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