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

   1 /*
   2  * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
   3  *
   4  * This file is part of libFirm.
   5  *
   6  * This file may be distributed and/or modified under the terms of the
   7  * GNU General Public License version 2 as published by the Free Software
   8  * Foundation and appearing in the file LICENSE.GPL included in the
   9  * packaging of this file.
  10  *
  11  * Licensees holding valid libFirm Professional Edition licenses may use
  12  * this file in accordance with the libFirm Commercial License.
  13  * Agreement provided with the Software.
  14  *
  15  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  16  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE.
  18  */
  19
  20 /**
  21  * @file
  22  * @brief   Lower Double word operations, ie 64bit -> 32bit, 32bit -> 16bit etc.
  23  * @date    8.10.2004
  24  * @author  Michael Beck
  25  * @version $Id$
  26  */
  27 #include "config.h"
  28
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <assert.h>
  32
  33 #include "error.h"
  34 #include "lowering.h"
  35 #include "irnode_t.h"
  36 #include "irgraph_t.h"
  37 #include "irmode_t.h"
  38 #include "iropt_t.h"
  39 #include "irgmod.h"
  40 #include "tv_t.h"
  41 #include "dbginfo_t.h"
  42 #include "iropt_dbg.h"
  43 #include "irflag_t.h"
  44 #include "firmstat.h"
  45 #include "irgwalk.h"
  46 #include "ircons.h"
  47 #include "irflag.h"
  48 #include "irtools.h"
  49 #include "debug.h"
  50 #include "set.h"
  51 #include "pmap.h"
  52 #include "pdeq.h"
  53 #include "irdump.h"
  54 #include "array_t.h"
  55 #include "irpass_t.h"
  56
  57 /** A map from mode to a primitive type. */
  58 static pmap *prim_types;
  59
  60 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  61 static set *intrinsic_fkt;
  62
  63 /** A map from (imode, omode) to conv function types. */
  64 static set *conv_types;
  65
  66 /** A map from a method type to its lowered type. */
  67 static pmap *lowered_type;
  68
  69 /** The types for the binop and unop intrinsics. */
  70 static ir_type *binop_tp_u, *binop_tp_s, *unop_tp_u, *unop_tp_s, *shiftop_tp_u, *shiftop_tp_s, *tp_s, *tp_u;
  71
  72 /** the debug handle */
  73 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  74
  75 /**
  76  * An entry in the (op, imode, omode) -> entity map.
  77  */
  78 typedef struct _op_mode_entry {
  79         const ir_op   *op;    /**< the op */
  80         const ir_mode *imode; /**< the input mode */
  81         const ir_mode *omode; /**< the output mode */
  82         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  83 } op_mode_entry_t;
  84
  85 /**
  86  * An entry in the (imode, omode) -> tp map.
  87  */
  88 typedef struct _conv_tp_entry {
  89         const ir_mode *imode; /**< the input mode */
  90         const ir_mode *omode; /**< the output mode */
  91         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
  92 } conv_tp_entry_t;
  93
  94 /**
  95  * Every double word node will be replaced,
  96  * we need some store to hold the replacement:
  97  */
  98 typedef struct _node_entry_t {
  99         ir_node *low_word;    /**< the low word */
 100         ir_node *high_word;   /**< the high word */
 101 } node_entry_t;
 102
 103 enum lower_flags {
 104         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 105         CF_CHANGED      = 2,  /**< control flow was changed */
 106 };
 107
 108 /**
 109  * The lower environment.
 110  */
 111 typedef struct _lower_env_t {
 112         node_entry_t **entries;       /**< entries per node */
 113         struct obstack obst;          /**< an obstack holding the temporary data */
 114         ir_type  *l_mtp;              /**< lowered method type of the current method */
 115         tarval   *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 116         tarval   *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 117         pdeq     *waitq;              /**< a wait queue of all nodes that must be handled later */
 118         pmap     *proj_2_block;       /**< a map from ProjX to its destination blocks */
 119         ident    *first_id;           /**< .l for little and .h for big endian */
 120         ident    *next_id;            /**< .h for little and .l for big endian */
 121         const lwrdw_param_t *params;  /**< transformation parameter */
 122         unsigned flags;               /**< some flags */
 123         int      n_entries;           /**< number of entries */
 124         ir_type  *value_param_tp;     /**< the old value param type */
 125 } lower_env_t;
 126
 127 /**
 128  * Get a primitive mode for a mode.
 129  */
 130 static ir_type *get_primitive_type(ir_mode *mode)
 131 {
 132         pmap_entry *entry = pmap_find(prim_types, mode);
 133         ir_type *tp;
 134         char buf[64];
 135
 136         if (entry)
 137                 return entry->value;
 138
 139         snprintf(buf, sizeof(buf), "_prim_%s", get_mode_name(mode));
 140         tp = new_type_primitive(mode);
 141
 142         pmap_insert(prim_types, mode, tp);
 143         return tp;
 144 }  /* get_primitive_type */
 145
 146 /**
 147  * Create a method type for a Conv emulation from imode to omode.
 148  */
 149 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env)
 150 {
 151         conv_tp_entry_t key, *entry;
 152         ir_type *mtd;
 153
 154         key.imode = imode;
 155         key.omode = omode;
 156         key.mtd   = NULL;
 157
 158         entry = set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 159         if (! entry->mtd) {
 160                 int n_param = 1, n_res = 1;
 161
 162                 if (imode == env->params->high_signed || imode == env->params->high_unsigned)
 163                         n_param = 2;
 164                 if (omode == env->params->high_signed || omode == env->params->high_unsigned)
 165                         n_res = 2;
 166
 167                 /* create a new one */
 168                 mtd = new_type_method(n_param, n_res);
 169
 170                 /* set param types and result types */
 171                 n_param = 0;
 172                 if (imode == env->params->high_signed) {
 173                         set_method_param_type(mtd, n_param++, tp_u);
 174                         set_method_param_type(mtd, n_param++, tp_s);
 175                 } else if (imode == env->params->high_unsigned) {
 176                         set_method_param_type(mtd, n_param++, tp_u);
 177                         set_method_param_type(mtd, n_param++, tp_u);
 178                 } else {
 179                         ir_type *tp = get_primitive_type(imode);
 180                         set_method_param_type(mtd, n_param++, tp);
 181                 }  /* if */
 182
 183                 n_res = 0;
 184                 if (omode == env->params->high_signed) {
 185                         set_method_res_type(mtd, n_res++, tp_u);
 186                         set_method_res_type(mtd, n_res++, tp_s);
 187                 } else if (omode == env->params->high_unsigned) {
 188                         set_method_res_type(mtd, n_res++, tp_u);
 189                         set_method_res_type(mtd, n_res++, tp_u);
 190                 } else {
 191                         ir_type *tp = get_primitive_type(omode);
 192                         set_method_res_type(mtd, n_res++, tp);
 193                 }  /* if */
 194                 entry->mtd = mtd;
 195         } else {
 196                 mtd = entry->mtd;
 197         }  /* if */
 198         return mtd;
 199 }  /* get_conv_type */
 200
 201 /**
 202  * Add an additional control flow input to a block.
 203  * Patch all Phi nodes. The new Phi inputs are copied from
 204  * old input number nr.
 205  */
 206 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 207 {
 208         int i, arity = get_irn_arity(block);
 209         ir_node **in, *phi;
 210
 211         assert(nr < arity);
 212
 213         NEW_ARR_A(ir_node *, in, arity + 1);
 214         for (i = 0; i < arity; ++i)
 215                 in[i] = get_irn_n(block, i);
 216         in[i] = cf;
 217
 218         set_irn_in(block, i + 1, in);
 219
 220         for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
 221                 for (i = 0; i < arity; ++i)
 222                         in[i] = get_irn_n(phi, i);
 223                 in[i] = in[nr];
 224                 set_irn_in(phi, i + 1, in);
 225         }  /* for */
 226 }  /* add_block_cf_input_nr */
 227
 228 /**
 229  * Add an additional control flow input to a block.
 230  * Patch all Phi nodes. The new Phi inputs are copied from
 231  * old input from cf tmpl.
 232  */
 233 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 234 {
 235         int i, arity = get_irn_arity(block);
 236         int nr = 0;
 237
 238         for (i = 0; i < arity; ++i) {
 239                 if (get_irn_n(block, i) == tmpl) {
 240                         nr = i;
 241                         break;
 242                 }  /* if */
 243         }  /* for */
 244         assert(i < arity);
 245         add_block_cf_input_nr(block, nr, cf);
 246 }  /* add_block_cf_input */
 247
 248 /**
 249  * Return the "operational" mode of a Firm node.
 250  */
 251 static ir_mode *get_irn_op_mode(ir_node *node)
 252 {
 253         switch (get_irn_opcode(node)) {
 254         case iro_Load:
 255                 return get_Load_mode(node);
 256         case iro_Store:
 257                 return get_irn_mode(get_Store_value(node));
 258         case iro_DivMod:
 259                 return get_irn_mode(get_DivMod_left(node));
 260         case iro_Div:
 261                 return get_irn_mode(get_Div_left(node));
 262         case iro_Mod:
 263                 return get_irn_mode(get_Mod_left(node));
 264         case iro_Cmp:
 265                 return get_irn_mode(get_Cmp_left(node));
 266         default:
 267                 return get_irn_mode(node);
 268         }  /* switch */
 269 }  /* get_irn_op_mode */
 270
 271 /**
 272  * Walker, prepare the node links.
 273  */
 274 static void prepare_links(ir_node *node, void *env)
 275 {
 276         lower_env_t  *lenv = env;
 277         ir_mode      *mode = get_irn_op_mode(node);
 278         node_entry_t *link;
 279         int          i, idx;
 280
 281         if (mode == lenv->params->high_signed ||
 282                 mode == lenv->params->high_unsigned) {
 283                 /* ok, found a node that will be lowered */
 284                 link = OALLOCZ(&lenv->obst, node_entry_t);
 285
 286                 idx = get_irn_idx(node);
 287                 if (idx >= lenv->n_entries) {
 288                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 289                         int old = lenv->n_entries;
 290                         int n_idx = idx + (idx >> 3);
 291
 292                         ARR_RESIZE(node_entry_t *, lenv->entries, n_idx);
 293                         memset(&lenv->entries[old], 0, (n_idx - old) * sizeof(lenv->entries[0]));
 294                         lenv->n_entries = n_idx;
 295                 }
 296                 lenv->entries[idx] = link;
 297                 lenv->flags |= MUST_BE_LOWERED;
 298         } else if (is_Conv(node)) {
 299                 /* Conv nodes have two modes */
 300                 ir_node *pred = get_Conv_op(node);
 301                 mode = get_irn_mode(pred);
 302
 303                 if (mode == lenv->params->high_signed ||
 304                         mode == lenv->params->high_unsigned) {
 305                         /* must lower this node either but don't need a link */
 306                         lenv->flags |= MUST_BE_LOWERED;
 307                 }  /* if */
 308                 return;
 309         }  /* if */
 310
 311         if (is_Proj(node)) {
 312                 /* link all Proj nodes to its predecessor:
 313                    Note that Tuple Proj's and its Projs are linked either. */
 314                 ir_node *pred = get_Proj_pred(node);
 315
 316                 set_irn_link(node, get_irn_link(pred));
 317                 set_irn_link(pred, node);
 318         } else if (is_Phi(node)) {
 319                 /* link all Phi nodes to its block */
 320                 ir_node *block = get_nodes_block(node);
 321                 add_Block_phi(block, node);
 322         } else if (is_Block(node)) {
 323                 /* fill the Proj -> Block map */
 324                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 325                         ir_node *pred = get_Block_cfgpred(node, i);
 326
 327                         if (is_Proj(pred))
 328                                 pmap_insert(lenv->proj_2_block, pred, node);
 329                 }  /* for */
 330         }  /* if */
 331 }  /* prepare_links */
 332
 333 /**
 334  * Translate a Constant: create two.
