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  * @version $Id$
  26  */
  27 #include "config.h"
  28
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <stdbool.h>
  32 #include <assert.h>
  33
  34 #include "error.h"
  35 #include "lowering.h"
  36 #include "irnode_t.h"
  37 #include "irgraph_t.h"
  38 #include "irmode_t.h"
  39 #include "iropt_t.h"
  40 #include "irgmod.h"
  41 #include "tv_t.h"
  42 #include "dbginfo_t.h"
  43 #include "iropt_dbg.h"
  44 #include "irflag_t.h"
  45 #include "firmstat.h"
  46 #include "irgwalk.h"
  47 #include "ircons.h"
  48 #include "irflag.h"
  49 #include "irtools.h"
  50 #include "debug.h"
  51 #include "set.h"
  52 #include "pmap.h"
  53 #include "pdeq.h"
  54 #include "irdump.h"
  55 #include "array_t.h"
  56 #include "irpass_t.h"
  57
  58 typedef struct lower_env_t lower_env_t;
  59
  60 /**
  61  * The type of a lower function.
  62  *
  63  * @param node   the node to be lowered
  64  * @param env    the lower environment
  65  */
  66 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
  67
  68 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  69 static set *intrinsic_fkt;
  70
  71 /** A map from (imode, omode) to conv function types. */
  72 static set *conv_types;
  73
  74 /** A map from a method type to its lowered type. */
  75 static pmap *lowered_type;
  76
  77 /** The types for the binop and unop intrinsics. */
  78 static ir_type *binop_tp_u, *binop_tp_s, *unop_tp_u, *unop_tp_s, *shiftop_tp_u, *shiftop_tp_s, *tp_s, *tp_u;
  79
  80 /** the debug handle */
  81 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  82
  83 /**
  84  * An entry in the (op, imode, omode) -> entity map.
  85  */
  86 typedef struct op_mode_entry {
  87         const ir_op   *op;    /**< the op */
  88         const ir_mode *imode; /**< the input mode */
  89         const ir_mode *omode; /**< the output mode */
  90         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  91 } op_mode_entry_t;
  92
  93 /**
  94  * An entry in the (imode, omode) -> tp map.
  95  */
  96 typedef struct conv_tp_entry {
  97         const ir_mode *imode; /**< the input mode */
  98         const ir_mode *omode; /**< the output mode */
  99         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
 100 } conv_tp_entry_t;
 101
 102 /**
 103  * Every double word node will be replaced,
 104  * we need some store to hold the replacement:
 105  */
 106 typedef struct node_entry_t {
 107         ir_node *low_word;    /**< the low word */
 108         ir_node *high_word;   /**< the high word */
 109 } node_entry_t;
 110
 111 enum lower_flags {
 112         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 113         CF_CHANGED      = 2,  /**< control flow was changed */
 114 };
 115
 116 /**
 117  * The lower environment.
 118  */
 119 struct lower_env_t {
 120         node_entry_t **entries;       /**< entries per node */
 121         ir_graph      *irg;
 122         struct obstack obst;          /**< an obstack holding the temporary data */
 123         ir_type   *l_mtp;              /**< lowered method type of the current method */
 124         ir_tarval *tv_mode_bytes;     /**< a tarval containing the number of bytes in the lowered modes */
 125         ir_tarval *tv_mode_bits;      /**< a tarval containing the number of bits in the lowered modes */
 126         pdeq      *waitq;              /**< a wait queue of all nodes that must be handled later */
 127         ir_node  **lowered_phis;       /**< list of lowered phis */
 128         pmap      *proj_2_block;       /**< a map from ProjX to its destination blocks */
 129         ir_mode   *high_signed;        /**< doubleword signed type */
 130         ir_mode   *high_unsigned;      /**< doubleword unsigned type */
 131         ir_mode   *low_signed;         /**< word signed type */
 132         ir_mode   *low_unsigned;       /**< word unsigned type */
 133         ident     *first_id;           /**< .l for little and .h for big endian */
 134         ident     *next_id;            /**< .h for little and .l for big endian */
 135         const lwrdw_param_t *params;  /**< transformation parameter */
 136         unsigned flags;               /**< some flags */
 137         unsigned n_entries;           /**< number of entries */
 138         ir_type  *value_param_tp;     /**< the old value param type */
 139 };
 140
 141 static void lower_node(lower_env_t *env, ir_node *node);
 142
 143 /**
 144  * Create a method type for a Conv emulation from imode to omode.
 145  */
 146 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env)
 147 {
 148         conv_tp_entry_t key, *entry;
 149         ir_type *mtd;
 150
 151         key.imode = imode;
 152         key.omode = omode;
 153         key.mtd   = NULL;
 154
 155         entry = (conv_tp_entry_t*)set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 156         if (! entry->mtd) {
 157                 int n_param = 1, n_res = 1;
 158
 159                 if (imode == env->high_signed || imode == env->high_unsigned)
 160                         n_param = 2;
 161                 if (omode == env->high_signed || omode == env->high_unsigned)
 162                         n_res = 2;
 163
 164                 /* create a new one */
 165                 mtd = new_type_method(n_param, n_res);
 166
 167                 /* set param types and result types */
 168                 n_param = 0;
 169                 if (imode == env->high_signed) {
 170                         set_method_param_type(mtd, n_param++, tp_u);
 171                         set_method_param_type(mtd, n_param++, tp_s);
 172                 } else if (imode == env->high_unsigned) {
 173                         set_method_param_type(mtd, n_param++, tp_u);
 174                         set_method_param_type(mtd, n_param++, tp_u);
 175                 } else {
 176                         ir_type *tp = get_type_for_mode(imode);
 177                         set_method_param_type(mtd, n_param++, tp);
 178                 }
 179
 180                 n_res = 0;
 181                 if (omode == env->high_signed) {
 182                         set_method_res_type(mtd, n_res++, tp_u);
 183                         set_method_res_type(mtd, n_res++, tp_s);
 184                 } else if (omode == env->high_unsigned) {
 185                         set_method_res_type(mtd, n_res++, tp_u);
 186                         set_method_res_type(mtd, n_res++, tp_u);
 187                 } else {
 188                         ir_type *tp = get_type_for_mode(omode);
 189                         set_method_res_type(mtd, n_res++, tp);
 190                 }
 191                 entry->mtd = mtd;
 192         } else {
 193                 mtd = entry->mtd;
 194         }
 195         return mtd;
 196 }
 197
 198 /**
 199  * Add an additional control flow input to a block.
 200  * Patch all Phi nodes. The new Phi inputs are copied from
 201  * old input number nr.
 202  */
 203 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 204 {
 205         int i, arity = get_irn_arity(block);
 206         ir_node **in, *phi;
 207
 208         assert(nr < arity);
 209
 210         NEW_ARR_A(ir_node *, in, arity + 1);
 211         for (i = 0; i < arity; ++i)
 212                 in[i] = get_irn_n(block, i);
 213         in[i] = cf;
 214
 215         set_irn_in(block, i + 1, in);
 216
 217         for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
 218                 for (i = 0; i < arity; ++i)
 219                         in[i] = get_irn_n(phi, i);
 220                 in[i] = in[nr];
 221                 set_irn_in(phi, i + 1, in);
 222         }
 223 }
 224
 225 /**
 226  * Add an additional control flow input to a block.
 227  * Patch all Phi nodes. The new Phi inputs are copied from
 228  * old input from cf tmpl.
 229  */
 230 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 231 {
 232         int i, arity = get_irn_arity(block);
 233         int nr = 0;
 234
 235         for (i = 0; i < arity; ++i) {
 236                 if (get_irn_n(block, i) == tmpl) {
 237                         nr = i;
 238                         break;
 239                 }
 240         }
 241         assert(i < arity);
 242         add_block_cf_input_nr(block, nr, cf);
 243 }
 244
 245 /**
 246  * Return the "operational" mode of a Firm node.
 247  */
 248 static ir_mode *get_irn_op_mode(ir_node *node)
 249 {
 250         switch (get_irn_opcode(node)) {
 251         case iro_Load:
 252                 return get_Load_mode(node);
 253         case iro_Store:
 254                 return get_irn_mode(get_Store_value(node));
 255         case iro_Div:
 256                 return get_irn_mode(get_Div_left(node));
 257         case iro_Mod:
 258                 return get_irn_mode(get_Mod_left(node));
 259         case iro_Cmp:
 260                 return get_irn_mode(get_Cmp_left(node));
 261         default:
 262                 return get_irn_mode(node);
 263         }
 264 }
 265
 266 /**
 267  * Walker, prepare the node links and determine which nodes need to be lowered
 268  * at all.
 269  */
 270 static void prepare_links(lower_env_t *env, ir_node *node)
 271 {
 272         ir_mode      *mode = get_irn_op_mode(node);
 273         node_entry_t *link;
 274         int           i;
 275
 276         if (mode == env->high_signed || mode == env->high_unsigned) {
 277                 unsigned idx = get_irn_idx(node);
 278                 /* ok, found a node that will be lowered */
 279                 link = OALLOCZ(&env->obst, node_entry_t);
 280
 281                 if (idx >= env->n_entries) {
 282                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 283                         unsigned old   = env->n_entries;
 284                         unsigned n_idx = idx + (idx >> 3);
 285
 286                         ARR_RESIZE(node_entry_t *, env->entries, n_idx);
 287                         memset(&env->entries[old], 0, (n_idx - old) * sizeof(env->entries[0]));
 288                         env->n_entries = n_idx;
 289                 }
 290                 env->entries[idx] = link;
 291                 env->flags |= MUST_BE_LOWERED;
 292         } else if (is_Conv(node)) {
 293                 /* Conv nodes have two modes */
 294                 ir_node *pred = get_Conv_op(node);
 295                 mode = get_irn_mode(pred);
 296
 297                 if (mode == env->high_signed || mode == env->high_unsigned) {
 298                         /* must lower this node either but don't need a link */
 299                         env->flags |= MUST_BE_LOWERED;
 300                 }
 301                 return;
 302         }
 303
 304         if (is_Proj(node)) {
 305                 /* link all Proj nodes to its predecessor:
 306                    Note that Tuple Proj's and its Projs are linked either. */
 307                 ir_node *pred = get_Proj_pred(node);
 308
 309                 set_irn_link(node, get_irn_link(pred));
 310                 set_irn_link(pred, node);
 311         } else if (is_Phi(node)) {
 312                 /* link all Phi nodes to its block */
 313                 ir_node *block = get_nodes_block(node);
 314                 add_Block_phi(block, node);
 315         } else if (is_Block(node)) {
 316                 /* fill the Proj -> Block map */
 317                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 318                         ir_node *pred = get_Block_cfgpred(node, i);
 319
 320                         if (is_Proj(pred))
 321                                 pmap_insert(env->proj_2_block, pred, node);
 322                 }
 323         }
 324 }
 325
 326 static node_entry_t *get_node_entry(lower_env_t *env, ir_node *node)
 327 {
 328         unsigned idx = get_irn_idx(node);
 329         assert(idx < env->n_entries);
 330         return env->entries[idx];
 331 }
 332
 333 static void set_lowered(lower_env_t *env, ir_node *old,
 334                         ir_node *new_low, ir_node *new_high)
 335 {
 336         node_entry_t *entry = get_node_entry(env, old);
 337         entry->low_word  = new_low;
 338         entry->high_word = new_high;
 339 }
 340
 341 /**
 342  * Translate a Constant: create two.
