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 (op, imode, omode) to Intrinsic functions entities. */
  58 static set *intrinsic_fkt;
  59
  60 /** A map from (imode, omode) to conv function types. */
  61 static set *conv_types;
  62
  63 /** A map from a method type to its lowered type. */
  64 static pmap *lowered_type;
  65
  66 /** The types for the binop and unop intrinsics. */
  67 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;
  68
  69 /** the debug handle */
  70 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  71
  72 /**
  73  * An entry in the (op, imode, omode) -> entity map.
  74  */
  75 typedef struct _op_mode_entry {
  76         const ir_op   *op;    /**< the op */
  77         const ir_mode *imode; /**< the input mode */
  78         const ir_mode *omode; /**< the output mode */
  79         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  80 } op_mode_entry_t;
  81
  82 /**
  83  * An entry in the (imode, omode) -> tp map.
  84  */
  85 typedef struct _conv_tp_entry {
  86         const ir_mode *imode; /**< the input mode */
  87         const ir_mode *omode; /**< the output mode */
  88         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
  89 } conv_tp_entry_t;
  90
  91 /**
  92  * Every double word node will be replaced,
  93  * we need some store to hold the replacement:
  94  */
  95 typedef struct _node_entry_t {
  96         ir_node *low_word;    /**< the low word */
  97         ir_node *high_word;   /**< the high word */
  98 } node_entry_t;
  99
 100 enum lower_flags {
 101         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 102         CF_CHANGED      = 2,  /**< control flow was changed */
 103 };
 104
 105 /**
 106  * The lower environment.
 107  */
 108 typedef struct _lower_env_t {
 109         node_entry_t **entries;       /**< entries per node */
 110         struct obstack obst;          /**< an obstack holding the temporary data */
 111         ir_type  *l_mtp;              /**< lowered method type of the current method */
 112         tarval   *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 113         tarval   *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 114         pdeq     *waitq;              /**< a wait queue of all nodes that must be handled later */
 115         pmap     *proj_2_block;       /**< a map from ProjX to its destination blocks */
 116         ident    *first_id;           /**< .l for little and .h for big endian */
 117         ident    *next_id;            /**< .h for little and .l for big endian */
 118         const lwrdw_param_t *params;  /**< transformation parameter */
 119         unsigned flags;               /**< some flags */
 120         int      n_entries;           /**< number of entries */
 121         ir_type  *value_param_tp;     /**< the old value param type */
 122 } lower_env_t;
 123
 124 /**
 125  * Create a method type for a Conv emulation from imode to omode.
 126  */
 127 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env)
 128 {
 129         conv_tp_entry_t key, *entry;
 130         ir_type *mtd;
 131
 132         key.imode = imode;
 133         key.omode = omode;
 134         key.mtd   = NULL;
 135
 136         entry = set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 137         if (! entry->mtd) {
 138                 int n_param = 1, n_res = 1;
 139
 140                 if (imode == env->params->high_signed || imode == env->params->high_unsigned)
 141                         n_param = 2;
 142                 if (omode == env->params->high_signed || omode == env->params->high_unsigned)
 143                         n_res = 2;
 144
 145                 /* create a new one */
 146                 mtd = new_type_method(n_param, n_res);
 147
 148                 /* set param types and result types */
 149                 n_param = 0;
 150                 if (imode == env->params->high_signed) {
 151                         set_method_param_type(mtd, n_param++, tp_u);
 152                         set_method_param_type(mtd, n_param++, tp_s);
 153                 } else if (imode == env->params->high_unsigned) {
 154                         set_method_param_type(mtd, n_param++, tp_u);
 155                         set_method_param_type(mtd, n_param++, tp_u);
 156                 } else {
 157                         ir_type *tp = get_type_for_mode(imode);
 158                         set_method_param_type(mtd, n_param++, tp);
 159                 }  /* if */
 160
 161                 n_res = 0;
 162                 if (omode == env->params->high_signed) {
 163                         set_method_res_type(mtd, n_res++, tp_u);
 164                         set_method_res_type(mtd, n_res++, tp_s);
 165                 } else if (omode == env->params->high_unsigned) {
 166                         set_method_res_type(mtd, n_res++, tp_u);
 167                         set_method_res_type(mtd, n_res++, tp_u);
 168                 } else {
 169                         ir_type *tp = get_type_for_mode(omode);
 170                         set_method_res_type(mtd, n_res++, tp);
 171                 }  /* if */
 172                 entry->mtd = mtd;
 173         } else {
 174                 mtd = entry->mtd;
 175         }  /* if */
 176         return mtd;
 177 }  /* get_conv_type */
 178
 179 /**
 180  * Add an additional control flow input to a block.
 181  * Patch all Phi nodes. The new Phi inputs are copied from
 182  * old input number nr.
 183  */
 184 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 185 {
 186         int i, arity = get_irn_arity(block);
 187         ir_node **in, *phi;
 188
 189         assert(nr < arity);
 190
 191         NEW_ARR_A(ir_node *, in, arity + 1);
 192         for (i = 0; i < arity; ++i)
 193                 in[i] = get_irn_n(block, i);
 194         in[i] = cf;
 195
 196         set_irn_in(block, i + 1, in);
 197
 198         for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
 199                 for (i = 0; i < arity; ++i)
 200                         in[i] = get_irn_n(phi, i);
 201                 in[i] = in[nr];
 202                 set_irn_in(phi, i + 1, in);
 203         }  /* for */
 204 }  /* add_block_cf_input_nr */
 205
 206 /**
 207  * Add an additional control flow input to a block.
 208  * Patch all Phi nodes. The new Phi inputs are copied from
 209  * old input from cf tmpl.
 210  */
 211 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 212 {
 213         int i, arity = get_irn_arity(block);
 214         int nr = 0;
 215
 216         for (i = 0; i < arity; ++i) {
 217                 if (get_irn_n(block, i) == tmpl) {
 218                         nr = i;
 219                         break;
 220                 }  /* if */
 221         }  /* for */
 222         assert(i < arity);
 223         add_block_cf_input_nr(block, nr, cf);
 224 }  /* add_block_cf_input */
 225
 226 /**
 227  * Return the "operational" mode of a Firm node.
 228  */
 229 static ir_mode *get_irn_op_mode(ir_node *node)
 230 {
 231         switch (get_irn_opcode(node)) {
 232         case iro_Load:
 233                 return get_Load_mode(node);
 234         case iro_Store:
 235                 return get_irn_mode(get_Store_value(node));
 236         case iro_DivMod:
 237                 return get_irn_mode(get_DivMod_left(node));
 238         case iro_Div:
 239                 return get_irn_mode(get_Div_left(node));
 240         case iro_Mod:
 241                 return get_irn_mode(get_Mod_left(node));
 242         case iro_Cmp:
 243                 return get_irn_mode(get_Cmp_left(node));
 244         default:
 245                 return get_irn_mode(node);
 246         }  /* switch */
 247 }  /* get_irn_op_mode */
 248
 249 /**
 250  * Walker, prepare the node links.
 251  */
 252 static void prepare_links(ir_node *node, void *env)
 253 {
 254         lower_env_t  *lenv = env;
 255         ir_mode      *mode = get_irn_op_mode(node);
 256         node_entry_t *link;
 257         int          i, idx;
 258
 259         if (mode == lenv->params->high_signed ||
 260                 mode == lenv->params->high_unsigned) {
 261                 /* ok, found a node that will be lowered */
 262                 link = OALLOCZ(&lenv->obst, node_entry_t);
 263
 264                 idx = get_irn_idx(node);
 265                 if (idx >= lenv->n_entries) {
 266                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 267                         int old = lenv->n_entries;
 268                         int n_idx = idx + (idx >> 3);
 269
 270                         ARR_RESIZE(node_entry_t *, lenv->entries, n_idx);
 271                         memset(&lenv->entries[old], 0, (n_idx - old) * sizeof(lenv->entries[0]));
 272                         lenv->n_entries = n_idx;
 273                 }
 274                 lenv->entries[idx] = link;
 275                 lenv->flags |= MUST_BE_LOWERED;
 276         } else if (is_Conv(node)) {
 277                 /* Conv nodes have two modes */
 278                 ir_node *pred = get_Conv_op(node);
 279                 mode = get_irn_mode(pred);
 280
 281                 if (mode == lenv->params->high_signed ||
 282                         mode == lenv->params->high_unsigned) {
 283                         /* must lower this node either but don't need a link */
 284                         lenv->flags |= MUST_BE_LOWERED;
 285                 }  /* if */
 286                 return;
 287         }  /* if */
 288
 289         if (is_Proj(node)) {
 290                 /* link all Proj nodes to its predecessor:
 291                    Note that Tuple Proj's and its Projs are linked either. */
 292                 ir_node *pred = get_Proj_pred(node);
 293
 294                 set_irn_link(node, get_irn_link(pred));
 295                 set_irn_link(pred, node);
 296         } else if (is_Phi(node)) {
 297                 /* link all Phi nodes to its block */
 298                 ir_node *block = get_nodes_block(node);
 299                 add_Block_phi(block, node);
 300         } else if (is_Block(node)) {
 301                 /* fill the Proj -> Block map */
 302                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 303                         ir_node *pred = get_Block_cfgpred(node, i);
 304
 305                         if (is_Proj(pred))
 306                                 pmap_insert(lenv->proj_2_block, pred, node);
 307                 }  /* for */
 308         }  /* if */
 309 }  /* prepare_links */
 310
 311 /**
 312  * Translate a Constant: create two.
 313  */
 314 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env)
 315 {
 316         tarval   *tv, *tv_l, *tv_h;
 317         ir_node  *low, *high;
 318         dbg_info *dbg = get_irn_dbg_info(node);
 319         int      idx;
 320         ir_graph *irg = current_ir_graph;
 321         ir_mode  *low_mode = env->params->low_unsigned;
 322
 323         tv   = get_Const_tarval(node);
 324
 325         tv_l = tarval_convert_to(tv, low_mode);
 326         low  = new_rd_Const(dbg, irg, tv_l);
 327
 328         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 329         high = new_rd_Const(dbg, irg, tv_h);
 330
 331         idx = get_irn_idx(node);
 332         assert(idx < env->n_entries);
 333         env->entries[idx]->low_word  = low;
 334         env->entries[idx]->high_word = high;
 335 }  /* lower_Const */
 336
 337 /**
 338  * Translate a Load: create two.
 339  */
 340 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env)
 341 {
 342         ir_mode    *low_mode = env->params->low_unsigned;
 343         ir_graph   *irg = current_ir_graph;
 344         ir_node    *adr = get_Load_ptr(node);
 345         ir_node    *mem = get_Load_mem(node);
 346         ir_node    *low, *high, *proj;
 347         dbg_info   *dbg;
 348         ir_node    *block = get_nodes_block(node);
 349         int         idx;
 350         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 351                                  ? cons_volatile : 0;
 352
 353         if (env->params->little_endian) {
 354                 low  = adr;
 355                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 356         } else {
 357                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 358                 high = adr;
 359         }  /* if */
 360
 361         /* create two loads */
 362         dbg  = get_irn_dbg_info(node);
 363         low  = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 364         proj = new_r_Proj(low, mode_M, pn_Load_M);
 365         high = new_rd_Load(dbg, block, proj, high, mode, volatility);
 366
 367         idx = get_irn_idx(node);
 368         assert(idx < env->n_entries);
 369         env->entries[idx]->low_word  = low;
 370         env->entries[idx]->high_word = high;
 371
 372         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 373                 idx = get_irn_idx(proj);
 374
 375                 switch (get_Proj_proj(proj)) {
 376                 case pn_Load_M:         /* Memory result. */
 377                         /* put it to the second one */
 378                         set_Proj_pred(proj, high);
 379                         break;
 380                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 381                         /* put it to the first one */
 382                         set_Proj_pred(proj, low);
 383                         break;
 384                 case pn_Load_res:       /* Result of load operation. */
 385                         assert(idx < env->n_entries);
 386                         env->entries[idx]->low_word  = new_r_Proj(low,  low_mode, pn_Load_res);
 387                         env->entries[idx]->high_word = new_r_Proj(high, mode,     pn_Load_res);
 388                         break;
 389                 default:
 390                         assert(0 && "unexpected Proj number");
 391                 }  /* switch */
 392                 /* mark this proj: we have handled it already, otherwise we might fall into
 393                  * out new nodes. */
 394                 mark_irn_visited(proj);
 395         }  /* for */
 396 }  /* lower_Load */
 397
 398 /**
 399  * Translate a Store: create two.
