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         ir_graph      *irg;
 111         struct obstack obst;          /**< an obstack holding the temporary data */
 112         ir_type  *l_mtp;              /**< lowered method type of the current method */
 113         tarval   *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 114         tarval   *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 115         pdeq     *waitq;              /**< a wait queue of all nodes that must be handled later */
 116         pmap     *proj_2_block;       /**< a map from ProjX to its destination blocks */
 117         ir_mode  *high_signed;        /**< doubleword signed type */
 118         ir_mode  *high_unsigned;      /**< doubleword unsigned type */
 119         ir_mode  *low_signed;         /**< word signed type */
 120         ir_mode  *low_unsigned;       /**< word unsigned type */
 121         ident    *first_id;           /**< .l for little and .h for big endian */
 122         ident    *next_id;            /**< .h for little and .l for big endian */
 123         const lwrdw_param_t *params;  /**< transformation parameter */
 124         unsigned flags;               /**< some flags */
 125         unsigned n_entries;           /**< number of entries */
 126         ir_type  *value_param_tp;     /**< the old value param type */
 127 } lower_env_t;
 128
 129 /**
 130  * Create a method type for a Conv emulation from imode to omode.
 131  */
 132 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env)
 133 {
 134         conv_tp_entry_t key, *entry;
 135         ir_type *mtd;
 136
 137         key.imode = imode;
 138         key.omode = omode;
 139         key.mtd   = NULL;
 140
 141         entry = set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 142         if (! entry->mtd) {
 143                 int n_param = 1, n_res = 1;
 144
 145                 if (imode == env->high_signed || imode == env->high_unsigned)
 146                         n_param = 2;
 147                 if (omode == env->high_signed || omode == env->high_unsigned)
 148                         n_res = 2;
 149
 150                 /* create a new one */
 151                 mtd = new_type_method(n_param, n_res);
 152
 153                 /* set param types and result types */
 154                 n_param = 0;
 155                 if (imode == env->high_signed) {
 156                         set_method_param_type(mtd, n_param++, tp_u);
 157                         set_method_param_type(mtd, n_param++, tp_s);
 158                 } else if (imode == env->high_unsigned) {
 159                         set_method_param_type(mtd, n_param++, tp_u);
 160                         set_method_param_type(mtd, n_param++, tp_u);
 161                 } else {
 162                         ir_type *tp = get_type_for_mode(imode);
 163                         set_method_param_type(mtd, n_param++, tp);
 164                 }
 165
 166                 n_res = 0;
 167                 if (omode == env->high_signed) {
 168                         set_method_res_type(mtd, n_res++, tp_u);
 169                         set_method_res_type(mtd, n_res++, tp_s);
 170                 } else if (omode == env->high_unsigned) {
 171                         set_method_res_type(mtd, n_res++, tp_u);
 172                         set_method_res_type(mtd, n_res++, tp_u);
 173                 } else {
 174                         ir_type *tp = get_type_for_mode(omode);
 175                         set_method_res_type(mtd, n_res++, tp);
 176                 }
 177                 entry->mtd = mtd;
 178         } else {
 179                 mtd = entry->mtd;
 180         }
 181         return mtd;
 182 }
 183
 184 /**
 185  * Add an additional control flow input to a block.
 186  * Patch all Phi nodes. The new Phi inputs are copied from
 187  * old input number nr.
 188  */
 189 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 190 {
 191         int i, arity = get_irn_arity(block);
 192         ir_node **in, *phi;
 193
 194         assert(nr < arity);
 195
 196         NEW_ARR_A(ir_node *, in, arity + 1);
 197         for (i = 0; i < arity; ++i)
 198                 in[i] = get_irn_n(block, i);
 199         in[i] = cf;
 200
 201         set_irn_in(block, i + 1, in);
 202
 203         for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
 204                 for (i = 0; i < arity; ++i)
 205                         in[i] = get_irn_n(phi, i);
 206                 in[i] = in[nr];
 207                 set_irn_in(phi, i + 1, in);
 208         }
 209 }
 210
 211 /**
 212  * Add an additional control flow input to a block.
 213  * Patch all Phi nodes. The new Phi inputs are copied from
 214  * old input from cf tmpl.
 215  */
 216 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 217 {
 218         int i, arity = get_irn_arity(block);
 219         int nr = 0;
 220
 221         for (i = 0; i < arity; ++i) {
 222                 if (get_irn_n(block, i) == tmpl) {
 223                         nr = i;
 224                         break;
 225                 }
 226         }
 227         assert(i < arity);
 228         add_block_cf_input_nr(block, nr, cf);
 229 }
 230
 231 /**
 232  * Return the "operational" mode of a Firm node.
 233  */
 234 static ir_mode *get_irn_op_mode(ir_node *node)
 235 {
 236         switch (get_irn_opcode(node)) {
 237         case iro_Load:
 238                 return get_Load_mode(node);
 239         case iro_Store:
 240                 return get_irn_mode(get_Store_value(node));
 241         case iro_DivMod:
 242                 return get_irn_mode(get_DivMod_left(node));
 243         case iro_Div:
 244                 return get_irn_mode(get_Div_left(node));
 245         case iro_Mod:
 246                 return get_irn_mode(get_Mod_left(node));
 247         case iro_Cmp:
 248                 return get_irn_mode(get_Cmp_left(node));
 249         default:
 250                 return get_irn_mode(node);
 251         }
 252 }
 253
 254 /**
 255  * Walker, prepare the node links.
 256  */
 257 static void prepare_links(ir_node *node, void *env)
 258 {
 259         lower_env_t  *lenv = env;
 260         ir_mode      *mode = get_irn_op_mode(node);
 261         node_entry_t *link;
 262         int           i;
 263
 264         if (mode == lenv->high_signed || mode == lenv->high_unsigned) {
 265                 unsigned idx = get_irn_idx(node);
 266                 /* ok, found a node that will be lowered */
 267                 link = OALLOCZ(&lenv->obst, node_entry_t);
 268
 269                 idx = get_irn_idx(node);
 270                 if (idx >= lenv->n_entries) {
 271                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 272                         unsigned old   = lenv->n_entries;
 273                         unsigned n_idx = idx + (idx >> 3);
 274
 275                         ARR_RESIZE(node_entry_t *, lenv->entries, n_idx);
 276                         memset(&lenv->entries[old], 0, (n_idx - old) * sizeof(lenv->entries[0]));
 277                         lenv->n_entries = n_idx;
 278                 }
 279                 lenv->entries[idx] = link;
 280                 lenv->flags |= MUST_BE_LOWERED;
 281         } else if (is_Conv(node)) {
 282                 /* Conv nodes have two modes */
 283                 ir_node *pred = get_Conv_op(node);
 284                 mode = get_irn_mode(pred);
 285
 286                 if (mode == lenv->high_signed ||
 287                         mode == lenv->high_unsigned) {
 288                         /* must lower this node either but don't need a link */
 289                         lenv->flags |= MUST_BE_LOWERED;
 290                 }
 291                 return;
 292         }
 293
 294         if (is_Proj(node)) {
 295                 /* link all Proj nodes to its predecessor:
 296                    Note that Tuple Proj's and its Projs are linked either. */
 297                 ir_node *pred = get_Proj_pred(node);
 298
 299                 set_irn_link(node, get_irn_link(pred));
 300                 set_irn_link(pred, node);
 301         } else if (is_Phi(node)) {
 302                 /* link all Phi nodes to its block */
 303                 ir_node *block = get_nodes_block(node);
 304                 add_Block_phi(block, node);
 305         } else if (is_Block(node)) {
 306                 /* fill the Proj -> Block map */
 307                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 308                         ir_node *pred = get_Block_cfgpred(node, i);
 309
 310                         if (is_Proj(pred))
 311                                 pmap_insert(lenv->proj_2_block, pred, node);
 312                 }
 313         }
 314 }
 315
 316 /**
 317  * Translate a Constant: create two.
 318  */
 319 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env)
 320 {
 321         ir_graph *irg      = get_irn_irg(node);
 322         dbg_info *dbg      = get_irn_dbg_info(node);
 323         ir_mode  *low_mode = env->low_unsigned;
 324         unsigned  idx;
 325         tarval   *tv, *tv_l, *tv_h;
 326         ir_node  *low, *high;
 327
 328         tv   = get_Const_tarval(node);
 329
 330         tv_l = tarval_convert_to(tv, low_mode);
 331         low  = new_rd_Const(dbg, irg, tv_l);
 332
 333         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 334         high = new_rd_Const(dbg, irg, tv_h);
 335
 336         idx = get_irn_idx(node);
 337         assert(idx < env->n_entries);
 338         env->entries[idx]->low_word  = low;
 339         env->entries[idx]->high_word = high;
 340 }
 341
 342 /**
 343  * Translate a Load: create two.
 344  */
 345 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env)
 346 {
 347         ir_mode    *low_mode = env->low_unsigned;
 348         ir_graph   *irg = get_irn_irg(node);
 349         ir_node    *adr = get_Load_ptr(node);
 350         ir_node    *mem = get_Load_mem(node);
 351         ir_node    *low, *high, *proj;
 352         dbg_info   *dbg;
 353         ir_node    *block = get_nodes_block(node);
 354         unsigned    idx;
 355         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 356                                  ? cons_volatile : 0;
 357
 358         if (env->params->little_endian) {
 359                 low  = adr;
 360                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 361         } else {
 362                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 363                 high = adr;
 364         }
 365
 366         /* create two loads */
 367         dbg  = get_irn_dbg_info(node);
 368         low  = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 369         proj = new_r_Proj(low, mode_M, pn_Load_M);
 370         high = new_rd_Load(dbg, block, proj, high, mode, volatility);
 371
 372         idx = get_irn_idx(node);
 373         assert(idx < env->n_entries);
 374         env->entries[idx]->low_word  = low;
 375         env->entries[idx]->high_word = high;
 376
 377         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 378                 idx = get_irn_idx(proj);
 379
 380                 switch (get_Proj_proj(proj)) {
 381                 case pn_Load_M:         /* Memory result. */
 382                         /* put it to the second one */
 383                         set_Proj_pred(proj, high);
 384                         break;
 385                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 386                         /* put it to the first one */
 387                         set_Proj_pred(proj, low);
 388                         break;
 389                 case pn_Load_res:       /* Result of load operation. */
 390                         assert(idx < env->n_entries);
 391                         env->entries[idx]->low_word  = new_r_Proj(low,  low_mode, pn_Load_res);
 392                         env->entries[idx]->high_word = new_r_Proj(high, mode,     pn_Load_res);
 393                         break;
 394                 default:
 395                         assert(0 && "unexpected Proj number");
 396                 }
 397                 /* mark this proj: we have handled it already, otherwise we might fall into
 398                  * out new nodes. */
 399                 mark_irn_visited(proj);
 400         }
 401 }
 402
 403 /**
 404  * Translate a Store: create two.
