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 mode to a primitive type. */
  58 static pmap *prim_types;
  59
  60 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  61 static set *intrinsic_fkt;
  62
  63 /** A map from (imode, omode) to conv function types. */
  64 static set *conv_types;
  65
  66 /** A map from a method type to its lowered type. */
  67 static pmap *lowered_type;
  68
  69 /** The types for the binop and unop intrinsics. */
  70 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;
  71
  72 /** the debug handle */
  73 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  74
  75 /**
  76  * An entry in the (op, imode, omode) -> entity map.
  77  */
  78 typedef struct _op_mode_entry {
  79         const ir_op   *op;    /**< the op */
  80         const ir_mode *imode; /**< the input mode */
  81         const ir_mode *omode; /**< the output mode */
  82         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  83 } op_mode_entry_t;
  84
  85 /**
  86  * An entry in the (imode, omode) -> tp map.
  87  */
  88 typedef struct _conv_tp_entry {
  89         const ir_mode *imode; /**< the input mode */
  90         const ir_mode *omode; /**< the output mode */
  91         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
  92 } conv_tp_entry_t;
  93
  94 /**
  95  * Every double word node will be replaced,
  96  * we need some store to hold the replacement:
  97  */
  98 typedef struct _node_entry_t {
  99         ir_node *low_word;    /**< the low word */
 100         ir_node *high_word;   /**< the high word */
 101 } node_entry_t;
 102
 103 enum lower_flags {
 104         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 105         CF_CHANGED      = 2,  /**< control flow was changed */
 106 };
 107
 108 /**
 109  * The lower environment.
 110  */
 111 typedef struct _lower_env_t {
 112         node_entry_t **entries;       /**< entries per node */
 113         struct obstack obst;          /**< an obstack holding the temporary data */
 114         ir_type  *l_mtp;              /**< lowered method type of the current method */
 115         tarval   *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 116         tarval   *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 117         pdeq     *waitq;              /**< a wait queue of all nodes that must be handled later */
 118         pmap     *proj_2_block;       /**< a map from ProjX to its destination blocks */
 119         ident    *first_id;           /**< .l for little and .h for big endian */
 120         ident    *next_id;            /**< .h for little and .l for big endian */
 121         const lwrdw_param_t *params;  /**< transformation parameter */
 122         unsigned flags;               /**< some flags */
 123         int      n_entries;           /**< number of entries */
 124         ir_type  *value_param_tp;     /**< the old value param type */
 125 } lower_env_t;
 126
 127 /**
 128  * Get a primitive mode for a mode.
 129  */
 130 static ir_type *get_primitive_type(ir_mode *mode)
 131 {
 132         pmap_entry *entry = pmap_find(prim_types, mode);
 133         ir_type *tp;
 134         char buf[64];
 135
 136         if (entry)
 137                 return entry->value;
 138
 139         snprintf(buf, sizeof(buf), "_prim_%s", get_mode_name(mode));
 140         tp = new_type_primitive(mode);
 141
 142         pmap_insert(prim_types, mode, tp);
 143         return tp;
 144 }  /* get_primitive_type */
 145
 146 /**
 147  * Create a method type for a Conv emulation from imode to omode.
 148  */
 149 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env)
 150 {
 151         conv_tp_entry_t key, *entry;
 152         ir_type *mtd;
 153
 154         key.imode = imode;
 155         key.omode = omode;
 156         key.mtd   = NULL;
 157
 158         entry = set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 159         if (! entry->mtd) {
 160                 int n_param = 1, n_res = 1;
 161
 162                 if (imode == env->params->high_signed || imode == env->params->high_unsigned)
 163                         n_param = 2;
 164                 if (omode == env->params->high_signed || omode == env->params->high_unsigned)
 165                         n_res = 2;
 166
 167                 /* create a new one */
 168                 mtd = new_type_method(n_param, n_res);
 169
 170                 /* set param types and result types */
 171                 n_param = 0;
 172                 if (imode == env->params->high_signed) {
 173                         set_method_param_type(mtd, n_param++, tp_u);
 174                         set_method_param_type(mtd, n_param++, tp_s);
 175                 } else if (imode == env->params->high_unsigned) {
 176                         set_method_param_type(mtd, n_param++, tp_u);
 177                         set_method_param_type(mtd, n_param++, tp_u);
 178                 } else {
 179                         ir_type *tp = get_primitive_type(imode);
 180                         set_method_param_type(mtd, n_param++, tp);
 181                 }  /* if */
 182
 183                 n_res = 0;
 184                 if (omode == env->params->high_signed) {
 185                         set_method_res_type(mtd, n_res++, tp_u);
 186                         set_method_res_type(mtd, n_res++, tp_s);
 187                 } else if (omode == env->params->high_unsigned) {
 188                         set_method_res_type(mtd, n_res++, tp_u);
 189                         set_method_res_type(mtd, n_res++, tp_u);
 190                 } else {
 191                         ir_type *tp = get_primitive_type(omode);
 192                         set_method_res_type(mtd, n_res++, tp);
 193                 }  /* if */
 194                 entry->mtd = mtd;
 195         } else {
 196                 mtd = entry->mtd;
 197         }  /* if */
 198         return mtd;
 199 }  /* get_conv_type */
 200
 201 /**
 202  * Add an additional control flow input to a block.
 203  * Patch all Phi nodes. The new Phi inputs are copied from
 204  * old input number nr.
 205  */
 206 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 207 {
 208         int i, arity = get_irn_arity(block);
 209         ir_node **in, *phi;
 210
 211         assert(nr < arity);
 212
 213         NEW_ARR_A(ir_node *, in, arity + 1);
 214         for (i = 0; i < arity; ++i)
 215                 in[i] = get_irn_n(block, i);
 216         in[i] = cf;
 217
 218         set_irn_in(block, i + 1, in);
 219
 220         for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
 221                 for (i = 0; i < arity; ++i)
 222                         in[i] = get_irn_n(phi, i);
 223                 in[i] = in[nr];
 224                 set_irn_in(phi, i + 1, in);
 225         }  /* for */
 226 }  /* add_block_cf_input_nr */
 227
 228 /**
 229  * Add an additional control flow input to a block.
 230  * Patch all Phi nodes. The new Phi inputs are copied from
 231  * old input from cf tmpl.
 232  */
 233 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 234 {
 235         int i, arity = get_irn_arity(block);
 236         int nr = 0;
 237
 238         for (i = 0; i < arity; ++i) {
 239                 if (get_irn_n(block, i) == tmpl) {
 240                         nr = i;
 241                         break;
 242                 }  /* if */
 243         }  /* for */
 244         assert(i < arity);
 245         add_block_cf_input_nr(block, nr, cf);
 246 }  /* add_block_cf_input */
 247
 248 /**
 249  * Return the "operational" mode of a Firm node.
 250  */
 251 static ir_mode *get_irn_op_mode(ir_node *node)
 252 {
 253         switch (get_irn_opcode(node)) {
 254         case iro_Load:
 255                 return get_Load_mode(node);
 256         case iro_Store:
 257                 return get_irn_mode(get_Store_value(node));
 258         case iro_DivMod:
 259                 return get_irn_mode(get_DivMod_left(node));
 260         case iro_Div:
 261                 return get_irn_mode(get_Div_left(node));
 262         case iro_Mod:
 263                 return get_irn_mode(get_Mod_left(node));
 264         case iro_Cmp:
 265                 return get_irn_mode(get_Cmp_left(node));
 266         default:
 267                 return get_irn_mode(node);
 268         }  /* switch */
 269 }  /* get_irn_op_mode */
 270
 271 /**
 272  * Walker, prepare the node links.
 273  */
 274 static void prepare_links(ir_node *node, void *env)
 275 {
 276         lower_env_t  *lenv = env;
 277         ir_mode      *mode = get_irn_op_mode(node);
 278         node_entry_t *link;
 279         int          i, idx;
 280
 281         if (mode == lenv->params->high_signed ||
 282                 mode == lenv->params->high_unsigned) {
 283                 /* ok, found a node that will be lowered */
 284                 link = OALLOCZ(&lenv->obst, node_entry_t);
 285
 286                 idx = get_irn_idx(node);
 287                 if (idx >= lenv->n_entries) {
 288                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 289                         int old = lenv->n_entries;
 290                         int n_idx = idx + (idx >> 3);
 291
 292                         ARR_RESIZE(node_entry_t *, lenv->entries, n_idx);
 293                         memset(&lenv->entries[old], 0, (n_idx - old) * sizeof(lenv->entries[0]));
 294                         lenv->n_entries = n_idx;
 295                 }
 296                 lenv->entries[idx] = link;
 297                 lenv->flags |= MUST_BE_LOWERED;
 298         } else if (is_Conv(node)) {
 299                 /* Conv nodes have two modes */
 300                 ir_node *pred = get_Conv_op(node);
 301                 mode = get_irn_mode(pred);
 302
 303                 if (mode == lenv->params->high_signed ||
 304                         mode == lenv->params->high_unsigned) {
 305                         /* must lower this node either but don't need a link */
 306                         lenv->flags |= MUST_BE_LOWERED;
 307                 }  /* if */
 308                 return;
 309         }  /* if */
 310
 311         if (is_Proj(node)) {
 312                 /* link all Proj nodes to its predecessor:
 313                    Note that Tuple Proj's and its Projs are linked either. */
 314                 ir_node *pred = get_Proj_pred(node);
 315
 316                 set_irn_link(node, get_irn_link(pred));
 317                 set_irn_link(pred, node);
 318         } else if (is_Phi(node)) {
 319                 /* link all Phi nodes to its block */
 320                 ir_node *block = get_nodes_block(node);
 321                 add_Block_phi(block, node);
 322         } else if (is_Block(node)) {
 323                 /* fill the Proj -> Block map */
 324                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 325                         ir_node *pred = get_Block_cfgpred(node, i);
 326
 327                         if (is_Proj(pred))
 328                                 pmap_insert(lenv->proj_2_block, pred, node);
 329                 }  /* for */
 330         }  /* if */
 331 }  /* prepare_links */
 332
 333 /**
 334  * Translate a Constant: create two.
 335  */
 336 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env)
 337 {
 338         tarval   *tv, *tv_l, *tv_h;
 339         ir_node  *low, *high;
 340         dbg_info *dbg = get_irn_dbg_info(node);
 341         int      idx;
 342         ir_graph *irg = current_ir_graph;
 343         ir_mode  *low_mode = env->params->low_unsigned;
 344
 345         tv   = get_Const_tarval(node);
 346
 347         tv_l = tarval_convert_to(tv, low_mode);
 348         low  = new_rd_Const(dbg, irg, tv_l);
 349
 350         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 351         high = new_rd_Const(dbg, irg, tv_h);
 352
 353         idx = get_irn_idx(node);
 354         assert(idx < env->n_entries);
 355         env->entries[idx]->low_word  = low;
 356         env->entries[idx]->high_word = high;
 357 }  /* lower_Const */
 358
 359 /**
 360  * Translate a Load: create two.
