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                                 ir_node *op_conv = new_rd_Conv(dbg, irg, block, op, dst_mode_h);
1432                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op_conv,
1433                                         new_Const_long(mode_Iu, get_mode_size_bits(dst_mode_h) - 1), dst_mode_h);
1434                         } else {
1435                                 env->entries[idx]->high_word = new_Const(dst_mode_h, get_mode_null(dst_mode_h));
1436                         }  /* if */
1437                 }  /* if */
1438         } else {
1439                 ir_node *irn, *call;
1440                 ir_mode *omode = env->params->high_signed;
1441                 ir_type *mtp = get_conv_type(imode, omode, env);
1442
1443                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1444                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1445                 set_irn_pinned(call, get_irn_pinned(node));
1446                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1447
1448                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode_l, 0);
1449                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode_h, 1);
1450         }  /* if */
1451 }  /* lower_Conv_to_Ls */
1452
1453 /**
1454  * Translate a Conv to higher_unsigned
1455  */
1456 static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
1457         ir_node  *op    = get_Conv_op(node);
1458         ir_mode  *imode = get_irn_mode(op);
1459         ir_mode  *dst_mode = env->params->low_unsigned;
1460         int      idx = get_irn_idx(node);
1461         ir_graph *irg = current_ir_graph;
1462         ir_node  *block = get_nodes_block(node);
1463         dbg_info *dbg = get_irn_dbg_info(node);
1464
1465         assert(idx < env->n_entries);
1466
1467         if (mode_is_int(imode) || mode_is_reference(imode)) {
1468                 if (imode == env->params->high_signed) {
1469                         /* a Conv from Ls to Lu */
1470                         int op_idx = get_irn_idx(op);
1471
1472                         if (! env->entries[op_idx]->low_word) {
1473                                 /* not ready yet, wait */
1474                                 pdeq_putr(env->waitq, node);
1475                                 return;
1476                         }  /* if */
1477                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word, dst_mode);
1478                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode);
1479                 } else {
1480                         /* simple case: create a high word */
1481                         if (imode != dst_mode)
1482                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode);
1483
1484                         env->entries[idx]->low_word  = op;
1485
1486                         if (mode_is_signed(imode)) {
1487                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op,
1488                                         new_Const_long(mode_Iu, get_mode_size_bits(dst_mode) - 1), dst_mode);
1489                         } else {
1490                                 env->entries[idx]->high_word = new_Const(dst_mode, get_mode_null(dst_mode));
1491                         }  /* if */
1492                 }  /* if */
1493         } else {
1494                 ir_node *irn, *call;
1495                 ir_mode *omode = env->params->high_unsigned;
1496                 ir_type *mtp = get_conv_type(imode, omode, env);
1497
1498                 /* do an intrinsic call */
1499                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1500                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1501                 set_irn_pinned(call, get_irn_pinned(node));
1502                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1503
1504                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode, 0);
1505                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode, 1);
1506         }  /* if */
1507 }  /* lower_Conv_to_Lu */
1508
1509 /**
1510  * Translate a Conv from higher_signed
1511  */
1512 static void lower_Conv_from_Ls(ir_node *node, lower_env_t *env) {
1513         ir_node  *op    = get_Conv_op(node);
1514         ir_mode  *omode = get_irn_mode(node);
1515         ir_node  *block = get_nodes_block(node);
1516         dbg_info *dbg = get_irn_dbg_info(node);
1517         int      idx = get_irn_idx(op);
1518         ir_graph *irg = current_ir_graph;
1519
1520         assert(idx < env->n_entries);
1521
1522         if (! env->entries[idx]->low_word) {
1523                 /* not ready yet, wait */
1524                 pdeq_putr(env->waitq, node);
1525                 return;
1526         }  /* if */
1527
1528         if (mode_is_int(omode) || mode_is_reference(omode)) {
1529                 op = env->entries[idx]->low_word;
1530
1531                 /* simple case: create a high word */
1532                 if (omode != env->params->low_signed)
1533                         op = new_rd_Conv(dbg, irg, block, op, omode);
1534
1535                 set_Conv_op(node, op);
1536         } else {
1537                 ir_node *irn, *call, *in[2];
1538                 ir_mode *imode = env->params->high_signed;
1539                 ir_type *mtp = get_conv_type(imode, omode, env);
1540
1541                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1542                 in[0] = env->entries[idx]->low_word;
1543                 in[1] = env->entries[idx]->high_word;
1544
1545                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1546                 set_irn_pinned(call, get_irn_pinned(node));
1547                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1548
1549                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1550         }  /* if */
1551 }  /* lower_Conv_from_Ls */
1552
1553 /**
1554  * Translate a Conv from higher_unsigned
1555  */
1556 static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
1557         ir_node  *op    = get_Conv_op(node);
1558         ir_mode  *omode = get_irn_mode(node);
1559         ir_node  *block = get_nodes_block(node);
1560         dbg_info *dbg = get_irn_dbg_info(node);
1561         int      idx = get_irn_idx(op);
1562         ir_graph *irg = current_ir_graph;
1563
1564         assert(idx < env->n_entries);
1565
1566         if (! env->entries[idx]->low_word) {
1567                 /* not ready yet, wait */
1568                 pdeq_putr(env->waitq, node);
1569                 return;
1570         }  /* if */
1571
1572         if (mode_is_int(omode) || mode_is_reference(omode)) {
1573                 op = env->entries[idx]->low_word;
1574
1575                 /* simple case: create a high word */
1576                 if (omode != env->params->low_unsigned)
1577                         op = new_rd_Conv(dbg, irg, block, op, omode);
1578
1579                 set_Conv_op(node, op);
1580         } else {
1581                 ir_node *irn, *call, *in[2];
1582                 ir_mode *imode = env->params->high_unsigned;
1583                 ir_type *mtp = get_conv_type(imode, omode, env);
1584
1585                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1586                 in[0] = env->entries[idx]->low_word;
1587                 in[1] = env->entries[idx]->high_word;
1588
1589                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1590                 set_irn_pinned(call, get_irn_pinned(node));
1591                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1592
1593                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1594         }  /* if */
1595 }  /* lower_Conv_from_Lu */
1596
1597 /**
1598  * Translate a Conv.
