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

   1 /*
   2  * Copyright (C) 1995-2011 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, i.e. 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 <stdbool.h>
  32 #include <assert.h>
  33
  34 #include "error.h"
  35 #include "lowering.h"
  36 #include "irnode_t.h"
  37 #include "irgraph_t.h"
  38 #include "irmode_t.h"
  39 #include "iropt_t.h"
  40 #include "irgmod.h"
  41 #include "tv_t.h"
  42 #include "dbginfo_t.h"
  43 #include "iropt_dbg.h"
  44 #include "irflag_t.h"
  45 #include "firmstat.h"
  46 #include "irgwalk.h"
  47 #include "ircons.h"
  48 #include "irflag.h"
  49 #include "irtools.h"
  50 #include "debug.h"
  51 #include "set.h"
  52 #include "pmap.h"
  53 #include "pdeq.h"
  54 #include "irdump.h"
  55 #include "array_t.h"
  56 #include "irpass_t.h"
  57
  58 typedef struct lower_env_t lower_env_t;
  59
  60 /**
  61  * The type of a lower function.
  62  *
  63  * @param node   the node to be lowered
  64  * @param env    the lower environment
  65  */
  66 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
  67
  68 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  69 static set *intrinsic_fkt;
  70
  71 /** A map from (imode, omode) to conv function types. */
  72 static set *conv_types;
  73
  74 /** A map from a method type to its lowered type. */
  75 static pmap *lowered_type;
  76
  77 /** The types for the binop and unop intrinsics. */
  78 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;
  79
  80 /** the debug handle */
  81 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  82
  83 /**
  84  * An entry in the (op, imode, omode) -> entity map.
  85  */
  86 typedef struct op_mode_entry {
  87         const ir_op   *op;    /**< the op */
  88         const ir_mode *imode; /**< the input mode */
  89         const ir_mode *omode; /**< the output mode */
  90         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  91 } op_mode_entry_t;
  92
  93 /**
  94  * An entry in the (imode, omode) -> tp map.
  95  */
  96 typedef struct conv_tp_entry {
  97         const ir_mode *imode; /**< the input mode */
  98         const ir_mode *omode; /**< the output mode */
  99         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
 100 } conv_tp_entry_t;
 101
 102 /**
 103  * Every double word node will be replaced,
 104  * we need some store to hold the replacement:
 105  */
 106 typedef struct node_entry_t {
 107         ir_node *low_word;    /**< the low word */
 108         ir_node *high_word;   /**< the high word */
 109 } node_entry_t;
 110
 111 enum lower_flags {
 112         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 113         CF_CHANGED      = 2,  /**< control flow was changed */
 114 };
 115
 116 /**
 117  * The lower environment.
 118  */
 119 struct lower_env_t {
 120         node_entry_t **entries;       /**< entries per node */
 121         ir_graph      *irg;
 122         struct obstack obst;          /**< an obstack holding the temporary data */
 123         ir_type   *l_mtp;              /**< lowered method type of the current method */
 124         ir_tarval *tv_mode_bytes;     /**< a tarval containing the number of bytes in the lowered modes */
 125         ir_tarval *tv_mode_bits;      /**< a tarval containing the number of bits in the lowered modes */
 126         pdeq      *waitq;              /**< a wait queue of all nodes that must be handled later */
 127         ir_node  **lowered_phis;       /**< list of lowered phis */
 128         pmap      *proj_2_block;       /**< a map from ProjX to its destination blocks */
 129         ir_mode   *high_signed;        /**< doubleword signed type */
 130         ir_mode   *high_unsigned;      /**< doubleword unsigned type */
 131         ir_mode   *low_signed;         /**< word signed type */
 132         ir_mode   *low_unsigned;       /**< word unsigned type */
 133         ident     *first_id;           /**< .l for little and .h for big endian */
 134         ident     *next_id;            /**< .h for little and .l for big endian */
 135         const lwrdw_param_t *params;  /**< transformation parameter */
 136         unsigned flags;               /**< some flags */
 137         unsigned n_entries;           /**< number of entries */
 138         ir_type  *value_param_tp;     /**< the old value param type */
 139 };
 140
 141 static void lower_node(lower_env_t *env, ir_node *node);
 142
 143 /**
 144  * Create a method type for a Conv emulation from imode to omode.
 145  */
 146 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env)
 147 {
 148         conv_tp_entry_t key, *entry;
 149         ir_type *mtd;
 150
 151         key.imode = imode;
 152         key.omode = omode;
 153         key.mtd   = NULL;
 154
 155         entry = (conv_tp_entry_t*)set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 156         if (! entry->mtd) {
 157                 int n_param = 1, n_res = 1;
 158
 159                 if (imode == env->high_signed || imode == env->high_unsigned)
 160                         n_param = 2;
 161                 if (omode == env->high_signed || omode == env->high_unsigned)
 162                         n_res = 2;
 163
 164                 /* create a new one */
 165                 mtd = new_type_method(n_param, n_res);
 166
 167                 /* set param types and result types */
 168                 n_param = 0;
 169                 if (imode == env->high_signed) {
 170                         set_method_param_type(mtd, n_param++, tp_u);
 171                         set_method_param_type(mtd, n_param++, tp_s);
 172                 } else if (imode == env->high_unsigned) {
 173                         set_method_param_type(mtd, n_param++, tp_u);
 174                         set_method_param_type(mtd, n_param++, tp_u);
 175                 } else {
 176                         ir_type *tp = get_type_for_mode(imode);
 177                         set_method_param_type(mtd, n_param++, tp);
 178                 }
 179
 180                 n_res = 0;
 181                 if (omode == env->high_signed) {
 182                         set_method_res_type(mtd, n_res++, tp_u);
 183                         set_method_res_type(mtd, n_res++, tp_s);
 184                 } else if (omode == env->high_unsigned) {
 185                         set_method_res_type(mtd, n_res++, tp_u);
 186                         set_method_res_type(mtd, n_res++, tp_u);
 187                 } else {
 188                         ir_type *tp = get_type_for_mode(omode);
 189                         set_method_res_type(mtd, n_res++, tp);
 190                 }
 191                 entry->mtd = mtd;
 192         } else {
 193                 mtd = entry->mtd;
 194         }
 195         return mtd;
 196 }
 197
 198 /**
 199  * Add an additional control flow input to a block.
 200  * Patch all Phi nodes. The new Phi inputs are copied from
 201  * old input number nr.
 202  */
 203 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 204 {
 205         int i, arity = get_irn_arity(block);
 206         ir_node **in, *phi;
 207
 208         assert(nr < arity);
 209
 210         NEW_ARR_A(ir_node *, in, arity + 1);
 211         for (i = 0; i < arity; ++i)
 212                 in[i] = get_irn_n(block, i);
 213         in[i] = cf;
 214
 215         set_irn_in(block, i + 1, in);
 216
 217         for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
 218                 for (i = 0; i < arity; ++i)
 219                         in[i] = get_irn_n(phi, i);
 220                 in[i] = in[nr];
 221                 set_irn_in(phi, i + 1, in);
 222         }
 223 }
 224
 225 /**
 226  * Add an additional control flow input to a block.
 227  * Patch all Phi nodes. The new Phi inputs are copied from
 228  * old input from cf tmpl.
 229  */
 230 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 231 {
 232         int i, arity = get_irn_arity(block);
 233         int nr = 0;
 234
 235         for (i = 0; i < arity; ++i) {
 236                 if (get_irn_n(block, i) == tmpl) {
 237                         nr = i;
 238                         break;
 239                 }
 240         }
 241         assert(i < arity);
 242         add_block_cf_input_nr(block, nr, cf);
 243 }
 244
 245 /**
 246  * Return the "operational" mode of a Firm node.
 247  */
 248 static ir_mode *get_irn_op_mode(ir_node *node)
 249 {
 250         switch (get_irn_opcode(node)) {
 251         case iro_Load:
 252                 return get_Load_mode(node);
 253         case iro_Store:
 254                 return get_irn_mode(get_Store_value(node));
 255         case iro_Div:
 256                 return get_irn_mode(get_Div_left(node));
 257         case iro_Mod:
 258                 return get_irn_mode(get_Mod_left(node));
 259         case iro_Cmp:
 260                 return get_irn_mode(get_Cmp_left(node));
 261         default:
 262                 return get_irn_mode(node);
 263         }
 264 }
 265
 266 /**
 267  * Walker, prepare the node links and determine which nodes need to be lowered
 268  * at all.
 269  */
 270 static void prepare_links(lower_env_t *env, ir_node *node)
 271 {
 272         ir_mode      *mode = get_irn_op_mode(node);
 273         node_entry_t *link;
 274         int           i;
 275
 276         if (mode == env->high_signed || mode == env->high_unsigned) {
 277                 unsigned idx = get_irn_idx(node);
 278                 /* ok, found a node that will be lowered */
 279                 link = OALLOCZ(&env->obst, node_entry_t);
 280
 281                 if (idx >= env->n_entries) {
 282                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 283                         unsigned old   = env->n_entries;
 284                         unsigned n_idx = idx + (idx >> 3);
 285
 286                         ARR_RESIZE(node_entry_t *, env->entries, n_idx);
 287                         memset(&env->entries[old], 0, (n_idx - old) * sizeof(env->entries[0]));
 288                         env->n_entries = n_idx;
 289                 }
 290                 env->entries[idx] = link;
 291                 env->flags |= MUST_BE_LOWERED;
 292         } else if (is_Conv(node)) {
 293                 /* Conv nodes have two modes */
 294                 ir_node *pred = get_Conv_op(node);
 295                 mode = get_irn_mode(pred);
 296
 297                 if (mode == env->high_signed || mode == env->high_unsigned) {
 298                         /* must lower this node either but don't need a link */
 299                         env->flags |= MUST_BE_LOWERED;
 300                 }
 301                 return;
 302         }
 303
 304         if (is_Proj(node)) {
 305                 /* link all Proj nodes to its predecessor:
 306                    Note that Tuple Proj's and its Projs are linked either. */
 307                 ir_node *pred = get_Proj_pred(node);
 308
 309                 set_irn_link(node, get_irn_link(pred));
 310                 set_irn_link(pred, node);
 311         } else if (is_Phi(node)) {
 312                 /* link all Phi nodes to its block */
 313                 ir_node *block = get_nodes_block(node);
 314                 add_Block_phi(block, node);
 315         } else if (is_Block(node)) {
 316                 /* fill the Proj -> Block map */
 317                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 318                         ir_node *pred = get_Block_cfgpred(node, i);
 319
 320                         if (is_Proj(pred))
 321                                 pmap_insert(env->proj_2_block, pred, node);
 322                 }
 323         }
 324 }
 325
 326 static node_entry_t *get_node_entry(lower_env_t *env, ir_node *node)
 327 {
 328         unsigned idx = get_irn_idx(node);
 329         assert(idx < env->n_entries);
 330         return env->entries[idx];
 331 }
 332
 333 static void set_lowered(lower_env_t *env, ir_node *old,
 334                         ir_node *new_low, ir_node *new_high)
 335 {
 336         node_entry_t *entry = get_node_entry(env, old);
 337         entry->low_word  = new_low;
 338         entry->high_word = new_high;
 339 }
 340
 341 /**
 342  * Translate a Constant: create two.