 361  */
 362 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env)
 363 {
 364         ir_mode    *low_mode = env->params->low_unsigned;
 365         ir_graph   *irg = current_ir_graph;
 366         ir_node    *adr = get_Load_ptr(node);
 367         ir_node    *mem = get_Load_mem(node);
 368         ir_node    *low, *high, *proj;
 369         dbg_info   *dbg;
 370         ir_node    *block = get_nodes_block(node);
 371         int         idx;
 372         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 373                                  ? cons_volatile : 0;
 374
 375         if (env->params->little_endian) {
 376                 low  = adr;
 377                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 378         } else {
 379                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 380                 high = adr;
 381         }  /* if */
 382
 383         /* create two loads */
 384         dbg  = get_irn_dbg_info(node);
 385         low  = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 386         proj = new_r_Proj(block, low, mode_M, pn_Load_M);
 387         high = new_rd_Load(dbg, block, proj, high, mode, volatility);
 388
 389         idx = get_irn_idx(node);
 390         assert(idx < env->n_entries);
 391         env->entries[idx]->low_word  = low;
 392         env->entries[idx]->high_word = high;
 393
 394         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 395                 idx = get_irn_idx(proj);
 396
 397                 switch (get_Proj_proj(proj)) {
 398                 case pn_Load_M:         /* Memory result. */
 399                         /* put it to the second one */
 400                         set_Proj_pred(proj, high);
 401                         break;
 402                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 403                         /* put it to the first one */
 404                         set_Proj_pred(proj, low);
 405                         break;
 406                 case pn_Load_res:       /* Result of load operation. */
 407                         assert(idx < env->n_entries);
 408                         env->entries[idx]->low_word  = new_r_Proj(block, low,  low_mode, pn_Load_res);
 409                         env->entries[idx]->high_word = new_r_Proj(block, high, mode,     pn_Load_res);
 410                         break;
 411                 default:
 412                         assert(0 && "unexpected Proj number");
 413                 }  /* switch */
 414                 /* mark this proj: we have handled it already, otherwise we might fall into
 415                  * out new nodes. */
 416                 mark_irn_visited(proj);
 417         }  /* for */
 418 }  /* lower_Load */
 419
 420 /**
 421  * Translate a Store: create two.
 422  */
 423 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env)
 424 {
 425         ir_graph     *irg;
 426         ir_node      *block, *adr, *mem;
 427         ir_node      *low, *high, *irn, *proj;
 428         dbg_info     *dbg;
 429         int           idx;
 430         node_entry_t *entry;
 431         ir_cons_flags    volatility = get_Store_volatility(node) == volatility_is_volatile
 432                                    ? cons_volatile : 0;
 433         (void) mode;
 434
 435         irn = get_Store_value(node);
 436         entry = env->entries[get_irn_idx(irn)];
 437         assert(entry);
 438
 439         if (! entry->low_word) {
 440                 /* not ready yet, wait */
 441                 pdeq_putr(env->waitq, node);
 442                 return;
 443         }  /* if */
 444
 445         irg = current_ir_graph;
 446         adr = get_Store_ptr(node);
 447         mem = get_Store_mem(node);
 448         block = get_nodes_block(node);
 449
 450         if (env->params->little_endian) {
 451                 low  = adr;
 452                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 453         } else {
 454                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 455                 high = adr;
 456         }  /* if */
 457
 458         /* create two Stores */
 459         dbg = get_irn_dbg_info(node);
 460         low  = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 461         proj = new_r_Proj(block, low, mode_M, pn_Store_M);
 462         high = new_rd_Store(dbg, block, proj, high, entry->high_word, volatility);
 463
 464         idx = get_irn_idx(node);
 465         assert(idx < env->n_entries);
 466         env->entries[idx]->low_word  = low;
 467         env->entries[idx]->high_word = high;
 468
 469         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 470                 idx = get_irn_idx(proj);
 471
 472                 switch (get_Proj_proj(proj)) {
 473                 case pn_Store_M:         /* Memory result. */
 474                         /* put it to the second one */
 475                         set_Proj_pred(proj, high);
 476                         break;
 477                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 478                         /* put it to the first one */
 479                         set_Proj_pred(proj, low);
 480                         break;
 481                 default:
 482                         assert(0 && "unexpected Proj number");
 483                 }  /* switch */
 484                 /* mark this proj: we have handled it already, otherwise we might fall into
 485                  * out new nodes. */
 486                 mark_irn_visited(proj);
 487         }  /* for */
 488 }  /* lower_Store */
 489
 490 /**
 491  * Return a node containing the address of the intrinsic emulation function.
 492  *
 493  * @param method  the method type of the emulation function
 494  * @param op      the emulated ir_op
 495  * @param imode   the input mode of the emulated opcode
 496  * @param omode   the output mode of the emulated opcode
 497  * @param env     the lower environment
 498  */
 499 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 500                                       ir_mode *imode, ir_mode *omode,
 501                                       lower_env_t *env) {
 502         symconst_symbol sym;
 503         ir_entity *ent;
 504         op_mode_entry_t key, *entry;
 505
 506         key.op    = op;
 507         key.imode = imode;
 508         key.omode = omode;
 509         key.ent   = NULL;
 510
 511         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 512                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 513         if (! entry->ent) {
 514                 /* create a new one */
 515                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 516
 517                 assert(ent && "Intrinsic creator must return an entity");
 518                 entry->ent = ent;
 519         } else {
 520                 ent = entry->ent;
 521         }  /* if */
 522         sym.entity_p = ent;
 523         return new_r_SymConst(current_ir_graph, mode_P_code, sym, symconst_addr_ent);
 524 }  /* get_intrinsic_address */
 525
 526 /**
 527  * Translate a Div.
 528  *
 529  * Create an intrinsic Call.
 530  */
 531 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env)
 532 {
 533         ir_node  *block, *irn, *call, *proj;
 534         ir_node  *in[4];
 535         ir_mode  *opmode;
 536         dbg_info *dbg;
 537         ir_type  *mtp;
 538         int      idx;
 539         node_entry_t *entry;
 540
 541         irn   = get_Div_left(node);
 542         entry = env->entries[get_irn_idx(irn)];
 543         assert(entry);
 544
 545         if (! entry->low_word) {
 546                 /* not ready yet, wait */
 547                 pdeq_putr(env->waitq, node);
 548                 return;
 549         }  /* if */
 550
 551         in[0] = entry->low_word;
 552         in[1] = entry->high_word;
 553
 554         irn   = get_Div_right(node);
 555         entry = env->entries[get_irn_idx(irn)];
 556         assert(entry);
 557
 558         if (! entry->low_word) {
 559                 /* not ready yet, wait */
 560                 pdeq_putr(env->waitq, node);
 561                 return;
 562         }  /* if */
 563
 564         in[2] = entry->low_word;
 565         in[3] = entry->high_word;
 566
 567         dbg   = get_irn_dbg_info(node);
 568         block = get_nodes_block(node);
 569
 570         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 571         opmode = get_irn_op_mode(node);
 572         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 573         call = new_rd_Call(dbg, block, get_Div_mem(node), irn, 4, in, mtp);
 574         set_irn_pinned(call, get_irn_pinned(node));
 575         irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
 576
 577         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 578                 switch (get_Proj_proj(proj)) {
 579                 case pn_Div_M:         /* Memory result. */
 580                         /* reroute to the call */
 581                         set_Proj_pred(proj, call);
 582                         set_Proj_proj(proj, pn_Call_M);
 583                         break;
 584                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 585                         /* reroute to the call */
 586                         set_Proj_pred(proj, call);
 587                         set_Proj_proj(proj, pn_Call_X_except);
 588                         break;
 589                 case pn_Div_res:       /* Result of computation. */
 590                         idx = get_irn_idx(proj);
 591                         assert(idx < env->n_entries);
 592                         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 593                         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 594                         break;
 595                 default:
 596                         assert(0 && "unexpected Proj number");
 597                 }  /* switch */
 598                 /* mark this proj: we have handled it already, otherwise we might fall into
 599                  * out new nodes. */
 600                 mark_irn_visited(proj);
 601         }  /* for */
 602 }  /* lower_Div */
 603
 604 /**
 605  * Translate a Mod.
 606  *
 607  * Create an intrinsic Call.
 608  */
 609 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env)
 610 {
 611         ir_node  *block, *proj, *irn, *call;
 612         ir_node  *in[4];
 613         ir_mode  *opmode;
 614         dbg_info *dbg;
 615         ir_type  *mtp;
 616         int      idx;
 617         node_entry_t *entry;
 618
 619         irn   = get_Mod_left(node);
 620         entry = env->entries[get_irn_idx(irn)];
 621         assert(entry);
 622
 623         if (! entry->low_word) {
 624                 /* not ready yet, wait */
 625                 pdeq_putr(env->waitq, node);
 626                 return;
 627         }  /* if */
 628
 629         in[0] = entry->low_word;
 630         in[1] = entry->high_word;
 631
 632         irn   = get_Mod_right(node);
 633         entry = env->entries[get_irn_idx(irn)];
 634         assert(entry);
 635
 636         if (! entry->low_word) {
 637                 /* not ready yet, wait */
 638                 pdeq_putr(env->waitq, node);
 639                 return;
 640         }  /* if */
 641
 642         in[2] = entry->low_word;
 643         in[3] = entry->high_word;
 644
 645         dbg   = get_irn_dbg_info(node);
 646         block = get_nodes_block(node);
 647
 648         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 649         opmode = get_irn_op_mode(node);
 650         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 651         call = new_rd_Call(dbg, block, get_Mod_mem(node), irn, 4, in, mtp);
 652         set_irn_pinned(call, get_irn_pinned(node));
 653         irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
 654
 655         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 656                 switch (get_Proj_proj(proj)) {
 657                 case pn_Mod_M:         /* Memory result. */
 658                         /* reroute to the call */
 659                         set_Proj_pred(proj, call);
 660                         set_Proj_proj(proj, pn_Call_M);
 661                         break;
 662                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 663                         /* reroute to the call */
 664                         set_Proj_pred(proj, call);
 665                         set_Proj_proj(proj, pn_Call_X_except);
 666                         break;
 667                 case pn_Mod_res:       /* Result of computation. */
 668                         idx = get_irn_idx(proj);
 669                         assert(idx < env->n_entries);
 670                         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 671                         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 672                         break;
 673                 default:
 674                         assert(0 && "unexpected Proj number");
 675                 }  /* switch */
 676                 /* mark this proj: we have handled it already, otherwise we might fall into
 677                  * out new nodes. */
 678                 mark_irn_visited(proj);
 679         }  /* for */
 680 }  /* lower_Mod */
 681
 682 /**
 683  * Translate a DivMod.
 684  *
 685  * Create two intrinsic Calls.
