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

   1 /*
   2  * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
   3  *
   4  * This file is part of libFirm.
   5  *
   6  * This file may be distributed and/or modified under the terms of the
   7  * GNU General Public License version 2 as published by the Free Software
   8  * Foundation and appearing in the file LICENSE.GPL included in the
   9  * packaging of this file.
  10  *
  11  * Licensees holding valid libFirm Professional Edition licenses may use
  12  * this file in accordance with the libFirm Commercial License.
  13  * Agreement provided with the Software.
  14  *
  15  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  16  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE.
  18  */
  19
  20 /**
  21  * @file
  22  * @brief   Lower Double word operations, ie 64bit -> 32bit, 32bit -> 16bit etc.
  23  * @date    8.10.2004
  24  * @author  Michael Beck
  25  * @version $Id$
  26  */
  27 #include "config.h"
  28
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <assert.h>
  32
  33 #include "error.h"
  34 #include "lowering.h"
  35 #include "irnode_t.h"
  36 #include "irgraph_t.h"
  37 #include "irmode_t.h"
  38 #include "iropt_t.h"
  39 #include "irgmod.h"
  40 #include "tv_t.h"
  41 #include "dbginfo_t.h"
  42 #include "iropt_dbg.h"
  43 #include "irflag_t.h"
  44 #include "firmstat.h"
  45 #include "irgwalk.h"
  46 #include "ircons.h"
  47 #include "irflag.h"
  48 #include "irtools.h"
  49 #include "debug.h"
  50 #include "set.h"
  51 #include "pmap.h"
  52 #include "pdeq.h"
  53 #include "irdump.h"
  54 #include "array_t.h"
  55
  56 /** A map from mode to a primitive type. */
  57 static pmap *prim_types;
  58
  59 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  60 static set *intrinsic_fkt;
  61
  62 /** A map from (imode, omode) to conv function types. */
  63 static set *conv_types;
  64
  65 /** A map from a method type to its lowered type. */
  66 static pmap *lowered_type;
  67
  68 /** The types for the binop and unop intrinsics. */
  69 static ir_type *binop_tp_u, *binop_tp_s, *unop_tp_u, *unop_tp_s, *shiftop_tp_u, *shiftop_tp_s, *tp_s, *tp_u;
  70
  71 /** the debug handle */
  72 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  73
  74 /**
  75  * An entry in the (op, imode, omode) -> entity map.
  76  */
  77 typedef struct _op_mode_entry {
  78         const ir_op   *op;    /**< the op */
  79         const ir_mode *imode; /**< the input mode */
  80         const ir_mode *omode; /**< the output mode */
  81         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  82 } op_mode_entry_t;
  83
  84 /**
  85  * An entry in the (imode, omode) -> tp map.
  86  */
  87 typedef struct _conv_tp_entry {
  88         const ir_mode *imode; /**< the input mode */
  89         const ir_mode *omode; /**< the output mode */
  90         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
  91 } conv_tp_entry_t;
  92
  93 /**
  94  * Every double word node will be replaced,
  95  * we need some store to hold the replacement:
  96  */
  97 typedef struct _node_entry_t {
  98         ir_node *low_word;    /**< the low word */
  99         ir_node *high_word;   /**< the high word */
 100 } node_entry_t;
 101
 102 enum lower_flags {
 103         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 104         CF_CHANGED      = 2,  /**< control flow was changed */
 105 };
 106
 107 /**
 108  * The lower environment.
 109  */
 110 typedef struct _lower_env_t {
 111         node_entry_t **entries;       /**< entries per node */
 112         struct obstack obst;          /**< an obstack holding the temporary data */
 113         ir_type  *l_mtp;              /**< lowered method type of the current method */
 114         tarval   *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 115         tarval   *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 116         pdeq     *waitq;              /**< a wait queue of all nodes that must be handled later */
 117         pmap     *proj_2_block;       /**< a map from ProjX to its destination blocks */
 118         ident    *first_id;           /**< .l for little and .h for big endian */
 119         ident    *next_id;            /**< .h for little and .l for big endian */
 120         const lwrdw_param_t *params;  /**< transformation parameter */
 121         unsigned flags;               /**< some flags */
 122         int      n_entries;           /**< number of entries */
 123         ir_type  *value_param_tp;     /**< the old value param type */
 124 } lower_env_t;
 125
 126 /**
 127  * Get a primitive mode for a mode.
 128  */
 129 static ir_type *get_primitive_type(ir_mode *mode) {
 130         pmap_entry *entry = pmap_find(prim_types, mode);
 131         ir_type *tp;
 132         char buf[64];
 133
 134         if (entry)
 135                 return entry->value;
 136
 137         snprintf(buf, sizeof(buf), "_prim_%s", get_mode_name(mode));
 138         tp = new_type_primitive(new_id_from_str(buf), mode);
 139
 140         pmap_insert(prim_types, mode, tp);
 141         return tp;
 142 }  /* get_primitive_type */
 143
 144 /**
 145  * Create a method type for a Conv emulation from imode to omode.
 146  */
 147 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env) {
 148         conv_tp_entry_t key, *entry;
 149         ir_type *mtd;
 150
 151         key.imode = imode;
 152         key.omode = omode;
 153         key.mtd   = NULL;
 154
 155         entry = set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 156         if (! entry->mtd) {
 157                 int n_param = 1, n_res = 1;
 158                 char buf[64];
 159
 160                 if (imode == env->params->high_signed || imode == env->params->high_unsigned)
 161                         n_param = 2;
 162                 if (omode == env->params->high_signed || omode == env->params->high_unsigned)
 163                         n_res = 2;
 164
 165                 /* create a new one */
 166                 snprintf(buf, sizeof(buf), "LConv%s%s", get_mode_name(imode), get_mode_name(omode));
 167                 mtd = new_type_method(new_id_from_str(buf), n_param, n_res);
 168
 169                 /* set param types and result types */
 170                 n_param = 0;
 171                 if (imode == env->params->high_signed) {
 172                         set_method_param_type(mtd, n_param++, tp_u);
 173                         set_method_param_type(mtd, n_param++, tp_s);
 174                 } else if (imode == env->params->high_unsigned) {
 175                         set_method_param_type(mtd, n_param++, tp_u);
 176                         set_method_param_type(mtd, n_param++, tp_u);
 177                 } else {
 178                         ir_type *tp = get_primitive_type(imode);
 179                         set_method_param_type(mtd, n_param++, tp);
 180                 }  /* if */
 181
 182                 n_res = 0;
 183                 if (omode == env->params->high_signed) {
 184                         set_method_res_type(mtd, n_res++, tp_u);
 185                         set_method_res_type(mtd, n_res++, tp_s);
 186                 } else if (omode == env->params->high_unsigned) {
 187                         set_method_res_type(mtd, n_res++, tp_u);
 188                         set_method_res_type(mtd, n_res++, tp_u);
 189                 } else {
 190                         ir_type *tp = get_primitive_type(omode);
 191                         set_method_res_type(mtd, n_res++, tp);
 192                 }  /* if */
 193                 entry->mtd = mtd;
 194         } else {
 195                 mtd = entry->mtd;
 196         }  /* if */
 197         return mtd;
 198 }  /* get_conv_type */
 199
 200 /**
 201  * Add an additional control flow input to a block.
 202  * Patch all Phi nodes. The new Phi inputs are copied from
 203  * old input number nr.
 204  */
 205 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 206 {
 207         int i, arity = get_irn_arity(block);
 208         ir_node **in, *phi;
 209
 210         assert(nr < arity);
 211
 212         NEW_ARR_A(ir_node *, in, arity + 1);
 213         for (i = 0; i < arity; ++i)
 214                 in[i] = get_irn_n(block, i);
 215         in[i] = cf;
 216
 217         set_irn_in(block, i + 1, in);
 218
 219         for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
 220                 for (i = 0; i < arity; ++i)
 221                         in[i] = get_irn_n(phi, i);
 222                 in[i] = in[nr];
 223                 set_irn_in(phi, i + 1, in);
 224         }  /* for */
 225 }  /* add_block_cf_input_nr */
 226
 227 /**
 228  * Add an additional control flow input to a block.
 229  * Patch all Phi nodes. The new Phi inputs are copied from
 230  * old input from cf tmpl.
 231  */
 232 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 233 {
 234         int i, arity = get_irn_arity(block);
 235         int nr = 0;
 236
 237         for (i = 0; i < arity; ++i) {
 238                 if (get_irn_n(block, i) == tmpl) {
 239                         nr = i;
 240                         break;
 241                 }  /* if */
 242         }  /* for */
 243         assert(i < arity);
 244         add_block_cf_input_nr(block, nr, cf);
 245 }  /* add_block_cf_input */
 246
 247 /**
 248  * Return the "operational" mode of a Firm node.
 249  */
 250 static ir_mode *get_irn_op_mode(ir_node *node)
 251 {
 252         switch (get_irn_opcode(node)) {
 253         case iro_Load:
 254                 return get_Load_mode(node);
 255         case iro_Store:
 256                 return get_irn_mode(get_Store_value(node));
 257         case iro_DivMod:
 258                 return get_irn_mode(get_DivMod_left(node));
 259         case iro_Div:
 260                 return get_irn_mode(get_Div_left(node));
 261         case iro_Mod:
 262                 return get_irn_mode(get_Mod_left(node));
 263         case iro_Cmp:
 264                 return get_irn_mode(get_Cmp_left(node));
 265         default:
 266                 return get_irn_mode(node);
 267         }  /* switch */
 268 }  /* get_irn_op_mode */
 269
 270 /**
 271  * Walker, prepare the node links.
 272  */
 273 static void prepare_links(ir_node *node, void *env)
 274 {
 275         lower_env_t  *lenv = env;
 276         ir_mode      *mode = get_irn_op_mode(node);
 277         node_entry_t *link;
 278         int          i, idx;
 279
 280         if (mode == lenv->params->high_signed ||
 281                 mode == lenv->params->high_unsigned) {
 282                 /* ok, found a node that will be lowered */
 283                 link = obstack_alloc(&lenv->obst, sizeof(*link));
 284
 285                 memset(link, 0, sizeof(*link));
 286
 287                 idx = get_irn_idx(node);
 288                 if (idx >= lenv->n_entries) {
 289                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 290                         int old = lenv->n_entries;
 291                         int n_idx = idx + (idx >> 3);
 292
 293                         ARR_RESIZE(node_entry_t *, lenv->entries, n_idx);
 294                         memset(&lenv->entries[old], 0, (n_idx - old) * sizeof(lenv->entries[0]));
 295                         lenv->n_entries = n_idx;
 296                 }
 297                 lenv->entries[idx] = link;
 298                 lenv->flags |= MUST_BE_LOWERED;
 299         } else if (is_Conv(node)) {
 300                 /* Conv nodes have two modes */
 301                 ir_node *pred = get_Conv_op(node);
 302                 mode = get_irn_mode(pred);
 303
 304                 if (mode == lenv->params->high_signed ||
 305                         mode == lenv->params->high_unsigned) {
 306                         /* must lower this node either but don't need a link */
 307                         lenv->flags |= MUST_BE_LOWERED;
 308                 }  /* if */
 309                 return;
 310         }  /* if */
 311
 312         if (is_Proj(node)) {
 313                 /* link all Proj nodes to its predecessor:
 314                    Note that Tuple Proj's and its Projs are linked either. */
 315                 ir_node *pred = get_Proj_pred(node);
 316
 317                 set_irn_link(node, get_irn_link(pred));
 318                 set_irn_link(pred, node);
 319         } else if (is_Phi(node)) {
 320                 /* link all Phi nodes to its block */
 321                 ir_node *block = get_nodes_block(node);
 322                 add_Block_phi(block, node);
 323         } else if (is_Block(node)) {
 324                 /* fill the Proj -> Block map */
 325                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 326                         ir_node *pred = get_Block_cfgpred(node, i);
 327
 328                         if (is_Proj(pred))
 329                                 pmap_insert(lenv->proj_2_block, pred, node);
 330                 }  /* for */
 331         }  /* if */
 332 }  /* prepare_links */
 333
 334 /**
 335  * Translate a Constant: create two.
