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

   1 /*
   2  * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
   3  *
   4  * This file is part of libFirm.
   5  *
   6  * This file may be distributed and/or modified under the terms of the
   7  * GNU General Public License version 2 as published by the Free Software
   8  * Foundation and appearing in the file LICENSE.GPL included in the
   9  * packaging of this file.
  10  *
  11  * Licensees holding valid libFirm Professional Edition licenses may use
  12  * this file in accordance with the libFirm Commercial License.
  13  * Agreement provided with the Software.
  14  *
  15  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  16  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE.
  18  */
  19
  20 /**
  21  * @file
  22  * @brief   Lower Double word operations, ie 64bit -> 32bit, 32bit -> 16bit etc.
  23  * @date    8.10.2004
  24  * @author  Michael Beck
  25  * @version $Id$
  26  */
  27 #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 (is_Conv(node)) {
 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, mode_P_code, 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_mode *mode_l;
 955                         ir_node *block = get_nodes_block(node);
 956                         ir_node *left = get_Shl_left(node);
 957                         ir_node *c;
 958                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 959                         int idx = get_irn_idx(left);
 960
 961                         left = new_r_Conv(irg, block, env->entries[idx]->low_word, mode);
 962                         idx = get_irn_idx(node);
 963
 964                         if (shf_cnt > 0) {
 965                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
 966                                 env->entries[idx]->high_word = new_r_Shl(irg, block, left, c, mode);
 967                         } else {
 968                                 env->entries[idx]->high_word = left;
 969                         }  /* if */
 970                         mode_l = env->params->low_unsigned;
 971                         env->entries[idx]->low_word  = new_r_Const(irg, block, mode_l, get_mode_null(mode_l));
 972
 973                         return;
 974                 }  /* if */
 975         }  /* if */
 976         lower_Shiftop(node, mode, env);
 977 }  /* lower_Shl */
 978
 979 /**
 980  * Translate a Shrs and handle special cases.
 981  */
 982 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env) {
 983         ir_node  *right = get_Shrs_right(node);
 984         ir_graph *irg = current_ir_graph;
 985
 986         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 987                 tarval *tv = get_Const_tarval(right);
 988
 989                 if (tarval_is_long(tv) &&
 990                         get_tarval_long(tv) >= get_mode_size_bits(mode)) {
 991                         ir_node *block = get_nodes_block(node);
 992                         ir_node *left = get_Shrs_left(node);
 993                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 994                         ir_node *c;
 995                         int idx = get_irn_idx(left);
 996
 997                         left = env->entries[idx]->high_word;
 998                         idx = get_irn_idx(node);
 999
1000                         if (shf_cnt > 0) {
1001                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
1002                                 env->entries[idx]->low_word = new_r_Shrs(irg, block, left, c, mode);
1003                         } else {
1004                                 env->entries[idx]->low_word = left;
1005                         }  /* if */
1006                         c = new_r_Const_long(irg, block, mode_Iu, get_mode_size_bits(mode) - 1);
1007                         env->entries[idx]->high_word = new_r_Shrs(irg, block, left, c, mode);
1008
1009                         return;
1010                 }  /* if */
1011         }  /* if */
1012         lower_Shiftop(node, mode, env);
1013 }  /* lower_Shrs */
1014
1015 /**
1016  * Translate a Rot and handle special cases.
1017  */
1018 static void lower_Rot(ir_node *node, ir_mode *mode, lower_env_t *env) {
1019         ir_node  *right = get_Rot_right(node);
1020
1021         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1022                 tarval *tv = get_Const_tarval(right);
1023
1024                 if (tarval_is_long(tv) &&
1025                         get_tarval_long(tv) == get_mode_size_bits(mode)) {
1026                         ir_node *left = get_Rot_left(node);
1027                         ir_node *h, *l;
1028                         int idx = get_irn_idx(left);
1029
1030                         l = env->entries[idx]->low_word;
1031                         h = env->entries[idx]->high_word;
1032                         idx = get_irn_idx(node);
1033
1034                         env->entries[idx]->low_word  = h;
1035                         env->entries[idx]->high_word = l;
1036
1037                         return;
1038                 }  /* if */
1039         }  /* if */
1040         lower_Shiftop(node, mode, env);
1041 }  /* lower_Rot */
1042
1043 /**
1044  * Translate an Unop.
1045  *
1046  * Create an intrinsic Call.
1047  */
1048 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env) {
1049         ir_node  *block, *irn;
1050         ir_node  *in[2];
1051         dbg_info *dbg;
1052         ir_type  *mtp;
1053         int      idx;
1054         ir_graph *irg;
1055         node_entry_t *entry;
1056
1057         irn   = get_unop_op(node);
1058         entry = env->entries[get_irn_idx(irn)];
1059         assert(entry);
1060
1061         if (! entry->low_word) {
1062                 /* not ready yet, wait */
1063                 pdeq_putr(env->waitq, node);
1064                 return;
1065         }  /* if */
1066
1067         in[0] = entry->low_word;
1068         in[1] = entry->high_word;
1069
1070         dbg   = get_irn_dbg_info(node);
1071         block = get_nodes_block(node);
1072         irg   = current_ir_graph;
1073
1074         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1075         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
1076         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
1077                 irn, 2, in, mtp);
1078         set_irn_pinned(irn, get_irn_pinned(node));
1079         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
1080
1081         idx = get_irn_idx(node);
1082         assert(idx < env->n_entries);
1083         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
1084         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
1085 }  /* lower_Unop */
1086
1087 /**
1088  * Translate a logical Binop.
1089  *
1090  * Create two logical Binops.
1091  */
1092 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1093                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_graph *irg, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1094         ir_node  *block, *irn;
1095         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1096         dbg_info *dbg;
1097         int      idx;
1098         ir_graph *irg;
1099         node_entry_t *entry;
1100
1101         irn   = get_binop_left(node);
1102         entry = env->entries[get_irn_idx(irn)];
1103         assert(entry);
1104
1105         if (! entry->low_word) {
1106                 /* not ready yet, wait */
1107                 pdeq_putr(env->waitq, node);
1108                 return;
1109         }  /* if */
1110
1111         lop_l = entry->low_word;
1112         lop_h = entry->high_word;
1113
1114         irn   = get_binop_right(node);
1115         entry = env->entries[get_irn_idx(irn)];
1116         assert(entry);
1117
1118         if (! entry->low_word) {
1119                 /* not ready yet, wait */
1120                 pdeq_putr(env->waitq, node);
1121                 return;
1122         }  /* if */
1123
1124         rop_l = entry->low_word;
1125         rop_h = entry->high_word;
1126
1127         dbg = get_irn_dbg_info(node);
1128         block = get_nodes_block(node);
1129
1130         idx = get_irn_idx(node);
1131         assert(idx < env->n_entries);
1132         irg = current_ir_graph;
1133         env->entries[idx]->low_word  = constr_rd(dbg, irg, block, lop_l, rop_l, env->params->low_unsigned);
1134         env->entries[idx]->high_word = constr_rd(dbg, irg, block, lop_h, rop_h, mode);
1135 }  /* lower_Binop_logical */
1136
1137 /** create a logical operation tranformation */
1138 #define lower_logical(op)                                                \
1139 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1140         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1141 }
1142
1143 lower_logical(And)
1144 lower_logical(Or)
1145 lower_logical(Eor)
1146
1147 /**
1148  * Translate a Not.
