nsz Git - libfirm/blob - lower_dw.c

   1 /*
   2  * Copyright (C) 1995-2011 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, i.e. 64bit -> 32bit, 32bit -> 16bit etc.
  23  * @date    8.10.2004
  24  * @author  Michael Beck
  25  */
  26 #include "config.h"
  27
  28 #include <string.h>
  29 #include <stdlib.h>
  30 #include <stdbool.h>
  31 #include <assert.h>
  32
  33 #include "be.h"
  34 #include "error.h"
  35 #include "lowering.h"
  36 #include "irnode_t.h"
  37 #include "irnodeset.h"
  38 #include "irgraph_t.h"
  39 #include "irmode_t.h"
  40 #include "iropt_t.h"
  41 #include "irgmod.h"
  42 #include "tv_t.h"
  43 #include "dbginfo_t.h"
  44 #include "iropt_dbg.h"
  45 #include "irflag_t.h"
  46 #include "firmstat.h"
  47 #include "irgwalk.h"
  48 #include "ircons.h"
  49 #include "irflag.h"
  50 #include "iroptimize.h"
  51 #include "irtools.h"
  52 #include "debug.h"
  53 #include "set.h"
  54 #include "pmap.h"
  55 #include "pdeq.h"
  56 #include "irdump.h"
  57 #include "array_t.h"
  58 #include "irpass_t.h"
  59 #include "lower_dw.h"
  60
  61 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  62 static set *intrinsic_fkt;
  63
  64 /** A map from (imode, omode) to conv function types. */
  65 static set *conv_types;
  66
  67 /** A map from a method type to its lowered type. */
  68 static pmap *lowered_type;
  69
  70 /** A map from a builtin type to its lower and higher type. */
  71 static pmap *lowered_builtin_type_high;
  72 static pmap *lowered_builtin_type_low;
  73
  74 /** The types for the binop and unop intrinsics. */
  75 static ir_type *binop_tp_u, *binop_tp_s, *unop_tp_u, *unop_tp_s, *tp_s, *tp_u;
  76
  77 static ir_nodeset_t created_mux_nodes;
  78
  79 /** the debug handle */
  80 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  81
  82 /**
  83  * An entry in the (op, imode, omode) -> entity map.
  84  */
  85 typedef struct op_mode_entry {
  86         const ir_op   *op;    /**< the op */
  87         const ir_mode *imode; /**< the input mode */
  88         const ir_mode *omode; /**< the output mode */
  89         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  90 } op_mode_entry_t;
  91
  92 /**
  93  * An entry in the (imode, omode) -> tp map.
  94  */
  95 typedef struct conv_tp_entry {
  96         const ir_mode *imode; /**< the input mode */
  97         const ir_mode *omode; /**< the output mode */
  98         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
  99 } conv_tp_entry_t;
 100
 101 enum lower_flags {
 102         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 103         CF_CHANGED      = 2,  /**< control flow was changed */
 104 };
 105
 106 /**
 107  * The lower environment.
 108  */
 109 typedef struct lower_dw_env_t {
 110         lower64_entry_t **entries;     /**< entries per node */
 111         ir_graph      *irg;
 112         struct obstack obst;           /**< an obstack holding the temporary data */
 113         ir_tarval *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 114         ir_tarval *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 115         pdeq      *waitq;              /**< a wait queue of all nodes that must be handled later */
 116         ir_node  **lowered_phis;       /**< list of lowered phis */
 117         ir_mode   *high_signed;        /**< doubleword signed type */
 118         ir_mode   *high_unsigned;      /**< doubleword unsigned type */
 119         ir_mode   *low_signed;         /**< word signed type */
 120         ir_mode   *low_unsigned;       /**< word unsigned type */
 121         ident     *first_id;           /**< .l for little and .h for big endian */
 122         ident     *next_id;            /**< .h for little and .l for big endian */
 123         const lwrdw_param_t *params;   /**< transformation parameter */
 124         unsigned flags;                /**< some flags */
 125         unsigned n_entries;            /**< number of entries */
 126 } lower_dw_env_t;
 127
 128 static lower_dw_env_t *env;
 129
 130 static void lower_node(ir_node *node);
 131
 132 /**
 133  * Create a method type for a Conv emulation from imode to omode.
 134  */
 135 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode)
 136 {
 137         conv_tp_entry_t key, *entry;
 138         ir_type *mtd;
 139
 140         key.imode = imode;
 141         key.omode = omode;
 142         key.mtd   = NULL;
 143
 144         entry = set_insert(conv_tp_entry_t, conv_types, &key, sizeof(key), hash_ptr(imode) ^ hash_ptr(omode));
 145         if (! entry->mtd) {
 146                 int n_param = 1, n_res = 1;
 147
 148                 if (imode == env->high_signed || imode == env->high_unsigned)
 149                         n_param = 2;
 150                 if (omode == env->high_signed || omode == env->high_unsigned)
 151                         n_res = 2;
 152
 153                 /* create a new one */
 154                 mtd = new_type_method(n_param, n_res);
 155
 156                 /* set param types and result types */
 157                 n_param = 0;
 158                 if (imode == env->high_signed) {
 159                         if (env->params->little_endian) {
 160                                 set_method_param_type(mtd, n_param++, tp_u);
 161                                 set_method_param_type(mtd, n_param++, tp_s);
 162                         } else {
 163                                 set_method_param_type(mtd, n_param++, tp_s);
 164                                 set_method_param_type(mtd, n_param++, tp_u);
 165                         }
 166                 } else if (imode == env->high_unsigned) {
 167                         set_method_param_type(mtd, n_param++, tp_u);
 168                         set_method_param_type(mtd, n_param++, tp_u);
 169                 } else {
 170                         ir_type *tp = get_type_for_mode(imode);
 171                         set_method_param_type(mtd, n_param++, tp);
 172                 }
 173
 174                 n_res = 0;
 175                 if (omode == env->high_signed) {
 176                         if (env->params->little_endian) {
 177                                 set_method_res_type(mtd, n_res++, tp_u);
 178                                 set_method_res_type(mtd, n_res++, tp_s);
 179                         } else {
 180                                 set_method_res_type(mtd, n_res++, tp_s);
 181                                 set_method_res_type(mtd, n_res++, tp_u);
 182                         }
 183                 } else if (omode == env->high_unsigned) {
 184                         set_method_res_type(mtd, n_res++, tp_u);
 185                         set_method_res_type(mtd, n_res++, tp_u);
 186                 } else {
 187                         ir_type *tp = get_type_for_mode(omode);
 188                         set_method_res_type(mtd, n_res++, tp);
 189                 }
 190                 entry->mtd = mtd;
 191         } else {
 192                 mtd = entry->mtd;
 193         }
 194         return mtd;
 195 }
 196
 197 /**
 198  * Add an additional control flow input to a block.
 199  * Patch all Phi nodes. The new Phi inputs are copied from
 200  * old input number nr.
 201  */
 202 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 203 {
 204         int i, arity = get_irn_arity(block);
 205         ir_node **in;
 206
 207         assert(nr < arity);
 208
 209         NEW_ARR_A(ir_node *, in, arity + 1);
 210         for (i = 0; i < arity; ++i)
 211                 in[i] = get_irn_n(block, i);
 212         in[i] = cf;
 213
 214         set_irn_in(block, i + 1, in);
 215
 216         foreach_out_edge(block, edge) {
 217                 ir_node *phi = get_edge_src_irn(edge);
 218                 if (!is_Phi(phi))
 219                         continue;
 220
 221                 for (i = 0; i < arity; ++i)
 222                         in[i] = get_irn_n(phi, i);
 223                 in[i] = in[nr];
 224                 set_irn_in(phi, i + 1, in);
 225         }
 226 }
 227
 228 /**
 229  * Add an additional control flow input to a block.
 230  * Patch all Phi nodes. The new Phi inputs are copied from
 231  * old input from cf tmpl.
 232  */
 233 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 234 {
 235         int i, arity = get_irn_arity(block);
 236         int nr = 0;
 237
 238         for (i = 0; i < arity; ++i) {
 239                 if (get_irn_n(block, i) == tmpl) {
 240                         nr = i;
 241                         break;
 242                 }
 243         }
 244         assert(i < arity);
 245         add_block_cf_input_nr(block, nr, cf);
 246 }
 247
 248 /**
 249  * Return the "operational" mode of a Firm node.
 250  */
 251 static ir_mode *get_irn_op_mode(ir_node *node)
 252 {
 253         switch (get_irn_opcode(node)) {
 254         case iro_Load:
 255                 return get_Load_mode(node);
 256         case iro_Store:
 257                 return get_irn_mode(get_Store_value(node));
 258         case iro_Div:
 259                 return get_irn_mode(get_Div_left(node));
 260         case iro_Mod:
 261                 return get_irn_mode(get_Mod_left(node));
 262         case iro_Cmp:
 263                 return get_irn_mode(get_Cmp_left(node));
 264         default:
 265                 return get_irn_mode(node);
 266         }
 267 }
 268
 269 /**
 270  * Walker, prepare the node links and determine which nodes need to be lowered
 271  * at all.
 272  */
 273 static void prepare_links(ir_node *node)
 274 {
 275         ir_mode         *mode = get_irn_op_mode(node);
 276         lower64_entry_t *link;
 277
 278         if (mode == env->high_signed || mode == env->high_unsigned) {
 279                 unsigned idx = get_irn_idx(node);
 280                 /* ok, found a node that will be lowered */
 281                 link = OALLOCZ(&env->obst, lower64_entry_t);
 282
 283                 if (idx >= env->n_entries) {
 284                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 285                         unsigned old   = env->n_entries;
 286                         unsigned n_idx = idx + (idx >> 3);
 287
 288                         ARR_RESIZE(lower64_entry_t *, env->entries, n_idx);
 289                         memset(&env->entries[old], 0, (n_idx - old) * sizeof(env->entries[0]));
 290                         env->n_entries = n_idx;
 291                 }
 292                 env->entries[idx] = link;
 293                 env->flags |= MUST_BE_LOWERED;
 294         } else if (is_Conv(node)) {
 295                 /* Conv nodes have two modes */
 296                 ir_node *pred = get_Conv_op(node);
 297                 mode = get_irn_mode(pred);
 298
 299                 if (mode == env->high_signed || mode == env->high_unsigned) {
 300                         /* must lower this node either but don't need a link */
 301                         env->flags |= MUST_BE_LOWERED;
 302                 }
 303                 return;
 304         } else if (is_Call(node)) {
 305                 /* Special case:  If the result of the Call is never used, we won't
 306                  * find a Proj with a mode that potentially triggers MUST_BE_LOWERED
 307                  * to be set.  Thus, if we see a call, we check its result types and
 308                  * decide whether MUST_BE_LOWERED has to be set.
 309                  */
 310                 ir_type *tp = get_Call_type(node);
 311                 size_t   n_res, i;
 312
 313                 n_res = get_method_n_ress(tp);
 314                 for (i = 0; i < n_res; ++i) {
 315                         ir_type *rtp = get_method_res_type(tp, i);
 316
 317                         if (is_Primitive_type(rtp)) {
 318                                 ir_mode *rmode = get_type_mode(rtp);
 319
 320                                 if (rmode == env->high_signed || rmode == env->high_unsigned) {
 321                                         env->flags |= MUST_BE_LOWERED;
 322                                 }
 323                         }
 324                 }
 325         }
 326 }
 327
 328 lower64_entry_t *get_node_entry(ir_node *node)
 329 {
 330         unsigned idx = get_irn_idx(node);
 331         assert(idx < env->n_entries);
 332         return env->entries[idx];
 333 }
 334
 335 void ir_set_dw_lowered(ir_node *old, ir_node *new_low, ir_node *new_high)
 336 {
 337         lower64_entry_t *entry = get_node_entry(old);
 338         entry->low_word  = new_low;
 339         entry->high_word = new_high;
 340 }
 341
 342 ir_mode *ir_get_low_unsigned_mode(void)
 343 {
 344         return env->low_unsigned;
 345 }
 346
 347 /**
 348  * Translate a Constant: create two.
 349  */
 350 static void lower_Const(ir_node *node, ir_mode *mode)
 351 {
 352         ir_graph  *irg      = get_irn_irg(node);
 353         dbg_info  *dbg      = get_irn_dbg_info(node);
 354         ir_mode   *low_mode = env->low_unsigned;
 355         ir_tarval *tv       = get_Const_tarval(node);
 356         ir_tarval *tv_l     = tarval_convert_to(tv, low_mode);
 357         ir_node   *res_low  = new_rd_Const(dbg, irg, tv_l);
 358         ir_tarval *tv_shrs  = tarval_shrs(tv, env->tv_mode_bits);
 359         ir_tarval *tv_h     = tarval_convert_to(tv_shrs, mode);
 360         ir_node   *res_high = new_rd_Const(dbg, irg, tv_h);
 361
 362         ir_set_dw_lowered(node, res_low, res_high);
 363 }
 364
 365 /**
 366  * Translate a Load: create two.
 367  */
 368 static void lower_Load(ir_node *node, ir_mode *mode)
 369 {
 370         ir_mode    *low_mode = env->low_unsigned;
 371         ir_graph   *irg = get_irn_irg(node);
 372         ir_node    *adr = get_Load_ptr(node);
 373         ir_node    *mem = get_Load_mem(node);
 374         ir_node    *low;
 375         ir_node    *high;
 376         ir_node    *proj_m;
 377         dbg_info   *dbg;
 378         ir_node    *block = get_nodes_block(node);
 379         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 380                                  ? cons_volatile : cons_none;
 381
 382         if (env->params->little_endian) {
 383                 low  = adr;
 384                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 385         } else {
 386                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 387                 high = adr;
 388         }
 389
 390         /* create two loads */
 391         dbg    = get_irn_dbg_info(node);
 392         low    = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 393         proj_m = new_r_Proj(low, mode_M, pn_Load_M);
 394         high   = new_rd_Load(dbg, block, proj_m, high, mode, volatility);
 395
 396         foreach_out_edge_safe(node, edge) {
 397                 ir_node *proj = get_edge_src_irn(edge);
 398                 if (!is_Proj(proj))
 399                         continue;
 400
 401                 switch (get_Proj_proj(proj)) {
 402                 case pn_Load_M:         /* Memory result. */
 403                         /* put it to the second one */
 404                         set_Proj_pred(proj, high);
 405                         break;
 406                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 407                         /* put it to the first one */
 408                         set_Proj_pred(proj, low);
 409                         break;
 410                 case pn_Load_res: {       /* Result of load operation. */
 411                         ir_node *res_low  = new_r_Proj(low,  low_mode, pn_Load_res);
 412                         ir_node *res_high = new_r_Proj(high, mode,     pn_Load_res);
 413                         ir_set_dw_lowered(proj, res_low, res_high);
 414                         break;
 415                 }
 416                 default:
 417                         assert(0 && "unexpected Proj number");
 418                 }
 419                 /* mark this proj: we have handled it already, otherwise we might fall
 420                  * into out new nodes. */
 421                 mark_irn_visited(proj);
 422         }
 423 }
 424
 425 /**
 426  * Translate a Store: create two.
 427  */
 428 static void lower_Store(ir_node *node, ir_mode *mode)
 429 {
 430         ir_graph              *irg;
 431         ir_node               *block, *adr, *mem;
 432         ir_node               *low, *high, *proj_m;
 433         dbg_info              *dbg;
 434         ir_node               *value = get_Store_value(node);
 435         const lower64_entry_t *entry = get_node_entry(value);
 436         ir_cons_flags volatility = get_Store_volatility(node) == volatility_is_volatile
 437                                    ? cons_volatile : cons_none;
 438         (void) mode;
 439
 440         assert(entry);
 441
 442         if (! entry->low_word) {
 443                 /* not ready yet, wait */
 444                 pdeq_putr(env->waitq, node);
 445                 return;
 446         }
 447
 448         irg = get_irn_irg(node);
 449         adr = get_Store_ptr(node);
 450         mem = get_Store_mem(node);
 451         block = get_nodes_block(node);
 452
 453         if (env->params->little_endian) {
 454                 low  = adr;
 455                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 456         } else {
 457                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 458                 high = adr;
 459         }
 460
 461         /* create two Stores */
 462         dbg    = get_irn_dbg_info(node);
 463         low    = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 464         proj_m = new_r_Proj(low, mode_M, pn_Store_M);
 465         high   = new_rd_Store(dbg, block, proj_m, high, entry->high_word, volatility);
 466
 467         foreach_out_edge_safe(node, edge) {
 468                 ir_node *proj = get_edge_src_irn(edge);
 469                 if (!is_Proj(proj))
 470                         continue;
 471
 472                 switch (get_Proj_proj(proj)) {
 473                 case pn_Store_M:         /* Memory result. */
 474                         /* put it to the second one */
 475                         set_Proj_pred(proj, high);
 476                         break;
 477                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 478                         /* put it to the first one */
 479                         set_Proj_pred(proj, low);
 480                         break;
 481                 default:
 482                         assert(0 && "unexpected Proj number");
 483                 }
 484                 /* mark this proj: we have handled it already, otherwise we might fall into
 485                  * out new nodes. */
 486                 mark_irn_visited(proj);
 487         }
 488 }
 489
 490 /**
 491  * Return a node containing the address of the intrinsic emulation function.