 335  */
 336 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env)
 337 {
 338         tarval   *tv, *tv_l, *tv_h;
 339         ir_node  *low, *high;
 340         dbg_info *dbg = get_irn_dbg_info(node);
 341         int      idx;
 342         ir_graph *irg = current_ir_graph;
 343         ir_mode  *low_mode = env->params->low_unsigned;
 344
 345         tv   = get_Const_tarval(node);
 346
 347         tv_l = tarval_convert_to(tv, low_mode);
 348         low  = new_rd_Const(dbg, irg, tv_l);
 349
 350         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 351         high = new_rd_Const(dbg, irg, tv_h);
 352
 353         idx = get_irn_idx(node);
 354         assert(idx < env->n_entries);
 355         env->entries[idx]->low_word  = low;
 356         env->entries[idx]->high_word = high;
 357 }  /* lower_Const */
 358
 359 /**
 360  * Translate a Load: create two.
 361  */
 362 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env)
 363 {
 364         ir_mode    *low_mode = env->params->low_unsigned;
 365         ir_graph   *irg = current_ir_graph;
 366         ir_node    *adr = get_Load_ptr(node);
 367         ir_node    *mem = get_Load_mem(node);
 368         ir_node    *low, *high, *proj;
 369         dbg_info   *dbg;
 370         ir_node    *block = get_nodes_block(node);
 371         int         idx;
 372         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 373                                  ? cons_volatile : 0;
 374
 375         if (env->params->little_endian) {
 376                 low  = adr;
 377                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 378         } else {
 379                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 380                 high = adr;
 381         }  /* if */
 382
 383         /* create two loads */
 384         dbg  = get_irn_dbg_info(node);
 385         low  = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 386         proj = new_r_Proj(low, mode_M, pn_Load_M);
 387         high = new_rd_Load(dbg, block, proj, high, mode, volatility);
 388
 389         idx = get_irn_idx(node);
 390         assert(idx < env->n_entries);
 391         env->entries[idx]->low_word  = low;
 392         env->entries[idx]->high_word = high;
 393
 394         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 395                 idx = get_irn_idx(proj);
 396
 397                 switch (get_Proj_proj(proj)) {
 398                 case pn_Load_M:         /* Memory result. */
 399                         /* put it to the second one */
 400                         set_Proj_pred(proj, high);
 401                         break;
 402                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 403                         /* put it to the first one */
 404                         set_Proj_pred(proj, low);
 405                         break;
 406                 case pn_Load_res:       /* Result of load operation. */
 407                         assert(idx < env->n_entries);
 408                         env->entries[idx]->low_word  = new_r_Proj(low,  low_mode, pn_Load_res);
 409                         env->entries[idx]->high_word = new_r_Proj(high, mode,     pn_Load_res);
 410                         break;
 411                 default:
 412                         assert(0 && "unexpected Proj number");
 413                 }  /* switch */
 414                 /* mark this proj: we have handled it already, otherwise we might fall into
 415                  * out new nodes. */
 416                 mark_irn_visited(proj);
 417         }  /* for */
 418 }  /* lower_Load */
 419
 420 /**
 421  * Translate a Store: create two.
 422  */
 423 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env)
 424 {
 425         ir_graph     *irg;
 426         ir_node      *block, *adr, *mem;
 427         ir_node      *low, *high, *irn, *proj;
 428         dbg_info     *dbg;
 429         int           idx;
 430         node_entry_t *entry;
 431         ir_cons_flags    volatility = get_Store_volatility(node) == volatility_is_volatile
 432                                    ? cons_volatile : 0;
 433         (void) mode;
 434
 435         irn = get_Store_value(node);
 436         entry = env->entries[get_irn_idx(irn)];
 437         assert(entry);
 438
 439         if (! entry->low_word) {
 440                 /* not ready yet, wait */
 441                 pdeq_putr(env->waitq, node);
 442                 return;
 443         }  /* if */
 444
 445         irg = current_ir_graph;
 446         adr = get_Store_ptr(node);
 447         mem = get_Store_mem(node);
 448         block = get_nodes_block(node);
 449
 450         if (env->params->little_endian) {
 451                 low  = adr;
 452                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 453         } else {
 454                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 455                 high = adr;
 456         }  /* if */
 457
 458         /* create two Stores */
 459         dbg = get_irn_dbg_info(node);
 460         low  = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 461         proj = new_r_Proj(low, mode_M, pn_Store_M);
 462         high = new_rd_Store(dbg, block, proj, high, entry->high_word, volatility);
 463
 464         idx = get_irn_idx(node);
 465         assert(idx < env->n_entries);
 466         env->entries[idx]->low_word  = low;
 467         env->entries[idx]->high_word = high;
 468
 469         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 470                 idx = get_irn_idx(proj);
 471
 472                 switch (get_Proj_proj(proj)) {
 473                 case pn_Store_M:         /* Memory result. */
 474                         /* put it to the second one */
 475                         set_Proj_pred(proj, high);
 476                         break;
 477                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 478                         /* put it to the first one */
 479                         set_Proj_pred(proj, low);
 480                         break;
 481                 default:
 482                         assert(0 && "unexpected Proj number");
 483                 }  /* switch */
 484                 /* mark this proj: we have handled it already, otherwise we might fall into
 485                  * out new nodes. */
 486                 mark_irn_visited(proj);
 487         }  /* for */
 488 }  /* lower_Store */
 489
 490 /**
 491  * Return a node containing the address of the intrinsic emulation function.
 492  *
 493  * @param method  the method type of the emulation function
 494  * @param op      the emulated ir_op
 495  * @param imode   the input mode of the emulated opcode
 496  * @param omode   the output mode of the emulated opcode
 497  * @param env     the lower environment
 498  */
 499 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 500                                       ir_mode *imode, ir_mode *omode,
 501                                       lower_env_t *env)
 502 {
 503         symconst_symbol sym;
 504         ir_entity *ent;
 505         op_mode_entry_t key, *entry;
 506
 507         key.op    = op;
 508         key.imode = imode;
 509         key.omode = omode;
 510         key.ent   = NULL;
 511
 512         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 513                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 514         if (! entry->ent) {
 515                 /* create a new one */
 516                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 517
 518                 assert(ent && "Intrinsic creator must return an entity");
 519                 entry->ent = ent;
 520         } else {
 521                 ent = entry->ent;
 522         }  /* if */
 523         sym.entity_p = ent;
 524         return new_r_SymConst(current_ir_graph, mode_P_code, sym, symconst_addr_ent);
 525 }  /* get_intrinsic_address */
 526
 527 /**
 528  * Translate a Div.
 529  *
 530  * Create an intrinsic Call.
 531  */
 532 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env)
 533 {
 534         ir_node  *block, *irn, *call, *proj;
 535         ir_node  *in[4];
 536         ir_mode  *opmode;
 537         dbg_info *dbg;
 538         ir_type  *mtp;
 539         int      idx;
 540         node_entry_t *entry;
 541
 542         irn   = get_Div_left(node);
 543         entry = env->entries[get_irn_idx(irn)];
 544         assert(entry);
 545
 546         if (! entry->low_word) {
 547                 /* not ready yet, wait */
 548                 pdeq_putr(env->waitq, node);
 549                 return;
 550         }  /* if */
 551
 552         in[0] = entry->low_word;
 553         in[1] = entry->high_word;
 554
 555         irn   = get_Div_right(node);
 556         entry = env->entries[get_irn_idx(irn)];
 557         assert(entry);
 558
 559         if (! entry->low_word) {
 560                 /* not ready yet, wait */
 561                 pdeq_putr(env->waitq, node);
 562                 return;
 563         }  /* if */
 564
 565         in[2] = entry->low_word;
 566         in[3] = entry->high_word;
 567
 568         dbg   = get_irn_dbg_info(node);
 569         block = get_nodes_block(node);
 570
 571         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 572         opmode = get_irn_op_mode(node);
 573         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 574         call = new_rd_Call(dbg, block, get_Div_mem(node), irn, 4, in, mtp);
 575         set_irn_pinned(call, get_irn_pinned(node));
 576         irn = new_r_Proj(call, mode_T, pn_Call_T_result);
 577
 578         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 579                 switch (get_Proj_proj(proj)) {
 580                 case pn_Div_M:         /* Memory result. */
 581                         /* reroute to the call */
 582                         set_Proj_pred(proj, call);
 583                         set_Proj_proj(proj, pn_Call_M);
 584                         break;
 585                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 586                         /* reroute to the call */
 587                         set_Proj_pred(proj, call);
 588                         set_Proj_proj(proj, pn_Call_X_except);
 589                         break;
 590                 case pn_Div_res:       /* Result of computation. */
 591                         idx = get_irn_idx(proj);
 592                         assert(idx < env->n_entries);
 593                         env->entries[idx]->low_word  = new_r_Proj(irn, env->params->low_unsigned, 0);
 594                         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 595                         break;
 596                 default:
 597                         assert(0 && "unexpected Proj number");
 598                 }  /* switch */
 599                 /* mark this proj: we have handled it already, otherwise we might fall into
 600                  * out new nodes. */
 601                 mark_irn_visited(proj);
 602         }  /* for */
 603 }  /* lower_Div */
 604
 605 /**
 606  * Translate a Mod.
 607  *
 608  * Create an intrinsic Call.
 609  */
 610 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env)
 611 {
 612         ir_node  *block, *proj, *irn, *call;
 613         ir_node  *in[4];
 614         ir_mode  *opmode;
 615         dbg_info *dbg;
 616         ir_type  *mtp;
 617         int      idx;
 618         node_entry_t *entry;
 619
 620         irn   = get_Mod_left(node);
 621         entry = env->entries[get_irn_idx(irn)];
 622         assert(entry);
 623
 624         if (! entry->low_word) {
 625                 /* not ready yet, wait */
 626                 pdeq_putr(env->waitq, node);
 627                 return;
 628         }  /* if */
 629
 630         in[0] = entry->low_word;
 631         in[1] = entry->high_word;
 632
 633         irn   = get_Mod_right(node);
 634         entry = env->entries[get_irn_idx(irn)];
 635         assert(entry);
 636
 637         if (! entry->low_word) {
 638                 /* not ready yet, wait */
 639                 pdeq_putr(env->waitq, node);
 640                 return;
 641         }  /* if */
 642
 643         in[2] = entry->low_word;
 644         in[3] = entry->high_word;
 645
 646         dbg   = get_irn_dbg_info(node);
 647         block = get_nodes_block(node);
 648
 649         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 650         opmode = get_irn_op_mode(node);
 651         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 652         call = new_rd_Call(dbg, block, get_Mod_mem(node), irn, 4, in, mtp);
 653         set_irn_pinned(call, get_irn_pinned(node));
 654         irn = new_r_Proj(call, mode_T, pn_Call_T_result);
 655
 656         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 657                 switch (get_Proj_proj(proj)) {
 658                 case pn_Mod_M:         /* Memory result. */
 659                         /* reroute to the call */
 660                         set_Proj_pred(proj, call);
 661                         set_Proj_proj(proj, pn_Call_M);
 662                         break;
 663                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 664                         /* reroute to the call */
 665                         set_Proj_pred(proj, call);
 666                         set_Proj_proj(proj, pn_Call_X_except);
 667                         break;
 668                 case pn_Mod_res:       /* Result of computation. */
 669                         idx = get_irn_idx(proj);
 670                         assert(idx < env->n_entries);
 671                         env->entries[idx]->low_word  = new_r_Proj(irn, env->params->low_unsigned, 0);
 672                         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 673                         break;
 674                 default:
 675                         assert(0 && "unexpected Proj number");
 676                 }  /* switch */
 677                 /* mark this proj: we have handled it already, otherwise we might fall into
 678                  * out new nodes. */
 679                 mark_irn_visited(proj);
 680         }  /* for */
 681 }  /* lower_Mod */
 682
 683 /**
 684  * Translate a DivMod.