1599  */
1600 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env) {
1601         mode = get_irn_mode(node);
1602
1603         if (mode == env->params->high_signed) {
1604                 lower_Conv_to_Ls(node, env);
1605         } else if (mode == env->params->high_unsigned) {
1606                 lower_Conv_to_Lu(node, env);
1607         } else {
1608                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1609
1610                 if (mode == env->params->high_signed) {
1611                         lower_Conv_from_Ls(node, env);
1612                 } else if (mode == env->params->high_unsigned) {
1613                         lower_Conv_from_Lu(node, env);
1614                 }  /* if */
1615         }  /* if */
1616 }  /* lower_Conv */
1617
1618 /**
1619  * Lower the method type.
1620  */
1621 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
1622         pmap_entry *entry;
1623         ident      *id;
1624         ir_type    *res;
1625
1626         if (is_lowered_type(mtp))
1627                 return mtp;
1628
1629         entry = pmap_find(lowered_type, mtp);
1630         if (! entry) {
1631                 int i, n, r, n_param, n_res;
1632
1633                 /* count new number of params */
1634                 n_param = n = get_method_n_params(mtp);
1635                 for (i = n_param - 1; i >= 0; --i) {
1636                         ir_type *tp = get_method_param_type(mtp, i);
1637
1638                         if (is_Primitive_type(tp)) {
1639                                 ir_mode *mode = get_type_mode(tp);
1640
1641                                 if (mode == env->params->high_signed ||
1642                                         mode == env->params->high_unsigned)
1643                                         ++n_param;
1644                         }  /* if */
1645                 }  /* for */
1646
1647                 /* count new number of results */
1648                 n_res = r = get_method_n_ress(mtp);
1649                 for (i = n_res - 1; i >= 0; --i) {
1650                         ir_type *tp = get_method_res_type(mtp, i);
1651
1652                         if (is_Primitive_type(tp)) {
1653                                 ir_mode *mode = get_type_mode(tp);
1654
1655                                 if (mode == env->params->high_signed ||
1656                                         mode == env->params->high_unsigned)
1657                                         ++n_res;
1658                         }  /* if */
1659                 }  /* for */
1660
1661                 id = mangle_u(new_id_from_chars("L", 1), get_type_ident(mtp));
1662                 res = new_type_method(id, n_param, n_res);
1663
1664                 /* set param types and result types */
1665                 for (i = n_param = 0; i < n; ++i) {
1666                         ir_type *tp = get_method_param_type(mtp, i);
1667
1668                         if (is_Primitive_type(tp)) {
1669                                 ir_mode *mode = get_type_mode(tp);
1670
1671                                 if (mode == env->params->high_signed) {
1672                                         set_method_param_type(res, n_param++, tp_u);
1673                                         set_method_param_type(res, n_param++, tp_s);
1674                                 } else if (mode == env->params->high_unsigned) {
1675                                         set_method_param_type(res, n_param++, tp_u);
1676                                         set_method_param_type(res, n_param++, tp_u);
1677                                 } else {
1678                                         set_method_param_type(res, n_param++, tp);
1679                                 }  /* if */
1680                         } else {
1681                                 set_method_param_type(res, n_param++, tp);
1682                         }  /* if */
1683                 }  /* for */
1684                 for (i = n_res = 0; i < r; ++i) {
1685                         ir_type *tp = get_method_res_type(mtp, i);
1686
1687                         if (is_Primitive_type(tp)) {
1688                                 ir_mode *mode = get_type_mode(tp);
1689
1690                                 if (mode == env->params->high_signed) {
1691                                         set_method_res_type(res, n_res++, tp_u);
1692                                         set_method_res_type(res, n_res++, tp_s);
1693                                 } else if (mode == env->params->high_unsigned) {
1694                                         set_method_res_type(res, n_res++, tp_u);
1695                                         set_method_res_type(res, n_res++, tp_u);
1696                                 } else {
1697                                         set_method_res_type(res, n_res++, tp);
1698                                 }  /* if */
1699                         } else {
1700                                 set_method_res_type(res, n_res++, tp);
1701                         }  /* if */
1702                 }  /* for */
1703                 set_lowered_type(mtp, res);
1704                 pmap_insert(lowered_type, mtp, res);
1705         } else {
1706                 res = entry->value;
1707         }  /* if */
1708         return res;
1709 }  /* lower_mtp */
1710
1711 /**
1712  * Translate a Return.
