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         ir_mode  *high_signed;        /**< doubleword signed type */
 117         ir_mode  *high_unsigned;      /**< doubleword unsigned type */
 118         ir_mode  *low_signed;         /**< word signed type */
 119         ir_mode  *low_unsigned;       /**< word unsigned type */
 120         ident    *first_id;           /**< .l for little and .h for big endian */
 121         ident    *next_id;            /**< .h for little and .l for big endian */
 122         const lwrdw_param_t *params;  /**< transformation parameter */
 123         unsigned flags;               /**< some flags */
 124         int      n_entries;           /**< number of entries */
 125         ir_type  *value_param_tp;     /**< the old value param type */
 126 } lower_env_t;
 127
 128 /**
 129  * Create a method type for a Conv emulation from imode to omode.
 130  */
 131 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env)
 132 {
 133         conv_tp_entry_t key, *entry;
 134         ir_type *mtd;
 135
 136         key.imode = imode;
 137         key.omode = omode;
 138         key.mtd   = NULL;
 139
 140         entry = set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 141         if (! entry->mtd) {
 142                 int n_param = 1, n_res = 1;
 143
 144                 if (imode == env->high_signed || imode == env->high_unsigned)
 145                         n_param = 2;
 146                 if (omode == env->high_signed || omode == env->high_unsigned)
 147                         n_res = 2;
 148
 149                 /* create a new one */
 150                 mtd = new_type_method(n_param, n_res);
 151
 152                 /* set param types and result types */
 153                 n_param = 0;
 154                 if (imode == env->high_signed) {
 155                         set_method_param_type(mtd, n_param++, tp_u);
 156                         set_method_param_type(mtd, n_param++, tp_s);
 157                 } else if (imode == env->high_unsigned) {
 158                         set_method_param_type(mtd, n_param++, tp_u);
 159                         set_method_param_type(mtd, n_param++, tp_u);
 160                 } else {
 161                         ir_type *tp = get_type_for_mode(imode);
 162                         set_method_param_type(mtd, n_param++, tp);
 163                 }  /* if */
 164
 165                 n_res = 0;
 166                 if (omode == env->high_signed) {
 167                         set_method_res_type(mtd, n_res++, tp_u);
 168                         set_method_res_type(mtd, n_res++, tp_s);
 169                 } else if (omode == env->high_unsigned) {
 170                         set_method_res_type(mtd, n_res++, tp_u);
 171                         set_method_res_type(mtd, n_res++, tp_u);
 172                 } else {
 173                         ir_type *tp = get_type_for_mode(omode);
 174                         set_method_res_type(mtd, n_res++, tp);
 175                 }  /* if */
 176                 entry->mtd = mtd;
 177         } else {
 178                 mtd = entry->mtd;
 179         }  /* if */
 180         return mtd;
 181 }  /* get_conv_type */
 182
 183 /**
 184  * Add an additional control flow input to a block.
 185  * Patch all Phi nodes. The new Phi inputs are copied from
 186  * old input number nr.
 187  */
 188 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 189 {
 190         int i, arity = get_irn_arity(block);
 191         ir_node **in, *phi;
 192
 193         assert(nr < arity);
 194
 195         NEW_ARR_A(ir_node *, in, arity + 1);
 196         for (i = 0; i < arity; ++i)
 197                 in[i] = get_irn_n(block, i);
 198         in[i] = cf;
 199
 200         set_irn_in(block, i + 1, in);
 201
 202         for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
 203                 for (i = 0; i < arity; ++i)
 204                         in[i] = get_irn_n(phi, i);
 205                 in[i] = in[nr];
 206                 set_irn_in(phi, i + 1, in);
 207         }  /* for */
 208 }  /* add_block_cf_input_nr */
 209
 210 /**
 211  * Add an additional control flow input to a block.
 212  * Patch all Phi nodes. The new Phi inputs are copied from
 213  * old input from cf tmpl.
 214  */
 215 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 216 {
 217         int i, arity = get_irn_arity(block);
 218         int nr = 0;
 219
 220         for (i = 0; i < arity; ++i) {
 221                 if (get_irn_n(block, i) == tmpl) {
 222                         nr = i;
 223                         break;
 224                 }  /* if */
 225         }  /* for */
 226         assert(i < arity);
 227         add_block_cf_input_nr(block, nr, cf);
 228 }  /* add_block_cf_input */
 229
 230 /**
 231  * Return the "operational" mode of a Firm node.
 232  */
 233 static ir_mode *get_irn_op_mode(ir_node *node)
 234 {
 235         switch (get_irn_opcode(node)) {
 236         case iro_Load:
 237                 return get_Load_mode(node);
 238         case iro_Store:
 239                 return get_irn_mode(get_Store_value(node));
 240         case iro_DivMod:
 241                 return get_irn_mode(get_DivMod_left(node));
 242         case iro_Div:
 243                 return get_irn_mode(get_Div_left(node));
 244         case iro_Mod:
 245                 return get_irn_mode(get_Mod_left(node));
 246         case iro_Cmp:
 247                 return get_irn_mode(get_Cmp_left(node));
 248         default:
 249                 return get_irn_mode(node);
 250         }  /* switch */
 251 }  /* get_irn_op_mode */
 252
 253 /**
 254  * Walker, prepare the node links.
 255  */
 256 static void prepare_links(ir_node *node, void *env)
 257 {
 258         lower_env_t  *lenv = env;
 259         ir_mode      *mode = get_irn_op_mode(node);
 260         node_entry_t *link;
 261         int          i, idx;
 262
 263         if (mode == lenv->high_signed ||
 264                 mode == lenv->high_unsigned) {
 265                 /* ok, found a node that will be lowered */
 266                 link = OALLOCZ(&lenv->obst, node_entry_t);
 267
 268                 idx = get_irn_idx(node);
 269                 if (idx >= lenv->n_entries) {
 270                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 271                         int old = lenv->n_entries;
 272                         int n_idx = idx + (idx >> 3);
 273
 274                         ARR_RESIZE(node_entry_t *, lenv->entries, n_idx);
 275                         memset(&lenv->entries[old], 0, (n_idx - old) * sizeof(lenv->entries[0]));
 276                         lenv->n_entries = n_idx;
 277                 }
 278                 lenv->entries[idx] = link;
 279                 lenv->flags |= MUST_BE_LOWERED;
 280         } else if (is_Conv(node)) {
 281                 /* Conv nodes have two modes */
 282                 ir_node *pred = get_Conv_op(node);
 283                 mode = get_irn_mode(pred);
 284
 285                 if (mode == lenv->high_signed ||
 286                         mode == lenv->high_unsigned) {
 287                         /* must lower this node either but don't need a link */
 288                         lenv->flags |= MUST_BE_LOWERED;
 289                 }  /* if */
 290                 return;
 291         }  /* if */
 292
 293         if (is_Proj(node)) {
 294                 /* link all Proj nodes to its predecessor:
 295                    Note that Tuple Proj's and its Projs are linked either. */
 296                 ir_node *pred = get_Proj_pred(node);
 297
 298                 set_irn_link(node, get_irn_link(pred));
 299                 set_irn_link(pred, node);
 300         } else if (is_Phi(node)) {
 301                 /* link all Phi nodes to its block */
 302                 ir_node *block = get_nodes_block(node);
 303                 add_Block_phi(block, node);
 304         } else if (is_Block(node)) {
 305                 /* fill the Proj -> Block map */
 306                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 307                         ir_node *pred = get_Block_cfgpred(node, i);
 308
 309                         if (is_Proj(pred))
 310                                 pmap_insert(lenv->proj_2_block, pred, node);
 311                 }  /* for */
 312         }  /* if */
 313 }  /* prepare_links */
 314
 315 /**
 316  * Translate a Constant: create two.
 317  */
 318 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env)
 319 {
 320         tarval   *tv, *tv_l, *tv_h;
 321         ir_node  *low, *high;
 322         dbg_info *dbg = get_irn_dbg_info(node);
 323         int      idx;
 324         ir_graph *irg = current_ir_graph;
 325         ir_mode  *low_mode = env->low_unsigned;
 326
 327         tv   = get_Const_tarval(node);
 328
 329         tv_l = tarval_convert_to(tv, low_mode);
 330         low  = new_rd_Const(dbg, irg, tv_l);
 331
 332         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 333         high = new_rd_Const(dbg, irg, tv_h);
 334
 335         idx = get_irn_idx(node);
 336         assert(idx < env->n_entries);
 337         env->entries[idx]->low_word  = low;
 338         env->entries[idx]->high_word = high;
 339 }  /* lower_Const */
 340
 341 /**
 342  * Translate a Load: create two.
 343  */
 344 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env)
 345 {
 346         ir_mode    *low_mode = env->low_unsigned;
 347         ir_graph   *irg = current_ir_graph;
 348         ir_node    *adr = get_Load_ptr(node);
 349         ir_node    *mem = get_Load_mem(node);
 350         ir_node    *low, *high, *proj;
 351         dbg_info   *dbg;
 352         ir_node    *block = get_nodes_block(node);
 353         int         idx;
 354         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 355                                  ? cons_volatile : 0;
 356
 357         if (env->params->little_endian) {
 358                 low  = adr;
 359                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 360         } else {
 361                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 362                 high = adr;
 363         }  /* if */
 364
 365         /* create two loads */
 366         dbg  = get_irn_dbg_info(node);
 367         low  = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 368         proj = new_r_Proj(low, mode_M, pn_Load_M);
 369         high = new_rd_Load(dbg, block, proj, high, mode, volatility);
 370
 371         idx = get_irn_idx(node);
 372         assert(idx < env->n_entries);
 373         env->entries[idx]->low_word  = low;
 374         env->entries[idx]->high_word = high;
 375
 376         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 377                 idx = get_irn_idx(proj);
 378
 379                 switch (get_Proj_proj(proj)) {
 380                 case pn_Load_M:         /* Memory result. */
 381                         /* put it to the second one */
 382                         set_Proj_pred(proj, high);
 383                         break;
 384                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 385                         /* put it to the first one */
 386                         set_Proj_pred(proj, low);
 387                         break;
 388                 case pn_Load_res:       /* Result of load operation. */
 389                         assert(idx < env->n_entries);
 390                         env->entries[idx]->low_word  = new_r_Proj(low,  low_mode, pn_Load_res);
 391                         env->entries[idx]->high_word = new_r_Proj(high, mode,     pn_Load_res);
 392                         break;
 393                 default:
 394                         assert(0 && "unexpected Proj number");
 395                 }  /* switch */
 396                 /* mark this proj: we have handled it already, otherwise we might fall into
 397                  * out new nodes. */
 398                 mark_irn_visited(proj);
 399         }  /* for */
 400 }  /* lower_Load */
 401
 402 /**
 403  * Translate a Store: create two.
