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
  56 /** A map from mode to a primitive type. */
  57 static pmap *prim_types;
  58
  59 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  60 static set *intrinsic_fkt;
  61
  62 /** A map from (imode, omode) to conv function types. */
  63 static set *conv_types;
  64
  65 /** A map from a method type to its lowered type. */
  66 static pmap *lowered_type;
  67
  68 /** The types for the binop and unop intrinsics. */
  69 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;
  70
  71 /** the debug handle */
  72 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  73
  74 /**
  75  * An entry in the (op, imode, omode) -> entity map.
  76  */
  77 typedef struct _op_mode_entry {
  78         const ir_op   *op;    /**< the op */
  79         const ir_mode *imode; /**< the input mode */
  80         const ir_mode *omode; /**< the output mode */
  81         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  82 } op_mode_entry_t;
  83
  84 /**
  85  * An entry in the (imode, omode) -> tp map.
  86  */
  87 typedef struct _conv_tp_entry {
  88         const ir_mode *imode; /**< the input mode */
  89         const ir_mode *omode; /**< the output mode */
  90         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
  91 } conv_tp_entry_t;
  92
  93 /**
  94  * Every double word node will be replaced,
  95  * we need some store to hold the replacement:
  96  */
  97 typedef struct _node_entry_t {
  98         ir_node *low_word;    /**< the low word */
  99         ir_node *high_word;   /**< the high word */
 100 } node_entry_t;
 101
 102 enum lower_flags {
 103         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 104         CF_CHANGED      = 2,  /**< control flow was changed */
 105 };
 106
 107 /**
 108  * The lower environment.
 109  */
 110 typedef struct _lower_env_t {
 111         node_entry_t **entries;       /**< entries per node */
 112         struct obstack obst;          /**< an obstack holding the temporary data */
 113         ir_type  *l_mtp;              /**< lowered method type of the current method */
 114         tarval   *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 115         tarval   *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 116         pdeq     *waitq;              /**< a wait queue of all nodes that must be handled later */
 117         pmap     *proj_2_block;       /**< a map from ProjX to its destination blocks */
 118         ident    *first_id;           /**< .l for little and .h for big endian */
 119         ident    *next_id;            /**< .h for little and .l for big endian */
 120         const lwrdw_param_t *params;  /**< transformation parameter */
 121         unsigned flags;               /**< some flags */
 122         int      n_entries;           /**< number of entries */
 123 #ifndef NDEBUG
 124         ir_type  *value_param_tp;     /**< the old value param type */
 125 #endif
 126 } lower_env_t;
 127
 128 /**
 129  * Get a primitive mode for a mode.
 130  */
 131 static ir_type *get_primitive_type(ir_mode *mode) {
 132         pmap_entry *entry = pmap_find(prim_types, mode);
 133         ir_type *tp;
 134         char buf[64];
 135
 136         if (entry)
 137                 return entry->value;
 138
 139         snprintf(buf, sizeof(buf), "_prim_%s", get_mode_name(mode));
 140         tp = new_type_primitive(new_id_from_str(buf), mode);
 141
 142         pmap_insert(prim_types, mode, tp);
 143         return tp;
 144 }  /* get_primitive_type */
 145
 146 /**
 147  * Create a method type for a Conv emulation from imode to omode.
 148  */
 149 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env) {
 150         conv_tp_entry_t key, *entry;
 151         ir_type *mtd;
 152
 153         key.imode = imode;
 154         key.omode = omode;
 155         key.mtd   = NULL;
 156
 157         entry = set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 158         if (! entry->mtd) {
 159                 int n_param = 1, n_res = 1;
 160                 char buf[64];
 161
 162                 if (imode == env->params->high_signed || imode == env->params->high_unsigned)
 163                         n_param = 2;
 164                 if (omode == env->params->high_signed || omode == env->params->high_unsigned)
 165                         n_res = 2;
 166
 167                 /* create a new one */
 168                 snprintf(buf, sizeof(buf), "LConv%s%s", get_mode_name(imode), get_mode_name(omode));
 169                 mtd = new_type_method(new_id_from_str(buf), n_param, n_res);
 170
 171                 /* set param types and result types */
 172                 n_param = 0;
 173                 if (imode == env->params->high_signed) {
 174                         set_method_param_type(mtd, n_param++, tp_u);
 175                         set_method_param_type(mtd, n_param++, tp_s);
 176                 } else if (imode == env->params->high_unsigned) {
 177                         set_method_param_type(mtd, n_param++, tp_u);
 178                         set_method_param_type(mtd, n_param++, tp_u);
 179                 } else {
 180                         ir_type *tp = get_primitive_type(imode);
 181                         set_method_param_type(mtd, n_param++, tp);
 182                 }  /* if */
 183
 184                 n_res = 0;
 185                 if (omode == env->params->high_signed) {
 186                         set_method_res_type(mtd, n_res++, tp_u);
 187                         set_method_res_type(mtd, n_res++, tp_s);
 188                 } else if (omode == env->params->high_unsigned) {
 189                         set_method_res_type(mtd, n_res++, tp_u);
 190                         set_method_res_type(mtd, n_res++, tp_u);
 191                 } else {
 192                         ir_type *tp = get_primitive_type(omode);
 193                         set_method_res_type(mtd, n_res++, tp);
 194                 }  /* if */
 195                 entry->mtd = mtd;
 196         } else {
 197                 mtd = entry->mtd;
 198         }  /* if */
 199         return mtd;
 200 }  /* get_conv_type */
 201
 202 /**
 203  * Add an additional control flow input to a block.
 204  * Patch all Phi nodes. The new Phi inputs are copied from
 205  * old input number nr.
 206  */
 207 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 208 {
 209         int i, arity = get_irn_arity(block);
 210         ir_node **in, *phi;
 211
 212         assert(nr < arity);
 213
 214         NEW_ARR_A(ir_node *, in, arity + 1);
 215         for (i = 0; i < arity; ++i)
 216                 in[i] = get_irn_n(block, i);
 217         in[i] = cf;
 218
 219         set_irn_in(block, i + 1, in);
 220
 221         for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
 222                 for (i = 0; i < arity; ++i)
 223                         in[i] = get_irn_n(phi, i);
 224                 in[i] = in[nr];
 225                 set_irn_in(phi, i + 1, in);
 226         }  /* for */
 227 }  /* add_block_cf_input_nr */
 228
 229 /**
 230  * Add an additional control flow input to a block.
 231  * Patch all Phi nodes. The new Phi inputs are copied from
 232  * old input from cf tmpl.
 233  */
 234 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 235 {
 236         int i, arity = get_irn_arity(block);
 237         int nr = 0;
 238
 239         for (i = 0; i < arity; ++i) {
 240                 if (get_irn_n(block, i) == tmpl) {
 241                         nr = i;
 242                         break;
 243                 }  /* if */
 244         }  /* for */
 245         assert(i < arity);
 246         add_block_cf_input_nr(block, nr, cf);
 247 }  /* add_block_cf_input */
 248
 249 /**
 250  * Return the "operational" mode of a Firm node.
 251  */
 252 static ir_mode *get_irn_op_mode(ir_node *node)
 253 {
 254         switch (get_irn_opcode(node)) {
 255         case iro_Load:
 256                 return get_Load_mode(node);
 257         case iro_Store:
 258                 return get_irn_mode(get_Store_value(node));
 259         case iro_DivMod:
 260                 return get_irn_mode(get_DivMod_left(node));
 261         case iro_Div:
 262                 return get_irn_mode(get_Div_left(node));
 263         case iro_Mod:
 264                 return get_irn_mode(get_Mod_left(node));
 265         case iro_Cmp:
 266                 return get_irn_mode(get_Cmp_left(node));
 267         default:
 268                 return get_irn_mode(node);
 269         }  /* switch */
 270 }  /* get_irn_op_mode */
 271
 272 /**
 273  * Walker, prepare the node links.
 274  */
 275 static void prepare_links(ir_node *node, void *env)
 276 {
 277         lower_env_t  *lenv = env;
 278         ir_mode      *mode = get_irn_op_mode(node);
 279         node_entry_t *link;
 280         int          i, idx;
 281
 282         if (mode == lenv->params->high_signed ||
 283                 mode == lenv->params->high_unsigned) {
 284                 /* ok, found a node that will be lowered */
 285                 link = obstack_alloc(&lenv->obst, sizeof(*link));
 286
 287                 memset(link, 0, sizeof(*link));
 288
 289                 idx = get_irn_idx(node);
 290                 if (idx >= lenv->n_entries) {
 291                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 292                         int old = lenv->n_entries;
 293                         int n_idx = idx + (idx >> 3);
 294
 295                         ARR_RESIZE(node_entry_t *, lenv->entries, n_idx);
 296                         memset(&lenv->entries[old], 0, (n_idx - old) * sizeof(lenv->entries[0]));
 297                         lenv->n_entries = n_idx;
 298                 }
 299                 lenv->entries[idx] = link;
 300                 lenv->flags |= MUST_BE_LOWERED;
 301         } else if (is_Conv(node)) {
 302                 /* Conv nodes have two modes */
 303                 ir_node *pred = get_Conv_op(node);
 304                 mode = get_irn_mode(pred);
 305
 306                 if (mode == lenv->params->high_signed ||
 307                         mode == lenv->params->high_unsigned) {
 308                         /* must lower this node either but don't need a link */
 309                         lenv->flags |= MUST_BE_LOWERED;
 310                 }  /* if */
 311                 return;
 312         }  /* if */
 313
 314         if (is_Proj(node)) {
 315                 /* link all Proj nodes to its predecessor:
 316                    Note that Tuple Proj's and its Projs are linked either. */
 317                 ir_node *pred = get_Proj_pred(node);
 318
 319                 set_irn_link(node, get_irn_link(pred));
 320                 set_irn_link(pred, node);
 321         } else if (is_Phi(node)) {
 322                 /* link all Phi nodes to its block */
 323                 ir_node *block = get_nodes_block(node);
 324                 add_Block_phi(block, node);
 325         } else if (is_Block(node)) {
 326                 /* fill the Proj -> Block map */
 327                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 328                         ir_node *pred = get_Block_cfgpred(node, i);
 329
 330                         if (is_Proj(pred))
 331                                 pmap_insert(lenv->proj_2_block, pred, node);
 332                 }  /* for */
 333         }  /* if */
 334 }  /* prepare_links */
 335
 336 /**
 337  * Translate a Constant: create two.
 338  */
 339 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env) {
 340         tarval   *tv, *tv_l, *tv_h;
 341         ir_node  *low, *high;
 342         dbg_info *dbg = get_irn_dbg_info(node);
 343         int      idx;
 344         ir_graph *irg = current_ir_graph;
 345         ir_mode  *low_mode = env->params->low_unsigned;
 346
 347         tv   = get_Const_tarval(node);
 348
 349         tv_l = tarval_convert_to(tv, low_mode);
 350         low  = new_rd_Const(dbg, irg, tv_l);
 351
 352         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 353         high = new_rd_Const(dbg, irg, tv_h);
 354
 355         idx = get_irn_idx(node);
 356         assert(idx < env->n_entries);
 357         env->entries[idx]->low_word  = low;
 358         env->entries[idx]->high_word = high;
 359 }  /* lower_Const */
 360
 361 /**
 362  * Translate a Load: create two.
