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

   1 /*
   2  * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
   3  *
   4  * This file is part of libFirm.
   5  *
   6  * This file may be distributed and/or modified under the terms of the
   7  * GNU General Public License version 2 as published by the Free Software
   8  * Foundation and appearing in the file LICENSE.GPL included in the
   9  * packaging of this file.
  10  *
  11  * Licensees holding valid libFirm Professional Edition licenses may use
  12  * this file in accordance with the libFirm Commercial License.
  13  * Agreement provided with the Software.
  14  *
  15  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  16  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE.
  18  */
  19
  20 /**
  21  * @file
  22  * @brief   Lower Double word operations, ie 64bit -> 32bit, 32bit -> 16bit etc.
  23  * @date    8.10.2004
  24  * @author  Michael Beck
  25  * @version $Id$
  26  */
  27 #include "config.h"
  28
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <assert.h>
  32
  33 #include "error.h"
  34 #include "lowering.h"
  35 #include "irnode_t.h"
  36 #include "irgraph_t.h"
  37 #include "irmode_t.h"
  38 #include "iropt_t.h"
  39 #include "irgmod.h"
  40 #include "tv_t.h"
  41 #include "dbginfo_t.h"
  42 #include "iropt_dbg.h"
  43 #include "irflag_t.h"
  44 #include "firmstat.h"
  45 #include "irgwalk.h"
  46 #include "ircons.h"
  47 #include "irflag.h"
  48 #include "irtools.h"
  49 #include "debug.h"
  50 #include "set.h"
  51 #include "pmap.h"
  52 #include "pdeq.h"
  53 #include "irdump.h"
  54 #include "array_t.h"
  55 #include "irpass_t.h"
  56
  57 /** A map from mode to a primitive type. */
  58 static pmap *prim_types;
  59
  60 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  61 static set *intrinsic_fkt;
  62
  63 /** A map from (imode, omode) to conv function types. */
  64 static set *conv_types;
  65
  66 /** A map from a method type to its lowered type. */
  67 static pmap *lowered_type;
  68
  69 /** The types for the binop and unop intrinsics. */
  70 static ir_type *binop_tp_u, *binop_tp_s, *unop_tp_u, *unop_tp_s, *shiftop_tp_u, *shiftop_tp_s, *tp_s, *tp_u;
  71
  72 /** the debug handle */
  73 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  74
  75 /**
  76  * An entry in the (op, imode, omode) -> entity map.
  77  */
  78 typedef struct _op_mode_entry {
  79         const ir_op   *op;    /**< the op */
  80         const ir_mode *imode; /**< the input mode */
  81         const ir_mode *omode; /**< the output mode */
  82         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  83 } op_mode_entry_t;
  84
  85 /**
  86  * An entry in the (imode, omode) -> tp map.
  87  */
  88 typedef struct _conv_tp_entry {
  89         const ir_mode *imode; /**< the input mode */
  90         const ir_mode *omode; /**< the output mode */
  91         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
  92 } conv_tp_entry_t;
  93
  94 /**
  95  * Every double word node will be replaced,
  96  * we need some store to hold the replacement:
  97  */
  98 typedef struct _node_entry_t {
  99         ir_node *low_word;    /**< the low word */
 100         ir_node *high_word;   /**< the high word */
 101 } node_entry_t;
 102
 103 enum lower_flags {
 104         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 105         CF_CHANGED      = 2,  /**< control flow was changed */
 106 };
 107
 108 /**
 109  * The lower environment.
 110  */
 111 typedef struct _lower_env_t {
 112         node_entry_t **entries;       /**< entries per node */
 113         struct obstack obst;          /**< an obstack holding the temporary data */
 114         ir_type  *l_mtp;              /**< lowered method type of the current method */
 115         tarval   *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 116         tarval   *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 117         pdeq     *waitq;              /**< a wait queue of all nodes that must be handled later */
 118         pmap     *proj_2_block;       /**< a map from ProjX to its destination blocks */
 119         ident    *first_id;           /**< .l for little and .h for big endian */
 120         ident    *next_id;            /**< .h for little and .l for big endian */
 121         const lwrdw_param_t *params;  /**< transformation parameter */
 122         unsigned flags;               /**< some flags */
 123         int      n_entries;           /**< number of entries */
 124         ir_type  *value_param_tp;     /**< the old value param type */
 125 } lower_env_t;
 126
 127 /**
 128  * Get a primitive mode for a mode.
 129  */
 130 static ir_type *get_primitive_type(ir_mode *mode) {
 131         pmap_entry *entry = pmap_find(prim_types, mode);
 132         ir_type *tp;
 133         char buf[64];
 134
 135         if (entry)
 136                 return entry->value;
 137
 138         snprintf(buf, sizeof(buf), "_prim_%s", get_mode_name(mode));
 139         tp = new_type_primitive(mode);
 140
 141         pmap_insert(prim_types, mode, tp);
 142         return tp;
 143 }  /* get_primitive_type */
 144
 145 /**
 146  * Create a method type for a Conv emulation from imode to omode.
 147  */
 148 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env) {
 149         conv_tp_entry_t key, *entry;
 150         ir_type *mtd;
 151
 152         key.imode = imode;
 153         key.omode = omode;
 154         key.mtd   = NULL;
 155
 156         entry = set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 157         if (! entry->mtd) {
 158                 int n_param = 1, n_res = 1;
 159
 160                 if (imode == env->params->high_signed || imode == env->params->high_unsigned)
 161                         n_param = 2;
 162                 if (omode == env->params->high_signed || omode == env->params->high_unsigned)
 163                         n_res = 2;
 164
 165                 /* create a new one */
 166                 mtd = new_type_method(n_param, n_res);
 167
 168                 /* set param types and result types */
 169                 n_param = 0;
 170                 if (imode == env->params->high_signed) {
 171                         set_method_param_type(mtd, n_param++, tp_u);
 172                         set_method_param_type(mtd, n_param++, tp_s);
 173                 } else if (imode == env->params->high_unsigned) {
 174                         set_method_param_type(mtd, n_param++, tp_u);
 175                         set_method_param_type(mtd, n_param++, tp_u);
 176                 } else {
 177                         ir_type *tp = get_primitive_type(imode);
 178                         set_method_param_type(mtd, n_param++, tp);
 179                 }  /* if */
 180
 181                 n_res = 0;
 182                 if (omode == env->params->high_signed) {
 183                         set_method_res_type(mtd, n_res++, tp_u);
 184                         set_method_res_type(mtd, n_res++, tp_s);
 185                 } else if (omode == env->params->high_unsigned) {
 186                         set_method_res_type(mtd, n_res++, tp_u);
 187                         set_method_res_type(mtd, n_res++, tp_u);
 188                 } else {
 189                         ir_type *tp = get_primitive_type(omode);
 190                         set_method_res_type(mtd, n_res++, tp);
 191                 }  /* if */
 192                 entry->mtd = mtd;
 193         } else {
 194                 mtd = entry->mtd;
 195         }  /* if */
 196         return mtd;
 197 }  /* get_conv_type */
 198
 199 /**
 200  * Add an additional control flow input to a block.
 201  * Patch all Phi nodes. The new Phi inputs are copied from
 202  * old input number nr.
 203  */
 204 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 205 {
 206         int i, arity = get_irn_arity(block);
 207         ir_node **in, *phi;
 208
 209         assert(nr < arity);
 210
 211         NEW_ARR_A(ir_node *, in, arity + 1);
 212         for (i = 0; i < arity; ++i)
 213                 in[i] = get_irn_n(block, i);
 214         in[i] = cf;
 215
 216         set_irn_in(block, i + 1, in);
 217
 218         for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
 219                 for (i = 0; i < arity; ++i)
 220                         in[i] = get_irn_n(phi, i);
 221                 in[i] = in[nr];
 222                 set_irn_in(phi, i + 1, in);
 223         }  /* for */
 224 }  /* add_block_cf_input_nr */
 225
 226 /**
 227  * Add an additional control flow input to a block.
 228  * Patch all Phi nodes. The new Phi inputs are copied from
 229  * old input from cf tmpl.
 230  */
 231 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 232 {
 233         int i, arity = get_irn_arity(block);
 234         int nr = 0;
 235
 236         for (i = 0; i < arity; ++i) {
 237                 if (get_irn_n(block, i) == tmpl) {
 238                         nr = i;
 239                         break;
 240                 }  /* if */
 241         }  /* for */
 242         assert(i < arity);
 243         add_block_cf_input_nr(block, nr, cf);
 244 }  /* add_block_cf_input */
 245
 246 /**
 247  * Return the "operational" mode of a Firm node.
 248  */
 249 static ir_mode *get_irn_op_mode(ir_node *node)
 250 {
 251         switch (get_irn_opcode(node)) {
 252         case iro_Load:
 253                 return get_Load_mode(node);
 254         case iro_Store:
 255                 return get_irn_mode(get_Store_value(node));
 256         case iro_DivMod:
 257                 return get_irn_mode(get_DivMod_left(node));
 258         case iro_Div:
 259                 return get_irn_mode(get_Div_left(node));
 260         case iro_Mod:
 261                 return get_irn_mode(get_Mod_left(node));
 262         case iro_Cmp:
 263                 return get_irn_mode(get_Cmp_left(node));
 264         default:
 265                 return get_irn_mode(node);
 266         }  /* switch */
 267 }  /* get_irn_op_mode */
 268
 269 /**
 270  * Walker, prepare the node links.
 271  */
 272 static void prepare_links(ir_node *node, void *env)
 273 {
 274         lower_env_t  *lenv = env;
 275         ir_mode      *mode = get_irn_op_mode(node);
 276         node_entry_t *link;
 277         int          i, idx;
 278
 279         if (mode == lenv->params->high_signed ||
 280                 mode == lenv->params->high_unsigned) {
 281                 /* ok, found a node that will be lowered */
 282                 link = OALLOCZ(&lenv->obst, node_entry_t);
 283
 284                 idx = get_irn_idx(node);
 285                 if (idx >= lenv->n_entries) {
 286                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 287                         int old = lenv->n_entries;
 288                         int n_idx = idx + (idx >> 3);
 289
 290                         ARR_RESIZE(node_entry_t *, lenv->entries, n_idx);
 291                         memset(&lenv->entries[old], 0, (n_idx - old) * sizeof(lenv->entries[0]));
 292                         lenv->n_entries = n_idx;
 293                 }
 294                 lenv->entries[idx] = link;
 295                 lenv->flags |= MUST_BE_LOWERED;
 296         } else if (is_Conv(node)) {
 297                 /* Conv nodes have two modes */
 298                 ir_node *pred = get_Conv_op(node);
 299                 mode = get_irn_mode(pred);
 300
 301                 if (mode == lenv->params->high_signed ||
 302                         mode == lenv->params->high_unsigned) {
 303                         /* must lower this node either but don't need a link */
 304                         lenv->flags |= MUST_BE_LOWERED;
 305                 }  /* if */
 306                 return;
 307         }  /* if */
 308
 309         if (is_Proj(node)) {
 310                 /* link all Proj nodes to its predecessor:
 311                    Note that Tuple Proj's and its Projs are linked either. */
 312                 ir_node *pred = get_Proj_pred(node);
 313
 314                 set_irn_link(node, get_irn_link(pred));
 315                 set_irn_link(pred, node);
 316         } else if (is_Phi(node)) {
 317                 /* link all Phi nodes to its block */
 318                 ir_node *block = get_nodes_block(node);
 319                 add_Block_phi(block, node);
 320         } else if (is_Block(node)) {
 321                 /* fill the Proj -> Block map */
 322                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 323                         ir_node *pred = get_Block_cfgpred(node, i);
 324
 325                         if (is_Proj(pred))
 326                                 pmap_insert(lenv->proj_2_block, pred, node);
 327                 }  /* for */
 328         }  /* if */
 329 }  /* prepare_links */
 330
 331 /**
 332  * Translate a Constant: create two.