1713  */
1714 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
1715         ir_graph  *irg = current_ir_graph;
1716         ir_entity *ent = get_irg_entity(irg);
1717         ir_type   *mtp = get_entity_type(ent);
1718         ir_node   **in;
1719         int       i, j, n, idx;
1720         int       need_conv = 0;
1721         (void) mode;
1722
1723         /* check if this return must be lowered */
1724         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1725                 ir_node *pred = get_Return_res(node, i);
1726                 ir_mode *mode = get_irn_op_mode(pred);
1727
1728                 if (mode == env->params->high_signed ||
1729                         mode == env->params->high_unsigned) {
1730                         idx = get_irn_idx(pred);
1731                         if (! env->entries[idx]->low_word) {
1732                                 /* not ready yet, wait */
1733                                 pdeq_putr(env->waitq, node);
1734                                 return;
1735                         }  /* if */
1736                         need_conv = 1;
1737                 }  /* if */
1738         }  /* for */
1739         if (! need_conv)
1740                 return;
1741
1742         ent = get_irg_entity(irg);
1743         mtp = get_entity_type(ent);
1744
1745         mtp = lower_mtp(mtp, env);
1746         set_entity_type(ent, mtp);
1747
1748         /* create a new in array */
1749         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1750         in[0] = get_Return_mem(node);
1751
1752         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1753                 ir_node *pred = get_Return_res(node, i);
1754
1755                 idx = get_irn_idx(pred);
1756                 assert(idx < env->n_entries);
1757
1758                 if (env->entries[idx]) {
1759                         in[++j] = env->entries[idx]->low_word;
1760                         in[++j] = env->entries[idx]->high_word;
1761                 } else {
1762                         in[++j] = pred;
1763                 }  /* if */
1764         }  /* for */
1765
1766         set_irn_in(node, j+1, in);
1767 }  /* lower_Return */
1768
1769 /**
1770  * Translate the parameters.
1771  */
1772 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env) {
1773         ir_graph  *irg = current_ir_graph;
1774         ir_entity *ent = get_irg_entity(irg);
1775         ir_type   *tp  = get_entity_type(ent);
1776         ir_type   *mtp;
1777         long      *new_projs;
1778         int       i, j, n_params, rem;
1779         ir_node   *proj, *args;
1780         (void) mode;
1781
1782         if (is_lowered_type(tp)) {
1783                 mtp = get_associated_type(tp);
1784         } else {
1785                 mtp = tp;
1786         }  /* if */
1787         assert(! is_lowered_type(mtp));
1788
1789         n_params = get_method_n_params(mtp);
1790         if (n_params <= 0)
1791                 return;
1792
1793         NEW_ARR_A(long, new_projs, n_params);
1794
1795         /* first check if we have parameters that must be fixed */
1796         for (i = j = 0; i < n_params; ++i, ++j) {
1797                 ir_type *tp = get_method_param_type(mtp, i);
1798
1799                 new_projs[i] = j;
1800                 if (is_Primitive_type(tp)) {
1801                         ir_mode *mode = get_type_mode(tp);
1802
1803                         if (mode == env->params->high_signed ||
1804                                 mode == env->params->high_unsigned)
1805                                 ++j;
1806                 }  /* if */
1807         }  /* for */
1808         if (i == j)
1809                 return;
1810
1811         mtp = lower_mtp(mtp, env);
1812         set_entity_type(ent, mtp);
1813
1814         /* switch off optimization for new Proj nodes or they might be CSE'ed
1815            with not patched one's */
1816         rem = get_optimize();
1817         set_optimize(0);
1818
1819         /* ok, fix all Proj's and create new ones */
1820         args = get_irg_args(irg);
1821         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1822                 ir_node *pred = get_Proj_pred(proj);
1823                 long proj_nr;
1824                 int idx;
1825                 ir_mode *mode;
1826                 dbg_info *dbg;
1827
1828                 /* do not visit this node again */
1829                 mark_irn_visited(proj);
1830
1831                 if (pred != args)
1832                         continue;
1833
1834                 proj_nr = get_Proj_proj(proj);
1835                 set_Proj_proj(proj, new_projs[proj_nr]);
1836
1837                 idx = get_irn_idx(proj);
1838                 if (env->entries[idx]) {
1839                         ir_mode *low_mode = env->params->low_unsigned;
1840
1841                         mode = get_irn_mode(proj);
1842
1843                         if (mode == env->params->high_signed) {
1844                                 mode = env->params->low_signed;
1845                         } else {
1846                                 mode = env->params->low_unsigned;
1847                         }  /* if */
1848
1849                         dbg = get_irn_dbg_info(proj);
1850                         env->entries[idx]->low_word  =
1851                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, low_mode, new_projs[proj_nr]);
1852                         env->entries[idx]->high_word =
1853                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, mode, new_projs[proj_nr] + 1);
1854                 }  /* if */
1855         }  /* for */
1856         set_optimize(rem);
1857 }  /* lower_Start */
1858
1859 /**
1860  * Translate a Call.
