new nodes. */
 399                 mark_irn_visited(proj);
 400         }
 401 }
 402
 403 /**
 404  * Translate a Store: create two.
 405  */
 406 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env)
 407 {
 408         ir_graph     *irg;
 409         ir_node      *block, *adr, *mem;
 410         ir_node      *low, *high, *irn, *proj;
 411         dbg_info     *dbg;
 412         unsigned      idx;
 413         node_entry_t *entry;
 414         ir_cons_flags    volatility = get_Store_volatility(node) == volatility_is_volatile
 415                                    ? cons_volatile : 0;
 416         (void) mode;
 417
 418         irn = get_Store_value(node);
 419         entry = env->entries[get_irn_idx(irn)];
 420         assert(entry);
 421
 422         if (! entry->low_word) {
 423                 /* not ready yet, wait */
 424                 pdeq_putr(env->waitq, node);
 425                 return;
 426         }
 427
 428         irg = get_irn_irg(node);
 429         adr = get_Store_ptr(node);
 430         mem = get_Store_mem(node);
 431         block = get_nodes_block(node);
 432
 433         if (env->params->little_endian) {
 434                 low  = adr;
 435                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 436         } else {
 437                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 438                 high = adr;
 439         }
 440
 441         /* create two Stores */
 442         dbg = get_irn_dbg_info(node);
 443         low  = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 444         proj = new_r_Proj(low, mode_M, pn_Store_M);
 445         high = new_rd_Store(dbg, block, proj, high, entry->high_word, volatility);
 446
 447         idx = get_irn_idx(node);
 448         assert(idx < env->n_entries);
 449         env->entries[idx]->low_word  = low;
 450         env->entries[idx]->high_word = high;
 451
 452         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 453                 idx = get_irn_idx(proj);
 454
 455                 switch (get_Proj_proj(proj)) {
 456                 case pn_Store_M:         /* Memory result. */
 457                         /* put it to the second one */
 458                         set_Proj_pred(proj, high);
 459                         break;
 460                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 461                         /* put it to the first one */
 462                         set_Proj_pred(proj, low);
 463                         break;
 464                 default:
 465                         assert(0 && "unexpected Proj number");
 466                 }
 467                 /* mark this proj: we have handled it already, otherwise we might fall into
 468                  * out new nodes. */
 469                 mark_irn_visited(proj);
 470         }
 471 }
 472
 473 /**
 474  * Return a node containing the address of the intrinsic emulation function.
 475  *
 476  * @param method  the method type of the emulation function
 477  * @param op      the emulated ir_op
 478  * @param imode   the input mode of the emulated opcode
 479  * @param omode   the output mode of the emulated opcode
 480  * @param env     the lower environment
 481  */
 482 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 483                                       ir_mode *imode, ir_mode *omode,
 484                                       lower_env_t *env)
 485 {
 486         symconst_symbol sym;
 487         ir_entity *ent;
 488         op_mode_entry_t key, *entry;
 489
 490         key.op    = op;
 491         key.imode = imode;
 492         key.omode = omode;
 493         key.ent   = NULL;
 494
 495         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 496                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 497         if (! entry->ent) {
 498                 /* create a new one */
 499                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 500
 501                 assert(ent && "Intrinsic creator must return an entity");
 502                 entry->ent = ent;
 503         } else {
 504                 ent = entry->ent;
 505         }
 506         sym.entity_p = ent;
 507         return new_r_SymConst(env->irg, mode_P_code, sym, symconst_addr_ent);
 508 }
 509
 510 /**
 511  * Translate a Div.
 512  *
 513  * Create an intrinsic Call.
 514  */
 515 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env)
 516 {
 517         ir_node  *block, *irn, *call, *proj;
 518         ir_node  *in[4];
 519         ir_mode  *opmode;
 520         dbg_info *dbg;
 521         ir_type  *mtp;
 522         unsigned  idx;
 523         node_entry_t *entry;
 524
 525         irn   = get_Div_left(node);
 526         entry = env->entries[get_irn_idx(irn)];
 527         assert(entry);
 528
 529         if (! entry->low_word) {
 530                 /* not ready yet, wait */
 531                 pdeq_putr(env->waitq, node);
 532                 return;
 533         }
 534
 535         in[0] = entry->low_word;
 536         in[1] = entry->high_word;
 537
 538         irn   = get_Div_right(node);
 539         entry = env->entries[get_irn_idx(irn)];
 540         assert(entry);
 541
 542         if (! entry->low_word) {
 543                 /* not ready yet, wait */
 544                 pdeq_putr(env->waitq, node);
 545                 return;
 546         }
 547
 548         in[2] = entry->low_word;
 549         in[3] = entry->high_word;
 550
 551         dbg   = get_irn_dbg_info(node);
 552         block = get_nodes_block(node);
 553
 554         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 555         opmode = get_irn_op_mode(node);
 556         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 557         call = new_rd_Call(dbg, block, get_Div_mem(node), irn, 4, in, mtp);
 558         set_irn_pinned(call, get_irn_pinned(node));
 559         irn = new_r_Proj(call, mode_T, pn_Call_T_result);
 560
 561         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 562                 switch (get_Proj_proj(proj)) {
 563                 case pn_Div_M:         /* Memory result. */
 564                         /* reroute to the call */
 565                         set_Proj_pred(proj, call);
 566                         set_Proj_proj(proj, pn_Call_M);
 567                         break;
 568                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 569                         /* reroute to the call */
 570                         set_Proj_pred(proj, call);
 571                         set_Proj_proj(proj, pn_Call_X_except);
 572                         break;
 573                 case pn_Div_res:       /* Result of computation. */
 574                         idx = get_irn_idx(proj);
 575                         assert(idx < env->n_entries);
 576                         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 577                         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 578                         break;
 579                 default:
 580                         assert(0 && "unexpected Proj number");
 581                 }
 582                 /* mark this proj: we have handled it already, otherwise we might fall into
 583                  * out new nodes. */
 584                 mark_irn_visited(proj);
 585         }
 586 }
 587
 588 /**
 589  * Translate a Mod.
 590  *
 591  * Create an intrinsic Call.
 592  */
 593 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env)
 594 {
 595         ir_node  *block, *proj, *irn, *call;
 596         ir_node  *in[4];
 597         ir_mode  *opmode;
 598         dbg_info *dbg;
 599         ir_type  *mtp;
 600         unsigned  idx;
 601         node_entry_t *entry;
 602
 603         irn   = get_Mod_left(node);
 604         entry = env->entries[get_irn_idx(irn)];
 605         assert(entry);
 606
 607         if (! entry->low_word) {
 608                 /* not ready yet, wait */
 609                 pdeq_putr(env->waitq, node);
 610                 return;
 611         }
 612
 613         in[0] = entry->low_word;
 614         in[1] = entry->high_word;
 615
 616         irn   = get_Mod_right(node);
 617         entry = env->entries[get_irn_idx(irn)];
 618         assert(entry);
 619
 620         if (! entry->low_word) {
 621                 /* not ready yet, wait */
 622                 pdeq_putr(env->waitq, node);
 623                 return;
 624         }
 625
 626         in[2] = entry->low_word;
 627         in[3] = entry->high_word;
 628
 629         dbg   = get_irn_dbg_info(node);
 630         block = get_nodes_block(node);
 631
 632         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 633         opmode = get_irn_op_mode(node);
 634         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 635         call = new_rd_Call(dbg, block, get_Mod_mem(node), irn, 4, in, mtp);
 636         set_irn_pinned(call, get_irn_pinned(node));
 637         irn = new_r_Proj(call, mode_T, pn_Call_T_result);
 638
 639         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 640                 switch (get_Proj_proj(proj)) {
 641                 case pn_Mod_M:         /* Memory result. */
 642                         /* reroute to the call */
 643                         set_Proj_pred(proj, call);
 644                         set_Proj_proj(proj, pn_Call_M);
 645                         break;
 646                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 647                         /* reroute to the call */
 648                         set_Proj_pred(proj, call);
 649                         set_Proj_proj(proj, pn_Call_X_except);
 650                         break;
 651                 case pn_Mod_res:       /* Result of computation. */
 652                         idx = get_irn_idx(proj);
 653                         assert(idx < env->n_entries);
 654                         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 655                         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 656                         break;
 657                 default:
 658                         assert(0 && "unexpected Proj number");
 659                 }
 660                 /* mark this proj: we have handled it already, otherwise we might fall into
 661                  * out new nodes. */
 662                 mark_irn_visited(proj);
 663         }
 664 }
 665
 666 /**
 667  * Translate a DivMod.
 668  *
 669  * Create two intrinsic Calls.
