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

   1 /*
   2  * Copyright (C) 1995-2007 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 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #ifdef HAVE_STRING_H
  32 # include <string.h>
  33 #endif
  34 #ifdef HAVE_STDLIB_H
  35 # include <stdlib.h>
  36 #endif
  37
  38 #include <assert.h>
  39
  40 #include "lowering.h"
  41 #include "irnode_t.h"
  42 #include "irgraph_t.h"
  43 #include "irmode_t.h"
  44 #include "iropt_t.h"
  45 #include "irgmod.h"
  46 #include "tv_t.h"
  47 #include "dbginfo_t.h"
  48 #include "iropt_dbg.h"
  49 #include "irflag_t.h"
  50 #include "firmstat.h"
  51 #include "irgwalk.h"
  52 #include "ircons.h"
  53 #include "irflag.h"
  54 #include "irtools.h"
  55 #include "debug.h"
  56 #include "set.h"
  57 #include "pmap.h"
  58 #include "pdeq.h"
  59 #include "irdump.h"
  60 #include "xmalloc.h"
  61
  62 /** A map from mode to a primitive type. */
  63 static pmap *prim_types;
  64
  65 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  66 static set *intrinsic_fkt;
  67
  68 /** A map from (imode, omode) to conv function types. */
  69 static set *conv_types;
  70
  71 /** A map from a method type to its lowered type. */
  72 static pmap *lowered_type;
  73
  74 /** The types for the binop and unop intrinsics. */
  75 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;
  76
  77 /** the debug handle */
  78 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  79
  80 /**
  81  * An entry in the (op, imode, omode) -> entity map.
  82  */
  83 typedef struct _op_mode_entry {
  84         const ir_op   *op;    /**< the op */
  85         const ir_mode *imode; /**< the input mode */
  86         const ir_mode *omode; /**< the output mode */
  87         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  88 } op_mode_entry_t;
  89
  90 /**
  91  * An entry in the (imode, omode) -> tp map.
  92  */
  93 typedef struct _conv_tp_entry {
  94         const ir_mode *imode; /**< the input mode */
  95         const ir_mode *omode; /**< the output mode */
  96         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
  97 } conv_tp_entry_t;
  98
  99 /**
 100  * Every double word node will be replaced,
 101  * we need some store to hold the replacement:
 102  */
 103 typedef struct _node_entry_t {
 104         ir_node *low_word;    /**< the low word */
 105         ir_node *high_word;   /**< the high word */
 106 } node_entry_t;
 107
 108 enum lower_flags {
 109         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 110         CF_CHANGED      = 2,  /**< control flow was changed */
 111 };
 112
 113 /**
 114  * The lower environment.
 115  */
 116 typedef struct _lower_env_t {
 117         node_entry_t **entries;       /**< entries per node */
 118         struct obstack obst;          /**< an obstack holding the temporary data */
 119         tarval   *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 120         tarval   *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 121         pdeq     *waitq;              /**< a wait queue of all nodes that must be handled later */
 122         pmap     *proj_2_block;       /**< a map from ProjX to its destination blocks */
 123         const lwrdw_param_t *params;  /**< transformation parameter */
 124         unsigned flags;               /**< some flags */
 125         int      n_entries;           /**< number of entries */
 126 } lower_env_t;
 127
 128 /**
 129  * Get a primitive mode for a mode.
 130  */
 131 static ir_type *get_primitive_type(ir_mode *mode) {
 132         pmap_entry *entry = pmap_find(prim_types, mode);
 133         ir_type *tp;
 134         char buf[64];
 135
 136         if (entry)
 137                 return entry->value;
 138
 139         snprintf(buf, sizeof(buf), "_prim_%s", get_mode_name(mode));
 140         tp = new_type_primitive(new_id_from_str(buf), mode);
 141
 142         pmap_insert(prim_types, mode, tp);
 143         return tp;
 144 }  /* get_primitive_type */
 145
 146 /**
 147  * Create a method type for a Conv emulation from imode to omode.
 148  */
 149 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env) {
 150         conv_tp_entry_t key, *entry;
 151         ir_type *mtd;
 152
 153         key.imode = imode;
 154         key.omode = omode;
 155         key.mtd   = NULL;
 156
 157         entry = set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 158         if (! entry->mtd) {
 159                 int n_param = 1, n_res = 1;
 160                 char buf[64];
 161
 162                 if (imode == env->params->high_signed || imode == env->params->high_unsigned)
 163                         n_param = 2;
 164                 if (omode == env->params->high_signed || omode == env->params->high_unsigned)
 165                         n_res = 2;
 166
 167                 /* create a new one */
 168                 snprintf(buf, sizeof(buf), "LConv%s%s", get_mode_name(imode), get_mode_name(omode));
 169                 mtd = new_type_method(new_id_from_str(buf), n_param, n_res);
 170
 171                 /* set param types and result types */
 172                 n_param = 0;
 173                 if (imode == env->params->high_signed) {
 174                         set_method_param_type(mtd, n_param++, tp_u);
 175                         set_method_param_type(mtd, n_param++, tp_s);
 176                 } else if (imode == env->params->high_unsigned) {
 177                         set_method_param_type(mtd, n_param++, tp_u);
 178                         set_method_param_type(mtd, n_param++, tp_u);
 179                 } else {
 180                         ir_type *tp = get_primitive_type(imode);
 181                         set_method_param_type(mtd, n_param++, tp);
 182                 }  /* if */
 183
 184                 n_res = 0;
 185                 if (omode == env->params->high_signed) {
 186                         set_method_res_type(mtd, n_res++, tp_u);
 187                         set_method_res_type(mtd, n_res++, tp_s);
 188                 } else if (omode == env->params->high_unsigned) {
 189                         set_method_res_type(mtd, n_res++, tp_u);
 190                         set_method_res_type(mtd, n_res++, tp_u);
 191                 } else {
 192                         ir_type *tp = get_primitive_type(omode);
 193                         set_method_res_type(mtd, n_res++, tp);
 194                 }  /* if */
 195                 entry->mtd = mtd;
 196         } else {
 197                 mtd = entry->mtd;
 198         }  /* if */
 199         return mtd;
 200 }  /* get_conv_type */
 201
 202 /**
 203  * Add an additional control flow input to a block.
 204  * Patch all Phi nodes. The new Phi inputs are copied from
 205  * old input number nr.
 206  */
 207 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 208 {
 209         int i, arity = get_irn_arity(block);
 210         ir_node **in, *phi;
 211
 212         assert(nr < arity);
 213
 214         NEW_ARR_A(ir_node *, in, arity + 1);
 215         for (i = 0; i < arity; ++i)
 216                 in[i] = get_irn_n(block, i);
 217         in[i] = cf;
 218
 219         set_irn_in(block, i + 1, in);
 220
 221         for (phi = get_irn_link(block); phi; phi = get_irn_link(phi)) {
 222                 for (i = 0; i < arity; ++i)
 223                         in[i] = get_irn_n(phi, i);
 224                 in[i] = in[nr];
 225                 set_irn_in(phi, i + 1, in);
 226         }  /* for */
 227 }  /* add_block_cf_input_nr */
 228
 229 /**
 230  * Add an additional control flow input to a block.
 231  * Patch all Phi nodes. The new Phi inputs are copied from
 232  * old input from cf tmpl.
 233  */
 234 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 235 {
 236         int i, arity = get_irn_arity(block);
 237         int nr = 0;
 238
 239         for (i = 0; i < arity; ++i) {
 240                 if (get_irn_n(block, i) == tmpl) {
 241                         nr = i;
 242                         break;
 243                 }  /* if */
 244         }  /* for */
 245         assert(i < arity);
 246         add_block_cf_input_nr(block, nr, cf);
 247 }  /* add_block_cf_input */
 248
 249 /**
 250  * Return the "operational" mode of a Firm node.
 251  */
 252 static ir_mode *get_irn_op_mode(ir_node *node)
 253 {
 254         switch (get_irn_opcode(node)) {
 255         case iro_Load:
 256                 return get_Load_mode(node);
 257         case iro_Store:
 258                 return get_irn_mode(get_Store_value(node));
 259         case iro_DivMod:
 260                 return get_irn_mode(get_DivMod_left(node));
 261         case iro_Div:
 262                 return get_irn_mode(get_Div_left(node));
 263         case iro_Mod:
 264                 return get_irn_mode(get_Mod_left(node));
 265         case iro_Cmp:
 266                 return get_irn_mode(get_Cmp_left(node));
 267         default:
 268                 return get_irn_mode(node);
 269         }  /* switch */
 270 }  /* get_irn_op_mode */
 271
 272 /**
 273  * Walker, prepare the node links.
 274  */
 275 static void prepare_links(ir_node *node, void *env)
 276 {
 277         lower_env_t  *lenv = env;
 278         ir_mode      *mode = get_irn_op_mode(node);
 279         node_entry_t *link;
 280         int          i;
 281
 282         if (mode == lenv->params->high_signed ||
 283                 mode == lenv->params->high_unsigned) {
 284                 /* ok, found a node that will be lowered */
 285                 link = obstack_alloc(&lenv->obst, sizeof(*link));
 286
 287                 memset(link, 0, sizeof(*link));
 288
 289                 lenv->entries[get_irn_idx(node)] = link;
 290                 lenv->flags |= MUST_BE_LOWERED;
 291         } else if (get_irn_op(node) == op_Conv) {
 292                 /* Conv nodes have two modes */
 293                 ir_node *pred = get_Conv_op(node);
 294                 mode = get_irn_mode(pred);
 295
 296                 if (mode == lenv->params->high_signed ||
 297                         mode == lenv->params->high_unsigned) {
 298                         /* must lower this node either but don't need a link */
 299                         lenv->flags |= MUST_BE_LOWERED;
 300                 }  /* if */
 301                 return;
 302         }  /* if */
 303
 304         if (is_Proj(node)) {
 305                 /* link all Proj nodes to its predecessor:
 306                    Note that Tuple Proj's and its Projs are linked either. */
 307                 ir_node *pred = get_Proj_pred(node);
 308
 309                 set_irn_link(node, get_irn_link(pred));
 310                 set_irn_link(pred, node);
 311         } else if (is_Phi(node)) {
 312                 /* link all Phi nodes to its block */
 313                 ir_node *block = get_nodes_block(node);
 314
 315                 set_irn_link(node, get_irn_link(block));
 316                 set_irn_link(block, node);
 317         } else if (is_Block(node)) {
 318                 /* fill the Proj -> Block map */
 319                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 320                         ir_node *pred = get_Block_cfgpred(node, i);
 321
 322                         if (is_Proj(pred))
 323                                 pmap_insert(lenv->proj_2_block, pred, node);
 324                 }  /* for */
 325         }  /* if */
 326 }  /* prepare_links */
 327
 328 /**
 329  * Translate a Constant: create two.