 343  */
 344 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env)
 345 {
 346         ir_graph  *irg      = get_irn_irg(node);
 347         dbg_info  *dbg      = get_irn_dbg_info(node);
 348         ir_mode   *low_mode = env->low_unsigned;
 349         ir_tarval *tv       = get_Const_tarval(node);
 350         ir_tarval *tv_l     = tarval_convert_to(tv, low_mode);
 351         ir_node   *res_low  = new_rd_Const(dbg, irg, tv_l);
 352         ir_tarval *tv_shrs  = tarval_shrs(tv, env->tv_mode_bits);
 353         ir_tarval *tv_h     = tarval_convert_to(tv_shrs, mode);
 354         ir_node   *res_high = new_rd_Const(dbg, irg, tv_h);
 355
 356         set_lowered(env, node, res_low, res_high);
 357 }
 358
 359 /**
 360  * Translate a Load: create two.
 361  */
 362 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env)
 363 {
 364         ir_mode    *low_mode = env->low_unsigned;
 365         ir_graph   *irg = get_irn_irg(node);
 366         ir_node    *adr = get_Load_ptr(node);
 367         ir_node    *mem = get_Load_mem(node);
 368         ir_node    *low, *high, *proj;
 369         dbg_info   *dbg;
 370         ir_node    *block = get_nodes_block(node);
 371         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 372                                  ? cons_volatile : cons_none;
 373
 374         if (env->params->little_endian) {
 375                 low  = adr;
 376                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 377         } else {
 378                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 379                 high = adr;
 380         }
 381
 382         /* create two loads */
 383         dbg  = get_irn_dbg_info(node);
 384         low  = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 385         proj = new_r_Proj(low, mode_M, pn_Load_M);
 386         high = new_rd_Load(dbg, block, proj, high, mode, volatility);
 387
 388         set_lowered(env, node, low, high);
 389
 390         for (proj = (ir_node*)get_irn_link(node); proj;
 391              proj = (ir_node*)get_irn_link(proj)) {
 392                 switch (get_Proj_proj(proj)) {
 393                 case pn_Load_M:         /* Memory result. */
 394                         /* put it to the second one */
 395                         set_Proj_pred(proj, high);
 396                         break;
 397                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 398                         /* put it to the first one */
 399                         set_Proj_pred(proj, low);
 400                         break;
 401                 case pn_Load_res: {       /* Result of load operation. */
 402                         ir_node *res_low  = new_r_Proj(low,  low_mode, pn_Load_res);
 403                         ir_node *res_high = new_r_Proj(high, mode,     pn_Load_res);
 404                         set_lowered(env, proj, res_low, res_high);
 405                         break;
 406                 }
 407                 default:
 408                         assert(0 && "unexpected Proj number");
 409                 }
 410                 /* mark this proj: we have handled it already, otherwise we might fall
 411                  * into out new nodes. */
 412                 mark_irn_visited(proj);
 413         }
 414 }
 415
 416 /**
 417  * Translate a Store: create two.
 418  */
 419 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env)
 420 {
 421         ir_graph     *irg;
 422         ir_node      *block, *adr, *mem;
 423         ir_node      *low, *high, *proj;
 424         dbg_info     *dbg;
 425         ir_node            *value = get_Store_value(node);
 426         const node_entry_t *entry = get_node_entry(env, value);
 427         ir_cons_flags volatility = get_Store_volatility(node) == volatility_is_volatile
 428                                    ? cons_volatile : cons_none;
 429         (void) mode;
 430
 431         assert(entry);
 432
 433         if (! entry->low_word) {
 434                 /* not ready yet, wait */
 435                 pdeq_putr(env->waitq, node);
 436                 return;
 437         }
 438
 439         irg = get_irn_irg(node);
 440         adr = get_Store_ptr(node);
 441         mem = get_Store_mem(node);
 442         block = get_nodes_block(node);
 443
 444         if (env->params->little_endian) {
 445                 low  = adr;
 446                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 447         } else {
 448                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 449                 high = adr;
 450         }
 451
 452         /* create two Stores */
 453         dbg = get_irn_dbg_info(node);
 454         low  = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 455         proj = new_r_Proj(low, mode_M, pn_Store_M);
 456         high = new_rd_Store(dbg, block, proj, high, entry->high_word, volatility);
 457
 458         set_lowered(env, node, low, high);
 459
 460         for (proj = (ir_node*)get_irn_link(node); proj;
 461              proj = (ir_node*)get_irn_link(proj)) {
 462                 switch (get_Proj_proj(proj)) {
 463                 case pn_Store_M:         /* Memory result. */
 464                         /* put it to the second one */
 465                         set_Proj_pred(proj, high);
 466                         break;
 467                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 468                         /* put it to the first one */
 469                         set_Proj_pred(proj, low);
 470                         break;
 471                 default:
 472                         assert(0 && "unexpected Proj number");
 473                 }
 474                 /* mark this proj: we have handled it already, otherwise we might fall into
 475                  * out new nodes. */
 476                 mark_irn_visited(proj);
 477         }
 478 }
 479
 480 /**
 481  * Return a node containing the address of the intrinsic emulation function.
 482  *
 483  * @param method  the method type of the emulation function
 484  * @param op      the emulated ir_op
 485  * @param imode   the input mode of the emulated opcode
 486  * @param omode   the output mode of the emulated opcode
 487  * @param env     the lower environment
 488  */
 489 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 490                                       ir_mode *imode, ir_mode *omode,
 491                                       lower_env_t *env)
 492 {
 493         symconst_symbol sym;
 494         ir_entity *ent;
 495         op_mode_entry_t key, *entry;
 496
 497         key.op    = op;
 498         key.imode = imode;
 499         key.omode = omode;
 500         key.ent   = NULL;
 501
 502         entry = (op_mode_entry_t*)set_insert(intrinsic_fkt, &key, sizeof(key),
 503                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 504         if (! entry->ent) {
 505                 /* create a new one */
 506                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 507
 508                 assert(ent && "Intrinsic creator must return an entity");
 509                 entry->ent = ent;
 510         } else {
 511                 ent = entry->ent;
 512         }
 513         sym.entity_p = ent;
 514         return new_r_SymConst(env->irg, mode_P_code, sym, symconst_addr_ent);
 515 }
 516
 517 /**
 518  * Translate a Div.
 519  *
 520  * Create an intrinsic Call.
 521  */
 522 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env)
 523 {
 524         ir_node            *left        = get_Div_left(node);
 525         ir_node            *right       = get_Div_right(node);
 526         const node_entry_t *left_entry  = get_node_entry(env, left);
 527         const node_entry_t *right_entry = get_node_entry(env, right);
 528         ir_node            *block       = get_nodes_block(node);
 529         dbg_info           *dbgi        = get_irn_dbg_info(node);
 530         ir_type            *mtp
 531                 = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 532         ir_mode            *opmode = get_irn_op_mode(node);
 533         ir_node            *addr
 534                 = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 535         ir_node  *in[4] = {
 536                 left_entry->low_word, left_entry->high_word,
 537                 right_entry->low_word, right_entry->high_word };
 538         ir_node            *call
 539                 = new_rd_Call(dbgi, block, get_Div_mem(node), addr, 4, in, mtp);
 540         ir_node            *resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
 541         ir_node            *proj;
 542
 543         set_irn_pinned(call, get_irn_pinned(node));
 544
 545         for (proj = (ir_node*)get_irn_link(node); proj;
 546              proj = (ir_node*)get_irn_link(proj)) {
 547                 switch (get_Proj_proj(proj)) {
 548                 case pn_Div_M:         /* Memory result. */
 549                         /* reroute to the call */
 550                         set_Proj_pred(proj, call);
 551                         set_Proj_proj(proj, pn_Call_M);
 552                         break;
 553                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 554                         /* reroute to the call */
 555                         set_Proj_pred(proj, call);
 556                         set_Proj_proj(proj, pn_Call_X_except);
 557                         break;
 558                 case pn_Div_res: {
 559                         /* Result of computation. */
 560                         ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 561                         ir_node *res_high = new_r_Proj(resproj, mode,              1);
 562                         set_lowered(env, proj, res_low, res_high);
 563                         break;
 564                 }
 565                 default:
 566                         assert(0 && "unexpected Proj number");
 567                 }
 568                 /* mark this proj: we have handled it already, otherwise we might fall into
 569                  * out new nodes. */
 570                 mark_irn_visited(proj);
 571         }
 572 }
 573
 574 /**
 575  * Translate a Mod.
 576  *
 577  * Create an intrinsic Call.
 578  */
 579 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env)
 580 {
 581         ir_node            *left        = get_Mod_left(node);
 582         ir_node            *right       = get_Mod_right(node);
 583         const node_entry_t *left_entry  = get_node_entry(env, left);
 584         const node_entry_t *right_entry = get_node_entry(env, right);
 585         ir_node            *in[4]       = {
 586                 left_entry->low_word, left_entry->high_word,
 587                 right_entry->low_word, right_entry->high_word
 588         };
 589         dbg_info           *dbgi        = get_irn_dbg_info(node);
 590         ir_node            *block       = get_nodes_block(node);
 591         ir_type            *mtp
 592                 = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 593         ir_mode            *opmode = get_irn_op_mode(node);
 594         ir_node            *addr
 595                 = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 596         ir_node            *call
 597                 = new_rd_Call(dbgi, block, get_Mod_mem(node), addr, 4, in, mtp);
 598         ir_node            *resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
 599         ir_node            *proj;
 600         set_irn_pinned(call, get_irn_pinned(node));
 601
 602         for (proj = (ir_node*)get_irn_link(node); proj;
 603              proj = (ir_node*)get_irn_link(proj)) {
 604                 switch (get_Proj_proj(proj)) {
 605                 case pn_Mod_M:         /* Memory result. */
 606                         /* reroute to the call */
 607                         set_Proj_pred(proj, call);
 608                         set_Proj_proj(proj, pn_Call_M);
 609                         break;
 610                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 611                         /* reroute to the call */
 612                         set_Proj_pred(proj, call);
 613                         set_Proj_proj(proj, pn_Call_X_except);
 614                         break;
 615                 case pn_Mod_res: {
 616                         /* Result of computation. */
 617                         ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 618                         ir_node *res_high = new_r_Proj(resproj, mode,              1);
 619                         set_lowered(env, proj, res_low, res_high);
 620                         break;
 621                 }
 622                 default:
 623                         assert(0 && "unexpected Proj number");
 624                 }
 625                 /* mark this proj: we have handled it already, otherwise we might fall
 626                  * into out new nodes. */
 627                 mark_irn_visited(proj);
 628         }
 629 }
 630
 631 /**
 632  * Translate a binop.
 633  *
 634  * Create an intrinsic Call.