1149  *
1150  * Create two logical Nots.
1151  */
1152 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env) {
1153         ir_node  *block, *irn;
1154         ir_node  *op_l, *op_h;
1155         dbg_info *dbg;
1156         int      idx;
1157         ir_graph *irg;
1158         node_entry_t *entry;
1159
1160         irn   = get_Not_op(node);
1161         entry = env->entries[get_irn_idx(irn)];
1162         assert(entry);
1163
1164         if (! entry->low_word) {
1165                 /* not ready yet, wait */
1166                 pdeq_putr(env->waitq, node);
1167                 return;
1168         }  /* if */
1169
1170         op_l = entry->low_word;
1171         op_h = entry->high_word;
1172
1173         dbg   = get_irn_dbg_info(node);
1174         block = get_nodes_block(node);
1175         irg   = current_ir_graph;
1176
1177         idx = get_irn_idx(node);
1178         assert(idx < env->n_entries);
1179         env->entries[idx]->low_word  = new_rd_Not(dbg, current_ir_graph, block, op_l, env->params->low_unsigned);
1180         env->entries[idx]->high_word = new_rd_Not(dbg, current_ir_graph, block, op_h, mode);
1181 }  /* lower_Not */
1182
1183 /**
1184  * Translate a Cond.
1185  */
1186 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
1187         ir_node *cmp, *left, *right, *block;
1188         ir_node *sel = get_Cond_selector(node);
1189         ir_mode *m = get_irn_mode(sel);
1190         int     idx;
1191         (void) mode;
1192
1193         if (m == mode_b) {
1194                 node_entry_t *lentry, *rentry;
1195                 ir_node  *proj, *projT = NULL, *projF = NULL;
1196                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1197                 ir_node  *projHF, *projHT;
1198                 ir_node  *dst_blk;
1199                 ir_graph *irg;
1200                 pn_Cmp   pnc;
1201                 dbg_info *dbg;
1202
1203                 if(!is_Proj(sel))
1204                         return;
1205
1206                 cmp   = get_Proj_pred(sel);
1207                 if(!is_Cmp(cmp))
1208                         return;
1209
1210                 left  = get_Cmp_left(cmp);
1211                 idx   = get_irn_idx(left);
1212                 lentry = env->entries[idx];
1213
1214                 if (! lentry) {
1215                         /* a normal Cmp */
1216                         return;
1217                 }  /* if */
1218
1219                 right = get_Cmp_right(cmp);
1220                 idx   = get_irn_idx(right);
1221                 rentry = env->entries[idx];
1222                 assert(rentry);
1223
1224                 if (! lentry->low_word || !rentry->low_word) {
1225                         /* not yet ready */
1226                         pdeq_putr(env->waitq, node);
1227                         return;
1228                 }  /* if */
1229
1230                 /* all right, build the code */
1231                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1232                         long proj_nr = get_Proj_proj(proj);
1233
1234                         if (proj_nr == pn_Cond_true) {
1235                                 assert(projT == NULL && "more than one Proj(true)");
1236                                 projT = proj;
1237                         } else {
1238                                 assert(proj_nr == pn_Cond_false);
1239                                 assert(projF == NULL && "more than one Proj(false)");
1240                                 projF = proj;
1241                         }  /* if */
1242                         mark_irn_visited(proj);
1243                 }  /* for */
1244                 assert(projT && projF);
1245
1246                 /* create a new high compare */
1247                 block = get_nodes_block(cmp);
1248                 dbg   = get_irn_dbg_info(cmp);
1249                 irg   = current_ir_graph;
1250                 pnc   = get_Proj_proj(sel);
1251
1252                 if (is_Const(right) && is_Const_null(right)) {
1253                         if (pnc == pn_Cmp_Eq || pnc == pn_Cmp_Lg) {
1254                                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1255                                 ir_mode *mode = env->params->low_unsigned;
1256                                 ir_node *low  = new_r_Conv(irg, block, lentry->low_word, mode);
1257                                 ir_node *high = new_r_Conv(irg, block, lentry->high_word, mode);
1258                                 ir_node *or   = new_rd_Or(dbg, irg, block, low, high, mode);
1259                                 ir_node *cmp  = new_rd_Cmp(dbg, irg, block, or, new_Const_long(mode, 0));
1260
1261                                 ir_node *proj = new_r_Proj(irg, block, cmp, mode_b, pnc);
1262                                 exchange(sel, proj);
1263                                 return;
1264                         }
1265                 }
1266
1267                 cmpH = new_rd_Cmp(dbg, irg, block, lentry->high_word, rentry->high_word);
1268
1269                 if (pnc == pn_Cmp_Eq) {
1270                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1271                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1272
1273                         assert(entry);
1274                         dst_blk = entry->value;
1275
1276                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Eq);
1277                         dbg = get_irn_dbg_info(node);
1278                         irn = new_rd_Cond(dbg, irg, block, irn);
1279
1280                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1281                         mark_irn_visited(projHF);
1282                         exchange(projF, projHF);
1283
1284                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1285                         mark_irn_visited(projHT);
1286
1287                         new_bl = new_r_Block(irg, 1, &projHT);
1288
1289                         dbg   = get_irn_dbg_info(cmp);
1290                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1291                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Eq);
1292                         dbg = get_irn_dbg_info(node);
1293                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1294
1295                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1296                         mark_irn_visited(proj);
1297                         add_block_cf_input(dst_blk, projHF, proj);
1298
1299                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1300                         mark_irn_visited(proj);
1301                         exchange(projT, proj);
1302                 } else if (pnc == pn_Cmp_Lg) {
1303                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1304                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1305
1306                         assert(entry);
1307                         dst_blk = entry->value;
1308
1309                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Lg);
1310                         dbg = get_irn_dbg_info(node);
1311                         irn = new_rd_Cond(dbg, irg, block, irn);
1312
1313                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1314                         mark_irn_visited(projHT);
1315                         exchange(projT, projHT);
1316
1317                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1318                         mark_irn_visited(projHF);
1319
1320                         new_bl = new_r_Block(irg, 1, &projHF);
1321
1322                         dbg   = get_irn_dbg_info(cmp);
1323                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1324                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Lg);
1325                         dbg = get_irn_dbg_info(node);
1326                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1327
1328                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1329                         mark_irn_visited(proj);
1330                         add_block_cf_input(dst_blk, projHT, proj);
1331
1332                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1333                         mark_irn_visited(proj);
1334                         exchange(projF, proj);
1335                 } else {
1336                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1337                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1338                         pmap_entry *entry;
1339
1340                         entry = pmap_find(env->proj_2_block, projT);
1341                         assert(entry);
1342                         dstT = entry->value;
1343
1344                         entry = pmap_find(env->proj_2_block, projF);
1345                         assert(entry);
1346                         dstF = entry->value;
1347
1348                         irn = new_r_Proj(irg, block, cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1349                         dbg = get_irn_dbg_info(node);
1350                         irn = new_rd_Cond(dbg, irg, block, irn);
1351
1352                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1353                         mark_irn_visited(projHT);
1354                         exchange(projT, projHT);
1355                         projT = projHT;
1356
1357                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1358                         mark_irn_visited(projHF);
1359
1360                         newbl_eq = new_r_Block(irg, 1, &projHF);
1361
1362                         irn = new_r_Proj(irg, newbl_eq, cmpH, mode_b, pn_Cmp_Eq);
1363                         irn = new_rd_Cond(dbg, irg, newbl_eq, irn);
1364
1365                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_false);
1366                         mark_irn_visited(proj);
1367                         exchange(projF, proj);
1368                         projF = proj;
1369
1370                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_true);
1371                         mark_irn_visited(proj);
1372
1373                         newbl_l = new_r_Block(irg, 1, &proj);
1374
1375                         dbg   = get_irn_dbg_info(cmp);
1376                         cmpL = new_rd_Cmp(dbg, irg, newbl_l, lentry->low_word, rentry->low_word);
1377                         irn = new_r_Proj(irg, newbl_l, cmpL, mode_b, pnc);
1378                         dbg = get_irn_dbg_info(node);
1379                         irn = new_rd_Cond(dbg, irg, newbl_l, irn);
1380
1381                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_true);
1382                         mark_irn_visited(proj);
1383                         add_block_cf_input(dstT, projT, proj);
1384
1385                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_false);
1386                         mark_irn_visited(proj);
1387                         add_block_cf_input(dstF, projF, proj);
1388                 }  /* if */
1389
1390                 /* we have changed the control flow */
1391                 env->flags |= CF_CHANGED;
1392         } else {
1393                 idx = get_irn_idx(sel);