 333  */
 334 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env) {
 335         tarval   *tv, *tv_l, *tv_h;
 336         ir_node  *low, *high;
 337         dbg_info *dbg = get_irn_dbg_info(node);
 338         int      idx;
 339         ir_graph *irg = current_ir_graph;
 340         ir_mode  *low_mode = env->params->low_unsigned;
 341
 342         tv   = get_Const_tarval(node);
 343
 344         tv_l = tarval_convert_to(tv, low_mode);
 345         low  = new_rd_Const(dbg, irg, tv_l);
 346
 347         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 348         high = new_rd_Const(dbg, irg, tv_h);
 349
 350         idx = get_irn_idx(node);
 351         assert(idx < env->n_entries);
 352         env->entries[idx]->low_word  = low;
 353         env->entries[idx]->high_word = high;
 354 }  /* lower_Const */
 355
 356 /**
 357  * Translate a Load: create two.
 358  */
 359 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env) {
 360         ir_mode    *low_mode = env->params->low_unsigned;
 361         ir_graph   *irg = current_ir_graph;
 362         ir_node    *adr = get_Load_ptr(node);
 363         ir_node    *mem = get_Load_mem(node);
 364         ir_node    *low, *high, *proj;
 365         dbg_info   *dbg;
 366         ir_node    *block = get_nodes_block(node);
 367         int         idx;
 368         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 369                                  ? cons_volatile : 0;
 370
 371         if (env->params->little_endian) {
 372                 low  = adr;
 373                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 374         } else {
 375                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 376                 high = adr;
 377         }  /* if */
 378
 379         /* create two loads */
 380         dbg  = get_irn_dbg_info(node);
 381         low  = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 382         proj = new_r_Proj(block, low, mode_M, pn_Load_M);
 383         high = new_rd_Load(dbg, block, proj, high, mode, volatility);
 384
 385         idx = get_irn_idx(node);
 386         assert(idx < env->n_entries);
 387         env->entries[idx]->low_word  = low;
 388         env->entries[idx]->high_word = high;
 389
 390         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 391                 idx = get_irn_idx(proj);
 392
 393                 switch (get_Proj_proj(proj)) {
 394                 case pn_Load_M:         /* Memory result. */
 395                         /* put it to the second one */
 396                         set_Proj_pred(proj, high);
 397                         break;
 398                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 399                         /* put it to the first one */
 400                         set_Proj_pred(proj, low);
 401                         break;
 402                 case pn_Load_res:       /* Result of load operation. */
 403                         assert(idx < env->n_entries);
 404                         env->entries[idx]->low_word  = new_r_Proj(block, low,  low_mode, pn_Load_res);
 405                         env->entries[idx]->high_word = new_r_Proj(block, high, mode,     pn_Load_res);
 406                         break;
 407                 default:
 408                         assert(0 && "unexpected Proj number");
 409                 }  /* switch */
 410                 /* mark this proj: we have handled it already, otherwise we might fall into
 411                  * out new nodes. */
 412                 mark_irn_visited(proj);
 413         }  /* for */
 414 }  /* lower_Load */
 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         ir_graph     *irg;
 421         ir_node      *block, *adr, *mem;
 422         ir_node      *low, *high, *irn, *proj;
 423         dbg_info     *dbg;
 424         int           idx;
 425         node_entry_t *entry;
 426         ir_cons_flags    volatility = get_Store_volatility(node) == volatility_is_volatile
 427                                    ? cons_volatile : 0;
 428         (void) mode;
 429
 430         irn = get_Store_value(node);
 431         entry = env->entries[get_irn_idx(irn)];
 432         assert(entry);
 433
 434         if (! entry->low_word) {
 435                 /* not ready yet, wait */
 436                 pdeq_putr(env->waitq, node);
 437                 return;
 438         }  /* if */
 439
 440         irg = current_ir_graph;
 441         adr = get_Store_ptr(node);
 442         mem = get_Store_mem(node);
 443         block = get_nodes_block(node);
 444
 445         if (env->params->little_endian) {
 446                 low  = adr;
 447                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 448         } else {
 449                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 450                 high = adr;
 451         }  /* if */
 452
 453         /* create two Stores */
 454         dbg = get_irn_dbg_info(node);
 455         low  = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 456         proj = new_r_Proj(block, low, mode_M, pn_Store_M);
 457         high = new_rd_Store(dbg, block, proj, high, entry->high_word, volatility);
 458
 459         idx = get_irn_idx(node);
 460         assert(idx < env->n_entries);
 461         env->entries[idx]->low_word  = low;
 462         env->entries[idx]->high_word = high;
 463
 464         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 465                 idx = get_irn_idx(proj);
 466
 467                 switch (get_Proj_proj(proj)) {
 468                 case pn_Store_M:         /* Memory result. */
 469                         /* put it to the second one */
 470                         set_Proj_pred(proj, high);
 471                         break;
 472                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 473                         /* put it to the first one */
 474                         set_Proj_pred(proj, low);
 475                         break;
 476                 default:
 477                         assert(0 && "unexpected Proj number");
 478                 }  /* switch */
 479                 /* mark this proj: we have handled it already, otherwise we might fall into
 480                  * out new nodes. */
 481                 mark_irn_visited(proj);
 482         }  /* for */
 483 }  /* lower_Store */
 484
 485 /**
 486  * Return a node containing the address of the intrinsic emulation function.
 487  *
 488  * @param method  the method type of the emulation function
 489  * @param op      the emulated ir_op
 490  * @param imode   the input mode of the emulated opcode
 491  * @param omode   the output mode of the emulated opcode
 492  * @param env     the lower environment
 493  */
 494 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 495                                       ir_mode *imode, ir_mode *omode,
 496                                       lower_env_t *env) {
 497         symconst_symbol sym;
 498         ir_entity *ent;
 499         op_mode_entry_t key, *entry;
 500
 501         key.op    = op;
 502         key.imode = imode;
 503         key.omode = omode;
 504         key.ent   = NULL;
 505
 506         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 507                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 508         if (! entry->ent) {
 509                 /* create a new one */
 510                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 511
 512                 assert(ent && "Intrinsic creator must return an entity");
 513                 entry->ent = ent;
 514         } else {
 515                 ent = entry->ent;
 516         }  /* if */
 517         sym.entity_p = ent;
 518         return new_r_SymConst(current_ir_graph, mode_P_code, sym, symconst_addr_ent);
 519 }  /* get_intrinsic_address */
 520
 521 /**
 522  * Translate a Div.
 523  *
 524  * Create an intrinsic Call.
 525  */
 526 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env) {
 527         ir_node  *block, *irn, *call, *proj;
 528         ir_node  *in[4];
 529         ir_mode  *opmode;
 530         dbg_info *dbg;
 531         ir_type  *mtp;
 532         int      idx;
 533         node_entry_t *entry;
 534
 535         irn   = get_Div_left(node);
 536         entry = env->entries[get_irn_idx(irn)];
 537         assert(entry);
 538
 539         if (! entry->low_word) {
 540                 /* not ready yet, wait */
 541                 pdeq_putr(env->waitq, node);
 542                 return;
 543         }  /* if */
 544
 545         in[0] = entry->low_word;
 546         in[1] = entry->high_word;
 547
 548         irn   = get_Div_right(node);
 549         entry = env->entries[get_irn_idx(irn)];
 550         assert(entry);
 551
 552         if (! entry->low_word) {
 553                 /* not ready yet, wait */
 554                 pdeq_putr(env->waitq, node);
 555                 return;
 556         }  /* if */
 557
 558         in[2] = entry->low_word;
 559         in[3] = entry->high_word;
 560
 561         dbg   = get_irn_dbg_info(node);
 562         block = get_nodes_block(node);
 563
 564         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 565         opmode = get_irn_op_mode(node);
 566         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 567         call = new_rd_Call(dbg, block, get_Div_mem(node), irn, 4, in, mtp);
 568         set_irn_pinned(call, get_irn_pinned(node));
 569         irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
 570
 571         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 572                 switch (get_Proj_proj(proj)) {
 573                 case pn_Div_M:         /* Memory result. */
 574                         /* reroute to the call */
 575                         set_Proj_pred(proj, call);
 576                         set_Proj_proj(proj, pn_Call_M);
 577                         break;
 578                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 579                         /* reroute to the call */
 580                         set_Proj_pred(proj, call);
 581                         set_Proj_proj(proj, pn_Call_X_except);
 582                         break;
 583                 case pn_Div_res:       /* Result of computation. */
 584                         idx = get_irn_idx(proj);
 585                         assert(idx < env->n_entries);
 586                         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 587                         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 588                         break;
 589                 default:
 590                         assert(0 && "unexpected Proj number");
 591                 }  /* switch */
 592                 /* mark this proj: we have handled it already, otherwise we might fall into
 593                  * out new nodes. */
 594                 mark_irn_visited(proj);
 595         }  /* for */
 596 }  /* lower_Div */
 597
 598 /**
 599  * Translate a Mod.
 600  *
 601  * Create an intrinsic Call.
 602  */
 603 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 604         ir_node  *block, *proj, *irn, *call;
 605         ir_node  *in[4];
 606         ir_mode  *opmode;
 607         dbg_info *dbg;
 608         ir_type  *mtp;
 609         int      idx;
 610         node_entry_t *entry;
 611
 612         irn   = get_Mod_left(node);
 613         entry = env->entries[get_irn_idx(irn)];
 614         assert(entry);
 615
 616         if (! entry->low_word) {
 617                 /* not ready yet, wait */
 618                 pdeq_putr(env->waitq, node);
 619                 return;
 620         }  /* if */
 621
 622         in[0] = entry->low_word;
 623         in[1] = entry->high_word;
 624
 625         irn   = get_Mod_right(node);
 626         entry = env->entries[get_irn_idx(irn)];
 627         assert(entry);
 628
 629         if (! entry->low_word) {
 630                 /* not ready yet, wait */
 631                 pdeq_putr(env->waitq, node);
 632                 return;
 633         }  /* if */
 634
 635         in[2] = entry->low_word;
 636         in[3] = entry->high_word;
 637
 638         dbg   = get_irn_dbg_info(node);
 639         block = get_nodes_block(node);
 640
 641         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 642         opmode = get_irn_op_mode(node);
 643         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 644         call = new_rd_Call(dbg, block, get_Mod_mem(node), irn, 4, in, mtp);
 645         set_irn_pinned(call, get_irn_pinned(node));
 646         irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
 647
 648         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 649                 switch (get_Proj_proj(proj)) {
 650                 case pn_Mod_M:         /* Memory result. */
 651                         /* reroute to the call */
 652                         set_Proj_pred(proj, call);
 653                         set_Proj_proj(proj, pn_Call_M);
 654                         break;
 655                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 656                         /* reroute to the call */
 657                         set_Proj_pred(proj, call);
 658                         set_Proj_proj(proj, pn_Call_X_except);
 659                         break;
 660                 case pn_Mod_res:       /* Result of computation. */
 661                         idx = get_irn_idx(proj);
 662                         assert(idx < env->n_entries);
 663                         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 664                         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 665                         break;
 666                 default:
 667                         assert(0 && "unexpected Proj number");
 668                 }  /* switch */
 669                 /* mark this proj: we have handled it already, otherwise we might fall into
 670                  * out new nodes. */
 671                 mark_irn_visited(proj);
 672         }  /* for */
 673 }  /* lower_Mod */
 674
 675 /**
 676  * Translate a DivMod.
 677  *
 678  * Create two intrinsic Calls.