 635  */
 636 static void lower_binop(ir_node *node, ir_mode *mode, lower_env_t *env)
 637 {
 638         ir_node            *left        = get_binop_left(node);
 639         ir_node            *right       = get_binop_right(node);
 640         const node_entry_t *left_entry  = get_node_entry(env, left);
 641         const node_entry_t *right_entry = get_node_entry(env, right);
 642         ir_node            *in[4]       = {
 643                 left_entry->low_word, left_entry->high_word,
 644                 right_entry->low_word, right_entry->high_word
 645         };
 646         dbg_info           *dbgi        = get_irn_dbg_info(node);
 647         ir_node            *block       = get_nodes_block(node);
 648         ir_graph           *irg         = get_irn_irg(block);
 649         ir_type            *mtp
 650                 = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 651         ir_node            *addr
 652                 = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 653         ir_node            *call
 654                 = new_rd_Call(dbgi, block, get_irg_no_mem(irg), addr, 4, in, mtp);
 655         ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
 656         ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 657         ir_node            *res_high = new_r_Proj(resproj, mode,              1);
 658         set_irn_pinned(call, get_irn_pinned(node));
 659         set_lowered(env, node, res_low, res_high);
 660 }
 661
 662 /**
 663  * Translate a Shiftop.
 664  *
 665  * Create an intrinsic Call.
 666  */
 667 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env)
 668 {
 669         ir_node            *block      = get_nodes_block(node);
 670         ir_node            *left       = get_binop_left(node);
 671         const node_entry_t *left_entry = get_node_entry(env, left);
 672         ir_node            *right      = get_binop_right(node);
 673         ir_node            *in[3]      = {
 674                 left_entry->low_word, left_entry->high_word,
 675                 /* it should be safe to conv to low_unsigned */
 676                 new_r_Conv(block, right, env->low_unsigned)
 677         };
 678         dbg_info           *dbgi       = get_irn_dbg_info(node);
 679         ir_graph           *irg        = get_irn_irg(block);
 680         ir_type            *mtp
 681                 = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 682         ir_node            *addr
 683                 = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 684         ir_node            *call
 685                 = new_rd_Call(dbgi, block, get_irg_no_mem(irg), addr, 3, in, mtp);
 686         ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
 687         ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 688         ir_node            *res_high = new_r_Proj(resproj, mode,              1);
 689
 690         set_irn_pinned(call, get_irn_pinned(node));
 691         set_lowered(env, node, res_low, res_high);
 692 }
 693
 694 /**
 695  * Translate a Shr and handle special cases.
 696  */
 697 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env)
 698 {
 699         ir_graph *irg   = get_irn_irg(node);
 700         ir_node  *right = get_Shr_right(node);
 701
 702         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 703                 ir_tarval *tv = get_Const_tarval(right);
 704
 705                 if (tarval_is_long(tv) &&
 706                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 707                         ir_node *block        = get_nodes_block(node);
 708                         ir_node *left         = get_Shr_left(node);
 709                         ir_mode *low_unsigned = env->low_unsigned;
 710                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 711                         const node_entry_t *left_entry = get_node_entry(env, left);
 712                         ir_node *res_low;
 713                         ir_node *res_high;
 714
 715                         left = left_entry->high_word;
 716
 717                         /* convert high word into low_unsigned mode if necessary */
 718                         if (get_irn_mode(left) != low_unsigned)
 719                                 left = new_r_Conv(block, left, low_unsigned);
 720
 721                         if (shf_cnt > 0) {
 722                                 ir_node *c = new_r_Const_long(irg, low_unsigned, shf_cnt);
 723                                 res_low = new_r_Shr(block, left, c, low_unsigned);
 724                         } else {
 725                                 res_low = left;
 726                         }
 727                         res_high = new_r_Const(irg, get_mode_null(mode));
 728                         set_lowered(env, node, res_low, res_high);
 729
 730                         return;
 731                 }
 732         }
 733         lower_Shiftop(node, mode, env);
 734 }
 735
 736 /**
 737  * Translate a Shl and handle special cases.
 738  */
 739 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env)
 740 {
 741         ir_graph *irg   = get_irn_irg(node);
 742         ir_node  *right = get_Shl_right(node);
 743
 744         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 745                 ir_tarval *tv = get_Const_tarval(right);
 746
 747                 if (tarval_is_long(tv)) {
 748                         long value = get_tarval_long(tv);
 749                     if (value >= (long)get_mode_size_bits(mode)) {
 750                                 /* simple case: shift above the lower word */
 751                                 ir_mode *mode_l;
 752                                 ir_node *block = get_nodes_block(node);
 753                                 ir_node *left = get_Shl_left(node);
 754                                 ir_node *c;
 755                                 long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 756                                 const node_entry_t *left_entry = get_node_entry(env, left);
 757                                 ir_node  *res_low;
 758                                 ir_node  *res_high;
 759
 760                                 left = left_entry->low_word;
 761                                 left = new_r_Conv(block, left, mode);
 762
 763                                 mode_l = env->low_unsigned;
 764                                 if (shf_cnt > 0) {
 765                                         c        = new_r_Const_long(irg, mode_l, shf_cnt);
 766                                         res_high = new_r_Shl(block, left, c, mode);
 767                                 } else {
 768                                         res_high = left;
 769                                 }
 770                                 res_low = new_r_Const(irg, get_mode_null(mode_l));
 771                                 set_lowered(env, node, res_low, res_high);
 772
 773                                 return;
 774                         }
 775                         if (value == 1) {
 776                                 /* left << 1 == left + left */
 777                                 ir_node            *left        = get_binop_left(node);
 778                                 const node_entry_t *left_entry  = get_node_entry(env, left);
 779                                 ir_node            *in[4]       = {
 780                                         left_entry->low_word, left_entry->high_word,
 781                                         left_entry->low_word, left_entry->high_word,
 782                                 };
 783                                 dbg_info           *dbgi        = get_irn_dbg_info(node);
 784                                 ir_node            *block       = get_nodes_block(node);
 785                                 ir_graph           *irg         = get_irn_irg(block);
 786                                 ir_type            *mtp
 787                                         = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 788                                 ir_node            *addr
 789                                         = get_intrinsic_address(mtp, op_Add, mode, mode, env);
 790                                 ir_node            *call
 791                                         = new_rd_Call(dbgi, block, get_irg_no_mem(irg), addr, 4, in, mtp);
 792                                 ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
 793                                 ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 794                                 ir_node            *res_high = new_r_Proj(resproj, mode,              1);
 795                                 set_irn_pinned(call, get_irn_pinned(node));
 796                                 set_lowered(env, node, res_low, res_high);
 797
 798                                 return;
 799                         }
 800                 }
 801         }
 802         lower_Shiftop(node, mode, env);
 803 }
 804
 805 /**
 806  * Translate a Shrs and handle special cases.
 807  */
 808 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env)
 809 {
 810         ir_graph *irg   = get_irn_irg(node);
 811         ir_node  *right = get_Shrs_right(node);
 812
 813         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 814                 ir_tarval *tv = get_Const_tarval(right);
 815
 816                 if (tarval_is_long(tv) &&
 817                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 818                         ir_node *block         = get_nodes_block(node);
 819                         ir_node *left          = get_Shrs_left(node);
 820                         ir_mode *low_unsigned  = env->low_unsigned;
 821                         long     shf_cnt       = get_tarval_long(tv) - get_mode_size_bits(mode);
 822                         const node_entry_t *left_entry = get_node_entry(env, left);
 823                         ir_node *left_unsigned = left;
 824                         ir_node *res_low;
 825                         ir_node *res_high;
 826                         ir_node *c;
 827
 828                         left = left_entry->high_word;
 829
 830                         /* convert high word into low_unsigned mode if necessary */
 831                         if (get_irn_mode(left_unsigned) != low_unsigned)
 832                                 left_unsigned = new_r_Conv(block, left, low_unsigned);
 833
 834                         if (shf_cnt > 0) {
 835                                 c       = new_r_Const_long(irg, low_unsigned, shf_cnt);
 836                                 res_low = new_r_Shrs(block, left_unsigned, c, low_unsigned);
 837                         } else {
 838                                 res_low = left_unsigned;
 839                         }
 840
 841                         c        = new_r_Const(irg, get_mode_all_one(low_unsigned));
 842                         res_high = new_r_Shrs(block, left, c, mode);
 843                         set_lowered(env, node, res_low, res_high);
 844                         return;
 845                 }
 846         }
 847         lower_Shiftop(node, mode, env);
 848 }
 849
 850 /**
 851  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
 852  */
 853 static void prepare_links_and_handle_rotl(ir_node *node, void *env)
 854 {
 855         lower_env_t *lenv = (lower_env_t*)env;
 856
 857         if (is_Rotl(node)) {
 858                 ir_mode  *mode = get_irn_op_mode(node);
 859                 ir_node  *right;
 860                 ir_node  *left, *shl, *shr, *ornode, *block, *sub, *c;
 861                 ir_mode  *omode, *rmode;
 862                 ir_graph *irg;
 863                 dbg_info *dbg;
 864                 optimization_state_t state;
 865
 866                 if (mode != lenv->high_signed && mode != lenv->high_unsigned) {
 867                         prepare_links(lenv, node);
 868                         return;
 869                 }
 870
 871                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) */
 872                 right = get_Rotl_right(node);
 873                 irg   = get_irn_irg(node);
 874                 dbg   = get_irn_dbg_info(node);
 875                 omode = get_irn_mode(node);
 876                 left  = get_Rotl_left(node);
 877                 block = get_nodes_block(node);
 878                 shl   = new_rd_Shl(dbg, block, left, right, omode);
 879                 rmode = get_irn_mode(right);
 880                 c     = new_r_Const_long(irg, rmode, get_mode_size_bits(omode));
 881                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
 882                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
 883
 884                 /* switch optimization off here, or we will get the Rotl back */
 885                 save_optimization_state(&state);
 886                 set_opt_algebraic_simplification(0);
 887                 ornode = new_rd_Or(dbg, block, shl, shr, omode);
 888                 restore_optimization_state(&state);
 889
 890                 exchange(node, ornode);
 891
 892                 /* do lowering on the new nodes */
 893                 prepare_links(lenv, shl);
 894                 prepare_links(lenv, c);
 895                 prepare_links(lenv, sub);
 896                 prepare_links(lenv, shr);
 897                 prepare_links(lenv, ornode);
 898                 return;
 899         }
 900
 901         prepare_links(lenv, node);
 902 }
 903
 904 /**
 905  * Translate an Unop.
 906  *
 907  * Create an intrinsic Call.
 908  */
 909 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env)
 910 {
 911         ir_node            *op       = get_unop_op(node);
 912         const node_entry_t *op_entry = get_node_entry(env, op);
 913         ir_node            *in[2]    = { op_entry->low_word, op_entry->high_word };
 914         dbg_info           *dbgi     = get_irn_dbg_info(node);
 915         ir_node            *block    = get_nodes_block(node);
 916         ir_graph           *irg      = get_irn_irg(block);
 917         ir_type            *mtp      = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
 918         ir_op              *irop     = get_irn_op(node);
 919         ir_node            *addr     = get_intrinsic_address(mtp, irop, mode, mode, env);
 920         ir_node            *nomem    = get_irg_no_mem(irg);
 921         ir_node            *call     = new_rd_Call(dbgi, block, nomem, addr, 2, in, mtp);
 922         ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
 923         ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 924         ir_node            *res_high = new_r_Proj(resproj, mode,              1);
 925         set_irn_pinned(call, get_irn_pinned(node));
 926         set_lowered(env, node, res_low, res_high);
 927 }
 928
 929 /**
 930  * Translate a logical binop.
 931  *
 932  * Create two logical binops.