 492  *
 493  * @param method  the method type of the emulation function
 494  * @param op      the emulated ir_op
 495  * @param imode   the input mode of the emulated opcode
 496  * @param omode   the output mode of the emulated opcode
 497  * @param env     the lower environment
 498  */
 499 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 500                                       ir_mode *imode, ir_mode *omode)
 501 {
 502         symconst_symbol sym;
 503         ir_entity *ent;
 504         op_mode_entry_t key, *entry;
 505
 506         key.op    = op;
 507         key.imode = imode;
 508         key.omode = omode;
 509         key.ent   = NULL;
 510
 511         entry = set_insert(op_mode_entry_t, intrinsic_fkt, &key, sizeof(key),
 512                                 hash_ptr(op) ^ hash_ptr(imode) ^ (hash_ptr(omode) << 8));
 513         if (! entry->ent) {
 514                 /* create a new one */
 515                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 516
 517                 assert(ent && "Intrinsic creator must return an entity");
 518                 entry->ent = ent;
 519         } else {
 520                 ent = entry->ent;
 521         }
 522         sym.entity_p = ent;
 523         return new_r_SymConst(env->irg, mode_P_code, sym, symconst_addr_ent);
 524 }
 525
 526 /**
 527  * Translate a Div.
 528  *
 529  * Create an intrinsic Call.
 530  */
 531 static void lower_Div(ir_node *node, ir_mode *mode)
 532 {
 533         ir_node  *left   = get_Div_left(node);
 534         ir_node  *right  = get_Div_right(node);
 535         ir_node  *block  = get_nodes_block(node);
 536         dbg_info *dbgi   = get_irn_dbg_info(node);
 537         ir_type  *mtp    = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 538         ir_mode  *opmode = get_irn_op_mode(node);
 539         ir_node  *addr   = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode);
 540         ir_node  *in[4];
 541         ir_node  *call;
 542         ir_node  *resproj;
 543
 544         if (env->params->little_endian) {
 545                 in[0] = get_lowered_low(left);
 546                 in[1] = get_lowered_high(left);
 547                 in[2] = get_lowered_low(right);
 548                 in[3] = get_lowered_high(right);
 549         } else {
 550                 in[0] = get_lowered_high(left);
 551                 in[1] = get_lowered_low(left);
 552                 in[2] = get_lowered_high(right);
 553                 in[3] = get_lowered_low(right);
 554         }
 555         call    = new_rd_Call(dbgi, block, get_Div_mem(node), addr, 4, in, mtp);
 556         resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
 557         set_irn_pinned(call, get_irn_pinned(node));
 558
 559         foreach_out_edge_safe(node, edge) {
 560                 ir_node *proj = get_edge_src_irn(edge);
 561                 if (!is_Proj(proj))
 562                         continue;
 563
 564                 switch (get_Proj_proj(proj)) {
 565                 case pn_Div_M:         /* Memory result. */
 566                         /* reroute to the call */
 567                         set_Proj_pred(proj, call);
 568                         set_Proj_proj(proj, pn_Call_M);
 569                         break;
 570                 case pn_Div_X_regular:
 571                         set_Proj_pred(proj, call);
 572                         set_Proj_proj(proj, pn_Call_X_regular);
 573                         break;
 574                 case pn_Div_X_except:
 575                         set_Proj_pred(proj, call);
 576                         set_Proj_proj(proj, pn_Call_X_except);
 577                         break;
 578                 case pn_Div_res:
 579                         if (env->params->little_endian) {
 580                                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 581                                 ir_node *res_high = new_r_Proj(resproj, mode,              1);
 582                                 ir_set_dw_lowered(proj, res_low, res_high);
 583                         } else {
 584                                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 1);
 585                                 ir_node *res_high = new_r_Proj(resproj, mode,              0);
 586                                 ir_set_dw_lowered(proj, res_low, res_high);
 587                         }
 588                         break;
 589                 default:
 590                         assert(0 && "unexpected Proj number");
 591                 }
 592                 /* mark this proj: we have handled it already, otherwise we might fall into
 593                  * out new nodes. */
 594                 mark_irn_visited(proj);
 595         }
 596 }
 597
 598 /**
 599  * Translate a Mod.
 600  *
 601  * Create an intrinsic Call.
 602  */
 603 static void lower_Mod(ir_node *node, ir_mode *mode)
 604 {
 605         ir_node  *left   = get_Mod_left(node);
 606         ir_node  *right  = get_Mod_right(node);
 607         dbg_info *dbgi   = get_irn_dbg_info(node);
 608         ir_node  *block  = get_nodes_block(node);
 609         ir_type  *mtp    = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 610         ir_mode  *opmode = get_irn_op_mode(node);
 611         ir_node  *addr   = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode);
 612         ir_node  *in[4];
 613         ir_node  *call;
 614         ir_node  *resproj;
 615
 616         if (env->params->little_endian) {
 617                 in[0] = get_lowered_low(left);
 618                 in[1] = get_lowered_high(left);
 619                 in[2] = get_lowered_low(right);
 620                 in[3] = get_lowered_high(right);
 621         } else {
 622                 in[0] = get_lowered_high(left);
 623                 in[1] = get_lowered_low(left);
 624                 in[2] = get_lowered_high(right);
 625                 in[3] = get_lowered_low(right);
 626         }
 627         call    = new_rd_Call(dbgi, block, get_Mod_mem(node), addr, 4, in, mtp);
 628         resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
 629         set_irn_pinned(call, get_irn_pinned(node));
 630
 631         foreach_out_edge_safe(node, edge) {
 632                 ir_node *proj = get_edge_src_irn(edge);
 633                 if (!is_Proj(proj))
 634                         continue;
 635
 636                 switch (get_Proj_proj(proj)) {
 637                 case pn_Mod_M:         /* Memory result. */
 638                         /* reroute to the call */
 639                         set_Proj_pred(proj, call);
 640                         set_Proj_proj(proj, pn_Call_M);
 641                         break;
 642                 case pn_Div_X_regular:
 643                         set_Proj_pred(proj, call);
 644                         set_Proj_proj(proj, pn_Call_X_regular);
 645                         break;
 646                 case pn_Mod_X_except:
 647                         set_Proj_pred(proj, call);
 648                         set_Proj_proj(proj, pn_Call_X_except);
 649                         break;
 650                 case pn_Mod_res:
 651                         if (env->params->little_endian) {
 652                                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 653                                 ir_node *res_high = new_r_Proj(resproj, mode,              1);
 654                                 ir_set_dw_lowered(proj, res_low, res_high);
 655                         } else {
 656                                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 1);
 657                                 ir_node *res_high = new_r_Proj(resproj, mode,              0);
 658                                 ir_set_dw_lowered(proj, res_low, res_high);
 659                         }
 660                         break;
 661                 default:
 662                         assert(0 && "unexpected Proj number");
 663                 }
 664                 /* mark this proj: we have handled it already, otherwise we might fall
 665                  * into out new nodes. */
 666                 mark_irn_visited(proj);
 667         }
 668 }
 669
 670 /**
 671  * Translate a binop.
 672  *
 673  * Create an intrinsic Call.
 674  */
 675 static void lower_binop(ir_node *node, ir_mode *mode)
 676 {
 677         ir_node  *left  = get_binop_left(node);
 678         ir_node  *right = get_binop_right(node);
 679         dbg_info *dbgi  = get_irn_dbg_info(node);
 680         ir_node  *block = get_nodes_block(node);
 681         ir_graph *irg   = get_irn_irg(block);
 682         ir_type  *mtp   = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 683         ir_node  *addr  = get_intrinsic_address(mtp, get_irn_op(node), mode, mode);
 684         ir_node  *in[4];
 685         ir_node  *call;
 686         ir_node  *resproj;
 687
 688         if (env->params->little_endian) {
 689                 in[0] = get_lowered_low(left);
 690                 in[1] = get_lowered_high(left);
 691                 in[2] = get_lowered_low(right);
 692                 in[3] = get_lowered_high(right);
 693         } else {
 694                 in[0] = get_lowered_high(left);
 695                 in[1] = get_lowered_low(left);
 696                 in[2] = get_lowered_high(right);
 697                 in[3] = get_lowered_low(right);
 698         }
 699         call    = new_rd_Call(dbgi, block, get_irg_no_mem(irg), addr, 4, in, mtp);
 700         resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
 701         set_irn_pinned(call, get_irn_pinned(node));
 702
 703         if (env->params->little_endian) {
 704                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 705                 ir_node *res_high = new_r_Proj(resproj, mode,              1);
 706                 ir_set_dw_lowered(node, res_low, res_high);
 707         } else {
 708                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 1);
 709                 ir_node *res_high = new_r_Proj(resproj, mode,              0);
 710                 ir_set_dw_lowered(node, res_low, res_high);
 711         }
 712 }
 713
 714 static ir_node *create_conv(ir_node *block, ir_node *node, ir_mode *dest_mode)
 715 {
 716         if (get_irn_mode(node) == dest_mode)
 717                 return node;
 718         return new_r_Conv(block, node, dest_mode);
 719 }
 720
 721 /**
 722  * Moves node and all predecessors of node from from_bl to to_bl.
 723  * Does not move predecessors of Phi nodes (or block nodes).
 724  */
 725 static void move(ir_node *node, ir_node *from_bl, ir_node *to_bl)
 726 {
 727         int i, arity;
 728
 729         /* move this node */
 730         set_nodes_block(node, to_bl);
 731
 732         /* move its Projs */
 733         if (get_irn_mode(node) == mode_T) {
 734                 foreach_out_edge(node, edge) {
 735                         ir_node *proj = get_edge_src_irn(edge);
 736                         if (!is_Proj(proj))
 737                                 continue;
 738                         move(proj, from_bl, to_bl);
 739                 }
 740         }
 741
 742         /* We must not move predecessors of Phi nodes, even if they are in
 743          * from_bl. (because these are values from an earlier loop iteration
 744          * which are not predecessors of node here)
 745          */
 746         if (is_Phi(node))
 747                 return;
 748
 749         /* recursion ... */
 750         arity = get_irn_arity(node);
 751         for (i = 0; i < arity; i++) {
 752                 ir_node *pred      = get_irn_n(node, i);
 753                 ir_mode *pred_mode = get_irn_mode(pred);
 754                 if (get_nodes_block(pred) == from_bl)
 755                         move(pred, from_bl, to_bl);
 756                 if (pred_mode == env->high_signed || pred_mode == env->high_unsigned) {
 757                         ir_node *pred_low  = get_lowered_low(pred);
 758                         ir_node *pred_high = get_lowered_high(pred);
 759                         if (get_nodes_block(pred_low) == from_bl)
 760                                 move(pred_low, from_bl, to_bl);
 761                         if (pred_high != NULL && get_nodes_block(pred_high) == from_bl)
 762                                 move(pred_high, from_bl, to_bl);
 763                 }
 764         }
 765 }
 766
 767 /**
 768  * We need a custom version of part_block_edges because during transformation
 769  * not all data-dependencies are explicit yet if a lowered nodes users are not
 770  * lowered yet.
 771  * We can fix this by modifying move to look for such implicit dependencies.