 343  */
 344 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env)
 345 {
 346         ir_graph  *irg      = get_irn_irg(node);
 347         dbg_info  *dbg      = get_irn_dbg_info(node);
 348         ir_mode   *low_mode = env->low_unsigned;
 349         ir_tarval *tv       = get_Const_tarval(node);
 350         ir_tarval *tv_l     = tarval_convert_to(tv, low_mode);
 351         ir_node   *res_low  = new_rd_Const(dbg, irg, tv_l);
 352         ir_tarval *tv_shrs  = tarval_shrs(tv, env->tv_mode_bits);
 353         ir_tarval *tv_h     = tarval_convert_to(tv_shrs, mode);
 354         ir_node   *res_high = new_rd_Const(dbg, irg, tv_h);
 355
 356         set_lowered(env, node, res_low, res_high);
 357 }
 358
 359 /**
 360  * Translate a Load: create two.
 361  */
 362 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env)
 363 {
 364         ir_mode    *low_mode = env->low_unsigned;
 365         ir_graph   *irg = get_irn_irg(node);
 366         ir_node    *adr = get_Load_ptr(node);
 367         ir_node    *mem = get_Load_mem(node);
 368         ir_node    *low, *high, *proj;
 369         dbg_info   *dbg;
 370         ir_node    *block = get_nodes_block(node);
 371         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 372                                  ? cons_volatile : cons_none;
 373
 374         if (env->params->little_endian) {
 375                 low  = adr;
 376                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 377         } else {
 378                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 379                 high = adr;
 380         }
 381
 382         /* create two loads */
 383         dbg  = get_irn_dbg_info(node);
 384         low  = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 385         proj = new_r_Proj(low, mode_M, pn_Load_M);
 386         high = new_rd_Load(dbg, block, proj, high, mode, volatility);
 387
 388         set_lowered(env, node, low, high);
 389
 390         for (proj = (ir_node*)get_irn_link(node); proj;
 391              proj = (ir_node*)get_irn_link(proj)) {
 392                 switch (get_Proj_proj(proj)) {
 393                 case pn_Load_M:         /* Memory result. */
 394                         /* put it to the second one */
 395                         set_Proj_pred(proj, high);
 396                         break;
 397                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 398                         /* put it to the first one */
 399                         set_Proj_pred(proj, low);
 400                         break;
 401                 case pn_Load_res: {       /* Result of load operation. */
 402                         ir_node *res_low  = new_r_Proj(low,  low_mode, pn_Load_res);
 403                         ir_node *res_high = new_r_Proj(high, mode,     pn_Load_res);
 404                         set_lowered(env, proj, res_low, res_high);
 405                         break;
 406                 }
 407                 default:
 408                         assert(0 && "unexpected Proj number");
 409                 }
 410                 /* mark this proj: we have handled it already, otherwise we might fall
 411                  * into out new nodes. */
 412                 mark_irn_visited(proj);
 413         }
 414 }
 415
 416 /**
 417  * Translate a Store: create two.
 418  */
 419 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env)
 420 {
 421         ir_graph     *irg;
 422         ir_node      *block, *adr, *mem;
 423         ir_node      *low, *high, *proj;
 424         dbg_info     *dbg;
 425         ir_node            *value = get_Store_value(node);
 426         const node_entry_t *entry = get_node_entry(env, value);
 427         ir_cons_flags volatility = get_Store_volatility(node) == volatility_is_volatile
 428                                    ? cons_volatile : cons_none;
 429         (void) mode;
 430
 431         assert(entry);
 432
 433         if (! entry->low_word) {
 434                 /* not ready yet, wait */
 435                 pdeq_putr(env->waitq, node);
 436                 return;
 437         }
 438
 439         irg = get_irn_irg(node);
 440         adr = get_Store_ptr(node);
 441         mem = get_Store_mem(node);
 442         block = get_nodes_block(node);
 443
 444         if (env->params->little_endian) {
 445                 low  = adr;
 446                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 447         } else {
 448                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 449                 high = adr;
 450         }
 451
 452         /* create two Stores */
 453         dbg = get_irn_dbg_info(node);
 454         low  = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 455         proj = new_r_Proj(low, mode_M, pn_Store_M);
 456         high = new_rd_Store(dbg, block, proj, high, entry->high_word, volatility);
 457
 458         set_lowered(env, node, low, high);
 459
 460         for (proj = (ir_node*)get_irn_link(node); proj;
 461              proj = (ir_node*)get_irn_link(proj)) {
 462                 switch (get_Proj_proj(proj)) {
 463                 case pn_Store_M:         /* Memory result. */
 464                         /* put it to the second one */
 465                         set_Proj_pred(proj, high);
 466                         break;
 467                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 468                         /* put it to the first one */
 469                         set_Proj_pred(proj, low);
 470                         break;
 471                 default:
 472                         assert(0 && "unexpected Proj number");
 473                 }
 474                 /* mark this proj: we have handled it already, otherwise we might fall into
 475                  * out new nodes. */
 476                 mark_irn_visited(proj);
 477         }
 478 }
 479
 480 /**
 481  * Return a node containing the address of the intrinsic emulation function.
 482  *
 483  * @param method  the method type of the emulation function
 484  * @param op      the emulated ir_op
 485  * @param imode   the input mode of the emulated opcode
 486  * @param omode   the output mode of the emulated opcode
 487  * @param env     the lower environment
 488  */
 489 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 490                                       ir_mode *imode, ir_mode *omode,
 491                                       lower_env_t *env)
 492 {
 493         symconst_symbol sym;
 494         ir_entity *ent;
 495         op_mode_entry_t key, *entry;
 496
 497         key.op    = op;
 498         key.imode = imode;
 499         key.omode = omode;
 500         key.ent   = NULL;
 501
 502         entry = (op_mode_entry_t*)set_insert(intrinsic_fkt, &key, sizeof(key),
 503                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 504         if (! entry->ent) {
 505                 /* create a new one */
 506                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 507
 508                 assert(ent && "Intrinsic creator must return an entity");
 509                 entry->ent = ent;
 510         } else {
 511                 ent = entry->ent;
 512         }
 513         sym.entity_p = ent;
 514         return new_r_SymConst(env->irg, mode_P_code, sym, symconst_addr_ent);
 515 }
 516
 517 /**
 518  * Translate a Div.
 519  *
 520  * Create an intrinsic Call.
 521  */
 522 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env)
 523 {
 524         ir_node            *left        = get_Div_left(node);
 525         ir_node            *right       = get_Div_right(node);
 526         const node_entry_t *left_entry  = get_node_entry(env, left);
 527         const node_entry_t *right_entry = get_node_entry(env, right);
 528         ir_node            *block       = get_nodes_block(node);
 529         dbg_info           *dbgi        = get_irn_dbg_info(node);
 530         ir_type            *mtp
 531                 = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 532         ir_mode            *opmode = get_irn_op_mode(node);
 533         ir_node            *addr
 534                 = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 535         ir_node  *in[4] = {
 536                 left_entry->low_word, left_entry->high_word,
 537                 right_entry->low_word, right_entry->high_word };
 538         ir_node            *call
 539                 = new_rd_Call(dbgi, block, get_Div_mem(node), addr, 4, in, mtp);
 540         ir_node            *resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
 541         ir_node            *proj;
 542
 543         set_irn_pinned(call, get_irn_pinned(node));
 544
 545         for (proj = (ir_node*)get_irn_link(node); proj;
 546              proj = (ir_node*)get_irn_link(proj)) {
 547                 switch (get_Proj_proj(proj)) {
 548                 case pn_Div_M:         /* Memory result. */
 549                         /* reroute to the call */
 550                         set_Proj_pred(proj, call);
 551                         set_Proj_proj(proj, pn_Call_M);
 552                         break;
 553                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 554                         /* reroute to the call */
 555                         set_Proj_pred(proj, call);
 556                         set_Proj_proj(proj, pn_Call_X_except);
 557                         break;
 558                 case pn_Div_res: {
 559                         /* Result of computation. */
 560                         ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 561                         ir_node *res_high = new_r_Proj(resproj, mode,              1);
 562                         set_lowered(env, proj, res_low, res_high);
 563                         break;
 564                 }
 565                 default:
 566                         assert(0 && "unexpected Proj number");
 567                 }
 568                 /* mark this proj: we have handled it already, otherwise we might fall into
 569                  * out new nodes. */
 570                 mark_irn_visited(proj);
 571         }
 572 }
 573
 574 /**
 575  * Translate a Mod.
 576  *
 577  * Create an intrinsic Call.
 578  */
 579 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env)
 580 {
 581         ir_node            *left        = get_Mod_left(node);
 582         ir_node            *right       = get_Mod_right(node);
 583         const node_entry_t *left_entry  = get_node_entry(env, left);
 584         const node_entry_t *right_entry = get_node_entry(env, right);
 585         ir_node            *in[4]       = {
 586                 left_entry->low_word, left_entry->high_word,
 587                 right_entry->low_word, right_entry->high_word
 588         };
 589         dbg_info           *dbgi        = get_irn_dbg_info(node);
 590         ir_node            *block       = get_nodes_block(node);
 591         ir_type            *mtp
 592                 = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 593         ir_mode            *opmode = get_irn_op_mode(node);
 594         ir_node            *addr
 595                 = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 596         ir_node            *call
 597                 = new_rd_Call(dbgi, block, get_Mod_mem(node), addr, 4, in, mtp);
 598         ir_node            *resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
 599         ir_node            *proj;
 600         set_irn_pinned(call, get_irn_pinned(node));
 601
 602         for (proj = (ir_node*)get_irn_link(node); proj;
 603              proj = (ir_node*)get_irn_link(proj)) {
 604                 switch (get_Proj_proj(proj)) {
 605                 case pn_Mod_M:         /* Memory result. */
 606                         /* reroute to the call */
 607                         set_Proj_pred(proj, call);
 608                         set_Proj_proj(proj, pn_Call_M);
 609                         break;
 610                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 611                         /* reroute to the call */
 612                         set_Proj_pred(proj, call);
 613                         set_Proj_proj(proj, pn_Call_X_except);
 614                         break;
 615                 case pn_Mod_res: {
 616                         /* Result of computation. */
 617                         ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 618                         ir_node *res_high = new_r_Proj(resproj, mode,              1);
 619                         set_lowered(env, proj, res_low, res_high);
 620                         break;
 621                 }
 622                 default:
 623                         assert(0 && "unexpected Proj number");
 624                 }
 625                 /* mark this proj: we have handled it already, otherwise we might fall
 626                  * into out new nodes. */
 627                 mark_irn_visited(proj);
 628         }
 629 }
 630
 631 /**
 632  * Translate a binop.
 633  *
 634  * Create an intrinsic Call.
 635  */
 636 static void lower_binop(ir_node *node, ir_mode *mode, lower_env_t *env)
 637 {
 638         ir_node            *left        = get_binop_left(node);
 639         ir_node            *right       = get_binop_right(node);
 640         const node_entry_t *left_entry  = get_node_entry(env, left);
 641         const node_entry_t *right_entry = get_node_entry(env, right);
 642         ir_node            *in[4]       = {
 643                 left_entry->low_word, left_entry->high_word,
 644                 right_entry->low_word, right_entry->high_word
 645         };
 646         dbg_info           *dbgi        = get_irn_dbg_info(node);
 647         ir_node            *block       = get_nodes_block(node);
 648         ir_graph           *irg         = get_irn_irg(block);
 649         ir_type            *mtp
 650                 = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 651         ir_node            *addr
 652                 = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 653         ir_node            *call
 654                 = new_rd_Call(dbgi, block, get_irg_no_mem(irg), addr, 4, in, mtp);
 655         ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
 656         ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 657         ir_node            *res_high = new_r_Proj(resproj, mode,              1);
 658         set_irn_pinned(call, get_irn_pinned(node));
 659         set_lowered(env, node, res_low, res_high);
 660 }
 661
 662 /**
 663  * Translate a Shiftop.
 664  *
 665  * Create an intrinsic Call.
