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

   1 /*
   2  * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
   3  *
   4  * This file is part of libFirm.
   5  *
   6  * This file may be distributed and/or modified under the terms of the
   7  * GNU General Public License version 2 as published by the Free Software
   8  * Foundation and appearing in the file LICENSE.GPL included in the
   9  * packaging of this file.
  10  *
  11  * Licensees holding valid libFirm Professional Edition licenses may use
  12  * this file in accordance with the libFirm Commercial License.
  13  * Agreement provided with the Software.
  14  *
  15  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  16  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE.
  18  */
  19
  20 /**
  21  * @file
  22  * @brief   Lower Double word operations, ie 64bit -> 32bit, 32bit -> 16bit etc.
  23  * @date    8.10.2004
  24  * @author  Michael Beck
  25  * @version $Id$
  26  */
  27 #include "config.h"
  28
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <assert.h>
  32
  33 #include "error.h"
  34 #include "lowering.h"
  35 #include "irnode_t.h"
  36 #include "irgraph_t.h"
  37 #include "irmode_t.h"
  38 #include "iropt_t.h"
  39 #include "irgmod.h"
  40 #include "tv_t.h"
  41 #include "dbginfo_t.h"
  42 #include "iropt_dbg.h"
  43 #include "irflag_t.h"
  44 #include "firmstat.h"
  45 #include "irgwalk.h"
  46 #include "ircons.h"
  47 #include "irflag.h"
  48 #include "irtools.h"
  49 #include "debug.h"
  50 #include "set.h"
  51 #include "pmap.h"
  52 #include "pdeq.h"
  53 #include "irdump.h"
  54 #include "array_t.h"
  55 #include "irpass_t.h"
  56
  57 /** A map from mode to a primitive type. */
  58 static pmap *prim_types;
  59
  60 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  61 static set *intrinsic_fkt;
  62
  63 /** A map from (imode, omode) to conv function types. */
  64 static set *conv_types;
  65
  66 /** A map from a method type to its lowered type. */
  67 static pmap *lowered_type;
  68
  69 /** The types for the binop and unop intrinsics. */
  70 static ir_type *binop_tp_u, *binop_tp_s, *unop_tp_u, *unop_tp_s, *shiftop_tp_u, *shiftop_tp_s, *tp_s, *tp_u;
  71
  72 /** the debug handle */
  73 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  74
  75 /**
  76  * An entry in the (op, imode, omode) -> entity map.
  77  */
  78 typedef struct _op_mode_entry {
  79         const ir_op   *op;    /**< the op */
  80         const ir_mode *imode; /**< the input mode */
  81         const ir_mode *omode; /**< the output mode */
  82         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  83 } op_mode_entry_t;
  84
  85 /**
  86  * An entry in the (imode, omode) -> tp map.
  87  */
  88 typedef struct _conv_tp_entry {
  89         const ir_mode *imode; /**< the input mode */
  90         const ir_mode *omode; /**< the output mode */
  91         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
  92 } conv_tp_entry_t;
  93
  94 /**
  95  * Every double word node will be replaced,
  96  * we need some store to hold the replacement:
  97  */
  98 typedef struct _node_entry_t {
  99         ir_node *low_word;    /**< the low word */
 100         ir_node *high_word;   /**< the high word */
 101 } node_entry_t;
 102
 103 enum lower_flags {
 104         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 105         CF_CHANGED      = 2,  /**< control flow was changed */
 106 };
 107
 108 /**
 109  * The lower environment.
 110  */
 111 typedef struct _lower_env_t {
 112         node_entry_t **entries;       /**< entries per node */
 113         struct obstack obst;          /**< an obstack holding the temporary data */
 114         ir_type  *l_mtp;              /**< lowered method type of the current method */
 115         tarval   *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 116         tarval   *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 117         pdeq     *waitq;              /**< a wait queue of all nodes that must be handled later */
 118         pmap     *proj_2_block;       /**< a map from ProjX to its destination blocks */
 119         ident    *first_id;           /**< .l for little and .h for big endian */
 120         ident    *next_id;            /**< .h for little and .l for big endian */
 121         const lwrdw_param_t *params;  /**< transformation parameter */
 122         unsigned flags;               /**< some flags */
 123         int      n_entries;           /**< number of entries */
 124         ir_type  *value_param_tp;     /**< the old value param type */
 125 } lower_env_t;
 126
 127 /**
 128  * Get a primitive mode for a mode.
 129  */
 130 static ir_type *get_primitive_type(ir_mode *mode) {
 131         pmap_entry *entry = pmap_find(prim_types, mode);
 132         ir_type *tp;
 133         char buf[64];
 134
 135         if (entry)
 136                 return entry->value;
 137
 138         snprintf(buf, sizeof(buf), "_prim_%s", get_mode_name(mode));
 139         tp = new_type_primitive(new_id_from_str(buf), mode);
 140
 141         pmap_insert(prim_types, mode, tp);
 142         return tp;
 143 }  /* get_primitive_type */
 144
 145 /**
 146  * Create a method type for a Conv emulation from imode to omode.
 147  */
 148 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env) {
 149         conv_tp_entry_t key, *entry;
 150         ir_type *mtd;
 151
 152         key.imode = imode;
 153         key.omode = omode;
 154         key.mtd   = NULL;
 155
 156         entry = set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 157         if (! entry->mtd) {
 158                 int n_param = 1, n_res = 1;
 159                 char buf[64];
 160
 161                 if (imode == env->params->high_signed || imode == env->params->high_unsigned)
 162                         n_param = 2;
 163                 if (omode == env->params->high_signed || omode == env->params->high_unsigned)
 164                         n_res = 2;
 165
 166                 /* create a new one */
 167                 snprintf(buf, sizeof(buf), "LConv%s%s", get_mode_name(imode), get_mode_name(omode));
 168                 mtd = new_type_method(new_id_from_str(buf), n_param, n_res);
 169
 170                 /* set param types and result types */
 171                 n_param = 0;
 172                 if (imode == env->params->high_signed) {
 173                         set_method_param_type(mtd, n_param++, tp_u);
 174                         set_method_param_type(mtd, n_param++, tp_s);
 175                 } else if (imode == env->params->high_unsigned) {
 176                         set_method_param_type(mtd, n_param++, tp_u);
 177                         set_method_param_type(mtd, n_param++, tp_u);
 178                 } else {
 179                         ir_type *tp = get_primitive_type(imode);
 180                         set_method_param_type(mtd, n_param++, tp);
 181                 }  /* if */
 182
 183                 n_res = 0;
 184                 if (omode == env->params->high_signed) {
 185                         set_method_res_type(mtd, n_res++, tp_u);
 186                         set_method_res_type(mtd, n_res++, tp_s);
 187                 } else if (omode == env->params->high_unsigned) {
 188                         set_method_res_type(mtd, n_res++, tp_u);
 189                         set_method_res_type(mtd, n_res++, tp_u);
 190                 } else {
 191                         ir_type *tp = get_primitive_type(omode);
 192                         set_method_res_type(mtd, n_res++, tp);
 193                 }  /* if */
 194                 entry->mtd = mtd;
 195         } else {
 196                 mtd = entry->mtd;
 197         }  /* if */
 198         return mtd;
 199 }  /* get_conv_type */
 200
 201 /**
 202  * Add an additional control flow input to a block.
 203  * Patch all Phi nodes. The new Phi inputs are copied from
 204  * old input number nr.
 205  */
 206 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 207 {
 208         int i, arity = get_irn_arity(block);
 209         ir_node **in, *phi;
 210
 211         assert(nr < arity);
 212
 213         NEW_ARR_A(ir_node *, in, arity + 1);
 214         for (i = 0; i < arity; ++i)
 215                 in[i] = get_irn_n(block, i);
 216         in[i] = cf;
 217
 218         set_irn_in(block, i + 1, in);
 219
 220         for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
 221                 for (i = 0; i < arity; ++i)
 222                         in[i] = get_irn_n(phi, i);
 223                 in[i] = in[nr];
 224                 set_irn_in(phi, i + 1, in);
 225         }  /* for */
 226 }  /* add_block_cf_input_nr */
 227
 228 /**
 229  * Add an additional control flow input to a block.
 230  * Patch all Phi nodes. The new Phi inputs are copied from
 231  * old input from cf tmpl.
 232  */
 233 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 234 {
 235         int i, arity = get_irn_arity(block);
 236         int nr = 0;
 237
 238         for (i = 0; i < arity; ++i) {
 239                 if (get_irn_n(block, i) == tmpl) {
 240                         nr = i;
 241                         break;
 242                 }  /* if */
 243         }  /* for */
 244         assert(i < arity);
 245         add_block_cf_input_nr(block, nr, cf);
 246 }  /* add_block_cf_input */
 247
 248 /**
 249  * Return the "operational" mode of a Firm node.
 250  */
 251 static ir_mode *get_irn_op_mode(ir_node *node)
 252 {
 253         switch (get_irn_opcode(node)) {
 254         case iro_Load:
 255                 return get_Load_mode(node);
 256         case iro_Store:
 257                 return get_irn_mode(get_Store_value(node));
 258         case iro_DivMod:
 259                 return get_irn_mode(get_DivMod_left(node));
 260         case iro_Div:
 261                 return get_irn_mode(get_Div_left(node));
 262         case iro_Mod:
 263                 return get_irn_mode(get_Mod_left(node));
 264         case iro_Cmp:
 265                 return get_irn_mode(get_Cmp_left(node));
 266         default:
 267                 return get_irn_mode(node);
 268         }  /* switch */
 269 }  /* get_irn_op_mode */
 270
 271 /**
 272  * Walker, prepare the node links.
 273  */
 274 static void prepare_links(ir_node *node, void *env)
 275 {
 276         lower_env_t  *lenv = env;
 277         ir_mode      *mode = get_irn_op_mode(node);
 278         node_entry_t *link;
 279         int          i, idx;
 280
 281         if (mode == lenv->params->high_signed ||
 282                 mode == lenv->params->high_unsigned) {
 283                 /* ok, found a node that will be lowered */
 284                 link = OALLOCZ(&lenv->obst, node_entry_t);
 285
 286                 idx = get_irn_idx(node);
 287                 if (idx >= lenv->n_entries) {
 288                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 289                         int old = lenv->n_entries;
 290                         int n_idx = idx + (idx >> 3);
 291
 292                         ARR_RESIZE(node_entry_t *, lenv->entries, n_idx);
 293                         memset(&lenv->entries[old], 0, (n_idx - old) * sizeof(lenv->entries[0]));
 294                         lenv->n_entries = n_idx;
 295                 }
 296                 lenv->entries[idx] = link;
 297                 lenv->flags |= MUST_BE_LOWERED;
 298         } else if (is_Conv(node)) {
 299                 /* Conv nodes have two modes */
 300                 ir_node *pred = get_Conv_op(node);
 301                 mode = get_irn_mode(pred);
 302
 303                 if (mode == lenv->params->high_signed ||
 304                         mode == lenv->params->high_unsigned) {
 305                         /* must lower this node either but don't need a link */
 306                         lenv->flags |= MUST_BE_LOWERED;
 307                 }  /* if */
 308                 return;
 309         }  /* if */
 310
 311         if (is_Proj(node)) {
 312                 /* link all Proj nodes to its predecessor:
 313                    Note that Tuple Proj's and its Projs are linked either. */
 314                 ir_node *pred = get_Proj_pred(node);
 315
 316                 set_irn_link(node, get_irn_link(pred));
 317                 set_irn_link(pred, node);
 318         } else if (is_Phi(node)) {
 319                 /* link all Phi nodes to its block */
 320                 ir_node *block = get_nodes_block(node);
 321                 add_Block_phi(block, node);
 322         } else if (is_Block(node)) {
 323                 /* fill the Proj -> Block map */
 324                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 325                         ir_node *pred = get_Block_cfgpred(node, i);
 326
 327                         if (is_Proj(pred))
 328                                 pmap_insert(lenv->proj_2_block, pred, node);
 329                 }  /* for */
 330         }  /* if */
 331 }  /* prepare_links */
 332
 333 /**
 334  * Translate a Constant: create two.