 772  * Additionally we have to keep the proj_2_block map updated
 773  */
 774 static ir_node *part_block_dw(ir_node *node)
 775 {
 776         ir_graph *irg        = get_irn_irg(node);
 777         ir_node  *old_block  = get_nodes_block(node);
 778         int       n_cfgpreds = get_Block_n_cfgpreds(old_block);
 779         ir_node **cfgpreds   = get_Block_cfgpred_arr(old_block);
 780         ir_node  *new_block  = new_r_Block(irg, n_cfgpreds, cfgpreds);
 781
 782         /* old_block has no predecessors anymore for now */
 783         set_irn_in(old_block, 0, NULL);
 784
 785         /* move node and its predecessors to new_block */
 786         move(node, old_block, new_block);
 787
 788         /* move Phi nodes to new_block */
 789         foreach_out_edge_safe(old_block, edge) {
 790                 ir_node *phi = get_edge_src_irn(edge);
 791                 if (!is_Phi(phi))
 792                         continue;
 793                 set_nodes_block(phi, new_block);
 794         }
 795         return old_block;
 796 }
 797
 798 typedef ir_node* (*new_rd_shr_func)(dbg_info *dbgi, ir_node *block,
 799                                     ir_node *left, ir_node *right,
 800                                     ir_mode *mode);
 801
 802 static void lower_shr_helper(ir_node *node, ir_mode *mode,
 803                              new_rd_shr_func new_rd_shrs)
 804 {
 805         ir_node  *right         = get_binop_right(node);
 806         ir_node  *left          = get_binop_left(node);
 807         ir_mode  *shr_mode      = get_irn_mode(node);
 808         unsigned  modulo_shift  = get_mode_modulo_shift(shr_mode);
 809         ir_mode  *low_unsigned  = env->low_unsigned;
 810         unsigned  modulo_shift2 = get_mode_modulo_shift(mode);
 811         ir_graph *irg           = get_irn_irg(node);
 812         ir_node  *left_low      = get_lowered_low(left);
 813         ir_node  *left_high     = get_lowered_high(left);
 814         dbg_info *dbgi          = get_irn_dbg_info(node);
 815         ir_node  *lower_block;
 816         ir_node  *block;
 817         ir_node  *cnst;
 818         ir_node  *andn;
 819         ir_node  *cmp;
 820         ir_node  *cond;
 821         ir_node  *proj_true;
 822         ir_node  *proj_false;
 823         ir_node  *phi_low;
 824         ir_node  *phi_high;
 825         ir_node  *lower_in[2];
 826         ir_node  *phi_low_in[2];
 827         ir_node  *phi_high_in[2];
 828
 829         /* this version is optimized for modulo shift architectures
 830          * (and can't handle anything else) */
 831         if (modulo_shift != get_mode_size_bits(shr_mode)
 832                         || modulo_shift2<<1 != modulo_shift) {
 833                 panic("Shr lowering only implemented for modulo shift shr operations");
 834         }
 835         if (!is_po2(modulo_shift) || !is_po2(modulo_shift2)) {
 836                 panic("Shr lowering only implemented for power-of-2 modes");
 837         }
 838         /* without 2-complement the -x instead of (bit_width-x) trick won't work */
 839         if (get_mode_arithmetic(shr_mode) != irma_twos_complement) {
 840                 panic("Shr lowering only implemented for two-complement modes");
 841         }
 842
 843         block = get_nodes_block(node);
 844
 845         /* if the right operand is a 64bit value, we're only interested in the
 846          * lower word */
 847         if (get_irn_mode(right) == env->high_unsigned) {
 848                 right = get_lowered_low(right);
 849         } else {
 850                 /* shift should never have signed mode on the right */
 851                 assert(get_irn_mode(right) != env->high_signed);
 852                 right = create_conv(block, right, low_unsigned);
 853         }
 854
 855         lower_block = part_block_dw(node);
 856         env->flags |= CF_CHANGED;
 857         block = get_nodes_block(node);
 858
 859         /* add a Cmp to test if highest bit is set <=> whether we shift more
 860          * than half the word width */
 861         cnst       = new_r_Const_long(irg, low_unsigned, modulo_shift2);
 862         andn       = new_r_And(block, right, cnst, low_unsigned);
 863         cnst       = new_r_Const(irg, get_mode_null(low_unsigned));
 864         cmp        = new_rd_Cmp(dbgi, block, andn, cnst, ir_relation_equal);
 865         cond       = new_rd_Cond(dbgi, block, cmp);
 866         proj_true  = new_r_Proj(cond, mode_X, pn_Cond_true);
 867         proj_false = new_r_Proj(cond, mode_X, pn_Cond_false);
 868
 869         /* the true block => shift_width < 1word */
 870         {
 871                 /* In theory the low value (for 64bit shifts) is:
 872                  *    Or(High << (32-x)), Low >> x)
 873                  * In practice High << 32-x will fail when x is zero (since we have
 874                  * modulo shift and 32 will be 0). So instead we use:
 875                  *    Or(High<<1<<~x, Low >> x)
 876                  */
 877                 ir_node *in[1]        = { proj_true };
 878                 ir_node *block_true   = new_r_Block(irg, ARRAY_SIZE(in), in);
 879                 ir_node *res_high     = new_rd_shrs(dbgi, block_true, left_high,
 880                                                     right, mode);
 881                 ir_node *shift_low    = new_rd_Shr(dbgi, block_true, left_low, right,
 882                                                    low_unsigned);
 883                 ir_node *not_shiftval = new_rd_Not(dbgi, block_true, right,
 884                                                    low_unsigned);
 885                 ir_node *conv         = create_conv(block_true, left_high,
 886                                                     low_unsigned);
 887                 ir_node *one          = new_r_Const(irg, get_mode_one(low_unsigned));
 888                 ir_node *carry0       = new_rd_Shl(dbgi, block_true, conv, one,
 889                                                    low_unsigned);
 890                 ir_node *carry1       = new_rd_Shl(dbgi, block_true, carry0,
 891                                                    not_shiftval, low_unsigned);
 892                 ir_node *res_low      = new_rd_Or(dbgi, block_true, shift_low, carry1,
 893                                                   low_unsigned);
 894                 lower_in[0]           = new_r_Jmp(block_true);
 895                 phi_low_in[0]         = res_low;
 896                 phi_high_in[0]        = res_high;
 897         }
 898
 899         /* false block => shift_width > 1word */
 900         {
 901                 ir_node *in[1]       = { proj_false };
 902                 ir_node *block_false = new_r_Block(irg, ARRAY_SIZE(in), in);
 903                 ir_node *conv        = create_conv(block_false, left_high, low_unsigned);
 904                 ir_node *res_low     = new_rd_shrs(dbgi, block_false, conv, right,
 905                                                    low_unsigned);
 906                 int      cnsti       = modulo_shift2-1;
 907                 ir_node *cnst2       = new_r_Const_long(irg, low_unsigned, cnsti);
 908                 ir_node *res_high;
 909                 if (new_rd_shrs == new_rd_Shrs) {
 910                         res_high = new_rd_shrs(dbgi, block_false, left_high, cnst2, mode);
 911                 } else {
 912                         res_high = new_r_Const(irg, get_mode_null(mode));
 913                 }
 914                 lower_in[1]          = new_r_Jmp(block_false);
 915                 phi_low_in[1]        = res_low;
 916                 phi_high_in[1]       = res_high;
 917         }
 918
 919         /* patch lower block */
 920         set_irn_in(lower_block, ARRAY_SIZE(lower_in), lower_in);
 921         phi_low  = new_r_Phi(lower_block, ARRAY_SIZE(phi_low_in), phi_low_in,
 922                              low_unsigned);
 923         phi_high = new_r_Phi(lower_block, ARRAY_SIZE(phi_high_in), phi_high_in,
 924                              mode);
 925         ir_set_dw_lowered(node, phi_low, phi_high);
 926 }
 927
 928 static void lower_Shr(ir_node *node, ir_mode *mode)
 929 {
 930         lower_shr_helper(node, mode, new_rd_Shr);
 931 }
 932
 933 static void lower_Shrs(ir_node *node, ir_mode *mode)
 934 {
 935         lower_shr_helper(node, mode, new_rd_Shrs);
 936 }
 937
 938 static void lower_Shl(ir_node *node, ir_mode *mode)
 939 {
 940         ir_node  *right         = get_binop_right(node);
 941         ir_node  *left          = get_binop_left(node);
 942         ir_mode  *shr_mode      = get_irn_mode(node);
 943         unsigned  modulo_shift  = get_mode_modulo_shift(shr_mode);
 944         ir_mode  *low_unsigned  = env->low_unsigned;
 945         unsigned  modulo_shift2 = get_mode_modulo_shift(mode);
 946         ir_graph *irg           = get_irn_irg(node);
 947         ir_node  *left_low      = get_lowered_low(left);
 948         ir_node  *left_high     = get_lowered_high(left);
 949         dbg_info *dbgi          = get_irn_dbg_info(node);
 950         ir_node  *lower_block   = get_nodes_block(node);
 951         ir_node  *block;
 952         ir_node  *cnst;
 953         ir_node  *andn;
 954         ir_node  *cmp;
 955         ir_node  *cond;
 956         ir_node  *proj_true;
 957         ir_node  *proj_false;
 958         ir_node  *phi_low;
 959         ir_node  *phi_high;
 960         ir_node  *lower_in[2];
 961         ir_node  *phi_low_in[2];
 962         ir_node  *phi_high_in[2];
 963
 964         /* this version is optimized for modulo shift architectures
 965          * (and can't handle anything else) */
 966         if (modulo_shift != get_mode_size_bits(shr_mode)
 967                         || modulo_shift2<<1 != modulo_shift) {
 968                 panic("Shl lowering only implemented for modulo shift shl operations");
 969         }
 970         if (!is_po2(modulo_shift) || !is_po2(modulo_shift2)) {
 971                 panic("Shl lowering only implemented for power-of-2 modes");
 972         }
 973         /* without 2-complement the -x instead of (bit_width-x) trick won't work */
 974         if (get_mode_arithmetic(shr_mode) != irma_twos_complement) {
 975                 panic("Shl lowering only implemented for two-complement modes");
 976         }
 977
 978         /* if the right operand is a 64bit value, we're only interested in the
 979          * lower word */
 980         if (get_irn_mode(right) == env->high_unsigned) {
 981                 right = get_lowered_low(right);
 982         } else {
 983                 /* shift should never have signed mode on the right */
 984                 assert(get_irn_mode(right) != env->high_signed);
 985                 right = create_conv(lower_block, right, low_unsigned);
 986         }
 987
 988         part_block_dw(node);
 989         env->flags |= CF_CHANGED;
 990         block = get_nodes_block(node);
 991
 992         /* add a Cmp to test if highest bit is set <=> whether we shift more
 993          * than half the word width */
 994         cnst       = new_r_Const_long(irg, low_unsigned, modulo_shift2);
 995         andn       = new_r_And(block, right, cnst, low_unsigned);
 996         cnst       = new_r_Const(irg, get_mode_null(low_unsigned));
 997         cmp        = new_rd_Cmp(dbgi, block, andn, cnst, ir_relation_equal);
 998         cond       = new_rd_Cond(dbgi, block, cmp);
 999         proj_true  = new_r_Proj(cond, mode_X, pn_Cond_true);
1000         proj_false = new_r_Proj(cond, mode_X, pn_Cond_false);
1001
1002         /* the true block => shift_width < 1word */
1003         {
1004                 ir_node *in[1]        = { proj_true };
1005                 ir_node *block_true   = new_r_Block(irg, ARRAY_SIZE(in), in);
1006
1007                 ir_node *res_low      = new_rd_Shl(dbgi, block_true, left_low,
1008                                                    right, low_unsigned);
1009                 ir_node *shift_high   = new_rd_Shl(dbgi, block_true, left_high, right,
1010                                                    mode);
1011                 ir_node *not_shiftval = new_rd_Not(dbgi, block_true, right,
1012                                                    low_unsigned);
1013                 ir_node *conv         = create_conv(block_true, left_low, mode);
1014                 ir_node *one          = new_r_Const(irg, get_mode_one(low_unsigned));
1015                 ir_node *carry0       = new_rd_Shr(dbgi, block_true, conv, one, mode);
1016                 ir_node *carry1       = new_rd_Shr(dbgi, block_true, carry0,
1017                                                    not_shiftval, mode);
1018                 ir_node *res_high     = new_rd_Or(dbgi, block_true, shift_high, carry1,
1019                                                   mode);
1020                 lower_in[0]           = new_r_Jmp(block_true);
1021                 phi_low_in[0]         = res_low;
1022                 phi_high_in[0]        = res_high;
1023         }
1024
1025         /* false block => shift_width > 1word */
1026         {
1027                 ir_node *in[1]       = { proj_false };
1028                 ir_node *block_false = new_r_Block(irg, ARRAY_SIZE(in), in);
1029                 ir_node *res_low     = new_r_Const(irg, get_mode_null(low_unsigned));
1030                 ir_node *conv        = create_conv(block_false, left_low, mode);
1031                 ir_node *res_high    = new_rd_Shl(dbgi, block_false, conv, right, mode);
1032                 lower_in[1]          = new_r_Jmp(block_false);
1033                 phi_low_in[1]        = res_low;
1034                 phi_high_in[1]       = res_high;
1035         }
1036
1037         /* patch lower block */
1038         set_irn_in(lower_block, ARRAY_SIZE(lower_in), lower_in);
1039         phi_low  = new_r_Phi(lower_block, ARRAY_SIZE(phi_low_in), phi_low_in,
1040                              low_unsigned);
1041         phi_high = new_r_Phi(lower_block, ARRAY_SIZE(phi_high_in), phi_high_in,
1042                              mode);
1043         ir_set_dw_lowered(node, phi_low, phi_high);
1044 }
1045
1046 /**
1047  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1048  */
1049 static void prepare_links_and_handle_rotl(ir_node *node, void *data)
1050 {
1051         (void) data;
1052         if (is_Rotl(node)) {
1053                 ir_mode  *mode = get_irn_op_mode(node);
1054                 ir_node  *right;
1055                 ir_node  *left, *shl, *shr, *ornode, *block, *sub, *c;
1056                 ir_mode  *omode, *rmode;
1057                 ir_graph *irg;
1058                 dbg_info *dbg;
1059                 optimization_state_t state;
1060
1061                 if (mode != env->high_signed && mode != env->high_unsigned) {
1062                         prepare_links(node);
1063                         return;
1064                 }
1065
1066                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) */
1067                 right = get_Rotl_right(node);
1068                 irg   = get_irn_irg(node);
1069                 dbg   = get_irn_dbg_info(node);
1070                 omode = get_irn_mode(node);
1071                 left  = get_Rotl_left(node);
1072                 block = get_nodes_block(node);
1073                 shl   = new_rd_Shl(dbg, block, left, right, omode);
1074                 rmode = get_irn_mode(right);
1075                 c     = new_r_Const_long(irg, rmode, get_mode_size_bits(omode));
1076                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
1077                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
1078
1079                 /* switch optimization off here, or we will get the Rotl back */
1080                 save_optimization_state(&state);
1081                 set_opt_algebraic_simplification(0);
1082                 ornode = new_rd_Or(dbg, block, shl, shr, omode);
1083                 restore_optimization_state(&state);
1084
1085                 exchange(node, ornode);
1086
1087                 /* do lowering on the new nodes */
1088                 prepare_links(shl);
1089                 prepare_links(c);
1090                 prepare_links(sub);
1091                 prepare_links(shr);
1092                 prepare_links(ornode);
1093                 return;
1094         }
1095
1096         prepare_links(node);
1097 }
1098
1099 /**
1100  * Translate an Unop.
1101  *
1102  * Create an intrinsic Call.
1103  */
1104 static void lower_unop(ir_node *node, ir_mode *mode)
1105 {
1106         ir_node  *op       = get_unop_op(node);
1107         dbg_info *dbgi     = get_irn_dbg_info(node);
1108         ir_node  *block    = get_nodes_block(node);
1109         ir_graph *irg      = get_irn_irg(block);
1110         ir_type  *mtp      = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1111         ir_op    *irop     = get_irn_op(node);
1112         ir_node  *addr     = get_intrinsic_address(mtp, irop, mode, mode);
1113         ir_node  *nomem    = get_irg_no_mem(irg);
1114         ir_node  *in[2];
1115         ir_node  *call;
1116         ir_node  *resproj;
1117
1118         if (env->params->little_endian) {
1119                 in[0] = get_lowered_low(op);
1120                 in[1] = get_lowered_high(op);
1121         } else {
1122                 in[0] = get_lowered_high(op);
1123                 in[1] = get_lowered_low(op);
1124         }
1125         call    = new_rd_Call(dbgi, block, nomem, addr, 2, in, mtp);
1126         resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
1127         set_irn_pinned(call, get_irn_pinned(node));
1128
1129         if (env->params->little_endian) {
1130                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
1131                 ir_node *res_high = new_r_Proj(resproj, mode,              1);
1132                 ir_set_dw_lowered(node, res_low, res_high);
1133         } else {
1134                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 1);
1135                 ir_node *res_high = new_r_Proj(resproj, mode,              0);
1136                 ir_set_dw_lowered(node, res_low, res_high);
1137         }
1138 }
1139
1140 /**
1141  * Translate a logical binop.
1142  *
1143  * Create two logical binops.
1144  */
1145 static void lower_binop_logical(ir_node *node, ir_mode *mode,
1146                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) )
1147 {
1148         ir_node               *left        = get_binop_left(node);
1149         ir_node               *right       = get_binop_right(node);
1150         const lower64_entry_t *left_entry  = get_node_entry(left);
1151         const lower64_entry_t *right_entry = get_node_entry(right);
1152         dbg_info              *dbgi        = get_irn_dbg_info(node);
1153         ir_node               *block       = get_nodes_block(node);
1154         ir_node               *res_low
1155                 = constr_rd(dbgi, block, left_entry->low_word, right_entry->low_word,
1156                             env->low_unsigned);
1157         ir_node               *res_high
1158                 = constr_rd(dbgi, block, left_entry->high_word, right_entry->high_word,
1159                             mode);
1160         ir_set_dw_lowered(node, res_low, res_high);
1161 }
1162
1163 static void lower_And(ir_node *node, ir_mode *mode)
1164 {
1165         lower_binop_logical(node, mode, new_rd_And);
1166 }
1167
1168 static void lower_Or(ir_node *node, ir_mode *mode)
1169 {
1170         lower_binop_logical(node, mode, new_rd_Or);
1171 }
1172
1173 static void lower_Eor(ir_node *node, ir_mode *mode)
1174 {
1175         lower_binop_logical(node, mode, new_rd_Eor);
1176 }
1177
1178 /**
1179  * Translate a Not.
1180  *
1181  * Create two logical Nots.
1182  */
1183 static void lower_Not(ir_node *node, ir_mode *mode)
1184 {
1185         ir_node               *op       = get_Not_op(node);
1186         const lower64_entry_t *op_entry = get_node_entry(op);
1187         dbg_info              *dbgi     = get_irn_dbg_info(node);
1188         ir_node               *block    = get_nodes_block(node);
1189         ir_node               *res_low
1190                 = new_rd_Not(dbgi, block, op_entry->low_word, env->low_unsigned);
1191         ir_node               *res_high
1192                 = new_rd_Not(dbgi, block, op_entry->high_word, mode);
1193         ir_set_dw_lowered(node, res_low, res_high);
1194 }
1195
1196 static void lower_Proj(ir_node *node, ir_mode *op_mode)
1197 {
1198         ir_mode *mode = get_irn_mode(node);
1199         ir_node *pred;
1200         (void)op_mode;
1201         if (mode != env->high_signed && mode != env->high_unsigned)
1202                 return;
1203         /* skip tuples */
1204         pred = get_Proj_pred(node);
1205         if (is_Tuple(pred)) {
1206                 long                   pn    = get_Proj_proj(node);
1207                 ir_node               *op    = get_irn_n(pred, pn);
1208                 const lower64_entry_t *entry = get_node_entry(op);
1209                 ir_set_dw_lowered(node, entry->low_word, entry->high_word);
1210         }
1211 }
1212
1213 static bool is_equality_cmp(const ir_node *node)
1214 {
1215         ir_relation relation = get_Cmp_relation(node);
1216         ir_node    *left     = get_Cmp_left(node);
1217         ir_node    *right    = get_Cmp_right(node);
1218         ir_mode    *mode     = get_irn_mode(left);
1219
1220         /* this probably makes no sense if unordered is involved */
1221         assert(!mode_is_float(mode));
1222
1223         if (relation == ir_relation_equal || relation == ir_relation_less_greater)
1224                 return true;
1225
1226         if (!is_Const(right) || !is_Const_null(right))
1227                 return false;
1228         if (mode_is_signed(mode)) {
1229                 return relation == ir_relation_less_greater;
1230         } else {
1231                 return relation == ir_relation_greater;
1232         }
1233 }
1234
1235 static ir_node *get_cfop_destination(const ir_node *cfop)
1236 {
1237         const ir_edge_t *first = get_irn_out_edge_first(cfop);
1238         /* we should only have 1 destination */
1239         assert(get_irn_n_edges(cfop) == 1);
1240         return get_edge_src_irn(first);
1241 }
1242
1243 static void lower_Switch(ir_node *node, ir_mode *high_mode)
1244 {
1245         ir_node *selector = get_Switch_selector(node);
1246         ir_mode *mode     = get_irn_mode(selector);
1247         (void)high_mode;
1248         if (mode == env->high_signed || mode == env->high_unsigned) {
1249                 /* we can't really handle Switch with 64bit offsets */
1250                 panic("Switch with 64bit jumptable not supported");
1251         }
1252         lower_node(selector);
1253 }
1254
1255 /**
1256  * Translate a Cond.