 405  */
 406 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env)
 407 {
 408         ir_graph     *irg;
 409         ir_node      *block, *adr, *mem;
 410         ir_node      *low, *high, *irn, *proj;
 411         dbg_info     *dbg;
 412         unsigned      idx;
 413         node_entry_t *entry;
 414         ir_cons_flags    volatility = get_Store_volatility(node) == volatility_is_volatile
 415                                    ? cons_volatile : 0;
 416         (void) mode;
 417
 418         irn = get_Store_value(node);
 419         entry = env->entries[get_irn_idx(irn)];
 420         assert(entry);
 421
 422         if (! entry->low_word) {
 423                 /* not ready yet, wait */
 424                 pdeq_putr(env->waitq, node);
 425                 return;
 426         }
 427
 428         irg = get_irn_irg(node);
 429         adr = get_Store_ptr(node);
 430         mem = get_Store_mem(node);
 431         block = get_nodes_block(node);
 432
 433         if (env->params->little_endian) {
 434                 low  = adr;
 435                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 436         } else {
 437                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 438                 high = adr;
 439         }
 440
 441         /* create two Stores */
 442         dbg = get_irn_dbg_info(node);
 443         low  = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 444         proj = new_r_Proj(low, mode_M, pn_Store_M);
 445         high = new_rd_Store(dbg, block, proj, high, entry->high_word, volatility);
 446
 447         idx = get_irn_idx(node);
 448         assert(idx < env->n_entries);
 449         env->entries[idx]->low_word  = low;
 450         env->entries[idx]->high_word = high;
 451
 452         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 453                 idx = get_irn_idx(proj);
 454
 455                 switch (get_Proj_proj(proj)) {
 456                 case pn_Store_M:         /* Memory result. */
 457                         /* put it to the second one */
 458                         set_Proj_pred(proj, high);
 459                         break;
 460                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 461                         /* put it to the first one */
 462                         set_Proj_pred(proj, low);
 463                         break;
 464                 default:
 465                         assert(0 && "unexpected Proj number");
 466                 }
 467                 /* mark this proj: we have handled it already, otherwise we might fall into
 468                  * out new nodes. */
 469                 mark_irn_visited(proj);
 470         }
 471 }
 472
 473 /**
 474  * Return a node containing the address of the intrinsic emulation function.
 475  *
 476  * @param method  the method type of the emulation function
 477  * @param op      the emulated ir_op
 478  * @param imode   the input mode of the emulated opcode
 479  * @param omode   the output mode of the emulated opcode
 480  * @param env     the lower environment
 481  */
 482 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 483                                       ir_mode *imode, ir_mode *omode,
 484                                       lower_env_t *env)
 485 {
 486         symconst_symbol sym;
 487         ir_entity *ent;
 488         op_mode_entry_t key, *entry;
 489
 490         key.op    = op;
 491         key.imode = imode;
 492         key.omode = omode;
 493         key.ent   = NULL;
 494
 495         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 496                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 497         if (! entry->ent) {
 498                 /* create a new one */
 499                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 500
 501                 assert(ent && "Intrinsic creator must return an entity");
 502                 entry->ent = ent;
 503         } else {
 504                 ent = entry->ent;
 505         }
 506         sym.entity_p = ent;
 507         return new_r_SymConst(env->irg, mode_P_code, sym, symconst_addr_ent);
 508 }
 509
 510 /**
 511  * Translate a Div.
 512  *
 513  * Create an intrinsic Call.
 514  */
 515 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env)
 516 {
 517         ir_node  *block, *irn, *call, *proj;
 518         ir_node  *in[4];
 519         ir_mode  *opmode;
 520         dbg_info *dbg;
 521         ir_type  *mtp;
 522         unsigned  idx;
 523         node_entry_t *entry;
 524
 525         irn   = get_Div_left(node);
 526         entry = env->entries[get_irn_idx(irn)];
 527         assert(entry);
 528
 529         if (! entry->low_word) {
 530                 /* not ready yet, wait */
 531                 pdeq_putr(env->waitq, node);
 532                 return;
 533         }
 534
 535         in[0] = entry->low_word;
 536         in[1] = entry->high_word;
 537
 538         irn   = get_Div_right(node);
 539         entry = env->entries[get_irn_idx(irn)];
 540         assert(entry);
 541
 542         if (! entry->low_word) {
 543                 /* not ready yet, wait */
 544                 pdeq_putr(env->waitq, node);
 545                 return;
 546         }
 547
 548         in[2] = entry->low_word;
 549         in[3] = entry->high_word;
 550
 551         dbg   = get_irn_dbg_info(node);
 552         block = get_nodes_block(node);
 553
 554         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 555         opmode = get_irn_op_mode(node);
 556         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 557         call = new_rd_Call(dbg, block, get_Div_mem(node), irn, 4, in, mtp);
 558         set_irn_pinned(call, get_irn_pinned(node));
 559         irn = new_r_Proj(call, mode_T, pn_Call_T_result);
 560
 561         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 562                 switch (get_Proj_proj(proj)) {
 563                 case pn_Div_M:         /* Memory result. */
 564                         /* reroute to the call */
 565                         set_Proj_pred(proj, call);
 566                         set_Proj_proj(proj, pn_Call_M);
 567                         break;
 568                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 569                         /* reroute to the call */
 570                         set_Proj_pred(proj, call);
 571                         set_Proj_proj(proj, pn_Call_X_except);
 572                         break;
 573                 case pn_Div_res:       /* Result of computation. */
 574                         idx = get_irn_idx(proj);
 575                         assert(idx < env->n_entries);
 576                         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 577                         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 578                         break;
 579                 default:
 580                         assert(0 && "unexpected Proj number");
 581                 }
 582                 /* mark this proj: we have handled it already, otherwise we might fall into
 583                  * out new nodes. */
 584                 mark_irn_visited(proj);
 585         }
 586 }
 587
 588 /**
 589  * Translate a Mod.
 590  *
 591  * Create an intrinsic Call.
 592  */
 593 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env)
 594 {
 595         ir_node  *block, *proj, *irn, *call;
 596         ir_node  *in[4];
 597         ir_mode  *opmode;
 598         dbg_info *dbg;
 599         ir_type  *mtp;
 600         unsigned  idx;
 601         node_entry_t *entry;
 602
 603         irn   = get_Mod_left(node);
 604         entry = env->entries[get_irn_idx(irn)];
 605         assert(entry);
 606
 607         if (! entry->low_word) {
 608                 /* not ready yet, wait */
 609                 pdeq_putr(env->waitq, node);
 610                 return;
 611         }
 612
 613         in[0] = entry->low_word;
 614         in[1] = entry->high_word;
 615
 616         irn   = get_Mod_right(node);
 617         entry = env->entries[get_irn_idx(irn)];
 618         assert(entry);
 619
 620         if (! entry->low_word) {
 621                 /* not ready yet, wait */
 622                 pdeq_putr(env->waitq, node);
 623                 return;
 624         }
 625
 626         in[2] = entry->low_word;
 627         in[3] = entry->high_word;
 628
 629         dbg   = get_irn_dbg_info(node);
 630         block = get_nodes_block(node);
 631
 632         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 633         opmode = get_irn_op_mode(node);
 634         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 635         call = new_rd_Call(dbg, block, get_Mod_mem(node), irn, 4, in, mtp);
 636         set_irn_pinned(call, get_irn_pinned(node));
 637         irn = new_r_Proj(call, mode_T, pn_Call_T_result);
 638
 639         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 640                 switch (get_Proj_proj(proj)) {
 641                 case pn_Mod_M:         /* Memory result. */
 642                         /* reroute to the call */
 643                         set_Proj_pred(proj, call);
 644                         set_Proj_proj(proj, pn_Call_M);
 645                         break;
 646                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 647                         /* reroute to the call */
 648                         set_Proj_pred(proj, call);
 649                         set_Proj_proj(proj, pn_Call_X_except);
 650                         break;
 651                 case pn_Mod_res:       /* Result of computation. */
 652                         idx = get_irn_idx(proj);
 653                         assert(idx < env->n_entries);
 654                         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 655                         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 656                         break;
 657                 default:
 658                         assert(0 && "unexpected Proj number");
 659                 }
 660                 /* mark this proj: we have handled it already, otherwise we might fall into
 661                  * out new nodes. */
 662                 mark_irn_visited(proj);
 663         }
 664 }
 665
 666 /**
 667  * Translate a DivMod.
 668  *
 669  * Create two intrinsic Calls.
 670  */
 671 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env)
 672 {
 673         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod;
 674         ir_node  *resDiv = NULL;
 675         ir_node  *resMod = NULL;
 676         ir_node  *in[4];
 677         ir_mode  *opmode;
 678         dbg_info *dbg;
 679         ir_type  *mtp;
 680         unsigned  idx;
 681         node_entry_t *entry;
 682         unsigned flags = 0;
 683
 684         /* check if both results are needed */
 685         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 686                 switch (get_Proj_proj(proj)) {
 687                 case pn_DivMod_res_div: flags |= 1; break;
 688                 case pn_DivMod_res_mod: flags |= 2; break;
 689                 default: break;
 690                 }
 691         }
 692
 693         irn   = get_DivMod_left(node);
 694         entry = env->entries[get_irn_idx(irn)];
 695         assert(entry);
 696
 697         if (! entry->low_word) {
 698                 /* not ready yet, wait */
 699                 pdeq_putr(env->waitq, node);
 700                 return;
 701         }
 702
 703         in[0] = entry->low_word;
 704         in[1] = entry->high_word;
 705
 706         irn   = get_DivMod_right(node);
 707         entry = env->entries[get_irn_idx(irn)];
 708         assert(entry);
 709
 710         if (! entry->low_word) {
 711                 /* not ready yet, wait */
 712                 pdeq_putr(env->waitq, node);
 713                 return;
 714         }
 715
 716         in[2] = entry->low_word;
 717         in[3] = entry->high_word;
 718
 719         dbg   = get_irn_dbg_info(node);
 720         block = get_nodes_block(node);
 721
 722         mem = get_DivMod_mem(node);
 723
 724         callDiv = callMod = NULL;
 725         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 726         if (flags & 1) {
 727                 opmode = get_irn_op_mode(node);
 728                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, env);
 729                 callDiv = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 730                 set_irn_pinned(callDiv, get_irn_pinned(node));
 731                 resDiv = new_r_Proj(callDiv, mode_T, pn_Call_T_result);
 732         }
 733         if (flags & 2) {
 734                 if (flags & 1)
 735                         mem = new_r_Proj(callDiv, mode_M, pn_Call_M);
 736                 opmode = get_irn_op_mode(node);
 737                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, env);
 738                 callMod = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 739                 set_irn_pinned(callMod, get_irn_pinned(node));
 740                 resMod = new_r_Proj(callMod, mode_T, pn_Call_T_result);
 741         }
 742
 743         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 744                 switch (get_Proj_proj(proj)) {
 745                 case pn_DivMod_M:         /* Memory result. */
 746                         /* reroute to the first call */
 747                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 748                         set_Proj_proj(proj, pn_Call_M);
 749                         break;
 750                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 751                         /* reroute to the first call */
 752                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 753                         set_Proj_proj(proj, pn_Call_X_except);
 754                         break;
 755                 case pn_DivMod_res_div:   /* Result of Div. */
 756                         idx = get_irn_idx(proj);
 757                         assert(idx < env->n_entries);
 758                         env->entries[idx]->low_word  = new_r_Proj(resDiv, env->low_unsigned, 0);
 759                         env->entries[idx]->high_word = new_r_Proj(resDiv, mode,                      1);
 760                         break;
 761                 case pn_DivMod_res_mod:   /* Result of Mod. */
 762                         idx = get_irn_idx(proj);
 763                         env->entries[idx]->low_word  = new_r_Proj(resMod, env->low_unsigned, 0);
 764                         env->entries[idx]->high_word = new_r_Proj(resMod, mode,                      1);
 765                         break;
 766                 default:
 767                         assert(0 && "unexpected Proj number");
 768                 }
 769                 /* mark this proj: we have handled it already, otherwise we might fall into
 770                  * out new nodes. */
 771                 mark_irn_visited(proj);
 772         }
 773 }
 774
 775 /**
 776  * Translate a Binop.