 336  */
 337 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env) {
 338         tarval   *tv, *tv_l, *tv_h;
 339         ir_node  *low, *high;
 340         dbg_info *dbg = get_irn_dbg_info(node);
 341         int      idx;
 342         ir_graph *irg = current_ir_graph;
 343         ir_mode  *low_mode = env->params->low_unsigned;
 344
 345         tv   = get_Const_tarval(node);
 346
 347         tv_l = tarval_convert_to(tv, low_mode);
 348         low  = new_rd_Const(dbg, irg, tv_l);
 349
 350         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 351         high = new_rd_Const(dbg, irg, tv_h);
 352
 353         idx = get_irn_idx(node);
 354         assert(idx < env->n_entries);
 355         env->entries[idx]->low_word  = low;
 356         env->entries[idx]->high_word = high;
 357 }  /* lower_Const */
 358
 359 /**
 360  * Translate a Load: create two.
 361  */
 362 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env) {
 363         ir_mode    *low_mode = env->params->low_unsigned;
 364         ir_graph   *irg = current_ir_graph;
 365         ir_node    *adr = get_Load_ptr(node);
 366         ir_node    *mem = get_Load_mem(node);
 367         ir_node    *low, *high, *proj;
 368         dbg_info   *dbg;
 369         ir_node    *block = get_nodes_block(node);
 370         int         idx;
 371         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 372                                  ? cons_volatile : 0;
 373
 374         if (env->params->little_endian) {
 375                 low  = adr;
 376                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 377         } else {
 378                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 379                 high = adr;
 380         }  /* if */
 381
 382         /* create two loads */
 383         dbg  = get_irn_dbg_info(node);
 384         low  = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 385         proj = new_r_Proj(block, low, mode_M, pn_Load_M);
 386         high = new_rd_Load(dbg, block, proj, high, mode, volatility);
 387
 388         idx = get_irn_idx(node);
 389         assert(idx < env->n_entries);
 390         env->entries[idx]->low_word  = low;
 391         env->entries[idx]->high_word = high;
 392
 393         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 394                 idx = get_irn_idx(proj);
 395
 396                 switch (get_Proj_proj(proj)) {
 397                 case pn_Load_M:         /* Memory result. */
 398                         /* put it to the second one */
 399                         set_Proj_pred(proj, high);
 400                         break;
 401                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 402                         /* put it to the first one */
 403                         set_Proj_pred(proj, low);
 404                         break;
 405                 case pn_Load_res:       /* Result of load operation. */
 406                         assert(idx < env->n_entries);
 407                         env->entries[idx]->low_word  = new_r_Proj(block, low,  low_mode, pn_Load_res);
 408                         env->entries[idx]->high_word = new_r_Proj(block, high, mode,     pn_Load_res);
 409                         break;
 410                 default:
 411                         assert(0 && "unexpected Proj number");
 412                 }  /* switch */
 413                 /* mark this proj: we have handled it already, otherwise we might fall into
 414                  * out new nodes. */
 415                 mark_irn_visited(proj);
 416         }  /* for */
 417 }  /* lower_Load */
 418
 419 /**
 420  * Translate a Store: create two.
 421  */
 422 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env) {
 423         ir_graph     *irg;
 424         ir_node      *block, *adr, *mem;
 425         ir_node      *low, *high, *irn, *proj;
 426         dbg_info     *dbg;
 427         int           idx;
 428         node_entry_t *entry;
 429         ir_cons_flags    volatility = get_Store_volatility(node) == volatility_is_volatile
 430                                    ? cons_volatile : 0;
 431         (void) mode;
 432
 433         irn = get_Store_value(node);
 434         entry = env->entries[get_irn_idx(irn)];
 435         assert(entry);
 436
 437         if (! entry->low_word) {
 438                 /* not ready yet, wait */
 439                 pdeq_putr(env->waitq, node);
 440                 return;
 441         }  /* if */
 442
 443         irg = current_ir_graph;
 444         adr = get_Store_ptr(node);
 445         mem = get_Store_mem(node);
 446         block = get_nodes_block(node);
 447
 448         if (env->params->little_endian) {
 449                 low  = adr;
 450                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 451         } else {
 452                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 453                 high = adr;
 454         }  /* if */
 455
 456         /* create two Stores */
 457         dbg = get_irn_dbg_info(node);
 458         low  = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 459         proj = new_r_Proj(block, low, mode_M, pn_Store_M);
 460         high = new_rd_Store(dbg, block, proj, high, entry->high_word, volatility);
 461
 462         idx = get_irn_idx(node);
 463         assert(idx < env->n_entries);
 464         env->entries[idx]->low_word  = low;
 465         env->entries[idx]->high_word = high;
 466
 467         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 468                 idx = get_irn_idx(proj);
 469
 470                 switch (get_Proj_proj(proj)) {
 471                 case pn_Store_M:         /* Memory result. */
 472                         /* put it to the second one */
 473                         set_Proj_pred(proj, high);
 474                         break;
 475                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 476                         /* put it to the first one */
 477                         set_Proj_pred(proj, low);
 478                         break;
 479                 default:
 480                         assert(0 && "unexpected Proj number");
 481                 }  /* switch */
 482                 /* mark this proj: we have handled it already, otherwise we might fall into
 483                  * out new nodes. */
 484                 mark_irn_visited(proj);
 485         }  /* for */
 486 }  /* lower_Store */
 487
 488 /**
 489  * Return a node containing the address of the intrinsic emulation function.
 490  *
 491  * @param method  the method type of the emulation function
 492  * @param op      the emulated ir_op
 493  * @param imode   the input mode of the emulated opcode
 494  * @param omode   the output mode of the emulated opcode
 495  * @param env     the lower environment
 496  */
 497 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 498                                       ir_mode *imode, ir_mode *omode,
 499                                       lower_env_t *env) {
 500         symconst_symbol sym;
 501         ir_entity *ent;
 502         op_mode_entry_t key, *entry;
 503
 504         key.op    = op;
 505         key.imode = imode;
 506         key.omode = omode;
 507         key.ent   = NULL;
 508
 509         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 510                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 511         if (! entry->ent) {
 512                 /* create a new one */
 513                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 514
 515                 assert(ent && "Intrinsic creator must return an entity");
 516                 entry->ent = ent;
 517         } else {
 518                 ent = entry->ent;
 519         }  /* if */
 520         sym.entity_p = ent;
 521         return new_r_SymConst(current_ir_graph, mode_P_code, sym, symconst_addr_ent);
 522 }  /* get_intrinsic_address */
 523
 524 /**
 525  * Translate a Div.
 526  *
 527  * Create an intrinsic Call.
 528  */
 529 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env) {
 530         ir_node  *block, *irn, *call, *proj;
 531         ir_node  *in[4];
 532         ir_mode  *opmode;
 533         dbg_info *dbg;
 534         ir_type  *mtp;
 535         int      idx;
 536         node_entry_t *entry;
 537
 538         irn   = get_Div_left(node);
 539         entry = env->entries[get_irn_idx(irn)];
 540         assert(entry);
 541
 542         if (! entry->low_word) {
 543                 /* not ready yet, wait */
 544                 pdeq_putr(env->waitq, node);
 545                 return;
 546         }  /* if */
 547
 548         in[0] = entry->low_word;
 549         in[1] = entry->high_word;
 550
 551         irn   = get_Div_right(node);
 552         entry = env->entries[get_irn_idx(irn)];
 553         assert(entry);
 554
 555         if (! entry->low_word) {
 556                 /* not ready yet, wait */
 557                 pdeq_putr(env->waitq, node);
 558                 return;
 559         }  /* if */
 560
 561         in[2] = entry->low_word;
 562         in[3] = entry->high_word;
 563
 564         dbg   = get_irn_dbg_info(node);
 565         block = get_nodes_block(node);
 566
 567         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 568         opmode = get_irn_op_mode(node);
 569         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 570         call = new_rd_Call(dbg, block, get_Div_mem(node), irn, 4, in, mtp);
 571         set_irn_pinned(call, get_irn_pinned(node));
 572         irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
 573
 574         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 575                 switch (get_Proj_proj(proj)) {
 576                 case pn_Div_M:         /* Memory result. */
 577                         /* reroute to the call */
 578                         set_Proj_pred(proj, call);
 579                         set_Proj_proj(proj, pn_Call_M_except);
 580                         break;
 581                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 582                         /* reroute to the call */
 583                         set_Proj_pred(proj, call);
 584                         set_Proj_proj(proj, pn_Call_X_except);
 585                         break;
 586                 case pn_Div_res:       /* Result of computation. */
 587                         idx = get_irn_idx(proj);
 588                         assert(idx < env->n_entries);
 589                         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 590                         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 591                         break;
 592                 default:
 593                         assert(0 && "unexpected Proj number");
 594                 }  /* switch */
 595                 /* mark this proj: we have handled it already, otherwise we might fall into
 596                  * out new nodes. */
 597                 mark_irn_visited(proj);
 598         }  /* for */
 599 }  /* lower_Div */
 600
 601 /**
 602  * Translate a Mod.
 603  *
 604  * Create an intrinsic Call.
 605  */
 606 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 607         ir_node  *block, *proj, *irn, *call;
 608         ir_node  *in[4];
 609         ir_mode  *opmode;
 610         dbg_info *dbg;
 611         ir_type  *mtp;
 612         int      idx;
 613         node_entry_t *entry;
 614
 615         irn   = get_Mod_left(node);
 616         entry = env->entries[get_irn_idx(irn)];
 617         assert(entry);
 618
 619         if (! entry->low_word) {
 620                 /* not ready yet, wait */
 621                 pdeq_putr(env->waitq, node);
 622                 return;
 623         }  /* if */
 624
 625         in[0] = entry->low_word;
 626         in[1] = entry->high_word;
 627
 628         irn   = get_Mod_right(node);
 629         entry = env->entries[get_irn_idx(irn)];
 630         assert(entry);
 631
 632         if (! entry->low_word) {
 633                 /* not ready yet, wait */
 634                 pdeq_putr(env->waitq, node);
 635                 return;
 636         }  /* if */
 637
 638         in[2] = entry->low_word;
 639         in[3] = entry->high_word;
 640
 641         dbg   = get_irn_dbg_info(node);
 642         block = get_nodes_block(node);
 643
 644         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 645         opmode = get_irn_op_mode(node);
 646         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 647         call = new_rd_Call(dbg, block, get_Mod_mem(node), irn, 4, in, mtp);
 648         set_irn_pinned(call, get_irn_pinned(node));
 649         irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
 650
 651         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 652                 switch (get_Proj_proj(proj)) {
 653                 case pn_Mod_M:         /* Memory result. */
 654                         /* reroute to the call */
 655                         set_Proj_pred(proj, call);
 656                         set_Proj_proj(proj, pn_Call_M_except);
 657                         break;
 658                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 659                         /* reroute to the call */
 660                         set_Proj_pred(proj, call);
 661                         set_Proj_proj(proj, pn_Call_X_except);
 662                         break;
 663                 case pn_Mod_res:       /* Result of computation. */
 664                         idx = get_irn_idx(proj);
 665                         assert(idx < env->n_entries);
 666                         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 667                         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 668                         break;
 669                 default:
 670                         assert(0 && "unexpected Proj number");
 671                 }  /* switch */
 672                 /* mark this proj: we have handled it already, otherwise we might fall into
 673                  * out new nodes. */
 674                 mark_irn_visited(proj);
 675         }  /* for */
 676 }  /* lower_Mod */
 677
 678 /**
 679  * Translate a DivMod.
 680  *
 681  * Create two intrinsic Calls.