 933  */
 934 static void lower_binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
 935                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) )
 936 {
 937         ir_node            *left        = get_binop_left(node);
 938         ir_node            *right       = get_binop_right(node);
 939         const node_entry_t *left_entry  = get_node_entry(env, left);
 940         const node_entry_t *right_entry = get_node_entry(env, right);
 941         dbg_info           *dbgi        = get_irn_dbg_info(node);
 942         ir_node            *block       = get_nodes_block(node);
 943         ir_node            *res_low
 944                 = constr_rd(dbgi, block, left_entry->low_word, right_entry->low_word,
 945                             env->low_unsigned);
 946         ir_node            *res_high
 947                 = constr_rd(dbgi, block, left_entry->high_word, right_entry->high_word,
 948                             mode);
 949         set_lowered(env, node, res_low, res_high);
 950 }
 951
 952 static void lower_And(ir_node *node, ir_mode *mode, lower_env_t *env)
 953 {
 954         lower_binop_logical(node, mode, env, new_rd_And);
 955 }
 956
 957 static void lower_Or(ir_node *node, ir_mode *mode, lower_env_t *env)
 958 {
 959         lower_binop_logical(node, mode, env, new_rd_Or);
 960 }
 961
 962 static void lower_Eor(ir_node *node, ir_mode *mode, lower_env_t *env)
 963 {
 964         lower_binop_logical(node, mode, env, new_rd_Eor);
 965 }
 966
 967 /**
 968  * Translate a Not.
 969  *
 970  * Create two logical Nots.
 971  */
 972 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env)
 973 {
 974         ir_node            *op       = get_Not_op(node);
 975         const node_entry_t *op_entry = get_node_entry(env, op);
 976         dbg_info           *dbgi     = get_irn_dbg_info(node);
 977         ir_node            *block    = get_nodes_block(node);
 978         ir_node            *res_low
 979                 = new_rd_Not(dbgi, block, op_entry->low_word, env->low_unsigned);
 980         ir_node            *res_high
 981                 = new_rd_Not(dbgi, block, op_entry->high_word, mode);
 982         set_lowered(env, node, res_low, res_high);
 983 }
 984
 985 /**
 986  * Translate a Cond.
 987  */
 988 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env)
 989 {
 990         ir_node *left, *right, *block;
 991         ir_node *sel = get_Cond_selector(node);
 992         ir_mode *m = get_irn_mode(sel);
 993         ir_mode *cmp_mode;
 994         const node_entry_t *lentry, *rentry;
 995         ir_node  *proj, *projT = NULL, *projF = NULL;
 996         ir_node  *new_bl, *irn;
 997         ir_node  *projHF, *projHT;
 998         ir_node  *dst_blk;
 999         ir_relation relation;
1000         ir_graph *irg;
1001         dbg_info *dbg;
1002
1003         (void) mode;
1004
1005         if (m != mode_b) {
1006                 if (m == env->high_signed || m == env->high_unsigned) {
1007                         /* bad we can't really handle Switch with 64bit offsets */
1008                         panic("Cond with 64bit jumptable not supported");
1009                 }
1010                 lower_node(env, sel);
1011                 return;
1012         }
1013
1014         if (!is_Cmp(sel)) {
1015                 lower_node(env, sel);
1016                 return;
1017         }
1018
1019         left     = get_Cmp_left(sel);
1020         cmp_mode = get_irn_mode(left);
1021         if (cmp_mode != env->high_signed && cmp_mode != env->high_unsigned) {
1022                 lower_node(env, sel);
1023                 return;
1024         }
1025
1026         right  = get_Cmp_right(sel);
1027         lower_node(env, left);
1028         lower_node(env, right);
1029         lentry = get_node_entry(env, left);
1030         rentry = get_node_entry(env, right);
1031
1032         /* all right, build the code */
1033         for (proj = (ir_node*)get_irn_link(node); proj;
1034              proj = (ir_node*)get_irn_link(proj)) {
1035                 long proj_nr = get_Proj_proj(proj);
1036
1037                 if (proj_nr == pn_Cond_true) {
1038                         assert(projT == NULL && "more than one Proj(true)");
1039                         projT = proj;
1040                 } else {
1041                         assert(proj_nr == pn_Cond_false);
1042                         assert(projF == NULL && "more than one Proj(false)");
1043                         projF = proj;
1044                 }
1045                 mark_irn_visited(proj);
1046         }
1047         assert(projT && projF);
1048
1049         /* create a new high compare */
1050         block    = get_nodes_block(node);
1051         irg      = get_Block_irg(block);
1052         dbg      = get_irn_dbg_info(sel);
1053         relation = get_Cmp_relation(sel);
1054
1055         if (ir_is_equality_cmp_0(sel)) {
1056                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1057                 ir_mode *mode   = env->low_unsigned;
1058                 ir_node *low    = new_r_Conv(block, lentry->low_word, mode);
1059                 ir_node *high   = new_r_Conv(block, lentry->high_word, mode);
1060                 ir_node *ornode = new_rd_Or(dbg, block, low, high, mode);
1061                 ir_node *cmp    = new_rd_Cmp(dbg, block, ornode, new_r_Const_long(irg, mode, 0), relation);
1062                 set_Cond_selector(node, cmp);
1063                 return;
1064         }
1065
1066         if (relation == ir_relation_equal) {
1067                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1068                 pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1069
1070                 assert(entry);
1071                 dst_blk = (ir_node*)entry->value;
1072
1073                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1074                                  ir_relation_equal);
1075                 dbg = get_irn_dbg_info(node);
1076                 irn = new_rd_Cond(dbg, block, irn);
1077
1078                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1079                 mark_irn_visited(projHF);
1080                 exchange(projF, projHF);
1081
1082                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1083                 mark_irn_visited(projHT);
1084
1085                 new_bl = new_r_Block(irg, 1, &projHT);
1086
1087                 dbg = get_irn_dbg_info(sel);
1088                 irn = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word,
1089                                   ir_relation_equal);
1090                 dbg = get_irn_dbg_info(node);
1091                 irn = new_rd_Cond(dbg, new_bl, irn);
1092
1093                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1094                 mark_irn_visited(proj);
1095                 add_block_cf_input(dst_blk, projHF, proj);
1096
1097                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1098                 mark_irn_visited(proj);
1099                 exchange(projT, proj);
1100         } else if (relation == ir_relation_less_greater) {
1101                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1102                 pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1103
1104                 assert(entry);
1105                 dst_blk = (ir_node*)entry->value;
1106
1107                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1108                                  ir_relation_less_greater);
1109                 dbg = get_irn_dbg_info(node);
1110                 irn = new_rd_Cond(dbg, block, irn);
1111
1112                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1113                 mark_irn_visited(projHT);
1114                 exchange(projT, projHT);
1115
1116                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1117                 mark_irn_visited(projHF);
1118
1119                 new_bl = new_r_Block(irg, 1, &projHF);
1120
1121                 dbg = get_irn_dbg_info(sel);
1122                 irn = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word,
1123                                  ir_relation_less_greater);
1124                 dbg = get_irn_dbg_info(node);
1125                 irn = new_rd_Cond(dbg, new_bl, irn);
1126
1127                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1128                 mark_irn_visited(proj);
1129                 add_block_cf_input(dst_blk, projHT, proj);
1130
1131                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1132                 mark_irn_visited(proj);
1133                 exchange(projF, proj);
1134         } else {
1135                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1136                 ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1137                 pmap_entry *entry;
1138
1139                 entry = pmap_find(env->proj_2_block, projT);
1140                 assert(entry);
1141                 dstT = (ir_node*)entry->value;
1142
1143                 entry = pmap_find(env->proj_2_block, projF);
1144                 assert(entry);
1145                 dstF = (ir_node*)entry->value;
1146
1147                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1148                                  relation & ~ir_relation_equal);
1149                 dbg = get_irn_dbg_info(node);
1150                 irn = new_rd_Cond(dbg, block, irn);
1151
1152                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1153                 mark_irn_visited(projHT);
1154                 exchange(projT, projHT);
1155                 projT = projHT;
1156
1157                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1158                 mark_irn_visited(projHF);
1159
1160                 newbl_eq = new_r_Block(irg, 1, &projHF);
1161
1162                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1163                                  ir_relation_equal);
1164                 irn = new_rd_Cond(dbg, newbl_eq, irn);
1165
1166                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1167                 mark_irn_visited(proj);
1168                 exchange(projF, proj);
1169                 projF = proj;
1170
1171                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1172                 mark_irn_visited(proj);
1173
1174                 newbl_l = new_r_Block(irg, 1, &proj);
1175
1176                 dbg = get_irn_dbg_info(sel);
1177                 irn = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word,
1178                                  relation);
1179                 dbg = get_irn_dbg_info(node);
1180                 irn = new_rd_Cond(dbg, newbl_l, irn);
1181
1182                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1183                 mark_irn_visited(proj);
1184                 add_block_cf_input(dstT, projT, proj);
1185
1186                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1187                 mark_irn_visited(proj);
1188                 add_block_cf_input(dstF, projF, proj);
1189         }
1190
1191         /* we have changed the control flow */
1192         env->flags |= CF_CHANGED;
1193 }
1194
1195 /**
1196  * Translate a Conv to higher_signed
1197  */
1198 static void lower_Conv_to_Ll(ir_node *node, lower_env_t *env)
1199 {
1200         ir_mode  *omode        = get_irn_mode(node);
1201         ir_node  *op           = get_Conv_op(node);
1202         ir_mode  *imode        = get_irn_mode(op);
1203         ir_graph *irg          = get_irn_irg(node);
1204         ir_node  *block        = get_nodes_block(node);
1205         dbg_info *dbg          = get_irn_dbg_info(node);
1206         ir_node  *res_low;
1207         ir_node  *res_high;
1208
1209         ir_mode  *low_unsigned = env->low_unsigned;
1210         ir_mode  *low_signed
1211                 = mode_is_signed(omode) ? env->low_signed : low_unsigned;
1212
1213         if (mode_is_int(imode) || mode_is_reference(imode)) {
1214                 if (imode == env->high_signed || imode == env->high_unsigned) {
1215                         /* a Conv from Lu to Ls or Ls to Lu */
1216                         const node_entry_t *op_entry = get_node_entry(env, op);
1217                         res_low  = op_entry->low_word;
1218                         res_high = new_rd_Conv(dbg, block, op_entry->high_word, low_signed);
1219                 } else {
1220                         /* simple case: create a high word */
1221                         if (imode != low_unsigned)
1222                                 op = new_rd_Conv(dbg, block, op, low_unsigned);
1223
1224                         res_low = op;
1225
1226                         if (mode_is_signed(imode)) {
1227                                 int      c       = get_mode_size_bits(low_signed) - 1;
1228                                 ir_node *cnst    = new_r_Const_long(irg, low_unsigned, c);
1229                                 if (get_irn_mode(op) != low_signed)
1230                                         op = new_rd_Conv(dbg, block, op, low_signed);
1231                                 res_high = new_rd_Shrs(dbg, block, op, cnst, low_signed);
1232                         } else {
1233                                 res_high = new_r_Const(irg, get_mode_null(low_signed));
1234                         }
1235                 }
1236         } else if (imode == mode_b) {
1237                 res_low  = new_rd_Conv(dbg, block, op, low_unsigned);
1238                 res_high = new_r_Const(irg, get_mode_null(low_signed));
1239         } else {
1240                 ir_node *irn, *call;
1241                 ir_type *mtp = get_conv_type(imode, omode, env);
1242