 335  */
 336 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env) {
 337         tarval   *tv, *tv_l, *tv_h;
 338         ir_node  *low, *high;
 339         dbg_info *dbg = get_irn_dbg_info(node);
 340         int      idx;
 341         ir_graph *irg = current_ir_graph;
 342         ir_mode  *low_mode = env->params->low_unsigned;
 343
 344         tv   = get_Const_tarval(node);
 345
 346         tv_l = tarval_convert_to(tv, low_mode);
 347         low  = new_rd_Const(dbg, irg, tv_l);
 348
 349         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 350         high = new_rd_Const(dbg, irg, tv_h);
 351
 352         idx = get_irn_idx(node);
 353         assert(idx < env->n_entries);
 354         env->entries[idx]->low_word  = low;
 355         env->entries[idx]->high_word = high;
 356 }  /* lower_Const */
 357
 358 /**
 359  * Translate a Load: create two.
 360  */
 361 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env) {
 362         ir_mode    *low_mode = env->params->low_unsigned;
 363         ir_graph   *irg = current_ir_graph;
 364         ir_node    *adr = get_Load_ptr(node);
 365         ir_node    *mem = get_Load_mem(node);
 366         ir_node    *low, *high, *proj;
 367         dbg_info   *dbg;
 368         ir_node    *block = get_nodes_block(node);
 369         int         idx;
 370         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 371                                  ? cons_volatile : 0;
 372
 373         if (env->params->little_endian) {
 374                 low  = adr;
 375                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 376         } else {
 377                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 378                 high = adr;
 379         }  /* if */
 380
 381         /* create two loads */
 382         dbg  = get_irn_dbg_info(node);
 383         low  = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 384         proj = new_r_Proj(block, low, mode_M, pn_Load_M);
 385         high = new_rd_Load(dbg, block, proj, high, mode, volatility);
 386
 387         idx = get_irn_idx(node);
 388         assert(idx < env->n_entries);
 389         env->entries[idx]->low_word  = low;
 390         env->entries[idx]->high_word = high;
 391
 392         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 393                 idx = get_irn_idx(proj);
 394
 395                 switch (get_Proj_proj(proj)) {
 396                 case pn_Load_M:         /* Memory result. */
 397                         /* put it to the second one */
 398                         set_Proj_pred(proj, high);
 399                         break;
 400                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 401                         /* put it to the first one */
 402                         set_Proj_pred(proj, low);
 403                         break;
 404                 case pn_Load_res:       /* Result of load operation. */
 405                         assert(idx < env->n_entries);
 406                         env->entries[idx]->low_word  = new_r_Proj(block, low,  low_mode, pn_Load_res);
 407                         env->entries[idx]->high_word = new_r_Proj(block, high, mode,     pn_Load_res);
 408                         break;
 409                 default:
 410                         assert(0 && "unexpected Proj number");
 411                 }  /* switch */
 412                 /* mark this proj: we have handled it already, otherwise we might fall into
 413                  * out new nodes. */
 414                 mark_irn_visited(proj);
 415         }  /* for */
 416 }  /* lower_Load */
 417
 418 /**
 419  * Translate a Store: create two.
 420  */
 421 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env) {
 422         ir_graph     *irg;
 423         ir_node      *block, *adr, *mem;
 424         ir_node      *low, *high, *irn, *proj;
 425         dbg_info     *dbg;
 426         int           idx;
 427         node_entry_t *entry;
 428         ir_cons_flags    volatility = get_Store_volatility(node) == volatility_is_volatile
 429                                    ? cons_volatile : 0;
 430         (void) mode;
 431
 432         irn = get_Store_value(node);
 433         entry = env->entries[get_irn_idx(irn)];
 434         assert(entry);
 435
 436         if (! entry->low_word) {
 437                 /* not ready yet, wait */
 438                 pdeq_putr(env->waitq, node);
 439                 return;
 440         }  /* if */
 441
 442         irg = current_ir_graph;
 443         adr = get_Store_ptr(node);
 444         mem = get_Store_mem(node);
 445         block = get_nodes_block(node);
 446
 447         if (env->params->little_endian) {
 448                 low  = adr;
 449                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 450         } else {
 451                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 452                 high = adr;
 453         }  /* if */
 454
 455         /* create two Stores */
 456         dbg = get_irn_dbg_info(node);
 457         low  = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 458         proj = new_r_Proj(block, low, mode_M, pn_Store_M);
 459         high = new_rd_Store(dbg, block, proj, high, entry->high_word, volatility);
 460
 461         idx = get_irn_idx(node);
 462         assert(idx < env->n_entries);
 463         env->entries[idx]->low_word  = low;
 464         env->entries[idx]->high_word = high;
 465
 466         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 467                 idx = get_irn_idx(proj);
 468
 469                 switch (get_Proj_proj(proj)) {
 470                 case pn_Store_M:         /* Memory result. */
 471                         /* put it to the second one */
 472                         set_Proj_pred(proj, high);
 473                         break;
 474                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 475                         /* put it to the first one */
 476                         set_Proj_pred(proj, low);
 477                         break;
 478                 default:
 479                         assert(0 && "unexpected Proj number");
 480                 }  /* switch */
 481                 /* mark this proj: we have handled it already, otherwise we might fall into
 482                  * out new nodes. */
 483                 mark_irn_visited(proj);
 484         }  /* for */
 485 }  /* lower_Store */
 486
 487 /**
 488  * Return a node containing the address of the intrinsic emulation function.
 489  *
 490  * @param method  the method type of the emulation function
 491  * @param op      the emulated ir_op
 492  * @param imode   the input mode of the emulated opcode
 493  * @param omode   the output mode of the emulated opcode
 494  * @param env     the lower environment
 495  */
 496 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 497                                       ir_mode *imode, ir_mode *omode,
 498                                       lower_env_t *env) {
 499         symconst_symbol sym;
 500         ir_entity *ent;
 501         op_mode_entry_t key, *entry;
 502
 503         key.op    = op;
 504         key.imode = imode;
 505         key.omode = omode;
 506         key.ent   = NULL;
 507
 508         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 509                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 510         if (! entry->ent) {
 511                 /* create a new one */
 512                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 513
 514                 assert(ent && "Intrinsic creator must return an entity");
 515                 entry->ent = ent;
 516         } else {
 517                 ent = entry->ent;
 518         }  /* if */
 519         sym.entity_p = ent;
 520         return new_r_SymConst(current_ir_graph, mode_P_code, sym, symconst_addr_ent);
 521 }  /* get_intrinsic_address */
 522
 523 /**
 524  * Translate a Div.
 525  *
 526  * Create an intrinsic Call.
 527  */
 528 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env) {
 529         ir_node  *block, *irn, *call, *proj;
 530         ir_node  *in[4];
 531         ir_mode  *opmode;
 532         dbg_info *dbg;
 533         ir_type  *mtp;
 534         int      idx;
 535         node_entry_t *entry;
 536
 537         irn   = get_Div_left(node);
 538         entry = env->entries[get_irn_idx(irn)];
 539         assert(entry);
 540
 541         if (! entry->low_word) {
 542                 /* not ready yet, wait */
 543                 pdeq_putr(env->waitq, node);
 544                 return;
 545         }  /* if */
 546
 547         in[0] = entry->low_word;
 548         in[1] = entry->high_word;
 549
 550         irn   = get_Div_right(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[2] = entry->low_word;
 561         in[3] = entry->high_word;
 562
 563         dbg   = get_irn_dbg_info(node);
 564         block = get_nodes_block(node);
 565
 566         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 567         opmode = get_irn_op_mode(node);
 568         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 569         call = new_rd_Call(dbg, block, get_Div_mem(node), irn, 4, in, mtp);
 570         set_irn_pinned(call, get_irn_pinned(node));
 571         irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
 572
 573         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 574                 switch (get_Proj_proj(proj)) {
 575                 case pn_Div_M:         /* Memory result. */
 576                         /* reroute to the call */
 577                         set_Proj_pred(proj, call);
 578                         set_Proj_proj(proj, pn_Call_M_except);
 579                         break;
 580                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 581                         /* reroute to the call */
 582                         set_Proj_pred(proj, call);
 583                         set_Proj_proj(proj, pn_Call_X_except);
 584                         break;
 585                 case pn_Div_res:       /* Result of computation. */
 586                         idx = get_irn_idx(proj);
 587                         assert(idx < env->n_entries);
 588                         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 589                         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 590                         break;
 591                 default:
 592                         assert(0 && "unexpected Proj number");
 593                 }  /* switch */
 594                 /* mark this proj: we have handled it already, otherwise we might fall into
 595                  * out new nodes. */
 596                 mark_irn_visited(proj);
 597         }  /* for */
 598 }  /* lower_Div */
 599
 600 /**
 601  * Translate a Mod.
 602  *
 603  * Create an intrinsic Call.
 604  */
 605 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 606         ir_node  *block, *proj, *irn, *call;
 607         ir_node  *in[4];
 608         ir_mode  *opmode;
 609         dbg_info *dbg;
 610         ir_type  *mtp;
 611         int      idx;
 612         node_entry_t *entry;
 613
 614         irn   = get_Mod_left(node);
 615         entry = env->entries[get_irn_idx(irn)];
 616         assert(entry);
 617
 618         if (! entry->low_word) {
 619                 /* not ready yet, wait */
 620                 pdeq_putr(env->waitq, node);
 621                 return;
 622         }  /* if */
 623
 624         in[0] = entry->low_word;
 625         in[1] = entry->high_word;
 626
 627         irn   = get_Mod_right(node);
 628         entry = env->entries[get_irn_idx(irn)];
 629         assert(entry);
 630
 631         if (! entry->low_word) {
 632                 /* not ready yet, wait */
 633                 pdeq_putr(env->waitq, node);
 634                 return;
 635         }  /* if */
 636
 637         in[2] = entry->low_word;
 638         in[3] = entry->high_word;
 639
 640         dbg   = get_irn_dbg_info(node);
 641         block = get_nodes_block(node);
 642
 643         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 644         opmode = get_irn_op_mode(node);
 645         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 646         call = new_rd_Call(dbg, block, get_Mod_mem(node), irn, 4, in, mtp);
 647         set_irn_pinned(call, get_irn_pinned(node));
 648         irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
 649
 650         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 651                 switch (get_Proj_proj(proj)) {
 652                 case pn_Mod_M:         /* Memory result. */
 653                         /* reroute to the call */
 654                         set_Proj_pred(proj, call);
 655                         set_Proj_proj(proj, pn_Call_M_except);
 656                         break;
 657                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 658                         /* reroute to the call */
 659                         set_Proj_pred(proj, call);
 660                         set_Proj_proj(proj, pn_Call_X_except);
 661                         break;
 662                 case pn_Mod_res:       /* Result of computation. */
 663                         idx = get_irn_idx(proj);
 664                         assert(idx < env->n_entries);
 665                         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 666                         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 667                         break;
 668                 default:
 669                         assert(0 && "unexpected Proj number");
 670                 }  /* switch */
 671                 /* mark this proj: we have handled it already, otherwise we might fall into
 672                  * out new nodes. */
 673                 mark_irn_visited(proj);
 674         }  /* for */
 675 }  /* lower_Mod */
 676
 677 /**
 678  * Translate a DivMod.
 679  *
 680  * Create two intrinsic Calls.