 685  *
 686  * Create two intrinsic Calls.
 687  */
 688 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env)
 689 {
 690         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod;
 691         ir_node  *resDiv = NULL;
 692         ir_node  *resMod = NULL;
 693         ir_node  *in[4];
 694         ir_mode  *opmode;
 695         dbg_info *dbg;
 696         ir_type  *mtp;
 697         int      idx;
 698         node_entry_t *entry;
 699         unsigned flags = 0;
 700
 701         /* check if both results are needed */
 702         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 703                 switch (get_Proj_proj(proj)) {
 704                 case pn_DivMod_res_div: flags |= 1; break;
 705                 case pn_DivMod_res_mod: flags |= 2; break;
 706                 default: break;
 707                 }  /* switch */
 708         }  /* for */
 709
 710         irn   = get_DivMod_left(node);
 711         entry = env->entries[get_irn_idx(irn)];
 712         assert(entry);
 713
 714         if (! entry->low_word) {
 715                 /* not ready yet, wait */
 716                 pdeq_putr(env->waitq, node);
 717                 return;
 718         }  /* if */
 719
 720         in[0] = entry->low_word;
 721         in[1] = entry->high_word;
 722
 723         irn   = get_DivMod_right(node);
 724         entry = env->entries[get_irn_idx(irn)];
 725         assert(entry);
 726
 727         if (! entry->low_word) {
 728                 /* not ready yet, wait */
 729                 pdeq_putr(env->waitq, node);
 730                 return;
 731         }  /* if */
 732
 733         in[2] = entry->low_word;
 734         in[3] = entry->high_word;
 735
 736         dbg   = get_irn_dbg_info(node);
 737         block = get_nodes_block(node);
 738
 739         mem = get_DivMod_mem(node);
 740
 741         callDiv = callMod = NULL;
 742         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 743         if (flags & 1) {
 744                 opmode = get_irn_op_mode(node);
 745                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, env);
 746                 callDiv = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 747                 set_irn_pinned(callDiv, get_irn_pinned(node));
 748                 resDiv = new_r_Proj(callDiv, mode_T, pn_Call_T_result);
 749         }  /* if */
 750         if (flags & 2) {
 751                 if (flags & 1)
 752                         mem = new_r_Proj(callDiv, mode_M, pn_Call_M);
 753                 opmode = get_irn_op_mode(node);
 754                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, env);
 755                 callMod = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 756                 set_irn_pinned(callMod, get_irn_pinned(node));
 757                 resMod = new_r_Proj(callMod, mode_T, pn_Call_T_result);
 758         }  /* if */
 759
 760         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 761                 switch (get_Proj_proj(proj)) {
 762                 case pn_DivMod_M:         /* Memory result. */
 763                         /* reroute to the first call */
 764                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 765                         set_Proj_proj(proj, pn_Call_M);
 766                         break;
 767                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 768                         /* reroute to the first call */
 769                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 770                         set_Proj_proj(proj, pn_Call_X_except);
 771                         break;
 772                 case pn_DivMod_res_div:   /* Result of Div. */
 773                         idx = get_irn_idx(proj);
 774                         assert(idx < env->n_entries);
 775                         env->entries[idx]->low_word  = new_r_Proj(resDiv, env->params->low_unsigned, 0);
 776                         env->entries[idx]->high_word = new_r_Proj(resDiv, mode,                      1);
 777                         break;
 778                 case pn_DivMod_res_mod:   /* Result of Mod. */
 779                         idx = get_irn_idx(proj);
 780                         env->entries[idx]->low_word  = new_r_Proj(resMod, env->params->low_unsigned, 0);
 781                         env->entries[idx]->high_word = new_r_Proj(resMod, mode,                      1);
 782                         break;
 783                 default:
 784                         assert(0 && "unexpected Proj number");
 785                 }  /* switch */
 786                 /* mark this proj: we have handled it already, otherwise we might fall into
 787                  * out new nodes. */
 788                 mark_irn_visited(proj);
 789         }  /* for */
 790 }  /* lower_DivMod */
 791
 792 /**
 793  * Translate a Binop.
 794  *
 795  * Create an intrinsic Call.
 796  */
 797 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env)
 798 {
 799         ir_node  *block, *irn;
 800         ir_node  *in[4];
 801         dbg_info *dbg;
 802         ir_type  *mtp;
 803         int      idx;
 804         ir_graph *irg;
 805         node_entry_t *entry;
 806
 807         irn   = get_binop_left(node);
 808         entry = env->entries[get_irn_idx(irn)];
 809         assert(entry);
 810
 811         if (! entry->low_word) {
 812                 /* not ready yet, wait */
 813                 pdeq_putr(env->waitq, node);
 814                 return;
 815         }  /* if */
 816
 817         in[0] = entry->low_word;
 818         in[1] = entry->high_word;
 819
 820         irn   = get_binop_right(node);
 821         entry = env->entries[get_irn_idx(irn)];
 822         assert(entry);
 823
 824         if (! entry->low_word) {
 825                 /* not ready yet, wait */
 826                 pdeq_putr(env->waitq, node);
 827                 return;
 828         }  /* if */
 829
 830         in[2] = entry->low_word;
 831         in[3] = entry->high_word;
 832
 833         dbg   = get_irn_dbg_info(node);
 834         block = get_nodes_block(node);
 835         irg   = current_ir_graph;
 836
 837         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 838         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 839         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 840                 irn, 4, in, mtp);
 841         set_irn_pinned(irn, get_irn_pinned(node));
 842         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
 843
 844         idx = get_irn_idx(node);
 845         assert(idx < env->n_entries);
 846         env->entries[idx]->low_word  = new_r_Proj(irn, env->params->low_unsigned, 0);
 847         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 848 }  /* lower_Binop */
 849
 850 /**
 851  * Translate a Shiftop.
 852  *
 853  * Create an intrinsic Call.
 854  */
 855 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env)
 856 {
 857         ir_node  *block, *irn;
 858         ir_node  *in[3];
 859         dbg_info *dbg;
 860         ir_type  *mtp;
 861         int      idx;
 862         ir_graph *irg;
 863         node_entry_t *entry;
 864
 865         irn   = get_binop_left(node);
 866         entry = env->entries[get_irn_idx(irn)];
 867         assert(entry);
 868
 869         if (! entry->low_word) {
 870                 /* not ready yet, wait */
 871                 pdeq_putr(env->waitq, node);
 872                 return;
 873         }  /* if */
 874
 875         in[0] = entry->low_word;
 876         in[1] = entry->high_word;
 877
 878         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 879         in[2] = get_binop_right(node);
 880         assert(get_irn_mode(in[2]) != env->params->high_signed
 881                         && get_irn_mode(in[2]) != env->params->high_unsigned);
 882
 883         dbg   = get_irn_dbg_info(node);
 884         block = get_nodes_block(node);
 885         irg  = current_ir_graph;
 886
 887         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 888         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 889         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 890                 irn, 3, in, mtp);
 891         set_irn_pinned(irn, get_irn_pinned(node));
 892         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
 893
 894         idx = get_irn_idx(node);
 895         assert(idx < env->n_entries);
 896         env->entries[idx]->low_word  = new_r_Proj(irn, env->params->low_unsigned, 0);
 897         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 898 }  /* lower_Shiftop */
 899
 900 /**
 901  * Translate a Shr and handle special cases.
 902  */
 903 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env)
 904 {
 905         ir_node  *right = get_Shr_right(node);
 906         ir_graph *irg = current_ir_graph;
 907
 908         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 909                 tarval *tv = get_Const_tarval(right);
 910
 911                 if (tarval_is_long(tv) &&
 912                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 913                         ir_node *block = get_nodes_block(node);
 914                         ir_node *left = get_Shr_left(node);
 915                         ir_node *c;
 916                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 917                         int idx = get_irn_idx(left);
 918
 919                         left = env->entries[idx]->high_word;
 920                         if (left == NULL) {
 921                                 /* not ready yet, wait */
 922                                 pdeq_putr(env->waitq, node);
 923                                 return;
 924                         }
 925
 926                         idx = get_irn_idx(node);
 927
 928                         if (shf_cnt > 0) {
 929                                 c = new_r_Const_long(irg, env->params->low_unsigned, shf_cnt);
 930                                 env->entries[idx]->low_word = new_r_Shr(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, 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 {
 947         ir_node  *right = get_Shl_right(node);
 948         ir_graph *irg = current_ir_graph;
 949
 950         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 951                 tarval *tv = get_Const_tarval(right);
 952
 953                 if (tarval_is_long(tv) &&
 954                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 955                         ir_mode *mode_l;
 956                         ir_node *block = get_nodes_block(node);
 957                         ir_node *left = get_Shl_left(node);
 958                         ir_node *c;
 959                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 960                         int idx = get_irn_idx(left);
 961
 962                         left = new_r_Conv(block, env->entries[idx]->low_word, mode);
 963                         idx = get_irn_idx(node);
 964
 965                         mode_l = env->params->low_unsigned;
 966                         if (shf_cnt > 0) {
 967                                 c = new_r_Const_long(irg, mode_l, shf_cnt);
 968                                 env->entries[idx]->high_word = new_r_Shl(block, left, c, mode);
 969                         } else {
 970                                 env->entries[idx]->high_word = left;
 971                         }  /* if */
 972                         env->entries[idx]->low_word  = new_r_Const(irg, get_mode_null(mode_l));
 973
 974                         return;
 975                 }  /* if */
 976         }  /* if */
 977         lower_Shiftop(node, mode, env);
 978 }  /* lower_Shl */
 979
 980 /**
 981  * Translate a Shrs and handle special cases.