 670  */
 671 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env)
 672 {
 673         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod;
 674         ir_node  *resDiv = NULL;
 675         ir_node  *resMod = NULL;
 676         ir_node  *in[4];
 677         ir_mode  *opmode;
 678         dbg_info *dbg;
 679         ir_type  *mtp;
 680         unsigned  idx;
 681         node_entry_t *entry;
 682         unsigned flags = 0;
 683
 684         /* check if both results are needed */
 685         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 686                 switch (get_Proj_proj(proj)) {
 687                 case pn_DivMod_res_div: flags |= 1; break;
 688                 case pn_DivMod_res_mod: flags |= 2; break;
 689                 default: break;
 690                 }
 691         }
 692
 693         irn   = get_DivMod_left(node);
 694         entry = env->entries[get_irn_idx(irn)];
 695         assert(entry);
 696
 697         if (! entry->low_word) {
 698                 /* not ready yet, wait */
 699                 pdeq_putr(env->waitq, node);
 700                 return;
 701         }
 702
 703         in[0] = entry->low_word;
 704         in[1] = entry->high_word;
 705
 706         irn   = get_DivMod_right(node);
 707         entry = env->entries[get_irn_idx(irn)];
 708         assert(entry);
 709
 710         if (! entry->low_word) {
 711                 /* not ready yet, wait */
 712                 pdeq_putr(env->waitq, node);
 713                 return;
 714         }
 715
 716         in[2] = entry->low_word;
 717         in[3] = entry->high_word;
 718
 719         dbg   = get_irn_dbg_info(node);
 720         block = get_nodes_block(node);
 721
 722         mem = get_DivMod_mem(node);
 723
 724         callDiv = callMod = NULL;
 725         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 726         if (flags & 1) {
 727                 opmode = get_irn_op_mode(node);
 728                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, env);
 729                 callDiv = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 730                 set_irn_pinned(callDiv, get_irn_pinned(node));
 731                 resDiv = new_r_Proj(callDiv, mode_T, pn_Call_T_result);
 732         }
 733         if (flags & 2) {
 734                 if (flags & 1)
 735                         mem = new_r_Proj(callDiv, mode_M, pn_Call_M);
 736                 opmode = get_irn_op_mode(node);
 737                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, env);
 738                 callMod = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 739                 set_irn_pinned(callMod, get_irn_pinned(node));
 740                 resMod = new_r_Proj(callMod, mode_T, pn_Call_T_result);
 741         }
 742
 743         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 744                 switch (get_Proj_proj(proj)) {
 745                 case pn_DivMod_M:         /* Memory result. */
 746                         /* reroute to the first call */
 747                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 748                         set_Proj_proj(proj, pn_Call_M);
 749                         break;
 750                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 751                         /* reroute to the first call */
 752                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 753                         set_Proj_proj(proj, pn_Call_X_except);
 754                         break;
 755                 case pn_DivMod_res_div:   /* Result of Div. */
 756                         idx = get_irn_idx(proj);
 757                         assert(idx < env->n_entries);
 758                         env->entries[idx]->low_word  = new_r_Proj(resDiv, env->low_unsigned, 0);
 759                         env->entries[idx]->high_word = new_r_Proj(resDiv, mode,                      1);
 760                         break;
 761                 case pn_DivMod_res_mod:   /* Result of Mod. */
 762                         idx = get_irn_idx(proj);
 763                         env->entries[idx]->low_word  = new_r_Proj(resMod, env->low_unsigned, 0);
 764                         env->entries[idx]->high_word = new_r_Proj(resMod, mode,                      1);
 765                         break;
 766                 default:
 767                         assert(0 && "unexpected Proj number");
 768                 }
 769                 /* mark this proj: we have handled it already, otherwise we might fall into
 770                  * out new nodes. */
 771                 mark_irn_visited(proj);
 772         }
 773 }
 774
 775 /**
 776  * Translate a Binop.
 777  *
 778  * Create an intrinsic Call.
 779  */
 780 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env)
 781 {
 782         ir_node  *block, *irn;
 783         ir_node  *in[4];
 784         dbg_info *dbg;
 785         ir_type  *mtp;
 786         unsigned  idx;
 787         ir_graph *irg;
 788         node_entry_t *entry;
 789
 790         irn   = get_binop_left(node);
 791         entry = env->entries[get_irn_idx(irn)];
 792         assert(entry);
 793
 794         if (! entry->low_word) {
 795                 /* not ready yet, wait */
 796                 pdeq_putr(env->waitq, node);
 797                 return;
 798         }
 799
 800         in[0] = entry->low_word;
 801         in[1] = entry->high_word;
 802
 803         irn   = get_binop_right(node);
 804         entry = env->entries[get_irn_idx(irn)];
 805         assert(entry);
 806
 807         if (! entry->low_word) {
 808                 /* not ready yet, wait */
 809                 pdeq_putr(env->waitq, node);
 810                 return;
 811         }
 812
 813         in[2] = entry->low_word;
 814         in[3] = entry->high_word;
 815
 816         dbg   = get_irn_dbg_info(node);
 817         block = get_nodes_block(node);
 818         irg   = get_irn_irg(block);
 819
 820         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 821         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 822         irn = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 4, in, mtp);
 823         set_irn_pinned(irn, get_irn_pinned(node));
 824         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
 825
 826         idx = get_irn_idx(node);
 827         assert(idx < env->n_entries);
 828         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 829         env->entries[idx]->high_word = new_r_Proj(irn, mode,              1);
 830 }
 831
 832 /**
 833  * Translate a Shiftop.
 834  *
 835  * Create an intrinsic Call.
 836  */
 837 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env)
 838 {
 839         ir_node  *block, *irn;
 840         ir_node  *in[3];
 841         dbg_info *dbg;
 842         ir_type  *mtp;
 843         unsigned  idx;
 844         ir_graph *irg;
 845         node_entry_t *entry;
 846
 847         irn   = get_binop_left(node);
 848         entry = env->entries[get_irn_idx(irn)];
 849         assert(entry);
 850
 851         if (! entry->low_word) {
 852                 /* not ready yet, wait */
 853                 pdeq_putr(env->waitq, node);
 854                 return;
 855         }
 856
 857         in[0] = entry->low_word;
 858         in[1] = entry->high_word;
 859
 860         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 861         in[2] = get_binop_right(node);
 862         assert(get_irn_mode(in[2]) != env->high_signed
 863                         && get_irn_mode(in[2]) != env->high_unsigned);
 864
 865         dbg   = get_irn_dbg_info(node);
 866         block = get_nodes_block(node);
 867         irg   = get_irn_irg(block);
 868
 869         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 870         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 871         irn = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 3, in, mtp);
 872         set_irn_pinned(irn, get_irn_pinned(node));
 873         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
 874
 875         idx = get_irn_idx(node);
 876         assert(idx < env->n_entries);
 877         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 878         env->entries[idx]->high_word = new_r_Proj(irn, mode,              1);
 879 }
 880
 881 /**
 882  * Translate a Shr and handle special cases.
 883  */
 884 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env)
 885 {
 886         ir_graph *irg   = get_irn_irg(node);
 887         ir_node  *right = get_Shr_right(node);
 888
 889         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 890                 tarval *tv = get_Const_tarval(right);
 891
 892                 if (tarval_is_long(tv) &&
 893                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 894                         ir_node *block        = get_nodes_block(node);
 895                         ir_node *left         = get_Shr_left(node);
 896                         ir_mode *low_unsigned = env->low_unsigned;
 897                         ir_node *c;
 898                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 899                         unsigned idx = get_irn_idx(left);
 900
 901                         left = env->entries[idx]->high_word;
 902                         if (left == NULL) {
 903                                 /* not ready yet, wait */
 904                                 pdeq_putr(env->waitq, node);
 905                                 return;
 906                         }
 907
 908                         idx = get_irn_idx(node);
 909                         /* convert high word into low_unsigned mode if necessary */
 910                         if (get_irn_mode(left) != low_unsigned)
 911                                 left = new_r_Conv(block, left, low_unsigned);
 912
 913                         if (shf_cnt > 0) {
 914                                 c = new_r_Const_long(irg, low_unsigned, shf_cnt);
 915                                 env->entries[idx]->low_word = new_r_Shr(block, left, c,
 916                                                                         low_unsigned);
 917                         } else {
 918                                 env->entries[idx]->low_word = left;
 919                         }
 920                         env->entries[idx]->high_word = new_r_Const(irg, get_mode_null(mode));
 921
 922                         return;
 923                 }
 924         }
 925         lower_Shiftop(node, mode, env);
 926 }
 927
 928 /**
 929  * Translate a Shl and handle special cases.
 930  */
 931 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env)
 932 {
 933         ir_graph *irg   = get_irn_irg(node);
 934         ir_node  *right = get_Shl_right(node);
 935
 936         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 937                 tarval *tv = get_Const_tarval(right);
 938
 939                 if (tarval_is_long(tv) &&
 940                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 941                         ir_mode *mode_l;
 942                         ir_node *block = get_nodes_block(node);
 943                         ir_node *left = get_Shl_left(node);
 944                         ir_node *c;
 945                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 946                         unsigned idx = get_irn_idx(left);
 947
 948                         left = env->entries[idx]->low_word;
 949                         if (left == NULL) {
 950                                 /* not ready yet, wait */
 951                                 pdeq_putr(env->waitq, node);
 952                                 return;
 953                         }
 954
 955                         left = new_r_Conv(block, left, mode);
 956                         idx = get_irn_idx(node);
 957
 958                         mode_l = env->low_unsigned;
 959                         if (shf_cnt > 0) {
 960                                 c = new_r_Const_long(irg, mode_l, shf_cnt);
 961                                 env->entries[idx]->high_word = new_r_Shl(block, left, c, mode);
 962                         } else {
 963                                 env->entries[idx]->high_word = left;
 964                         }
 965                         env->entries[idx]->low_word  = new_r_Const(irg, get_mode_null(mode_l));
 966
 967                         return;
 968                 }
 969         }
 970         lower_Shiftop(node, mode, env);
 971 }
 972
 973 /**
 974  * Translate a Shrs and handle special cases.