 400  */
 401 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env)
 402 {
 403         ir_graph     *irg;
 404         ir_node      *block, *adr, *mem;
 405         ir_node      *low, *high, *irn, *proj;
 406         dbg_info     *dbg;
 407         int           idx;
 408         node_entry_t *entry;
 409         ir_cons_flags    volatility = get_Store_volatility(node) == volatility_is_volatile
 410                                    ? cons_volatile : 0;
 411         (void) mode;
 412
 413         irn = get_Store_value(node);
 414         entry = env->entries[get_irn_idx(irn)];
 415         assert(entry);
 416
 417         if (! entry->low_word) {
 418                 /* not ready yet, wait */
 419                 pdeq_putr(env->waitq, node);
 420                 return;
 421         }  /* if */
 422
 423         irg = current_ir_graph;
 424         adr = get_Store_ptr(node);
 425         mem = get_Store_mem(node);
 426         block = get_nodes_block(node);
 427
 428         if (env->params->little_endian) {
 429                 low  = adr;
 430                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 431         } else {
 432                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 433                 high = adr;
 434         }  /* if */
 435
 436         /* create two Stores */
 437         dbg = get_irn_dbg_info(node);
 438         low  = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 439         proj = new_r_Proj(low, mode_M, pn_Store_M);
 440         high = new_rd_Store(dbg, block, proj, high, entry->high_word, volatility);
 441
 442         idx = get_irn_idx(node);
 443         assert(idx < env->n_entries);
 444         env->entries[idx]->low_word  = low;
 445         env->entries[idx]->high_word = high;
 446
 447         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 448                 idx = get_irn_idx(proj);
 449
 450                 switch (get_Proj_proj(proj)) {
 451                 case pn_Store_M:         /* Memory result. */
 452                         /* put it to the second one */
 453                         set_Proj_pred(proj, high);
 454                         break;
 455                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 456                         /* put it to the first one */
 457                         set_Proj_pred(proj, low);
 458                         break;
 459                 default:
 460                         assert(0 && "unexpected Proj number");
 461                 }  /* switch */
 462                 /* mark this proj: we have handled it already, otherwise we might fall into
 463                  * out new nodes. */
 464                 mark_irn_visited(proj);
 465         }  /* for */
 466 }  /* lower_Store */
 467
 468 /**
 469  * Return a node containing the address of the intrinsic emulation function.
 470  *
 471  * @param method  the method type of the emulation function
 472  * @param op      the emulated ir_op
 473  * @param imode   the input mode of the emulated opcode
 474  * @param omode   the output mode of the emulated opcode
 475  * @param env     the lower environment
 476  */
 477 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 478                                       ir_mode *imode, ir_mode *omode,
 479                                       lower_env_t *env)
 480 {
 481         symconst_symbol sym;
 482         ir_entity *ent;
 483         op_mode_entry_t key, *entry;
 484
 485         key.op    = op;
 486         key.imode = imode;
 487         key.omode = omode;
 488         key.ent   = NULL;
 489
 490         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 491                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 492         if (! entry->ent) {
 493                 /* create a new one */
 494                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 495
 496                 assert(ent && "Intrinsic creator must return an entity");
 497                 entry->ent = ent;
 498         } else {
 499                 ent = entry->ent;
 500         }  /* if */
 501         sym.entity_p = ent;
 502         return new_r_SymConst(current_ir_graph, mode_P_code, sym, symconst_addr_ent);
 503 }  /* get_intrinsic_address */
 504
 505 /**
 506  * Translate a Div.
 507  *
 508  * Create an intrinsic Call.
 509  */
 510 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env)
 511 {
 512         ir_node  *block, *irn, *call, *proj;
 513         ir_node  *in[4];
 514         ir_mode  *opmode;
 515         dbg_info *dbg;
 516         ir_type  *mtp;
 517         int      idx;
 518         node_entry_t *entry;
 519
 520         irn   = get_Div_left(node);
 521         entry = env->entries[get_irn_idx(irn)];
 522         assert(entry);
 523
 524         if (! entry->low_word) {
 525                 /* not ready yet, wait */
 526                 pdeq_putr(env->waitq, node);
 527                 return;
 528         }  /* if */
 529
 530         in[0] = entry->low_word;
 531         in[1] = entry->high_word;
 532
 533         irn   = get_Div_right(node);
 534         entry = env->entries[get_irn_idx(irn)];
 535         assert(entry);
 536
 537         if (! entry->low_word) {
 538                 /* not ready yet, wait */
 539                 pdeq_putr(env->waitq, node);
 540                 return;
 541         }  /* if */
 542
 543         in[2] = entry->low_word;
 544         in[3] = entry->high_word;
 545
 546         dbg   = get_irn_dbg_info(node);
 547         block = get_nodes_block(node);
 548
 549         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 550         opmode = get_irn_op_mode(node);
 551         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 552         call = new_rd_Call(dbg, block, get_Div_mem(node), irn, 4, in, mtp);
 553         set_irn_pinned(call, get_irn_pinned(node));
 554         irn = new_r_Proj(call, mode_T, pn_Call_T_result);
 555
 556         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 557                 switch (get_Proj_proj(proj)) {
 558                 case pn_Div_M:         /* Memory result. */
 559                         /* reroute to the call */
 560                         set_Proj_pred(proj, call);
 561                         set_Proj_proj(proj, pn_Call_M);
 562                         break;
 563                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 564                         /* reroute to the call */
 565                         set_Proj_pred(proj, call);
 566                         set_Proj_proj(proj, pn_Call_X_except);
 567                         break;
 568                 case pn_Div_res:       /* Result of computation. */
 569                         idx = get_irn_idx(proj);
 570                         assert(idx < env->n_entries);
 571                         env->entries[idx]->low_word  = new_r_Proj(irn, env->params->low_unsigned, 0);
 572                         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 573                         break;
 574                 default:
 575                         assert(0 && "unexpected Proj number");
 576                 }  /* switch */
 577                 /* mark this proj: we have handled it already, otherwise we might fall into
 578                  * out new nodes. */
 579                 mark_irn_visited(proj);
 580         }  /* for */
 581 }  /* lower_Div */
 582
 583 /**
 584  * Translate a Mod.
 585  *
 586  * Create an intrinsic Call.
 587  */
 588 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env)
 589 {
 590         ir_node  *block, *proj, *irn, *call;
 591         ir_node  *in[4];
 592         ir_mode  *opmode;
 593         dbg_info *dbg;
 594         ir_type  *mtp;
 595         int      idx;
 596         node_entry_t *entry;
 597
 598         irn   = get_Mod_left(node);
 599         entry = env->entries[get_irn_idx(irn)];
 600         assert(entry);
 601
 602         if (! entry->low_word) {
 603                 /* not ready yet, wait */
 604                 pdeq_putr(env->waitq, node);
 605                 return;
 606         }  /* if */
 607
 608         in[0] = entry->low_word;
 609         in[1] = entry->high_word;
 610
 611         irn   = get_Mod_right(node);
 612         entry = env->entries[get_irn_idx(irn)];
 613         assert(entry);
 614
 615         if (! entry->low_word) {
 616                 /* not ready yet, wait */
 617                 pdeq_putr(env->waitq, node);
 618                 return;
 619         }  /* if */
 620
 621         in[2] = entry->low_word;
 622         in[3] = entry->high_word;
 623
 624         dbg   = get_irn_dbg_info(node);
 625         block = get_nodes_block(node);
 626
 627         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 628         opmode = get_irn_op_mode(node);
 629         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 630         call = new_rd_Call(dbg, block, get_Mod_mem(node), irn, 4, in, mtp);
 631         set_irn_pinned(call, get_irn_pinned(node));
 632         irn = new_r_Proj(call, mode_T, pn_Call_T_result);
 633
 634         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 635                 switch (get_Proj_proj(proj)) {
 636                 case pn_Mod_M:         /* Memory result. */
 637                         /* reroute to the call */
 638                         set_Proj_pred(proj, call);
 639                         set_Proj_proj(proj, pn_Call_M);
 640                         break;
 641                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 642                         /* reroute to the call */
 643                         set_Proj_pred(proj, call);
 644                         set_Proj_proj(proj, pn_Call_X_except);
 645                         break;
 646                 case pn_Mod_res:       /* Result of computation. */
 647                         idx = get_irn_idx(proj);
 648                         assert(idx < env->n_entries);
 649                         env->entries[idx]->low_word  = new_r_Proj(irn, env->params->low_unsigned, 0);
 650                         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 651                         break;
 652                 default:
 653                         assert(0 && "unexpected Proj number");
 654                 }  /* switch */
 655                 /* mark this proj: we have handled it already, otherwise we might fall into
 656                  * out new nodes. */
 657                 mark_irn_visited(proj);
 658         }  /* for */
 659 }  /* lower_Mod */
 660
 661 /**
 662  * Translate a DivMod.
 663  *
 664  * Create two intrinsic Calls.