1861  */
1862 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
1863         ir_graph *irg = current_ir_graph;
1864         ir_type  *tp = get_Call_type(node);
1865         ir_type  *call_tp;
1866         ir_node  **in, *proj, *results;
1867         int      n_params, n_res, need_lower = 0;
1868         int      i, j;
1869         long     *res_numbers = NULL;
1870         (void) mode;
1871
1872         if (is_lowered_type(tp)) {
1873                 call_tp = get_associated_type(tp);
1874         } else {
1875                 call_tp = tp;
1876         }  /* if */
1877
1878         assert(! is_lowered_type(call_tp));
1879
1880         n_params = get_method_n_params(call_tp);
1881         for (i = 0; i < n_params; ++i) {
1882                 ir_type *tp = get_method_param_type(call_tp, i);
1883
1884                 if (is_Primitive_type(tp)) {
1885                         ir_mode *mode = get_type_mode(tp);
1886
1887                         if (mode == env->params->high_signed ||
1888                                 mode == env->params->high_unsigned) {
1889                                 need_lower = 1;
1890                                 break;
1891                         }  /* if */
1892                 }  /* if */
1893         }  /* for */
1894         n_res = get_method_n_ress(call_tp);
1895         if (n_res > 0) {
1896                 NEW_ARR_A(long, res_numbers, n_res);
1897
1898                 for (i = j = 0; i < n_res; ++i, ++j) {
1899                         ir_type *tp = get_method_res_type(call_tp, i);
1900
1901                         res_numbers[i] = j;
1902                         if (is_Primitive_type(tp)) {
1903                                 ir_mode *mode = get_type_mode(tp);
1904
1905                                 if (mode == env->params->high_signed ||
1906                                         mode == env->params->high_unsigned) {
1907                                         need_lower = 1;
1908                                         ++j;
1909                                 }  /* if */
1910                         }  /* if */
1911                 }  /* for */
1912         }  /* if */
1913
1914         if (! need_lower)
1915                 return;
1916
1917         /* let's lower it */
1918         call_tp = lower_mtp(call_tp, env);
1919         set_Call_type(node, call_tp);
1920
1921         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1922
1923         in[0] = get_Call_mem(node);
1924         in[1] = get_Call_ptr(node);
1925
1926         for (j = 2, i = 0; i < n_params; ++i) {
1927                 ir_node *pred = get_Call_param(node, i);
1928                 int     idx = get_irn_idx(pred);
1929
1930                 if (env->entries[idx]) {
1931                         if (! env->entries[idx]->low_word) {
1932                                 /* not ready yet, wait */
1933                                 pdeq_putr(env->waitq, node);
1934                                 return;
1935                         }
1936                         in[j++] = env->entries[idx]->low_word;
1937                         in[j++] = env->entries[idx]->high_word;
1938                 } else {
1939                         in[j++] = pred;
1940                 }  /* if */
1941         }  /* for */
1942
1943         set_irn_in(node, j, in);
1944
1945         /* fix the results */
1946         results = NULL;
1947         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1948                 long proj_nr = get_Proj_proj(proj);
1949
1950                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
1951                         /* found the result proj */
1952                         results = proj;
1953                         break;
1954                 }  /* if */
1955         }  /* for */
1956
1957         if (results) {          /* there are results */
1958                 int rem = get_optimize();
1959
1960                 /* switch off optimization for new Proj nodes or they might be CSE'ed
1961                    with not patched one's */
1962                 set_optimize(0);
1963                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
1964                         if (get_Proj_pred(proj) == results) {
1965                                 long proj_nr = get_Proj_proj(proj);
1966                                 int idx;
1967
1968                                 /* found a result */
1969                                 set_Proj_proj(proj, res_numbers[proj_nr]);
1970                                 idx = get_irn_idx(proj);
1971                                 if (env->entries[idx]) {
1972                                         ir_mode *mode = get_irn_mode(proj);
1973                                         ir_mode *low_mode = env->params->low_unsigned;
1974                                         dbg_info *dbg;
1975
1976                                         if (mode == env->params->high_signed) {
1977                                                 mode = env->params->low_signed;
1978                                         } else {
1979                                                 mode = env->params->low_unsigned;
1980                                         }  /* if */
1981
1982                                         dbg = get_irn_dbg_info(proj);
1983                                         env->entries[idx]->low_word  =
1984                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, low_mode, res_numbers[proj_nr]);
1985                                         env->entries[idx]->high_word =
1986                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, mode, res_numbers[proj_nr] + 1);
1987                                 }  /* if */
1988                                 mark_irn_visited(proj);
1989                         }  /* if */
1990                 }  /* for */
1991                 set_optimize(rem);
1992         }
1993 }  /* lower_Call */
1994
1995 /**
1996  * Translate an Unknown into two.