 975  */
 976 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env)
 977 {
 978         ir_graph *irg   = get_irn_irg(node);
 979         ir_node  *right = get_Shrs_right(node);
 980
 981         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 982                 tarval *tv = get_Const_tarval(right);
 983
 984                 if (tarval_is_long(tv) &&
 985                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 986                         ir_node *block         = get_nodes_block(node);
 987                         ir_node *left          = get_Shrs_left(node);
 988                         ir_mode *low_unsigned  = env->low_unsigned;
 989                         long     shf_cnt       = get_tarval_long(tv) - get_mode_size_bits(mode);
 990                         unsigned idx           = get_irn_idx(left);
 991                         ir_node *left_unsigned = left;
 992                         ir_node *low;
 993                         ir_node *c;
 994
 995                         left = env->entries[idx]->high_word;
 996                         if (left == NULL) {
 997                                 /* not ready yet, wait */
 998                                 pdeq_putr(env->waitq, node);
 999                                 return;
1000                         }
1001
1002                         idx = get_irn_idx(node);
1003                         /* convert high word into low_unsigned mode if necessary */
1004                         if (get_irn_mode(left_unsigned) != low_unsigned)
1005                                 left_unsigned = new_r_Conv(block, left, low_unsigned);
1006
1007                         if (shf_cnt > 0) {
1008                                 c   = new_r_Const_long(irg, low_unsigned, shf_cnt);
1009                                 low = new_r_Shrs(block, left_unsigned, c, low_unsigned);
1010                         } else {
1011                                 low = left_unsigned;
1012                         }
1013                         /* low word is expected to have low_unsigned */
1014                         env->entries[idx]->low_word = new_r_Conv(block, low, low_unsigned);
1015
1016                         c = new_r_Const_long(irg, low_unsigned,
1017                                              get_mode_size_bits(mode) - 1);
1018                         env->entries[idx]->high_word = new_r_Shrs(block, left, c, mode);
1019
1020                         return;
1021                 }
1022         }
1023         lower_Shiftop(node, mode, env);
1024 }
1025
1026 /**
1027  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1028  */
1029 static void prepare_links_and_handle_rotl(ir_node *node, void *env)
1030 {
1031         lower_env_t *lenv = env;
1032
1033         if (is_Rotl(node)) {
1034                 ir_mode *mode = get_irn_op_mode(node);
1035                         if (mode == lenv->high_signed ||
1036                             mode == lenv->high_unsigned) {
1037                                 ir_node  *right = get_Rotl_right(node);
1038                                 ir_node  *left, *shl, *shr, *or, *block, *sub, *c;
1039                                 ir_mode  *omode, *rmode;
1040                                 ir_graph *irg;
1041                                 dbg_info *dbg;
1042                                 optimization_state_t state;
1043
1044                                 if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1045                                         tarval *tv = get_Const_tarval(right);
1046
1047                                         if (tarval_is_long(tv) &&
1048                                             get_tarval_long(tv) == (long)get_mode_size_bits(mode)) {
1049                                                 /* will be optimized in lower_Rotl() */
1050                                                 return;
1051                                         }
1052                                 }
1053
1054                                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) and lower those */
1055                                 irg   = get_irn_irg(node);
1056                                 dbg   = get_irn_dbg_info(node);
1057                                 omode = get_irn_mode(node);
1058                                 left  = get_Rotl_left(node);
1059                                 block = get_nodes_block(node);
1060                                 shl   = new_rd_Shl(dbg, block, left, right, omode);
1061                                 rmode = get_irn_mode(right);
1062                                 c     = new_r_Const_long(irg, rmode, get_mode_size_bits(omode));
1063                                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
1064                                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
1065
1066                                 /* optimization must be switched off here, or we will get the Rotl back */
1067                                 save_optimization_state(&state);
1068                                 set_opt_algebraic_simplification(0);
1069                                 or = new_rd_Or(dbg, block, shl, shr, omode);
1070                                 restore_optimization_state(&state);
1071
1072                                 exchange(node, or);
1073
1074                                 /* do lowering on the new nodes */
1075                                 prepare_links(shl, env);
1076                                 prepare_links(c, env);
1077                                 prepare_links(sub, env);
1078                                 prepare_links(shr, env);
1079                                 prepare_links(or, env);
1080                         }
1081         } else {
1082                 prepare_links(node, env);
1083         }
1084 }
1085
1086 /**
1087  * Translate a special case Rotl(x, sizeof(w)).
1088  */
1089 static void lower_Rotl(ir_node *node, ir_mode *mode, lower_env_t *env)
1090 {
1091         ir_node *right = get_Rotl_right(node);
1092         ir_node *left = get_Rotl_left(node);
1093         ir_node *h, *l;
1094         unsigned idx = get_irn_idx(left);
1095         (void) right;
1096         (void) mode;
1097
1098         assert(get_mode_arithmetic(mode) == irma_twos_complement &&
1099                is_Const(right) && tarval_is_long(get_Const_tarval(right)) &&
1100                get_tarval_long(get_Const_tarval(right)) == (long)get_mode_size_bits(mode));
1101
1102         l = env->entries[idx]->low_word;
1103         h = env->entries[idx]->high_word;
1104         idx = get_irn_idx(node);
1105
1106         env->entries[idx]->low_word  = h;
1107         env->entries[idx]->high_word = l;
1108 }
1109
1110 /**
1111  * Translate an Unop.
1112  *
1113  * Create an intrinsic Call.
1114  */
1115 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env)
1116 {
1117         ir_node  *block, *irn;
1118         ir_node  *in[2];
1119         dbg_info *dbg;
1120         ir_type  *mtp;
1121         ir_graph *irg;
1122         unsigned  idx;
1123         node_entry_t *entry;
1124
1125         irn   = get_unop_op(node);
1126         entry = env->entries[get_irn_idx(irn)];
1127         assert(entry);
1128
1129         if (! entry->low_word) {
1130                 /* not ready yet, wait */
1131                 pdeq_putr(env->waitq, node);
1132                 return;
1133         }
1134
1135         in[0] = entry->low_word;
1136         in[1] = entry->high_word;
1137
1138         dbg   = get_irn_dbg_info(node);
1139         block = get_nodes_block(node);
1140         irg   = get_irn_irg(block);
1141
1142         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1143         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
1144         irn = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1145         set_irn_pinned(irn, get_irn_pinned(node));
1146         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
1147
1148         idx = get_irn_idx(node);
1149         assert(idx < env->n_entries);
1150         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
1151         env->entries[idx]->high_word = new_r_Proj(irn, mode,              1);
1152 }
1153
1154 /**
1155  * Translate a logical Binop.
1156  *
1157  * Create two logical Binops.
1158  */
1159 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1160                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1161         ir_node  *block, *irn;
1162         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1163         dbg_info *dbg;
1164         unsigned  idx;
1165         ir_graph *irg;
1166         node_entry_t *entry;
1167
1168         irn   = get_binop_left(node);
1169         entry = env->entries[get_irn_idx(irn)];
1170         assert(entry);
1171
1172         if (! entry->low_word) {
1173                 /* not ready yet, wait */
1174                 pdeq_putr(env->waitq, node);
1175                 return;
1176         }
1177
1178         lop_l = entry->low_word;
1179         lop_h = entry->high_word;
1180
1181         irn   = get_binop_right(node);
1182         entry = env->entries[get_irn_idx(irn)];
1183         assert(entry);
1184
1185         if (! entry->low_word) {
1186                 /* not ready yet, wait */
1187                 pdeq_putr(env->waitq, node);
1188                 return;
1189         }
1190
1191         rop_l = entry->low_word;
1192         rop_h = entry->high_word;
1193
1194         dbg = get_irn_dbg_info(node);
1195         block = get_nodes_block(node);
1196
1197         idx = get_irn_idx(node);
1198         assert(idx < env->n_entries);
1199         irg = get_irn_irg(node);
1200         env->entries[idx]->low_word  = constr_rd(dbg, block, lop_l, rop_l, env->low_unsigned);
1201         env->entries[idx]->high_word = constr_rd(dbg, block, lop_h, rop_h, mode);
1202 }
1203
1204 /** create a logical operation transformation */
1205 #define lower_logical(op)                                                \
1206 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1207         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1208 }
1209
1210 lower_logical(And)
1211 lower_logical(Or)
1212 lower_logical(Eor)
1213
1214 /**
1215  * Translate a Not.
1216  *
1217  * Create two logical Nots.
1218  */
1219 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env)
1220 {
1221         ir_node  *block, *irn;
1222         ir_node  *op_l, *op_h;
1223         dbg_info *dbg;
1224         unsigned  idx;
1225         node_entry_t *entry;
1226
1227         irn   = get_Not_op(node);
1228         entry = env->entries[get_irn_idx(irn)];
1229         assert(entry);
1230
1231         if (! entry->low_word) {
1232                 /* not ready yet, wait */
1233                 pdeq_putr(env->waitq, node);
1234                 return;
1235         }
1236
1237         op_l = entry->low_word;
1238         op_h = entry->high_word;
1239
1240         dbg   = get_irn_dbg_info(node);
1241         block = get_nodes_block(node);
1242
1243         idx = get_irn_idx(node);
1244         assert(idx < env->n_entries);
1245         env->entries[idx]->low_word  = new_rd_Not(dbg, block, op_l, env->low_unsigned);
1246         env->entries[idx]->high_word = new_rd_Not(dbg, block, op_h, mode);
1247 }
1248
1249 /**
1250  * Translate a Cond.