 681  */
 682 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 683         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod;
 684         ir_node  *resDiv = NULL;
 685         ir_node  *resMod = NULL;
 686         ir_node  *in[4];
 687         ir_mode  *opmode;
 688         dbg_info *dbg;
 689         ir_type  *mtp;
 690         int      idx;
 691         node_entry_t *entry;
 692         unsigned flags = 0;
 693
 694         /* check if both results are needed */
 695         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 696                 switch (get_Proj_proj(proj)) {
 697                 case pn_DivMod_res_div: flags |= 1; break;
 698                 case pn_DivMod_res_mod: flags |= 2; break;
 699                 default: break;
 700                 }  /* switch */
 701         }  /* for */
 702
 703         irn   = get_DivMod_left(node);
 704         entry = env->entries[get_irn_idx(irn)];
 705         assert(entry);
 706
 707         if (! entry->low_word) {
 708                 /* not ready yet, wait */
 709                 pdeq_putr(env->waitq, node);
 710                 return;
 711         }  /* if */
 712
 713         in[0] = entry->low_word;
 714         in[1] = entry->high_word;
 715
 716         irn   = get_DivMod_right(node);
 717         entry = env->entries[get_irn_idx(irn)];
 718         assert(entry);
 719
 720         if (! entry->low_word) {
 721                 /* not ready yet, wait */
 722                 pdeq_putr(env->waitq, node);
 723                 return;
 724         }  /* if */
 725
 726         in[2] = entry->low_word;
 727         in[3] = entry->high_word;
 728
 729         dbg   = get_irn_dbg_info(node);
 730         block = get_nodes_block(node);
 731
 732         mem = get_DivMod_mem(node);
 733
 734         callDiv = callMod = NULL;
 735         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 736         if (flags & 1) {
 737                 opmode = get_irn_op_mode(node);
 738                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, env);
 739                 callDiv = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 740                 set_irn_pinned(callDiv, get_irn_pinned(node));
 741                 resDiv = new_r_Proj(block, callDiv, mode_T, pn_Call_T_result);
 742         }  /* if */
 743         if (flags & 2) {
 744                 if (flags & 1)
 745                         mem = new_r_Proj(block, callDiv, mode_M, pn_Call_M);
 746                 opmode = get_irn_op_mode(node);
 747                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, env);
 748                 callMod = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 749                 set_irn_pinned(callMod, get_irn_pinned(node));
 750                 resMod = new_r_Proj(block, callMod, mode_T, pn_Call_T_result);
 751         }  /* if */
 752
 753         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 754                 switch (get_Proj_proj(proj)) {
 755                 case pn_DivMod_M:         /* Memory result. */
 756                         /* reroute to the first call */
 757                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 758                         set_Proj_proj(proj, pn_Call_M_except);
 759                         break;
 760                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 761                         /* reroute to the first call */
 762                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 763                         set_Proj_proj(proj, pn_Call_X_except);
 764                         break;
 765                 case pn_DivMod_res_div:   /* Result of Div. */
 766                         idx = get_irn_idx(proj);
 767                         assert(idx < env->n_entries);
 768                         env->entries[idx]->low_word  = new_r_Proj(block, resDiv, env->params->low_unsigned, 0);
 769                         env->entries[idx]->high_word = new_r_Proj(block, resDiv, mode,                      1);
 770                         break;
 771                 case pn_DivMod_res_mod:   /* Result of Mod. */
 772                         idx = get_irn_idx(proj);
 773                         env->entries[idx]->low_word  = new_r_Proj(block, resMod, env->params->low_unsigned, 0);
 774                         env->entries[idx]->high_word = new_r_Proj(block, resMod, mode,                      1);
 775                         break;
 776                 default:
 777                         assert(0 && "unexpected Proj number");
 778                 }  /* switch */
 779                 /* mark this proj: we have handled it already, otherwise we might fall into
 780                  * out new nodes. */
 781                 mark_irn_visited(proj);
 782         }  /* for */
 783 }  /* lower_DivMod */
 784
 785 /**
 786  * Translate a Binop.
 787  *
 788  * Create an intrinsic Call.
 789  */
 790 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 791         ir_node  *block, *irn;
 792         ir_node  *in[4];
 793         dbg_info *dbg;
 794         ir_type  *mtp;
 795         int      idx;
 796         ir_graph *irg;
 797         node_entry_t *entry;
 798
 799         irn   = get_binop_left(node);
 800         entry = env->entries[get_irn_idx(irn)];
 801         assert(entry);
 802
 803         if (! entry->low_word) {
 804                 /* not ready yet, wait */
 805                 pdeq_putr(env->waitq, node);
 806                 return;
 807         }  /* if */
 808
 809         in[0] = entry->low_word;
 810         in[1] = entry->high_word;
 811
 812         irn   = get_binop_right(node);
 813         entry = env->entries[get_irn_idx(irn)];
 814         assert(entry);
 815
 816         if (! entry->low_word) {
 817                 /* not ready yet, wait */
 818                 pdeq_putr(env->waitq, node);
 819                 return;
 820         }  /* if */
 821
 822         in[2] = entry->low_word;
 823         in[3] = entry->high_word;
 824
 825         dbg   = get_irn_dbg_info(node);
 826         block = get_nodes_block(node);
 827         irg   = current_ir_graph;
 828
 829         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 830         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 831         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 832                 irn, 4, in, mtp);
 833         set_irn_pinned(irn, get_irn_pinned(node));
 834         irn = new_r_Proj(block, irn, mode_T, pn_Call_T_result);
 835
 836         idx = get_irn_idx(node);
 837         assert(idx < env->n_entries);
 838         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 839         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 840 }  /* lower_Binop */
 841
 842 /**
 843  * Translate a Shiftop.
 844  *
 845  * Create an intrinsic Call.
 846  */
 847 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 848         ir_node  *block, *irn;
 849         ir_node  *in[3];
 850         dbg_info *dbg;
 851         ir_type  *mtp;
 852         int      idx;
 853         ir_graph *irg;
 854         node_entry_t *entry;
 855
 856         irn   = get_binop_left(node);
 857         entry = env->entries[get_irn_idx(irn)];
 858         assert(entry);
 859
 860         if (! entry->low_word) {
 861                 /* not ready yet, wait */
 862                 pdeq_putr(env->waitq, node);
 863                 return;
 864         }  /* if */
 865
 866         in[0] = entry->low_word;
 867         in[1] = entry->high_word;
 868
 869         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 870         in[2] = get_binop_right(node);
 871
 872         dbg   = get_irn_dbg_info(node);
 873         block = get_nodes_block(node);
 874         irg  = current_ir_graph;
 875
 876         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 877         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 878         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 879                 irn, 3, in, mtp);
 880         set_irn_pinned(irn, get_irn_pinned(node));
 881         irn = new_r_Proj(block, irn, mode_T, pn_Call_T_result);
 882
 883         idx = get_irn_idx(node);
 884         assert(idx < env->n_entries);
 885         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 886         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 887 }  /* lower_Shiftop */
 888
 889 /**
 890  * Translate a Shr and handle special cases.
 891  */
 892 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env) {
 893         ir_node  *right = get_Shr_right(node);
 894         ir_graph *irg = current_ir_graph;
 895
 896         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 897                 tarval *tv = get_Const_tarval(right);
 898
 899                 if (tarval_is_long(tv) &&
 900                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 901                         ir_node *block = get_nodes_block(node);
 902                         ir_node *left = get_Shr_left(node);
 903                         ir_node *c;
 904                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 905                         int idx = get_irn_idx(left);
 906
 907                         left = env->entries[idx]->high_word;
 908                         idx = get_irn_idx(node);
 909
 910                         if (shf_cnt > 0) {
 911                                 c = new_r_Const_long(irg, env->params->low_unsigned, shf_cnt);
 912                                 env->entries[idx]->low_word = new_r_Shr(block, left, c, mode);
 913                         } else {
 914                                 env->entries[idx]->low_word = left;
 915                         }  /* if */
 916                         env->entries[idx]->high_word = new_r_Const(irg, get_mode_null(mode));
 917
 918                         return;
 919                 }  /* if */
 920         }  /* if */
 921         lower_Shiftop(node, mode, env);
 922 }  /* lower_Shr */
 923
 924 /**
 925  * Translate a Shl and handle special cases.
 926  */
 927 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env) {
 928         ir_node  *right = get_Shl_right(node);
 929         ir_graph *irg = current_ir_graph;
 930
 931         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 932                 tarval *tv = get_Const_tarval(right);
 933
 934                 if (tarval_is_long(tv) &&
 935                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 936                         ir_mode *mode_l;
 937                         ir_node *block = get_nodes_block(node);
 938                         ir_node *left = get_Shl_left(node);
 939                         ir_node *c;
 940                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 941                         int idx = get_irn_idx(left);
 942
 943                         left = new_r_Conv(block, env->entries[idx]->low_word, mode);
 944                         idx = get_irn_idx(node);
 945
 946                         mode_l = env->params->low_unsigned;
 947                         if (shf_cnt > 0) {
 948                                 c = new_r_Const_long(irg, mode_l, shf_cnt);
 949                                 env->entries[idx]->high_word = new_r_Shl(block, left, c, mode);
 950                         } else {
 951                                 env->entries[idx]->high_word = left;
 952                         }  /* if */
 953                         env->entries[idx]->low_word  = new_r_Const(irg, get_mode_null(mode_l));
 954
 955                         return;
 956                 }  /* if */
 957         }  /* if */
 958         lower_Shiftop(node, mode, env);
 959 }  /* lower_Shl */
 960
 961 /**
 962  * Translate a Shrs and handle special cases.
 963  */
 964 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env) {
 965         ir_node  *right = get_Shrs_right(node);
 966         ir_graph *irg = current_ir_graph;
 967
 968         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 969                 tarval *tv = get_Const_tarval(right);
 970
 971                 if (tarval_is_long(tv) &&
 972                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 973                         ir_node *block   = get_nodes_block(node);
 974                         ir_node *left    = get_Shrs_left(node);
 975                         long     shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 976                         int      idx     = get_irn_idx(left);
 977                         ir_mode *mode_l;
 978                         ir_node *low;
 979                         ir_node *c;
 980
 981                         left = env->entries[idx]->high_word;
 982                         idx = get_irn_idx(node);
 983
 984                         mode_l = env->params->low_unsigned;
 985                         if (shf_cnt > 0) {
 986                                 c   = new_r_Const_long(irg, mode_l, shf_cnt);
 987                                 low = new_r_Shrs(block, left, c, mode);
 988                         } else {
 989                                 low = left;
 990                         }  /* if */
 991                         /* low word is expected to have mode_l */
 992                         env->entries[idx]->low_word = new_r_Conv(block, low, mode_l);
 993
 994                         c = new_r_Const_long(irg, mode_l, get_mode_size_bits(mode) - 1);
 995                         env->entries[idx]->high_word = new_r_Shrs(block, left, c, mode);
 996
 997                         return;
 998                 }  /* if */
 999         }  /* if */
1000         lower_Shiftop(node, mode, env);
1001 }  /* lower_Shrs */
1002
1003 /**
1004  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1005  */
1006 static void prepare_links_and_handle_rotl(ir_node *node, void *env) {
1007         lower_env_t *lenv = env;
1008
1009         if (is_Rotl(node)) {
1010                 ir_mode *mode = get_irn_op_mode(node);
1011                         if (mode == lenv->params->high_signed ||
1012                             mode == lenv->params->high_unsigned) {
1013                                 ir_node  *right = get_Rotl_right(node);
1014                                 ir_node  *left, *shl, *shr, *or, *block, *sub, *c;
1015                                 ir_mode  *omode, *rmode;
1016                                 dbg_info *dbg;
1017                                 optimization_state_t state;
1018
1019                                 if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1020                                         tarval *tv = get_Const_tarval(right);
1021
1022                                         if (tarval_is_long(tv) &&
1023                                             get_tarval_long(tv) == (long)get_mode_size_bits(mode)) {
1024                                                 /* will be optimized in lower_Rotl() */
1025                                                 return;
1026                                         }
1027                                 }
1028
1029                                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) and lower those */
1030                                 dbg   = get_irn_dbg_info(node);
1031                                 omode = get_irn_mode(node);
1032                                 left  = get_Rotl_left(node);
1033                                 block = get_nodes_block(node);
1034                                 shl   = new_rd_Shl(dbg, block, left, right, omode);
1035                                 rmode = get_irn_mode(right);
1036                                 c     = new_Const_long(rmode, get_mode_size_bits(omode));
1037                                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
1038                                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
1039
1040                                 /* optimization must be switched off here, or we will get the Rotl back */
1041                                 save_optimization_state(&state);
1042                                 set_opt_algebraic_simplification(0);
1043                                 or = new_rd_Or(dbg, block, shl, shr, omode);
1044                                 restore_optimization_state(&state);
1045
1046                                 exchange(node, or);
1047
1048                                 /* do lowering on the new nodes */
1049                                 prepare_links(shl, env);
1050                                 prepare_links(c, env);
1051                                 prepare_links(sub, env);
1052                                 prepare_links(shr, env);
1053                                 prepare_links(or, env);
1054                         }
1055         } else {
1056                 prepare_links(node, env);
1057         }
1058 }
1059
1060 /**
1061  * Translate a special case Rotl(x, sizeof(w)).