 682  */
 683 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 684         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod;
 685         ir_node  *resDiv = NULL;
 686         ir_node  *resMod = NULL;
 687         ir_node  *in[4];
 688         ir_mode  *opmode;
 689         dbg_info *dbg;
 690         ir_type  *mtp;
 691         int      idx;
 692         node_entry_t *entry;
 693         unsigned flags = 0;
 694
 695         /* check if both results are needed */
 696         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 697                 switch (get_Proj_proj(proj)) {
 698                 case pn_DivMod_res_div: flags |= 1; break;
 699                 case pn_DivMod_res_mod: flags |= 2; break;
 700                 default: break;
 701                 }  /* switch */
 702         }  /* for */
 703
 704         irn   = get_DivMod_left(node);
 705         entry = env->entries[get_irn_idx(irn)];
 706         assert(entry);
 707
 708         if (! entry->low_word) {
 709                 /* not ready yet, wait */
 710                 pdeq_putr(env->waitq, node);
 711                 return;
 712         }  /* if */
 713
 714         in[0] = entry->low_word;
 715         in[1] = entry->high_word;
 716
 717         irn   = get_DivMod_right(node);
 718         entry = env->entries[get_irn_idx(irn)];
 719         assert(entry);
 720
 721         if (! entry->low_word) {
 722                 /* not ready yet, wait */
 723                 pdeq_putr(env->waitq, node);
 724                 return;
 725         }  /* if */
 726
 727         in[2] = entry->low_word;
 728         in[3] = entry->high_word;
 729
 730         dbg   = get_irn_dbg_info(node);
 731         block = get_nodes_block(node);
 732
 733         mem = get_DivMod_mem(node);
 734
 735         callDiv = callMod = NULL;
 736         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 737         if (flags & 1) {
 738                 opmode = get_irn_op_mode(node);
 739                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, env);
 740                 callDiv = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 741                 set_irn_pinned(callDiv, get_irn_pinned(node));
 742                 resDiv = new_r_Proj(block, callDiv, mode_T, pn_Call_T_result);
 743         }  /* if */
 744         if (flags & 2) {
 745                 if (flags & 1)
 746                         mem = new_r_Proj(block, callDiv, mode_M, pn_Call_M);
 747                 opmode = get_irn_op_mode(node);
 748                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, env);
 749                 callMod = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 750                 set_irn_pinned(callMod, get_irn_pinned(node));
 751                 resMod = new_r_Proj(block, callMod, mode_T, pn_Call_T_result);
 752         }  /* if */
 753
 754         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 755                 switch (get_Proj_proj(proj)) {
 756                 case pn_DivMod_M:         /* Memory result. */
 757                         /* reroute to the first call */
 758                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 759                         set_Proj_proj(proj, pn_Call_M_except);
 760                         break;
 761                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 762                         /* reroute to the first call */
 763                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 764                         set_Proj_proj(proj, pn_Call_X_except);
 765                         break;
 766                 case pn_DivMod_res_div:   /* Result of Div. */
 767                         idx = get_irn_idx(proj);
 768                         assert(idx < env->n_entries);
 769                         env->entries[idx]->low_word  = new_r_Proj(block, resDiv, env->params->low_unsigned, 0);
 770                         env->entries[idx]->high_word = new_r_Proj(block, resDiv, mode,                      1);
 771                         break;
 772                 case pn_DivMod_res_mod:   /* Result of Mod. */
 773                         idx = get_irn_idx(proj);
 774                         env->entries[idx]->low_word  = new_r_Proj(block, resMod, env->params->low_unsigned, 0);
 775                         env->entries[idx]->high_word = new_r_Proj(block, resMod, mode,                      1);
 776                         break;
 777                 default:
 778                         assert(0 && "unexpected Proj number");
 779                 }  /* switch */
 780                 /* mark this proj: we have handled it already, otherwise we might fall into
 781                  * out new nodes. */
 782                 mark_irn_visited(proj);
 783         }  /* for */
 784 }  /* lower_DivMod */
 785
 786 /**
 787  * Translate a Binop.
 788  *
 789  * Create an intrinsic Call.
 790  */
 791 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 792         ir_node  *block, *irn;
 793         ir_node  *in[4];
 794         dbg_info *dbg;
 795         ir_type  *mtp;
 796         int      idx;
 797         ir_graph *irg;
 798         node_entry_t *entry;
 799
 800         irn   = get_binop_left(node);
 801         entry = env->entries[get_irn_idx(irn)];
 802         assert(entry);
 803
 804         if (! entry->low_word) {
 805                 /* not ready yet, wait */
 806                 pdeq_putr(env->waitq, node);
 807                 return;
 808         }  /* if */
 809
 810         in[0] = entry->low_word;
 811         in[1] = entry->high_word;
 812
 813         irn   = get_binop_right(node);
 814         entry = env->entries[get_irn_idx(irn)];
 815         assert(entry);
 816
 817         if (! entry->low_word) {
 818                 /* not ready yet, wait */
 819                 pdeq_putr(env->waitq, node);
 820                 return;
 821         }  /* if */
 822
 823         in[2] = entry->low_word;
 824         in[3] = entry->high_word;
 825
 826         dbg   = get_irn_dbg_info(node);
 827         block = get_nodes_block(node);
 828         irg   = current_ir_graph;
 829
 830         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 831         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 832         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 833                 irn, 4, in, mtp);
 834         set_irn_pinned(irn, get_irn_pinned(node));
 835         irn = new_r_Proj(block, irn, mode_T, pn_Call_T_result);
 836
 837         idx = get_irn_idx(node);
 838         assert(idx < env->n_entries);
 839         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 840         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 841 }  /* lower_Binop */
 842
 843 /**
 844  * Translate a Shiftop.
 845  *
 846  * Create an intrinsic Call.
 847  */
 848 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 849         ir_node  *block, *irn;
 850         ir_node  *in[3];
 851         dbg_info *dbg;
 852         ir_type  *mtp;
 853         int      idx;
 854         ir_graph *irg;
 855         node_entry_t *entry;
 856
 857         irn   = get_binop_left(node);
 858         entry = env->entries[get_irn_idx(irn)];
 859         assert(entry);
 860
 861         if (! entry->low_word) {
 862                 /* not ready yet, wait */
 863                 pdeq_putr(env->waitq, node);
 864                 return;
 865         }  /* if */
 866
 867         in[0] = entry->low_word;
 868         in[1] = entry->high_word;
 869
 870         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 871         in[2] = get_binop_right(node);
 872
 873         dbg   = get_irn_dbg_info(node);
 874         block = get_nodes_block(node);
 875         irg  = current_ir_graph;
 876
 877         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 878         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 879         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 880                 irn, 3, in, mtp);
 881         set_irn_pinned(irn, get_irn_pinned(node));
 882         irn = new_r_Proj(block, irn, mode_T, pn_Call_T_result);
 883
 884         idx = get_irn_idx(node);
 885         assert(idx < env->n_entries);
 886         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
 887         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
 888 }  /* lower_Shiftop */
 889
 890 /**
 891  * Translate a Shr and handle special cases.
 892  */
 893 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env) {
 894         ir_node  *right = get_Shr_right(node);
 895         ir_graph *irg = current_ir_graph;
 896
 897         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 898                 tarval *tv = get_Const_tarval(right);
 899
 900                 if (tarval_is_long(tv) &&
 901                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 902                         ir_node *block = get_nodes_block(node);
 903                         ir_node *left = get_Shr_left(node);
 904                         ir_node *c;
 905                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 906                         int idx = get_irn_idx(left);
 907
 908                         left = env->entries[idx]->high_word;
 909                         idx = get_irn_idx(node);
 910
 911                         if (shf_cnt > 0) {
 912                                 c = new_r_Const_long(irg, env->params->low_unsigned, shf_cnt);
 913                                 env->entries[idx]->low_word = new_r_Shr(block, left, c, mode);
 914                         } else {
 915                                 env->entries[idx]->low_word = left;
 916                         }  /* if */
 917                         env->entries[idx]->high_word = new_r_Const(irg, get_mode_null(mode));
 918
 919                         return;
 920                 }  /* if */
 921         }  /* if */
 922         lower_Shiftop(node, mode, env);
 923 }  /* lower_Shr */
 924
 925 /**
 926  * Translate a Shl and handle special cases.
 927  */
 928 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env) {
 929         ir_node  *right = get_Shl_right(node);
 930         ir_graph *irg = current_ir_graph;
 931
 932         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 933                 tarval *tv = get_Const_tarval(right);
 934
 935                 if (tarval_is_long(tv) &&
 936                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 937                         ir_mode *mode_l;
 938                         ir_node *block = get_nodes_block(node);
 939                         ir_node *left = get_Shl_left(node);
 940                         ir_node *c;
 941                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 942                         int idx = get_irn_idx(left);
 943
 944                         left = new_r_Conv(block, env->entries[idx]->low_word, mode);
 945                         idx = get_irn_idx(node);
 946
 947                         mode_l = env->params->low_unsigned;
 948                         if (shf_cnt > 0) {
 949                                 c = new_r_Const_long(irg, mode_l, shf_cnt);
 950                                 env->entries[idx]->high_word = new_r_Shl(block, left, c, mode);
 951                         } else {
 952                                 env->entries[idx]->high_word = left;
 953                         }  /* if */
 954                         env->entries[idx]->low_word  = new_r_Const(irg, get_mode_null(mode_l));
 955
 956                         return;
 957                 }  /* if */
 958         }  /* if */
 959         lower_Shiftop(node, mode, env);
 960 }  /* lower_Shl */
 961
 962 /**
 963  * Translate a Shrs and handle special cases.
 964  */
 965 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env) {
 966         ir_node  *right = get_Shrs_right(node);
 967         ir_graph *irg = current_ir_graph;
 968
 969         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 970                 tarval *tv = get_Const_tarval(right);
 971
 972                 if (tarval_is_long(tv) &&
 973                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 974                         ir_node *block   = get_nodes_block(node);
 975                         ir_node *left    = get_Shrs_left(node);
 976                         long     shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 977                         int      idx     = get_irn_idx(left);
 978                         ir_mode *mode_l;
 979                         ir_node *low;
 980                         ir_node *c;
 981
 982                         left = env->entries[idx]->high_word;
 983                         idx = get_irn_idx(node);
 984
 985                         mode_l = env->params->low_unsigned;
 986                         if (shf_cnt > 0) {
 987                                 c   = new_r_Const_long(irg, mode_l, shf_cnt);
 988                                 low = new_r_Shrs(block, left, c, mode);
 989                         } else {
 990                                 low = left;
 991                         }  /* if */
 992                         /* low word is expected to have mode_l */
 993                         env->entries[idx]->low_word = new_r_Conv(block, low, mode_l);
 994
 995                         c = new_r_Const_long(irg, mode_l, get_mode_size_bits(mode) - 1);
 996                         env->entries[idx]->high_word = new_r_Shrs(block, left, c, mode);
 997
 998                         return;
 999                 }  /* if */
1000         }  /* if */
1001         lower_Shiftop(node, mode, env);
1002 }  /* lower_Shrs */
1003
1004 /**
1005  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1006  */
1007 static void prepare_links_and_handle_rotl(ir_node *node, void *env) {
1008         lower_env_t *lenv = env;
1009
1010         if (is_Rotl(node)) {
1011                 ir_mode *mode = get_irn_op_mode(node);
1012                         if (mode == lenv->params->high_signed ||
1013                             mode == lenv->params->high_unsigned) {
1014                                 ir_node  *right = get_Rotl_right(node);
1015                                 ir_node  *left, *shl, *shr, *or, *block, *sub, *c;
1016                                 ir_mode  *omode, *rmode;
1017                                 dbg_info *dbg;
1018                                 optimization_state_t state;
1019
1020                                 if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1021                                         tarval *tv = get_Const_tarval(right);
1022
1023                                         if (tarval_is_long(tv) &&
1024                                             get_tarval_long(tv) == (long)get_mode_size_bits(mode)) {
1025                                                 /* will be optimized in lower_Rotl() */
1026                                                 return;
1027                                         }
1028                                 }
1029
1030                                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) and lower those */
1031                                 dbg   = get_irn_dbg_info(node);
1032                                 omode = get_irn_mode(node);
1033                                 left  = get_Rotl_left(node);
1034                                 block = get_nodes_block(node);
1035                                 shl   = new_rd_Shl(dbg, block, left, right, omode);
1036                                 rmode = get_irn_mode(right);
1037                                 c     = new_Const_long(rmode, get_mode_size_bits(omode));
1038                                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
1039                                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
1040
1041                                 /* optimization must be switched off here, or we will get the Rotl back */
1042                                 save_optimization_state(&state);
1043                                 set_opt_algebraic_simplification(0);
1044                                 or = new_rd_Or(dbg, block, shl, shr, omode);
1045                                 restore_optimization_state(&state);
1046
1047                                 exchange(node, or);
1048
1049                                 /* do lowering on the new nodes */
1050                                 prepare_links(shl, env);
1051                                 prepare_links(c, env);
1052                                 prepare_links(sub, env);
1053                                 prepare_links(shr, env);
1054                                 prepare_links(or, env);
1055                         }
1056         } else {
1057                 prepare_links(node, env);
1058         }
1059 }
1060
1061 /**
1062  * Translate a special case Rotl(x, sizeof(w)).
