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