 330  */
 331 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env) {
 332         tarval   *tv, *tv_l, *tv_h;
 333         ir_node  *low, *high;
 334         dbg_info *dbg = get_irn_dbg_info(node);
 335         ir_node  *block = get_nodes_block(node);
 336         int      idx;
 337         ir_graph *irg = current_ir_graph;
 338         ir_mode  *low_mode = env->params->low_unsigned;
 339
 340         tv   = get_Const_tarval(node);
 341
 342         tv_l = tarval_convert_to(tv, low_mode);
 343         low  = new_rd_Const(dbg, irg, block, low_mode, tv_l);
 344
 345         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 346         high = new_rd_Const(dbg, irg, block, mode, tv_h);
 347
 348         idx = get_irn_idx(node);
 349         assert(idx < env->n_entries);
 350         env->entries[idx]->low_word  = low;
 351         env->entries[idx]->high_word = high;
 352 }  /* lower_Const */
 353
 354 /**
 355  * Translate a Load: create two.
 356  */
 357 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env) {
 358         ir_mode  *low_mode = env->params->low_unsigned;
 359         ir_graph *irg = current_ir_graph;
 360         ir_node  *adr = get_Load_ptr(node);
 361         ir_node  *mem = get_Load_mem(node);
 362         ir_node  *low, *high, *proj;
 363         dbg_info *dbg;
 364         ir_node  *block = get_nodes_block(node);
 365         int      idx;
 366
 367         if (env->params->little_endian) {
 368                 low  = adr;
 369                 high = new_r_Add(irg, block, adr,
 370                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 371                         get_irn_mode(adr));
 372         } else {
 373                 low  = new_r_Add(irg, block, adr,
 374                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 375                         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, irg, block, mem,  low,  low_mode);
 382         proj = new_r_Proj(irg, block, low, mode_M, pn_Load_M);
 383         high = new_rd_Load(dbg, irg, block, proj, high, mode);
 384
 385         set_Load_volatility(low,  get_Load_volatility(node));
 386         set_Load_volatility(high, get_Load_volatility(node));
 387
 388         idx = get_irn_idx(node);
 389         assert(idx < env->n_entries);
 390         env->entries[idx]->low_word  = low;
 391         env->entries[idx]->high_word = high;
 392
 393         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 394                 idx = get_irn_idx(proj);
 395
 396                 switch (get_Proj_proj(proj)) {
 397                 case pn_Load_M:         /* Memory result. */
 398                         /* put it to the second one */
 399                         set_Proj_pred(proj, high);
 400                         break;
 401                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 402                         /* put it to the first one */
 403                         set_Proj_pred(proj, low);
 404                         break;
 405                 case pn_Load_res:       /* Result of load operation. */
 406                         assert(idx < env->n_entries);
 407                         env->entries[idx]->low_word  = new_r_Proj(irg, block, low,  low_mode, pn_Load_res);
 408                         env->entries[idx]->high_word = new_r_Proj(irg, block, high, mode,     pn_Load_res);
 409                         break;
 410                 default:
 411                         assert(0 && "unexpected Proj number");
 412                 }  /* switch */
 413                 /* mark this proj: we have handled it already, otherwise we might fall into
 414                  * out new nodes. */
 415                 mark_irn_visited(proj);
 416         }  /* for */
 417 }  /* lower_Load */
 418
 419 /**
 420  * Translate a Store: create two.
 421  */
 422 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env) {
 423         ir_graph *irg;
 424         ir_node  *block, *adr, *mem;
 425         ir_node  *low, *high, *irn, *proj;
 426         dbg_info *dbg;
 427         int      idx;
 428         node_entry_t *entry;
 429         (void) node;
 430         (void) mode;
 431
 432         irn = get_Store_value(node);
 433         entry = env->entries[get_irn_idx(irn)];
 434         assert(entry);
 435
 436         if (! entry->low_word) {
 437                 /* not ready yet, wait */
 438                 pdeq_putr(env->waitq, node);
 439                 return;
 440         }  /* if */
 441
 442         irg = current_ir_graph;
 443         adr = get_Store_ptr(node);
 444         mem = get_Store_mem(node);
 445         block = get_nodes_block(node);
 446
 447         if (env->params->little_endian) {
 448                 low  = adr;
 449                 high = new_r_Add(irg, block, adr,
 450                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 451                         get_irn_mode(adr));
 452         } else {
 453                 low  = new_r_Add(irg, block, adr,
 454                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 455                         get_irn_mode(adr));
 456                 high = adr;
 457         }  /* if */
 458
 459         /* create two Stores */
 460         dbg = get_irn_dbg_info(node);
 461         low  = new_rd_Store(dbg, irg, block, mem, low,  entry->low_word);
 462         proj = new_r_Proj(irg, block, low, mode_M, pn_Store_M);
 463         high = new_rd_Store(dbg, irg, block, proj, high, entry->high_word);
 464
 465         set_Store_volatility(low,  get_Store_volatility(node));
 466         set_Store_volatility(high, get_Store_volatility(node));
 467
 468         idx = get_irn_idx(node);
 469         assert(idx < env->n_entries);
 470         env->entries[idx]->low_word  = low;
 471         env->entries[idx]->high_word = high;
 472
 473         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 474                 idx = get_irn_idx(proj);
 475
 476                 switch (get_Proj_proj(proj)) {
 477                 case pn_Store_M:         /* Memory result. */
 478                         /* put it to the second one */
 479                         set_Proj_pred(proj, high);
 480                         break;
 481                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 482                         /* put it to the first one */
 483                         set_Proj_pred(proj, low);
 484                         break;
 485                 default:
 486                         assert(0 && "unexpected Proj number");
 487                 }  /* switch */
 488                 /* mark this proj: we have handled it already, otherwise we might fall into
 489                  * out new nodes. */
 490                 mark_irn_visited(proj);
 491         }  /* for */
 492 }  /* lower_Store */
 493
 494 /**
 495  * Return a node containing the address of the intrinsic emulation function.
 496  *
 497  * @param method  the method type of the emulation function
 498  * @param op      the emulated ir_op
 499  * @param imode   the input mode of the emulated opcode
 500  * @param omode   the output mode of the emulated opcode
 501  * @param block   where the new mode is created
 502  * @param env     the lower environment
 503  */
 504 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 505                                       ir_mode *imode, ir_mode *omode,
 506                                       ir_node *block, lower_env_t *env) {
 507         symconst_symbol sym;
 508         ir_entity *ent;
 509         op_mode_entry_t key, *entry;
 510
 511         key.op    = op;
 512         key.imode = imode;
 513         key.omode = omode;
 514         key.ent   = NULL;
 515
 516         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 517                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 518         if (! entry->ent) {
 519                 /* create a new one */
 520                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 521
 522                 assert(ent && "Intrinsic creator must return an entity");
 523                 entry->ent = ent;
 524         } else {
 525                 ent = entry->ent;
 526         }  /* if */
 527         sym.entity_p = ent;
 528         return new_r_SymConst(current_ir_graph, block, sym, symconst_addr_ent);
 529 }  /* get_intrinsic_address */
 530
 531 /**
 532  * Translate a Div.
 533  *
 534  * Create an intrinsic Call.
 535  */
 536 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env) {
 537         ir_node  *block, *irn, *call, *proj;
 538         ir_node  *in[4];
 539         ir_mode  *opmode;
 540         dbg_info *dbg;
 541         ir_type  *mtp;
 542         int      idx;
 543         ir_graph *irg;
 544         node_entry_t *entry;
 545
 546         irn   = get_Div_left(node);
 547         entry = env->entries[get_irn_idx(irn)];
 548         assert(entry);
 549
 550         if (! entry->low_word) {
 551                 /* not ready yet, wait */
 552                 pdeq_putr(env->waitq, node);
 553                 return;
 554         }  /* if */
 555
 556         in[0] = entry->low_word;
 557         in[1] = entry->high_word;
 558
 559         irn   = get_Div_right(node);
 560         entry = env->entries[get_irn_idx(irn)];
 561         assert(entry);
 562
 563         if (! entry->low_word) {
 564                 /* not ready yet, wait */
 565                 pdeq_putr(env->waitq, node);
 566                 return;
 567         }  /* if */
 568
 569         in[2] = entry->low_word;
 570         in[3] = entry->high_word;
 571
 572         dbg   = get_irn_dbg_info(node);
 573         block = get_nodes_block(node);
 574         irg   = current_ir_graph;
 575
 576         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 577         opmode = get_irn_op_mode(node);
 578         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, block, env);
 579         call = new_rd_Call(dbg, irg, block, get_Div_mem(node),
 580                 irn, 4, in, mtp);
 581         set_irn_pinned(call, get_irn_pinned(node));
 582         irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 583
 584         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 585                 switch (get_Proj_proj(proj)) {
 586                 case pn_Div_M:         /* Memory result. */
 587                         /* reroute to the call */
 588                         set_Proj_pred(proj, call);
 589                         set_Proj_proj(proj, pn_Call_M_except);
 590                         break;
 591                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 592                         /* reroute to the call */
 593                         set_Proj_pred(proj, call);
 594                         set_Proj_proj(proj, pn_Call_X_except);
 595                         break;
 596                 case pn_Div_res:       /* Result of computation. */
 597                         idx = get_irn_idx(proj);
 598                         assert(idx < env->n_entries);
 599                         env->entries[idx]->low_word  = new_r_Proj(current_ir_graph, block, irn, env->params->low_unsigned, 0);
 600                         env->entries[idx]->high_word = new_r_Proj(current_ir_graph, block, irn, mode,                      1);
 601                         break;
 602                 default:
 603                         assert(0 && "unexpected Proj number");
 604                 }  /* switch */
 605                 /* mark this proj: we have handled it already, otherwise we might fall into
 606                  * out new nodes. */
 607                 mark_irn_visited(proj);
 608         }  /* for */
 609 }  /* lower_Div */
 610
 611 /**
 612  * Translate a Mod.
 613  *
 614  * Create an intrinsic Call.