 679  */
 680 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 681         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod;
 682         ir_node  *resDiv = NULL;
 683         ir_node  *resMod = NULL;
 684         ir_node  *in[4];
 685         ir_mode  *opmode;
 686         dbg_info *dbg;
 687         ir_type  *mtp;
 688         int      idx;
 689         node_entry_t *entry;
 690         unsigned flags = 0;
 691
 692         /* check if both results are needed */
 693         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 694                 switch (get_Proj_proj(proj)) {
 695                 case pn_DivMod_res_div: flags |= 1; break;
 696                 case pn_DivMod_res_mod: flags |= 2; break;
 697                 default: break;
 698                 }  /* switch */
 699         }  /* for */
 700
 701         irn   = get_DivMod_left(node);
 702         entry = env->entries[get_irn_idx(irn)];
 703         assert(entry);
 704
 705         if (! entry->low_word) {
 706                 /* not ready yet, wait */
 707                 pdeq_putr(env->waitq, node);
 708                 return;
 709         }  /* if */
 710
 711         in[0] = entry->low_word;
 712         in[1] = entry->high_word;
 713
 714         irn   = get_DivMod_right(node);
 715         entry = env->entries[get_irn_idx(irn)];
 716         assert(entry);
 717
 718         if (! entry->low_word) {
 719                 /* not ready yet, wait */
 720                 pdeq_putr(env->waitq, node);
 721                 return;
 722         }  /* if */
 723
 724         in[2] = entry->low_word;
 725         in[3] = entry->high_word;
 726
 727         dbg   = get_irn_dbg_info(node);
 728         block = get_nodes_block(node);
 729
 730         mem = get_DivMod_mem(node);
 731
 732         callDiv = callMod = NULL;
 733         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 734         if (flags & 1) {
 735                 opmode = get_irn_op_mode(node);
 736                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, env);
 737                 callDiv = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 738                 set_irn_pinned(callDiv, get_irn_pinned(node));
 739                 resDiv = new_r_Proj(block, callDiv, mode_T, pn_Call_T_result);
 740         }  /* if */
 741         if (flags & 2) {
 742                 if (flags & 1)
 743                         mem = new_r_Proj(block, callDiv, mode_M, pn_Call_M);
 744                 opmode = get_irn_op_mode(node);
 745                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, env);
 746                 callMod = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 747                 set_irn_pinned(callMod, get_irn_pinned(node));
 748                 resMod = new_r_Proj(block, callMod, mode_T, pn_Call_T_result);
 749         }  /* if */
 750
 751         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 752                 switch (get_Proj_proj(proj)) {
 753                 case pn_DivMod_M:         /* Memory result. */
 754                         /* reroute to the first call */
 755                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 756                         set_Proj_proj(proj, pn_Call_M);
 757                         break;
 758                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 759                         /* reroute to the first call */
 760                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 761                         set_Proj_proj(proj, pn_Call_X_except);
 762                         break;
 763                 case pn_DivMod_res_div:   /* Result of Div. */
 764                         idx = get_irn_idx(proj);
 765                         assert(idx < env->n_entries);
 766                         env->entries[idx]->low_word  = new_r_Proj(block, resDiv, env->params->low_unsigned, 0);
 767                         env->entries[idx]->high_word = new_r_Proj(block, resDiv, mode,                      1);
 768                         break;
 769                 case pn_DivMod_res_mod:   /* Result of Mod. */
 770                         idx = get_irn_idx(proj);
 771                         env->entries[idx]->low_word  = new_r_Proj(block, resMod, env->params->low_unsigned, 0);
 772                         env->entries[idx]->high_word = new_r_Proj(block, resMod, mode,                      1);
 773                         break;
 774                 default:
 775                         assert(0 && "unexpected Proj number");
 776                 }  /* switch */
 777                 /* mark this proj: we have handled it already, otherwise we might fall into
 778                  * out new nodes. */
 779                 mark_irn_visited(proj);
 780         }  /* for */
 781 }  /* lower_DivMod */
 782
 783 /**
 784  * Translate a Binop.
 785  *
 786  * Create an intrinsic Call.
 787  */
 788 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 789         ir_node  *block, *irn;
 790         ir_node  *in[4];
 791         dbg_info *dbg;
 792         ir_type  *mtp;
 793         int      idx;
 794         ir_graph *irg;
 795         node_entry_t *entry;
 796
 797         irn   = get_binop_left(node);
 798         entry = env->entries[get_irn_idx(irn)];
 799         assert(entry);
 800
 801         if (! entry->low_word) {
 802                 /* not ready yet, wait */
 803                 pdeq_putr(env->waitq, node);
 804                 return;
 805         }  /* if */
 806
 807         in[0] = entry->low_word;
 808         in[1] = entry->high_word;
 809
 810         irn   = get_binop_right(node);
 811         entry = env->entries[get_irn_idx(irn)];
 812         assert(entry);
 813
 814         if (! entry->low_word) {
 815                 /* not ready yet, wait */
 816                 pdeq_putr(env->waitq, node);
 817                 return;
 818         }  /* if */
 819
 820         in[2] = entry->low_word;
 821         in[3] = entry->high_word;
 822
 823         dbg   = get_irn_dbg_info(node);
 824         block = get_nodes_block(node);
 825         irg   = current_ir_graph;
 826
 827         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 828         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 829         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 830                 irn, 4, in, mtp);
 831         set_irn_pinned(irn, get_irn_pinned(node));
 832         irn = new_r_Proj(block, irn, mode_T, pn_Call_T_result);
 833
 834         idx = get_irn_idx(node);
 835         assert(idx < env->n_entries);
 836         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 837         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 838 }  /* lower_Binop */
 839
 840 /**
 841  * Translate a Shiftop.
 842  *
 843  * Create an intrinsic Call.
 844  */
 845 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 846         ir_node  *block, *irn;
 847         ir_node  *in[3];
 848         dbg_info *dbg;
 849         ir_type  *mtp;
 850         int      idx;
 851         ir_graph *irg;
 852         node_entry_t *entry;
 853
 854         irn   = get_binop_left(node);
 855         entry = env->entries[get_irn_idx(irn)];
 856         assert(entry);
 857
 858         if (! entry->low_word) {
 859                 /* not ready yet, wait */
 860                 pdeq_putr(env->waitq, node);
 861                 return;
 862         }  /* if */
 863
 864         in[0] = entry->low_word;
 865         in[1] = entry->high_word;
 866
 867         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 868         in[2] = get_binop_right(node);
 869
 870         dbg   = get_irn_dbg_info(node);
 871         block = get_nodes_block(node);
 872         irg  = current_ir_graph;
 873
 874         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 875         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 876         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 877                 irn, 3, in, mtp);
 878         set_irn_pinned(irn, get_irn_pinned(node));
 879         irn = new_r_Proj(block, irn, mode_T, pn_Call_T_result);
 880
 881         idx = get_irn_idx(node);
 882         assert(idx < env->n_entries);
 883         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 884         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 885 }  /* lower_Shiftop */
 886
 887 /**
 888  * Translate a Shr and handle special cases.
 889  */
 890 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env) {
 891         ir_node  *right = get_Shr_right(node);
 892         ir_graph *irg = current_ir_graph;
 893
 894         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 895                 tarval *tv = get_Const_tarval(right);
 896
 897                 if (tarval_is_long(tv) &&
 898                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 899                         ir_node *block = get_nodes_block(node);
 900                         ir_node *left = get_Shr_left(node);
 901                         ir_node *c;
 902                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 903                         int idx = get_irn_idx(left);
 904
 905                         left = env->entries[idx]->high_word;
 906                         idx = get_irn_idx(node);
 907
 908                         if (shf_cnt > 0) {
 909                                 c = new_r_Const_long(irg, env->params->low_unsigned, shf_cnt);
 910                                 env->entries[idx]->low_word = new_r_Shr(block, left, c, mode);
 911                         } else {
 912                                 env->entries[idx]->low_word = left;
 913                         }  /* if */
 914                         env->entries[idx]->high_word = new_r_Const(irg, get_mode_null(mode));
 915
 916                         return;
 917                 }  /* if */
 918         }  /* if */
 919         lower_Shiftop(node, mode, env);
 920 }  /* lower_Shr */
 921
 922 /**
 923  * Translate a Shl and handle special cases.
 924  */
 925 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env) {
 926         ir_node  *right = get_Shl_right(node);
 927         ir_graph *irg = current_ir_graph;
 928
 929         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 930                 tarval *tv = get_Const_tarval(right);
 931
 932                 if (tarval_is_long(tv) &&
 933                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 934                         ir_mode *mode_l;
 935                         ir_node *block = get_nodes_block(node);
 936                         ir_node *left = get_Shl_left(node);
 937                         ir_node *c;
 938                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 939                         int idx = get_irn_idx(left);
 940
 941                         left = new_r_Conv(block, env->entries[idx]->low_word, mode);
 942                         idx = get_irn_idx(node);
 943
 944                         mode_l = env->params->low_unsigned;
 945                         if (shf_cnt > 0) {
 946                                 c = new_r_Const_long(irg, mode_l, shf_cnt);
 947                                 env->entries[idx]->high_word = new_r_Shl(block, left, c, mode);
 948                         } else {
 949                                 env->entries[idx]->high_word = left;
 950                         }  /* if */
 951                         env->entries[idx]->low_word  = new_r_Const(irg, get_mode_null(mode_l));
 952
 953                         return;
 954                 }  /* if */
 955         }  /* if */
 956         lower_Shiftop(node, mode, env);
 957 }  /* lower_Shl */
 958
 959 /**
 960  * Translate a Shrs and handle special cases.
 961  */
 962 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env) {
 963         ir_node  *right = get_Shrs_right(node);
 964         ir_graph *irg = current_ir_graph;
 965
 966         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 967                 tarval *tv = get_Const_tarval(right);
 968
 969                 if (tarval_is_long(tv) &&
 970                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 971                         ir_node *block   = get_nodes_block(node);
 972                         ir_node *left    = get_Shrs_left(node);
 973                         long     shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 974                         int      idx     = get_irn_idx(left);
 975                         ir_mode *mode_l;
 976                         ir_node *low;
 977                         ir_node *c;
 978
 979                         left = env->entries[idx]->high_word;
 980                         idx = get_irn_idx(node);
 981
 982                         mode_l = env->params->low_unsigned;
 983                         if (shf_cnt > 0) {
 984                                 c   = new_r_Const_long(irg, mode_l, shf_cnt);
 985                                 low = new_r_Shrs(block, left, c, mode);
 986                         } else {
 987                                 low = left;
 988                         }  /* if */
 989                         /* low word is expected to have mode_l */
 990                         env->entries[idx]->low_word = new_r_Conv(block, low, mode_l);
 991
 992                         c = new_r_Const_long(irg, mode_l, get_mode_size_bits(mode) - 1);
 993                         env->entries[idx]->high_word = new_r_Shrs(block, left, c, mode);
 994
 995                         return;
 996                 }  /* if */
 997         }  /* if */
 998         lower_Shiftop(node, mode, env);
 999 }  /* lower_Shrs */
1000
1001 /**
1002  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1003  */
1004 static void prepare_links_and_handle_rotl(ir_node *node, void *env) {
1005         lower_env_t *lenv = env;
1006
1007         if (is_Rotl(node)) {
1008                 ir_mode *mode = get_irn_op_mode(node);
1009                         if (mode == lenv->params->high_signed ||
1010                             mode == lenv->params->high_unsigned) {
1011                                 ir_node  *right = get_Rotl_right(node);
1012                                 ir_node  *left, *shl, *shr, *or, *block, *sub, *c;
1013                                 ir_mode  *omode, *rmode;
1014                                 dbg_info *dbg;
1015                                 optimization_state_t state;
1016
1017                                 if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1018                                         tarval *tv = get_Const_tarval(right);
1019
1020                                         if (tarval_is_long(tv) &&
1021                                             get_tarval_long(tv) == (long)get_mode_size_bits(mode)) {
1022                                                 /* will be optimized in lower_Rotl() */
1023                                                 return;
1024                                         }
1025                                 }
1026
1027                                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) and lower those */
1028                                 dbg   = get_irn_dbg_info(node);
1029                                 omode = get_irn_mode(node);
1030                                 left  = get_Rotl_left(node);
1031                                 block = get_nodes_block(node);
1032                                 shl   = new_rd_Shl(dbg, block, left, right, omode);
1033                                 rmode = get_irn_mode(right);
1034                                 c     = new_Const_long(rmode, get_mode_size_bits(omode));
1035                                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
1036                                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
1037
1038                                 /* optimization must be switched off here, or we will get the Rotl back */
1039                                 save_optimization_state(&state);
1040                                 set_opt_algebraic_simplification(0);
1041                                 or = new_rd_Or(dbg, block, shl, shr, omode);
1042                                 restore_optimization_state(&state);
1043
1044                                 exchange(node, or);
1045
1046                                 /* do lowering on the new nodes */
1047                                 prepare_links(shl, env);
1048                                 prepare_links(c, env);
1049                                 prepare_links(sub, env);
1050                                 prepare_links(shr, env);
1051                                 prepare_links(or, env);
1052                         }
1053         } else {
1054                 prepare_links(node, env);
1055         }
1056 }
1057
1058 /**
1059  * Translate a special case Rotl(x, sizeof(w)).