 686  */
 687 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env)
 688 {
 689         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod;
 690         ir_node  *resDiv = NULL;
 691         ir_node  *resMod = NULL;
 692         ir_node  *in[4];
 693         ir_mode  *opmode;
 694         dbg_info *dbg;
 695         ir_type  *mtp;
 696         int      idx;
 697         node_entry_t *entry;
 698         unsigned flags = 0;
 699
 700         /* check if both results are needed */
 701         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 702                 switch (get_Proj_proj(proj)) {
 703                 case pn_DivMod_res_div: flags |= 1; break;
 704                 case pn_DivMod_res_mod: flags |= 2; break;
 705                 default: break;
 706                 }  /* switch */
 707         }  /* for */
 708
 709         irn   = get_DivMod_left(node);
 710         entry = env->entries[get_irn_idx(irn)];
 711         assert(entry);
 712
 713         if (! entry->low_word) {
 714                 /* not ready yet, wait */
 715                 pdeq_putr(env->waitq, node);
 716                 return;
 717         }  /* if */
 718
 719         in[0] = entry->low_word;
 720         in[1] = entry->high_word;
 721
 722         irn   = get_DivMod_right(node);
 723         entry = env->entries[get_irn_idx(irn)];
 724         assert(entry);
 725
 726         if (! entry->low_word) {
 727                 /* not ready yet, wait */
 728                 pdeq_putr(env->waitq, node);
 729                 return;
 730         }  /* if */
 731
 732         in[2] = entry->low_word;
 733         in[3] = entry->high_word;
 734
 735         dbg   = get_irn_dbg_info(node);
 736         block = get_nodes_block(node);
 737
 738         mem = get_DivMod_mem(node);
 739
 740         callDiv = callMod = NULL;
 741         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 742         if (flags & 1) {
 743                 opmode = get_irn_op_mode(node);
 744                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, env);
 745                 callDiv = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 746                 set_irn_pinned(callDiv, get_irn_pinned(node));
 747                 resDiv = new_r_Proj(block, callDiv, mode_T, pn_Call_T_result);
 748         }  /* if */
 749         if (flags & 2) {
 750                 if (flags & 1)
 751                         mem = new_r_Proj(block, callDiv, mode_M, pn_Call_M);
 752                 opmode = get_irn_op_mode(node);
 753                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, env);
 754                 callMod = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 755                 set_irn_pinned(callMod, get_irn_pinned(node));
 756                 resMod = new_r_Proj(block, callMod, mode_T, pn_Call_T_result);
 757         }  /* if */
 758
 759         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 760                 switch (get_Proj_proj(proj)) {
 761                 case pn_DivMod_M:         /* Memory result. */
 762                         /* reroute to the first call */
 763                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 764                         set_Proj_proj(proj, pn_Call_M);
 765                         break;
 766                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 767                         /* reroute to the first call */
 768                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 769                         set_Proj_proj(proj, pn_Call_X_except);
 770                         break;
 771                 case pn_DivMod_res_div:   /* Result of Div. */
 772                         idx = get_irn_idx(proj);
 773                         assert(idx < env->n_entries);
 774                         env->entries[idx]->low_word  = new_r_Proj(block, resDiv, env->params->low_unsigned, 0);
 775                         env->entries[idx]->high_word = new_r_Proj(block, resDiv, mode,                      1);
 776                         break;
 777                 case pn_DivMod_res_mod:   /* Result of Mod. */
 778                         idx = get_irn_idx(proj);
 779                         env->entries[idx]->low_word  = new_r_Proj(block, resMod, env->params->low_unsigned, 0);
 780                         env->entries[idx]->high_word = new_r_Proj(block, resMod, mode,                      1);
 781                         break;
 782                 default:
 783                         assert(0 && "unexpected Proj number");
 784                 }  /* switch */
 785                 /* mark this proj: we have handled it already, otherwise we might fall into
 786                  * out new nodes. */
 787                 mark_irn_visited(proj);
 788         }  /* for */
 789 }  /* lower_DivMod */
 790
 791 /**
 792  * Translate a Binop.
 793  *
 794  * Create an intrinsic Call.
 795  */
 796 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env)
 797 {
 798         ir_node  *block, *irn;
 799         ir_node  *in[4];
 800         dbg_info *dbg;
 801         ir_type  *mtp;
 802         int      idx;
 803         ir_graph *irg;
 804         node_entry_t *entry;
 805
 806         irn   = get_binop_left(node);
 807         entry = env->entries[get_irn_idx(irn)];
 808         assert(entry);
 809
 810         if (! entry->low_word) {
 811                 /* not ready yet, wait */
 812                 pdeq_putr(env->waitq, node);
 813                 return;
 814         }  /* if */
 815
 816         in[0] = entry->low_word;
 817         in[1] = entry->high_word;
 818
 819         irn   = get_binop_right(node);
 820         entry = env->entries[get_irn_idx(irn)];
 821         assert(entry);
 822
 823         if (! entry->low_word) {
 824                 /* not ready yet, wait */
 825                 pdeq_putr(env->waitq, node);
 826                 return;
 827         }  /* if */
 828
 829         in[2] = entry->low_word;
 830         in[3] = entry->high_word;
 831
 832         dbg   = get_irn_dbg_info(node);
 833         block = get_nodes_block(node);
 834         irg   = current_ir_graph;
 835
 836         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 837         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 838         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 839                 irn, 4, in, mtp);
 840         set_irn_pinned(irn, get_irn_pinned(node));
 841         irn = new_r_Proj(block, irn, mode_T, pn_Call_T_result);
 842
 843         idx = get_irn_idx(node);
 844         assert(idx < env->n_entries);
 845         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 846         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 847 }  /* lower_Binop */
 848
 849 /**
 850  * Translate a Shiftop.
 851  *
 852  * Create an intrinsic Call.
 853  */
 854 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env)
 855 {
 856         ir_node  *block, *irn;
 857         ir_node  *in[3];
 858         dbg_info *dbg;
 859         ir_type  *mtp;
 860         int      idx;
 861         ir_graph *irg;
 862         node_entry_t *entry;
 863
 864         irn   = get_binop_left(node);
 865         entry = env->entries[get_irn_idx(irn)];
 866         assert(entry);
 867
 868         if (! entry->low_word) {
 869                 /* not ready yet, wait */
 870                 pdeq_putr(env->waitq, node);
 871                 return;
 872         }  /* if */
 873
 874         in[0] = entry->low_word;
 875         in[1] = entry->high_word;
 876
 877         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 878         in[2] = get_binop_right(node);
 879         assert(get_irn_mode(in[2]) != env->params->high_signed
 880                         && get_irn_mode(in[2]) != env->params->high_unsigned);
 881
 882         dbg   = get_irn_dbg_info(node);
 883         block = get_nodes_block(node);
 884         irg  = current_ir_graph;
 885
 886         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 887         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 888         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 889                 irn, 3, in, mtp);
 890         set_irn_pinned(irn, get_irn_pinned(node));
 891         irn = new_r_Proj(block, irn, mode_T, pn_Call_T_result);
 892
 893         idx = get_irn_idx(node);
 894         assert(idx < env->n_entries);
 895         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 896         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 897 }  /* lower_Shiftop */
 898
 899 /**
 900  * Translate a Shr and handle special cases.
 901  */
 902 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env)
 903 {
 904         ir_node  *right = get_Shr_right(node);
 905         ir_graph *irg = current_ir_graph;
 906
 907         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 908                 tarval *tv = get_Const_tarval(right);
 909
 910                 if (tarval_is_long(tv) &&
 911                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 912                         ir_node *block = get_nodes_block(node);
 913                         ir_node *left = get_Shr_left(node);
 914                         ir_node *c;
 915                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 916                         int idx = get_irn_idx(left);
 917
 918                         left = env->entries[idx]->high_word;
 919                         if (left == NULL) {
 920                                 /* not ready yet, wait */
 921                                 pdeq_putr(env->waitq, node);
 922                                 return;
 923                         }
 924
 925                         idx = get_irn_idx(node);
 926
 927                         if (shf_cnt > 0) {
 928                                 c = new_r_Const_long(irg, env->params->low_unsigned, shf_cnt);
 929                                 env->entries[idx]->low_word = new_r_Shr(block, left, c, mode);
 930                         } else {
 931                                 env->entries[idx]->low_word = left;
 932                         }  /* if */
 933                         env->entries[idx]->high_word = new_r_Const(irg, get_mode_null(mode));
 934
 935                         return;
 936                 }  /* if */
 937         }  /* if */
 938         lower_Shiftop(node, mode, env);
 939 }  /* lower_Shr */
 940
 941 /**
 942  * Translate a Shl and handle special cases.
 943  */
 944 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env)
 945 {
 946         ir_node  *right = get_Shl_right(node);
 947         ir_graph *irg = current_ir_graph;
 948
 949         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 950                 tarval *tv = get_Const_tarval(right);
 951
 952                 if (tarval_is_long(tv) &&
 953                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 954                         ir_mode *mode_l;
 955                         ir_node *block = get_nodes_block(node);
 956                         ir_node *left = get_Shl_left(node);
 957                         ir_node *c;
 958                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 959                         int idx = get_irn_idx(left);
 960
 961                         left = new_r_Conv(block, env->entries[idx]->low_word, mode);
 962                         idx = get_irn_idx(node);
 963
 964                         mode_l = env->params->low_unsigned;
 965                         if (shf_cnt > 0) {
 966                                 c = new_r_Const_long(irg, mode_l, shf_cnt);
 967                                 env->entries[idx]->high_word = new_r_Shl(block, left, c, mode);
 968                         } else {
 969                                 env->entries[idx]->high_word = left;
 970                         }  /* if */
 971                         env->entries[idx]->low_word  = new_r_Const(irg, get_mode_null(mode_l));
 972
 973                         return;
 974                 }  /* if */
 975         }  /* if */
 976         lower_Shiftop(node, mode, env);
 977 }  /* lower_Shl */
 978
 979 /**
 980  * Translate a Shrs and handle special cases.
 981  */
 982 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env)
 983 {
 984         ir_node  *right = get_Shrs_right(node);
 985         ir_graph *irg = current_ir_graph;
 986
 987         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 988                 tarval *tv = get_Const_tarval(right);
 989
 990                 if (tarval_is_long(tv) &&
 991                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 992                         ir_node *block   = get_nodes_block(node);
 993                         ir_node *left    = get_Shrs_left(node);
 994                         long     shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 995                         int      idx     = get_irn_idx(left);
 996                         ir_mode *mode_l;
 997                         ir_node *low;
 998                         ir_node *c;
 999
1000                         left = env->entries[idx]->high_word;
1001                         idx = get_irn_idx(node);
1002
1003                         mode_l = env->params->low_unsigned;
1004                         if (shf_cnt > 0) {
1005                                 c   = new_r_Const_long(irg, mode_l, shf_cnt);
1006                                 low = new_r_Shrs(block, left, c, mode);
1007                         } else {
1008                                 low = left;
1009                         }  /* if */
1010                         /* low word is expected to have mode_l */
1011                         env->entries[idx]->low_word = new_r_Conv(block, low, mode_l);
1012
1013                         c = new_r_Const_long(irg, mode_l, get_mode_size_bits(mode) - 1);
1014                         env->entries[idx]->high_word = new_r_Shrs(block, left, c, mode);
1015
1016                         return;
1017                 }  /* if */
1018         }  /* if */
1019         lower_Shiftop(node, mode, env);
1020 }  /* lower_Shrs */
1021
1022 /**
1023  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1024  */
1025 static void prepare_links_and_handle_rotl(ir_node *node, void *env)
1026 {
1027         lower_env_t *lenv = env;
1028
1029         if (is_Rotl(node)) {
1030                 ir_mode *mode = get_irn_op_mode(node);
1031                         if (mode == lenv->params->high_signed ||
1032                             mode == lenv->params->high_unsigned) {
1033                                 ir_node  *right = get_Rotl_right(node);
1034                                 ir_node  *left, *shl, *shr, *or, *block, *sub, *c;
1035                                 ir_mode  *omode, *rmode;
1036                                 dbg_info *dbg;
1037                                 optimization_state_t state;
1038
1039                                 if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1040                                         tarval *tv = get_Const_tarval(right);
1041
1042                                         if (tarval_is_long(tv) &&
1043                                             get_tarval_long(tv) == (long)get_mode_size_bits(mode)) {
1044                                                 /* will be optimized in lower_Rotl() */
1045                                                 return;
1046                                         }
1047                                 }
1048
1049                                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) and lower those */
1050                                 dbg   = get_irn_dbg_info(node);
1051                                 omode = get_irn_mode(node);
1052                                 left  = get_Rotl_left(node);
1053                                 block = get_nodes_block(node);
1054                                 shl   = new_rd_Shl(dbg, block, left, right, omode);
1055                                 rmode = get_irn_mode(right);
1056                                 c     = new_Const_long(rmode, get_mode_size_bits(omode));
1057                                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
1058                                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
1059
1060                                 /* optimization must be switched off here, or we will get the Rotl back */
1061                                 save_optimization_state(&state);
1062                                 set_opt_algebraic_simplification(0);
1063                                 or = new_rd_Or(dbg, block, shl, shr, omode);
1064                                 restore_optimization_state(&state);
1065
1066                                 exchange(node, or);
1067
1068                                 /* do lowering on the new nodes */
1069                                 prepare_links(shl, env);
1070                                 prepare_links(c, env);
1071                                 prepare_links(sub, env);
1072                                 prepare_links(shr, env);
1073                                 prepare_links(or, env);
1074                         }
1075         } else {
1076                 prepare_links(node, env);
1077         }
1078 }
1079
1080 /**
1081  * Translate a special case Rotl(x, sizeof(w)).