 404  */
 405 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env)
 406 {
 407         ir_graph     *irg;
 408         ir_node      *block, *adr, *mem;
 409         ir_node      *low, *high, *irn, *proj;
 410         dbg_info     *dbg;
 411         int           idx;
 412         node_entry_t *entry;
 413         ir_cons_flags    volatility = get_Store_volatility(node) == volatility_is_volatile
 414                                    ? cons_volatile : 0;
 415         (void) mode;
 416
 417         irn = get_Store_value(node);
 418         entry = env->entries[get_irn_idx(irn)];
 419         assert(entry);
 420
 421         if (! entry->low_word) {
 422                 /* not ready yet, wait */
 423                 pdeq_putr(env->waitq, node);
 424                 return;
 425         }  /* if */
 426
 427         irg = current_ir_graph;
 428         adr = get_Store_ptr(node);
 429         mem = get_Store_mem(node);
 430         block = get_nodes_block(node);
 431
 432         if (env->params->little_endian) {
 433                 low  = adr;
 434                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 435         } else {
 436                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 437                 high = adr;
 438         }  /* if */
 439
 440         /* create two Stores */
 441         dbg = get_irn_dbg_info(node);
 442         low  = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 443         proj = new_r_Proj(low, mode_M, pn_Store_M);
 444         high = new_rd_Store(dbg, block, proj, high, entry->high_word, volatility);
 445
 446         idx = get_irn_idx(node);
 447         assert(idx < env->n_entries);
 448         env->entries[idx]->low_word  = low;
 449         env->entries[idx]->high_word = high;
 450
 451         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 452                 idx = get_irn_idx(proj);
 453
 454                 switch (get_Proj_proj(proj)) {
 455                 case pn_Store_M:         /* Memory result. */
 456                         /* put it to the second one */
 457                         set_Proj_pred(proj, high);
 458                         break;
 459                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 460                         /* put it to the first one */
 461                         set_Proj_pred(proj, low);
 462                         break;
 463                 default:
 464                         assert(0 && "unexpected Proj number");
 465                 }  /* switch */
 466                 /* mark this proj: we have handled it already, otherwise we might fall into
 467                  * out new nodes. */
 468                 mark_irn_visited(proj);
 469         }  /* for */
 470 }  /* lower_Store */
 471
 472 /**
 473  * Return a node containing the address of the intrinsic emulation function.
 474  *
 475  * @param method  the method type of the emulation function
 476  * @param op      the emulated ir_op
 477  * @param imode   the input mode of the emulated opcode
 478  * @param omode   the output mode of the emulated opcode
 479  * @param env     the lower environment
 480  */
 481 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 482                                       ir_mode *imode, ir_mode *omode,
 483                                       lower_env_t *env)
 484 {
 485         symconst_symbol sym;
 486         ir_entity *ent;
 487         op_mode_entry_t key, *entry;
 488
 489         key.op    = op;
 490         key.imode = imode;
 491         key.omode = omode;
 492         key.ent   = NULL;
 493
 494         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 495                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 496         if (! entry->ent) {
 497                 /* create a new one */
 498                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 499
 500                 assert(ent && "Intrinsic creator must return an entity");
 501                 entry->ent = ent;
 502         } else {
 503                 ent = entry->ent;
 504         }  /* if */
 505         sym.entity_p = ent;
 506         return new_r_SymConst(current_ir_graph, mode_P_code, sym, symconst_addr_ent);
 507 }  /* get_intrinsic_address */
 508
 509 /**
 510  * Translate a Div.
 511  *
 512  * Create an intrinsic Call.
 513  */
 514 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env)
 515 {
 516         ir_node  *block, *irn, *call, *proj;
 517         ir_node  *in[4];
 518         ir_mode  *opmode;
 519         dbg_info *dbg;
 520         ir_type  *mtp;
 521         int      idx;
 522         node_entry_t *entry;
 523
 524         irn   = get_Div_left(node);
 525         entry = env->entries[get_irn_idx(irn)];
 526         assert(entry);
 527
 528         if (! entry->low_word) {
 529                 /* not ready yet, wait */
 530                 pdeq_putr(env->waitq, node);
 531                 return;
 532         }  /* if */
 533
 534         in[0] = entry->low_word;
 535         in[1] = entry->high_word;
 536
 537         irn   = get_Div_right(node);
 538         entry = env->entries[get_irn_idx(irn)];
 539         assert(entry);
 540
 541         if (! entry->low_word) {
 542                 /* not ready yet, wait */
 543                 pdeq_putr(env->waitq, node);
 544                 return;
 545         }  /* if */
 546
 547         in[2] = entry->low_word;
 548         in[3] = entry->high_word;
 549
 550         dbg   = get_irn_dbg_info(node);
 551         block = get_nodes_block(node);
 552
 553         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 554         opmode = get_irn_op_mode(node);
 555         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 556         call = new_rd_Call(dbg, block, get_Div_mem(node), irn, 4, in, mtp);
 557         set_irn_pinned(call, get_irn_pinned(node));
 558         irn = new_r_Proj(call, mode_T, pn_Call_T_result);
 559
 560         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 561                 switch (get_Proj_proj(proj)) {
 562                 case pn_Div_M:         /* Memory result. */
 563                         /* reroute to the call */
 564                         set_Proj_pred(proj, call);
 565                         set_Proj_proj(proj, pn_Call_M);
 566                         break;
 567                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 568                         /* reroute to the call */
 569                         set_Proj_pred(proj, call);
 570                         set_Proj_proj(proj, pn_Call_X_except);
 571                         break;
 572                 case pn_Div_res:       /* Result of computation. */
 573                         idx = get_irn_idx(proj);
 574                         assert(idx < env->n_entries);
 575                         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 576                         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 577                         break;
 578                 default:
 579                         assert(0 && "unexpected Proj number");
 580                 }  /* switch */
 581                 /* mark this proj: we have handled it already, otherwise we might fall into
 582                  * out new nodes. */
 583                 mark_irn_visited(proj);
 584         }  /* for */
 585 }  /* lower_Div */
 586
 587 /**
 588  * Translate a Mod.
 589  *
 590  * Create an intrinsic Call.
 591  */
 592 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env)
 593 {
 594         ir_node  *block, *proj, *irn, *call;
 595         ir_node  *in[4];
 596         ir_mode  *opmode;
 597         dbg_info *dbg;
 598         ir_type  *mtp;
 599         int      idx;
 600         node_entry_t *entry;
 601
 602         irn   = get_Mod_left(node);
 603         entry = env->entries[get_irn_idx(irn)];
 604         assert(entry);
 605
 606         if (! entry->low_word) {
 607                 /* not ready yet, wait */
 608                 pdeq_putr(env->waitq, node);
 609                 return;
 610         }  /* if */
 611
 612         in[0] = entry->low_word;
 613         in[1] = entry->high_word;
 614
 615         irn   = get_Mod_right(node);
 616         entry = env->entries[get_irn_idx(irn)];
 617         assert(entry);
 618
 619         if (! entry->low_word) {
 620                 /* not ready yet, wait */
 621                 pdeq_putr(env->waitq, node);
 622                 return;
 623         }  /* if */
 624
 625         in[2] = entry->low_word;
 626         in[3] = entry->high_word;
 627
 628         dbg   = get_irn_dbg_info(node);
 629         block = get_nodes_block(node);
 630
 631         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 632         opmode = get_irn_op_mode(node);
 633         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 634         call = new_rd_Call(dbg, block, get_Mod_mem(node), irn, 4, in, mtp);
 635         set_irn_pinned(call, get_irn_pinned(node));
 636         irn = new_r_Proj(call, mode_T, pn_Call_T_result);
 637
 638         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 639                 switch (get_Proj_proj(proj)) {
 640                 case pn_Mod_M:         /* Memory result. */
 641                         /* reroute to the call */
 642                         set_Proj_pred(proj, call);
 643                         set_Proj_proj(proj, pn_Call_M);
 644                         break;
 645                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 646                         /* reroute to the call */
 647                         set_Proj_pred(proj, call);
 648                         set_Proj_proj(proj, pn_Call_X_except);
 649                         break;
 650                 case pn_Mod_res:       /* Result of computation. */
 651                         idx = get_irn_idx(proj);
 652                         assert(idx < env->n_entries);
 653                         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 654                         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 655                         break;
 656                 default:
 657                         assert(0 && "unexpected Proj number");
 658                 }  /* switch */
 659                 /* mark this proj: we have handled it already, otherwise we might fall into
 660                  * out new nodes. */
 661                 mark_irn_visited(proj);
 662         }  /* for */
 663 }  /* lower_Mod */
 664
 665 /**
 666  * Translate a DivMod.
 667  *
 668  * Create two intrinsic Calls.
 669  */
 670 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env)
 671 {
 672         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod;
 673         ir_node  *resDiv = NULL;
 674         ir_node  *resMod = NULL;
 675         ir_node  *in[4];
 676         ir_mode  *opmode;
 677         dbg_info *dbg;
 678         ir_type  *mtp;
 679         int      idx;
 680         node_entry_t *entry;
 681         unsigned flags = 0;
 682
 683         /* check if both results are needed */
 684         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 685                 switch (get_Proj_proj(proj)) {
 686                 case pn_DivMod_res_div: flags |= 1; break;
 687                 case pn_DivMod_res_mod: flags |= 2; break;
 688                 default: break;
 689                 }  /* switch */
 690         }  /* for */
 691
 692         irn   = get_DivMod_left(node);
 693         entry = env->entries[get_irn_idx(irn)];
 694         assert(entry);
 695
 696         if (! entry->low_word) {
 697                 /* not ready yet, wait */
 698                 pdeq_putr(env->waitq, node);
 699                 return;
 700         }  /* if */
 701
 702         in[0] = entry->low_word;
 703         in[1] = entry->high_word;
 704
 705         irn   = get_DivMod_right(node);
 706         entry = env->entries[get_irn_idx(irn)];
 707         assert(entry);
 708
 709         if (! entry->low_word) {
 710                 /* not ready yet, wait */
 711                 pdeq_putr(env->waitq, node);
 712                 return;
 713         }  /* if */
 714
 715         in[2] = entry->low_word;
 716         in[3] = entry->high_word;
 717
 718         dbg   = get_irn_dbg_info(node);
 719         block = get_nodes_block(node);
 720
 721         mem = get_DivMod_mem(node);
 722
 723         callDiv = callMod = NULL;
 724         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 725         if (flags & 1) {
 726                 opmode = get_irn_op_mode(node);
 727                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, env);
 728                 callDiv = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 729                 set_irn_pinned(callDiv, get_irn_pinned(node));
 730                 resDiv = new_r_Proj(callDiv, mode_T, pn_Call_T_result);
 731         }  /* if */
 732         if (flags & 2) {
 733                 if (flags & 1)
 734                         mem = new_r_Proj(callDiv, mode_M, pn_Call_M);
 735                 opmode = get_irn_op_mode(node);
 736                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, env);
 737                 callMod = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 738                 set_irn_pinned(callMod, get_irn_pinned(node));
 739                 resMod = new_r_Proj(callMod, mode_T, pn_Call_T_result);
 740         }  /* if */
 741
 742         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 743                 switch (get_Proj_proj(proj)) {
 744                 case pn_DivMod_M:         /* Memory result. */
 745                         /* reroute to the first call */
 746                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 747                         set_Proj_proj(proj, pn_Call_M);
 748                         break;
 749                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 750                         /* reroute to the first call */
 751                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 752                         set_Proj_proj(proj, pn_Call_X_except);
 753                         break;
 754                 case pn_DivMod_res_div:   /* Result of Div. */
 755                         idx = get_irn_idx(proj);
 756                         assert(idx < env->n_entries);
 757                         env->entries[idx]->low_word  = new_r_Proj(resDiv, env->low_unsigned, 0);
 758                         env->entries[idx]->high_word = new_r_Proj(resDiv, mode,                      1);
 759                         break;
 760                 case pn_DivMod_res_mod:   /* Result of Mod. */
 761                         idx = get_irn_idx(proj);
 762                         env->entries[idx]->low_word  = new_r_Proj(resMod, env->low_unsigned, 0);
 763                         env->entries[idx]->high_word = new_r_Proj(resMod, mode,                      1);
 764                         break;
 765                 default:
 766                         assert(0 && "unexpected Proj number");
 767                 }  /* switch */
 768                 /* mark this proj: we have handled it already, otherwise we might fall into
 769                  * out new nodes. */
 770                 mark_irn_visited(proj);
 771         }  /* for */
 772 }  /* lower_DivMod */
 773
 774 /**
 775  * Translate a Binop.