 982  */
 983 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env)
 984 {
 985         ir_node  *right = get_Shrs_right(node);
 986         ir_graph *irg = current_ir_graph;
 987
 988         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 989                 tarval *tv = get_Const_tarval(right);
 990
 991                 if (tarval_is_long(tv) &&
 992                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 993                         ir_node *block   = get_nodes_block(node);
 994                         ir_node *left    = get_Shrs_left(node);
 995                         long     shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 996                         int      idx     = get_irn_idx(left);
 997                         ir_mode *mode_l;
 998                         ir_node *low;
 999                         ir_node *c;
1000
1001                         left = env->entries[idx]->high_word;
1002                         idx = get_irn_idx(node);
1003
1004                         mode_l = env->params->low_unsigned;
1005                         if (shf_cnt > 0) {
1006                                 c   = new_r_Const_long(irg, mode_l, shf_cnt);
1007                                 low = new_r_Shrs(block, left, c, mode);
1008                         } else {
1009                                 low = left;
1010                         }  /* if */
1011                         /* low word is expected to have mode_l */
1012                         env->entries[idx]->low_word = new_r_Conv(block, low, mode_l);
1013
1014                         c = new_r_Const_long(irg, mode_l, get_mode_size_bits(mode) - 1);
1015                         env->entries[idx]->high_word = new_r_Shrs(block, left, c, mode);
1016
1017                         return;
1018                 }  /* if */
1019         }  /* if */
1020         lower_Shiftop(node, mode, env);
1021 }  /* lower_Shrs */
1022
1023 /**
1024  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1025  */
1026 static void prepare_links_and_handle_rotl(ir_node *node, void *env)
1027 {
1028         lower_env_t *lenv = env;
1029
1030         if (is_Rotl(node)) {
1031                 ir_mode *mode = get_irn_op_mode(node);
1032                         if (mode == lenv->params->high_signed ||
1033                             mode == lenv->params->high_unsigned) {
1034                                 ir_node  *right = get_Rotl_right(node);
1035                                 ir_node  *left, *shl, *shr, *or, *block, *sub, *c;
1036                                 ir_mode  *omode, *rmode;
1037                                 dbg_info *dbg;
1038                                 optimization_state_t state;
1039
1040                                 if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1041                                         tarval *tv = get_Const_tarval(right);
1042
1043                                         if (tarval_is_long(tv) &&
1044                                             get_tarval_long(tv) == (long)get_mode_size_bits(mode)) {
1045                                                 /* will be optimized in lower_Rotl() */
1046                                                 return;
1047                                         }
1048                                 }
1049
1050                                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) and lower those */
1051                                 dbg   = get_irn_dbg_info(node);
1052                                 omode = get_irn_mode(node);
1053                                 left  = get_Rotl_left(node);
1054                                 block = get_nodes_block(node);
1055                                 shl   = new_rd_Shl(dbg, block, left, right, omode);
1056                                 rmode = get_irn_mode(right);
1057                                 c     = new_Const_long(rmode, get_mode_size_bits(omode));
1058                                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
1059                                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
1060
1061                                 /* optimization must be switched off here, or we will get the Rotl back */
1062                                 save_optimization_state(&state);
1063                                 set_opt_algebraic_simplification(0);
1064                                 or = new_rd_Or(dbg, block, shl, shr, omode);
1065                                 restore_optimization_state(&state);
1066
1067                                 exchange(node, or);
1068
1069                                 /* do lowering on the new nodes */
1070                                 prepare_links(shl, env);
1071                                 prepare_links(c, env);
1072                                 prepare_links(sub, env);
1073                                 prepare_links(shr, env);
1074                                 prepare_links(or, env);
1075                         }
1076         } else {
1077                 prepare_links(node, env);
1078         }
1079 }
1080
1081 /**
1082  * Translate a special case Rotl(x, sizeof(w)).
1083  */
1084 static void lower_Rotl(ir_node *node, ir_mode *mode, lower_env_t *env)
1085 {
1086         ir_node *right = get_Rotl_right(node);
1087         ir_node *left = get_Rotl_left(node);
1088         ir_node *h, *l;
1089         int idx = get_irn_idx(left);
1090         (void) right;
1091         (void) mode;
1092
1093         assert(get_mode_arithmetic(mode) == irma_twos_complement &&
1094                is_Const(right) && tarval_is_long(get_Const_tarval(right)) &&
1095                get_tarval_long(get_Const_tarval(right)) == (long)get_mode_size_bits(mode));
1096
1097         l = env->entries[idx]->low_word;
1098         h = env->entries[idx]->high_word;
1099         idx = get_irn_idx(node);
1100
1101         env->entries[idx]->low_word  = h;
1102         env->entries[idx]->high_word = l;
1103 }  /* lower_Rotl */
1104
1105 /**
1106  * Translate an Unop.
1107  *
1108  * Create an intrinsic Call.
1109  */
1110 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env)
1111 {
1112         ir_node  *block, *irn;
1113         ir_node  *in[2];
1114         dbg_info *dbg;
1115         ir_type  *mtp;
1116         int      idx;
1117         node_entry_t *entry;
1118
1119         irn   = get_unop_op(node);
1120         entry = env->entries[get_irn_idx(irn)];
1121         assert(entry);
1122
1123         if (! entry->low_word) {
1124                 /* not ready yet, wait */
1125                 pdeq_putr(env->waitq, node);
1126                 return;
1127         }  /* if */
1128
1129         in[0] = entry->low_word;
1130         in[1] = entry->high_word;
1131
1132         dbg   = get_irn_dbg_info(node);
1133         block = get_nodes_block(node);
1134
1135         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1136         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
1137         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
1138                 irn, 2, in, mtp);
1139         set_irn_pinned(irn, get_irn_pinned(node));
1140         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
1141
1142         idx = get_irn_idx(node);
1143         assert(idx < env->n_entries);
1144         env->entries[idx]->low_word  = new_r_Proj(irn, env->params->low_unsigned, 0);
1145         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
1146 }  /* lower_Unop */
1147
1148 /**
1149  * Translate a logical Binop.
1150  *
1151  * Create two logical Binops.
1152  */
1153 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1154                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1155         ir_node  *block, *irn;
1156         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1157         dbg_info *dbg;
1158         int      idx;
1159         ir_graph *irg;
1160         node_entry_t *entry;
1161
1162         irn   = get_binop_left(node);
1163         entry = env->entries[get_irn_idx(irn)];
1164         assert(entry);
1165
1166         if (! entry->low_word) {
1167                 /* not ready yet, wait */
1168                 pdeq_putr(env->waitq, node);
1169                 return;
1170         }  /* if */
1171
1172         lop_l = entry->low_word;
1173         lop_h = entry->high_word;
1174
1175         irn   = get_binop_right(node);
1176         entry = env->entries[get_irn_idx(irn)];
1177         assert(entry);
1178
1179         if (! entry->low_word) {
1180                 /* not ready yet, wait */
1181                 pdeq_putr(env->waitq, node);
1182                 return;
1183         }  /* if */
1184
1185         rop_l = entry->low_word;
1186         rop_h = entry->high_word;
1187
1188         dbg = get_irn_dbg_info(node);
1189         block = get_nodes_block(node);
1190
1191         idx = get_irn_idx(node);
1192         assert(idx < env->n_entries);
1193         irg = current_ir_graph;
1194         env->entries[idx]->low_word  = constr_rd(dbg, block, lop_l, rop_l, env->params->low_unsigned);
1195         env->entries[idx]->high_word = constr_rd(dbg, block, lop_h, rop_h, mode);
1196 }  /* lower_Binop_logical */
1197
1198 /** create a logical operation transformation */
1199 #define lower_logical(op)                                                \
1200 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1201         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1202 }
1203
1204 lower_logical(And)
1205 lower_logical(Or)
1206 lower_logical(Eor)
1207
1208 /**
1209  * Translate a Not.
1210  *
1211  * Create two logical Nots.
1212  */
1213 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env)
1214 {
1215         ir_node  *block, *irn;
1216         ir_node  *op_l, *op_h;
1217         dbg_info *dbg;
1218         int      idx;
1219         node_entry_t *entry;
1220
1221         irn   = get_Not_op(node);
1222         entry = env->entries[get_irn_idx(irn)];
1223         assert(entry);
1224
1225         if (! entry->low_word) {
1226                 /* not ready yet, wait */
1227                 pdeq_putr(env->waitq, node);
1228                 return;
1229         }  /* if */
1230
1231         op_l = entry->low_word;
1232         op_h = entry->high_word;
1233
1234         dbg   = get_irn_dbg_info(node);
1235         block = get_nodes_block(node);
1236
1237         idx = get_irn_idx(node);
1238         assert(idx < env->n_entries);
1239         env->entries[idx]->low_word  = new_rd_Not(dbg, block, op_l, env->params->low_unsigned);
1240         env->entries[idx]->high_word = new_rd_Not(dbg, block, op_h, mode);
1241 }  /* lower_Not */
1242
1243 /**
1244  * Translate a Cond.
1245  */
1246 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env)
1247 {
1248         ir_node *cmp, *left, *right, *block;
1249         ir_node *sel = get_Cond_selector(node);
1250         ir_mode *m = get_irn_mode(sel);
1251         int     idx;
1252         (void) mode;
1253
1254         if (m == mode_b) {
1255                 node_entry_t *lentry, *rentry;
1256                 ir_node  *proj, *projT = NULL, *projF = NULL;
1257                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1258                 ir_node  *projHF, *projHT;
1259                 ir_node  *dst_blk;
1260                 pn_Cmp   pnc;
1261                 ir_graph *irg;
1262                 dbg_info *dbg;
1263
1264                 if (!is_Proj(sel))
1265                         return;
1266
1267                 cmp   = get_Proj_pred(sel);
1268                 if (!is_Cmp(cmp))
1269                         return;
1270
1271                 left  = get_Cmp_left(cmp);
1272                 idx   = get_irn_idx(left);
1273                 lentry = env->entries[idx];
1274
1275                 if (! lentry) {
1276                         /* a normal Cmp */
1277                         return;
1278                 }  /* if */
1279
1280                 right = get_Cmp_right(cmp);
1281                 idx   = get_irn_idx(right);
1282                 rentry = env->entries[idx];
1283                 assert(rentry);
1284
1285                 if (! lentry->low_word || !rentry->low_word) {
1286                         /* not yet ready */
1287                         pdeq_putr(env->waitq, node);
1288                         return;
1289                 }  /* if */
1290
1291                 /* all right, build the code */
1292                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1293                         long proj_nr = get_Proj_proj(proj);
1294
1295                         if (proj_nr == pn_Cond_true) {
1296                                 assert(projT == NULL && "more than one Proj(true)");
1297                                 projT = proj;
1298                         } else {
1299                                 assert(proj_nr == pn_Cond_false);
1300                                 assert(projF == NULL && "more than one Proj(false)");
1301                                 projF = proj;
1302                         }  /* if */
1303                         mark_irn_visited(proj);
1304                 }  /* for */
1305                 assert(projT && projF);
1306
1307                 /* create a new high compare */
1308                 block = get_nodes_block(node);
1309                 irg   = get_Block_irg(block);
1310                 dbg   = get_irn_dbg_info(cmp);
1311                 pnc   = get_Proj_proj(sel);
1312
1313                 if (is_Const(right) && is_Const_null(right)) {
1314                         if (pnc == pn_Cmp_Eq || pnc == pn_Cmp_Lg) {
1315                                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1316                                 ir_mode *mode = env->params->low_unsigned;
1317                                 ir_node *low  = new_r_Conv(block, lentry->low_word, mode);
1318                                 ir_node *high = new_r_Conv(block, lentry->high_word, mode);
1319                                 ir_node *or   = new_rd_Or(dbg, block, low, high, mode);
1320                                 ir_node *cmp  = new_rd_Cmp(dbg, block, or, new_Const_long(mode, 0));
1321
1322                                 ir_node *proj = new_r_Proj(cmp, mode_b, pnc);
1323                                 set_Cond_selector(node, proj);
1324                                 return;
1325                         }
1326                 }
1327
1328                 cmpH = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word);
1329
1330                 if (pnc == pn_Cmp_Eq) {
1331                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1332                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1333
1334                         assert(entry);
1335                         dst_blk = entry->value;
1336
1337                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Eq);
1338                         dbg = get_irn_dbg_info(node);
1339                         irn = new_rd_Cond(dbg, block, irn);
1340
1341                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1342                         mark_irn_visited(projHF);
1343                         exchange(projF, projHF);
1344
1345                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1346                         mark_irn_visited(projHT);
1347
1348                         new_bl = new_r_Block(irg, 1, &projHT);
1349
1350                         dbg   = get_irn_dbg_info(cmp);
1351                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1352                         irn = new_r_Proj(cmpL, mode_b, pn_Cmp_Eq);
1353                         dbg = get_irn_dbg_info(node);
1354                         irn = new_rd_Cond(dbg, new_bl, irn);
1355
1356                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1357                         mark_irn_visited(proj);
1358                         add_block_cf_input(dst_blk, projHF, proj);
1359
1360                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1361                         mark_irn_visited(proj);
1362                         exchange(projT, proj);
1363                 } else if (pnc == pn_Cmp_Lg) {
1364                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1365                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1366
1367                         assert(entry);
1368                         dst_blk = entry->value;
1369
1370                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Lg);
1371                         dbg = get_irn_dbg_info(node);
1372                         irn = new_rd_Cond(dbg, block, irn);
1373
1374                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1375                         mark_irn_visited(projHT);
1376                         exchange(projT, projHT);
1377
1378                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1379                         mark_irn_visited(projHF);
1380
1381                         new_bl = new_r_Block(irg, 1, &projHF);
1382
1383                         dbg   = get_irn_dbg_info(cmp);
1384                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1385                         irn = new_r_Proj(cmpL, mode_b, pn_Cmp_Lg);
1386                         dbg = get_irn_dbg_info(node);
1387                         irn = new_rd_Cond(dbg, new_bl, irn);
1388
1389                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1390                         mark_irn_visited(proj);
1391                         add_block_cf_input(dst_blk, projHT, proj);
1392
1393                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1394                         mark_irn_visited(proj);
1395                         exchange(projF, proj);
1396                 } else {
1397                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1398                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1399                         pmap_entry *entry;
1400
1401                         entry = pmap_find(env->proj_2_block, projT);
1402                         assert(entry);
1403                         dstT = entry->value;
1404
1405                         entry = pmap_find(env->proj_2_block, projF);
1406                         assert(entry);
1407                         dstF = entry->value;
1408
1409                         irn = new_r_Proj(cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1410                         dbg = get_irn_dbg_info(node);
1411                         irn = new_rd_Cond(dbg, block, irn);
1412
1413                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1414                         mark_irn_visited(projHT);
1415                         exchange(projT, projHT);
1416                         projT = projHT;
1417
1418                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1419                         mark_irn_visited(projHF);
1420
1421                         newbl_eq = new_r_Block(irg, 1, &projHF);
1422
1423                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Eq);
1424                         irn = new_rd_Cond(dbg, newbl_eq, irn);
1425
1426                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1427                         mark_irn_visited(proj);
1428                         exchange(projF, proj);
1429                         projF = proj;
1430
1431                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1432                         mark_irn_visited(proj);
1433
1434                         newbl_l = new_r_Block(irg, 1, &proj);
1435
1436                         dbg   = get_irn_dbg_info(cmp);
1437                         cmpL = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word);
1438                         irn = new_r_Proj(cmpL, mode_b, pnc);
1439                         dbg = get_irn_dbg_info(node);
1440                         irn = new_rd_Cond(dbg, newbl_l, irn);
1441
1442                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1443                         mark_irn_visited(proj);
1444                         add_block_cf_input(dstT, projT, proj);
1445
1446                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1447                         mark_irn_visited(proj);
1448                         add_block_cf_input(dstF, projF, proj);
1449                 }  /* if */
1450
1451                 /* we have changed the control flow */
1452                 env->flags |= CF_CHANGED;
1453         } else {
1454                 idx = get_irn_idx(sel);