 665  */
 666 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env)
 667 {
 668         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod;
 669         ir_node  *resDiv = NULL;
 670         ir_node  *resMod = NULL;
 671         ir_node  *in[4];
 672         ir_mode  *opmode;
 673         dbg_info *dbg;
 674         ir_type  *mtp;
 675         int      idx;
 676         node_entry_t *entry;
 677         unsigned flags = 0;
 678
 679         /* check if both results are needed */
 680         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 681                 switch (get_Proj_proj(proj)) {
 682                 case pn_DivMod_res_div: flags |= 1; break;
 683                 case pn_DivMod_res_mod: flags |= 2; break;
 684                 default: break;
 685                 }  /* switch */
 686         }  /* for */
 687
 688         irn   = get_DivMod_left(node);
 689         entry = env->entries[get_irn_idx(irn)];
 690         assert(entry);
 691
 692         if (! entry->low_word) {
 693                 /* not ready yet, wait */
 694                 pdeq_putr(env->waitq, node);
 695                 return;
 696         }  /* if */
 697
 698         in[0] = entry->low_word;
 699         in[1] = entry->high_word;
 700
 701         irn   = get_DivMod_right(node);
 702         entry = env->entries[get_irn_idx(irn)];
 703         assert(entry);
 704
 705         if (! entry->low_word) {
 706                 /* not ready yet, wait */
 707                 pdeq_putr(env->waitq, node);
 708                 return;
 709         }  /* if */
 710
 711         in[2] = entry->low_word;
 712         in[3] = entry->high_word;
 713
 714         dbg   = get_irn_dbg_info(node);
 715         block = get_nodes_block(node);
 716
 717         mem = get_DivMod_mem(node);
 718
 719         callDiv = callMod = NULL;
 720         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 721         if (flags & 1) {
 722                 opmode = get_irn_op_mode(node);
 723                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, env);
 724                 callDiv = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 725                 set_irn_pinned(callDiv, get_irn_pinned(node));
 726                 resDiv = new_r_Proj(callDiv, mode_T, pn_Call_T_result);
 727         }  /* if */
 728         if (flags & 2) {
 729                 if (flags & 1)
 730                         mem = new_r_Proj(callDiv, mode_M, pn_Call_M);
 731                 opmode = get_irn_op_mode(node);
 732                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, env);
 733                 callMod = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 734                 set_irn_pinned(callMod, get_irn_pinned(node));
 735                 resMod = new_r_Proj(callMod, mode_T, pn_Call_T_result);
 736         }  /* if */
 737
 738         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 739                 switch (get_Proj_proj(proj)) {
 740                 case pn_DivMod_M:         /* Memory result. */
 741                         /* reroute to the first call */
 742                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 743                         set_Proj_proj(proj, pn_Call_M);
 744                         break;
 745                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 746                         /* reroute to the first call */
 747                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 748                         set_Proj_proj(proj, pn_Call_X_except);
 749                         break;
 750                 case pn_DivMod_res_div:   /* Result of Div. */
 751                         idx = get_irn_idx(proj);
 752                         assert(idx < env->n_entries);
 753                         env->entries[idx]->low_word  = new_r_Proj(resDiv, env->params->low_unsigned, 0);
 754                         env->entries[idx]->high_word = new_r_Proj(resDiv, mode,                      1);
 755                         break;
 756                 case pn_DivMod_res_mod:   /* Result of Mod. */
 757                         idx = get_irn_idx(proj);
 758                         env->entries[idx]->low_word  = new_r_Proj(resMod, env->params->low_unsigned, 0);
 759                         env->entries[idx]->high_word = new_r_Proj(resMod, mode,                      1);
 760                         break;
 761                 default:
 762                         assert(0 && "unexpected Proj number");
 763                 }  /* switch */
 764                 /* mark this proj: we have handled it already, otherwise we might fall into
 765                  * out new nodes. */
 766                 mark_irn_visited(proj);
 767         }  /* for */
 768 }  /* lower_DivMod */
 769
 770 /**
 771  * Translate a Binop.
 772  *
 773  * Create an intrinsic Call.
 774  */
 775 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env)
 776 {
 777         ir_node  *block, *irn;
 778         ir_node  *in[4];
 779         dbg_info *dbg;
 780         ir_type  *mtp;
 781         int      idx;
 782         ir_graph *irg;
 783         node_entry_t *entry;
 784
 785         irn   = get_binop_left(node);
 786         entry = env->entries[get_irn_idx(irn)];
 787         assert(entry);
 788
 789         if (! entry->low_word) {
 790                 /* not ready yet, wait */
 791                 pdeq_putr(env->waitq, node);
 792                 return;
 793         }  /* if */
 794
 795         in[0] = entry->low_word;
 796         in[1] = entry->high_word;
 797
 798         irn   = get_binop_right(node);
 799         entry = env->entries[get_irn_idx(irn)];
 800         assert(entry);
 801
 802         if (! entry->low_word) {
 803                 /* not ready yet, wait */
 804                 pdeq_putr(env->waitq, node);
 805                 return;
 806         }  /* if */
 807
 808         in[2] = entry->low_word;
 809         in[3] = entry->high_word;
 810
 811         dbg   = get_irn_dbg_info(node);
 812         block = get_nodes_block(node);
 813         irg   = current_ir_graph;
 814
 815         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 816         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 817         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 818                 irn, 4, in, mtp);
 819         set_irn_pinned(irn, get_irn_pinned(node));
 820         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
 821
 822         idx = get_irn_idx(node);
 823         assert(idx < env->n_entries);
 824         env->entries[idx]->low_word  = new_r_Proj(irn, env->params->low_unsigned, 0);
 825         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 826 }  /* lower_Binop */
 827
 828 /**
 829  * Translate a Shiftop.
 830  *
 831  * Create an intrinsic Call.
 832  */
 833 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env)
 834 {
 835         ir_node  *block, *irn;
 836         ir_node  *in[3];
 837         dbg_info *dbg;
 838         ir_type  *mtp;
 839         int      idx;
 840         ir_graph *irg;
 841         node_entry_t *entry;
 842
 843         irn   = get_binop_left(node);
 844         entry = env->entries[get_irn_idx(irn)];
 845         assert(entry);
 846
 847         if (! entry->low_word) {
 848                 /* not ready yet, wait */
 849                 pdeq_putr(env->waitq, node);
 850                 return;
 851         }  /* if */
 852
 853         in[0] = entry->low_word;
 854         in[1] = entry->high_word;
 855
 856         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 857         in[2] = get_binop_right(node);
 858         assert(get_irn_mode(in[2]) != env->params->high_signed
 859                         && get_irn_mode(in[2]) != env->params->high_unsigned);
 860
 861         dbg   = get_irn_dbg_info(node);
 862         block = get_nodes_block(node);
 863         irg  = current_ir_graph;
 864
 865         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 866         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 867         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 868                 irn, 3, in, mtp);
 869         set_irn_pinned(irn, get_irn_pinned(node));
 870         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
 871
 872         idx = get_irn_idx(node);
 873         assert(idx < env->n_entries);
 874         env->entries[idx]->low_word  = new_r_Proj(irn, env->params->low_unsigned, 0);
 875         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 876 }  /* lower_Shiftop */
 877
 878 /**
 879  * Translate a Shr and handle special cases.
 880  */
 881 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env)
 882 {
 883         ir_node  *right = get_Shr_right(node);
 884         ir_graph *irg = current_ir_graph;
 885
 886         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 887                 tarval *tv = get_Const_tarval(right);
 888
 889                 if (tarval_is_long(tv) &&
 890                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 891                         ir_node *block = get_nodes_block(node);
 892                         ir_node *left = get_Shr_left(node);
 893                         ir_node *c;
 894                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 895                         int idx = get_irn_idx(left);
 896
 897                         left = env->entries[idx]->high_word;
 898                         if (left == NULL) {
 899                                 /* not ready yet, wait */
 900                                 pdeq_putr(env->waitq, node);
 901                                 return;
 902                         }
 903
 904                         idx = get_irn_idx(node);
 905
 906                         if (shf_cnt > 0) {
 907                                 c = new_r_Const_long(irg, env->params->low_unsigned, shf_cnt);
 908                                 env->entries[idx]->low_word = new_r_Shr(block, left, c, mode);
 909                         } else {
 910                                 env->entries[idx]->low_word = left;
 911                         }  /* if */
 912                         env->entries[idx]->high_word = new_r_Const(irg, get_mode_null(mode));
 913
 914                         return;
 915                 }  /* if */
 916         }  /* if */
 917         lower_Shiftop(node, mode, env);
 918 }  /* lower_Shr */
 919
 920 /**
 921  * Translate a Shl and handle special cases.
 922  */
 923 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env)
 924 {
 925         ir_node  *right = get_Shl_right(node);
 926         ir_graph *irg = current_ir_graph;
 927
 928         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 929                 tarval *tv = get_Const_tarval(right);
 930
 931                 if (tarval_is_long(tv) &&
 932                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 933                         ir_mode *mode_l;
 934                         ir_node *block = get_nodes_block(node);
 935                         ir_node *left = get_Shl_left(node);
 936                         ir_node *c;
 937                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 938                         int idx = get_irn_idx(left);
 939
 940                         left = env->entries[idx]->low_word;
 941                         if (left == NULL) {
 942                                 /* not ready yet, wait */
 943                                 pdeq_putr(env->waitq, node);
 944                                 return;
 945                         }
 946
 947                         left = new_r_Conv(block, left, mode);
 948                         idx = get_irn_idx(node);
 949
 950                         mode_l = env->params->low_unsigned;
 951                         if (shf_cnt > 0) {
 952                                 c = new_r_Const_long(irg, mode_l, shf_cnt);
 953                                 env->entries[idx]->high_word = new_r_Shl(block, left, c, mode);
 954                         } else {
 955                                 env->entries[idx]->high_word = left;
 956                         }  /* if */
 957                         env->entries[idx]->low_word  = new_r_Const(irg, get_mode_null(mode_l));
 958
 959                         return;
 960                 }  /* if */
 961         }  /* if */
 962         lower_Shiftop(node, mode, env);
 963 }  /* lower_Shl */
 964
 965 /**
 966  * Translate a Shrs and handle special cases.
 967  */
 968 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env)
 969 {
 970         ir_node  *right = get_Shrs_right(node);
 971         ir_graph *irg = current_ir_graph;
 972
 973         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 974                 tarval *tv = get_Const_tarval(right);
 975
 976                 if (tarval_is_long(tv) &&
 977                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 978                         ir_node *block   = get_nodes_block(node);
 979                         ir_node *left    = get_Shrs_left(node);
 980                         long     shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 981                         int      idx     = get_irn_idx(left);
 982                         ir_mode *mode_l;
 983                         ir_node *low;
 984                         ir_node *c;
 985
 986                         left = env->entries[idx]->high_word;
 987                         if (left == NULL) {
 988                                 /* not ready yet, wait */
 989                                 pdeq_putr(env->waitq, node);
 990                                 return;
 991                         }
 992
 993                         idx    = get_irn_idx(node);
 994                         mode_l = env->params->low_unsigned;
 995                         if (shf_cnt > 0) {
 996                                 c   = new_r_Const_long(irg, mode_l, shf_cnt);
 997                                 low = new_r_Shrs(block, left, c, mode);
 998                         } else {
 999                                 low = left;
1000                         }  /* if */
1001                         /* low word is expected to have mode_l */
1002                         env->entries[idx]->low_word = new_r_Conv(block, low, mode_l);
1003
1004                         c = new_r_Const_long(irg, mode_l, get_mode_size_bits(mode) - 1);
1005                         env->entries[idx]->high_word = new_r_Shrs(block, left, c, mode);
1006
1007                         return;
1008                 }  /* if */
1009         }  /* if */
1010         lower_Shiftop(node, mode, env);
1011 }  /* lower_Shrs */
1012
1013 /**
1014  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1015  */
1016 static void prepare_links_and_handle_rotl(ir_node *node, void *env)
1017 {
1018         lower_env_t *lenv = env;
1019
1020         if (is_Rotl(node)) {
1021                 ir_mode *mode = get_irn_op_mode(node);
1022                         if (mode == lenv->params->high_signed ||
1023                             mode == lenv->params->high_unsigned) {
1024                                 ir_node  *right = get_Rotl_right(node);
1025                                 ir_node  *left, *shl, *shr, *or, *block, *sub, *c;
1026                                 ir_mode  *omode, *rmode;
1027                                 dbg_info *dbg;
1028                                 optimization_state_t state;
1029
1030                                 if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1031                                         tarval *tv = get_Const_tarval(right);
1032
1033                                         if (tarval_is_long(tv) &&
1034                                             get_tarval_long(tv) == (long)get_mode_size_bits(mode)) {
1035                                                 /* will be optimized in lower_Rotl() */
1036                                                 return;
1037                                         }
1038                                 }
1039
1040                                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) and lower those */
1041                                 dbg   = get_irn_dbg_info(node);
1042                                 omode = get_irn_mode(node);
1043                                 left  = get_Rotl_left(node);
1044                                 block = get_nodes_block(node);
1045                                 shl   = new_rd_Shl(dbg, block, left, right, omode);
1046                                 rmode = get_irn_mode(right);
1047                                 c     = new_Const_long(rmode, get_mode_size_bits(omode));
1048                                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
1049                                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
1050
1051                                 /* optimization must be switched off here, or we will get the Rotl back */
1052                                 save_optimization_state(&state);
1053                                 set_opt_algebraic_simplification(0);
1054                                 or = new_rd_Or(dbg, block, shl, shr, omode);
1055                                 restore_optimization_state(&state);
1056
1057                                 exchange(node, or);
1058
1059                                 /* do lowering on the new nodes */
1060                                 prepare_links(shl, env);
1061                                 prepare_links(c, env);
1062                                 prepare_links(sub, env);
1063                                 prepare_links(shr, env);
1064                                 prepare_links(or, env);
1065                         }
1066         } else {
1067                 prepare_links(node, env);
1068         }
1069 }
1070
1071 /**
1072  * Translate a special case Rotl(x, sizeof(w)).