 363  */
 364 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env) {
 365         ir_mode    *low_mode = env->params->low_unsigned;
 366         ir_graph   *irg = current_ir_graph;
 367         ir_node    *adr = get_Load_ptr(node);
 368         ir_node    *mem = get_Load_mem(node);
 369         ir_node    *low, *high, *proj;
 370         dbg_info   *dbg;
 371         ir_node    *block = get_nodes_block(node);
 372         int         idx;
 373         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 374                                  ? cons_volatile : 0;
 375
 376         if (env->params->little_endian) {
 377                 low  = adr;
 378                 high = new_r_Add(irg, block, adr,
 379                         new_r_Const(irg, env->tv_mode_bytes),
 380                         get_irn_mode(adr));
 381         } else {
 382                 low  = new_r_Add(irg, block, adr,
 383                         new_r_Const(irg, env->tv_mode_bytes),
 384                         get_irn_mode(adr));
 385                 high = adr;
 386         }  /* if */
 387
 388         /* create two loads */
 389         dbg  = get_irn_dbg_info(node);
 390         low  = new_rd_Load(dbg, irg, block, mem,  low,  low_mode, volatility);
 391         proj = new_r_Proj(irg, block, low, mode_M, pn_Load_M);
 392         high = new_rd_Load(dbg, irg, block, proj, high, mode, volatility);
 393
 394         idx = get_irn_idx(node);
 395         assert(idx < env->n_entries);
 396         env->entries[idx]->low_word  = low;
 397         env->entries[idx]->high_word = high;
 398
 399         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 400                 idx = get_irn_idx(proj);
 401
 402                 switch (get_Proj_proj(proj)) {
 403                 case pn_Load_M:         /* Memory result. */
 404                         /* put it to the second one */
 405                         set_Proj_pred(proj, high);
 406                         break;
 407                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 408                         /* put it to the first one */
 409                         set_Proj_pred(proj, low);
 410                         break;
 411                 case pn_Load_res:       /* Result of load operation. */
 412                         assert(idx < env->n_entries);
 413                         env->entries[idx]->low_word  = new_r_Proj(irg, block, low,  low_mode, pn_Load_res);
 414                         env->entries[idx]->high_word = new_r_Proj(irg, block, high, mode,     pn_Load_res);
 415                         break;
 416                 default:
 417                         assert(0 && "unexpected Proj number");
 418                 }  /* switch */
 419                 /* mark this proj: we have handled it already, otherwise we might fall into
 420                  * out new nodes. */
 421                 mark_irn_visited(proj);
 422         }  /* for */
 423 }  /* lower_Load */
 424
 425 /**
 426  * Translate a Store: create two.
 427  */
 428 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env) {
 429         ir_graph     *irg;
 430         ir_node      *block, *adr, *mem;
 431         ir_node      *low, *high, *irn, *proj;
 432         dbg_info     *dbg;
 433         int           idx;
 434         node_entry_t *entry;
 435         ir_cons_flags    volatility = get_Store_volatility(node) == volatility_is_volatile
 436                                    ? cons_volatile : 0;
 437         (void) mode;
 438
 439         irn = get_Store_value(node);
 440         entry = env->entries[get_irn_idx(irn)];
 441         assert(entry);
 442
 443         if (! entry->low_word) {
 444                 /* not ready yet, wait */
 445                 pdeq_putr(env->waitq, node);
 446                 return;
 447         }  /* if */
 448
 449         irg = current_ir_graph;
 450         adr = get_Store_ptr(node);
 451         mem = get_Store_mem(node);
 452         block = get_nodes_block(node);
 453
 454         if (env->params->little_endian) {
 455                 low  = adr;
 456                 high = new_r_Add(irg, block, adr,
 457                         new_r_Const(irg, env->tv_mode_bytes),
 458                         get_irn_mode(adr));
 459         } else {
 460                 low  = new_r_Add(irg, block, adr,
 461                         new_r_Const(irg, env->tv_mode_bytes),
 462                         get_irn_mode(adr));
 463                 high = adr;
 464         }  /* if */
 465
 466         /* create two Stores */
 467         dbg = get_irn_dbg_info(node);
 468         low  = new_rd_Store(dbg, irg, block, mem, low,  entry->low_word, volatility);
 469         proj = new_r_Proj(irg, block, low, mode_M, pn_Store_M);
 470         high = new_rd_Store(dbg, irg, block, proj, high, entry->high_word, volatility);
 471
 472         idx = get_irn_idx(node);
 473         assert(idx < env->n_entries);
 474         env->entries[idx]->low_word  = low;
 475         env->entries[idx]->high_word = high;
 476
 477         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 478                 idx = get_irn_idx(proj);
 479
 480                 switch (get_Proj_proj(proj)) {
 481                 case pn_Store_M:         /* Memory result. */
 482                         /* put it to the second one */
 483                         set_Proj_pred(proj, high);
 484                         break;
 485                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 486                         /* put it to the first one */
 487                         set_Proj_pred(proj, low);
 488                         break;
 489                 default:
 490                         assert(0 && "unexpected Proj number");
 491                 }  /* switch */
 492                 /* mark this proj: we have handled it already, otherwise we might fall into
 493                  * out new nodes. */
 494                 mark_irn_visited(proj);
 495         }  /* for */
 496 }  /* lower_Store */
 497
 498 /**
 499  * Return a node containing the address of the intrinsic emulation function.
 500  *
 501  * @param method  the method type of the emulation function
 502  * @param op      the emulated ir_op
 503  * @param imode   the input mode of the emulated opcode
 504  * @param omode   the output mode of the emulated opcode
 505  * @param block   where the new mode is created
 506  * @param env     the lower environment
 507  */
 508 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 509                                       ir_mode *imode, ir_mode *omode,
 510                                       ir_node *block, lower_env_t *env) {
 511         symconst_symbol sym;
 512         ir_entity *ent;
 513         op_mode_entry_t key, *entry;
 514
 515         key.op    = op;
 516         key.imode = imode;
 517         key.omode = omode;
 518         key.ent   = NULL;
 519
 520         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 521                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 522         if (! entry->ent) {
 523                 /* create a new one */
 524                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 525
 526                 assert(ent && "Intrinsic creator must return an entity");
 527                 entry->ent = ent;
 528         } else {
 529                 ent = entry->ent;
 530         }  /* if */
 531         sym.entity_p = ent;
 532         return new_r_SymConst(current_ir_graph, block, mode_P_code, sym, symconst_addr_ent);
 533 }  /* get_intrinsic_address */
 534
 535 /**
 536  * Translate a Div.
 537  *
 538  * Create an intrinsic Call.
 539  */
 540 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env) {
 541         ir_node  *block, *irn, *call, *proj;
 542         ir_node  *in[4];
 543         ir_mode  *opmode;
 544         dbg_info *dbg;
 545         ir_type  *mtp;
 546         int      idx;
 547         ir_graph *irg;
 548         node_entry_t *entry;
 549
 550         irn   = get_Div_left(node);
 551         entry = env->entries[get_irn_idx(irn)];
 552         assert(entry);
 553
 554         if (! entry->low_word) {
 555                 /* not ready yet, wait */
 556                 pdeq_putr(env->waitq, node);
 557                 return;
 558         }  /* if */
 559
 560         in[0] = entry->low_word;
 561         in[1] = entry->high_word;
 562
 563         irn   = get_Div_right(node);
 564         entry = env->entries[get_irn_idx(irn)];
 565         assert(entry);
 566
 567         if (! entry->low_word) {
 568                 /* not ready yet, wait */
 569                 pdeq_putr(env->waitq, node);
 570                 return;
 571         }  /* if */
 572
 573         in[2] = entry->low_word;
 574         in[3] = entry->high_word;
 575
 576         dbg   = get_irn_dbg_info(node);
 577         block = get_nodes_block(node);
 578         irg   = current_ir_graph;
 579
 580         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 581         opmode = get_irn_op_mode(node);
 582         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, block, env);
 583         call = new_rd_Call(dbg, irg, block, get_Div_mem(node),
 584                 irn, 4, in, mtp);
 585         set_irn_pinned(call, get_irn_pinned(node));
 586         irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 587
 588         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 589                 switch (get_Proj_proj(proj)) {
 590                 case pn_Div_M:         /* Memory result. */
 591                         /* reroute to the call */
 592                         set_Proj_pred(proj, call);
 593                         set_Proj_proj(proj, pn_Call_M_except);
 594                         break;
 595                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 596                         /* reroute to the call */
 597                         set_Proj_pred(proj, call);
 598                         set_Proj_proj(proj, pn_Call_X_except);
 599                         break;
 600                 case pn_Div_res:       /* Result of computation. */
 601                         idx = get_irn_idx(proj);
 602                         assert(idx < env->n_entries);
 603                         env->entries[idx]->low_word  = new_r_Proj(current_ir_graph, block, irn, env->params->low_unsigned, 0);
 604                         env->entries[idx]->high_word = new_r_Proj(current_ir_graph, block, irn, mode,                      1);
 605                         break;
 606                 default:
 607                         assert(0 && "unexpected Proj number");
 608                 }  /* switch */
 609                 /* mark this proj: we have handled it already, otherwise we might fall into
 610                  * out new nodes. */
 611                 mark_irn_visited(proj);
 612         }  /* for */
 613 }  /* lower_Div */
 614
 615 /**
 616  * Translate a Mod.
 617  *
 618  * Create an intrinsic Call.
 619  */
 620 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 621         ir_node  *block, *proj, *irn, *call;
 622         ir_node  *in[4];
 623         ir_mode  *opmode;
 624         dbg_info *dbg;
 625         ir_type  *mtp;
 626         int      idx;
 627         ir_graph *irg;
 628         node_entry_t *entry;
 629
 630         irn   = get_Mod_left(node);
 631         entry = env->entries[get_irn_idx(irn)];
 632         assert(entry);
 633
 634         if (! entry->low_word) {
 635                 /* not ready yet, wait */
 636                 pdeq_putr(env->waitq, node);
 637                 return;
 638         }  /* if */
 639
 640         in[0] = entry->low_word;
 641         in[1] = entry->high_word;
 642
 643         irn   = get_Mod_right(node);
 644         entry = env->entries[get_irn_idx(irn)];
 645         assert(entry);
 646
 647         if (! entry->low_word) {
 648                 /* not ready yet, wait */
 649                 pdeq_putr(env->waitq, node);
 650                 return;
 651         }  /* if */
 652
 653         in[2] = entry->low_word;
 654         in[3] = entry->high_word;
 655
 656         dbg   = get_irn_dbg_info(node);
 657         block = get_nodes_block(node);
 658         irg   = current_ir_graph;
 659
 660         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 661         opmode = get_irn_op_mode(node);
 662         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, block, env);
 663         call = new_rd_Call(dbg, irg, block, get_Mod_mem(node),
 664                 irn, 4, in, mtp);
 665         set_irn_pinned(call, get_irn_pinned(node));
 666         irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 667
 668         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 669                 switch (get_Proj_proj(proj)) {
 670                 case pn_Mod_M:         /* Memory result. */
 671                         /* reroute to the call */
 672                         set_Proj_pred(proj, call);
 673                         set_Proj_proj(proj, pn_Call_M_except);
 674                         break;
 675                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 676                         /* reroute to the call */
 677                         set_Proj_pred(proj, call);
 678                         set_Proj_proj(proj, pn_Call_X_except);
 679                         break;
 680                 case pn_Mod_res:       /* Result of computation. */
 681                         idx = get_irn_idx(proj);
 682                         assert(idx < env->n_entries);
 683                         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
 684                         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
 685                         break;
 686                 default:
 687                         assert(0 && "unexpected Proj number");
 688                 }  /* switch */
 689                 /* mark this proj: we have handled it already, otherwise we might fall into
 690                  * out new nodes. */
 691                 mark_irn_visited(proj);
 692         }  /* for */
 693 }  /* lower_Mod */
 694
 695 /**
 696  * Translate a DivMod.
 697  *
 698  * Create two intrinsic Calls.
