nsz Git - libfirm/blob - ir/lower/lower_dw.c

   1 /*
   2  * Project:     libFIRM
   3  * File name:   ir/lower/lower_dw.c
   4  * Purpose:     Lower Double word operations, ie Mode L -> I.
   5  * Author:      Michael Beck
   6  * Created:             8.10.2004
   7  * CVS-ID:      $Id$
   8  * Copyright:   (c) 1998-2006 Universität Karlsruhe
   9  * Licence:     This file protected by GPL -  GNU GENERAL PUBLIC LICENSE.
  10  */
  11 #ifdef HAVE_CONFIG_H
  12 # include "config.h"
  13 #endif
  14
  15 #ifdef HAVE_MALLOC_H
  16 # include <malloc.h>
  17 #endif
  18 #ifdef HAVE_ALLOCA_H
  19 # include <alloca.h>
  20 #endif
  21 #ifdef HAVE_STRING_H
  22 # include <string.h>
  23 #endif
  24 #ifdef HAVE_STDLIB_H
  25 # include <stdlib.h>
  26 #endif
  27
  28 #include <assert.h>
  29
  30 #include "irnode_t.h"
  31 #include "irgraph_t.h"
  32 #include "irmode_t.h"
  33 #include "iropt_t.h"
  34 #include "irgmod.h"
  35 #include "tv_t.h"
  36 #include "dbginfo_t.h"
  37 #include "iropt_dbg.h"
  38 #include "irflag_t.h"
  39 #include "firmstat.h"
  40 #include "irgwalk.h"
  41 #include "ircons.h"
  42 #include "lower_dw.h"
  43 #include "irflag.h"
  44 #include "irtools.h"
  45 #include "debug.h"
  46 #include "set.h"
  47 #include "pmap.h"
  48 #include "pdeq.h"
  49 #include "irdump.h"
  50
  51 /** A map from mode to a primitive type. */
  52 static pmap *prim_types;
  53
  54 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  55 static set *intrinsic_fkt;
  56
  57 /** A map from (imode, omode) to conv function types. */
  58 static set *conv_types;
  59
  60 /** A map from a method type to its lowered type. */
  61 static pmap *lowered_type;
  62
  63 /** The types for the binop and unop intrinsics. */
  64 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;
  65
  66 /** the debug handle */
  67 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  68
  69 /**
  70  * An entry in the (op, imode, omode) -> entity map.
  71  */
  72 typedef struct _op_mode_entry {
  73         const ir_op   *op;    /**< the op */
  74         const ir_mode *imode; /**< the input mode */
  75         const ir_mode *omode; /**< the output mode */
  76         entity        *ent;   /**< the associated entity of this (op, imode, omode) triple */
  77 } op_mode_entry_t;
  78
  79 /**
  80  * An entry in the (imode, omode) -> tp map.
  81  */
  82 typedef struct _conv_tp_entry {
  83         const ir_mode *imode; /**< the input mode */
  84         const ir_mode *omode; /**< the output mode */
  85         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
  86 } conv_tp_entry_t;
  87
  88 /**
  89  * Every double word node will be replaced,
  90  * we need some store to hold the replacement:
  91  */
  92 typedef struct _node_entry_t {
  93         ir_node *low_word;        /**< the low word */
  94         ir_node *high_word;       /**< the high word */
  95 } node_entry_t;
  96
  97 enum lower_flags {
  98         MUST_BE_LOWERED = 1,   /**< graph must be lowered */
  99         CF_CHANGED      = 2,   /**< control flow was changed */
 100 };
 101
 102 /**
 103  * The lower environment.
 104  */
 105 typedef struct _lower_env_t {
 106         node_entry_t **entries;       /**< entries per node */
 107         struct obstack obst;          /**< an obstack holding the temporary data */
 108         tarval   *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 109         tarval   *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 110         pdeq     *waitq;              /**< a wait queue of all nodes that must be handled later */
 111         pmap     *proj_2_block;       /**< a map from ProjX to its destination blocks */
 112         const lwrdw_param_t *params;  /**< transformation parameter */
 113         unsigned flags;               /**< some flags */
 114         int      n_entries;           /**< number of entries */
 115 } lower_env_t;
 116
 117 /**
 118  * Get a primitive mode for a mode.
 119  */
 120 static ir_type *get_primitive_type(ir_mode *mode) {
 121         pmap_entry *entry = pmap_find(prim_types, mode);
 122         ir_type *tp;
 123         char buf[64];
 124
 125         if (entry)
 126                 return entry->value;
 127
 128         snprintf(buf, sizeof(buf), "_prim_%s", get_mode_name(mode));
 129         tp = new_type_primitive(new_id_from_str(buf), mode);
 130
 131         pmap_insert(prim_types, mode, tp);
 132         return tp;
 133 }  /* get_primitive_type */
 134
 135 /**
 136  * Create a method type for a Conv emulation from imode to omode.