1073  */
1074 static void lower_Rotl(ir_node *node, ir_mode *mode, lower_env_t *env)
1075 {
1076         ir_node *right = get_Rotl_right(node);
1077         ir_node *left = get_Rotl_left(node);
1078         ir_node *h, *l;
1079         int idx = get_irn_idx(left);
1080         (void) right;
1081         (void) mode;
1082
1083         assert(get_mode_arithmetic(mode) == irma_twos_complement &&
1084                is_Const(right) && tarval_is_long(get_Const_tarval(right)) &&
1085                get_tarval_long(get_Const_tarval(right)) == (long)get_mode_size_bits(mode));
1086
1087         l = env->entries[idx]->low_word;
1088         h = env->entries[idx]->high_word;
1089         idx = get_irn_idx(node);
1090
1091         env->entries[idx]->low_word  = h;
1092         env->entries[idx]->high_word = l;
1093 }  /* lower_Rotl */
1094
1095 /**
1096  * Translate an Unop.
1097  *
1098  * Create an intrinsic Call.
1099  */
1100 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env)
1101 {
1102         ir_node  *block, *irn;
1103         ir_node  *in[2];
1104         dbg_info *dbg;
1105         ir_type  *mtp;
1106         int      idx;
1107         node_entry_t *entry;
1108
1109         irn   = get_unop_op(node);
1110         entry = env->entries[get_irn_idx(irn)];
1111         assert(entry);
1112
1113         if (! entry->low_word) {
1114                 /* not ready yet, wait */
1115                 pdeq_putr(env->waitq, node);
1116                 return;
1117         }  /* if */
1118
1119         in[0] = entry->low_word;
1120         in[1] = entry->high_word;
1121
1122         dbg   = get_irn_dbg_info(node);
1123         block = get_nodes_block(node);
1124
1125         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1126         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
1127         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
1128                 irn, 2, in, mtp);
1129         set_irn_pinned(irn, get_irn_pinned(node));
1130         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
1131
1132         idx = get_irn_idx(node);
1133         assert(idx < env->n_entries);
1134         env->entries[idx]->low_word  = new_r_Proj(irn, env->params->low_unsigned, 0);
1135         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
1136 }  /* lower_Unop */
1137
1138 /**
1139  * Translate a logical Binop.
1140  *
1141  * Create two logical Binops.
1142  */
1143 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1144                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1145         ir_node  *block, *irn;
1146         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1147         dbg_info *dbg;
1148         int      idx;
1149         ir_graph *irg;
1150         node_entry_t *entry;
1151
1152         irn   = get_binop_left(node);
1153         entry = env->entries[get_irn_idx(irn)];
1154         assert(entry);
1155
1156         if (! entry->low_word) {
1157                 /* not ready yet, wait */
1158                 pdeq_putr(env->waitq, node);
1159                 return;
1160         }  /* if */
1161
1162         lop_l = entry->low_word;
1163         lop_h = entry->high_word;
1164
1165         irn   = get_binop_right(node);
1166         entry = env->entries[get_irn_idx(irn)];
1167         assert(entry);
1168
1169         if (! entry->low_word) {
1170                 /* not ready yet, wait */
1171                 pdeq_putr(env->waitq, node);
1172                 return;
1173         }  /* if */
1174
1175         rop_l = entry->low_word;
1176         rop_h = entry->high_word;
1177
1178         dbg = get_irn_dbg_info(node);
1179         block = get_nodes_block(node);
1180
1181         idx = get_irn_idx(node);
1182         assert(idx < env->n_entries);
1183         irg = current_ir_graph;
1184         env->entries[idx]->low_word  = constr_rd(dbg, block, lop_l, rop_l, env->params->low_unsigned);
1185         env->entries[idx]->high_word = constr_rd(dbg, block, lop_h, rop_h, mode);
1186 }  /* lower_Binop_logical */
1187
1188 /** create a logical operation transformation */
1189 #define lower_logical(op)                                                \
1190 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1191         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1192 }
1193
1194 lower_logical(And)
1195 lower_logical(Or)
1196 lower_logical(Eor)
1197
1198 /**
1199  * Translate a Not.
1200  *
1201  * Create two logical Nots.
1202  */
1203 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env)
1204 {
1205         ir_node  *block, *irn;
1206         ir_node  *op_l, *op_h;
1207         dbg_info *dbg;
1208         int      idx;
1209         node_entry_t *entry;
1210
1211         irn   = get_Not_op(node);
1212         entry = env->entries[get_irn_idx(irn)];
1213         assert(entry);
1214
1215         if (! entry->low_word) {
1216                 /* not ready yet, wait */
1217                 pdeq_putr(env->waitq, node);
1218                 return;
1219         }  /* if */
1220
1221         op_l = entry->low_word;
1222         op_h = entry->high_word;
1223
1224         dbg   = get_irn_dbg_info(node);
1225         block = get_nodes_block(node);
1226
1227         idx = get_irn_idx(node);
1228         assert(idx < env->n_entries);
1229         env->entries[idx]->low_word  = new_rd_Not(dbg, block, op_l, env->params->low_unsigned);
1230         env->entries[idx]->high_word = new_rd_Not(dbg, block, op_h, mode);
1231 }  /* lower_Not */
1232
1233 /**
1234  * Translate a Cond.
1235  */
1236 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env)
1237 {
1238         ir_node *cmp, *left, *right, *block;
1239         ir_node *sel = get_Cond_selector(node);
1240         ir_mode *m = get_irn_mode(sel);
1241         int     idx;
1242         (void) mode;
1243
1244         if (m == mode_b) {
1245                 node_entry_t *lentry, *rentry;
1246                 ir_node  *proj, *projT = NULL, *projF = NULL;
1247                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1248                 ir_node  *projHF, *projHT;
1249                 ir_node  *dst_blk;
1250                 pn_Cmp   pnc;
1251                 ir_graph *irg;
1252                 dbg_info *dbg;
1253
1254                 if (!is_Proj(sel))
1255                         return;
1256
1257                 cmp   = get_Proj_pred(sel);
1258                 if (!is_Cmp(cmp))
1259                         return;
1260
1261                 left  = get_Cmp_left(cmp);
1262                 idx   = get_irn_idx(left);
1263                 lentry = env->entries[idx];
1264
1265                 if (! lentry) {
1266                         /* a normal Cmp */
1267                         return;
1268                 }  /* if */
1269
1270                 right = get_Cmp_right(cmp);
1271                 idx   = get_irn_idx(right);
1272                 rentry = env->entries[idx];
1273                 assert(rentry);
1274
1275                 if (! lentry->low_word || !rentry->low_word) {
1276                         /* not yet ready */
1277                         pdeq_putr(env->waitq, node);
1278                         return;
1279                 }  /* if */
1280
1281                 /* all right, build the code */
1282                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1283                         long proj_nr = get_Proj_proj(proj);
1284
1285                         if (proj_nr == pn_Cond_true) {
1286                                 assert(projT == NULL && "more than one Proj(true)");
1287                                 projT = proj;
1288                         } else {
1289                                 assert(proj_nr == pn_Cond_false);
1290                                 assert(projF == NULL && "more than one Proj(false)");
1291                                 projF = proj;
1292                         }  /* if */
1293                         mark_irn_visited(proj);
1294                 }  /* for */
1295                 assert(projT && projF);
1296
1297                 /* create a new high compare */
1298                 block = get_nodes_block(node);
1299                 irg   = get_Block_irg(block);
1300                 dbg   = get_irn_dbg_info(cmp);
1301                 pnc   = get_Proj_proj(sel);
1302
1303                 if (is_Const(right) && is_Const_null(right)) {
1304                         if (pnc == pn_Cmp_Eq || pnc == pn_Cmp_Lg) {
1305                                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1306                                 ir_mode *mode = env->params->low_unsigned;
1307                                 ir_node *low  = new_r_Conv(block, lentry->low_word, mode);
1308                                 ir_node *high = new_r_Conv(block, lentry->high_word, mode);
1309                                 ir_node *or   = new_rd_Or(dbg, block, low, high, mode);
1310                                 ir_node *cmp  = new_rd_Cmp(dbg, block, or, new_Const_long(mode, 0));
1311
1312                                 ir_node *proj = new_r_Proj(cmp, mode_b, pnc);
1313                                 set_Cond_selector(node, proj);
1314                                 return;
1315                         }
1316                 }
1317
1318                 cmpH = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word);
1319
1320                 if (pnc == pn_Cmp_Eq) {
1321                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1322                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1323
1324                         assert(entry);
1325                         dst_blk = entry->value;
1326
1327                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Eq);
1328                         dbg = get_irn_dbg_info(node);
1329                         irn = new_rd_Cond(dbg, block, irn);
1330
1331                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1332                         mark_irn_visited(projHF);
1333                         exchange(projF, projHF);
1334
1335                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1336                         mark_irn_visited(projHT);
1337
1338                         new_bl = new_r_Block(irg, 1, &projHT);
1339
1340                         dbg   = get_irn_dbg_info(cmp);
1341                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1342                         irn = new_r_Proj(cmpL, mode_b, pn_Cmp_Eq);
1343                         dbg = get_irn_dbg_info(node);
1344                         irn = new_rd_Cond(dbg, new_bl, irn);
1345
1346                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1347                         mark_irn_visited(proj);
1348                         add_block_cf_input(dst_blk, projHF, proj);
1349
1350                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1351                         mark_irn_visited(proj);
1352                         exchange(projT, proj);
1353                 } else if (pnc == pn_Cmp_Lg) {
1354                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1355                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1356
1357                         assert(entry);
1358                         dst_blk = entry->value;
1359
1360                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Lg);
1361                         dbg = get_irn_dbg_info(node);
1362                         irn = new_rd_Cond(dbg, block, irn);
1363
1364                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1365                         mark_irn_visited(projHT);
1366                         exchange(projT, projHT);
1367
1368                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1369                         mark_irn_visited(projHF);
1370
1371                         new_bl = new_r_Block(irg, 1, &projHF);
1372
1373                         dbg   = get_irn_dbg_info(cmp);
1374                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1375                         irn = new_r_Proj(cmpL, mode_b, pn_Cmp_Lg);
1376                         dbg = get_irn_dbg_info(node);
1377                         irn = new_rd_Cond(dbg, new_bl, irn);
1378
1379                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1380                         mark_irn_visited(proj);
1381                         add_block_cf_input(dst_blk, projHT, proj);
1382
1383                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1384                         mark_irn_visited(proj);
1385                         exchange(projF, proj);
1386                 } else {
1387                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1388                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1389                         pmap_entry *entry;
1390
1391                         entry = pmap_find(env->proj_2_block, projT);
1392                         assert(entry);
1393                         dstT = entry->value;
1394
1395                         entry = pmap_find(env->proj_2_block, projF);
1396                         assert(entry);
1397                         dstF = entry->value;
1398
1399                         irn = new_r_Proj(cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1400                         dbg = get_irn_dbg_info(node);
1401                         irn = new_rd_Cond(dbg, block, irn);
1402
1403                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1404                         mark_irn_visited(projHT);
1405                         exchange(projT, projHT);
1406                         projT = projHT;
1407
1408                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1409                         mark_irn_visited(projHF);
1410
1411                         newbl_eq = new_r_Block(irg, 1, &projHF);
1412
1413                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Eq);
1414                         irn = new_rd_Cond(dbg, newbl_eq, irn);
1415
1416                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1417                         mark_irn_visited(proj);
1418                         exchange(projF, proj);
1419                         projF = proj;
1420
1421                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1422                         mark_irn_visited(proj);
1423
1424                         newbl_l = new_r_Block(irg, 1, &proj);
1425
1426                         dbg   = get_irn_dbg_info(cmp);
1427                         cmpL = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word);
1428                         irn = new_r_Proj(cmpL, mode_b, pnc);
1429                         dbg = get_irn_dbg_info(node);
1430                         irn = new_rd_Cond(dbg, newbl_l, irn);
1431
1432                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1433                         mark_irn_visited(proj);
1434                         add_block_cf_input(dstT, projT, proj);
1435
1436                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1437                         mark_irn_visited(proj);
1438                         add_block_cf_input(dstF, projF, proj);
1439                 }  /* if */
1440
1441                 /* we have changed the control flow */
1442                 env->flags |= CF_CHANGED;
1443         } else {
1444                 idx = get_irn_idx(sel);