 666  */
 667 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env)
 668 {
 669         ir_node            *block      = get_nodes_block(node);
 670         ir_node            *left       = get_binop_left(node);
 671         const node_entry_t *left_entry = get_node_entry(env, left);
 672         ir_node            *right      = get_binop_right(node);
 673         ir_node            *in[3]      = {
 674                 left_entry->low_word, left_entry->high_word,
 675                 /* it should be safe to conv to low_unsigned */
 676                 new_r_Conv(block, right, env->low_unsigned)
 677         };
 678         dbg_info           *dbgi       = get_irn_dbg_info(node);
 679         ir_graph           *irg        = get_irn_irg(block);
 680         ir_type            *mtp
 681                 = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 682         ir_node            *addr
 683                 = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 684         ir_node            *call
 685                 = new_rd_Call(dbgi, block, get_irg_no_mem(irg), addr, 3, in, mtp);
 686         ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
 687         ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 688         ir_node            *res_high = new_r_Proj(resproj, mode,              1);
 689
 690         set_irn_pinned(call, get_irn_pinned(node));
 691         set_lowered(env, node, res_low, res_high);
 692 }
 693
 694 /**
 695  * Translate a Shr and handle special cases.
 696  */
 697 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env)
 698 {
 699         ir_graph *irg   = get_irn_irg(node);
 700         ir_node  *right = get_Shr_right(node);
 701
 702         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 703                 ir_tarval *tv = get_Const_tarval(right);
 704
 705                 if (tarval_is_long(tv) &&
 706                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 707                         ir_node *block        = get_nodes_block(node);
 708                         ir_node *left         = get_Shr_left(node);
 709                         ir_mode *low_unsigned = env->low_unsigned;
 710                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 711                         const node_entry_t *left_entry = get_node_entry(env, left);
 712                         ir_node *res_low;
 713                         ir_node *res_high;
 714
 715                         left = left_entry->high_word;
 716
 717                         /* convert high word into low_unsigned mode if necessary */
 718                         if (get_irn_mode(left) != low_unsigned)
 719                                 left = new_r_Conv(block, left, low_unsigned);
 720
 721                         if (shf_cnt > 0) {
 722                                 ir_node *c = new_r_Const_long(irg, low_unsigned, shf_cnt);
 723                                 res_low = new_r_Shr(block, left, c, low_unsigned);
 724                         } else {
 725                                 res_low = left;
 726                         }
 727                         res_high = new_r_Const(irg, get_mode_null(mode));
 728                         set_lowered(env, node, res_low, res_high);
 729
 730                         return;
 731                 }
 732         }
 733         lower_Shiftop(node, mode, env);
 734 }
 735
 736 /**
 737  * Translate a Shl and handle special cases.
 738  */
 739 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env)
 740 {
 741         ir_graph *irg   = get_irn_irg(node);
 742         ir_node  *right = get_Shl_right(node);
 743
 744         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 745                 ir_tarval *tv = get_Const_tarval(right);
 746
 747                 if (tarval_is_long(tv)) {
 748                         long value = get_tarval_long(tv);
 749                     if (value >= (long)get_mode_size_bits(mode)) {
 750                                 /* simple case: shift above the lower word */
 751                                 ir_mode *mode_l;
 752                                 ir_node *block = get_nodes_block(node);
 753                                 ir_node *left = get_Shl_left(node);
 754                                 ir_node *c;
 755                                 long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 756                                 const node_entry_t *left_entry = get_node_entry(env, left);
 757                                 ir_node  *res_low;
 758                                 ir_node  *res_high;
 759
 760                                 left = left_entry->low_word;
 761                                 left = new_r_Conv(block, left, mode);
 762
 763                                 mode_l = env->low_unsigned;
 764                                 if (shf_cnt > 0) {
 765                                         c        = new_r_Const_long(irg, mode_l, shf_cnt);
 766                                         res_high = new_r_Shl(block, left, c, mode);
 767                                 } else {
 768                                         res_high = left;
 769                                 }
 770                                 res_low = new_r_Const(irg, get_mode_null(mode_l));
 771                                 set_lowered(env, node, res_low, res_high);
 772
 773                                 return;
 774                         }
 775                         if (value == 1) {
 776                                 /* left << 1 == left + left */
 777                                 ir_node            *left        = get_binop_left(node);
 778                                 const node_entry_t *left_entry  = get_node_entry(env, left);
 779                                 ir_node            *in[4]       = {
 780                                         left_entry->low_word, left_entry->high_word,
 781                                         left_entry->low_word, left_entry->high_word,
 782                                 };
 783                                 dbg_info           *dbgi        = get_irn_dbg_info(node);
 784                                 ir_node            *block       = get_nodes_block(node);
 785                                 ir_graph           *irg         = get_irn_irg(block);
 786                                 ir_type            *mtp
 787                                         = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 788                                 ir_node            *addr
 789                                         = get_intrinsic_address(mtp, op_Add, mode, mode, env);
 790                                 ir_node            *call
 791                                         = new_rd_Call(dbgi, block, get_irg_no_mem(irg), addr, 4, in, mtp);
 792                                 ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
 793                                 ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 794                                 ir_node            *res_high = new_r_Proj(resproj, mode,              1);
 795                                 set_irn_pinned(call, get_irn_pinned(node));
 796                                 set_lowered(env, node, res_low, res_high);
 797
 798                                 return;
 799                         }
 800                 }
 801         }
 802         lower_Shiftop(node, mode, env);
 803 }
 804
 805 /**
 806  * Translate a Shrs and handle special cases.
 807  */
 808 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env)
 809 {
 810         ir_graph *irg   = get_irn_irg(node);
 811         ir_node  *right = get_Shrs_right(node);
 812
 813         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 814                 ir_tarval *tv = get_Const_tarval(right);
 815
 816                 if (tarval_is_long(tv) &&
 817                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 818                         ir_node *block         = get_nodes_block(node);
 819                         ir_node *left          = get_Shrs_left(node);
 820                         ir_mode *low_unsigned  = env->low_unsigned;
 821                         long     shf_cnt       = get_tarval_long(tv) - get_mode_size_bits(mode);
 822                         const node_entry_t *left_entry = get_node_entry(env, left);
 823                         ir_node *left_unsigned = left;
 824                         ir_node *res_low;
 825                         ir_node *res_high;
 826                         ir_node *c;
 827
 828                         left = left_entry->high_word;
 829
 830                         /* convert high word into low_unsigned mode if necessary */
 831                         if (get_irn_mode(left_unsigned) != low_unsigned)
 832                                 left_unsigned = new_r_Conv(block, left, low_unsigned);
 833
 834                         if (shf_cnt > 0) {
 835                                 c       = new_r_Const_long(irg, low_unsigned, shf_cnt);
 836                                 res_low = new_r_Shrs(block, left_unsigned, c, low_unsigned);
 837                         } else {
 838                                 res_low = left_unsigned;
 839                         }
 840
 841                         c        = new_r_Const(irg, get_mode_all_one(low_unsigned));
 842                         res_high = new_r_Shrs(block, left, c, mode);
 843                         set_lowered(env, node, res_low, res_high);
 844                         return;
 845                 }
 846         }
 847         lower_Shiftop(node, mode, env);
 848 }
 849
 850 /**
 851  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
 852  */
 853 static void prepare_links_and_handle_rotl(ir_node *node, void *env)
 854 {
 855         lower_env_t *lenv = (lower_env_t*)env;
 856
 857         if (is_Rotl(node)) {
 858                 ir_mode  *mode = get_irn_op_mode(node);
 859                 ir_node  *right;
 860                 ir_node  *left, *shl, *shr, *ornode, *block, *sub, *c;
 861                 ir_mode  *omode, *rmode;
 862                 ir_graph *irg;
 863                 dbg_info *dbg;
 864                 optimization_state_t state;
 865
 866                 if (mode != lenv->high_signed && mode != lenv->high_unsigned) {
 867                         prepare_links(lenv, node);
 868                         return;
 869                 }
 870
 871                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) */
 872                 right = get_Rotl_right(node);
 873                 irg   = get_irn_irg(node);
 874                 dbg   = get_irn_dbg_info(node);
 875                 omode = get_irn_mode(node);
 876                 left  = get_Rotl_left(node);
 877                 block = get_nodes_block(node);
 878                 shl   = new_rd_Shl(dbg, block, left, right, omode);
 879                 rmode = get_irn_mode(right);
 880                 c     = new_r_Const_long(irg, rmode, get_mode_size_bits(omode));
 881                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
 882                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
 883
 884                 /* switch optimization off here, or we will get the Rotl back */
 885                 save_optimization_state(&state);
 886                 set_opt_algebraic_simplification(0);
 887                 ornode = new_rd_Or(dbg, block, shl, shr, omode);
 888                 restore_optimization_state(&state);
 889
 890                 exchange(node, ornode);
 891
 892                 /* do lowering on the new nodes */
 893                 prepare_links(lenv, shl);
 894                 prepare_links(lenv, c);
 895                 prepare_links(lenv, sub);
 896                 prepare_links(lenv, shr);
 897                 prepare_links(lenv, ornode);
 898                 return;
 899         }
 900
 901         prepare_links(lenv, node);
 902 }
 903
 904 /**
 905  * Translate an Unop.
 906  *
 907  * Create an intrinsic Call.
 908  */
 909 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env)
 910 {
 911         ir_node            *op       = get_unop_op(node);
 912         const node_entry_t *op_entry = get_node_entry(env, op);
 913         ir_node            *in[2]    = { op_entry->low_word, op_entry->high_word };
 914         dbg_info           *dbgi     = get_irn_dbg_info(node);
 915         ir_node            *block    = get_nodes_block(node);
 916         ir_graph           *irg      = get_irn_irg(block);
 917         ir_type            *mtp      = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
 918         ir_op              *irop     = get_irn_op(node);
 919         ir_node            *addr     = get_intrinsic_address(mtp, irop, mode, mode, env);
 920         ir_node            *nomem    = get_irg_no_mem(irg);
 921         ir_node            *call     = new_rd_Call(dbgi, block, nomem, addr, 2, in, mtp);
 922         ir_node            *resproj  = new_r_Proj(call, mode_T, pn_Call_T_result);
 923         ir_node            *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 924         ir_node            *res_high = new_r_Proj(resproj, mode,              1);
 925         set_irn_pinned(call, get_irn_pinned(node));
 926         set_lowered(env, node, res_low, res_high);
 927 }
 928
 929 /**
 930  * Translate a logical binop.
 931  *
 932  * Create two logical binops.
 933  */
 934 static void lower_binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
 935                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) )
 936 {
 937         ir_node            *left        = get_binop_left(node);
 938         ir_node            *right       = get_binop_right(node);
 939         const node_entry_t *left_entry  = get_node_entry(env, left);
 940         const node_entry_t *right_entry = get_node_entry(env, right);
 941         dbg_info           *dbgi        = get_irn_dbg_info(node);
 942         ir_node            *block       = get_nodes_block(node);
 943         ir_node            *res_low
 944                 = constr_rd(dbgi, block, left_entry->low_word, right_entry->low_word,
 945                             env->low_unsigned);
 946         ir_node            *res_high
 947                 = constr_rd(dbgi, block, left_entry->high_word, right_entry->high_word,
 948                             mode);
 949         set_lowered(env, node, res_low, res_high);
 950 }
 951
 952 static void lower_And(ir_node *node, ir_mode *mode, lower_env_t *env)
 953 {
 954         lower_binop_logical(node, mode, env, new_rd_And);
 955 }
 956
 957 static void lower_Or(ir_node *node, ir_mode *mode, lower_env_t *env)
 958 {
 959         lower_binop_logical(node, mode, env, new_rd_Or);
 960 }
 961
 962 static void lower_Eor(ir_node *node, ir_mode *mode, lower_env_t *env)
 963 {
 964         lower_binop_logical(node, mode, env, new_rd_Eor);
 965 }
 966
 967 /**
 968  * Translate a Not.