 137  */
 138 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env) {
 139         conv_tp_entry_t key, *entry;
 140         ir_type *mtd;
 141
 142         key.imode = imode;
 143         key.omode = omode;
 144         key.mtd   = NULL;
 145
 146         entry = set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 147         if (! entry->mtd) {
 148                 int n_param = 1, n_res = 1;
 149                 char buf[64];
 150
 151                 if (imode == env->params->high_signed || imode == env->params->high_unsigned)
 152                         n_param = 2;
 153                 if (omode == env->params->high_signed || omode == env->params->high_unsigned)
 154                         n_res = 2;
 155
 156                 /* create a new one */
 157                 snprintf(buf, sizeof(buf), "LConv%s%s", get_mode_name(imode), get_mode_name(omode));
 158                 mtd = new_type_method(new_id_from_str(buf), n_param, n_res);
 159
 160                 /* set param types and result types */
 161                 n_param = 0;
 162                 if (imode == env->params->high_signed) {
 163                         set_method_param_type(mtd, n_param++, tp_s);
 164                         set_method_param_type(mtd, n_param++, tp_s);
 165                 } else if (imode == env->params->high_unsigned) {
 166                         set_method_param_type(mtd, n_param++, tp_u);
 167                         set_method_param_type(mtd, n_param++, tp_u);
 168                 } else {
 169                         ir_type *tp = get_primitive_type(imode);
 170                         set_method_param_type(mtd, n_param++, tp);
 171                 }  /* if */
 172
 173                 n_res = 0;
 174                 if (omode == env->params->high_signed) {
 175                         set_method_res_type(mtd, n_res++, tp_s);
 176                         set_method_res_type(mtd, n_res++, tp_s);
 177                 } else if (omode == env->params->high_unsigned) {
 178                         set_method_res_type(mtd, n_res++, tp_u);
 179                         set_method_res_type(mtd, n_res++, tp_u);
 180                 } else {
 181                         ir_type *tp = get_primitive_type(omode);
 182                         set_method_res_type(mtd, n_res++, tp);
 183                 }  /* if */
 184                 entry->mtd = mtd;
 185         } else {
 186                 mtd = entry->mtd;
 187         }  /* if */
 188         return mtd;
 189 }  /* get_conv_type */
 190
 191 /**
 192  * Add an additional control flow input to a block.
 193  * Patch all Phi nodes. The new Phi inputs are copied from
 194  * old input number nr.
 195  */
 196 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 197 {
 198         int i, arity = get_irn_arity(block);
 199         ir_node **in, *phi;
 200
 201         assert(nr < arity);
 202
 203         NEW_ARR_A(ir_node *, in, arity + 1);
 204         for (i = 0; i < arity; ++i)
 205                 in[i] = get_irn_n(block, i);
 206         in[i] = cf;
 207
 208         set_irn_in(block, i + 1, in);
 209
 210         for (phi = get_irn_link(block); phi; phi = get_irn_link(phi)) {
 211                 for (i = 0; i < arity; ++i)
 212                         in[i] = get_irn_n(phi, i);
 213                 in[i] = in[nr];
 214                 set_irn_in(phi, i + 1, in);
 215         }  /* for */
 216 }  /* add_block_cf_input_nr */
 217
 218 /**
 219  * Add an additional control flow input to a block.
 220  * Patch all Phi nodes. The new Phi inputs are copied from
 221  * old input from cf tmpl.
 222  */
 223 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 224 {
 225         int i, arity = get_irn_arity(block);
 226         int nr = 0;
 227
 228         for (i = 0; i < arity; ++i) {
 229                 if (get_irn_n(block, i) == tmpl) {
 230                         nr = i;
 231                         break;
 232                 }  /* if */
 233         }  /* for */
 234         assert(i < arity);
 235         add_block_cf_input_nr(block, nr, cf);
 236 }  /* add_block_cf_input */
 237
 238 /**
 239  * Return the "operational" mode of a Firm node.
 240  */
 241 static ir_mode *get_irn_op_mode(ir_node *node)
 242 {
 243         switch (get_irn_opcode(node)) {
 244         case iro_Load:
 245                 return get_Load_mode(node);
 246         case iro_Store:
 247                 return get_irn_mode(get_Store_value(node));
 248         case iro_DivMod:
 249                 return get_irn_mode(get_DivMod_left(node));
 250         case iro_Div:
 251                 return get_irn_mode(get_Div_left(node));
 252         case iro_Mod:
 253                 return get_irn_mode(get_Mod_left(node));
 254         case iro_Cmp:
 255                 return get_irn_mode(get_Cmp_left(node));
 256         default:
 257                 return get_irn_mode(node);
 258         }  /* switch */
 259 }  /* get_irn_op_mode */
 260
 261 /**
 262  * Walker, prepare the node links.
 263  */
 264 static void prepare_links(ir_node *node, void *env)
 265 {
 266         lower_env_t  *lenv = env;
 267         ir_mode      *mode = get_irn_op_mode(node);
 268         node_entry_t *link;
 269         int          i;
 270
 271         if (mode == lenv->params->high_signed ||
 272                 mode == lenv->params->high_unsigned) {
 273                 /* ok, found a node that will be lowered */
 274                 link = obstack_alloc(&lenv->obst, sizeof(*link));
 275
 276                 memset(link, 0, sizeof(*link));
 277
 278                 lenv->entries[get_irn_idx(node)] = link;
 279                 lenv->flags |= MUST_BE_LOWERED;
 280         } else if (get_irn_op(node) == op_Conv) {
 281                 /* Conv nodes have two modes */
 282                 ir_node *pred = get_Conv_op(node);
 283                 mode = get_irn_mode(pred);
 284
 285                 if (mode == lenv->params->high_signed ||
 286                         mode == lenv->params->high_unsigned) {
 287                         /* must lower this node either */
 288                         link = obstack_alloc(&lenv->obst, sizeof(*link));
 289
 290                         memset(link, 0, sizeof(*link));
 291
 292                         lenv->entries[get_irn_idx(node)] = link;
 293                         lenv->flags |= MUST_BE_LOWERED;
 294                 }  /* if */
 295                 return;
 296         }  /* if */
 297
 298         if (is_Proj(node)) {
 299                 /* link all Proj nodes to its predecessor:
 300                    Note that Tuple Proj's and its Projs are linked either. */
 301                 ir_node *pred = get_Proj_pred(node);
 302
 303                 set_irn_link(node, get_irn_link(pred));
 304                 set_irn_link(pred, node);
 305         } else if (is_Phi(node)) {
 306                 /* link all Phi nodes to its block */
 307                 ir_node *block = get_nodes_block(node);
 308
 309                 set_irn_link(node, get_irn_link(block));
 310                 set_irn_link(block, node);
 311         } else if (is_Block(node)) {
 312                 /* fill the Proj -> Block map */
 313                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 314                         ir_node *pred = get_Block_cfgpred(node, i);
 315
 316                         if (is_Proj(pred))
 317                                 pmap_insert(lenv->proj_2_block, pred, node);
 318                 }  /* for */
 319         }  /* if */
 320 }  /* prepare_links */
 321
 322 /**
 323  * Translate a Constant: create two.