 699  */
 700 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 701         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod;
 702         ir_node  *resDiv = NULL;
 703         ir_node  *resMod = NULL;
 704         ir_node  *in[4];
 705         ir_mode  *opmode;
 706         dbg_info *dbg;
 707         ir_type  *mtp;
 708         int      idx;
 709         node_entry_t *entry;
 710         unsigned flags = 0;
 711         ir_graph *irg;
 712
 713         /* check if both results are needed */
 714         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 715                 switch (get_Proj_proj(proj)) {
 716                 case pn_DivMod_res_div: flags |= 1; break;
 717                 case pn_DivMod_res_mod: flags |= 2; break;
 718                 default: break;
 719                 }  /* switch */
 720         }  /* for */
 721
 722         irn   = get_DivMod_left(node);
 723         entry = env->entries[get_irn_idx(irn)];
 724         assert(entry);
 725
 726         if (! entry->low_word) {
 727                 /* not ready yet, wait */
 728                 pdeq_putr(env->waitq, node);
 729                 return;
 730         }  /* if */
 731
 732         in[0] = entry->low_word;
 733         in[1] = entry->high_word;
 734
 735         irn   = get_DivMod_right(node);
 736         entry = env->entries[get_irn_idx(irn)];
 737         assert(entry);
 738
 739         if (! entry->low_word) {
 740                 /* not ready yet, wait */
 741                 pdeq_putr(env->waitq, node);
 742                 return;
 743         }  /* if */
 744
 745         in[2] = entry->low_word;
 746         in[3] = entry->high_word;
 747
 748         dbg   = get_irn_dbg_info(node);
 749         block = get_nodes_block(node);
 750         irg   = current_ir_graph;
 751
 752         mem = get_DivMod_mem(node);
 753
 754         callDiv = callMod = NULL;
 755         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 756         if (flags & 1) {
 757                 opmode = get_irn_op_mode(node);
 758                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, block, env);
 759                 callDiv = new_rd_Call(dbg, irg, block, mem,
 760                         irn, 4, in, mtp);
 761                 set_irn_pinned(callDiv, get_irn_pinned(node));
 762                 resDiv = new_r_Proj(irg, block, callDiv, mode_T, pn_Call_T_result);
 763         }  /* if */
 764         if (flags & 2) {
 765                 if (flags & 1)
 766                         mem = new_r_Proj(irg, block, callDiv, mode_M, pn_Call_M);
 767                 opmode = get_irn_op_mode(node);
 768                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, block, env);
 769                 callMod = new_rd_Call(dbg, irg, block, mem,
 770                         irn, 4, in, mtp);
 771                 set_irn_pinned(callMod, get_irn_pinned(node));
 772                 resMod = new_r_Proj(irg, block, callMod, mode_T, pn_Call_T_result);
 773         }  /* if */
 774
 775         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 776                 switch (get_Proj_proj(proj)) {
 777                 case pn_DivMod_M:         /* Memory result. */
 778                         /* reroute to the first call */
 779                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 780                         set_Proj_proj(proj, pn_Call_M_except);
 781                         break;
 782                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 783                         /* reroute to the first call */
 784                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 785                         set_Proj_proj(proj, pn_Call_X_except);
 786                         break;
 787                 case pn_DivMod_res_div:   /* Result of Div. */
 788                         idx = get_irn_idx(proj);
 789                         assert(idx < env->n_entries);
 790                         env->entries[idx]->low_word  = new_r_Proj(irg, block, resDiv, env->params->low_unsigned, 0);
 791                         env->entries[idx]->high_word = new_r_Proj(irg, block, resDiv, mode,                      1);
 792                         break;
 793                 case pn_DivMod_res_mod:   /* Result of Mod. */
 794                         idx = get_irn_idx(proj);
 795                         env->entries[idx]->low_word  = new_r_Proj(irg, block, resMod, env->params->low_unsigned, 0);
 796                         env->entries[idx]->high_word = new_r_Proj(irg, block, resMod, mode,                      1);
 797                         break;
 798                 default:
 799                         assert(0 && "unexpected Proj number");
 800                 }  /* switch */
 801                 /* mark this proj: we have handled it already, otherwise we might fall into
 802                  * out new nodes. */
 803                 mark_irn_visited(proj);
 804         }  /* for */
 805 }  /* lower_DivMod */
 806
 807 /**
 808  * Translate a Binop.
 809  *
 810  * Create an intrinsic Call.
 811  */
 812 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 813         ir_node  *block, *irn;
 814         ir_node  *in[4];
 815         dbg_info *dbg;
 816         ir_type  *mtp;
 817         int      idx;
 818         ir_graph *irg;
 819         node_entry_t *entry;
 820
 821         irn   = get_binop_left(node);
 822         entry = env->entries[get_irn_idx(irn)];
 823         assert(entry);
 824
 825         if (! entry->low_word) {
 826                 /* not ready yet, wait */
 827                 pdeq_putr(env->waitq, node);
 828                 return;
 829         }  /* if */
 830
 831         in[0] = entry->low_word;
 832         in[1] = entry->high_word;
 833
 834         irn   = get_binop_right(node);
 835         entry = env->entries[get_irn_idx(irn)];
 836         assert(entry);
 837
 838         if (! entry->low_word) {
 839                 /* not ready yet, wait */
 840                 pdeq_putr(env->waitq, node);
 841                 return;
 842         }  /* if */
 843
 844         in[2] = entry->low_word;
 845         in[3] = entry->high_word;
 846
 847         dbg   = get_irn_dbg_info(node);
 848         block = get_nodes_block(node);
 849         irg   = current_ir_graph;
 850
 851         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 852         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
 853         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
 854                 irn, 4, in, mtp);
 855         set_irn_pinned(irn, get_irn_pinned(node));
 856         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
 857
 858         idx = get_irn_idx(node);
 859         assert(idx < env->n_entries);
 860         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
 861         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
 862 }  /* lower_Binop */
 863
 864 /**
 865  * Translate a Shiftop.
 866  *
 867  * Create an intrinsic Call.
 868  */
 869 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 870         ir_node  *block, *irn;
 871         ir_node  *in[3];
 872         dbg_info *dbg;
 873         ir_type  *mtp;
 874         int      idx;
 875         ir_graph *irg;
 876         node_entry_t *entry;
 877
 878         irn   = get_binop_left(node);
 879         entry = env->entries[get_irn_idx(irn)];
 880         assert(entry);
 881
 882         if (! entry->low_word) {
 883                 /* not ready yet, wait */
 884                 pdeq_putr(env->waitq, node);
 885                 return;
 886         }  /* if */
 887
 888         in[0] = entry->low_word;
 889         in[1] = entry->high_word;
 890
 891         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 892         in[2] = get_binop_right(node);
 893
 894         dbg   = get_irn_dbg_info(node);
 895         block = get_nodes_block(node);
 896         irg  = current_ir_graph;
 897
 898         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 899         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
 900         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
 901                 irn, 3, in, mtp);
 902         set_irn_pinned(irn, get_irn_pinned(node));
 903         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
 904
 905         idx = get_irn_idx(node);
 906         assert(idx < env->n_entries);
 907         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
 908         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
 909 }  /* lower_Shiftop */
 910
 911 /**
 912  * Translate a Shr and handle special cases.
 913  */
 914 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env) {
 915         ir_node  *right = get_Shr_right(node);
 916         ir_graph *irg = current_ir_graph;
 917
 918         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 919                 tarval *tv = get_Const_tarval(right);
 920
 921                 if (tarval_is_long(tv) &&
 922                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 923                         ir_node *block = get_nodes_block(node);
 924                         ir_node *left = get_Shr_left(node);
 925                         ir_node *c;
 926                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 927                         int idx = get_irn_idx(left);
 928
 929                         left = env->entries[idx]->high_word;
 930                         idx = get_irn_idx(node);
 931
 932                         if (shf_cnt > 0) {
 933                                 c = new_r_Const_long(irg, env->params->low_unsigned, shf_cnt);
 934                                 env->entries[idx]->low_word = new_r_Shr(irg, block, left, c, mode);
 935                         } else {
 936                                 env->entries[idx]->low_word = left;
 937                         }  /* if */
 938                         env->entries[idx]->high_word = new_r_Const(irg, get_mode_null(mode));
 939
 940                         return;
 941                 }  /* if */
 942         }  /* if */
 943         lower_Shiftop(node, mode, env);
 944 }  /* lower_Shr */
 945
 946 /**
 947  * Translate a Shl and handle special cases.
 948  */
 949 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env) {
 950         ir_node  *right = get_Shl_right(node);
 951         ir_graph *irg = current_ir_graph;
 952
 953         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 954                 tarval *tv = get_Const_tarval(right);
 955
 956                 if (tarval_is_long(tv) &&
 957                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 958                         ir_mode *mode_l;
 959                         ir_node *block = get_nodes_block(node);
 960                         ir_node *left = get_Shl_left(node);
 961                         ir_node *c;
 962                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 963                         int idx = get_irn_idx(left);
 964
 965                         left = new_r_Conv(irg, block, env->entries[idx]->low_word, mode);
 966                         idx = get_irn_idx(node);
 967
 968                         mode_l = env->params->low_unsigned;
 969                         if (shf_cnt > 0) {
 970                                 c = new_r_Const_long(irg, mode_l, shf_cnt);
 971                                 env->entries[idx]->high_word = new_r_Shl(irg, block, left, c, mode);
 972                         } else {
 973                                 env->entries[idx]->high_word = left;
 974                         }  /* if */
 975                         env->entries[idx]->low_word  = new_r_Const(irg, get_mode_null(mode_l));
 976
 977                         return;
 978                 }  /* if */
 979         }  /* if */
 980         lower_Shiftop(node, mode, env);
 981 }  /* lower_Shl */
 982
 983 /**
 984  * Translate a Shrs and handle special cases.
 985  */
 986 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env) {
 987         ir_node  *right = get_Shrs_right(node);
 988         ir_graph *irg = current_ir_graph;
 989
 990         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 991                 tarval *tv = get_Const_tarval(right);
 992
 993                 if (tarval_is_long(tv) &&
 994                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 995                         ir_node *block   = get_nodes_block(node);
 996                         ir_node *left    = get_Shrs_left(node);
 997                         long     shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 998                         int      idx     = get_irn_idx(left);
 999                         ir_mode *mode_l;
1000                         ir_node *low;
1001                         ir_node *c;
1002
1003                         left = env->entries[idx]->high_word;
1004                         idx = get_irn_idx(node);
1005
1006                         mode_l = env->params->low_unsigned;
1007                         if (shf_cnt > 0) {
1008                                 c   = new_r_Const_long(irg, mode_l, shf_cnt);
1009                                 low = new_r_Shrs(irg, block, left, c, mode);
1010                         } else {
1011                                 low = left;
1012                         }  /* if */
1013                         /* low word is expected to have mode_l */
1014                         env->entries[idx]->low_word = new_r_Conv(irg, block, low, mode_l);
1015
1016                         c = new_r_Const_long(irg, mode_l, get_mode_size_bits(mode) - 1);
1017                         env->entries[idx]->high_word = new_r_Shrs(irg, block, left, c, mode);
1018
1019                         return;
1020                 }  /* if */
1021         }  /* if */
1022         lower_Shiftop(node, mode, env);
1023 }  /* lower_Shrs */
1024
1025 /**
1026  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1027  */
1028 static void prepare_links_and_handle_rotl(ir_node *node, void *env) {
1029         lower_env_t *lenv = env;
1030
1031         if (is_Rotl(node)) {
1032                 ir_mode *mode = get_irn_op_mode(node);
1033                         if (mode == lenv->params->high_signed ||
1034                             mode == lenv->params->high_unsigned) {
1035                                 ir_node  *right = get_Rotl_right(node);
1036                                 ir_node  *left, *shl, *shr, *or, *block, *sub, *c;
1037                                 ir_mode  *omode, *rmode;
1038                                 ir_graph *irg;
1039                                 dbg_info *dbg;
1040                                 optimization_state_t state;
1041
1042                                 if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1043                                         tarval *tv = get_Const_tarval(right);
1044
1045                                         if (tarval_is_long(tv) &&
1046                                             get_tarval_long(tv) == (long)get_mode_size_bits(mode)) {
1047                                                 /* will be optimized in lower_Rotl() */
1048                                                 return;
1049                                         }
1050                                 }
1051
1052                                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) and lower those */
1053                                 dbg   = get_irn_dbg_info(node);
1054                                 omode = get_irn_mode(node);
1055                                 left  = get_Rotl_left(node);
1056                                 irg   = current_ir_graph;
1057                                 block = get_nodes_block(node);
1058                                 shl   = new_rd_Shl(dbg, irg, block, left, right, omode);
1059                                 rmode = get_irn_mode(right);
1060                                 c     = new_Const_long(rmode, get_mode_size_bits(omode));
1061                                 sub   = new_rd_Sub(dbg, irg, block, c, right, rmode);
1062                                 shr   = new_rd_Shr(dbg, irg, block, left, sub, omode);
1063
1064                                 /* optimization must be switched off here, or we will get the Rotl back */
1065                                 save_optimization_state(&state);
1066                                 set_opt_algebraic_simplification(0);
1067                                 or = new_rd_Or(dbg, irg, block, shl, shr, omode);
1068                                 restore_optimization_state(&state);
1069
1070                                 exchange(node, or);
1071
1072                                 /* do lowering on the new nodes */
1073                                 prepare_links(shl, env);
1074                                 prepare_links(c, env);
1075                                 prepare_links(sub, env);
1076                                 prepare_links(shr, env);
1077                                 prepare_links(or, env);
1078                         }
1079         } else {
1080                 prepare_links(node, env);
1081         }
1082 }
1083
1084 /**
1085  * Translate a special case Rotl(x, sizeof(w)).