1063  */
1064 static void lower_Rotl(ir_node *node, ir_mode *mode, lower_env_t *env) {
1065         ir_node *right = get_Rotl_right(node);
1066         ir_node *left = get_Rotl_left(node);
1067         ir_node *h, *l;
1068         int idx = get_irn_idx(left);
1069         (void) right;
1070         (void) mode;
1071
1072         assert(get_mode_arithmetic(mode) == irma_twos_complement &&
1073                is_Const(right) && tarval_is_long(get_Const_tarval(right)) &&
1074                get_tarval_long(get_Const_tarval(right)) == (long)get_mode_size_bits(mode));
1075
1076         l = env->entries[idx]->low_word;
1077         h = env->entries[idx]->high_word;
1078         idx = get_irn_idx(node);
1079
1080         env->entries[idx]->low_word  = h;
1081         env->entries[idx]->high_word = l;
1082 }  /* lower_Rotl */
1083
1084 /**
1085  * Translate an Unop.
1086  *
1087  * Create an intrinsic Call.
1088  */
1089 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env) {
1090         ir_node  *block, *irn;
1091         ir_node  *in[2];
1092         dbg_info *dbg;
1093         ir_type  *mtp;
1094         int      idx;
1095         node_entry_t *entry;
1096
1097         irn   = get_unop_op(node);
1098         entry = env->entries[get_irn_idx(irn)];
1099         assert(entry);
1100
1101         if (! entry->low_word) {
1102                 /* not ready yet, wait */
1103                 pdeq_putr(env->waitq, node);
1104                 return;
1105         }  /* if */
1106
1107         in[0] = entry->low_word;
1108         in[1] = entry->high_word;
1109
1110         dbg   = get_irn_dbg_info(node);
1111         block = get_nodes_block(node);
1112
1113         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1114         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
1115         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
1116                 irn, 2, in, mtp);
1117         set_irn_pinned(irn, get_irn_pinned(node));
1118         irn = new_r_Proj(block, irn, mode_T, pn_Call_T_result);
1119
1120         idx = get_irn_idx(node);
1121         assert(idx < env->n_entries);
1122         env->entries[idx]->low_word  = new_r_Proj(block, irn, env->params->low_unsigned, 0);
1123         env->entries[idx]->high_word = new_r_Proj(block, irn, mode,                      1);
1124 }  /* lower_Unop */
1125
1126 /**
1127  * Translate a logical Binop.
1128  *
1129  * Create two logical Binops.
1130  */
1131 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1132                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1133         ir_node  *block, *irn;
1134         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1135         dbg_info *dbg;
1136         int      idx;
1137         ir_graph *irg;
1138         node_entry_t *entry;
1139
1140         irn   = get_binop_left(node);
1141         entry = env->entries[get_irn_idx(irn)];
1142         assert(entry);
1143
1144         if (! entry->low_word) {
1145                 /* not ready yet, wait */
1146                 pdeq_putr(env->waitq, node);
1147                 return;
1148         }  /* if */
1149
1150         lop_l = entry->low_word;
1151         lop_h = entry->high_word;
1152
1153         irn   = get_binop_right(node);
1154         entry = env->entries[get_irn_idx(irn)];
1155         assert(entry);
1156
1157         if (! entry->low_word) {
1158                 /* not ready yet, wait */
1159                 pdeq_putr(env->waitq, node);
1160                 return;
1161         }  /* if */
1162
1163         rop_l = entry->low_word;
1164         rop_h = entry->high_word;
1165
1166         dbg = get_irn_dbg_info(node);
1167         block = get_nodes_block(node);
1168
1169         idx = get_irn_idx(node);
1170         assert(idx < env->n_entries);
1171         irg = current_ir_graph;
1172         env->entries[idx]->low_word  = constr_rd(dbg, block, lop_l, rop_l, env->params->low_unsigned);
1173         env->entries[idx]->high_word = constr_rd(dbg, block, lop_h, rop_h, mode);
1174 }  /* lower_Binop_logical */
1175
1176 /** create a logical operation transformation */
1177 #define lower_logical(op)                                                \
1178 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1179         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1180 }
1181
1182 lower_logical(And)
1183 lower_logical(Or)
1184 lower_logical(Eor)
1185
1186 /**
1187  * Translate a Not.
1188  *
1189  * Create two logical Nots.
1190  */
1191 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env) {
1192         ir_node  *block, *irn;
1193         ir_node  *op_l, *op_h;
1194         dbg_info *dbg;
1195         int      idx;
1196         node_entry_t *entry;
1197
1198         irn   = get_Not_op(node);
1199         entry = env->entries[get_irn_idx(irn)];
1200         assert(entry);
1201
1202         if (! entry->low_word) {
1203                 /* not ready yet, wait */
1204                 pdeq_putr(env->waitq, node);
1205                 return;
1206         }  /* if */
1207
1208         op_l = entry->low_word;
1209         op_h = entry->high_word;
1210
1211         dbg   = get_irn_dbg_info(node);
1212         block = get_nodes_block(node);
1213
1214         idx = get_irn_idx(node);
1215         assert(idx < env->n_entries);
1216         env->entries[idx]->low_word  = new_rd_Not(dbg, block, op_l, env->params->low_unsigned);
1217         env->entries[idx]->high_word = new_rd_Not(dbg, block, op_h, mode);
1218 }  /* lower_Not */
1219
1220 /**
1221  * Translate a Cond.
1222  */
1223 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
1224         ir_node *cmp, *left, *right, *block;
1225         ir_node *sel = get_Cond_selector(node);
1226         ir_mode *m = get_irn_mode(sel);
1227         int     idx;
1228         (void) mode;
1229
1230         if (m == mode_b) {
1231                 node_entry_t *lentry, *rentry;
1232                 ir_node  *proj, *projT = NULL, *projF = NULL;
1233                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1234                 ir_node  *projHF, *projHT;
1235                 ir_node  *dst_blk;
1236                 pn_Cmp   pnc;
1237                 ir_graph *irg;
1238                 dbg_info *dbg;
1239
1240                 if(!is_Proj(sel))
1241                         return;
1242
1243                 cmp   = get_Proj_pred(sel);
1244                 if(!is_Cmp(cmp))
1245                         return;
1246
1247                 left  = get_Cmp_left(cmp);
1248                 idx   = get_irn_idx(left);
1249                 lentry = env->entries[idx];
1250
1251                 if (! lentry) {
1252                         /* a normal Cmp */
1253                         return;
1254                 }  /* if */
1255
1256                 right = get_Cmp_right(cmp);
1257                 idx   = get_irn_idx(right);
1258                 rentry = env->entries[idx];
1259                 assert(rentry);
1260
1261                 if (! lentry->low_word || !rentry->low_word) {
1262                         /* not yet ready */
1263                         pdeq_putr(env->waitq, node);
1264                         return;
1265                 }  /* if */
1266
1267                 /* all right, build the code */
1268                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1269                         long proj_nr = get_Proj_proj(proj);
1270
1271                         if (proj_nr == pn_Cond_true) {
1272                                 assert(projT == NULL && "more than one Proj(true)");
1273                                 projT = proj;
1274                         } else {
1275                                 assert(proj_nr == pn_Cond_false);
1276                                 assert(projF == NULL && "more than one Proj(false)");
1277                                 projF = proj;
1278                         }  /* if */
1279                         mark_irn_visited(proj);
1280                 }  /* for */
1281                 assert(projT && projF);
1282
1283                 /* create a new high compare */
1284                 block = get_nodes_block(node);
1285                 irg   = get_Block_irg(block);
1286                 dbg   = get_irn_dbg_info(cmp);
1287                 pnc   = get_Proj_proj(sel);
1288
1289                 if (is_Const(right) && is_Const_null(right)) {
1290                         if (pnc == pn_Cmp_Eq || pnc == pn_Cmp_Lg) {
1291                                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1292                                 ir_mode *mode = env->params->low_unsigned;
1293                                 ir_node *low  = new_r_Conv(block, lentry->low_word, mode);
1294                                 ir_node *high = new_r_Conv(block, lentry->high_word, mode);
1295                                 ir_node *or   = new_rd_Or(dbg, block, low, high, mode);
1296                                 ir_node *cmp  = new_rd_Cmp(dbg, block, or, new_Const_long(mode, 0));
1297
1298                                 ir_node *proj = new_r_Proj(block, cmp, mode_b, pnc);
1299                                 set_Cond_selector(node, proj);
1300                                 return;
1301                         }
1302                 }
1303
1304                 cmpH = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word);
1305
1306                 if (pnc == pn_Cmp_Eq) {
1307                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1308                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1309
1310                         assert(entry);
1311                         dst_blk = entry->value;
1312
1313                         irn = new_r_Proj(block, cmpH, mode_b, pn_Cmp_Eq);
1314                         dbg = get_irn_dbg_info(node);
1315                         irn = new_rd_Cond(dbg, block, irn);
1316
1317                         projHF = new_r_Proj(block, irn, mode_X, pn_Cond_false);
1318                         mark_irn_visited(projHF);
1319                         exchange(projF, projHF);
1320
1321                         projHT = new_r_Proj(block, irn, mode_X, pn_Cond_true);
1322                         mark_irn_visited(projHT);
1323
1324                         new_bl = new_r_Block(irg, 1, &projHT);
1325
1326                         dbg   = get_irn_dbg_info(cmp);
1327                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1328                         irn = new_r_Proj(new_bl, cmpL, mode_b, pn_Cmp_Eq);
1329                         dbg = get_irn_dbg_info(node);
1330                         irn = new_rd_Cond(dbg, new_bl, irn);
1331
1332                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_false);
1333                         mark_irn_visited(proj);
1334                         add_block_cf_input(dst_blk, projHF, proj);
1335
1336                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_true);
1337                         mark_irn_visited(proj);
1338                         exchange(projT, proj);
1339                 } else if (pnc == pn_Cmp_Lg) {
1340                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1341                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1342
1343                         assert(entry);
1344                         dst_blk = entry->value;
1345
1346                         irn = new_r_Proj(block, cmpH, mode_b, pn_Cmp_Lg);
1347                         dbg = get_irn_dbg_info(node);
1348                         irn = new_rd_Cond(dbg, block, irn);
1349
1350                         projHT = new_r_Proj(block, irn, mode_X, pn_Cond_true);
1351                         mark_irn_visited(projHT);
1352                         exchange(projT, projHT);
1353
1354                         projHF = new_r_Proj(block, irn, mode_X, pn_Cond_false);
1355                         mark_irn_visited(projHF);
1356
1357                         new_bl = new_r_Block(irg, 1, &projHF);
1358
1359                         dbg   = get_irn_dbg_info(cmp);
1360                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1361                         irn = new_r_Proj(new_bl, cmpL, mode_b, pn_Cmp_Lg);
1362                         dbg = get_irn_dbg_info(node);
1363                         irn = new_rd_Cond(dbg, new_bl, irn);
1364
1365                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_true);
1366                         mark_irn_visited(proj);
1367                         add_block_cf_input(dst_blk, projHT, proj);
1368
1369                         proj = new_r_Proj(new_bl, irn, mode_X, pn_Cond_false);
1370                         mark_irn_visited(proj);
1371                         exchange(projF, proj);
1372                 } else {
1373                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1374                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1375                         pmap_entry *entry;
1376
1377                         entry = pmap_find(env->proj_2_block, projT);
1378                         assert(entry);
1379                         dstT = entry->value;
1380
1381                         entry = pmap_find(env->proj_2_block, projF);
1382                         assert(entry);
1383                         dstF = entry->value;
1384
1385                         irn = new_r_Proj(block, cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1386                         dbg = get_irn_dbg_info(node);
1387                         irn = new_rd_Cond(dbg, block, irn);
1388
1389                         projHT = new_r_Proj(block, irn, mode_X, pn_Cond_true);
1390                         mark_irn_visited(projHT);
1391                         exchange(projT, projHT);
1392                         projT = projHT;
1393
1394                         projHF = new_r_Proj(block, irn, mode_X, pn_Cond_false);
1395                         mark_irn_visited(projHF);
1396
1397                         newbl_eq = new_r_Block(irg, 1, &projHF);
1398
1399                         irn = new_r_Proj(block, cmpH, mode_b, pn_Cmp_Eq);
1400                         irn = new_rd_Cond(dbg, newbl_eq, irn);
1401
1402                         proj = new_r_Proj(newbl_eq, irn, mode_X, pn_Cond_false);
1403                         mark_irn_visited(proj);
1404                         exchange(projF, proj);
1405                         projF = proj;
1406
1407                         proj = new_r_Proj(newbl_eq, irn, mode_X, pn_Cond_true);
1408                         mark_irn_visited(proj);
1409
1410                         newbl_l = new_r_Block(irg, 1, &proj);
1411
1412                         dbg   = get_irn_dbg_info(cmp);
1413                         cmpL = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word);
1414                         irn = new_r_Proj(newbl_l, cmpL, mode_b, pnc);
1415                         dbg = get_irn_dbg_info(node);
1416                         irn = new_rd_Cond(dbg, newbl_l, irn);
1417
1418                         proj = new_r_Proj(newbl_l, irn, mode_X, pn_Cond_true);
1419                         mark_irn_visited(proj);
1420                         add_block_cf_input(dstT, projT, proj);
1421
1422                         proj = new_r_Proj(newbl_l, irn, mode_X, pn_Cond_false);
1423                         mark_irn_visited(proj);
1424                         add_block_cf_input(dstF, projF, proj);
1425                 }  /* if */
1426
1427                 /* we have changed the control flow */
1428                 env->flags |= CF_CHANGED;
1429         } else {
1430                 idx = get_irn_idx(sel);