 969  *
 970  * Create two logical Nots.
 971  */
 972 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env)
 973 {
 974         ir_node            *op       = get_Not_op(node);
 975         const node_entry_t *op_entry = get_node_entry(env, op);
 976         dbg_info           *dbgi     = get_irn_dbg_info(node);
 977         ir_node            *block    = get_nodes_block(node);
 978         ir_node            *res_low
 979                 = new_rd_Not(dbgi, block, op_entry->low_word, env->low_unsigned);
 980         ir_node            *res_high
 981                 = new_rd_Not(dbgi, block, op_entry->high_word, mode);
 982         set_lowered(env, node, res_low, res_high);
 983 }
 984
 985 static bool is_equality_cmp_0(const ir_node *node)
 986 {
 987         ir_relation relation = get_Cmp_relation(node);
 988         ir_node    *left     = get_Cmp_left(node);
 989         ir_node    *right    = get_Cmp_right(node);
 990         ir_mode    *mode     = get_irn_mode(left);
 991
 992         /* this probably makes no sense if unordered is involved */
 993         assert(!mode_is_float(mode));
 994
 995         if (!is_Const(right) || !is_Const_null(right))
 996                 return false;
 997         if (relation == ir_relation_equal)
 998                 return true;
 999         if (mode_is_signed(mode)) {
1000                 return relation == ir_relation_less_greater;
1001         } else {
1002                 return relation == ir_relation_greater;
1003         }
1004 }
1005
1006 /**
1007  * Translate a Cond.
1008  */
1009 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env)
1010 {
1011         ir_node *left, *right, *block;
1012         ir_node *sel = get_Cond_selector(node);
1013         ir_mode *m = get_irn_mode(sel);
1014         ir_mode *cmp_mode;
1015         const node_entry_t *lentry, *rentry;
1016         ir_node  *proj, *projT = NULL, *projF = NULL;
1017         ir_node  *new_bl, *irn;
1018         ir_node  *projHF, *projHT;
1019         ir_node  *dst_blk;
1020         ir_relation relation;
1021         ir_graph *irg;
1022         dbg_info *dbg;
1023
1024         (void) mode;
1025
1026         if (m != mode_b) {
1027                 if (m == env->high_signed || m == env->high_unsigned) {
1028                         /* bad we can't really handle Switch with 64bit offsets */
1029                         panic("Cond with 64bit jumptable not supported");
1030                 }
1031                 lower_node(env, sel);
1032                 return;
1033         }
1034
1035         if (!is_Cmp(sel)) {
1036                 lower_node(env, sel);
1037                 return;
1038         }
1039
1040         left     = get_Cmp_left(sel);
1041         cmp_mode = get_irn_mode(left);
1042         if (cmp_mode != env->high_signed && cmp_mode != env->high_unsigned) {
1043                 lower_node(env, sel);
1044                 return;
1045         }
1046
1047         right  = get_Cmp_right(sel);
1048         lower_node(env, left);
1049         lower_node(env, right);
1050         lentry = get_node_entry(env, left);
1051         rentry = get_node_entry(env, right);
1052
1053         /* all right, build the code */
1054         for (proj = (ir_node*)get_irn_link(node); proj;
1055              proj = (ir_node*)get_irn_link(proj)) {
1056                 long proj_nr = get_Proj_proj(proj);
1057
1058                 if (proj_nr == pn_Cond_true) {
1059                         assert(projT == NULL && "more than one Proj(true)");
1060                         projT = proj;
1061                 } else {
1062                         assert(proj_nr == pn_Cond_false);
1063                         assert(projF == NULL && "more than one Proj(false)");
1064                         projF = proj;
1065                 }
1066                 mark_irn_visited(proj);
1067         }
1068         assert(projT && projF);
1069
1070         /* create a new high compare */
1071         block    = get_nodes_block(node);
1072         irg      = get_Block_irg(block);
1073         dbg      = get_irn_dbg_info(sel);
1074         relation = get_Cmp_relation(sel);
1075
1076         if (is_equality_cmp_0(sel)) {
1077                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1078                 ir_mode *mode   = env->low_unsigned;
1079                 ir_node *low    = new_r_Conv(block, lentry->low_word, mode);
1080                 ir_node *high   = new_r_Conv(block, lentry->high_word, mode);
1081                 ir_node *ornode = new_rd_Or(dbg, block, low, high, mode);
1082                 ir_node *cmp    = new_rd_Cmp(dbg, block, ornode, new_r_Const_long(irg, mode, 0), relation);
1083                 set_Cond_selector(node, cmp);
1084                 return;
1085         }
1086
1087         if (relation == ir_relation_equal) {
1088                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1089                 pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1090
1091                 assert(entry);
1092                 dst_blk = (ir_node*)entry->value;
1093
1094                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1095                                  ir_relation_equal);
1096                 dbg = get_irn_dbg_info(node);
1097                 irn = new_rd_Cond(dbg, block, irn);
1098
1099                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1100                 mark_irn_visited(projHF);
1101                 exchange(projF, projHF);
1102
1103                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1104                 mark_irn_visited(projHT);
1105
1106                 new_bl = new_r_Block(irg, 1, &projHT);
1107
1108                 dbg = get_irn_dbg_info(sel);
1109                 irn = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word,
1110                                   ir_relation_equal);
1111                 dbg = get_irn_dbg_info(node);
1112                 irn = new_rd_Cond(dbg, new_bl, irn);
1113
1114                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1115                 mark_irn_visited(proj);
1116                 add_block_cf_input(dst_blk, projHF, proj);
1117
1118                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1119                 mark_irn_visited(proj);
1120                 exchange(projT, proj);
1121         } else if (relation == ir_relation_less_greater) {
1122                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1123                 pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1124
1125                 assert(entry);
1126                 dst_blk = (ir_node*)entry->value;
1127
1128                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1129                                  ir_relation_less_greater);
1130                 dbg = get_irn_dbg_info(node);
1131                 irn = new_rd_Cond(dbg, block, irn);
1132
1133                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1134                 mark_irn_visited(projHT);
1135                 exchange(projT, projHT);
1136
1137                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1138                 mark_irn_visited(projHF);
1139
1140                 new_bl = new_r_Block(irg, 1, &projHF);
1141
1142                 dbg = get_irn_dbg_info(sel);
1143                 irn = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word,
1144                                  ir_relation_less_greater);
1145                 dbg = get_irn_dbg_info(node);
1146                 irn = new_rd_Cond(dbg, new_bl, irn);
1147
1148                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1149                 mark_irn_visited(proj);
1150                 add_block_cf_input(dst_blk, projHT, proj);
1151
1152                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1153                 mark_irn_visited(proj);
1154                 exchange(projF, proj);
1155         } else {
1156                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1157                 ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1158                 pmap_entry *entry;
1159
1160                 entry = pmap_find(env->proj_2_block, projT);
1161                 assert(entry);
1162                 dstT = (ir_node*)entry->value;
1163
1164                 entry = pmap_find(env->proj_2_block, projF);
1165                 assert(entry);
1166                 dstF = (ir_node*)entry->value;
1167
1168                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1169                                  relation & ~ir_relation_equal);
1170                 dbg = get_irn_dbg_info(node);
1171                 irn = new_rd_Cond(dbg, block, irn);
1172
1173                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1174                 mark_irn_visited(projHT);
1175                 exchange(projT, projHT);
1176                 projT = projHT;
1177
1178                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1179                 mark_irn_visited(projHF);
1180
1181                 newbl_eq = new_r_Block(irg, 1, &projHF);
1182
1183                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1184                                  ir_relation_equal);
1185                 irn = new_rd_Cond(dbg, newbl_eq, irn);
1186
1187                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1188                 mark_irn_visited(proj);
1189                 exchange(projF, proj);
1190                 projF = proj;
1191
1192                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1193                 mark_irn_visited(proj);
1194
1195                 newbl_l = new_r_Block(irg, 1, &proj);
1196
1197                 dbg = get_irn_dbg_info(sel);
1198                 irn = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word,
1199                                  relation);
1200                 dbg = get_irn_dbg_info(node);
1201                 irn = new_rd_Cond(dbg, newbl_l, irn);
1202
1203                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1204                 mark_irn_visited(proj);
1205                 add_block_cf_input(dstT, projT, proj);
1206
1207                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1208                 mark_irn_visited(proj);
1209                 add_block_cf_input(dstF, projF, proj);
1210         }
1211
1212         /* we have changed the control flow */
1213         env->flags |= CF_CHANGED;
1214 }
1215
1216 /**
1217  * Translate a Conv to higher_signed
1218  */
1219 static void lower_Conv_to_Ll(ir_node *node, lower_env_t *env)
1220 {
1221         ir_mode  *omode        = get_irn_mode(node);
1222         ir_node  *op           = get_Conv_op(node);
1223         ir_mode  *imode        = get_irn_mode(op);
1224         ir_graph *irg          = get_irn_irg(node);
1225         ir_node  *block        = get_nodes_block(node);
1226         dbg_info *dbg          = get_irn_dbg_info(node);
1227         ir_node  *res_low;
1228         ir_node  *res_high;
1229
1230         ir_mode  *low_unsigned = env->low_unsigned;
1231         ir_mode  *low_signed
1232                 = mode_is_signed(omode) ? env->low_signed : low_unsigned;
1233
1234         if (mode_is_int(imode) || mode_is_reference(imode)) {
1235                 if (imode == env->high_signed || imode == env->high_unsigned) {
1236                         /* a Conv from Lu to Ls or Ls to Lu */
1237                         const node_entry_t *op_entry = get_node_entry(env, op);
1238                         res_low  = op_entry->low_word;
1239                         res_high = new_rd_Conv(dbg, block, op_entry->high_word, low_signed);
1240                 } else {
1241                         /* simple case: create a high word */
1242                         if (imode != low_unsigned)
1243                                 op = new_rd_Conv(dbg, block, op, low_unsigned);
1244
1245                         res_low = op;
1246
1247                         if (mode_is_signed(imode)) {
1248                                 int      c       = get_mode_size_bits(low_signed) - 1;
1249                                 ir_node *cnst    = new_r_Const_long(irg, low_unsigned, c);
1250                                 if (get_irn_mode(op) != low_signed)
1251                                         op = new_rd_Conv(dbg, block, op, low_signed);
1252                                 res_high = new_rd_Shrs(dbg, block, op, cnst, low_signed);
1253                         } else {
1254                                 res_high = new_r_Const(irg, get_mode_null(low_signed));
1255                         }
1256                 }
1257         } else if (imode == mode_b) {
1258                 res_low  = new_rd_Conv(dbg, block, op, low_unsigned);
1259                 res_high = new_r_Const(irg, get_mode_null(low_signed));
1260         } else {
1261                 ir_node *irn, *call;
1262                 ir_type *mtp = get_conv_type(imode, omode, env);
1263
1264                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1265                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1266                 set_irn_pinned(call, get_irn_pinned(node));
1267                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1268
1269                 res_low  = new_r_Proj(irn, low_unsigned, 0);
1270                 res_high = new_r_Proj(irn, low_signed, 1);
1271         }
1272         set_lowered(env, node, res_low, res_high);
1273 }
1274
1275 /**
1276  * Translate a Conv from higher_unsigned
1277  */
1278 static void lower_Conv_from_Ll(ir_node *node, lower_env_t *env)
1279 {
1280         ir_node            *op    = get_Conv_op(node);
1281         ir_mode            *omode = get_irn_mode(node);