 776  *
 777  * Create an intrinsic Call.
 778  */
 779 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env)
 780 {
 781         ir_node  *block, *irn;
 782         ir_node  *in[4];
 783         dbg_info *dbg;
 784         ir_type  *mtp;
 785         int      idx;
 786         ir_graph *irg;
 787         node_entry_t *entry;
 788
 789         irn   = get_binop_left(node);
 790         entry = env->entries[get_irn_idx(irn)];
 791         assert(entry);
 792
 793         if (! entry->low_word) {
 794                 /* not ready yet, wait */
 795                 pdeq_putr(env->waitq, node);
 796                 return;
 797         }  /* if */
 798
 799         in[0] = entry->low_word;
 800         in[1] = entry->high_word;
 801
 802         irn   = get_binop_right(node);
 803         entry = env->entries[get_irn_idx(irn)];
 804         assert(entry);
 805
 806         if (! entry->low_word) {
 807                 /* not ready yet, wait */
 808                 pdeq_putr(env->waitq, node);
 809                 return;
 810         }  /* if */
 811
 812         in[2] = entry->low_word;
 813         in[3] = entry->high_word;
 814
 815         dbg   = get_irn_dbg_info(node);
 816         block = get_nodes_block(node);
 817         irg   = current_ir_graph;
 818
 819         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 820         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 821         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 822                 irn, 4, in, mtp);
 823         set_irn_pinned(irn, get_irn_pinned(node));
 824         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
 825
 826         idx = get_irn_idx(node);
 827         assert(idx < env->n_entries);
 828         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 829         env->entries[idx]->high_word = new_r_Proj(irn, mode,              1);
 830 }  /* lower_Binop */
 831
 832 /**
 833  * Translate a Shiftop.
 834  *
 835  * Create an intrinsic Call.
 836  */
 837 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env)
 838 {
 839         ir_node  *block, *irn;
 840         ir_node  *in[3];
 841         dbg_info *dbg;
 842         ir_type  *mtp;
 843         int      idx;
 844         ir_graph *irg;
 845         node_entry_t *entry;
 846
 847         irn   = get_binop_left(node);
 848         entry = env->entries[get_irn_idx(irn)];
 849         assert(entry);
 850
 851         if (! entry->low_word) {
 852                 /* not ready yet, wait */
 853                 pdeq_putr(env->waitq, node);
 854                 return;
 855         }  /* if */
 856
 857         in[0] = entry->low_word;
 858         in[1] = entry->high_word;
 859
 860         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 861         in[2] = get_binop_right(node);
 862         assert(get_irn_mode(in[2]) != env->high_signed
 863                         && get_irn_mode(in[2]) != env->high_unsigned);
 864
 865         dbg   = get_irn_dbg_info(node);
 866         block = get_nodes_block(node);
 867         irg  = current_ir_graph;
 868
 869         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 870         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 871         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 872                 irn, 3, in, mtp);
 873         set_irn_pinned(irn, get_irn_pinned(node));
 874         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
 875
 876         idx = get_irn_idx(node);
 877         assert(idx < env->n_entries);
 878         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 879         env->entries[idx]->high_word = new_r_Proj(irn, mode,              1);
 880 }  /* lower_Shiftop */
 881
 882 /**
 883  * Translate a Shr and handle special cases.
 884  */
 885 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env)
 886 {
 887         ir_node  *right = get_Shr_right(node);
 888         ir_graph *irg = current_ir_graph;
 889
 890         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 891                 tarval *tv = get_Const_tarval(right);
 892
 893                 if (tarval_is_long(tv) &&
 894                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 895                         ir_node *block        = get_nodes_block(node);
 896                         ir_node *left         = get_Shr_left(node);
 897                         ir_mode *low_unsigned = env->low_unsigned;
 898                         ir_node *c;
 899                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 900                         int idx = get_irn_idx(left);
 901
 902                         left = env->entries[idx]->high_word;
 903                         if (left == NULL) {
 904                                 /* not ready yet, wait */
 905                                 pdeq_putr(env->waitq, node);
 906                                 return;
 907                         }
 908
 909                         idx = get_irn_idx(node);
 910                         /* convert high word into low_unsigned mode if necessary */
 911                         if (get_irn_mode(left) != low_unsigned)
 912                                 left = new_r_Conv(block, left, low_unsigned);
 913
 914                         if (shf_cnt > 0) {
 915                                 c = new_r_Const_long(irg, low_unsigned, shf_cnt);
 916                                 env->entries[idx]->low_word = new_r_Shr(block, left, c,
 917                                                                         low_unsigned);
 918                         } else {
 919                                 env->entries[idx]->low_word = left;
 920                         }  /* if */
 921                         env->entries[idx]->high_word = new_r_Const(irg, get_mode_null(mode));
 922
 923                         return;
 924                 }  /* if */
 925         }  /* if */
 926         lower_Shiftop(node, mode, env);
 927 }  /* lower_Shr */
 928
 929 /**
 930  * Translate a Shl and handle special cases.
 931  */
 932 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env)
 933 {
 934         ir_node  *right = get_Shl_right(node);
 935         ir_graph *irg = current_ir_graph;
 936
 937         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 938                 tarval *tv = get_Const_tarval(right);
 939
 940                 if (tarval_is_long(tv) &&
 941                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 942                         ir_mode *mode_l;
 943                         ir_node *block = get_nodes_block(node);
 944                         ir_node *left = get_Shl_left(node);
 945                         ir_node *c;
 946                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 947                         int idx = get_irn_idx(left);
 948
 949                         left = env->entries[idx]->low_word;
 950                         if (left == NULL) {
 951                                 /* not ready yet, wait */
 952                                 pdeq_putr(env->waitq, node);
 953                                 return;
 954                         }
 955
 956                         left = new_r_Conv(block, left, mode);
 957                         idx = get_irn_idx(node);
 958
 959                         mode_l = env->low_unsigned;
 960                         if (shf_cnt > 0) {
 961                                 c = new_r_Const_long(irg, mode_l, shf_cnt);
 962                                 env->entries[idx]->high_word = new_r_Shl(block, left, c, mode);
 963                         } else {
 964                                 env->entries[idx]->high_word = left;
 965                         }  /* if */
 966                         env->entries[idx]->low_word  = new_r_Const(irg, get_mode_null(mode_l));
 967
 968                         return;
 969                 }  /* if */
 970         }  /* if */
 971         lower_Shiftop(node, mode, env);
 972 }  /* lower_Shl */
 973
 974 /**
 975  * Translate a Shrs and handle special cases.
 976  */
 977 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env)
 978 {
 979         ir_node  *right = get_Shrs_right(node);
 980         ir_graph *irg = current_ir_graph;
 981
 982         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 983                 tarval *tv = get_Const_tarval(right);
 984
 985                 if (tarval_is_long(tv) &&
 986                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 987                         ir_node *block         = get_nodes_block(node);
 988                         ir_node *left          = get_Shrs_left(node);
 989                         ir_mode *low_unsigned  = env->low_unsigned;
 990                         long     shf_cnt       = get_tarval_long(tv) - get_mode_size_bits(mode);
 991                         int      idx           = get_irn_idx(left);
 992                         ir_node *left_unsigned = left;
 993                         ir_node *low;
 994                         ir_node *c;
 995
 996                         left = env->entries[idx]->high_word;
 997                         if (left == NULL) {
 998                                 /* not ready yet, wait */
 999                                 pdeq_putr(env->waitq, node);
1000                                 return;
1001                         }
1002
1003                         idx = get_irn_idx(node);
1004                         /* convert high word into low_unsigned mode if necessary */
1005                         if (get_irn_mode(left_unsigned) != low_unsigned)
1006                                 left_unsigned = new_r_Conv(block, left, low_unsigned);
1007
1008                         if (shf_cnt > 0) {
1009                                 c   = new_r_Const_long(irg, low_unsigned, shf_cnt);
1010                                 low = new_r_Shrs(block, left_unsigned, c, low_unsigned);
1011                         } else {
1012                                 low = left_unsigned;
1013                         }  /* if */
1014                         /* low word is expected to have low_unsigned */
1015                         env->entries[idx]->low_word = new_r_Conv(block, low, low_unsigned);
1016
1017                         c = new_r_Const_long(irg, low_unsigned,
1018                                              get_mode_size_bits(mode) - 1);
1019                         env->entries[idx]->high_word = new_r_Shrs(block, left, c, mode);
1020
1021                         return;
1022                 }  /* if */
1023         }  /* if */
1024         lower_Shiftop(node, mode, env);
1025 }  /* lower_Shrs */
1026
1027 /**
1028  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1029  */
1030 static void prepare_links_and_handle_rotl(ir_node *node, void *env)
1031 {
1032         lower_env_t *lenv = env;
1033
1034         if (is_Rotl(node)) {
1035                 ir_mode *mode = get_irn_op_mode(node);
1036                         if (mode == lenv->high_signed ||
1037                             mode == lenv->high_unsigned) {
1038                                 ir_node  *right = get_Rotl_right(node);
1039                                 ir_node  *left, *shl, *shr, *or, *block, *sub, *c;
1040                                 ir_mode  *omode, *rmode;
1041                                 ir_graph *irg;
1042                                 dbg_info *dbg;
1043                                 optimization_state_t state;
1044
1045                                 if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1046                                         tarval *tv = get_Const_tarval(right);
1047
1048                                         if (tarval_is_long(tv) &&
1049                                             get_tarval_long(tv) == (long)get_mode_size_bits(mode)) {
1050                                                 /* will be optimized in lower_Rotl() */
1051                                                 return;
1052                                         }
1053                                 }
1054
1055                                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) and lower those */
1056                                 irg   = get_irn_irg(node);
1057                                 dbg   = get_irn_dbg_info(node);
1058                                 omode = get_irn_mode(node);
1059                                 left  = get_Rotl_left(node);
1060                                 block = get_nodes_block(node);
1061                                 shl   = new_rd_Shl(dbg, block, left, right, omode);
1062                                 rmode = get_irn_mode(right);
1063                                 c     = new_r_Const_long(irg, rmode, get_mode_size_bits(omode));
1064                                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
1065                                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
1066
1067                                 /* optimization must be switched off here, or we will get the Rotl back */
1068                                 save_optimization_state(&state);
1069                                 set_opt_algebraic_simplification(0);
1070                                 or = new_rd_Or(dbg, block, shl, shr, omode);
1071                                 restore_optimization_state(&state);
1072
1073                                 exchange(node, or);
1074
1075                                 /* do lowering on the new nodes */
1076                                 prepare_links(shl, env);
1077                                 prepare_links(c, env);
1078                                 prepare_links(sub, env);
1079                                 prepare_links(shr, env);
1080                                 prepare_links(or, env);
1081                         }
1082         } else {
1083                 prepare_links(node, env);
1084         }
1085 }
1086
1087 /**
1088  * Translate a special case Rotl(x, sizeof(w)).
1089  */
1090 static void lower_Rotl(ir_node *node, ir_mode *mode, lower_env_t *env)
1091 {
1092         ir_node *right = get_Rotl_right(node);
1093         ir_node *left = get_Rotl_left(node);
1094         ir_node *h, *l;
1095         int idx = get_irn_idx(left);
1096         (void) right;
1097         (void) mode;
1098
1099         assert(get_mode_arithmetic(mode) == irma_twos_complement &&
1100                is_Const(right) && tarval_is_long(get_Const_tarval(right)) &&
1101                get_tarval_long(get_Const_tarval(right)) == (long)get_mode_size_bits(mode));
1102
1103         l = env->entries[idx]->low_word;
1104         h = env->entries[idx]->high_word;
1105         idx = get_irn_idx(node);
1106
1107         env->entries[idx]->low_word  = h;
1108         env->entries[idx]->high_word = l;
1109 }  /* lower_Rotl */
1110
1111 /**
1112  * Translate an Unop.