1257  */
1258 static void lower_Cond(ir_node *node, ir_mode *high_mode)
1259 {
1260         ir_node *left, *right, *block;
1261         ir_node *sel = get_Cond_selector(node);
1262         ir_mode *cmp_mode;
1263         const lower64_entry_t *lentry, *rentry;
1264         ir_node  *projT = NULL, *projF = NULL;
1265         ir_node  *new_bl, *irn;
1266         ir_node  *projHF, *projHT;
1267         ir_node  *dst_blk;
1268         ir_relation relation;
1269         ir_graph *irg;
1270         dbg_info *dbg;
1271
1272         (void) high_mode;
1273
1274         if (!is_Cmp(sel)) {
1275                 lower_node(sel);
1276                 return;
1277         }
1278
1279         left     = get_Cmp_left(sel);
1280         cmp_mode = get_irn_mode(left);
1281         if (cmp_mode != env->high_signed && cmp_mode != env->high_unsigned) {
1282                 lower_node(sel);
1283                 return;
1284         }
1285
1286         right  = get_Cmp_right(sel);
1287         lower_node(left);
1288         lower_node(right);
1289         lentry = get_node_entry(left);
1290         rentry = get_node_entry(right);
1291
1292         /* all right, build the code */
1293         foreach_out_edge_safe(node, edge) {
1294                 ir_node *proj    = get_edge_src_irn(edge);
1295                 long     proj_nr;
1296                 if (!is_Proj(proj))
1297                         continue;
1298                 proj_nr = get_Proj_proj(proj);
1299
1300                 if (proj_nr == pn_Cond_true) {
1301                         assert(projT == NULL && "more than one Proj(true)");
1302                         projT = proj;
1303                 } else {
1304                         assert(proj_nr == pn_Cond_false);
1305                         assert(projF == NULL && "more than one Proj(false)");
1306                         projF = proj;
1307                 }
1308                 mark_irn_visited(proj);
1309         }
1310         assert(projT && projF);
1311
1312         /* create a new high compare */
1313         block    = get_nodes_block(node);
1314         irg      = get_Block_irg(block);
1315         dbg      = get_irn_dbg_info(sel);
1316         relation = get_Cmp_relation(sel);
1317
1318         if (is_equality_cmp(sel)) {
1319                 /* x ==/!= y ==> or(x_low^y_low,x_high^y_high) ==/!= 0 */
1320                 ir_mode *mode       = env->low_unsigned;
1321                 ir_node *low_left   = new_rd_Conv(dbg, block, lentry->low_word, mode);
1322                 ir_node *high_left  = new_rd_Conv(dbg, block, lentry->high_word, mode);
1323                 ir_node *low_right  = new_rd_Conv(dbg, block, rentry->low_word, mode);
1324                 ir_node *high_right = new_rd_Conv(dbg, block, rentry->high_word, mode);
1325                 ir_node *xor_low    = new_rd_Eor(dbg, block, low_left, low_right, mode);
1326                 ir_node *xor_high   = new_rd_Eor(dbg, block, high_left, high_right, mode);
1327                 ir_node *ornode = new_rd_Or(dbg, block, xor_low, xor_high, mode);
1328                 ir_node *cmp    = new_rd_Cmp(dbg, block, ornode, new_r_Const(irg, get_mode_null(mode)), relation);
1329                 set_Cond_selector(node, cmp);
1330                 return;
1331         }
1332
1333         if (relation == ir_relation_equal) {
1334                 ir_node *proj;
1335                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1336                 dst_blk = get_cfop_destination(projF);
1337
1338                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1339                                  ir_relation_equal);
1340                 dbg = get_irn_dbg_info(node);
1341                 irn = new_rd_Cond(dbg, block, irn);
1342
1343                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1344                 mark_irn_visited(projHF);
1345                 exchange(projF, projHF);
1346
1347                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1348                 mark_irn_visited(projHT);
1349
1350                 new_bl = new_r_Block(irg, 1, &projHT);
1351
1352                 dbg = get_irn_dbg_info(sel);
1353                 irn = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word,
1354                                   ir_relation_equal);
1355                 dbg = get_irn_dbg_info(node);
1356                 irn = new_rd_Cond(dbg, new_bl, irn);
1357
1358                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1359                 mark_irn_visited(proj);
1360                 add_block_cf_input(dst_blk, projHF, proj);
1361
1362                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1363                 mark_irn_visited(proj);
1364                 exchange(projT, proj);
1365         } else if (relation == ir_relation_less_greater) {
1366                 ir_node *proj;
1367                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1368                 dst_blk = get_cfop_destination(projT);
1369
1370                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1371                                  ir_relation_less_greater);
1372                 dbg = get_irn_dbg_info(node);
1373                 irn = new_rd_Cond(dbg, block, irn);
1374
1375                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1376                 mark_irn_visited(projHT);
1377                 exchange(projT, projHT);
1378
1379                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1380                 mark_irn_visited(projHF);
1381
1382                 new_bl = new_r_Block(irg, 1, &projHF);
1383
1384                 dbg = get_irn_dbg_info(sel);
1385                 irn = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word,
1386                                  ir_relation_less_greater);
1387                 dbg = get_irn_dbg_info(node);
1388                 irn = new_rd_Cond(dbg, new_bl, irn);
1389
1390                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1391                 mark_irn_visited(proj);
1392                 add_block_cf_input(dst_blk, projHT, proj);
1393
1394                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1395                 mark_irn_visited(proj);
1396                 exchange(projF, proj);
1397         } else {
1398                 ir_node *proj;
1399                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1400                 ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1401                 ir_node *projEqF;
1402
1403                 dstT = get_cfop_destination(projT);
1404                 dstF = get_cfop_destination(projF);
1405
1406                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1407                                  relation & ~ir_relation_equal);
1408                 dbg = get_irn_dbg_info(node);
1409                 irn = new_rd_Cond(dbg, block, irn);
1410
1411                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1412                 mark_irn_visited(projHT);
1413
1414                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1415                 mark_irn_visited(projHF);
1416
1417                 newbl_eq = new_r_Block(irg, 1, &projHF);
1418
1419                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1420                                  ir_relation_equal);
1421                 irn = new_rd_Cond(dbg, newbl_eq, irn);
1422
1423                 projEqF = new_r_Proj(irn, mode_X, pn_Cond_false);
1424                 mark_irn_visited(projEqF);
1425
1426                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1427                 mark_irn_visited(proj);
1428
1429                 newbl_l = new_r_Block(irg, 1, &proj);
1430
1431                 dbg = get_irn_dbg_info(sel);
1432                 irn = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word,
1433                                  relation);
1434                 dbg = get_irn_dbg_info(node);
1435                 irn = new_rd_Cond(dbg, newbl_l, irn);
1436
1437                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1438                 mark_irn_visited(proj);
1439                 add_block_cf_input(dstT, projT, proj);
1440
1441                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1442                 mark_irn_visited(proj);
1443                 add_block_cf_input(dstF, projF, proj);
1444
1445                 exchange(projT, projHT);
1446                 exchange(projF, projEqF);
1447         }
1448
1449         /* we have changed the control flow */
1450         env->flags |= CF_CHANGED;
1451 }
1452
1453 /**
1454  * Translate a Conv to higher_signed
1455  */
1456 static void lower_Conv_to_Ll(ir_node *node)
1457 {
1458         ir_mode  *omode        = get_irn_mode(node);
1459         ir_node  *op           = get_Conv_op(node);
1460         ir_mode  *imode        = get_irn_mode(op);
1461         ir_graph *irg          = get_irn_irg(node);
1462         ir_node  *block        = get_nodes_block(node);
1463         dbg_info *dbg          = get_irn_dbg_info(node);
1464         ir_node  *res_low;
1465         ir_node  *res_high;
1466
1467         ir_mode  *low_unsigned = env->low_unsigned;
1468         ir_mode  *low_signed
1469                 = mode_is_signed(omode) ? env->low_signed : low_unsigned;
1470
1471         if (mode_is_int(imode) || mode_is_reference(imode)) {
1472                 if (imode == env->high_signed || imode == env->high_unsigned) {
1473                         /* a Conv from Lu to Ls or Ls to Lu */
1474                         const lower64_entry_t *op_entry = get_node_entry(op);
1475                         res_low  = op_entry->low_word;
1476                         res_high = new_rd_Conv(dbg, block, op_entry->high_word, low_signed);
1477                 } else {
1478                         /* simple case: create a high word */
1479                         if (imode != low_unsigned)
1480                                 op = new_rd_Conv(dbg, block, op, low_unsigned);
1481
1482                         res_low = op;
1483
1484                         if (mode_is_signed(imode)) {
1485                                 int      c       = get_mode_size_bits(low_signed) - 1;
1486                                 ir_node *cnst    = new_r_Const_long(irg, low_unsigned, c);
1487                                 if (get_irn_mode(op) != low_signed)
1488                                         op = new_rd_Conv(dbg, block, op, low_signed);
1489                                 res_high = new_rd_Shrs(dbg, block, op, cnst, low_signed);
1490                         } else {
1491                                 res_high = new_r_Const(irg, get_mode_null(low_signed));
1492                         }
1493                 }
1494         } else if (imode == mode_b) {
1495                 res_low  = new_rd_Conv(dbg, block, op, low_unsigned);
1496                 res_high = new_r_Const(irg, get_mode_null(low_signed));
1497         } else {
1498                 ir_node *irn, *call;
1499                 ir_type *mtp = get_conv_type(imode, omode);
1500
1501                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode);
1502                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1503                 set_irn_pinned(call, get_irn_pinned(node));
1504                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1505
1506                 if (env->params->little_endian) {
1507                         res_low  = new_r_Proj(irn, low_unsigned, 0);
1508                         res_high = new_r_Proj(irn, low_signed, 1);
1509                 } else {
1510                         res_low  = new_r_Proj(irn, low_unsigned, 1);
1511                         res_high = new_r_Proj(irn, low_signed,   0);
1512                 }
1513         }
1514         ir_set_dw_lowered(node, res_low, res_high);
1515 }
1516
1517 /**
1518  * Translate a Conv from higher_unsigned
1519  */
1520 static void lower_Conv_from_Ll(ir_node *node)
1521 {
1522         ir_node               *op    = get_Conv_op(node);
1523         ir_mode               *omode = get_irn_mode(node);
1524         ir_node               *block = get_nodes_block(node);
1525         dbg_info              *dbg   = get_irn_dbg_info(node);
1526         ir_graph              *irg   = get_irn_irg(node);
1527         const lower64_entry_t *entry = get_node_entry(op);
1528
1529         if (mode_is_int(omode) || mode_is_reference(omode)) {
1530                 op = entry->low_word;
1531
1532                 /* simple case: create a high word */
1533                 if (omode != env->low_unsigned)
1534                         op = new_rd_Conv(dbg, block, op, omode);
1535
1536                 set_Conv_op(node, op);
1537         } else if (omode == mode_b) {
1538                 /* llu ? true : false  <=> (low|high) ? true : false */
1539                 ir_mode *mode   = env->low_unsigned;
1540                 ir_node *ornode = new_rd_Or(dbg, block, entry->low_word,
1541                                             entry->high_word, mode);
1542                 set_Conv_op(node, ornode);
1543         } else {
1544                 ir_node *irn, *call, *in[2];
1545                 ir_mode *imode = get_irn_mode(op);
1546                 ir_type *mtp   = get_conv_type(imode, omode);
1547                 ir_node *res;
1548
1549                 irn   = get_intrinsic_address(mtp, get_irn_op(node), imode, omode);
1550                 if (env->params->little_endian) {
1551                         in[0] = entry->low_word;
1552                         in[1] = entry->high_word;
1553                 } else {
1554                         in[0] = entry->high_word;
1555                         in[1] = entry->low_word;
1556                 }
1557
1558                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1559                 set_irn_pinned(call, get_irn_pinned(node));
1560                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1561                 res = new_r_Proj(irn, omode, 0);
1562
1563                 exchange(node, res);
1564         }
1565 }
1566
1567 /**
1568  * lower Cmp
1569  */
1570 static void lower_Cmp(ir_node *cmp, ir_mode *m)
1571 {
1572         ir_node  *l        = get_Cmp_left(cmp);
1573         ir_mode  *cmp_mode = get_irn_mode(l);
1574         ir_node  *r, *low, *high, *t, *res;
1575         ir_relation relation;
1576         ir_node  *block;
1577         dbg_info *dbg;
1578         const lower64_entry_t *lentry;
1579         const lower64_entry_t *rentry;
1580         (void) m;
1581
1582         if (cmp_mode != env->high_signed && cmp_mode != env->high_unsigned)
1583                 return;
1584
1585         r        = get_Cmp_right(cmp);
1586         lentry   = get_node_entry(l);
1587         rentry   = get_node_entry(r);
1588         relation = get_Cmp_relation(cmp);
1589         block    = get_nodes_block(cmp);
1590         dbg      = get_irn_dbg_info(cmp);
1591
1592         /* easy case for x ==/!= 0 (see lower_Cond for details) */
1593         if (is_equality_cmp(cmp)) {
1594                 ir_graph *irg        = get_irn_irg(cmp);
1595                 ir_mode  *mode       = env->low_unsigned;
1596                 ir_node  *low_left   = new_rd_Conv(dbg, block, lentry->low_word, mode);
1597                 ir_node  *high_left  = new_rd_Conv(dbg, block, lentry->high_word, mode);
1598                 ir_node  *low_right  = new_rd_Conv(dbg, block, rentry->low_word, mode);
1599                 ir_node  *high_right = new_rd_Conv(dbg, block, rentry->high_word, mode);
1600                 ir_node  *xor_low    = new_rd_Eor(dbg, block, low_left, low_right, mode);
1601                 ir_node  *xor_high   = new_rd_Eor(dbg, block, high_left, high_right, mode);
1602                 ir_node  *ornode     = new_rd_Or(dbg, block, xor_low, xor_high, mode);
1603                 ir_node  *new_cmp    = new_rd_Cmp(dbg, block, ornode, new_r_Const(irg, get_mode_null(mode)), relation);
1604                 exchange(cmp, new_cmp);
1605                 return;
1606         }
1607
1608         if (relation == ir_relation_equal) {
1609                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1610                 low  = new_rd_Cmp(dbg, block, lentry->low_word, rentry->low_word,
1611                                   relation);
1612                 high = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1613                                   relation);
1614                 res  = new_rd_And(dbg, block, low, high, mode_b);
1615         } else if (relation == ir_relation_less_greater) {
1616                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1617                 low  = new_rd_Cmp(dbg, block, lentry->low_word, rentry->low_word,
1618                                   relation);
1619                 high = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1620                                   relation);
1621                 res = new_rd_Or(dbg, block, low, high, mode_b);
1622         } else {
1623                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1624                 ir_node *high1 = new_rd_Cmp(dbg, block, lentry->high_word,
1625                         rentry->high_word, relation & ~ir_relation_equal);
1626                 low  = new_rd_Cmp(dbg, block, lentry->low_word, rentry->low_word,
1627                                   relation);
1628                 high = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1629                                   ir_relation_equal);
1630                 t = new_rd_And(dbg, block, low, high, mode_b);
1631                 res = new_rd_Or(dbg, block, high1, t, mode_b);
1632         }
1633         exchange(cmp, res);
1634 }
1635
1636 /**
1637  * Translate a Conv.