1282         ir_node            *block = get_nodes_block(node);
1283         dbg_info           *dbg   = get_irn_dbg_info(node);
1284         ir_graph           *irg   = get_irn_irg(node);
1285         const node_entry_t *entry = get_node_entry(env, op);
1286
1287         if (mode_is_int(omode) || mode_is_reference(omode)) {
1288                 op = entry->low_word;
1289
1290                 /* simple case: create a high word */
1291                 if (omode != env->low_unsigned)
1292                         op = new_rd_Conv(dbg, block, op, omode);
1293
1294                 set_Conv_op(node, op);
1295         } else if (omode == mode_b) {
1296                 /* llu ? true : false  <=> (low|high) ? true : false */
1297                 ir_mode *mode   = env->low_unsigned;
1298                 ir_node *ornode = new_rd_Or(dbg, block, entry->low_word,
1299                                             entry->high_word, mode);
1300                 set_Conv_op(node, ornode);
1301         } else {
1302                 ir_node *irn, *call, *in[2];
1303                 ir_mode *imode = get_irn_mode(op);
1304                 ir_type *mtp   = get_conv_type(imode, omode, env);
1305
1306                 irn   = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1307                 in[0] = entry->low_word;
1308                 in[1] = entry->high_word;
1309
1310                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1311                 set_irn_pinned(call, get_irn_pinned(node));
1312                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1313
1314                 exchange(node, new_r_Proj(irn, omode, 0));
1315         }
1316 }
1317
1318 /**
1319  * lower Cmp
1320  */
1321 static void lower_Cmp(ir_node *cmp, ir_mode *m, lower_env_t *env)
1322 {
1323         ir_node  *l    = get_Cmp_left(cmp);
1324         ir_mode  *mode = get_irn_mode(l);
1325         ir_node  *r, *low, *high, *t, *res;
1326         ir_relation relation;
1327         ir_node  *block;
1328         dbg_info *dbg;
1329         const node_entry_t *lentry;
1330         const node_entry_t *rentry;
1331         (void) m;
1332
1333         if (mode != env->high_signed && mode != env->high_unsigned)
1334                 return;
1335
1336         r        = get_Cmp_right(cmp);
1337         lentry   = get_node_entry(env, l);
1338         rentry   = get_node_entry(env, r);
1339         relation = get_Cmp_relation(cmp);
1340         block    = get_nodes_block(cmp);
1341         dbg      = get_irn_dbg_info(cmp);
1342
1343         /* easy case for x ==/!= 0 (see lower_Cond for details) */
1344         if (is_equality_cmp_0(cmp)) {
1345                 ir_graph *irg     = get_irn_irg(cmp);
1346                 ir_mode  *mode    = env->low_unsigned;
1347                 ir_node  *low     = new_r_Conv(block, lentry->low_word, mode);
1348                 ir_node  *high    = new_r_Conv(block, lentry->high_word, mode);
1349                 ir_node  *ornode  = new_rd_Or(dbg, block, low, high, mode);
1350                 ir_node  *new_cmp = new_rd_Cmp(dbg, block, ornode, new_r_Const_long(irg, mode, 0), relation);
1351                 exchange(cmp, new_cmp);
1352                 return;
1353         }
1354
1355         if (relation == ir_relation_equal) {
1356                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1357                 low  = new_rd_Cmp(dbg, block, lentry->low_word, rentry->low_word,
1358                                   relation);
1359                 high = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1360                                   relation);
1361                 res  = new_rd_And(dbg, block, low, high, mode_b);
1362         } else if (relation == ir_relation_less_greater) {
1363                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1364                 low  = new_rd_Cmp(dbg, block, lentry->low_word, rentry->low_word,
1365                                   relation);
1366                 high = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1367                                   relation);
1368                 res = new_rd_Or(dbg, block, low, high, mode_b);
1369         } else {
1370                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1371                 ir_node *high1 = new_rd_Cmp(dbg, block, lentry->high_word,
1372                         rentry->high_word, relation & ~ir_relation_equal);
1373                 low  = new_rd_Cmp(dbg, block, lentry->low_word, rentry->low_word,
1374                                   relation);
1375                 high = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1376                                   ir_relation_equal);
1377                 t = new_rd_And(dbg, block, low, high, mode_b);
1378                 res = new_rd_Or(dbg, block, high1, t, mode_b);
1379         }
1380         exchange(cmp, res);
1381 }
1382
1383 /**
1384  * Translate a Conv.
1385  */
1386 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env)
1387 {
1388         mode = get_irn_mode(node);
1389
1390         if (mode == env->high_signed || mode == env->high_unsigned) {
1391                 lower_Conv_to_Ll(node, env);
1392         } else {
1393                 ir_mode *op_mode = get_irn_mode(get_Conv_op(node));
1394
1395                 if (op_mode == env->high_signed || op_mode == env->high_unsigned) {
1396                         lower_Conv_from_Ll(node, env);
1397                 }
1398         }
1399 }
1400
1401 /**
1402  * Remember the new argument index of this value type entity in the lowered
1403  * method type.
1404  *
1405  * @param ent  the entity
1406  * @param pos  the argument index of this entity
1407  */
1408 static inline void set_entity_arg_idx(ir_entity *ent, size_t pos)
1409 {
1410         set_entity_link(ent, INT_TO_PTR(pos));
1411 }
1412
1413 /**
1414  * Retrieve the argument index of a value type entity.
1415  *
1416  * @param ent  the entity
1417  */
1418 static size_t get_entity_arg_idx(const ir_entity *ent) {
1419         return PTR_TO_INT(get_entity_link(ent));
1420 }
1421
1422 /**
1423  * Lower the method type.
1424  *
1425  * @param env  the lower environment
1426  * @param mtp  the method type to lower
1427  *
1428  * @return the lowered type
1429  */
1430 static ir_type *lower_mtp(lower_env_t *env, ir_type *mtp)
1431 {
1432         pmap_entry *entry;
1433         ir_type    *res, *value_type;
1434
1435         if (is_lowered_type(mtp))
1436                 return mtp;
1437
1438         entry = pmap_find(lowered_type, mtp);
1439         if (! entry) {
1440                 size_t i, orig_n_params, orig_n_res, n_param, n_res;
1441
1442                 /* count new number of params */
1443                 n_param = orig_n_params = get_method_n_params(mtp);
1444                 for (i = orig_n_params; i > 0;) {
1445                         ir_type *tp = get_method_param_type(mtp, --i);
1446
1447                         if (is_Primitive_type(tp)) {
1448                                 ir_mode *mode = get_type_mode(tp);
1449
1450                                 if (mode == env->high_signed ||
1451                                         mode == env->high_unsigned)
1452                                         ++n_param;
1453                         }
1454                 }
1455
1456                 /* count new number of results */
1457                 n_res = orig_n_res = get_method_n_ress(mtp);
1458                 for (i = orig_n_res; i > 0;) {
1459                         ir_type *tp = get_method_res_type(mtp, --i);
1460
1461                         if (is_Primitive_type(tp)) {
1462                                 ir_mode *mode = get_type_mode(tp);
1463
1464                                 if (mode == env->high_signed ||
1465                                         mode == env->high_unsigned)
1466                                         ++n_res;
1467                         }
1468                 }
1469
1470                 res = new_type_method(n_param, n_res);
1471
1472                 /* set param types and result types */
1473                 for (i = n_param = 0; i < orig_n_params; ++i) {
1474                         ir_type *tp = get_method_param_type(mtp, i);
1475
1476                         if (is_Primitive_type(tp)) {
1477                                 ir_mode *mode = get_type_mode(tp);
1478
1479                                 if (mode == env->high_signed) {
1480                                         set_method_param_type(res, n_param++, tp_u);
1481                                         set_method_param_type(res, n_param++, tp_s);
1482                                 } else if (mode == env->high_unsigned) {
1483                                         set_method_param_type(res, n_param++, tp_u);
1484                                         set_method_param_type(res, n_param++, tp_u);
1485                                 } else {
1486                                         set_method_param_type(res, n_param++, tp);
1487                                 }
1488                         } else {
1489                                 set_method_param_type(res, n_param++, tp);
1490                         }
1491                 }
1492                 for (i = n_res = 0; i < orig_n_res; ++i) {
1493                         ir_type *tp = get_method_res_type(mtp, i);
1494
1495                         if (is_Primitive_type(tp)) {
1496                                 ir_mode *mode = get_type_mode(tp);
1497
1498                                 if (mode == env->high_signed) {
1499                                         set_method_res_type(res, n_res++, tp_u);
1500                                         set_method_res_type(res, n_res++, tp_s);
1501                                 } else if (mode == env->high_unsigned) {
1502                                         set_method_res_type(res, n_res++, tp_u);
1503                                         set_method_res_type(res, n_res++, tp_u);
1504                                 } else {
1505                                         set_method_res_type(res, n_res++, tp);
1506                                 }
1507                         } else {
1508                                 set_method_res_type(res, n_res++, tp);
1509                         }
1510                 }
1511                 set_lowered_type(mtp, res);
1512                 pmap_insert(lowered_type, mtp, res);
1513
1514                 value_type = get_method_value_param_type(mtp);
1515                 if (value_type != NULL) {
1516                         /* this creates a new value parameter type */
1517                         (void)get_method_value_param_ent(res, 0);
1518
1519                         /* set new param positions for all entities of the value type */
1520                         for (i = n_param = 0; i < orig_n_params; ++i) {
1521                                 ir_type   *tp  = get_method_param_type(mtp, i);
1522                                 ir_entity *ent = get_method_value_param_ent(mtp, i);
1523
1524                                 set_entity_arg_idx(ent, n_param);
1525                                 if (is_Primitive_type(tp)) {
1526                                         ir_mode *mode = get_type_mode(tp);
1527
1528                                         if (mode == env->high_signed || mode == env->high_unsigned) {
1529                                                 n_param += 2;
1530                                                 continue;
1531                                         }
1532                                 }
1533                                 ++n_param;
1534                         }
1535
1536                         set_lowered_type(value_type, get_method_value_param_type(res));
1537                 }
1538         } else {
1539                 res = (ir_type*)entry->value;
1540         }
1541         return res;
1542 }
1543
1544 /**
1545  * Translate a Return.
1546  */
1547 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env)
1548 {
1549         ir_graph  *irg = get_irn_irg(node);
1550         ir_entity *ent = get_irg_entity(irg);
1551         ir_type   *mtp = get_entity_type(ent);
1552         ir_node  **in;
1553         size_t     i, j, n;
1554         int        need_conv = 0;
1555         (void) mode;
1556
1557         /* check if this return must be lowered */
1558         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1559                 ir_node *pred = get_Return_res(node, i);
1560                 ir_mode *mode = get_irn_op_mode(pred);
1561
1562                 if (mode == env->high_signed || mode == env->high_unsigned)
1563                         need_conv = 1;
1564         }
1565         if (! need_conv)
1566                 return;
1567
1568         ent = get_irg_entity(irg);
1569         mtp = get_entity_type(ent);
1570
1571         mtp = lower_mtp(env, mtp);
1572         set_entity_type(ent, mtp);
1573
1574         /* create a new in array */
1575         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1576         in[0] = get_Return_mem(node);
1577
1578         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1579                 ir_node *pred      = get_Return_res(node, i);
1580                 ir_mode *pred_mode = get_irn_mode(pred);
1581
1582                 if (pred_mode == env->high_signed || pred_mode == env->high_unsigned) {
1583                         const node_entry_t *entry = get_node_entry(env, pred);
1584                         in[++j] = entry->low_word;
1585                         in[++j] = entry->high_word;
1586                 } else {
1587                         in[++j] = pred;
1588                 }
1589         }
1590
1591         set_irn_in(node, j+1, in);
1592 }
1593
1594 /**
1595  * Translate the parameters.