 324  */
 325 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env) {
 326         tarval   *tv, *tv_l, *tv_h;
 327         ir_node  *low, *high;
 328         dbg_info *dbg = get_irn_dbg_info(node);
 329         ir_node  *block = get_nodes_block(node);
 330         int      idx;
 331         ir_graph *irg = current_ir_graph;
 332
 333         tv   = get_Const_tarval(node);
 334
 335         tv_l = tarval_convert_to(tv, mode);
 336         low  = new_rd_Const(dbg, irg, block, mode, tv_l);
 337
 338         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 339         high = new_rd_Const(dbg, irg, block, mode, tv_h);
 340
 341         idx = get_irn_idx(node);
 342         assert(idx < env->n_entries);
 343         env->entries[idx]->low_word  = low;
 344         env->entries[idx]->high_word = high;
 345 }  /* lower_Const */
 346
 347 /**
 348  * Translate a Load: create two.
 349  */
 350 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env) {
 351         ir_graph *irg = current_ir_graph;
 352         ir_node  *adr = get_Load_ptr(node);
 353         ir_node  *mem = get_Load_mem(node);
 354         ir_node  *low, *high, *proj;
 355         dbg_info *dbg;
 356         ir_node  *block = get_nodes_block(node);
 357         int      idx;
 358
 359         if (env->params->little_endian) {
 360                 low  = adr;
 361                 high = new_r_Add(irg, block, adr,
 362                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 363                         get_irn_mode(adr));
 364         } else {
 365                 low  = new_r_Add(irg, block, adr,
 366                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 367                         get_irn_mode(adr));
 368                 high = adr;
 369         }  /* if */
 370
 371         /* create two loads */
 372         dbg  = get_irn_dbg_info(node);
 373         low  = new_rd_Load(dbg, irg, block, mem, low,  mode);
 374         proj = new_r_Proj(irg, block, low, mode_M, pn_Load_M);
 375         high = new_rd_Load(dbg, irg, block, proj, high, mode);
 376
 377         set_Load_volatility(low,  get_Load_volatility(node));
 378         set_Load_volatility(high, get_Load_volatility(node));
 379
 380         idx = get_irn_idx(node);
 381         assert(idx < env->n_entries);
 382         env->entries[idx]->low_word  = low;
 383         env->entries[idx]->high_word = high;
 384
 385         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 386                 idx = get_irn_idx(proj);
 387
 388                 switch (get_Proj_proj(proj)) {
 389                 case pn_Load_M:         /* Memory result. */
 390                         /* put it to the second one */
 391                         set_Proj_pred(proj, high);
 392                         break;
 393                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 394                         /* put it to the first one */
 395                         set_Proj_pred(proj, low);
 396                         break;
 397                 case pn_Load_res:       /* Result of load operation. */
 398                         assert(idx < env->n_entries);
 399                         env->entries[idx]->low_word  = new_r_Proj(irg, block, low, mode, pn_Load_res);
 400                         env->entries[idx]->high_word = new_r_Proj(irg, block, high, mode, pn_Load_res);
 401                         break;
 402                 default:
 403                         assert(0 && "unexpected Proj number");
 404                 }  /* switch */
 405                 /* mark this proj: we have handled it already, otherwise we might fall into
 406                  * out new nodes. */
 407                 mark_irn_visited(proj);
 408         }  /* for */
 409 }  /* lower_Load */
 410
 411 /**
 412  * Translate a Store: create two.