1455
1456                 if (env->entries[idx]) {
1457                         /*
1458                            Bad, a jump-table with double-word index.
1459                            This should not happen, but if it does we handle
1460                            it like a Conv were between (in other words, ignore
1461                            the high part.
1462                          */
1463
1464                         if (! env->entries[idx]->low_word) {
1465                                 /* not ready yet, wait */
1466                                 pdeq_putr(env->waitq, node);
1467                                 return;
1468                         }  /* if */
1469                         set_Cond_selector(node, env->entries[idx]->low_word);
1470                 }  /* if */
1471         }  /* if */
1472 }  /* lower_Cond */
1473
1474 /**
1475  * Translate a Conv to higher_signed
1476  */
1477 static void lower_Conv_to_Ll(ir_node *node, lower_env_t *env)
1478 {
1479         ir_mode  *omode        = get_irn_mode(node);
1480         ir_node  *op           = get_Conv_op(node);
1481         ir_mode  *imode        = get_irn_mode(op);
1482         int      idx           = get_irn_idx(node);
1483         ir_graph *irg          = current_ir_graph;
1484         ir_node  *block        = get_nodes_block(node);
1485         dbg_info *dbg          = get_irn_dbg_info(node);
1486         node_entry_t *entry = env->entries[idx];
1487         ir_mode  *low_unsigned = env->params->low_unsigned;
1488         ir_mode  *low_signed
1489                 = mode_is_signed(omode) ? env->params->low_signed : low_unsigned;
1490
1491         assert(idx < env->n_entries);
1492
1493         if (mode_is_int(imode) || mode_is_reference(imode)) {
1494                 if (imode == env->params->high_signed
1495                                 || imode == env->params->high_unsigned) {
1496                         /* a Conv from Lu to Ls or Ls to Lu */
1497                         int           op_idx   = get_irn_idx(op);
1498                         node_entry_t *op_entry = env->entries[op_idx];
1499
1500                         if (! op_entry->low_word) {
1501                                 /* not ready yet, wait */
1502                                 pdeq_putr(env->waitq, node);
1503                                 return;
1504                         }
1505                         entry->low_word  = op_entry->low_word;
1506                         entry->high_word = new_rd_Conv(dbg, block, op_entry->high_word,
1507                                                        low_signed);
1508                 } else {
1509                         /* simple case: create a high word */
1510                         if (imode != low_unsigned)
1511                                 op = new_rd_Conv(dbg, block, op, low_unsigned);
1512
1513                         entry->low_word = op;
1514
1515                         if (mode_is_signed(imode)) {
1516                                 int      c       = get_mode_size_bits(low_signed) - 1;
1517                                 ir_node *cnst    = new_Const_long(low_unsigned, c);
1518                                 if (get_irn_mode(op) != low_signed)
1519                                         op = new_rd_Conv(dbg, block, op, low_signed);
1520                                 entry->high_word = new_rd_Shrs(dbg, block, op, cnst,
1521                                                                low_signed);
1522                         } else {
1523                                 entry->high_word = new_Const(get_mode_null(low_signed));
1524                         }
1525                 }
1526         } else if (imode == mode_b) {
1527                 entry->low_word = new_rd_Conv(dbg, block, op, low_unsigned);
1528                 entry->high_word = new_Const(get_mode_null(low_signed));
1529         } else {
1530                 ir_node *irn, *call;
1531                 ir_type *mtp = get_conv_type(imode, omode, env);
1532
1533                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1534                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1535                 set_irn_pinned(call, get_irn_pinned(node));
1536                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1537
1538                 entry->low_word  = new_r_Proj(irn, low_unsigned, 0);
1539                 entry->high_word = new_r_Proj(irn, low_signed, 1);
1540         }
1541 }
1542
1543 /**
1544  * Translate a Conv from higher_unsigned
1545  */
1546 static void lower_Conv_from_Ll(ir_node *node, lower_env_t *env)
1547 {
1548         ir_node      *op    = get_Conv_op(node);
1549         ir_mode      *omode = get_irn_mode(node);
1550         ir_node      *block = get_nodes_block(node);
1551         dbg_info     *dbg   = get_irn_dbg_info(node);
1552         int          idx    = get_irn_idx(op);
1553         ir_graph     *irg   = current_ir_graph;
1554         node_entry_t *entry = env->entries[idx];
1555
1556         assert(idx < env->n_entries);
1557
1558         if (! entry->low_word) {
1559                 /* not ready yet, wait */
1560                 pdeq_putr(env->waitq, node);
1561                 return;
1562         }
1563
1564         if (mode_is_int(omode) || mode_is_reference(omode)) {
1565                 op = entry->low_word;
1566
1567                 /* simple case: create a high word */
1568                 if (omode != env->params->low_unsigned)
1569                         op = new_rd_Conv(dbg, block, op, omode);
1570
1571                 set_Conv_op(node, op);
1572         } else if (omode == mode_b) {
1573                 /* llu ? true : false  <=> (low|high) ? true : false */
1574                 ir_mode *mode = env->params->low_unsigned;
1575                 ir_node *or   = new_rd_Or(dbg, block, entry->low_word, entry->high_word,
1576                                           mode);
1577                 set_Conv_op(node, or);
1578         } else {
1579                 ir_node *irn, *call, *in[2];
1580                 ir_mode *imode = get_irn_mode(op);
1581                 ir_type *mtp   = get_conv_type(imode, omode, env);
1582
1583                 irn   = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1584                 in[0] = entry->low_word;
1585                 in[1] = entry->high_word;
1586
1587                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1588                 set_irn_pinned(call, get_irn_pinned(node));
1589                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1590
1591                 exchange(node, new_r_Proj(irn, omode, 0));
1592         }
1593 }
1594
1595 /**
1596  * Translate a Conv.
1597  */
1598 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env)
1599 {
1600         mode = get_irn_mode(node);
1601
1602         if (mode == env->params->high_signed
1603                         || mode == env->params->high_unsigned) {
1604                 lower_Conv_to_Ll(node, env);
1605         } else {
1606                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1607
1608                 if (mode == env->params->high_signed
1609                                 || mode == env->params->high_unsigned) {
1610                         lower_Conv_from_Ll(node, env);
1611                 }
1612         }
1613 }
1614
1615 /**
1616  * Lower the method type.