1596  */
1597 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env)
1598 {
1599         ir_graph  *irg = get_irn_irg(node);
1600         ir_entity *ent = get_irg_entity(irg);
1601         ir_type   *tp  = get_entity_type(ent);
1602         ir_type   *mtp;
1603         long      *new_projs;
1604         size_t    i, j, n_params;
1605         int       rem;
1606         ir_node   *proj, *args;
1607         (void) mode;
1608
1609         if (is_lowered_type(tp)) {
1610                 mtp = get_associated_type(tp);
1611         } else {
1612                 mtp = tp;
1613         }
1614         assert(! is_lowered_type(mtp));
1615
1616         n_params = get_method_n_params(mtp);
1617         if (n_params <= 0)
1618                 return;
1619
1620         NEW_ARR_A(long, new_projs, n_params);
1621
1622         /* first check if we have parameters that must be fixed */
1623         for (i = j = 0; i < n_params; ++i, ++j) {
1624                 ir_type *tp = get_method_param_type(mtp, i);
1625
1626                 new_projs[i] = j;
1627                 if (is_Primitive_type(tp)) {
1628                         ir_mode *mode = get_type_mode(tp);
1629
1630                         if (mode == env->high_signed ||
1631                                 mode == env->high_unsigned)
1632                                 ++j;
1633                 }
1634         }
1635         if (i == j)
1636                 return;
1637
1638         mtp = lower_mtp(env, mtp);
1639         set_entity_type(ent, mtp);
1640
1641         /* switch off optimization for new Proj nodes or they might be CSE'ed
1642            with not patched one's */
1643         rem = get_optimize();
1644         set_optimize(0);
1645
1646         /* ok, fix all Proj's and create new ones */
1647         args = get_irg_args(irg);
1648         for (proj = (ir_node*)get_irn_link(node); proj;
1649              proj = (ir_node*)get_irn_link(proj)) {
1650                 ir_node *pred = get_Proj_pred(proj);
1651                 long proj_nr;
1652                 ir_mode *mode;
1653                 ir_mode *mode_l;
1654                 ir_mode *mode_h;
1655                 ir_node *res_low;
1656                 ir_node *res_high;
1657                 dbg_info *dbg;
1658
1659                 /* do not visit this node again */
1660                 mark_irn_visited(proj);
1661
1662                 if (pred != args)
1663                         continue;
1664
1665                 proj_nr = get_Proj_proj(proj);
1666                 set_Proj_proj(proj, new_projs[proj_nr]);
1667
1668                 mode = get_irn_mode(proj);
1669                 mode_l = env->low_unsigned;
1670                 if (mode == env->high_signed) {
1671                         mode_h = env->low_signed;
1672                 } else if (mode == env->high_unsigned) {
1673                         mode_h = env->low_unsigned;
1674                 } else {
1675                         continue;
1676                 }
1677
1678                 dbg = get_irn_dbg_info(proj);
1679                 res_low  = new_rd_Proj(dbg, args, mode_l, new_projs[proj_nr]);
1680                 res_high = new_rd_Proj(dbg, args, mode_h, new_projs[proj_nr] + 1);
1681                 set_lowered(env, proj, res_low, res_high);
1682         }
1683         set_optimize(rem);
1684 }
1685
1686 /**
1687  * Translate a Call.
1688  */
1689 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env)
1690 {
1691         ir_type  *tp = get_Call_type(node);
1692         ir_type  *call_tp;
1693         ir_node  **in, *proj, *results;
1694         size_t   n_params, n_res;
1695         bool     need_lower = false;
1696         size_t   i, j;
1697         size_t   p;
1698         long     *res_numbers = NULL;
1699         (void) mode;
1700
1701         if (is_lowered_type(tp)) {
1702                 call_tp = get_associated_type(tp);
1703         } else {
1704                 call_tp = tp;
1705         }
1706
1707         assert(! is_lowered_type(call_tp));
1708
1709         n_params = get_method_n_params(call_tp);
1710         for (p = 0; p < n_params; ++p) {
1711                 ir_type *tp = get_method_param_type(call_tp, p);
1712
1713                 if (is_Primitive_type(tp)) {
1714                         ir_mode *mode = get_type_mode(tp);
1715
1716                         if (mode == env->high_signed || mode == env->high_unsigned) {
1717                                 need_lower = true;
1718                                 break;
1719                         }
1720                 }
1721         }
1722         n_res = get_method_n_ress(call_tp);
1723         if (n_res > 0) {
1724                 NEW_ARR_A(long, res_numbers, n_res);
1725
1726                 for (i = j = 0; i < n_res; ++i, ++j) {
1727                         ir_type *tp = get_method_res_type(call_tp, i);
1728
1729                         res_numbers[i] = j;
1730                         if (is_Primitive_type(tp)) {
1731                                 ir_mode *mode = get_type_mode(tp);
1732
1733                                 if (mode == env->high_signed || mode == env->high_unsigned) {
1734                                         need_lower = true;
1735                                         ++j;
1736                                 }
1737                         }
1738                 }
1739         }
1740
1741         if (! need_lower)
1742                 return;
1743
1744         /* let's lower it */
1745         call_tp = lower_mtp(env, call_tp);
1746         set_Call_type(node, call_tp);
1747
1748         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1749
1750         in[0] = get_Call_mem(node);
1751         in[1] = get_Call_ptr(node);
1752
1753         for (j = 2, i = 0; i < n_params; ++i) {
1754                 ir_node *pred      = get_Call_param(node, i);
1755                 ir_mode *pred_mode = get_irn_mode(pred);
1756
1757                 if (pred_mode == env->high_signed || pred_mode == env->high_unsigned) {
1758                         const node_entry_t *pred_entry = get_node_entry(env, pred);
1759                         in[j++] = pred_entry->low_word;
1760                         in[j++] = pred_entry->high_word;
1761                 } else {
1762                         in[j++] = pred;
1763                 }
1764         }
1765
1766         set_irn_in(node, j, in);
1767
1768         /* fix the results */
1769         results = NULL;
1770         for (proj = (ir_node*)get_irn_link(node); proj;
1771              proj = (ir_node*)get_irn_link(proj)) {
1772                 long proj_nr = get_Proj_proj(proj);
1773
1774                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
1775                         /* found the result proj */
1776                         results = proj;
1777                         break;
1778                 }
1779         }
1780
1781         if (results != NULL) {    /* there are results */
1782                 int rem = get_optimize();
1783
1784                 /* switch off optimization for new Proj nodes or they might be CSE'ed
1785                    with not patched one's */
1786                 set_optimize(0);
1787                 for (proj = (ir_node*)get_irn_link(results); proj; proj = (ir_node*)get_irn_link(proj)) {
1788                         if (get_Proj_pred(proj) == results) {
1789                                 long      proj_nr   = get_Proj_proj(proj);
1790                                 ir_mode  *proj_mode = get_irn_mode(proj);
1791                                 ir_mode  *mode_l;
1792                                 ir_mode  *mode_h;
1793                                 ir_node  *res_low;
1794                                 ir_node  *res_high;
1795                                 dbg_info *dbg;
1796
1797                                 /* found a result */
1798                                 mark_irn_visited(proj);
1799
1800                                 set_Proj_proj(proj, res_numbers[proj_nr]);
1801
1802                                 mode_l = env->low_unsigned;
1803                                 if (proj_mode == env->high_signed) {
1804                                         mode_h = env->low_signed;
1805                                 } else if (proj_mode == env->high_unsigned) {
1806                                         mode_h = env->low_unsigned;
1807                                 } else {
1808                                         continue;
1809                                 }
1810
1811                                 dbg      = get_irn_dbg_info(proj);
1812                                 res_low  = new_rd_Proj(dbg, results, mode_l, res_numbers[proj_nr]);
1813                                 res_high = new_rd_Proj(dbg, results, mode_h, res_numbers[proj_nr] + 1);
1814                                 set_lowered(env, proj, res_low, res_high);
1815                         }
1816                 }
1817                 set_optimize(rem);
1818         }
1819 }
1820
1821 /**
1822  * Translate an Unknown into two.
1823  */
1824 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env)
1825 {
1826         ir_mode  *low_mode = env->low_unsigned;
1827         ir_graph *irg      = get_irn_irg(node);
1828         ir_node  *res_low  = new_r_Unknown(irg, low_mode);
1829         ir_node  *res_high = new_r_Unknown(irg, mode);
1830         set_lowered(env, node, res_low, res_high);
1831 }
1832
1833 /**
1834  * Translate a Phi.
1835  *
1836  * First step: just create two templates
1837  */
1838 static void lower_Phi(lower_env_t *env, ir_node *phi)
1839 {
1840         ir_mode  *mode = get_irn_mode(phi);
1841         int       i;
1842         int       arity;
1843         ir_node **in_l;
1844         ir_node **in_h;
1845         ir_node  *unk_l;
1846         ir_node  *unk_h;
1847         ir_node  *phi_l;
1848         ir_node  *phi_h;
1849         dbg_info *dbg;
1850         ir_node  *block;
1851         ir_graph *irg;
1852         ir_mode  *mode_l;
1853         ir_mode  *mode_h;
1854
1855         /* enqueue predecessors */
1856         arity = get_Phi_n_preds(phi);
1857         for (i = 0; i < arity; ++i) {
1858                 ir_node *pred = get_Phi_pred(phi, i);
1859                 pdeq_putr(env->waitq, pred);
1860         }
1861
1862         if (mode != env->high_signed && mode != env->high_unsigned)
1863                 return;
1864
1865         /* first create a new in array */
1866         NEW_ARR_A(ir_node *, in_l, arity);
1867         NEW_ARR_A(ir_node *, in_h, arity);
1868         irg    = get_irn_irg(phi);
1869         mode_l = env->low_unsigned;
1870         mode_h = mode == env->high_signed ? env->low_signed : env->low_unsigned;
1871         unk_l  = new_r_Dummy(irg, mode_l);
1872         unk_h  = new_r_Dummy(irg, mode_h);
1873         for (i = 0; i < arity; ++i) {
1874                 in_l[i] = unk_l;
1875                 in_h[i] = unk_h;
1876         }
1877
1878         dbg   = get_irn_dbg_info(phi);
1879         block = get_nodes_block(phi);
1880         phi_l = new_rd_Phi(dbg, block, arity, in_l, mode_l);
1881         phi_h = new_rd_Phi(dbg, block, arity, in_h, mode_h);
1882
1883         set_lowered(env, phi, phi_l, phi_h);
1884
1885         /* remember that we need to fixup the predecessors later */
1886         ARR_APP1(ir_node*, env->lowered_phis, phi);
1887
1888         /* Don't forget to link the new Phi nodes into the block.
1889          * Beware that some Phis might be optimized away. */
1890         if (is_Phi(phi_l))
1891                 add_Block_phi(block, phi_l);
1892         if (is_Phi(phi_h))
1893                 add_Block_phi(block, phi_h);
1894 }
1895
1896 static void fixup_phi(lower_env_t *env, ir_node *phi)
1897 {
1898         const node_entry_t *entry = get_node_entry(env, phi);
1899         ir_node            *phi_l = entry->low_word;
1900         ir_node            *phi_h = entry->high_word;
1901         int                 arity = get_Phi_n_preds(phi);
1902         int                 i;
1903
1904         /* exchange phi predecessors which are lowered by now */
1905         for (i = 0; i < arity; ++i) {
1906                 ir_node            *pred       = get_Phi_pred(phi, i);
1907                 const node_entry_t *pred_entry = get_node_entry(env, pred);
1908
1909                 set_Phi_pred(phi_l, i, pred_entry->low_word);
1910                 set_Phi_pred(phi_h, i, pred_entry->high_word);
1911         }
1912 }
1913
1914 /**
1915  * Translate a Mux.