 615  */
 616 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 617         ir_node  *block, *proj, *irn, *call;
 618         ir_node  *in[4];
 619         ir_mode  *opmode;
 620         dbg_info *dbg;
 621         ir_type  *mtp;
 622         int      idx;
 623         ir_graph *irg;
 624         node_entry_t *entry;
 625
 626         irn   = get_Mod_left(node);
 627         entry = env->entries[get_irn_idx(irn)];
 628         assert(entry);
 629
 630         if (! entry->low_word) {
 631                 /* not ready yet, wait */
 632                 pdeq_putr(env->waitq, node);
 633                 return;
 634         }  /* if */
 635
 636         in[0] = entry->low_word;
 637         in[1] = entry->high_word;
 638
 639         irn   = get_Mod_right(node);
 640         entry = env->entries[get_irn_idx(irn)];
 641         assert(entry);
 642
 643         if (! entry->low_word) {
 644                 /* not ready yet, wait */
 645                 pdeq_putr(env->waitq, node);
 646                 return;
 647         }  /* if */
 648
 649         in[2] = entry->low_word;
 650         in[3] = entry->high_word;
 651
 652         dbg   = get_irn_dbg_info(node);
 653         block = get_nodes_block(node);
 654         irg   = current_ir_graph;
 655
 656         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 657         opmode = get_irn_op_mode(node);
 658         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, block, env);
 659         call = new_rd_Call(dbg, irg, block, get_Mod_mem(node),
 660                 irn, 4, in, mtp);
 661         set_irn_pinned(call, get_irn_pinned(node));
 662         irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 663
 664         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 665                 switch (get_Proj_proj(proj)) {
 666                 case pn_Mod_M:         /* Memory result. */
 667                         /* reroute to the call */
 668                         set_Proj_pred(proj, call);
 669                         set_Proj_proj(proj, pn_Call_M_except);
 670                         break;
 671                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 672                         /* reroute to the call */
 673                         set_Proj_pred(proj, call);
 674                         set_Proj_proj(proj, pn_Call_X_except);
 675                         break;
 676                 case pn_Mod_res:       /* Result of computation. */
 677                         idx = get_irn_idx(proj);
 678                         assert(idx < env->n_entries);
 679                         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
 680                         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
 681                         break;
 682                 default:
 683                         assert(0 && "unexpected Proj number");
 684                 }  /* switch */
 685                 /* mark this proj: we have handled it already, otherwise we might fall into
 686                  * out new nodes. */
 687                 mark_irn_visited(proj);
 688         }  /* for */
 689 }  /* lower_Mod */
 690
 691 /**
 692  * Translate a DivMod.
 693  *
 694  * Create two intrinsic Calls.
 695  */
 696 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 697         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod;
 698         ir_node  *resDiv = NULL;
 699         ir_node  *resMod = NULL;
 700         ir_node  *in[4];
 701         ir_mode  *opmode;
 702         dbg_info *dbg;
 703         ir_type  *mtp;
 704         int      idx;
 705         node_entry_t *entry;
 706         unsigned flags = 0;
 707         ir_graph *irg;
 708
 709         /* check if both results are needed */
 710         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 711                 switch (get_Proj_proj(proj)) {
 712                 case pn_DivMod_res_div: flags |= 1; break;
 713                 case pn_DivMod_res_mod: flags |= 2; break;
 714                 default: break;
 715                 }  /* switch */
 716         }  /* for */
 717
 718         irn   = get_DivMod_left(node);
 719         entry = env->entries[get_irn_idx(irn)];
 720         assert(entry);
 721
 722         if (! entry->low_word) {
 723                 /* not ready yet, wait */
 724                 pdeq_putr(env->waitq, node);
 725                 return;
 726         }  /* if */
 727
 728         in[0] = entry->low_word;
 729         in[1] = entry->high_word;
 730
 731         irn   = get_DivMod_right(node);
 732         entry = env->entries[get_irn_idx(irn)];
 733         assert(entry);
 734
 735         if (! entry->low_word) {
 736                 /* not ready yet, wait */
 737                 pdeq_putr(env->waitq, node);
 738                 return;
 739         }  /* if */
 740
 741         in[2] = entry->low_word;
 742         in[3] = entry->high_word;
 743
 744         dbg   = get_irn_dbg_info(node);
 745         block = get_nodes_block(node);
 746         irg   = current_ir_graph;
 747
 748         mem = get_DivMod_mem(node);
 749
 750         callDiv = callMod = NULL;
 751         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 752         if (flags & 1) {
 753                 opmode = get_irn_op_mode(node);
 754                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, block, env);
 755                 callDiv = new_rd_Call(dbg, irg, block, mem,
 756                         irn, 4, in, mtp);
 757                 set_irn_pinned(callDiv, get_irn_pinned(node));
 758                 resDiv = new_r_Proj(irg, block, callDiv, mode_T, pn_Call_T_result);
 759         }  /* if */
 760         if (flags & 2) {
 761                 if (flags & 1)
 762                         mem = new_r_Proj(irg, block, callDiv, mode_M, pn_Call_M);
 763                 opmode = get_irn_op_mode(node);
 764                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, block, env);
 765                 callMod = new_rd_Call(dbg, irg, block, mem,
 766                         irn, 4, in, mtp);
 767                 set_irn_pinned(callMod, get_irn_pinned(node));
 768                 resMod = new_r_Proj(irg, block, callMod, mode_T, pn_Call_T_result);
 769         }  /* if */
 770
 771         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 772                 switch (get_Proj_proj(proj)) {
 773                 case pn_DivMod_M:         /* Memory result. */
 774                         /* reroute to the first call */
 775                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 776                         set_Proj_proj(proj, pn_Call_M_except);
 777                         break;
 778                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 779                         /* reroute to the first call */
 780                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 781                         set_Proj_proj(proj, pn_Call_X_except);
 782                         break;
 783                 case pn_DivMod_res_div:   /* Result of Div. */
 784                         idx = get_irn_idx(proj);
 785                         assert(idx < env->n_entries);
 786                         env->entries[idx]->low_word  = new_r_Proj(irg, block, resDiv, env->params->low_unsigned, 0);
 787                         env->entries[idx]->high_word = new_r_Proj(irg, block, resDiv, mode,                      1);
 788                         break;
 789                 case pn_DivMod_res_mod:   /* Result of Mod. */
 790                         idx = get_irn_idx(proj);
 791                         env->entries[idx]->low_word  = new_r_Proj(irg, block, resMod, env->params->low_unsigned, 0);
 792                         env->entries[idx]->high_word = new_r_Proj(irg, block, resMod, mode,                      1);
 793                         break;
 794                 default:
 795                         assert(0 && "unexpected Proj number");
 796                 }  /* switch */
 797                 /* mark this proj: we have handled it already, otherwise we might fall into
 798                  * out new nodes. */
 799                 mark_irn_visited(proj);
 800         }  /* for */
 801 }  /* lower_DivMod */
 802
 803 /**
 804  * Translate a Binop.
 805  *
 806  * Create an intrinsic Call.
 807  */
 808 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 809         ir_node  *block, *irn;
 810         ir_node  *in[4];
 811         dbg_info *dbg;
 812         ir_type  *mtp;
 813         int      idx;
 814         ir_graph *irg;
 815         node_entry_t *entry;
 816
 817         irn   = get_binop_left(node);
 818         entry = env->entries[get_irn_idx(irn)];
 819         assert(entry);
 820
 821         if (! entry->low_word) {
 822                 /* not ready yet, wait */
 823                 pdeq_putr(env->waitq, node);
 824                 return;
 825         }  /* if */
 826
 827         in[0] = entry->low_word;
 828         in[1] = entry->high_word;
 829
 830         irn   = get_binop_right(node);
 831         entry = env->entries[get_irn_idx(irn)];
 832         assert(entry);
 833
 834         if (! entry->low_word) {
 835                 /* not ready yet, wait */
 836                 pdeq_putr(env->waitq, node);
 837                 return;
 838         }  /* if */
 839
 840         in[2] = entry->low_word;
 841         in[3] = entry->high_word;
 842
 843         dbg   = get_irn_dbg_info(node);
 844         block = get_nodes_block(node);
 845         irg   = current_ir_graph;
 846
 847         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 848         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
 849         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
 850                 irn, 4, in, mtp);
 851         set_irn_pinned(irn, get_irn_pinned(node));
 852         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
 853
 854         idx = get_irn_idx(node);
 855         assert(idx < env->n_entries);
 856         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
 857         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
 858 }  /* lower_Binop */
 859
 860 /**
 861  * Translate a Shiftop.
 862  *
 863  * Create an intrinsic Call.
 864  */
 865 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 866         ir_node  *block, *irn;
 867         ir_node  *in[3];
 868         dbg_info *dbg;
 869         ir_type  *mtp;
 870         int      idx;
 871         ir_graph *irg;
 872         node_entry_t *entry;
 873
 874         irn   = get_binop_left(node);
 875         entry = env->entries[get_irn_idx(irn)];
 876         assert(entry);
 877
 878         if (! entry->low_word) {
 879                 /* not ready yet, wait */
 880                 pdeq_putr(env->waitq, node);
 881                 return;
 882         }  /* if */
 883
 884         in[0] = entry->low_word;
 885         in[1] = entry->high_word;
 886
 887         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 888         in[2] = get_binop_right(node);
 889
 890         dbg   = get_irn_dbg_info(node);
 891         block = get_nodes_block(node);
 892         irg  = current_ir_graph;
 893
 894         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 895         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
 896         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
 897                 irn, 3, in, mtp);
 898         set_irn_pinned(irn, get_irn_pinned(node));
 899         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
 900
 901         idx = get_irn_idx(node);
 902         assert(idx < env->n_entries);
 903         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
 904         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
 905 }  /* lower_Shiftop */
 906
 907 /**
 908  * Translate a Shr and handle special cases.
 909  */
 910 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env) {
 911         ir_node  *right = get_Shr_right(node);
 912         ir_graph *irg = current_ir_graph;
 913
 914         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 915                 tarval *tv = get_Const_tarval(right);
 916
 917                 if (tarval_is_long(tv) &&
 918                         get_tarval_long(tv) >= get_mode_size_bits(mode)) {
 919                         ir_node *block = get_nodes_block(node);
 920                         ir_node *left = get_Shr_left(node);
 921                         ir_node *c;
 922                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 923                         int idx = get_irn_idx(left);
 924
 925                         left = env->entries[idx]->high_word;
 926                         idx = get_irn_idx(node);
 927
 928                         if (shf_cnt > 0) {
 929                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
 930                                 env->entries[idx]->low_word = new_r_Shr(irg, block, left, c, mode);
 931                         } else {
 932                                 env->entries[idx]->low_word = left;
 933                         }  /* if */
 934                         env->entries[idx]->high_word = new_r_Const(irg, block, mode, get_mode_null(mode));
 935
 936                         return;
 937                 }  /* if */
 938         }  /* if */
 939         lower_Shiftop(node, mode, env);
 940 }  /* lower_Shr */
 941
 942 /**
 943  * Translate a Shl and handle special cases.
 944  */
 945 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env) {
 946         ir_node  *right = get_Shl_right(node);
 947         ir_graph *irg = current_ir_graph;
 948
 949         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 950                 tarval *tv = get_Const_tarval(right);
 951
 952                 if (tarval_is_long(tv) &&
 953                         get_tarval_long(tv) >= get_mode_size_bits(mode)) {
 954                         ir_node *block = get_nodes_block(node);
 955                         ir_node *left = get_Shl_left(node);
 956                         ir_node *c;
 957                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 958                         int idx = get_irn_idx(left);
 959
 960                         left = env->entries[idx]->low_word;
 961                         idx = get_irn_idx(node);
 962
 963                         if (shf_cnt > 0) {
 964                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
 965                                 env->entries[idx]->high_word = new_r_Shl(irg, block, left, c, mode);
 966                         } else {
 967                                 env->entries[idx]->high_word = left;
 968                         }  /* if */
 969                         env->entries[idx]->low_word  = new_r_Const(irg, block, mode, get_mode_null(mode));
 970
 971                         return;
 972                 }  /* if */
 973         }  /* if */
 974         lower_Shiftop(node, mode, env);
 975 }  /* lower_Shl */
 976
 977 /**
 978  * Translate a Shrs and handle special cases.