1394
1395                 if (env->entries[idx]) {
1396                         /*
1397                            Bad, a jump-table with double-word index.
1398                            This should not happen, but if it does we handle
1399                            it like a Conv were between (in other words, ignore
1400                            the high part.
1401                          */
1402
1403                         if (! env->entries[idx]->low_word) {
1404                                 /* not ready yet, wait */
1405                                 pdeq_putr(env->waitq, node);
1406                                 return;
1407                         }  /* if */
1408                         set_Cond_selector(node, env->entries[idx]->low_word);
1409                 }  /* if */
1410         }  /* if */
1411 }  /* lower_Cond */
1412
1413 /**
1414  * Translate a Conv to higher_signed
1415  */
1416 static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
1417         ir_node  *op    = get_Conv_op(node);
1418         ir_mode  *imode = get_irn_mode(op);
1419         ir_mode  *dst_mode_l = env->params->low_unsigned;
1420         ir_mode  *dst_mode_h = env->params->low_signed;
1421         int      idx = get_irn_idx(node);
1422         ir_graph *irg = current_ir_graph;
1423         ir_node  *block = get_nodes_block(node);
1424         dbg_info *dbg = get_irn_dbg_info(node);
1425
1426         assert(idx < env->n_entries);
1427
1428         if (mode_is_int(imode) || mode_is_reference(imode)) {
1429                 if (imode == env->params->high_unsigned) {
1430                         /* a Conv from Lu to Ls */
1431                         int op_idx = get_irn_idx(op);
1432
1433                         if (! env->entries[op_idx]->low_word) {
1434                                 /* not ready yet, wait */
1435                                 pdeq_putr(env->waitq, node);
1436                                 return;
1437                         }  /* if */
1438                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word,  dst_mode_l);
1439                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode_h);
1440                 } else {
1441                         /* simple case: create a high word */
1442                         if (imode != dst_mode_l)
1443                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode_l);
1444
1445                         env->entries[idx]->low_word  = op;
1446
1447                         if (mode_is_signed(imode)) {
1448                                 ir_node *op_conv = new_rd_Conv(dbg, irg, block, op, dst_mode_h);
1449                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op_conv,
1450                                         new_Const_long(mode_Iu, get_mode_size_bits(dst_mode_h) - 1), dst_mode_h);
1451                         } else {
1452                                 env->entries[idx]->high_word = new_Const(dst_mode_h, get_mode_null(dst_mode_h));
1453                         }  /* if */
1454                 }  /* if */
1455         } else {
1456                 ir_node *irn, *call;
1457                 ir_mode *omode = env->params->high_signed;
1458                 ir_type *mtp = get_conv_type(imode, omode, env);
1459
1460                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1461                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1462                 set_irn_pinned(call, get_irn_pinned(node));
1463                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1464
1465                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode_l, 0);
1466                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode_h, 1);
1467         }  /* if */
1468 }  /* lower_Conv_to_Ls */
1469
1470 /**
1471  * Translate a Conv to higher_unsigned
1472  */
1473 static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
1474         ir_node  *op    = get_Conv_op(node);
1475         ir_mode  *imode = get_irn_mode(op);
1476         ir_mode  *dst_mode = env->params->low_unsigned;
1477         int      idx = get_irn_idx(node);
1478         ir_graph *irg = current_ir_graph;
1479         ir_node  *block = get_nodes_block(node);
1480         dbg_info *dbg = get_irn_dbg_info(node);
1481
1482         assert(idx < env->n_entries);
1483
1484         if (mode_is_int(imode) || mode_is_reference(imode)) {
1485                 if (imode == env->params->high_signed) {
1486                         /* a Conv from Ls to Lu */
1487                         int op_idx = get_irn_idx(op);
1488
1489                         if (! env->entries[op_idx]->low_word) {
1490                                 /* not ready yet, wait */
1491                                 pdeq_putr(env->waitq, node);
1492                                 return;
1493                         }  /* if */
1494                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word, dst_mode);
1495                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode);
1496                 } else {
1497                         /* simple case: create a high word */
1498                         if (imode != dst_mode)
1499                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode);
1500
1501                         env->entries[idx]->low_word  = op;
1502
1503                         if (mode_is_signed(imode)) {
1504                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op,
1505                                         new_Const_long(mode_Iu, get_mode_size_bits(dst_mode) - 1), dst_mode);
1506                         } else {
1507                                 env->entries[idx]->high_word = new_Const(dst_mode, get_mode_null(dst_mode));
1508                         }  /* if */
1509                 }  /* if */
1510         } else {
1511                 ir_node *irn, *call;
1512                 ir_mode *omode = env->params->high_unsigned;
1513                 ir_type *mtp = get_conv_type(imode, omode, env);
1514
1515                 /* do an intrinsic call */
1516                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1517                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1518                 set_irn_pinned(call, get_irn_pinned(node));
1519                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1520
1521                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode, 0);
1522                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode, 1);
1523         }  /* if */
1524 }  /* lower_Conv_to_Lu */
1525
1526 /**
1527  * Translate a Conv from higher_signed
1528  */
1529 static void lower_Conv_from_Ls(ir_node *node, lower_env_t *env) {
1530         ir_node  *op    = get_Conv_op(node);
1531         ir_mode  *omode = get_irn_mode(node);
1532         ir_node  *block = get_nodes_block(node);
1533         dbg_info *dbg = get_irn_dbg_info(node);
1534         int      idx = get_irn_idx(op);
1535         ir_graph *irg = current_ir_graph;
1536
1537         assert(idx < env->n_entries);
1538
1539         if (! env->entries[idx]->low_word) {
1540                 /* not ready yet, wait */
1541                 pdeq_putr(env->waitq, node);
1542                 return;
1543         }  /* if */
1544
1545         if (mode_is_int(omode) || mode_is_reference(omode)) {
1546                 op = env->entries[idx]->low_word;
1547
1548                 /* simple case: create a high word */
1549                 if (omode != env->params->low_signed)
1550                         op = new_rd_Conv(dbg, irg, block, op, omode);
1551
1552                 set_Conv_op(node, op);
1553         } else {
1554                 ir_node *irn, *call, *in[2];
1555                 ir_mode *imode = env->params->high_signed;