1060  */
1061 static void lower_Rotl(ir_node *node, ir_mode *mode, lower_env_t *env) {
1062         ir_node *right = get_Rotl_right(node);
1063         ir_node *left = get_Rotl_left(node);
1064         ir_node *h, *l;
1065         int idx = get_irn_idx(left);
1066         (void) right;
1067         (void) mode;
1068
1069         assert(get_mode_arithmetic(mode) == irma_twos_complement &&
1070                is_Const(right) && tarval_is_long(get_Const_tarval(right)) &&
1071                get_tarval_long(get_Const_tarval(right)) == (long)get_mode_size_bits(mode));
1072
1073         l = env->entries[idx]->low_word;
1074         h = env->entries[idx]->high_word;
1075         idx = get_irn_idx(node);
1076
1077         env->entries[idx]->low_word  = h;
1078         env->entries[idx]->high_word = l;
1079 }  /* lower_Rotl */
1080
1081 /**
1082  * Translate an Unop.
1083  *
1084  * Create an intrinsic Call.
1085  */
1086 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env) {
1087         ir_node  *block, *irn;
1088         ir_node  *in[2];
1089         dbg_info *dbg;
1090         ir_type  *mtp;
1091         int      idx;
1092         node_entry_t *entry;
1093
1094         irn   = get_unop_op(node);
1095         entry = env->entries[get_irn_idx(irn)];
1096         assert(entry);
1097
1098         if (! entry->low_word) {
1099                 /* not ready yet, wait */
1100                 pdeq_putr(env->waitq, node);
1101                 return;
1102         }  /* if */
1103
1104         in[0] = entry->low_word;
1105         in[1] = entry->high_word;
1106
1107         dbg   = get_irn_dbg_info(node);
1108         block = get_nodes_block(node);
1109
1110         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1111         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
1112         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
1113                 irn, 2, in, mtp);
1114         set_irn_pinned(irn, get_irn_pinned(node));
1115         irn = new_r_Proj(block, irn, mode_T, pn_Call_T_result);
1116
1117         idx = get_irn_idx(node);
1118         assert(idx < env->n_entries);
1119         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
1120         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
1121 }  /* lower_Unop */
1122
1123 /**
1124  * Translate a logical Binop.
1125  *
1126  * Create two logical Binops.
1127  */
1128 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1129                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1130         ir_node  *block, *irn;
1131         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1132         dbg_info *dbg;
1133         int      idx;
1134         ir_graph *irg;
1135         node_entry_t *entry;
1136
1137         irn   = get_binop_left(node);
1138         entry = env->entries[get_irn_idx(irn)];
1139         assert(entry);
1140
1141         if (! entry->low_word) {
1142                 /* not ready yet, wait */
1143                 pdeq_putr(env->waitq, node);
1144                 return;
1145         }  /* if */
1146
1147         lop_l = entry->low_word;
1148         lop_h = entry->high_word;
1149
1150         irn   = get_binop_right(node);
1151         entry = env->entries[get_irn_idx(irn)];
1152         assert(entry);
1153
1154         if (! entry->low_word) {
1155                 /* not ready yet, wait */
1156                 pdeq_putr(env->waitq, node);
1157                 return;
1158         }  /* if */
1159
1160         rop_l = entry->low_word;
1161         rop_h = entry->high_word;
1162
1163         dbg = get_irn_dbg_info(node);
1164         block = get_nodes_block(node);
1165
1166         idx = get_irn_idx(node);
1167         assert(idx < env->n_entries);
1168         irg = current_ir_graph;
1169         env->entries[idx]->low_word  = constr_rd(dbg, block, lop_l, rop_l, env->params->low_unsigned);
1170         env->entries[idx]->high_word = constr_rd(dbg, block, lop_h, rop_h, mode);
1171 }  /* lower_Binop_logical */
1172
1173 /** create a logical operation transformation */
1174 #define lower_logical(op)                                                \
1175 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1176         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1177 }
1178
1179 lower_logical(And)
1180 lower_logical(Or)
1181 lower_logical(Eor)
1182
1183 /**
1184  * Translate a Not.
1185  *
1186  * Create two logical Nots.
1187  */
1188 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env) {
1189         ir_node  *block, *irn;
1190         ir_node  *op_l, *op_h;
1191         dbg_info *dbg;
1192         int      idx;
1193         node_entry_t *entry;
1194
1195         irn   = get_Not_op(node);
1196         entry = env->entries[get_irn_idx(irn)];
1197         assert(entry);
1198
1199         if (! entry->low_word) {
1200                 /* not ready yet, wait */
1201                 pdeq_putr(env->waitq, node);
1202                 return;
1203         }  /* if */
1204
1205         op_l = entry->low_word;
1206         op_h = entry->high_word;
1207
1208         dbg   = get_irn_dbg_info(node);
1209         block = get_nodes_block(node);
1210
1211         idx = get_irn_idx(node);
1212         assert(idx < env->n_entries);
1213         env->entries[idx]->low_word  = new_rd_Not(dbg, block, op_l, env->params->low_unsigned);
1214         env->entries[idx]->high_word = new_rd_Not(dbg, block, op_h, mode);
1215 }  /* lower_Not */
1216
1217 /**
1218  * Translate a Cond.
1219  */
1220 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
1221         ir_node *cmp, *left, *right, *block;
1222         ir_node *sel = get_Cond_selector(node);
1223         ir_mode *m = get_irn_mode(sel);
1224         int     idx;
1225         (void) mode;
1226
1227         if (m == mode_b) {
1228                 node_entry_t *lentry, *rentry;
1229                 ir_node  *proj, *projT = NULL, *projF = NULL;
1230                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1231                 ir_node  *projHF, *projHT;
1232                 ir_node  *dst_blk;
1233                 pn_Cmp   pnc;
1234                 ir_graph *irg;
1235                 dbg_info *dbg;
1236
1237                 if(!is_Proj(sel))
1238                         return;
1239
1240                 cmp   = get_Proj_pred(sel);
1241                 if(!is_Cmp(cmp))
1242                         return;
1243
1244                 left  = get_Cmp_left(cmp);
1245                 idx   = get_irn_idx(left);
1246                 lentry = env->entries[idx];
1247
1248                 if (! lentry) {
1249                         /* a normal Cmp */
1250                         return;
1251                 }  /* if */
1252
1253                 right = get_Cmp_right(cmp);
1254                 idx   = get_irn_idx(right);
1255                 rentry = env->entries[idx];
1256                 assert(rentry);
1257
1258                 if (! lentry->low_word || !rentry->low_word) {
1259                         /* not yet ready */
1260                         pdeq_putr(env->waitq, node);
1261                         return;
1262                 }  /* if */
1263
1264                 /* all right, build the code */
1265                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1266                         long proj_nr = get_Proj_proj(proj);
1267
1268                         if (proj_nr == pn_Cond_true) {
1269                                 assert(projT == NULL && "more than one Proj(true)");
1270                                 projT = proj;
1271                         } else {
1272                                 assert(proj_nr == pn_Cond_false);
1273                                 assert(projF == NULL && "more than one Proj(false)");
1274                                 projF = proj;
1275                         }  /* if */
1276                         mark_irn_visited(proj);
1277                 }  /* for */
1278                 assert(projT && projF);
1279
1280                 /* create a new high compare */
1281                 block = get_nodes_block(node);
1282                 irg   = get_Block_irg(block);
1283                 dbg   = get_irn_dbg_info(cmp);
1284                 pnc   = get_Proj_proj(sel);
1285
1286                 if (is_Const(right) && is_Const_null(right)) {
1287                         if (pnc == pn_Cmp_Eq || pnc == pn_Cmp_Lg) {
1288                                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1289                                 ir_mode *mode = env->params->low_unsigned;
1290                                 ir_node *low  = new_r_Conv(block, lentry->low_word, mode);
1291                                 ir_node *high = new_r_Conv(block, lentry->high_word, mode);
1292                                 ir_node *or   = new_rd_Or(dbg, block, low, high, mode);
1293                                 ir_node *cmp  = new_rd_Cmp(dbg, block, or, new_Const_long(mode, 0));
1294
1295                                 ir_node *proj = new_r_Proj(block, cmp, mode_b, pnc);
1296                                 set_Cond_selector(node, proj);
1297                                 return;
1298                         }
1299                 }
1300
1301                 cmpH = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word);
1302
1303                 if (pnc == pn_Cmp_Eq) {
1304                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1305                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1306
1307                         assert(entry);
1308                         dst_blk = entry->value;
1309
1310                         irn = new_r_Proj(block, cmpH, mode_b, pn_Cmp_Eq);
1311                         dbg = get_irn_dbg_info(node);
1312                         irn = new_rd_Cond(dbg, block, irn);
1313
1314                         projHF = new_r_Proj(block, irn, mode_X, pn_Cond_false);
1315                         mark_irn_visited(projHF);
1316                         exchange(projF, projHF);
1317
1318                         projHT = new_r_Proj(block, irn, mode_X, pn_Cond_true);
1319                         mark_irn_visited(projHT);
1320
1321                         new_bl = new_r_Block(irg, 1, &projHT);
1322
1323                         dbg   = get_irn_dbg_info(cmp);
1324                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1325                         irn = new_r_Proj(new_bl, cmpL, mode_b, pn_Cmp_Eq);
1326                         dbg = get_irn_dbg_info(node);
1327                         irn = new_rd_Cond(dbg, new_bl, irn);
1328
1329                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_false);
1330                         mark_irn_visited(proj);
1331                         add_block_cf_input(dst_blk, projHF, proj);
1332
1333                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_true);
1334                         mark_irn_visited(proj);
1335                         exchange(projT, proj);
1336                 } else if (pnc == pn_Cmp_Lg) {
1337                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1338                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1339
1340                         assert(entry);
1341                         dst_blk = entry->value;
1342
1343                         irn = new_r_Proj(block, cmpH, mode_b, pn_Cmp_Lg);
1344                         dbg = get_irn_dbg_info(node);
1345                         irn = new_rd_Cond(dbg, block, irn);
1346
1347                         projHT = new_r_Proj(block, irn, mode_X, pn_Cond_true);
1348                         mark_irn_visited(projHT);
1349                         exchange(projT, projHT);
1350
1351                         projHF = new_r_Proj(block, irn, mode_X, pn_Cond_false);
1352                         mark_irn_visited(projHF);
1353
1354                         new_bl = new_r_Block(irg, 1, &projHF);
1355
1356                         dbg   = get_irn_dbg_info(cmp);
1357                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1358                         irn = new_r_Proj(new_bl, cmpL, mode_b, pn_Cmp_Lg);
1359                         dbg = get_irn_dbg_info(node);
1360                         irn = new_rd_Cond(dbg, new_bl, irn);
1361
1362                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_true);
1363                         mark_irn_visited(proj);
1364                         add_block_cf_input(dst_blk, projHT, proj);
1365
1366                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_false);
1367                         mark_irn_visited(proj);
1368                         exchange(projF, proj);
1369                 } else {
1370                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1371                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1372                         pmap_entry *entry;
1373
1374                         entry = pmap_find(env->proj_2_block, projT);
1375                         assert(entry);
1376                         dstT = entry->value;
1377
1378                         entry = pmap_find(env->proj_2_block, projF);
1379                         assert(entry);
1380                         dstF = entry->value;
1381
1382                         irn = new_r_Proj(block, cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1383                         dbg = get_irn_dbg_info(node);
1384                         irn = new_rd_Cond(dbg, block, irn);
1385
1386                         projHT = new_r_Proj(block, irn, mode_X, pn_Cond_true);
1387                         mark_irn_visited(projHT);
1388                         exchange(projT, projHT);
1389                         projT = projHT;
1390
1391                         projHF = new_r_Proj(block, irn, mode_X, pn_Cond_false);
1392                         mark_irn_visited(projHF);
1393
1394                         newbl_eq = new_r_Block(irg, 1, &projHF);
1395
1396                         irn = new_r_Proj(block, cmpH, mode_b, pn_Cmp_Eq);
1397                         irn = new_rd_Cond(dbg, newbl_eq, irn);
1398
1399                         proj = new_r_Proj(newbl_eq, irn, mode_X, pn_Cond_false);
1400                         mark_irn_visited(proj);
1401                         exchange(projF, proj);
1402                         projF = proj;
1403
1404                         proj = new_r_Proj(newbl_eq, irn, mode_X, pn_Cond_true);
1405                         mark_irn_visited(proj);
1406
1407                         newbl_l = new_r_Block(irg, 1, &proj);
1408
1409                         dbg   = get_irn_dbg_info(cmp);
1410                         cmpL = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word);
1411                         irn = new_r_Proj(newbl_l, cmpL, mode_b, pnc);
1412                         dbg = get_irn_dbg_info(node);
1413                         irn = new_rd_Cond(dbg, newbl_l, irn);
1414
1415                         proj = new_r_Proj(newbl_l, irn, mode_X, pn_Cond_true);
1416                         mark_irn_visited(proj);
1417                         add_block_cf_input(dstT, projT, proj);
1418
1419                         proj = new_r_Proj(newbl_l, irn, mode_X, pn_Cond_false);
1420                         mark_irn_visited(proj);
1421                         add_block_cf_input(dstF, projF, proj);
1422                 }  /* if */
1423
1424                 /* we have changed the control flow */
1425                 env->flags |= CF_CHANGED;
1426         } else {
1427                 idx = get_irn_idx(sel);
1428
1429                 if (env->entries[idx]) {
1430                         /*
1431                            Bad, a jump-table with double-word index.
1432                            This should not happen, but if it does we handle
1433                            it like a Conv were between (in other words, ignore
1434                            the high part.