1082  */
1083 static void lower_Rotl(ir_node *node, ir_mode *mode, lower_env_t *env)
1084 {
1085         ir_node *right = get_Rotl_right(node);
1086         ir_node *left = get_Rotl_left(node);
1087         ir_node *h, *l;
1088         int idx = get_irn_idx(left);
1089         (void) right;
1090         (void) mode;
1091
1092         assert(get_mode_arithmetic(mode) == irma_twos_complement &&
1093                is_Const(right) && tarval_is_long(get_Const_tarval(right)) &&
1094                get_tarval_long(get_Const_tarval(right)) == (long)get_mode_size_bits(mode));
1095
1096         l = env->entries[idx]->low_word;
1097         h = env->entries[idx]->high_word;
1098         idx = get_irn_idx(node);
1099
1100         env->entries[idx]->low_word  = h;
1101         env->entries[idx]->high_word = l;
1102 }  /* lower_Rotl */
1103
1104 /**
1105  * Translate an Unop.
1106  *
1107  * Create an intrinsic Call.
1108  */
1109 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env)
1110 {
1111         ir_node  *block, *irn;
1112         ir_node  *in[2];
1113         dbg_info *dbg;
1114         ir_type  *mtp;
1115         int      idx;
1116         node_entry_t *entry;
1117
1118         irn   = get_unop_op(node);
1119         entry = env->entries[get_irn_idx(irn)];
1120         assert(entry);
1121
1122         if (! entry->low_word) {
1123                 /* not ready yet, wait */
1124                 pdeq_putr(env->waitq, node);
1125                 return;
1126         }  /* if */
1127
1128         in[0] = entry->low_word;
1129         in[1] = entry->high_word;
1130
1131         dbg   = get_irn_dbg_info(node);
1132         block = get_nodes_block(node);
1133
1134         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1135         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
1136         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
1137                 irn, 2, in, mtp);
1138         set_irn_pinned(irn, get_irn_pinned(node));
1139         irn = new_r_Proj(block, irn, mode_T, pn_Call_T_result);
1140
1141         idx = get_irn_idx(node);
1142         assert(idx < env->n_entries);
1143         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
1144         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
1145 }  /* lower_Unop */
1146
1147 /**
1148  * Translate a logical Binop.
1149  *
1150  * Create two logical Binops.
1151  */
1152 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1153                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1154         ir_node  *block, *irn;
1155         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1156         dbg_info *dbg;
1157         int      idx;
1158         ir_graph *irg;
1159         node_entry_t *entry;
1160
1161         irn   = get_binop_left(node);
1162         entry = env->entries[get_irn_idx(irn)];
1163         assert(entry);
1164
1165         if (! entry->low_word) {
1166                 /* not ready yet, wait */
1167                 pdeq_putr(env->waitq, node);
1168                 return;
1169         }  /* if */
1170
1171         lop_l = entry->low_word;
1172         lop_h = entry->high_word;
1173
1174         irn   = get_binop_right(node);
1175         entry = env->entries[get_irn_idx(irn)];
1176         assert(entry);
1177
1178         if (! entry->low_word) {
1179                 /* not ready yet, wait */
1180                 pdeq_putr(env->waitq, node);
1181                 return;
1182         }  /* if */
1183
1184         rop_l = entry->low_word;
1185         rop_h = entry->high_word;
1186
1187         dbg = get_irn_dbg_info(node);
1188         block = get_nodes_block(node);
1189
1190         idx = get_irn_idx(node);
1191         assert(idx < env->n_entries);
1192         irg = current_ir_graph;
1193         env->entries[idx]->low_word  = constr_rd(dbg, block, lop_l, rop_l, env->params->low_unsigned);
1194         env->entries[idx]->high_word = constr_rd(dbg, block, lop_h, rop_h, mode);
1195 }  /* lower_Binop_logical */
1196
1197 /** create a logical operation transformation */
1198 #define lower_logical(op)                                                \
1199 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1200         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1201 }
1202
1203 lower_logical(And)
1204 lower_logical(Or)
1205 lower_logical(Eor)
1206
1207 /**
1208  * Translate a Not.
1209  *
1210  * Create two logical Nots.
1211  */
1212 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env)
1213 {
1214         ir_node  *block, *irn;
1215         ir_node  *op_l, *op_h;
1216         dbg_info *dbg;
1217         int      idx;
1218         node_entry_t *entry;
1219
1220         irn   = get_Not_op(node);
1221         entry = env->entries[get_irn_idx(irn)];
1222         assert(entry);
1223
1224         if (! entry->low_word) {
1225                 /* not ready yet, wait */
1226                 pdeq_putr(env->waitq, node);
1227                 return;
1228         }  /* if */
1229
1230         op_l = entry->low_word;
1231         op_h = entry->high_word;
1232
1233         dbg   = get_irn_dbg_info(node);
1234         block = get_nodes_block(node);
1235
1236         idx = get_irn_idx(node);
1237         assert(idx < env->n_entries);
1238         env->entries[idx]->low_word  = new_rd_Not(dbg, block, op_l, env->params->low_unsigned);
1239         env->entries[idx]->high_word = new_rd_Not(dbg, block, op_h, mode);
1240 }  /* lower_Not */
1241
1242 /**
1243  * Translate a Cond.
1244  */
1245 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env)
1246 {
1247         ir_node *cmp, *left, *right, *block;
1248         ir_node *sel = get_Cond_selector(node);
1249         ir_mode *m = get_irn_mode(sel);
1250         int     idx;
1251         (void) mode;
1252
1253         if (m == mode_b) {
1254                 node_entry_t *lentry, *rentry;
1255                 ir_node  *proj, *projT = NULL, *projF = NULL;
1256                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1257                 ir_node  *projHF, *projHT;
1258                 ir_node  *dst_blk;
1259                 pn_Cmp   pnc;
1260                 ir_graph *irg;
1261                 dbg_info *dbg;
1262
1263                 if (!is_Proj(sel))
1264                         return;
1265
1266                 cmp   = get_Proj_pred(sel);
1267                 if (!is_Cmp(cmp))
1268                         return;
1269
1270                 left  = get_Cmp_left(cmp);
1271                 idx   = get_irn_idx(left);
1272                 lentry = env->entries[idx];
1273
1274                 if (! lentry) {
1275                         /* a normal Cmp */
1276                         return;
1277                 }  /* if */
1278
1279                 right = get_Cmp_right(cmp);
1280                 idx   = get_irn_idx(right);
1281                 rentry = env->entries[idx];
1282                 assert(rentry);
1283
1284                 if (! lentry->low_word || !rentry->low_word) {
1285                         /* not yet ready */
1286                         pdeq_putr(env->waitq, node);
1287                         return;
1288                 }  /* if */
1289
1290                 /* all right, build the code */
1291                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1292                         long proj_nr = get_Proj_proj(proj);
1293
1294                         if (proj_nr == pn_Cond_true) {
1295                                 assert(projT == NULL && "more than one Proj(true)");
1296                                 projT = proj;
1297                         } else {
1298                                 assert(proj_nr == pn_Cond_false);
1299                                 assert(projF == NULL && "more than one Proj(false)");
1300                                 projF = proj;
1301                         }  /* if */
1302                         mark_irn_visited(proj);
1303                 }  /* for */
1304                 assert(projT && projF);
1305
1306                 /* create a new high compare */
1307                 block = get_nodes_block(node);
1308                 irg   = get_Block_irg(block);
1309                 dbg   = get_irn_dbg_info(cmp);
1310                 pnc   = get_Proj_proj(sel);
1311
1312                 if (is_Const(right) && is_Const_null(right)) {
1313                         if (pnc == pn_Cmp_Eq || pnc == pn_Cmp_Lg) {
1314                                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1315                                 ir_mode *mode = env->params->low_unsigned;
1316                                 ir_node *low  = new_r_Conv(block, lentry->low_word, mode);
1317                                 ir_node *high = new_r_Conv(block, lentry->high_word, mode);
1318                                 ir_node *or   = new_rd_Or(dbg, block, low, high, mode);
1319                                 ir_node *cmp  = new_rd_Cmp(dbg, block, or, new_Const_long(mode, 0));
1320
1321                                 ir_node *proj = new_r_Proj(block, cmp, mode_b, pnc);
1322                                 set_Cond_selector(node, proj);
1323                                 return;
1324                         }
1325                 }
1326
1327                 cmpH = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word);
1328
1329                 if (pnc == pn_Cmp_Eq) {
1330                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1331                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1332
1333                         assert(entry);
1334                         dst_blk = entry->value;
1335
1336                         irn = new_r_Proj(block, cmpH, mode_b, pn_Cmp_Eq);
1337                         dbg = get_irn_dbg_info(node);
1338                         irn = new_rd_Cond(dbg, block, irn);
1339
1340                         projHF = new_r_Proj(block, irn, mode_X, pn_Cond_false);
1341                         mark_irn_visited(projHF);
1342                         exchange(projF, projHF);
1343
1344                         projHT = new_r_Proj(block, irn, mode_X, pn_Cond_true);
1345                         mark_irn_visited(projHT);
1346
1347                         new_bl = new_r_Block(irg, 1, &projHT);
1348
1349                         dbg   = get_irn_dbg_info(cmp);
1350                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1351                         irn = new_r_Proj(new_bl, cmpL, mode_b, pn_Cmp_Eq);
1352                         dbg = get_irn_dbg_info(node);
1353                         irn = new_rd_Cond(dbg, new_bl, irn);
1354
1355                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_false);
1356                         mark_irn_visited(proj);
1357                         add_block_cf_input(dst_blk, projHF, proj);
1358
1359                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_true);
1360                         mark_irn_visited(proj);
1361                         exchange(projT, proj);
1362                 } else if (pnc == pn_Cmp_Lg) {
1363                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1364                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1365
1366                         assert(entry);
1367                         dst_blk = entry->value;
1368
1369                         irn = new_r_Proj(block, cmpH, mode_b, pn_Cmp_Lg);
1370                         dbg = get_irn_dbg_info(node);
1371                         irn = new_rd_Cond(dbg, block, irn);
1372
1373                         projHT = new_r_Proj(block, irn, mode_X, pn_Cond_true);
1374                         mark_irn_visited(projHT);
1375                         exchange(projT, projHT);
1376
1377                         projHF = new_r_Proj(block, irn, mode_X, pn_Cond_false);
1378                         mark_irn_visited(projHF);
1379
1380                         new_bl = new_r_Block(irg, 1, &projHF);
1381
1382                         dbg   = get_irn_dbg_info(cmp);
1383                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1384                         irn = new_r_Proj(new_bl, cmpL, mode_b, pn_Cmp_Lg);
1385                         dbg = get_irn_dbg_info(node);
1386                         irn = new_rd_Cond(dbg, new_bl, irn);
1387
1388                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_true);
1389                         mark_irn_visited(proj);
1390                         add_block_cf_input(dst_blk, projHT, proj);
1391
1392                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_false);
1393                         mark_irn_visited(proj);
1394                         exchange(projF, proj);
1395                 } else {
1396                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1397                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1398                         pmap_entry *entry;
1399
1400                         entry = pmap_find(env->proj_2_block, projT);
1401                         assert(entry);
1402                         dstT = entry->value;
1403
1404                         entry = pmap_find(env->proj_2_block, projF);
1405                         assert(entry);
1406                         dstF = entry->value;
1407
1408                         irn = new_r_Proj(block, cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1409                         dbg = get_irn_dbg_info(node);
1410                         irn = new_rd_Cond(dbg, block, irn);
1411
1412                         projHT = new_r_Proj(block, irn, mode_X, pn_Cond_true);
1413                         mark_irn_visited(projHT);
1414                         exchange(projT, projHT);
1415                         projT = projHT;
1416
1417                         projHF = new_r_Proj(block, irn, mode_X, pn_Cond_false);
1418                         mark_irn_visited(projHF);
1419
1420                         newbl_eq = new_r_Block(irg, 1, &projHF);
1421
1422                         irn = new_r_Proj(block, cmpH, mode_b, pn_Cmp_Eq);
1423                         irn = new_rd_Cond(dbg, newbl_eq, irn);
1424
1425                         proj = new_r_Proj(newbl_eq, irn, mode_X, pn_Cond_false);
1426                         mark_irn_visited(proj);
1427                         exchange(projF, proj);
1428                         projF = proj;
1429
1430                         proj = new_r_Proj(newbl_eq, irn, mode_X, pn_Cond_true);
1431                         mark_irn_visited(proj);
1432
1433                         newbl_l = new_r_Block(irg, 1, &proj);
1434
1435                         dbg   = get_irn_dbg_info(cmp);
1436                         cmpL = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word);
1437                         irn = new_r_Proj(newbl_l, cmpL, mode_b, pnc);
1438                         dbg = get_irn_dbg_info(node);
1439                         irn = new_rd_Cond(dbg, newbl_l, irn);
1440
1441                         proj = new_r_Proj(newbl_l, irn, mode_X, pn_Cond_true);
1442                         mark_irn_visited(proj);
1443                         add_block_cf_input(dstT, projT, proj);
1444
1445                         proj = new_r_Proj(newbl_l, irn, mode_X, pn_Cond_false);
1446                         mark_irn_visited(proj);
1447                         add_block_cf_input(dstF, projF, proj);
1448                 }  /* if */
1449
1450                 /* we have changed the control flow */
1451                 env->flags |= CF_CHANGED;
1452         } else {
1453                 idx = get_irn_idx(sel);