1638  */
1639 static void lower_Conv(ir_node *node, ir_mode *mode)
1640 {
1641         mode = get_irn_mode(node);
1642
1643         if (mode == env->high_signed || mode == env->high_unsigned) {
1644                 lower_Conv_to_Ll(node);
1645         } else {
1646                 ir_mode *op_mode = get_irn_mode(get_Conv_op(node));
1647
1648                 if (op_mode == env->high_signed || op_mode == env->high_unsigned) {
1649                         lower_Conv_from_Ll(node);
1650                 }
1651         }
1652 }
1653
1654 static void fix_parameter_entities(ir_graph *irg, ir_type *orig_mtp)
1655 {
1656         size_t      orig_n_params      = get_method_n_params(orig_mtp);
1657         ir_entity **parameter_entities;
1658
1659         parameter_entities = ALLOCANZ(ir_entity*, orig_n_params);
1660
1661         ir_type *frame_type = get_irg_frame_type(irg);
1662         size_t   n          = get_compound_n_members(frame_type);
1663         size_t   i;
1664         size_t   n_param;
1665
1666         /* collect parameter entities */
1667         for (i = 0; i < n; ++i) {
1668                 ir_entity *entity = get_compound_member(frame_type, i);
1669                 size_t     p;
1670                 if (!is_parameter_entity(entity))
1671                         continue;
1672                 p = get_entity_parameter_number(entity);
1673                 if (p == IR_VA_START_PARAMETER_NUMBER)
1674                         continue;
1675                 assert(p < orig_n_params);
1676                 assert(parameter_entities[p] == NULL);
1677                 parameter_entities[p] = entity;
1678         }
1679
1680         /* adjust indices */
1681         n_param = 0;
1682         for (i = 0; i < orig_n_params; ++i, ++n_param) {
1683                 ir_entity *entity = parameter_entities[i];
1684                 ir_type   *tp;
1685
1686                 if (entity != NULL)
1687                         set_entity_parameter_number(entity, n_param);
1688
1689                 tp = get_method_param_type(orig_mtp, i);
1690                 if (is_Primitive_type(tp)) {
1691                         ir_mode *mode = get_type_mode(tp);
1692                         if (mode == env->high_signed || mode == env->high_unsigned) {
1693                                 ++n_param;
1694                                 /* note that we do not change the type of the parameter
1695                                  * entities, as calling convention fixup later still needs to
1696                                  * know which is/was a lowered doubleword.
1697                                  * So we just mark/remember it for later */
1698                                 if (entity != NULL) {
1699                                         assert(entity->attr.parameter.doubleword_low_mode == NULL);
1700                                         entity->attr.parameter.doubleword_low_mode
1701                                                 = env->low_unsigned;
1702                                 }
1703                         }
1704                 }
1705         }
1706 }
1707
1708 /**
1709  * Lower the method type.
1710  *
1711  * @param env  the lower environment
1712  * @param mtp  the method type to lower
1713  *
1714  * @return the lowered type
1715  */
1716 static ir_type *lower_mtp(ir_type *mtp)
1717 {
1718         ir_type *res;
1719         size_t   i;
1720         size_t   orig_n_params;
1721         size_t   orig_n_res;
1722         size_t   n_param;
1723         size_t   n_res;
1724         bool     must_be_lowered;
1725
1726         res = pmap_get(ir_type, lowered_type, mtp);
1727         if (res != NULL)
1728                 return res;
1729         if (type_visited(mtp))
1730                 return mtp;
1731         mark_type_visited(mtp);
1732
1733         orig_n_params   = get_method_n_params(mtp);
1734         orig_n_res      = get_method_n_ress(mtp);
1735         n_param         = orig_n_params;
1736         n_res           = orig_n_res;
1737         must_be_lowered = false;
1738
1739         /* count new number of params */
1740         for (i = orig_n_params; i > 0;) {
1741                 ir_type *tp = get_method_param_type(mtp, --i);
1742
1743                 if (is_Primitive_type(tp)) {
1744                         ir_mode *mode = get_type_mode(tp);
1745
1746                         if (mode == env->high_signed || mode == env->high_unsigned) {
1747                                 ++n_param;
1748                                 must_be_lowered = true;
1749                         }
1750                 }
1751         }
1752
1753         /* count new number of results */
1754         for (i = orig_n_res; i > 0;) {
1755                 ir_type *tp = get_method_res_type(mtp, --i);
1756
1757                 if (is_Primitive_type(tp)) {
1758                         ir_mode *mode = get_type_mode(tp);
1759
1760                         if (mode == env->high_signed || mode == env->high_unsigned) {
1761                                 ++n_res;
1762                                 must_be_lowered = true;
1763                         }
1764                 }
1765         }
1766         if (!must_be_lowered) {
1767                 set_type_link(mtp, NULL);
1768                 return mtp;
1769         }
1770
1771         res = new_d_type_method(n_param, n_res, get_type_dbg_info(mtp));
1772
1773         /* set param types and result types */
1774         for (i = n_param = 0; i < orig_n_params; ++i) {
1775                 ir_type *tp = get_method_param_type(mtp, i);
1776
1777                 if (is_Primitive_type(tp)) {
1778                         ir_mode *mode = get_type_mode(tp);
1779
1780                         if (mode == env->high_signed) {
1781                                 if (env->params->little_endian) {
1782                                         set_method_param_type(res, n_param++, tp_u);
1783                                         set_method_param_type(res, n_param++, tp_s);
1784                                 } else {
1785                                         set_method_param_type(res, n_param++, tp_s);
1786                                         set_method_param_type(res, n_param++, tp_u);
1787                                 }
1788                         } else if (mode == env->high_unsigned) {
1789                                 set_method_param_type(res, n_param++, tp_u);
1790                                 set_method_param_type(res, n_param++, tp_u);
1791                         } else {
1792                                 set_method_param_type(res, n_param, tp);
1793                                 ++n_param;
1794                         }
1795                 } else {
1796                         set_method_param_type(res, n_param, tp);
1797                         ++n_param;
1798                 }
1799         }
1800         for (i = n_res = 0; i < orig_n_res; ++i) {
1801                 ir_type *tp = get_method_res_type(mtp, i);
1802
1803                 if (is_Primitive_type(tp)) {
1804                         ir_mode *mode = get_type_mode(tp);
1805
1806                         if (mode == env->high_signed) {
1807                                 if (env->params->little_endian) {
1808                                         set_method_res_type(res, n_res++, tp_u);
1809                                         set_method_res_type(res, n_res++, tp_s);
1810                                 } else {
1811                                         set_method_res_type(res, n_res++, tp_s);
1812                                         set_method_res_type(res, n_res++, tp_u);
1813                                 }
1814                         } else if (mode == env->high_unsigned) {
1815                                 set_method_res_type(res, n_res++, tp_u);
1816                                 set_method_res_type(res, n_res++, tp_u);
1817                         } else {
1818                                 set_method_res_type(res, n_res++, tp);
1819                         }
1820                 } else {
1821                         set_method_res_type(res, n_res++, tp);
1822                 }
1823         }
1824
1825         set_method_variadicity(res, get_method_variadicity(mtp));
1826         set_method_calling_convention(res, get_method_calling_convention(mtp));
1827         set_method_additional_properties(res, get_method_additional_properties(mtp));
1828
1829         set_higher_type(res, mtp);
1830         set_type_link(res, mtp);
1831
1832         mark_type_visited(res);
1833         pmap_insert(lowered_type, mtp, res);
1834         return res;
1835 }
1836
1837 /**
1838  * Translate a Return.
1839  */
1840 static void lower_Return(ir_node *node, ir_mode *mode)
1841 {
1842         ir_graph  *irg = get_irn_irg(node);
1843         ir_entity *ent = get_irg_entity(irg);
1844         ir_type   *mtp = get_entity_type(ent);
1845         ir_node  **in;
1846         size_t     i, j, n;
1847         int        need_conv = 0;
1848         (void) mode;
1849
1850         /* check if this return must be lowered */
1851         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1852                 ir_node *pred  = get_Return_res(node, i);
1853                 ir_mode *rmode = get_irn_op_mode(pred);
1854
1855                 if (rmode == env->high_signed || rmode == env->high_unsigned)
1856                         need_conv = 1;
1857         }
1858         if (! need_conv)
1859                 return;
1860
1861         ent = get_irg_entity(irg);
1862         mtp = get_entity_type(ent);
1863
1864         /* create a new in array */
1865         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1866         j = 0;
1867         in[j++] = get_Return_mem(node);
1868
1869         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1870                 ir_node *pred      = get_Return_res(node, i);
1871                 ir_mode *pred_mode = get_irn_mode(pred);
1872
1873                 if (pred_mode == env->high_signed || pred_mode == env->high_unsigned) {
1874                         const lower64_entry_t *entry = get_node_entry(pred);
1875                         if (env->params->little_endian) {
1876                                 in[j++] = entry->low_word;
1877                                 in[j++] = entry->high_word;
1878                         } else {
1879                                 in[j++] = entry->high_word;
1880                                 in[j++] = entry->low_word;
1881                         }
1882                 } else {
1883                         in[j++] = pred;
1884                 }
1885         }
1886         assert(j == get_method_n_ress(mtp)+1);
1887
1888         set_irn_in(node, j, in);
1889 }
1890
1891 /**
1892  * Translate the parameters.
1893  */
1894 static void lower_Start(ir_node *node, ir_mode *high_mode)
1895 {
1896         ir_graph  *irg      = get_irn_irg(node);
1897         ir_entity *ent      = get_irg_entity(irg);
1898         ir_type   *mtp      = get_entity_type(ent);
1899         ir_type   *orig_mtp = (ir_type*)get_type_link(mtp);
1900         ir_node   *args;
1901         long      *new_projs;
1902         size_t    i, j, n_params;
1903         (void) high_mode;
1904
1905         /* if type link is NULL then the type was not lowered, hence no changes
1906          * at Start necessary */
1907         if (orig_mtp == NULL)
1908                 return;
1909
1910         n_params = get_method_n_params(orig_mtp);
1911
1912         NEW_ARR_A(long, new_projs, n_params);
1913
1914         /* Calculate mapping of proj numbers in new_projs */
1915         for (i = j = 0; i < n_params; ++i, ++j) {
1916                 ir_type *ptp = get_method_param_type(orig_mtp, i);
1917
1918                 new_projs[i] = j;
1919                 if (is_Primitive_type(ptp)) {
1920                         ir_mode *amode = get_type_mode(ptp);
1921                         if (amode == env->high_signed || amode == env->high_unsigned)
1922                                 ++j;
1923                 }
1924         }
1925
1926         /* find args Proj */
1927         args = NULL;
1928         foreach_out_edge(node, edge) {
1929                 ir_node *proj = get_edge_src_irn(edge);
1930                 if (!is_Proj(proj))
1931                         continue;
1932                 if (get_Proj_proj(proj) == pn_Start_T_args) {
1933                         args = proj;
1934                         break;
1935                 }
1936         }
1937         if (args == NULL)
1938                 return;
1939
1940         /* fix all Proj's and create new ones */
1941         foreach_out_edge_safe(args, edge) {
1942                 ir_node *proj   = get_edge_src_irn(edge);
1943                 ir_mode *mode   = get_irn_mode(proj);
1944                 ir_mode *mode_l = env->low_unsigned;
1945                 ir_node *pred;
1946                 long     proj_nr;
1947                 ir_mode *mode_h;
1948                 ir_node *res_low;
1949                 ir_node *res_high;
1950                 int      old_cse;
1951                 dbg_info *dbg;
1952
1953                 if (!is_Proj(proj))
1954                         continue;
1955                 pred    = get_Proj_pred(proj);
1956                 proj_nr = get_Proj_proj(proj);
1957
1958                 if (mode == env->high_signed) {
1959                         mode_h = env->low_signed;
1960                 } else if (mode == env->high_unsigned) {
1961                         mode_h = env->low_unsigned;
1962                 } else {
1963                         long new_pn = new_projs[proj_nr];
1964                         set_Proj_proj(proj, new_pn);
1965                         continue;
1966                 }
1967
1968                 /* Switch off CSE or we might get an already existing Proj. */
1969                 old_cse = get_opt_cse();
1970                 set_opt_cse(0);
1971                 dbg = get_irn_dbg_info(proj);
1972                 if (env->params->little_endian) {
1973                         res_low  = new_rd_Proj(dbg, pred, mode_l, new_projs[proj_nr]);
1974                         res_high = new_rd_Proj(dbg, pred, mode_h, new_projs[proj_nr] + 1);
1975                 } else {
1976                         res_high = new_rd_Proj(dbg, pred, mode_h, new_projs[proj_nr]);
1977                         res_low  = new_rd_Proj(dbg, pred, mode_l, new_projs[proj_nr] + 1);
1978                 }
1979                 set_opt_cse(old_cse);
1980                 ir_set_dw_lowered(proj, res_low, res_high);
1981         }
1982 }
1983
1984 /**
1985  * Translate a Call.
1986  */
1987 static void lower_Call(ir_node *node, ir_mode *mode)
1988 {
1989         ir_type  *tp = get_Call_type(node);
1990         ir_node  **in;
1991         size_t   n_params, n_res;
1992         bool     need_lower = false;
1993         size_t   i, j;
1994         size_t   p;
1995         long     *res_numbers = NULL;
1996         ir_node  *resproj;
1997         (void) mode;
1998
1999         n_params = get_method_n_params(tp);
2000         for (p = 0; p < n_params; ++p) {
2001                 ir_type *ptp = get_method_param_type(tp, p);
2002
2003                 if (is_Primitive_type(ptp)) {
2004                         ir_mode *pmode = get_type_mode(ptp);
2005                         if (pmode == env->high_signed || pmode == env->high_unsigned) {
2006                                 need_lower = true;
2007                                 break;
2008                         }
2009                 }
2010         }
2011         n_res = get_method_n_ress(tp);
2012         if (n_res > 0) {
2013                 NEW_ARR_A(long, res_numbers, n_res);
2014
2015                 for (i = j = 0; i < n_res; ++i, ++j) {
2016                         ir_type *ptp = get_method_res_type(tp, i);
2017
2018                         res_numbers[i] = j;
2019                         if (is_Primitive_type(ptp)) {
2020                                 ir_mode *rmode = get_type_mode(ptp);
2021                                 if (rmode == env->high_signed || rmode == env->high_unsigned) {
2022                                         need_lower = true;
2023                                         ++j;
2024                                 }
2025                         }
2026                 }
2027         }
2028
2029         if (! need_lower)
2030                 return;
2031
2032         /* let's lower it */
2033         tp = lower_mtp(tp);
2034         set_Call_type(node, tp);
2035
2036         NEW_ARR_A(ir_node *, in, get_method_n_params(tp) + 2);
2037
2038         in[0] = get_Call_mem(node);
2039         in[1] = get_Call_ptr(node);
2040
2041         for (j = 2, i = 0; i < n_params; ++i) {
2042                 ir_node *pred      = get_Call_param(node, i);
2043                 ir_mode *pred_mode = get_irn_mode(pred);
2044
2045                 if (pred_mode == env->high_signed || pred_mode == env->high_unsigned) {
2046                         const lower64_entry_t *pred_entry = get_node_entry(pred);
2047                         if (env->params->little_endian) {
2048                                 in[j++] = pred_entry->low_word;
2049                                 in[j++] = pred_entry->high_word;
2050                         } else {
2051                                 in[j++] = pred_entry->high_word;
2052                                 in[j++] = pred_entry->low_word;
2053                         }
2054                 } else {
2055                         in[j++] = pred;
2056                 }
2057         }
2058
2059         set_irn_in(node, j, in);
2060
2061         /* find results T */
2062         resproj = NULL;
2063         foreach_out_edge(node, edge) {
2064                 ir_node *proj = get_edge_src_irn(edge);
2065                 if (!is_Proj(proj))
2066                         continue;
2067                 if (get_Proj_proj(proj) == pn_Call_T_result) {
2068                         resproj = proj;
2069                         break;
2070                 }
2071         }
2072         if (resproj == NULL)
2073                 return;
2074
2075         /* fix the results */
2076         foreach_out_edge_safe(resproj, edge) {
2077                 ir_node  *proj      = get_edge_src_irn(edge);
2078                 ir_mode  *proj_mode = get_irn_mode(proj);
2079                 ir_mode  *mode_l    = env->low_unsigned;
2080                 ir_node  *pred;
2081                 long      proj_nr;
2082                 ir_mode  *mode_h;
2083                 ir_node  *res_low;
2084                 ir_node  *res_high;
2085                 dbg_info *dbg;
2086
2087                 if (!is_Proj(proj))
2088                         continue;
2089                 pred    = get_Proj_pred(proj);
2090                 proj_nr = get_Proj_proj(proj);
2091
2092                 if (proj_mode == env->high_signed) {
2093                         mode_h = env->low_signed;
2094                 } else if (proj_mode == env->high_unsigned) {
2095                         mode_h = env->low_unsigned;
2096                 } else {
2097                         long new_nr = res_numbers[proj_nr];
2098                         set_Proj_proj(proj, new_nr);
2099                         continue;
2100                 }
2101
2102                 dbg = get_irn_dbg_info(proj);
2103                 if (env->params->little_endian) {
2104                         res_low  = new_rd_Proj(dbg, pred, mode_l, res_numbers[proj_nr]);
2105                         res_high = new_rd_Proj(dbg, pred, mode_h, res_numbers[proj_nr] + 1);
2106                 } else {
2107                         res_high = new_rd_Proj(dbg, pred, mode_h, res_numbers[proj_nr]);
2108                         res_low  = new_rd_Proj(dbg, pred, mode_l, res_numbers[proj_nr] + 1);
2109                 }
2110                 ir_set_dw_lowered(proj, res_low, res_high);
2111         }
2112 }
2113
2114 /**
2115  * Translate an Unknown into two.