1617  *
1618  * @param mtp  the method type to lower
1619  * @param ent  the lower environment
1620  *
1621  * @return the lowered type
1622  */
1623 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env)
1624 {
1625         pmap_entry *entry;
1626         ident      *lid;
1627         ir_type    *res, *value_type;
1628
1629         if (is_lowered_type(mtp))
1630                 return mtp;
1631
1632         entry = pmap_find(lowered_type, mtp);
1633         if (! entry) {
1634                 int i, n, r, n_param, n_res;
1635
1636                 /* count new number of params */
1637                 n_param = n = get_method_n_params(mtp);
1638                 for (i = n_param - 1; i >= 0; --i) {
1639                         ir_type *tp = get_method_param_type(mtp, i);
1640
1641                         if (is_Primitive_type(tp)) {
1642                                 ir_mode *mode = get_type_mode(tp);
1643
1644                                 if (mode == env->params->high_signed ||
1645                                         mode == env->params->high_unsigned)
1646                                         ++n_param;
1647                         }  /* if */
1648                 }  /* for */
1649
1650                 /* count new number of results */
1651                 n_res = r = get_method_n_ress(mtp);
1652                 for (i = n_res - 1; i >= 0; --i) {
1653                         ir_type *tp = get_method_res_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_res;
1661                         }  /* if */
1662                 }  /* for */
1663
1664                 res = new_type_method(n_param, n_res);
1665
1666                 /* set param types and result types */
1667                 for (i = n_param = 0; i < n; ++i) {
1668                         ir_type *tp = get_method_param_type(mtp, i);
1669
1670                         if (is_Primitive_type(tp)) {
1671                                 ir_mode *mode = get_type_mode(tp);
1672
1673                                 if (mode == env->params->high_signed) {
1674                                         set_method_param_type(res, n_param++, tp_u);
1675                                         set_method_param_type(res, n_param++, tp_s);
1676                                 } else if (mode == env->params->high_unsigned) {
1677                                         set_method_param_type(res, n_param++, tp_u);
1678                                         set_method_param_type(res, n_param++, tp_u);
1679                                 } else {
1680                                         set_method_param_type(res, n_param++, tp);
1681                                 }  /* if */
1682                         } else {
1683                                 set_method_param_type(res, n_param++, tp);
1684                         }  /* if */
1685                 }  /* for */
1686                 for (i = n_res = 0; i < r; ++i) {
1687                         ir_type *tp = get_method_res_type(mtp, i);
1688
1689                         if (is_Primitive_type(tp)) {
1690                                 ir_mode *mode = get_type_mode(tp);
1691
1692                                 if (mode == env->params->high_signed) {
1693                                         set_method_res_type(res, n_res++, tp_u);
1694                                         set_method_res_type(res, n_res++, tp_s);
1695                                 } else if (mode == env->params->high_unsigned) {
1696                                         set_method_res_type(res, n_res++, tp_u);
1697                                         set_method_res_type(res, n_res++, tp_u);
1698                                 } else {
1699                                         set_method_res_type(res, n_res++, tp);
1700                                 }  /* if */
1701                         } else {
1702                                 set_method_res_type(res, n_res++, tp);
1703                         }  /* if */
1704                 }  /* for */
1705                 set_lowered_type(mtp, res);
1706                 pmap_insert(lowered_type, mtp, res);
1707
1708                 value_type = get_method_value_param_type(mtp);
1709                 if (value_type != NULL) {
1710                         /* this creates a new value parameter type */
1711                         (void)get_method_value_param_ent(res, 0);
1712
1713                         /* set new param positions */
1714                         for (i = n_param = 0; i < n; ++i) {
1715                                 ir_type   *tp  = get_method_param_type(mtp, i);
1716                                 ident     *id  = get_method_param_ident(mtp, i);
1717                                 ir_entity *ent = get_method_value_param_ent(mtp, i);
1718
1719                                 set_entity_link(ent, INT_TO_PTR(n_param));
1720                                 if (is_Primitive_type(tp)) {
1721                                         ir_mode *mode = get_type_mode(tp);
1722
1723                                         if (mode == env->params->high_signed || mode == env->params->high_unsigned) {
1724                                                 if (id != NULL) {
1725                                                         lid = id_mangle(id, env->first_id);
1726                                                         set_method_param_ident(res, n_param, lid);
1727                                                         set_entity_ident(get_method_value_param_ent(res, n_param), lid);
1728                                                         lid = id_mangle(id, env->next_id);
1729                                                         set_method_param_ident(res, n_param + 1, lid);
1730                                                         set_entity_ident(get_method_value_param_ent(res, n_param + 1), lid);
1731                                                 }  /* if */
1732                                                 n_param += 2;
1733                                                 continue;
1734                                         }  /* if */
1735                                 }  /* if */
1736                                 if (id != NULL) {
1737                                         set_method_param_ident(res, n_param, id);
1738                                         set_entity_ident(get_method_value_param_ent(res, n_param), id);
1739                                 }  /* if */
1740                                 ++n_param;
1741                         }  /* for */
1742
1743                         set_lowered_type(value_type, get_method_value_param_type(res));
1744                 }  /* if */
1745         } else {
1746                 res = entry->value;
1747         }  /* if */
1748         return res;
1749 }  /* lower_mtp */
1750
1751 /**
1752  * Translate a Return.
1753  */
1754 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env)
1755 {
1756         ir_graph  *irg = current_ir_graph;
1757         ir_entity *ent = get_irg_entity(irg);
1758         ir_type   *mtp = get_entity_type(ent);
1759         ir_node   **in;
1760         int       i, j, n, idx;
1761         int       need_conv = 0;
1762         (void) mode;
1763
1764         /* check if this return must be lowered */
1765         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1766                 ir_node *pred = get_Return_res(node, i);
1767                 ir_mode *mode = get_irn_op_mode(pred);
1768
1769                 if (mode == env->params->high_signed ||
1770                         mode == env->params->high_unsigned) {
1771                         idx = get_irn_idx(pred);
1772                         if (! env->entries[idx]->low_word) {
1773                                 /* not ready yet, wait */
1774                                 pdeq_putr(env->waitq, node);
1775                                 return;
1776                         }  /* if */
1777                         need_conv = 1;
1778                 }  /* if */
1779         }  /* for */
1780         if (! need_conv)
1781                 return;
1782
1783         ent = get_irg_entity(irg);
1784         mtp = get_entity_type(ent);
1785
1786         mtp = lower_mtp(mtp, env);
1787         set_entity_type(ent, mtp);
1788
1789         /* create a new in array */
1790         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1791         in[0] = get_Return_mem(node);
1792
1793         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1794                 ir_node *pred = get_Return_res(node, i);
1795
1796                 idx = get_irn_idx(pred);
1797                 assert(idx < env->n_entries);
1798
1799                 if (env->entries[idx]) {
1800                         in[++j] = env->entries[idx]->low_word;
1801                         in[++j] = env->entries[idx]->high_word;
1802                 } else {
1803                         in[++j] = pred;
1804                 }  /* if */
1805         }  /* for */
1806
1807         set_irn_in(node, j+1, in);
1808 }  /* lower_Return */
1809
1810 /**
1811  * Translate the parameters.
1812  */
1813 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env)
1814 {
1815         ir_graph  *irg = get_irn_irg(node);
1816         ir_entity *ent = get_irg_entity(irg);
1817         ir_type   *tp  = get_entity_type(ent);
1818         ir_type   *mtp;
1819         long      *new_projs;
1820         int       i, j, n_params, rem;
1821         ir_node   *proj, *args;
1822         (void) mode;
1823
1824         if (is_lowered_type(tp)) {
1825                 mtp = get_associated_type(tp);
1826         } else {
1827                 mtp = tp;
1828         }  /* if */
1829         assert(! is_lowered_type(mtp));
1830
1831         n_params = get_method_n_params(mtp);
1832         if (n_params <= 0)
1833                 return;
1834
1835         NEW_ARR_A(long, new_projs, n_params);
1836
1837         /* first check if we have parameters that must be fixed */
1838         for (i = j = 0; i < n_params; ++i, ++j) {
1839                 ir_type *tp = get_method_param_type(mtp, i);
1840
1841                 new_projs[i] = j;
1842                 if (is_Primitive_type(tp)) {
1843                         ir_mode *mode = get_type_mode(tp);
1844
1845                         if (mode == env->params->high_signed ||
1846                                 mode == env->params->high_unsigned)
1847                                 ++j;
1848                 }  /* if */
1849         }  /* for */
1850         if (i == j)
1851                 return;
1852
1853         mtp = lower_mtp(mtp, env);
1854         set_entity_type(ent, mtp);
1855
1856         /* switch off optimization for new Proj nodes or they might be CSE'ed
1857            with not patched one's */
1858         rem = get_optimize();
1859         set_optimize(0);
1860
1861         /* ok, fix all Proj's and create new ones */
1862         args = get_irg_args(irg);
1863         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1864                 ir_node *pred = get_Proj_pred(proj);
1865                 long proj_nr;
1866                 int idx;
1867                 ir_mode *mode;
1868                 dbg_info *dbg;
1869
1870                 /* do not visit this node again */
1871                 mark_irn_visited(proj);
1872
1873                 if (pred != args)
1874                         continue;
1875
1876                 proj_nr = get_Proj_proj(proj);
1877                 set_Proj_proj(proj, new_projs[proj_nr]);
1878
1879                 idx = get_irn_idx(proj);
1880                 if (env->entries[idx]) {
1881                         ir_mode *low_mode = env->params->low_unsigned;
1882
1883                         mode = get_irn_mode(proj);
1884
1885                         if (mode == env->params->high_signed) {
1886                                 mode = env->params->low_signed;
1887                         } else {
1888                                 mode = env->params->low_unsigned;
1889                         }  /* if */
1890
1891                         dbg = get_irn_dbg_info(proj);
1892                         env->entries[idx]->low_word  =
1893                                 new_rd_Proj(dbg, args, low_mode, new_projs[proj_nr]);
1894                         env->entries[idx]->high_word =
1895                                 new_rd_Proj(dbg, args, mode, new_projs[proj_nr] + 1);
1896                 }  /* if */
1897         }  /* for */
1898         set_optimize(rem);
1899 }  /* lower_Start */
1900
1901 /**
1902  * Translate a Call.
1903  */
1904 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env)
1905 {
1906         ir_type  *tp = get_Call_type(node);
1907         ir_type  *call_tp;
1908         ir_node  **in, *proj, *results;
1909         int      n_params, n_res, need_lower = 0;
1910         int      i, j;
1911         long     *res_numbers = NULL;
1912         (void) mode;
1913
1914         if (is_lowered_type(tp)) {
1915                 call_tp = get_associated_type(tp);
1916         } else {
1917                 call_tp = tp;
1918         }  /* if */
1919
1920         assert(! is_lowered_type(call_tp));
1921
1922         n_params = get_method_n_params(call_tp);
1923         for (i = 0; i < n_params; ++i) {
1924                 ir_type *tp = get_method_param_type(call_tp, i);
1925
1926                 if (is_Primitive_type(tp)) {
1927                         ir_mode *mode = get_type_mode(tp);
1928
1929                         if (mode == env->params->high_signed ||
1930                                 mode == env->params->high_unsigned) {
1931                                 need_lower = 1;
1932                                 break;
1933                         }  /* if */
1934                 }  /* if */
1935         }  /* for */
1936         n_res = get_method_n_ress(call_tp);
1937         if (n_res > 0) {
1938                 NEW_ARR_A(long, res_numbers, n_res);
1939
1940                 for (i = j = 0; i < n_res; ++i, ++j) {
1941                         ir_type *tp = get_method_res_type(call_tp, i);
1942
1943                         res_numbers[i] = j;
1944                         if (is_Primitive_type(tp)) {
1945                                 ir_mode *mode = get_type_mode(tp);
1946
1947                                 if (mode == env->params->high_signed ||
1948                                         mode == env->params->high_unsigned) {
1949                                         need_lower = 1;
1950                                         ++j;
1951                                 }  /* if */
1952                         }  /* if */
1953                 }  /* for */
1954         }  /* if */
1955
1956         if (! need_lower)
1957                 return;
1958
1959         /* let's lower it */
1960         call_tp = lower_mtp(call_tp, env);
1961         set_Call_type(node, call_tp);
1962
1963         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1964
1965         in[0] = get_Call_mem(node);
1966         in[1] = get_Call_ptr(node);
1967
1968         for (j = 2, i = 0; i < n_params; ++i) {
1969                 ir_node *pred = get_Call_param(node, i);
1970                 int     idx = get_irn_idx(pred);
1971
1972                 if (env->entries[idx]) {
1973                         if (! env->entries[idx]->low_word) {
1974                                 /* not ready yet, wait */
1975                                 pdeq_putr(env->waitq, node);
1976                                 return;
1977                         }
1978                         in[j++] = env->entries[idx]->low_word;
1979                         in[j++] = env->entries[idx]->high_word;
1980                 } else {
1981                         in[j++] = pred;
1982                 }  /* if */
1983         }  /* for */
1984
1985         set_irn_in(node, j, in);
1986
1987         /* fix the results */
1988         results = NULL;
1989         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1990                 long proj_nr = get_Proj_proj(proj);
1991
1992                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
1993                         /* found the result proj */
1994                         results = proj;
1995                         break;
1996                 }  /* if */
1997         }  /* for */
1998
1999         if (results) {          /* there are results */
2000                 int rem = get_optimize();
2001
2002                 /* switch off optimization for new Proj nodes or they might be CSE'ed
2003                    with not patched one's */
2004                 set_optimize(0);
2005                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
2006                         if (get_Proj_pred(proj) == results) {
2007                                 long proj_nr = get_Proj_proj(proj);
2008                                 int idx;
2009
2010                                 /* found a result */
2011                                 set_Proj_proj(proj, res_numbers[proj_nr]);
2012                                 idx = get_irn_idx(proj);
2013                                 if (env->entries[idx]) {
2014                                         ir_mode *mode = get_irn_mode(proj);
2015                                         ir_mode *low_mode = env->params->low_unsigned;
2016                                         dbg_info *dbg;
2017
2018                                         if (mode == env->params->high_signed) {
2019                                                 mode = env->params->low_signed;
2020                                         } else {
2021                                                 mode = env->params->low_unsigned;
2022                                         }  /* if */
2023
2024                                         dbg = get_irn_dbg_info(proj);
2025                                         env->entries[idx]->low_word  =
2026                                                 new_rd_Proj(dbg, results, low_mode, res_numbers[proj_nr]);
2027                                         env->entries[idx]->high_word =
2028                                                 new_rd_Proj(dbg, results, mode, res_numbers[proj_nr] + 1);
2029                                 }  /* if */
2030                                 mark_irn_visited(proj);
2031                         }  /* if */
2032                 }  /* for */
2033                 set_optimize(rem);
2034         }
2035 }  /* lower_Call */
2036
2037 /**
2038  * Translate an Unknown into two.