 979  */
 980 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env) {
 981         ir_node  *right = get_Shrs_right(node);
 982         ir_graph *irg = current_ir_graph;
 983
 984         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 985                 tarval *tv = get_Const_tarval(right);
 986
 987                 if (tarval_is_long(tv) &&
 988                         get_tarval_long(tv) >= get_mode_size_bits(mode)) {
 989                         ir_node *block = get_nodes_block(node);
 990                         ir_node *left = get_Shrs_left(node);
 991                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 992                         ir_node *c;
 993                         int idx = get_irn_idx(left);
 994
 995                         left = env->entries[idx]->high_word;
 996                         idx = get_irn_idx(node);
 997
 998                         if (shf_cnt > 0) {
 999                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
1000                                 env->entries[idx]->low_word = new_r_Shrs(irg, block, left, c, mode);
1001                         } else {
1002                                 env->entries[idx]->low_word = left;
1003                         }  /* if */
1004                         c = new_r_Const_long(irg, block, mode_Iu, get_mode_size_bits(mode) - 1);
1005                         env->entries[idx]->high_word = new_r_Shrs(irg, block, left, c, mode);
1006
1007                         return;
1008                 }  /* if */
1009         }  /* if */
1010         lower_Shiftop(node, mode, env);
1011 }  /* lower_Shrs */
1012
1013 /**
1014  * Translate a Rot and handle special cases.
1015  */
1016 static void lower_Rot(ir_node *node, ir_mode *mode, lower_env_t *env) {
1017         ir_node  *right = get_Rot_right(node);
1018
1019         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1020                 tarval *tv = get_Const_tarval(right);
1021
1022                 if (tarval_is_long(tv) &&
1023                         get_tarval_long(tv) == get_mode_size_bits(mode)) {
1024                         ir_node *left = get_Rot_left(node);
1025                         ir_node *h, *l;
1026                         int idx = get_irn_idx(left);
1027
1028                         l = env->entries[idx]->low_word;
1029                         h = env->entries[idx]->high_word;
1030                         idx = get_irn_idx(node);
1031
1032                         env->entries[idx]->low_word  = h;
1033                         env->entries[idx]->high_word = l;
1034
1035                         return;
1036                 }  /* if */
1037         }  /* if */
1038         lower_Shiftop(node, mode, env);
1039 }  /* lower_Rot */
1040
1041 /**
1042  * Translate an Unop.
1043  *
1044  * Create an intrinsic Call.
1045  */
1046 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env) {
1047         ir_node  *block, *irn;
1048         ir_node  *in[2];
1049         dbg_info *dbg;
1050         ir_type  *mtp;
1051         int      idx;
1052         ir_graph *irg;
1053         node_entry_t *entry;
1054
1055         irn   = get_unop_op(node);
1056         entry = env->entries[get_irn_idx(irn)];
1057         assert(entry);
1058
1059         if (! entry->low_word) {
1060                 /* not ready yet, wait */
1061                 pdeq_putr(env->waitq, node);
1062                 return;
1063         }  /* if */
1064
1065         in[0] = entry->low_word;
1066         in[1] = entry->high_word;
1067
1068         dbg   = get_irn_dbg_info(node);
1069         block = get_nodes_block(node);
1070         irg   = current_ir_graph;
1071
1072         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1073         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
1074         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
1075                 irn, 2, in, mtp);
1076         set_irn_pinned(irn, get_irn_pinned(node));
1077         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
1078
1079         idx = get_irn_idx(node);
1080         assert(idx < env->n_entries);
1081         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
1082         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
1083 }  /* lower_Unop */
1084
1085 /**
1086  * Translate a logical Binop.
1087  *
1088  * Create two logical Binops.
1089  */
1090 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1091                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_graph *irg, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1092         ir_node  *block, *irn;
1093         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1094         dbg_info *dbg;
1095         int      idx;
1096         ir_graph *irg;
1097         node_entry_t *entry;
1098
1099         irn   = get_binop_left(node);
1100         entry = env->entries[get_irn_idx(irn)];
1101         assert(entry);
1102
1103         if (! entry->low_word) {
1104                 /* not ready yet, wait */
1105                 pdeq_putr(env->waitq, node);
1106                 return;
1107         }  /* if */
1108
1109         lop_l = entry->low_word;
1110         lop_h = entry->high_word;
1111
1112         irn   = get_binop_right(node);
1113         entry = env->entries[get_irn_idx(irn)];
1114         assert(entry);
1115
1116         if (! entry->low_word) {
1117                 /* not ready yet, wait */
1118                 pdeq_putr(env->waitq, node);
1119                 return;
1120         }  /* if */
1121
1122         rop_l = entry->low_word;
1123         rop_h = entry->high_word;
1124
1125         dbg = get_irn_dbg_info(node);
1126         block = get_nodes_block(node);
1127
1128         idx = get_irn_idx(node);
1129         assert(idx < env->n_entries);
1130         irg = current_ir_graph;
1131         env->entries[idx]->low_word  = constr_rd(dbg, irg, block, lop_l, rop_l, env->params->low_unsigned);
1132         env->entries[idx]->high_word = constr_rd(dbg, irg, block, lop_h, rop_h, mode);
1133 }  /* lower_Binop_logical */
1134
1135 /** create a logical operation tranformation */
1136 #define lower_logical(op)                                                \
1137 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1138         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1139 }
1140
1141 lower_logical(And)
1142 lower_logical(Or)
1143 lower_logical(Eor)
1144
1145 /**
1146  * Translate a Not.
1147  *
1148  * Create two logical Nots.
1149  */
1150 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env) {
1151         ir_node  *block, *irn;
1152         ir_node  *op_l, *op_h;
1153         dbg_info *dbg;
1154         int      idx;
1155         ir_graph *irg;
1156         node_entry_t *entry;
1157
1158         irn   = get_Not_op(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         op_l = entry->low_word;
1169         op_h = entry->high_word;
1170
1171         dbg   = get_irn_dbg_info(node);
1172         block = get_nodes_block(node);
1173         irg   = current_ir_graph;
1174
1175         idx = get_irn_idx(node);
1176         assert(idx < env->n_entries);
1177         env->entries[idx]->low_word  = new_rd_Not(dbg, current_ir_graph, block, op_l, env->params->low_unsigned);
1178         env->entries[idx]->high_word = new_rd_Not(dbg, current_ir_graph, block, op_h, mode);
1179 }  /* lower_Not */
1180
1181 /**
1182  * Translate a Cond.
1183  */
1184 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
1185         ir_node *cmp, *left, *right, *block;
1186         ir_node *sel = get_Cond_selector(node);
1187         ir_mode *m = get_irn_mode(sel);
1188         int     idx;
1189         (void) mode;
1190
1191         if (m == mode_b) {
1192                 node_entry_t *lentry, *rentry;
1193                 ir_node  *proj, *projT = NULL, *projF = NULL;
1194                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1195                 ir_node  *projHF, *projHT;
1196                 ir_node  *dst_blk;
1197                 ir_graph *irg;
1198                 pn_Cmp   pnc;
1199                 dbg_info *dbg;
1200
1201                 if(!is_Proj(sel))
1202                         return;
1203
1204                 cmp   = get_Proj_pred(sel);
1205                 if(!is_Cmp(cmp))
1206                         return;
1207
1208                 left  = get_Cmp_left(cmp);
1209                 idx   = get_irn_idx(left);
1210                 lentry = env->entries[idx];
1211
1212                 if (! lentry) {
1213                         /* a normal Cmp */
1214                         return;
1215                 }  /* if */
1216
1217                 right = get_Cmp_right(cmp);
1218                 idx   = get_irn_idx(right);
1219                 rentry = env->entries[idx];
1220                 assert(rentry);
1221
1222                 if (! lentry->low_word || !rentry->low_word) {
1223                         /* not yet ready */
1224                         pdeq_putr(env->waitq, node);
1225                         return;
1226                 }  /* if */
1227
1228                 /* all right, build the code */
1229                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1230                         long proj_nr = get_Proj_proj(proj);
1231
1232                         if (proj_nr == pn_Cond_true) {
1233                                 assert(projT == NULL && "more than one Proj(true)");
1234                                 projT = proj;
1235                         } else {
1236                                 assert(proj_nr == pn_Cond_false);
1237                                 assert(projF == NULL && "more than one Proj(false)");
1238                                 projF = proj;
1239                         }  /* if */
1240                         mark_irn_visited(proj);
1241                 }  /* for */
1242                 assert(projT && projF);
1243
1244                 /* create a new high compare */
1245                 block = get_nodes_block(cmp);
1246                 dbg   = get_irn_dbg_info(cmp);
1247                 irg   = current_ir_graph;
1248
1249                 cmpH = new_rd_Cmp(dbg, irg, block, lentry->high_word, rentry->high_word);
1250
1251                 pnc = get_Proj_proj(sel);
1252                 if (pnc == pn_Cmp_Eq) {
1253                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1254                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1255
1256                         assert(entry);
1257                         dst_blk = entry->value;
1258
1259                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Eq);
1260                         dbg = get_irn_dbg_info(node);
1261                         irn = new_rd_Cond(dbg, irg, block, irn);
1262
1263                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1264                         mark_irn_visited(projHF);
1265                         exchange(projF, projHF);
1266
1267                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1268                         mark_irn_visited(projHT);
1269
1270                         new_bl = new_r_Block(irg, 1, &projHT);
1271
1272                         dbg   = get_irn_dbg_info(cmp);
1273                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1274                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Eq);
1275                         dbg = get_irn_dbg_info(node);
1276                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1277
1278                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1279                         mark_irn_visited(proj);
1280                         add_block_cf_input(dst_blk, projHF, proj);
1281
1282                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1283                         mark_irn_visited(proj);
1284                         exchange(projT, proj);
1285                 } else if (pnc == pn_Cmp_Lg) {
1286                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1287                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1288
1289                         assert(entry);
1290                         dst_blk = entry->value;
1291
1292                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Lg);
1293                         dbg = get_irn_dbg_info(node);
1294                         irn = new_rd_Cond(dbg, irg, block, irn);
1295
1296                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1297                         mark_irn_visited(projHT);
1298                         exchange(projT, projHT);
1299
1300                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1301                         mark_irn_visited(projHF);
1302
1303                         new_bl = new_r_Block(irg, 1, &projHF);
1304
1305                         dbg   = get_irn_dbg_info(cmp);
1306                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1307                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Lg);
1308                         dbg = get_irn_dbg_info(node);
1309                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1310
1311                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1312                         mark_irn_visited(proj);
1313                         add_block_cf_input(dst_blk, projHT, proj);
1314
1315                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1316                         mark_irn_visited(proj);
1317                         exchange(projF, proj);
1318                 } else {
1319                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1320                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1321                         pmap_entry *entry;
1322
1323                         entry = pmap_find(env->proj_2_block, projT);
1324                         assert(entry);
1325                         dstT = entry->value;
1326
1327                         entry = pmap_find(env->proj_2_block, projF);
1328                         assert(entry);
1329                         dstF = entry->value;
1330
1331                         irn = new_r_Proj(irg, block, cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1332                         dbg = get_irn_dbg_info(node);
1333                         irn = new_rd_Cond(dbg, irg, block, irn);
1334
1335                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1336                         mark_irn_visited(projHT);
1337                         exchange(projT, projHT);
1338                         projT = projHT;
1339
1340                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1341                         mark_irn_visited(projHF);
1342
1343                         newbl_eq = new_r_Block(irg, 1, &projHF);
1344
1345                         irn = new_r_Proj(irg, newbl_eq, cmpH, mode_b, pn_Cmp_Eq);
1346                         irn = new_rd_Cond(dbg, irg, newbl_eq, irn);
1347
1348                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_false);
1349                         mark_irn_visited(proj);
1350                         exchange(projF, proj);
1351                         projF = proj;
1352
1353                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_true);
1354                         mark_irn_visited(proj);
1355
1356                         newbl_l = new_r_Block(irg, 1, &proj);
1357
1358                         dbg   = get_irn_dbg_info(cmp);
1359                         cmpL = new_rd_Cmp(dbg, irg, newbl_l, lentry->low_word, rentry->low_word);
1360                         irn = new_r_Proj(irg, newbl_l, cmpL, mode_b, pnc);
1361                         dbg = get_irn_dbg_info(node);
1362                         irn = new_rd_Cond(dbg, irg, newbl_l, irn);
1363
1364                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_true);
1365                         mark_irn_visited(proj);
1366                         add_block_cf_input(dstT, projT, proj);
1367
1368                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_false);
1369                         mark_irn_visited(proj);
1370                         add_block_cf_input(dstF, projF, proj);
1371                 }  /* if */
1372
1373                 /* we have changed the control flow */
1374                 env->flags |= CF_CHANGED;
1375         } else {
1376                 idx = get_irn_idx(sel);