1445
1446                 if (env->entries[idx]) {
1447                         /*
1448                            Bad, a jump-table with double-word index.
1449                            This should not happen, but if it does we handle
1450                            it like a Conv were between (in other words, ignore
1451                            the high part.
1452                          */
1453
1454                         if (! env->entries[idx]->low_word) {
1455                                 /* not ready yet, wait */
1456                                 pdeq_putr(env->waitq, node);
1457                                 return;
1458                         }  /* if */
1459                         set_Cond_selector(node, env->entries[idx]->low_word);
1460                 }  /* if */
1461         }  /* if */
1462 }  /* lower_Cond */
1463
1464 /**
1465  * Translate a Conv to higher_signed
1466  */
1467 static void lower_Conv_to_Ll(ir_node *node, lower_env_t *env)
1468 {
1469         ir_mode  *omode        = get_irn_mode(node);
1470         ir_node  *op           = get_Conv_op(node);
1471         ir_mode  *imode        = get_irn_mode(op);
1472         int      idx           = get_irn_idx(node);
1473         ir_graph *irg          = current_ir_graph;
1474         ir_node  *block        = get_nodes_block(node);
1475         dbg_info *dbg          = get_irn_dbg_info(node);
1476         node_entry_t *entry = env->entries[idx];
1477         ir_mode  *low_unsigned = env->params->low_unsigned;
1478         ir_mode  *low_signed
1479                 = mode_is_signed(omode) ? env->params->low_signed : low_unsigned;
1480
1481         assert(idx < env->n_entries);
1482
1483         if (mode_is_int(imode) || mode_is_reference(imode)) {
1484                 if (imode == env->params->high_signed
1485                                 || imode == env->params->high_unsigned) {
1486                         /* a Conv from Lu to Ls or Ls to Lu */
1487                         int           op_idx   = get_irn_idx(op);
1488                         node_entry_t *op_entry = env->entries[op_idx];
1489
1490                         if (! op_entry->low_word) {
1491                                 /* not ready yet, wait */
1492                                 pdeq_putr(env->waitq, node);
1493                                 return;
1494                         }
1495                         entry->low_word  = op_entry->low_word;
1496                         entry->high_word = new_rd_Conv(dbg, block, op_entry->high_word,
1497                                                        low_signed);
1498                 } else {
1499                         /* simple case: create a high word */
1500                         if (imode != low_unsigned)
1501                                 op = new_rd_Conv(dbg, block, op, low_unsigned);
1502
1503                         entry->low_word = op;
1504
1505                         if (mode_is_signed(imode)) {
1506                                 int      c       = get_mode_size_bits(low_signed) - 1;
1507                                 ir_node *cnst    = new_Const_long(low_unsigned, c);
1508                                 if (get_irn_mode(op) != low_signed)
1509                                         op = new_rd_Conv(dbg, block, op, low_signed);
1510                                 entry->high_word = new_rd_Shrs(dbg, block, op, cnst,
1511                                                                low_signed);
1512                         } else {
1513                                 entry->high_word = new_Const(get_mode_null(low_signed));
1514                         }
1515                 }
1516         } else if (imode == mode_b) {
1517                 entry->low_word = new_rd_Conv(dbg, block, op, low_unsigned);
1518                 entry->high_word = new_Const(get_mode_null(low_signed));
1519         } else {
1520                 ir_node *irn, *call;
1521                 ir_type *mtp = get_conv_type(imode, omode, env);
1522
1523                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1524                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1525                 set_irn_pinned(call, get_irn_pinned(node));
1526                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1527
1528                 entry->low_word  = new_r_Proj(irn, low_unsigned, 0);
1529                 entry->high_word = new_r_Proj(irn, low_signed, 1);
1530         }
1531 }
1532
1533 /**
1534  * Translate a Conv from higher_unsigned
1535  */
1536 static void lower_Conv_from_Ll(ir_node *node, lower_env_t *env)
1537 {
1538         ir_node      *op    = get_Conv_op(node);
1539         ir_mode      *omode = get_irn_mode(node);
1540         ir_node      *block = get_nodes_block(node);
1541         dbg_info     *dbg   = get_irn_dbg_info(node);
1542         int          idx    = get_irn_idx(op);
1543         ir_graph     *irg   = current_ir_graph;
1544         node_entry_t *entry = env->entries[idx];
1545
1546         assert(idx < env->n_entries);
1547
1548         if (! entry->low_word) {
1549                 /* not ready yet, wait */
1550                 pdeq_putr(env->waitq, node);
1551                 return;
1552         }
1553
1554         if (mode_is_int(omode) || mode_is_reference(omode)) {
1555                 op = entry->low_word;
1556
1557                 /* simple case: create a high word */
1558                 if (omode != env->params->low_unsigned)
1559                         op = new_rd_Conv(dbg, block, op, omode);
1560
1561                 set_Conv_op(node, op);
1562         } else if (omode == mode_b) {
1563                 /* llu ? true : false  <=> (low|high) ? true : false */
1564                 ir_mode *mode = env->params->low_unsigned;
1565                 ir_node *or   = new_rd_Or(dbg, block, entry->low_word, entry->high_word,
1566                                           mode);
1567                 set_Conv_op(node, or);
1568         } else {
1569                 ir_node *irn, *call, *in[2];
1570                 ir_mode *imode = get_irn_mode(op);
1571                 ir_type *mtp   = get_conv_type(imode, omode, env);
1572
1573                 irn   = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1574                 in[0] = entry->low_word;
1575                 in[1] = entry->high_word;
1576
1577                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1578                 set_irn_pinned(call, get_irn_pinned(node));
1579                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1580
1581                 exchange(node, new_r_Proj(irn, omode, 0));
1582         }
1583 }
1584
1585 /**
1586  * Translate a Conv.
1587  */
1588 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env)
1589 {
1590         mode = get_irn_mode(node);
1591
1592         if (mode == env->params->high_signed
1593                         || mode == env->params->high_unsigned) {
1594                 lower_Conv_to_Ll(node, env);
1595         } else {
1596                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1597
1598                 if (mode == env->params->high_signed
1599                                 || mode == env->params->high_unsigned) {
1600                         lower_Conv_from_Ll(node, env);
1601                 }
1602         }
1603 }
1604
1605 /**
1606  * Lower the method type.
1607  *
1608  * @param mtp  the method type to lower
1609  * @param ent  the lower environment
1610  *
1611  * @return the lowered type
1612  */
1613 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env)
1614 {
1615         pmap_entry *entry;
1616         ident      *lid;
1617         ir_type    *res, *value_type;
1618
1619         if (is_lowered_type(mtp))
1620                 return mtp;
1621
1622         entry = pmap_find(lowered_type, mtp);
1623         if (! entry) {
1624                 int i, n, r, n_param, n_res;
1625
1626                 /* count new number of params */
1627                 n_param = n = get_method_n_params(mtp);
1628                 for (i = n_param - 1; i >= 0; --i) {
1629                         ir_type *tp = get_method_param_type(mtp, i);
1630
1631                         if (is_Primitive_type(tp)) {
1632                                 ir_mode *mode = get_type_mode(tp);
1633
1634                                 if (mode == env->params->high_signed ||
1635                                         mode == env->params->high_unsigned)
1636                                         ++n_param;
1637                         }  /* if */
1638                 }  /* for */
1639
1640                 /* count new number of results */
1641                 n_res = r = get_method_n_ress(mtp);
1642                 for (i = n_res - 1; i >= 0; --i) {
1643                         ir_type *tp = get_method_res_type(mtp, i);
1644
1645                         if (is_Primitive_type(tp)) {
1646                                 ir_mode *mode = get_type_mode(tp);
1647
1648                                 if (mode == env->params->high_signed ||
1649                                         mode == env->params->high_unsigned)
1650                                         ++n_res;
1651                         }  /* if */
1652                 }  /* for */
1653
1654                 res = new_type_method(n_param, n_res);
1655
1656                 /* set param types and result types */
1657                 for (i = n_param = 0; i < n; ++i) {
1658                         ir_type *tp = get_method_param_type(mtp, i);
1659
1660                         if (is_Primitive_type(tp)) {
1661                                 ir_mode *mode = get_type_mode(tp);
1662
1663                                 if (mode == env->params->high_signed) {
1664                                         set_method_param_type(res, n_param++, tp_u);
1665                                         set_method_param_type(res, n_param++, tp_s);
1666                                 } else if (mode == env->params->high_unsigned) {
1667                                         set_method_param_type(res, n_param++, tp_u);
1668                                         set_method_param_type(res, n_param++, tp_u);
1669                                 } else {
1670                                         set_method_param_type(res, n_param++, tp);
1671                                 }  /* if */
1672                         } else {
1673                                 set_method_param_type(res, n_param++, tp);
1674                         }  /* if */
1675                 }  /* for */
1676                 for (i = n_res = 0; i < r; ++i) {
1677                         ir_type *tp = get_method_res_type(mtp, i);
1678
1679                         if (is_Primitive_type(tp)) {
1680                                 ir_mode *mode = get_type_mode(tp);
1681
1682                                 if (mode == env->params->high_signed) {
1683                                         set_method_res_type(res, n_res++, tp_u);
1684                                         set_method_res_type(res, n_res++, tp_s);
1685                                 } else if (mode == env->params->high_unsigned) {
1686                                         set_method_res_type(res, n_res++, tp_u);
1687                                         set_method_res_type(res, n_res++, tp_u);
1688                                 } else {
1689                                         set_method_res_type(res, n_res++, tp);
1690                                 }  /* if */
1691                         } else {
1692                                 set_method_res_type(res, n_res++, tp);
1693                         }  /* if */
1694                 }  /* for */
1695                 set_lowered_type(mtp, res);
1696                 pmap_insert(lowered_type, mtp, res);
1697
1698                 value_type = get_method_value_param_type(mtp);
1699                 if (value_type != NULL) {
1700                         /* this creates a new value parameter type */
1701                         (void)get_method_value_param_ent(res, 0);
1702
1703                         /* set new param positions */
1704                         for (i = n_param = 0; i < n; ++i) {
1705                                 ir_type   *tp  = get_method_param_type(mtp, i);
1706                                 ident     *id  = get_method_param_ident(mtp, i);
1707                                 ir_entity *ent = get_method_value_param_ent(mtp, i);
1708
1709                                 set_entity_link(ent, INT_TO_PTR(n_param));
1710                                 if (is_Primitive_type(tp)) {
1711                                         ir_mode *mode = get_type_mode(tp);
1712
1713                                         if (mode == env->params->high_signed || mode == env->params->high_unsigned) {
1714                                                 if (id != NULL) {
1715                                                         lid = id_mangle(id, env->first_id);
1716                                                         set_method_param_ident(res, n_param, lid);
1717                                                         set_entity_ident(get_method_value_param_ent(res, n_param), lid);
1718                                                         lid = id_mangle(id, env->next_id);
1719                                                         set_method_param_ident(res, n_param + 1, lid);
1720                                                         set_entity_ident(get_method_value_param_ent(res, n_param + 1), lid);
1721                                                 }  /* if */
1722                                                 n_param += 2;
1723                                                 continue;
1724                                         }  /* if */
1725                                 }  /* if */
1726                                 if (id != NULL) {
1727                                         set_method_param_ident(res, n_param, id);
1728                                         set_entity_ident(get_method_value_param_ent(res, n_param), id);
1729                                 }  /* if */
1730                                 ++n_param;
1731                         }  /* for */
1732
1733                         set_lowered_type(value_type, get_method_value_param_type(res));
1734                 }  /* if */
1735         } else {
1736                 res = entry->value;
1737         }  /* if */
1738         return res;
1739 }  /* lower_mtp */
1740
1741 /**
1742  * Translate a Return.