1435                          */
1436
1437                         if (! env->entries[idx]->low_word) {
1438                                 /* not ready yet, wait */
1439                                 pdeq_putr(env->waitq, node);
1440                                 return;
1441                         }  /* if */
1442                         set_Cond_selector(node, env->entries[idx]->low_word);
1443                 }  /* if */
1444         }  /* if */
1445 }  /* lower_Cond */
1446
1447 /**
1448  * Translate a Conv to higher_signed
1449  */
1450 static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
1451         ir_node  *op    = get_Conv_op(node);
1452         ir_mode  *imode = get_irn_mode(op);
1453         ir_mode  *dst_mode_l = env->params->low_unsigned;
1454         ir_mode  *dst_mode_h = env->params->low_signed;
1455         int      idx = get_irn_idx(node);
1456         ir_graph *irg = current_ir_graph;
1457         ir_node  *block = get_nodes_block(node);
1458         dbg_info *dbg = get_irn_dbg_info(node);
1459
1460         assert(idx < env->n_entries);
1461
1462         if (mode_is_int(imode) || mode_is_reference(imode)) {
1463                 if (imode == env->params->high_unsigned) {
1464                         /* a Conv from Lu to Ls */
1465                         int op_idx = get_irn_idx(op);
1466
1467                         if (! env->entries[op_idx]->low_word) {
1468                                 /* not ready yet, wait */
1469                                 pdeq_putr(env->waitq, node);
1470                                 return;
1471                         }  /* if */
1472                         env->entries[idx]->low_word  = new_rd_Conv(dbg, block, env->entries[op_idx]->low_word,  dst_mode_l);
1473                         env->entries[idx]->high_word = new_rd_Conv(dbg, block, env->entries[op_idx]->high_word, dst_mode_h);
1474                 } else {
1475                         /* simple case: create a high word */
1476                         if (imode != dst_mode_l)
1477                                 op = new_rd_Conv(dbg, block, op, dst_mode_l);
1478
1479                         env->entries[idx]->low_word  = op;
1480
1481                         if (mode_is_signed(imode)) {
1482                                 ir_node *op_conv = new_rd_Conv(dbg, block, op, dst_mode_h);
1483                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, block, op_conv,
1484                                         new_Const_long(dst_mode_l, get_mode_size_bits(dst_mode_h) - 1), dst_mode_h);
1485                         } else {
1486                                 env->entries[idx]->high_word = new_Const(get_mode_null(dst_mode_h));
1487                         }  /* if */
1488                 }  /* if */
1489         } else {
1490                 ir_node *irn, *call;
1491                 ir_mode *omode = env->params->high_signed;
1492                 ir_type *mtp = get_conv_type(imode, omode, env);
1493
1494                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1495                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1496                 set_irn_pinned(call, get_irn_pinned(node));
1497                 irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
1498
1499                 env->entries[idx]->low_word  = new_r_Proj(block, irn, dst_mode_l, 0);
1500                 env->entries[idx]->high_word = new_r_Proj(block, irn, dst_mode_h, 1);
1501         }  /* if */
1502 }  /* lower_Conv_to_Ls */
1503
1504 /**
1505  * Translate a Conv to higher_unsigned
1506  */
1507 static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
1508         ir_node  *op    = get_Conv_op(node);
1509         ir_mode  *imode = get_irn_mode(op);
1510         ir_mode  *dst_mode = env->params->low_unsigned;
1511         int      idx = get_irn_idx(node);
1512         ir_graph *irg = current_ir_graph;
1513         ir_node  *block = get_nodes_block(node);
1514         dbg_info *dbg = get_irn_dbg_info(node);
1515
1516         assert(idx < env->n_entries);
1517
1518         if (mode_is_int(imode) || mode_is_reference(imode)) {
1519                 if (imode == env->params->high_signed) {
1520                         /* a Conv from Ls to Lu */
1521                         int op_idx = get_irn_idx(op);
1522
1523                         if (! env->entries[op_idx]->low_word) {
1524                                 /* not ready yet, wait */
1525                                 pdeq_putr(env->waitq, node);
1526                                 return;
1527                         }  /* if */
1528                         env->entries[idx]->low_word  = new_rd_Conv(dbg, block, env->entries[op_idx]->low_word, dst_mode);
1529                         env->entries[idx]->high_word = new_rd_Conv(dbg, block, env->entries[op_idx]->high_word, dst_mode);
1530                 } else {
1531                         /* simple case: create a high word */
1532                         if (imode != dst_mode)
1533                                 op = new_rd_Conv(dbg, block, op, dst_mode);
1534
1535                         env->entries[idx]->low_word  = op;
1536
1537                         if (mode_is_signed(imode)) {
1538                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, block, op,
1539                                         new_Const_long(dst_mode, get_mode_size_bits(dst_mode) - 1), dst_mode);
1540                         } else {
1541                                 env->entries[idx]->high_word = new_Const(get_mode_null(dst_mode));
1542                         }  /* if */
1543                 }  /* if */
1544         } else {
1545                 ir_node *irn, *call;
1546                 ir_mode *omode = env->params->high_unsigned;
1547                 ir_type *mtp = get_conv_type(imode, omode, env);
1548
1549                 /* do an intrinsic call */
1550                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1551                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1552                 set_irn_pinned(call, get_irn_pinned(node));
1553                 irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
1554
1555                 env->entries[idx]->low_word  = new_r_Proj(block, irn, dst_mode, 0);
1556                 env->entries[idx]->high_word = new_r_Proj(block, irn, dst_mode, 1);
1557         }  /* if */
1558 }  /* lower_Conv_to_Lu */
1559
1560 /**
1561  * Translate a Conv from higher_signed
1562  */
1563 static void lower_Conv_from_Ls(ir_node *node, lower_env_t *env) {
1564         ir_node  *op    = get_Conv_op(node);
1565         ir_mode  *omode = get_irn_mode(node);
1566         ir_node  *block = get_nodes_block(node);
1567         dbg_info *dbg = get_irn_dbg_info(node);
1568         int      idx = get_irn_idx(op);
1569         ir_graph *irg = current_ir_graph;
1570
1571         assert(idx < env->n_entries);
1572
1573         if (! env->entries[idx]->low_word) {
1574                 /* not ready yet, wait */
1575                 pdeq_putr(env->waitq, node);
1576                 return;
1577         }  /* if */
1578
1579         if (mode_is_int(omode) || mode_is_reference(omode)) {
1580                 op = env->entries[idx]->low_word;
1581
1582                 /* simple case: create a high word */
1583                 if (omode != env->params->low_signed)
1584                         op = new_rd_Conv(dbg, block, op, omode);
1585
1586                 set_Conv_op(node, op);
1587         } else {
1588                 ir_node *irn, *call, *in[2];
1589                 ir_mode *imode = env->params->high_signed;
1590                 ir_type *mtp = get_conv_type(imode, omode, env);
1591
1592                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1593                 in[0] = env->entries[idx]->low_word;
1594                 in[1] = env->entries[idx]->high_word;
1595
1596                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1597                 set_irn_pinned(call, get_irn_pinned(node));
1598                 irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
1599
1600                 exchange(node, new_r_Proj(block, irn, omode, 0));
1601         }  /* if */
1602 }  /* lower_Conv_from_Ls */
1603
1604 /**
1605  * Translate a Conv from higher_unsigned
1606  */
1607 static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
1608         ir_node  *op    = get_Conv_op(node);
1609         ir_mode  *omode = get_irn_mode(node);
1610         ir_node  *block = get_nodes_block(node);
1611         dbg_info *dbg = get_irn_dbg_info(node);
1612         int      idx = get_irn_idx(op);
1613         ir_graph *irg = current_ir_graph;
1614
1615         assert(idx < env->n_entries);
1616
1617         if (! env->entries[idx]->low_word) {
1618                 /* not ready yet, wait */
1619                 pdeq_putr(env->waitq, node);
1620                 return;
1621         }  /* if */
1622
1623         if (mode_is_int(omode) || mode_is_reference(omode)) {
1624                 op = env->entries[idx]->low_word;
1625
1626                 /* simple case: create a high word */
1627                 if (omode != env->params->low_unsigned)
1628                         op = new_rd_Conv(dbg, block, op, omode);
1629
1630                 set_Conv_op(node, op);
1631         } else {
1632                 ir_node *irn, *call, *in[2];
1633                 ir_mode *imode = env->params->high_unsigned;
1634                 ir_type *mtp = get_conv_type(imode, omode, env);
1635
1636                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1637                 in[0] = env->entries[idx]->low_word;
1638                 in[1] = env->entries[idx]->high_word;
1639
1640                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1641                 set_irn_pinned(call, get_irn_pinned(node));
1642                 irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
1643
1644                 exchange(node, new_r_Proj(block, irn, omode, 0));
1645         }  /* if */
1646 }  /* lower_Conv_from_Lu */
1647
1648 /**
1649  * Translate a Conv.
1650  */
1651 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env) {
1652         mode = get_irn_mode(node);
1653
1654         if (mode == env->params->high_signed) {
1655                 lower_Conv_to_Ls(node, env);
1656         } else if (mode == env->params->high_unsigned) {
1657                 lower_Conv_to_Lu(node, env);
1658         } else {
1659                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1660
1661                 if (mode == env->params->high_signed) {
1662                         lower_Conv_from_Ls(node, env);
1663                 } else if (mode == env->params->high_unsigned) {
1664                         lower_Conv_from_Lu(node, env);
1665                 }  /* if */
1666         }  /* if */
1667 }  /* lower_Conv */
1668
1669 /**
1670  * Lower the method type.