1377
1378                 if (env->entries[idx]) {
1379                         /*
1380                            Bad, a jump-table with double-word index.
1381                            This should not happen, but if it does we handle
1382                            it like a Conv were between (in other words, ignore
1383                            the high part.
1384                          */
1385
1386                         if (! env->entries[idx]->low_word) {
1387                                 /* not ready yet, wait */
1388                                 pdeq_putr(env->waitq, node);
1389                                 return;
1390                         }  /* if */
1391                         set_Cond_selector(node, env->entries[idx]->low_word);
1392                 }  /* if */
1393         }  /* if */
1394 }  /* lower_Cond */
1395
1396 /**
1397  * Translate a Conv to higher_signed
1398  */
1399 static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
1400         ir_node  *op    = get_Conv_op(node);
1401         ir_mode  *imode = get_irn_mode(op);
1402         ir_mode  *dst_mode_l = env->params->low_unsigned;
1403         ir_mode  *dst_mode_h = env->params->low_signed;
1404         int      idx = get_irn_idx(node);
1405         ir_graph *irg = current_ir_graph;
1406         ir_node  *block = get_nodes_block(node);
1407         dbg_info *dbg = get_irn_dbg_info(node);
1408
1409         assert(idx < env->n_entries);
1410
1411         if (mode_is_int(imode) || mode_is_reference(imode)) {
1412                 if (imode == env->params->high_unsigned) {
1413                         /* a Conv from Lu to Ls */
1414                         int op_idx = get_irn_idx(op);
1415
1416                         if (! env->entries[op_idx]->low_word) {
1417                                 /* not ready yet, wait */
1418                                 pdeq_putr(env->waitq, node);
1419                                 return;
1420                         }  /* if */
1421                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word,  dst_mode_l);
1422                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode_h);
1423                 } else {
1424                         /* simple case: create a high word */
1425                         if (imode != dst_mode_l)
1426                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode_l);
1427
1428                         env->entries[idx]->low_word  = op;
1429
1430                         if (mode_is_signed(imode)) {
1431                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op,
1432                                         new_Const_long(mode_Iu, get_mode_size_bits(dst_mode_h) - 1), dst_mode_h);
1433                         } else {
1434                                 env->entries[idx]->high_word = new_Const(dst_mode_h, get_mode_null(dst_mode_h));
1435                         }  /* if */
1436                 }  /* if */
1437         } else {
1438                 ir_node *irn, *call;
1439                 ir_mode *omode = env->params->high_signed;
1440                 ir_type *mtp = get_conv_type(imode, omode, env);
1441
1442                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1443                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1444                 set_irn_pinned(call, get_irn_pinned(node));
1445                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1446
1447                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode_l, 0);
1448                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode_h, 1);
1449         }  /* if */
1450 }  /* lower_Conv_to_Ls */
1451
1452 /**
1453  * Translate a Conv to higher_unsigned
1454  */
1455 static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
1456         ir_node  *op    = get_Conv_op(node);
1457         ir_mode  *imode = get_irn_mode(op);
1458         ir_mode  *dst_mode = env->params->low_unsigned;
1459         int      idx = get_irn_idx(node);
1460         ir_graph *irg = current_ir_graph;
1461         ir_node  *block = get_nodes_block(node);
1462         dbg_info *dbg = get_irn_dbg_info(node);
1463
1464         assert(idx < env->n_entries);
1465
1466         if (mode_is_int(imode) || mode_is_reference(imode)) {
1467                 if (imode == env->params->high_signed) {
1468                         /* a Conv from Ls to Lu */
1469                         int op_idx = get_irn_idx(op);
1470
1471                         if (! env->entries[op_idx]->low_word) {
1472                                 /* not ready yet, wait */
1473                                 pdeq_putr(env->waitq, node);
1474                                 return;
1475                         }  /* if */
1476                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word, dst_mode);
1477                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode);
1478                 } else {
1479                         /* simple case: create a high word */
1480                         if (imode != dst_mode)
1481                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode);
1482
1483                         env->entries[idx]->low_word  = op;
1484
1485                         if (mode_is_signed(imode)) {
1486                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op,
1487                                         new_Const_long(mode_Iu, get_mode_size_bits(dst_mode) - 1), dst_mode);
1488                         } else {
1489                                 env->entries[idx]->high_word = new_Const(dst_mode, get_mode_null(dst_mode));
1490                         }  /* if */
1491                 }  /* if */
1492         } else {
1493                 ir_node *irn, *call;
1494                 ir_mode *omode = env->params->high_unsigned;
1495                 ir_type *mtp = get_conv_type(imode, omode, env);
1496
1497                 /* do an intrinsic call */
1498                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1499                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1500                 set_irn_pinned(call, get_irn_pinned(node));
1501                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1502
1503                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode, 0);
1504                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode, 1);
1505         }  /* if */
1506 }  /* lower_Conv_to_Lu */
1507
1508 /**
1509  * Translate a Conv from higher_signed
1510  */
1511 static void lower_Conv_from_Ls(ir_node *node, lower_env_t *env) {
1512         ir_node  *op    = get_Conv_op(node);
1513         ir_mode  *omode = get_irn_mode(node);
1514         ir_node  *block = get_nodes_block(node);
1515         dbg_info *dbg = get_irn_dbg_info(node);
1516         int      idx = get_irn_idx(op);
1517         ir_graph *irg = current_ir_graph;
1518
1519         assert(idx < env->n_entries);
1520
1521         if (! env->entries[idx]->low_word) {
1522                 /* not ready yet, wait */
1523                 pdeq_putr(env->waitq, node);
1524                 return;
1525         }  /* if */
1526
1527         if (mode_is_int(omode) || mode_is_reference(omode)) {
1528                 op = env->entries[idx]->low_word;
1529
1530                 /* simple case: create a high word */
1531                 if (omode != env->params->low_signed)
1532                         op = new_rd_Conv(dbg, irg, block, op, omode);
1533
1534                 set_Conv_op(node, op);
1535         } else {
1536                 ir_node *irn, *call, *in[2];
1537                 ir_mode *imode = env->params->high_signed;
1538                 ir_type *mtp = get_conv_type(imode, omode, env);
1539
1540                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1541                 in[0] = env->entries[idx]->low_word;
1542                 in[1] = env->entries[idx]->high_word;
1543
1544                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1545                 set_irn_pinned(call, get_irn_pinned(node));
1546                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1547
1548                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1549         }  /* if */
1550 }  /* lower_Conv_from_Ls */
1551
1552 /**
1553  * Translate a Conv from higher_unsigned
1554  */
1555 static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
1556         ir_node  *op    = get_Conv_op(node);
1557         ir_mode  *omode = get_irn_mode(node);
1558         ir_node  *block = get_nodes_block(node);
1559         dbg_info *dbg = get_irn_dbg_info(node);
1560         int      idx = get_irn_idx(op);
1561         ir_graph *irg = current_ir_graph;
1562
1563         assert(idx < env->n_entries);
1564
1565         if (! env->entries[idx]->low_word) {
1566                 /* not ready yet, wait */
1567                 pdeq_putr(env->waitq, node);
1568                 return;
1569         }  /* if */
1570
1571         if (mode_is_int(omode) || mode_is_reference(omode)) {
1572                 op = env->entries[idx]->low_word;
1573
1574                 /* simple case: create a high word */
1575                 if (omode != env->params->low_unsigned)
1576                         op = new_rd_Conv(dbg, irg, block, op, omode);
1577
1578                 set_Conv_op(node, op);
1579         } else {
1580                 ir_node *irn, *call, *in[2];
1581                 ir_mode *imode = env->params->high_unsigned;
1582                 ir_type *mtp = get_conv_type(imode, omode, env);
1583
1584                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1585                 in[0] = env->entries[idx]->low_word;
1586                 in[1] = env->entries[idx]->high_word;
1587
1588                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1589                 set_irn_pinned(call, get_irn_pinned(node));
1590                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1591
1592                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1593         }  /* if */
1594 }  /* lower_Conv_from_Lu */
1595
1596 /**
1597  * Translate a Conv.