1454
1455                 if (env->entries[idx]) {
1456                         /*
1457                            Bad, a jump-table with double-word index.
1458                            This should not happen, but if it does we handle
1459                            it like a Conv were between (in other words, ignore
1460                            the high part.
1461                          */
1462
1463                         if (! env->entries[idx]->low_word) {
1464                                 /* not ready yet, wait */
1465                                 pdeq_putr(env->waitq, node);
1466                                 return;
1467                         }  /* if */
1468                         set_Cond_selector(node, env->entries[idx]->low_word);
1469                 }  /* if */
1470         }  /* if */
1471 }  /* lower_Cond */
1472
1473 /**
1474  * Translate a Conv to higher_signed
1475  */
1476 static void lower_Conv_to_Ll(ir_node *node, lower_env_t *env)
1477 {
1478         ir_mode  *omode        = get_irn_mode(node);
1479         ir_node  *op           = get_Conv_op(node);
1480         ir_mode  *imode        = get_irn_mode(op);
1481         int      idx           = get_irn_idx(node);
1482         ir_graph *irg          = current_ir_graph;
1483         ir_node  *block        = get_nodes_block(node);
1484         dbg_info *dbg          = get_irn_dbg_info(node);
1485         node_entry_t *entry = env->entries[idx];
1486         ir_mode  *low_unsigned = env->params->low_unsigned;
1487         ir_mode  *low_signed
1488                 = mode_is_signed(omode) ? env->params->low_signed : low_unsigned;
1489
1490         assert(idx < env->n_entries);
1491
1492         if (mode_is_int(imode) || mode_is_reference(imode)) {
1493                 if (imode == env->params->high_signed
1494                                 || imode == env->params->high_unsigned) {
1495                         /* a Conv from Lu to Ls or Ls to Lu */
1496                         int           op_idx   = get_irn_idx(op);
1497                         node_entry_t *op_entry = env->entries[op_idx];
1498
1499                         if (! op_entry->low_word) {
1500                                 /* not ready yet, wait */
1501                                 pdeq_putr(env->waitq, node);
1502                                 return;
1503                         }
1504                         entry->low_word  = op_entry->low_word;
1505                         entry->high_word = new_rd_Conv(dbg, block, op_entry->high_word,
1506                                                        low_signed);
1507                 } else {
1508                         /* simple case: create a high word */
1509                         if (imode != low_unsigned)
1510                                 op = new_rd_Conv(dbg, block, op, low_unsigned);
1511
1512                         entry->low_word = op;
1513
1514                         if (mode_is_signed(imode)) {
1515                                 int      c       = get_mode_size_bits(low_signed) - 1;
1516                                 ir_node *cnst    = new_Const_long(low_unsigned, c);
1517                                 if (get_irn_mode(op) != low_signed)
1518                                         op = new_rd_Conv(dbg, block, op, low_signed);
1519                                 entry->high_word = new_rd_Shrs(dbg, block, op, cnst,
1520                                                                low_signed);
1521                         } else {
1522                                 entry->high_word = new_Const(get_mode_null(low_signed));
1523                         }
1524                 }
1525         } else if (imode == mode_b) {
1526                 entry->low_word = new_rd_Conv(dbg, block, op, low_unsigned);
1527                 entry->high_word = new_Const(get_mode_null(low_signed));
1528         } else {
1529                 ir_node *irn, *call;
1530                 ir_type *mtp = get_conv_type(imode, omode, env);
1531
1532                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1533                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1534                 set_irn_pinned(call, get_irn_pinned(node));
1535                 irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
1536
1537                 entry->low_word  = new_r_Proj(block, irn, low_unsigned, 0);
1538                 entry->high_word = new_r_Proj(block, irn, low_signed, 1);
1539         }
1540 }
1541
1542 /**
1543  * Translate a Conv from higher_unsigned
1544  */
1545 static void lower_Conv_from_Ll(ir_node *node, lower_env_t *env)
1546 {
1547         ir_node      *op    = get_Conv_op(node);
1548         ir_mode      *omode = get_irn_mode(node);
1549         ir_node      *block = get_nodes_block(node);
1550         dbg_info     *dbg   = get_irn_dbg_info(node);
1551         int          idx    = get_irn_idx(op);
1552         ir_graph     *irg   = current_ir_graph;
1553         node_entry_t *entry = env->entries[idx];
1554
1555         assert(idx < env->n_entries);
1556
1557         if (! entry->low_word) {
1558                 /* not ready yet, wait */
1559                 pdeq_putr(env->waitq, node);
1560                 return;
1561         }
1562
1563         if (mode_is_int(omode) || mode_is_reference(omode)) {
1564                 op = entry->low_word;
1565
1566                 /* simple case: create a high word */
1567                 if (omode != env->params->low_unsigned)
1568                         op = new_rd_Conv(dbg, block, op, omode);
1569
1570                 set_Conv_op(node, op);
1571         } else if (omode == mode_b) {
1572                 /* llu ? true : false  <=> (low|high) ? true : false */
1573                 ir_mode *mode = env->params->low_unsigned;
1574                 ir_node *or   = new_rd_Or(dbg, block, entry->low_word, entry->high_word,
1575                                           mode);
1576                 set_Conv_op(node, or);
1577         } else {
1578                 ir_node *irn, *call, *in[2];
1579                 ir_mode *imode = get_irn_mode(op);
1580                 ir_type *mtp   = get_conv_type(imode, omode, env);
1581
1582                 irn   = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1583                 in[0] = entry->low_word;
1584                 in[1] = entry->high_word;
1585
1586                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1587                 set_irn_pinned(call, get_irn_pinned(node));
1588                 irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
1589
1590                 exchange(node, new_r_Proj(block, irn, omode, 0));
1591         }
1592 }
1593
1594 /**
1595  * Translate a Conv.
1596  */
1597 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env)
1598 {
1599         mode = get_irn_mode(node);
1600
1601         if (mode == env->params->high_signed
1602                         || mode == env->params->high_unsigned) {
1603                 lower_Conv_to_Ll(node, env);
1604         } else {
1605                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1606
1607                 if (mode == env->params->high_signed
1608                                 || mode == env->params->high_unsigned) {
1609                         lower_Conv_from_Ll(node, env);
1610                 }
1611         }
1612 }
1613
1614 /**
1615  * Lower the method type.
1616  *
1617  * @param mtp  the method type to lower
1618  * @param ent  the lower environment
1619  *
1620  * @return the lowered type
1621  */
1622 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env)
1623 {
1624         pmap_entry *entry;
1625         ident      *lid;
1626         ir_type    *res, *value_type;
1627
1628         if (is_lowered_type(mtp))
1629                 return mtp;
1630
1631         entry = pmap_find(lowered_type, mtp);
1632         if (! entry) {
1633                 int i, n, r, n_param, n_res;
1634
1635                 /* count new number of params */
1636                 n_param = n = get_method_n_params(mtp);
1637                 for (i = n_param - 1; i >= 0; --i) {
1638                         ir_type *tp = get_method_param_type(mtp, i);
1639
1640                         if (is_Primitive_type(tp)) {
1641                                 ir_mode *mode = get_type_mode(tp);
1642
1643                                 if (mode == env->params->high_signed ||
1644                                         mode == env->params->high_unsigned)
1645                                         ++n_param;
1646                         }  /* if */
1647                 }  /* for */
1648
1649                 /* count new number of results */
1650                 n_res = r = get_method_n_ress(mtp);
1651                 for (i = n_res - 1; i >= 0; --i) {
1652                         ir_type *tp = get_method_res_type(mtp, i);
1653
1654                         if (is_Primitive_type(tp)) {
1655                                 ir_mode *mode = get_type_mode(tp);
1656
1657                                 if (mode == env->params->high_signed ||
1658                                         mode == env->params->high_unsigned)
1659                                         ++n_res;
1660                         }  /* if */
1661                 }  /* for */
1662
1663                 res = new_type_method(n_param, n_res);
1664
1665                 /* set param types and result types */
1666                 for (i = n_param = 0; i < n; ++i) {
1667                         ir_type *tp = get_method_param_type(mtp, i);
1668
1669                         if (is_Primitive_type(tp)) {
1670                                 ir_mode *mode = get_type_mode(tp);
1671
1672                                 if (mode == env->params->high_signed) {
1673                                         set_method_param_type(res, n_param++, tp_u);
1674                                         set_method_param_type(res, n_param++, tp_s);
1675                                 } else if (mode == env->params->high_unsigned) {
1676                                         set_method_param_type(res, n_param++, tp_u);
1677                                         set_method_param_type(res, n_param++, tp_u);
1678                                 } else {
1679                                         set_method_param_type(res, n_param++, tp);
1680                                 }  /* if */
1681                         } else {
1682                                 set_method_param_type(res, n_param++, tp);
1683                         }  /* if */
1684                 }  /* for */
1685                 for (i = n_res = 0; i < r; ++i) {
1686                         ir_type *tp = get_method_res_type(mtp, i);
1687
1688                         if (is_Primitive_type(tp)) {
1689                                 ir_mode *mode = get_type_mode(tp);
1690
1691                                 if (mode == env->params->high_signed) {
1692                                         set_method_res_type(res, n_res++, tp_u);
1693                                         set_method_res_type(res, n_res++, tp_s);
1694                                 } else if (mode == env->params->high_unsigned) {
1695                                         set_method_res_type(res, n_res++, tp_u);
1696                                         set_method_res_type(res, n_res++, tp_u);
1697                                 } else {
1698                                         set_method_res_type(res, n_res++, tp);
1699                                 }  /* if */
1700                         } else {
1701                                 set_method_res_type(res, n_res++, tp);
1702                         }  /* if */
1703                 }  /* for */
1704                 set_lowered_type(mtp, res);
1705                 pmap_insert(lowered_type, mtp, res);
1706
1707                 value_type = get_method_value_param_type(mtp);
1708                 if (value_type != NULL) {
1709                         /* this creates a new value parameter type */
1710                         (void)get_method_value_param_ent(res, 0);
1711
1712                         /* set new param positions */
1713                         for (i = n_param = 0; i < n; ++i) {
1714                                 ir_type   *tp  = get_method_param_type(mtp, i);
1715                                 ident     *id  = get_method_param_ident(mtp, i);
1716                                 ir_entity *ent = get_method_value_param_ent(mtp, i);
1717
1718                                 set_entity_link(ent, INT_TO_PTR(n_param));
1719                                 if (is_Primitive_type(tp)) {
1720                                         ir_mode *mode = get_type_mode(tp);
1721
1722                                         if (mode == env->params->high_signed || mode == env->params->high_unsigned) {
1723                                                 if (id != NULL) {
1724                                                         lid = id_mangle(id, env->first_id);
1725                                                         set_method_param_ident(res, n_param, lid);
1726                                                         set_entity_ident(get_method_value_param_ent(res, n_param), lid);
1727                                                         lid = id_mangle(id, env->next_id);
1728                                                         set_method_param_ident(res, n_param + 1, lid);
1729                                                         set_entity_ident(get_method_value_param_ent(res, n_param + 1), lid);
1730                                                 }  /* if */
1731                                                 n_param += 2;
1732                                                 continue;
1733                                         }  /* if */
1734                                 }  /* if */
1735                                 if (id != NULL) {
1736                                         set_method_param_ident(res, n_param, id);
1737                                         set_entity_ident(get_method_value_param_ent(res, n_param), id);
1738                                 }  /* if */
1739                                 ++n_param;
1740                         }  /* for */
1741
1742                         set_lowered_type(value_type, get_method_value_param_type(res));
1743                 }  /* if */
1744         } else {
1745                 res = entry->value;
1746         }  /* if */
1747         return res;
1748 }  /* lower_mtp */
1749
1750 /**
1751  * Translate a Return.