1671  *
1672  * @param mtp  the method type to lower
1673  * @param ent  the lower environment
1674  *
1675  * @return the lowered type
1676  */
1677 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
1678         pmap_entry *entry;
1679         ident      *lid;
1680         ir_type    *res, *value_type;
1681
1682         if (is_lowered_type(mtp))
1683                 return mtp;
1684
1685         entry = pmap_find(lowered_type, mtp);
1686         if (! entry) {
1687                 int i, n, r, n_param, n_res;
1688
1689                 /* count new number of params */
1690                 n_param = n = get_method_n_params(mtp);
1691                 for (i = n_param - 1; i >= 0; --i) {
1692                         ir_type *tp = get_method_param_type(mtp, i);
1693
1694                         if (is_Primitive_type(tp)) {
1695                                 ir_mode *mode = get_type_mode(tp);
1696
1697                                 if (mode == env->params->high_signed ||
1698                                         mode == env->params->high_unsigned)
1699                                         ++n_param;
1700                         }  /* if */
1701                 }  /* for */
1702
1703                 /* count new number of results */
1704                 n_res = r = get_method_n_ress(mtp);
1705                 for (i = n_res - 1; i >= 0; --i) {
1706                         ir_type *tp = get_method_res_type(mtp, i);
1707
1708                         if (is_Primitive_type(tp)) {
1709                                 ir_mode *mode = get_type_mode(tp);
1710
1711                                 if (mode == env->params->high_signed ||
1712                                         mode == env->params->high_unsigned)
1713                                         ++n_res;
1714                         }  /* if */
1715                 }  /* for */
1716
1717                 res = new_type_method(n_param, n_res);
1718
1719                 /* set param types and result types */
1720                 for (i = n_param = 0; i < n; ++i) {
1721                         ir_type *tp = get_method_param_type(mtp, i);
1722
1723                         if (is_Primitive_type(tp)) {
1724                                 ir_mode *mode = get_type_mode(tp);
1725
1726                                 if (mode == env->params->high_signed) {
1727                                         set_method_param_type(res, n_param++, tp_u);
1728                                         set_method_param_type(res, n_param++, tp_s);
1729                                 } else if (mode == env->params->high_unsigned) {
1730                                         set_method_param_type(res, n_param++, tp_u);
1731                                         set_method_param_type(res, n_param++, tp_u);
1732                                 } else {
1733                                         set_method_param_type(res, n_param++, tp);
1734                                 }  /* if */
1735                         } else {
1736                                 set_method_param_type(res, n_param++, tp);
1737                         }  /* if */
1738                 }  /* for */
1739                 for (i = n_res = 0; i < r; ++i) {
1740                         ir_type *tp = get_method_res_type(mtp, i);
1741
1742                         if (is_Primitive_type(tp)) {
1743                                 ir_mode *mode = get_type_mode(tp);
1744
1745                                 if (mode == env->params->high_signed) {
1746                                         set_method_res_type(res, n_res++, tp_u);
1747                                         set_method_res_type(res, n_res++, tp_s);
1748                                 } else if (mode == env->params->high_unsigned) {
1749                                         set_method_res_type(res, n_res++, tp_u);
1750                                         set_method_res_type(res, n_res++, tp_u);
1751                                 } else {
1752                                         set_method_res_type(res, n_res++, tp);
1753                                 }  /* if */
1754                         } else {
1755                                 set_method_res_type(res, n_res++, tp);
1756                         }  /* if */
1757                 }  /* for */
1758                 set_lowered_type(mtp, res);
1759                 pmap_insert(lowered_type, mtp, res);
1760
1761                 value_type = get_method_value_param_type(mtp);
1762                 if (value_type != NULL) {
1763                         /* this creates a new value parameter type */
1764                         (void)get_method_value_param_ent(res, 0);
1765
1766                         /* set new param positions */
1767                         for (i = n_param = 0; i < n; ++i) {
1768                                 ir_type   *tp  = get_method_param_type(mtp, i);
1769                                 ident     *id  = get_method_param_ident(mtp, i);
1770                                 ir_entity *ent = get_method_value_param_ent(mtp, i);
1771
1772                                 set_entity_link(ent, INT_TO_PTR(n_param));
1773                                 if (is_Primitive_type(tp)) {
1774                                         ir_mode *mode = get_type_mode(tp);
1775
1776                                         if (mode == env->params->high_signed || mode == env->params->high_unsigned) {
1777                                                 if (id != NULL) {
1778                                                         lid = id_mangle(id, env->first_id);
1779                                                         set_method_param_ident(res, n_param, lid);
1780                                                         set_entity_ident(get_method_value_param_ent(res, n_param), lid);
1781                                                         lid = id_mangle(id, env->next_id);
1782                                                         set_method_param_ident(res, n_param + 1, lid);
1783                                                         set_entity_ident(get_method_value_param_ent(res, n_param + 1), lid);
1784                                                 }  /* if */
1785                                                 n_param += 2;
1786                                                 continue;
1787                                         }  /* if */
1788                                 }  /* if */
1789                                 if (id != NULL) {
1790                                         set_method_param_ident(res, n_param, id);
1791                                         set_entity_ident(get_method_value_param_ent(res, n_param), id);
1792                                 }  /* if */
1793                                 ++n_param;
1794                         }  /* for */
1795
1796                         set_lowered_type(value_type, get_method_value_param_type(res));
1797                 }  /* if */
1798         } else {
1799                 res = entry->value;
1800         }  /* if */
1801         return res;
1802 }  /* lower_mtp */
1803
1804 /**
1805  * Translate a Return.
1806  */
1807 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
1808         ir_graph  *irg = current_ir_graph;
1809         ir_entity *ent = get_irg_entity(irg);
1810         ir_type   *mtp = get_entity_type(ent);
1811         ir_node   **in;
1812         int       i, j, n, idx;
1813         int       need_conv = 0;
1814         (void) mode;
1815
1816         /* check if this return must be lowered */
1817         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1818                 ir_node *pred = get_Return_res(node, i);
1819                 ir_mode *mode = get_irn_op_mode(pred);
1820
1821                 if (mode == env->params->high_signed ||
1822                         mode == env->params->high_unsigned) {
1823                         idx = get_irn_idx(pred);
1824                         if (! env->entries[idx]->low_word) {
1825                                 /* not ready yet, wait */
1826                                 pdeq_putr(env->waitq, node);
1827                                 return;
1828                         }  /* if */
1829                         need_conv = 1;
1830                 }  /* if */
1831         }  /* for */
1832         if (! need_conv)
1833                 return;
1834
1835         ent = get_irg_entity(irg);
1836         mtp = get_entity_type(ent);
1837
1838         mtp = lower_mtp(mtp, env);
1839         set_entity_type(ent, mtp);
1840
1841         /* create a new in array */
1842         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1843         in[0] = get_Return_mem(node);
1844
1845         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1846                 ir_node *pred = get_Return_res(node, i);
1847
1848                 idx = get_irn_idx(pred);
1849                 assert(idx < env->n_entries);
1850
1851                 if (env->entries[idx]) {
1852                         in[++j] = env->entries[idx]->low_word;
1853                         in[++j] = env->entries[idx]->high_word;
1854                 } else {
1855                         in[++j] = pred;
1856                 }  /* if */
1857         }  /* for */
1858
1859         set_irn_in(node, j+1, in);
1860 }  /* lower_Return */
1861
1862 /**
1863  * Translate the parameters.
1864  */
1865 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env) {
1866         ir_graph  *irg = get_irn_irg(node);
1867         ir_entity *ent = get_irg_entity(irg);
1868         ir_type   *tp  = get_entity_type(ent);
1869         ir_type   *mtp;
1870         long      *new_projs;
1871         int       i, j, n_params, rem;
1872         ir_node   *proj, *args;
1873         (void) mode;
1874
1875         if (is_lowered_type(tp)) {
1876                 mtp = get_associated_type(tp);
1877         } else {
1878                 mtp = tp;
1879         }  /* if */
1880         assert(! is_lowered_type(mtp));
1881
1882         n_params = get_method_n_params(mtp);
1883         if (n_params <= 0)
1884                 return;
1885
1886         NEW_ARR_A(long, new_projs, n_params);
1887
1888         /* first check if we have parameters that must be fixed */
1889         for (i = j = 0; i < n_params; ++i, ++j) {
1890                 ir_type *tp = get_method_param_type(mtp, i);
1891
1892                 new_projs[i] = j;
1893                 if (is_Primitive_type(tp)) {
1894                         ir_mode *mode = get_type_mode(tp);
1895
1896                         if (mode == env->params->high_signed ||
1897                                 mode == env->params->high_unsigned)
1898                                 ++j;
1899                 }  /* if */
1900         }  /* for */
1901         if (i == j)
1902                 return;
1903
1904         mtp = lower_mtp(mtp, env);
1905         set_entity_type(ent, mtp);
1906
1907         /* switch off optimization for new Proj nodes or they might be CSE'ed
1908            with not patched one's */
1909         rem = get_optimize();
1910         set_optimize(0);
1911
1912         /* ok, fix all Proj's and create new ones */
1913         args = get_irg_args(irg);
1914         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1915                 ir_node *pred = get_Proj_pred(proj);
1916                 long proj_nr;
1917                 int idx;
1918                 ir_mode *mode;
1919                 dbg_info *dbg;
1920
1921                 /* do not visit this node again */
1922                 mark_irn_visited(proj);
1923
1924                 if (pred != args)
1925                         continue;
1926
1927                 proj_nr = get_Proj_proj(proj);
1928                 set_Proj_proj(proj, new_projs[proj_nr]);
1929
1930                 idx = get_irn_idx(proj);
1931                 if (env->entries[idx]) {
1932                         ir_mode *low_mode = env->params->low_unsigned;
1933
1934                         mode = get_irn_mode(proj);
1935
1936                         if (mode == env->params->high_signed) {
1937                                 mode = env->params->low_signed;
1938                         } else {
1939                                 mode = env->params->low_unsigned;
1940                         }  /* if */
1941
1942                         dbg = get_irn_dbg_info(proj);
1943                         env->entries[idx]->low_word  =
1944                                 new_rd_Proj(dbg, get_nodes_block(proj), args, low_mode, new_projs[proj_nr]);
1945                         env->entries[idx]->high_word =
1946                                 new_rd_Proj(dbg, get_nodes_block(proj), args, mode, new_projs[proj_nr] + 1);
1947                 }  /* if */
1948         }  /* for */
1949         set_optimize(rem);
1950 }  /* lower_Start */
1951
1952 /**
1953  * Translate a Call.
1954  */
1955 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
1956         ir_type  *tp = get_Call_type(node);
1957         ir_type  *call_tp;
1958         ir_node  **in, *proj, *results;
1959         int      n_params, n_res, need_lower = 0;
1960         int      i, j;
1961         long     *res_numbers = NULL;
1962         (void) mode;
1963
1964         if (is_lowered_type(tp)) {
1965                 call_tp = get_associated_type(tp);
1966         } else {
1967                 call_tp = tp;
1968         }  /* if */
1969
1970         assert(! is_lowered_type(call_tp));
1971
1972         n_params = get_method_n_params(call_tp);
1973         for (i = 0; i < n_params; ++i) {
1974                 ir_type *tp = get_method_param_type(call_tp, i);
1975
1976                 if (is_Primitive_type(tp)) {
1977                         ir_mode *mode = get_type_mode(tp);
1978
1979                         if (mode == env->params->high_signed ||
1980                                 mode == env->params->high_unsigned) {
1981                                 need_lower = 1;
1982                                 break;
1983                         }  /* if */
1984                 }  /* if */
1985         }  /* for */
1986         n_res = get_method_n_ress(call_tp);
1987         if (n_res > 0) {
1988                 NEW_ARR_A(long, res_numbers, n_res);
1989
1990                 for (i = j = 0; i < n_res; ++i, ++j) {
1991                         ir_type *tp = get_method_res_type(call_tp, i);
1992
1993                         res_numbers[i] = j;
1994                         if (is_Primitive_type(tp)) {
1995                                 ir_mode *mode = get_type_mode(tp);
1996
1997                                 if (mode == env->params->high_signed ||
1998                                         mode == env->params->high_unsigned) {
1999                                         need_lower = 1;
2000                                         ++j;
2001                                 }  /* if */
2002                         }  /* if */
2003                 }  /* for */
2004         }  /* if */
2005
2006         if (! need_lower)
2007                 return;
2008
2009         /* let's lower it */
2010         call_tp = lower_mtp(call_tp, env);
2011         set_Call_type(node, call_tp);
2012
2013         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
2014
2015         in[0] = get_Call_mem(node);
2016         in[1] = get_Call_ptr(node);
2017
2018         for (j = 2, i = 0; i < n_params; ++i) {
2019                 ir_node *pred = get_Call_param(node, i);
2020                 int     idx = get_irn_idx(pred);
2021
2022                 if (env->entries[idx]) {
2023                         if (! env->entries[idx]->low_word) {
2024                                 /* not ready yet, wait */
2025                                 pdeq_putr(env->waitq, node);
2026                                 return;
2027                         }
2028                         in[j++] = env->entries[idx]->low_word;
2029                         in[j++] = env->entries[idx]->high_word;
2030                 } else {
2031                         in[j++] = pred;
2032                 }  /* if */
2033         }  /* for */
2034
2035         set_irn_in(node, j, in);
2036
2037         /* fix the results */
2038         results = NULL;
2039         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
2040                 long proj_nr = get_Proj_proj(proj);
2041
2042                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
2043                         /* found the result proj */
2044                         results = proj;
2045                         break;
2046                 }  /* if */
2047         }  /* for */
2048
2049         if (results) {          /* there are results */
2050                 int rem = get_optimize();
2051
2052                 /* switch off optimization for new Proj nodes or they might be CSE'ed
2053                    with not patched one's */
2054                 set_optimize(0);
2055                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
2056                         if (get_Proj_pred(proj) == results) {
2057                                 long proj_nr = get_Proj_proj(proj);
2058                                 int idx;
2059
2060                                 /* found a result */
2061                                 set_Proj_proj(proj, res_numbers[proj_nr]);
2062                                 idx = get_irn_idx(proj);
2063                                 if (env->entries[idx]) {
2064                                         ir_mode *mode = get_irn_mode(proj);
2065                                         ir_mode *low_mode = env->params->low_unsigned;
2066                                         dbg_info *dbg;
2067
2068                                         if (mode == env->params->high_signed) {
2069                                                 mode = env->params->low_signed;
2070                                         } else {
2071                                                 mode = env->params->low_unsigned;
2072                                         }  /* if */
2073
2074                                         dbg = get_irn_dbg_info(proj);
2075                                         env->entries[idx]->low_word  =
2076                                                 new_rd_Proj(dbg, get_nodes_block(proj), results, low_mode, res_numbers[proj_nr]);
2077                                         env->entries[idx]->high_word =
2078                                                 new_rd_Proj(dbg, get_nodes_block(proj), results, mode, res_numbers[proj_nr] + 1);
2079                                 }  /* if */
2080                                 mark_irn_visited(proj);
2081                         }  /* if */
2082                 }  /* for */
2083                 set_optimize(rem);
2084         }
2085 }  /* lower_Call */
2086
2087 /**
2088  * Translate an Unknown into two.