1062  */
1063 static void lower_Rotl(ir_node *node, ir_mode *mode, lower_env_t *env) {
1064         ir_node *right = get_Rotl_right(node);
1065         ir_node *left = get_Rotl_left(node);
1066         ir_node *h, *l;
1067         int idx = get_irn_idx(left);
1068         (void) right;
1069         (void) mode;
1070
1071         assert(get_mode_arithmetic(mode) == irma_twos_complement &&
1072                is_Const(right) && tarval_is_long(get_Const_tarval(right)) &&
1073                get_tarval_long(get_Const_tarval(right)) == (long)get_mode_size_bits(mode));
1074
1075         l = env->entries[idx]->low_word;
1076         h = env->entries[idx]->high_word;
1077         idx = get_irn_idx(node);
1078
1079         env->entries[idx]->low_word  = h;
1080         env->entries[idx]->high_word = l;
1081 }  /* lower_Rotl */
1082
1083 /**
1084  * Translate an Unop.
1085  *
1086  * Create an intrinsic Call.
1087  */
1088 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env) {
1089         ir_node  *block, *irn;
1090         ir_node  *in[2];
1091         dbg_info *dbg;
1092         ir_type  *mtp;
1093         int      idx;
1094         node_entry_t *entry;
1095
1096         irn   = get_unop_op(node);
1097         entry = env->entries[get_irn_idx(irn)];
1098         assert(entry);
1099
1100         if (! entry->low_word) {
1101                 /* not ready yet, wait */
1102                 pdeq_putr(env->waitq, node);
1103                 return;
1104         }  /* if */
1105
1106         in[0] = entry->low_word;
1107         in[1] = entry->high_word;
1108
1109         dbg   = get_irn_dbg_info(node);
1110         block = get_nodes_block(node);
1111
1112         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1113         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
1114         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
1115                 irn, 2, in, mtp);
1116         set_irn_pinned(irn, get_irn_pinned(node));
1117         irn = new_r_Proj(block, irn, mode_T, pn_Call_T_result);
1118
1119         idx = get_irn_idx(node);
1120         assert(idx < env->n_entries);
1121         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
1122         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
1123 }  /* lower_Unop */
1124
1125 /**
1126  * Translate a logical Binop.
1127  *
1128  * Create two logical Binops.
1129  */
1130 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1131                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1132         ir_node  *block, *irn;
1133         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1134         dbg_info *dbg;
1135         int      idx;
1136         ir_graph *irg;
1137         node_entry_t *entry;
1138
1139         irn   = get_binop_left(node);
1140         entry = env->entries[get_irn_idx(irn)];
1141         assert(entry);
1142
1143         if (! entry->low_word) {
1144                 /* not ready yet, wait */
1145                 pdeq_putr(env->waitq, node);
1146                 return;
1147         }  /* if */
1148
1149         lop_l = entry->low_word;
1150         lop_h = entry->high_word;
1151
1152         irn   = get_binop_right(node);
1153         entry = env->entries[get_irn_idx(irn)];
1154         assert(entry);
1155
1156         if (! entry->low_word) {
1157                 /* not ready yet, wait */
1158                 pdeq_putr(env->waitq, node);
1159                 return;
1160         }  /* if */
1161
1162         rop_l = entry->low_word;
1163         rop_h = entry->high_word;
1164
1165         dbg = get_irn_dbg_info(node);
1166         block = get_nodes_block(node);
1167
1168         idx = get_irn_idx(node);
1169         assert(idx < env->n_entries);
1170         irg = current_ir_graph;
1171         env->entries[idx]->low_word  = constr_rd(dbg, block, lop_l, rop_l, env->params->low_unsigned);
1172         env->entries[idx]->high_word = constr_rd(dbg, block, lop_h, rop_h, mode);
1173 }  /* lower_Binop_logical */
1174
1175 /** create a logical operation transformation */
1176 #define lower_logical(op)                                                \
1177 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1178         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1179 }
1180
1181 lower_logical(And)
1182 lower_logical(Or)
1183 lower_logical(Eor)
1184
1185 /**
1186  * Translate a Not.
1187  *
1188  * Create two logical Nots.
1189  */
1190 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env) {
1191         ir_node  *block, *irn;
1192         ir_node  *op_l, *op_h;
1193         dbg_info *dbg;
1194         int      idx;
1195         node_entry_t *entry;
1196
1197         irn   = get_Not_op(node);
1198         entry = env->entries[get_irn_idx(irn)];
1199         assert(entry);
1200
1201         if (! entry->low_word) {
1202                 /* not ready yet, wait */
1203                 pdeq_putr(env->waitq, node);
1204                 return;
1205         }  /* if */
1206
1207         op_l = entry->low_word;
1208         op_h = entry->high_word;
1209
1210         dbg   = get_irn_dbg_info(node);
1211         block = get_nodes_block(node);
1212
1213         idx = get_irn_idx(node);
1214         assert(idx < env->n_entries);
1215         env->entries[idx]->low_word  = new_rd_Not(dbg, block, op_l, env->params->low_unsigned);
1216         env->entries[idx]->high_word = new_rd_Not(dbg, block, op_h, mode);
1217 }  /* lower_Not */
1218
1219 /**
1220  * Translate a Cond.
1221  */
1222 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
1223         ir_node *cmp, *left, *right, *block;
1224         ir_node *sel = get_Cond_selector(node);
1225         ir_mode *m = get_irn_mode(sel);
1226         int     idx;
1227         (void) mode;
1228
1229         if (m == mode_b) {
1230                 node_entry_t *lentry, *rentry;
1231                 ir_node  *proj, *projT = NULL, *projF = NULL;
1232                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1233                 ir_node  *projHF, *projHT;
1234                 ir_node  *dst_blk;
1235                 pn_Cmp   pnc;
1236                 ir_graph *irg;
1237                 dbg_info *dbg;
1238
1239                 if(!is_Proj(sel))
1240                         return;
1241
1242                 cmp   = get_Proj_pred(sel);
1243                 if(!is_Cmp(cmp))
1244                         return;
1245
1246                 left  = get_Cmp_left(cmp);
1247                 idx   = get_irn_idx(left);
1248                 lentry = env->entries[idx];
1249
1250                 if (! lentry) {
1251                         /* a normal Cmp */
1252                         return;
1253                 }  /* if */
1254
1255                 right = get_Cmp_right(cmp);
1256                 idx   = get_irn_idx(right);
1257                 rentry = env->entries[idx];
1258                 assert(rentry);
1259
1260                 if (! lentry->low_word || !rentry->low_word) {
1261                         /* not yet ready */
1262                         pdeq_putr(env->waitq, node);
1263                         return;
1264                 }  /* if */
1265
1266                 /* all right, build the code */
1267                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1268                         long proj_nr = get_Proj_proj(proj);
1269
1270                         if (proj_nr == pn_Cond_true) {
1271                                 assert(projT == NULL && "more than one Proj(true)");
1272                                 projT = proj;
1273                         } else {
1274                                 assert(proj_nr == pn_Cond_false);
1275                                 assert(projF == NULL && "more than one Proj(false)");
1276                                 projF = proj;
1277                         }  /* if */
1278                         mark_irn_visited(proj);
1279                 }  /* for */
1280                 assert(projT && projF);
1281
1282                 /* create a new high compare */
1283                 block = get_nodes_block(node);
1284                 irg   = get_Block_irg(block);
1285                 dbg   = get_irn_dbg_info(cmp);
1286                 pnc   = get_Proj_proj(sel);
1287
1288                 if (is_Const(right) && is_Const_null(right)) {
1289                         if (pnc == pn_Cmp_Eq || pnc == pn_Cmp_Lg) {
1290                                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1291                                 ir_mode *mode = env->params->low_unsigned;
1292                                 ir_node *low  = new_r_Conv(block, lentry->low_word, mode);
1293                                 ir_node *high = new_r_Conv(block, lentry->high_word, mode);
1294                                 ir_node *or   = new_rd_Or(dbg, block, low, high, mode);
1295                                 ir_node *cmp  = new_rd_Cmp(dbg, block, or, new_Const_long(mode, 0));
1296
1297                                 ir_node *proj = new_r_Proj(block, cmp, mode_b, pnc);
1298                                 set_Cond_selector(node, proj);
1299                                 return;
1300                         }
1301                 }
1302
1303                 cmpH = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word);
1304
1305                 if (pnc == pn_Cmp_Eq) {
1306                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1307                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1308
1309                         assert(entry);
1310                         dst_blk = entry->value;
1311
1312                         irn = new_r_Proj(block, cmpH, mode_b, pn_Cmp_Eq);
1313                         dbg = get_irn_dbg_info(node);
1314                         irn = new_rd_Cond(dbg, block, irn);
1315
1316                         projHF = new_r_Proj(block, irn, mode_X, pn_Cond_false);
1317                         mark_irn_visited(projHF);
1318                         exchange(projF, projHF);
1319
1320                         projHT = new_r_Proj(block, irn, mode_X, pn_Cond_true);
1321                         mark_irn_visited(projHT);
1322
1323                         new_bl = new_r_Block(irg, 1, &projHT);
1324
1325                         dbg   = get_irn_dbg_info(cmp);
1326                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1327                         irn = new_r_Proj(new_bl, cmpL, mode_b, pn_Cmp_Eq);
1328                         dbg = get_irn_dbg_info(node);
1329                         irn = new_rd_Cond(dbg, new_bl, irn);
1330
1331                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_false);
1332                         mark_irn_visited(proj);
1333                         add_block_cf_input(dst_blk, projHF, proj);
1334
1335                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_true);
1336                         mark_irn_visited(proj);
1337                         exchange(projT, proj);
1338                 } else if (pnc == pn_Cmp_Lg) {
1339                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1340                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1341
1342                         assert(entry);
1343                         dst_blk = entry->value;
1344
1345                         irn = new_r_Proj(block, cmpH, mode_b, pn_Cmp_Lg);
1346                         dbg = get_irn_dbg_info(node);
1347                         irn = new_rd_Cond(dbg, block, irn);
1348
1349                         projHT = new_r_Proj(block, irn, mode_X, pn_Cond_true);
1350                         mark_irn_visited(projHT);
1351                         exchange(projT, projHT);
1352
1353                         projHF = new_r_Proj(block, irn, mode_X, pn_Cond_false);
1354                         mark_irn_visited(projHF);
1355
1356                         new_bl = new_r_Block(irg, 1, &projHF);
1357
1358                         dbg   = get_irn_dbg_info(cmp);
1359                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1360                         irn = new_r_Proj(new_bl, cmpL, mode_b, pn_Cmp_Lg);
1361                         dbg = get_irn_dbg_info(node);
1362                         irn = new_rd_Cond(dbg, new_bl, irn);
1363
1364                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_true);
1365                         mark_irn_visited(proj);
1366                         add_block_cf_input(dst_blk, projHT, proj);
1367
1368                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_false);
1369                         mark_irn_visited(proj);
1370                         exchange(projF, proj);
1371                 } else {
1372                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1373                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1374                         pmap_entry *entry;
1375
1376                         entry = pmap_find(env->proj_2_block, projT);
1377                         assert(entry);
1378                         dstT = entry->value;
1379
1380                         entry = pmap_find(env->proj_2_block, projF);
1381                         assert(entry);
1382                         dstF = entry->value;
1383
1384                         irn = new_r_Proj(block, cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1385                         dbg = get_irn_dbg_info(node);
1386                         irn = new_rd_Cond(dbg, block, irn);
1387
1388                         projHT = new_r_Proj(block, irn, mode_X, pn_Cond_true);
1389                         mark_irn_visited(projHT);
1390                         exchange(projT, projHT);
1391                         projT = projHT;
1392
1393                         projHF = new_r_Proj(block, irn, mode_X, pn_Cond_false);
1394                         mark_irn_visited(projHF);
1395
1396                         newbl_eq = new_r_Block(irg, 1, &projHF);
1397
1398                         irn = new_r_Proj(block, cmpH, mode_b, pn_Cmp_Eq);
1399                         irn = new_rd_Cond(dbg, newbl_eq, irn);
1400
1401                         proj = new_r_Proj(newbl_eq, irn, mode_X, pn_Cond_false);
1402                         mark_irn_visited(proj);
1403                         exchange(projF, proj);
1404                         projF = proj;
1405
1406                         proj = new_r_Proj(newbl_eq, irn, mode_X, pn_Cond_true);
1407                         mark_irn_visited(proj);
1408
1409                         newbl_l = new_r_Block(irg, 1, &proj);
1410
1411                         dbg   = get_irn_dbg_info(cmp);
1412                         cmpL = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word);
1413                         irn = new_r_Proj(newbl_l, cmpL, mode_b, pnc);
1414                         dbg = get_irn_dbg_info(node);
1415                         irn = new_rd_Cond(dbg, newbl_l, irn);
1416
1417                         proj = new_r_Proj(newbl_l, irn, mode_X, pn_Cond_true);
1418                         mark_irn_visited(proj);
1419                         add_block_cf_input(dstT, projT, proj);
1420
1421                         proj = new_r_Proj(newbl_l, irn, mode_X, pn_Cond_false);
1422                         mark_irn_visited(proj);
1423                         add_block_cf_input(dstF, projF, proj);
1424                 }  /* if */
1425
1426                 /* we have changed the control flow */
1427                 env->flags |= CF_CHANGED;
1428         } else {
1429                 idx = get_irn_idx(sel);
1430
1431                 if (env->entries[idx]) {
1432                         /*
1433                            Bad, a jump-table with double-word index.
1434                            This should not happen, but if it does we handle
1435                            it like a Conv were between (in other words, ignore
1436                            the high part.