1243                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1244                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1245                 set_irn_pinned(call, get_irn_pinned(node));
1246                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1247
1248                 res_low  = new_r_Proj(irn, low_unsigned, 0);
1249                 res_high = new_r_Proj(irn, low_signed, 1);
1250         }
1251         set_lowered(env, node, res_low, res_high);
1252 }
1253
1254 /**
1255  * Translate a Conv from higher_unsigned
1256  */
1257 static void lower_Conv_from_Ll(ir_node *node, lower_env_t *env)
1258 {
1259         ir_node            *op    = get_Conv_op(node);
1260         ir_mode            *omode = get_irn_mode(node);
1261         ir_node            *block = get_nodes_block(node);
1262         dbg_info           *dbg   = get_irn_dbg_info(node);
1263         ir_graph           *irg   = get_irn_irg(node);
1264         const node_entry_t *entry = get_node_entry(env, op);
1265
1266         if (mode_is_int(omode) || mode_is_reference(omode)) {
1267                 op = entry->low_word;
1268
1269                 /* simple case: create a high word */
1270                 if (omode != env->low_unsigned)
1271                         op = new_rd_Conv(dbg, block, op, omode);
1272
1273                 set_Conv_op(node, op);
1274         } else if (omode == mode_b) {
1275                 /* llu ? true : false  <=> (low|high) ? true : false */
1276                 ir_mode *mode   = env->low_unsigned;
1277                 ir_node *ornode = new_rd_Or(dbg, block, entry->low_word,
1278                                             entry->high_word, mode);
1279                 set_Conv_op(node, ornode);
1280         } else {
1281                 ir_node *irn, *call, *in[2];
1282                 ir_mode *imode = get_irn_mode(op);
1283                 ir_type *mtp   = get_conv_type(imode, omode, env);
1284
1285                 irn   = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1286                 in[0] = entry->low_word;
1287                 in[1] = entry->high_word;
1288
1289                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1290                 set_irn_pinned(call, get_irn_pinned(node));
1291                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1292
1293                 exchange(node, new_r_Proj(irn, omode, 0));
1294         }
1295 }
1296
1297 /**
1298  * lower Cmp
1299  */
1300 static void lower_Cmp(ir_node *cmp, ir_mode *m, lower_env_t *env)
1301 {
1302         ir_node  *l    = get_Cmp_left(cmp);
1303         ir_mode  *mode = get_irn_mode(l);
1304         ir_node  *r, *low, *high, *t, *res;
1305         ir_relation relation;
1306         ir_node  *block;
1307         dbg_info *dbg;
1308         const node_entry_t *lentry;
1309         const node_entry_t *rentry;
1310         (void) m;
1311
1312         if (mode != env->high_signed && mode != env->high_unsigned)
1313                 return;
1314
1315         r        = get_Cmp_right(cmp);
1316         lentry   = get_node_entry(env, l);
1317         rentry   = get_node_entry(env, r);
1318         relation = get_Cmp_relation(cmp);
1319         block    = get_nodes_block(cmp);
1320         dbg      = get_irn_dbg_info(cmp);
1321
1322         /* easy case for x ==/!= 0 (see lower_Cond for details) */
1323         if (ir_is_equality_cmp_0(cmp)) {
1324                 ir_graph *irg     = get_irn_irg(cmp);
1325                 ir_mode  *mode    = env->low_unsigned;
1326                 ir_node  *low     = new_r_Conv(block, lentry->low_word, mode);
1327                 ir_node  *high    = new_r_Conv(block, lentry->high_word, mode);
1328                 ir_node  *ornode  = new_rd_Or(dbg, block, low, high, mode);
1329                 ir_node  *new_cmp = new_rd_Cmp(dbg, block, ornode, new_r_Const_long(irg, mode, 0), relation);
1330                 exchange(cmp, new_cmp);
1331                 return;
1332         }
1333
1334         if (relation == ir_relation_equal) {
1335                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1336                 low  = new_rd_Cmp(dbg, block, lentry->low_word, rentry->low_word,
1337                                   relation);
1338                 high = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1339                                   relation);
1340                 res  = new_rd_And(dbg, block, low, high, mode_b);
1341         } else if (relation == ir_relation_less_greater) {
1342                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1343                 low  = new_rd_Cmp(dbg, block, lentry->low_word, rentry->low_word,
1344                                   relation);
1345                 high = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1346                                   relation);
1347                 res = new_rd_Or(dbg, block, low, high, mode_b);
1348         } else {
1349                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1350                 ir_node *high1 = new_rd_Cmp(dbg, block, lentry->high_word,
1351                         rentry->high_word, relation & ~ir_relation_equal);
1352                 low  = new_rd_Cmp(dbg, block, lentry->low_word, rentry->low_word,
1353                                   relation);
1354                 high = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1355                                   ir_relation_equal);
1356                 t = new_rd_And(dbg, block, low, high, mode_b);
1357                 res = new_rd_Or(dbg, block, high1, t, mode_b);
1358         }
1359         exchange(cmp, res);
1360 }
1361
1362 /**
1363  * Translate a Conv.
1364  */
1365 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env)
1366 {
1367         mode = get_irn_mode(node);
1368
1369         if (mode == env->high_signed || mode == env->high_unsigned) {
1370                 lower_Conv_to_Ll(node, env);
1371         } else {
1372                 ir_mode *op_mode = get_irn_mode(get_Conv_op(node));
1373
1374                 if (op_mode == env->high_signed || op_mode == env->high_unsigned) {
1375                         lower_Conv_from_Ll(node, env);
1376                 }
1377         }
1378 }
1379
1380 /**
1381  * Remember the new argument index of this value type entity in the lowered
1382  * method type.
1383  *
1384  * @param ent  the entity
1385  * @param pos  the argument index of this entity
1386  */
1387 static inline void set_entity_arg_idx(ir_entity *ent, size_t pos)
1388 {
1389         set_entity_link(ent, INT_TO_PTR(pos));
1390 }
1391
1392 /**
1393  * Retrieve the argument index of a value type entity.
1394  *
1395  * @param ent  the entity
1396  */
1397 static size_t get_entity_arg_idx(const ir_entity *ent) {
1398         return PTR_TO_INT(get_entity_link(ent));
1399 }
1400
1401 /**
1402  * Lower the method type.
1403  *
1404  * @param env  the lower environment
1405  * @param mtp  the method type to lower
1406  *
1407  * @return the lowered type
1408  */
1409 static ir_type *lower_mtp(lower_env_t *env, ir_type *mtp)
1410 {
1411         pmap_entry *entry;
1412         ident      *lid;
1413         ir_type    *res, *value_type;
1414
1415         if (is_lowered_type(mtp))
1416                 return mtp;
1417
1418         entry = pmap_find(lowered_type, mtp);
1419         if (! entry) {
1420                 size_t i, orig_n_params, orig_n_res, n_param, n_res;
1421
1422                 /* count new number of params */
1423                 n_param = orig_n_params = get_method_n_params(mtp);
1424                 for (i = orig_n_params; i > 0;) {
1425                         ir_type *tp = get_method_param_type(mtp, --i);
1426
1427                         if (is_Primitive_type(tp)) {
1428                                 ir_mode *mode = get_type_mode(tp);
1429
1430                                 if (mode == env->high_signed ||
1431                                         mode == env->high_unsigned)
1432                                         ++n_param;
1433                         }
1434                 }
1435
1436                 /* count new number of results */
1437                 n_res = orig_n_res = get_method_n_ress(mtp);
1438                 for (i = orig_n_res; i > 0;) {
1439                         ir_type *tp = get_method_res_type(mtp, --i);
1440
1441                         if (is_Primitive_type(tp)) {
1442                                 ir_mode *mode = get_type_mode(tp);
1443
1444                                 if (mode == env->high_signed ||
1445                                         mode == env->high_unsigned)
1446                                         ++n_res;
1447                         }
1448                 }
1449
1450                 res = new_type_method(n_param, n_res);
1451
1452                 /* set param types and result types */
1453                 for (i = n_param = 0; i < orig_n_params; ++i) {
1454                         ir_type *tp = get_method_param_type(mtp, i);
1455
1456                         if (is_Primitive_type(tp)) {
1457                                 ir_mode *mode = get_type_mode(tp);
1458
1459                                 if (mode == env->high_signed) {
1460                                         set_method_param_type(res, n_param++, tp_u);
1461                                         set_method_param_type(res, n_param++, tp_s);
1462                                 } else if (mode == env->high_unsigned) {
1463                                         set_method_param_type(res, n_param++, tp_u);
1464                                         set_method_param_type(res, n_param++, tp_u);
1465                                 } else {
1466                                         set_method_param_type(res, n_param++, tp);
1467                                 }
1468                         } else {
1469                                 set_method_param_type(res, n_param++, tp);
1470                         }
1471                 }
1472                 for (i = n_res = 0; i < orig_n_res; ++i) {
1473                         ir_type *tp = get_method_res_type(mtp, i);
1474
1475                         if (is_Primitive_type(tp)) {
1476                                 ir_mode *mode = get_type_mode(tp);
1477
1478                                 if (mode == env->high_signed) {
1479                                         set_method_res_type(res, n_res++, tp_u);
1480                                         set_method_res_type(res, n_res++, tp_s);
1481                                 } else if (mode == env->high_unsigned) {
1482                                         set_method_res_type(res, n_res++, tp_u);
1483                                         set_method_res_type(res, n_res++, tp_u);
1484                                 } else {
1485                                         set_method_res_type(res, n_res++, tp);
1486                                 }
1487                         } else {
1488                                 set_method_res_type(res, n_res++, tp);
1489                         }
1490                 }
1491                 set_lowered_type(mtp, res);
1492                 pmap_insert(lowered_type, mtp, res);
1493
1494                 value_type = get_method_value_param_type(mtp);
1495                 if (value_type != NULL) {
1496                         /* this creates a new value parameter type */
1497                         (void)get_method_value_param_ent(res, 0);
1498
1499                         /* set new param positions for all entities of the value type */
1500                         for (i = n_param = 0; i < orig_n_params; ++i) {
1501                                 ir_type   *tp  = get_method_param_type(mtp, i);
1502                                 ident     *id  = get_method_param_ident(mtp, i);
1503                                 ir_entity *ent = get_method_value_param_ent(mtp, i);
1504
1505                                 set_entity_arg_idx(ent, n_param);
1506                                 if (is_Primitive_type(tp)) {
1507                                         ir_mode *mode = get_type_mode(tp);
1508
1509                                         if (mode == env->high_signed || mode == env->high_unsigned) {
1510                                                 if (id != NULL) {
1511                                                         lid = id_mangle(id, env->first_id);
1512                                                         set_method_param_ident(res, n_param, lid);
1513                                                         set_entity_ident(get_method_value_param_ent(res, n_param), lid);
1514                                                         lid = id_mangle(id, env->next_id);
1515                                                         set_method_param_ident(res, n_param + 1, lid);
1516                                                         set_entity_ident(get_method_value_param_ent(res, n_param + 1), lid);
1517                                                 }
1518                                                 n_param += 2;
1519                                                 continue;
1520                                         }
1521                                 }
1522                                 if (id != NULL) {
1523                                         set_method_param_ident(res, n_param, id);
1524                                         set_entity_ident(get_method_value_param_ent(res, n_param), id);
1525                                 }
1526                                 ++n_param;
1527                         }
1528
1529                         set_lowered_type(value_type, get_method_value_param_type(res));
1530                 }
1531         } else {
1532                 res = (ir_type*)entry->value;
1533         }
1534         return res;
1535 }
1536
1537 /**
1538  * Translate a Return.