2089  */
2090 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env) {
2091         int      idx = get_irn_idx(node);
2092         ir_graph *irg = get_irn_irg(node);
2093         ir_mode  *low_mode = env->params->low_unsigned;
2094
2095         env->entries[idx]->low_word  = new_r_Unknown(irg, low_mode);
2096         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2097 }  /* lower_Unknown */
2098
2099 /**
2100  * Translate a Phi.
2101  *
2102  * First step: just create two templates
2103  */
2104 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
2105         ir_mode  *mode_l = env->params->low_unsigned;
2106         ir_graph *irg = get_irn_irg(phi);
2107         ir_node  *block, *unk_l, *unk_h, *phi_l, *phi_h;
2108         ir_node  **inl, **inh;
2109         dbg_info *dbg;
2110         int      idx, i, arity = get_Phi_n_preds(phi);
2111         int      enq = 0;
2112
2113         idx = get_irn_idx(phi);
2114         if (env->entries[idx]->low_word) {
2115                 /* Phi nodes already build, check for inputs */
2116                 ir_node *phil = env->entries[idx]->low_word;
2117                 ir_node *phih = env->entries[idx]->high_word;
2118
2119                 for (i = 0; i < arity; ++i) {
2120                         ir_node *pred = get_Phi_pred(phi, i);
2121                         int     idx = get_irn_idx(pred);
2122
2123                         if (env->entries[idx]->low_word) {
2124                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2125                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2126                         } else {
2127                                 /* still not ready */
2128                                 pdeq_putr(env->waitq, phi);
2129                                 return;
2130                         }  /* if */
2131                 }  /* for */
2132         }  /* if */
2133
2134         /* first create a new in array */
2135         NEW_ARR_A(ir_node *, inl, arity);
2136         NEW_ARR_A(ir_node *, inh, arity);
2137         unk_l = new_r_Unknown(irg, mode_l);
2138         unk_h = new_r_Unknown(irg, mode);
2139
2140         for (i = 0; i < arity; ++i) {
2141                 ir_node *pred = get_Phi_pred(phi, i);
2142                 int     idx = get_irn_idx(pred);
2143
2144                 if (env->entries[idx]->low_word) {
2145                         inl[i] = env->entries[idx]->low_word;
2146                         inh[i] = env->entries[idx]->high_word;
2147                 } else {
2148                         inl[i] = unk_l;
2149                         inh[i] = unk_h;
2150                         enq = 1;
2151                 }  /* if */
2152         }  /* for */
2153
2154         dbg   = get_irn_dbg_info(phi);
2155         block = get_nodes_block(phi);
2156
2157         idx = get_irn_idx(phi);
2158         assert(idx < env->n_entries);
2159         env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, block, arity, inl, mode_l);
2160         env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, block, arity, inh, mode);
2161
2162         /* Don't forget to link the new Phi nodes into the block.
2163          * Beware that some Phis might be optimized away. */
2164         if (is_Phi(phi_l))
2165                 add_Block_phi(block, phi_l);
2166         if (is_Phi(phi_h))
2167                 add_Block_phi(block, phi_h);
2168
2169         if (enq) {
2170                 /* not yet finished */
2171                 pdeq_putr(env->waitq, phi);
2172         }  /* if */
2173 }  /* lower_Phi */
2174
2175 /**
2176  * Translate a Mux.
2177  */
2178 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env) {
2179         ir_node  *block, *val;
2180         ir_node  *true_l, *true_h, *false_l, *false_h, *sel;
2181         dbg_info *dbg;
2182         int      idx;
2183
2184         val = get_Mux_true(mux);
2185         idx = get_irn_idx(val);
2186         if (env->entries[idx]->low_word) {
2187                 /* Values already build */
2188                 true_l = env->entries[idx]->low_word;
2189                 true_h = env->entries[idx]->high_word;
2190         } else {
2191                 /* still not ready */
2192                 pdeq_putr(env->waitq, mux);
2193                 return;
2194         }  /* if */
2195
2196         val = get_Mux_false(mux);
2197         idx = get_irn_idx(val);
2198         if (env->entries[idx]->low_word) {
2199                 /* Values already build */
2200                 false_l = env->entries[idx]->low_word;
2201                 false_h = env->entries[idx]->high_word;
2202         } else {
2203                 /* still not ready */
2204                 pdeq_putr(env->waitq, mux);
2205                 return;
2206         }  /* if */
2207
2208
2209         sel = get_Mux_sel(mux);
2210
2211         dbg   = get_irn_dbg_info(mux);
2212         block = get_nodes_block(mux);
2213
2214         idx = get_irn_idx(mux);
2215         assert(idx < env->n_entries);
2216         env->entries[idx]->low_word  = new_rd_Mux(dbg, block, sel, false_l, true_l, mode);
2217         env->entries[idx]->high_word = new_rd_Mux(dbg, block, sel, false_h, true_h, mode);
2218 }  /* lower_Mux */
2219
2220 /**
2221  * Translate an ASM node.
2222  */
2223 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env) {
2224         ir_mode *his = env->params->high_signed;
2225         ir_mode *hiu = env->params->high_unsigned;
2226         int      i;
2227         ir_node *n;
2228
2229         (void)mode;
2230
2231         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2232                 ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
2233                 if (op_mode == his || op_mode == hiu) {
2234                         panic("lowering ASM unimplemented");
2235                 }  /* if */
2236         }  /* for */
2237
2238         for (n = asmn;;) {
2239                 ir_mode *proj_mode;
2240
2241                 n = get_irn_link(n);
2242                 if (n == NULL)
2243                         break;
2244
2245                 proj_mode = get_irn_mode(n);
2246                 if (proj_mode == his || proj_mode == hiu) {
2247                         panic("lowering ASM unimplemented");
2248                 }  /* if */
2249         }  /* for */
2250 }  /* lower_ASM */
2251
2252 /**
2253  * Translate a Sel node.
2254  */
2255 static void lower_Sel(ir_node *sel, ir_mode *mode, lower_env_t *env) {
2256         (void) mode;
2257
2258         /* we must only lower value parameter Sels if we change the
2259            value parameter type. */
2260         if (env->value_param_tp != NULL) {
2261                 ir_entity *ent = get_Sel_entity(sel);
2262             if (get_entity_owner(ent) == env->value_param_tp) {
2263                         int pos = PTR_TO_INT(get_entity_link(ent));
2264
2265                         ent = get_method_value_param_ent(env->l_mtp, pos);
2266                         set_Sel_entity(sel, ent);
2267                 }  /* if */
2268         }  /* if */
2269 }  /* lower_Sel */
2270
2271 /**
2272  * check for opcodes that must always be lowered.
2273  */
2274 static int always_lower(ir_opcode code) {
2275         switch (code) {
2276         case iro_ASM:
2277         case iro_Proj:
2278         case iro_Start:
2279         case iro_Call:
2280         case iro_Return:
2281         case iro_Cond:
2282         case iro_Conv:
2283         case iro_Sel:
2284                 return 1;
2285         default:
2286                 return 0;
2287         }  /* switch */
2288 }  /* always_lower */
2289
2290 /**
2291  * lower boolean Proj(Cmp)
2292  */
2293 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env) {
2294         int      lidx, ridx;
2295         ir_node  *l, *r, *low, *high, *t, *res;
2296         pn_Cmp   pnc;
2297         ir_node  *blk;
2298         dbg_info *db;
2299
2300         l    = get_Cmp_left(cmp);
2301         lidx = get_irn_idx(l);
2302         if (! env->entries[lidx]->low_word) {
2303                 /* still not ready */
2304                 return NULL;
2305         }  /* if */
2306
2307         r    = get_Cmp_right(cmp);
2308         ridx = get_irn_idx(r);
2309         if (! env->entries[ridx]->low_word) {
2310                 /* still not ready */
2311                 return NULL;
2312         }  /* if */
2313
2314         pnc  = get_Proj_proj(proj);
2315         blk  = get_nodes_block(cmp);
2316         db   = get_irn_dbg_info(cmp);
2317         low  = new_rd_Cmp(db, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2318         high = new_rd_Cmp(db, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2319
2320         if (pnc == pn_Cmp_Eq) {
2321                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2322                 res = new_rd_And(db, blk,
2323                         new_r_Proj(blk, low, mode_b, pnc),
2324                         new_r_Proj(blk, high, mode_b, pnc),
2325                         mode_b);
2326         } else if (pnc == pn_Cmp_Lg) {
2327                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2328                 res = new_rd_Or(db, blk,
2329                         new_r_Proj(blk, low, mode_b, pnc),
2330                         new_r_Proj(blk, high, mode_b, pnc),
2331                         mode_b);
2332         } else {
2333                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2334                 t = new_rd_And(db, blk,
2335                         new_r_Proj(blk, low, mode_b, pnc),
2336                         new_r_Proj(blk, high, mode_b, pn_Cmp_Eq),
2337                         mode_b);
2338                 res = new_rd_Or(db, blk,
2339                         new_r_Proj(blk, high, mode_b, pnc & ~pn_Cmp_Eq),
2340                         t,
2341                         mode_b);
2342         }  /* if */
2343         return res;
2344 }  /* lower_boolean_Proj_Cmp */
2345
2346 /**
2347  * The type of a lower function.
2348  *
2349  * @param node   the node to be lowered
2350  * @param mode   the low mode for the destination node
2351  * @param env    the lower environment
2352  */
2353 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2354
2355 /**
2356  * Lower a node.