1997  */
1998 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env) {
1999         int idx = get_irn_idx(node);
2000         ir_graph *irg = current_ir_graph;
2001
2002         env->entries[idx]->low_word  =
2003         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2004 }  /* lower_Unknown */
2005
2006 /**
2007  * Translate a Phi.
2008  *
2009  * First step: just create two templates
2010  */
2011 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
2012         ir_mode  *mode_l = env->params->low_unsigned;
2013         ir_graph *irg = current_ir_graph;
2014         ir_node  *block;
2015         ir_node  *unk_l;
2016         ir_node  *unk_h;
2017         ir_node  **inl, **inh;
2018         dbg_info *dbg;
2019         int      idx, i, arity = get_Phi_n_preds(phi);
2020         int      enq = 0;
2021
2022         idx = get_irn_idx(phi);
2023         if (env->entries[idx]->low_word) {
2024                 /* Phi nodes already build, check for inputs */
2025                 ir_node *phil = env->entries[idx]->low_word;
2026                 ir_node *phih = env->entries[idx]->high_word;
2027
2028                 for (i = 0; i < arity; ++i) {
2029                         ir_node *pred = get_Phi_pred(phi, i);
2030                         int     idx = get_irn_idx(pred);
2031
2032                         if (env->entries[idx]->low_word) {
2033                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2034                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2035                         } else {
2036                                 /* still not ready */
2037                                 pdeq_putr(env->waitq, phi);
2038                                 return;
2039                         }  /* if */
2040                 }  /* for */
2041         }  /* if */
2042
2043         /* first create a new in array */
2044         NEW_ARR_A(ir_node *, inl, arity);
2045         NEW_ARR_A(ir_node *, inh, arity);
2046         unk_l = new_r_Unknown(irg, mode_l);
2047         unk_h = new_r_Unknown(irg, mode);
2048
2049         for (i = 0; i < arity; ++i) {
2050                 ir_node *pred = get_Phi_pred(phi, i);
2051                 int     idx = get_irn_idx(pred);
2052
2053                 if (env->entries[idx]->low_word) {
2054                         inl[i] = env->entries[idx]->low_word;
2055                         inh[i] = env->entries[idx]->high_word;
2056                 } else {
2057                         inl[i] = unk_l;
2058                         inh[i] = unk_h;
2059                         enq = 1;
2060                 }  /* if */
2061         }  /* for */
2062
2063         dbg   = get_irn_dbg_info(phi);
2064         block = get_nodes_block(phi);
2065
2066         idx = get_irn_idx(phi);
2067         assert(idx < env->n_entries);
2068         env->entries[idx]->low_word  = new_rd_Phi(dbg, irg, block, arity, inl, mode_l);
2069         env->entries[idx]->high_word = new_rd_Phi(dbg, irg, block, arity, inh, mode);
2070
2071         if (enq) {
2072                 /* not yet finished */
2073                 pdeq_putr(env->waitq, phi);
2074         }  /* if */
2075 }  /* lower_Phi */
2076
2077 /**
2078  * Translate a Psi.
2079  */
2080 static void lower_Psi(ir_node *psi, ir_mode *mode, lower_env_t *env) {
2081         ir_graph *irg = current_ir_graph;
2082         ir_node  *block, *val;
2083         ir_node  **valsl, **valsh, **conds;
2084         dbg_info *dbg;
2085         int      idx, i, n_conds = get_Psi_n_conds(psi);
2086
2087         /* first create a new in array */
2088         NEW_ARR_A(ir_node *, valsl, n_conds + 1);
2089         NEW_ARR_A(ir_node *, valsh, n_conds + 1);
2090
2091         for (i = 0; i < n_conds; ++i) {
2092                 val = get_Psi_val(psi, i);
2093                 idx = get_irn_idx(val);
2094                 if (env->entries[idx]->low_word) {
2095                         /* Values already build */
2096                         valsl[i] = env->entries[idx]->low_word;
2097                         valsh[i] = env->entries[idx]->high_word;
2098                 } else {
2099                         /* still not ready */
2100                         pdeq_putr(env->waitq, psi);
2101                         return;
2102                 }  /* if */
2103         }  /* for */
2104         val = get_Psi_default(psi);
2105         idx = get_irn_idx(val);
2106         if (env->entries[idx]->low_word) {
2107                 /* Values already build */
2108                 valsl[i] = env->entries[idx]->low_word;
2109                 valsh[i] = env->entries[idx]->high_word;
2110         } else {
2111                 /* still not ready */
2112                 pdeq_putr(env->waitq, psi);
2113                 return;
2114         }  /* if */
2115
2116
2117         NEW_ARR_A(ir_node *, conds, n_conds);
2118         for (i = 0; i < n_conds; ++i) {
2119                 conds[i] = get_Psi_cond(psi, i);
2120         }  /* for */
2121
2122         dbg   = get_irn_dbg_info(psi);
2123         block = get_nodes_block(psi);
2124
2125         idx = get_irn_idx(psi);
2126         assert(idx < env->n_entries);
2127         env->entries[idx]->low_word  = new_rd_Psi(dbg, irg, block, n_conds, conds, valsl, mode);
2128         env->entries[idx]->high_word = new_rd_Psi(dbg, irg, block, n_conds, conds, valsh, mode);
2129 }  /* lower_Psi */
2130
2131 /**
2132  * check for opcodes that must always be lowered.