1437                          */
1438
1439                         if (! env->entries[idx]->low_word) {
1440                                 /* not ready yet, wait */
1441                                 pdeq_putr(env->waitq, node);
1442                                 return;
1443                         }  /* if */
1444                         set_Cond_selector(node, env->entries[idx]->low_word);
1445                 }  /* if */
1446         }  /* if */
1447 }  /* lower_Cond */
1448
1449 /**
1450  * Translate a Conv to higher_signed
1451  */
1452 static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
1453         ir_node  *op    = get_Conv_op(node);
1454         ir_mode  *imode = get_irn_mode(op);
1455         ir_mode  *dst_mode_l = env->params->low_unsigned;
1456         ir_mode  *dst_mode_h = env->params->low_signed;
1457         int      idx = get_irn_idx(node);
1458         ir_graph *irg = current_ir_graph;
1459         ir_node  *block = get_nodes_block(node);
1460         dbg_info *dbg = get_irn_dbg_info(node);
1461
1462         assert(idx < env->n_entries);
1463
1464         if (mode_is_int(imode) || mode_is_reference(imode)) {
1465                 if (imode == env->params->high_unsigned) {
1466                         /* a Conv from Lu to Ls */
1467                         int op_idx = get_irn_idx(op);
1468
1469                         if (! env->entries[op_idx]->low_word) {
1470                                 /* not ready yet, wait */
1471                                 pdeq_putr(env->waitq, node);
1472                                 return;
1473                         }  /* if */
1474                         env->entries[idx]->low_word  = new_rd_Conv(dbg, block, env->entries[op_idx]->low_word,  dst_mode_l);
1475                         env->entries[idx]->high_word = new_rd_Conv(dbg, block, env->entries[op_idx]->high_word, dst_mode_h);
1476                 } else {
1477                         /* simple case: create a high word */
1478                         if (imode != dst_mode_l)
1479                                 op = new_rd_Conv(dbg, block, op, dst_mode_l);
1480
1481                         env->entries[idx]->low_word  = op;
1482
1483                         if (mode_is_signed(imode)) {
1484                                 ir_node *op_conv = new_rd_Conv(dbg, block, op, dst_mode_h);
1485                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, block, op_conv,
1486                                         new_Const_long(dst_mode_l, get_mode_size_bits(dst_mode_h) - 1), dst_mode_h);
1487                         } else {
1488                                 env->entries[idx]->high_word = new_Const(get_mode_null(dst_mode_h));
1489                         }  /* if */
1490                 }  /* if */
1491         } else {
1492                 ir_node *irn, *call;
1493                 ir_mode *omode = env->params->high_signed;
1494                 ir_type *mtp = get_conv_type(imode, omode, env);
1495
1496                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1497                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1498                 set_irn_pinned(call, get_irn_pinned(node));
1499                 irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
1500
1501                 env->entries[idx]->low_word  = new_r_Proj(block, irn, dst_mode_l, 0);
1502                 env->entries[idx]->high_word = new_r_Proj(block, irn, dst_mode_h, 1);
1503         }  /* if */
1504 }  /* lower_Conv_to_Ls */
1505
1506 /**
1507  * Translate a Conv to higher_unsigned
1508  */
1509 static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
1510         ir_node  *op    = get_Conv_op(node);
1511         ir_mode  *imode = get_irn_mode(op);
1512         ir_mode  *dst_mode = env->params->low_unsigned;
1513         int      idx = get_irn_idx(node);
1514         ir_graph *irg = current_ir_graph;
1515         ir_node  *block = get_nodes_block(node);
1516         dbg_info *dbg = get_irn_dbg_info(node);
1517
1518         assert(idx < env->n_entries);
1519
1520         if (mode_is_int(imode) || mode_is_reference(imode)) {
1521                 if (imode == env->params->high_signed) {
1522                         /* a Conv from Ls to Lu */
1523                         int op_idx = get_irn_idx(op);
1524
1525                         if (! env->entries[op_idx]->low_word) {
1526                                 /* not ready yet, wait */
1527                                 pdeq_putr(env->waitq, node);
1528                                 return;
1529                         }  /* if */
1530                         env->entries[idx]->low_word  = new_rd_Conv(dbg, block, env->entries[op_idx]->low_word, dst_mode);
1531                         env->entries[idx]->high_word = new_rd_Conv(dbg, block, env->entries[op_idx]->high_word, dst_mode);
1532                 } else {
1533                         /* simple case: create a high word */
1534                         if (imode != dst_mode)
1535                                 op = new_rd_Conv(dbg, block, op, dst_mode);
1536
1537                         env->entries[idx]->low_word  = op;
1538
1539                         if (mode_is_signed(imode)) {
1540                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, block, op,
1541                                         new_Const_long(dst_mode, get_mode_size_bits(dst_mode) - 1), dst_mode);
1542                         } else {
1543                                 env->entries[idx]->high_word = new_Const(get_mode_null(dst_mode));
1544                         }  /* if */
1545                 }  /* if */
1546         } else {
1547                 ir_node *irn, *call;
1548                 ir_mode *omode = env->params->high_unsigned;
1549                 ir_type *mtp = get_conv_type(imode, omode, env);
1550
1551                 /* do an intrinsic call */
1552                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1553                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1554                 set_irn_pinned(call, get_irn_pinned(node));
1555                 irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
1556
1557                 env->entries[idx]->low_word  = new_r_Proj(block, irn, dst_mode, 0);
1558                 env->entries[idx]->high_word = new_r_Proj(block, irn, dst_mode, 1);
1559         }  /* if */
1560 }  /* lower_Conv_to_Lu */
1561
1562 /**
1563  * Translate a Conv from higher_signed
1564  */
1565 static void lower_Conv_from_Ls(ir_node *node, lower_env_t *env) {
1566         ir_node  *op    = get_Conv_op(node);
1567         ir_mode  *omode = get_irn_mode(node);
1568         ir_node  *block = get_nodes_block(node);
1569         dbg_info *dbg = get_irn_dbg_info(node);
1570         int      idx = get_irn_idx(op);
1571         ir_graph *irg = current_ir_graph;
1572
1573         assert(idx < env->n_entries);
1574
1575         if (! env->entries[idx]->low_word) {
1576                 /* not ready yet, wait */
1577                 pdeq_putr(env->waitq, node);
1578                 return;
1579         }  /* if */
1580
1581         if (mode_is_int(omode) || mode_is_reference(omode)) {
1582                 op = env->entries[idx]->low_word;
1583
1584                 /* simple case: create a high word */
1585                 if (omode != env->params->low_signed)
1586                         op = new_rd_Conv(dbg, block, op, omode);
1587
1588                 set_Conv_op(node, op);
1589         } else {
1590                 ir_node *irn, *call, *in[2];
1591                 ir_mode *imode = env->params->high_signed;
1592                 ir_type *mtp = get_conv_type(imode, omode, env);
1593
1594                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1595                 in[0] = env->entries[idx]->low_word;
1596                 in[1] = env->entries[idx]->high_word;
1597
1598                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1599                 set_irn_pinned(call, get_irn_pinned(node));
1600                 irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
1601
1602                 exchange(node, new_r_Proj(block, irn, omode, 0));
1603         }  /* if */
1604 }  /* lower_Conv_from_Ls */
1605
1606 /**
1607  * Translate a Conv from higher_unsigned
1608  */
1609 static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
1610         ir_node  *op    = get_Conv_op(node);
1611         ir_mode  *omode = get_irn_mode(node);
1612         ir_node  *block = get_nodes_block(node);
1613         dbg_info *dbg = get_irn_dbg_info(node);
1614         int      idx = get_irn_idx(op);
1615         ir_graph *irg = current_ir_graph;
1616
1617         assert(idx < env->n_entries);
1618
1619         if (! env->entries[idx]->low_word) {
1620                 /* not ready yet, wait */
1621                 pdeq_putr(env->waitq, node);
1622                 return;
1623         }  /* if */
1624
1625         if (mode_is_int(omode) || mode_is_reference(omode)) {
1626                 op = env->entries[idx]->low_word;
1627
1628                 /* simple case: create a high word */
1629                 if (omode != env->params->low_unsigned)
1630                         op = new_rd_Conv(dbg, block, op, omode);
1631
1632                 set_Conv_op(node, op);
1633         } else {
1634                 ir_node *irn, *call, *in[2];
1635                 ir_mode *imode = env->params->high_unsigned;
1636                 ir_type *mtp = get_conv_type(imode, omode, env);
1637
1638                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1639                 in[0] = env->entries[idx]->low_word;
1640                 in[1] = env->entries[idx]->high_word;
1641
1642                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1643                 set_irn_pinned(call, get_irn_pinned(node));
1644                 irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
1645
1646                 exchange(node, new_r_Proj(block, irn, omode, 0));
1647         }  /* if */
1648 }  /* lower_Conv_from_Lu */
1649
1650 /**
1651  * Translate a Conv.
1652  */
1653 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env) {
1654         mode = get_irn_mode(node);
1655
1656         if (mode == env->params->high_signed) {
1657                 lower_Conv_to_Ls(node, env);
1658         } else if (mode == env->params->high_unsigned) {
1659                 lower_Conv_to_Lu(node, env);
1660         } else {
1661                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1662
1663                 if (mode == env->params->high_signed) {
1664                         lower_Conv_from_Ls(node, env);
1665                 } else if (mode == env->params->high_unsigned) {
1666                         lower_Conv_from_Lu(node, env);
1667                 }  /* if */
1668         }  /* if */
1669 }  /* lower_Conv */
1670
1671 /**
1672  * Lower the method type.
