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