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