1086  */
1087 static void lower_Rotl(ir_node *node, ir_mode *mode, lower_env_t *env) {
1088         ir_node *right = get_Rotl_right(node);
1089         ir_node *left = get_Rotl_left(node);
1090         ir_node *h, *l;
1091         int idx = get_irn_idx(left);
1092         (void) right;
1093         (void) mode;
1094
1095         assert(get_mode_arithmetic(mode) == irma_twos_complement &&
1096                is_Const(right) && tarval_is_long(get_Const_tarval(right)) &&
1097                get_tarval_long(get_Const_tarval(right)) == (long)get_mode_size_bits(mode));
1098
1099         l = env->entries[idx]->low_word;
1100         h = env->entries[idx]->high_word;
1101         idx = get_irn_idx(node);
1102
1103         env->entries[idx]->low_word  = h;
1104         env->entries[idx]->high_word = l;
1105 }  /* lower_Rotl */
1106
1107 /**
1108  * Translate an Unop.
1109  *
1110  * Create an intrinsic Call.
1111  */
1112 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env) {
1113         ir_node  *block, *irn;
1114         ir_node  *in[2];
1115         dbg_info *dbg;
1116         ir_type  *mtp;
1117         int      idx;
1118         ir_graph *irg;
1119         node_entry_t *entry;
1120
1121         irn   = get_unop_op(node);
1122         entry = env->entries[get_irn_idx(irn)];
1123         assert(entry);
1124
1125         if (! entry->low_word) {
1126                 /* not ready yet, wait */
1127                 pdeq_putr(env->waitq, node);
1128                 return;
1129         }  /* if */
1130
1131         in[0] = entry->low_word;
1132         in[1] = entry->high_word;
1133
1134         dbg   = get_irn_dbg_info(node);
1135         block = get_nodes_block(node);
1136         irg   = current_ir_graph;
1137
1138         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1139         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
1140         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
1141                 irn, 2, in, mtp);
1142         set_irn_pinned(irn, get_irn_pinned(node));
1143         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
1144
1145         idx = get_irn_idx(node);
1146         assert(idx < env->n_entries);
1147         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
1148         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
1149 }  /* lower_Unop */
1150
1151 /**
1152  * Translate a logical Binop.
1153  *
1154  * Create two logical Binops.
1155  */
1156 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1157                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_graph *irg, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1158         ir_node  *block, *irn;
1159         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1160         dbg_info *dbg;
1161         int      idx;
1162         ir_graph *irg;
1163         node_entry_t *entry;
1164
1165         irn   = get_binop_left(node);
1166         entry = env->entries[get_irn_idx(irn)];
1167         assert(entry);
1168
1169         if (! entry->low_word) {
1170                 /* not ready yet, wait */
1171                 pdeq_putr(env->waitq, node);
1172                 return;
1173         }  /* if */
1174
1175         lop_l = entry->low_word;
1176         lop_h = entry->high_word;
1177
1178         irn   = get_binop_right(node);
1179         entry = env->entries[get_irn_idx(irn)];
1180         assert(entry);
1181
1182         if (! entry->low_word) {
1183                 /* not ready yet, wait */
1184                 pdeq_putr(env->waitq, node);
1185                 return;
1186         }  /* if */
1187
1188         rop_l = entry->low_word;
1189         rop_h = entry->high_word;
1190
1191         dbg = get_irn_dbg_info(node);
1192         block = get_nodes_block(node);
1193
1194         idx = get_irn_idx(node);
1195         assert(idx < env->n_entries);
1196         irg = current_ir_graph;
1197         env->entries[idx]->low_word  = constr_rd(dbg, irg, block, lop_l, rop_l, env->params->low_unsigned);
1198         env->entries[idx]->high_word = constr_rd(dbg, irg, block, lop_h, rop_h, mode);
1199 }  /* lower_Binop_logical */
1200
1201 /** create a logical operation transformation */
1202 #define lower_logical(op)                                                \
1203 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1204         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1205 }
1206
1207 lower_logical(And)
1208 lower_logical(Or)
1209 lower_logical(Eor)
1210
1211 /**
1212  * Translate a Not.
1213  *
1214  * Create two logical Nots.
1215  */
1216 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env) {
1217         ir_node  *block, *irn;
1218         ir_node  *op_l, *op_h;
1219         dbg_info *dbg;
1220         int      idx;
1221         ir_graph *irg;
1222         node_entry_t *entry;
1223
1224         irn   = get_Not_op(node);
1225         entry = env->entries[get_irn_idx(irn)];
1226         assert(entry);
1227
1228         if (! entry->low_word) {
1229                 /* not ready yet, wait */
1230                 pdeq_putr(env->waitq, node);
1231                 return;
1232         }  /* if */
1233
1234         op_l = entry->low_word;
1235         op_h = entry->high_word;
1236
1237         dbg   = get_irn_dbg_info(node);
1238         block = get_nodes_block(node);
1239         irg   = current_ir_graph;
1240
1241         idx = get_irn_idx(node);
1242         assert(idx < env->n_entries);
1243         env->entries[idx]->low_word  = new_rd_Not(dbg, current_ir_graph, block, op_l, env->params->low_unsigned);
1244         env->entries[idx]->high_word = new_rd_Not(dbg, current_ir_graph, block, op_h, mode);
1245 }  /* lower_Not */
1246
1247 /**
1248  * Translate a Cond.
1249  */
1250 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
1251         ir_node *cmp, *left, *right, *block;
1252         ir_node *sel = get_Cond_selector(node);
1253         ir_mode *m = get_irn_mode(sel);
1254         int     idx;
1255         (void) mode;
1256
1257         if (m == mode_b) {
1258                 node_entry_t *lentry, *rentry;
1259                 ir_node  *proj, *projT = NULL, *projF = NULL;
1260                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1261                 ir_node  *projHF, *projHT;
1262                 ir_node  *dst_blk;
1263                 ir_graph *irg;
1264                 pn_Cmp   pnc;
1265                 dbg_info *dbg;
1266
1267                 if(!is_Proj(sel))
1268                         return;
1269
1270                 cmp   = get_Proj_pred(sel);
1271                 if(!is_Cmp(cmp))
1272                         return;
1273
1274                 left  = get_Cmp_left(cmp);
1275                 idx   = get_irn_idx(left);
1276                 lentry = env->entries[idx];
1277
1278                 if (! lentry) {
1279                         /* a normal Cmp */
1280                         return;
1281                 }  /* if */
1282
1283                 right = get_Cmp_right(cmp);
1284                 idx   = get_irn_idx(right);
1285                 rentry = env->entries[idx];
1286                 assert(rentry);
1287
1288                 if (! lentry->low_word || !rentry->low_word) {
1289                         /* not yet ready */
1290                         pdeq_putr(env->waitq, node);
1291                         return;
1292                 }  /* if */
1293
1294                 /* all right, build the code */
1295                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1296                         long proj_nr = get_Proj_proj(proj);
1297
1298                         if (proj_nr == pn_Cond_true) {
1299                                 assert(projT == NULL && "more than one Proj(true)");
1300                                 projT = proj;
1301                         } else {
1302                                 assert(proj_nr == pn_Cond_false);
1303                                 assert(projF == NULL && "more than one Proj(false)");
1304                                 projF = proj;
1305                         }  /* if */
1306                         mark_irn_visited(proj);
1307                 }  /* for */
1308                 assert(projT && projF);
1309
1310                 /* create a new high compare */
1311                 block = get_nodes_block(node);
1312                 dbg   = get_irn_dbg_info(cmp);
1313                 irg   = current_ir_graph;
1314                 pnc   = get_Proj_proj(sel);
1315
1316                 if (is_Const(right) && is_Const_null(right)) {
1317                         if (pnc == pn_Cmp_Eq || pnc == pn_Cmp_Lg) {
1318                                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1319                                 ir_mode *mode = env->params->low_unsigned;
1320                                 ir_node *low  = new_r_Conv(irg, block, lentry->low_word, mode);
1321                                 ir_node *high = new_r_Conv(irg, block, lentry->high_word, mode);
1322                                 ir_node *or   = new_rd_Or(dbg, irg, block, low, high, mode);
1323                                 ir_node *cmp  = new_rd_Cmp(dbg, irg, block, or, new_Const_long(mode, 0));
1324
1325                                 ir_node *proj = new_r_Proj(irg, block, cmp, mode_b, pnc);
1326                                 set_Cond_selector(node, proj);
1327                                 return;
1328                         }
1329                 }
1330
1331                 cmpH = new_rd_Cmp(dbg, irg, block, lentry->high_word, rentry->high_word);
1332
1333                 if (pnc == pn_Cmp_Eq) {
1334                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1335                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1336
1337                         assert(entry);
1338                         dst_blk = entry->value;
1339
1340                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Eq);
1341                         dbg = get_irn_dbg_info(node);
1342                         irn = new_rd_Cond(dbg, irg, block, irn);
1343
1344                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1345                         mark_irn_visited(projHF);
1346                         exchange(projF, projHF);
1347
1348                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1349                         mark_irn_visited(projHT);
1350
1351                         new_bl = new_r_Block(irg, 1, &projHT);
1352
1353                         dbg   = get_irn_dbg_info(cmp);
1354                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1355                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Eq);
1356                         dbg = get_irn_dbg_info(node);
1357                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1358
1359                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1360                         mark_irn_visited(proj);
1361                         add_block_cf_input(dst_blk, projHF, proj);
1362
1363                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1364                         mark_irn_visited(proj);
1365                         exchange(projT, proj);
1366                 } else if (pnc == pn_Cmp_Lg) {
1367                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1368                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1369
1370                         assert(entry);
1371                         dst_blk = entry->value;
1372
1373                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Lg);
1374                         dbg = get_irn_dbg_info(node);
1375                         irn = new_rd_Cond(dbg, irg, block, irn);
1376
1377                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1378                         mark_irn_visited(projHT);
1379                         exchange(projT, projHT);
1380
1381                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1382                         mark_irn_visited(projHF);
1383
1384                         new_bl = new_r_Block(irg, 1, &projHF);
1385
1386                         dbg   = get_irn_dbg_info(cmp);
1387                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1388                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Lg);
1389                         dbg = get_irn_dbg_info(node);
1390                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1391
1392                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1393                         mark_irn_visited(proj);
1394                         add_block_cf_input(dst_blk, projHT, proj);
1395
1396                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1397                         mark_irn_visited(proj);
1398                         exchange(projF, proj);
1399                 } else {
1400                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1401                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1402                         pmap_entry *entry;
1403
1404                         entry = pmap_find(env->proj_2_block, projT);
1405                         assert(entry);
1406                         dstT = entry->value;
1407
1408                         entry = pmap_find(env->proj_2_block, projF);
1409                         assert(entry);
1410                         dstF = entry->value;
1411
1412                         irn = new_r_Proj(irg, block, cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1413                         dbg = get_irn_dbg_info(node);
1414                         irn = new_rd_Cond(dbg, irg, block, irn);
1415
1416                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1417                         mark_irn_visited(projHT);
1418                         exchange(projT, projHT);
1419                         projT = projHT;
1420
1421                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1422                         mark_irn_visited(projHF);
1423
1424                         newbl_eq = new_r_Block(irg, 1, &projHF);
1425
1426                         irn = new_r_Proj(irg, newbl_eq, cmpH, mode_b, pn_Cmp_Eq);
1427                         irn = new_rd_Cond(dbg, irg, newbl_eq, irn);
1428
1429                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_false);
1430                         mark_irn_visited(proj);
1431                         exchange(projF, proj);
1432                         projF = proj;
1433
1434                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_true);
1435                         mark_irn_visited(proj);
1436
1437                         newbl_l = new_r_Block(irg, 1, &proj);
1438
1439                         dbg   = get_irn_dbg_info(cmp);
1440                         cmpL = new_rd_Cmp(dbg, irg, newbl_l, lentry->low_word, rentry->low_word);
1441                         irn = new_r_Proj(irg, newbl_l, cmpL, mode_b, pnc);
1442                         dbg = get_irn_dbg_info(node);
1443                         irn = new_rd_Cond(dbg, irg, newbl_l, irn);
1444
1445                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_true);
1446                         mark_irn_visited(proj);
1447                         add_block_cf_input(dstT, projT, proj);
1448
1449                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_false);
1450                         mark_irn_visited(proj);
1451                         add_block_cf_input(dstF, projF, proj);
1452                 }  /* if */
1453
1454                 /* we have changed the control flow */
1455                 env->flags |= CF_CHANGED;
1456         } else {
1457                 idx = get_irn_idx(sel);