1539  */
1540 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env)
1541 {
1542         ir_graph  *irg = get_irn_irg(node);
1543         ir_entity *ent = get_irg_entity(irg);
1544         ir_type   *mtp = get_entity_type(ent);
1545         ir_node  **in;
1546         size_t     i, j, n;
1547         int        need_conv = 0;
1548         (void) mode;
1549
1550         /* check if this return must be lowered */
1551         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1552                 ir_node *pred = get_Return_res(node, i);
1553                 ir_mode *mode = get_irn_op_mode(pred);
1554
1555                 if (mode == env->high_signed || mode == env->high_unsigned)
1556                         need_conv = 1;
1557         }
1558         if (! need_conv)
1559                 return;
1560
1561         ent = get_irg_entity(irg);
1562         mtp = get_entity_type(ent);
1563
1564         mtp = lower_mtp(env, mtp);
1565         set_entity_type(ent, mtp);
1566
1567         /* create a new in array */
1568         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1569         in[0] = get_Return_mem(node);
1570
1571         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1572                 ir_node *pred      = get_Return_res(node, i);
1573                 ir_mode *pred_mode = get_irn_mode(pred);
1574
1575                 if (pred_mode == env->high_signed || pred_mode == env->high_unsigned) {
1576                         const node_entry_t *entry = get_node_entry(env, pred);
1577                         in[++j] = entry->low_word;
1578                         in[++j] = entry->high_word;
1579                 } else {
1580                         in[++j] = pred;
1581                 }
1582         }
1583
1584         set_irn_in(node, j+1, in);
1585 }
1586
1587 /**
1588  * Translate the parameters.
1589  */
1590 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env)
1591 {
1592         ir_graph  *irg = get_irn_irg(node);
1593         ir_entity *ent = get_irg_entity(irg);
1594         ir_type   *tp  = get_entity_type(ent);
1595         ir_type   *mtp;
1596         long      *new_projs;
1597         size_t    i, j, n_params;
1598         int       rem;
1599         ir_node   *proj, *args;
1600         (void) mode;
1601
1602         if (is_lowered_type(tp)) {
1603                 mtp = get_associated_type(tp);
1604         } else {
1605                 mtp = tp;
1606         }
1607         assert(! is_lowered_type(mtp));
1608
1609         n_params = get_method_n_params(mtp);
1610         if (n_params <= 0)
1611                 return;
1612
1613         NEW_ARR_A(long, new_projs, n_params);
1614
1615         /* first check if we have parameters that must be fixed */
1616         for (i = j = 0; i < n_params; ++i, ++j) {
1617                 ir_type *tp = get_method_param_type(mtp, i);
1618
1619                 new_projs[i] = j;
1620                 if (is_Primitive_type(tp)) {
1621                         ir_mode *mode = get_type_mode(tp);
1622
1623                         if (mode == env->high_signed ||
1624                                 mode == env->high_unsigned)
1625                                 ++j;
1626                 }
1627         }
1628         if (i == j)
1629                 return;
1630
1631         mtp = lower_mtp(env, mtp);
1632         set_entity_type(ent, mtp);
1633
1634         /* switch off optimization for new Proj nodes or they might be CSE'ed
1635            with not patched one's */
1636         rem = get_optimize();
1637         set_optimize(0);
1638
1639         /* ok, fix all Proj's and create new ones */
1640         args = get_irg_args(irg);
1641         for (proj = (ir_node*)get_irn_link(node); proj;
1642              proj = (ir_node*)get_irn_link(proj)) {
1643                 ir_node *pred = get_Proj_pred(proj);
1644                 long proj_nr;
1645                 ir_mode *mode;
1646                 ir_mode *mode_l;
1647                 ir_mode *mode_h;
1648                 ir_node *res_low;
1649                 ir_node *res_high;
1650                 dbg_info *dbg;
1651
1652                 /* do not visit this node again */
1653                 mark_irn_visited(proj);
1654
1655                 if (pred != args)
1656                         continue;
1657
1658                 proj_nr = get_Proj_proj(proj);
1659                 set_Proj_proj(proj, new_projs[proj_nr]);
1660
1661                 mode = get_irn_mode(proj);
1662                 mode_l = env->low_unsigned;
1663                 if (mode == env->high_signed) {
1664                         mode_h = env->low_signed;
1665                 } else if (mode == env->high_unsigned) {
1666                         mode_h = env->low_unsigned;
1667                 } else {
1668                         continue;
1669                 }
1670
1671                 dbg = get_irn_dbg_info(proj);
1672                 res_low  = new_rd_Proj(dbg, args, mode_l, new_projs[proj_nr]);
1673                 res_high = new_rd_Proj(dbg, args, mode_h, new_projs[proj_nr] + 1);
1674                 set_lowered(env, proj, res_low, res_high);
1675         }
1676         set_optimize(rem);
1677 }
1678
1679 /**
1680  * Translate a Call.
1681  */
1682 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env)
1683 {
1684         ir_type  *tp = get_Call_type(node);
1685         ir_type  *call_tp;
1686         ir_node  **in, *proj, *results;
1687         size_t   n_params, n_res;
1688         bool     need_lower = false;
1689         size_t   i, j;
1690         size_t   p;
1691         long     *res_numbers = NULL;
1692         (void) mode;
1693
1694         if (is_lowered_type(tp)) {
1695                 call_tp = get_associated_type(tp);
1696         } else {
1697                 call_tp = tp;
1698         }
1699
1700         assert(! is_lowered_type(call_tp));
1701
1702         n_params = get_method_n_params(call_tp);
1703         for (p = 0; p < n_params; ++p) {
1704                 ir_type *tp = get_method_param_type(call_tp, p);
1705
1706                 if (is_Primitive_type(tp)) {
1707                         ir_mode *mode = get_type_mode(tp);
1708
1709                         if (mode == env->high_signed || mode == env->high_unsigned) {
1710                                 need_lower = true;
1711                                 break;
1712                         }
1713                 }
1714         }
1715         n_res = get_method_n_ress(call_tp);
1716         if (n_res > 0) {
1717                 NEW_ARR_A(long, res_numbers, n_res);
1718
1719                 for (i = j = 0; i < n_res; ++i, ++j) {
1720                         ir_type *tp = get_method_res_type(call_tp, i);
1721
1722                         res_numbers[i] = j;
1723                         if (is_Primitive_type(tp)) {
1724                                 ir_mode *mode = get_type_mode(tp);
1725
1726                                 if (mode == env->high_signed || mode == env->high_unsigned) {
1727                                         need_lower = true;
1728                                         ++j;
1729                                 }
1730                         }
1731                 }
1732         }
1733
1734         if (! need_lower)
1735                 return;
1736
1737         /* let's lower it */
1738         call_tp = lower_mtp(env, call_tp);
1739         set_Call_type(node, call_tp);
1740
1741         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1742
1743         in[0] = get_Call_mem(node);
1744         in[1] = get_Call_ptr(node);
1745
1746         for (j = 2, i = 0; i < n_params; ++i) {
1747                 ir_node *pred      = get_Call_param(node, i);
1748                 ir_mode *pred_mode = get_irn_mode(pred);
1749
1750                 if (pred_mode == env->high_signed || pred_mode == env->high_unsigned) {
1751                         const node_entry_t *pred_entry = get_node_entry(env, pred);
1752                         in[j++] = pred_entry->low_word;
1753                         in[j++] = pred_entry->high_word;
1754                 } else {
1755                         in[j++] = pred;
1756                 }
1757         }
1758
1759         set_irn_in(node, j, in);
1760
1761         /* fix the results */
1762         results = NULL;
1763         for (proj = (ir_node*)get_irn_link(node); proj;
1764              proj = (ir_node*)get_irn_link(proj)) {
1765                 long proj_nr = get_Proj_proj(proj);
1766
1767                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
1768                         /* found the result proj */
1769                         results = proj;
1770                         break;
1771                 }
1772         }
1773
1774         if (results != NULL) {    /* there are results */
1775                 int rem = get_optimize();
1776
1777                 /* switch off optimization for new Proj nodes or they might be CSE'ed
1778                    with not patched one's */
1779                 set_optimize(0);
1780                 for (proj = (ir_node*)get_irn_link(results); proj; proj = (ir_node*)get_irn_link(proj)) {
1781                         if (get_Proj_pred(proj) == results) {
1782                                 long      proj_nr   = get_Proj_proj(proj);
1783                                 ir_mode  *proj_mode = get_irn_mode(proj);
1784                                 ir_mode  *mode_l;
1785                                 ir_mode  *mode_h;
1786                                 ir_node  *res_low;
1787                                 ir_node  *res_high;
1788                                 dbg_info *dbg;
1789
1790                                 /* found a result */
1791                                 mark_irn_visited(proj);
1792
1793                                 set_Proj_proj(proj, res_numbers[proj_nr]);
1794
1795                                 mode_l = env->low_unsigned;
1796                                 if (proj_mode == env->high_signed) {
1797                                         mode_h = env->low_signed;
1798                                 } else if (proj_mode == env->high_unsigned) {
1799                                         mode_h = env->low_unsigned;
1800                                 } else {
1801                                         continue;
1802                                 }
1803
1804                                 dbg      = get_irn_dbg_info(proj);
1805                                 res_low  = new_rd_Proj(dbg, results, mode_l, res_numbers[proj_nr]);
1806                                 res_high = new_rd_Proj(dbg, results, mode_h, res_numbers[proj_nr] + 1);
1807                                 set_lowered(env, proj, res_low, res_high);
1808                         }
1809                 }
1810                 set_optimize(rem);
1811         }
1812 }
1813
1814 /**
1815  * Translate an Unknown into two.
1816  */
1817 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env)
1818 {
1819         ir_mode  *low_mode = env->low_unsigned;
1820         ir_graph *irg      = get_irn_irg(node);
1821         ir_node  *res_low  = new_r_Unknown(irg, low_mode);
1822         ir_node  *res_high = new_r_Unknown(irg, mode);
1823         set_lowered(env, node, res_low, res_high);
1824 }
1825
1826 /**
1827  * Translate a Phi.