1673  *
1674  * @param mtp  the method type to lower
1675  * @param ent  the lower environment
1676  *
1677  * @return the lowered type
1678  */
1679 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
1680         pmap_entry *entry;
1681         ident      *id, *lid;
1682         ir_type    *res, *value_type;
1683
1684         if (is_lowered_type(mtp))
1685                 return mtp;
1686
1687         entry = pmap_find(lowered_type, mtp);
1688         if (! entry) {
1689                 int i, n, r, n_param, n_res;
1690
1691                 /* count new number of params */
1692                 n_param = n = get_method_n_params(mtp);
1693                 for (i = n_param - 1; i >= 0; --i) {
1694                         ir_type *tp = get_method_param_type(mtp, i);
1695
1696                         if (is_Primitive_type(tp)) {
1697                                 ir_mode *mode = get_type_mode(tp);
1698
1699                                 if (mode == env->params->high_signed ||
1700                                         mode == env->params->high_unsigned)
1701                                         ++n_param;
1702                         }  /* if */
1703                 }  /* for */
1704
1705                 /* count new number of results */
1706                 n_res = r = get_method_n_ress(mtp);
1707                 for (i = n_res - 1; i >= 0; --i) {
1708                         ir_type *tp = get_method_res_type(mtp, i);
1709
1710                         if (is_Primitive_type(tp)) {
1711                                 ir_mode *mode = get_type_mode(tp);
1712
1713                                 if (mode == env->params->high_signed ||
1714                                         mode == env->params->high_unsigned)
1715                                         ++n_res;
1716                         }  /* if */
1717                 }  /* for */
1718
1719                 id  = id_mangle_u(new_id_from_chars("L", 1), get_type_ident(mtp));
1720                 res = new_type_method(id, n_param, n_res);
1721
1722                 /* set param types and result types */
1723                 for (i = n_param = 0; i < n; ++i) {
1724                         ir_type *tp = get_method_param_type(mtp, i);
1725
1726                         if (is_Primitive_type(tp)) {
1727                                 ir_mode *mode = get_type_mode(tp);
1728
1729                                 if (mode == env->params->high_signed) {
1730                                         set_method_param_type(res, n_param++, tp_u);
1731                                         set_method_param_type(res, n_param++, tp_s);
1732                                 } else if (mode == env->params->high_unsigned) {
1733                                         set_method_param_type(res, n_param++, tp_u);
1734                                         set_method_param_type(res, n_param++, tp_u);
1735                                 } else {
1736                                         set_method_param_type(res, n_param++, tp);
1737                                 }  /* if */
1738                         } else {
1739                                 set_method_param_type(res, n_param++, tp);
1740                         }  /* if */
1741                 }  /* for */
1742                 for (i = n_res = 0; i < r; ++i) {
1743                         ir_type *tp = get_method_res_type(mtp, i);
1744
1745                         if (is_Primitive_type(tp)) {
1746                                 ir_mode *mode = get_type_mode(tp);
1747
1748                                 if (mode == env->params->high_signed) {
1749                                         set_method_res_type(res, n_res++, tp_u);
1750                                         set_method_res_type(res, n_res++, tp_s);
1751                                 } else if (mode == env->params->high_unsigned) {
1752                                         set_method_res_type(res, n_res++, tp_u);
1753                                         set_method_res_type(res, n_res++, tp_u);
1754                                 } else {
1755                                         set_method_res_type(res, n_res++, tp);
1756                                 }  /* if */
1757                         } else {
1758                                 set_method_res_type(res, n_res++, tp);
1759                         }  /* if */
1760                 }  /* for */
1761                 set_lowered_type(mtp, res);
1762                 pmap_insert(lowered_type, mtp, res);
1763
1764                 value_type = get_method_value_param_type(mtp);
1765                 if (value_type != NULL) {
1766                         /* this creates a new value parameter type */
1767                         (void)get_method_value_param_ent(res, 0);
1768
1769                         /* set new param positions */
1770                         for (i = n_param = 0; i < n; ++i) {
1771                                 ir_type   *tp  = get_method_param_type(mtp, i);
1772                                 ident     *id  = get_method_param_ident(mtp, i);
1773                                 ir_entity *ent = get_method_value_param_ent(mtp, i);
1774
1775                                 set_entity_link(ent, INT_TO_PTR(n_param));
1776                                 if (is_Primitive_type(tp)) {
1777                                         ir_mode *mode = get_type_mode(tp);
1778
1779                                         if (mode == env->params->high_signed || mode == env->params->high_unsigned) {
1780                                                 if (id != NULL) {
1781                                                         lid = id_mangle(id, env->first_id);
1782                                                         set_method_param_ident(res, n_param, lid);
1783                                                         set_entity_ident(get_method_value_param_ent(res, n_param), lid);
1784                                                         lid = id_mangle(id, env->next_id);
1785                                                         set_method_param_ident(res, n_param + 1, lid);
1786                                                         set_entity_ident(get_method_value_param_ent(res, n_param + 1), lid);
1787                                                 }  /* if */
1788                                                 n_param += 2;
1789                                                 continue;
1790                                         }  /* if */
1791                                 }  /* if */
1792                                 if (id != NULL) {
1793                                         set_method_param_ident(res, n_param, id);
1794                                         set_entity_ident(get_method_value_param_ent(res, n_param), id);
1795                                 }  /* if */
1796                                 ++n_param;
1797                         }  /* for */
1798
1799                         set_lowered_type(value_type, get_method_value_param_type(res));
1800                 }  /* if */
1801         } else {
1802                 res = entry->value;
1803         }  /* if */
1804         return res;
1805 }  /* lower_mtp */
1806
1807 /**
1808  * Translate a Return.
1809  */
1810 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
1811         ir_graph  *irg = current_ir_graph;
1812         ir_entity *ent = get_irg_entity(irg);
1813         ir_type   *mtp = get_entity_type(ent);
1814         ir_node   **in;
1815         int       i, j, n, idx;
1816         int       need_conv = 0;
1817         (void) mode;
1818
1819         /* check if this return must be lowered */
1820         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1821                 ir_node *pred = get_Return_res(node, i);
1822                 ir_mode *mode = get_irn_op_mode(pred);
1823
1824                 if (mode == env->params->high_signed ||
1825                         mode == env->params->high_unsigned) {
1826                         idx = get_irn_idx(pred);
1827                         if (! env->entries[idx]->low_word) {
1828                                 /* not ready yet, wait */
1829                                 pdeq_putr(env->waitq, node);
1830                                 return;
1831                         }  /* if */
1832                         need_conv = 1;
1833                 }  /* if */
1834         }  /* for */
1835         if (! need_conv)
1836                 return;
1837
1838         ent = get_irg_entity(irg);
1839         mtp = get_entity_type(ent);
1840
1841         mtp = lower_mtp(mtp, env);
1842         set_entity_type(ent, mtp);
1843
1844         /* create a new in array */
1845         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1846         in[0] = get_Return_mem(node);
1847
1848         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1849                 ir_node *pred = get_Return_res(node, i);
1850
1851                 idx = get_irn_idx(pred);
1852                 assert(idx < env->n_entries);
1853
1854                 if (env->entries[idx]) {
1855                         in[++j] = env->entries[idx]->low_word;
1856                         in[++j] = env->entries[idx]->high_word;
1857                 } else {
1858                         in[++j] = pred;
1859                 }  /* if */
1860         }  /* for */
1861
1862         set_irn_in(node, j+1, in);
1863 }  /* lower_Return */
1864
1865 /**
1866  * Translate the parameters.
1867  */
1868 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env) {
1869         ir_graph  *irg = get_irn_irg(node);
1870         ir_entity *ent = get_irg_entity(irg);
1871         ir_type   *tp  = get_entity_type(ent);
1872         ir_type   *mtp;
1873         long      *new_projs;
1874         int       i, j, n_params, rem;
1875         ir_node   *proj, *args;
1876         (void) mode;
1877
1878         if (is_lowered_type(tp)) {
1879                 mtp = get_associated_type(tp);
1880         } else {
1881                 mtp = tp;
1882         }  /* if */
1883         assert(! is_lowered_type(mtp));
1884
1885         n_params = get_method_n_params(mtp);
1886         if (n_params <= 0)
1887                 return;
1888
1889         NEW_ARR_A(long, new_projs, n_params);
1890
1891         /* first check if we have parameters that must be fixed */
1892         for (i = j = 0; i < n_params; ++i, ++j) {
1893                 ir_type *tp = get_method_param_type(mtp, i);
1894
1895                 new_projs[i] = j;
1896                 if (is_Primitive_type(tp)) {
1897                         ir_mode *mode = get_type_mode(tp);
1898
1899                         if (mode == env->params->high_signed ||
1900                                 mode == env->params->high_unsigned)
1901                                 ++j;
1902                 }  /* if */
1903         }  /* for */
1904         if (i == j)
1905                 return;
1906
1907         mtp = lower_mtp(mtp, env);
1908         set_entity_type(ent, mtp);
1909
1910         /* switch off optimization for new Proj nodes or they might be CSE'ed
1911            with not patched one's */
1912         rem = get_optimize();
1913         set_optimize(0);
1914
1915         /* ok, fix all Proj's and create new ones */
1916         args = get_irg_args(irg);
1917         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1918                 ir_node *pred = get_Proj_pred(proj);
1919                 long proj_nr;
1920                 int idx;
1921                 ir_mode *mode;
1922                 dbg_info *dbg;
1923
1924                 /* do not visit this node again */
1925                 mark_irn_visited(proj);
1926
1927                 if (pred != args)
1928                         continue;
1929
1930                 proj_nr = get_Proj_proj(proj);
1931                 set_Proj_proj(proj, new_projs[proj_nr]);
1932
1933                 idx = get_irn_idx(proj);
1934                 if (env->entries[idx]) {
1935                         ir_mode *low_mode = env->params->low_unsigned;
1936
1937                         mode = get_irn_mode(proj);
1938
1939                         if (mode == env->params->high_signed) {
1940                                 mode = env->params->low_signed;
1941                         } else {
1942                                 mode = env->params->low_unsigned;
1943                         }  /* if */
1944
1945                         dbg = get_irn_dbg_info(proj);
1946                         env->entries[idx]->low_word  =
1947                                 new_rd_Proj(dbg, get_nodes_block(proj), args, low_mode, new_projs[proj_nr]);
1948                         env->entries[idx]->high_word =
1949                                 new_rd_Proj(dbg, get_nodes_block(proj), args, mode, new_projs[proj_nr] + 1);
1950                 }  /* if */
1951         }  /* for */
1952         set_optimize(rem);
1953 }  /* lower_Start */
1954
1955 /**
1956  * Translate a Call.
1957  */
1958 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
1959         ir_type  *tp = get_Call_type(node);
1960         ir_type  *call_tp;
1961         ir_node  **in, *proj, *results;
1962         int      n_params, n_res, need_lower = 0;
1963         int      i, j;
1964         long     *res_numbers = NULL;
1965         (void) mode;
1966
1967         if (is_lowered_type(tp)) {
1968                 call_tp = get_associated_type(tp);
1969         } else {
1970                 call_tp = tp;
1971         }  /* if */
1972
1973         assert(! is_lowered_type(call_tp));
1974
1975         n_params = get_method_n_params(call_tp);
1976         for (i = 0; i < n_params; ++i) {
1977                 ir_type *tp = get_method_param_type(call_tp, i);
1978
1979                 if (is_Primitive_type(tp)) {
1980                         ir_mode *mode = get_type_mode(tp);
1981
1982                         if (mode == env->params->high_signed ||
1983                                 mode == env->params->high_unsigned) {
1984                                 need_lower = 1;
1985                                 break;
1986                         }  /* if */
1987                 }  /* if */
1988         }  /* for */
1989         n_res = get_method_n_ress(call_tp);
1990         if (n_res > 0) {
1991                 NEW_ARR_A(long, res_numbers, n_res);
1992
1993                 for (i = j = 0; i < n_res; ++i, ++j) {
1994                         ir_type *tp = get_method_res_type(call_tp, i);
1995
1996                         res_numbers[i] = j;
1997                         if (is_Primitive_type(tp)) {
1998                                 ir_mode *mode = get_type_mode(tp);
1999
2000                                 if (mode == env->params->high_signed ||
2001                                         mode == env->params->high_unsigned) {
2002                                         need_lower = 1;
2003                                         ++j;
2004                                 }  /* if */
2005                         }  /* if */
2006                 }  /* for */
2007         }  /* if */
2008
2009         if (! need_lower)
2010                 return;
2011
2012         /* let's lower it */
2013         call_tp = lower_mtp(call_tp, env);
2014         set_Call_type(node, call_tp);
2015
2016         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
2017
2018         in[0] = get_Call_mem(node);
2019         in[1] = get_Call_ptr(node);
2020
2021         for (j = 2, i = 0; i < n_params; ++i) {
2022                 ir_node *pred = get_Call_param(node, i);
2023                 int     idx = get_irn_idx(pred);
2024
2025                 if (env->entries[idx]) {
2026                         if (! env->entries[idx]->low_word) {
2027                                 /* not ready yet, wait */
2028                                 pdeq_putr(env->waitq, node);
2029                                 return;
2030                         }
2031                         in[j++] = env->entries[idx]->low_word;
2032                         in[j++] = env->entries[idx]->high_word;
2033                 } else {
2034                         in[j++] = pred;
2035                 }  /* if */
2036         }  /* for */
2037
2038         set_irn_in(node, j, in);
2039
2040         /* fix the results */
2041         results = NULL;
2042         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
2043                 long proj_nr = get_Proj_proj(proj);
2044
2045                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
2046                         /* found the result proj */
2047                         results = proj;
2048                         break;
2049                 }  /* if */
2050         }  /* for */
2051
2052         if (results) {          /* there are results */
2053                 int rem = get_optimize();
2054
2055                 /* switch off optimization for new Proj nodes or they might be CSE'ed
2056                    with not patched one's */
2057                 set_optimize(0);
2058                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
2059                         if (get_Proj_pred(proj) == results) {
2060                                 long proj_nr = get_Proj_proj(proj);
2061                                 int idx;
2062
2063                                 /* found a result */
2064                                 set_Proj_proj(proj, res_numbers[proj_nr]);
2065                                 idx = get_irn_idx(proj);
2066                                 if (env->entries[idx]) {
2067                                         ir_mode *mode = get_irn_mode(proj);
2068                                         ir_mode *low_mode = env->params->low_unsigned;
2069                                         dbg_info *dbg;
2070
2071                                         if (mode == env->params->high_signed) {
2072                                                 mode = env->params->low_signed;
2073                                         } else {
2074                                                 mode = env->params->low_unsigned;
2075                                         }  /* if */
2076
2077                                         dbg = get_irn_dbg_info(proj);
2078                                         env->entries[idx]->low_word  =
2079                                                 new_rd_Proj(dbg, get_nodes_block(proj), results, low_mode, res_numbers[proj_nr]);
2080                                         env->entries[idx]->high_word =
2081                                                 new_rd_Proj(dbg, get_nodes_block(proj), results, mode, res_numbers[proj_nr] + 1);
2082                                 }  /* if */
2083                                 mark_irn_visited(proj);
2084                         }  /* if */
2085                 }  /* for */
2086                 set_optimize(rem);
2087         }
2088 }  /* lower_Call */
2089
2090 /**
2091  * Translate an Unknown into two.