1743  */
1744 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env)
1745 {
1746         ir_graph  *irg = current_ir_graph;
1747         ir_entity *ent = get_irg_entity(irg);
1748         ir_type   *mtp = get_entity_type(ent);
1749         ir_node   **in;
1750         int       i, j, n, idx;
1751         int       need_conv = 0;
1752         (void) mode;
1753
1754         /* check if this return must be lowered */
1755         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1756                 ir_node *pred = get_Return_res(node, i);
1757                 ir_mode *mode = get_irn_op_mode(pred);
1758
1759                 if (mode == env->params->high_signed ||
1760                         mode == env->params->high_unsigned) {
1761                         idx = get_irn_idx(pred);
1762                         if (! env->entries[idx]->low_word) {
1763                                 /* not ready yet, wait */
1764                                 pdeq_putr(env->waitq, node);
1765                                 return;
1766                         }  /* if */
1767                         need_conv = 1;
1768                 }  /* if */
1769         }  /* for */
1770         if (! need_conv)
1771                 return;
1772
1773         ent = get_irg_entity(irg);
1774         mtp = get_entity_type(ent);
1775
1776         mtp = lower_mtp(mtp, env);
1777         set_entity_type(ent, mtp);
1778
1779         /* create a new in array */
1780         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1781         in[0] = get_Return_mem(node);
1782
1783         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1784                 ir_node *pred = get_Return_res(node, i);
1785
1786                 idx = get_irn_idx(pred);
1787                 assert(idx < env->n_entries);
1788
1789                 if (env->entries[idx]) {
1790                         in[++j] = env->entries[idx]->low_word;
1791                         in[++j] = env->entries[idx]->high_word;
1792                 } else {
1793                         in[++j] = pred;
1794                 }  /* if */
1795         }  /* for */
1796
1797         set_irn_in(node, j+1, in);
1798 }  /* lower_Return */
1799
1800 /**
1801  * Translate the parameters.
1802  */
1803 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env)
1804 {
1805         ir_graph  *irg = get_irn_irg(node);
1806         ir_entity *ent = get_irg_entity(irg);
1807         ir_type   *tp  = get_entity_type(ent);
1808         ir_type   *mtp;
1809         long      *new_projs;
1810         int       i, j, n_params, rem;
1811         ir_node   *proj, *args;
1812         (void) mode;
1813
1814         if (is_lowered_type(tp)) {
1815                 mtp = get_associated_type(tp);
1816         } else {
1817                 mtp = tp;
1818         }  /* if */
1819         assert(! is_lowered_type(mtp));
1820
1821         n_params = get_method_n_params(mtp);
1822         if (n_params <= 0)
1823                 return;
1824
1825         NEW_ARR_A(long, new_projs, n_params);
1826
1827         /* first check if we have parameters that must be fixed */
1828         for (i = j = 0; i < n_params; ++i, ++j) {
1829                 ir_type *tp = get_method_param_type(mtp, i);
1830
1831                 new_projs[i] = j;
1832                 if (is_Primitive_type(tp)) {
1833                         ir_mode *mode = get_type_mode(tp);
1834
1835                         if (mode == env->params->high_signed ||
1836                                 mode == env->params->high_unsigned)
1837                                 ++j;
1838                 }  /* if */
1839         }  /* for */
1840         if (i == j)
1841                 return;
1842
1843         mtp = lower_mtp(mtp, env);
1844         set_entity_type(ent, mtp);
1845
1846         /* switch off optimization for new Proj nodes or they might be CSE'ed
1847            with not patched one's */
1848         rem = get_optimize();
1849         set_optimize(0);
1850
1851         /* ok, fix all Proj's and create new ones */
1852         args = get_irg_args(irg);
1853         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1854                 ir_node *pred = get_Proj_pred(proj);
1855                 long proj_nr;
1856                 int idx;
1857                 ir_mode *mode;
1858                 dbg_info *dbg;
1859
1860                 /* do not visit this node again */
1861                 mark_irn_visited(proj);
1862
1863                 if (pred != args)
1864                         continue;
1865
1866                 proj_nr = get_Proj_proj(proj);
1867                 set_Proj_proj(proj, new_projs[proj_nr]);
1868
1869                 idx = get_irn_idx(proj);
1870                 if (env->entries[idx]) {
1871                         ir_mode *low_mode = env->params->low_unsigned;
1872
1873                         mode = get_irn_mode(proj);
1874
1875                         if (mode == env->params->high_signed) {
1876                                 mode = env->params->low_signed;
1877                         } else {
1878                                 mode = env->params->low_unsigned;
1879                         }  /* if */
1880
1881                         dbg = get_irn_dbg_info(proj);
1882                         env->entries[idx]->low_word  =
1883                                 new_rd_Proj(dbg, args, low_mode, new_projs[proj_nr]);
1884                         env->entries[idx]->high_word =
1885                                 new_rd_Proj(dbg, args, mode, new_projs[proj_nr] + 1);
1886                 }  /* if */
1887         }  /* for */
1888         set_optimize(rem);
1889 }  /* lower_Start */
1890
1891 /**
1892  * Translate a Call.
1893  */
1894 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env)
1895 {
1896         ir_type  *tp = get_Call_type(node);
1897         ir_type  *call_tp;
1898         ir_node  **in, *proj, *results;
1899         int      n_params, n_res, need_lower = 0;
1900         int      i, j;
1901         long     *res_numbers = NULL;
1902         (void) mode;
1903
1904         if (is_lowered_type(tp)) {
1905                 call_tp = get_associated_type(tp);
1906         } else {
1907                 call_tp = tp;
1908         }  /* if */
1909
1910         assert(! is_lowered_type(call_tp));
1911
1912         n_params = get_method_n_params(call_tp);
1913         for (i = 0; i < n_params; ++i) {
1914                 ir_type *tp = get_method_param_type(call_tp, i);
1915
1916                 if (is_Primitive_type(tp)) {
1917                         ir_mode *mode = get_type_mode(tp);
1918
1919                         if (mode == env->params->high_signed ||
1920                                 mode == env->params->high_unsigned) {
1921                                 need_lower = 1;
1922                                 break;
1923                         }  /* if */
1924                 }  /* if */
1925         }  /* for */
1926         n_res = get_method_n_ress(call_tp);
1927         if (n_res > 0) {
1928                 NEW_ARR_A(long, res_numbers, n_res);
1929
1930                 for (i = j = 0; i < n_res; ++i, ++j) {
1931                         ir_type *tp = get_method_res_type(call_tp, i);
1932
1933                         res_numbers[i] = j;
1934                         if (is_Primitive_type(tp)) {
1935                                 ir_mode *mode = get_type_mode(tp);
1936
1937                                 if (mode == env->params->high_signed ||
1938                                         mode == env->params->high_unsigned) {
1939                                         need_lower = 1;
1940                                         ++j;
1941                                 }  /* if */
1942                         }  /* if */
1943                 }  /* for */
1944         }  /* if */
1945
1946         if (! need_lower)
1947                 return;
1948
1949         /* let's lower it */
1950         call_tp = lower_mtp(call_tp, env);
1951         set_Call_type(node, call_tp);
1952
1953         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1954
1955         in[0] = get_Call_mem(node);
1956         in[1] = get_Call_ptr(node);
1957
1958         for (j = 2, i = 0; i < n_params; ++i) {
1959                 ir_node *pred = get_Call_param(node, i);
1960                 int     idx = get_irn_idx(pred);
1961
1962                 if (env->entries[idx]) {
1963                         if (! env->entries[idx]->low_word) {
1964                                 /* not ready yet, wait */
1965                                 pdeq_putr(env->waitq, node);
1966                                 return;
1967                         }
1968                         in[j++] = env->entries[idx]->low_word;
1969                         in[j++] = env->entries[idx]->high_word;
1970                 } else {
1971                         in[j++] = pred;
1972                 }  /* if */
1973         }  /* for */
1974
1975         set_irn_in(node, j, in);
1976
1977         /* fix the results */
1978         results = NULL;
1979         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1980                 long proj_nr = get_Proj_proj(proj);
1981
1982                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
1983                         /* found the result proj */
1984                         results = proj;
1985                         break;
1986                 }  /* if */
1987         }  /* for */
1988
1989         if (results) {          /* there are results */
1990                 int rem = get_optimize();
1991
1992                 /* switch off optimization for new Proj nodes or they might be CSE'ed
1993                    with not patched one's */
1994                 set_optimize(0);
1995                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
1996                         if (get_Proj_pred(proj) == results) {
1997                                 long proj_nr = get_Proj_proj(proj);
1998                                 int idx;
1999
2000                                 /* found a result */
2001                                 set_Proj_proj(proj, res_numbers[proj_nr]);
2002                                 idx = get_irn_idx(proj);
2003                                 if (env->entries[idx]) {
2004                                         ir_mode *mode = get_irn_mode(proj);
2005                                         ir_mode *low_mode = env->params->low_unsigned;
2006                                         dbg_info *dbg;
2007
2008                                         if (mode == env->params->high_signed) {
2009                                                 mode = env->params->low_signed;
2010                                         } else {
2011                                                 mode = env->params->low_unsigned;
2012                                         }  /* if */
2013
2014                                         dbg = get_irn_dbg_info(proj);
2015                                         env->entries[idx]->low_word  =
2016                                                 new_rd_Proj(dbg, results, low_mode, res_numbers[proj_nr]);
2017                                         env->entries[idx]->high_word =
2018                                                 new_rd_Proj(dbg, results, mode, res_numbers[proj_nr] + 1);
2019                                 }  /* if */
2020                                 mark_irn_visited(proj);
2021                         }  /* if */
2022                 }  /* for */
2023                 set_optimize(rem);
2024         }
2025 }  /* lower_Call */
2026
2027 /**
2028  * Translate an Unknown into two.