 413  */
 414 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env) {
 415         ir_graph *irg;
 416         ir_node  *block, *adr, *mem;
 417         ir_node  *low, *high, *irn, *proj;
 418         dbg_info *dbg;
 419         int      idx;
 420         node_entry_t *entry;
 421
 422         irn = get_Store_value(node);
 423         entry = env->entries[get_irn_idx(irn)];
 424         assert(entry);
 425
 426         if (! entry->low_word) {
 427                 /* not ready yet, wait */
 428                 pdeq_putr(env->waitq, node);
 429                 return;
 430         }  /* if */
 431
 432         irg = current_ir_graph;
 433         adr = get_Store_ptr(node);
 434         mem = get_Store_mem(node);
 435         block = get_nodes_block(node);
 436
 437         if (env->params->little_endian) {
 438                 low  = adr;
 439                 high = new_r_Add(irg, block, adr,
 440                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 441                         get_irn_mode(adr));
 442         } else {
 443                 low  = new_r_Add(irg, block, adr,
 444                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 445                         get_irn_mode(adr));
 446                 high = adr;
 447         }  /* if */
 448
 449         /* create two Stores */
 450         dbg = get_irn_dbg_info(node);
 451         low  = new_rd_Store(dbg, irg, block, mem, low,  entry->low_word);
 452         proj = new_r_Proj(irg, block, low, mode_M, pn_Store_M);
 453         high = new_rd_Store(dbg, irg, block, proj, high, entry->high_word);
 454
 455         set_Store_volatility(low,  get_Store_volatility(node));
 456         set_Store_volatility(high, get_Store_volatility(node));
 457
 458         idx = get_irn_idx(node);
 459         assert(idx < env->n_entries);
 460         env->entries[idx]->low_word  = low;
 461         env->entries[idx]->high_word = high;
 462
 463         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 464                 idx = get_irn_idx(proj);
 465
 466                 switch (get_Proj_proj(proj)) {
 467                 case pn_Store_M:         /* Memory result. */
 468                         /* put it to the second one */
 469                         set_Proj_pred(proj, high);
 470                         break;
 471                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 472                         /* put it to the first one */
 473                         set_Proj_pred(proj, low);
 474                         break;
 475                 default:
 476                         assert(0 && "unexpected Proj number");
 477                 }  /* switch */
 478                 /* mark this proj: we have handled it already, otherwise we might fall into
 479                  * out new nodes. */
 480                 mark_irn_visited(proj);
 481         }  /* for */
 482 }  /* lower_Store */
 483
 484 /**
 485  * Return a node containing the address of the intrinsic emulation function.
 486  *
 487  * @param method  the method type of the emulation function
 488  * @param op      the emulated ir_op
 489  * @param imode   the input mode of the emulated opcode
 490  * @param omode   the output mode of the emulated opcode
 491  * @param block   where the new mode is created
 492  * @param env     the lower environment
 493  */
 494 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 495                                       ir_mode *imode, ir_mode *omode,
 496                                       ir_node *block, lower_env_t *env) {
 497         symconst_symbol sym;
 498         entity *ent;
 499         op_mode_entry_t key, *entry;
 500
 501         key.op    = op;
 502         key.imode = imode;
 503         key.omode = omode;
 504         key.ent   = NULL;
 505
 506         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 507                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 508         if (! entry->ent) {
 509                 /* create a new one */
 510                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 511
 512                 assert(ent && "Intrinsic creator must return an entity");
 513                 entry->ent = ent;
 514         } else {
 515                 ent = entry->ent;
 516         }  /* if */
 517         sym.entity_p = ent;
 518         return new_r_SymConst(current_ir_graph, block, sym, symconst_addr_ent);
 519 }  /* get_intrinsic_address */
 520
 521 /**
 522  * Translate a Div.
 523  *
 524  * Create an intrinsic Call.
 525  */
 526 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env) {
 527         ir_node  *block, *irn, *call, *proj;
 528         ir_node  *in[4];
 529         ir_mode  *opmode;
 530         dbg_info *dbg;
 531         ir_type  *mtp;
 532         int      idx;
 533         ir_graph *irg;
 534         node_entry_t *entry;
 535
 536         irn   = get_Div_left(node);
 537         entry = env->entries[get_irn_idx(irn)];
 538         assert(entry);
 539
 540         if (! entry->low_word) {
 541                 /* not ready yet, wait */
 542                 pdeq_putr(env->waitq, node);
 543                 return;
 544         }  /* if */
 545
 546         in[0] = entry->low_word;
 547         in[1] = entry->high_word;
 548
 549         irn   = get_Div_right(node);
 550         entry = env->entries[get_irn_idx(irn)];
 551         assert(entry);
 552
 553         if (! entry->low_word) {
 554                 /* not ready yet, wait */
 555                 pdeq_putr(env->waitq, node);
 556                 return;
 557         }  /* if */
 558
 559         in[2] = entry->low_word;
 560         in[3] = entry->high_word;
 561
 562         dbg   = get_irn_dbg_info(node);
 563         block = get_nodes_block(node);
 564         irg   = current_ir_graph;
 565
 566         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 567         opmode = get_irn_op_mode(node);
 568         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, block, env);
 569         call = new_rd_Call(dbg, irg, block, get_Div_mem(node),
 570                 irn, 4, in, mtp);
 571         set_irn_pinned(call, get_irn_pinned(node));
 572         irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 573
 574         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 575                 switch (get_Proj_proj(proj)) {
 576                 case pn_Div_M:         /* Memory result. */
 577                         /* reroute to the call */
 578                         set_Proj_pred(proj, call);
 579                         set_Proj_proj(proj, pn_Call_M_except);
 580                         break;
 581                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 582                         /* reroute to the call */
 583                         set_Proj_pred(proj, call);
 584                         set_Proj_proj(proj, pn_Call_X_except);
 585                         break;
 586                 case pn_Div_res:       /* Result of computation. */
 587                         idx = get_irn_idx(proj);
 588                         assert(idx < env->n_entries);
 589                         env->entries[idx]->low_word  = new_r_Proj(current_ir_graph, block, irn, mode, 0);
 590                         env->entries[idx]->high_word = new_r_Proj(current_ir_graph, block, irn, mode, 1);
 591                         break;
 592                 default:
 593                         assert(0 && "unexpected Proj number");
 594                 }  /* switch */
 595                 /* mark this proj: we have handled it already, otherwise we might fall into
 596                  * out new nodes. */
 597                 mark_irn_visited(proj);
 598         }  /* for */
 599 }  /* lower_Div */
 600
 601 /**
 602  * Translate a Mod.
 603  *
 604  * Create an intrinsic Call.