1113  *
1114  * Create an intrinsic Call.
1115  */
1116 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env)
1117 {
1118         ir_node  *block, *irn;
1119         ir_node  *in[2];
1120         dbg_info *dbg;
1121         ir_type  *mtp;
1122         int      idx;
1123         node_entry_t *entry;
1124
1125         irn   = get_unop_op(node);
1126         entry = env->entries[get_irn_idx(irn)];
1127         assert(entry);
1128
1129         if (! entry->low_word) {
1130                 /* not ready yet, wait */
1131                 pdeq_putr(env->waitq, node);
1132                 return;
1133         }  /* if */
1134
1135         in[0] = entry->low_word;
1136         in[1] = entry->high_word;
1137
1138         dbg   = get_irn_dbg_info(node);
1139         block = get_nodes_block(node);
1140
1141         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1142         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
1143         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
1144                 irn, 2, in, mtp);
1145         set_irn_pinned(irn, get_irn_pinned(node));
1146         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
1147
1148         idx = get_irn_idx(node);
1149         assert(idx < env->n_entries);
1150         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
1151         env->entries[idx]->high_word = new_r_Proj(irn, mode,              1);
1152 }  /* lower_Unop */
1153
1154 /**
1155  * Translate a logical Binop.
1156  *
1157  * Create two logical Binops.
1158  */
1159 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1160                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1161         ir_node  *block, *irn;
1162         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1163         dbg_info *dbg;
1164         int      idx;
1165         ir_graph *irg;
1166         node_entry_t *entry;
1167
1168         irn   = get_binop_left(node);
1169         entry = env->entries[get_irn_idx(irn)];
1170         assert(entry);
1171
1172         if (! entry->low_word) {
1173                 /* not ready yet, wait */
1174                 pdeq_putr(env->waitq, node);
1175                 return;
1176         }  /* if */
1177
1178         lop_l = entry->low_word;
1179         lop_h = entry->high_word;
1180
1181         irn   = get_binop_right(node);
1182         entry = env->entries[get_irn_idx(irn)];
1183         assert(entry);
1184
1185         if (! entry->low_word) {
1186                 /* not ready yet, wait */
1187                 pdeq_putr(env->waitq, node);
1188                 return;
1189         }  /* if */
1190
1191         rop_l = entry->low_word;
1192         rop_h = entry->high_word;
1193
1194         dbg = get_irn_dbg_info(node);
1195         block = get_nodes_block(node);
1196
1197         idx = get_irn_idx(node);
1198         assert(idx < env->n_entries);
1199         irg = current_ir_graph;
1200         env->entries[idx]->low_word  = constr_rd(dbg, block, lop_l, rop_l, env->low_unsigned);
1201         env->entries[idx]->high_word = constr_rd(dbg, block, lop_h, rop_h, mode);
1202 }  /* lower_Binop_logical */
1203
1204 /** create a logical operation transformation */
1205 #define lower_logical(op)                                                \
1206 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1207         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1208 }
1209
1210 lower_logical(And)
1211 lower_logical(Or)
1212 lower_logical(Eor)
1213
1214 /**
1215  * Translate a Not.
1216  *
1217  * Create two logical Nots.
1218  */
1219 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env)
1220 {
1221         ir_node  *block, *irn;
1222         ir_node  *op_l, *op_h;
1223         dbg_info *dbg;
1224         int      idx;
1225         node_entry_t *entry;
1226
1227         irn   = get_Not_op(node);
1228         entry = env->entries[get_irn_idx(irn)];
1229         assert(entry);
1230
1231         if (! entry->low_word) {
1232                 /* not ready yet, wait */
1233                 pdeq_putr(env->waitq, node);
1234                 return;
1235         }  /* if */
1236
1237         op_l = entry->low_word;
1238         op_h = entry->high_word;
1239
1240         dbg   = get_irn_dbg_info(node);
1241         block = get_nodes_block(node);
1242
1243         idx = get_irn_idx(node);
1244         assert(idx < env->n_entries);
1245         env->entries[idx]->low_word  = new_rd_Not(dbg, block, op_l, env->low_unsigned);
1246         env->entries[idx]->high_word = new_rd_Not(dbg, block, op_h, mode);
1247 }  /* lower_Not */
1248
1249 /**
1250  * Translate a Cond.
1251  */
1252 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env)
1253 {
1254         ir_node *cmp, *left, *right, *block;
1255         ir_node *sel = get_Cond_selector(node);
1256         ir_mode *m = get_irn_mode(sel);
1257         int     idx;
1258         (void) mode;
1259
1260         if (m == mode_b) {
1261                 node_entry_t *lentry, *rentry;
1262                 ir_node  *proj, *projT = NULL, *projF = NULL;
1263                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1264                 ir_node  *projHF, *projHT;
1265                 ir_node  *dst_blk;
1266                 pn_Cmp   pnc;
1267                 ir_graph *irg;
1268                 dbg_info *dbg;
1269
1270                 if (!is_Proj(sel))
1271                         return;
1272
1273                 cmp   = get_Proj_pred(sel);
1274                 if (!is_Cmp(cmp))
1275                         return;
1276
1277                 left  = get_Cmp_left(cmp);
1278                 idx   = get_irn_idx(left);
1279                 lentry = env->entries[idx];
1280
1281                 if (! lentry) {
1282                         /* a normal Cmp */
1283                         return;
1284                 }  /* if */
1285
1286                 right = get_Cmp_right(cmp);
1287                 idx   = get_irn_idx(right);
1288                 rentry = env->entries[idx];
1289                 assert(rentry);
1290
1291                 if (! lentry->low_word || !rentry->low_word) {
1292                         /* not yet ready */
1293                         pdeq_putr(env->waitq, node);
1294                         return;
1295                 }  /* if */
1296
1297                 /* all right, build the code */
1298                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1299                         long proj_nr = get_Proj_proj(proj);
1300
1301                         if (proj_nr == pn_Cond_true) {
1302                                 assert(projT == NULL && "more than one Proj(true)");
1303                                 projT = proj;
1304                         } else {
1305                                 assert(proj_nr == pn_Cond_false);
1306                                 assert(projF == NULL && "more than one Proj(false)");
1307                                 projF = proj;
1308                         }  /* if */
1309                         mark_irn_visited(proj);
1310                 }  /* for */
1311                 assert(projT && projF);
1312
1313                 /* create a new high compare */
1314                 block = get_nodes_block(node);
1315                 irg   = get_Block_irg(block);
1316                 dbg   = get_irn_dbg_info(cmp);
1317                 pnc   = get_Proj_proj(sel);
1318
1319                 if (is_Const(right) && is_Const_null(right)) {
1320                         if (pnc == pn_Cmp_Eq || pnc == pn_Cmp_Lg) {
1321                                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1322                                 ir_mode *mode = env->low_unsigned;
1323                                 ir_node *low  = new_r_Conv(block, lentry->low_word, mode);
1324                                 ir_node *high = new_r_Conv(block, lentry->high_word, mode);
1325                                 ir_node *or   = new_rd_Or(dbg, block, low, high, mode);
1326                                 ir_node *cmp  = new_rd_Cmp(dbg, block, or, new_r_Const_long(irg, mode, 0));
1327
1328                                 ir_node *proj = new_r_Proj(cmp, mode_b, pnc);
1329                                 set_Cond_selector(node, proj);
1330                                 return;
1331                         }
1332                 }
1333
1334                 cmpH = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word);
1335
1336                 if (pnc == pn_Cmp_Eq) {
1337                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1338                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1339
1340                         assert(entry);
1341                         dst_blk = entry->value;
1342
1343                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Eq);
1344                         dbg = get_irn_dbg_info(node);
1345                         irn = new_rd_Cond(dbg, block, irn);
1346
1347                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1348                         mark_irn_visited(projHF);
1349                         exchange(projF, projHF);
1350
1351                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1352                         mark_irn_visited(projHT);
1353
1354                         new_bl = new_r_Block(irg, 1, &projHT);
1355
1356                         dbg   = get_irn_dbg_info(cmp);
1357                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1358                         irn = new_r_Proj(cmpL, mode_b, pn_Cmp_Eq);
1359                         dbg = get_irn_dbg_info(node);
1360                         irn = new_rd_Cond(dbg, new_bl, irn);
1361
1362                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1363                         mark_irn_visited(proj);
1364                         add_block_cf_input(dst_blk, projHF, proj);
1365
1366                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1367                         mark_irn_visited(proj);
1368                         exchange(projT, proj);
1369                 } else if (pnc == pn_Cmp_Lg) {
1370                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1371                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1372
1373                         assert(entry);
1374                         dst_blk = entry->value;
1375
1376                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Lg);
1377                         dbg = get_irn_dbg_info(node);
1378                         irn = new_rd_Cond(dbg, block, irn);
1379
1380                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1381                         mark_irn_visited(projHT);
1382                         exchange(projT, projHT);
1383
1384                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1385                         mark_irn_visited(projHF);
1386
1387                         new_bl = new_r_Block(irg, 1, &projHF);
1388
1389                         dbg   = get_irn_dbg_info(cmp);
1390                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1391                         irn = new_r_Proj(cmpL, mode_b, pn_Cmp_Lg);
1392                         dbg = get_irn_dbg_info(node);
1393                         irn = new_rd_Cond(dbg, new_bl, irn);
1394
1395                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1396                         mark_irn_visited(proj);
1397                         add_block_cf_input(dst_blk, projHT, proj);
1398
1399                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1400                         mark_irn_visited(proj);
1401                         exchange(projF, proj);
1402                 } else {
1403                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1404                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1405                         pmap_entry *entry;
1406
1407                         entry = pmap_find(env->proj_2_block, projT);
1408                         assert(entry);
1409                         dstT = entry->value;
1410
1411                         entry = pmap_find(env->proj_2_block, projF);
1412                         assert(entry);
1413                         dstF = entry->value;
1414
1415                         irn = new_r_Proj(cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1416                         dbg = get_irn_dbg_info(node);
1417                         irn = new_rd_Cond(dbg, block, irn);
1418
1419                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1420                         mark_irn_visited(projHT);
1421                         exchange(projT, projHT);
1422                         projT = projHT;
1423
1424                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1425                         mark_irn_visited(projHF);
1426
1427                         newbl_eq = new_r_Block(irg, 1, &projHF);
1428
1429                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Eq);
1430                         irn = new_rd_Cond(dbg, newbl_eq, irn);
1431
1432                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1433                         mark_irn_visited(proj);
1434                         exchange(projF, proj);
1435                         projF = proj;
1436
1437                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1438                         mark_irn_visited(proj);
1439
1440                         newbl_l = new_r_Block(irg, 1, &proj);
1441
1442                         dbg   = get_irn_dbg_info(cmp);
1443                         cmpL = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word);
1444                         irn = new_r_Proj(cmpL, mode_b, pnc);
1445                         dbg = get_irn_dbg_info(node);
1446                         irn = new_rd_Cond(dbg, newbl_l, irn);
1447
1448                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1449                         mark_irn_visited(proj);
1450                         add_block_cf_input(dstT, projT, proj);
1451
1452                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1453                         mark_irn_visited(proj);
1454                         add_block_cf_input(dstF, projF, proj);
1455                 }  /* if */
1456
1457                 /* we have changed the control flow */
1458                 env->flags |= CF_CHANGED;
1459         } else {
1460                 idx = get_irn_idx(sel);
1461
1462                 if (env->entries[idx]) {
1463                         /*
1464                            Bad, a jump-table with double-word index.
1465                            This should not happen, but if it does we handle
1466                            it like a Conv were between (in other words, ignore
1467                            the high part.