1251  */
1252 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env)
1253 {
1254         ir_node *cmp, *left, *right, *block;
1255         ir_node *sel = get_Cond_selector(node);
1256         ir_mode *m = get_irn_mode(sel);
1257         unsigned idx;
1258         (void) mode;
1259
1260         if (m == mode_b) {
1261                 node_entry_t *lentry, *rentry;
1262                 ir_node  *proj, *projT = NULL, *projF = NULL;
1263                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1264                 ir_node  *projHF, *projHT;
1265                 ir_node  *dst_blk;
1266                 pn_Cmp   pnc;
1267                 ir_graph *irg;
1268                 dbg_info *dbg;
1269
1270                 if (!is_Proj(sel))
1271                         return;
1272
1273                 cmp   = get_Proj_pred(sel);
1274                 if (!is_Cmp(cmp))
1275                         return;
1276
1277                 left  = get_Cmp_left(cmp);
1278                 idx   = get_irn_idx(left);
1279                 lentry = env->entries[idx];
1280
1281                 if (! lentry) {
1282                         /* a normal Cmp */
1283                         return;
1284                 }
1285
1286                 right = get_Cmp_right(cmp);
1287                 idx   = get_irn_idx(right);
1288                 rentry = env->entries[idx];
1289                 assert(rentry);
1290
1291                 if (! lentry->low_word || !rentry->low_word) {
1292                         /* not yet ready */
1293                         pdeq_putr(env->waitq, node);
1294                         return;
1295                 }
1296
1297                 /* all right, build the code */
1298                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1299                         long proj_nr = get_Proj_proj(proj);
1300
1301                         if (proj_nr == pn_Cond_true) {
1302                                 assert(projT == NULL && "more than one Proj(true)");
1303                                 projT = proj;
1304                         } else {
1305                                 assert(proj_nr == pn_Cond_false);
1306                                 assert(projF == NULL && "more than one Proj(false)");
1307                                 projF = proj;
1308                         }
1309                         mark_irn_visited(proj);
1310                 }
1311                 assert(projT && projF);
1312
1313                 /* create a new high compare */
1314                 block = get_nodes_block(node);
1315                 irg   = get_Block_irg(block);
1316                 dbg   = get_irn_dbg_info(cmp);
1317                 pnc   = get_Proj_proj(sel);
1318
1319                 if (is_Const(right) && is_Const_null(right)) {
1320                         if (pnc == pn_Cmp_Eq || pnc == pn_Cmp_Lg) {
1321                                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1322                                 ir_mode *mode = env->low_unsigned;
1323                                 ir_node *low  = new_r_Conv(block, lentry->low_word, mode);
1324                                 ir_node *high = new_r_Conv(block, lentry->high_word, mode);
1325                                 ir_node *or   = new_rd_Or(dbg, block, low, high, mode);
1326                                 ir_node *cmp  = new_rd_Cmp(dbg, block, or, new_r_Const_long(irg, mode, 0));
1327
1328                                 ir_node *proj = new_r_Proj(cmp, mode_b, pnc);
1329                                 set_Cond_selector(node, proj);
1330                                 return;
1331                         }
1332                 }
1333
1334                 cmpH = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word);
1335
1336                 if (pnc == pn_Cmp_Eq) {
1337                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1338                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1339
1340                         assert(entry);
1341                         dst_blk = entry->value;
1342
1343                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Eq);
1344                         dbg = get_irn_dbg_info(node);
1345                         irn = new_rd_Cond(dbg, block, irn);
1346
1347                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1348                         mark_irn_visited(projHF);
1349                         exchange(projF, projHF);
1350
1351                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1352                         mark_irn_visited(projHT);
1353
1354                         new_bl = new_r_Block(irg, 1, &projHT);
1355
1356                         dbg   = get_irn_dbg_info(cmp);
1357                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1358                         irn = new_r_Proj(cmpL, mode_b, pn_Cmp_Eq);
1359                         dbg = get_irn_dbg_info(node);
1360                         irn = new_rd_Cond(dbg, new_bl, irn);
1361
1362                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1363                         mark_irn_visited(proj);
1364                         add_block_cf_input(dst_blk, projHF, proj);
1365
1366                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1367                         mark_irn_visited(proj);
1368                         exchange(projT, proj);
1369                 } else if (pnc == pn_Cmp_Lg) {
1370                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1371                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1372
1373                         assert(entry);
1374                         dst_blk = entry->value;
1375
1376                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Lg);
1377                         dbg = get_irn_dbg_info(node);
1378                         irn = new_rd_Cond(dbg, block, irn);
1379
1380                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1381                         mark_irn_visited(projHT);
1382                         exchange(projT, projHT);
1383
1384                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1385                         mark_irn_visited(projHF);
1386
1387                         new_bl = new_r_Block(irg, 1, &projHF);
1388
1389                         dbg   = get_irn_dbg_info(cmp);
1390                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1391                         irn = new_r_Proj(cmpL, mode_b, pn_Cmp_Lg);
1392                         dbg = get_irn_dbg_info(node);
1393                         irn = new_rd_Cond(dbg, new_bl, irn);
1394
1395                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1396                         mark_irn_visited(proj);
1397                         add_block_cf_input(dst_blk, projHT, proj);
1398
1399                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1400                         mark_irn_visited(proj);
1401                         exchange(projF, proj);
1402                 } else {
1403                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1404                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1405                         pmap_entry *entry;
1406
1407                         entry = pmap_find(env->proj_2_block, projT);
1408                         assert(entry);
1409                         dstT = entry->value;
1410
1411                         entry = pmap_find(env->proj_2_block, projF);
1412                         assert(entry);
1413                         dstF = entry->value;
1414
1415                         irn = new_r_Proj(cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1416                         dbg = get_irn_dbg_info(node);
1417                         irn = new_rd_Cond(dbg, block, irn);
1418
1419                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1420                         mark_irn_visited(projHT);
1421                         exchange(projT, projHT);
1422                         projT = projHT;
1423
1424                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1425                         mark_irn_visited(projHF);
1426
1427                         newbl_eq = new_r_Block(irg, 1, &projHF);
1428
1429                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Eq);
1430                         irn = new_rd_Cond(dbg, newbl_eq, irn);
1431
1432                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1433                         mark_irn_visited(proj);
1434                         exchange(projF, proj);
1435                         projF = proj;
1436
1437                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1438                         mark_irn_visited(proj);
1439
1440                         newbl_l = new_r_Block(irg, 1, &proj);
1441
1442                         dbg   = get_irn_dbg_info(cmp);
1443                         cmpL = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word);
1444                         irn = new_r_Proj(cmpL, mode_b, pnc);
1445                         dbg = get_irn_dbg_info(node);
1446                         irn = new_rd_Cond(dbg, newbl_l, irn);
1447
1448                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1449                         mark_irn_visited(proj);
1450                         add_block_cf_input(dstT, projT, proj);
1451
1452                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1453                         mark_irn_visited(proj);
1454                         add_block_cf_input(dstF, projF, proj);
1455                 }
1456
1457                 /* we have changed the control flow */
1458                 env->flags |= CF_CHANGED;
1459         } else {
1460                 idx = get_irn_idx(sel);
1461
1462                 if (env->entries[idx]) {
1463                         /*
1464                            Bad, a jump-table with double-word index.
1465                            This should not happen, but if it does we handle
1466                            it like a Conv were between (in other words, ignore
1467                            the high part.
1468                          */
1469
1470                         if (! env->entries[idx]->low_word) {
1471                                 /* not ready yet, wait */
1472                                 pdeq_putr(env->waitq, node);
1473                                 return;
1474                         }
1475                         set_Cond_selector(node, env->entries[idx]->low_word);
1476                 }
1477         }
1478 }
1479
1480 /**
1481  * Translate a Conv to higher_signed
1482  */
1483 static void lower_Conv_to_Ll(ir_node *node, lower_env_t *env)
1484 {
1485         ir_mode  *omode        = get_irn_mode(node);
1486         ir_node  *op           = get_Conv_op(node);
1487         ir_mode  *imode        = get_irn_mode(op);
1488         unsigned  idx          = get_irn_idx(node);
1489         ir_graph *irg          = get_irn_irg(node);
1490         ir_node  *block        = get_nodes_block(node);
1491         dbg_info *dbg          = get_irn_dbg_info(node);
1492         node_entry_t *entry = env->entries[idx];
1493         ir_mode  *low_unsigned = env->low_unsigned;
1494         ir_mode  *low_signed
1495                 = mode_is_signed(omode) ? env->low_signed : low_unsigned;
1496
1497         assert(idx < env->n_entries);
1498
1499         if (mode_is_int(imode) || mode_is_reference(imode)) {
1500                 if (imode == env->high_signed
1501                                 || imode == env->high_unsigned) {
1502                         /* a Conv from Lu to Ls or Ls to Lu */
1503                         unsigned      op_idx   = get_irn_idx(op);
1504                         node_entry_t *op_entry = env->entries[op_idx];
1505
1506                         if (! op_entry->low_word) {
1507                                 /* not ready yet, wait */
1508                                 pdeq_putr(env->waitq, node);
1509                                 return;
1510                         }
1511                         entry->low_word  = op_entry->low_word;
1512                         entry->high_word = new_rd_Conv(dbg, block, op_entry->high_word,
1513                                                        low_signed);
1514                 } else {
1515                         /* simple case: create a high word */
1516                         if (imode != low_unsigned)
1517                                 op = new_rd_Conv(dbg, block, op, low_unsigned);
1518
1519                         entry->low_word = op;
1520
1521                         if (mode_is_signed(imode)) {
1522                                 int      c       = get_mode_size_bits(low_signed) - 1;
1523                                 ir_node *cnst    = new_r_Const_long(irg, low_unsigned, c);
1524                                 if (get_irn_mode(op) != low_signed)
1525                                         op = new_rd_Conv(dbg, block, op, low_signed);
1526                                 entry->high_word = new_rd_Shrs(dbg, block, op, cnst,
1527                                                                low_signed);
1528                         } else {
1529                                 entry->high_word = new_r_Const(irg, get_mode_null(low_signed));
1530                         }
1531                 }
1532         } else if (imode == mode_b) {
1533                 entry->low_word = new_rd_Conv(dbg, block, op, low_unsigned);
1534                 entry->high_word = new_r_Const(irg, get_mode_null(low_signed));
1535         } else {
1536                 ir_node *irn, *call;
1537                 ir_type *mtp = get_conv_type(imode, omode, env);
1538
1539                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1540                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1541                 set_irn_pinned(call, get_irn_pinned(node));
1542                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1543
1544                 entry->low_word  = new_r_Proj(irn, low_unsigned, 0);
1545                 entry->high_word = new_r_Proj(irn, low_signed, 1);
1546         }
1547 }
1548
1549 /**
1550  * Translate a Conv from higher_unsigned
1551  */
1552 static void lower_Conv_from_Ll(ir_node *node, lower_env_t *env)
1553 {
1554         ir_node      *op    = get_Conv_op(node);
1555         ir_mode      *omode = get_irn_mode(node);
1556         ir_node      *block = get_nodes_block(node);
1557         dbg_info     *dbg   = get_irn_dbg_info(node);
1558         unsigned      idx   = get_irn_idx(op);
1559         ir_graph     *irg   = get_irn_irg(node);
1560         node_entry_t *entry = env->entries[idx];
1561
1562         assert(idx < env->n_entries);
1563
1564         if (! entry->low_word) {
1565                 /* not ready yet, wait */
1566                 pdeq_putr(env->waitq, node);
1567                 return;
1568         }
1569
1570         if (mode_is_int(omode) || mode_is_reference(omode)) {
1571                 op = entry->low_word;
1572
1573                 /* simple case: create a high word */
1574                 if (omode != env->low_unsigned)
1575                         op = new_rd_Conv(dbg, block, op, omode);
1576
1577                 set_Conv_op(node, op);
1578         } else if (omode == mode_b) {
1579                 /* llu ? true : false  <=> (low|high) ? true : false */
1580                 ir_mode *mode = env->low_unsigned;
1581                 ir_node *or   = new_rd_Or(dbg, block, entry->low_word, entry->high_word,
1582                                           mode);
1583                 set_Conv_op(node, or);
1584         } else {
1585                 ir_node *irn, *call, *in[2];
1586                 ir_mode *imode = get_irn_mode(op);
1587                 ir_type *mtp   = get_conv_type(imode, omode, env);
1588
1589                 irn   = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1590                 in[0] = entry->low_word;
1591                 in[1] = entry->high_word;
1592
1593                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1594                 set_irn_pinned(call, get_irn_pinned(node));
1595                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1596
1597                 exchange(node, new_r_Proj(irn, omode, 0));
1598         }
1599 }
1600
1601 /**
1602  * Translate a Conv.