 605  */
 606 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 607         ir_node  *block, *proj, *irn, *call;
 608         ir_node  *in[4];
 609         ir_mode  *opmode;
 610         dbg_info *dbg;
 611         ir_type  *mtp;
 612         int      idx;
 613         ir_graph *irg;
 614         node_entry_t *entry;
 615
 616         irn   = get_Mod_left(node);
 617         entry = env->entries[get_irn_idx(irn)];
 618         assert(entry);
 619
 620         if (! entry->low_word) {
 621                 /* not ready yet, wait */
 622                 pdeq_putr(env->waitq, node);
 623                 return;
 624         }  /* if */
 625
 626         in[0] = entry->low_word;
 627         in[1] = entry->high_word;
 628
 629         irn   = get_Mod_right(node);
 630         entry = env->entries[get_irn_idx(irn)];
 631         assert(entry);
 632
 633         if (! entry->low_word) {
 634                 /* not ready yet, wait */
 635                 pdeq_putr(env->waitq, node);
 636                 return;
 637         }  /* if */
 638
 639         in[2] = entry->low_word;
 640         in[3] = entry->high_word;
 641
 642         dbg   = get_irn_dbg_info(node);
 643         block = get_nodes_block(node);
 644         irg   = current_ir_graph;
 645
 646         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 647         opmode = get_irn_op_mode(node);
 648         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, block, env);
 649         call = new_rd_Call(dbg, irg, block, get_Mod_mem(node),
 650                 irn, 4, in, mtp);
 651         set_irn_pinned(call, get_irn_pinned(node));
 652         irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 653
 654         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 655                 switch (get_Proj_proj(proj)) {
 656                 case pn_Mod_M:         /* Memory result. */
 657                         /* reroute to the call */
 658                         set_Proj_pred(proj, call);
 659                         set_Proj_proj(proj, pn_Call_M_except);
 660                         break;
 661                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 662                         /* reroute to the call */
 663                         set_Proj_pred(proj, call);
 664                         set_Proj_proj(proj, pn_Call_X_except);
 665                         break;
 666                 case pn_Mod_res:       /* Result of computation. */
 667                         idx = get_irn_idx(proj);
 668                         assert(idx < env->n_entries);
 669                         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
 670                         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
 671                         break;
 672                 default:
 673                         assert(0 && "unexpected Proj number");
 674                 }  /* switch */
 675                 /* mark this proj: we have handled it already, otherwise we might fall into
 676                  * out new nodes. */
 677                 mark_irn_visited(proj);
 678         }  /* for */
 679 }  /* lower_Mod */
 680
 681 /**
 682  * Translate a DivMod.
 683  *
 684  * Create two intrinsic Calls.
 685  */
 686 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 687         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod, *resDiv, *resMod;
 688         ir_node  *in[4];
 689         ir_mode  *opmode;
 690         dbg_info *dbg;
 691         ir_type  *mtp;
 692         int      idx;
 693         node_entry_t *entry;
 694         unsigned flags = 0;
 695         ir_graph *irg;
 696
 697         /* check if both results are needed */
 698         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 699                 switch (get_Proj_proj(proj)) {
 700                 case pn_DivMod_res_div: flags |= 1; break;
 701                 case pn_DivMod_res_mod: flags |= 2; break;
 702                 default: break;
 703                 }  /* switch */
 704         }  /* for */
 705
 706         irn   = get_DivMod_left(node);
 707         entry = env->entries[get_irn_idx(irn)];
 708         assert(entry);
 709
 710         if (! entry->low_word) {
 711                 /* not ready yet, wait */
 712                 pdeq_putr(env->waitq, node);
 713                 return;
 714         }  /* if */
 715
 716         in[0] = entry->low_word;
 717         in[1] = entry->high_word;
 718
 719         irn   = get_DivMod_right(node);
 720         entry = env->entries[get_irn_idx(irn)];
 721         assert(entry);
 722
 723         if (! entry->low_word) {
 724                 /* not ready yet, wait */
 725                 pdeq_putr(env->waitq, node);
 726                 return;
 727         }  /* if */
 728
 729         in[2] = entry->low_word;
 730         in[3] = entry->high_word;
 731
 732         dbg   = get_irn_dbg_info(node);
 733         block = get_nodes_block(node);
 734         irg   = current_ir_graph;
 735
 736         mem = get_DivMod_mem(node);
 737
 738         callDiv = callMod = NULL;
 739         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 740         if (flags & 1) {
 741                 opmode = get_irn_op_mode(node);
 742                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, block, env);
 743                 callDiv = new_rd_Call(dbg, irg, block, mem,
 744                         irn, 4, in, mtp);
 745                 set_irn_pinned(callDiv, get_irn_pinned(node));
 746                 resDiv = new_r_Proj(irg, block, callDiv, mode_T, pn_Call_T_result);
 747         }  /* if */
 748         if (flags & 2) {
 749                 if (flags & 1)
 750                         mem = new_r_Proj(irg, block, callDiv, mode_M, pn_Call_M);
 751                 opmode = get_irn_op_mode(node);
 752                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, block, env);
 753                 callMod = new_rd_Call(dbg, irg, block, mem,
 754                         irn, 4, in, mtp);
 755                 set_irn_pinned(callMod, get_irn_pinned(node));
 756                 resMod = new_r_Proj(irg, block, callMod, mode_T, pn_Call_T_result);
 757         }  /* if */
 758
 759         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 760                 switch (get_Proj_proj(proj)) {
 761                 case pn_DivMod_M:         /* Memory result. */
 762                         /* reroute to the first call */
 763                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 764                         set_Proj_proj(proj, pn_Call_M_except);
 765                         break;
 766                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 767                         /* reroute to the first call */
 768                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 769                         set_Proj_proj(proj, pn_Call_X_except);
 770                         break;
 771                 case pn_DivMod_res_div:   /* Result of Div. */
 772                         idx = get_irn_idx(proj);
 773                         assert(idx < env->n_entries);
 774                         env->entries[idx]->low_word  = new_r_Proj(irg, block, resDiv, mode, 0);
 775                         env->entries[idx]->high_word = new_r_Proj(irg, block, resDiv, mode, 1);
 776                         break;
 777                 case pn_DivMod_res_mod:   /* Result of Mod. */
 778                         idx = get_irn_idx(proj);
 779                         env->entries[idx]->low_word  = new_r_Proj(irg, block, resMod, mode, 0);
 780                         env->entries[idx]->high_word = new_r_Proj(irg, block, resMod, mode, 1);
 781                         break;
 782                 default:
 783                         assert(0 && "unexpected Proj number");
 784                 }  /* switch */
 785                 /* mark this proj: we have handled it already, otherwise we might fall into
 786                  * out new nodes. */
 787                 mark_irn_visited(proj);
 788         }  /* for */
 789 }  /* lower_DivMod */
 790
 791 /**
 792  * Translate a Binop.