2116  */
2117 static void lower_Unknown(ir_node *node, ir_mode *mode)
2118 {
2119         ir_mode  *low_mode = env->low_unsigned;
2120         ir_graph *irg      = get_irn_irg(node);
2121         ir_node  *res_low  = new_r_Unknown(irg, low_mode);
2122         ir_node  *res_high = new_r_Unknown(irg, mode);
2123         ir_set_dw_lowered(node, res_low, res_high);
2124 }
2125
2126 /**
2127  * Translate a Bad into two.
2128  */
2129 static void lower_Bad(ir_node *node, ir_mode *mode)
2130 {
2131         ir_mode  *low_mode = env->low_unsigned;
2132         ir_graph *irg      = get_irn_irg(node);
2133         ir_node  *res_low  = new_r_Bad(irg, low_mode);
2134         ir_node  *res_high = new_r_Bad(irg, mode);
2135         ir_set_dw_lowered(node, res_low, res_high);
2136 }
2137
2138 /**
2139  * Translate a Phi.
2140  *
2141  * First step: just create two templates
2142  */
2143 static void lower_Phi(ir_node *phi)
2144 {
2145         ir_mode  *mode = get_irn_mode(phi);
2146         int       i;
2147         int       arity;
2148         ir_node **in_l;
2149         ir_node **in_h;
2150         ir_node  *unk_l;
2151         ir_node  *unk_h;
2152         ir_node  *phi_l;
2153         ir_node  *phi_h;
2154         dbg_info *dbg;
2155         ir_node  *block;
2156         ir_graph *irg;
2157         ir_mode  *mode_l;
2158         ir_mode  *mode_h;
2159
2160         /* enqueue predecessors */
2161         arity = get_Phi_n_preds(phi);
2162         for (i = 0; i < arity; ++i) {
2163                 ir_node *pred = get_Phi_pred(phi, i);
2164                 pdeq_putr(env->waitq, pred);
2165         }
2166
2167         if (mode != env->high_signed && mode != env->high_unsigned)
2168                 return;
2169
2170         /* first create a new in array */
2171         NEW_ARR_A(ir_node *, in_l, arity);
2172         NEW_ARR_A(ir_node *, in_h, arity);
2173         irg    = get_irn_irg(phi);
2174         mode_l = env->low_unsigned;
2175         mode_h = mode == env->high_signed ? env->low_signed : env->low_unsigned;
2176         unk_l  = new_r_Dummy(irg, mode_l);
2177         unk_h  = new_r_Dummy(irg, mode_h);
2178         for (i = 0; i < arity; ++i) {
2179                 in_l[i] = unk_l;
2180                 in_h[i] = unk_h;
2181         }
2182
2183         dbg   = get_irn_dbg_info(phi);
2184         block = get_nodes_block(phi);
2185         phi_l = new_rd_Phi(dbg, block, arity, in_l, mode_l);
2186         phi_h = new_rd_Phi(dbg, block, arity, in_h, mode_h);
2187
2188         ir_set_dw_lowered(phi, phi_l, phi_h);
2189
2190         /* remember that we need to fixup the predecessors later */
2191         ARR_APP1(ir_node*, env->lowered_phis, phi);
2192 }
2193
2194 static void fixup_phi(ir_node *phi)
2195 {
2196         const lower64_entry_t *entry = get_node_entry(phi);
2197         ir_node               *phi_l = entry->low_word;
2198         ir_node               *phi_h = entry->high_word;
2199         int                    arity = get_Phi_n_preds(phi);
2200         int                    i;
2201
2202         /* exchange phi predecessors which are lowered by now */
2203         for (i = 0; i < arity; ++i) {
2204                 ir_node               *pred       = get_Phi_pred(phi, i);
2205                 const lower64_entry_t *pred_entry = get_node_entry(pred);
2206
2207                 set_Phi_pred(phi_l, i, pred_entry->low_word);
2208                 set_Phi_pred(phi_h, i, pred_entry->high_word);
2209         }
2210 }
2211
2212 /**
2213  * Translate a Mux.
2214  */
2215 static void lower_Mux(ir_node *mux, ir_mode *mode)
2216 {
2217         ir_node               *truen       = get_Mux_true(mux);
2218         ir_node               *falsen      = get_Mux_false(mux);
2219         ir_node               *sel         = get_Mux_sel(mux);
2220         const lower64_entry_t *true_entry  = get_node_entry(truen);
2221         const lower64_entry_t *false_entry = get_node_entry(falsen);
2222         ir_node               *true_l      = true_entry->low_word;
2223         ir_node               *true_h      = true_entry->high_word;
2224         ir_node               *false_l     = false_entry->low_word;
2225         ir_node               *false_h     = false_entry->high_word;
2226         dbg_info              *dbgi        = get_irn_dbg_info(mux);
2227         ir_node               *block       = get_nodes_block(mux);
2228         ir_node               *res_low
2229                 = new_rd_Mux(dbgi, block, sel, false_l, true_l, env->low_unsigned);
2230         ir_node               *res_high
2231                 = new_rd_Mux(dbgi, block, sel, false_h, true_h, mode);
2232         ir_set_dw_lowered(mux, res_low, res_high);
2233 }
2234
2235 /**
2236  * Translate an ASM node.
2237  */
2238 static void lower_ASM(ir_node *asmn, ir_mode *mode)
2239 {
2240         ir_mode           *high_signed        = env->high_signed;
2241         ir_mode           *high_unsigned      = env->high_unsigned;
2242         int                n_outs             = get_ASM_n_output_constraints(asmn);
2243         ir_asm_constraint *output_constraints = get_ASM_output_constraints(asmn);
2244         ir_asm_constraint *input_constraints  = get_ASM_input_constraints(asmn);
2245         unsigned           n_64bit_outs       = 0;
2246
2247         (void)mode;
2248
2249         for (int i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2250                 ir_node *op      = get_irn_n(asmn, i);
2251                 ir_mode *op_mode = get_irn_mode(op);
2252                 if (op_mode == high_signed || op_mode == high_unsigned) {
2253                         panic("lowering ASM 64bit input unimplemented");
2254                 }
2255         }
2256
2257         for (int o = 0; o < n_outs; ++o) {
2258                 const ir_asm_constraint *constraint = &output_constraints[o];
2259                 if (constraint->mode == high_signed || constraint->mode == high_unsigned) {
2260                         const char *constr = get_id_str(constraint->constraint);
2261                         ++n_64bit_outs;
2262                         /* TODO: How to do this architecture neutral? This is very
2263                          * i386 specific... */
2264                         if (constr[0] != '=' || constr[1] != 'A') {
2265                                 panic("lowering ASM 64bit output only supports '=A' currently");
2266                         }
2267                 }
2268         }
2269
2270         if (n_64bit_outs == 0)
2271                 return;
2272
2273         dbg_info          *dbgi       = get_irn_dbg_info(asmn);
2274         ir_node           *block      = get_nodes_block(asmn);
2275         ir_node           *mem        = get_ASM_mem(asmn);
2276         int                new_n_outs = 0;
2277         int                n_clobber  = get_ASM_n_clobbers(asmn);
2278         long              *proj_map   = ALLOCAN(long, n_outs);
2279         ident            **clobbers   = get_ASM_clobbers(asmn);
2280         ident             *asm_text   = get_ASM_text(asmn);
2281         ir_asm_constraint *new_outputs
2282                 = ALLOCAN(ir_asm_constraint, n_outs+n_64bit_outs);
2283         ir_node           *new_asm;
2284
2285         for (int o = 0; o < n_outs; ++o) {
2286                 const ir_asm_constraint *constraint = &output_constraints[o];
2287                 if (constraint->mode == high_signed || constraint->mode == high_unsigned) {
2288                         new_outputs[new_n_outs].pos        = constraint->pos;
2289                         new_outputs[new_n_outs].constraint = new_id_from_str("=a");
2290                         new_outputs[new_n_outs].mode       = env->low_unsigned;
2291                         proj_map[o] = new_n_outs;
2292                         ++new_n_outs;
2293                         new_outputs[new_n_outs].pos        = constraint->pos;
2294                         new_outputs[new_n_outs].constraint = new_id_from_str("=d");
2295                         if (constraint->mode == high_signed)
2296                                 new_outputs[new_n_outs].mode = env->low_signed;
2297                         else
2298                                 new_outputs[new_n_outs].mode = env->low_unsigned;
2299                         ++new_n_outs;
2300                 } else {
2301                         new_outputs[new_n_outs] = *constraint;
2302                         proj_map[o] = new_n_outs;
2303                         ++new_n_outs;
2304                 }
2305         }
2306         assert(new_n_outs == n_outs+(int)n_64bit_outs);
2307
2308         int       n_inputs = get_ASM_n_inputs(asmn);
2309         ir_node **new_ins  = ALLOCAN(ir_node*, n_inputs);
2310         for (int i = 0; i < n_inputs; ++i)
2311                 new_ins[i] = get_ASM_input(asmn, i);
2312
2313         new_asm = new_rd_ASM(dbgi, block, mem, n_inputs, new_ins, input_constraints,
2314                                                  new_n_outs, new_outputs, n_clobber, clobbers,
2315                                                  asm_text);
2316
2317         foreach_out_edge_safe(asmn, edge) {
2318                 ir_node *proj      = get_edge_src_irn(edge);
2319                 ir_mode *proj_mode = get_irn_mode(proj);
2320                 long     pn;
2321
2322                 if (!is_Proj(proj))
2323                         continue;
2324                 pn = get_Proj_proj(proj);
2325
2326                 if (pn < n_outs)
2327                         pn = proj_map[pn];
2328                 else
2329                         pn = new_n_outs + pn - n_outs;
2330
2331                 if (proj_mode == high_signed || proj_mode == high_unsigned) {
2332                         ir_mode *high_mode
2333                                 = proj_mode == high_signed ? env->low_signed : env->low_unsigned;
2334                         ir_node *np_low  = new_r_Proj(new_asm, env->low_unsigned, pn);
2335                         ir_node *np_high = new_r_Proj(new_asm, high_mode, pn+1);
2336                         ir_set_dw_lowered(proj, np_low, np_high);
2337                 } else {
2338                         ir_node *np = new_r_Proj(new_asm, proj_mode, pn);
2339                         exchange(proj, np);
2340                 }
2341         }
2342 }
2343
2344 /**
2345  * Lower the builtin type to its higher part.
2346  *
2347  * @param mtp  the builtin type to lower
2348  *
2349  * @return the lowered type
2350  */
2351 static ir_type *lower_Builtin_type_high(ir_type *mtp)
2352 {
2353         ir_type *res;
2354         size_t   i;
2355         size_t   n_params;
2356         size_t   n_results;
2357         bool     must_be_lowered;
2358
2359         res = pmap_get(ir_type, lowered_builtin_type_high, mtp);
2360         if (res != NULL)
2361                 return res;
2362
2363         n_params        = get_method_n_params(mtp);
2364         n_results       = get_method_n_ress(mtp);
2365         must_be_lowered = false;
2366
2367         /* check for double word parameter */
2368         for (i = n_params; i > 0;) {
2369                 ir_type *tp = get_method_param_type(mtp, --i);
2370
2371                 if (is_Primitive_type(tp)) {
2372                         ir_mode *mode = get_type_mode(tp);
2373
2374                         if (mode == env->high_signed || mode == env->high_unsigned) {
2375                                 must_be_lowered = true;
2376                                 break;
2377                         }
2378                 }
2379         }
2380
2381         if (!must_be_lowered) {
2382                 set_type_link(mtp, NULL);
2383                 return mtp;
2384         }
2385
2386         res = new_d_type_method(n_params, n_results, get_type_dbg_info(mtp));
2387
2388         /* set param types and result types */
2389         for (i = 0; i < n_params; ++i) {
2390                 ir_type *tp = get_method_param_type(mtp, i);
2391
2392                 if (is_Primitive_type(tp)) {
2393                         ir_mode *mode = get_type_mode(tp);
2394
2395                         if (mode == env->high_signed) {
2396                                 if (env->params->little_endian) {
2397                                         set_method_param_type(res, i, tp_u);
2398                                 } else {
2399                                         set_method_param_type(res, i, tp_s);
2400                                 }
2401                         } else if (mode == env->high_unsigned) {
2402                                 set_method_param_type(res, i, tp_u);
2403                         } else {
2404                                 set_method_param_type(res, i, tp);
2405                         }
2406                 } else {
2407                         set_method_param_type(res, i, tp);
2408                 }
2409         }
2410         for (i = n_results = 0; i < n_results; ++i) {
2411                 ir_type *tp = get_method_res_type(mtp, i);
2412
2413                 if (is_Primitive_type(tp)) {
2414                         ir_mode *mode = get_type_mode(tp);
2415
2416                         if (mode == env->high_signed) {
2417                                 if (env->params->little_endian) {
2418                                         set_method_res_type(res, i, tp_u);
2419                                 } else {
2420                                         set_method_res_type(res, i, tp_s);
2421                                 }
2422                         } else if (mode == env->high_unsigned) {
2423                                 set_method_res_type(res, i, tp_u);
2424                         } else {
2425                                 set_method_res_type(res, i, tp);
2426                         }
2427                 } else {
2428                         set_method_res_type(res, i, tp);
2429                 }
2430         }
2431
2432         set_method_variadicity(res, get_method_variadicity(mtp));
2433         set_method_calling_convention(res, get_method_calling_convention(mtp));
2434         set_method_additional_properties(res, get_method_additional_properties(mtp));
2435
2436         pmap_insert(lowered_builtin_type_high, mtp, res);
2437         return res;
2438 }
2439
2440 /**
2441  * Lower the builtin type to its lower part.