1468                          */
1469
1470                         if (! env->entries[idx]->low_word) {
1471                                 /* not ready yet, wait */
1472                                 pdeq_putr(env->waitq, node);
1473                                 return;
1474                         }  /* if */
1475                         set_Cond_selector(node, env->entries[idx]->low_word);
1476                 }  /* if */
1477         }  /* if */
1478 }  /* lower_Cond */
1479
1480 /**
1481  * Translate a Conv to higher_signed
1482  */
1483 static void lower_Conv_to_Ll(ir_node *node, lower_env_t *env)
1484 {
1485         ir_mode  *omode        = get_irn_mode(node);
1486         ir_node  *op           = get_Conv_op(node);
1487         ir_mode  *imode        = get_irn_mode(op);
1488         int      idx           = get_irn_idx(node);
1489         ir_graph *irg          = current_ir_graph;
1490         ir_node  *block        = get_nodes_block(node);
1491         dbg_info *dbg          = get_irn_dbg_info(node);
1492         node_entry_t *entry = env->entries[idx];
1493         ir_mode  *low_unsigned = env->low_unsigned;
1494         ir_mode  *low_signed
1495                 = mode_is_signed(omode) ? env->low_signed : low_unsigned;
1496
1497         assert(idx < env->n_entries);
1498
1499         if (mode_is_int(imode) || mode_is_reference(imode)) {
1500                 if (imode == env->high_signed
1501                                 || imode == env->high_unsigned) {
1502                         /* a Conv from Lu to Ls or Ls to Lu */
1503                         int           op_idx   = get_irn_idx(op);
1504                         node_entry_t *op_entry = env->entries[op_idx];
1505
1506                         if (! op_entry->low_word) {
1507                                 /* not ready yet, wait */
1508                                 pdeq_putr(env->waitq, node);
1509                                 return;
1510                         }
1511                         entry->low_word  = op_entry->low_word;
1512                         entry->high_word = new_rd_Conv(dbg, block, op_entry->high_word,
1513                                                        low_signed);
1514                 } else {
1515                         /* simple case: create a high word */
1516                         if (imode != low_unsigned)
1517                                 op = new_rd_Conv(dbg, block, op, low_unsigned);
1518
1519                         entry->low_word = op;
1520
1521                         if (mode_is_signed(imode)) {
1522                                 int      c       = get_mode_size_bits(low_signed) - 1;
1523                                 ir_node *cnst    = new_r_Const_long(irg, low_unsigned, c);
1524                                 if (get_irn_mode(op) != low_signed)
1525                                         op = new_rd_Conv(dbg, block, op, low_signed);
1526                                 entry->high_word = new_rd_Shrs(dbg, block, op, cnst,
1527                                                                low_signed);
1528                         } else {
1529                                 entry->high_word = new_r_Const(irg, get_mode_null(low_signed));
1530                         }
1531                 }
1532         } else if (imode == mode_b) {
1533                 entry->low_word = new_rd_Conv(dbg, block, op, low_unsigned);
1534                 entry->high_word = new_r_Const(irg, get_mode_null(low_signed));
1535         } else {
1536                 ir_node *irn, *call;
1537                 ir_type *mtp = get_conv_type(imode, omode, env);
1538
1539                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1540                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1541                 set_irn_pinned(call, get_irn_pinned(node));
1542                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1543
1544                 entry->low_word  = new_r_Proj(irn, low_unsigned, 0);
1545                 entry->high_word = new_r_Proj(irn, low_signed, 1);
1546         }
1547 }
1548
1549 /**
1550  * Translate a Conv from higher_unsigned
1551  */
1552 static void lower_Conv_from_Ll(ir_node *node, lower_env_t *env)
1553 {
1554         ir_node      *op    = get_Conv_op(node);
1555         ir_mode      *omode = get_irn_mode(node);
1556         ir_node      *block = get_nodes_block(node);
1557         dbg_info     *dbg   = get_irn_dbg_info(node);
1558         int          idx    = get_irn_idx(op);
1559         ir_graph     *irg   = current_ir_graph;
1560         node_entry_t *entry = env->entries[idx];
1561
1562         assert(idx < env->n_entries);
1563
1564         if (! entry->low_word) {
1565                 /* not ready yet, wait */
1566                 pdeq_putr(env->waitq, node);
1567                 return;
1568         }
1569
1570         if (mode_is_int(omode) || mode_is_reference(omode)) {
1571                 op = entry->low_word;
1572
1573                 /* simple case: create a high word */
1574                 if (omode != env->low_unsigned)
1575                         op = new_rd_Conv(dbg, block, op, omode);
1576
1577                 set_Conv_op(node, op);
1578         } else if (omode == mode_b) {
1579                 /* llu ? true : false  <=> (low|high) ? true : false */
1580                 ir_mode *mode = env->low_unsigned;
1581                 ir_node *or   = new_rd_Or(dbg, block, entry->low_word, entry->high_word,
1582                                           mode);
1583                 set_Conv_op(node, or);
1584         } else {
1585                 ir_node *irn, *call, *in[2];
1586                 ir_mode *imode = get_irn_mode(op);
1587                 ir_type *mtp   = get_conv_type(imode, omode, env);
1588
1589                 irn   = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1590                 in[0] = entry->low_word;
1591                 in[1] = entry->high_word;
1592
1593                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1594                 set_irn_pinned(call, get_irn_pinned(node));
1595                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1596
1597                 exchange(node, new_r_Proj(irn, omode, 0));
1598         }
1599 }
1600
1601 /**
1602  * Translate a Conv.
1603  */
1604 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env)
1605 {
1606         mode = get_irn_mode(node);
1607
1608         if (mode == env->high_signed
1609                         || mode == env->high_unsigned) {
1610                 lower_Conv_to_Ll(node, env);
1611         } else {
1612                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1613
1614                 if (mode == env->high_signed
1615                                 || mode == env->high_unsigned) {
1616                         lower_Conv_from_Ll(node, env);
1617                 }
1618         }
1619 }
1620
1621 /**
1622  * Lower the method type.
1623  *
1624  * @param mtp  the method type to lower
1625  * @param ent  the lower environment
1626  *
1627  * @return the lowered type
1628  */
1629 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env)
1630 {
1631         pmap_entry *entry;
1632         ident      *lid;
1633         ir_type    *res, *value_type;
1634
1635         if (is_lowered_type(mtp))
1636                 return mtp;
1637
1638         entry = pmap_find(lowered_type, mtp);
1639         if (! entry) {
1640                 int i, n, r, n_param, n_res;
1641
1642                 /* count new number of params */
1643                 n_param = n = get_method_n_params(mtp);
1644                 for (i = n_param - 1; i >= 0; --i) {
1645                         ir_type *tp = get_method_param_type(mtp, i);
1646
1647                         if (is_Primitive_type(tp)) {
1648                                 ir_mode *mode = get_type_mode(tp);
1649
1650                                 if (mode == env->high_signed ||
1651                                         mode == env->high_unsigned)
1652                                         ++n_param;
1653                         }  /* if */
1654                 }  /* for */
1655
1656                 /* count new number of results */
1657                 n_res = r = get_method_n_ress(mtp);
1658                 for (i = n_res - 1; i >= 0; --i) {
1659                         ir_type *tp = get_method_res_type(mtp, i);
1660
1661                         if (is_Primitive_type(tp)) {
1662                                 ir_mode *mode = get_type_mode(tp);
1663
1664                                 if (mode == env->high_signed ||
1665                                         mode == env->high_unsigned)
1666                                         ++n_res;
1667                         }  /* if */
1668                 }  /* for */
1669
1670                 res = new_type_method(n_param, n_res);
1671
1672                 /* set param types and result types */
1673                 for (i = n_param = 0; i < n; ++i) {
1674                         ir_type *tp = get_method_param_type(mtp, i);
1675
1676                         if (is_Primitive_type(tp)) {
1677                                 ir_mode *mode = get_type_mode(tp);
1678
1679                                 if (mode == env->high_signed) {
1680                                         set_method_param_type(res, n_param++, tp_u);
1681                                         set_method_param_type(res, n_param++, tp_s);
1682                                 } else if (mode == env->high_unsigned) {
1683                                         set_method_param_type(res, n_param++, tp_u);
1684                                         set_method_param_type(res, n_param++, tp_u);
1685                                 } else {
1686                                         set_method_param_type(res, n_param++, tp);
1687                                 }  /* if */
1688                         } else {
1689                                 set_method_param_type(res, n_param++, tp);
1690                         }  /* if */
1691                 }  /* for */
1692                 for (i = n_res = 0; i < r; ++i) {
1693                         ir_type *tp = get_method_res_type(mtp, i);
1694
1695                         if (is_Primitive_type(tp)) {
1696                                 ir_mode *mode = get_type_mode(tp);
1697
1698                                 if (mode == env->high_signed) {
1699                                         set_method_res_type(res, n_res++, tp_u);
1700                                         set_method_res_type(res, n_res++, tp_s);
1701                                 } else if (mode == env->high_unsigned) {
1702                                         set_method_res_type(res, n_res++, tp_u);
1703                                         set_method_res_type(res, n_res++, tp_u);
1704                                 } else {
1705                                         set_method_res_type(res, n_res++, tp);
1706                                 }  /* if */
1707                         } else {
1708                                 set_method_res_type(res, n_res++, tp);
1709                         }  /* if */
1710                 }  /* for */
1711                 set_lowered_type(mtp, res);
1712                 pmap_insert(lowered_type, mtp, res);
1713
1714                 value_type = get_method_value_param_type(mtp);
1715                 if (value_type != NULL) {
1716                         /* this creates a new value parameter type */
1717                         (void)get_method_value_param_ent(res, 0);
1718
1719                         /* set new param positions */
1720                         for (i = n_param = 0; i < n; ++i) {
1721                                 ir_type   *tp  = get_method_param_type(mtp, i);
1722                                 ident     *id  = get_method_param_ident(mtp, i);
1723                                 ir_entity *ent = get_method_value_param_ent(mtp, i);
1724
1725                                 set_entity_link(ent, INT_TO_PTR(n_param));
1726                                 if (is_Primitive_type(tp)) {
1727                                         ir_mode *mode = get_type_mode(tp);
1728
1729                                         if (mode == env->high_signed || mode == env->high_unsigned) {
1730                                                 if (id != NULL) {
1731                                                         lid = id_mangle(id, env->first_id);
1732                                                         set_method_param_ident(res, n_param, lid);
1733                                                         set_entity_ident(get_method_value_param_ent(res, n_param), lid);
1734                                                         lid = id_mangle(id, env->next_id);
1735                                                         set_method_param_ident(res, n_param + 1, lid);
1736                                                         set_entity_ident(get_method_value_param_ent(res, n_param + 1), lid);
1737                                                 }  /* if */
1738                                                 n_param += 2;
1739                                                 continue;
1740                                         }  /* if */
1741                                 }  /* if */
1742                                 if (id != NULL) {
1743                                         set_method_param_ident(res, n_param, id);
1744                                         set_entity_ident(get_method_value_param_ent(res, n_param), id);
1745                                 }  /* if */
1746                                 ++n_param;
1747                         }  /* for */
1748
1749                         set_lowered_type(value_type, get_method_value_param_type(res));
1750                 }  /* if */
1751         } else {
1752                 res = entry->value;
1753         }  /* if */
1754         return res;
1755 }  /* lower_mtp */
1756
1757 /**
1758  * Translate a Return.