 793  *
 794  * Create an intrinsic Call.
 795  */
 796 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 797         ir_node  *block, *irn;
 798         ir_node  *in[4];
 799         dbg_info *dbg;
 800         ir_type  *mtp;
 801         int      idx;
 802         ir_graph *irg;
 803         node_entry_t *entry;
 804
 805         irn   = get_binop_left(node);
 806         entry = env->entries[get_irn_idx(irn)];
 807         assert(entry);
 808
 809         if (! entry->low_word) {
 810                 /* not ready yet, wait */
 811                 pdeq_putr(env->waitq, node);
 812                 return;
 813         }  /* if */
 814
 815         in[0] = entry->low_word;
 816         in[1] = entry->high_word;
 817
 818         irn   = get_binop_right(node);
 819         entry = env->entries[get_irn_idx(irn)];
 820         assert(entry);
 821
 822         if (! entry->low_word) {
 823                 /* not ready yet, wait */
 824                 pdeq_putr(env->waitq, node);
 825                 return;
 826         }  /* if */
 827
 828         in[2] = entry->low_word;
 829         in[3] = entry->high_word;
 830
 831         dbg   = get_irn_dbg_info(node);
 832         block = get_nodes_block(node);
 833         irg   = current_ir_graph;
 834
 835         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 836         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
 837         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
 838                 irn, 4, in, mtp);
 839         set_irn_pinned(irn, get_irn_pinned(node));
 840         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
 841
 842         idx = get_irn_idx(node);
 843         assert(idx < env->n_entries);
 844         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
 845         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
 846 }  /* lower_Binop */
 847
 848 /**
 849  * Translate a Shiftop.
 850  *
 851  * Create an intrinsic Call.
 852  */
 853 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 854         ir_node  *block, *irn;
 855         ir_node  *in[3];
 856         dbg_info *dbg;
 857         ir_type  *mtp;
 858         int      idx;
 859         ir_graph *irg;
 860         node_entry_t *entry;
 861
 862         irn   = get_binop_left(node);
 863         entry = env->entries[get_irn_idx(irn)];
 864         assert(entry);
 865
 866         if (! entry->low_word) {
 867                 /* not ready yet, wait */
 868                 pdeq_putr(env->waitq, node);
 869                 return;
 870         }  /* if */
 871
 872         in[0] = entry->low_word;
 873         in[1] = entry->high_word;
 874
 875         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 876         in[2] = get_binop_right(node);
 877
 878         dbg   = get_irn_dbg_info(node);
 879         block = get_nodes_block(node);
 880         irg  = current_ir_graph;
 881
 882         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 883         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
 884         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
 885                 irn, 3, in, mtp);
 886         set_irn_pinned(irn, get_irn_pinned(node));
 887         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
 888
 889         idx = get_irn_idx(node);
 890         assert(idx < env->n_entries);
 891         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
 892         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
 893 }  /* lower_Shiftop */
 894
 895 /**
 896  * Translate a Shr and handle special cases.
 897  */
 898 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env) {
 899         ir_node  *right = get_Shr_right(node);
 900         ir_graph *irg = current_ir_graph;
 901
 902         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 903                 tarval *tv = get_Const_tarval(right);
 904
 905                 if (tarval_is_long(tv) &&
 906                         get_tarval_long(tv) >= get_mode_size_bits(mode)) {
 907                         ir_node *block = get_nodes_block(node);
 908                         ir_node *left = get_Shr_left(node);
 909                         ir_node *c;
 910                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 911                         int idx = get_irn_idx(left);
 912
 913                         left = env->entries[idx]->high_word;
 914                         idx = get_irn_idx(node);
 915
 916                         if (shf_cnt > 0) {
 917                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
 918                                 env->entries[idx]->low_word = new_r_Shr(irg, block, left, c, mode);
 919                         } else {
 920                                 env->entries[idx]->low_word = left;
 921                         }  /* if */
 922                         env->entries[idx]->high_word = new_r_Const(irg, block, mode, get_mode_null(mode));
 923
 924                         return;
 925                 }  /* if */
 926         }  /* if */
 927         lower_Shiftop(node, mode, env);
 928 }  /* lower_Shr */
 929
 930 /**
 931  * Translate a Shl and handle special cases.