1458
1459                 if (env->entries[idx]) {
1460                         /*
1461                            Bad, a jump-table with double-word index.
1462                            This should not happen, but if it does we handle
1463                            it like a Conv were between (in other words, ignore
1464                            the high part.
1465                          */
1466
1467                         if (! env->entries[idx]->low_word) {
1468                                 /* not ready yet, wait */
1469                                 pdeq_putr(env->waitq, node);
1470                                 return;
1471                         }  /* if */
1472                         set_Cond_selector(node, env->entries[idx]->low_word);
1473                 }  /* if */
1474         }  /* if */
1475 }  /* lower_Cond */
1476
1477 /**
1478  * Translate a Conv to higher_signed
1479  */
1480 static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
1481         ir_node  *op    = get_Conv_op(node);
1482         ir_mode  *imode = get_irn_mode(op);
1483         ir_mode  *dst_mode_l = env->params->low_unsigned;
1484         ir_mode  *dst_mode_h = env->params->low_signed;
1485         int      idx = get_irn_idx(node);
1486         ir_graph *irg = current_ir_graph;
1487         ir_node  *block = get_nodes_block(node);
1488         dbg_info *dbg = get_irn_dbg_info(node);
1489
1490         assert(idx < env->n_entries);
1491
1492         if (mode_is_int(imode) || mode_is_reference(imode)) {
1493                 if (imode == env->params->high_unsigned) {
1494                         /* a Conv from Lu to Ls */
1495                         int op_idx = get_irn_idx(op);
1496
1497                         if (! env->entries[op_idx]->low_word) {
1498                                 /* not ready yet, wait */
1499                                 pdeq_putr(env->waitq, node);
1500                                 return;
1501                         }  /* if */
1502                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word,  dst_mode_l);
1503                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode_h);
1504                 } else {
1505                         /* simple case: create a high word */
1506                         if (imode != dst_mode_l)
1507                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode_l);
1508
1509                         env->entries[idx]->low_word  = op;
1510
1511                         if (mode_is_signed(imode)) {
1512                                 ir_node *op_conv = new_rd_Conv(dbg, irg, block, op, dst_mode_h);
1513                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op_conv,
1514                                         new_Const_long(dst_mode_l, get_mode_size_bits(dst_mode_h) - 1), dst_mode_h);
1515                         } else {
1516                                 env->entries[idx]->high_word = new_Const(get_mode_null(dst_mode_h));
1517                         }  /* if */
1518                 }  /* if */
1519         } else {
1520                 ir_node *irn, *call;
1521                 ir_mode *omode = env->params->high_signed;
1522                 ir_type *mtp = get_conv_type(imode, omode, env);
1523
1524                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1525                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1526                 set_irn_pinned(call, get_irn_pinned(node));
1527                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1528
1529                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode_l, 0);
1530                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode_h, 1);
1531         }  /* if */
1532 }  /* lower_Conv_to_Ls */
1533
1534 /**
1535  * Translate a Conv to higher_unsigned
1536  */
1537 static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
1538         ir_node  *op    = get_Conv_op(node);
1539         ir_mode  *imode = get_irn_mode(op);
1540         ir_mode  *dst_mode = env->params->low_unsigned;
1541         int      idx = get_irn_idx(node);
1542         ir_graph *irg = current_ir_graph;
1543         ir_node  *block = get_nodes_block(node);
1544         dbg_info *dbg = get_irn_dbg_info(node);
1545
1546         assert(idx < env->n_entries);
1547
1548         if (mode_is_int(imode) || mode_is_reference(imode)) {
1549                 if (imode == env->params->high_signed) {
1550                         /* a Conv from Ls to Lu */
1551                         int op_idx = get_irn_idx(op);
1552
1553                         if (! env->entries[op_idx]->low_word) {
1554                                 /* not ready yet, wait */
1555                                 pdeq_putr(env->waitq, node);
1556                                 return;
1557                         }  /* if */
1558                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word, dst_mode);
1559                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode);
1560                 } else {
1561                         /* simple case: create a high word */
1562                         if (imode != dst_mode)
1563                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode);
1564
1565                         env->entries[idx]->low_word  = op;
1566
1567                         if (mode_is_signed(imode)) {
1568                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op,
1569                                         new_Const_long(dst_mode, get_mode_size_bits(dst_mode) - 1), dst_mode);
1570                         } else {
1571                                 env->entries[idx]->high_word = new_Const(get_mode_null(dst_mode));
1572                         }  /* if */
1573                 }  /* if */
1574         } else {
1575                 ir_node *irn, *call;
1576                 ir_mode *omode = env->params->high_unsigned;
1577                 ir_type *mtp = get_conv_type(imode, omode, env);
1578
1579                 /* do an intrinsic call */
1580                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1581                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1582                 set_irn_pinned(call, get_irn_pinned(node));
1583                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1584
1585                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode, 0);
1586                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode, 1);
1587         }  /* if */
1588 }  /* lower_Conv_to_Lu */
1589
1590 /**
1591  * Translate a Conv from higher_signed
1592  */
1593 static void lower_Conv_from_Ls(ir_node *node, lower_env_t *env) {
1594         ir_node  *op    = get_Conv_op(node);
1595         ir_mode  *omode = get_irn_mode(node);
1596         ir_node  *block = get_nodes_block(node);
1597         dbg_info *dbg = get_irn_dbg_info(node);
1598         int      idx = get_irn_idx(op);
1599         ir_graph *irg = current_ir_graph;
1600
1601         assert(idx < env->n_entries);
1602
1603         if (! env->entries[idx]->low_word) {
1604                 /* not ready yet, wait */
1605                 pdeq_putr(env->waitq, node);
1606                 return;
1607         }  /* if */
1608
1609         if (mode_is_int(omode) || mode_is_reference(omode)) {
1610                 op = env->entries[idx]->low_word;
1611
1612                 /* simple case: create a high word */
1613                 if (omode != env->params->low_signed)
1614                         op = new_rd_Conv(dbg, irg, block, op, omode);
1615
1616                 set_Conv_op(node, op);
1617         } else {
1618                 ir_node *irn, *call, *in[2];
1619                 ir_mode *imode = env->params->high_signed;
1620                 ir_type *mtp = get_conv_type(imode, omode, env);
1621
1622                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1623                 in[0] = env->entries[idx]->low_word;
1624                 in[1] = env->entries[idx]->high_word;
1625
1626                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1627                 set_irn_pinned(call, get_irn_pinned(node));
1628                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1629
1630                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1631         }  /* if */
1632 }  /* lower_Conv_from_Ls */
1633
1634 /**
1635  * Translate a Conv from higher_unsigned
1636  */
1637 static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
1638         ir_node  *op    = get_Conv_op(node);
1639         ir_mode  *omode = get_irn_mode(node);
1640         ir_node  *block = get_nodes_block(node);
1641         dbg_info *dbg = get_irn_dbg_info(node);
1642         int      idx = get_irn_idx(op);
1643         ir_graph *irg = current_ir_graph;
1644
1645         assert(idx < env->n_entries);
1646
1647         if (! env->entries[idx]->low_word) {
1648                 /* not ready yet, wait */
1649                 pdeq_putr(env->waitq, node);
1650                 return;
1651         }  /* if */
1652
1653         if (mode_is_int(omode) || mode_is_reference(omode)) {
1654                 op = env->entries[idx]->low_word;
1655
1656                 /* simple case: create a high word */
1657                 if (omode != env->params->low_unsigned)
1658                         op = new_rd_Conv(dbg, irg, block, op, omode);
1659
1660                 set_Conv_op(node, op);
1661         } else {
1662                 ir_node *irn, *call, *in[2];
1663                 ir_mode *imode = env->params->high_unsigned;
1664                 ir_type *mtp = get_conv_type(imode, omode, env);
1665
1666                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1667                 in[0] = env->entries[idx]->low_word;
1668                 in[1] = env->entries[idx]->high_word;
1669
1670                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1671                 set_irn_pinned(call, get_irn_pinned(node));
1672                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1673
1674                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1675         }  /* if */
1676 }  /* lower_Conv_from_Lu */
1677
1678 /**
1679  * Translate a Conv.
1680  */
1681 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env) {
1682         mode = get_irn_mode(node);
1683
1684         if (mode == env->params->high_signed) {
1685                 lower_Conv_to_Ls(node, env);
1686         } else if (mode == env->params->high_unsigned) {
1687                 lower_Conv_to_Lu(node, env);
1688         } else {
1689                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1690
1691                 if (mode == env->params->high_signed) {
1692                         lower_Conv_from_Ls(node, env);
1693                 } else if (mode == env->params->high_unsigned) {
1694                         lower_Conv_from_Lu(node, env);
1695                 }  /* if */
1696         }  /* if */
1697 }  /* lower_Conv */
1698
1699 /**
1700  * Lower the method type.