2442  *
2443  * @param mtp  the builtin type to lower
2444  *
2445  * @return the lowered type
2446  */
2447 static ir_type *lower_Builtin_type_low(ir_type *mtp)
2448 {
2449         ir_type *res;
2450         size_t   i;
2451         size_t   n_params;
2452         size_t   n_results;
2453         bool     must_be_lowered;
2454
2455         res = pmap_get(ir_type, lowered_builtin_type_low, mtp);
2456         if (res != NULL)
2457                 return res;
2458
2459         n_params        = get_method_n_params(mtp);
2460         n_results       = get_method_n_ress(mtp);
2461         must_be_lowered = false;
2462
2463         /* check for double word parameter */
2464         for (i = n_params; i > 0;) {
2465                 ir_type *tp = get_method_param_type(mtp, --i);
2466
2467                 if (is_Primitive_type(tp)) {
2468                         ir_mode *mode = get_type_mode(tp);
2469
2470                         if (mode == env->high_signed || mode == env->high_unsigned) {
2471                                 must_be_lowered = true;
2472                                 break;
2473                         }
2474                 }
2475         }
2476
2477         if (!must_be_lowered) {
2478                 set_type_link(mtp, NULL);
2479                 return mtp;
2480         }
2481
2482         res = new_d_type_method(n_params, n_results, get_type_dbg_info(mtp));
2483
2484         /* set param types and result types */
2485         for (i = 0; i < n_params; ++i) {
2486                 ir_type *tp = get_method_param_type(mtp, i);
2487
2488                 if (is_Primitive_type(tp)) {
2489                         ir_mode *mode = get_type_mode(tp);
2490
2491                         if (mode == env->high_signed) {
2492                                 if (env->params->little_endian) {
2493                                         set_method_param_type(res, i, tp_s);
2494                                 } else {
2495                                         set_method_param_type(res, i, tp_u);
2496                                 }
2497                         } else if (mode == env->high_unsigned) {
2498                                 set_method_param_type(res, i, tp_u);
2499                         } else {
2500                                 set_method_param_type(res, i, tp);
2501                         }
2502                 } else {
2503                         set_method_param_type(res, i, tp);
2504                 }
2505         }
2506         for (i = 0; i < n_results; ++i) {
2507                 ir_type *tp = get_method_res_type(mtp, i);
2508
2509                 if (is_Primitive_type(tp)) {
2510                         ir_mode *mode = get_type_mode(tp);
2511
2512                         if (mode == env->high_signed) {
2513                                 if (env->params->little_endian) {
2514                                         set_method_res_type(res, i, tp_s);
2515                                 } else {
2516                                         set_method_res_type(res, i, tp_u);
2517                                 }
2518                         } else if (mode == env->high_unsigned) {
2519                                 set_method_res_type(res, i, tp_u);
2520                         } else {
2521                                 set_method_res_type(res, i, tp);
2522                         }
2523                 } else {
2524                         set_method_res_type(res, i, tp);
2525                 }
2526         }
2527
2528         set_method_variadicity(res, get_method_variadicity(mtp));
2529         set_method_calling_convention(res, get_method_calling_convention(mtp));
2530         set_method_additional_properties(res, get_method_additional_properties(mtp));
2531
2532         pmap_insert(lowered_builtin_type_low, mtp, res);
2533         return res;
2534 }
2535
2536 /**
2537  * lowers a builtin which reduces a 64bit value to a simple summary value
2538  * (popcount, ffs, ...)
2539  */
2540 static void lower_reduce_builtin(ir_node *builtin, ir_mode *mode)
2541 {
2542         ir_builtin_kind  kind         = get_Builtin_kind(builtin);
2543         ir_node         *operand      = get_Builtin_param(builtin, 0);
2544         ir_mode         *operand_mode = get_irn_mode(operand);
2545         if (operand_mode != env->high_signed && operand_mode != env->high_unsigned)
2546                 return;
2547
2548         {
2549         arch_allow_ifconv_func  allow_ifconv      = be_get_backend_param()->allow_ifconv;
2550         int                     arity             = get_irn_arity(builtin);
2551         dbg_info               *dbgi              = get_irn_dbg_info(builtin);
2552         ir_graph               *irg               = get_irn_irg(builtin);
2553         ir_type                *type              = get_Builtin_type(builtin);
2554         ir_type                *lowered_type_high = lower_Builtin_type_high(type);
2555         ir_type                *lowered_type_low  = lower_Builtin_type_low(type);
2556         ir_type                *result_type       = get_method_res_type(lowered_type_low, 0);
2557         ir_mode                *result_mode       = get_type_mode(result_type);
2558         ir_node                *block             = get_nodes_block(builtin);
2559         ir_node                *mem               = get_Builtin_mem(builtin);
2560         const lower64_entry_t  *entry             = get_node_entry(operand);
2561         ir_mode                *high_mode         = get_irn_mode(entry->high_word);
2562         ir_node                *in_high[1]        = {entry->high_word};
2563         ir_node                *in_low[1]         = {entry->low_word};
2564         ir_node                *res;
2565
2566         assert(is_NoMem(mem));
2567         assert(arity == 2);
2568
2569         switch (kind) {
2570         case ir_bk_ffs: {
2571                 ir_node               *number_of_bits = new_r_Const_long(irg, result_mode, get_mode_size_bits(env->low_unsigned));
2572                 ir_node               *zero_high      = new_rd_Const(dbgi, irg, get_mode_null(high_mode));
2573                 ir_node               *zero_unsigned  = new_rd_Const(dbgi, irg, get_mode_null(env->low_unsigned));
2574                 ir_node               *zero_result    = new_rd_Const(dbgi, irg, get_mode_null(result_mode));
2575                 ir_node               *cmp_low        = new_rd_Cmp(dbgi, block, entry->low_word, zero_unsigned, ir_relation_equal);
2576                 ir_node               *cmp_high       = new_rd_Cmp(dbgi, block, entry->high_word, zero_high, ir_relation_equal);
2577                 ir_node               *ffs_high       = new_rd_Builtin(dbgi, block, mem, 1, in_high, kind, lowered_type_high);
2578                 ir_node               *high_proj      = new_r_Proj(ffs_high, result_mode, pn_Builtin_max+1);
2579                 ir_node               *high           = new_rd_Add(dbgi, block, high_proj, number_of_bits, result_mode);
2580                 ir_node               *ffs_low        = new_rd_Builtin(dbgi, block, mem, 1, in_low, kind, lowered_type_low);
2581                 ir_node               *low            = new_r_Proj(ffs_low, result_mode, pn_Builtin_max+1);
2582                 ir_node               *mux_high       = new_rd_Mux(dbgi, block, cmp_high, high, zero_result, result_mode);
2583
2584                 if (! allow_ifconv(cmp_high, high, zero_result))
2585                         ir_nodeset_insert(&created_mux_nodes, mux_high);
2586
2587                 res = new_rd_Mux(dbgi, block, cmp_low, low, mux_high, result_mode);
2588
2589                 if (! allow_ifconv(cmp_low, low, mux_high))
2590                         ir_nodeset_insert(&created_mux_nodes, res);
2591                 break;
2592         }
2593         case ir_bk_clz: {
2594                 ir_node               *zero           = new_rd_Const(dbgi, irg, get_mode_null(high_mode));
2595                 ir_node               *cmp_high       = new_rd_Cmp(dbgi, block, entry->high_word, zero, ir_relation_equal);
2596                 ir_node               *clz_high       = new_rd_Builtin(dbgi, block, mem, 1, in_high, kind, lowered_type_high);
2597                 ir_node               *high           = new_r_Proj(clz_high, result_mode, pn_Builtin_max+1);
2598                 ir_node               *clz_low        = new_rd_Builtin(dbgi, block, mem, 1, in_low, kind, lowered_type_low);
2599                 ir_node               *low_proj       = new_r_Proj(clz_low, result_mode, pn_Builtin_max+1);
2600                 ir_node               *number_of_bits = new_r_Const_long(irg, result_mode, get_mode_size_bits(mode));
2601                 ir_node               *low            = new_rd_Add(dbgi, block, low_proj, number_of_bits, result_mode);
2602
2603                 res = new_rd_Mux(dbgi, block, cmp_high, high, low, result_mode);
2604
2605                 if (! allow_ifconv(cmp_high, high, low))
2606                         ir_nodeset_insert(&created_mux_nodes, res);
2607                 break;
2608         }
2609         case ir_bk_ctz: {
2610                 ir_node               *zero_unsigned  = new_rd_Const(dbgi, irg, get_mode_null(env->low_unsigned));
2611                 ir_node               *cmp_low        = new_rd_Cmp(dbgi, block, entry->low_word, zero_unsigned, ir_relation_equal);
2612                 ir_node               *ffs_high       = new_rd_Builtin(dbgi, block, mem, 1, in_high, kind, lowered_type_high);
2613                 ir_node               *high_proj      = new_r_Proj(ffs_high, result_mode, pn_Builtin_max+1);
2614                 ir_node               *number_of_bits = new_r_Const_long(irg, result_mode, get_mode_size_bits(env->low_unsigned));
2615                 ir_node               *high           = new_rd_Add(dbgi, block, high_proj, number_of_bits, result_mode);
2616                 ir_node               *ffs_low        = new_rd_Builtin(dbgi, block, mem, 1, in_low, kind, lowered_type_low);
2617                 ir_node               *low            = new_r_Proj(ffs_low, result_mode, pn_Builtin_max+1);
2618
2619                 res = new_rd_Mux(dbgi, block, cmp_low, low, high, result_mode);
2620
2621                 if (! allow_ifconv(cmp_low, low, high))
2622                         ir_nodeset_insert(&created_mux_nodes, res);
2623                 break;
2624         }
2625         case ir_bk_popcount: {
2626                 ir_node               *popcount_high = new_rd_Builtin(dbgi, block, mem, 1, in_high, kind, lowered_type_high);
2627                 ir_node               *popcount_low  = new_rd_Builtin(dbgi, block, mem, 1, in_low, kind, lowered_type_low);
2628                 ir_node               *high          = new_r_Proj(popcount_high, result_mode, pn_Builtin_max+1);
2629                 ir_node               *low           = new_r_Proj(popcount_low, result_mode, pn_Builtin_max+1);
2630
2631                 res = new_rd_Add(dbgi, block, high, low, result_mode);
2632                 break;
2633         }
2634         case ir_bk_parity: {
2635                 ir_node  *parity_high;
2636                 ir_node  *parity_low;
2637                 ir_node  *high;
2638                 ir_node  *low;
2639
2640                 assert(arity == 2);
2641
2642                 parity_high = new_rd_Builtin(dbgi, block, mem, 1, in_high, kind, lowered_type_high);
2643                 high        = new_r_Proj(parity_high, result_mode, pn_Builtin_max+1);
2644                 parity_low  = new_rd_Builtin(dbgi, block, mem, 1, in_low, kind, lowered_type_low);
2645                 low         = new_r_Proj(parity_low, result_mode, pn_Builtin_max+1);
2646                 res         = new_rd_Eor(dbgi, block, high, low, result_mode);
2647                 break;
2648         }
2649         default:
2650                 panic("unexpected builtin");
2651         }
2652
2653         turn_into_tuple(builtin, 2);
2654         set_irn_n(builtin, pn_Builtin_M, mem);
2655         set_irn_n(builtin, pn_Builtin_max+1, res);
2656         }
2657 }
2658
2659 /**
2660  * lowers builtins performing arithmetic (bswap)
2661  */
2662 static void lower_arithmetic_builtin(ir_node *builtin, ir_mode *mode)
2663 {
2664         ir_builtin_kind  kind         = get_Builtin_kind(builtin);
2665         ir_node         *operand      = get_Builtin_param(builtin, 0);
2666         ir_mode         *operand_mode = get_irn_mode(operand);
2667         (void) mode;
2668         if (operand_mode != env->high_signed && operand_mode != env->high_unsigned)
2669                 return;
2670
2671         {
2672         dbg_info              *dbgi              = get_irn_dbg_info(builtin);
2673         ir_type               *type              = get_Builtin_type(builtin);
2674         ir_type               *lowered_type_high = lower_Builtin_type_high(type);
2675         ir_type               *lowered_type_low  = lower_Builtin_type_low(type);
2676         ir_node               *block             = get_nodes_block(builtin);
2677         ir_node               *mem               = get_Builtin_mem(builtin);
2678         const lower64_entry_t *entry             = get_node_entry(operand);
2679         ir_mode               *mode_high         = get_irn_mode(entry->high_word);
2680         ir_node               *res_high;
2681         ir_node               *res_low;
2682
2683         switch (kind) {
2684         case ir_bk_bswap: {
2685                 ir_node               *in_high[1] = { entry->high_word };
2686                 ir_node               *in_low[1]  = { entry->low_word };
2687                 ir_node               *swap_high  = new_rd_Builtin(dbgi, block, mem, 1, in_high, kind, lowered_type_high);
2688                 ir_node               *swap_low   = new_rd_Builtin(dbgi, block, mem, 1, in_low, kind, lowered_type_low);
2689                 ir_node               *high       = new_r_Proj(swap_high, mode_high, pn_Builtin_max+1);
2690                 ir_node               *low        = new_r_Proj(swap_low, env->low_unsigned, pn_Builtin_max+1);
2691                 if (mode_high == env->low_signed) {
2692                         res_high = new_rd_Conv(dbgi, block, low, env->low_signed);
2693                         res_low  = new_rd_Conv(dbgi, block, high, env->low_unsigned);
2694                 } else {
2695                         res_high = low;
2696                         res_low  = high;
2697                 }
2698                 break;
2699         }
2700         default:
2701                 panic("unexpected builtin");
2702         }
2703
2704         /* search result Proj */
2705         foreach_out_edge_safe(builtin, edge) {
2706                 ir_node *proj = get_edge_src_irn(edge);
2707                 if (!is_Proj(proj))
2708                         continue;
2709
2710                 if (get_Proj_proj(proj) == pn_Builtin_max+1) {
2711                         ir_set_dw_lowered(proj, res_low, res_high);
2712                 }
2713         }
2714         }
2715 }
2716
2717 /**
2718  * Lower double word builtins.
2719  */
2720 static void lower_Builtin(ir_node *builtin, ir_mode *mode)
2721 {
2722         ir_builtin_kind kind = get_Builtin_kind(builtin);
2723
2724         switch (kind) {
2725         case ir_bk_trap:
2726         case ir_bk_debugbreak:
2727         case ir_bk_return_address:
2728         case ir_bk_frame_address:
2729         case ir_bk_prefetch:
2730         case ir_bk_inport:
2731         case ir_bk_outport:
2732         case ir_bk_inner_trampoline:
2733                 /* Nothing to do. */
2734                 return;
2735         case ir_bk_bswap:
2736                 lower_arithmetic_builtin(builtin, mode);
2737                 return;
2738         case ir_bk_ffs:
2739         case ir_bk_clz:
2740         case ir_bk_ctz:
2741         case ir_bk_popcount:
2742         case ir_bk_parity:
2743                 lower_reduce_builtin(builtin, mode);
2744                 return;
2745         }
2746         panic("unknown builtin");
2747 }
2748
2749 /**
2750  * check for opcodes that must always be lowered.
2751  */
2752 static bool always_lower(unsigned code)
2753 {
2754         switch (code) {
2755         case iro_ASM:
2756         case iro_Builtin:
2757         case iro_Proj:
2758         case iro_Start:
2759         case iro_Call:
2760         case iro_Return:
2761         case iro_Cond:
2762         case iro_Conv:
2763         case iro_Sel:
2764                 return true;
2765         default:
2766                 return false;
2767         }
2768 }
2769
2770 /**
2771  * Compare two op_mode_entry_t's.
2772  */
2773 static int cmp_op_mode(const void *elt, const void *key, size_t size)
2774 {
2775         const op_mode_entry_t *e1 = (const op_mode_entry_t*)elt;
2776         const op_mode_entry_t *e2 = (const op_mode_entry_t*)key;
2777         (void) size;
2778
2779         return (e1->op != e2->op) | (e1->imode != e2->imode) | (e1->omode != e2->omode);
2780 }
2781
2782 /**
2783  * Compare two conv_tp_entry_t's.
2784  */
2785 static int cmp_conv_tp(const void *elt, const void *key, size_t size)
2786 {
2787         const conv_tp_entry_t *e1 = (const conv_tp_entry_t*)elt;
2788         const conv_tp_entry_t *e2 = (const conv_tp_entry_t*)key;
2789         (void) size;
2790
2791         return (e1->imode != e2->imode) | (e1->omode != e2->omode);
2792 }
2793
2794 /**
2795  * Enter a lowering function into an ir_op.