2357  */
2358 static void lower_ops(ir_node *node, void *env)
2359 {
2360         lower_env_t  *lenv = env;
2361         node_entry_t *entry;
2362         int          idx = get_irn_idx(node);
2363         ir_mode      *mode = get_irn_mode(node);
2364
2365         if (mode == mode_b || is_Mux(node) || is_Conv(node)) {
2366                 int i;
2367
2368                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2369                         ir_node *proj = get_irn_n(node, i);
2370
2371                         if (is_Proj(proj)) {
2372                                 ir_node *cmp = get_Proj_pred(proj);
2373
2374                                 if (is_Cmp(cmp)) {
2375                                         ir_node *arg = get_Cmp_left(cmp);
2376
2377                                         mode = get_irn_mode(arg);
2378                                         if (mode == lenv->params->high_signed ||
2379                                                 mode == lenv->params->high_unsigned) {
2380                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2381
2382                                                 if (res == NULL) {
2383                                                         /* could not lower because predecessors not ready */
2384                                                         waitq_put(lenv->waitq, node);
2385                                                         return;
2386                                                 }  /* if */
2387                                                 set_irn_n(node, i, res);
2388                                         }  /* if */
2389                                 }  /* if */
2390                         }  /* if */
2391                 }  /* for */
2392         }  /* if */
2393
2394         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2395         if (entry || always_lower(get_irn_opcode(node))) {
2396                 ir_op      *op = get_irn_op(node);
2397                 lower_func func = (lower_func)op->ops.generic;
2398
2399                 if (func) {
2400                         mode = get_irn_op_mode(node);
2401
2402                         if (mode == lenv->params->high_signed)
2403                                 mode = lenv->params->low_signed;
2404                         else
2405                                 mode = lenv->params->low_unsigned;
2406
2407                         DB((dbg, LEVEL_1, "  %+F\n", node));
2408                         func(node, mode, lenv);
2409                 }  /* if */
2410         }  /* if */
2411 }  /* lower_ops */
2412
2413 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2414
2415 /**
2416  * Compare two op_mode_entry_t's.
2417  */
2418 static int cmp_op_mode(const void *elt, const void *key, size_t size) {
2419         const op_mode_entry_t *e1 = elt;
2420         const op_mode_entry_t *e2 = key;
2421         (void) size;
2422
2423         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2424 }  /* cmp_op_mode */
2425
2426 /**
2427  * Compare two conv_tp_entry_t's.
2428  */
2429 static int cmp_conv_tp(const void *elt, const void *key, size_t size) {
2430         const conv_tp_entry_t *e1 = elt;
2431         const conv_tp_entry_t *e2 = key;
2432         (void) size;
2433
2434         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2435 }  /* cmp_conv_tp */
2436
2437 /**
2438  * Enter a lowering function into an ir_op.
2439  */
2440 static void enter_lower_func(ir_op *op, lower_func func) {
2441         op->ops.generic = (op_func)func;
2442 }  /* enter_lower_func */
2443
2444 /**
2445  * Returns non-zero if a method type must be lowered.
2446  *
2447  * @param mtp  the method type
2448  */
2449 static int mtp_must_to_lowered(ir_type *mtp, lower_env_t *env) {
2450         int i, n_params;
2451
2452         n_params = get_method_n_params(mtp);
2453         if (n_params <= 0)
2454                 return 0;
2455
2456         /* first check if we have parameters that must be fixed */
2457         for (i = 0; i < n_params; ++i) {
2458                 ir_type *tp = get_method_param_type(mtp, i);
2459
2460                 if (is_Primitive_type(tp)) {
2461                         ir_mode *mode = get_type_mode(tp);
2462
2463                         if (mode == env->params->high_signed ||
2464                                 mode == env->params->high_unsigned)
2465                                 return 1;
2466                 }  /* if */
2467         }  /* for */
2468         return 0;
2469 }  /* mtp_must_to_lowered */
2470
2471 /*
2472  * Do the lowering.
2473  */
2474 void lower_dw_ops(const lwrdw_param_t *param)
2475 {
2476         lower_env_t lenv;
2477         int         i;
2478         ir_graph    *rem;
2479
2480         if (! param)
2481                 return;
2482
2483         if (! param->enable)
2484                 return;
2485
2486         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2487
2488         assert(2 * get_mode_size_bits(param->low_signed)   == get_mode_size_bits(param->high_signed));
2489         assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
2490         assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
2491
2492         /* create the necessary maps */
2493         if (! prim_types)
2494                 prim_types = pmap_create();
2495         if (! intrinsic_fkt)
2496                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2497         if (! conv_types)
2498                 conv_types = new_set(cmp_conv_tp, 16);
2499         if (! lowered_type)
2500                 lowered_type = pmap_create();
2501
2502         /* create a primitive unsigned and signed type */
2503         if (! tp_u)
2504                 tp_u = get_primitive_type(param->low_unsigned);
2505         if (! tp_s)
2506                 tp_s = get_primitive_type(param->low_signed);
2507
2508         /* create method types for the created binop calls */
2509         if (! binop_tp_u) {
2510                 binop_tp_u = new_type_method(4, 2);
2511                 set_method_param_type(binop_tp_u, 0, tp_u);
2512                 set_method_param_type(binop_tp_u, 1, tp_u);
2513                 set_method_param_type(binop_tp_u, 2, tp_u);
2514                 set_method_param_type(binop_tp_u, 3, tp_u);
2515                 set_method_res_type(binop_tp_u, 0, tp_u);
2516                 set_method_res_type(binop_tp_u, 1, tp_u);
2517         }  /* if */
2518         if (! binop_tp_s) {
2519                 binop_tp_s = new_type_method(4, 2);
2520                 set_method_param_type(binop_tp_s, 0, tp_u);
2521                 set_method_param_type(binop_tp_s, 1, tp_s);
2522                 set_method_param_type(binop_tp_s, 2, tp_u);
2523                 set_method_param_type(binop_tp_s, 3, tp_s);
2524                 set_method_res_type(binop_tp_s, 0, tp_u);
2525                 set_method_res_type(binop_tp_s, 1, tp_s);
2526         }  /* if */
2527         if (! shiftop_tp_u) {
2528                 shiftop_tp_u = new_type_method(3, 2);
2529                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2530                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2531                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2532                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2533                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2534         }  /* if */
2535         if (! shiftop_tp_s) {
2536                 shiftop_tp_s = new_type_method(3, 2);
2537                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2538                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2539                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2540                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2541                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2542         }  /* if */
2543         if (! unop_tp_u) {
2544                 unop_tp_u = new_type_method(2, 2);
2545                 set_method_param_type(unop_tp_u, 0, tp_u);
2546                 set_method_param_type(unop_tp_u, 1, tp_u);
2547                 set_method_res_type(unop_tp_u, 0, tp_u);
2548                 set_method_res_type(unop_tp_u, 1, tp_u);
2549         }  /* if */
2550         if (! unop_tp_s) {
2551                 unop_tp_s = new_type_method(2, 2);
2552                 set_method_param_type(unop_tp_s, 0, tp_u);
2553                 set_method_param_type(unop_tp_s, 1, tp_s);
2554                 set_method_res_type(unop_tp_s, 0, tp_u);
2555                 set_method_res_type(unop_tp_s, 1, tp_s);
2556         }  /* if */
2557
2558         lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), param->low_unsigned);
2559         lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), param->low_unsigned);
2560         lenv.waitq         = new_pdeq();
2561         lenv.params        = param;
2562         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
2563         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
2564
2565         /* first clear the generic function pointer for all ops */
2566         clear_irp_opcodes_generic_func();
2567
2568 #define LOWER2(op, fkt)   enter_lower_func(op_##op, fkt)
2569 #define LOWER(op)         LOWER2(op, lower_##op)
2570 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2571 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2572
2573         /* the table of all operations that must be lowered follows */
2574         LOWER(ASM);
2575         LOWER(Load);
2576         LOWER(Store);
2577         LOWER(Const);
2578         LOWER(And);
2579         LOWER(Or);
2580         LOWER(Eor);
2581         LOWER(Not);
2582         LOWER(Cond);
2583         LOWER(Return);
2584         LOWER(Call);
2585         LOWER(Unknown);
2586         LOWER(Phi);
2587         LOWER(Mux);
2588         LOWER(Start);
2589
2590         LOWER_BIN(Add);
2591         LOWER_BIN(Sub);
2592         LOWER_BIN(Mul);
2593         LOWER(Shl);
2594         LOWER(Shr);
2595         LOWER(Shrs);
2596         LOWER(Rotl);
2597         LOWER(DivMod);
2598         LOWER(Div);
2599         LOWER(Mod);
2600         LOWER(Sel);
2601         LOWER_UN(Abs);
2602         LOWER_UN(Minus);
2603
2604         LOWER(Conv);
2605
2606 #undef LOWER_UN
2607 #undef LOWER_BIN
2608 #undef LOWER
2609 #undef LOWER2
2610
2611         /* transform all graphs */
2612         rem = current_ir_graph;
2613         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2614                 ir_graph  *irg = get_irp_irg(i);
2615                 ir_entity *ent;
2616                 ir_type   *mtp;
2617                 int n_idx;
2618
2619                 obstack_init(&lenv.obst);
2620
2621                 n_idx = get_irg_last_idx(irg);
2622                 n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2623                 lenv.n_entries = n_idx;
2624                 lenv.entries   = NEW_ARR_F(node_entry_t *, n_idx);
2625                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2626
2627                 lenv.l_mtp        = NULL;
2628                 lenv.flags        = 0;
2629                 lenv.proj_2_block = pmap_create();
2630                 lenv.value_param_tp = NULL;
2631                 ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2632
2633                 ent = get_irg_entity(irg);
2634                 mtp = get_entity_type(ent);
2635
2636                 if (mtp_must_to_lowered(mtp, &lenv)) {
2637                         ir_type *ltp = lower_mtp(mtp, &lenv);
2638                         lenv.flags |= MUST_BE_LOWERED;
2639                         set_entity_type(ent, ltp);
2640                         lenv.l_mtp = ltp;
2641                         lenv.value_param_tp = get_method_value_param_type(mtp);
2642                 }  /* if */
2643
2644                 /* first step: link all nodes and allocate data */
2645                 irg_walk_graph(irg, firm_clear_node_and_phi_links, prepare_links_and_handle_rotl, &lenv);
2646
2647                 if (lenv.flags & MUST_BE_LOWERED) {
2648                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2649
2650                         /* must do some work */
2651                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2652
2653                         /* last step: all waiting nodes */
2654                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2655                         current_ir_graph = irg;
2656                         while (! pdeq_empty(lenv.waitq)) {
2657                                 ir_node *node = pdeq_getl(lenv.waitq);
2658
2659                                 lower_ops(node, &lenv);
2660                         }  /* while */
2661
2662                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2663
2664                         /* outs are invalid, we changed the graph */
2665                         set_irg_outs_inconsistent(irg);
2666
2667                         if (lenv.flags & CF_CHANGED) {
2668                                 /* control flow changed, dominance info is invalid */
2669                                 set_irg_doms_inconsistent(irg);
2670                                 set_irg_extblk_inconsistent(irg);
2671                                 set_irg_loopinfo_inconsistent(irg);
2672                         }  /* if */
2673                 } else {
2674                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2675                 }  /* if */
2676                 pmap_destroy(lenv.proj_2_block);
2677                 DEL_ARR_F(lenv.entries);
2678                 obstack_free(&lenv.obst, NULL);
2679         }  /* for */
2680         del_pdeq(lenv.waitq);
2681         current_ir_graph = rem;
2682 }  /* lower_dw_ops */
2683
2684 struct pass_t {
2685         ir_prog_pass_t      pass;
2686         const lwrdw_param_t *param;
2687 };
2688
2689 /**
2690  * Creates a wrapper around lower_dw_ops().
2691  */
2692 static int pass_wrapper(ir_prog *irp, void *context)
2693 {
2694         struct pass_t *pass = context;
2695
2696         (void)irp;
2697         lower_dw_ops(pass->param);
2698         return 0;
2699 }
2700
2701 ir_prog_pass_t *lower_dw_ops_pass(const char *name, const lwrdw_param_t *param) {
2702         struct pass_t *pass = XMALLOCZ(struct pass_t);
2703
2704         pass->param = param;
2705         return def_prog_pass_constructor(
2706                 &pass->pass, name ? name : "lower_dw", pass_wrapper);
2707 }  /* lower_dw_ops_pass */
2708
2709 /* Default implementation. */
2710 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2711                                     const ir_mode *imode, const ir_mode *omode,
2712                                     void *context)
2713 {
2714         char buf[64];
2715         ident *id;
2716         ir_entity *ent;
2717         (void) context;
2718
2719         if (imode == omode) {
2720                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2721         } else {
2722                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2723                         get_mode_name(imode), get_mode_name(omode));
2724         }  /* if */
2725         id = new_id_from_str(buf);
2726
2727         ent = new_entity(get_glob_type(), id, method);
2728         set_entity_ld_ident(ent, get_entity_ident(ent));
2729         set_entity_visibility(ent, visibility_external_allocated);
2730         return ent;
2731 }  /* def_create_intrinsic_fkt */