2029  */
2030 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env)
2031 {
2032         int      idx = get_irn_idx(node);
2033         ir_graph *irg = get_irn_irg(node);
2034         ir_mode  *low_mode = env->params->low_unsigned;
2035
2036         env->entries[idx]->low_word  = new_r_Unknown(irg, low_mode);
2037         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2038 }  /* lower_Unknown */
2039
2040 /**
2041  * Translate a Phi.
2042  *
2043  * First step: just create two templates
2044  */
2045 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env)
2046 {
2047         ir_mode  *mode_l = env->params->low_unsigned;
2048         ir_graph *irg = get_irn_irg(phi);
2049         ir_node  *block, *unk_l, *unk_h, *phi_l, *phi_h;
2050         ir_node  **inl, **inh;
2051         dbg_info *dbg;
2052         int      idx, i, arity = get_Phi_n_preds(phi);
2053         int      enq = 0;
2054
2055         idx = get_irn_idx(phi);
2056         if (env->entries[idx]->low_word) {
2057                 /* Phi nodes already build, check for inputs */
2058                 ir_node *phil = env->entries[idx]->low_word;
2059                 ir_node *phih = env->entries[idx]->high_word;
2060
2061                 for (i = 0; i < arity; ++i) {
2062                         ir_node *pred = get_Phi_pred(phi, i);
2063                         int     idx = get_irn_idx(pred);
2064
2065                         if (env->entries[idx]->low_word) {
2066                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2067                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2068                         } else {
2069                                 /* still not ready */
2070                                 pdeq_putr(env->waitq, phi);
2071                                 return;
2072                         }  /* if */
2073                 }  /* for */
2074         }  /* if */
2075
2076         /* first create a new in array */
2077         NEW_ARR_A(ir_node *, inl, arity);
2078         NEW_ARR_A(ir_node *, inh, arity);
2079         unk_l = new_r_Unknown(irg, mode_l);
2080         unk_h = new_r_Unknown(irg, mode);
2081
2082         for (i = 0; i < arity; ++i) {
2083                 ir_node *pred = get_Phi_pred(phi, i);
2084                 int     idx = get_irn_idx(pred);
2085
2086                 if (env->entries[idx]->low_word) {
2087                         inl[i] = env->entries[idx]->low_word;
2088                         inh[i] = env->entries[idx]->high_word;
2089                 } else {
2090                         inl[i] = unk_l;
2091                         inh[i] = unk_h;
2092                         enq = 1;
2093                 }  /* if */
2094         }  /* for */
2095
2096         dbg   = get_irn_dbg_info(phi);
2097         block = get_nodes_block(phi);
2098
2099         idx = get_irn_idx(phi);
2100         assert(idx < env->n_entries);
2101         env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, block, arity, inl, mode_l);
2102         env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, block, arity, inh, mode);
2103
2104         /* Don't forget to link the new Phi nodes into the block.
2105          * Beware that some Phis might be optimized away. */
2106         if (is_Phi(phi_l))
2107                 add_Block_phi(block, phi_l);
2108         if (is_Phi(phi_h))
2109                 add_Block_phi(block, phi_h);
2110
2111         if (enq) {
2112                 /* not yet finished */
2113                 pdeq_putr(env->waitq, phi);
2114         }  /* if */
2115 }  /* lower_Phi */
2116
2117 /**
2118  * Translate a Mux.
2119  */
2120 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env)
2121 {
2122         ir_node  *block, *val;
2123         ir_node  *true_l, *true_h, *false_l, *false_h, *sel;
2124         dbg_info *dbg;
2125         int      idx;
2126
2127         val = get_Mux_true(mux);
2128         idx = get_irn_idx(val);
2129         if (env->entries[idx]->low_word) {
2130                 /* Values already build */
2131                 true_l = env->entries[idx]->low_word;
2132                 true_h = env->entries[idx]->high_word;
2133         } else {
2134                 /* still not ready */
2135                 pdeq_putr(env->waitq, mux);
2136                 return;
2137         }  /* if */
2138
2139         val = get_Mux_false(mux);
2140         idx = get_irn_idx(val);
2141         if (env->entries[idx]->low_word) {
2142                 /* Values already build */
2143                 false_l = env->entries[idx]->low_word;
2144                 false_h = env->entries[idx]->high_word;
2145         } else {
2146                 /* still not ready */
2147                 pdeq_putr(env->waitq, mux);
2148                 return;
2149         }  /* if */
2150
2151
2152         sel = get_Mux_sel(mux);
2153
2154         dbg   = get_irn_dbg_info(mux);
2155         block = get_nodes_block(mux);
2156
2157         idx = get_irn_idx(mux);
2158         assert(idx < env->n_entries);
2159         env->entries[idx]->low_word  = new_rd_Mux(dbg, block, sel, false_l, true_l, mode);
2160         env->entries[idx]->high_word = new_rd_Mux(dbg, block, sel, false_h, true_h, mode);
2161 }  /* lower_Mux */
2162
2163 /**
2164  * Translate an ASM node.
2165  */
2166 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env)
2167 {
2168         ir_mode *his = env->params->high_signed;
2169         ir_mode *hiu = env->params->high_unsigned;
2170         int      i;
2171         ir_node *n;
2172
2173         (void)mode;
2174
2175         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2176                 ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
2177                 if (op_mode == his || op_mode == hiu) {
2178                         panic("lowering ASM unimplemented");
2179                 }  /* if */
2180         }  /* for */
2181
2182         for (n = asmn;;) {
2183                 ir_mode *proj_mode;
2184
2185                 n = get_irn_link(n);
2186                 if (n == NULL)
2187                         break;
2188
2189                 proj_mode = get_irn_mode(n);
2190                 if (proj_mode == his || proj_mode == hiu) {
2191                         panic("lowering ASM unimplemented");
2192                 }  /* if */
2193         }  /* for */
2194 }  /* lower_ASM */
2195
2196 /**
2197  * Translate a Sel node.
2198  */
2199 static void lower_Sel(ir_node *sel, ir_mode *mode, lower_env_t *env)
2200 {
2201         (void) mode;
2202
2203         /* we must only lower value parameter Sels if we change the
2204            value parameter type. */
2205         if (env->value_param_tp != NULL) {
2206                 ir_entity *ent = get_Sel_entity(sel);
2207             if (get_entity_owner(ent) == env->value_param_tp) {
2208                         int pos = PTR_TO_INT(get_entity_link(ent));
2209
2210                         ent = get_method_value_param_ent(env->l_mtp, pos);
2211                         set_Sel_entity(sel, ent);
2212                 }  /* if */
2213         }  /* if */
2214 }  /* lower_Sel */
2215
2216 /**
2217  * check for opcodes that must always be lowered.
2218  */
2219 static int always_lower(ir_opcode code)
2220 {
2221         switch (code) {
2222         case iro_ASM:
2223         case iro_Proj:
2224         case iro_Start:
2225         case iro_Call:
2226         case iro_Return:
2227         case iro_Cond:
2228         case iro_Conv:
2229         case iro_Sel:
2230                 return 1;
2231         default:
2232                 return 0;
2233         }  /* switch */
2234 }  /* always_lower */
2235
2236 /**
2237  * lower boolean Proj(Cmp)
2238  */
2239 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env)
2240 {
2241         int      lidx, ridx;
2242         ir_node  *l, *r, *low, *high, *t, *res;
2243         pn_Cmp   pnc;
2244         ir_node  *blk;
2245         dbg_info *db;
2246
2247         l    = get_Cmp_left(cmp);
2248         lidx = get_irn_idx(l);
2249         if (! env->entries[lidx]->low_word) {
2250                 /* still not ready */
2251                 return NULL;
2252         }  /* if */
2253
2254         r    = get_Cmp_right(cmp);
2255         ridx = get_irn_idx(r);
2256         if (! env->entries[ridx]->low_word) {
2257                 /* still not ready */
2258                 return NULL;
2259         }  /* if */
2260
2261         pnc  = get_Proj_proj(proj);
2262         blk  = get_nodes_block(cmp);
2263         db   = get_irn_dbg_info(cmp);
2264         low  = new_rd_Cmp(db, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2265         high = new_rd_Cmp(db, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2266
2267         if (pnc == pn_Cmp_Eq) {
2268                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2269                 res = new_rd_And(db, blk,
2270                         new_r_Proj(low, mode_b, pnc),
2271                         new_r_Proj(high, mode_b, pnc),
2272                         mode_b);
2273         } else if (pnc == pn_Cmp_Lg) {
2274                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2275                 res = new_rd_Or(db, blk,
2276                         new_r_Proj(low, mode_b, pnc),
2277                         new_r_Proj(high, mode_b, pnc),
2278                         mode_b);
2279         } else {
2280                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2281                 t = new_rd_And(db, blk,
2282                         new_r_Proj(low, mode_b, pnc),
2283                         new_r_Proj(high, mode_b, pn_Cmp_Eq),
2284                         mode_b);
2285                 res = new_rd_Or(db, blk,
2286                         new_r_Proj(high, mode_b, pnc & ~pn_Cmp_Eq),
2287                         t,
2288                         mode_b);
2289         }  /* if */
2290         return res;
2291 }  /* lower_boolean_Proj_Cmp */
2292
2293 /**
2294  * The type of a lower function.
2295  *
2296  * @param node   the node to be lowered
2297  * @param mode   the low mode for the destination node
2298  * @param env    the lower environment
2299  */
2300 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2301
2302 /**
2303  * Lower a node.
2304  */
2305 static void lower_ops(ir_node *node, void *env)
2306 {
2307         lower_env_t  *lenv = env;
2308         node_entry_t *entry;
2309         int          idx = get_irn_idx(node);
2310         ir_mode      *mode = get_irn_mode(node);
2311
2312         if (mode == mode_b || is_Mux(node) || is_Conv(node)) {
2313                 int i;
2314
2315                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2316                         ir_node *proj = get_irn_n(node, i);
2317
2318                         if (is_Proj(proj)) {
2319                                 ir_node *cmp = get_Proj_pred(proj);
2320
2321                                 if (is_Cmp(cmp)) {
2322                                         ir_node *arg = get_Cmp_left(cmp);
2323
2324                                         mode = get_irn_mode(arg);
2325                                         if (mode == lenv->params->high_signed ||
2326                                                 mode == lenv->params->high_unsigned) {
2327                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2328
2329                                                 if (res == NULL) {
2330                                                         /* could not lower because predecessors not ready */
2331                                                         waitq_put(lenv->waitq, node);
2332                                                         return;
2333                                                 }  /* if */
2334                                                 set_irn_n(node, i, res);
2335                                         }  /* if */
2336                                 }  /* if */
2337                         }  /* if */
2338                 }  /* for */
2339         }  /* if */
2340
2341         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2342         if (entry || always_lower(get_irn_opcode(node))) {
2343                 ir_op      *op = get_irn_op(node);
2344                 lower_func func = (lower_func)op->ops.generic;
2345
2346                 if (func) {
2347                         mode = get_irn_op_mode(node);
2348
2349                         if (mode == lenv->params->high_signed)
2350                                 mode = lenv->params->low_signed;
2351                         else
2352                                 mode = lenv->params->low_unsigned;
2353
2354                         DB((dbg, LEVEL_1, "  %+F\n", node));
2355                         func(node, mode, lenv);
2356                 }  /* if */
2357         }  /* if */
2358 }  /* lower_ops */
2359
2360 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2361
2362 /**
2363  * Compare two op_mode_entry_t's.