1828  *
1829  * First step: just create two templates
1830  */
1831 static void lower_Phi(lower_env_t *env, ir_node *phi)
1832 {
1833         ir_mode  *mode = get_irn_mode(phi);
1834         int       i;
1835         int       arity;
1836         ir_node **in_l;
1837         ir_node **in_h;
1838         ir_node  *unk_l;
1839         ir_node  *unk_h;
1840         ir_node  *phi_l;
1841         ir_node  *phi_h;
1842         dbg_info *dbg;
1843         ir_node  *block;
1844         ir_graph *irg;
1845         ir_mode  *mode_l;
1846         ir_mode  *mode_h;
1847
1848         /* enqueue predecessors */
1849         arity = get_Phi_n_preds(phi);
1850         for (i = 0; i < arity; ++i) {
1851                 ir_node *pred = get_Phi_pred(phi, i);
1852                 pdeq_putr(env->waitq, pred);
1853         }
1854
1855         if (mode != env->high_signed && mode != env->high_unsigned)
1856                 return;
1857
1858         /* first create a new in array */
1859         NEW_ARR_A(ir_node *, in_l, arity);
1860         NEW_ARR_A(ir_node *, in_h, arity);
1861         irg    = get_irn_irg(phi);
1862         mode_l = env->low_unsigned;
1863         mode_h = mode == env->high_signed ? env->low_signed : env->low_unsigned;
1864         unk_l  = new_r_Dummy(irg, mode_l);
1865         unk_h  = new_r_Dummy(irg, mode_h);
1866         for (i = 0; i < arity; ++i) {
1867                 in_l[i] = unk_l;
1868                 in_h[i] = unk_h;
1869         }
1870
1871         dbg   = get_irn_dbg_info(phi);
1872         block = get_nodes_block(phi);
1873         phi_l = new_rd_Phi(dbg, block, arity, in_l, mode_l);
1874         phi_h = new_rd_Phi(dbg, block, arity, in_h, mode_h);
1875
1876         set_lowered(env, phi, phi_l, phi_h);
1877
1878         /* remember that we need to fixup the predecessors later */
1879         ARR_APP1(ir_node*, env->lowered_phis, phi);
1880
1881         /* Don't forget to link the new Phi nodes into the block.
1882          * Beware that some Phis might be optimized away. */
1883         if (is_Phi(phi_l))
1884                 add_Block_phi(block, phi_l);
1885         if (is_Phi(phi_h))
1886                 add_Block_phi(block, phi_h);
1887 }
1888
1889 static void fixup_phi(lower_env_t *env, ir_node *phi)
1890 {
1891         const node_entry_t *entry = get_node_entry(env, phi);
1892         ir_node            *phi_l = entry->low_word;
1893         ir_node            *phi_h = entry->high_word;
1894         int                 arity = get_Phi_n_preds(phi);
1895         int                 i;
1896
1897         /* exchange phi predecessors which are lowered by now */
1898         for (i = 0; i < arity; ++i) {
1899                 ir_node            *pred       = get_Phi_pred(phi, i);
1900                 const node_entry_t *pred_entry = get_node_entry(env, pred);
1901
1902                 set_Phi_pred(phi_l, i, pred_entry->low_word);
1903                 set_Phi_pred(phi_h, i, pred_entry->high_word);
1904         }
1905 }
1906
1907 /**
1908  * Translate a Mux.
1909  */
1910 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env)
1911 {
1912         ir_node            *truen       = get_Mux_true(mux);
1913         ir_node            *falsen      = get_Mux_false(mux);
1914         ir_node            *sel         = get_Mux_sel(mux);
1915         const node_entry_t *true_entry  = get_node_entry(env, truen);
1916         const node_entry_t *false_entry = get_node_entry(env, falsen);
1917         ir_node            *true_l      = true_entry->low_word;
1918         ir_node            *true_h      = true_entry->high_word;
1919         ir_node            *false_l     = false_entry->low_word;
1920         ir_node            *false_h     = false_entry->high_word;
1921         dbg_info           *dbgi        = get_irn_dbg_info(mux);
1922         ir_node            *block       = get_nodes_block(mux);
1923         ir_node            *res_low
1924                 = new_rd_Mux(dbgi, block, sel, false_l, true_l, env->low_unsigned);
1925         ir_node            *res_high
1926                 = new_rd_Mux(dbgi, block, sel, false_h, true_h, mode);
1927         set_lowered(env, mux, res_low, res_high);
1928 }
1929
1930 /**
1931  * Translate an ASM node.
1932  */
1933 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env)
1934 {
1935         ir_mode *his = env->high_signed;
1936         ir_mode *hiu = env->high_unsigned;
1937         int      i;
1938         ir_node *n;
1939
1940         (void)mode;
1941
1942         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
1943                 ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
1944                 if (op_mode == his || op_mode == hiu) {
1945                         panic("lowering ASM unimplemented");
1946                 }
1947         }
1948
1949         for (n = asmn;;) {
1950                 ir_mode *proj_mode;
1951
1952                 n = (ir_node*)get_irn_link(n);
1953                 if (n == NULL)
1954                         break;
1955
1956                 proj_mode = get_irn_mode(n);
1957                 if (proj_mode == his || proj_mode == hiu) {
1958                         panic("lowering ASM unimplemented");
1959                 }
1960         }
1961 }
1962
1963 /**
1964  * Translate a Sel node.
1965  */
1966 static void lower_Sel(ir_node *sel, ir_mode *mode, lower_env_t *env)
1967 {
1968         (void) mode;
1969
1970         /* we must only lower value parameter Sels if we change the
1971            value parameter type. */
1972         if (env->value_param_tp != NULL) {
1973                 ir_entity *ent = get_Sel_entity(sel);
1974             if (get_entity_owner(ent) == env->value_param_tp) {
1975                         size_t pos = get_entity_arg_idx(ent);
1976
1977                         ent = get_method_value_param_ent(env->l_mtp, pos);
1978                         set_Sel_entity(sel, ent);
1979                 }
1980         }
1981 }
1982
1983 /**
1984  * check for opcodes that must always be lowered.
1985  */
1986 static bool always_lower(unsigned code)
1987 {
1988         switch (code) {
1989         case iro_ASM:
1990         case iro_Proj:
1991         case iro_Start:
1992         case iro_Call:
1993         case iro_Return:
1994         case iro_Cond:
1995         case iro_Conv:
1996         case iro_Sel:
1997                 return true;
1998         default:
1999                 return false;
2000         }
2001 }
2002
2003 /**
2004  * Compare two op_mode_entry_t's.
2005  */
2006 static int cmp_op_mode(const void *elt, const void *key, size_t size)
2007 {
2008         const op_mode_entry_t *e1 = (const op_mode_entry_t*)elt;
2009         const op_mode_entry_t *e2 = (const op_mode_entry_t*)key;
2010         (void) size;
2011
2012         return (e1->op != e2->op) | (e1->imode != e2->imode) | (e1->omode != e2->omode);
2013 }
2014
2015 /**
2016  * Compare two conv_tp_entry_t's.
2017  */
2018 static int cmp_conv_tp(const void *elt, const void *key, size_t size)
2019 {
2020         const conv_tp_entry_t *e1 = (const conv_tp_entry_t*)elt;
2021         const conv_tp_entry_t *e2 = (const conv_tp_entry_t*)key;
2022         (void) size;
2023
2024         return (e1->imode != e2->imode) | (e1->omode != e2->omode);
2025 }
2026
2027 /**
2028  * Enter a lowering function into an ir_op.
2029  */
2030 static void enter_lower_func(ir_op *op, lower_func func)
2031 {
2032         op->ops.generic = (op_func)func;
2033 }
2034
2035 /**
2036  * Returns non-zero if a method type must be lowered.
2037  *
2038  * @param mtp  the method type
2039  */
2040 static bool mtp_must_be_lowered(lower_env_t *env, ir_type *mtp)
2041 {
2042         size_t i, n_params = get_method_n_params(mtp);
2043
2044         /* first check if we have parameters that must be fixed */
2045         for (i = 0; i < n_params; ++i) {
2046                 ir_type *tp = get_method_param_type(mtp, i);
2047
2048                 if (is_Primitive_type(tp)) {
2049                         ir_mode *mode = get_type_mode(tp);
2050
2051                         if (mode == env->high_signed ||
2052                                 mode == env->high_unsigned)
2053                                 return true;
2054                 }
2055         }
2056         return false;
2057 }
2058
2059 /* Determine which modes need to be lowered */
2060 static void setup_modes(lower_env_t *env)
2061 {
2062         unsigned           size_bits           = env->params->doubleword_size;
2063         ir_mode           *doubleword_signed   = NULL;
2064         ir_mode           *doubleword_unsigned = NULL;
2065         size_t             n_modes             = get_irp_n_modes();
2066         ir_mode_arithmetic arithmetic;
2067         unsigned           modulo_shift;
2068         size_t             i;
2069
2070         /* search for doubleword modes... */
2071         for (i = 0; i < n_modes; ++i) {
2072                 ir_mode *mode = get_irp_mode(i);
2073                 if (!mode_is_int(mode))
2074                         continue;
2075                 if (get_mode_size_bits(mode) != size_bits)
2076                         continue;
2077                 if (mode_is_signed(mode)) {
2078                         if (doubleword_signed != NULL) {
2079                                 /* sigh - the lowerer should really just lower all mode with
2080                                  * size_bits it finds. Unfortunately this required a bigger
2081                                  * rewrite. */
2082                                 panic("multiple double word signed modes found");
2083                         }
2084                         doubleword_signed = mode;
2085                 } else {
2086                         if (doubleword_unsigned != NULL) {
2087                                 /* sigh - the lowerer should really just lower all mode with
2088                                  * size_bits it finds. Unfortunately this required a bigger
2089                                  * rewrite. */
2090                                 panic("multiple double word unsigned modes found");
2091                         }
2092                         doubleword_unsigned = mode;
2093                 }
2094         }
2095         if (doubleword_signed == NULL || doubleword_unsigned == NULL) {
2096                 panic("Couldn't find doubleword modes");
2097         }
2098
2099         arithmetic   = get_mode_arithmetic(doubleword_signed);
2100         modulo_shift = get_mode_modulo_shift(doubleword_signed);
2101
2102         assert(get_mode_size_bits(doubleword_unsigned) == size_bits);
2103         assert(size_bits % 2 == 0);
2104         assert(get_mode_sign(doubleword_signed) == 1);
2105         assert(get_mode_sign(doubleword_unsigned) == 0);
2106         assert(get_mode_sort(doubleword_signed) == irms_int_number);
2107         assert(get_mode_sort(doubleword_unsigned) == irms_int_number);
2108         assert(get_mode_arithmetic(doubleword_unsigned) == arithmetic);
2109         assert(get_mode_modulo_shift(doubleword_unsigned) == modulo_shift);
2110
2111         /* try to guess a sensible modulo shift for the new mode.