1759  */
1760 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env)
1761 {
1762         ir_graph  *irg = current_ir_graph;
1763         ir_entity *ent = get_irg_entity(irg);
1764         ir_type   *mtp = get_entity_type(ent);
1765         ir_node   **in;
1766         int       i, j, n, idx;
1767         int       need_conv = 0;
1768         (void) mode;
1769
1770         /* check if this return must be lowered */
1771         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1772                 ir_node *pred = get_Return_res(node, i);
1773                 ir_mode *mode = get_irn_op_mode(pred);
1774
1775                 if (mode == env->high_signed ||
1776                         mode == env->high_unsigned) {
1777                         idx = get_irn_idx(pred);
1778                         if (! env->entries[idx]->low_word) {
1779                                 /* not ready yet, wait */
1780                                 pdeq_putr(env->waitq, node);
1781                                 return;
1782                         }  /* if */
1783                         need_conv = 1;
1784                 }  /* if */
1785         }  /* for */
1786         if (! need_conv)
1787                 return;
1788
1789         ent = get_irg_entity(irg);
1790         mtp = get_entity_type(ent);
1791
1792         mtp = lower_mtp(mtp, env);
1793         set_entity_type(ent, mtp);
1794
1795         /* create a new in array */
1796         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1797         in[0] = get_Return_mem(node);
1798
1799         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1800                 ir_node *pred = get_Return_res(node, i);
1801
1802                 idx = get_irn_idx(pred);
1803                 assert(idx < env->n_entries);
1804
1805                 if (env->entries[idx]) {
1806                         in[++j] = env->entries[idx]->low_word;
1807                         in[++j] = env->entries[idx]->high_word;
1808                 } else {
1809                         in[++j] = pred;
1810                 }  /* if */
1811         }  /* for */
1812
1813         set_irn_in(node, j+1, in);
1814 }  /* lower_Return */
1815
1816 /**
1817  * Translate the parameters.
1818  */
1819 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env)
1820 {
1821         ir_graph  *irg = get_irn_irg(node);
1822         ir_entity *ent = get_irg_entity(irg);
1823         ir_type   *tp  = get_entity_type(ent);
1824         ir_type   *mtp;
1825         long      *new_projs;
1826         int       i, j, n_params, rem;
1827         ir_node   *proj, *args;
1828         (void) mode;
1829
1830         if (is_lowered_type(tp)) {
1831                 mtp = get_associated_type(tp);
1832         } else {
1833                 mtp = tp;
1834         }  /* if */
1835         assert(! is_lowered_type(mtp));
1836
1837         n_params = get_method_n_params(mtp);
1838         if (n_params <= 0)
1839                 return;
1840
1841         NEW_ARR_A(long, new_projs, n_params);
1842
1843         /* first check if we have parameters that must be fixed */
1844         for (i = j = 0; i < n_params; ++i, ++j) {
1845                 ir_type *tp = get_method_param_type(mtp, i);
1846
1847                 new_projs[i] = j;
1848                 if (is_Primitive_type(tp)) {
1849                         ir_mode *mode = get_type_mode(tp);
1850
1851                         if (mode == env->high_signed ||
1852                                 mode == env->high_unsigned)
1853                                 ++j;
1854                 }  /* if */
1855         }  /* for */
1856         if (i == j)
1857                 return;
1858
1859         mtp = lower_mtp(mtp, env);
1860         set_entity_type(ent, mtp);
1861
1862         /* switch off optimization for new Proj nodes or they might be CSE'ed
1863            with not patched one's */
1864         rem = get_optimize();
1865         set_optimize(0);
1866
1867         /* ok, fix all Proj's and create new ones */
1868         args = get_irg_args(irg);
1869         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1870                 ir_node *pred = get_Proj_pred(proj);
1871                 long proj_nr;
1872                 int idx;
1873                 ir_mode *mode;
1874                 dbg_info *dbg;
1875
1876                 /* do not visit this node again */
1877                 mark_irn_visited(proj);
1878
1879                 if (pred != args)
1880                         continue;
1881
1882                 proj_nr = get_Proj_proj(proj);
1883                 set_Proj_proj(proj, new_projs[proj_nr]);
1884
1885                 idx = get_irn_idx(proj);
1886                 if (env->entries[idx]) {
1887                         ir_mode *low_mode = env->low_unsigned;
1888
1889                         mode = get_irn_mode(proj);
1890
1891                         if (mode == env->high_signed) {
1892                                 mode = env->low_signed;
1893                         } else {
1894                                 mode = env->low_unsigned;
1895                         }  /* if */
1896
1897                         dbg = get_irn_dbg_info(proj);
1898                         env->entries[idx]->low_word  =
1899                                 new_rd_Proj(dbg, args, low_mode, new_projs[proj_nr]);
1900                         env->entries[idx]->high_word =
1901                                 new_rd_Proj(dbg, args, mode, new_projs[proj_nr] + 1);
1902                 }  /* if */
1903         }  /* for */
1904         set_optimize(rem);
1905 }  /* lower_Start */
1906
1907 /**
1908  * Translate a Call.
1909  */
1910 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env)
1911 {
1912         ir_type  *tp = get_Call_type(node);
1913         ir_type  *call_tp;
1914         ir_node  **in, *proj, *results;
1915         int      n_params, n_res, need_lower = 0;
1916         int      i, j;
1917         long     *res_numbers = NULL;
1918         (void) mode;
1919
1920         if (is_lowered_type(tp)) {
1921                 call_tp = get_associated_type(tp);
1922         } else {
1923                 call_tp = tp;
1924         }  /* if */
1925
1926         assert(! is_lowered_type(call_tp));
1927
1928         n_params = get_method_n_params(call_tp);
1929         for (i = 0; i < n_params; ++i) {
1930                 ir_type *tp = get_method_param_type(call_tp, i);
1931
1932                 if (is_Primitive_type(tp)) {
1933                         ir_mode *mode = get_type_mode(tp);
1934
1935                         if (mode == env->high_signed ||
1936                                 mode == env->high_unsigned) {
1937                                 need_lower = 1;
1938                                 break;
1939                         }  /* if */
1940                 }  /* if */
1941         }  /* for */
1942         n_res = get_method_n_ress(call_tp);
1943         if (n_res > 0) {
1944                 NEW_ARR_A(long, res_numbers, n_res);
1945
1946                 for (i = j = 0; i < n_res; ++i, ++j) {
1947                         ir_type *tp = get_method_res_type(call_tp, i);
1948
1949                         res_numbers[i] = j;
1950                         if (is_Primitive_type(tp)) {
1951                                 ir_mode *mode = get_type_mode(tp);
1952
1953                                 if (mode == env->high_signed ||
1954                                         mode == env->high_unsigned) {
1955                                         need_lower = 1;
1956                                         ++j;
1957                                 }  /* if */
1958                         }  /* if */
1959                 }  /* for */
1960         }  /* if */
1961
1962         if (! need_lower)
1963                 return;
1964
1965         /* let's lower it */
1966         call_tp = lower_mtp(call_tp, env);
1967         set_Call_type(node, call_tp);
1968
1969         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1970
1971         in[0] = get_Call_mem(node);
1972         in[1] = get_Call_ptr(node);
1973
1974         for (j = 2, i = 0; i < n_params; ++i) {
1975                 ir_node *pred = get_Call_param(node, i);
1976                 int     idx = get_irn_idx(pred);
1977
1978                 if (env->entries[idx]) {
1979                         if (! env->entries[idx]->low_word) {
1980                                 /* not ready yet, wait */
1981                                 pdeq_putr(env->waitq, node);
1982                                 return;
1983                         }
1984                         in[j++] = env->entries[idx]->low_word;
1985                         in[j++] = env->entries[idx]->high_word;
1986                 } else {
1987                         in[j++] = pred;
1988                 }  /* if */
1989         }  /* for */
1990
1991         set_irn_in(node, j, in);
1992
1993         /* fix the results */
1994         results = NULL;
1995         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1996                 long proj_nr = get_Proj_proj(proj);
1997
1998                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
1999                         /* found the result proj */
2000                         results = proj;
2001                         break;
2002                 }  /* if */
2003         }  /* for */
2004
2005         if (results) {    /* there are results */
2006                 int rem = get_optimize();
2007
2008                 /* switch off optimization for new Proj nodes or they might be CSE'ed
2009                    with not patched one's */
2010                 set_optimize(0);
2011                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
2012                         if (get_Proj_pred(proj) == results) {
2013                                 long proj_nr = get_Proj_proj(proj);
2014                                 int idx;
2015
2016                                 /* found a result */
2017                                 set_Proj_proj(proj, res_numbers[proj_nr]);
2018                                 idx = get_irn_idx(proj);
2019                                 if (env->entries[idx]) {
2020                                         ir_mode *mode = get_irn_mode(proj);
2021                                         ir_mode *low_mode = env->low_unsigned;
2022                                         dbg_info *dbg;
2023
2024                                         if (mode == env->high_signed) {
2025                                                 mode = env->low_signed;
2026                                         } else {
2027                                                 mode = env->low_unsigned;
2028                                         }  /* if */
2029
2030                                         dbg = get_irn_dbg_info(proj);
2031                                         env->entries[idx]->low_word  =
2032                                                 new_rd_Proj(dbg, results, low_mode, res_numbers[proj_nr]);
2033                                         env->entries[idx]->high_word =
2034                                                 new_rd_Proj(dbg, results, mode, res_numbers[proj_nr] + 1);
2035                                 }  /* if */
2036                                 mark_irn_visited(proj);
2037                         }  /* if */
2038                 }  /* for */
2039                 set_optimize(rem);
2040         }
2041 }  /* lower_Call */
2042
2043 /**
2044  * Translate an Unknown into two.
2045  */
2046 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env)
2047 {
2048         int      idx = get_irn_idx(node);
2049         ir_graph *irg = get_irn_irg(node);
2050         ir_mode  *low_mode = env->low_unsigned;
2051
2052         env->entries[idx]->low_word  = new_r_Unknown(irg, low_mode);
2053         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2054 }  /* lower_Unknown */
2055
2056 /**
2057  * Translate a Phi.
2058  *
2059  * First step: just create two templates
2060  */
2061 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env)
2062 {
2063         ir_mode  *mode_l = env->low_unsigned;
2064         ir_graph *irg = get_irn_irg(phi);
2065         ir_node  *block, *unk_l, *unk_h, *phi_l, *phi_h;
2066         ir_node  **inl, **inh;
2067         dbg_info *dbg;
2068         int      idx, i, arity = get_Phi_n_preds(phi);
2069         int      enq = 0;
2070
2071         idx = get_irn_idx(phi);
2072         if (env->entries[idx]->low_word) {
2073                 /* Phi nodes already build, check for inputs */
2074                 ir_node *phil = env->entries[idx]->low_word;
2075                 ir_node *phih = env->entries[idx]->high_word;
2076
2077                 for (i = 0; i < arity; ++i) {
2078                         ir_node *pred = get_Phi_pred(phi, i);
2079                         int     idx = get_irn_idx(pred);
2080
2081                         if (env->entries[idx]->low_word) {
2082                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2083                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2084                         } else {
2085                                 /* still not ready */
2086                                 pdeq_putr(env->waitq, phi);
2087                                 return;
2088                         }  /* if */
2089                 }  /* for */
2090         }  /* if */
2091
2092         /* first create a new in array */
2093         NEW_ARR_A(ir_node *, inl, arity);
2094         NEW_ARR_A(ir_node *, inh, arity);
2095         unk_l = new_r_Unknown(irg, mode_l);
2096         unk_h = new_r_Unknown(irg, mode);
2097
2098         for (i = 0; i < arity; ++i) {
2099                 ir_node *pred = get_Phi_pred(phi, i);
2100                 int     idx = get_irn_idx(pred);
2101
2102                 if (env->entries[idx]->low_word) {
2103                         inl[i] = env->entries[idx]->low_word;
2104                         inh[i] = env->entries[idx]->high_word;
2105                 } else {
2106                         inl[i] = unk_l;
2107                         inh[i] = unk_h;
2108                         enq = 1;
2109                 }  /* if */
2110         }  /* for */
2111
2112         dbg   = get_irn_dbg_info(phi);
2113         block = get_nodes_block(phi);
2114
2115         idx = get_irn_idx(phi);
2116         assert(idx < env->n_entries);
2117         env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, block, arity, inl, mode_l);
2118         env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, block, arity, inh, mode);
2119
2120         /* Don't forget to link the new Phi nodes into the block.