2796  */
2797 void ir_register_dw_lower_function(ir_op *op, lower_dw_func func)
2798 {
2799         op->ops.generic = (op_func)func;
2800 }
2801
2802 /* Determine which modes need to be lowered */
2803 static void setup_modes(void)
2804 {
2805         unsigned           size_bits           = env->params->doubleword_size;
2806         ir_mode           *doubleword_signed   = NULL;
2807         ir_mode           *doubleword_unsigned = NULL;
2808         size_t             n_modes             = ir_get_n_modes();
2809         ir_mode_arithmetic arithmetic;
2810         unsigned           modulo_shift;
2811         size_t             i;
2812
2813         /* search for doubleword modes... */
2814         for (i = 0; i < n_modes; ++i) {
2815                 ir_mode *mode = ir_get_mode(i);
2816                 if (!mode_is_int(mode))
2817                         continue;
2818                 if (get_mode_size_bits(mode) != size_bits)
2819                         continue;
2820                 if (mode_is_signed(mode)) {
2821                         if (doubleword_signed != NULL) {
2822                                 /* sigh - the lowerer should really just lower all mode with
2823                                  * size_bits it finds. Unfortunately this required a bigger
2824                                  * rewrite. */
2825                                 panic("multiple double word signed modes found");
2826                         }
2827                         doubleword_signed = mode;
2828                 } else {
2829                         if (doubleword_unsigned != NULL) {
2830                                 /* sigh - the lowerer should really just lower all mode with
2831                                  * size_bits it finds. Unfortunately this required a bigger
2832                                  * rewrite. */
2833                                 panic("multiple double word unsigned modes found");
2834                         }
2835                         doubleword_unsigned = mode;
2836                 }
2837         }
2838         if (doubleword_signed == NULL || doubleword_unsigned == NULL) {
2839                 panic("Couldn't find doubleword modes");
2840         }
2841
2842         arithmetic   = get_mode_arithmetic(doubleword_signed);
2843         modulo_shift = get_mode_modulo_shift(doubleword_signed);
2844
2845         assert(get_mode_size_bits(doubleword_unsigned) == size_bits);
2846         assert(size_bits % 2 == 0);
2847         assert(get_mode_sign(doubleword_signed) == 1);
2848         assert(get_mode_sign(doubleword_unsigned) == 0);
2849         assert(get_mode_sort(doubleword_signed) == irms_int_number);
2850         assert(get_mode_sort(doubleword_unsigned) == irms_int_number);
2851         assert(get_mode_arithmetic(doubleword_unsigned) == arithmetic);
2852         assert(get_mode_modulo_shift(doubleword_unsigned) == modulo_shift);
2853
2854         /* try to guess a sensible modulo shift for the new mode.
2855          * (This is IMO another indication that this should really be a node
2856          *  attribute instead of a mode thing) */
2857         if (modulo_shift == size_bits) {
2858                 modulo_shift = modulo_shift / 2;
2859         } else if (modulo_shift == 0) {
2860                 /* fine */
2861         } else {
2862                 panic("Don't know what new modulo shift to use for lowered doubleword mode");
2863         }
2864         size_bits /= 2;
2865
2866         /* produce lowered modes */
2867         env->high_signed   = doubleword_signed;
2868         env->high_unsigned = doubleword_unsigned;
2869         env->low_signed    = new_int_mode("WS", arithmetic, size_bits, 1,
2870                                           modulo_shift);
2871         env->low_unsigned  = new_int_mode("WU", arithmetic, size_bits, 0,
2872                                           modulo_shift);
2873 }
2874
2875 static void enqueue_preds(ir_node *node)
2876 {
2877         int arity = get_irn_arity(node);
2878         int i;
2879
2880         for (i = 0; i < arity; ++i) {
2881                 ir_node *pred = get_irn_n(node, i);
2882                 pdeq_putr(env->waitq, pred);
2883         }
2884 }
2885
2886 static void lower_node(ir_node *node)
2887 {
2888         int              arity;
2889         int              i;
2890         lower_dw_func    func;
2891         ir_op           *op;
2892         ir_mode         *mode;
2893         unsigned         idx;
2894         lower64_entry_t *entry;
2895
2896         if (irn_visited_else_mark(node))
2897                 return;
2898
2899         /* cycles are always broken at Phi and Block nodes. So we don't need special
2900          * magic in all the other lower functions */
2901         if (is_Block(node)) {
2902                 enqueue_preds(node);
2903                 return;
2904         } else if (is_Phi(node)) {
2905                 lower_Phi(node);
2906                 return;
2907         }
2908
2909         /* depth-first: descend into operands */
2910         if (!is_Block(node)) {
2911                 ir_node *block = get_nodes_block(node);
2912                 lower_node(block);
2913         }
2914
2915         if (!is_Cond(node)) {
2916                 arity = get_irn_arity(node);
2917                 for (i = 0; i < arity; ++i) {
2918                         ir_node *pred = get_irn_n(node, i);
2919                         lower_node(pred);
2920                 }
2921         }
2922
2923         op   = get_irn_op(node);
2924         func = (lower_dw_func) op->ops.generic;
2925         if (func == NULL)
2926                 return;
2927
2928         idx   = get_irn_idx(node);
2929         entry = idx < env->n_entries ? env->entries[idx] : NULL;
2930         if (entry != NULL || always_lower(get_irn_opcode(node))) {
2931                 mode = get_irn_op_mode(node);
2932                 if (mode == env->high_signed) {
2933                         mode = env->low_signed;
2934                 } else {
2935                         mode = env->low_unsigned;
2936                 }
2937                 DB((dbg, LEVEL_1, "  %+F\n", node));
2938                 func(node, mode);
2939         }
2940 }
2941
2942 static void clear_node_and_phi_links(ir_node *node, void *data)
2943 {
2944         (void) data;
2945         if (get_irn_mode(node) == mode_T) {
2946                 set_irn_link(node, node);
2947         } else {
2948                 set_irn_link(node, NULL);
2949         }
2950         if (is_Block(node))
2951                 set_Block_phis(node, NULL);
2952         else if (is_Phi(node))
2953                 set_Phi_next(node, NULL);
2954 }
2955
2956 static void lower_irg(ir_graph *irg)
2957 {
2958         ir_entity *ent;
2959         ir_type   *mtp;
2960         ir_type   *lowered_mtp;
2961         unsigned   n_idx;
2962
2963         obstack_init(&env->obst);
2964
2965         /* just here for debugging */
2966         current_ir_graph = irg;
2967         assure_edges(irg);
2968
2969         n_idx = get_irg_last_idx(irg);
2970         n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2971         env->n_entries = n_idx;
2972         env->entries   = NEW_ARR_F(lower64_entry_t*, n_idx);
2973         memset(env->entries, 0, sizeof(env->entries[0]) * n_idx);
2974
2975         env->irg            = irg;
2976         env->flags          = 0;
2977
2978         ent = get_irg_entity(irg);
2979         mtp = get_entity_type(ent);
2980         lowered_mtp = lower_mtp(mtp);
2981
2982         if (lowered_mtp != mtp) {
2983                 set_entity_type(ent, lowered_mtp);
2984                 env->flags |= MUST_BE_LOWERED;
2985
2986                 fix_parameter_entities(irg, mtp);
2987         }
2988
2989         /* first step: link all nodes and allocate data */
2990         ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2991         visit_all_identities(irg, clear_node_and_phi_links, NULL);
2992         irg_walk_graph(irg, NULL, prepare_links_and_handle_rotl, env);
2993
2994         if (env->flags & MUST_BE_LOWERED) {
2995                 size_t i;
2996                 ir_reserve_resources(irg, IR_RESOURCE_IRN_VISITED);
2997                 inc_irg_visited(irg);
2998
2999                 assert(pdeq_empty(env->waitq));
3000                 pdeq_putr(env->waitq, get_irg_end(irg));
3001
3002                 env->lowered_phis = NEW_ARR_F(ir_node*, 0);
3003                 while (!pdeq_empty(env->waitq)) {
3004                         ir_node *node = (ir_node*)pdeq_getl(env->waitq);
3005                         lower_node(node);
3006                 }
3007
3008                 /* we need to fixup phis */
3009                 for (i = 0; i < ARR_LEN(env->lowered_phis); ++i) {
3010                         ir_node *phi = env->lowered_phis[i];
3011                         fixup_phi(phi);
3012                 }
3013                 DEL_ARR_F(env->lowered_phis);
3014
3015
3016                 ir_free_resources(irg, IR_RESOURCE_IRN_VISITED);
3017
3018                 if (env->flags & CF_CHANGED) {
3019                         /* control flow changed, dominance info is invalid */
3020                         clear_irg_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_DOMINANCE);
3021                 }
3022                 edges_deactivate(irg);
3023         }
3024
3025         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
3026
3027         DEL_ARR_F(env->entries);
3028         obstack_free(&env->obst, NULL);
3029 }
3030
3031 static const lwrdw_param_t *param;
3032
3033 void ir_prepare_dw_lowering(const lwrdw_param_t *new_param)
3034 {
3035         assert(new_param != NULL);
3036         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
3037
3038         param = new_param;
3039
3040         ir_clear_opcodes_generic_func();
3041         ir_register_dw_lower_function(op_ASM,     lower_ASM);
3042         ir_register_dw_lower_function(op_Add,     lower_binop);
3043         ir_register_dw_lower_function(op_And,     lower_And);
3044         ir_register_dw_lower_function(op_Bad,     lower_Bad);
3045         ir_register_dw_lower_function(op_Builtin, lower_Builtin);
3046         ir_register_dw_lower_function(op_Call,    lower_Call);
3047         ir_register_dw_lower_function(op_Cmp,     lower_Cmp);
3048         ir_register_dw_lower_function(op_Cond,    lower_Cond);
3049         ir_register_dw_lower_function(op_Const,   lower_Const);
3050         ir_register_dw_lower_function(op_Conv,    lower_Conv);
3051         ir_register_dw_lower_function(op_Div,     lower_Div);
3052         ir_register_dw_lower_function(op_Eor,     lower_Eor);
3053         ir_register_dw_lower_function(op_Load,    lower_Load);
3054         ir_register_dw_lower_function(op_Minus,   lower_unop);
3055         ir_register_dw_lower_function(op_Mod,     lower_Mod);
3056         ir_register_dw_lower_function(op_Mul,     lower_binop);
3057         ir_register_dw_lower_function(op_Mux,     lower_Mux);
3058         ir_register_dw_lower_function(op_Not,     lower_Not);
3059         ir_register_dw_lower_function(op_Or,      lower_Or);
3060         ir_register_dw_lower_function(op_Proj,    lower_Proj);
3061         ir_register_dw_lower_function(op_Return,  lower_Return);
3062         ir_register_dw_lower_function(op_Shl,     lower_Shl);
3063         ir_register_dw_lower_function(op_Shr,     lower_Shr);
3064         ir_register_dw_lower_function(op_Shrs,    lower_Shrs);
3065         ir_register_dw_lower_function(op_Start,   lower_Start);
3066         ir_register_dw_lower_function(op_Store,   lower_Store);
3067         ir_register_dw_lower_function(op_Sub,     lower_binop);
3068         ir_register_dw_lower_function(op_Switch,  lower_Switch);
3069         ir_register_dw_lower_function(op_Unknown, lower_Unknown);
3070 }
3071
3072 /**
3073  * Callback to lower only the Mux nodes we created.
3074  */
3075 static int lower_mux_cb(ir_node *mux)
3076 {
3077         return ir_nodeset_contains(&created_mux_nodes, mux);
3078 }
3079
3080 /*
3081  * Do the lowering.
3082  */
3083 void ir_lower_dw_ops(void)
3084 {
3085         lower_dw_env_t lenv;
3086         size_t      i, n;
3087
3088         memset(&lenv, 0, sizeof(lenv));
3089         lenv.params = param;
3090         env = &lenv;
3091
3092         setup_modes();
3093
3094         /* create the necessary maps */
3095         if (! intrinsic_fkt)
3096                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
3097         if (! conv_types)
3098                 conv_types = new_set(cmp_conv_tp, 16);
3099         if (! lowered_type)
3100                 lowered_type = pmap_create();
3101         if (! lowered_builtin_type_low)
3102                 lowered_builtin_type_low = pmap_create();
3103         if (! lowered_builtin_type_high)
3104                 lowered_builtin_type_high = pmap_create();
3105
3106         /* create a primitive unsigned and signed type */
3107         if (! tp_u)
3108                 tp_u = get_type_for_mode(lenv.low_unsigned);
3109         if (! tp_s)
3110                 tp_s = get_type_for_mode(lenv.low_signed);
3111
3112         /* create method types for the created binop calls */
3113         if (! binop_tp_u) {
3114                 binop_tp_u = new_type_method(4, 2);
3115                 set_method_param_type(binop_tp_u, 0, tp_u);
3116                 set_method_param_type(binop_tp_u, 1, tp_u);
3117                 set_method_param_type(binop_tp_u, 2, tp_u);
3118                 set_method_param_type(binop_tp_u, 3, tp_u);
3119                 set_method_res_type(binop_tp_u, 0, tp_u);
3120                 set_method_res_type(binop_tp_u, 1, tp_u);
3121         }
3122         if (! binop_tp_s) {
3123                 binop_tp_s = new_type_method(4, 2);
3124                 if (env->params->little_endian) {
3125                         set_method_param_type(binop_tp_s, 0, tp_u);
3126                         set_method_param_type(binop_tp_s, 1, tp_s);
3127                         set_method_param_type(binop_tp_s, 2, tp_u);
3128                         set_method_param_type(binop_tp_s, 3, tp_s);
3129                         set_method_res_type(binop_tp_s, 0, tp_u);
3130                         set_method_res_type(binop_tp_s, 1, tp_s);
3131                 } else {
3132                         set_method_param_type(binop_tp_s, 0, tp_s);
3133                         set_method_param_type(binop_tp_s, 1, tp_u);
3134                         set_method_param_type(binop_tp_s, 2, tp_s);
3135                         set_method_param_type(binop_tp_s, 3, tp_u);
3136                         set_method_res_type(binop_tp_s, 0, tp_s);
3137                         set_method_res_type(binop_tp_s, 1, tp_u);
3138                 }
3139         }
3140         if (! unop_tp_u) {
3141                 unop_tp_u = new_type_method(2, 2);
3142                 set_method_param_type(unop_tp_u, 0, tp_u);
3143                 set_method_param_type(unop_tp_u, 1, tp_u);
3144                 set_method_res_type(unop_tp_u, 0, tp_u);
3145                 set_method_res_type(unop_tp_u, 1, tp_u);
3146         }
3147         if (! unop_tp_s) {
3148                 unop_tp_s = new_type_method(2, 2);
3149                 if (env->params->little_endian) {
3150                         set_method_param_type(unop_tp_s, 0, tp_u);
3151                         set_method_param_type(unop_tp_s, 1, tp_s);
3152                         set_method_res_type(unop_tp_s, 0, tp_u);
3153                         set_method_res_type(unop_tp_s, 1, tp_s);
3154                 } else {
3155                         set_method_param_type(unop_tp_s, 0, tp_s);
3156                         set_method_param_type(unop_tp_s, 1, tp_u);
3157                         set_method_res_type(unop_tp_s, 0, tp_s);
3158                         set_method_res_type(unop_tp_s, 1, tp_u);
3159                 }
3160         }
3161
3162         lenv.tv_mode_bytes = new_tarval_from_long(param->doubleword_size/(2*8), lenv.low_unsigned);
3163         lenv.tv_mode_bits  = new_tarval_from_long(param->doubleword_size/2, lenv.low_unsigned);
3164         lenv.waitq         = new_pdeq();
3165         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
3166         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
3167
3168         irp_reserve_resources(irp, IRP_RESOURCE_TYPE_LINK | IRP_RESOURCE_TYPE_VISITED);
3169         inc_master_type_visited();
3170         /* transform all graphs */
3171         for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
3172                 ir_graph *irg = get_irp_irg(i);
3173
3174                 ir_nodeset_init(&created_mux_nodes);
3175
3176                 lower_irg(irg);
3177
3178                 if (ir_nodeset_size(&created_mux_nodes) > 0)
3179                         lower_mux(irg, lower_mux_cb);
3180
3181                 ir_nodeset_destroy(&created_mux_nodes);
3182         }
3183         irp_free_resources(irp, IRP_RESOURCE_TYPE_LINK | IRP_RESOURCE_TYPE_VISITED);
3184         del_pdeq(lenv.waitq);
3185
3186         env = NULL;
3187 }
3188
3189 /* Default implementation. */
3190 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
3191                                     const ir_mode *imode, const ir_mode *omode,
3192                                     void *context)
3193 {
3194         char buf[64];
3195         ident *id;
3196         ir_entity *ent;
3197         (void) context;
3198
3199         if (imode == omode) {
3200                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
3201         } else {
3202                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
3203                         get_mode_name(imode), get_mode_name(omode));
3204         }
3205         id = new_id_from_str(buf);
3206
3207         ent = new_entity(get_glob_type(), id, method);
3208         set_entity_ld_ident(ent, get_entity_ident(ent));
3209         set_entity_visibility(ent, ir_visibility_external);
3210         return ent;
3211 }