1556                 ir_type *mtp = get_conv_type(imode, omode, env);
1557
1558                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1559                 in[0] = env->entries[idx]->low_word;
1560                 in[1] = env->entries[idx]->high_word;
1561
1562                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1563                 set_irn_pinned(call, get_irn_pinned(node));
1564                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1565
1566                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1567         }  /* if */
1568 }  /* lower_Conv_from_Ls */
1569
1570 /**
1571  * Translate a Conv from higher_unsigned
1572  */
1573 static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
1574         ir_node  *op    = get_Conv_op(node);
1575         ir_mode  *omode = get_irn_mode(node);
1576         ir_node  *block = get_nodes_block(node);
1577         dbg_info *dbg = get_irn_dbg_info(node);
1578         int      idx = get_irn_idx(op);
1579         ir_graph *irg = current_ir_graph;
1580
1581         assert(idx < env->n_entries);
1582
1583         if (! env->entries[idx]->low_word) {
1584                 /* not ready yet, wait */
1585                 pdeq_putr(env->waitq, node);
1586                 return;
1587         }  /* if */
1588
1589         if (mode_is_int(omode) || mode_is_reference(omode)) {
1590                 op = env->entries[idx]->low_word;
1591
1592                 /* simple case: create a high word */
1593                 if (omode != env->params->low_unsigned)
1594                         op = new_rd_Conv(dbg, irg, block, op, omode);
1595
1596                 set_Conv_op(node, op);
1597         } else {
1598                 ir_node *irn, *call, *in[2];
1599                 ir_mode *imode = env->params->high_unsigned;
1600                 ir_type *mtp = get_conv_type(imode, omode, env);
1601
1602                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1603                 in[0] = env->entries[idx]->low_word;
1604                 in[1] = env->entries[idx]->high_word;
1605
1606                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1607                 set_irn_pinned(call, get_irn_pinned(node));
1608                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1609
1610                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1611         }  /* if */
1612 }  /* lower_Conv_from_Lu */
1613
1614 /**
1615  * Translate a Conv.
1616  */
1617 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env) {
1618         mode = get_irn_mode(node);
1619
1620         if (mode == env->params->high_signed) {
1621                 lower_Conv_to_Ls(node, env);
1622         } else if (mode == env->params->high_unsigned) {
1623                 lower_Conv_to_Lu(node, env);
1624         } else {
1625                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1626
1627                 if (mode == env->params->high_signed) {
1628                         lower_Conv_from_Ls(node, env);
1629                 } else if (mode == env->params->high_unsigned) {
1630                         lower_Conv_from_Lu(node, env);
1631                 }  /* if */
1632         }  /* if */
1633 }  /* lower_Conv */
1634
1635 /**
1636  * Lower the method type.
1637  */
1638 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
1639         pmap_entry *entry;
1640         ident      *id;
1641         ir_type    *res;
1642
1643         if (is_lowered_type(mtp))
1644                 return mtp;
1645
1646         entry = pmap_find(lowered_type, mtp);
1647         if (! entry) {
1648                 int i, n, r, n_param, n_res;
1649
1650                 /* count new number of params */
1651                 n_param = n = get_method_n_params(mtp);
1652                 for (i = n_param - 1; i >= 0; --i) {
1653                         ir_type *tp = get_method_param_type(mtp, i);
1654
1655                         if (is_Primitive_type(tp)) {
1656                                 ir_mode *mode = get_type_mode(tp);
1657
1658                                 if (mode == env->params->high_signed ||
1659                                         mode == env->params->high_unsigned)
1660                                         ++n_param;
1661                         }  /* if */
1662                 }  /* for */
1663
1664                 /* count new number of results */
1665                 n_res = r = get_method_n_ress(mtp);
1666                 for (i = n_res - 1; i >= 0; --i) {
1667                         ir_type *tp = get_method_res_type(mtp, i);
1668
1669                         if (is_Primitive_type(tp)) {
1670                                 ir_mode *mode = get_type_mode(tp);
1671
1672                                 if (mode == env->params->high_signed ||
1673                                         mode == env->params->high_unsigned)
1674                                         ++n_res;
1675                         }  /* if */
1676                 }  /* for */
1677
1678                 id = mangle_u(new_id_from_chars("L", 1), get_type_ident(mtp));
1679                 res = new_type_method(id, n_param, n_res);
1680
1681                 /* set param types and result types */
1682                 for (i = n_param = 0; i < n; ++i) {
1683                         ir_type *tp = get_method_param_type(mtp, i);
1684
1685                         if (is_Primitive_type(tp)) {
1686                                 ir_mode *mode = get_type_mode(tp);
1687
1688                                 if (mode == env->params->high_signed) {
1689                                         set_method_param_type(res, n_param++, tp_u);
1690                                         set_method_param_type(res, n_param++, tp_s);
1691                                 } else if (mode == env->params->high_unsigned) {
1692                                         set_method_param_type(res, n_param++, tp_u);
1693                                         set_method_param_type(res, n_param++, tp_u);
1694                                 } else {
1695                                         set_method_param_type(res, n_param++, tp);
1696                                 }  /* if */
1697                         } else {
1698                                 set_method_param_type(res, n_param++, tp);
1699                         }  /* if */
1700                 }  /* for */
1701                 for (i = n_res = 0; i < r; ++i) {
1702                         ir_type *tp = get_method_res_type(mtp, i);
1703
1704                         if (is_Primitive_type(tp)) {
1705                                 ir_mode *mode = get_type_mode(tp);
1706
1707                                 if (mode == env->params->high_signed) {
1708                                         set_method_res_type(res, n_res++, tp_u);
1709                                         set_method_res_type(res, n_res++, tp_s);
1710                                 } else if (mode == env->params->high_unsigned) {
1711                                         set_method_res_type(res, n_res++, tp_u);
1712                                         set_method_res_type(res, n_res++, tp_u);
1713                                 } else {
1714                                         set_method_res_type(res, n_res++, tp);
1715                                 }  /* if */
1716                         } else {
1717                                 set_method_res_type(res, n_res++, tp);
1718                         }  /* if */
1719                 }  /* for */
1720                 set_lowered_type(mtp, res);
1721                 pmap_insert(lowered_type, mtp, res);
1722         } else {
1723                 res = entry->value;
1724         }  /* if */
1725         return res;
1726 }  /* lower_mtp */
1727
1728 /**
1729  * Translate a Return.