2112          * (This is IMO another indication that this should really be a node
2113          *  attribute instead of a mode thing) */
2114         if (modulo_shift == size_bits) {
2115                 modulo_shift = modulo_shift / 2;
2116         } else if (modulo_shift == 0) {
2117                 /* fine */
2118         } else {
2119                 panic("Don't know what new modulo shift to use for lowered doubleword mode");
2120         }
2121         size_bits /= 2;
2122
2123         /* produce lowered modes */
2124         env->high_signed   = doubleword_signed;
2125         env->high_unsigned = doubleword_unsigned;
2126         env->low_signed    = new_ir_mode("WS", irms_int_number, size_bits, 1,
2127                                          arithmetic, modulo_shift);
2128         env->low_unsigned  = new_ir_mode("WU", irms_int_number, size_bits, 0,
2129                                          arithmetic, modulo_shift);
2130 }
2131
2132 static void enqueue_preds(lower_env_t *env, ir_node *node)
2133 {
2134         int arity = get_irn_arity(node);
2135         int i;
2136
2137         for (i = 0; i < arity; ++i) {
2138                 ir_node *pred = get_irn_n(node, i);
2139                 pdeq_putr(env->waitq, pred);
2140         }
2141 }
2142
2143 static void lower_node(lower_env_t *env, ir_node *node)
2144 {
2145         int           arity;
2146         int           i;
2147         lower_func    func;
2148         ir_op        *op;
2149         ir_mode      *mode;
2150         unsigned      idx;
2151         node_entry_t *entry;
2152
2153         if (irn_visited(node))
2154                 return;
2155         mark_irn_visited(node);
2156
2157         /* cycles are always broken at Phi and Block nodes. So we don't need special
2158          * magic in all the other lower functions */
2159         if (is_Block(node)) {
2160                 enqueue_preds(env, node);
2161                 return;
2162         } else if (is_Phi(node)) {
2163                 lower_Phi(env, node);
2164                 return;
2165         }
2166
2167         /* depth-first: descend into operands */
2168         if (!is_Block(node)) {
2169                 ir_node *block = get_nodes_block(node);
2170                 lower_node(env, block);
2171         }
2172
2173         if (!is_Cond(node)) {
2174                 arity = get_irn_arity(node);
2175                 for (i = 0; i < arity; ++i) {
2176                         ir_node *pred = get_irn_n(node, i);
2177                         lower_node(env, pred);
2178                 }
2179         }
2180
2181         op   = get_irn_op(node);
2182         func = (lower_func) op->ops.generic;
2183         if (func == NULL)
2184                 return;
2185
2186         idx   = get_irn_idx(node);
2187         entry = idx < env->n_entries ? env->entries[idx] : NULL;
2188         if (entry != NULL || always_lower(get_irn_opcode(node))) {
2189                 mode = get_irn_op_mode(node);
2190                 if (mode == env->high_signed) {
2191                         mode = env->low_signed;
2192                 } else {
2193                         mode = env->low_unsigned;
2194                 }
2195                 DB((dbg, LEVEL_1, "  %+F\n", node));
2196                 func(node, mode, env);
2197         }
2198 }
2199
2200 static void lower_irg(lower_env_t *env, ir_graph *irg)
2201 {
2202         ir_entity *ent;
2203         ir_type   *mtp;
2204         unsigned   n_idx;
2205
2206         obstack_init(&env->obst);
2207
2208         n_idx = get_irg_last_idx(irg);
2209         n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2210         env->n_entries = n_idx;
2211         env->entries   = NEW_ARR_F(node_entry_t*, n_idx);
2212         memset(env->entries, 0, sizeof(env->entries[0]) * n_idx);
2213
2214         env->irg            = irg;
2215         env->l_mtp          = NULL;
2216         env->flags          = 0;
2217         env->proj_2_block   = pmap_create();
2218         env->value_param_tp = NULL;
2219
2220         ent = get_irg_entity(irg);
2221         mtp = get_entity_type(ent);
2222
2223         if (mtp_must_be_lowered(env, mtp)) {
2224                 ir_type *ltp = lower_mtp(env, mtp);
2225                 env->flags |= MUST_BE_LOWERED;
2226                 set_entity_type(ent, ltp);
2227                 env->l_mtp = ltp;
2228                 env->value_param_tp = get_method_value_param_type(mtp);
2229         }
2230
2231         /* first step: link all nodes and allocate data */
2232         ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2233         irg_walk_graph(irg, firm_clear_node_and_phi_links,
2234                        prepare_links_and_handle_rotl, env);
2235
2236         if (env->flags & MUST_BE_LOWERED) {
2237                 size_t i;
2238                 ir_reserve_resources(irg, IR_RESOURCE_IRN_VISITED);
2239                 inc_irg_visited(irg);
2240
2241                 assert(pdeq_empty(env->waitq));
2242                 pdeq_putr(env->waitq, get_irg_end(irg));
2243
2244                 env->lowered_phis = NEW_ARR_F(ir_node*, 0);
2245                 while (!pdeq_empty(env->waitq)) {
2246                         ir_node *node = (ir_node*)pdeq_getl(env->waitq);
2247                         lower_node(env, node);
2248                 }
2249
2250                 /* we need to fixup phis */
2251                 for (i = 0; i < ARR_LEN(env->lowered_phis); ++i) {
2252                         ir_node *phi = env->lowered_phis[i];
2253                         fixup_phi(env, phi);
2254                 }
2255                 DEL_ARR_F(env->lowered_phis);
2256
2257
2258                 ir_free_resources(irg, IR_RESOURCE_IRN_VISITED);
2259
2260                 /* outs are invalid, we changed the graph */
2261                 set_irg_outs_inconsistent(irg);
2262
2263                 if (env->flags & CF_CHANGED) {
2264                         /* control flow changed, dominance info is invalid */
2265                         set_irg_doms_inconsistent(irg);
2266                         set_irg_extblk_inconsistent(irg);
2267                         set_irg_loopinfo_inconsistent(irg);
2268                 }
2269         }
2270
2271         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2272
2273         pmap_destroy(env->proj_2_block);
2274         DEL_ARR_F(env->entries);
2275         obstack_free(&env->obst, NULL);
2276 }
2277
2278 /*
2279  * Do the lowering.
2280  */
2281 void lower_dw_ops(const lwrdw_param_t *param)
2282 {
2283         lower_env_t lenv;
2284         size_t      i, n;
2285
2286         assert(param != NULL);
2287         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2288
2289         memset(&lenv, 0, sizeof(lenv));
2290         lenv.params = param;
2291         setup_modes(&lenv);
2292
2293         /* create the necessary maps */
2294         if (! intrinsic_fkt)
2295                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2296         if (! conv_types)
2297                 conv_types = new_set(cmp_conv_tp, 16);
2298         if (! lowered_type)
2299                 lowered_type = pmap_create();
2300
2301         /* create a primitive unsigned and signed type */
2302         if (! tp_u)
2303                 tp_u = get_type_for_mode(lenv.low_unsigned);
2304         if (! tp_s)
2305                 tp_s = get_type_for_mode(lenv.low_signed);
2306
2307         /* create method types for the created binop calls */
2308         if (! binop_tp_u) {
2309                 binop_tp_u = new_type_method(4, 2);
2310                 set_method_param_type(binop_tp_u, 0, tp_u);
2311                 set_method_param_type(binop_tp_u, 1, tp_u);
2312                 set_method_param_type(binop_tp_u, 2, tp_u);
2313                 set_method_param_type(binop_tp_u, 3, tp_u);
2314                 set_method_res_type(binop_tp_u, 0, tp_u);
2315                 set_method_res_type(binop_tp_u, 1, tp_u);
2316         }
2317         if (! binop_tp_s) {
2318                 binop_tp_s = new_type_method(4, 2);
2319                 set_method_param_type(binop_tp_s, 0, tp_u);
2320                 set_method_param_type(binop_tp_s, 1, tp_s);
2321                 set_method_param_type(binop_tp_s, 2, tp_u);
2322                 set_method_param_type(binop_tp_s, 3, tp_s);
2323                 set_method_res_type(binop_tp_s, 0, tp_u);
2324                 set_method_res_type(binop_tp_s, 1, tp_s);
2325         }
2326         if (! shiftop_tp_u) {
2327                 shiftop_tp_u = new_type_method(3, 2);
2328                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2329                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2330                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2331                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2332                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2333         }
2334         if (! shiftop_tp_s) {
2335                 shiftop_tp_s = new_type_method(3, 2);
2336                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2337                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2338                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2339                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2340                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2341         }
2342         if (! unop_tp_u) {
2343                 unop_tp_u = new_type_method(2, 2);
2344                 set_method_param_type(unop_tp_u, 0, tp_u);
2345                 set_method_param_type(unop_tp_u, 1, tp_u);
2346                 set_method_res_type(unop_tp_u, 0, tp_u);
2347                 set_method_res_type(unop_tp_u, 1, tp_u);
2348         }
2349         if (! unop_tp_s) {
2350                 unop_tp_s = new_type_method(2, 2);
2351                 set_method_param_type(unop_tp_s, 0, tp_u);
2352                 set_method_param_type(unop_tp_s, 1, tp_s);
2353                 set_method_res_type(unop_tp_s, 0, tp_u);
2354                 set_method_res_type(unop_tp_s, 1, tp_s);
2355         }
2356
2357         clear_irp_opcodes_generic_func();
2358         enter_lower_func(op_ASM,     lower_ASM);
2359         enter_lower_func(op_Add,     lower_binop);
2360         enter_lower_func(op_And,     lower_And);
2361         enter_lower_func(op_Call,    lower_Call);
2362         enter_lower_func(op_Cmp,     lower_Cmp);
2363         enter_lower_func(op_Cond,    lower_Cond);
2364         enter_lower_func(op_Const,   lower_Const);
2365         enter_lower_func(op_Conv,    lower_Conv);
2366         enter_lower_func(op_Div,     lower_Div);
2367         enter_lower_func(op_Eor,     lower_Eor);
2368         enter_lower_func(op_Load,    lower_Load);
2369         enter_lower_func(op_Minus,   lower_Unop);
2370         enter_lower_func(op_Mod,     lower_Mod);
2371         enter_lower_func(op_Mul,     lower_binop);
2372         enter_lower_func(op_Mux,     lower_Mux);
2373         enter_lower_func(op_Not,     lower_Not);
2374         enter_lower_func(op_Or,      lower_Or);
2375         enter_lower_func(op_Return,  lower_Return);
2376         enter_lower_func(op_Sel,     lower_Sel);
2377         enter_lower_func(op_Shl,     lower_Shl);
2378         enter_lower_func(op_Shr,     lower_Shr);
2379         enter_lower_func(op_Shrs,    lower_Shrs);
2380         enter_lower_func(op_Start,   lower_Start);
2381         enter_lower_func(op_Store,   lower_Store);
2382         enter_lower_func(op_Sub,     lower_binop);
2383         enter_lower_func(op_Unknown, lower_Unknown);
2384
2385         lenv.tv_mode_bytes = new_tarval_from_long(param->doubleword_size/(2*8), lenv.low_unsigned);
2386         lenv.tv_mode_bits  = new_tarval_from_long(param->doubleword_size/2, lenv.low_unsigned);
2387         lenv.waitq         = new_pdeq();
2388         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
2389         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
2390
2391         /* transform all graphs */
2392         for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
2393                 ir_graph *irg = get_irp_irg(i);
2394                 lower_irg(&lenv, irg);
2395         }
2396         del_pdeq(lenv.waitq);
2397 }
2398
2399 /* Default implementation. */
2400 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2401                                     const ir_mode *imode, const ir_mode *omode,
2402                                     void *context)
2403 {
2404         char buf[64];
2405         ident *id;
2406         ir_entity *ent;
2407         (void) context;
2408
2409         if (imode == omode) {
2410                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2411         } else {
2412                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2413                         get_mode_name(imode), get_mode_name(omode));
2414         }
2415         id = new_id_from_str(buf);
2416
2417         ent = new_entity(get_glob_type(), id, method);
2418         set_entity_ld_ident(ent, get_entity_ident(ent));
2419         return ent;
2420 }