 777  *
 778  * Create an intrinsic Call.
 779  */
 780 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env)
 781 {
 782         ir_node  *block, *irn;
 783         ir_node  *in[4];
 784         dbg_info *dbg;
 785         ir_type  *mtp;
 786         unsigned  idx;
 787         ir_graph *irg;
 788         node_entry_t *entry;
 789
 790         irn   = get_binop_left(node);
 791         entry = env->entries[get_irn_idx(irn)];
 792         assert(entry);
 793
 794         if (! entry->low_word) {
 795                 /* not ready yet, wait */
 796                 pdeq_putr(env->waitq, node);
 797                 return;
 798         }
 799
 800         in[0] = entry->low_word;
 801         in[1] = entry->high_word;
 802
 803         irn   = get_binop_right(node);
 804         entry = env->entries[get_irn_idx(irn)];
 805         assert(entry);
 806
 807         if (! entry->low_word) {
 808                 /* not ready yet, wait */
 809                 pdeq_putr(env->waitq, node);
 810                 return;
 811         }
 812
 813         in[2] = entry->low_word;
 814         in[3] = entry->high_word;
 815
 816         dbg   = get_irn_dbg_info(node);
 817         block = get_nodes_block(node);
 818         irg   = get_irn_irg(block);
 819
 820         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 821         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 822         irn = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 4, in, mtp);
 823         set_irn_pinned(irn, get_irn_pinned(node));
 824         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
 825
 826         idx = get_irn_idx(node);
 827         assert(idx < env->n_entries);
 828         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 829         env->entries[idx]->high_word = new_r_Proj(irn, mode,              1);
 830 }
 831
 832 /**
 833  * Translate a Shiftop.
 834  *
 835  * Create an intrinsic Call.
 836  */
 837 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env)
 838 {
 839         ir_node  *block, *irn;
 840         ir_node  *in[3];
 841         dbg_info *dbg;
 842         ir_type  *mtp;
 843         unsigned  idx;
 844         ir_graph *irg;
 845         node_entry_t *entry;
 846
 847         irn   = get_binop_left(node);
 848         entry = env->entries[get_irn_idx(irn)];
 849         assert(entry);
 850
 851         if (! entry->low_word) {
 852                 /* not ready yet, wait */
 853                 pdeq_putr(env->waitq, node);
 854                 return;
 855         }
 856
 857         in[0] = entry->low_word;
 858         in[1] = entry->high_word;
 859
 860         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 861         in[2] = get_binop_right(node);
 862         assert(get_irn_mode(in[2]) != env->high_signed
 863                         && get_irn_mode(in[2]) != env->high_unsigned);
 864
 865         dbg   = get_irn_dbg_info(node);
 866         block = get_nodes_block(node);
 867         irg   = get_irn_irg(block);
 868
 869         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 870         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 871         irn = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 3, in, mtp);
 872         set_irn_pinned(irn, get_irn_pinned(node));
 873         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
 874
 875         idx = get_irn_idx(node);
 876         assert(idx < env->n_entries);
 877         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 878         env->entries[idx]->high_word = new_r_Proj(irn, mode,              1);
 879 }
 880
 881 /**
 882  * Translate a Shr and handle special cases.
 883  */
 884 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env)
 885 {
 886         ir_graph *irg   = get_irn_irg(node);
 887         ir_node  *right = get_Shr_right(node);
 888
 889         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 890                 tarval *tv = get_Const_tarval(right);
 891
 892                 if (tarval_is_long(tv) &&
 893                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 894                         ir_node *block        = get_nodes_block(node);
 895                         ir_node *left         = get_Shr_left(node);
 896                         ir_mode *low_unsigned = env->low_unsigned;
 897                         ir_node *c;
 898                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 899                         unsigned idx = get_irn_idx(left);
 900
 901                         left = env->entries[idx]->high_word;
 902                         if (left == NULL) {
 903                                 /* not ready yet, wait */
 904                                 pdeq_putr(env->waitq, node);
 905                                 return;
 906                         }
 907
 908                         idx = get_irn_idx(node);
 909                         /* convert high word into low_unsigned mode if necessary */
 910                         if (get_irn_mode(left) != low_unsigned)
 911                                 left = new_r_Conv(block, left, low_unsigned);
 912
 913                         if (shf_cnt > 0) {
 914                                 c = new_r_Const_long(irg, low_unsigned, shf_cnt);
 915                                 env->entries[idx]->low_word = new_r_Shr(block, left, c,
 916                                                                         low_unsigned);
 917                         } else {
 918                                 env->entries[idx]->low_word = left;
 919                         }
 920                         env->entries[idx]->high_word = new_r_Const(irg, get_mode_null(mode));
 921
 922                         return;
 923                 }
 924         }
 925         lower_Shiftop(node, mode, env);
 926 }
 927
 928 /**
 929  * Translate a Shl and handle special cases.
 930  */
 931 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env)
 932 {
 933         ir_graph *irg   = get_irn_irg(node);
 934         ir_node  *right = get_Shl_right(node);
 935
 936         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 937                 tarval *tv = get_Const_tarval(right);
 938
 939                 if (tarval_is_long(tv) &&
 940                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 941                         ir_mode *mode_l;
 942                         ir_node *block = get_nodes_block(node);
 943                         ir_node *left = get_Shl_left(node);
 944                         ir_node *c;
 945                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 946                         unsigned idx = get_irn_idx(left);
 947
 948                         left = env->entries[idx]->low_word;
 949                         if (left == NULL) {
 950                                 /* not ready yet, wait */
 951                                 pdeq_putr(env->waitq, node);
 952                                 return;
 953                         }
 954
 955                         left = new_r_Conv(block, left, mode);
 956                         idx = get_irn_idx(node);
 957
 958                         mode_l = env->low_unsigned;
 959                         if (shf_cnt > 0) {
 960                                 c = new_r_Const_long(irg, mode_l, shf_cnt);
 961                                 env->entries[idx]->high_word = new_r_Shl(block, left, c, mode);
 962                         } else {
 963                                 env->entries[idx]->high_word = left;
 964                         }
 965                         env->entries[idx]->low_word  = new_r_Const(irg, get_mode_null(mode_l));
 966
 967                         return;
 968                 }
 969         }
 970         lower_Shiftop(node, mode, env);
 971 }
 972
 973 /**
 974  * Translate a Shrs and handle special cases.
 975  */
 976 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env)
 977 {
 978         ir_graph *irg   = get_irn_irg(node);
 979         ir_node  *right = get_Shrs_right(node);
 980
 981         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 982                 tarval *tv = get_Const_tarval(right);
 983
 984                 if (tarval_is_long(tv) &&
 985                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 986                         ir_node *block         = get_nodes_block(node);
 987                         ir_node *left          = get_Shrs_left(node);
 988                         ir_mode *low_unsigned  = env->low_unsigned;
 989                         long     shf_cnt       = get_tarval_long(tv) - get_mode_size_bits(mode);
 990                         unsigned idx           = get_irn_idx(left);
 991                         ir_node *left_unsigned = left;
 992                         ir_node *low;
 993                         ir_node *c;
 994
 995                         left = env->entries[idx]->high_word;
 996                         if (left == NULL) {
 997                                 /* not ready yet, wait */
 998                                 pdeq_putr(env->waitq, node);
 999                                 return;
1000                         }
1001
1002                         idx = get_irn_idx(node);
1003                         /* convert high word into low_unsigned mode if necessary */
1004                         if (get_irn_mode(left_unsigned) != low_unsigned)
1005                                 left_unsigned = new_r_Conv(block, left, low_unsigned);
1006
1007                         if (shf_cnt > 0) {
1008                                 c   = new_r_Const_long(irg, low_unsigned, shf_cnt);
1009                                 low = new_r_Shrs(block, left_unsigned, c, low_unsigned);
1010                         } else {
1011                                 low = left_unsigned;
1012                         }
1013                         /* low word is expected to have low_unsigned */
1014                         env->entries[idx]->low_word = new_r_Conv(block, low, low_unsigned);
1015
1016                         c = new_r_Const_long(irg, low_unsigned,
1017                                              get_mode_size_bits(mode) - 1);
1018                         env->entries[idx]->high_word = new_r_Shrs(block, left, c, mode);
1019
1020                         return;
1021                 }
1022         }
1023         lower_Shiftop(node, mode, env);
1024 }
1025
1026 /**
1027  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1028  */
1029 static void prepare_links_and_handle_rotl(ir_node *node, void *env)
1030 {
1031         lower_env_t *lenv = env;
1032
1033         if (is_Rotl(node)) {
1034                 ir_mode *mode = get_irn_op_mode(node);
1035                         if (mode == lenv->high_signed ||
1036                             mode == lenv->high_unsigned) {
1037                                 ir_node  *right = get_Rotl_right(node);
1038                                 ir_node  *left, *shl, *shr, *or, *block, *sub, *c;
1039                                 ir_mode  *omode, *rmode;
1040                                 ir_graph *irg;
1041                                 dbg_info *dbg;
1042                                 optimization_state_t state;
1043
1044                                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) and lower those */
1045                                 irg   = get_irn_irg(node);
1046                                 dbg   = get_irn_dbg_info(node);
1047                                 omode = get_irn_mode(node);
1048                                 left  = get_Rotl_left(node);
1049                                 block = get_nodes_block(node);
1050                                 shl   = new_rd_Shl(dbg, block, left, right, omode);
1051                                 rmode = get_irn_mode(right);
1052                                 c     = new_r_Const_long(irg, rmode, get_mode_size_bits(omode));
1053                                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
1054                                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
1055
1056                                 /* optimization must be switched off here, or we will get the Rotl back */
1057                                 save_optimization_state(&state);
1058                                 set_opt_algebraic_simplification(0);
1059                                 or = new_rd_Or(dbg, block, shl, shr, omode);
1060                                 restore_optimization_state(&state);
1061
1062                                 exchange(node, or);
1063
1064                                 /* do lowering on the new nodes */
1065                                 prepare_links(shl, env);
1066                                 prepare_links(c, env);
1067                                 prepare_links(sub, env);
1068                                 prepare_links(shr, env);
1069                                 prepare_links(or, env);
1070                         }
1071         } else {
1072                 prepare_links(node, env);
1073         }
1074 }
1075
1076 /**
1077  * Translate an Unop.
1078  *
1079  * Create an intrinsic Call.