1730  */
1731 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
1732         ir_graph  *irg = current_ir_graph;
1733         ir_entity *ent = get_irg_entity(irg);
1734         ir_type   *mtp = get_entity_type(ent);
1735         ir_node   **in;
1736         int       i, j, n, idx;
1737         int       need_conv = 0;
1738         (void) mode;
1739
1740         /* check if this return must be lowered */
1741         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1742                 ir_node *pred = get_Return_res(node, i);
1743                 ir_mode *mode = get_irn_op_mode(pred);
1744
1745                 if (mode == env->params->high_signed ||
1746                         mode == env->params->high_unsigned) {
1747                         idx = get_irn_idx(pred);
1748                         if (! env->entries[idx]->low_word) {
1749                                 /* not ready yet, wait */
1750                                 pdeq_putr(env->waitq, node);
1751                                 return;
1752                         }  /* if */
1753                         need_conv = 1;
1754                 }  /* if */
1755         }  /* for */
1756         if (! need_conv)
1757                 return;
1758
1759         ent = get_irg_entity(irg);
1760         mtp = get_entity_type(ent);
1761
1762         mtp = lower_mtp(mtp, env);
1763         set_entity_type(ent, mtp);
1764
1765         /* create a new in array */
1766         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1767         in[0] = get_Return_mem(node);
1768
1769         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1770                 ir_node *pred = get_Return_res(node, i);
1771
1772                 idx = get_irn_idx(pred);
1773                 assert(idx < env->n_entries);
1774
1775                 if (env->entries[idx]) {
1776                         in[++j] = env->entries[idx]->low_word;
1777                         in[++j] = env->entries[idx]->high_word;
1778                 } else {
1779                         in[++j] = pred;
1780                 }  /* if */
1781         }  /* for */
1782
1783         set_irn_in(node, j+1, in);
1784 }  /* lower_Return */
1785
1786 /**
1787  * Translate the parameters.
1788  */
1789 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env) {
1790         ir_graph  *irg = current_ir_graph;
1791         ir_entity *ent = get_irg_entity(irg);
1792         ir_type   *tp  = get_entity_type(ent);
1793         ir_type   *mtp;
1794         long      *new_projs;
1795         int       i, j, n_params, rem;
1796         ir_node   *proj, *args;
1797         (void) mode;
1798
1799         if (is_lowered_type(tp)) {
1800                 mtp = get_associated_type(tp);
1801         } else {
1802                 mtp = tp;
1803         }  /* if */
1804         assert(! is_lowered_type(mtp));
1805
1806         n_params = get_method_n_params(mtp);
1807         if (n_params <= 0)
1808                 return;
1809
1810         NEW_ARR_A(long, new_projs, n_params);
1811
1812         /* first check if we have parameters that must be fixed */
1813         for (i = j = 0; i < n_params; ++i, ++j) {
1814                 ir_type *tp = get_method_param_type(mtp, i);
1815
1816                 new_projs[i] = j;
1817                 if (is_Primitive_type(tp)) {
1818                         ir_mode *mode = get_type_mode(tp);
1819
1820                         if (mode == env->params->high_signed ||
1821                                 mode == env->params->high_unsigned)
1822                                 ++j;
1823                 }  /* if */
1824         }  /* for */
1825         if (i == j)
1826                 return;
1827
1828         mtp = lower_mtp(mtp, env);
1829         set_entity_type(ent, mtp);
1830
1831         /* switch off optimization for new Proj nodes or they might be CSE'ed
1832            with not patched one's */
1833         rem = get_optimize();
1834         set_optimize(0);
1835
1836         /* ok, fix all Proj's and create new ones */
1837         args = get_irg_args(irg);
1838         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1839                 ir_node *pred = get_Proj_pred(proj);
1840                 long proj_nr;
1841                 int idx;
1842                 ir_mode *mode;
1843                 dbg_info *dbg;
1844
1845                 /* do not visit this node again */
1846                 mark_irn_visited(proj);
1847
1848                 if (pred != args)
1849                         continue;
1850
1851                 proj_nr = get_Proj_proj(proj);
1852                 set_Proj_proj(proj, new_projs[proj_nr]);
1853
1854                 idx = get_irn_idx(proj);
1855                 if (env->entries[idx]) {
1856                         ir_mode *low_mode = env->params->low_unsigned;
1857
1858                         mode = get_irn_mode(proj);
1859
1860                         if (mode == env->params->high_signed) {
1861                                 mode = env->params->low_signed;
1862                         } else {
1863                                 mode = env->params->low_unsigned;
1864                         }  /* if */
1865
1866                         dbg = get_irn_dbg_info(proj);
1867                         env->entries[idx]->low_word  =
1868                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, low_mode, new_projs[proj_nr]);
1869                         env->entries[idx]->high_word =
1870                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, mode, new_projs[proj_nr] + 1);
1871                 }  /* if */
1872         }  /* for */
1873         set_optimize(rem);
1874 }  /* lower_Start */
1875
1876 /**
1877  * Translate a Call.
1878  */
1879 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
1880         ir_graph *irg = current_ir_graph;
1881         ir_type  *tp = get_Call_type(node);
1882         ir_type  *call_tp;
1883         ir_node  **in, *proj, *results;
1884         int      n_params, n_res, need_lower = 0;
1885         int      i, j;
1886         long     *res_numbers = NULL;
1887         (void) mode;
1888
1889         if (is_lowered_type(tp)) {
1890                 call_tp = get_associated_type(tp);
1891         } else {
1892                 call_tp = tp;
1893         }  /* if */
1894
1895         assert(! is_lowered_type(call_tp));
1896
1897         n_params = get_method_n_params(call_tp);
1898         for (i = 0; i < n_params; ++i) {
1899                 ir_type *tp = get_method_param_type(call_tp, i);
1900
1901                 if (is_Primitive_type(tp)) {
1902                         ir_mode *mode = get_type_mode(tp);
1903
1904                         if (mode == env->params->high_signed ||
1905                                 mode == env->params->high_unsigned) {
1906                                 need_lower = 1;
1907                                 break;
1908                         }  /* if */
1909                 }  /* if */
1910         }  /* for */
1911         n_res = get_method_n_ress(call_tp);
1912         if (n_res > 0) {
1913                 NEW_ARR_A(long, res_numbers, n_res);
1914
1915                 for (i = j = 0; i < n_res; ++i, ++j) {
1916                         ir_type *tp = get_method_res_type(call_tp, i);
1917
1918                         res_numbers[i] = j;
1919                         if (is_Primitive_type(tp)) {
1920                                 ir_mode *mode = get_type_mode(tp);
1921
1922                                 if (mode == env->params->high_signed ||
1923                                         mode == env->params->high_unsigned) {
1924                                         need_lower = 1;
1925                                         ++j;
1926                                 }  /* if */
1927                         }  /* if */
1928                 }  /* for */
1929         }  /* if */
1930
1931         if (! need_lower)
1932                 return;
1933
1934         /* let's lower it */
1935         call_tp = lower_mtp(call_tp, env);
1936         set_Call_type(node, call_tp);
1937
1938         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1939
1940         in[0] = get_Call_mem(node);
1941         in[1] = get_Call_ptr(node);
1942
1943         for (j = 2, i = 0; i < n_params; ++i) {
1944                 ir_node *pred = get_Call_param(node, i);
1945                 int     idx = get_irn_idx(pred);
1946
1947                 if (env->entries[idx]) {
1948                         if (! env->entries[idx]->low_word) {
1949                                 /* not ready yet, wait */
1950                                 pdeq_putr(env->waitq, node);
1951                                 return;