2133  */
2134 static int always_lower(ir_opcode code) {
2135         switch (code) {
2136         case iro_Proj:
2137         case iro_Start:
2138         case iro_Call:
2139         case iro_Return:
2140         case iro_Cond:
2141         case iro_Conv:
2142                 return 1;
2143         default:
2144                 return 0;
2145         }  /* switch */
2146 }  /* always_lower */
2147
2148 /**
2149  * lower boolean Proj(Cmp)
2150  */
2151 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env) {
2152         int      lidx, ridx;
2153         ir_node  *l, *r, *low, *high, *t, *res;
2154         pn_Cmp   pnc;
2155         ir_node  *blk;
2156         ir_graph *irg = current_ir_graph;
2157         dbg_info *db;
2158
2159         l    = get_Cmp_left(cmp);
2160         lidx = get_irn_idx(l);
2161         if (! env->entries[lidx]->low_word) {
2162                 /* still not ready */
2163                 return NULL;
2164         }  /* if */
2165
2166         r    = get_Cmp_right(cmp);
2167         ridx = get_irn_idx(r);
2168         if (! env->entries[ridx]->low_word) {
2169                 /* still not ready */
2170                 return NULL;
2171         }  /* if */
2172
2173         pnc  = get_Proj_proj(proj);
2174         blk  = get_nodes_block(cmp);
2175         db   = get_irn_dbg_info(cmp);
2176         low  = new_rd_Cmp(db, irg, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2177         high = new_rd_Cmp(db, irg, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2178
2179         if (pnc == pn_Cmp_Eq) {
2180                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2181                 res = new_rd_And(db, irg, blk,
2182                         new_r_Proj(irg, blk, low, mode_b, pnc),
2183                         new_r_Proj(irg, blk, high, mode_b, pnc),
2184                         mode_b);
2185         } else if (pnc == pn_Cmp_Lg) {
2186                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2187                 res = new_rd_Or(db, irg, blk,
2188                         new_r_Proj(irg, blk, low, mode_b, pnc),
2189                         new_r_Proj(irg, blk, high, mode_b, pnc),
2190                         mode_b);
2191         } else {
2192                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2193                 t = new_rd_And(db, irg, blk,
2194                         new_r_Proj(irg, blk, low, mode_b, pnc),
2195                         new_r_Proj(irg, blk, high, mode_b, pn_Cmp_Eq),
2196                         mode_b);
2197                 res = new_rd_Or(db, irg, blk,
2198                         new_r_Proj(irg, blk, high, mode_b, pnc & ~pn_Cmp_Eq),
2199                         t,
2200                         mode_b);
2201         }  /* if */
2202         return res;
2203 }  /* lower_boolean_Proj_Cmp */
2204
2205 /**
2206  * The type of a lower function.
2207  *
2208  * @param node   the node to be lowered
2209  * @param mode   the low mode for the destination node
2210  * @param env    the lower environment
2211  */
2212 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2213
2214 /**
2215  * Lower a node.