1603  */
1604 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env)
1605 {
1606         mode = get_irn_mode(node);
1607
1608         if (mode == env->high_signed
1609                         || mode == env->high_unsigned) {
1610                 lower_Conv_to_Ll(node, env);
1611         } else {
1612                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1613
1614                 if (mode == env->high_signed
1615                                 || mode == env->high_unsigned) {
1616                         lower_Conv_from_Ll(node, env);
1617                 }
1618         }
1619 }
1620
1621 /**
1622  * Lower the method type.
1623  *
1624  * @param mtp  the method type to lower
1625  * @param ent  the lower environment
1626  *
1627  * @return the lowered type
1628  */
1629 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env)
1630 {
1631         pmap_entry *entry;
1632         ident      *lid;
1633         ir_type    *res, *value_type;
1634
1635         if (is_lowered_type(mtp))
1636                 return mtp;
1637
1638         entry = pmap_find(lowered_type, mtp);
1639         if (! entry) {
1640                 int i, n, r, n_param, n_res;
1641
1642                 /* count new number of params */
1643                 n_param = n = get_method_n_params(mtp);
1644                 for (i = n_param - 1; i >= 0; --i) {
1645                         ir_type *tp = get_method_param_type(mtp, i);
1646
1647                         if (is_Primitive_type(tp)) {
1648                                 ir_mode *mode = get_type_mode(tp);
1649
1650                                 if (mode == env->high_signed ||
1651                                         mode == env->high_unsigned)
1652                                         ++n_param;
1653                         }
1654                 }
1655
1656                 /* count new number of results */
1657                 n_res = r = get_method_n_ress(mtp);
1658                 for (i = n_res - 1; i >= 0; --i) {
1659                         ir_type *tp = get_method_res_type(mtp, i);
1660
1661                         if (is_Primitive_type(tp)) {
1662                                 ir_mode *mode = get_type_mode(tp);
1663
1664                                 if (mode == env->high_signed ||
1665                                         mode == env->high_unsigned)
1666                                         ++n_res;
1667                         }
1668                 }
1669
1670                 res = new_type_method(n_param, n_res);
1671
1672                 /* set param types and result types */
1673                 for (i = n_param = 0; i < n; ++i) {
1674                         ir_type *tp = get_method_param_type(mtp, i);
1675
1676                         if (is_Primitive_type(tp)) {
1677                                 ir_mode *mode = get_type_mode(tp);
1678
1679                                 if (mode == env->high_signed) {
1680                                         set_method_param_type(res, n_param++, tp_u);
1681                                         set_method_param_type(res, n_param++, tp_s);
1682                                 } else if (mode == env->high_unsigned) {
1683                                         set_method_param_type(res, n_param++, tp_u);
1684                                         set_method_param_type(res, n_param++, tp_u);
1685                                 } else {
1686                                         set_method_param_type(res, n_param++, tp);
1687                                 }
1688                         } else {
1689                                 set_method_param_type(res, n_param++, tp);
1690                         }
1691                 }
1692                 for (i = n_res = 0; i < r; ++i) {
1693                         ir_type *tp = get_method_res_type(mtp, i);
1694
1695                         if (is_Primitive_type(tp)) {
1696                                 ir_mode *mode = get_type_mode(tp);
1697
1698                                 if (mode == env->high_signed) {
1699                                         set_method_res_type(res, n_res++, tp_u);
1700                                         set_method_res_type(res, n_res++, tp_s);
1701                                 } else if (mode == env->high_unsigned) {
1702                                         set_method_res_type(res, n_res++, tp_u);
1703                                         set_method_res_type(res, n_res++, tp_u);
1704                                 } else {
1705                                         set_method_res_type(res, n_res++, tp);
1706                                 }
1707                         } else {
1708                                 set_method_res_type(res, n_res++, tp);
1709                         }
1710                 }
1711                 set_lowered_type(mtp, res);
1712                 pmap_insert(lowered_type, mtp, res);
1713
1714                 value_type = get_method_value_param_type(mtp);
1715                 if (value_type != NULL) {
1716                         /* this creates a new value parameter type */
1717                         (void)get_method_value_param_ent(res, 0);
1718
1719                         /* set new param positions */
1720                         for (i = n_param = 0; i < n; ++i) {
1721                                 ir_type   *tp  = get_method_param_type(mtp, i);
1722                                 ident     *id  = get_method_param_ident(mtp, i);
1723                                 ir_entity *ent = get_method_value_param_ent(mtp, i);
1724
1725                                 set_entity_link(ent, INT_TO_PTR(n_param));
1726                                 if (is_Primitive_type(tp)) {
1727                                         ir_mode *mode = get_type_mode(tp);
1728
1729                                         if (mode == env->high_signed || mode == env->high_unsigned) {
1730                                                 if (id != NULL) {
1731                                                         lid = id_mangle(id, env->first_id);
1732                                                         set_method_param_ident(res, n_param, lid);
1733                                                         set_entity_ident(get_method_value_param_ent(res, n_param), lid);
1734                                                         lid = id_mangle(id, env->next_id);
1735                                                         set_method_param_ident(res, n_param + 1, lid);
1736                                                         set_entity_ident(get_method_value_param_ent(res, n_param + 1), lid);
1737                                                 }
1738                                                 n_param += 2;
1739                                                 continue;
1740                                         }
1741                                 }
1742                                 if (id != NULL) {
1743                                         set_method_param_ident(res, n_param, id);
1744                                         set_entity_ident(get_method_value_param_ent(res, n_param), id);
1745                                 }
1746                                 ++n_param;
1747                         }
1748
1749                         set_lowered_type(value_type, get_method_value_param_type(res));
1750                 }
1751         } else {
1752                 res = entry->value;
1753         }
1754         return res;
1755 }
1756
1757 /**
1758  * Translate a Return.
1759  */
1760 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env)
1761 {
1762         ir_graph  *irg = get_irn_irg(node);
1763         ir_entity *ent = get_irg_entity(irg);
1764         ir_type   *mtp = get_entity_type(ent);
1765         ir_node  **in;
1766         int        i, j, n;
1767         unsigned   idx;
1768         int        need_conv = 0;
1769         (void) mode;
1770
1771         /* check if this return must be lowered */
1772         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1773                 ir_node *pred = get_Return_res(node, i);
1774                 ir_mode *mode = get_irn_op_mode(pred);
1775
1776                 if (mode == env->high_signed ||
1777                         mode == env->high_unsigned) {
1778                         idx = get_irn_idx(pred);
1779                         if (! env->entries[idx]->low_word) {
1780                                 /* not ready yet, wait */
1781                                 pdeq_putr(env->waitq, node);
1782                                 return;
1783                         }
1784                         need_conv = 1;
1785                 }
1786         }
1787         if (! need_conv)
1788                 return;
1789
1790         ent = get_irg_entity(irg);
1791         mtp = get_entity_type(ent);
1792
1793         mtp = lower_mtp(mtp, env);
1794         set_entity_type(ent, mtp);
1795
1796         /* create a new in array */
1797         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1798         in[0] = get_Return_mem(node);
1799
1800         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1801                 ir_node *pred = get_Return_res(node, i);
1802
1803                 idx = get_irn_idx(pred);
1804                 assert(idx < env->n_entries);
1805
1806                 if (env->entries[idx]) {
1807                         in[++j] = env->entries[idx]->low_word;
1808                         in[++j] = env->entries[idx]->high_word;
1809                 } else {
1810                         in[++j] = pred;
1811                 }
1812         }
1813
1814         set_irn_in(node, j+1, in);
1815 }
1816
1817 /**
1818  * Translate the parameters.
1819  */
1820 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env)
1821 {
1822         ir_graph  *irg = get_irn_irg(node);
1823         ir_entity *ent = get_irg_entity(irg);
1824         ir_type   *tp  = get_entity_type(ent);
1825         ir_type   *mtp;
1826         long      *new_projs;
1827         int       i, j, n_params, rem;
1828         ir_node   *proj, *args;
1829         (void) mode;
1830
1831         if (is_lowered_type(tp)) {
1832                 mtp = get_associated_type(tp);
1833         } else {
1834                 mtp = tp;
1835         }
1836         assert(! is_lowered_type(mtp));
1837
1838         n_params = get_method_n_params(mtp);
1839         if (n_params <= 0)
1840                 return;
1841
1842         NEW_ARR_A(long, new_projs, n_params);
1843
1844         /* first check if we have parameters that must be fixed */
1845         for (i = j = 0; i < n_params; ++i, ++j) {
1846                 ir_type *tp = get_method_param_type(mtp, i);
1847
1848                 new_projs[i] = j;
1849                 if (is_Primitive_type(tp)) {
1850                         ir_mode *mode = get_type_mode(tp);
1851
1852                         if (mode == env->high_signed ||
1853                                 mode == env->high_unsigned)
1854                                 ++j;
1855                 }
1856         }
1857         if (i == j)
1858                 return;
1859
1860         mtp = lower_mtp(mtp, env);
1861         set_entity_type(ent, mtp);
1862
1863         /* switch off optimization for new Proj nodes or they might be CSE'ed
1864            with not patched one's */
1865         rem = get_optimize();
1866         set_optimize(0);
1867
1868         /* ok, fix all Proj's and create new ones */
1869         args = get_irg_args(irg);
1870         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1871                 ir_node *pred = get_Proj_pred(proj);
1872                 long proj_nr;
1873                 unsigned idx;
1874                 ir_mode *mode;
1875                 dbg_info *dbg;
1876
1877                 /* do not visit this node again */
1878                 mark_irn_visited(proj);
1879
1880                 if (pred != args)
1881                         continue;
1882
1883                 proj_nr = get_Proj_proj(proj);
1884                 set_Proj_proj(proj, new_projs[proj_nr]);
1885
1886                 idx = get_irn_idx(proj);
1887                 if (env->entries[idx]) {
1888                         ir_mode *low_mode = env->low_unsigned;
1889
1890                         mode = get_irn_mode(proj);
1891
1892                         if (mode == env->high_signed) {
1893                                 mode = env->low_signed;
1894                         } else {
1895                                 mode = env->low_unsigned;
1896                         }
1897
1898                         dbg = get_irn_dbg_info(proj);
1899                         env->entries[idx]->low_word  =
1900                                 new_rd_Proj(dbg, args, low_mode, new_projs[proj_nr]);
1901                         env->entries[idx]->high_word =
1902                                 new_rd_Proj(dbg, args, mode, new_projs[proj_nr] + 1);
1903                 }
1904         }
1905         set_optimize(rem);
1906 }
1907
1908 /**
1909  * Translate a Call.