1952                         }
1953                         in[j++] = env->entries[idx]->low_word;
1954                         in[j++] = env->entries[idx]->high_word;
1955                 } else {
1956                         in[j++] = pred;
1957                 }  /* if */
1958         }  /* for */
1959
1960         set_irn_in(node, j, in);
1961
1962         /* fix the results */
1963         results = NULL;
1964         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1965                 long proj_nr = get_Proj_proj(proj);
1966
1967                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
1968                         /* found the result proj */
1969                         results = proj;
1970                         break;
1971                 }  /* if */
1972         }  /* for */
1973
1974         if (results) {          /* there are results */
1975                 int rem = get_optimize();
1976
1977                 /* switch off optimization for new Proj nodes or they might be CSE'ed
1978                    with not patched one's */
1979                 set_optimize(0);
1980                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
1981                         if (get_Proj_pred(proj) == results) {
1982                                 long proj_nr = get_Proj_proj(proj);
1983                                 int idx;
1984
1985                                 /* found a result */
1986                                 set_Proj_proj(proj, res_numbers[proj_nr]);
1987                                 idx = get_irn_idx(proj);
1988                                 if (env->entries[idx]) {
1989                                         ir_mode *mode = get_irn_mode(proj);
1990                                         ir_mode *low_mode = env->params->low_unsigned;
1991                                         dbg_info *dbg;
1992
1993                                         if (mode == env->params->high_signed) {
1994                                                 mode = env->params->low_signed;
1995                                         } else {
1996                                                 mode = env->params->low_unsigned;
1997                                         }  /* if */
1998
1999                                         dbg = get_irn_dbg_info(proj);
2000                                         env->entries[idx]->low_word  =
2001                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, low_mode, res_numbers[proj_nr]);
2002                                         env->entries[idx]->high_word =
2003                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, mode, res_numbers[proj_nr] + 1);
2004                                 }  /* if */
2005                                 mark_irn_visited(proj);
2006                         }  /* if */
2007                 }  /* for */
2008                 set_optimize(rem);
2009         }
2010 }  /* lower_Call */
2011
2012 /**
2013  * Translate an Unknown into two.
2014  */
2015 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env) {
2016         int idx = get_irn_idx(node);
2017         ir_graph *irg = current_ir_graph;
2018
2019         env->entries[idx]->low_word  =
2020         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2021 }  /* lower_Unknown */
2022
2023 /**
2024  * Translate a Phi.
2025  *
2026  * First step: just create two templates
2027  */
2028 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
2029         ir_mode  *mode_l = env->params->low_unsigned;
2030         ir_graph *irg = current_ir_graph;
2031         ir_node  *block, *unk_l, *unk_h, *phi_l, *phi_h;
2032         ir_node  **inl, **inh;
2033         dbg_info *dbg;
2034         int      idx, i, arity = get_Phi_n_preds(phi);
2035         int      enq = 0;
2036
2037         idx = get_irn_idx(phi);
2038         if (env->entries[idx]->low_word) {
2039                 /* Phi nodes already build, check for inputs */
2040                 ir_node *phil = env->entries[idx]->low_word;
2041                 ir_node *phih = env->entries[idx]->high_word;
2042
2043                 for (i = 0; i < arity; ++i) {
2044                         ir_node *pred = get_Phi_pred(phi, i);
2045                         int     idx = get_irn_idx(pred);
2046
2047                         if (env->entries[idx]->low_word) {
2048                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2049                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2050                         } else {
2051                                 /* still not ready */
2052                                 pdeq_putr(env->waitq, phi);
2053                                 return;
2054                         }  /* if */
2055                 }  /* for */
2056         }  /* if */
2057
2058         /* first create a new in array */
2059         NEW_ARR_A(ir_node *, inl, arity);
2060         NEW_ARR_A(ir_node *, inh, arity);
2061         unk_l = new_r_Unknown(irg, mode_l);
2062         unk_h = new_r_Unknown(irg, mode);
2063
2064         for (i = 0; i < arity; ++i) {
2065                 ir_node *pred = get_Phi_pred(phi, i);
2066                 int     idx = get_irn_idx(pred);
2067
2068                 if (env->entries[idx]->low_word) {
2069                         inl[i] = env->entries[idx]->low_word;
2070                         inh[i] = env->entries[idx]->high_word;
2071                 } else {
2072                         inl[i] = unk_l;
2073                         inh[i] = unk_h;
2074                         enq = 1;
2075                 }  /* if */
2076         }  /* for */
2077
2078         dbg   = get_irn_dbg_info(phi);
2079         block = get_nodes_block(phi);
2080
2081         idx = get_irn_idx(phi);
2082         assert(idx < env->n_entries);
2083         env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, irg, block, arity, inl, mode_l);
2084         env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, irg, block, arity, inh, mode);
2085
2086         /* Don't forget to link the new Phi nodes into the block! */
2087         set_irn_link(phi_l, get_irn_link(block));
2088         set_irn_link(phi_h, phi_l);
2089         set_irn_link(block, phi_h);
2090
2091         if (enq) {
2092                 /* not yet finished */
2093                 pdeq_putr(env->waitq, phi);
2094         }  /* if */
2095 }  /* lower_Phi */
2096
2097 /**
2098  * Translate a Psi.
2099  */
2100 static void lower_Psi(ir_node *psi, ir_mode *mode, lower_env_t *env) {
2101         ir_graph *irg = current_ir_graph;
2102         ir_node  *block, *val;
2103         ir_node  **valsl, **valsh, **conds;
2104         dbg_info *dbg;
2105         int      idx, i, n_conds = get_Psi_n_conds(psi);
2106
2107         /* first create a new in array */
2108         NEW_ARR_A(ir_node *, valsl, n_conds + 1);
2109         NEW_ARR_A(ir_node *, valsh, n_conds + 1);
2110
2111         for (i = 0; i < n_conds; ++i) {
2112                 val = get_Psi_val(psi, i);
2113                 idx = get_irn_idx(val);
2114                 if (env->entries[idx]->low_word) {
2115                         /* Values already build */
2116                         valsl[i] = env->entries[idx]->low_word;
2117                         valsh[i] = env->entries[idx]->high_word;
2118                 } else {
2119                         /* still not ready */
2120                         pdeq_putr(env->waitq, psi);
2121                         return;
2122                 }  /* if */
2123         }  /* for */
2124         val = get_Psi_default(psi);
2125         idx = get_irn_idx(val);
2126         if (env->entries[idx]->low_word) {
2127                 /* Values already build */
2128                 valsl[i] = env->entries[idx]->low_word;
2129                 valsh[i] = env->entries[idx]->high_word;
2130         } else {
2131                 /* still not ready */
2132                 pdeq_putr(env->waitq, psi);
2133                 return;
2134         }  /* if */
2135
2136
2137         NEW_ARR_A(ir_node *, conds, n_conds);
2138         for (i = 0; i < n_conds; ++i) {
2139                 conds[i] = get_Psi_cond(psi, i);
2140         }  /* for */
2141
2142         dbg   = get_irn_dbg_info(psi);
2143         block = get_nodes_block(psi);
2144
2145         idx = get_irn_idx(psi);
2146         assert(idx < env->n_entries);
2147         env->entries[idx]->low_word  = new_rd_Psi(dbg, irg, block, n_conds, conds, valsl, mode);
2148         env->entries[idx]->high_word = new_rd_Psi(dbg, irg, block, n_conds, conds, valsh, mode);
2149 }  /* lower_Psi */
2150
2151 /**
2152  * check for opcodes that must always be lowered.