2039  */
2040 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env)
2041 {
2042         int      idx = get_irn_idx(node);
2043         ir_graph *irg = get_irn_irg(node);
2044         ir_mode  *low_mode = env->params->low_unsigned;
2045
2046         env->entries[idx]->low_word  = new_r_Unknown(irg, low_mode);
2047         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2048 }  /* lower_Unknown */
2049
2050 /**
2051  * Translate a Phi.
2052  *
2053  * First step: just create two templates
2054  */
2055 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env)
2056 {
2057         ir_mode  *mode_l = env->params->low_unsigned;
2058         ir_graph *irg = get_irn_irg(phi);
2059         ir_node  *block, *unk_l, *unk_h, *phi_l, *phi_h;
2060         ir_node  **inl, **inh;
2061         dbg_info *dbg;
2062         int      idx, i, arity = get_Phi_n_preds(phi);
2063         int      enq = 0;
2064
2065         idx = get_irn_idx(phi);
2066         if (env->entries[idx]->low_word) {
2067                 /* Phi nodes already build, check for inputs */
2068                 ir_node *phil = env->entries[idx]->low_word;
2069                 ir_node *phih = env->entries[idx]->high_word;
2070
2071                 for (i = 0; i < arity; ++i) {
2072                         ir_node *pred = get_Phi_pred(phi, i);
2073                         int     idx = get_irn_idx(pred);
2074
2075                         if (env->entries[idx]->low_word) {
2076                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2077                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2078                         } else {
2079                                 /* still not ready */
2080                                 pdeq_putr(env->waitq, phi);
2081                                 return;
2082                         }  /* if */
2083                 }  /* for */
2084         }  /* if */
2085
2086         /* first create a new in array */
2087         NEW_ARR_A(ir_node *, inl, arity);
2088         NEW_ARR_A(ir_node *, inh, arity);
2089         unk_l = new_r_Unknown(irg, mode_l);
2090         unk_h = new_r_Unknown(irg, mode);
2091
2092         for (i = 0; i < arity; ++i) {
2093                 ir_node *pred = get_Phi_pred(phi, i);
2094                 int     idx = get_irn_idx(pred);
2095
2096                 if (env->entries[idx]->low_word) {
2097                         inl[i] = env->entries[idx]->low_word;
2098                         inh[i] = env->entries[idx]->high_word;
2099                 } else {
2100                         inl[i] = unk_l;
2101                         inh[i] = unk_h;
2102                         enq = 1;
2103                 }  /* if */
2104         }  /* for */
2105
2106         dbg   = get_irn_dbg_info(phi);
2107         block = get_nodes_block(phi);
2108
2109         idx = get_irn_idx(phi);
2110         assert(idx < env->n_entries);
2111         env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, block, arity, inl, mode_l);
2112         env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, block, arity, inh, mode);
2113
2114         /* Don't forget to link the new Phi nodes into the block.
2115          * Beware that some Phis might be optimized away. */
2116         if (is_Phi(phi_l))
2117                 add_Block_phi(block, phi_l);
2118         if (is_Phi(phi_h))
2119                 add_Block_phi(block, phi_h);
2120
2121         if (enq) {
2122                 /* not yet finished */
2123                 pdeq_putr(env->waitq, phi);
2124         }  /* if */
2125 }  /* lower_Phi */
2126
2127 /**
2128  * Translate a Mux.
2129  */
2130 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env)
2131 {
2132         ir_node  *block, *val;
2133         ir_node  *true_l, *true_h, *false_l, *false_h, *sel;
2134         dbg_info *dbg;
2135         int      idx;
2136
2137         val = get_Mux_true(mux);
2138         idx = get_irn_idx(val);
2139         if (env->entries[idx]->low_word) {
2140                 /* Values already build */
2141                 true_l = env->entries[idx]->low_word;
2142                 true_h = env->entries[idx]->high_word;
2143         } else {
2144                 /* still not ready */
2145                 pdeq_putr(env->waitq, mux);
2146                 return;
2147         }  /* if */
2148
2149         val = get_Mux_false(mux);
2150         idx = get_irn_idx(val);
2151         if (env->entries[idx]->low_word) {
2152                 /* Values already build */
2153                 false_l = env->entries[idx]->low_word;
2154                 false_h = env->entries[idx]->high_word;
2155         } else {
2156                 /* still not ready */
2157                 pdeq_putr(env->waitq, mux);
2158                 return;
2159         }  /* if */
2160
2161
2162         sel = get_Mux_sel(mux);
2163
2164         dbg   = get_irn_dbg_info(mux);
2165         block = get_nodes_block(mux);
2166
2167         idx = get_irn_idx(mux);
2168         assert(idx < env->n_entries);
2169         env->entries[idx]->low_word  = new_rd_Mux(dbg, block, sel, false_l, true_l, mode);
2170         env->entries[idx]->high_word = new_rd_Mux(dbg, block, sel, false_h, true_h, mode);
2171 }  /* lower_Mux */
2172
2173 /**
2174  * Translate an ASM node.
2175  */
2176 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env)
2177 {
2178         ir_mode *his = env->params->high_signed;
2179         ir_mode *hiu = env->params->high_unsigned;
2180         int      i;
2181         ir_node *n;
2182
2183         (void)mode;
2184
2185         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2186                 ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
2187                 if (op_mode == his || op_mode == hiu) {
2188                         panic("lowering ASM unimplemented");
2189                 }  /* if */
2190         }  /* for */
2191
2192         for (n = asmn;;) {
2193                 ir_mode *proj_mode;
2194
2195                 n = get_irn_link(n);
2196                 if (n == NULL)
2197                         break;
2198
2199                 proj_mode = get_irn_mode(n);
2200                 if (proj_mode == his || proj_mode == hiu) {
2201                         panic("lowering ASM unimplemented");
2202                 }  /* if */
2203         }  /* for */
2204 }  /* lower_ASM */
2205
2206 /**
2207  * Translate a Sel node.
2208  */
2209 static void lower_Sel(ir_node *sel, ir_mode *mode, lower_env_t *env)
2210 {
2211         (void) mode;
2212
2213         /* we must only lower value parameter Sels if we change the
2214            value parameter type. */
2215         if (env->value_param_tp != NULL) {
2216                 ir_entity *ent = get_Sel_entity(sel);
2217             if (get_entity_owner(ent) == env->value_param_tp) {
2218                         int pos = PTR_TO_INT(get_entity_link(ent));
2219
2220                         ent = get_method_value_param_ent(env->l_mtp, pos);
2221                         set_Sel_entity(sel, ent);
2222                 }  /* if */
2223         }  /* if */
2224 }  /* lower_Sel */
2225
2226 /**
2227  * check for opcodes that must always be lowered.
2228  */
2229 static int always_lower(ir_opcode code)
2230 {
2231         switch (code) {
2232         case iro_ASM:
2233         case iro_Proj:
2234         case iro_Start:
2235         case iro_Call:
2236         case iro_Return:
2237         case iro_Cond:
2238         case iro_Conv:
2239         case iro_Sel:
2240                 return 1;
2241         default:
2242                 return 0;
2243         }  /* switch */
2244 }  /* always_lower */
2245
2246 /**
2247  * lower boolean Proj(Cmp)
2248  */
2249 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env)
2250 {
2251         int      lidx, ridx;
2252         ir_node  *l, *r, *low, *high, *t, *res;
2253         pn_Cmp   pnc;
2254         ir_node  *blk;
2255         dbg_info *db;
2256
2257         l    = get_Cmp_left(cmp);
2258         lidx = get_irn_idx(l);
2259         if (! env->entries[lidx]->low_word) {
2260                 /* still not ready */
2261                 return NULL;
2262         }  /* if */
2263
2264         r    = get_Cmp_right(cmp);
2265         ridx = get_irn_idx(r);
2266         if (! env->entries[ridx]->low_word) {
2267                 /* still not ready */
2268                 return NULL;
2269         }  /* if */
2270
2271         pnc  = get_Proj_proj(proj);
2272         blk  = get_nodes_block(cmp);
2273         db   = get_irn_dbg_info(cmp);
2274         low  = new_rd_Cmp(db, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2275         high = new_rd_Cmp(db, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2276
2277         if (pnc == pn_Cmp_Eq) {
2278                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2279                 res = new_rd_And(db, blk,
2280                         new_r_Proj(low, mode_b, pnc),
2281                         new_r_Proj(high, mode_b, pnc),
2282                         mode_b);
2283         } else if (pnc == pn_Cmp_Lg) {
2284                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2285                 res = new_rd_Or(db, blk,
2286                         new_r_Proj(low, mode_b, pnc),
2287                         new_r_Proj(high, mode_b, pnc),
2288                         mode_b);
2289         } else {
2290                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2291                 t = new_rd_And(db, blk,
2292                         new_r_Proj(low, mode_b, pnc),
2293                         new_r_Proj(high, mode_b, pn_Cmp_Eq),
2294                         mode_b);
2295                 res = new_rd_Or(db, blk,
2296                         new_r_Proj(high, mode_b, pnc & ~pn_Cmp_Eq),
2297                         t,
2298                         mode_b);
2299         }  /* if */
2300         return res;
2301 }  /* lower_boolean_Proj_Cmp */
2302
2303 /**
2304  * The type of a lower function.
2305  *
2306  * @param node   the node to be lowered
2307  * @param mode   the low mode for the destination node
2308  * @param env    the lower environment
2309  */
2310 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2311
2312 /**
2313  * Lower a node.
2314  */
2315 static void lower_ops(ir_node *node, void *env)
2316 {
2317         lower_env_t  *lenv = env;
2318         node_entry_t *entry;
2319         int          idx = get_irn_idx(node);
2320         ir_mode      *mode = get_irn_mode(node);
2321
2322         if (mode == mode_b || is_Mux(node) || is_Conv(node)) {
2323                 int i;
2324
2325                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2326                         ir_node *proj = get_irn_n(node, i);
2327
2328                         if (is_Proj(proj)) {
2329                                 ir_node *cmp = get_Proj_pred(proj);
2330
2331                                 if (is_Cmp(cmp)) {
2332                                         ir_node *arg = get_Cmp_left(cmp);
2333
2334                                         mode = get_irn_mode(arg);
2335                                         if (mode == lenv->params->high_signed ||
2336                                                 mode == lenv->params->high_unsigned) {
2337                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2338
2339                                                 if (res == NULL) {
2340                                                         /* could not lower because predecessors not ready */
2341                                                         waitq_put(lenv->waitq, node);
2342                                                         return;
2343                                                 }  /* if */
2344                                                 set_irn_n(node, i, res);
2345                                         }  /* if */
2346                                 }  /* if */
2347                         }  /* if */
2348                 }  /* for */
2349         }  /* if */
2350
2351         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2352         if (entry || always_lower(get_irn_opcode(node))) {
2353                 ir_op      *op = get_irn_op(node);
2354                 lower_func func = (lower_func)op->ops.generic;
2355
2356                 if (func) {
2357                         mode = get_irn_op_mode(node);
2358
2359                         if (mode == lenv->params->high_signed)
2360                                 mode = lenv->params->low_signed;
2361                         else
2362                                 mode = lenv->params->low_unsigned;
2363
2364                         DB((dbg, LEVEL_1, "  %+F\n", node));
2365                         func(node, mode, lenv);
2366                 }  /* if */
2367         }  /* if */
2368 }  /* lower_ops */
2369
2370 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2371
2372 /**
2373  * Compare two op_mode_entry_t's.