1910  */
1911 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env)
1912 {
1913         ir_type  *tp = get_Call_type(node);
1914         ir_type  *call_tp;
1915         ir_node  **in, *proj, *results;
1916         int      n_params, n_res, need_lower = 0;
1917         int      i, j;
1918         long     *res_numbers = NULL;
1919         (void) mode;
1920
1921         if (is_lowered_type(tp)) {
1922                 call_tp = get_associated_type(tp);
1923         } else {
1924                 call_tp = tp;
1925         }
1926
1927         assert(! is_lowered_type(call_tp));
1928
1929         n_params = get_method_n_params(call_tp);
1930         for (i = 0; i < n_params; ++i) {
1931                 ir_type *tp = get_method_param_type(call_tp, i);
1932
1933                 if (is_Primitive_type(tp)) {
1934                         ir_mode *mode = get_type_mode(tp);
1935
1936                         if (mode == env->high_signed ||
1937                                 mode == env->high_unsigned) {
1938                                 need_lower = 1;
1939                                 break;
1940                         }
1941                 }
1942         }
1943         n_res = get_method_n_ress(call_tp);
1944         if (n_res > 0) {
1945                 NEW_ARR_A(long, res_numbers, n_res);
1946
1947                 for (i = j = 0; i < n_res; ++i, ++j) {
1948                         ir_type *tp = get_method_res_type(call_tp, i);
1949
1950                         res_numbers[i] = j;
1951                         if (is_Primitive_type(tp)) {
1952                                 ir_mode *mode = get_type_mode(tp);
1953
1954                                 if (mode == env->high_signed ||
1955                                         mode == env->high_unsigned) {
1956                                         need_lower = 1;
1957                                         ++j;
1958                                 }
1959                         }
1960                 }
1961         }
1962
1963         if (! need_lower)
1964                 return;
1965
1966         /* let's lower it */
1967         call_tp = lower_mtp(call_tp, env);
1968         set_Call_type(node, call_tp);
1969
1970         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1971
1972         in[0] = get_Call_mem(node);
1973         in[1] = get_Call_ptr(node);
1974
1975         for (j = 2, i = 0; i < n_params; ++i) {
1976                 ir_node *pred = get_Call_param(node, i);
1977                 unsigned idx = get_irn_idx(pred);
1978
1979                 if (env->entries[idx]) {
1980                         if (! env->entries[idx]->low_word) {
1981                                 /* not ready yet, wait */
1982                                 pdeq_putr(env->waitq, node);
1983                                 return;
1984                         }
1985                         in[j++] = env->entries[idx]->low_word;
1986                         in[j++] = env->entries[idx]->high_word;
1987                 } else {
1988                         in[j++] = pred;
1989                 }
1990         }
1991
1992         set_irn_in(node, j, in);
1993
1994         /* fix the results */
1995         results = NULL;
1996         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1997                 long proj_nr = get_Proj_proj(proj);
1998
1999                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
2000                         /* found the result proj */
2001                         results = proj;
2002                         break;
2003                 }
2004         }
2005
2006         if (results) {    /* there are results */
2007                 int rem = get_optimize();
2008
2009                 /* switch off optimization for new Proj nodes or they might be CSE'ed
2010                    with not patched one's */
2011                 set_optimize(0);
2012                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
2013                         if (get_Proj_pred(proj) == results) {
2014                                 long proj_nr = get_Proj_proj(proj);
2015                                 unsigned idx;
2016
2017                                 /* found a result */
2018                                 set_Proj_proj(proj, res_numbers[proj_nr]);
2019                                 idx = get_irn_idx(proj);
2020                                 if (env->entries[idx]) {
2021                                         ir_mode *mode = get_irn_mode(proj);
2022                                         ir_mode *low_mode = env->low_unsigned;
2023                                         dbg_info *dbg;
2024
2025                                         if (mode == env->high_signed) {
2026                                                 mode = env->low_signed;
2027                                         } else {
2028                                                 mode = env->low_unsigned;
2029                                         }
2030
2031                                         dbg = get_irn_dbg_info(proj);
2032                                         env->entries[idx]->low_word  =
2033                                                 new_rd_Proj(dbg, results, low_mode, res_numbers[proj_nr]);
2034                                         env->entries[idx]->high_word =
2035                                                 new_rd_Proj(dbg, results, mode, res_numbers[proj_nr] + 1);
2036                                 }
2037                                 mark_irn_visited(proj);
2038                         }
2039                 }
2040                 set_optimize(rem);
2041         }
2042 }
2043
2044 /**
2045  * Translate an Unknown into two.
2046  */
2047 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env)
2048 {
2049         unsigned  idx = get_irn_idx(node);
2050         ir_graph *irg = get_irn_irg(node);
2051         ir_mode  *low_mode = env->low_unsigned;
2052
2053         env->entries[idx]->low_word  = new_r_Unknown(irg, low_mode);
2054         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2055 }
2056
2057 /**
2058  * Translate a Phi.
2059  *
2060  * First step: just create two templates
2061  */
2062 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env)
2063 {
2064         ir_mode  *mode_l = env->low_unsigned;
2065         ir_graph *irg = get_irn_irg(phi);
2066         ir_node  *block, *unk_l, *unk_h, *phi_l, *phi_h;
2067         ir_node  **inl, **inh;
2068         dbg_info *dbg;
2069         unsigned  idx;
2070         int       i, arity = get_Phi_n_preds(phi);
2071         int       enq = 0;
2072
2073         idx = get_irn_idx(phi);
2074         if (env->entries[idx]->low_word) {
2075                 /* Phi nodes already build, check for inputs */
2076                 ir_node *phil = env->entries[idx]->low_word;
2077                 ir_node *phih = env->entries[idx]->high_word;
2078
2079                 for (i = 0; i < arity; ++i) {
2080                         ir_node *pred = get_Phi_pred(phi, i);
2081                         unsigned idx = get_irn_idx(pred);
2082
2083                         if (env->entries[idx]->low_word) {
2084                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2085                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2086                         } else {
2087                                 /* still not ready */
2088                                 pdeq_putr(env->waitq, phi);
2089                                 return;
2090                         }
2091                 }
2092         }
2093
2094         /* first create a new in array */
2095         NEW_ARR_A(ir_node *, inl, arity);
2096         NEW_ARR_A(ir_node *, inh, arity);
2097         unk_l = new_r_Dummy(irg, mode_l);
2098         unk_h = new_r_Dummy(irg, mode);
2099
2100         for (i = 0; i < arity; ++i) {
2101                 ir_node *pred = get_Phi_pred(phi, i);
2102                 unsigned idx  = get_irn_idx(pred);
2103
2104                 if (env->entries[idx]->low_word) {
2105                         inl[i] = env->entries[idx]->low_word;
2106                         inh[i] = env->entries[idx]->high_word;
2107                 } else {
2108                         inl[i] = unk_l;
2109                         inh[i] = unk_h;
2110                         enq = 1;
2111                 }
2112         }
2113
2114         dbg   = get_irn_dbg_info(phi);
2115         block = get_nodes_block(phi);
2116
2117         idx = get_irn_idx(phi);
2118         assert(idx < env->n_entries);
2119         env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, block, arity, inl, mode_l);
2120         env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, block, arity, inh, mode);
2121
2122         /* Don't forget to link the new Phi nodes into the block.
2123          * Beware that some Phis might be optimized away. */
2124         if (is_Phi(phi_l))
2125                 add_Block_phi(block, phi_l);
2126         if (is_Phi(phi_h))
2127                 add_Block_phi(block, phi_h);
2128
2129         if (enq) {
2130                 /* not yet finished */
2131                 pdeq_putr(env->waitq, phi);
2132         }
2133 }
2134
2135 /**
2136  * Translate a Mux.
2137  */
2138 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env)
2139 {
2140         ir_node  *block, *val;
2141         ir_node  *true_l, *true_h, *false_l, *false_h, *sel;
2142         dbg_info *dbg;
2143         unsigned  idx;
2144
2145         val = get_Mux_true(mux);
2146         idx = get_irn_idx(val);
2147         if (env->entries[idx]->low_word) {
2148                 /* Values already build */
2149                 true_l = env->entries[idx]->low_word;
2150                 true_h = env->entries[idx]->high_word;
2151         } else {
2152                 /* still not ready */
2153                 pdeq_putr(env->waitq, mux);
2154                 return;
2155         }
2156
2157         val = get_Mux_false(mux);
2158         idx = get_irn_idx(val);
2159         if (env->entries[idx]->low_word) {
2160                 /* Values already build */
2161                 false_l = env->entries[idx]->low_word;
2162                 false_h = env->entries[idx]->high_word;
2163         } else {
2164                 /* still not ready */
2165                 pdeq_putr(env->waitq, mux);
2166                 return;
2167         }
2168
2169
2170         sel = get_Mux_sel(mux);
2171
2172         dbg   = get_irn_dbg_info(mux);
2173         block = get_nodes_block(mux);
2174
2175         idx = get_irn_idx(mux);
2176         assert(idx < env->n_entries);
2177         env->entries[idx]->low_word  = new_rd_Mux(dbg, block, sel, false_l, true_l, env->low_unsigned);
2178         env->entries[idx]->high_word = new_rd_Mux(dbg, block, sel, false_h, true_h, mode);
2179 }
2180
2181 /**
2182  * Translate an ASM node.