1080  */
1081 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env)
1082 {
1083         ir_node  *block, *irn;
1084         ir_node  *in[2];
1085         dbg_info *dbg;
1086         ir_type  *mtp;
1087         ir_graph *irg;
1088         unsigned  idx;
1089         node_entry_t *entry;
1090
1091         irn   = get_unop_op(node);
1092         entry = env->entries[get_irn_idx(irn)];
1093         assert(entry);
1094
1095         if (! entry->low_word) {
1096                 /* not ready yet, wait */
1097                 pdeq_putr(env->waitq, node);
1098                 return;
1099         }
1100
1101         in[0] = entry->low_word;
1102         in[1] = entry->high_word;
1103
1104         dbg   = get_irn_dbg_info(node);
1105         block = get_nodes_block(node);
1106         irg   = get_irn_irg(block);
1107
1108         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1109         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
1110         irn = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1111         set_irn_pinned(irn, get_irn_pinned(node));
1112         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
1113
1114         idx = get_irn_idx(node);
1115         assert(idx < env->n_entries);
1116         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
1117         env->entries[idx]->high_word = new_r_Proj(irn, mode,              1);
1118 }
1119
1120 /**
1121  * Translate a logical Binop.
1122  *
1123  * Create two logical Binops.
1124  */
1125 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1126                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1127         ir_node  *block, *irn;
1128         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1129         dbg_info *dbg;
1130         unsigned  idx;
1131         ir_graph *irg;
1132         node_entry_t *entry;
1133
1134         irn   = get_binop_left(node);
1135         entry = env->entries[get_irn_idx(irn)];
1136         assert(entry);
1137
1138         if (! entry->low_word) {
1139                 /* not ready yet, wait */
1140                 pdeq_putr(env->waitq, node);
1141                 return;
1142         }
1143
1144         lop_l = entry->low_word;
1145         lop_h = entry->high_word;
1146
1147         irn   = get_binop_right(node);
1148         entry = env->entries[get_irn_idx(irn)];
1149         assert(entry);
1150
1151         if (! entry->low_word) {
1152                 /* not ready yet, wait */
1153                 pdeq_putr(env->waitq, node);
1154                 return;
1155         }
1156
1157         rop_l = entry->low_word;
1158         rop_h = entry->high_word;
1159
1160         dbg = get_irn_dbg_info(node);
1161         block = get_nodes_block(node);
1162
1163         idx = get_irn_idx(node);
1164         assert(idx < env->n_entries);
1165         irg = get_irn_irg(node);
1166         env->entries[idx]->low_word  = constr_rd(dbg, block, lop_l, rop_l, env->low_unsigned);
1167         env->entries[idx]->high_word = constr_rd(dbg, block, lop_h, rop_h, mode);
1168 }
1169
1170 /** create a logical operation transformation */
1171 #define lower_logical(op)                                                \
1172 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1173         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1174 }
1175
1176 lower_logical(And)
1177 lower_logical(Or)
1178 lower_logical(Eor)
1179
1180 /**
1181  * Translate a Not.
1182  *
1183  * Create two logical Nots.
1184  */
1185 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env)
1186 {
1187         ir_node  *block, *irn;
1188         ir_node  *op_l, *op_h;
1189         dbg_info *dbg;
1190         unsigned  idx;
1191         node_entry_t *entry;
1192
1193         irn   = get_Not_op(node);
1194         entry = env->entries[get_irn_idx(irn)];
1195         assert(entry);
1196
1197         if (! entry->low_word) {
1198                 /* not ready yet, wait */
1199                 pdeq_putr(env->waitq, node);
1200                 return;
1201         }
1202
1203         op_l = entry->low_word;
1204         op_h = entry->high_word;
1205
1206         dbg   = get_irn_dbg_info(node);
1207         block = get_nodes_block(node);
1208
1209         idx = get_irn_idx(node);
1210         assert(idx < env->n_entries);
1211         env->entries[idx]->low_word  = new_rd_Not(dbg, block, op_l, env->low_unsigned);
1212         env->entries[idx]->high_word = new_rd_Not(dbg, block, op_h, mode);
1213 }
1214
1215 /**
1216  * Translate a Cond.
1217  */
1218 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env)
1219 {
1220         ir_node *cmp, *left, *right, *block;
1221         ir_node *sel = get_Cond_selector(node);
1222         ir_mode *m = get_irn_mode(sel);
1223         unsigned idx;
1224         (void) mode;
1225
1226         if (m == mode_b) {
1227                 node_entry_t *lentry, *rentry;
1228                 ir_node  *proj, *projT = NULL, *projF = NULL;
1229                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1230                 ir_node  *projHF, *projHT;
1231                 ir_node  *dst_blk;
1232                 pn_Cmp   pnc;
1233                 ir_graph *irg;
1234                 dbg_info *dbg;
1235
1236                 if (!is_Proj(sel))
1237                         return;
1238
1239                 cmp   = get_Proj_pred(sel);
1240                 if (!is_Cmp(cmp))
1241                         return;
1242
1243                 left  = get_Cmp_left(cmp);
1244                 idx   = get_irn_idx(left);
1245                 lentry = env->entries[idx];
1246
1247                 if (! lentry) {
1248                         /* a normal Cmp */
1249                         return;
1250                 }
1251
1252                 right = get_Cmp_right(cmp);
1253                 idx   = get_irn_idx(right);
1254                 rentry = env->entries[idx];
1255                 assert(rentry);
1256
1257                 if (! lentry->low_word || !rentry->low_word) {
1258                         /* not yet ready */
1259                         pdeq_putr(env->waitq, node);
1260                         return;
1261                 }
1262
1263                 /* all right, build the code */
1264                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1265                         long proj_nr = get_Proj_proj(proj);
1266
1267                         if (proj_nr == pn_Cond_true) {
1268                                 assert(projT == NULL && "more than one Proj(true)");
1269                                 projT = proj;
1270                         } else {
1271                                 assert(proj_nr == pn_Cond_false);
1272                                 assert(projF == NULL && "more than one Proj(false)");
1273                                 projF = proj;
1274                         }
1275                         mark_irn_visited(proj);
1276                 }
1277                 assert(projT && projF);
1278
1279                 /* create a new high compare */
1280                 block = get_nodes_block(node);
1281                 irg   = get_Block_irg(block);
1282                 dbg   = get_irn_dbg_info(cmp);
1283                 pnc   = get_Proj_proj(sel);
1284
1285                 if (is_Const(right) && is_Const_null(right)) {
1286                         if (pnc == pn_Cmp_Eq || pnc == pn_Cmp_Lg) {
1287                                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1288                                 ir_mode *mode = env->low_unsigned;
1289                                 ir_node *low  = new_r_Conv(block, lentry->low_word, mode);
1290                                 ir_node *high = new_r_Conv(block, lentry->high_word, mode);
1291                                 ir_node *or   = new_rd_Or(dbg, block, low, high, mode);
1292                                 ir_node *cmp  = new_rd_Cmp(dbg, block, or, new_r_Const_long(irg, mode, 0));
1293
1294                                 ir_node *proj = new_r_Proj(cmp, mode_b, pnc);
1295                                 set_Cond_selector(node, proj);
1296                                 return;
1297                         }
1298                 }
1299
1300                 cmpH = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word);
1301
1302                 if (pnc == pn_Cmp_Eq) {
1303                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1304                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1305
1306                         assert(entry);
1307                         dst_blk = entry->value;
1308
1309                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Eq);
1310                         dbg = get_irn_dbg_info(node);
1311                         irn = new_rd_Cond(dbg, block, irn);
1312
1313                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1314                         mark_irn_visited(projHF);
1315                         exchange(projF, projHF);
1316
1317                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1318                         mark_irn_visited(projHT);
1319
1320                         new_bl = new_r_Block(irg, 1, &projHT);
1321
1322                         dbg   = get_irn_dbg_info(cmp);
1323                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1324                         irn = new_r_Proj(cmpL, mode_b, pn_Cmp_Eq);
1325                         dbg = get_irn_dbg_info(node);
1326                         irn = new_rd_Cond(dbg, new_bl, irn);
1327
1328                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1329                         mark_irn_visited(proj);
1330                         add_block_cf_input(dst_blk, projHF, proj);
1331
1332                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1333                         mark_irn_visited(proj);
1334                         exchange(projT, proj);
1335                 } else if (pnc == pn_Cmp_Lg) {
1336                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1337                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1338
1339                         assert(entry);
1340                         dst_blk = entry->value;
1341
1342                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Lg);
1343                         dbg = get_irn_dbg_info(node);
1344                         irn = new_rd_Cond(dbg, block, irn);
1345
1346                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1347                         mark_irn_visited(projHT);
1348                         exchange(projT, projHT);
1349
1350                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1351                         mark_irn_visited(projHF);
1352
1353                         new_bl = new_r_Block(irg, 1, &projHF);
1354
1355                         dbg   = get_irn_dbg_info(cmp);
1356                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1357                         irn = new_r_Proj(cmpL, mode_b, pn_Cmp_Lg);
1358                         dbg = get_irn_dbg_info(node);
1359                         irn = new_rd_Cond(dbg, new_bl, irn);
1360
1361                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1362                         mark_irn_visited(proj);
1363                         add_block_cf_input(dst_blk, projHT, proj);
1364
1365                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1366                         mark_irn_visited(proj);
1367                         exchange(projF, proj);
1368                 } else {
1369                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1370                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1371                         pmap_entry *entry;
1372
1373                         entry = pmap_find(env->proj_2_block, projT);
1374                         assert(entry);
1375                         dstT = entry->value;
1376
1377                         entry = pmap_find(env->proj_2_block, projF);
1378                         assert(entry);
1379                         dstF = entry->value;
1380
1381                         irn = new_r_Proj(cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1382                         dbg = get_irn_dbg_info(node);
1383                         irn = new_rd_Cond(dbg, block, irn);
1384
1385                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1386                         mark_irn_visited(projHT);
1387                         exchange(projT, projHT);
1388                         projT = projHT;
1389
1390                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1391                         mark_irn_visited(projHF);
1392
1393                         newbl_eq = new_r_Block(irg, 1, &projHF);
1394
1395                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Eq);
1396                         irn = new_rd_Cond(dbg, newbl_eq, irn);
1397
1398                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1399                         mark_irn_visited(proj);
1400                         exchange(projF, proj);
1401                         projF = proj;
1402
1403                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1404                         mark_irn_visited(proj);
1405
1406                         newbl_l = new_r_Block(irg, 1, &proj);
1407
1408                         dbg   = get_irn_dbg_info(cmp);
1409                         cmpL = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word);
1410                         irn = new_r_Proj(cmpL, mode_b, pnc);
1411                         dbg = get_irn_dbg_info(node);
1412                         irn = new_rd_Cond(dbg, newbl_l, irn);
1413
1414                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1415                         mark_irn_visited(proj);
1416                         add_block_cf_input(dstT, projT, proj);
1417
1418                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1419                         mark_irn_visited(proj);
1420                         add_block_cf_input(dstF, projF, proj);
1421                 }
1422
1423                 /* we have changed the control flow */
1424                 env->flags |= CF_CHANGED;
1425         } else {
1426                 idx = get_irn_idx(sel);
1427
1428                 if (env->entries[idx]) {
1429                         /*
1430                            Bad, a jump-table with double-word index.
1431                            This should not happen, but if it does we handle
1432                            it like a Conv were between (in other words, ignore
1433                            the high part.