2121          * Beware that some Phis might be optimized away. */
2122         if (is_Phi(phi_l))
2123                 add_Block_phi(block, phi_l);
2124         if (is_Phi(phi_h))
2125                 add_Block_phi(block, phi_h);
2126
2127         if (enq) {
2128                 /* not yet finished */
2129                 pdeq_putr(env->waitq, phi);
2130         }  /* if */
2131 }  /* lower_Phi */
2132
2133 /**
2134  * Translate a Mux.
2135  */
2136 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env)
2137 {
2138         ir_node  *block, *val;
2139         ir_node  *true_l, *true_h, *false_l, *false_h, *sel;
2140         dbg_info *dbg;
2141         int      idx;
2142
2143         val = get_Mux_true(mux);
2144         idx = get_irn_idx(val);
2145         if (env->entries[idx]->low_word) {
2146                 /* Values already build */
2147                 true_l = env->entries[idx]->low_word;
2148                 true_h = env->entries[idx]->high_word;
2149         } else {
2150                 /* still not ready */
2151                 pdeq_putr(env->waitq, mux);
2152                 return;
2153         }  /* if */
2154
2155         val = get_Mux_false(mux);
2156         idx = get_irn_idx(val);
2157         if (env->entries[idx]->low_word) {
2158                 /* Values already build */
2159                 false_l = env->entries[idx]->low_word;
2160                 false_h = env->entries[idx]->high_word;
2161         } else {
2162                 /* still not ready */
2163                 pdeq_putr(env->waitq, mux);
2164                 return;
2165         }  /* if */
2166
2167
2168         sel = get_Mux_sel(mux);
2169
2170         dbg   = get_irn_dbg_info(mux);
2171         block = get_nodes_block(mux);
2172
2173         idx = get_irn_idx(mux);
2174         assert(idx < env->n_entries);
2175         env->entries[idx]->low_word  = new_rd_Mux(dbg, block, sel, false_l, true_l, env->low_unsigned);
2176         env->entries[idx]->high_word = new_rd_Mux(dbg, block, sel, false_h, true_h, mode);
2177 }  /* lower_Mux */
2178
2179 /**
2180  * Translate an ASM node.
2181  */
2182 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env)
2183 {
2184         ir_mode *his = env->high_signed;
2185         ir_mode *hiu = env->high_unsigned;
2186         int      i;
2187         ir_node *n;
2188
2189         (void)mode;
2190
2191         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2192                 ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
2193                 if (op_mode == his || op_mode == hiu) {
2194                         panic("lowering ASM unimplemented");
2195                 }  /* if */
2196         }  /* for */
2197
2198         for (n = asmn;;) {
2199                 ir_mode *proj_mode;
2200
2201                 n = get_irn_link(n);
2202                 if (n == NULL)
2203                         break;
2204
2205                 proj_mode = get_irn_mode(n);
2206                 if (proj_mode == his || proj_mode == hiu) {
2207                         panic("lowering ASM unimplemented");
2208                 }  /* if */
2209         }  /* for */
2210 }  /* lower_ASM */
2211
2212 /**
2213  * Translate a Sel node.
2214  */
2215 static void lower_Sel(ir_node *sel, ir_mode *mode, lower_env_t *env)
2216 {
2217         (void) mode;
2218
2219         /* we must only lower value parameter Sels if we change the
2220            value parameter type. */
2221         if (env->value_param_tp != NULL) {
2222                 ir_entity *ent = get_Sel_entity(sel);
2223             if (get_entity_owner(ent) == env->value_param_tp) {
2224                         int pos = PTR_TO_INT(get_entity_link(ent));
2225
2226                         ent = get_method_value_param_ent(env->l_mtp, pos);
2227                         set_Sel_entity(sel, ent);
2228                 }  /* if */
2229         }  /* if */
2230 }  /* lower_Sel */
2231
2232 /**
2233  * check for opcodes that must always be lowered.
2234  */
2235 static int always_lower(ir_opcode code)
2236 {
2237         switch (code) {
2238         case iro_ASM:
2239         case iro_Proj:
2240         case iro_Start:
2241         case iro_Call:
2242         case iro_Return:
2243         case iro_Cond:
2244         case iro_Conv:
2245         case iro_Sel:
2246                 return 1;
2247         default:
2248                 return 0;
2249         }  /* switch */
2250 }  /* always_lower */
2251
2252 /**
2253  * lower boolean Proj(Cmp)
2254  */
2255 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env)
2256 {
2257         int      lidx, ridx;
2258         ir_node  *l, *r, *low, *high, *t, *res;
2259         pn_Cmp   pnc;
2260         ir_node  *blk;
2261         dbg_info *db;
2262
2263         l    = get_Cmp_left(cmp);
2264         lidx = get_irn_idx(l);
2265         if (! env->entries[lidx]->low_word) {
2266                 /* still not ready */
2267                 return NULL;
2268         }  /* if */
2269
2270         r    = get_Cmp_right(cmp);
2271         ridx = get_irn_idx(r);
2272         if (! env->entries[ridx]->low_word) {
2273                 /* still not ready */
2274                 return NULL;
2275         }  /* if */
2276
2277         pnc  = get_Proj_proj(proj);
2278         blk  = get_nodes_block(cmp);
2279         db   = get_irn_dbg_info(cmp);
2280         low  = new_rd_Cmp(db, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2281         high = new_rd_Cmp(db, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2282
2283         if (pnc == pn_Cmp_Eq) {
2284                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2285                 res = new_rd_And(db, blk,
2286                         new_r_Proj(low, mode_b, pnc),
2287                         new_r_Proj(high, mode_b, pnc),
2288                         mode_b);
2289         } else if (pnc == pn_Cmp_Lg) {
2290                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2291                 res = new_rd_Or(db, blk,
2292                         new_r_Proj(low, mode_b, pnc),
2293                         new_r_Proj(high, mode_b, pnc),
2294                         mode_b);
2295         } else {
2296                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2297                 t = new_rd_And(db, blk,
2298                         new_r_Proj(low, mode_b, pnc),
2299                         new_r_Proj(high, mode_b, pn_Cmp_Eq),
2300                         mode_b);
2301                 res = new_rd_Or(db, blk,
2302                         new_r_Proj(high, mode_b, pnc & ~pn_Cmp_Eq),
2303                         t,
2304                         mode_b);
2305         }  /* if */
2306         return res;
2307 }  /* lower_boolean_Proj_Cmp */
2308
2309 /**
2310  * The type of a lower function.
2311  *
2312  * @param node   the node to be lowered
2313  * @param mode   the low mode for the destination node
2314  * @param env    the lower environment
2315  */
2316 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2317
2318 /**
2319  * Lower a node.
2320  */
2321 static void lower_ops(ir_node *node, void *env)
2322 {
2323         lower_env_t  *lenv = env;
2324         node_entry_t *entry;
2325         int          idx = get_irn_idx(node);
2326         ir_mode      *mode = get_irn_mode(node);
2327
2328         if (mode == mode_b || is_Mux(node) || is_Conv(node)) {
2329                 int i;
2330
2331                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2332                         ir_node *proj = get_irn_n(node, i);
2333
2334                         if (is_Proj(proj)) {
2335                                 ir_node *cmp = get_Proj_pred(proj);
2336
2337                                 if (is_Cmp(cmp)) {
2338                                         ir_node *arg = get_Cmp_left(cmp);
2339
2340                                         mode = get_irn_mode(arg);
2341                                         if (mode == lenv->high_signed ||
2342                                                 mode == lenv->high_unsigned) {
2343                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2344
2345                                                 if (res == NULL) {
2346                                                         /* could not lower because predecessors not ready */
2347                                                         waitq_put(lenv->waitq, node);
2348                                                         return;
2349                                                 }  /* if */
2350                                                 set_irn_n(node, i, res);
2351                                         }  /* if */
2352                                 }  /* if */
2353                         }  /* if */
2354                 }  /* for */
2355         }  /* if */
2356
2357         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2358         if (entry || always_lower(get_irn_opcode(node))) {
2359                 ir_op      *op = get_irn_op(node);
2360                 lower_func func = (lower_func)op->ops.generic;
2361
2362                 if (func) {
2363                         mode = get_irn_op_mode(node);
2364
2365                         if (mode == lenv->high_signed)
2366                                 mode = lenv->low_signed;
2367                         else
2368                                 mode = lenv->low_unsigned;
2369
2370                         DB((dbg, LEVEL_1, "  %+F\n", node));
2371                         func(node, mode, lenv);
2372                 }  /* if */
2373         }  /* if */
2374 }  /* lower_ops */
2375
2376 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2377
2378 /**
2379  * Compare two op_mode_entry_t's.
2380  */
2381 static int cmp_op_mode(const void *elt, const void *key, size_t size)
2382 {
2383         const op_mode_entry_t *e1 = elt;
2384         const op_mode_entry_t *e2 = key;
2385         (void) size;
2386
2387         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2388 }  /* cmp_op_mode */
2389
2390 /**
2391  * Compare two conv_tp_entry_t's.
2392  */
2393 static int cmp_conv_tp(const void *elt, const void *key, size_t size)
2394 {
2395         const conv_tp_entry_t *e1 = elt;
2396         const conv_tp_entry_t *e2 = key;
2397         (void) size;
2398
2399         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2400 }  /* cmp_conv_tp */
2401
2402 /**
2403  * Enter a lowering function into an ir_op.
2404  */
2405 static void enter_lower_func(ir_op *op, lower_func func)
2406 {
2407         op->ops.generic = (op_func)func;
2408 }  /* enter_lower_func */
2409
2410 /**
2411  * Returns non-zero if a method type must be lowered.