1752  */
1753 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env)
1754 {
1755         ir_graph  *irg = current_ir_graph;
1756         ir_entity *ent = get_irg_entity(irg);
1757         ir_type   *mtp = get_entity_type(ent);
1758         ir_node   **in;
1759         int       i, j, n, idx;
1760         int       need_conv = 0;
1761         (void) mode;
1762
1763         /* check if this return must be lowered */
1764         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1765                 ir_node *pred = get_Return_res(node, i);
1766                 ir_mode *mode = get_irn_op_mode(pred);
1767
1768                 if (mode == env->params->high_signed ||
1769                         mode == env->params->high_unsigned) {
1770                         idx = get_irn_idx(pred);
1771                         if (! env->entries[idx]->low_word) {
1772                                 /* not ready yet, wait */
1773                                 pdeq_putr(env->waitq, node);
1774                                 return;
1775                         }  /* if */
1776                         need_conv = 1;
1777                 }  /* if */
1778         }  /* for */
1779         if (! need_conv)
1780                 return;
1781
1782         ent = get_irg_entity(irg);
1783         mtp = get_entity_type(ent);
1784
1785         mtp = lower_mtp(mtp, env);
1786         set_entity_type(ent, mtp);
1787
1788         /* create a new in array */
1789         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1790         in[0] = get_Return_mem(node);
1791
1792         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1793                 ir_node *pred = get_Return_res(node, i);
1794
1795                 idx = get_irn_idx(pred);
1796                 assert(idx < env->n_entries);
1797
1798                 if (env->entries[idx]) {
1799                         in[++j] = env->entries[idx]->low_word;
1800                         in[++j] = env->entries[idx]->high_word;
1801                 } else {
1802                         in[++j] = pred;
1803                 }  /* if */
1804         }  /* for */
1805
1806         set_irn_in(node, j+1, in);
1807 }  /* lower_Return */
1808
1809 /**
1810  * Translate the parameters.
1811  */
1812 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env)
1813 {
1814         ir_graph  *irg = get_irn_irg(node);
1815         ir_entity *ent = get_irg_entity(irg);
1816         ir_type   *tp  = get_entity_type(ent);
1817         ir_type   *mtp;
1818         long      *new_projs;
1819         int       i, j, n_params, rem;
1820         ir_node   *proj, *args;
1821         (void) mode;
1822
1823         if (is_lowered_type(tp)) {
1824                 mtp = get_associated_type(tp);
1825         } else {
1826                 mtp = tp;
1827         }  /* if */
1828         assert(! is_lowered_type(mtp));
1829
1830         n_params = get_method_n_params(mtp);
1831         if (n_params <= 0)
1832                 return;
1833
1834         NEW_ARR_A(long, new_projs, n_params);
1835
1836         /* first check if we have parameters that must be fixed */
1837         for (i = j = 0; i < n_params; ++i, ++j) {
1838                 ir_type *tp = get_method_param_type(mtp, i);
1839
1840                 new_projs[i] = j;
1841                 if (is_Primitive_type(tp)) {
1842                         ir_mode *mode = get_type_mode(tp);
1843
1844                         if (mode == env->params->high_signed ||
1845                                 mode == env->params->high_unsigned)
1846                                 ++j;
1847                 }  /* if */
1848         }  /* for */
1849         if (i == j)
1850                 return;
1851
1852         mtp = lower_mtp(mtp, env);
1853         set_entity_type(ent, mtp);
1854
1855         /* switch off optimization for new Proj nodes or they might be CSE'ed
1856            with not patched one's */
1857         rem = get_optimize();
1858         set_optimize(0);
1859
1860         /* ok, fix all Proj's and create new ones */
1861         args = get_irg_args(irg);
1862         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1863                 ir_node *pred = get_Proj_pred(proj);
1864                 long proj_nr;
1865                 int idx;
1866                 ir_mode *mode;
1867                 dbg_info *dbg;
1868
1869                 /* do not visit this node again */
1870                 mark_irn_visited(proj);
1871
1872                 if (pred != args)
1873                         continue;
1874
1875                 proj_nr = get_Proj_proj(proj);
1876                 set_Proj_proj(proj, new_projs[proj_nr]);
1877
1878                 idx = get_irn_idx(proj);
1879                 if (env->entries[idx]) {
1880                         ir_mode *low_mode = env->params->low_unsigned;
1881
1882                         mode = get_irn_mode(proj);
1883
1884                         if (mode == env->params->high_signed) {
1885                                 mode = env->params->low_signed;
1886                         } else {
1887                                 mode = env->params->low_unsigned;
1888                         }  /* if */
1889
1890                         dbg = get_irn_dbg_info(proj);
1891                         env->entries[idx]->low_word  =
1892                                 new_rd_Proj(dbg, get_nodes_block(proj), args, low_mode, new_projs[proj_nr]);
1893                         env->entries[idx]->high_word =
1894                                 new_rd_Proj(dbg, get_nodes_block(proj), args, mode, new_projs[proj_nr] + 1);
1895                 }  /* if */
1896         }  /* for */
1897         set_optimize(rem);
1898 }  /* lower_Start */
1899
1900 /**
1901  * Translate a Call.
1902  */
1903 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env)
1904 {
1905         ir_type  *tp = get_Call_type(node);
1906         ir_type  *call_tp;
1907         ir_node  **in, *proj, *results;
1908         int      n_params, n_res, need_lower = 0;
1909         int      i, j;
1910         long     *res_numbers = NULL;
1911         (void) mode;
1912
1913         if (is_lowered_type(tp)) {
1914                 call_tp = get_associated_type(tp);
1915         } else {
1916                 call_tp = tp;
1917         }  /* if */
1918
1919         assert(! is_lowered_type(call_tp));
1920
1921         n_params = get_method_n_params(call_tp);
1922         for (i = 0; i < n_params; ++i) {
1923                 ir_type *tp = get_method_param_type(call_tp, i);
1924
1925                 if (is_Primitive_type(tp)) {
1926                         ir_mode *mode = get_type_mode(tp);
1927
1928                         if (mode == env->params->high_signed ||
1929                                 mode == env->params->high_unsigned) {
1930                                 need_lower = 1;
1931                                 break;
1932                         }  /* if */
1933                 }  /* if */
1934         }  /* for */
1935         n_res = get_method_n_ress(call_tp);
1936         if (n_res > 0) {
1937                 NEW_ARR_A(long, res_numbers, n_res);
1938
1939                 for (i = j = 0; i < n_res; ++i, ++j) {
1940                         ir_type *tp = get_method_res_type(call_tp, i);
1941
1942                         res_numbers[i] = j;
1943                         if (is_Primitive_type(tp)) {
1944                                 ir_mode *mode = get_type_mode(tp);
1945
1946                                 if (mode == env->params->high_signed ||
1947                                         mode == env->params->high_unsigned) {
1948                                         need_lower = 1;
1949                                         ++j;
1950                                 }  /* if */
1951                         }  /* if */
1952                 }  /* for */
1953         }  /* if */
1954
1955         if (! need_lower)
1956                 return;
1957
1958         /* let's lower it */
1959         call_tp = lower_mtp(call_tp, env);
1960         set_Call_type(node, call_tp);
1961
1962         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1963
1964         in[0] = get_Call_mem(node);
1965         in[1] = get_Call_ptr(node);
1966
1967         for (j = 2, i = 0; i < n_params; ++i) {
1968                 ir_node *pred = get_Call_param(node, i);
1969                 int     idx = get_irn_idx(pred);
1970
1971                 if (env->entries[idx]) {
1972                         if (! env->entries[idx]->low_word) {
1973                                 /* not ready yet, wait */
1974                                 pdeq_putr(env->waitq, node);
1975                                 return;
1976                         }
1977                         in[j++] = env->entries[idx]->low_word;
1978                         in[j++] = env->entries[idx]->high_word;
1979                 } else {
1980                         in[j++] = pred;
1981                 }  /* if */
1982         }  /* for */
1983
1984         set_irn_in(node, j, in);
1985
1986         /* fix the results */
1987         results = NULL;
1988         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1989                 long proj_nr = get_Proj_proj(proj);
1990
1991                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
1992                         /* found the result proj */
1993                         results = proj;
1994                         break;
1995                 }  /* if */
1996         }  /* for */
1997
1998         if (results) {          /* there are results */
1999                 int rem = get_optimize();
2000
2001                 /* switch off optimization for new Proj nodes or they might be CSE'ed
2002                    with not patched one's */
2003                 set_optimize(0);
2004                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
2005                         if (get_Proj_pred(proj) == results) {
2006                                 long proj_nr = get_Proj_proj(proj);
2007                                 int idx;
2008
2009                                 /* found a result */
2010                                 set_Proj_proj(proj, res_numbers[proj_nr]);
2011                                 idx = get_irn_idx(proj);
2012                                 if (env->entries[idx]) {
2013                                         ir_mode *mode = get_irn_mode(proj);
2014                                         ir_mode *low_mode = env->params->low_unsigned;
2015                                         dbg_info *dbg;
2016
2017                                         if (mode == env->params->high_signed) {
2018                                                 mode = env->params->low_signed;
2019                                         } else {
2020                                                 mode = env->params->low_unsigned;
2021                                         }  /* if */
2022
2023                                         dbg = get_irn_dbg_info(proj);
2024                                         env->entries[idx]->low_word  =
2025                                                 new_rd_Proj(dbg, get_nodes_block(proj), results, low_mode, res_numbers[proj_nr]);
2026                                         env->entries[idx]->high_word =
2027                                                 new_rd_Proj(dbg, get_nodes_block(proj), results, mode, res_numbers[proj_nr] + 1);
2028                                 }  /* if */
2029                                 mark_irn_visited(proj);
2030                         }  /* if */
2031                 }  /* for */
2032                 set_optimize(rem);
2033         }
2034 }  /* lower_Call */
2035
2036 /**
2037  * Translate an Unknown into two.