2183  */
2184 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env)
2185 {
2186         ir_mode *his = env->high_signed;
2187         ir_mode *hiu = env->high_unsigned;
2188         int      i;
2189         ir_node *n;
2190
2191         (void)mode;
2192
2193         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2194                 ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
2195                 if (op_mode == his || op_mode == hiu) {
2196                         panic("lowering ASM unimplemented");
2197                 }
2198         }
2199
2200         for (n = asmn;;) {
2201                 ir_mode *proj_mode;
2202
2203                 n = get_irn_link(n);
2204                 if (n == NULL)
2205                         break;
2206
2207                 proj_mode = get_irn_mode(n);
2208                 if (proj_mode == his || proj_mode == hiu) {
2209                         panic("lowering ASM unimplemented");
2210                 }
2211         }
2212 }
2213
2214 /**
2215  * Translate a Sel node.
2216  */
2217 static void lower_Sel(ir_node *sel, ir_mode *mode, lower_env_t *env)
2218 {
2219         (void) mode;
2220
2221         /* we must only lower value parameter Sels if we change the
2222            value parameter type. */
2223         if (env->value_param_tp != NULL) {
2224                 ir_entity *ent = get_Sel_entity(sel);
2225             if (get_entity_owner(ent) == env->value_param_tp) {
2226                         int pos = PTR_TO_INT(get_entity_link(ent));
2227
2228                         ent = get_method_value_param_ent(env->l_mtp, pos);
2229                         set_Sel_entity(sel, ent);
2230                 }
2231         }
2232 }
2233
2234 /**
2235  * check for opcodes that must always be lowered.
2236  */
2237 static int always_lower(ir_opcode code)
2238 {
2239         switch (code) {
2240         case iro_ASM:
2241         case iro_Proj:
2242         case iro_Start:
2243         case iro_Call:
2244         case iro_Return:
2245         case iro_Cond:
2246         case iro_Conv:
2247         case iro_Sel:
2248                 return 1;
2249         default:
2250                 return 0;
2251         }
2252 }
2253
2254 /**
2255  * lower boolean Proj(Cmp)
2256  */
2257 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env)
2258 {
2259         unsigned  lidx;
2260         unsigned  ridx;
2261         ir_node  *l, *r, *low, *high, *t, *res;
2262         pn_Cmp   pnc;
2263         ir_node  *blk;
2264         dbg_info *db;
2265
2266         l    = get_Cmp_left(cmp);
2267         lidx = get_irn_idx(l);
2268         if (! env->entries[lidx]->low_word) {
2269                 /* still not ready */
2270                 return NULL;
2271         }
2272
2273         r    = get_Cmp_right(cmp);
2274         ridx = get_irn_idx(r);
2275         if (! env->entries[ridx]->low_word) {
2276                 /* still not ready */
2277                 return NULL;
2278         }
2279
2280         pnc  = get_Proj_proj(proj);
2281         blk  = get_nodes_block(cmp);
2282         db   = get_irn_dbg_info(cmp);
2283         low  = new_rd_Cmp(db, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2284         high = new_rd_Cmp(db, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2285
2286         if (pnc == pn_Cmp_Eq) {
2287                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2288                 res = new_rd_And(db, blk,
2289                         new_r_Proj(low, mode_b, pnc),
2290                         new_r_Proj(high, mode_b, pnc),
2291                         mode_b);
2292         } else if (pnc == pn_Cmp_Lg) {
2293                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2294                 res = new_rd_Or(db, blk,
2295                         new_r_Proj(low, mode_b, pnc),
2296                         new_r_Proj(high, mode_b, pnc),
2297                         mode_b);
2298         } else {
2299                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2300                 t = new_rd_And(db, blk,
2301                         new_r_Proj(low, mode_b, pnc),
2302                         new_r_Proj(high, mode_b, pn_Cmp_Eq),
2303                         mode_b);
2304                 res = new_rd_Or(db, blk,
2305                         new_r_Proj(high, mode_b, pnc & ~pn_Cmp_Eq),
2306                         t,
2307                         mode_b);
2308         }
2309         return res;
2310 }
2311
2312 /**
2313  * The type of a lower function.
2314  *
2315  * @param node   the node to be lowered
2316  * @param mode   the low mode for the destination node
2317  * @param env    the lower environment
2318  */
2319 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2320
2321 /**
2322  * Lower a node.
2323  */
2324 static void lower_ops(ir_node *node, void *env)
2325 {
2326         lower_env_t  *lenv = env;
2327         node_entry_t *entry;
2328         unsigned      idx = get_irn_idx(node);
2329         ir_mode      *mode = get_irn_mode(node);
2330
2331         if (mode == mode_b || is_Mux(node) || is_Conv(node)) {
2332                 int i;
2333
2334                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2335                         ir_node *proj = get_irn_n(node, i);
2336
2337                         if (is_Proj(proj)) {
2338                                 ir_node *cmp = get_Proj_pred(proj);
2339
2340                                 if (is_Cmp(cmp)) {
2341                                         ir_node *arg = get_Cmp_left(cmp);
2342
2343                                         mode = get_irn_mode(arg);
2344                                         if (mode == lenv->high_signed ||
2345                                                 mode == lenv->high_unsigned) {
2346                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2347
2348                                                 if (res == NULL) {
2349                                                         /* could not lower because predecessors not ready */
2350                                                         waitq_put(lenv->waitq, node);
2351                                                         return;
2352                                                 }
2353                                                 set_irn_n(node, i, res);
2354                                         }
2355                                 }
2356                         }
2357                 }
2358         }
2359
2360         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2361         if (entry || always_lower(get_irn_opcode(node))) {
2362                 ir_op      *op = get_irn_op(node);
2363                 lower_func func = (lower_func)op->ops.generic;
2364
2365                 if (func) {
2366                         mode = get_irn_op_mode(node);
2367
2368                         if (mode == lenv->high_signed)
2369                                 mode = lenv->low_signed;
2370                         else
2371                                 mode = lenv->low_unsigned;
2372
2373                         DB((dbg, LEVEL_1, "  %+F\n", node));
2374                         func(node, mode, lenv);
2375                 }
2376         }
2377 }
2378
2379 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2380
2381 /**
2382  * Compare two op_mode_entry_t's.
2383  */
2384 static int cmp_op_mode(const void *elt, const void *key, size_t size)
2385 {
2386         const op_mode_entry_t *e1 = elt;
2387         const op_mode_entry_t *e2 = key;
2388         (void) size;
2389
2390         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2391 }
2392
2393 /**
2394  * Compare two conv_tp_entry_t's.
2395  */
2396 static int cmp_conv_tp(const void *elt, const void *key, size_t size)
2397 {
2398         const conv_tp_entry_t *e1 = elt;
2399         const conv_tp_entry_t *e2 = key;
2400         (void) size;
2401
2402         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2403 }
2404
2405 /**
2406  * Enter a lowering function into an ir_op.
2407  */
2408 static void enter_lower_func(ir_op *op, lower_func func)
2409 {
2410         op->ops.generic = (op_func)func;
2411 }
2412
2413 /**
2414  * Returns non-zero if a method type must be lowered.
2415  *
2416  * @param mtp  the method type
2417  */
2418 static int mtp_must_be_lowered(ir_type *mtp, lower_env_t *env)
2419 {
2420         int i, n_params;
2421
2422         n_params = get_method_n_params(mtp);
2423         if (n_params <= 0)
2424                 return 0;
2425
2426         /* first check if we have parameters that must be fixed */
2427         for (i = 0; i < n_params; ++i) {
2428                 ir_type *tp = get_method_param_type(mtp, i);
2429
2430                 if (is_Primitive_type(tp)) {
2431                         ir_mode *mode = get_type_mode(tp);
2432
2433                         if (mode == env->high_signed ||
2434                                 mode == env->high_unsigned)
2435                                 return 1;
2436                 }
2437         }
2438         return 0;
2439 }
2440
2441 static void setup_modes(lower_env_t *env)
2442 {
2443         unsigned           size_bits           = env->params->doubleword_size;
2444         ir_mode           *doubleword_signed   = NULL;
2445         ir_mode           *doubleword_unsigned = NULL;
2446         int                n_modes             = get_irp_n_modes();
2447         ir_mode_arithmetic arithmetic;
2448         unsigned           modulo_shift;
2449         int                i;
2450
2451         /* search for doubleword modes... */
2452         for (i = 0; i < n_modes; ++i) {
2453                 ir_mode *mode = get_irp_mode(i);
2454                 if (!mode_is_int(mode))
2455                         continue;
2456                 if (get_mode_size_bits(mode) != size_bits)
2457                         continue;
2458                 if (mode_is_signed(mode)) {
2459                         if (doubleword_signed != NULL) {
2460                                 /* sigh - the lowerer should really just lower all mode with
2461                                  * size_bits it finds. Unfortunately this required a bigger
2462                                  * rewrite. */
2463                                 panic("multiple double word signed modes found");
2464                         }
2465                         doubleword_signed = mode;
2466                 } else {
2467                         if (doubleword_unsigned != NULL) {
2468                                 /* sigh - the lowerer should really just lower all mode with
2469                                  * size_bits it finds. Unfortunately this required a bigger
2470                                  * rewrite. */
2471                                 panic("multiple double word unsigned modes found");
2472                         }
2473                         doubleword_unsigned = mode;
2474                 }
2475         }
2476         if (doubleword_signed == NULL || doubleword_unsigned == NULL) {
2477                 panic("Couldn't find doubleword modes");
2478         }
2479
2480         arithmetic   = get_mode_arithmetic(doubleword_signed);
2481         modulo_shift = get_mode_modulo_shift(doubleword_signed);
2482
2483         assert(get_mode_size_bits(doubleword_unsigned) == size_bits);
2484         assert(size_bits % 2 == 0);
2485         assert(get_mode_sign(doubleword_signed) == 1);
2486         assert(get_mode_sign(doubleword_unsigned) == 0);
2487         assert(get_mode_sort(doubleword_signed) == irms_int_number);
2488         assert(get_mode_sort(doubleword_unsigned) == irms_int_number);
2489         assert(get_mode_arithmetic(doubleword_unsigned) == arithmetic);
2490         assert(get_mode_modulo_shift(doubleword_unsigned) == modulo_shift);
2491
2492         /* try to guess a sensible modulo shift for the new mode.