1598  */
1599 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env) {
1600         mode = get_irn_mode(node);
1601
1602         if (mode == env->params->high_signed) {
1603                 lower_Conv_to_Ls(node, env);
1604         } else if (mode == env->params->high_unsigned) {
1605                 lower_Conv_to_Lu(node, env);
1606         } else {
1607                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1608
1609                 if (mode == env->params->high_signed) {
1610                         lower_Conv_from_Ls(node, env);
1611                 } else if (mode == env->params->high_unsigned) {
1612                         lower_Conv_from_Lu(node, env);
1613                 }  /* if */
1614         }  /* if */
1615 }  /* lower_Conv */
1616
1617 /**
1618  * Lower the method type.
1619  */
1620 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
1621         pmap_entry *entry;
1622         ident      *id;
1623         ir_type    *res;
1624
1625         if (is_lowered_type(mtp))
1626                 return mtp;
1627
1628         entry = pmap_find(lowered_type, mtp);
1629         if (! entry) {
1630                 int i, n, r, n_param, n_res;
1631
1632                 /* count new number of params */
1633                 n_param = n = get_method_n_params(mtp);
1634                 for (i = n_param - 1; i >= 0; --i) {
1635                         ir_type *tp = get_method_param_type(mtp, i);
1636
1637                         if (is_Primitive_type(tp)) {
1638                                 ir_mode *mode = get_type_mode(tp);
1639
1640                                 if (mode == env->params->high_signed ||
1641                                         mode == env->params->high_unsigned)
1642                                         ++n_param;
1643                         }  /* if */
1644                 }  /* for */
1645
1646                 /* count new number of results */
1647                 n_res = r = get_method_n_ress(mtp);
1648                 for (i = n_res - 1; i >= 0; --i) {
1649                         ir_type *tp = get_method_res_type(mtp, i);
1650
1651                         if (is_Primitive_type(tp)) {
1652                                 ir_mode *mode = get_type_mode(tp);
1653
1654                                 if (mode == env->params->high_signed ||
1655                                         mode == env->params->high_unsigned)
1656                                         ++n_res;
1657                         }  /* if */
1658                 }  /* for */
1659
1660                 id = mangle_u(new_id_from_chars("L", 1), get_type_ident(mtp));
1661                 res = new_type_method(id, n_param, n_res);
1662
1663                 /* set param types and result types */
1664                 for (i = n_param = 0; i < n; ++i) {
1665                         ir_type *tp = get_method_param_type(mtp, i);
1666
1667                         if (is_Primitive_type(tp)) {
1668                                 ir_mode *mode = get_type_mode(tp);
1669
1670                                 if (mode == env->params->high_signed) {
1671                                         set_method_param_type(res, n_param++, tp_u);
1672                                         set_method_param_type(res, n_param++, tp_s);
1673                                 } else if (mode == env->params->high_unsigned) {
1674                                         set_method_param_type(res, n_param++, tp_u);
1675                                         set_method_param_type(res, n_param++, tp_u);
1676                                 } else {
1677                                         set_method_param_type(res, n_param++, tp);
1678                                 }  /* if */
1679                         } else {
1680                                 set_method_param_type(res, n_param++, tp);
1681                         }  /* if */
1682                 }  /* for */
1683                 for (i = n_res = 0; i < r; ++i) {
1684                         ir_type *tp = get_method_res_type(mtp, i);
1685
1686                         if (is_Primitive_type(tp)) {
1687                                 ir_mode *mode = get_type_mode(tp);
1688
1689                                 if (mode == env->params->high_signed) {
1690                                         set_method_res_type(res, n_res++, tp_u);
1691                                         set_method_res_type(res, n_res++, tp_s);
1692                                 } else if (mode == env->params->high_unsigned) {
1693                                         set_method_res_type(res, n_res++, tp_u);
1694                                         set_method_res_type(res, n_res++, tp_u);
1695                                 } else {
1696                                         set_method_res_type(res, n_res++, tp);
1697                                 }  /* if */
1698                         } else {
1699                                 set_method_res_type(res, n_res++, tp);
1700                         }  /* if */
1701                 }  /* for */
1702                 set_lowered_type(mtp, res);
1703                 pmap_insert(lowered_type, mtp, res);
1704         } else {
1705                 res = entry->value;
1706         }  /* if */
1707         return res;
1708 }  /* lower_mtp */
1709
1710 /**
1711  * Translate a Return.
1712  */
1713 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
1714         ir_graph  *irg = current_ir_graph;
1715         ir_entity *ent = get_irg_entity(irg);
1716         ir_type   *mtp = get_entity_type(ent);
1717         ir_node   **in;
1718         int       i, j, n, idx;
1719         int       need_conv = 0;
1720         (void) mode;
1721
1722         /* check if this return must be lowered */
1723         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1724                 ir_node *pred = get_Return_res(node, i);
1725                 ir_mode *mode = get_irn_op_mode(pred);
1726
1727                 if (mode == env->params->high_signed ||
1728                         mode == env->params->high_unsigned) {
1729                         idx = get_irn_idx(pred);
1730                         if (! env->entries[idx]->low_word) {
1731                                 /* not ready yet, wait */
1732                                 pdeq_putr(env->waitq, node);
1733                                 return;
1734                         }  /* if */
1735                         need_conv = 1;
1736                 }  /* if */
1737         }  /* for */
1738         if (! need_conv)
1739                 return;
1740
1741         ent = get_irg_entity(irg);
1742         mtp = get_entity_type(ent);
1743
1744         mtp = lower_mtp(mtp, env);
1745         set_entity_type(ent, mtp);
1746
1747         /* create a new in array */
1748         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1749         in[0] = get_Return_mem(node);
1750
1751         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1752                 ir_node *pred = get_Return_res(node, i);
1753
1754                 idx = get_irn_idx(pred);
1755                 assert(idx < env->n_entries);
1756
1757                 if (env->entries[idx]) {
1758                         in[++j] = env->entries[idx]->low_word;
1759                         in[++j] = env->entries[idx]->high_word;
1760                 } else {
1761                         in[++j] = pred;
1762                 }  /* if */
1763         }  /* for */
1764
1765         set_irn_in(node, j+1, in);
1766 }  /* lower_Return */
1767
1768 /**
1769  * Translate the parameters.
1770  */
1771 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env) {
1772         ir_graph  *irg = current_ir_graph;
1773         ir_entity *ent = get_irg_entity(irg);
1774         ir_type   *tp  = get_entity_type(ent);
1775         ir_type   *mtp;
1776         long      *new_projs;
1777         int       i, j, n_params, rem;
1778         ir_node   *proj, *args;
1779         (void) mode;
1780
1781         if (is_lowered_type(tp)) {
1782                 mtp = get_associated_type(tp);
1783         } else {
1784                 mtp = tp;
1785         }  /* if */
1786         assert(! is_lowered_type(mtp));
1787
1788         n_params = get_method_n_params(mtp);
1789         if (n_params <= 0)
1790                 return;
1791
1792         NEW_ARR_A(long, new_projs, n_params);
1793
1794         /* first check if we have parameters that must be fixed */
1795         for (i = j = 0; i < n_params; ++i, ++j) {
1796                 ir_type *tp = get_method_param_type(mtp, i);
1797
1798                 new_projs[i] = j;
1799                 if (is_Primitive_type(tp)) {
1800                         ir_mode *mode = get_type_mode(tp);
1801
1802                         if (mode == env->params->high_signed ||
1803                                 mode == env->params->high_unsigned)
1804                                 ++j;
1805                 }  /* if */
1806         }  /* for */
1807         if (i == j)
1808                 return;
1809
1810         mtp = lower_mtp(mtp, env);
1811         set_entity_type(ent, mtp);
1812
1813         /* switch off optimization for new Proj nodes or they might be CSE'ed
1814            with not patched one's */
1815         rem = get_optimize();
1816         set_optimize(0);
1817
1818         /* ok, fix all Proj's and create new ones */
1819         args = get_irg_args(irg);
1820         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1821                 ir_node *pred = get_Proj_pred(proj);
1822                 long proj_nr;
1823                 int idx;
1824                 ir_mode *mode;
1825                 dbg_info *dbg;
1826
1827                 /* do not visit this node again */
1828                 mark_irn_visited(proj);
1829
1830                 if (pred != args)
1831                         continue;
1832
1833                 proj_nr = get_Proj_proj(proj);
1834                 set_Proj_proj(proj, new_projs[proj_nr]);
1835
1836                 idx = get_irn_idx(proj);
1837                 if (env->entries[idx]) {
1838                         ir_mode *low_mode = env->params->low_unsigned;
1839
1840                         mode = get_irn_mode(proj);
1841
1842                         if (mode == env->params->high_signed) {
1843                                 mode = env->params->low_signed;
1844                         } else {
1845                                 mode = env->params->low_unsigned;
1846                         }  /* if */
1847
1848                         dbg = get_irn_dbg_info(proj);
1849                         env->entries[idx]->low_word  =
1850                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, low_mode, new_projs[proj_nr]);
1851                         env->entries[idx]->high_word =
1852                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, mode, new_projs[proj_nr] + 1);
1853                 }  /* if */
1854         }  /* for */
1855         set_optimize(rem);
1856 }  /* lower_Start */
1857
1858 /**
1859  * Translate a Call.