2412  *
2413  * @param mtp  the method type
2414  */
2415 static int mtp_must_be_lowered(ir_type *mtp, lower_env_t *env)
2416 {
2417         int i, n_params;
2418
2419         n_params = get_method_n_params(mtp);
2420         if (n_params <= 0)
2421                 return 0;
2422
2423         /* first check if we have parameters that must be fixed */
2424         for (i = 0; i < n_params; ++i) {
2425                 ir_type *tp = get_method_param_type(mtp, i);
2426
2427                 if (is_Primitive_type(tp)) {
2428                         ir_mode *mode = get_type_mode(tp);
2429
2430                         if (mode == env->high_signed ||
2431                                 mode == env->high_unsigned)
2432                                 return 1;
2433                 }  /* if */
2434         }  /* for */
2435         return 0;
2436 }
2437
2438 static void setup_modes(lower_env_t *env)
2439 {
2440         unsigned           size_bits           = env->params->doubleword_size;
2441         ir_mode           *doubleword_signed   = NULL;
2442         ir_mode           *doubleword_unsigned = NULL;
2443         int                n_modes             = get_irp_n_modes();
2444         ir_mode_arithmetic arithmetic;
2445         unsigned           modulo_shift;
2446         int                i;
2447
2448         /* search for doubleword modes... */
2449         for (i = 0; i < n_modes; ++i) {
2450                 ir_mode *mode = get_irp_mode(i);
2451                 if (!mode_is_int(mode))
2452                         continue;
2453                 if (get_mode_size_bits(mode) != size_bits)
2454                         continue;
2455                 if (mode_is_signed(mode)) {
2456                         if (doubleword_signed != NULL) {
2457                                 /* sigh - the lowerer should really just lower all mode with
2458                                  * size_bits it finds. Unfortunately this required a bigger
2459                                  * rewrite. */
2460                                 panic("multiple double word signed modes found");
2461                         }
2462                         doubleword_signed = mode;
2463                 } else {
2464                         if (doubleword_unsigned != NULL) {
2465                                 /* sigh - the lowerer should really just lower all mode with
2466                                  * size_bits it finds. Unfortunately this required a bigger
2467                                  * rewrite. */
2468                                 panic("multiple double word unsigned modes found");
2469                         }
2470                         doubleword_unsigned = mode;
2471                 }
2472         }
2473         if (doubleword_signed == NULL || doubleword_unsigned == NULL) {
2474                 panic("Couldn't find doubleword modes");
2475         }
2476
2477         arithmetic   = get_mode_arithmetic(doubleword_signed);
2478         modulo_shift = get_mode_modulo_shift(doubleword_signed);
2479
2480         assert(get_mode_size_bits(doubleword_unsigned) == size_bits);
2481         assert(size_bits % 2 == 0);
2482         assert(get_mode_sign(doubleword_signed) == 1);
2483         assert(get_mode_sign(doubleword_unsigned) == 0);
2484         assert(get_mode_sort(doubleword_signed) == irms_int_number);
2485         assert(get_mode_sort(doubleword_unsigned) == irms_int_number);
2486         assert(get_mode_arithmetic(doubleword_unsigned) == arithmetic);
2487         assert(get_mode_modulo_shift(doubleword_unsigned) == modulo_shift);
2488
2489         /* try to guess a sensible modulo shift for the new mode.
2490          * (This is IMO another indication that this should really be a node
2491          *  attribute instead of a mode thing) */
2492         if (modulo_shift == size_bits) {
2493                 modulo_shift = modulo_shift / 2;
2494         } else if (modulo_shift == 0) {
2495                 /* fine */
2496         } else {
2497                 panic("Don't know what new modulo shift to use for lowered doubleword mode");
2498         }
2499         size_bits /= 2;
2500
2501         /* produce lowered modes */
2502         env->high_signed   = doubleword_signed;
2503         env->high_unsigned = doubleword_unsigned;
2504         env->low_signed    = new_ir_mode("WS", irms_int_number, size_bits, 1,
2505                                          arithmetic, modulo_shift);
2506         env->low_unsigned  = new_ir_mode("WU", irms_int_number, size_bits, 0,
2507                                          arithmetic, modulo_shift);
2508 }
2509
2510 /*
2511  * Do the lowering.
2512  */
2513 void lower_dw_ops(const lwrdw_param_t *param)
2514 {
2515         lower_env_t lenv;
2516         int         i;
2517         ir_graph    *rem;
2518
2519         if (! param)
2520                 return;
2521
2522         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2523
2524         memset(&lenv, 0, sizeof(lenv));
2525         lenv.params = param;
2526         setup_modes(&lenv);
2527
2528         /* create the necessary maps */
2529         if (! intrinsic_fkt)
2530                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2531         if (! conv_types)
2532                 conv_types = new_set(cmp_conv_tp, 16);
2533         if (! lowered_type)
2534                 lowered_type = pmap_create();
2535
2536         /* create a primitive unsigned and signed type */
2537         if (! tp_u)
2538                 tp_u = get_type_for_mode(lenv.low_unsigned);
2539         if (! tp_s)
2540                 tp_s = get_type_for_mode(lenv.low_signed);
2541
2542         /* create method types for the created binop calls */
2543         if (! binop_tp_u) {
2544                 binop_tp_u = new_type_method(4, 2);
2545                 set_method_param_type(binop_tp_u, 0, tp_u);
2546                 set_method_param_type(binop_tp_u, 1, tp_u);
2547                 set_method_param_type(binop_tp_u, 2, tp_u);
2548                 set_method_param_type(binop_tp_u, 3, tp_u);
2549                 set_method_res_type(binop_tp_u, 0, tp_u);
2550                 set_method_res_type(binop_tp_u, 1, tp_u);
2551         }  /* if */
2552         if (! binop_tp_s) {
2553                 binop_tp_s = new_type_method(4, 2);
2554                 set_method_param_type(binop_tp_s, 0, tp_u);
2555                 set_method_param_type(binop_tp_s, 1, tp_s);
2556                 set_method_param_type(binop_tp_s, 2, tp_u);
2557                 set_method_param_type(binop_tp_s, 3, tp_s);
2558                 set_method_res_type(binop_tp_s, 0, tp_u);
2559                 set_method_res_type(binop_tp_s, 1, tp_s);
2560         }  /* if */
2561         if (! shiftop_tp_u) {
2562                 shiftop_tp_u = new_type_method(3, 2);
2563                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2564                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2565                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2566                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2567                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2568         }  /* if */
2569         if (! shiftop_tp_s) {
2570                 shiftop_tp_s = new_type_method(3, 2);
2571                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2572                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2573                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2574                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2575                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2576         }  /* if */
2577         if (! unop_tp_u) {
2578                 unop_tp_u = new_type_method(2, 2);
2579                 set_method_param_type(unop_tp_u, 0, tp_u);
2580                 set_method_param_type(unop_tp_u, 1, tp_u);
2581                 set_method_res_type(unop_tp_u, 0, tp_u);
2582                 set_method_res_type(unop_tp_u, 1, tp_u);
2583         }  /* if */
2584         if (! unop_tp_s) {
2585                 unop_tp_s = new_type_method(2, 2);
2586                 set_method_param_type(unop_tp_s, 0, tp_u);
2587                 set_method_param_type(unop_tp_s, 1, tp_s);
2588                 set_method_res_type(unop_tp_s, 0, tp_u);
2589                 set_method_res_type(unop_tp_s, 1, tp_s);
2590         }  /* if */
2591
2592         lenv.tv_mode_bytes = new_tarval_from_long(param->doubleword_size/(2*8), lenv.low_unsigned);
2593         lenv.tv_mode_bits  = new_tarval_from_long(param->doubleword_size/2, lenv.low_unsigned);
2594         lenv.waitq         = new_pdeq();
2595         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
2596         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
2597
2598         /* first clear the generic function pointer for all ops */
2599         clear_irp_opcodes_generic_func();
2600
2601 #define LOWER2(op, fkt)   enter_lower_func(op_##op, fkt)
2602 #define LOWER(op)         LOWER2(op, lower_##op)
2603 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2604 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2605
2606         /* the table of all operations that must be lowered follows */
2607         LOWER(ASM);
2608         LOWER(Load);
2609         LOWER(Store);
2610         LOWER(Const);
2611         LOWER(And);
2612         LOWER(Or);
2613         LOWER(Eor);
2614         LOWER(Not);
2615         LOWER(Cond);
2616         LOWER(Return);
2617         LOWER(Call);
2618         LOWER(Unknown);
2619         LOWER(Phi);
2620         LOWER(Mux);
2621         LOWER(Start);
2622
2623         LOWER_BIN(Add);
2624         LOWER_BIN(Sub);
2625         LOWER_BIN(Mul);
2626         LOWER(Shl);
2627         LOWER(Shr);
2628         LOWER(Shrs);
2629         LOWER(Rotl);
2630         LOWER(DivMod);
2631         LOWER(Div);
2632         LOWER(Mod);
2633         LOWER(Sel);
2634         LOWER_UN(Minus);
2635
2636         LOWER(Conv);
2637
2638 #undef LOWER_UN
2639 #undef LOWER_BIN
2640 #undef LOWER
2641 #undef LOWER2
2642
2643         /* transform all graphs */
2644         rem = current_ir_graph;
2645         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2646                 ir_graph  *irg = get_irp_irg(i);
2647                 ir_entity *ent;
2648                 ir_type   *mtp;
2649                 int n_idx;
2650
2651                 obstack_init(&lenv.obst);
2652
2653                 n_idx = get_irg_last_idx(irg);
2654                 n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2655                 lenv.n_entries = n_idx;
2656                 lenv.entries   = NEW_ARR_F(node_entry_t *, n_idx);
2657                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2658
2659                 lenv.l_mtp        = NULL;
2660                 lenv.flags        = 0;
2661                 lenv.proj_2_block = pmap_create();
2662                 lenv.value_param_tp = NULL;
2663                 ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2664
2665                 ent = get_irg_entity(irg);
2666                 mtp = get_entity_type(ent);
2667
2668                 if (mtp_must_be_lowered(mtp, &lenv)) {
2669                         ir_type *ltp = lower_mtp(mtp, &lenv);
2670                         lenv.flags |= MUST_BE_LOWERED;
2671                         set_entity_type(ent, ltp);
2672                         lenv.l_mtp = ltp;
2673                         lenv.value_param_tp = get_method_value_param_type(mtp);
2674                 }  /* if */
2675
2676                 /* first step: link all nodes and allocate data */
2677                 irg_walk_graph(irg, firm_clear_node_and_phi_links, prepare_links_and_handle_rotl, &lenv);
2678
2679                 if (lenv.flags & MUST_BE_LOWERED) {
2680                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2681
2682                         /* must do some work */
2683                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2684
2685                         /* last step: all waiting nodes */
2686                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2687                         current_ir_graph = irg;
2688                         while (! pdeq_empty(lenv.waitq)) {
2689                                 ir_node *node = pdeq_getl(lenv.waitq);
2690
2691                                 lower_ops(node, &lenv);
2692                         }  /* while */
2693
2694                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2695
2696                         /* outs are invalid, we changed the graph */
2697                         set_irg_outs_inconsistent(irg);
2698
2699                         if (lenv.flags & CF_CHANGED) {
2700                                 /* control flow changed, dominance info is invalid */
2701                                 set_irg_doms_inconsistent(irg);
2702                                 set_irg_extblk_inconsistent(irg);
2703                                 set_irg_loopinfo_inconsistent(irg);
2704                         }  /* if */
2705                 } else {
2706                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2707                 }  /* if */
2708                 pmap_destroy(lenv.proj_2_block);
2709                 DEL_ARR_F(lenv.entries);
2710                 obstack_free(&lenv.obst, NULL);
2711         }  /* for */
2712         del_pdeq(lenv.waitq);
2713         current_ir_graph = rem;
2714 }  /* lower_dw_ops */
2715
2716 /* Default implementation. */
2717 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2718                                     const ir_mode *imode, const ir_mode *omode,
2719                                     void *context)
2720 {
2721         char buf[64];
2722         ident *id;
2723         ir_entity *ent;
2724         (void) context;
2725
2726         if (imode == omode) {
2727                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2728         } else {
2729                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2730                         get_mode_name(imode), get_mode_name(omode));
2731         }  /* if */
2732         id = new_id_from_str(buf);
2733
2734         ent = new_entity(get_glob_type(), id, method);
2735         set_entity_ld_ident(ent, get_entity_ident(ent));
2736         return ent;
2737 }  /* def_create_intrinsic_fkt */