1434                          */
1435
1436                         if (! env->entries[idx]->low_word) {
1437                                 /* not ready yet, wait */
1438                                 pdeq_putr(env->waitq, node);
1439                                 return;
1440                         }
1441                         set_Cond_selector(node, env->entries[idx]->low_word);
1442                 }
1443         }
1444 }
1445
1446 /**
1447  * Translate a Conv to higher_signed
1448  */
1449 static void lower_Conv_to_Ll(ir_node *node, lower_env_t *env)
1450 {
1451         ir_mode  *omode        = get_irn_mode(node);
1452         ir_node  *op           = get_Conv_op(node);
1453         ir_mode  *imode        = get_irn_mode(op);
1454         unsigned  idx          = get_irn_idx(node);
1455         ir_graph *irg          = get_irn_irg(node);
1456         ir_node  *block        = get_nodes_block(node);
1457         dbg_info *dbg          = get_irn_dbg_info(node);
1458         node_entry_t *entry = env->entries[idx];
1459         ir_mode  *low_unsigned = env->low_unsigned;
1460         ir_mode  *low_signed
1461                 = mode_is_signed(omode) ? env->low_signed : low_unsigned;
1462
1463         assert(idx < env->n_entries);
1464
1465         if (mode_is_int(imode) || mode_is_reference(imode)) {
1466                 if (imode == env->high_signed
1467                                 || imode == env->high_unsigned) {
1468                         /* a Conv from Lu to Ls or Ls to Lu */
1469                         unsigned      op_idx   = get_irn_idx(op);
1470                         node_entry_t *op_entry = env->entries[op_idx];
1471
1472                         if (! op_entry->low_word) {
1473                                 /* not ready yet, wait */
1474                                 pdeq_putr(env->waitq, node);
1475                                 return;
1476                         }
1477                         entry->low_word  = op_entry->low_word;
1478                         entry->high_word = new_rd_Conv(dbg, block, op_entry->high_word,
1479                                                        low_signed);
1480                 } else {
1481                         /* simple case: create a high word */
1482                         if (imode != low_unsigned)
1483                                 op = new_rd_Conv(dbg, block, op, low_unsigned);
1484
1485                         entry->low_word = op;
1486
1487                         if (mode_is_signed(imode)) {
1488                                 int      c       = get_mode_size_bits(low_signed) - 1;
1489                                 ir_node *cnst    = new_r_Const_long(irg, low_unsigned, c);
1490                                 if (get_irn_mode(op) != low_signed)
1491                                         op = new_rd_Conv(dbg, block, op, low_signed);
1492                                 entry->high_word = new_rd_Shrs(dbg, block, op, cnst,
1493                                                                low_signed);
1494                         } else {
1495                                 entry->high_word = new_r_Const(irg, get_mode_null(low_signed));
1496                         }
1497                 }
1498         } else if (imode == mode_b) {
1499                 entry->low_word = new_rd_Conv(dbg, block, op, low_unsigned);
1500                 entry->high_word = new_r_Const(irg, get_mode_null(low_signed));
1501         } else {
1502                 ir_node *irn, *call;
1503                 ir_type *mtp = get_conv_type(imode, omode, env);
1504
1505                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1506                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1507                 set_irn_pinned(call, get_irn_pinned(node));
1508                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1509
1510                 entry->low_word  = new_r_Proj(irn, low_unsigned, 0);
1511                 entry->high_word = new_r_Proj(irn, low_signed, 1);
1512         }
1513 }
1514
1515 /**
1516  * Translate a Conv from higher_unsigned
1517  */
1518 static void lower_Conv_from_Ll(ir_node *node, lower_env_t *env)
1519 {
1520         ir_node      *op    = get_Conv_op(node);
1521         ir_mode      *omode = get_irn_mode(node);
1522         ir_node      *block = get_nodes_block(node);
1523         dbg_info     *dbg   = get_irn_dbg_info(node);
1524         unsigned      idx   = get_irn_idx(op);
1525         ir_graph     *irg   = get_irn_irg(node);
1526         node_entry_t *entry = env->entries[idx];
1527
1528         assert(idx < env->n_entries);
1529
1530         if (! entry->low_word) {
1531                 /* not ready yet, wait */
1532                 pdeq_putr(env->waitq, node);
1533                 return;
1534         }
1535
1536         if (mode_is_int(omode) || mode_is_reference(omode)) {
1537                 op = entry->low_word;
1538
1539                 /* simple case: create a high word */
1540                 if (omode != env->low_unsigned)
1541                         op = new_rd_Conv(dbg, block, op, omode);
1542
1543                 set_Conv_op(node, op);
1544         } else if (omode == mode_b) {
1545                 /* llu ? true : false  <=> (low|high) ? true : false */
1546                 ir_mode *mode = env->low_unsigned;
1547                 ir_node *or   = new_rd_Or(dbg, block, entry->low_word, entry->high_word,
1548                                           mode);
1549                 set_Conv_op(node, or);
1550         } else {
1551                 ir_node *irn, *call, *in[2];
1552                 ir_mode *imode = get_irn_mode(op);
1553                 ir_type *mtp   = get_conv_type(imode, omode, env);
1554
1555                 irn   = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1556                 in[0] = entry->low_word;
1557                 in[1] = entry->high_word;
1558
1559                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1560                 set_irn_pinned(call, get_irn_pinned(node));
1561                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1562
1563                 exchange(node, new_r_Proj(irn, omode, 0));
1564         }
1565 }
1566
1567 /**
1568  * Translate a Conv.
1569  */
1570 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env)
1571 {
1572         mode = get_irn_mode(node);
1573
1574         if (mode == env->high_signed
1575                         || mode == env->high_unsigned) {
1576                 lower_Conv_to_Ll(node, env);
1577         } else {
1578                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1579
1580                 if (mode == env->high_signed
1581                                 || mode == env->high_unsigned) {
1582                         lower_Conv_from_Ll(node, env);
1583                 }
1584         }
1585 }
1586
1587 /**
1588  * Lower the method type.
1589  *
1590  * @param mtp  the method type to lower
1591  * @param ent  the lower environment
1592  *
1593  * @return the lowered type
1594  */
1595 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env)
1596 {
1597         pmap_entry *entry;
1598         ident      *lid;
1599         ir_type    *res, *value_type;
1600
1601         if (is_lowered_type(mtp))
1602                 return mtp;
1603
1604         entry = pmap_find(lowered_type, mtp);
1605         if (! entry) {
1606                 int i, n, r, n_param, n_res;
1607
1608                 /* count new number of params */
1609                 n_param = n = get_method_n_params(mtp);
1610                 for (i = n_param - 1; i >= 0; --i) {
1611                         ir_type *tp = get_method_param_type(mtp, i);
1612
1613                         if (is_Primitive_type(tp)) {
1614                                 ir_mode *mode = get_type_mode(tp);
1615
1616                                 if (mode == env->high_signed ||
1617                                         mode == env->high_unsigned)
1618                                         ++n_param;
1619                         }
1620                 }
1621
1622                 /* count new number of results */
1623                 n_res = r = get_method_n_ress(mtp);
1624                 for (i = n_res - 1; i >= 0; --i) {
1625                         ir_type *tp = get_method_res_type(mtp, i);
1626
1627                         if (is_Primitive_type(tp)) {
1628                                 ir_mode *mode = get_type_mode(tp);
1629
1630                                 if (mode == env->high_signed ||
1631                                         mode == env->high_unsigned)
1632                                         ++n_res;
1633                         }
1634                 }
1635
1636                 res = new_type_method(n_param, n_res);
1637
1638                 /* set param types and result types */
1639                 for (i = n_param = 0; i < n; ++i) {
1640                         ir_type *tp = get_method_param_type(mtp, i);
1641
1642                         if (is_Primitive_type(tp)) {
1643                                 ir_mode *mode = get_type_mode(tp);
1644
1645                                 if (mode == env->high_signed) {
1646                                         set_method_param_type(res, n_param++, tp_u);
1647                                         set_method_param_type(res, n_param++, tp_s);
1648                                 } else if (mode == env->high_unsigned) {
1649                                         set_method_param_type(res, n_param++, tp_u);
1650                                         set_method_param_type(res, n_param++, tp_u);
1651                                 } else {
1652                                         set_method_param_type(res, n_param++, tp);
1653                                 }
1654                         } else {
1655                                 set_method_param_type(res, n_param++, tp);
1656                         }
1657                 }
1658                 for (i = n_res = 0; i < r; ++i) {
1659                         ir_type *tp = get_method_res_type(mtp, i);
1660
1661                         if (is_Primitive_type(tp)) {
1662                                 ir_mode *mode = get_type_mode(tp);
1663
1664                                 if (mode == env->high_signed) {
1665                                         set_method_res_type(res, n_res++, tp_u);
1666                                         set_method_res_type(res, n_res++, tp_s);
1667                                 } else if (mode == env->high_unsigned) {
1668                                         set_method_res_type(res, n_res++, tp_u);
1669                                         set_method_res_type(res, n_res++, tp_u);
1670                                 } else {
1671                                         set_method_res_type(res, n_res++, tp);
1672                                 }
1673                         } else {
1674                                 set_method_res_type(res, n_res++, tp);
1675                         }
1676                 }
1677                 set_lowered_type(mtp, res);
1678                 pmap_insert(lowered_type, mtp, res);
1679
1680                 value_type = get_method_value_param_type(mtp);
1681                 if (value_type != NULL) {
1682                         /* this creates a new value parameter type */
1683                         (void)get_method_value_param_ent(res, 0);
1684
1685                         /* set new param positions */
1686                         for (i = n_param = 0; i < n; ++i) {
1687                                 ir_type   *tp  = get_method_param_type(mtp, i);
1688                                 ident     *id  = get_method_param_ident(mtp, i);
1689                                 ir_entity *ent = get_method_value_param_ent(mtp, i);
1690
1691                                 set_entity_link(ent, INT_TO_PTR(n_param));
1692                                 if (is_Primitive_type(tp)) {
1693                                         ir_mode *mode = get_type_mode(tp);
1694
1695                                         if (mode == env->high_signed || mode == env->high_unsigned) {
1696                                                 if (id != NULL) {
1697                                                         lid = id_mangle(id, env->first_id);
1698                                                         set_method_param_ident(res, n_param, lid);
1699                                                         set_entity_ident(get_method_value_param_ent(res, n_param), lid);
1700                                                         lid = id_mangle(id, env->next_id);
1701                                                         set_method_param_ident(res, n_param + 1, lid);
1702                                                         set_entity_ident(get_method_value_param_ent(res, n_param + 1), lid);
1703                                                 }
1704                                                 n_param += 2;
1705                                                 continue;
1706                                         }
1707                                 }
1708                                 if (id != NULL) {
1709                                         set_method_param_ident(res, n_param, id);
1710                                         set_entity_ident(get_method_value_param_ent(res, n_param), id);
1711                                 }
1712                                 ++n_param;
1713                         }
1714
1715                         set_lowered_type(value_type, get_method_value_param_type(res));
1716                 }
1717         } else {
1718                 res = entry->value;
1719         }
1720         return res;
1721 }
1722
1723 /**
1724  * Translate a Return.