2038  */
2039 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env)
2040 {
2041         int      idx = get_irn_idx(node);
2042         ir_graph *irg = get_irn_irg(node);
2043         ir_mode  *low_mode = env->params->low_unsigned;
2044
2045         env->entries[idx]->low_word  = new_r_Unknown(irg, low_mode);
2046         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2047 }  /* lower_Unknown */
2048
2049 /**
2050  * Translate a Phi.
2051  *
2052  * First step: just create two templates
2053  */
2054 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env)
2055 {
2056         ir_mode  *mode_l = env->params->low_unsigned;
2057         ir_graph *irg = get_irn_irg(phi);
2058         ir_node  *block, *unk_l, *unk_h, *phi_l, *phi_h;
2059         ir_node  **inl, **inh;
2060         dbg_info *dbg;
2061         int      idx, i, arity = get_Phi_n_preds(phi);
2062         int      enq = 0;
2063
2064         idx = get_irn_idx(phi);
2065         if (env->entries[idx]->low_word) {
2066                 /* Phi nodes already build, check for inputs */
2067                 ir_node *phil = env->entries[idx]->low_word;
2068                 ir_node *phih = env->entries[idx]->high_word;
2069
2070                 for (i = 0; i < arity; ++i) {
2071                         ir_node *pred = get_Phi_pred(phi, i);
2072                         int     idx = get_irn_idx(pred);
2073
2074                         if (env->entries[idx]->low_word) {
2075                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2076                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2077                         } else {
2078                                 /* still not ready */
2079                                 pdeq_putr(env->waitq, phi);
2080                                 return;
2081                         }  /* if */
2082                 }  /* for */
2083         }  /* if */
2084
2085         /* first create a new in array */
2086         NEW_ARR_A(ir_node *, inl, arity);
2087         NEW_ARR_A(ir_node *, inh, arity);
2088         unk_l = new_r_Unknown(irg, mode_l);
2089         unk_h = new_r_Unknown(irg, mode);
2090
2091         for (i = 0; i < arity; ++i) {
2092                 ir_node *pred = get_Phi_pred(phi, i);
2093                 int     idx = get_irn_idx(pred);
2094
2095                 if (env->entries[idx]->low_word) {
2096                         inl[i] = env->entries[idx]->low_word;
2097                         inh[i] = env->entries[idx]->high_word;
2098                 } else {
2099                         inl[i] = unk_l;
2100                         inh[i] = unk_h;
2101                         enq = 1;
2102                 }  /* if */
2103         }  /* for */
2104
2105         dbg   = get_irn_dbg_info(phi);
2106         block = get_nodes_block(phi);
2107
2108         idx = get_irn_idx(phi);
2109         assert(idx < env->n_entries);
2110         env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, block, arity, inl, mode_l);
2111         env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, block, arity, inh, mode);
2112
2113         /* Don't forget to link the new Phi nodes into the block.
2114          * Beware that some Phis might be optimized away. */
2115         if (is_Phi(phi_l))
2116                 add_Block_phi(block, phi_l);
2117         if (is_Phi(phi_h))
2118                 add_Block_phi(block, phi_h);
2119
2120         if (enq) {
2121                 /* not yet finished */
2122                 pdeq_putr(env->waitq, phi);
2123         }  /* if */
2124 }  /* lower_Phi */
2125
2126 /**
2127  * Translate a Mux.
2128  */
2129 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env)
2130 {
2131         ir_node  *block, *val;
2132         ir_node  *true_l, *true_h, *false_l, *false_h, *sel;
2133         dbg_info *dbg;
2134         int      idx;
2135
2136         val = get_Mux_true(mux);
2137         idx = get_irn_idx(val);
2138         if (env->entries[idx]->low_word) {
2139                 /* Values already build */
2140                 true_l = env->entries[idx]->low_word;
2141                 true_h = env->entries[idx]->high_word;
2142         } else {
2143                 /* still not ready */
2144                 pdeq_putr(env->waitq, mux);
2145                 return;
2146         }  /* if */
2147
2148         val = get_Mux_false(mux);
2149         idx = get_irn_idx(val);
2150         if (env->entries[idx]->low_word) {
2151                 /* Values already build */
2152                 false_l = env->entries[idx]->low_word;
2153                 false_h = env->entries[idx]->high_word;
2154         } else {
2155                 /* still not ready */
2156                 pdeq_putr(env->waitq, mux);
2157                 return;
2158         }  /* if */
2159
2160
2161         sel = get_Mux_sel(mux);
2162
2163         dbg   = get_irn_dbg_info(mux);
2164         block = get_nodes_block(mux);
2165
2166         idx = get_irn_idx(mux);
2167         assert(idx < env->n_entries);
2168         env->entries[idx]->low_word  = new_rd_Mux(dbg, block, sel, false_l, true_l, mode);
2169         env->entries[idx]->high_word = new_rd_Mux(dbg, block, sel, false_h, true_h, mode);
2170 }  /* lower_Mux */
2171
2172 /**
2173  * Translate an ASM node.
2174  */
2175 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env)
2176 {
2177         ir_mode *his = env->params->high_signed;
2178         ir_mode *hiu = env->params->high_unsigned;
2179         int      i;
2180         ir_node *n;
2181
2182         (void)mode;
2183
2184         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2185                 ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
2186                 if (op_mode == his || op_mode == hiu) {
2187                         panic("lowering ASM unimplemented");
2188                 }  /* if */
2189         }  /* for */
2190
2191         for (n = asmn;;) {
2192                 ir_mode *proj_mode;
2193
2194                 n = get_irn_link(n);
2195                 if (n == NULL)
2196                         break;
2197
2198                 proj_mode = get_irn_mode(n);
2199                 if (proj_mode == his || proj_mode == hiu) {
2200                         panic("lowering ASM unimplemented");
2201                 }  /* if */
2202         }  /* for */
2203 }  /* lower_ASM */
2204
2205 /**
2206  * Translate a Sel node.
2207  */
2208 static void lower_Sel(ir_node *sel, ir_mode *mode, lower_env_t *env)
2209 {
2210         (void) mode;
2211
2212         /* we must only lower value parameter Sels if we change the
2213            value parameter type. */
2214         if (env->value_param_tp != NULL) {
2215                 ir_entity *ent = get_Sel_entity(sel);
2216             if (get_entity_owner(ent) == env->value_param_tp) {
2217                         int pos = PTR_TO_INT(get_entity_link(ent));
2218
2219                         ent = get_method_value_param_ent(env->l_mtp, pos);
2220                         set_Sel_entity(sel, ent);
2221                 }  /* if */
2222         }  /* if */
2223 }  /* lower_Sel */
2224
2225 /**
2226  * check for opcodes that must always be lowered.
2227  */
2228 static int always_lower(ir_opcode code)
2229 {
2230         switch (code) {
2231         case iro_ASM:
2232         case iro_Proj:
2233         case iro_Start:
2234         case iro_Call:
2235         case iro_Return:
2236         case iro_Cond:
2237         case iro_Conv:
2238         case iro_Sel:
2239                 return 1;
2240         default:
2241                 return 0;
2242         }  /* switch */
2243 }  /* always_lower */
2244
2245 /**
2246  * lower boolean Proj(Cmp)
2247  */
2248 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env)
2249 {
2250         int      lidx, ridx;
2251         ir_node  *l, *r, *low, *high, *t, *res;
2252         pn_Cmp   pnc;
2253         ir_node  *blk;
2254         dbg_info *db;
2255
2256         l    = get_Cmp_left(cmp);
2257         lidx = get_irn_idx(l);
2258         if (! env->entries[lidx]->low_word) {
2259                 /* still not ready */
2260                 return NULL;
2261         }  /* if */
2262
2263         r    = get_Cmp_right(cmp);
2264         ridx = get_irn_idx(r);
2265         if (! env->entries[ridx]->low_word) {
2266                 /* still not ready */
2267                 return NULL;
2268         }  /* if */
2269
2270         pnc  = get_Proj_proj(proj);
2271         blk  = get_nodes_block(cmp);
2272         db   = get_irn_dbg_info(cmp);
2273         low  = new_rd_Cmp(db, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2274         high = new_rd_Cmp(db, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2275
2276         if (pnc == pn_Cmp_Eq) {
2277                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2278                 res = new_rd_And(db, blk,
2279                         new_r_Proj(blk, low, mode_b, pnc),
2280                         new_r_Proj(blk, high, mode_b, pnc),
2281                         mode_b);
2282         } else if (pnc == pn_Cmp_Lg) {
2283                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2284                 res = new_rd_Or(db, blk,
2285                         new_r_Proj(blk, low, mode_b, pnc),
2286                         new_r_Proj(blk, high, mode_b, pnc),
2287                         mode_b);
2288         } else {
2289                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2290                 t = new_rd_And(db, blk,
2291                         new_r_Proj(blk, low, mode_b, pnc),
2292                         new_r_Proj(blk, high, mode_b, pn_Cmp_Eq),
2293                         mode_b);
2294                 res = new_rd_Or(db, blk,
2295                         new_r_Proj(blk, high, mode_b, pnc & ~pn_Cmp_Eq),
2296                         t,
2297                         mode_b);
2298         }  /* if */
2299         return res;
2300 }  /* lower_boolean_Proj_Cmp */
2301
2302 /**
2303  * The type of a lower function.
2304  *
2305  * @param node   the node to be lowered
2306  * @param mode   the low mode for the destination node
2307  * @param env    the lower environment
2308  */
2309 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2310
2311 /**
2312  * Lower a node.
2313  */
2314 static void lower_ops(ir_node *node, void *env)
2315 {
2316         lower_env_t  *lenv = env;
2317         node_entry_t *entry;
2318         int          idx = get_irn_idx(node);
2319         ir_mode      *mode = get_irn_mode(node);
2320
2321         if (mode == mode_b || is_Mux(node) || is_Conv(node)) {
2322                 int i;
2323
2324                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2325                         ir_node *proj = get_irn_n(node, i);
2326
2327                         if (is_Proj(proj)) {
2328                                 ir_node *cmp = get_Proj_pred(proj);
2329
2330                                 if (is_Cmp(cmp)) {
2331                                         ir_node *arg = get_Cmp_left(cmp);
2332
2333                                         mode = get_irn_mode(arg);
2334                                         if (mode == lenv->params->high_signed ||
2335                                                 mode == lenv->params->high_unsigned) {
2336                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2337
2338                                                 if (res == NULL) {
2339                                                         /* could not lower because predecessors not ready */
2340                                                         waitq_put(lenv->waitq, node);
2341                                                         return;
2342                                                 }  /* if */
2343                                                 set_irn_n(node, i, res);
2344                                         }  /* if */
2345                                 }  /* if */
2346                         }  /* if */
2347                 }  /* for */
2348         }  /* if */
2349
2350         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2351         if (entry || always_lower(get_irn_opcode(node))) {
2352                 ir_op      *op = get_irn_op(node);
2353                 lower_func func = (lower_func)op->ops.generic;
2354
2355                 if (func) {
2356                         mode = get_irn_op_mode(node);
2357
2358                         if (mode == lenv->params->high_signed)
2359                                 mode = lenv->params->low_signed;
2360                         else
2361                                 mode = lenv->params->low_unsigned;
2362
2363                         DB((dbg, LEVEL_1, "  %+F\n", node));
2364                         func(node, mode, lenv);
2365                 }  /* if */
2366         }  /* if */
2367 }  /* lower_ops */
2368
2369 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2370
2371 /**
2372  * Compare two op_mode_entry_t's.