2364  */
2365 static int cmp_op_mode(const void *elt, const void *key, size_t size)
2366 {
2367         const op_mode_entry_t *e1 = elt;
2368         const op_mode_entry_t *e2 = key;
2369         (void) size;
2370
2371         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2372 }  /* cmp_op_mode */
2373
2374 /**
2375  * Compare two conv_tp_entry_t's.
2376  */
2377 static int cmp_conv_tp(const void *elt, const void *key, size_t size)
2378 {
2379         const conv_tp_entry_t *e1 = elt;
2380         const conv_tp_entry_t *e2 = key;
2381         (void) size;
2382
2383         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2384 }  /* cmp_conv_tp */
2385
2386 /**
2387  * Enter a lowering function into an ir_op.
2388  */
2389 static void enter_lower_func(ir_op *op, lower_func func)
2390 {
2391         op->ops.generic = (op_func)func;
2392 }  /* enter_lower_func */
2393
2394 /**
2395  * Returns non-zero if a method type must be lowered.
2396  *
2397  * @param mtp  the method type
2398  */
2399 static int mtp_must_to_lowered(ir_type *mtp, lower_env_t *env)
2400 {
2401         int i, n_params;
2402
2403         n_params = get_method_n_params(mtp);
2404         if (n_params <= 0)
2405                 return 0;
2406
2407         /* first check if we have parameters that must be fixed */
2408         for (i = 0; i < n_params; ++i) {
2409                 ir_type *tp = get_method_param_type(mtp, i);
2410
2411                 if (is_Primitive_type(tp)) {
2412                         ir_mode *mode = get_type_mode(tp);
2413
2414                         if (mode == env->params->high_signed ||
2415                                 mode == env->params->high_unsigned)
2416                                 return 1;
2417                 }  /* if */
2418         }  /* for */
2419         return 0;
2420 }  /* mtp_must_to_lowered */
2421
2422 /*
2423  * Do the lowering.
2424  */
2425 void lower_dw_ops(const lwrdw_param_t *param)
2426 {
2427         lower_env_t lenv;
2428         int         i;
2429         ir_graph    *rem;
2430
2431         if (! param)
2432                 return;
2433
2434         if (! param->enable)
2435                 return;
2436
2437         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2438
2439         assert(2 * get_mode_size_bits(param->low_signed)   == get_mode_size_bits(param->high_signed));
2440         assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
2441         assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
2442
2443         /* create the necessary maps */
2444         if (! intrinsic_fkt)
2445                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2446         if (! conv_types)
2447                 conv_types = new_set(cmp_conv_tp, 16);
2448         if (! lowered_type)
2449                 lowered_type = pmap_create();
2450
2451         /* create a primitive unsigned and signed type */
2452         if (! tp_u)
2453                 tp_u = get_type_for_mode(param->low_unsigned);
2454         if (! tp_s)
2455                 tp_s = get_type_for_mode(param->low_signed);
2456
2457         /* create method types for the created binop calls */
2458         if (! binop_tp_u) {
2459                 binop_tp_u = new_type_method(4, 2);
2460                 set_method_param_type(binop_tp_u, 0, tp_u);
2461                 set_method_param_type(binop_tp_u, 1, tp_u);
2462                 set_method_param_type(binop_tp_u, 2, tp_u);
2463                 set_method_param_type(binop_tp_u, 3, tp_u);
2464                 set_method_res_type(binop_tp_u, 0, tp_u);
2465                 set_method_res_type(binop_tp_u, 1, tp_u);
2466         }  /* if */
2467         if (! binop_tp_s) {
2468                 binop_tp_s = new_type_method(4, 2);
2469                 set_method_param_type(binop_tp_s, 0, tp_u);
2470                 set_method_param_type(binop_tp_s, 1, tp_s);
2471                 set_method_param_type(binop_tp_s, 2, tp_u);
2472                 set_method_param_type(binop_tp_s, 3, tp_s);
2473                 set_method_res_type(binop_tp_s, 0, tp_u);
2474                 set_method_res_type(binop_tp_s, 1, tp_s);
2475         }  /* if */
2476         if (! shiftop_tp_u) {
2477                 shiftop_tp_u = new_type_method(3, 2);
2478                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2479                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2480                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2481                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2482                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2483         }  /* if */
2484         if (! shiftop_tp_s) {
2485                 shiftop_tp_s = new_type_method(3, 2);
2486                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2487                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2488                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2489                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2490                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2491         }  /* if */
2492         if (! unop_tp_u) {
2493                 unop_tp_u = new_type_method(2, 2);
2494                 set_method_param_type(unop_tp_u, 0, tp_u);
2495                 set_method_param_type(unop_tp_u, 1, tp_u);
2496                 set_method_res_type(unop_tp_u, 0, tp_u);
2497                 set_method_res_type(unop_tp_u, 1, tp_u);
2498         }  /* if */
2499         if (! unop_tp_s) {
2500                 unop_tp_s = new_type_method(2, 2);
2501                 set_method_param_type(unop_tp_s, 0, tp_u);
2502                 set_method_param_type(unop_tp_s, 1, tp_s);
2503                 set_method_res_type(unop_tp_s, 0, tp_u);
2504                 set_method_res_type(unop_tp_s, 1, tp_s);
2505         }  /* if */
2506
2507         lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), param->low_unsigned);
2508         lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), param->low_unsigned);
2509         lenv.waitq         = new_pdeq();
2510         lenv.params        = param;
2511         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
2512         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
2513
2514         /* first clear the generic function pointer for all ops */
2515         clear_irp_opcodes_generic_func();
2516
2517 #define LOWER2(op, fkt)   enter_lower_func(op_##op, fkt)
2518 #define LOWER(op)         LOWER2(op, lower_##op)
2519 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2520 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2521
2522         /* the table of all operations that must be lowered follows */
2523         LOWER(ASM);
2524         LOWER(Load);
2525         LOWER(Store);
2526         LOWER(Const);
2527         LOWER(And);
2528         LOWER(Or);
2529         LOWER(Eor);
2530         LOWER(Not);
2531         LOWER(Cond);
2532         LOWER(Return);
2533         LOWER(Call);
2534         LOWER(Unknown);
2535         LOWER(Phi);
2536         LOWER(Mux);
2537         LOWER(Start);
2538
2539         LOWER_BIN(Add);
2540         LOWER_BIN(Sub);
2541         LOWER_BIN(Mul);
2542         LOWER(Shl);
2543         LOWER(Shr);
2544         LOWER(Shrs);
2545         LOWER(Rotl);
2546         LOWER(DivMod);
2547         LOWER(Div);
2548         LOWER(Mod);
2549         LOWER(Sel);
2550         LOWER_UN(Abs);
2551         LOWER_UN(Minus);
2552
2553         LOWER(Conv);
2554
2555 #undef LOWER_UN
2556 #undef LOWER_BIN
2557 #undef LOWER
2558 #undef LOWER2
2559
2560         /* transform all graphs */
2561         rem = current_ir_graph;
2562         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2563                 ir_graph  *irg = get_irp_irg(i);
2564                 ir_entity *ent;
2565                 ir_type   *mtp;
2566                 int n_idx;
2567
2568                 obstack_init(&lenv.obst);
2569
2570                 n_idx = get_irg_last_idx(irg);
2571                 n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2572                 lenv.n_entries = n_idx;
2573                 lenv.entries   = NEW_ARR_F(node_entry_t *, n_idx);
2574                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2575
2576                 lenv.l_mtp        = NULL;
2577                 lenv.flags        = 0;
2578                 lenv.proj_2_block = pmap_create();
2579                 lenv.value_param_tp = NULL;
2580                 ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2581
2582                 ent = get_irg_entity(irg);
2583                 mtp = get_entity_type(ent);
2584
2585                 if (mtp_must_to_lowered(mtp, &lenv)) {
2586                         ir_type *ltp = lower_mtp(mtp, &lenv);
2587                         lenv.flags |= MUST_BE_LOWERED;
2588                         set_entity_type(ent, ltp);
2589                         lenv.l_mtp = ltp;
2590                         lenv.value_param_tp = get_method_value_param_type(mtp);
2591                 }  /* if */
2592
2593                 /* first step: link all nodes and allocate data */
2594                 irg_walk_graph(irg, firm_clear_node_and_phi_links, prepare_links_and_handle_rotl, &lenv);
2595
2596                 if (lenv.flags & MUST_BE_LOWERED) {
2597                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2598
2599                         /* must do some work */
2600                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2601
2602                         /* last step: all waiting nodes */
2603                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2604                         current_ir_graph = irg;
2605                         while (! pdeq_empty(lenv.waitq)) {
2606                                 ir_node *node = pdeq_getl(lenv.waitq);
2607
2608                                 lower_ops(node, &lenv);
2609                         }  /* while */
2610
2611                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2612
2613                         /* outs are invalid, we changed the graph */
2614                         set_irg_outs_inconsistent(irg);
2615
2616                         if (lenv.flags & CF_CHANGED) {
2617                                 /* control flow changed, dominance info is invalid */
2618                                 set_irg_doms_inconsistent(irg);
2619                                 set_irg_extblk_inconsistent(irg);
2620                                 set_irg_loopinfo_inconsistent(irg);
2621                         }  /* if */
2622                 } else {
2623                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2624                 }  /* if */
2625                 pmap_destroy(lenv.proj_2_block);
2626                 DEL_ARR_F(lenv.entries);
2627                 obstack_free(&lenv.obst, NULL);
2628         }  /* for */
2629         del_pdeq(lenv.waitq);
2630         current_ir_graph = rem;
2631 }  /* lower_dw_ops */
2632
2633 struct pass_t {
2634         ir_prog_pass_t      pass;
2635         const lwrdw_param_t *param;
2636 };
2637
2638 /**
2639  * Creates a wrapper around lower_dw_ops().
2640  */
2641 static int pass_wrapper(ir_prog *irp, void *context)
2642 {
2643         struct pass_t *pass = context;
2644
2645         (void)irp;
2646         lower_dw_ops(pass->param);
2647         return 0;
2648 }
2649
2650 ir_prog_pass_t *lower_dw_ops_pass(const char *name, const lwrdw_param_t *param)
2651 {
2652         struct pass_t *pass = XMALLOCZ(struct pass_t);
2653
2654         pass->param = param;
2655         return def_prog_pass_constructor(
2656                 &pass->pass, name ? name : "lower_dw", pass_wrapper);
2657 }  /* lower_dw_ops_pass */
2658
2659 /* Default implementation. */
2660 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2661                                     const ir_mode *imode, const ir_mode *omode,
2662                                     void *context)
2663 {
2664         char buf[64];
2665         ident *id;
2666         ir_entity *ent;
2667         (void) context;
2668
2669         if (imode == omode) {
2670                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2671         } else {
2672                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2673                         get_mode_name(imode), get_mode_name(omode));
2674         }  /* if */
2675         id = new_id_from_str(buf);
2676
2677         ent = new_entity(get_glob_type(), id, method);
2678         set_entity_ld_ident(ent, get_entity_ident(ent));
2679         return ent;
2680 }  /* def_create_intrinsic_fkt */