1860  */
1861 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
1862         ir_graph *irg = current_ir_graph;
1863         ir_type  *tp = get_Call_type(node);
1864         ir_type  *call_tp;
1865         ir_node  **in, *proj, *results;
1866         int      n_params, n_res, need_lower = 0;
1867         int      i, j;
1868         long     *res_numbers = NULL;
1869         (void) mode;
1870
1871         if (is_lowered_type(tp)) {
1872                 call_tp = get_associated_type(tp);
1873         } else {
1874                 call_tp = tp;
1875         }  /* if */
1876
1877         assert(! is_lowered_type(call_tp));
1878
1879         n_params = get_method_n_params(call_tp);
1880         for (i = 0; i < n_params; ++i) {
1881                 ir_type *tp = get_method_param_type(call_tp, i);
1882
1883                 if (is_Primitive_type(tp)) {
1884                         ir_mode *mode = get_type_mode(tp);
1885
1886                         if (mode == env->params->high_signed ||
1887                                 mode == env->params->high_unsigned) {
1888                                 need_lower = 1;
1889                                 break;
1890                         }  /* if */
1891                 }  /* if */
1892         }  /* for */
1893         n_res = get_method_n_ress(call_tp);
1894         if (n_res > 0) {
1895                 NEW_ARR_A(long, res_numbers, n_res);
1896
1897                 for (i = j = 0; i < n_res; ++i, ++j) {
1898                         ir_type *tp = get_method_res_type(call_tp, i);
1899
1900                         res_numbers[i] = j;
1901                         if (is_Primitive_type(tp)) {
1902                                 ir_mode *mode = get_type_mode(tp);
1903
1904                                 if (mode == env->params->high_signed ||
1905                                         mode == env->params->high_unsigned) {
1906                                         need_lower = 1;
1907                                         ++j;
1908                                 }  /* if */
1909                         }  /* if */
1910                 }  /* for */
1911         }  /* if */
1912
1913         if (! need_lower)
1914                 return;
1915
1916         /* let's lower it */
1917         call_tp = lower_mtp(call_tp, env);
1918         set_Call_type(node, call_tp);
1919
1920         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1921
1922         in[0] = get_Call_mem(node);
1923         in[1] = get_Call_ptr(node);
1924
1925         for (j = 2, i = 0; i < n_params; ++i) {
1926                 ir_node *pred = get_Call_param(node, i);
1927                 int     idx = get_irn_idx(pred);
1928
1929                 if (env->entries[idx]) {
1930                         if (! env->entries[idx]->low_word) {
1931                                 /* not ready yet, wait */
1932                                 pdeq_putr(env->waitq, node);
1933                                 return;
1934                         }
1935                         in[j++] = env->entries[idx]->low_word;
1936                         in[j++] = env->entries[idx]->high_word;
1937                 } else {
1938                         in[j++] = pred;
1939                 }  /* if */
1940         }  /* for */
1941
1942         set_irn_in(node, j, in);
1943
1944         /* fix the results */
1945         results = NULL;
1946         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1947                 long proj_nr = get_Proj_proj(proj);
1948
1949                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
1950                         /* found the result proj */
1951                         results = proj;
1952                         break;
1953                 }  /* if */
1954         }  /* for */
1955
1956         if (results) {          /* there are results */
1957                 int rem = get_optimize();
1958
1959                 /* switch off optimization for new Proj nodes or they might be CSE'ed
1960                    with not patched one's */
1961                 set_optimize(0);
1962                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
1963                         if (get_Proj_pred(proj) == results) {
1964                                 long proj_nr = get_Proj_proj(proj);
1965                                 int idx;
1966
1967                                 /* found a result */
1968                                 set_Proj_proj(proj, res_numbers[proj_nr]);
1969                                 idx = get_irn_idx(proj);
1970                                 if (env->entries[idx]) {
1971                                         ir_mode *mode = get_irn_mode(proj);
1972                                         ir_mode *low_mode = env->params->low_unsigned;
1973                                         dbg_info *dbg;
1974
1975                                         if (mode == env->params->high_signed) {
1976                                                 mode = env->params->low_signed;
1977                                         } else {
1978                                                 mode = env->params->low_unsigned;
1979                                         }  /* if */
1980
1981                                         dbg = get_irn_dbg_info(proj);
1982                                         env->entries[idx]->low_word  =
1983                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, low_mode, res_numbers[proj_nr]);
1984                                         env->entries[idx]->high_word =
1985                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, mode, res_numbers[proj_nr] + 1);
1986                                 }  /* if */
1987                                 mark_irn_visited(proj);
1988                         }  /* if */
1989                 }  /* for */
1990                 set_optimize(rem);
1991         }
1992 }  /* lower_Call */
1993
1994 /**
1995  * Translate an Unknown into two.
1996  */
1997 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env) {
1998         int idx = get_irn_idx(node);
1999         ir_graph *irg = current_ir_graph;
2000
2001         env->entries[idx]->low_word  =
2002         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2003 }  /* lower_Unknown */
2004
2005 /**
2006  * Translate a Phi.
2007  *
2008  * First step: just create two templates
2009  */
2010 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
2011         ir_mode  *mode_l = env->params->low_unsigned;
2012         ir_graph *irg = current_ir_graph;
2013         ir_node  *block;
2014         ir_node  *unk_l;
2015         ir_node  *unk_h;
2016         ir_node  **inl, **inh;
2017         dbg_info *dbg;
2018         int      idx, i, arity = get_Phi_n_preds(phi);
2019         int      enq = 0;
2020
2021         idx = get_irn_idx(phi);
2022         if (env->entries[idx]->low_word) {
2023                 /* Phi nodes already build, check for inputs */
2024                 ir_node *phil = env->entries[idx]->low_word;
2025                 ir_node *phih = env->entries[idx]->high_word;
2026
2027                 for (i = 0; i < arity; ++i) {
2028                         ir_node *pred = get_Phi_pred(phi, i);
2029                         int     idx = get_irn_idx(pred);
2030
2031                         if (env->entries[idx]->low_word) {
2032                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2033                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2034                         } else {
2035                                 /* still not ready */
2036                                 pdeq_putr(env->waitq, phi);
2037                                 return;
2038                         }  /* if */
2039                 }  /* for */
2040         }  /* if */
2041
2042         /* first create a new in array */
2043         NEW_ARR_A(ir_node *, inl, arity);
2044         NEW_ARR_A(ir_node *, inh, arity);
2045         unk_l = new_r_Unknown(irg, mode_l);
2046         unk_h = new_r_Unknown(irg, mode);
2047
2048         for (i = 0; i < arity; ++i) {
2049                 ir_node *pred = get_Phi_pred(phi, i);
2050                 int     idx = get_irn_idx(pred);
2051
2052                 if (env->entries[idx]->low_word) {
2053                         inl[i] = env->entries[idx]->low_word;
2054                         inh[i] = env->entries[idx]->high_word;
2055                 } else {
2056                         inl[i] = unk_l;
2057                         inh[i] = unk_h;
2058                         enq = 1;
2059                 }  /* if */
2060         }  /* for */
2061
2062         dbg   = get_irn_dbg_info(phi);
2063         block = get_nodes_block(phi);
2064
2065         idx = get_irn_idx(phi);
2066         assert(idx < env->n_entries);
2067         env->entries[idx]->low_word  = new_rd_Phi(dbg, irg, block, arity, inl, mode_l);
2068         env->entries[idx]->high_word = new_rd_Phi(dbg, irg, block, arity, inh, mode);
2069
2070         if (enq) {
2071                 /* not yet finished */
2072                 pdeq_putr(env->waitq, phi);
2073         }  /* if */
2074 }  /* lower_Phi */
2075
2076 /**
2077  * Translate a Psi.
2078  */
2079 static void lower_Psi(ir_node *psi, ir_mode *mode, lower_env_t *env) {
2080         ir_graph *irg = current_ir_graph;
2081         ir_node  *block, *val;
2082         ir_node  **valsl, **valsh, **conds;
2083         dbg_info *dbg;
2084         int      idx, i, n_conds = get_Psi_n_conds(psi);
2085
2086         /* first create a new in array */
2087         NEW_ARR_A(ir_node *, valsl, n_conds + 1);
2088         NEW_ARR_A(ir_node *, valsh, n_conds + 1);
2089
2090         for (i = 0; i < n_conds; ++i) {
2091                 val = get_Psi_val(psi, i);
2092                 idx = get_irn_idx(val);
2093                 if (env->entries[idx]->low_word) {
2094                         /* Values already build */
2095                         valsl[i] = env->entries[idx]->low_word;
2096                         valsh[i] = env->entries[idx]->high_word;
2097                 } else {
2098                         /* still not ready */
2099                         pdeq_putr(env->waitq, psi);
2100                         return;
2101                 }  /* if */
2102         }  /* for */
2103         val = get_Psi_default(psi);
2104         idx = get_irn_idx(val);
2105         if (env->entries[idx]->low_word) {
2106                 /* Values already build */
2107                 valsl[i] = env->entries[idx]->low_word;
2108                 valsh[i] = env->entries[idx]->high_word;
2109         } else {
2110                 /* still not ready */
2111                 pdeq_putr(env->waitq, psi);
2112                 return;
2113         }  /* if */
2114
2115
2116         NEW_ARR_A(ir_node *, conds, n_conds);
2117         for (i = 0; i < n_conds; ++i) {
2118                 conds[i] = get_Psi_cond(psi, i);
2119         }  /* for */
2120
2121         dbg   = get_irn_dbg_info(psi);
2122         block = get_nodes_block(psi);
2123
2124         idx = get_irn_idx(psi);
2125         assert(idx < env->n_entries);
2126         env->entries[idx]->low_word  = new_rd_Psi(dbg, irg, block, n_conds, conds, valsl, mode);
2127         env->entries[idx]->high_word = new_rd_Psi(dbg, irg, block, n_conds, conds, valsh, mode);
2128 }  /* lower_Psi */
2129
2130 /**
2131  * check for opcodes that must always be lowered.
2132  */
2133 static int always_lower(ir_opcode code) {
2134         switch (code) {
2135         case iro_Proj:
2136         case iro_Start:
2137         case iro_Call:
2138         case iro_Return:
2139         case iro_Cond:
2140         case iro_Conv:
2141                 return 1;
2142         default:
2143                 return 0;
2144         }  /* switch */
2145 }  /* always_lower */
2146
2147 /**
2148  * lower boolean Proj(Cmp)
2149  */
2150 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env) {
2151         int      lidx, ridx;
2152         ir_node  *l, *r, *low, *high, *t, *res;
2153         pn_Cmp   pnc;
2154         ir_node  *blk;
2155         ir_graph *irg = current_ir_graph;
2156         dbg_info *db;
2157
2158         l    = get_Cmp_left(cmp);
2159         lidx = get_irn_idx(l);
2160         if (! env->entries[lidx]->low_word) {
2161                 /* still not ready */
2162                 return NULL;
2163         }  /* if */
2164
2165         r    = get_Cmp_right(cmp);
2166         ridx = get_irn_idx(r);
2167         if (! env->entries[ridx]->low_word) {
2168                 /* still not ready */
2169                 return NULL;
2170         }  /* if */
2171
2172         pnc  = get_Proj_proj(proj);
2173         blk  = get_nodes_block(cmp);
2174         db   = get_irn_dbg_info(cmp);
2175         low  = new_rd_Cmp(db, irg, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2176         high = new_rd_Cmp(db, irg, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2177
2178         if (pnc == pn_Cmp_Eq) {
2179                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2180                 res = new_rd_And(db, irg, blk,
2181                         new_r_Proj(irg, blk, low, mode_b, pnc),
2182                         new_r_Proj(irg, blk, high, mode_b, pnc),
2183                         mode_b);
2184         } else if (pnc == pn_Cmp_Lg) {
2185                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2186                 res = new_rd_Or(db, irg, blk,
2187                         new_r_Proj(irg, blk, low, mode_b, pnc),
2188                         new_r_Proj(irg, blk, high, mode_b, pnc),
2189                         mode_b);
2190         } else {
2191                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2192                 t = new_rd_And(db, irg, blk,
2193                         new_r_Proj(irg, blk, low, mode_b, pnc),
2194                         new_r_Proj(irg, blk, high, mode_b, pn_Cmp_Eq),
2195                         mode_b);
2196                 res = new_rd_Or(db, irg, blk,
2197                         new_r_Proj(irg, blk, high, mode_b, pnc & ~pn_Cmp_Eq),
2198                         t,
2199                         mode_b);
2200         }  /* if */
2201         return res;
2202 }  /* lower_boolean_Proj_Cmp */
2203
2204 /**
2205  * The type of a lower function.