2216  */
2217 static void lower_ops(ir_node *node, void *env)
2218 {
2219         lower_env_t  *lenv = env;
2220         node_entry_t *entry;
2221         int          idx = get_irn_idx(node);
2222         ir_mode      *mode = get_irn_mode(node);
2223
2224         if (mode == mode_b || is_Psi(node)) {
2225                 int i;
2226
2227                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2228                         ir_node *proj = get_irn_n(node, i);
2229
2230                         if (is_Proj(proj)) {
2231                                 ir_node *cmp = get_Proj_pred(proj);
2232
2233                                 if (is_Cmp(cmp)) {
2234                                         ir_node *arg = get_Cmp_left(cmp);
2235
2236                                         mode = get_irn_mode(arg);
2237                                         if (mode == lenv->params->high_signed ||
2238                                                 mode == lenv->params->high_unsigned) {
2239                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2240
2241                                                 if (res == NULL) {
2242                                                         /* could not lower because predecessors not ready */
2243                                                         waitq_put(lenv->waitq, node);
2244                                                         return;
2245                                                 }  /* if */
2246                                                 set_irn_n(node, i, res);
2247                                         }  /* if */
2248                                 }  /* if */
2249                         }  /* if */
2250                 }  /* for */
2251         }  /* if */
2252
2253         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2254         if (entry || always_lower(get_irn_opcode(node))) {
2255                 ir_op      *op = get_irn_op(node);
2256                 lower_func func = (lower_func)op->ops.generic;
2257
2258                 if (func) {
2259                         mode = get_irn_op_mode(node);
2260
2261                         if (mode == lenv->params->high_signed)
2262                                 mode = lenv->params->low_signed;
2263                         else
2264                                 mode = lenv->params->low_unsigned;
2265
2266                         DB((dbg, LEVEL_1, "  %+F\n", node));
2267                         func(node, mode, lenv);
2268                 }  /* if */
2269         }  /* if */
2270 }  /* lower_ops */
2271
2272 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2273
2274 /**
2275  * Compare two op_mode_entry_t's.
2276  */
2277 static int cmp_op_mode(const void *elt, const void *key, size_t size) {
2278         const op_mode_entry_t *e1 = elt;
2279         const op_mode_entry_t *e2 = key;
2280         (void) size;
2281
2282         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2283 }  /* cmp_op_mode */
2284
2285 /**
2286  * Compare two conv_tp_entry_t's.
2287  */
2288 static int cmp_conv_tp(const void *elt, const void *key, size_t size) {
2289         const conv_tp_entry_t *e1 = elt;
2290         const conv_tp_entry_t *e2 = key;
2291         (void) size;
2292
2293         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2294 }  /* static int cmp_conv_tp */
2295
2296 /*
2297  * Do the lowering.
2298  */
2299 void lower_dw_ops(const lwrdw_param_t *param)
2300 {
2301         lower_env_t lenv;
2302         int i;
2303         ir_graph *rem;
2304
2305         if (! param)
2306                 return;
2307
2308         if (! param->enable)
2309                 return;
2310
2311         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2312
2313         assert(2 * get_mode_size_bits(param->low_signed)   == get_mode_size_bits(param->high_signed));
2314         assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
2315         assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
2316
2317         /* create the necessary maps */
2318         if (! prim_types)
2319                 prim_types = pmap_create();
2320         if (! intrinsic_fkt)
2321                 intrinsic_fkt = new_set(cmp_op_mode, iro_MaxOpcode);
2322         if (! conv_types)
2323                 conv_types = new_set(cmp_conv_tp, 16);
2324         if (! lowered_type)
2325                 lowered_type = pmap_create();
2326
2327         /* create a primitive unsigned and signed type */
2328         if (! tp_u)
2329                 tp_u = get_primitive_type(param->low_unsigned);
2330         if (! tp_s)
2331                 tp_s = get_primitive_type(param->low_signed);
2332
2333         /* create method types for the created binop calls */
2334         if (! binop_tp_u) {
2335                 binop_tp_u = new_type_method(IDENT("binop_u_intrinsic"), 4, 2);
2336                 set_method_param_type(binop_tp_u, 0, tp_u);
2337                 set_method_param_type(binop_tp_u, 1, tp_u);
2338                 set_method_param_type(binop_tp_u, 2, tp_u);
2339                 set_method_param_type(binop_tp_u, 3, tp_u);
2340                 set_method_res_type(binop_tp_u, 0, tp_u);
2341                 set_method_res_type(binop_tp_u, 1, tp_u);
2342         }  /* if */
2343         if (! binop_tp_s) {
2344                 binop_tp_s = new_type_method(IDENT("binop_s_intrinsic"), 4, 2);
2345                 set_method_param_type(binop_tp_s, 0, tp_u);
2346                 set_method_param_type(binop_tp_s, 1, tp_s);
2347                 set_method_param_type(binop_tp_s, 2, tp_u);
2348                 set_method_param_type(binop_tp_s, 3, tp_s);
2349                 set_method_res_type(binop_tp_s, 0, tp_u);
2350                 set_method_res_type(binop_tp_s, 1, tp_s);
2351         }  /* if */
2352         if (! shiftop_tp_u) {
2353                 shiftop_tp_u = new_type_method(IDENT("shiftop_u_intrinsic"), 3, 2);
2354                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2355                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2356                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2357                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2358                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2359         }  /* if */
