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