2206  *
2207  * @param node   the node to be lowered
2208  * @param mode   the low mode for the destination node
2209  * @param env    the lower environment
2210  */
2211 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2212
2213 /**
2214  * Lower a node.
2215  */
2216 static void lower_ops(ir_node *node, void *env)
2217 {
2218         lower_env_t  *lenv = env;
2219         node_entry_t *entry;
2220         int          idx = get_irn_idx(node);
2221         ir_mode      *mode = get_irn_mode(node);
2222
2223         if (mode == mode_b || get_irn_op(node) == op_Psi) {
2224                 int i;
2225
2226                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2227                         ir_node *proj = get_irn_n(node, i);
2228
2229                         if (is_Proj(proj)) {
2230                                 ir_node *cmp = get_Proj_pred(proj);
2231
2232                                 if (is_Cmp(cmp)) {
2233                                         ir_node *arg = get_Cmp_left(cmp);
2234
2235                                         mode = get_irn_mode(arg);
2236                                         if (mode == lenv->params->high_signed ||
2237                                                 mode == lenv->params->high_unsigned) {
2238                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2239
2240                                                 if (res == NULL) {
2241                                                         /* could not lower because predecessors not ready */
2242                                                         waitq_put(lenv->waitq, node);
2243                                                         return;
2244                                                 }  /* if */
2245                                                 set_irn_n(node, i, res);
2246                                         }  /* if */
2247                                 }  /* if */
2248                         }  /* if */
2249                 }  /* for */
2250         }  /* if */
2251
2252         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2253         if (entry || always_lower(get_irn_opcode(node))) {
2254                 ir_op      *op = get_irn_op(node);
2255                 lower_func func = (lower_func)op->ops.generic;
2256
2257                 if (func) {
2258                         mode = get_irn_op_mode(node);
2259
2260                         if (mode == lenv->params->high_signed)
2261                                 mode = lenv->params->low_signed;
2262                         else
2263                                 mode = lenv->params->low_unsigned;
2264
2265                         DB((dbg, LEVEL_1, "  %+F\n", node));
2266                         func(node, mode, lenv);
2267                 }  /* if */
2268         }  /* if */
2269 }  /* lower_ops */
2270
2271 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2272
2273 /**
2274  * Compare two op_mode_entry_t's.
2275  */
2276 static int cmp_op_mode(const void *elt, const void *key, size_t size) {
2277         const op_mode_entry_t *e1 = elt;
2278         const op_mode_entry_t *e2 = key;
2279         (void) size;
2280
2281         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2282 }  /* cmp_op_mode */
2283
2284 /**
2285  * Compare two conv_tp_entry_t's.
2286  */
2287 static int cmp_conv_tp(const void *elt, const void *key, size_t size) {
2288         const conv_tp_entry_t *e1 = elt;
2289         const conv_tp_entry_t *e2 = key;
2290         (void) size;
2291
2292         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2293 }  /* static int cmp_conv_tp */
2294
2295 /*
2296  * Do the lowering.
2297  */
2298 void lower_dw_ops(const lwrdw_param_t *param)
2299 {
2300         lower_env_t lenv;
2301         int i;
2302         ir_graph *rem;
2303
2304         if (! param)
2305                 return;
2306
2307         if (! param->enable)
2308                 return;
2309
2310         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2311
2312         assert(2 * get_mode_size_bits(param->low_signed)   == get_mode_size_bits(param->high_signed));
2313         assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
2314         assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
2315
2316         /* create the necessary maps */
2317         if (! prim_types)
2318                 prim_types = pmap_create();
2319         if (! intrinsic_fkt)
2320                 intrinsic_fkt = new_set(cmp_op_mode, iro_MaxOpcode);
2321         if (! conv_types)
2322                 conv_types = new_set(cmp_conv_tp, 16);
2323         if (! lowered_type)
2324                 lowered_type = pmap_create();
2325
2326         /* create a primitive unsigned and signed type */
2327         if (! tp_u)
2328                 tp_u = get_primitive_type(param->low_unsigned);
2329         if (! tp_s)
2330                 tp_s = get_primitive_type(param->low_signed);
2331
2332         /* create method types for the created binop calls */
2333         if (! binop_tp_u) {
2334                 binop_tp_u = new_type_method(IDENT("binop_u_intrinsic"), 4, 2);
2335                 set_method_param_type(binop_tp_u, 0, tp_u);
2336                 set_method_param_type(binop_tp_u, 1, tp_u);
2337                 set_method_param_type(binop_tp_u, 2, tp_u);
2338                 set_method_param_type(binop_tp_u, 3, tp_u);
2339                 set_method_res_type(binop_tp_u, 0, tp_u);
2340                 set_method_res_type(binop_tp_u, 1, tp_u);
2341         }  /* if */
2342         if (! binop_tp_s) {
2343                 binop_tp_s = new_type_method(IDENT("binop_s_intrinsic"), 4, 2);
2344                 set_method_param_type(binop_tp_s, 0, tp_u);
2345                 set_method_param_type(binop_tp_s, 1, tp_s);
2346                 set_method_param_type(binop_tp_s, 2, tp_u);
2347                 set_method_param_type(binop_tp_s, 3, tp_s);
2348                 set_method_res_type(binop_tp_s, 0, tp_u);
2349                 set_method_res_type(binop_tp_s, 1, tp_s);
2350         }  /* if */
2351         if (! shiftop_tp_u) {
2352                 shiftop_tp_u = new_type_method(IDENT("shiftop_u_intrinsic"), 3, 2);
2353                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2354                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2355                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2356                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2357                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2358         }  /* if */
2359         if (! shiftop_tp_s) {
2360                 shiftop_tp_s = new_type_method(IDENT("shiftop_s_intrinsic"), 3, 2);
2361                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2362                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2363                 /* beware: shift count is always mode_Iu */
2364                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2365                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2366                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2367         }  /* if */
2368         if (! unop_tp_u) {
2369                 unop_tp_u = new_type_method(IDENT("unop_u_intrinsic"), 2, 2);
2370                 set_method_param_type(unop_tp_u, 0, tp_u);
2371                 set_method_param_type(unop_tp_u, 1, tp_u);
2372                 set_method_res_type(unop_tp_u, 0, tp_u);
2373                 set_method_res_type(unop_tp_u, 1, tp_u);
2374         }  /* if */
2375         if (! unop_tp_s) {
2376                 unop_tp_s = new_type_method(IDENT("unop_s_intrinsic"), 2, 2);
2377                 set_method_param_type(unop_tp_s, 0, tp_u);
2378                 set_method_param_type(unop_tp_s, 1, tp_s);
2379                 set_method_res_type(unop_tp_s, 0, tp_u);
2380                 set_method_res_type(unop_tp_s, 1, tp_s);
2381         }  /* if */
2382
2383         lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), mode_Iu);
2384         lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), mode_Iu);
2385         lenv.waitq         = new_pdeq();
2386         lenv.params        = param;
2387
2388         /* first clear the generic function pointer for all ops */
2389         clear_irp_opcodes_generic_func();
2390
2391 #define LOWER2(op, fkt)   op_##op->ops.generic = (op_func)fkt
2392 #define LOWER(op)         LOWER2(op, lower_##op)
2393 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2394 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2395
2396         /* the table of all operations that must be lowered follows */
2397         LOWER(Load);
2398         LOWER(Store);
2399         LOWER(Const);
2400         LOWER(And);
2401         LOWER(Or);
2402         LOWER(Eor);
2403         LOWER(Not);
2404         LOWER(Cond);
2405         LOWER(Return);
2406         LOWER(Call);
2407         LOWER(Unknown);
2408         LOWER(Phi);
2409         LOWER(Psi);
2410         LOWER(Start);
2411
2412         LOWER_BIN(Add);
2413         LOWER_BIN(Sub);
2414         LOWER_BIN(Mul);
2415         LOWER(Shl);
2416         LOWER(Shr);
2417         LOWER(Shrs);
2418         LOWER(Rot);
2419         LOWER(DivMod);
2420         LOWER(Div);
2421         LOWER(Mod);
2422         LOWER_UN(Abs);
2423         LOWER_UN(Minus);
2424
2425         LOWER(Conv);
2426
2427 #undef LOWER_UN
2428 #undef LOWER_BIN
2429 #undef LOWER
2430 #undef LOWER2
2431
2432         /* transform all graphs */
2433         rem = current_ir_graph;
2434         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2435                 ir_graph *irg = get_irp_irg(i);
2436                 int n_idx;
2437
2438                 obstack_init(&lenv.obst);
2439
2440                 n_idx = get_irg_last_idx(irg);
2441                 lenv.n_entries = n_idx;
2442                 lenv.entries   = xmalloc(n_idx * sizeof(lenv.entries[0]));
2443                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2444
2445                 /* first step: link all nodes and allocate data */
2446                 lenv.flags = 0;
2447                 lenv.proj_2_block = pmap_create();
2448                 irg_walk_graph(irg, firm_clear_link, prepare_links, &lenv);
2449
2450                 if (lenv.flags & MUST_BE_LOWERED) {
2451                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2452
2453                         /* must do some work */
2454                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2455
2456                         /* last step: all waiting nodes */
2457                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2458                         current_ir_graph = irg;
2459                         while (! pdeq_empty(lenv.waitq)) {
2460                                 ir_node *node = pdeq_getl(lenv.waitq);
2461
2462                                 lower_ops(node, &lenv);
2463                         }  /* while */
2464
2465                         /* outs are invalid, we changed the graph */
2466                         set_irg_outs_inconsistent(irg);
2467
2468                         if (lenv.flags & CF_CHANGED) {
2469                                 /* control flow changed, dominance info is invalid */
2470                                 set_irg_doms_inconsistent(irg);
2471                                 set_irg_extblk_inconsistent(irg);
2472                                 set_irg_loopinfo_inconsistent(irg);
2473                         }  /* if */
2474                 }  /* if */
2475                 pmap_destroy(lenv.proj_2_block);
2476                 free(lenv.entries);
2477                 obstack_free(&lenv.obst, NULL);
2478         }  /* for */
2479         del_pdeq(lenv.waitq);
2480         current_ir_graph = rem;
2481 }  /* lower_dw_ops */
2482
2483 /* Default implementation. */
2484 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2485                                     const ir_mode *imode, const ir_mode *omode,
2486                                     void *context)
2487 {
2488         char buf[64];
2489         ident *id;
2490         ir_entity *ent;
2491         (void) context;
2492
2493         if (imode == omode) {
2494                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2495         } else {
2496                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2497                         get_mode_name(imode), get_mode_name(omode));
2498         }  /* if */
2499         id = new_id_from_str(buf);
2500
2501         ent = new_entity(get_glob_type(), id, method);
2502         set_entity_ld_ident(ent, get_entity_ident(ent));
2503         set_entity_visibility(ent, visibility_external_allocated);
2504         return ent;
2505 }  /* def_create_intrinsic_fkt */