1725  */
1726 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env)
1727 {
1728         ir_graph  *irg = get_irn_irg(node);
1729         ir_entity *ent = get_irg_entity(irg);
1730         ir_type   *mtp = get_entity_type(ent);
1731         ir_node  **in;
1732         int        i, j, n;
1733         unsigned   idx;
1734         int        need_conv = 0;
1735         (void) mode;
1736
1737         /* check if this return must be lowered */
1738         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1739                 ir_node *pred = get_Return_res(node, i);
1740                 ir_mode *mode = get_irn_op_mode(pred);
1741
1742                 if (mode == env->high_signed ||
1743                         mode == env->high_unsigned) {
1744                         idx = get_irn_idx(pred);
1745                         if (! env->entries[idx]->low_word) {
1746                                 /* not ready yet, wait */
1747                                 pdeq_putr(env->waitq, node);
1748                                 return;
1749                         }
1750                         need_conv = 1;
1751                 }
1752         }
1753         if (! need_conv)
1754                 return;
1755
1756         ent = get_irg_entity(irg);
1757         mtp = get_entity_type(ent);
1758
1759         mtp = lower_mtp(mtp, env);
1760         set_entity_type(ent, mtp);
1761
1762         /* create a new in array */
1763         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1764         in[0] = get_Return_mem(node);
1765
1766         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1767                 ir_node *pred = get_Return_res(node, i);
1768
1769                 idx = get_irn_idx(pred);
1770                 assert(idx < env->n_entries);
1771
1772                 if (env->entries[idx]) {
1773                         in[++j] = env->entries[idx]->low_word;
1774                         in[++j] = env->entries[idx]->high_word;
1775                 } else {
1776                         in[++j] = pred;
1777                 }
1778         }
1779
1780         set_irn_in(node, j+1, in);
1781 }
1782
1783 /**
1784  * Translate the parameters.
1785  */
1786 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env)
1787 {
1788         ir_graph  *irg = get_irn_irg(node);
1789         ir_entity *ent = get_irg_entity(irg);
1790         ir_type   *tp  = get_entity_type(ent);
1791         ir_type   *mtp;
1792         long      *new_projs;
1793         int       i, j, n_params, rem;
1794         ir_node   *proj, *args;
1795         (void) mode;
1796
1797         if (is_lowered_type(tp)) {
1798                 mtp = get_associated_type(tp);
1799         } else {
1800                 mtp = tp;
1801         }
1802         assert(! is_lowered_type(mtp));
1803
1804         n_params = get_method_n_params(mtp);
1805         if (n_params <= 0)
1806                 return;
1807
1808         NEW_ARR_A(long, new_projs, n_params);
1809
1810         /* first check if we have parameters that must be fixed */
1811         for (i = j = 0; i < n_params; ++i, ++j) {
1812                 ir_type *tp = get_method_param_type(mtp, i);
1813
1814                 new_projs[i] = j;
1815                 if (is_Primitive_type(tp)) {
1816                         ir_mode *mode = get_type_mode(tp);
1817
1818                         if (mode == env->high_signed ||
1819                                 mode == env->high_unsigned)
1820                                 ++j;
1821                 }
1822         }
1823         if (i == j)
1824                 return;
1825
1826         mtp = lower_mtp(mtp, env);
1827         set_entity_type(ent, mtp);
1828
1829         /* switch off optimization for new Proj nodes or they might be CSE'ed
1830            with not patched one's */
1831         rem = get_optimize();
1832         set_optimize(0);
1833
1834         /* ok, fix all Proj's and create new ones */
1835         args = get_irg_args(irg);
1836         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1837                 ir_node *pred = get_Proj_pred(proj);
1838                 long proj_nr;
1839                 unsigned idx;
1840                 ir_mode *mode;
1841                 dbg_info *dbg;
1842
1843                 /* do not visit this node again */
1844                 mark_irn_visited(proj);
1845
1846                 if (pred != args)
1847                         continue;
1848
1849                 proj_nr = get_Proj_proj(proj);
1850                 set_Proj_proj(proj, new_projs[proj_nr]);
1851
1852                 idx = get_irn_idx(proj);
1853                 if (env->entries[idx]) {
1854                         ir_mode *low_mode = env->low_unsigned;
1855
1856                         mode = get_irn_mode(proj);
1857
1858                         if (mode == env->high_signed) {
1859                                 mode = env->low_signed;
1860                         } else {
1861                                 mode = env->low_unsigned;
1862                         }
1863
1864                         dbg = get_irn_dbg_info(proj);
1865                         env->entries[idx]->low_word  =
1866                                 new_rd_Proj(dbg, args, low_mode, new_projs[proj_nr]);
1867                         env->entries[idx]->high_word =
1868                                 new_rd_Proj(dbg, args, mode, new_projs[proj_nr] + 1);
1869                 }
1870         }
1871         set_optimize(rem);
1872 }
1873
1874 /**
1875  * Translate a Call.
1876  */
1877 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env)
1878 {
1879         ir_type  *tp = get_Call_type(node);
1880         ir_type  *call_tp;
1881         ir_node  **in, *proj, *results;
1882         int      n_params, n_res, need_lower = 0;
1883         int      i, j;
1884         long     *res_numbers = NULL;
1885         (void) mode;
1886
1887         if (is_lowered_type(tp)) {
1888                 call_tp = get_associated_type(tp);
1889         } else {
1890                 call_tp = tp;
1891         }
1892
1893         assert(! is_lowered_type(call_tp));
1894
1895         n_params = get_method_n_params(call_tp);
1896         for (i = 0; i < n_params; ++i) {
1897                 ir_type *tp = get_method_param_type(call_tp, i);
1898
1899                 if (is_Primitive_type(tp)) {
1900                         ir_mode *mode = get_type_mode(tp);
1901
1902                         if (mode == env->high_signed ||
1903                                 mode == env->high_unsigned) {
1904                                 need_lower = 1;
1905                                 break;
1906                         }
1907                 }
1908         }
1909         n_res = get_method_n_ress(call_tp);
1910         if (n_res > 0) {
1911                 NEW_ARR_A(long, res_numbers, n_res);
1912
1913                 for (i = j = 0; i < n_res; ++i, ++j) {
1914                         ir_type *tp = get_method_res_type(call_tp, i);
1915
1916                         res_numbers[i] = j;
1917                         if (is_Primitive_type(tp)) {
1918                                 ir_mode *mode = get_type_mode(tp);
1919
1920                                 if (mode == env->high_signed ||
1921                                         mode == env->high_unsigned) {
1922                                         need_lower = 1;
1923                                         ++j;
1924                                 }
1925                         }
1926                 }
1927         }
1928
1929         if (! need_lower)
1930                 return;
1931
1932         /* let's lower it */
1933         call_tp = lower_mtp(call_tp, env);
1934         set_Call_type(node, call_tp);
1935
1936         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1937
1938         in[0] = get_Call_mem(node);
1939         in[1] = get_Call_ptr(node);
1940
1941         for (j = 2, i = 0; i < n_params; ++i) {
1942                 ir_node *pred = get_Call_param(node, i);
1943                 unsigned idx = get_irn_idx(pred);
1944
1945                 if (env->entries[idx]) {
1946                         if (! env->entries[idx]->low_word) {
1947                                 /* not ready yet, wait */
1948                                 pdeq_putr(env->waitq, node);
1949                                 return;
1950                         }
1951                         in[j++] = env->entries[idx]->low_word;
1952                         in[j++] = env->entries[idx]->high_word;
1953                 } else {
1954                         in[j++] = pred;
1955                 }
1956         }
1957
1958         set_irn_in(node, j, in);
1959
1960         /* fix the results */
1961         results = NULL;
1962         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1963                 long proj_nr = get_Proj_proj(proj);
1964
1965                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
1966                         /* found the result proj */
1967                         results = proj;
1968                         break;
1969                 }
1970         }
1971
1972         if (results) {    /* there are results */
1973                 int rem = get_optimize();
1974
1975                 /* switch off optimization for new Proj nodes or they might be CSE'ed
1976                    with not patched one's */
1977                 set_optimize(0);
1978                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
1979                         if (get_Proj_pred(proj) == results) {
1980                                 long proj_nr = get_Proj_proj(proj);
1981                                 unsigned idx;
1982
1983                                 /* found a result */
1984                                 set_Proj_proj(proj, res_numbers[proj_nr]);
1985                                 idx = get_irn_idx(proj);
1986                                 if (env->entries[idx]) {
1987                                         ir_mode *mode = get_irn_mode(proj);
1988                                         ir_mode *low_mode = env->low_unsigned;
1989                                         dbg_info *dbg;
1990
1991                                         if (mode == env->high_signed) {
1992                                                 mode = env->low_signed;
1993                                         } else {
1994                                                 mode = env->low_unsigned;
1995                                         }
1996
1997                                         dbg = get_irn_dbg_info(proj);
1998                                         env->entries[idx]->low_word  =
1999                                                 new_rd_Proj(dbg, results, low_mode, res_numbers[proj_nr]);
2000                                         env->entries[idx]->high_word =
2001                                                 new_rd_Proj(dbg, results, mode, res_numbers[proj_nr] + 1);
2002                                 }
2003                                 mark_irn_visited(proj);
2004                         }
2005                 }
2006                 set_optimize(rem);
2007         }
2008 }
2009
2010 /**
2011  * Translate an Unknown into two.
2012  */
2013 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env)
2014 {
2015         unsigned  idx = get_irn_idx(node);
2016         ir_graph *irg = get_irn_irg(node);
2017         ir_mode  *low_mode = env->low_unsigned;
2018
2019         env->entries[idx]->low_word  = new_r_Unknown(irg, low_mode);
2020         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2021 }
2022
2023 /**
2024  * Translate a Phi.
2025  *
2026  * First step: just create two templates
2027  */
2028 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env)
2029 {
2030         ir_mode  *mode_l = env->low_unsigned;
2031         ir_graph *irg = get_irn_irg(phi);
2032         ir_node  *block, *unk_l, *unk_h, *phi_l, *phi_h;
2033         ir_node  **inl, **inh;
2034         dbg_info *dbg;
2035         unsigned  idx;
2036         int       i, arity = get_Phi_n_preds(phi);
2037         int       enq = 0;
2038
2039         idx = get_irn_idx(phi);
2040         if (env->entries[idx]->low_word) {
2041                 /* Phi nodes already build, check for inputs */
2042                 ir_node *phil = env->entries[idx]->low_word;
2043                 ir_node *phih = env->entries[idx]->high_word;
2044
2045                 for (i = 0; i < arity; ++i) {
2046                         ir_node *pred = get_Phi_pred(phi, i);
2047                         unsigned idx = get_irn_idx(pred);
2048
2049                         if (env->entries[idx]->low_word) {
2050                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2051                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2052                         } else {
2053                                 /* still not ready */
2054                                 pdeq_putr(env->waitq, phi);
2055                                 return;
2056                         }
2057                 }
2058         }
2059
2060         /* first create a new in array */
2061         NEW_ARR_A(ir_node *, inl, arity);
2062         NEW_ARR_A(ir_node *, inh, arity);
2063         unk_l = new_r_Dummy(irg, mode_l);
2064         unk_h = new_r_Dummy(irg, mode);
2065
2066         for (i = 0; i < arity; ++i) {
2067                 ir_node *pred = get_Phi_pred(phi, i);
2068                 unsigned idx  = get_irn_idx(pred);
2069
2070                 if (env->entries[idx]->low_word) {
2071                         inl[i] = env->entries[idx]->low_word;
2072                         inh[i] = env->entries[idx]->high_word;
2073                 } else {
2074                         inl[i] = unk_l;
2075                         inh[i] = unk_h;
2076                         enq = 1;
2077                 }
2078         }
2079
2080         dbg   = get_irn_dbg_info(phi);
2081         block = get_nodes_block(phi);
2082
2083         idx = get_irn_idx(phi);
2084         assert(idx < env->n_entries);
2085         env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, block, arity, inl, mode_l);
2086         env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, block, arity, inh, mode);
2087
2088         /* Don't forget to link the new Phi nodes into the block.