2373  */
2374 static int cmp_op_mode(const void *elt, const void *key, size_t size)
2375 {
2376         const op_mode_entry_t *e1 = elt;
2377         const op_mode_entry_t *e2 = key;
2378         (void) size;
2379
2380         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2381 }  /* cmp_op_mode */
2382
2383 /**
2384  * Compare two conv_tp_entry_t's.
2385  */
2386 static int cmp_conv_tp(const void *elt, const void *key, size_t size)
2387 {
2388         const conv_tp_entry_t *e1 = elt;
2389         const conv_tp_entry_t *e2 = key;
2390         (void) size;
2391
2392         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2393 }  /* cmp_conv_tp */
2394
2395 /**
2396  * Enter a lowering function into an ir_op.
2397  */
2398 static void enter_lower_func(ir_op *op, lower_func func)
2399 {
2400         op->ops.generic = (op_func)func;
2401 }  /* enter_lower_func */
2402
2403 /**
2404  * Returns non-zero if a method type must be lowered.
2405  *
2406  * @param mtp  the method type
2407  */
2408 static int mtp_must_to_lowered(ir_type *mtp, lower_env_t *env)
2409 {
2410         int i, n_params;
2411
2412         n_params = get_method_n_params(mtp);
2413         if (n_params <= 0)
2414                 return 0;
2415
2416         /* first check if we have parameters that must be fixed */
2417         for (i = 0; i < n_params; ++i) {
2418                 ir_type *tp = get_method_param_type(mtp, i);
2419
2420                 if (is_Primitive_type(tp)) {
2421                         ir_mode *mode = get_type_mode(tp);
2422
2423                         if (mode == env->params->high_signed ||
2424                                 mode == env->params->high_unsigned)
2425                                 return 1;
2426                 }  /* if */
2427         }  /* for */
2428         return 0;
2429 }  /* mtp_must_to_lowered */
2430
2431 /*
2432  * Do the lowering.
2433  */
2434 void lower_dw_ops(const lwrdw_param_t *param)
2435 {
2436         lower_env_t lenv;
2437         int         i;
2438         ir_graph    *rem;
2439
2440         if (! param)
2441                 return;
2442
2443         if (! param->enable)
2444                 return;
2445
2446         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2447
2448         assert(2 * get_mode_size_bits(param->low_signed)   == get_mode_size_bits(param->high_signed));
2449         assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
2450         assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
2451
2452         /* create the necessary maps */
2453         if (! prim_types)
2454                 prim_types = pmap_create();
2455         if (! intrinsic_fkt)
2456                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2457         if (! conv_types)
2458                 conv_types = new_set(cmp_conv_tp, 16);
2459         if (! lowered_type)
2460                 lowered_type = pmap_create();
2461
2462         /* create a primitive unsigned and signed type */
2463         if (! tp_u)
2464                 tp_u = get_primitive_type(param->low_unsigned);
2465         if (! tp_s)
2466                 tp_s = get_primitive_type(param->low_signed);
2467
2468         /* create method types for the created binop calls */
2469         if (! binop_tp_u) {
2470                 binop_tp_u = new_type_method(4, 2);
2471                 set_method_param_type(binop_tp_u, 0, tp_u);
2472                 set_method_param_type(binop_tp_u, 1, tp_u);
2473                 set_method_param_type(binop_tp_u, 2, tp_u);
2474                 set_method_param_type(binop_tp_u, 3, tp_u);
2475                 set_method_res_type(binop_tp_u, 0, tp_u);
2476                 set_method_res_type(binop_tp_u, 1, tp_u);
2477         }  /* if */
2478         if (! binop_tp_s) {
2479                 binop_tp_s = new_type_method(4, 2);
2480                 set_method_param_type(binop_tp_s, 0, tp_u);
2481                 set_method_param_type(binop_tp_s, 1, tp_s);
2482                 set_method_param_type(binop_tp_s, 2, tp_u);
2483                 set_method_param_type(binop_tp_s, 3, tp_s);
2484                 set_method_res_type(binop_tp_s, 0, tp_u);
2485                 set_method_res_type(binop_tp_s, 1, tp_s);
2486         }  /* if */
2487         if (! shiftop_tp_u) {
2488                 shiftop_tp_u = new_type_method(3, 2);
2489                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2490                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2491                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2492                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2493                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2494         }  /* if */
2495         if (! shiftop_tp_s) {
2496                 shiftop_tp_s = new_type_method(3, 2);
2497                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2498                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2499                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2500                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2501                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2502         }  /* if */
2503         if (! unop_tp_u) {
2504                 unop_tp_u = new_type_method(2, 2);
2505                 set_method_param_type(unop_tp_u, 0, tp_u);
2506                 set_method_param_type(unop_tp_u, 1, tp_u);
2507                 set_method_res_type(unop_tp_u, 0, tp_u);
2508                 set_method_res_type(unop_tp_u, 1, tp_u);
2509         }  /* if */
2510         if (! unop_tp_s) {
2511                 unop_tp_s = new_type_method(2, 2);
2512                 set_method_param_type(unop_tp_s, 0, tp_u);
2513                 set_method_param_type(unop_tp_s, 1, tp_s);
2514                 set_method_res_type(unop_tp_s, 0, tp_u);
2515                 set_method_res_type(unop_tp_s, 1, tp_s);
2516         }  /* if */
2517
2518         lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), param->low_unsigned);
2519         lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), param->low_unsigned);
2520         lenv.waitq         = new_pdeq();
2521         lenv.params        = param;
2522         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
2523         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
2524
2525         /* first clear the generic function pointer for all ops */
2526         clear_irp_opcodes_generic_func();
2527
2528 #define LOWER2(op, fkt)   enter_lower_func(op_##op, fkt)
2529 #define LOWER(op)         LOWER2(op, lower_##op)
2530 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2531 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2532
2533         /* the table of all operations that must be lowered follows */
2534         LOWER(ASM);
2535         LOWER(Load);
2536         LOWER(Store);
2537         LOWER(Const);
2538         LOWER(And);
2539         LOWER(Or);
2540         LOWER(Eor);
2541         LOWER(Not);
2542         LOWER(Cond);
2543         LOWER(Return);
2544         LOWER(Call);
2545         LOWER(Unknown);
2546         LOWER(Phi);
2547         LOWER(Mux);
2548         LOWER(Start);
2549
2550         LOWER_BIN(Add);
2551         LOWER_BIN(Sub);
2552         LOWER_BIN(Mul);
2553         LOWER(Shl);
2554         LOWER(Shr);
2555         LOWER(Shrs);
2556         LOWER(Rotl);
2557         LOWER(DivMod);
2558         LOWER(Div);
2559         LOWER(Mod);
2560         LOWER(Sel);
2561         LOWER_UN(Abs);
2562         LOWER_UN(Minus);
2563
2564         LOWER(Conv);
2565
2566 #undef LOWER_UN
2567 #undef LOWER_BIN
2568 #undef LOWER
2569 #undef LOWER2
2570
2571         /* transform all graphs */
2572         rem = current_ir_graph;
2573         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2574                 ir_graph  *irg = get_irp_irg(i);
2575                 ir_entity *ent;
2576                 ir_type   *mtp;
2577                 int n_idx;
2578
2579                 obstack_init(&lenv.obst);
2580
2581                 n_idx = get_irg_last_idx(irg);
2582                 n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2583                 lenv.n_entries = n_idx;
2584                 lenv.entries   = NEW_ARR_F(node_entry_t *, n_idx);
2585                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2586
2587                 lenv.l_mtp        = NULL;
2588                 lenv.flags        = 0;
2589                 lenv.proj_2_block = pmap_create();
2590                 lenv.value_param_tp = NULL;
2591                 ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2592
2593                 ent = get_irg_entity(irg);
2594                 mtp = get_entity_type(ent);
2595
2596                 if (mtp_must_to_lowered(mtp, &lenv)) {
2597                         ir_type *ltp = lower_mtp(mtp, &lenv);
2598                         lenv.flags |= MUST_BE_LOWERED;
2599                         set_entity_type(ent, ltp);
2600                         lenv.l_mtp = ltp;
2601                         lenv.value_param_tp = get_method_value_param_type(mtp);
2602                 }  /* if */
2603
2604                 /* first step: link all nodes and allocate data */
2605                 irg_walk_graph(irg, firm_clear_node_and_phi_links, prepare_links_and_handle_rotl, &lenv);
2606
2607                 if (lenv.flags & MUST_BE_LOWERED) {
2608                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2609
2610                         /* must do some work */
2611                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2612
2613                         /* last step: all waiting nodes */
2614                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2615                         current_ir_graph = irg;
2616                         while (! pdeq_empty(lenv.waitq)) {
2617                                 ir_node *node = pdeq_getl(lenv.waitq);
2618
2619                                 lower_ops(node, &lenv);
2620                         }  /* while */
2621
2622                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2623
2624                         /* outs are invalid, we changed the graph */
2625                         set_irg_outs_inconsistent(irg);
2626
2627                         if (lenv.flags & CF_CHANGED) {
2628                                 /* control flow changed, dominance info is invalid */
2629                                 set_irg_doms_inconsistent(irg);
2630                                 set_irg_extblk_inconsistent(irg);
2631                                 set_irg_loopinfo_inconsistent(irg);
2632                         }  /* if */
2633                 } else {
2634                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2635                 }  /* if */
2636                 pmap_destroy(lenv.proj_2_block);
2637                 DEL_ARR_F(lenv.entries);
2638                 obstack_free(&lenv.obst, NULL);
2639         }  /* for */
2640         del_pdeq(lenv.waitq);
2641         current_ir_graph = rem;
2642 }  /* lower_dw_ops */
2643
2644 struct pass_t {
2645         ir_prog_pass_t      pass;
2646         const lwrdw_param_t *param;
2647 };
2648
2649 /**
2650  * Creates a wrapper around lower_dw_ops().
2651  */
2652 static int pass_wrapper(ir_prog *irp, void *context)
2653 {
2654         struct pass_t *pass = context;
2655
2656         (void)irp;
2657         lower_dw_ops(pass->param);
2658         return 0;
2659 }
2660
2661 ir_prog_pass_t *lower_dw_ops_pass(const char *name, const lwrdw_param_t *param)
2662 {
2663         struct pass_t *pass = XMALLOCZ(struct pass_t);
2664
2665         pass->param = param;
2666         return def_prog_pass_constructor(
2667                 &pass->pass, name ? name : "lower_dw", pass_wrapper);
2668 }  /* lower_dw_ops_pass */
2669
2670 /* Default implementation. */
2671 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2672                                     const ir_mode *imode, const ir_mode *omode,
2673                                     void *context)
2674 {
2675         char buf[64];
2676         ident *id;
2677         ir_entity *ent;
2678         (void) context;
2679
2680         if (imode == omode) {
2681                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2682         } else {
2683                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2684                         get_mode_name(imode), get_mode_name(omode));
2685         }  /* if */
2686         id = new_id_from_str(buf);
2687
2688         ent = new_entity(get_glob_type(), id, method);
2689         set_entity_ld_ident(ent, get_entity_ident(ent));
2690         return ent;
2691 }  /* def_create_intrinsic_fkt */