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