1701  *
1702  * @param mtp  the method type to lower
1703  * @param ent  the lower environment
1704  *
1705  * @return the lowered type
1706  */
1707 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
1708         pmap_entry *entry;
1709         ident      *id, *lid;
1710         ir_type    *res, *value_type;
1711
1712         if (is_lowered_type(mtp))
1713                 return mtp;
1714
1715         entry = pmap_find(lowered_type, mtp);
1716         if (! entry) {
1717                 int i, n, r, n_param, n_res;
1718
1719                 /* count new number of params */
1720                 n_param = n = get_method_n_params(mtp);
1721                 for (i = n_param - 1; i >= 0; --i) {
1722                         ir_type *tp = get_method_param_type(mtp, i);
1723
1724                         if (is_Primitive_type(tp)) {
1725                                 ir_mode *mode = get_type_mode(tp);
1726
1727                                 if (mode == env->params->high_signed ||
1728                                         mode == env->params->high_unsigned)
1729                                         ++n_param;
1730                         }  /* if */
1731                 }  /* for */
1732
1733                 /* count new number of results */
1734                 n_res = r = get_method_n_ress(mtp);
1735                 for (i = n_res - 1; i >= 0; --i) {
1736                         ir_type *tp = get_method_res_type(mtp, i);
1737
1738                         if (is_Primitive_type(tp)) {
1739                                 ir_mode *mode = get_type_mode(tp);
1740
1741                                 if (mode == env->params->high_signed ||
1742                                         mode == env->params->high_unsigned)
1743                                         ++n_res;
1744                         }  /* if */
1745                 }  /* for */
1746
1747                 id  = id_mangle_u(new_id_from_chars("L", 1), get_type_ident(mtp));
1748                 res = new_type_method(id, n_param, n_res);
1749
1750                 /* set param types and result types */
1751                 for (i = n_param = 0; i < n; ++i) {
1752                         ir_type *tp = get_method_param_type(mtp, i);
1753
1754                         if (is_Primitive_type(tp)) {
1755                                 ir_mode *mode = get_type_mode(tp);
1756
1757                                 if (mode == env->params->high_signed) {
1758                                         set_method_param_type(res, n_param++, tp_u);
1759                                         set_method_param_type(res, n_param++, tp_s);
1760                                 } else if (mode == env->params->high_unsigned) {
1761                                         set_method_param_type(res, n_param++, tp_u);
1762                                         set_method_param_type(res, n_param++, tp_u);
1763                                 } else {
1764                                         set_method_param_type(res, n_param++, tp);
1765                                 }  /* if */
1766                         } else {
1767                                 set_method_param_type(res, n_param++, tp);
1768                         }  /* if */
1769                 }  /* for */
1770                 for (i = n_res = 0; i < r; ++i) {
1771                         ir_type *tp = get_method_res_type(mtp, i);
1772
1773                         if (is_Primitive_type(tp)) {
1774                                 ir_mode *mode = get_type_mode(tp);
1775
1776                                 if (mode == env->params->high_signed) {
1777                                         set_method_res_type(res, n_res++, tp_u);
1778                                         set_method_res_type(res, n_res++, tp_s);
1779                                 } else if (mode == env->params->high_unsigned) {
1780                                         set_method_res_type(res, n_res++, tp_u);
1781                                         set_method_res_type(res, n_res++, tp_u);
1782                                 } else {
1783                                         set_method_res_type(res, n_res++, tp);
1784                                 }  /* if */
1785                         } else {
1786                                 set_method_res_type(res, n_res++, tp);
1787                         }  /* if */
1788                 }  /* for */
1789                 set_lowered_type(mtp, res);
1790                 pmap_insert(lowered_type, mtp, res);
1791
1792                 value_type = get_method_value_param_type(mtp);
1793                 if (value_type != NULL) {
1794                         /* this creates a new value parameter type */
1795                         (void)get_method_value_param_ent(res, 0);
1796
1797                         /* set new param positions */
1798                         for (i = n_param = 0; i < n; ++i) {
1799                                 ir_type   *tp  = get_method_param_type(mtp, i);
1800                                 ident     *id  = get_method_param_ident(mtp, i);
1801                                 ir_entity *ent = get_method_value_param_ent(mtp, i);
1802
1803                                 set_entity_link(ent, INT_TO_PTR(n_param));
1804                                 if (is_Primitive_type(tp)) {
1805                                         ir_mode *mode = get_type_mode(tp);
1806
1807                                         if (mode == env->params->high_signed || mode == env->params->high_unsigned) {
1808                                                 if (id != NULL) {
1809                                                         lid = id_mangle(id, env->first_id);
1810                                                         set_method_param_ident(res, n_param, lid);
1811                                                         set_entity_ident(get_method_value_param_ent(res, n_param), lid);
1812                                                         lid = id_mangle(id, env->next_id);
1813                                                         set_method_param_ident(res, n_param + 1, lid);
1814                                                         set_entity_ident(get_method_value_param_ent(res, n_param + 1), lid);
1815                                                 }  /* if */
1816                                                 n_param += 2;
1817                                                 continue;
1818                                         }  /* if */
1819                                 }  /* if */
1820                                 if (id != NULL) {
1821                                         set_method_param_ident(res, n_param, id);
1822                                         set_entity_ident(get_method_value_param_ent(res, n_param), id);
1823                                 }  /* if */
1824                                 ++n_param;
1825                         }  /* for */
1826
1827                         set_lowered_type(value_type, get_method_value_param_type(res));
1828                 }  /* if */
1829         } else {
1830                 res = entry->value;
1831         }  /* if */
1832         return res;
1833 }  /* lower_mtp */
1834
1835 /**
1836  * Translate a Return.
1837  */
1838 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
1839         ir_graph  *irg = current_ir_graph;
1840         ir_entity *ent = get_irg_entity(irg);
1841         ir_type   *mtp = get_entity_type(ent);
1842         ir_node   **in;
1843         int       i, j, n, idx;
1844         int       need_conv = 0;
1845         (void) mode;
1846
1847         /* check if this return must be lowered */
1848         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1849                 ir_node *pred = get_Return_res(node, i);
1850                 ir_mode *mode = get_irn_op_mode(pred);
1851
1852                 if (mode == env->params->high_signed ||
1853                         mode == env->params->high_unsigned) {
1854                         idx = get_irn_idx(pred);
1855                         if (! env->entries[idx]->low_word) {
1856                                 /* not ready yet, wait */
1857                                 pdeq_putr(env->waitq, node);
1858                                 return;
1859                         }  /* if */
1860                         need_conv = 1;
1861                 }  /* if */
1862         }  /* for */
1863         if (! need_conv)
1864                 return;
1865
1866         ent = get_irg_entity(irg);
1867         mtp = get_entity_type(ent);
1868
1869         mtp = lower_mtp(mtp, env);
1870         set_entity_type(ent, mtp);
1871
1872         /* create a new in array */
1873         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1874         in[0] = get_Return_mem(node);
1875
1876         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1877                 ir_node *pred = get_Return_res(node, i);
1878
1879                 idx = get_irn_idx(pred);
1880                 assert(idx < env->n_entries);
1881
1882                 if (env->entries[idx]) {
1883                         in[++j] = env->entries[idx]->low_word;
1884                         in[++j] = env->entries[idx]->high_word;
1885                 } else {
1886                         in[++j] = pred;
1887                 }  /* if */
1888         }  /* for */
1889
1890         set_irn_in(node, j+1, in);
1891 }  /* lower_Return */
1892
1893 /**
1894  * Translate the parameters.
1895  */
1896 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env) {
1897         ir_graph  *irg = current_ir_graph;
1898         ir_entity *ent = get_irg_entity(irg);
1899         ir_type   *tp  = get_entity_type(ent);
1900         ir_type   *mtp;
1901         long      *new_projs;
1902         int       i, j, n_params, rem;
1903         ir_node   *proj, *args;
1904         (void) mode;
1905
1906         if (is_lowered_type(tp)) {
1907                 mtp = get_associated_type(tp);
1908         } else {
1909                 mtp = tp;
1910         }  /* if */
1911         assert(! is_lowered_type(mtp));
1912
1913         n_params = get_method_n_params(mtp);
1914         if (n_params <= 0)
1915                 return;
1916
1917         NEW_ARR_A(long, new_projs, n_params);
1918
1919         /* first check if we have parameters that must be fixed */
1920         for (i = j = 0; i < n_params; ++i, ++j) {
1921                 ir_type *tp = get_method_param_type(mtp, i);
1922
1923                 new_projs[i] = j;
1924                 if (is_Primitive_type(tp)) {
1925                         ir_mode *mode = get_type_mode(tp);
1926
1927                         if (mode == env->params->high_signed ||
1928                                 mode == env->params->high_unsigned)
1929                                 ++j;
1930                 }  /* if */
1931         }  /* for */
1932         if (i == j)
1933                 return;
1934
1935         mtp = lower_mtp(mtp, env);
1936         set_entity_type(ent, mtp);
1937
1938         /* switch off optimization for new Proj nodes or they might be CSE'ed
1939            with not patched one's */
1940         rem = get_optimize();
1941         set_optimize(0);
1942
1943         /* ok, fix all Proj's and create new ones */
1944         args = get_irg_args(irg);
1945         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1946                 ir_node *pred = get_Proj_pred(proj);
1947                 long proj_nr;
1948                 int idx;
1949                 ir_mode *mode;
1950                 dbg_info *dbg;
1951
1952                 /* do not visit this node again */
1953                 mark_irn_visited(proj);
1954
1955                 if (pred != args)
1956                         continue;
1957
1958                 proj_nr = get_Proj_proj(proj);
1959                 set_Proj_proj(proj, new_projs[proj_nr]);
1960
1961                 idx = get_irn_idx(proj);
1962                 if (env->entries[idx]) {
1963                         ir_mode *low_mode = env->params->low_unsigned;
1964
1965                         mode = get_irn_mode(proj);
1966
1967                         if (mode == env->params->high_signed) {
1968                                 mode = env->params->low_signed;
1969                         } else {
1970                                 mode = env->params->low_unsigned;
1971                         }  /* if */
1972
1973                         dbg = get_irn_dbg_info(proj);
1974                         env->entries[idx]->low_word  =
1975                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, low_mode, new_projs[proj_nr]);
1976                         env->entries[idx]->high_word =
1977                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, mode, new_projs[proj_nr] + 1);
1978                 }  /* if */
1979         }  /* for */
1980         set_optimize(rem);
1981 }  /* lower_Start */
1982
1983 /**
1984  * Translate a Call.
1985  */
1986 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
1987         ir_graph *irg = current_ir_graph;
1988         ir_type  *tp = get_Call_type(node);
1989         ir_type  *call_tp;
1990         ir_node  **in, *proj, *results;
1991         int      n_params, n_res, need_lower = 0;
1992         int      i, j;
1993         long     *res_numbers = NULL;
1994         (void) mode;
1995
1996         if (is_lowered_type(tp)) {
1997                 call_tp = get_associated_type(tp);
1998         } else {
1999                 call_tp = tp;
2000         }  /* if */
2001
2002         assert(! is_lowered_type(call_tp));
2003
2004         n_params = get_method_n_params(call_tp);
2005         for (i = 0; i < n_params; ++i) {
2006                 ir_type *tp = get_method_param_type(call_tp, i);
2007
2008                 if (is_Primitive_type(tp)) {
2009                         ir_mode *mode = get_type_mode(tp);
2010
2011                         if (mode == env->params->high_signed ||
2012                                 mode == env->params->high_unsigned) {
2013                                 need_lower = 1;
2014                                 break;
2015                         }  /* if */
2016                 }  /* if */
2017         }  /* for */
2018         n_res = get_method_n_ress(call_tp);
2019         if (n_res > 0) {
2020                 NEW_ARR_A(long, res_numbers, n_res);
2021
2022                 for (i = j = 0; i < n_res; ++i, ++j) {
2023                         ir_type *tp = get_method_res_type(call_tp, i);
2024
2025                         res_numbers[i] = j;
2026                         if (is_Primitive_type(tp)) {
2027                                 ir_mode *mode = get_type_mode(tp);
2028
2029                                 if (mode == env->params->high_signed ||
2030                                         mode == env->params->high_unsigned) {
2031                                         need_lower = 1;
2032                                         ++j;
2033                                 }  /* if */
2034                         }  /* if */
2035                 }  /* for */
2036         }  /* if */
2037
2038         if (! need_lower)
2039                 return;
2040
2041         /* let's lower it */
2042         call_tp = lower_mtp(call_tp, env);
2043         set_Call_type(node, call_tp);
2044
2045         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
2046
2047         in[0] = get_Call_mem(node);
2048         in[1] = get_Call_ptr(node);
2049
2050         for (j = 2, i = 0; i < n_params; ++i) {
2051                 ir_node *pred = get_Call_param(node, i);
2052                 int     idx = get_irn_idx(pred);
2053
2054                 if (env->entries[idx]) {
2055                         if (! env->entries[idx]->low_word) {
2056                                 /* not ready yet, wait */
2057                                 pdeq_putr(env->waitq, node);
2058                                 return;
2059                         }
2060                         in[j++] = env->entries[idx]->low_word;
2061                         in[j++] = env->entries[idx]->high_word;
2062                 } else {
2063                         in[j++] = pred;
2064                 }  /* if */
2065         }  /* for */
2066
2067         set_irn_in(node, j, in);
2068
2069         /* fix the results */
2070         results = NULL;
2071         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
2072                 long proj_nr = get_Proj_proj(proj);
2073
2074                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
2075                         /* found the result proj */
2076                         results = proj;
2077                         break;
2078                 }  /* if */
2079         }  /* for */
2080
2081         if (results) {          /* there are results */
2082                 int rem = get_optimize();
2083
2084                 /* switch off optimization for new Proj nodes or they might be CSE'ed
2085                    with not patched one's */
2086                 set_optimize(0);
2087                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
2088                         if (get_Proj_pred(proj) == results) {
2089                                 long proj_nr = get_Proj_proj(proj);
2090                                 int idx;
2091
2092                                 /* found a result */
2093                                 set_Proj_proj(proj, res_numbers[proj_nr]);
2094                                 idx = get_irn_idx(proj);
2095                                 if (env->entries[idx]) {
2096                                         ir_mode *mode = get_irn_mode(proj);
2097                                         ir_mode *low_mode = env->params->low_unsigned;
2098                                         dbg_info *dbg;
2099
2100                                         if (mode == env->params->high_signed) {
2101                                                 mode = env->params->low_signed;
2102                                         } else {
2103                                                 mode = env->params->low_unsigned;
2104                                         }  /* if */
2105
2106                                         dbg = get_irn_dbg_info(proj);
2107                                         env->entries[idx]->low_word  =
2108                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, low_mode, res_numbers[proj_nr]);
2109                                         env->entries[idx]->high_word =
2110                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, mode, res_numbers[proj_nr] + 1);
2111                                 }  /* if */
2112                                 mark_irn_visited(proj);
2113                         }  /* if */
2114                 }  /* for */
2115                 set_optimize(rem);
2116         }
2117 }  /* lower_Call */
2118
2119 /**
2120  * Translate an Unknown into two.