1431
1432                 if (env->entries[idx]) {
1433                         /*
1434                            Bad, a jump-table with double-word index.
1435                            This should not happen, but if it does we handle
1436                            it like a Conv were between (in other words, ignore
1437                            the high part.
1438                          */
1439
1440                         if (! env->entries[idx]->low_word) {
1441                                 /* not ready yet, wait */
1442                                 pdeq_putr(env->waitq, node);
1443                                 return;
1444                         }  /* if */
1445                         set_Cond_selector(node, env->entries[idx]->low_word);
1446                 }  /* if */
1447         }  /* if */
1448 }  /* lower_Cond */
1449
1450 /**
1451  * Translate a Conv to higher_signed
1452  */
1453 static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
1454         ir_node  *op    = get_Conv_op(node);
1455         ir_mode  *imode = get_irn_mode(op);
1456         ir_mode  *dst_mode_l = env->params->low_unsigned;
1457         ir_mode  *dst_mode_h = env->params->low_signed;
1458         int      idx = get_irn_idx(node);
1459         ir_graph *irg = current_ir_graph;
1460         ir_node  *block = get_nodes_block(node);
1461         dbg_info *dbg = get_irn_dbg_info(node);
1462
1463         assert(idx < env->n_entries);
1464
1465         if (mode_is_int(imode) || mode_is_reference(imode)) {
1466                 if (imode == env->params->high_unsigned) {
1467                         /* a Conv from Lu to Ls */
1468                         int op_idx = get_irn_idx(op);
1469
1470                         if (! env->entries[op_idx]->low_word) {
1471                                 /* not ready yet, wait */
1472                                 pdeq_putr(env->waitq, node);
1473                                 return;
1474                         }  /* if */
1475                         env->entries[idx]->low_word  = new_rd_Conv(dbg, block, env->entries[op_idx]->low_word,  dst_mode_l);
1476                         env->entries[idx]->high_word = new_rd_Conv(dbg, block, env->entries[op_idx]->high_word, dst_mode_h);
1477                 } else {
1478                         /* simple case: create a high word */
1479                         if (imode != dst_mode_l)
1480                                 op = new_rd_Conv(dbg, block, op, dst_mode_l);
1481
1482                         env->entries[idx]->low_word  = op;
1483
1484                         if (mode_is_signed(imode)) {
1485                                 ir_node *op_conv = new_rd_Conv(dbg, block, op, dst_mode_h);
1486                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, block, op_conv,
1487                                         new_Const_long(dst_mode_l, get_mode_size_bits(dst_mode_h) - 1), dst_mode_h);
1488                         } else {
1489                                 env->entries[idx]->high_word = new_Const(get_mode_null(dst_mode_h));
1490                         }  /* if */
1491                 }  /* if */
1492         } else {
1493                 ir_node *irn, *call;
1494                 ir_mode *omode = env->params->high_signed;
1495                 ir_type *mtp = get_conv_type(imode, omode, env);
1496
1497                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1498                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1499                 set_irn_pinned(call, get_irn_pinned(node));
1500                 irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
1501
1502                 env->entries[idx]->low_word  = new_r_Proj(block, irn, dst_mode_l, 0);
1503                 env->entries[idx]->high_word = new_r_Proj(block, irn, dst_mode_h, 1);
1504         }  /* if */
1505 }  /* lower_Conv_to_Ls */
1506
1507 /**
1508  * Translate a Conv to higher_unsigned
1509  */
1510 static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
1511         ir_node  *op    = get_Conv_op(node);
1512         ir_mode  *imode = get_irn_mode(op);
1513         ir_mode  *dst_mode = env->params->low_unsigned;
1514         int      idx = get_irn_idx(node);
1515         ir_graph *irg = current_ir_graph;
1516         ir_node  *block = get_nodes_block(node);
1517         dbg_info *dbg = get_irn_dbg_info(node);
1518
1519         assert(idx < env->n_entries);
1520
1521         if (mode_is_int(imode) || mode_is_reference(imode)) {
1522                 if (imode == env->params->high_signed) {
1523                         /* a Conv from Ls to Lu */
1524                         int op_idx = get_irn_idx(op);
1525
1526                         if (! env->entries[op_idx]->low_word) {
1527                                 /* not ready yet, wait */
1528                                 pdeq_putr(env->waitq, node);
1529                                 return;
1530                         }  /* if */
1531                         env->entries[idx]->low_word  = new_rd_Conv(dbg, block, env->entries[op_idx]->low_word, dst_mode);
1532                         env->entries[idx]->high_word = new_rd_Conv(dbg, block, env->entries[op_idx]->high_word, dst_mode);
1533                 } else {
1534                         /* simple case: create a high word */
1535                         if (imode != dst_mode)
1536                                 op = new_rd_Conv(dbg, block, op, dst_mode);
1537
1538                         env->entries[idx]->low_word  = op;
1539
1540                         if (mode_is_signed(imode)) {
1541                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, block, op,
1542                                         new_Const_long(dst_mode, get_mode_size_bits(dst_mode) - 1), dst_mode);
1543                         } else {
1544                                 env->entries[idx]->high_word = new_Const(get_mode_null(dst_mode));
1545                         }  /* if */
1546                 }  /* if */
1547         } else {
1548                 ir_node *irn, *call;
1549                 ir_mode *omode = env->params->high_unsigned;
1550                 ir_type *mtp = get_conv_type(imode, omode, env);
1551
1552                 /* do an intrinsic call */
1553                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1554                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1555                 set_irn_pinned(call, get_irn_pinned(node));
1556                 irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
1557
1558                 env->entries[idx]->low_word  = new_r_Proj(block, irn, dst_mode, 0);
1559                 env->entries[idx]->high_word = new_r_Proj(block, irn, dst_mode, 1);
1560         }  /* if */
1561 }  /* lower_Conv_to_Lu */
1562
1563 /**
1564  * Translate a Conv from higher_signed
1565  */
1566 static void lower_Conv_from_Ls(ir_node *node, lower_env_t *env) {
1567         ir_node  *op    = get_Conv_op(node);
1568         ir_mode  *omode = get_irn_mode(node);
1569         ir_node  *block = get_nodes_block(node);
1570         dbg_info *dbg = get_irn_dbg_info(node);
1571         int      idx = get_irn_idx(op);
1572         ir_graph *irg = current_ir_graph;
1573
1574         assert(idx < env->n_entries);
1575
1576         if (! env->entries[idx]->low_word) {
1577                 /* not ready yet, wait */
1578                 pdeq_putr(env->waitq, node);
1579                 return;
1580         }  /* if */
1581
1582         if (mode_is_int(omode) || mode_is_reference(omode)) {
1583                 op = env->entries[idx]->low_word;
1584
1585                 /* simple case: create a high word */
1586                 if (omode != env->params->low_signed)
1587                         op = new_rd_Conv(dbg, block, op, omode);
1588
1589                 set_Conv_op(node, op);
1590         } else {
1591                 ir_node *irn, *call, *in[2];
1592                 ir_mode *imode = env->params->high_signed;
1593                 ir_type *mtp = get_conv_type(imode, omode, env);
1594
1595                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1596                 in[0] = env->entries[idx]->low_word;
1597                 in[1] = env->entries[idx]->high_word;
1598
1599                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1600                 set_irn_pinned(call, get_irn_pinned(node));
1601                 irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
1602
1603                 exchange(node, new_r_Proj(block, irn, omode, 0));
1604         }  /* if */
1605 }  /* lower_Conv_from_Ls */
1606
1607 /**
1608  * Translate a Conv from higher_unsigned
1609  */
1610 static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
1611         ir_node  *op    = get_Conv_op(node);
1612         ir_mode  *omode = get_irn_mode(node);
1613         ir_node  *block = get_nodes_block(node);
1614         dbg_info *dbg = get_irn_dbg_info(node);
1615         int      idx = get_irn_idx(op);
1616         ir_graph *irg = current_ir_graph;
1617
1618         assert(idx < env->n_entries);
1619
1620         if (! env->entries[idx]->low_word) {
1621                 /* not ready yet, wait */
1622                 pdeq_putr(env->waitq, node);
1623                 return;
1624         }  /* if */
1625
1626         if (mode_is_int(omode) || mode_is_reference(omode)) {
1627                 op = env->entries[idx]->low_word;
1628
1629                 /* simple case: create a high word */
1630                 if (omode != env->params->low_unsigned)
1631                         op = new_rd_Conv(dbg, block, op, omode);
1632
1633                 set_Conv_op(node, op);
1634         } else {
1635                 ir_node *irn, *call, *in[2];
1636                 ir_mode *imode = env->params->high_unsigned;
1637                 ir_type *mtp = get_conv_type(imode, omode, env);
1638
1639                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1640                 in[0] = env->entries[idx]->low_word;
1641                 in[1] = env->entries[idx]->high_word;
1642
1643                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1644                 set_irn_pinned(call, get_irn_pinned(node));
1645                 irn = new_r_Proj(block, call, mode_T, pn_Call_T_result);
1646
1647                 exchange(node, new_r_Proj(block, irn, omode, 0));
1648         }  /* if */
1649 }  /* lower_Conv_from_Lu */
1650
1651 /**
1652  * Translate a Conv.
1653  */
1654 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env) {
1655         mode = get_irn_mode(node);
1656
1657         if (mode == env->params->high_signed) {
1658                 lower_Conv_to_Ls(node, env);
1659         } else if (mode == env->params->high_unsigned) {
1660                 lower_Conv_to_Lu(node, env);
1661         } else {
1662                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1663
1664                 if (mode == env->params->high_signed) {
1665                         lower_Conv_from_Ls(node, env);
1666                 } else if (mode == env->params->high_unsigned) {
1667                         lower_Conv_from_Lu(node, env);
1668                 }  /* if */
1669         }  /* if */
1670 }  /* lower_Conv */
1671
1672 /**
1673  * Lower the method type.