2493          * (This is IMO another indication that this should really be a node
2494          *  attribute instead of a mode thing) */
2495         if (modulo_shift == size_bits) {
2496                 modulo_shift = modulo_shift / 2;
2497         } else if (modulo_shift == 0) {
2498                 /* fine */
2499         } else {
2500                 panic("Don't know what new modulo shift to use for lowered doubleword mode");
2501         }
2502         size_bits /= 2;
2503
2504         /* produce lowered modes */
2505         env->high_signed   = doubleword_signed;
2506         env->high_unsigned = doubleword_unsigned;
2507         env->low_signed    = new_ir_mode("WS", irms_int_number, size_bits, 1,
2508                                          arithmetic, modulo_shift);
2509         env->low_unsigned  = new_ir_mode("WU", irms_int_number, size_bits, 0,
2510                                          arithmetic, modulo_shift);
2511 }
2512
2513 /*
2514  * Do the lowering.
2515  */
2516 void lower_dw_ops(const lwrdw_param_t *param)
2517 {
2518         lower_env_t lenv;
2519         int         i;
2520
2521         if (! param)
2522                 return;
2523
2524         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2525
2526         memset(&lenv, 0, sizeof(lenv));
2527         lenv.params = param;
2528         setup_modes(&lenv);
2529
2530         /* create the necessary maps */
2531         if (! intrinsic_fkt)
2532                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2533         if (! conv_types)
2534                 conv_types = new_set(cmp_conv_tp, 16);
2535         if (! lowered_type)
2536                 lowered_type = pmap_create();
2537
2538         /* create a primitive unsigned and signed type */
2539         if (! tp_u)
2540                 tp_u = get_type_for_mode(lenv.low_unsigned);
2541         if (! tp_s)
2542                 tp_s = get_type_for_mode(lenv.low_signed);
2543
2544         /* create method types for the created binop calls */
2545         if (! binop_tp_u) {
2546                 binop_tp_u = new_type_method(4, 2);
2547                 set_method_param_type(binop_tp_u, 0, tp_u);
2548                 set_method_param_type(binop_tp_u, 1, tp_u);
2549                 set_method_param_type(binop_tp_u, 2, tp_u);
2550                 set_method_param_type(binop_tp_u, 3, tp_u);
2551                 set_method_res_type(binop_tp_u, 0, tp_u);
2552                 set_method_res_type(binop_tp_u, 1, tp_u);
2553         }
2554         if (! binop_tp_s) {
2555                 binop_tp_s = new_type_method(4, 2);
2556                 set_method_param_type(binop_tp_s, 0, tp_u);
2557                 set_method_param_type(binop_tp_s, 1, tp_s);
2558                 set_method_param_type(binop_tp_s, 2, tp_u);
2559                 set_method_param_type(binop_tp_s, 3, tp_s);
2560                 set_method_res_type(binop_tp_s, 0, tp_u);
2561                 set_method_res_type(binop_tp_s, 1, tp_s);
2562         }
2563         if (! shiftop_tp_u) {
2564                 shiftop_tp_u = new_type_method(3, 2);
2565                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2566                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2567                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2568                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2569                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2570         }
2571         if (! shiftop_tp_s) {
2572                 shiftop_tp_s = new_type_method(3, 2);
2573                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2574                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2575                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2576                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2577                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2578         }
2579         if (! unop_tp_u) {
2580                 unop_tp_u = new_type_method(2, 2);
2581                 set_method_param_type(unop_tp_u, 0, tp_u);
2582                 set_method_param_type(unop_tp_u, 1, tp_u);
2583                 set_method_res_type(unop_tp_u, 0, tp_u);
2584                 set_method_res_type(unop_tp_u, 1, tp_u);
2585         }
2586         if (! unop_tp_s) {
2587                 unop_tp_s = new_type_method(2, 2);
2588                 set_method_param_type(unop_tp_s, 0, tp_u);
2589                 set_method_param_type(unop_tp_s, 1, tp_s);
2590                 set_method_res_type(unop_tp_s, 0, tp_u);
2591                 set_method_res_type(unop_tp_s, 1, tp_s);
2592         }
2593
2594         lenv.tv_mode_bytes = new_tarval_from_long(param->doubleword_size/(2*8), lenv.low_unsigned);
2595         lenv.tv_mode_bits  = new_tarval_from_long(param->doubleword_size/2, lenv.low_unsigned);
2596         lenv.waitq         = new_pdeq();
2597         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
2598         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
2599
2600         clear_irp_opcodes_generic_func();
2601         enter_lower_func(op_Add,     lower_Binop);
2602         enter_lower_func(op_And,     lower_And);
2603         enter_lower_func(op_ASM,     lower_ASM);
2604         enter_lower_func(op_Call,    lower_Call);
2605         enter_lower_func(op_Cond,    lower_Cond);
2606         enter_lower_func(op_Const,   lower_Const);
2607         enter_lower_func(op_Conv,    lower_Conv);
2608         enter_lower_func(op_Div,     lower_Div);
2609         enter_lower_func(op_DivMod,  lower_DivMod);
2610         enter_lower_func(op_Eor,     lower_Eor);
2611         enter_lower_func(op_Load,    lower_Load);
2612         enter_lower_func(op_Minus,   lower_Unop);
2613         enter_lower_func(op_Mod,     lower_Mod);
2614         enter_lower_func(op_Mul,     lower_Binop);
2615         enter_lower_func(op_Mux,     lower_Mux);
2616         enter_lower_func(op_Not,     lower_Not);
2617         enter_lower_func(op_Or,      lower_Or);
2618         enter_lower_func(op_Phi,     lower_Phi);
2619         enter_lower_func(op_Return,  lower_Return);
2620         enter_lower_func(op_Rotl,    lower_Rotl);
2621         enter_lower_func(op_Sel,     lower_Sel);
2622         enter_lower_func(op_Shl,     lower_Shl);
2623         enter_lower_func(op_Shr,     lower_Shr);
2624         enter_lower_func(op_Shrs,    lower_Shrs);
2625         enter_lower_func(op_Start,   lower_Start);
2626         enter_lower_func(op_Store,   lower_Store);
2627         enter_lower_func(op_Sub,     lower_Binop);
2628         enter_lower_func(op_Unknown, lower_Unknown);
2629
2630         /* transform all graphs */
2631         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2632                 ir_graph  *irg = get_irp_irg(i);
2633                 ir_entity *ent;
2634                 ir_type   *mtp;
2635                 unsigned n_idx;
2636
2637                 obstack_init(&lenv.obst);
2638
2639                 n_idx = get_irg_last_idx(irg);
2640                 n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2641                 lenv.n_entries = n_idx;
2642                 lenv.entries   = NEW_ARR_F(node_entry_t *, n_idx);
2643                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2644
2645                 lenv.irg          = irg;
2646                 lenv.l_mtp        = NULL;
2647                 lenv.flags        = 0;
2648                 lenv.proj_2_block = pmap_create();
2649                 lenv.value_param_tp = NULL;
2650                 ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2651
2652                 ent = get_irg_entity(irg);
2653                 mtp = get_entity_type(ent);
2654
2655                 if (mtp_must_be_lowered(mtp, &lenv)) {
2656                         ir_type *ltp = lower_mtp(mtp, &lenv);
2657                         lenv.flags |= MUST_BE_LOWERED;
2658                         set_entity_type(ent, ltp);
2659                         lenv.l_mtp = ltp;
2660                         lenv.value_param_tp = get_method_value_param_type(mtp);
2661                 }
2662
2663                 /* first step: link all nodes and allocate data */
2664                 irg_walk_graph(irg, firm_clear_node_and_phi_links, prepare_links_and_handle_rotl, &lenv);
2665
2666                 if (lenv.flags & MUST_BE_LOWERED) {
2667                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2668
2669                         /* must do some work */
2670                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2671
2672                         /* last step: all waiting nodes */
2673                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2674                         while (! pdeq_empty(lenv.waitq)) {
2675                                 ir_node *node = pdeq_getl(lenv.waitq);
2676
2677                                 lower_ops(node, &lenv);
2678                         }
2679
2680                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2681
2682                         /* outs are invalid, we changed the graph */
2683                         set_irg_outs_inconsistent(irg);
2684
2685                         if (lenv.flags & CF_CHANGED) {
2686                                 /* control flow changed, dominance info is invalid */
2687                                 set_irg_doms_inconsistent(irg);
2688                                 set_irg_extblk_inconsistent(irg);
2689                                 set_irg_loopinfo_inconsistent(irg);
2690                         }
2691                 } else {
2692                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2693                 }
2694                 pmap_destroy(lenv.proj_2_block);
2695                 DEL_ARR_F(lenv.entries);
2696                 obstack_free(&lenv.obst, NULL);
2697         }
2698         del_pdeq(lenv.waitq);
2699 }
2700
2701 /* Default implementation. */
2702 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2703                                     const ir_mode *imode, const ir_mode *omode,
2704                                     void *context)
2705 {
2706         char buf[64];
2707         ident *id;
2708         ir_entity *ent;
2709         (void) context;
2710
2711         if (imode == omode) {
2712                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2713         } else {
2714                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2715                         get_mode_name(imode), get_mode_name(omode));
2716         }
2717         id = new_id_from_str(buf);
2718
2719         ent = new_entity(get_glob_type(), id, method);
2720         set_entity_ld_ident(ent, get_entity_ident(ent));
2721         return ent;
2722 }