2092  */
2093 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env) {
2094         int      idx = get_irn_idx(node);
2095         ir_graph *irg = get_irn_irg(node);
2096         ir_mode  *low_mode = env->params->low_unsigned;
2097
2098         env->entries[idx]->low_word  = new_r_Unknown(irg, low_mode);
2099         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2100 }  /* lower_Unknown */
2101
2102 /**
2103  * Translate a Phi.
2104  *
2105  * First step: just create two templates
2106  */
2107 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
2108         ir_mode  *mode_l = env->params->low_unsigned;
2109         ir_graph *irg = get_irn_irg(phi);
2110         ir_node  *block, *unk_l, *unk_h, *phi_l, *phi_h;
2111         ir_node  **inl, **inh;
2112         dbg_info *dbg;
2113         int      idx, i, arity = get_Phi_n_preds(phi);
2114         int      enq = 0;
2115
2116         idx = get_irn_idx(phi);
2117         if (env->entries[idx]->low_word) {
2118                 /* Phi nodes already build, check for inputs */
2119                 ir_node *phil = env->entries[idx]->low_word;
2120                 ir_node *phih = env->entries[idx]->high_word;
2121
2122                 for (i = 0; i < arity; ++i) {
2123                         ir_node *pred = get_Phi_pred(phi, i);
2124                         int     idx = get_irn_idx(pred);
2125
2126                         if (env->entries[idx]->low_word) {
2127                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2128                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2129                         } else {
2130                                 /* still not ready */
2131                                 pdeq_putr(env->waitq, phi);
2132                                 return;
2133                         }  /* if */
2134                 }  /* for */
2135         }  /* if */
2136
2137         /* first create a new in array */
2138         NEW_ARR_A(ir_node *, inl, arity);
2139         NEW_ARR_A(ir_node *, inh, arity);
2140         unk_l = new_r_Unknown(irg, mode_l);
2141         unk_h = new_r_Unknown(irg, mode);
2142
2143         for (i = 0; i < arity; ++i) {
2144                 ir_node *pred = get_Phi_pred(phi, i);
2145                 int     idx = get_irn_idx(pred);
2146
2147                 if (env->entries[idx]->low_word) {
2148                         inl[i] = env->entries[idx]->low_word;
2149                         inh[i] = env->entries[idx]->high_word;
2150                 } else {
2151                         inl[i] = unk_l;
2152                         inh[i] = unk_h;
2153                         enq = 1;
2154                 }  /* if */
2155         }  /* for */
2156
2157         dbg   = get_irn_dbg_info(phi);
2158         block = get_nodes_block(phi);
2159
2160         idx = get_irn_idx(phi);
2161         assert(idx < env->n_entries);
2162         env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, block, arity, inl, mode_l);
2163         env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, block, arity, inh, mode);
2164
2165         /* Don't forget to link the new Phi nodes into the block.
2166          * Beware that some Phis might be optimized away. */
2167         if (is_Phi(phi_l))
2168                 add_Block_phi(block, phi_l);
2169         if (is_Phi(phi_h))
2170                 add_Block_phi(block, phi_h);
2171
2172         if (enq) {
2173                 /* not yet finished */
2174                 pdeq_putr(env->waitq, phi);
2175         }  /* if */
2176 }  /* lower_Phi */
2177
2178 /**
2179  * Translate a Mux.
2180  */
2181 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env) {
2182         ir_node  *block, *val;
2183         ir_node  *true_l, *true_h, *false_l, *false_h, *sel;
2184         dbg_info *dbg;
2185         int      idx;
2186
2187         val = get_Mux_true(mux);
2188         idx = get_irn_idx(val);
2189         if (env->entries[idx]->low_word) {
2190                 /* Values already build */
2191                 true_l = env->entries[idx]->low_word;
2192                 true_h = env->entries[idx]->high_word;
2193         } else {
2194                 /* still not ready */
2195                 pdeq_putr(env->waitq, mux);
2196                 return;
2197         }  /* if */
2198
2199         val = get_Mux_false(mux);
2200         idx = get_irn_idx(val);
2201         if (env->entries[idx]->low_word) {
2202                 /* Values already build */
2203                 false_l = env->entries[idx]->low_word;
2204                 false_h = env->entries[idx]->high_word;
2205         } else {
2206                 /* still not ready */
2207                 pdeq_putr(env->waitq, mux);
2208                 return;
2209         }  /* if */
2210
2211
2212         sel = get_Mux_sel(mux);
2213
2214         dbg   = get_irn_dbg_info(mux);
2215         block = get_nodes_block(mux);
2216
2217         idx = get_irn_idx(mux);
2218         assert(idx < env->n_entries);
2219         env->entries[idx]->low_word  = new_rd_Mux(dbg, block, sel, false_l, true_l, mode);
2220         env->entries[idx]->high_word = new_rd_Mux(dbg, block, sel, false_h, true_h, mode);
2221 }  /* lower_Mux */
2222
2223 /**
2224  * Translate an ASM node.
2225  */
2226 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env) {
2227         ir_mode *his = env->params->high_signed;
2228         ir_mode *hiu = env->params->high_unsigned;
2229         int      i;
2230         ir_node *n;
2231
2232         (void)mode;
2233
2234         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2235                 ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
2236                 if (op_mode == his || op_mode == hiu) {
2237                         panic("lowering ASM unimplemented");
2238                 }  /* if */
2239         }  /* for */
2240
2241         for (n = asmn;;) {
2242                 ir_mode *proj_mode;
2243
2244                 n = get_irn_link(n);
2245                 if (n == NULL)
2246                         break;
2247
2248                 proj_mode = get_irn_mode(n);
2249                 if (proj_mode == his || proj_mode == hiu) {
2250                         panic("lowering ASM unimplemented");
2251                 }  /* if */
2252         }  /* for */
2253 }  /* lower_ASM */
2254
2255 /**
2256  * Translate a Sel node.
2257  */
2258 static void lower_Sel(ir_node *sel, ir_mode *mode, lower_env_t *env) {
2259         (void) mode;
2260
2261         /* we must only lower value parameter Sels if we change the
2262            value parameter type. */
2263         if (env->value_param_tp != NULL) {
2264                 ir_entity *ent = get_Sel_entity(sel);
2265             if (get_entity_owner(ent) == env->value_param_tp) {
2266                         int pos = PTR_TO_INT(get_entity_link(ent));
2267
2268                         ent = get_method_value_param_ent(env->l_mtp, pos);
2269                         set_Sel_entity(sel, ent);
2270                 }  /* if */
2271         }  /* if */
2272 }  /* lower_Sel */
2273
2274 /**
2275  * check for opcodes that must always be lowered.
2276  */
2277 static int always_lower(ir_opcode code) {
2278         switch (code) {
2279         case iro_ASM:
2280         case iro_Proj:
2281         case iro_Start:
2282         case iro_Call:
2283         case iro_Return:
2284         case iro_Cond:
2285         case iro_Conv:
2286         case iro_Sel:
2287                 return 1;
2288         default:
2289                 return 0;
2290         }  /* switch */
2291 }  /* always_lower */
2292
2293 /**
2294  * lower boolean Proj(Cmp)
2295  */
2296 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env) {
2297         int      lidx, ridx;
2298         ir_node  *l, *r, *low, *high, *t, *res;
2299         pn_Cmp   pnc;
2300         ir_node  *blk;
2301         dbg_info *db;
2302
2303         l    = get_Cmp_left(cmp);
2304         lidx = get_irn_idx(l);
2305         if (! env->entries[lidx]->low_word) {
2306                 /* still not ready */
2307                 return NULL;
2308         }  /* if */
2309
2310         r    = get_Cmp_right(cmp);
2311         ridx = get_irn_idx(r);
2312         if (! env->entries[ridx]->low_word) {
2313                 /* still not ready */
2314                 return NULL;
2315         }  /* if */
2316
2317         pnc  = get_Proj_proj(proj);
2318         blk  = get_nodes_block(cmp);
2319         db   = get_irn_dbg_info(cmp);
2320         low  = new_rd_Cmp(db, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2321         high = new_rd_Cmp(db, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2322
2323         if (pnc == pn_Cmp_Eq) {
2324                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2325                 res = new_rd_And(db, blk,
2326                         new_r_Proj(blk, low, mode_b, pnc),
2327                         new_r_Proj(blk, high, mode_b, pnc),
2328                         mode_b);
2329         } else if (pnc == pn_Cmp_Lg) {
2330                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2331                 res = new_rd_Or(db, blk,
2332                         new_r_Proj(blk, low, mode_b, pnc),
2333                         new_r_Proj(blk, high, mode_b, pnc),
2334                         mode_b);
2335         } else {
2336                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2337                 t = new_rd_And(db, blk,
2338                         new_r_Proj(blk, low, mode_b, pnc),
2339                         new_r_Proj(blk, high, mode_b, pn_Cmp_Eq),
2340                         mode_b);
2341                 res = new_rd_Or(db, blk,
2342                         new_r_Proj(blk, high, mode_b, pnc & ~pn_Cmp_Eq),
2343                         t,
2344                         mode_b);
2345         }  /* if */
2346         return res;
2347 }  /* lower_boolean_Proj_Cmp */
2348
2349 /**
2350  * The type of a lower function.
2351  *
2352  * @param node   the node to be lowered
2353  * @param mode   the low mode for the destination node
2354  * @param env    the lower environment
2355  */
2356 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2357
2358 /**
2359  * Lower a node.
2360  */
2361 static void lower_ops(ir_node *node, void *env)
2362 {
2363         lower_env_t  *lenv = env;
2364         node_entry_t *entry;
2365         int          idx = get_irn_idx(node);
2366         ir_mode      *mode = get_irn_mode(node);
2367
2368         if (mode == mode_b || is_Mux(node) || is_Conv(node)) {
2369                 int i;
2370
2371                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2372                         ir_node *proj = get_irn_n(node, i);
2373
2374                         if (is_Proj(proj)) {
2375                                 ir_node *cmp = get_Proj_pred(proj);
2376
2377                                 if (is_Cmp(cmp)) {
2378                                         ir_node *arg = get_Cmp_left(cmp);
2379
2380                                         mode = get_irn_mode(arg);
2381                                         if (mode == lenv->params->high_signed ||
2382                                                 mode == lenv->params->high_unsigned) {
2383                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2384
2385                                                 if (res == NULL) {
2386                                                         /* could not lower because predecessors not ready */
2387                                                         waitq_put(lenv->waitq, node);
2388                                                         return;
2389                                                 }  /* if */
2390                                                 set_irn_n(node, i, res);
2391                                         }  /* if */
2392                                 }  /* if */
2393                         }  /* if */
2394                 }  /* for */
2395         }  /* if */
2396
2397         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2398         if (entry || always_lower(get_irn_opcode(node))) {
2399                 ir_op      *op = get_irn_op(node);
2400                 lower_func func = (lower_func)op->ops.generic;
2401
2402                 if (func) {
2403                         mode = get_irn_op_mode(node);
2404
2405                         if (mode == lenv->params->high_signed)
2406                                 mode = lenv->params->low_signed;
2407                         else
2408                                 mode = lenv->params->low_unsigned;
2409
2410                         DB((dbg, LEVEL_1, "  %+F\n", node));
2411                         func(node, mode, lenv);
2412                 }  /* if */
2413         }  /* if */
2414 }  /* lower_ops */
2415
2416 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2417
2418 /**
2419  * Compare two op_mode_entry_t's.