2153  */
2154 static int always_lower(ir_opcode code) {
2155         switch (code) {
2156         case iro_Proj:
2157         case iro_Start:
2158         case iro_Call:
2159         case iro_Return:
2160         case iro_Cond:
2161         case iro_Conv:
2162                 return 1;
2163         default:
2164                 return 0;
2165         }  /* switch */
2166 }  /* always_lower */
2167
2168 /**
2169  * lower boolean Proj(Cmp)
2170  */
2171 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env) {
2172         int      lidx, ridx;
2173         ir_node  *l, *r, *low, *high, *t, *res;
2174         pn_Cmp   pnc;
2175         ir_node  *blk;
2176         ir_graph *irg = current_ir_graph;
2177         dbg_info *db;
2178
2179         l    = get_Cmp_left(cmp);
2180         lidx = get_irn_idx(l);
2181         if (! env->entries[lidx]->low_word) {
2182                 /* still not ready */
2183                 return NULL;
2184         }  /* if */
2185
2186         r    = get_Cmp_right(cmp);
2187         ridx = get_irn_idx(r);
2188         if (! env->entries[ridx]->low_word) {
2189                 /* still not ready */
2190                 return NULL;
2191         }  /* if */
2192
2193         pnc  = get_Proj_proj(proj);
2194         blk  = get_nodes_block(cmp);
2195         db   = get_irn_dbg_info(cmp);
2196         low  = new_rd_Cmp(db, irg, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2197         high = new_rd_Cmp(db, irg, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2198
2199         if (pnc == pn_Cmp_Eq) {
2200                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2201                 res = new_rd_And(db, irg, blk,
2202                         new_r_Proj(irg, blk, low, mode_b, pnc),
2203                         new_r_Proj(irg, blk, high, mode_b, pnc),
2204                         mode_b);
2205         } else if (pnc == pn_Cmp_Lg) {
2206                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2207                 res = new_rd_Or(db, irg, blk,
2208                         new_r_Proj(irg, blk, low, mode_b, pnc),
2209                         new_r_Proj(irg, blk, high, mode_b, pnc),
2210                         mode_b);
2211         } else {
2212                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2213                 t = new_rd_And(db, irg, blk,
2214                         new_r_Proj(irg, blk, low, mode_b, pnc),
2215                         new_r_Proj(irg, blk, high, mode_b, pn_Cmp_Eq),
2216                         mode_b);
2217                 res = new_rd_Or(db, irg, blk,
2218                         new_r_Proj(irg, blk, high, mode_b, pnc & ~pn_Cmp_Eq),
2219                         t,
2220                         mode_b);
2221         }  /* if */
2222         return res;
2223 }  /* lower_boolean_Proj_Cmp */
2224
2225 /**
2226  * The type of a lower function.
2227  *
2228  * @param node   the node to be lowered
2229  * @param mode   the low mode for the destination node
2230  * @param env    the lower environment
2231  */
2232 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2233
2234 /**
2235  * Lower a node.
2236  */
2237 static void lower_ops(ir_node *node, void *env)
2238 {
2239         lower_env_t  *lenv = env;
2240         node_entry_t *entry;
2241         int          idx = get_irn_idx(node);
2242         ir_mode      *mode = get_irn_mode(node);
2243
2244         if (mode == mode_b || is_Psi(node)) {
2245                 int i;
2246
2247                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2248                         ir_node *proj = get_irn_n(node, i);
2249
2250                         if (is_Proj(proj)) {
2251                                 ir_node *cmp = get_Proj_pred(proj);
2252
2253                                 if (is_Cmp(cmp)) {
2254                                         ir_node *arg = get_Cmp_left(cmp);
2255
2256                                         mode = get_irn_mode(arg);
2257                                         if (mode == lenv->params->high_signed ||
2258                                                 mode == lenv->params->high_unsigned) {
2259                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2260
2261                                                 if (res == NULL) {
2262                                                         /* could not lower because predecessors not ready */
2263                                                         waitq_put(lenv->waitq, node);
2264                                                         return;
2265                                                 }  /* if */
2266                                                 set_irn_n(node, i, res);
2267                                         }  /* if */
2268                                 }  /* if */
2269                         }  /* if */
2270                 }  /* for */
2271         }  /* if */
2272
2273         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2274         if (entry || always_lower(get_irn_opcode(node))) {
2275                 ir_op      *op = get_irn_op(node);
2276                 lower_func func = (lower_func)op->ops.generic;
2277
2278                 if (func) {
2279                         mode = get_irn_op_mode(node);
2280
2281                         if (mode == lenv->params->high_signed)
2282                                 mode = lenv->params->low_signed;
2283                         else
2284                                 mode = lenv->params->low_unsigned;
2285
2286                         DB((dbg, LEVEL_1, "  %+F\n", node));
2287                         func(node, mode, lenv);
2288                 }  /* if */
2289         }  /* if */
2290 }  /* lower_ops */
2291
2292 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2293
2294 /**
2295  * Compare two op_mode_entry_t's.
2296  */
2297 static int cmp_op_mode(const void *elt, const void *key, size_t size) {
2298         const op_mode_entry_t *e1 = elt;
2299         const op_mode_entry_t *e2 = key;
2300         (void) size;
2301
2302         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2303 }  /* cmp_op_mode */
2304
2305 /**
2306  * Compare two conv_tp_entry_t's.
2307  */
2308 static int cmp_conv_tp(const void *elt, const void *key, size_t size) {
2309         const conv_tp_entry_t *e1 = elt;
2310         const conv_tp_entry_t *e2 = key;
2311         (void) size;
2312
2313         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2314 }  /* static int cmp_conv_tp */
2315
2316 /*
2317  * Do the lowering.