1674  *
1675  * @param mtp  the method type to lower
1676  * @param ent  the lower environment
1677  *
1678  * @return the lowered type
1679  */
1680 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
1681         pmap_entry *entry;
1682         ident      *id, *lid;
1683         ir_type    *res, *value_type;
1684
1685         if (is_lowered_type(mtp))
1686                 return mtp;
1687
1688         entry = pmap_find(lowered_type, mtp);
1689         if (! entry) {
1690                 int i, n, r, n_param, n_res;
1691
1692                 /* count new number of params */
1693                 n_param = n = get_method_n_params(mtp);
1694                 for (i = n_param - 1; i >= 0; --i) {
1695                         ir_type *tp = get_method_param_type(mtp, i);
1696
1697                         if (is_Primitive_type(tp)) {
1698                                 ir_mode *mode = get_type_mode(tp);
1699
1700                                 if (mode == env->params->high_signed ||
1701                                         mode == env->params->high_unsigned)
1702                                         ++n_param;
1703                         }  /* if */
1704                 }  /* for */
1705
1706                 /* count new number of results */
1707                 n_res = r = get_method_n_ress(mtp);
1708                 for (i = n_res - 1; i >= 0; --i) {
1709                         ir_type *tp = get_method_res_type(mtp, i);
1710
1711                         if (is_Primitive_type(tp)) {
1712                                 ir_mode *mode = get_type_mode(tp);
1713
1714                                 if (mode == env->params->high_signed ||
1715                                         mode == env->params->high_unsigned)
1716                                         ++n_res;
1717                         }  /* if */
1718                 }  /* for */
1719
1720                 id  = id_mangle_u(new_id_from_chars("L", 1), get_type_ident(mtp));
1721                 res = new_type_method(id, n_param, n_res);
1722
1723                 /* set param types and result types */
1724                 for (i = n_param = 0; i < n; ++i) {
1725                         ir_type *tp = get_method_param_type(mtp, i);
1726
1727                         if (is_Primitive_type(tp)) {
1728                                 ir_mode *mode = get_type_mode(tp);
1729
1730                                 if (mode == env->params->high_signed) {
1731                                         set_method_param_type(res, n_param++, tp_u);
1732                                         set_method_param_type(res, n_param++, tp_s);
1733                                 } else if (mode == env->params->high_unsigned) {
1734                                         set_method_param_type(res, n_param++, tp_u);
1735                                         set_method_param_type(res, n_param++, tp_u);
1736                                 } else {
1737                                         set_method_param_type(res, n_param++, tp);
1738                                 }  /* if */
1739                         } else {
1740                                 set_method_param_type(res, n_param++, tp);
1741                         }  /* if */
1742                 }  /* for */
1743                 for (i = n_res = 0; i < r; ++i) {
1744                         ir_type *tp = get_method_res_type(mtp, i);
1745
1746                         if (is_Primitive_type(tp)) {
1747                                 ir_mode *mode = get_type_mode(tp);
1748
1749                                 if (mode == env->params->high_signed) {
1750                                         set_method_res_type(res, n_res++, tp_u);
1751                                         set_method_res_type(res, n_res++, tp_s);
1752                                 } else if (mode == env->params->high_unsigned) {
1753                                         set_method_res_type(res, n_res++, tp_u);
1754                                         set_method_res_type(res, n_res++, tp_u);
1755                                 } else {
1756                                         set_method_res_type(res, n_res++, tp);
1757                                 }  /* if */
1758                         } else {
1759                                 set_method_res_type(res, n_res++, tp);
1760                         }  /* if */
1761                 }  /* for */
1762                 set_lowered_type(mtp, res);
1763                 pmap_insert(lowered_type, mtp, res);
1764
1765                 value_type = get_method_value_param_type(mtp);
1766                 if (value_type != NULL) {
1767                         /* this creates a new value parameter type */
1768                         (void)get_method_value_param_ent(res, 0);
1769
1770                         /* set new param positions */
1771                         for (i = n_param = 0; i < n; ++i) {
1772                                 ir_type   *tp  = get_method_param_type(mtp, i);
1773                                 ident     *id  = get_method_param_ident(mtp, i);
1774                                 ir_entity *ent = get_method_value_param_ent(mtp, i);
1775
1776                                 set_entity_link(ent, INT_TO_PTR(n_param));
1777                                 if (is_Primitive_type(tp)) {
1778                                         ir_mode *mode = get_type_mode(tp);
1779
1780                                         if (mode == env->params->high_signed || mode == env->params->high_unsigned) {
1781                                                 if (id != NULL) {
1782                                                         lid = id_mangle(id, env->first_id);
1783                                                         set_method_param_ident(res, n_param, lid);
1784                                                         set_entity_ident(get_method_value_param_ent(res, n_param), lid);
1785                                                         lid = id_mangle(id, env->next_id);
1786                                                         set_method_param_ident(res, n_param + 1, lid);
1787                                                         set_entity_ident(get_method_value_param_ent(res, n_param + 1), lid);
1788                                                 }  /* if */
1789                                                 n_param += 2;
1790                                                 continue;
1791                                         }  /* if */
1792                                 }  /* if */
1793                                 if (id != NULL) {
1794                                         set_method_param_ident(res, n_param, id);
1795                                         set_entity_ident(get_method_value_param_ent(res, n_param), id);
1796                                 }  /* if */
1797                                 ++n_param;
1798                         }  /* for */
1799
1800                         set_lowered_type(value_type, get_method_value_param_type(res));
1801                 }  /* if */
1802         } else {
1803                 res = entry->value;
1804         }  /* if */
1805         return res;
1806 }  /* lower_mtp */
1807
1808 /**
1809  * Translate a Return.
1810  */
1811 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
1812         ir_graph  *irg = current_ir_graph;
1813         ir_entity *ent = get_irg_entity(irg);
1814         ir_type   *mtp = get_entity_type(ent);
1815         ir_node   **in;
1816         int       i, j, n, idx;
1817         int       need_conv = 0;
1818         (void) mode;
1819
1820         /* check if this return must be lowered */
1821         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1822                 ir_node *pred = get_Return_res(node, i);
1823                 ir_mode *mode = get_irn_op_mode(pred);
1824
1825                 if (mode == env->params->high_signed ||
1826                         mode == env->params->high_unsigned) {
1827                         idx = get_irn_idx(pred);
1828                         if (! env->entries[idx]->low_word) {
1829                                 /* not ready yet, wait */
1830                                 pdeq_putr(env->waitq, node);
1831                                 return;
1832                         }  /* if */
1833                         need_conv = 1;
1834                 }  /* if */
1835         }  /* for */
1836         if (! need_conv)
1837                 return;
1838
1839         ent = get_irg_entity(irg);
1840         mtp = get_entity_type(ent);
1841
1842         mtp = lower_mtp(mtp, env);
1843         set_entity_type(ent, mtp);
1844
1845         /* create a new in array */
1846         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1847         in[0] = get_Return_mem(node);
1848
1849         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1850                 ir_node *pred = get_Return_res(node, i);
1851
1852                 idx = get_irn_idx(pred);
1853                 assert(idx < env->n_entries);
1854
1855                 if (env->entries[idx]) {
1856                         in[++j] = env->entries[idx]->low_word;
1857                         in[++j] = env->entries[idx]->high_word;
1858                 } else {
1859                         in[++j] = pred;
1860                 }  /* if */
1861         }  /* for */
1862
1863         set_irn_in(node, j+1, in);
1864 }  /* lower_Return */
1865
1866 /**
1867  * Translate the parameters.
1868  */
1869 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env) {
1870         ir_graph  *irg = get_irn_irg(node);
1871         ir_entity *ent = get_irg_entity(irg);
1872         ir_type   *tp  = get_entity_type(ent);
1873         ir_type   *mtp;
1874         long      *new_projs;
1875         int       i, j, n_params, rem;
1876         ir_node   *proj, *args;
1877         (void) mode;
1878
1879         if (is_lowered_type(tp)) {
1880                 mtp = get_associated_type(tp);
1881         } else {
1882                 mtp = tp;
1883         }  /* if */
1884         assert(! is_lowered_type(mtp));
1885
1886         n_params = get_method_n_params(mtp);
1887         if (n_params <= 0)
1888                 return;
1889
1890         NEW_ARR_A(long, new_projs, n_params);
1891
1892         /* first check if we have parameters that must be fixed */
1893         for (i = j = 0; i < n_params; ++i, ++j) {
1894                 ir_type *tp = get_method_param_type(mtp, i);
1895
1896                 new_projs[i] = j;
1897                 if (is_Primitive_type(tp)) {
1898                         ir_mode *mode = get_type_mode(tp);
1899
1900                         if (mode == env->params->high_signed ||
1901                                 mode == env->params->high_unsigned)
1902                                 ++j;
1903                 }  /* if */
1904         }  /* for */
1905         if (i == j)
1906                 return;
1907
1908         mtp = lower_mtp(mtp, env);
1909         set_entity_type(ent, mtp);
1910
1911         /* switch off optimization for new Proj nodes or they might be CSE'ed
1912            with not patched one's */
1913         rem = get_optimize();
1914         set_optimize(0);
1915
1916         /* ok, fix all Proj's and create new ones */
1917         args = get_irg_args(irg);
1918         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1919                 ir_node *pred = get_Proj_pred(proj);
1920                 long proj_nr;
1921                 int idx;
1922                 ir_mode *mode;
1923                 dbg_info *dbg;
1924
1925                 /* do not visit this node again */
1926                 mark_irn_visited(proj);
1927
1928                 if (pred != args)
1929                         continue;
1930
1931                 proj_nr = get_Proj_proj(proj);
1932                 set_Proj_proj(proj, new_projs[proj_nr]);
1933
1934                 idx = get_irn_idx(proj);
1935                 if (env->entries[idx]) {
1936                         ir_mode *low_mode = env->params->low_unsigned;
1937
1938                         mode = get_irn_mode(proj);
1939
1940                         if (mode == env->params->high_signed) {
1941                                 mode = env->params->low_signed;
1942                         } else {
1943                                 mode = env->params->low_unsigned;
1944                         }  /* if */
1945
1946                         dbg = get_irn_dbg_info(proj);
1947                         env->entries[idx]->low_word  =
1948                                 new_rd_Proj(dbg, get_nodes_block(proj), args, low_mode, new_projs[proj_nr]);
1949                         env->entries[idx]->high_word =
1950                                 new_rd_Proj(dbg, get_nodes_block(proj), args, mode, new_projs[proj_nr] + 1);
1951                 }  /* if */
1952         }  /* for */
1953         set_optimize(rem);
1954 }  /* lower_Start */
1955
1956 /**
1957  * Translate a Call.