2420  */
2421 static int cmp_op_mode(const void *elt, const void *key, size_t size) {
2422         const op_mode_entry_t *e1 = elt;
2423         const op_mode_entry_t *e2 = key;
2424         (void) size;
2425
2426         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2427 }  /* cmp_op_mode */
2428
2429 /**
2430  * Compare two conv_tp_entry_t's.
2431  */
2432 static int cmp_conv_tp(const void *elt, const void *key, size_t size) {
2433         const conv_tp_entry_t *e1 = elt;
2434         const conv_tp_entry_t *e2 = key;
2435         (void) size;
2436
2437         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2438 }  /* cmp_conv_tp */
2439
2440 /**
2441  * Enter a lowering function into an ir_op.
2442  */
2443 static void enter_lower_func(ir_op *op, lower_func func) {
2444         op->ops.generic = (op_func)func;
2445 }  /* enter_lower_func */
2446
2447 /**
2448  * Returns non-zero if a method type must be lowered.
2449  *
2450  * @param mtp  the method type
2451  */
2452 static int mtp_must_to_lowered(ir_type *mtp, lower_env_t *env) {
2453         int i, n_params;
2454
2455         n_params = get_method_n_params(mtp);
2456         if (n_params <= 0)
2457                 return 0;
2458
2459         /* first check if we have parameters that must be fixed */
2460         for (i = 0; i < n_params; ++i) {
2461                 ir_type *tp = get_method_param_type(mtp, i);
2462
2463                 if (is_Primitive_type(tp)) {
2464                         ir_mode *mode = get_type_mode(tp);
2465
2466                         if (mode == env->params->high_signed ||
2467                                 mode == env->params->high_unsigned)
2468                                 return 1;
2469                 }  /* if */
2470         }  /* for */
2471         return 0;
2472 }  /* mtp_must_to_lowered */
2473
2474 /*
2475  * Do the lowering.
2476  */
2477 void lower_dw_ops(const lwrdw_param_t *param)
2478 {
2479         lower_env_t lenv;
2480         int         i;
2481         ir_graph    *rem;
2482
2483         if (! param)
2484                 return;
2485
2486         if (! param->enable)
2487                 return;
2488
2489         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2490
2491         assert(2 * get_mode_size_bits(param->low_signed)   == get_mode_size_bits(param->high_signed));
2492         assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
2493         assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
2494
2495         /* create the necessary maps */
2496         if (! prim_types)
2497                 prim_types = pmap_create();
2498         if (! intrinsic_fkt)
2499                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2500         if (! conv_types)
2501                 conv_types = new_set(cmp_conv_tp, 16);
2502         if (! lowered_type)
2503                 lowered_type = pmap_create();
2504
2505         /* create a primitive unsigned and signed type */
2506         if (! tp_u)
2507                 tp_u = get_primitive_type(param->low_unsigned);
2508         if (! tp_s)
2509                 tp_s = get_primitive_type(param->low_signed);
2510
2511         /* create method types for the created binop calls */
2512         if (! binop_tp_u) {
2513                 binop_tp_u = new_type_method(IDENT("binop_u_intrinsic"), 4, 2);
2514                 set_method_param_type(binop_tp_u, 0, tp_u);
2515                 set_method_param_type(binop_tp_u, 1, tp_u);
2516                 set_method_param_type(binop_tp_u, 2, tp_u);
2517                 set_method_param_type(binop_tp_u, 3, tp_u);
2518                 set_method_res_type(binop_tp_u, 0, tp_u);
2519                 set_method_res_type(binop_tp_u, 1, tp_u);
2520         }  /* if */
2521         if (! binop_tp_s) {
2522                 binop_tp_s = new_type_method(IDENT("binop_s_intrinsic"), 4, 2);
2523                 set_method_param_type(binop_tp_s, 0, tp_u);
2524                 set_method_param_type(binop_tp_s, 1, tp_s);
2525                 set_method_param_type(binop_tp_s, 2, tp_u);
2526                 set_method_param_type(binop_tp_s, 3, tp_s);
2527                 set_method_res_type(binop_tp_s, 0, tp_u);
2528                 set_method_res_type(binop_tp_s, 1, tp_s);
2529         }  /* if */
2530         if (! shiftop_tp_u) {
2531                 shiftop_tp_u = new_type_method(IDENT("shiftop_u_intrinsic"), 3, 2);
2532                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2533                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2534                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2535                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2536                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2537         }  /* if */
2538         if (! shiftop_tp_s) {
2539                 shiftop_tp_s = new_type_method(IDENT("shiftop_s_intrinsic"), 3, 2);
2540                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2541                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2542                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2543                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2544                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2545         }  /* if */
2546         if (! unop_tp_u) {
2547                 unop_tp_u = new_type_method(IDENT("unop_u_intrinsic"), 2, 2);
2548                 set_method_param_type(unop_tp_u, 0, tp_u);
2549                 set_method_param_type(unop_tp_u, 1, tp_u);
2550                 set_method_res_type(unop_tp_u, 0, tp_u);
2551                 set_method_res_type(unop_tp_u, 1, tp_u);
2552         }  /* if */
2553         if (! unop_tp_s) {
2554                 unop_tp_s = new_type_method(IDENT("unop_s_intrinsic"), 2, 2);
2555                 set_method_param_type(unop_tp_s, 0, tp_u);
2556                 set_method_param_type(unop_tp_s, 1, tp_s);
2557                 set_method_res_type(unop_tp_s, 0, tp_u);
2558                 set_method_res_type(unop_tp_s, 1, tp_s);
2559         }  /* if */
2560
2561         lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), param->low_unsigned);
2562         lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), param->low_unsigned);
2563         lenv.waitq         = new_pdeq();
2564         lenv.params        = param;
2565         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
2566         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
2567
2568         /* first clear the generic function pointer for all ops */
2569         clear_irp_opcodes_generic_func();
2570
2571 #define LOWER2(op, fkt)   enter_lower_func(op_##op, fkt)
2572 #define LOWER(op)         LOWER2(op, lower_##op)
2573 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2574 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2575
2576         /* the table of all operations that must be lowered follows */
2577         LOWER(ASM);
2578         LOWER(Load);
2579         LOWER(Store);
2580         LOWER(Const);
2581         LOWER(And);
2582         LOWER(Or);
2583         LOWER(Eor);
2584         LOWER(Not);
2585         LOWER(Cond);
2586         LOWER(Return);
2587         LOWER(Call);
2588         LOWER(Unknown);
2589         LOWER(Phi);
2590         LOWER(Mux);
2591         LOWER(Start);
2592
2593         LOWER_BIN(Add);
2594         LOWER_BIN(Sub);
2595         LOWER_BIN(Mul);
2596         LOWER(Shl);
2597         LOWER(Shr);
2598         LOWER(Shrs);
2599         LOWER(Rotl);
2600         LOWER(DivMod);
2601         LOWER(Div);
2602         LOWER(Mod);
2603         LOWER(Sel);
2604         LOWER_UN(Abs);
2605         LOWER_UN(Minus);
2606
2607         LOWER(Conv);
2608
2609 #undef LOWER_UN
2610 #undef LOWER_BIN
2611 #undef LOWER
2612 #undef LOWER2
2613
2614         /* transform all graphs */
2615         rem = current_ir_graph;
2616         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2617                 ir_graph  *irg = get_irp_irg(i);
2618                 ir_entity *ent;
2619                 ir_type   *mtp;
2620                 int n_idx;
2621
2622                 obstack_init(&lenv.obst);
2623
2624                 n_idx = get_irg_last_idx(irg);
2625                 n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2626                 lenv.n_entries = n_idx;
2627                 lenv.entries   = NEW_ARR_F(node_entry_t *, n_idx);
2628                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2629
2630                 lenv.l_mtp        = NULL;
2631                 lenv.flags        = 0;
2632                 lenv.proj_2_block = pmap_create();
2633                 lenv.value_param_tp = NULL;
2634                 ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2635
2636                 ent = get_irg_entity(irg);
2637                 mtp = get_entity_type(ent);
2638
2639                 if (mtp_must_to_lowered(mtp, &lenv)) {
2640                         ir_type *ltp = lower_mtp(mtp, &lenv);
2641                         lenv.flags |= MUST_BE_LOWERED;
2642                         set_entity_type(ent, ltp);
2643                         lenv.l_mtp = ltp;
2644                         lenv.value_param_tp = get_method_value_param_type(mtp);
2645                 }  /* if */
2646
2647                 /* first step: link all nodes and allocate data */
2648                 irg_walk_graph(irg, firm_clear_node_and_phi_links, prepare_links_and_handle_rotl, &lenv);
2649
2650                 if (lenv.flags & MUST_BE_LOWERED) {
2651                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2652
2653                         /* must do some work */
2654                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2655
2656                         /* last step: all waiting nodes */
2657                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2658                         current_ir_graph = irg;
2659                         while (! pdeq_empty(lenv.waitq)) {
2660                                 ir_node *node = pdeq_getl(lenv.waitq);
2661
2662                                 lower_ops(node, &lenv);
2663                         }  /* while */
2664
2665                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2666
2667                         /* outs are invalid, we changed the graph */
2668                         set_irg_outs_inconsistent(irg);
2669
2670                         if (lenv.flags & CF_CHANGED) {
2671                                 /* control flow changed, dominance info is invalid */
2672                                 set_irg_doms_inconsistent(irg);
2673                                 set_irg_extblk_inconsistent(irg);
2674                                 set_irg_loopinfo_inconsistent(irg);
2675                         }  /* if */
2676                 } else {
2677                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2678                 }  /* if */
2679                 pmap_destroy(lenv.proj_2_block);
2680                 DEL_ARR_F(lenv.entries);
2681                 obstack_free(&lenv.obst, NULL);
2682         }  /* for */
2683         del_pdeq(lenv.waitq);
2684         current_ir_graph = rem;
2685 }  /* lower_dw_ops */
2686
2687 struct pass_t {
2688         ir_prog_pass_t      pass;
2689         const lwrdw_param_t *param;
2690 };
2691
2692 /**
2693  * Creates a wrapper around lower_dw_ops().
2694  */
2695 static int pass_wrapper(ir_prog *irp, void *context)
2696 {
2697         struct pass_t *pass = context;
2698
2699         (void)irp;
2700         lower_dw_ops(pass->param);
2701         return 0;
2702 }
2703
2704 ir_prog_pass_t *lower_dw_ops_pass(const char *name, const lwrdw_param_t *param) {
2705         struct pass_t *pass = XMALLOCZ(struct pass_t);
2706
2707         pass->param = param;
2708         return def_prog_pass_constructor(
2709                 &pass->pass, name ? name : "lower_dw", pass_wrapper);
2710 }  /* lower_dw_ops_pass */
2711
2712 /* Default implementation. */
2713 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2714                                     const ir_mode *imode, const ir_mode *omode,
2715                                     void *context)
2716 {
2717         char buf[64];
2718         ident *id;
2719         ir_entity *ent;
2720         (void) context;
2721
2722         if (imode == omode) {
2723                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2724         } else {
2725                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2726                         get_mode_name(imode), get_mode_name(omode));
2727         }  /* if */
2728         id = new_id_from_str(buf);
2729
2730         ent = new_entity(get_glob_type(), id, method);
2731         set_entity_ld_ident(ent, get_entity_ident(ent));
2732         set_entity_visibility(ent, visibility_external_allocated);
2733         return ent;
2734 }  /* def_create_intrinsic_fkt */