2089          * Beware that some Phis might be optimized away. */
2090         if (is_Phi(phi_l))
2091                 add_Block_phi(block, phi_l);
2092         if (is_Phi(phi_h))
2093                 add_Block_phi(block, phi_h);
2094
2095         if (enq) {
2096                 /* not yet finished */
2097                 pdeq_putr(env->waitq, phi);
2098         }
2099 }
2100
2101 /**
2102  * Translate a Mux.
2103  */
2104 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env)
2105 {
2106         ir_node  *block, *val;
2107         ir_node  *true_l, *true_h, *false_l, *false_h, *sel;
2108         dbg_info *dbg;
2109         unsigned  idx;
2110
2111         val = get_Mux_true(mux);
2112         idx = get_irn_idx(val);
2113         if (env->entries[idx]->low_word) {
2114                 /* Values already build */
2115                 true_l = env->entries[idx]->low_word;
2116                 true_h = env->entries[idx]->high_word;
2117         } else {
2118                 /* still not ready */
2119                 pdeq_putr(env->waitq, mux);
2120                 return;
2121         }
2122
2123         val = get_Mux_false(mux);
2124         idx = get_irn_idx(val);
2125         if (env->entries[idx]->low_word) {
2126                 /* Values already build */
2127                 false_l = env->entries[idx]->low_word;
2128                 false_h = env->entries[idx]->high_word;
2129         } else {
2130                 /* still not ready */
2131                 pdeq_putr(env->waitq, mux);
2132                 return;
2133         }
2134
2135
2136         sel = get_Mux_sel(mux);
2137
2138         dbg   = get_irn_dbg_info(mux);
2139         block = get_nodes_block(mux);
2140
2141         idx = get_irn_idx(mux);
2142         assert(idx < env->n_entries);
2143         env->entries[idx]->low_word  = new_rd_Mux(dbg, block, sel, false_l, true_l, env->low_unsigned);
2144         env->entries[idx]->high_word = new_rd_Mux(dbg, block, sel, false_h, true_h, mode);
2145 }
2146
2147 /**
2148  * Translate an ASM node.
2149  */
2150 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env)
2151 {
2152         ir_mode *his = env->high_signed;
2153         ir_mode *hiu = env->high_unsigned;
2154         int      i;
2155         ir_node *n;
2156
2157         (void)mode;
2158
2159         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2160                 ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
2161                 if (op_mode == his || op_mode == hiu) {
2162                         panic("lowering ASM unimplemented");
2163                 }
2164         }
2165
2166         for (n = asmn;;) {
2167                 ir_mode *proj_mode;
2168
2169                 n = get_irn_link(n);
2170                 if (n == NULL)
2171                         break;
2172
2173                 proj_mode = get_irn_mode(n);
2174                 if (proj_mode == his || proj_mode == hiu) {
2175                         panic("lowering ASM unimplemented");
2176                 }
2177         }
2178 }
2179
2180 /**
2181  * Translate a Sel node.
2182  */
2183 static void lower_Sel(ir_node *sel, ir_mode *mode, lower_env_t *env)
2184 {
2185         (void) mode;
2186
2187         /* we must only lower value parameter Sels if we change the
2188            value parameter type. */
2189         if (env->value_param_tp != NULL) {
2190                 ir_entity *ent = get_Sel_entity(sel);
2191             if (get_entity_owner(ent) == env->value_param_tp) {
2192                         int pos = PTR_TO_INT(get_entity_link(ent));
2193
2194                         ent = get_method_value_param_ent(env->l_mtp, pos);
2195                         set_Sel_entity(sel, ent);
2196                 }
2197         }
2198 }
2199
2200 /**
2201  * check for opcodes that must always be lowered.
2202  */
2203 static int always_lower(ir_opcode code)
2204 {
2205         switch (code) {
2206         case iro_ASM:
2207         case iro_Proj:
2208         case iro_Start:
2209         case iro_Call:
2210         case iro_Return:
2211         case iro_Cond:
2212         case iro_Conv:
2213         case iro_Sel:
2214                 return 1;
2215         default:
2216                 return 0;
2217         }
2218 }
2219
2220 /**
2221  * lower boolean Proj(Cmp)
2222  */
2223 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env)
2224 {
2225         unsigned  lidx;
2226         unsigned  ridx;
2227         ir_node  *l, *r, *low, *high, *t, *res;
2228         pn_Cmp   pnc;
2229         ir_node  *blk;
2230         dbg_info *db;
2231
2232         l    = get_Cmp_left(cmp);
2233         lidx = get_irn_idx(l);
2234         if (! env->entries[lidx]->low_word) {
2235                 /* still not ready */
2236                 return NULL;
2237         }
2238
2239         r    = get_Cmp_right(cmp);
2240         ridx = get_irn_idx(r);
2241         if (! env->entries[ridx]->low_word) {
2242                 /* still not ready */
2243                 return NULL;
2244         }
2245
2246         pnc  = get_Proj_proj(proj);
2247         blk  = get_nodes_block(cmp);
2248         db   = get_irn_dbg_info(cmp);
2249         low  = new_rd_Cmp(db, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2250         high = new_rd_Cmp(db, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2251
2252         if (pnc == pn_Cmp_Eq) {
2253                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2254                 res = new_rd_And(db, blk,
2255                         new_r_Proj(low, mode_b, pnc),
2256                         new_r_Proj(high, mode_b, pnc),
2257                         mode_b);
2258         } else if (pnc == pn_Cmp_Lg) {
2259                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2260                 res = new_rd_Or(db, blk,
2261                         new_r_Proj(low, mode_b, pnc),
2262                         new_r_Proj(high, mode_b, pnc),
2263                         mode_b);
2264         } else {
2265                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2266                 t = new_rd_And(db, blk,
2267                         new_r_Proj(low, mode_b, pnc),
2268                         new_r_Proj(high, mode_b, pn_Cmp_Eq),
2269                         mode_b);
2270                 res = new_rd_Or(db, blk,
2271                         new_r_Proj(high, mode_b, pnc & ~pn_Cmp_Eq),
2272                         t,
2273                         mode_b);
2274         }
2275         return res;
2276 }
2277
2278 /**
2279  * The type of a lower function.
2280  *
2281  * @param node   the node to be lowered
2282  * @param mode   the low mode for the destination node
2283  * @param env    the lower environment
2284  */
2285 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2286
2287 /**
2288  * Lower a node.
2289  */
2290 static void lower_ops(ir_node *node, void *env)
2291 {
2292         lower_env_t  *lenv = env;
2293         node_entry_t *entry;
2294         unsigned      idx = get_irn_idx(node);
2295         ir_mode      *mode = get_irn_mode(node);
2296
2297         if (mode == mode_b || is_Mux(node) || is_Conv(node)) {
2298                 int i;
2299
2300                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2301                         ir_node *proj = get_irn_n(node, i);
2302
2303                         if (is_Proj(proj)) {
2304                                 ir_node *cmp = get_Proj_pred(proj);
2305
2306                                 if (is_Cmp(cmp)) {
2307                                         ir_node *arg = get_Cmp_left(cmp);
2308
2309                                         mode = get_irn_mode(arg);
2310                                         if (mode == lenv->high_signed ||
2311                                                 mode == lenv->high_unsigned) {
2312                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2313
2314                                                 if (res == NULL) {
2315                                                         /* could not lower because predecessors not ready */
2316                                                         waitq_put(lenv->waitq, node);
2317                                                         return;
2318                                                 }
2319                                                 set_irn_n(node, i, res);
2320                                         }
2321                                 }
2322                         }
2323                 }
2324         }
2325
2326         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2327         if (entry || always_lower(get_irn_opcode(node))) {
2328                 ir_op      *op = get_irn_op(node);
2329                 lower_func func = (lower_func)op->ops.generic;
2330
2331                 if (func) {
2332                         mode = get_irn_op_mode(node);
2333
2334                         if (mode == lenv->high_signed)
2335                                 mode = lenv->low_signed;
2336                         else
2337                                 mode = lenv->low_unsigned;
2338
2339                         DB((dbg, LEVEL_1, "  %+F\n", node));
2340                         func(node, mode, lenv);
2341                 }
2342         }
2343 }
2344
2345 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2346
2347 /**
2348  * Compare two op_mode_entry_t's.
2349  */
2350 static int cmp_op_mode(const void *elt, const void *key, size_t size)
2351 {
2352         const op_mode_entry_t *e1 = elt;
2353         const op_mode_entry_t *e2 = key;
2354         (void) size;
2355
2356         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2357 }
2358
2359 /**
2360  * Compare two conv_tp_entry_t's.
2361  */
2362 static int cmp_conv_tp(const void *elt, const void *key, size_t size)
2363 {
2364         const conv_tp_entry_t *e1 = elt;
2365         const conv_tp_entry_t *e2 = key;
2366         (void) size;
2367
2368         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2369 }
2370
2371 /**
2372  * Enter a lowering function into an ir_op.
2373  */
2374 static void enter_lower_func(ir_op *op, lower_func func)
2375 {
2376         op->ops.generic = (op_func)func;
2377 }
2378
2379 /**
2380  * Returns non-zero if a method type must be lowered.