1958  */
1959 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
1960         ir_type  *tp = get_Call_type(node);
1961         ir_type  *call_tp;
1962         ir_node  **in, *proj, *results;
1963         int      n_params, n_res, need_lower = 0;
1964         int      i, j;
1965         long     *res_numbers = NULL;
1966         (void) mode;
1967
1968         if (is_lowered_type(tp)) {
1969                 call_tp = get_associated_type(tp);
1970         } else {
1971                 call_tp = tp;
1972         }  /* if */
1973
1974         assert(! is_lowered_type(call_tp));
1975
1976         n_params = get_method_n_params(call_tp);
1977         for (i = 0; i < n_params; ++i) {
1978                 ir_type *tp = get_method_param_type(call_tp, i);
1979
1980                 if (is_Primitive_type(tp)) {
1981                         ir_mode *mode = get_type_mode(tp);
1982
1983                         if (mode == env->params->high_signed ||
1984                                 mode == env->params->high_unsigned) {
1985                                 need_lower = 1;
1986                                 break;
1987                         }  /* if */
1988                 }  /* if */
1989         }  /* for */
1990         n_res = get_method_n_ress(call_tp);
1991         if (n_res > 0) {
1992                 NEW_ARR_A(long, res_numbers, n_res);
1993
1994                 for (i = j = 0; i < n_res; ++i, ++j) {
1995                         ir_type *tp = get_method_res_type(call_tp, i);
1996
1997                         res_numbers[i] = j;
1998                         if (is_Primitive_type(tp)) {
1999                                 ir_mode *mode = get_type_mode(tp);
2000
2001                                 if (mode == env->params->high_signed ||
2002                                         mode == env->params->high_unsigned) {
2003                                         need_lower = 1;
2004                                         ++j;
2005                                 }  /* if */
2006                         }  /* if */
2007                 }  /* for */
2008         }  /* if */
2009
2010         if (! need_lower)
2011                 return;
2012
2013         /* let's lower it */
2014         call_tp = lower_mtp(call_tp, env);
2015         set_Call_type(node, call_tp);
2016
2017         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
2018
2019         in[0] = get_Call_mem(node);
2020         in[1] = get_Call_ptr(node);
2021
2022         for (j = 2, i = 0; i < n_params; ++i) {
2023                 ir_node *pred = get_Call_param(node, i);
2024                 int     idx = get_irn_idx(pred);
2025
2026                 if (env->entries[idx]) {
2027                         if (! env->entries[idx]->low_word) {
2028                                 /* not ready yet, wait */
2029                                 pdeq_putr(env->waitq, node);
2030                                 return;
2031                         }
2032                         in[j++] = env->entries[idx]->low_word;
2033                         in[j++] = env->entries[idx]->high_word;
2034                 } else {
2035                         in[j++] = pred;
2036                 }  /* if */
2037         }  /* for */
2038
2039         set_irn_in(node, j, in);
2040
2041         /* fix the results */
2042         results = NULL;
2043         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
2044                 long proj_nr = get_Proj_proj(proj);
2045
2046                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
2047                         /* found the result proj */
2048                         results = proj;
2049                         break;
2050                 }  /* if */
2051         }  /* for */
2052
2053         if (results) {          /* there are results */
2054                 int rem = get_optimize();
2055
2056                 /* switch off optimization for new Proj nodes or they might be CSE'ed
2057                    with not patched one's */
2058                 set_optimize(0);
2059                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
2060                         if (get_Proj_pred(proj) == results) {
2061                                 long proj_nr = get_Proj_proj(proj);
2062                                 int idx;
2063
2064                                 /* found a result */
2065                                 set_Proj_proj(proj, res_numbers[proj_nr]);
2066                                 idx = get_irn_idx(proj);
2067                                 if (env->entries[idx]) {
2068                                         ir_mode *mode = get_irn_mode(proj);
2069                                         ir_mode *low_mode = env->params->low_unsigned;
2070                                         dbg_info *dbg;
2071
2072                                         if (mode == env->params->high_signed) {
2073                                                 mode = env->params->low_signed;
2074                                         } else {
2075                                                 mode = env->params->low_unsigned;
2076                                         }  /* if */
2077
2078                                         dbg = get_irn_dbg_info(proj);
2079                                         env->entries[idx]->low_word  =
2080                                                 new_rd_Proj(dbg, get_nodes_block(proj), results, low_mode, res_numbers[proj_nr]);
2081                                         env->entries[idx]->high_word =
2082                                                 new_rd_Proj(dbg, get_nodes_block(proj), results, mode, res_numbers[proj_nr] + 1);
2083                                 }  /* if */
2084                                 mark_irn_visited(proj);
2085                         }  /* if */
2086                 }  /* for */
2087                 set_optimize(rem);
2088         }
2089 }  /* lower_Call */
2090
2091 /**
2092  * Translate an Unknown into two.
2093  */
2094 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env) {
2095         int      idx = get_irn_idx(node);
2096         ir_graph *irg = get_irn_irg(node);
2097         ir_mode  *low_mode = env->params->low_unsigned;
2098
2099         env->entries[idx]->low_word  = new_r_Unknown(irg, low_mode);
2100         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2101 }  /* lower_Unknown */
2102
2103 /**
2104  * Translate a Phi.
2105  *
2106  * First step: just create two templates
2107  */
2108 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
2109         ir_mode  *mode_l = env->params->low_unsigned;
2110         ir_graph *irg = get_irn_irg(phi);
2111         ir_node  *block, *unk_l, *unk_h, *phi_l, *phi_h;
2112         ir_node  **inl, **inh;
2113         dbg_info *dbg;
2114         int      idx, i, arity = get_Phi_n_preds(phi);
2115         int      enq = 0;
2116
2117         idx = get_irn_idx(phi);
2118         if (env->entries[idx]->low_word) {
2119                 /* Phi nodes already build, check for inputs */
2120                 ir_node *phil = env->entries[idx]->low_word;
2121                 ir_node *phih = env->entries[idx]->high_word;
2122
2123                 for (i = 0; i < arity; ++i) {
2124                         ir_node *pred = get_Phi_pred(phi, i);
2125                         int     idx = get_irn_idx(pred);
2126
2127                         if (env->entries[idx]->low_word) {
2128                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2129                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2130                         } else {
2131                                 /* still not ready */
2132                                 pdeq_putr(env->waitq, phi);
2133                                 return;
2134                         }  /* if */
2135                 }  /* for */
2136         }  /* if */
2137
2138         /* first create a new in array */
2139         NEW_ARR_A(ir_node *, inl, arity);
2140         NEW_ARR_A(ir_node *, inh, arity);
2141         unk_l = new_r_Unknown(irg, mode_l);
2142         unk_h = new_r_Unknown(irg, mode);
2143
2144         for (i = 0; i < arity; ++i) {
2145                 ir_node *pred = get_Phi_pred(phi, i);
2146                 int     idx = get_irn_idx(pred);
2147
2148                 if (env->entries[idx]->low_word) {
2149                         inl[i] = env->entries[idx]->low_word;
2150                         inh[i] = env->entries[idx]->high_word;
2151                 } else {
2152                         inl[i] = unk_l;
2153                         inh[i] = unk_h;
2154                         enq = 1;
2155                 }  /* if */
2156         }  /* for */
2157
2158         dbg   = get_irn_dbg_info(phi);
2159         block = get_nodes_block(phi);
2160
2161         idx = get_irn_idx(phi);
2162         assert(idx < env->n_entries);
2163         env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, block, arity, inl, mode_l);
2164         env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, block, arity, inh, mode);
2165
2166         /* Don't forget to link the new Phi nodes into the block.
2167          * Beware that some Phis might be optimized away. */
2168         if (is_Phi(phi_l))
2169                 add_Block_phi(block, phi_l);
2170         if (is_Phi(phi_h))
2171                 add_Block_phi(block, phi_h);
2172
2173         if (enq) {
2174                 /* not yet finished */
2175                 pdeq_putr(env->waitq, phi);
2176         }  /* if */
2177 }  /* lower_Phi */
2178
2179 /**
2180  * Translate a Mux.
2181  */
2182 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env) {
2183         ir_node  *block, *val;
2184         ir_node  *true_l, *true_h, *false_l, *false_h, *sel;
2185         dbg_info *dbg;
2186         int      idx;
2187
2188         val = get_Mux_true(mux);
2189         idx = get_irn_idx(val);
2190         if (env->entries[idx]->low_word) {
2191                 /* Values already build */
2192                 true_l = env->entries[idx]->low_word;
2193                 true_h = env->entries[idx]->high_word;
2194         } else {
2195                 /* still not ready */
2196                 pdeq_putr(env->waitq, mux);
2197                 return;
2198         }  /* if */
2199
2200         val = get_Mux_false(mux);
2201         idx = get_irn_idx(val);
2202         if (env->entries[idx]->low_word) {
2203                 /* Values already build */
2204                 false_l = env->entries[idx]->low_word;
2205                 false_h = env->entries[idx]->high_word;
2206         } else {
2207                 /* still not ready */
2208                 pdeq_putr(env->waitq, mux);
2209                 return;
2210         }  /* if */
2211
2212
2213         sel = get_Mux_sel(mux);
2214
2215         dbg   = get_irn_dbg_info(mux);
2216         block = get_nodes_block(mux);
2217
2218         idx = get_irn_idx(mux);
2219         assert(idx < env->n_entries);
2220         env->entries[idx]->low_word  = new_rd_Mux(dbg, block, sel, false_l, true_l, mode);
2221         env->entries[idx]->high_word = new_rd_Mux(dbg, block, sel, false_h, true_h, mode);
2222 }  /* lower_Mux */
2223
2224 /**
2225  * Translate an ASM node.
2226  */
2227 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env) {
2228         ir_mode *his = env->params->high_signed;
2229         ir_mode *hiu = env->params->high_unsigned;
2230         int      i;
2231         ir_node *n;
2232
2233         (void)mode;
2234
2235         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2236                 ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
2237                 if (op_mode == his || op_mode == hiu) {
2238                         panic("lowering ASM unimplemented");
2239                 }  /* if */
2240         }  /* for */
2241
2242         for (n = asmn;;) {
2243                 ir_mode *proj_mode;
2244
2245                 n = get_irn_link(n);
2246                 if (n == NULL)
2247                         break;
2248
2249                 proj_mode = get_irn_mode(n);
2250                 if (proj_mode == his || proj_mode == hiu) {
2251                         panic("lowering ASM unimplemented");
2252                 }  /* if */
2253         }  /* for */
2254 }  /* lower_ASM */
2255
2256 /**
2257  * Translate a Sel node.
2258  */
2259 static void lower_Sel(ir_node *sel, ir_mode *mode, lower_env_t *env) {
2260         (void) mode;
2261
2262         /* we must only lower value parameter Sels if we change the
2263            value parameter type. */
2264         if (env->value_param_tp != NULL) {
2265                 ir_entity *ent = get_Sel_entity(sel);
2266             if (get_entity_owner(ent) == env->value_param_tp) {
2267                         int pos = PTR_TO_INT(get_entity_link(ent));
2268
2269                         ent = get_method_value_param_ent(env->l_mtp, pos);
2270                         set_Sel_entity(sel, ent);
2271                 }  /* if */
2272         }  /* if */
2273 }  /* lower_Sel */
2274
2275 /**
2276  * check for opcodes that must always be lowered.
2277  */
2278 static int always_lower(ir_opcode code) {
2279         switch (code) {
2280         case iro_ASM:
2281         case iro_Proj:
2282         case iro_Start:
2283         case iro_Call:
2284         case iro_Return:
2285         case iro_Cond:
2286         case iro_Conv:
2287         case iro_Sel:
2288                 return 1;
2289         default:
2290                 return 0;
2291         }  /* switch */
2292 }  /* always_lower */
2293
2294 /**
2295  * lower boolean Proj(Cmp)
2296  */
2297 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env) {
2298         int      lidx, ridx;
2299         ir_node  *l, *r, *low, *high, *t, *res;
2300         pn_Cmp   pnc;
2301         ir_node  *blk;
2302         dbg_info *db;
2303
2304         l    = get_Cmp_left(cmp);
2305         lidx = get_irn_idx(l);
2306         if (! env->entries[lidx]->low_word) {
2307                 /* still not ready */
2308                 return NULL;
2309         }  /* if */
2310
2311         r    = get_Cmp_right(cmp);
2312         ridx = get_irn_idx(r);
2313         if (! env->entries[ridx]->low_word) {
2314                 /* still not ready */
2315                 return NULL;
2316         }  /* if */
2317
2318         pnc  = get_Proj_proj(proj);
2319         blk  = get_nodes_block(cmp);
2320         db   = get_irn_dbg_info(cmp);
2321         low  = new_rd_Cmp(db, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2322         high = new_rd_Cmp(db, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2323
2324         if (pnc == pn_Cmp_Eq) {
2325                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2326                 res = new_rd_And(db, blk,
2327                         new_r_Proj(blk, low, mode_b, pnc),
2328                         new_r_Proj(blk, high, mode_b, pnc),
2329                         mode_b);
2330         } else if (pnc == pn_Cmp_Lg) {
2331                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2332                 res = new_rd_Or(db, blk,
2333                         new_r_Proj(blk, low, mode_b, pnc),
2334                         new_r_Proj(blk, high, mode_b, pnc),
2335                         mode_b);
2336         } else {
2337                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2338                 t = new_rd_And(db, blk,
2339                         new_r_Proj(blk, low, mode_b, pnc),
2340                         new_r_Proj(blk, high, mode_b, pn_Cmp_Eq),
2341                         mode_b);
2342                 res = new_rd_Or(db, blk,
2343                         new_r_Proj(blk, high, mode_b, pnc & ~pn_Cmp_Eq),
2344                         t,
2345                         mode_b);
2346         }  /* if */
2347         return res;
2348 }  /* lower_boolean_Proj_Cmp */
2349
2350 /**
2351  * The type of a lower function.
2352  *
2353  * @param node   the node to be lowered
2354  * @param mode   the low mode for the destination node
2355  * @param env    the lower environment
2356  */
2357 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2358
2359 /**
2360  * Lower a node.