2374  */
2375 static int cmp_op_mode(const void *elt, const void *key, size_t size)
2376 {
2377         const op_mode_entry_t *e1 = elt;
2378         const op_mode_entry_t *e2 = key;
2379         (void) size;
2380
2381         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2382 }  /* cmp_op_mode */
2383
2384 /**
2385  * Compare two conv_tp_entry_t's.
2386  */
2387 static int cmp_conv_tp(const void *elt, const void *key, size_t size)
2388 {
2389         const conv_tp_entry_t *e1 = elt;
2390         const conv_tp_entry_t *e2 = key;
2391         (void) size;
2392
2393         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2394 }  /* cmp_conv_tp */
2395
2396 /**
2397  * Enter a lowering function into an ir_op.
2398  */
2399 static void enter_lower_func(ir_op *op, lower_func func)
2400 {
2401         op->ops.generic = (op_func)func;
2402 }  /* enter_lower_func */
2403
2404 /**
2405  * Returns non-zero if a method type must be lowered.
2406  *
2407  * @param mtp  the method type
2408  */
2409 static int mtp_must_to_lowered(ir_type *mtp, lower_env_t *env)
2410 {
2411         int i, n_params;
2412
2413         n_params = get_method_n_params(mtp);
2414         if (n_params <= 0)
2415                 return 0;
2416
2417         /* first check if we have parameters that must be fixed */
2418         for (i = 0; i < n_params; ++i) {
2419                 ir_type *tp = get_method_param_type(mtp, i);
2420
2421                 if (is_Primitive_type(tp)) {
2422                         ir_mode *mode = get_type_mode(tp);
2423
2424                         if (mode == env->params->high_signed ||
2425                                 mode == env->params->high_unsigned)
2426                                 return 1;
2427                 }  /* if */
2428         }  /* for */
2429         return 0;
2430 }  /* mtp_must_to_lowered */
2431
2432 /*
2433  * Do the lowering.
2434  */
2435 void lower_dw_ops(const lwrdw_param_t *param)
2436 {
2437         lower_env_t lenv;
2438         int         i;
2439         ir_graph    *rem;
2440
2441         if (! param)
2442                 return;
2443
2444         if (! param->enable)
2445                 return;
2446
2447         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2448
2449         assert(2 * get_mode_size_bits(param->low_signed)   == get_mode_size_bits(param->high_signed));
2450         assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
2451         assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
2452
2453         /* create the necessary maps */
2454         if (! prim_types)
2455                 prim_types = pmap_create();
2456         if (! intrinsic_fkt)
2457                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2458         if (! conv_types)
2459                 conv_types = new_set(cmp_conv_tp, 16);
2460         if (! lowered_type)
2461                 lowered_type = pmap_create();
2462
2463         /* create a primitive unsigned and signed type */
2464         if (! tp_u)
2465                 tp_u = get_primitive_type(param->low_unsigned);
2466         if (! tp_s)
2467                 tp_s = get_primitive_type(param->low_signed);
2468
2469         /* create method types for the created binop calls */
2470         if (! binop_tp_u) {
2471                 binop_tp_u = new_type_method(4, 2);
2472                 set_method_param_type(binop_tp_u, 0, tp_u);
2473                 set_method_param_type(binop_tp_u, 1, tp_u);
2474                 set_method_param_type(binop_tp_u, 2, tp_u);
2475                 set_method_param_type(binop_tp_u, 3, tp_u);
2476                 set_method_res_type(binop_tp_u, 0, tp_u);
2477                 set_method_res_type(binop_tp_u, 1, tp_u);
2478         }  /* if */
2479         if (! binop_tp_s) {
2480                 binop_tp_s = new_type_method(4, 2);
2481                 set_method_param_type(binop_tp_s, 0, tp_u);
2482                 set_method_param_type(binop_tp_s, 1, tp_s);
2483                 set_method_param_type(binop_tp_s, 2, tp_u);
2484                 set_method_param_type(binop_tp_s, 3, tp_s);
2485                 set_method_res_type(binop_tp_s, 0, tp_u);
2486                 set_method_res_type(binop_tp_s, 1, tp_s);
2487         }  /* if */
2488         if (! shiftop_tp_u) {
2489                 shiftop_tp_u = new_type_method(3, 2);
2490                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2491                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2492                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2493                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2494                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2495         }  /* if */
2496         if (! shiftop_tp_s) {
2497                 shiftop_tp_s = new_type_method(3, 2);
2498                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2499                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2500                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2501                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2502                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2503         }  /* if */
2504         if (! unop_tp_u) {
2505                 unop_tp_u = new_type_method(2, 2);
2506                 set_method_param_type(unop_tp_u, 0, tp_u);
2507                 set_method_param_type(unop_tp_u, 1, tp_u);
2508                 set_method_res_type(unop_tp_u, 0, tp_u);
2509                 set_method_res_type(unop_tp_u, 1, tp_u);
2510         }  /* if */
2511         if (! unop_tp_s) {
2512                 unop_tp_s = new_type_method(2, 2);
2513                 set_method_param_type(unop_tp_s, 0, tp_u);
2514                 set_method_param_type(unop_tp_s, 1, tp_s);
2515                 set_method_res_type(unop_tp_s, 0, tp_u);
2516                 set_method_res_type(unop_tp_s, 1, tp_s);
2517         }  /* if */
2518
2519         lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), param->low_unsigned);
2520         lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), param->low_unsigned);
2521         lenv.waitq         = new_pdeq();
2522         lenv.params        = param;
2523         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
2524         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
2525
2526         /* first clear the generic function pointer for all ops */
2527         clear_irp_opcodes_generic_func();
2528
2529 #define LOWER2(op, fkt)   enter_lower_func(op_##op, fkt)
2530 #define LOWER(op)         LOWER2(op, lower_##op)
2531 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2532 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2533
2534         /* the table of all operations that must be lowered follows */
2535         LOWER(ASM);
2536         LOWER(Load);
2537         LOWER(Store);
2538         LOWER(Const);
2539         LOWER(And);
2540         LOWER(Or);
2541         LOWER(Eor);
2542         LOWER(Not);
2543         LOWER(Cond);
2544         LOWER(Return);
2545         LOWER(Call);
2546         LOWER(Unknown);
2547         LOWER(Phi);
2548         LOWER(Mux);
2549         LOWER(Start);
2550
2551         LOWER_BIN(Add);
2552         LOWER_BIN(Sub);
2553         LOWER_BIN(Mul);
2554         LOWER(Shl);
2555         LOWER(Shr);
2556         LOWER(Shrs);
2557         LOWER(Rotl);
2558         LOWER(DivMod);
2559         LOWER(Div);
2560         LOWER(Mod);
2561         LOWER(Sel);
2562         LOWER_UN(Abs);
2563         LOWER_UN(Minus);
2564
2565         LOWER(Conv);
2566
2567 #undef LOWER_UN
2568 #undef LOWER_BIN
2569 #undef LOWER
2570 #undef LOWER2
2571
2572         /* transform all graphs */
2573         rem = current_ir_graph;
2574         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2575                 ir_graph  *irg = get_irp_irg(i);
2576                 ir_entity *ent;
2577                 ir_type   *mtp;
2578                 int n_idx;
2579
2580                 obstack_init(&lenv.obst);
2581
2582                 n_idx = get_irg_last_idx(irg);
2583                 n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2584                 lenv.n_entries = n_idx;
2585                 lenv.entries   = NEW_ARR_F(node_entry_t *, n_idx);
2586                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2587
2588                 lenv.l_mtp        = NULL;
2589                 lenv.flags        = 0;
2590                 lenv.proj_2_block = pmap_create();
2591                 lenv.value_param_tp = NULL;
2592                 ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2593
2594                 ent = get_irg_entity(irg);
2595                 mtp = get_entity_type(ent);
2596
2597                 if (mtp_must_to_lowered(mtp, &lenv)) {
2598                         ir_type *ltp = lower_mtp(mtp, &lenv);
2599                         lenv.flags |= MUST_BE_LOWERED;
2600                         set_entity_type(ent, ltp);
2601                         lenv.l_mtp = ltp;
2602                         lenv.value_param_tp = get_method_value_param_type(mtp);
2603                 }  /* if */
2604
2605                 /* first step: link all nodes and allocate data */
2606                 irg_walk_graph(irg, firm_clear_node_and_phi_links, prepare_links_and_handle_rotl, &lenv);
2607
2608                 if (lenv.flags & MUST_BE_LOWERED) {
2609                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2610
2611                         /* must do some work */
2612                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2613
2614                         /* last step: all waiting nodes */
2615                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2616                         current_ir_graph = irg;
2617                         while (! pdeq_empty(lenv.waitq)) {
2618                                 ir_node *node = pdeq_getl(lenv.waitq);
2619
2620                                 lower_ops(node, &lenv);
2621                         }  /* while */
2622
2623                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2624
2625                         /* outs are invalid, we changed the graph */
2626                         set_irg_outs_inconsistent(irg);
2627
2628                         if (lenv.flags & CF_CHANGED) {
2629                                 /* control flow changed, dominance info is invalid */
2630                                 set_irg_doms_inconsistent(irg);
2631                                 set_irg_extblk_inconsistent(irg);
2632                                 set_irg_loopinfo_inconsistent(irg);
2633                         }  /* if */
2634                 } else {
2635                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2636                 }  /* if */
2637                 pmap_destroy(lenv.proj_2_block);
2638                 DEL_ARR_F(lenv.entries);
2639                 obstack_free(&lenv.obst, NULL);
2640         }  /* for */
2641         del_pdeq(lenv.waitq);
2642         current_ir_graph = rem;
2643 }  /* lower_dw_ops */
2644
2645 struct pass_t {
2646         ir_prog_pass_t      pass;
2647         const lwrdw_param_t *param;
2648 };
2649
2650 /**
2651  * Creates a wrapper around lower_dw_ops().
2652  */
2653 static int pass_wrapper(ir_prog *irp, void *context)
2654 {
2655         struct pass_t *pass = context;
2656
2657         (void)irp;
2658         lower_dw_ops(pass->param);
2659         return 0;
2660 }
2661
2662 ir_prog_pass_t *lower_dw_ops_pass(const char *name, const lwrdw_param_t *param)
2663 {
2664         struct pass_t *pass = XMALLOCZ(struct pass_t);
2665
2666         pass->param = param;
2667         return def_prog_pass_constructor(
2668                 &pass->pass, name ? name : "lower_dw", pass_wrapper);
2669 }  /* lower_dw_ops_pass */
2670
2671 /* Default implementation. */
2672 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2673                                     const ir_mode *imode, const ir_mode *omode,
2674                                     void *context)
2675 {
2676         char buf[64];
2677         ident *id;
2678         ir_entity *ent;
2679         (void) context;
2680
2681         if (imode == omode) {
2682                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2683         } else {
2684                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2685                         get_mode_name(imode), get_mode_name(omode));
2686         }  /* if */
2687         id = new_id_from_str(buf);
2688
2689         ent = new_entity(get_glob_type(), id, method);
2690         set_entity_ld_ident(ent, get_entity_ident(ent));
2691         return ent;
2692 }  /* def_create_intrinsic_fkt */