1916  */
1917 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env)
1918 {
1919         ir_node            *truen       = get_Mux_true(mux);
1920         ir_node            *falsen      = get_Mux_false(mux);
1921         ir_node            *sel         = get_Mux_sel(mux);
1922         const node_entry_t *true_entry  = get_node_entry(env, truen);
1923         const node_entry_t *false_entry = get_node_entry(env, falsen);
1924         ir_node            *true_l      = true_entry->low_word;
1925         ir_node            *true_h      = true_entry->high_word;
1926         ir_node            *false_l     = false_entry->low_word;
1927         ir_node            *false_h     = false_entry->high_word;
1928         dbg_info           *dbgi        = get_irn_dbg_info(mux);
1929         ir_node            *block       = get_nodes_block(mux);
1930         ir_node            *res_low
1931                 = new_rd_Mux(dbgi, block, sel, false_l, true_l, env->low_unsigned);
1932         ir_node            *res_high
1933                 = new_rd_Mux(dbgi, block, sel, false_h, true_h, mode);
1934         set_lowered(env, mux, res_low, res_high);
1935 }
1936
1937 /**
1938  * Translate an ASM node.
1939  */
1940 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env)
1941 {
1942         ir_mode           *high_signed        = env->high_signed;
1943         ir_mode           *high_unsigned      = env->high_unsigned;
1944         int                n_outs             = get_ASM_n_output_constraints(asmn);
1945         ir_asm_constraint *output_constraints = get_ASM_output_constraints(asmn);
1946         ir_asm_constraint *input_constraints  = get_ASM_input_constraints(asmn);
1947         unsigned           n_64bit_outs       = 0;
1948         int      i;
1949         ir_node *n;
1950
1951         (void)mode;
1952
1953         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
1954                 ir_node *op      = get_irn_n(asmn, i);
1955                 ir_mode *op_mode = get_irn_mode(op);
1956                 if (op_mode == high_signed || op_mode == high_unsigned) {
1957                         panic("lowering ASM 64bit input unimplemented");
1958                 }
1959         }
1960
1961         for (i = 0; i < n_outs; ++i) {
1962                 const ir_asm_constraint *constraint = &output_constraints[i];
1963                 if (constraint->mode == high_signed || constraint->mode == high_unsigned) {
1964                         const char *constr = get_id_str(constraint->constraint);
1965                         ++n_64bit_outs;
1966                         /* TODO: How to do this architecture neutral? This is very
1967                          * i386 specific... */
1968                         if (constr[0] != '=' || constr[1] != 'A') {
1969                                 panic("lowering ASM 64bit output only supports '=A' currently");
1970                         }
1971                 }
1972         }
1973
1974         if (n_64bit_outs == 0)
1975                 return;
1976
1977         {
1978                 dbg_info          *dbgi       = get_irn_dbg_info(asmn);
1979                 ir_node           *block      = get_nodes_block(asmn);
1980                 int                arity      = get_irn_arity(asmn);
1981                 ir_node          **in         = get_irn_in(asmn) + 1;
1982                 int                n_outs     = get_ASM_n_output_constraints(asmn);
1983                 int                new_n_outs = 0;
1984                 int                n_clobber  = get_ASM_n_clobbers(asmn);
1985                 long              *proj_map   = ALLOCAN(long, n_outs);
1986                 ident            **clobbers   = get_ASM_clobbers(asmn);
1987                 ident             *asm_text   = get_ASM_text(asmn);
1988                 ir_asm_constraint *new_outputs
1989                         = ALLOCAN(ir_asm_constraint, n_outs+n_64bit_outs);
1990                 ir_node           *new_asm;
1991
1992                 for (i = 0; i < n_outs; ++i) {
1993                         const ir_asm_constraint *constraint = &output_constraints[i];
1994                         if (constraint->mode == high_signed || constraint->mode == high_unsigned) {
1995                                 new_outputs[new_n_outs].pos        = constraint->pos;
1996                                 new_outputs[new_n_outs].constraint = new_id_from_str("=a");
1997                                 new_outputs[new_n_outs].mode       = env->low_unsigned;
1998                                 proj_map[i] = new_n_outs;
1999                                 ++new_n_outs;
2000                                 new_outputs[new_n_outs].pos        = constraint->pos;
2001                                 new_outputs[new_n_outs].constraint = new_id_from_str("=d");
2002                                 if (constraint->mode == high_signed)
2003                                         new_outputs[new_n_outs].mode = env->low_signed;
2004                                 else
2005                                         new_outputs[new_n_outs].mode = env->low_unsigned;
2006                                 ++new_n_outs;
2007                         } else {
2008                                 new_outputs[new_n_outs] = *constraint;
2009                                 proj_map[i] = new_n_outs;
2010                                 ++new_n_outs;
2011                         }
2012                 }
2013                 assert(new_n_outs == n_outs+(int)n_64bit_outs);
2014
2015                 new_asm = new_rd_ASM(dbgi, block, arity, in, input_constraints,
2016                                      new_n_outs, new_outputs, n_clobber, clobbers,
2017                                      asm_text);
2018
2019                 for (n = asmn;;) {
2020                         long pn;
2021                         ir_mode *proj_mode;
2022                         n = (ir_node*)get_irn_link(n);
2023                         if (n == NULL)
2024                                 break;
2025                         proj_mode = get_irn_mode(n);
2026                         pn = get_Proj_proj(n);
2027                         if (pn < n_outs)
2028                                 pn = proj_map[pn];
2029                         else
2030                                 pn = new_n_outs + pn - n_outs;
2031
2032                         if (proj_mode == high_signed || proj_mode == high_unsigned) {
2033                                 ir_mode *high_mode
2034                                         = proj_mode == high_signed ? env->low_signed : env->low_unsigned;
2035                                 ir_node *np_low  = new_r_Proj(new_asm, env->low_unsigned, pn);
2036                                 ir_node *np_high = new_r_Proj(new_asm, high_mode, pn+1);
2037                                 set_lowered(env, n, np_low, np_high);
2038                         } else {
2039                                 ir_node *np = new_r_Proj(new_asm, proj_mode, pn);
2040                                 exchange(n, np);
2041                         }
2042                 }
2043         }
2044 }
2045
2046 /**
2047  * Translate a Sel node.
2048  */
2049 static void lower_Sel(ir_node *sel, ir_mode *mode, lower_env_t *env)
2050 {
2051         (void) mode;
2052
2053         /* we must only lower value parameter Sels if we change the
2054            value parameter type. */
2055         if (env->value_param_tp != NULL) {
2056                 ir_entity *ent = get_Sel_entity(sel);
2057             if (get_entity_owner(ent) == env->value_param_tp) {
2058                         size_t pos = get_entity_arg_idx(ent);
2059
2060                         ent = get_method_value_param_ent(env->l_mtp, pos);
2061                         set_Sel_entity(sel, ent);
2062                 }
2063         }
2064 }
2065
2066 /**
2067  * check for opcodes that must always be lowered.
2068  */
2069 static bool always_lower(unsigned code)
2070 {
2071         switch (code) {
2072         case iro_ASM:
2073         case iro_Proj:
2074         case iro_Start:
2075         case iro_Call:
2076         case iro_Return:
2077         case iro_Cond:
2078         case iro_Conv:
2079         case iro_Sel:
2080                 return true;
2081         default:
2082                 return false;
2083         }
2084 }
2085
2086 /**
2087  * Compare two op_mode_entry_t's.
2088  */
2089 static int cmp_op_mode(const void *elt, const void *key, size_t size)
2090 {
2091         const op_mode_entry_t *e1 = (const op_mode_entry_t*)elt;
2092         const op_mode_entry_t *e2 = (const op_mode_entry_t*)key;
2093         (void) size;
2094
2095         return (e1->op != e2->op) | (e1->imode != e2->imode) | (e1->omode != e2->omode);
2096 }
2097
2098 /**
2099  * Compare two conv_tp_entry_t's.
2100  */
2101 static int cmp_conv_tp(const void *elt, const void *key, size_t size)
2102 {
2103         const conv_tp_entry_t *e1 = (const conv_tp_entry_t*)elt;
2104         const conv_tp_entry_t *e2 = (const conv_tp_entry_t*)key;
2105         (void) size;
2106
2107         return (e1->imode != e2->imode) | (e1->omode != e2->omode);
2108 }
2109
2110 /**
2111  * Enter a lowering function into an ir_op.
2112  */
2113 static void enter_lower_func(ir_op *op, lower_func func)
2114 {
2115         op->ops.generic = (op_func)func;
2116 }
2117
2118 /**
2119  * Returns non-zero if a method type must be lowered.
2120  *
2121  * @param mtp  the method type
2122  */
2123 static bool mtp_must_be_lowered(lower_env_t *env, ir_type *mtp)
2124 {
2125         size_t i, n_params = get_method_n_params(mtp);
2126
2127         /* first check if we have parameters that must be fixed */
2128         for (i = 0; i < n_params; ++i) {
2129                 ir_type *tp = get_method_param_type(mtp, i);
2130
2131                 if (is_Primitive_type(tp)) {
2132                         ir_mode *mode = get_type_mode(tp);
2133
2134                         if (mode == env->high_signed ||
2135                                 mode == env->high_unsigned)
2136                                 return true;
2137                 }
2138         }
2139         return false;
2140 }
2141
2142 /* Determine which modes need to be lowered */
2143 static void setup_modes(lower_env_t *env)
2144 {
2145         unsigned           size_bits           = env->params->doubleword_size;
2146         ir_mode           *doubleword_signed   = NULL;
2147         ir_mode           *doubleword_unsigned = NULL;
2148         size_t             n_modes             = get_irp_n_modes();
2149         ir_mode_arithmetic arithmetic;
2150         unsigned           modulo_shift;
2151         size_t             i;
2152
2153         /* search for doubleword modes... */
2154         for (i = 0; i < n_modes; ++i) {
2155                 ir_mode *mode = get_irp_mode(i);
2156                 if (!mode_is_int(mode))
2157                         continue;
2158                 if (get_mode_size_bits(mode) != size_bits)
2159                         continue;
2160                 if (mode_is_signed(mode)) {
2161                         if (doubleword_signed != NULL) {
2162                                 /* sigh - the lowerer should really just lower all mode with
2163                                  * size_bits it finds. Unfortunately this required a bigger
2164                                  * rewrite. */
2165                                 panic("multiple double word signed modes found");
2166                         }
2167                         doubleword_signed = mode;
2168                 } else {
2169                         if (doubleword_unsigned != NULL) {
2170                                 /* sigh - the lowerer should really just lower all mode with
2171                                  * size_bits it finds. Unfortunately this required a bigger
2172                                  * rewrite. */
2173                                 panic("multiple double word unsigned modes found");
2174                         }
2175                         doubleword_unsigned = mode;
2176                 }
2177         }
2178         if (doubleword_signed == NULL || doubleword_unsigned == NULL) {
2179                 panic("Couldn't find doubleword modes");
2180         }
2181
2182         arithmetic   = get_mode_arithmetic(doubleword_signed);
2183         modulo_shift = get_mode_modulo_shift(doubleword_signed);
2184
2185         assert(get_mode_size_bits(doubleword_unsigned) == size_bits);
2186         assert(size_bits % 2 == 0);
2187         assert(get_mode_sign(doubleword_signed) == 1);
2188         assert(get_mode_sign(doubleword_unsigned) == 0);
2189         assert(get_mode_sort(doubleword_signed) == irms_int_number);
2190         assert(get_mode_sort(doubleword_unsigned) == irms_int_number);
2191         assert(get_mode_arithmetic(doubleword_unsigned) == arithmetic);
2192         assert(get_mode_modulo_shift(doubleword_unsigned) == modulo_shift);
2193
2194         /* try to guess a sensible modulo shift for the new mode.