2381  *
2382  * @param mtp  the method type
2383  */
2384 static int mtp_must_be_lowered(ir_type *mtp, lower_env_t *env)
2385 {
2386         int i, n_params;
2387
2388         n_params = get_method_n_params(mtp);
2389         if (n_params <= 0)
2390                 return 0;
2391
2392         /* first check if we have parameters that must be fixed */
2393         for (i = 0; i < n_params; ++i) {
2394                 ir_type *tp = get_method_param_type(mtp, i);
2395
2396                 if (is_Primitive_type(tp)) {
2397                         ir_mode *mode = get_type_mode(tp);
2398
2399                         if (mode == env->high_signed ||
2400                                 mode == env->high_unsigned)
2401                                 return 1;
2402                 }
2403         }
2404         return 0;
2405 }
2406
2407 static void setup_modes(lower_env_t *env)
2408 {
2409         unsigned           size_bits           = env->params->doubleword_size;
2410         ir_mode           *doubleword_signed   = NULL;
2411         ir_mode           *doubleword_unsigned = NULL;
2412         int                n_modes             = get_irp_n_modes();
2413         ir_mode_arithmetic arithmetic;
2414         unsigned           modulo_shift;
2415         int                i;
2416
2417         /* search for doubleword modes... */
2418         for (i = 0; i < n_modes; ++i) {
2419                 ir_mode *mode = get_irp_mode(i);
2420                 if (!mode_is_int(mode))
2421                         continue;
2422                 if (get_mode_size_bits(mode) != size_bits)
2423                         continue;
2424                 if (mode_is_signed(mode)) {
2425                         if (doubleword_signed != NULL) {
2426                                 /* sigh - the lowerer should really just lower all mode with
2427                                  * size_bits it finds. Unfortunately this required a bigger
2428                                  * rewrite. */
2429                                 panic("multiple double word signed modes found");
2430                         }
2431                         doubleword_signed = mode;
2432                 } else {
2433                         if (doubleword_unsigned != NULL) {
2434                                 /* sigh - the lowerer should really just lower all mode with
2435                                  * size_bits it finds. Unfortunately this required a bigger
2436                                  * rewrite. */
2437                                 panic("multiple double word unsigned modes found");
2438                         }
2439                         doubleword_unsigned = mode;
2440                 }
2441         }
2442         if (doubleword_signed == NULL || doubleword_unsigned == NULL) {
2443                 panic("Couldn't find doubleword modes");
2444         }
2445
2446         arithmetic   = get_mode_arithmetic(doubleword_signed);
2447         modulo_shift = get_mode_modulo_shift(doubleword_signed);
2448
2449         assert(get_mode_size_bits(doubleword_unsigned) == size_bits);
2450         assert(size_bits % 2 == 0);
2451         assert(get_mode_sign(doubleword_signed) == 1);
2452         assert(get_mode_sign(doubleword_unsigned) == 0);
2453         assert(get_mode_sort(doubleword_signed) == irms_int_number);
2454         assert(get_mode_sort(doubleword_unsigned) == irms_int_number);
2455         assert(get_mode_arithmetic(doubleword_unsigned) == arithmetic);
2456         assert(get_mode_modulo_shift(doubleword_unsigned) == modulo_shift);
2457
2458         /* try to guess a sensible modulo shift for the new mode.
2459          * (This is IMO another indication that this should really be a node
2460          *  attribute instead of a mode thing) */
2461         if (modulo_shift == size_bits) {
2462                 modulo_shift = modulo_shift / 2;
2463         } else if (modulo_shift == 0) {
2464                 /* fine */
2465         } else {
2466                 panic("Don't know what new modulo shift to use for lowered doubleword mode");
2467         }
2468         size_bits /= 2;
2469
2470         /* produce lowered modes */
2471         env->high_signed   = doubleword_signed;
2472         env->high_unsigned = doubleword_unsigned;
2473         env->low_signed    = new_ir_mode("WS", irms_int_number, size_bits, 1,
2474                                          arithmetic, modulo_shift);
2475         env->low_unsigned  = new_ir_mode("WU", irms_int_number, size_bits, 0,
2476                                          arithmetic, modulo_shift);
2477 }
2478
2479 /*
2480  * Do the lowering.
2481  */
2482 void lower_dw_ops(const lwrdw_param_t *param)
2483 {
2484         lower_env_t lenv;
2485         int         i;
2486
2487         if (! param)
2488                 return;
2489
2490         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2491
2492         memset(&lenv, 0, sizeof(lenv));
2493         lenv.params = param;
2494         setup_modes(&lenv);
2495
2496         /* create the necessary maps */
2497         if (! intrinsic_fkt)
2498                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2499         if (! conv_types)
2500                 conv_types = new_set(cmp_conv_tp, 16);
2501         if (! lowered_type)
2502                 lowered_type = pmap_create();
2503
2504         /* create a primitive unsigned and signed type */
2505         if (! tp_u)
2506                 tp_u = get_type_for_mode(lenv.low_unsigned);
2507         if (! tp_s)
2508                 tp_s = get_type_for_mode(lenv.low_signed);
2509
2510         /* create method types for the created binop calls */
2511         if (! binop_tp_u) {
2512                 binop_tp_u = new_type_method(4, 2);
2513                 set_method_param_type(binop_tp_u, 0, tp_u);
2514                 set_method_param_type(binop_tp_u, 1, tp_u);
2515                 set_method_param_type(binop_tp_u, 2, tp_u);
2516                 set_method_param_type(binop_tp_u, 3, tp_u);
2517                 set_method_res_type(binop_tp_u, 0, tp_u);
2518                 set_method_res_type(binop_tp_u, 1, tp_u);
2519         }
2520         if (! binop_tp_s) {
2521                 binop_tp_s = new_type_method(4, 2);
2522                 set_method_param_type(binop_tp_s, 0, tp_u);
2523                 set_method_param_type(binop_tp_s, 1, tp_s);
2524                 set_method_param_type(binop_tp_s, 2, tp_u);
2525                 set_method_param_type(binop_tp_s, 3, tp_s);
2526                 set_method_res_type(binop_tp_s, 0, tp_u);
2527                 set_method_res_type(binop_tp_s, 1, tp_s);
2528         }
2529         if (! shiftop_tp_u) {
2530                 shiftop_tp_u = new_type_method(3, 2);
2531                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2532                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2533                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2534                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2535                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2536         }
2537         if (! shiftop_tp_s) {
2538                 shiftop_tp_s = new_type_method(3, 2);
2539                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2540                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2541                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2542                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2543                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2544         }
2545         if (! unop_tp_u) {
2546                 unop_tp_u = new_type_method(2, 2);
2547                 set_method_param_type(unop_tp_u, 0, tp_u);
2548                 set_method_param_type(unop_tp_u, 1, tp_u);
2549                 set_method_res_type(unop_tp_u, 0, tp_u);
2550                 set_method_res_type(unop_tp_u, 1, tp_u);
2551         }
2552         if (! unop_tp_s) {
2553                 unop_tp_s = new_type_method(2, 2);
2554                 set_method_param_type(unop_tp_s, 0, tp_u);
2555                 set_method_param_type(unop_tp_s, 1, tp_s);
2556                 set_method_res_type(unop_tp_s, 0, tp_u);
2557                 set_method_res_type(unop_tp_s, 1, tp_s);
2558         }
2559
2560         lenv.tv_mode_bytes = new_tarval_from_long(param->doubleword_size/(2*8), lenv.low_unsigned);
2561         lenv.tv_mode_bits  = new_tarval_from_long(param->doubleword_size/2, lenv.low_unsigned);
2562         lenv.waitq         = new_pdeq();
2563         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
2564         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
2565
2566         clear_irp_opcodes_generic_func();
2567         enter_lower_func(op_Add,     lower_Binop);
2568         enter_lower_func(op_And,     lower_And);
2569         enter_lower_func(op_ASM,     lower_ASM);
2570         enter_lower_func(op_Call,    lower_Call);
2571         enter_lower_func(op_Cond,    lower_Cond);
2572         enter_lower_func(op_Const,   lower_Const);
2573         enter_lower_func(op_Conv,    lower_Conv);
2574         enter_lower_func(op_Div,     lower_Div);
2575         enter_lower_func(op_DivMod,  lower_DivMod);
2576         enter_lower_func(op_Eor,     lower_Eor);
2577         enter_lower_func(op_Load,    lower_Load);
2578         enter_lower_func(op_Minus,   lower_Unop);
2579         enter_lower_func(op_Mod,     lower_Mod);
2580         enter_lower_func(op_Mul,     lower_Binop);
2581         enter_lower_func(op_Mux,     lower_Mux);
2582         enter_lower_func(op_Not,     lower_Not);
2583         enter_lower_func(op_Or,      lower_Or);
2584         enter_lower_func(op_Phi,     lower_Phi);
2585         enter_lower_func(op_Return,  lower_Return);
2586         enter_lower_func(op_Sel,     lower_Sel);
2587         enter_lower_func(op_Shl,     lower_Shl);
2588         enter_lower_func(op_Shr,     lower_Shr);
2589         enter_lower_func(op_Shrs,    lower_Shrs);
2590         enter_lower_func(op_Start,   lower_Start);
2591         enter_lower_func(op_Store,   lower_Store);
2592         enter_lower_func(op_Sub,     lower_Binop);
2593         enter_lower_func(op_Unknown, lower_Unknown);
2594
2595         /* transform all graphs */
2596         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2597                 ir_graph  *irg = get_irp_irg(i);
2598                 ir_entity *ent;
2599                 ir_type   *mtp;
2600                 unsigned n_idx;
2601
2602                 obstack_init(&lenv.obst);
2603
2604                 n_idx = get_irg_last_idx(irg);
2605                 n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2606                 lenv.n_entries = n_idx;
2607                 lenv.entries   = NEW_ARR_F(node_entry_t *, n_idx);
2608                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2609
2610                 lenv.irg          = irg;
2611                 lenv.l_mtp        = NULL;
2612                 lenv.flags        = 0;
2613                 lenv.proj_2_block = pmap_create();
2614                 lenv.value_param_tp = NULL;
2615                 ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2616
2617                 ent = get_irg_entity(irg);
2618                 mtp = get_entity_type(ent);
2619
2620                 if (mtp_must_be_lowered(mtp, &lenv)) {
2621                         ir_type *ltp = lower_mtp(mtp, &lenv);
2622                         lenv.flags |= MUST_BE_LOWERED;
2623                         set_entity_type(ent, ltp);
2624                         lenv.l_mtp = ltp;
2625                         lenv.value_param_tp = get_method_value_param_type(mtp);
2626                 }
2627
2628                 /* first step: link all nodes and allocate data */
2629                 irg_walk_graph(irg, firm_clear_node_and_phi_links, prepare_links_and_handle_rotl, &lenv);
2630
2631                 if (lenv.flags & MUST_BE_LOWERED) {
2632                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2633
2634                         /* must do some work */
2635                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2636
2637                         /* last step: all waiting nodes */
2638                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2639                         while (! pdeq_empty(lenv.waitq)) {
2640                                 ir_node *node = pdeq_getl(lenv.waitq);
2641
2642                                 lower_ops(node, &lenv);
2643                         }
2644
2645                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2646
2647                         /* outs are invalid, we changed the graph */
2648                         set_irg_outs_inconsistent(irg);
2649
2650                         if (lenv.flags & CF_CHANGED) {
2651                                 /* control flow changed, dominance info is invalid */
2652                                 set_irg_doms_inconsistent(irg);
2653                                 set_irg_extblk_inconsistent(irg);
2654                                 set_irg_loopinfo_inconsistent(irg);
2655                         }
2656                 } else {
2657                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2658                 }
2659                 pmap_destroy(lenv.proj_2_block);
2660                 DEL_ARR_F(lenv.entries);
2661                 obstack_free(&lenv.obst, NULL);
2662         }
2663         del_pdeq(lenv.waitq);
2664 }
2665
2666 /* Default implementation. */
2667 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2668                                     const ir_mode *imode, const ir_mode *omode,
2669                                     void *context)
2670 {
2671         char buf[64];
2672         ident *id;
2673         ir_entity *ent;
2674         (void) context;
2675
2676         if (imode == omode) {
2677                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2678         } else {
2679                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2680                         get_mode_name(imode), get_mode_name(omode));
2681         }
2682         id = new_id_from_str(buf);
2683
2684         ent = new_entity(get_glob_type(), id, method);
2685         set_entity_ld_ident(ent, get_entity_ident(ent));
2686         return ent;
2687 }