2121  */
2122 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env) {
2123         int      idx = get_irn_idx(node);
2124         ir_graph *irg = current_ir_graph;
2125         ir_mode  *low_mode = env->params->low_unsigned;
2126
2127         env->entries[idx]->low_word  = new_r_Unknown(irg, low_mode);
2128         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2129 }  /* lower_Unknown */
2130
2131 /**
2132  * Translate a Phi.
2133  *
2134  * First step: just create two templates
2135  */
2136 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
2137         ir_mode  *mode_l = env->params->low_unsigned;
2138         ir_graph *irg = current_ir_graph;
2139         ir_node  *block, *unk_l, *unk_h, *phi_l, *phi_h;
2140         ir_node  **inl, **inh;
2141         dbg_info *dbg;
2142         int      idx, i, arity = get_Phi_n_preds(phi);
2143         int      enq = 0;
2144
2145         idx = get_irn_idx(phi);
2146         if (env->entries[idx]->low_word) {
2147                 /* Phi nodes already build, check for inputs */
2148                 ir_node *phil = env->entries[idx]->low_word;
2149                 ir_node *phih = env->entries[idx]->high_word;
2150
2151                 for (i = 0; i < arity; ++i) {
2152                         ir_node *pred = get_Phi_pred(phi, i);
2153                         int     idx = get_irn_idx(pred);
2154
2155                         if (env->entries[idx]->low_word) {
2156                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2157                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2158                         } else {
2159                                 /* still not ready */
2160                                 pdeq_putr(env->waitq, phi);
2161                                 return;
2162                         }  /* if */
2163                 }  /* for */
2164         }  /* if */
2165
2166         /* first create a new in array */
2167         NEW_ARR_A(ir_node *, inl, arity);
2168         NEW_ARR_A(ir_node *, inh, arity);
2169         unk_l = new_r_Unknown(irg, mode_l);
2170         unk_h = new_r_Unknown(irg, mode);
2171
2172         for (i = 0; i < arity; ++i) {
2173                 ir_node *pred = get_Phi_pred(phi, i);
2174                 int     idx = get_irn_idx(pred);
2175
2176                 if (env->entries[idx]->low_word) {
2177                         inl[i] = env->entries[idx]->low_word;
2178                         inh[i] = env->entries[idx]->high_word;
2179                 } else {
2180                         inl[i] = unk_l;
2181                         inh[i] = unk_h;
2182                         enq = 1;
2183                 }  /* if */
2184         }  /* for */
2185
2186         dbg   = get_irn_dbg_info(phi);
2187         block = get_nodes_block(phi);
2188
2189         idx = get_irn_idx(phi);
2190         assert(idx < env->n_entries);
2191         env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, irg, block, arity, inl, mode_l);
2192         env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, irg, block, arity, inh, mode);
2193
2194         /* Don't forget to link the new Phi nodes into the block.
2195          * Beware that some Phis might be optimized away. */
2196         if (is_Phi(phi_l))
2197                 add_Block_phi(block, phi_l);
2198         if (is_Phi(phi_h))
2199                 add_Block_phi(block, phi_h);
2200
2201         if (enq) {
2202                 /* not yet finished */
2203                 pdeq_putr(env->waitq, phi);
2204         }  /* if */
2205 }  /* lower_Phi */
2206
2207 /**
2208  * Translate a Mux.
2209  */
2210 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env) {
2211         ir_graph *irg = current_ir_graph;
2212         ir_node  *block, *val;
2213         ir_node  *true_l, *true_h, *false_l, *false_h, *sel;
2214         dbg_info *dbg;
2215         int      idx;
2216
2217         val = get_Mux_true(mux);
2218         idx = get_irn_idx(val);
2219         if (env->entries[idx]->low_word) {
2220                 /* Values already build */
2221                 true_l = env->entries[idx]->low_word;
2222                 true_h = env->entries[idx]->high_word;
2223         } else {
2224                 /* still not ready */
2225                 pdeq_putr(env->waitq, mux);
2226                 return;
2227         }  /* if */
2228
2229         val = get_Mux_false(mux);
2230         idx = get_irn_idx(val);
2231         if (env->entries[idx]->low_word) {
2232                 /* Values already build */
2233                 false_l = env->entries[idx]->low_word;
2234                 false_h = env->entries[idx]->high_word;
2235         } else {
2236                 /* still not ready */
2237                 pdeq_putr(env->waitq, mux);
2238                 return;
2239         }  /* if */
2240
2241
2242         sel = get_Mux_sel(mux);
2243
2244         dbg   = get_irn_dbg_info(mux);
2245         block = get_nodes_block(mux);
2246
2247         idx = get_irn_idx(mux);
2248         assert(idx < env->n_entries);
2249         env->entries[idx]->low_word  = new_rd_Mux(dbg, irg, block, sel, false_l, true_l, mode);
2250         env->entries[idx]->high_word = new_rd_Mux(dbg, irg, block, sel, false_h, true_h, mode);
2251 }  /* lower_Mux */
2252
2253 /**
2254  * Translate an ASM node.
2255  */
2256 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env) {
2257         ir_mode *his = env->params->high_signed;
2258         ir_mode *hiu = env->params->high_unsigned;
2259         int      i;
2260         ir_node *n;
2261
2262         (void)mode;
2263
2264         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2265                 ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
2266                 if (op_mode == his || op_mode == hiu) {
2267                         panic("lowering ASM unimplemented");
2268                 }  /* if */
2269         }  /* for */
2270
2271         for (n = asmn;;) {
2272                 ir_mode *proj_mode;
2273
2274                 n = get_irn_link(n);
2275                 if (n == NULL)
2276                         break;
2277
2278                 proj_mode = get_irn_mode(n);
2279                 if (proj_mode == his || proj_mode == hiu) {
2280                         panic("lowering ASM unimplemented");
2281                 }  /* if */
2282         }  /* for */
2283 }  /* lower_ASM */
2284
2285 /**
2286  * Translate a Sel node.
2287  */
2288 static void lower_Sel(ir_node *sel, ir_mode *mode, lower_env_t *env) {
2289         (void) mode;
2290
2291         /* we must only lower value parameter Sels if we change the
2292            value parameter type. */
2293         if (env->value_param_tp != NULL) {
2294                 ir_entity *ent = get_Sel_entity(sel);
2295             if (get_entity_owner(ent) == env->value_param_tp) {
2296                         int pos = PTR_TO_INT(get_entity_link(ent));
2297
2298                         ent = get_method_value_param_ent(env->l_mtp, pos);
2299                         set_Sel_entity(sel, ent);
2300                 }  /* if */
2301         }  /* if */
2302 }  /* lower_Sel */
2303
2304 /**
2305  * check for opcodes that must always be lowered.
2306  */
2307 static int always_lower(ir_opcode code) {
2308         switch (code) {
2309         case iro_ASM:
2310         case iro_Proj:
2311         case iro_Start:
2312         case iro_Call:
2313         case iro_Return:
2314         case iro_Cond:
2315         case iro_Conv:
2316         case iro_Sel:
2317                 return 1;
2318         default:
2319                 return 0;
2320         }  /* switch */
2321 }  /* always_lower */
2322
2323 /**
2324  * lower boolean Proj(Cmp)
2325  */
2326 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env) {
2327         int      lidx, ridx;
2328         ir_node  *l, *r, *low, *high, *t, *res;
2329         pn_Cmp   pnc;
2330         ir_node  *blk;
2331         ir_graph *irg = current_ir_graph;
2332         dbg_info *db;
2333
2334         l    = get_Cmp_left(cmp);
2335         lidx = get_irn_idx(l);
2336         if (! env->entries[lidx]->low_word) {
2337                 /* still not ready */
2338                 return NULL;
2339         }  /* if */
2340
2341         r    = get_Cmp_right(cmp);
2342         ridx = get_irn_idx(r);
2343         if (! env->entries[ridx]->low_word) {
2344                 /* still not ready */
2345                 return NULL;
2346         }  /* if */
2347
2348         pnc  = get_Proj_proj(proj);
2349         blk  = get_nodes_block(cmp);
2350         db   = get_irn_dbg_info(cmp);
2351         low  = new_rd_Cmp(db, irg, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2352         high = new_rd_Cmp(db, irg, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2353
2354         if (pnc == pn_Cmp_Eq) {
2355                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2356                 res = new_rd_And(db, irg, blk,
2357                         new_r_Proj(irg, blk, low, mode_b, pnc),
2358                         new_r_Proj(irg, blk, high, mode_b, pnc),
2359                         mode_b);
2360         } else if (pnc == pn_Cmp_Lg) {
2361                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2362                 res = new_rd_Or(db, irg, blk,
2363                         new_r_Proj(irg, blk, low, mode_b, pnc),
2364                         new_r_Proj(irg, blk, high, mode_b, pnc),
2365                         mode_b);
2366         } else {
2367                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2368                 t = new_rd_And(db, irg, blk,
2369                         new_r_Proj(irg, blk, low, mode_b, pnc),
2370                         new_r_Proj(irg, blk, high, mode_b, pn_Cmp_Eq),
2371                         mode_b);
2372                 res = new_rd_Or(db, irg, blk,
2373                         new_r_Proj(irg, blk, high, mode_b, pnc & ~pn_Cmp_Eq),
2374                         t,
2375                         mode_b);
2376         }  /* if */
2377         return res;
2378 }  /* lower_boolean_Proj_Cmp */
2379
2380 /**
2381  * The type of a lower function.
2382  *
2383  * @param node   the node to be lowered
2384  * @param mode   the low mode for the destination node
2385  * @param env    the lower environment
2386  */
2387 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2388
2389 /**
2390  * Lower a node.