2195          * (This is IMO another indication that this should really be a node
2196          *  attribute instead of a mode thing) */
2197         if (modulo_shift == size_bits) {
2198                 modulo_shift = modulo_shift / 2;
2199         } else if (modulo_shift == 0) {
2200                 /* fine */
2201         } else {
2202                 panic("Don't know what new modulo shift to use for lowered doubleword mode");
2203         }
2204         size_bits /= 2;
2205
2206         /* produce lowered modes */
2207         env->high_signed   = doubleword_signed;
2208         env->high_unsigned = doubleword_unsigned;
2209         env->low_signed    = new_ir_mode("WS", irms_int_number, size_bits, 1,
2210                                          arithmetic, modulo_shift);
2211         env->low_unsigned  = new_ir_mode("WU", irms_int_number, size_bits, 0,
2212                                          arithmetic, modulo_shift);
2213 }
2214
2215 static void enqueue_preds(lower_env_t *env, ir_node *node)
2216 {
2217         int arity = get_irn_arity(node);
2218         int i;
2219
2220         for (i = 0; i < arity; ++i) {
2221                 ir_node *pred = get_irn_n(node, i);
2222                 pdeq_putr(env->waitq, pred);
2223         }
2224 }
2225
2226 static void lower_node(lower_env_t *env, ir_node *node)
2227 {
2228         int           arity;
2229         int           i;
2230         lower_func    func;
2231         ir_op        *op;
2232         ir_mode      *mode;
2233         unsigned      idx;
2234         node_entry_t *entry;
2235
2236         if (irn_visited(node))
2237                 return;
2238         mark_irn_visited(node);
2239
2240         /* cycles are always broken at Phi and Block nodes. So we don't need special
2241          * magic in all the other lower functions */
2242         if (is_Block(node)) {
2243                 enqueue_preds(env, node);
2244                 return;
2245         } else if (is_Phi(node)) {
2246                 lower_Phi(env, node);
2247                 return;
2248         }
2249
2250         /* depth-first: descend into operands */
2251         if (!is_Block(node)) {
2252                 ir_node *block = get_nodes_block(node);
2253                 lower_node(env, block);
2254         }
2255
2256         if (!is_Cond(node)) {
2257                 arity = get_irn_arity(node);
2258                 for (i = 0; i < arity; ++i) {
2259                         ir_node *pred = get_irn_n(node, i);
2260                         lower_node(env, pred);
2261                 }
2262         }
2263
2264         op   = get_irn_op(node);
2265         func = (lower_func) op->ops.generic;
2266         if (func == NULL)
2267                 return;
2268
2269         idx   = get_irn_idx(node);
2270         entry = idx < env->n_entries ? env->entries[idx] : NULL;
2271         if (entry != NULL || always_lower(get_irn_opcode(node))) {
2272                 mode = get_irn_op_mode(node);
2273                 if (mode == env->high_signed) {
2274                         mode = env->low_signed;
2275                 } else {
2276                         mode = env->low_unsigned;
2277                 }
2278                 DB((dbg, LEVEL_1, "  %+F\n", node));
2279                 func(node, mode, env);
2280         }
2281 }
2282
2283 static void lower_irg(lower_env_t *env, ir_graph *irg)
2284 {
2285         ir_entity *ent;
2286         ir_type   *mtp;
2287         unsigned   n_idx;
2288
2289         obstack_init(&env->obst);
2290
2291         n_idx = get_irg_last_idx(irg);
2292         n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2293         env->n_entries = n_idx;
2294         env->entries   = NEW_ARR_F(node_entry_t*, n_idx);
2295         memset(env->entries, 0, sizeof(env->entries[0]) * n_idx);
2296
2297         env->irg            = irg;
2298         env->l_mtp          = NULL;
2299         env->flags          = 0;
2300         env->proj_2_block   = pmap_create();
2301         env->value_param_tp = NULL;
2302
2303         ent = get_irg_entity(irg);
2304         mtp = get_entity_type(ent);
2305
2306         if (mtp_must_be_lowered(env, mtp)) {
2307                 ir_type *ltp = lower_mtp(env, mtp);
2308                 env->flags |= MUST_BE_LOWERED;
2309                 set_entity_type(ent, ltp);
2310                 env->l_mtp = ltp;
2311                 env->value_param_tp = get_method_value_param_type(mtp);
2312         }
2313
2314         /* first step: link all nodes and allocate data */
2315         ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2316         irg_walk_graph(irg, firm_clear_node_and_phi_links,
2317                        prepare_links_and_handle_rotl, env);
2318
2319         if (env->flags & MUST_BE_LOWERED) {
2320                 size_t i;
2321                 ir_reserve_resources(irg, IR_RESOURCE_IRN_VISITED);
2322                 inc_irg_visited(irg);
2323
2324                 assert(pdeq_empty(env->waitq));
2325                 pdeq_putr(env->waitq, get_irg_end(irg));
2326
2327                 env->lowered_phis = NEW_ARR_F(ir_node*, 0);
2328                 while (!pdeq_empty(env->waitq)) {
2329                         ir_node *node = (ir_node*)pdeq_getl(env->waitq);
2330                         lower_node(env, node);
2331                 }
2332
2333                 /* we need to fixup phis */
2334                 for (i = 0; i < ARR_LEN(env->lowered_phis); ++i) {
2335                         ir_node *phi = env->lowered_phis[i];
2336                         fixup_phi(env, phi);
2337                 }
2338                 DEL_ARR_F(env->lowered_phis);
2339
2340
2341                 ir_free_resources(irg, IR_RESOURCE_IRN_VISITED);
2342
2343                 /* outs are invalid, we changed the graph */
2344                 set_irg_outs_inconsistent(irg);
2345
2346                 if (env->flags & CF_CHANGED) {
2347                         /* control flow changed, dominance info is invalid */
2348                         set_irg_doms_inconsistent(irg);
2349                         set_irg_extblk_inconsistent(irg);
2350                         set_irg_loopinfo_inconsistent(irg);
2351                 }
2352         }
2353
2354         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2355
2356         pmap_destroy(env->proj_2_block);
2357         DEL_ARR_F(env->entries);
2358         obstack_free(&env->obst, NULL);
2359 }
2360
2361 /*
2362  * Do the lowering.
2363  */
2364 void lower_dw_ops(const lwrdw_param_t *param)
2365 {
2366         lower_env_t lenv;
2367         size_t      i, n;
2368
2369         assert(param != NULL);
2370         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2371
2372         memset(&lenv, 0, sizeof(lenv));
2373         lenv.params = param;
2374         setup_modes(&lenv);
2375
2376         /* create the necessary maps */
2377         if (! intrinsic_fkt)
2378                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2379         if (! conv_types)
2380                 conv_types = new_set(cmp_conv_tp, 16);
2381         if (! lowered_type)
2382                 lowered_type = pmap_create();
2383
2384         /* create a primitive unsigned and signed type */
2385         if (! tp_u)
2386                 tp_u = get_type_for_mode(lenv.low_unsigned);
2387         if (! tp_s)
2388                 tp_s = get_type_for_mode(lenv.low_signed);
2389
2390         /* create method types for the created binop calls */
2391         if (! binop_tp_u) {
2392                 binop_tp_u = new_type_method(4, 2);
2393                 set_method_param_type(binop_tp_u, 0, tp_u);
2394                 set_method_param_type(binop_tp_u, 1, tp_u);
2395                 set_method_param_type(binop_tp_u, 2, tp_u);
2396                 set_method_param_type(binop_tp_u, 3, tp_u);
2397                 set_method_res_type(binop_tp_u, 0, tp_u);
2398                 set_method_res_type(binop_tp_u, 1, tp_u);
2399         }
2400         if (! binop_tp_s) {
2401                 binop_tp_s = new_type_method(4, 2);
2402                 set_method_param_type(binop_tp_s, 0, tp_u);
2403                 set_method_param_type(binop_tp_s, 1, tp_s);
2404                 set_method_param_type(binop_tp_s, 2, tp_u);
2405                 set_method_param_type(binop_tp_s, 3, tp_s);
2406                 set_method_res_type(binop_tp_s, 0, tp_u);
2407                 set_method_res_type(binop_tp_s, 1, tp_s);
2408         }
2409         if (! shiftop_tp_u) {
2410                 shiftop_tp_u = new_type_method(3, 2);
2411                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2412                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2413                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2414                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2415                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2416         }
2417         if (! shiftop_tp_s) {
2418                 shiftop_tp_s = new_type_method(3, 2);
2419                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2420                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2421                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2422                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2423                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2424         }
2425         if (! unop_tp_u) {
2426                 unop_tp_u = new_type_method(2, 2);
2427                 set_method_param_type(unop_tp_u, 0, tp_u);
2428                 set_method_param_type(unop_tp_u, 1, tp_u);
2429                 set_method_res_type(unop_tp_u, 0, tp_u);
2430                 set_method_res_type(unop_tp_u, 1, tp_u);
2431         }
2432         if (! unop_tp_s) {
2433                 unop_tp_s = new_type_method(2, 2);
2434                 set_method_param_type(unop_tp_s, 0, tp_u);
2435                 set_method_param_type(unop_tp_s, 1, tp_s);
2436                 set_method_res_type(unop_tp_s, 0, tp_u);
2437                 set_method_res_type(unop_tp_s, 1, tp_s);
2438         }
2439
2440         clear_irp_opcodes_generic_func();
2441         enter_lower_func(op_ASM,     lower_ASM);
2442         enter_lower_func(op_Add,     lower_binop);
2443         enter_lower_func(op_And,     lower_And);
2444         enter_lower_func(op_Call,    lower_Call);
2445         enter_lower_func(op_Cmp,     lower_Cmp);
2446         enter_lower_func(op_Cond,    lower_Cond);
2447         enter_lower_func(op_Const,   lower_Const);
2448         enter_lower_func(op_Conv,    lower_Conv);
2449         enter_lower_func(op_Div,     lower_Div);
2450         enter_lower_func(op_Eor,     lower_Eor);
2451         enter_lower_func(op_Load,    lower_Load);
2452         enter_lower_func(op_Minus,   lower_Unop);
2453         enter_lower_func(op_Mod,     lower_Mod);
2454         enter_lower_func(op_Mul,     lower_binop);
2455         enter_lower_func(op_Mux,     lower_Mux);
2456         enter_lower_func(op_Not,     lower_Not);
2457         enter_lower_func(op_Or,      lower_Or);
2458         enter_lower_func(op_Return,  lower_Return);
2459         enter_lower_func(op_Sel,     lower_Sel);
2460         enter_lower_func(op_Shl,     lower_Shl);
2461         enter_lower_func(op_Shr,     lower_Shr);
2462         enter_lower_func(op_Shrs,    lower_Shrs);
2463         enter_lower_func(op_Start,   lower_Start);
2464         enter_lower_func(op_Store,   lower_Store);
2465         enter_lower_func(op_Sub,     lower_binop);
2466         enter_lower_func(op_Unknown, lower_Unknown);
2467
2468         lenv.tv_mode_bytes = new_tarval_from_long(param->doubleword_size/(2*8), lenv.low_unsigned);
2469         lenv.tv_mode_bits  = new_tarval_from_long(param->doubleword_size/2, lenv.low_unsigned);
2470         lenv.waitq         = new_pdeq();
2471         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
2472         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
2473
2474         /* transform all graphs */
2475         for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
2476                 ir_graph *irg = get_irp_irg(i);
2477                 lower_irg(&lenv, irg);
2478         }
2479         del_pdeq(lenv.waitq);
2480 }
2481
2482 /* Default implementation. */
2483 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2484                                     const ir_mode *imode, const ir_mode *omode,
2485                                     void *context)
2486 {
2487         char buf[64];
2488         ident *id;
2489         ir_entity *ent;
2490         (void) context;
2491
2492         if (imode == omode) {
2493                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2494         } else {
2495                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2496                         get_mode_name(imode), get_mode_name(omode));
2497         }
2498         id = new_id_from_str(buf);
2499
2500         ent = new_entity(get_glob_type(), id, method);
2501         set_entity_ld_ident(ent, get_entity_ident(ent));
2502         return ent;
2503 }