2361  */
2362 static void lower_ops(ir_node *node, void *env)
2363 {
2364         lower_env_t  *lenv = env;
2365         node_entry_t *entry;
2366         int          idx = get_irn_idx(node);
2367         ir_mode      *mode = get_irn_mode(node);
2368
2369         if (mode == mode_b || is_Mux(node) || is_Conv(node)) {
2370                 int i;
2371
2372                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2373                         ir_node *proj = get_irn_n(node, i);
2374
2375                         if (is_Proj(proj)) {
2376                                 ir_node *cmp = get_Proj_pred(proj);
2377
2378                                 if (is_Cmp(cmp)) {
2379                                         ir_node *arg = get_Cmp_left(cmp);
2380
2381                                         mode = get_irn_mode(arg);
2382                                         if (mode == lenv->params->high_signed ||
2383                                                 mode == lenv->params->high_unsigned) {
2384                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2385
2386                                                 if (res == NULL) {
2387                                                         /* could not lower because predecessors not ready */
2388                                                         waitq_put(lenv->waitq, node);
2389                                                         return;
2390                                                 }  /* if */
2391                                                 set_irn_n(node, i, res);
2392                                         }  /* if */
2393                                 }  /* if */
2394                         }  /* if */
2395                 }  /* for */
2396         }  /* if */
2397
2398         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2399         if (entry || always_lower(get_irn_opcode(node))) {
2400                 ir_op      *op = get_irn_op(node);
2401                 lower_func func = (lower_func)op->ops.generic;
2402
2403                 if (func) {
2404                         mode = get_irn_op_mode(node);
2405
2406                         if (mode == lenv->params->high_signed)
2407                                 mode = lenv->params->low_signed;
2408                         else
2409                                 mode = lenv->params->low_unsigned;
2410
2411                         DB((dbg, LEVEL_1, "  %+F\n", node));
2412                         func(node, mode, lenv);
2413                 }  /* if */
2414         }  /* if */
2415 }  /* lower_ops */
2416
2417 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2418
2419 /**
2420  * Compare two op_mode_entry_t's.
2421  */
2422 static int cmp_op_mode(const void *elt, const void *key, size_t size) {
2423         const op_mode_entry_t *e1 = elt;
2424         const op_mode_entry_t *e2 = key;
2425         (void) size;
2426
2427         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2428 }  /* cmp_op_mode */
2429
2430 /**
2431  * Compare two conv_tp_entry_t's.
2432  */
2433 static int cmp_conv_tp(const void *elt, const void *key, size_t size) {
2434         const conv_tp_entry_t *e1 = elt;
2435         const conv_tp_entry_t *e2 = key;
2436         (void) size;
2437
2438         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2439 }  /* cmp_conv_tp */
2440
2441 /**
2442  * Enter a lowering function into an ir_op.
2443  */
2444 static void enter_lower_func(ir_op *op, lower_func func) {
2445         op->ops.generic = (op_func)func;
2446 }  /* enter_lower_func */
2447
2448 /**
2449  * Returns non-zero if a method type must be lowered.
2450  *
2451  * @param mtp  the method type
2452  */
2453 static int mtp_must_to_lowered(ir_type *mtp, lower_env_t *env) {
2454         int i, n_params;
2455
2456         n_params = get_method_n_params(mtp);
2457         if (n_params <= 0)
2458                 return 0;
2459
2460         /* first check if we have parameters that must be fixed */
2461         for (i = 0; i < n_params; ++i) {
2462                 ir_type *tp = get_method_param_type(mtp, i);
2463
2464                 if (is_Primitive_type(tp)) {
2465                         ir_mode *mode = get_type_mode(tp);
2466
2467                         if (mode == env->params->high_signed ||
2468                                 mode == env->params->high_unsigned)
2469                                 return 1;
2470                 }  /* if */
2471         }  /* for */
2472         return 0;
2473 }  /* mtp_must_to_lowered */
2474
2475 /*
2476  * Do the lowering.
2477  */
2478 void lower_dw_ops(const lwrdw_param_t *param)
2479 {
2480         lower_env_t lenv;
2481         int         i;
2482         ir_graph    *rem;
2483
2484         if (! param)
2485                 return;
2486
2487         if (! param->enable)
2488                 return;
2489
2490         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2491
2492         assert(2 * get_mode_size_bits(param->low_signed)   == get_mode_size_bits(param->high_signed));
2493         assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
2494         assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
2495
2496         /* create the necessary maps */
2497         if (! prim_types)
2498                 prim_types = pmap_create();
2499         if (! intrinsic_fkt)
2500                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2501         if (! conv_types)
2502                 conv_types = new_set(cmp_conv_tp, 16);
2503         if (! lowered_type)
2504                 lowered_type = pmap_create();
2505
2506         /* create a primitive unsigned and signed type */
2507         if (! tp_u)
2508                 tp_u = get_primitive_type(param->low_unsigned);
2509         if (! tp_s)
2510                 tp_s = get_primitive_type(param->low_signed);
2511
2512         /* create method types for the created binop calls */
2513         if (! binop_tp_u) {
2514                 binop_tp_u = new_type_method(IDENT("binop_u_intrinsic"), 4, 2);
2515                 set_method_param_type(binop_tp_u, 0, tp_u);
2516                 set_method_param_type(binop_tp_u, 1, tp_u);
2517                 set_method_param_type(binop_tp_u, 2, tp_u);
2518                 set_method_param_type(binop_tp_u, 3, tp_u);
2519                 set_method_res_type(binop_tp_u, 0, tp_u);
2520                 set_method_res_type(binop_tp_u, 1, tp_u);
2521         }  /* if */
2522         if (! binop_tp_s) {
2523                 binop_tp_s = new_type_method(IDENT("binop_s_intrinsic"), 4, 2);
2524                 set_method_param_type(binop_tp_s, 0, tp_u);
2525                 set_method_param_type(binop_tp_s, 1, tp_s);
2526                 set_method_param_type(binop_tp_s, 2, tp_u);
2527                 set_method_param_type(binop_tp_s, 3, tp_s);
2528                 set_method_res_type(binop_tp_s, 0, tp_u);
2529                 set_method_res_type(binop_tp_s, 1, tp_s);
2530         }  /* if */
2531         if (! shiftop_tp_u) {
2532                 shiftop_tp_u = new_type_method(IDENT("shiftop_u_intrinsic"), 3, 2);
2533                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2534                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2535                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2536                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2537                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2538         }  /* if */
2539         if (! shiftop_tp_s) {
2540                 shiftop_tp_s = new_type_method(IDENT("shiftop_s_intrinsic"), 3, 2);
2541                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2542                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2543                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2544                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2545                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2546         }  /* if */
2547         if (! unop_tp_u) {
2548                 unop_tp_u = new_type_method(IDENT("unop_u_intrinsic"), 2, 2);
2549                 set_method_param_type(unop_tp_u, 0, tp_u);
2550                 set_method_param_type(unop_tp_u, 1, tp_u);
2551                 set_method_res_type(unop_tp_u, 0, tp_u);
2552                 set_method_res_type(unop_tp_u, 1, tp_u);
2553         }  /* if */
2554         if (! unop_tp_s) {
2555                 unop_tp_s = new_type_method(IDENT("unop_s_intrinsic"), 2, 2);
2556                 set_method_param_type(unop_tp_s, 0, tp_u);
2557                 set_method_param_type(unop_tp_s, 1, tp_s);
2558                 set_method_res_type(unop_tp_s, 0, tp_u);
2559                 set_method_res_type(unop_tp_s, 1, tp_s);
2560         }  /* if */
2561
2562         lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), param->low_unsigned);
2563         lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), param->low_unsigned);
2564         lenv.waitq         = new_pdeq();
2565         lenv.params        = param;
2566         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
2567         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
2568
2569         /* first clear the generic function pointer for all ops */
2570         clear_irp_opcodes_generic_func();
2571
2572 #define LOWER2(op, fkt)   enter_lower_func(op_##op, fkt)
2573 #define LOWER(op)         LOWER2(op, lower_##op)
2574 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2575 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2576
2577         /* the table of all operations that must be lowered follows */
2578         LOWER(ASM);
2579         LOWER(Load);
2580         LOWER(Store);
2581         LOWER(Const);
2582         LOWER(And);
2583         LOWER(Or);
2584         LOWER(Eor);
2585         LOWER(Not);
2586         LOWER(Cond);
2587         LOWER(Return);
2588         LOWER(Call);
2589         LOWER(Unknown);
2590         LOWER(Phi);
2591         LOWER(Mux);
2592         LOWER(Start);
2593
2594         LOWER_BIN(Add);
2595         LOWER_BIN(Sub);
2596         LOWER_BIN(Mul);
2597         LOWER(Shl);
2598         LOWER(Shr);
2599         LOWER(Shrs);
2600         LOWER(Rotl);
2601         LOWER(DivMod);
2602         LOWER(Div);
2603         LOWER(Mod);
2604         LOWER(Sel);
2605         LOWER_UN(Abs);
2606         LOWER_UN(Minus);
2607
2608         LOWER(Conv);
2609
2610 #undef LOWER_UN
2611 #undef LOWER_BIN
2612 #undef LOWER
2613 #undef LOWER2
2614
2615         /* transform all graphs */
2616         rem = current_ir_graph;
2617         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2618                 ir_graph  *irg = get_irp_irg(i);
2619                 ir_entity *ent;
2620                 ir_type   *mtp;
2621                 int n_idx;
2622
2623                 obstack_init(&lenv.obst);
2624
2625                 n_idx = get_irg_last_idx(irg);
2626                 n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2627                 lenv.n_entries = n_idx;
2628                 lenv.entries   = NEW_ARR_F(node_entry_t *, n_idx);
2629                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2630
2631                 lenv.l_mtp        = NULL;
2632                 lenv.flags        = 0;
2633                 lenv.proj_2_block = pmap_create();
2634                 lenv.value_param_tp = NULL;
2635                 ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2636
2637                 ent = get_irg_entity(irg);
2638                 mtp = get_entity_type(ent);
2639
2640                 if (mtp_must_to_lowered(mtp, &lenv)) {
2641                         ir_type *ltp = lower_mtp(mtp, &lenv);
2642                         lenv.flags |= MUST_BE_LOWERED;
2643                         set_entity_type(ent, ltp);
2644                         lenv.l_mtp = ltp;
2645                         lenv.value_param_tp = get_method_value_param_type(mtp);
2646                 }  /* if */
2647
2648                 /* first step: link all nodes and allocate data */
2649                 irg_walk_graph(irg, firm_clear_node_and_phi_links, prepare_links_and_handle_rotl, &lenv);
2650
2651                 if (lenv.flags & MUST_BE_LOWERED) {
2652                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2653
2654                         /* must do some work */
2655                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2656
2657                         /* last step: all waiting nodes */
2658                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2659                         current_ir_graph = irg;
2660                         while (! pdeq_empty(lenv.waitq)) {
2661                                 ir_node *node = pdeq_getl(lenv.waitq);
2662
2663                                 lower_ops(node, &lenv);
2664                         }  /* while */
2665
2666                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2667
2668                         /* outs are invalid, we changed the graph */
2669                         set_irg_outs_inconsistent(irg);
2670
2671                         if (lenv.flags & CF_CHANGED) {
2672                                 /* control flow changed, dominance info is invalid */
2673                                 set_irg_doms_inconsistent(irg);
2674                                 set_irg_extblk_inconsistent(irg);
2675                                 set_irg_loopinfo_inconsistent(irg);
2676                         }  /* if */
2677                 } else {
2678                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2679                 }  /* if */
2680                 pmap_destroy(lenv.proj_2_block);
2681                 DEL_ARR_F(lenv.entries);
2682                 obstack_free(&lenv.obst, NULL);
2683         }  /* for */
2684         del_pdeq(lenv.waitq);
2685         current_ir_graph = rem;
2686 }  /* lower_dw_ops */
2687
2688 /* Default implementation. */
2689 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2690                                     const ir_mode *imode, const ir_mode *omode,
2691                                     void *context)
2692 {
2693         char buf[64];
2694         ident *id;
2695         ir_entity *ent;
2696         (void) context;
2697
2698         if (imode == omode) {
2699                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2700         } else {
2701                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2702                         get_mode_name(imode), get_mode_name(omode));
2703         }  /* if */
2704         id = new_id_from_str(buf);
2705
2706         ent = new_entity(get_glob_type(), id, method);
2707         set_entity_ld_ident(ent, get_entity_ident(ent));
2708         set_entity_visibility(ent, visibility_external_allocated);
2709         return ent;
2710 }  /* def_create_intrinsic_fkt */