2391  */
2392 static void lower_ops(ir_node *node, void *env)
2393 {
2394         lower_env_t  *lenv = env;
2395         node_entry_t *entry;
2396         int          idx = get_irn_idx(node);
2397         ir_mode      *mode = get_irn_mode(node);
2398
2399         if (mode == mode_b || is_Mux(node) || is_Conv(node)) {
2400                 int i;
2401
2402                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2403                         ir_node *proj = get_irn_n(node, i);
2404
2405                         if (is_Proj(proj)) {
2406                                 ir_node *cmp = get_Proj_pred(proj);
2407
2408                                 if (is_Cmp(cmp)) {
2409                                         ir_node *arg = get_Cmp_left(cmp);
2410
2411                                         mode = get_irn_mode(arg);
2412                                         if (mode == lenv->params->high_signed ||
2413                                                 mode == lenv->params->high_unsigned) {
2414                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2415
2416                                                 if (res == NULL) {
2417                                                         /* could not lower because predecessors not ready */
2418                                                         waitq_put(lenv->waitq, node);
2419                                                         return;
2420                                                 }  /* if */
2421                                                 set_irn_n(node, i, res);
2422                                         }  /* if */
2423                                 }  /* if */
2424                         }  /* if */
2425                 }  /* for */
2426         }  /* if */
2427
2428         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2429         if (entry || always_lower(get_irn_opcode(node))) {
2430                 ir_op      *op = get_irn_op(node);
2431                 lower_func func = (lower_func)op->ops.generic;
2432
2433                 if (func) {
2434                         mode = get_irn_op_mode(node);
2435
2436                         if (mode == lenv->params->high_signed)
2437                                 mode = lenv->params->low_signed;
2438                         else
2439                                 mode = lenv->params->low_unsigned;
2440
2441                         DB((dbg, LEVEL_1, "  %+F\n", node));
2442                         func(node, mode, lenv);
2443                 }  /* if */
2444         }  /* if */
2445 }  /* lower_ops */
2446
2447 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2448
2449 /**
2450  * Compare two op_mode_entry_t's.
2451  */
2452 static int cmp_op_mode(const void *elt, const void *key, size_t size) {
2453         const op_mode_entry_t *e1 = elt;
2454         const op_mode_entry_t *e2 = key;
2455         (void) size;
2456
2457         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2458 }  /* cmp_op_mode */
2459
2460 /**
2461  * Compare two conv_tp_entry_t's.
2462  */
2463 static int cmp_conv_tp(const void *elt, const void *key, size_t size) {
2464         const conv_tp_entry_t *e1 = elt;
2465         const conv_tp_entry_t *e2 = key;
2466         (void) size;
2467
2468         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2469 }  /* cmp_conv_tp */
2470
2471 /**
2472  * Enter a lowering function into an ir_op.
2473  */
2474 static void enter_lower_func(ir_op *op, lower_func func) {
2475         op->ops.generic = (op_func)func;
2476 }  /* enter_lower_func */
2477
2478 /**
2479  * Returns non-zero if a method type must be lowered.
2480  *
2481  * @param mtp  the method type
2482  */
2483 static int mtp_must_to_lowered(ir_type *mtp, lower_env_t *env) {
2484         int i, n_params;
2485
2486         n_params = get_method_n_params(mtp);
2487         if (n_params <= 0)
2488                 return 0;
2489
2490         /* first check if we have parameters that must be fixed */
2491         for (i = 0; i < n_params; ++i) {
2492                 ir_type *tp = get_method_param_type(mtp, i);
2493
2494                 if (is_Primitive_type(tp)) {
2495                         ir_mode *mode = get_type_mode(tp);
2496
2497                         if (mode == env->params->high_signed ||
2498                                 mode == env->params->high_unsigned)
2499                                 return 1;
2500                 }  /* if */
2501         }  /* for */
2502         return 0;
2503 }  /* mtp_must_to_lowered */
2504
2505 /*
2506  * Do the lowering.
2507  */
2508 void lower_dw_ops(const lwrdw_param_t *param)
2509 {
2510         lower_env_t lenv;
2511         int         i;
2512         ir_graph    *rem;
2513
2514         if (! param)
2515                 return;
2516
2517         if (! param->enable)
2518                 return;
2519
2520         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2521
2522         assert(2 * get_mode_size_bits(param->low_signed)   == get_mode_size_bits(param->high_signed));
2523         assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
2524         assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
2525
2526         /* create the necessary maps */
2527         if (! prim_types)
2528                 prim_types = pmap_create();
2529         if (! intrinsic_fkt)
2530                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2531         if (! conv_types)
2532                 conv_types = new_set(cmp_conv_tp, 16);
2533         if (! lowered_type)
2534                 lowered_type = pmap_create();
2535
2536         /* create a primitive unsigned and signed type */
2537         if (! tp_u)
2538                 tp_u = get_primitive_type(param->low_unsigned);
2539         if (! tp_s)
2540                 tp_s = get_primitive_type(param->low_signed);
2541
2542         /* create method types for the created binop calls */
2543         if (! binop_tp_u) {
2544                 binop_tp_u = new_type_method(IDENT("binop_u_intrinsic"), 4, 2);
2545                 set_method_param_type(binop_tp_u, 0, tp_u);
2546                 set_method_param_type(binop_tp_u, 1, tp_u);
2547                 set_method_param_type(binop_tp_u, 2, tp_u);
2548                 set_method_param_type(binop_tp_u, 3, tp_u);
2549                 set_method_res_type(binop_tp_u, 0, tp_u);
2550                 set_method_res_type(binop_tp_u, 1, tp_u);
2551         }  /* if */
2552         if (! binop_tp_s) {
2553                 binop_tp_s = new_type_method(IDENT("binop_s_intrinsic"), 4, 2);
2554                 set_method_param_type(binop_tp_s, 0, tp_u);
2555                 set_method_param_type(binop_tp_s, 1, tp_s);
2556                 set_method_param_type(binop_tp_s, 2, tp_u);
2557                 set_method_param_type(binop_tp_s, 3, tp_s);
2558                 set_method_res_type(binop_tp_s, 0, tp_u);
2559                 set_method_res_type(binop_tp_s, 1, tp_s);
2560         }  /* if */
2561         if (! shiftop_tp_u) {
2562                 shiftop_tp_u = new_type_method(IDENT("shiftop_u_intrinsic"), 3, 2);
2563                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2564                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2565                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2566                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2567                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2568         }  /* if */
2569         if (! shiftop_tp_s) {
2570                 shiftop_tp_s = new_type_method(IDENT("shiftop_s_intrinsic"), 3, 2);
2571                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2572                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2573                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2574                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2575                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2576         }  /* if */
2577         if (! unop_tp_u) {
2578                 unop_tp_u = new_type_method(IDENT("unop_u_intrinsic"), 2, 2);
2579                 set_method_param_type(unop_tp_u, 0, tp_u);
2580                 set_method_param_type(unop_tp_u, 1, tp_u);
2581                 set_method_res_type(unop_tp_u, 0, tp_u);
2582                 set_method_res_type(unop_tp_u, 1, tp_u);
2583         }  /* if */
2584         if (! unop_tp_s) {
2585                 unop_tp_s = new_type_method(IDENT("unop_s_intrinsic"), 2, 2);
2586                 set_method_param_type(unop_tp_s, 0, tp_u);
2587                 set_method_param_type(unop_tp_s, 1, tp_s);
2588                 set_method_res_type(unop_tp_s, 0, tp_u);
2589                 set_method_res_type(unop_tp_s, 1, tp_s);
2590         }  /* if */
2591
2592         lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), param->low_unsigned);
2593         lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), param->low_unsigned);
2594         lenv.waitq         = new_pdeq();
2595         lenv.params        = param;
2596         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
2597         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
2598
2599         /* first clear the generic function pointer for all ops */
2600         clear_irp_opcodes_generic_func();
2601
2602 #define LOWER2(op, fkt)   enter_lower_func(op_##op, fkt)
2603 #define LOWER(op)         LOWER2(op, lower_##op)
2604 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2605 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2606
2607         /* the table of all operations that must be lowered follows */
2608         LOWER(ASM);
2609         LOWER(Load);
2610         LOWER(Store);
2611         LOWER(Const);
2612         LOWER(And);
2613         LOWER(Or);
2614         LOWER(Eor);
2615         LOWER(Not);
2616         LOWER(Cond);
2617         LOWER(Return);
2618         LOWER(Call);
2619         LOWER(Unknown);
2620         LOWER(Phi);
2621         LOWER(Mux);
2622         LOWER(Start);
2623
2624         LOWER_BIN(Add);
2625         LOWER_BIN(Sub);
2626         LOWER_BIN(Mul);
2627         LOWER(Shl);
2628         LOWER(Shr);
2629         LOWER(Shrs);
2630         LOWER(Rotl);
2631         LOWER(DivMod);
2632         LOWER(Div);
2633         LOWER(Mod);
2634         LOWER(Sel);
2635         LOWER_UN(Abs);
2636         LOWER_UN(Minus);
2637
2638         LOWER(Conv);
2639
2640 #undef LOWER_UN
2641 #undef LOWER_BIN
2642 #undef LOWER
2643 #undef LOWER2
2644
2645         /* transform all graphs */
2646         rem = current_ir_graph;
2647         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2648                 ir_graph  *irg = get_irp_irg(i);
2649                 ir_entity *ent;
2650                 ir_type   *mtp;
2651                 int n_idx;
2652
2653                 obstack_init(&lenv.obst);
2654
2655                 n_idx = get_irg_last_idx(irg);
2656                 n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2657                 lenv.n_entries = n_idx;
2658                 lenv.entries   = NEW_ARR_F(node_entry_t *, n_idx);
2659                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2660
2661                 lenv.l_mtp        = NULL;
2662                 lenv.flags        = 0;
2663                 lenv.proj_2_block = pmap_create();
2664 #ifndef NDEBUG
2665                 lenv.value_param_tp = NULL;
2666 #endif
2667                 ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2668
2669                 ent = get_irg_entity(irg);
2670                 mtp = get_entity_type(ent);
2671
2672                 if (mtp_must_to_lowered(mtp, &lenv)) {
2673                         ir_type *ltp = lower_mtp(mtp, &lenv);
2674                         lenv.flags |= MUST_BE_LOWERED;
2675                         set_entity_type(ent, ltp);
2676                         lenv.l_mtp = ltp;
2677 #ifndef NDEBUG
2678                         lenv.value_param_tp = get_method_value_param_type(mtp);
2679 #endif
2680                 }  /* if */
2681
2682                 /* first step: link all nodes and allocate data */
2683                 irg_walk_graph(irg, firm_clear_node_and_phi_links, prepare_links_and_handle_rotl, &lenv);
2684
2685                 if (lenv.flags & MUST_BE_LOWERED) {
2686                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2687
2688                         /* must do some work */
2689                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2690
2691                         /* last step: all waiting nodes */
2692                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2693                         current_ir_graph = irg;
2694                         while (! pdeq_empty(lenv.waitq)) {
2695                                 ir_node *node = pdeq_getl(lenv.waitq);
2696
2697                                 lower_ops(node, &lenv);
2698                         }  /* while */
2699
2700                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2701
2702                         /* outs are invalid, we changed the graph */
2703                         set_irg_outs_inconsistent(irg);
2704
2705                         if (lenv.flags & CF_CHANGED) {
2706                                 /* control flow changed, dominance info is invalid */
2707                                 set_irg_doms_inconsistent(irg);
2708                                 set_irg_extblk_inconsistent(irg);
2709                                 set_irg_loopinfo_inconsistent(irg);
2710                         }  /* if */
2711                 } else {
2712                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2713                 }  /* if */
2714                 pmap_destroy(lenv.proj_2_block);
2715                 DEL_ARR_F(lenv.entries);
2716                 obstack_free(&lenv.obst, NULL);
2717         }  /* for */
2718         del_pdeq(lenv.waitq);
2719         current_ir_graph = rem;
2720 }  /* lower_dw_ops */
2721
2722 /* Default implementation. */
2723 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2724                                     const ir_mode *imode, const ir_mode *omode,
2725                                     void *context)
2726 {
2727         char buf[64];
2728         ident *id;
2729         ir_entity *ent;
2730         (void) context;
2731
2732         if (imode == omode) {
2733                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2734         } else {
2735                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2736                         get_mode_name(imode), get_mode_name(omode));
2737         }  /* if */
2738         id = new_id_from_str(buf);
2739
2740         ent = new_entity(get_glob_type(), id, method);
2741         set_entity_ld_ident(ent, get_entity_ident(ent));
2742         set_entity_visibility(ent, visibility_external_allocated);
2743         return ent;
2744 }  /* def_create_intrinsic_fkt */