 932  */
 933 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env) {
 934         ir_node  *right = get_Shl_right(node);
 935         ir_graph *irg = current_ir_graph;
 936
 937         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 938                 tarval *tv = get_Const_tarval(right);
 939
 940                 if (tarval_is_long(tv) &&
 941                         get_tarval_long(tv) >= get_mode_size_bits(mode)) {
 942                         ir_node *block = get_nodes_block(node);
 943                         ir_node *left = get_Shl_left(node);
 944                         ir_node *c;
 945                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 946                         int idx = get_irn_idx(left);
 947
 948                         left = env->entries[idx]->low_word;
 949                         idx = get_irn_idx(node);
 950
 951                         if (shf_cnt > 0) {
 952                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
 953                                 env->entries[idx]->high_word = new_r_Shl(irg, block, left, c, mode);
 954                         } else {
 955                                 env->entries[idx]->high_word = left;
 956                         }  /* if */
 957                         env->entries[idx]->low_word  = new_r_Const(irg, block, mode, get_mode_null(mode));
 958
 959                         return;
 960                 }  /* if */
 961         }  /* if */
 962         lower_Shiftop(node, mode, env);
 963 }  /* lower_Shl */
 964
 965 /**
 966  * Translate a Shrs and handle special cases.
 967  */
 968 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env) {
 969         ir_node  *right = get_Shrs_right(node);
 970         ir_graph *irg = current_ir_graph;
 971
 972         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 973                 tarval *tv = get_Const_tarval(right);
 974
 975                 if (tarval_is_long(tv) &&
 976                         get_tarval_long(tv) >= get_mode_size_bits(mode)) {
 977                         ir_node *block = get_nodes_block(node);
 978                         ir_node *left = get_Shrs_left(node);
 979                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 980                         ir_node *c;
 981                         int idx = get_irn_idx(left);
 982
 983                         left = env->entries[idx]->high_word;
 984                         idx = get_irn_idx(node);
 985
 986                         if (shf_cnt > 0) {
 987                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
 988                                 env->entries[idx]->low_word = new_r_Shrs(irg, block, left, c, mode);
 989                         } else {
 990                                 env->entries[idx]->low_word = left;
 991                         }  /* if */
 992                         c = new_r_Const_long(irg, block, mode_Iu, get_mode_size_bits(mode) - 1);
 993                         env->entries[idx]->high_word = new_r_Shrs(irg, block, left, c, mode);
 994
 995                         return;
 996                 }  /* if */
 997         }  /* if */
 998         lower_Shiftop(node, mode, env);
 999 }  /* lower_Shrs */
1000
1001 /**
1002  * Translate a Rot and handle special cases.
1003  */
1004 static void lower_Rot(ir_node *node, ir_mode *mode, lower_env_t *env) {
1005         ir_node  *right = get_Rot_right(node);
1006
1007         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1008                 tarval *tv = get_Const_tarval(right);
1009
1010                 if (tarval_is_long(tv) &&
1011                         get_tarval_long(tv) == get_mode_size_bits(mode)) {
1012                         ir_node *left = get_Rot_left(node);
1013                         ir_node *h, *l;
1014                         int idx = get_irn_idx(left);
1015
1016                         l = env->entries[idx]->low_word;
1017                         h = env->entries[idx]->high_word;
1018                         idx = get_irn_idx(node);
1019
1020                         env->entries[idx]->low_word  = h;
1021                         env->entries[idx]->high_word = l;
1022
1023                         return;
1024                 }  /* if */
1025         }  /* if */
1026         lower_Shiftop(node, mode, env);
1027 }  /* lower_Rot */
1028
1029 /**
1030  * Translate an Unop.
1031  *
1032  * Create an intrinsic Call.
1033  */
1034 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env) {
1035         ir_node  *block, *irn;
1036         ir_node  *in[2];
1037         dbg_info *dbg;
1038         ir_type  *mtp;
1039         int      idx;
1040         ir_graph *irg;
1041         node_entry_t *entry;
1042
1043         irn   = get_unop_op(node);
1044         entry = env->entries[get_irn_idx(irn)];
1045         assert(entry);
1046
1047         if (! entry->low_word) {
1048                 /* not ready yet, wait */
1049                 pdeq_putr(env->waitq, node);
1050                 return;
1051         }  /* if */
1052
1053         in[0] = entry->low_word;
1054         in[1] = entry->high_word;
1055
1056         dbg   = get_irn_dbg_info(node);
1057         block = get_nodes_block(node);
1058         irg   = current_ir_graph;
1059
1060         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1061         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
1062         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
1063                 irn, 2, in, mtp);
1064         set_irn_pinned(irn, get_irn_pinned(node));
1065         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
1066
1067         idx = get_irn_idx(node);
1068         assert(idx < env->n_entries);
1069         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
1070         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
1071 }  /* lower_Unop */
1072
1073 /**
1074  * Translate a logical Binop.
1075  *
1076  * Create two logical Binops.