2360         if (! shiftop_tp_s) {
2361                 shiftop_tp_s = new_type_method(IDENT("shiftop_s_intrinsic"), 3, 2);
2362                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2363                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2364                 /* beware: shift count is always mode_Iu */
2365                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2366                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2367                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2368         }  /* if */
2369         if (! unop_tp_u) {
2370                 unop_tp_u = new_type_method(IDENT("unop_u_intrinsic"), 2, 2);
2371                 set_method_param_type(unop_tp_u, 0, tp_u);
2372                 set_method_param_type(unop_tp_u, 1, tp_u);
2373                 set_method_res_type(unop_tp_u, 0, tp_u);
2374                 set_method_res_type(unop_tp_u, 1, tp_u);
2375         }  /* if */
2376         if (! unop_tp_s) {
2377                 unop_tp_s = new_type_method(IDENT("unop_s_intrinsic"), 2, 2);
2378                 set_method_param_type(unop_tp_s, 0, tp_u);
2379                 set_method_param_type(unop_tp_s, 1, tp_s);
2380                 set_method_res_type(unop_tp_s, 0, tp_u);
2381                 set_method_res_type(unop_tp_s, 1, tp_s);
2382         }  /* if */
2383
2384         lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), mode_Iu);
2385         lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), mode_Iu);
2386         lenv.waitq         = new_pdeq();
2387         lenv.params        = param;
2388
2389         /* first clear the generic function pointer for all ops */
2390         clear_irp_opcodes_generic_func();
2391
2392 #define LOWER2(op, fkt)   op_##op->ops.generic = (op_func)fkt
2393 #define LOWER(op)         LOWER2(op, lower_##op)
2394 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2395 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2396
2397         /* the table of all operations that must be lowered follows */
2398         LOWER(Load);
2399         LOWER(Store);
2400         LOWER(Const);
2401         LOWER(And);
2402         LOWER(Or);
2403         LOWER(Eor);
2404         LOWER(Not);
2405         LOWER(Cond);
2406         LOWER(Return);
2407         LOWER(Call);
2408         LOWER(Unknown);
2409         LOWER(Phi);
2410         LOWER(Psi);
2411         LOWER(Start);
2412
2413         LOWER_BIN(Add);
2414         LOWER_BIN(Sub);
2415         LOWER_BIN(Mul);
2416         LOWER(Shl);
2417         LOWER(Shr);
2418         LOWER(Shrs);
2419         LOWER(Rot);
2420         LOWER(DivMod);
2421         LOWER(Div);
2422         LOWER(Mod);
2423         LOWER_UN(Abs);
2424         LOWER_UN(Minus);
2425
2426         LOWER(Conv);
2427
2428 #undef LOWER_UN
2429 #undef LOWER_BIN
2430 #undef LOWER
2431 #undef LOWER2
2432
2433         /* transform all graphs */
2434         rem = current_ir_graph;
2435         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2436                 ir_graph *irg = get_irp_irg(i);
2437                 int n_idx;
2438
2439                 obstack_init(&lenv.obst);
2440
2441                 n_idx = get_irg_last_idx(irg);
2442                 lenv.n_entries = n_idx;
2443                 lenv.entries   = xmalloc(n_idx * sizeof(lenv.entries[0]));
2444                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2445
2446                 /* first step: link all nodes and allocate data */
2447                 lenv.flags = 0;
2448                 lenv.proj_2_block = pmap_create();
2449                 irg_walk_graph(irg, firm_clear_link, prepare_links, &lenv);
2450
2451                 if (lenv.flags & MUST_BE_LOWERED) {
2452                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2453
2454                         /* must do some work */
2455                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2456
2457                         /* last step: all waiting nodes */
2458                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2459                         current_ir_graph = irg;
2460                         while (! pdeq_empty(lenv.waitq)) {
2461                                 ir_node *node = pdeq_getl(lenv.waitq);
2462
2463                                 lower_ops(node, &lenv);
2464                         }  /* while */
2465
2466                         /* outs are invalid, we changed the graph */
2467                         set_irg_outs_inconsistent(irg);
2468
2469                         if (lenv.flags & CF_CHANGED) {
2470                                 /* control flow changed, dominance info is invalid */
2471                                 set_irg_doms_inconsistent(irg);
2472                                 set_irg_extblk_inconsistent(irg);
2473                                 set_irg_loopinfo_inconsistent(irg);
2474                         }  /* if */
2475                 }  /* if */
2476                 pmap_destroy(lenv.proj_2_block);
2477                 free(lenv.entries);
2478                 obstack_free(&lenv.obst, NULL);
2479         }  /* for */
2480         del_pdeq(lenv.waitq);
2481         current_ir_graph = rem;
2482 }  /* lower_dw_ops */
2483
2484 /* Default implementation. */
2485 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2486                                     const ir_mode *imode, const ir_mode *omode,
2487                                     void *context)
2488 {
2489         char buf[64];
2490         ident *id;
2491         ir_entity *ent;
2492         (void) context;
2493
2494         if (imode == omode) {
2495                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2496         } else {
2497                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2498                         get_mode_name(imode), get_mode_name(omode));
2499         }  /* if */
2500         id = new_id_from_str(buf);
2501
2502         ent = new_entity(get_glob_type(), id, method);
2503         set_entity_ld_ident(ent, get_entity_ident(ent));
2504         set_entity_visibility(ent, visibility_external_allocated);
2505         return ent;
2506 }  /* def_create_intrinsic_fkt */