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

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