2318  */
2319 void lower_dw_ops(const lwrdw_param_t *param)
2320 {
2321         lower_env_t lenv;
2322         int i;
2323         ir_graph *rem;
2324
2325         if (! param)
2326                 return;
2327
2328         if (! param->enable)
2329                 return;
2330
2331         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2332
2333         assert(2 * get_mode_size_bits(param->low_signed)   == get_mode_size_bits(param->high_signed));
2334         assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
2335         assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
2336
2337         /* create the necessary maps */
2338         if (! prim_types)
2339                 prim_types = pmap_create();
2340         if (! intrinsic_fkt)
2341                 intrinsic_fkt = new_set(cmp_op_mode, iro_MaxOpcode);
2342         if (! conv_types)
2343                 conv_types = new_set(cmp_conv_tp, 16);
2344         if (! lowered_type)
2345                 lowered_type = pmap_create();
2346
2347         /* create a primitive unsigned and signed type */
2348         if (! tp_u)
2349                 tp_u = get_primitive_type(param->low_unsigned);
2350         if (! tp_s)
2351                 tp_s = get_primitive_type(param->low_signed);
2352
2353         /* create method types for the created binop calls */
2354         if (! binop_tp_u) {
2355                 binop_tp_u = new_type_method(IDENT("binop_u_intrinsic"), 4, 2);
2356                 set_method_param_type(binop_tp_u, 0, tp_u);
2357                 set_method_param_type(binop_tp_u, 1, tp_u);
2358                 set_method_param_type(binop_tp_u, 2, tp_u);
2359                 set_method_param_type(binop_tp_u, 3, tp_u);
2360                 set_method_res_type(binop_tp_u, 0, tp_u);
2361                 set_method_res_type(binop_tp_u, 1, tp_u);
2362         }  /* if */
2363         if (! binop_tp_s) {
2364                 binop_tp_s = new_type_method(IDENT("binop_s_intrinsic"), 4, 2);
2365                 set_method_param_type(binop_tp_s, 0, tp_u);
2366                 set_method_param_type(binop_tp_s, 1, tp_s);
2367                 set_method_param_type(binop_tp_s, 2, tp_u);
2368                 set_method_param_type(binop_tp_s, 3, tp_s);
2369                 set_method_res_type(binop_tp_s, 0, tp_u);
2370                 set_method_res_type(binop_tp_s, 1, tp_s);
2371         }  /* if */
2372         if (! shiftop_tp_u) {
2373                 shiftop_tp_u = new_type_method(IDENT("shiftop_u_intrinsic"), 3, 2);
2374                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2375                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2376                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2377                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2378                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2379         }  /* if */
2380         if (! shiftop_tp_s) {
2381                 shiftop_tp_s = new_type_method(IDENT("shiftop_s_intrinsic"), 3, 2);
2382                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2383                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2384                 /* beware: shift count is always mode_Iu */
2385                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2386                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2387                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2388         }  /* if */
2389         if (! unop_tp_u) {
2390                 unop_tp_u = new_type_method(IDENT("unop_u_intrinsic"), 2, 2);
2391                 set_method_param_type(unop_tp_u, 0, tp_u);
2392                 set_method_param_type(unop_tp_u, 1, tp_u);
2393                 set_method_res_type(unop_tp_u, 0, tp_u);
2394                 set_method_res_type(unop_tp_u, 1, tp_u);
2395         }  /* if */
2396         if (! unop_tp_s) {
2397                 unop_tp_s = new_type_method(IDENT("unop_s_intrinsic"), 2, 2);
2398                 set_method_param_type(unop_tp_s, 0, tp_u);
2399                 set_method_param_type(unop_tp_s, 1, tp_s);
2400                 set_method_res_type(unop_tp_s, 0, tp_u);
2401                 set_method_res_type(unop_tp_s, 1, tp_s);
2402         }  /* if */
2403
2404         lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), mode_Iu);
2405         lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), mode_Iu);
2406         lenv.waitq         = new_pdeq();
2407         lenv.params        = param;
2408
2409         /* first clear the generic function pointer for all ops */
2410         clear_irp_opcodes_generic_func();
2411
2412 #define LOWER2(op, fkt)   op_##op->ops.generic = (op_func)fkt
2413 #define LOWER(op)         LOWER2(op, lower_##op)
2414 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2415 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2416
2417         /* the table of all operations that must be lowered follows */
2418         LOWER(Load);
2419         LOWER(Store);
2420         LOWER(Const);
2421         LOWER(And);
2422         LOWER(Or);
2423         LOWER(Eor);
2424         LOWER(Not);
2425         LOWER(Cond);
2426         LOWER(Return);
2427         LOWER(Call);
2428         LOWER(Unknown);
2429         LOWER(Phi);
2430         LOWER(Psi);
2431         LOWER(Start);
2432
2433         LOWER_BIN(Add);
2434         LOWER_BIN(Sub);
2435         LOWER_BIN(Mul);
2436         LOWER(Shl);
2437         LOWER(Shr);
2438         LOWER(Shrs);
2439         LOWER(Rot);
2440         LOWER(DivMod);
2441         LOWER(Div);
2442         LOWER(Mod);
2443         LOWER_UN(Abs);
2444         LOWER_UN(Minus);
2445
2446         LOWER(Conv);
2447
2448 #undef LOWER_UN
2449 #undef LOWER_BIN
2450 #undef LOWER
2451 #undef LOWER2
2452
2453         /* transform all graphs */
2454         rem = current_ir_graph;
2455         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2456                 ir_graph *irg = get_irp_irg(i);
2457                 int n_idx;
2458
2459                 obstack_init(&lenv.obst);
2460
2461                 n_idx = get_irg_last_idx(irg);
2462                 lenv.n_entries = n_idx;
2463                 lenv.entries   = xmalloc(n_idx * sizeof(lenv.entries[0]));
2464                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2465
2466                 /* first step: link all nodes and allocate data */
2467                 lenv.flags = 0;
2468                 lenv.proj_2_block = pmap_create();
2469                 irg_walk_graph(irg, firm_clear_link, prepare_links, &lenv);
2470
2471                 if (lenv.flags & MUST_BE_LOWERED) {
2472                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2473
2474                         /* must do some work */
2475                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2476
2477                         /* last step: all waiting nodes */
2478                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2479                         current_ir_graph = irg;
2480                         while (! pdeq_empty(lenv.waitq)) {
2481                                 ir_node *node = pdeq_getl(lenv.waitq);
2482
2483                                 lower_ops(node, &lenv);
2484                         }  /* while */
2485
2486                         /* outs are invalid, we changed the graph */
2487                         set_irg_outs_inconsistent(irg);
2488
2489                         if (lenv.flags & CF_CHANGED) {
2490                                 /* control flow changed, dominance info is invalid */
2491                                 set_irg_doms_inconsistent(irg);
2492                                 set_irg_extblk_inconsistent(irg);
2493                                 set_irg_loopinfo_inconsistent(irg);
2494                         }  /* if */
2495                 }  /* if */
2496                 pmap_destroy(lenv.proj_2_block);
2497                 free(lenv.entries);
2498                 obstack_free(&lenv.obst, NULL);
2499         }  /* for */
2500         del_pdeq(lenv.waitq);
2501         current_ir_graph = rem;
2502 }  /* lower_dw_ops */
2503
2504 /* Default implementation. */
2505 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2506                                     const ir_mode *imode, const ir_mode *omode,
2507                                     void *context)
2508 {
2509         char buf[64];
2510         ident *id;
2511         ir_entity *ent;
2512         (void) context;
2513
2514         if (imode == omode) {
2515                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2516         } else {
2517                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2518                         get_mode_name(imode), get_mode_name(omode));
2519         }  /* if */
2520         id = new_id_from_str(buf);
2521
2522         ent = new_entity(get_glob_type(), id, method);
2523         set_entity_ld_ident(ent, get_entity_ident(ent));
2524         set_entity_visibility(ent, visibility_external_allocated);
2525         return ent;
2526 }  /* def_create_intrinsic_fkt */