1077  */
1078 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1079                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_graph *irg, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1080         ir_node  *block, *irn;
1081         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1082         dbg_info *dbg;
1083         int      idx;
1084         ir_graph *irg;
1085         node_entry_t *entry;
1086
1087         irn   = get_binop_left(node);
1088         entry = env->entries[get_irn_idx(irn)];
1089         assert(entry);
1090
1091         if (! entry->low_word) {
1092                 /* not ready yet, wait */
1093                 pdeq_putr(env->waitq, node);
1094                 return;
1095         }  /* if */
1096
1097         lop_l = entry->low_word;
1098         lop_h = entry->high_word;
1099
1100         irn   = get_binop_right(node);
1101         entry = env->entries[get_irn_idx(irn)];
1102         assert(entry);
1103
1104         if (! entry->low_word) {
1105                 /* not ready yet, wait */
1106                 pdeq_putr(env->waitq, node);
1107                 return;
1108         }  /* if */
1109
1110         rop_l = entry->low_word;
1111         rop_h = entry->high_word;
1112
1113         dbg = get_irn_dbg_info(node);
1114         block = get_nodes_block(node);
1115
1116         idx = get_irn_idx(node);
1117         assert(idx < env->n_entries);
1118         irg = current_ir_graph;
1119         env->entries[idx]->low_word  = constr_rd(dbg, irg, block, lop_l, rop_l, mode);
1120         env->entries[idx]->high_word = constr_rd(dbg, irg, block, lop_h, rop_h, mode);
1121 }  /* lower_Binop_logical */
1122
1123 /** create a logical operation tranformation */
1124 #define lower_logical(op)                                                \
1125 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1126         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1127 }
1128
1129 lower_logical(And)
1130 lower_logical(Or)
1131 lower_logical(Eor)
1132
1133 /**
1134  * Translate a Not.
1135  *
1136  * Create two logical Nots.
1137  */
1138 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env) {
1139         ir_node  *block, *irn;
1140         ir_node  *op_l, *op_h;
1141         dbg_info *dbg;
1142         int      idx;
1143         ir_graph *irg;
1144         node_entry_t *entry;
1145
1146         irn   = get_Not_op(node);
1147         entry = env->entries[get_irn_idx(irn)];
1148         assert(entry);
1149
1150         if (! entry->low_word) {
1151                 /* not ready yet, wait */
1152                 pdeq_putr(env->waitq, node);
1153                 return;
1154         }  /* if */
1155
1156         op_l = entry->low_word;
1157         op_h = entry->high_word;
1158
1159         dbg   = get_irn_dbg_info(node);
1160         block = get_nodes_block(node);
1161         irg   = current_ir_graph;
1162
1163         idx = get_irn_idx(node);
1164         assert(idx < env->n_entries);
1165         env->entries[idx]->low_word  = new_rd_Not(dbg, current_ir_graph, block, op_l, mode);
1166         env->entries[idx]->high_word = new_rd_Not(dbg, current_ir_graph, block, op_h, mode);
1167 }  /* lower_Not */
1168
1169 /**
1170  * Translate a Cond.
1171  */
1172 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
1173         ir_node *cmp, *left, *right, *block;
1174         ir_node *sel = get_Cond_selector(node);
1175         ir_mode *m = get_irn_mode(sel);
1176         int     idx;
1177
1178         if (m == mode_b) {
1179                 node_entry_t *lentry, *rentry;
1180                 ir_node  *proj, *projT = NULL, *projF = NULL;
1181                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1182                 ir_node  *projHF, *projHT;
1183                 ir_node  *dst_blk;
1184                 ir_graph *irg;
1185                 pn_Cmp   pnc;
1186                 dbg_info *dbg;
1187
1188                 cmp   = get_Proj_pred(sel);
1189                 left  = get_Cmp_left(cmp);
1190                 idx   = get_irn_idx(left);
1191                 lentry = env->entries[idx];
1192
1193                 if (! lentry) {
1194                         /* a normal Cmp */
1195                         return;
1196                 }  /* if */
1197
1198                 right = get_Cmp_right(cmp);
1199                 idx   = get_irn_idx(right);
1200                 rentry = env->entries[idx];
1201                 assert(rentry);
1202
1203                 if (! lentry->low_word || !rentry->low_word) {
1204                         /* not yet ready */
1205                         pdeq_putr(env->waitq, node);
1206                         return;
1207                 }  /* if */
1208
1209                 /* all right, build the code */
1210                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1211                         long proj_nr = get_Proj_proj(proj);
1212
1213                         if (proj_nr == pn_Cond_true) {
1214                                 assert(projT == NULL && "more than one Proj(true)");
1215                                 projT = proj;
1216                         } else {
1217                                 assert(proj_nr == pn_Cond_false);
1218                                 assert(projF == NULL && "more than one Proj(false)");
1219                                 projF = proj;
1220                         }  /* if */
1221                         mark_irn_visited(proj);
1222                 }  /* for */
1223                 assert(projT && projF);
1224
1225                 /* create a new high compare */
1226                 block = get_nodes_block(cmp);
1227                 dbg   = get_irn_dbg_info(cmp);
1228                 irg   = current_ir_graph;
1229
1230                 cmpH = new_rd_Cmp(dbg, irg, block, lentry->high_word, rentry->high_word);
1231
1232                 pnc = get_Proj_proj(sel);
1233                 if (pnc == pn_Cmp_Eq) {
1234                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1235                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1236
1237                         assert(entry);
1238                         dst_blk = entry->value;
1239
1240                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Eq);
1241                         dbg = get_irn_dbg_info(node);
1242                         irn = new_rd_Cond(dbg, irg, block, irn);
1243
1244                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1245                         mark_irn_visited(projHF);
1246                         exchange(projF, projHF);
1247
1248                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1249                         mark_irn_visited(projHT);
1250
1251                         new_bl = new_r_Block(irg, 1, &projHT);
1252
1253                         dbg   = get_irn_dbg_info(cmp);
1254                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1255                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Eq);
1256                         dbg = get_irn_dbg_info(node);
1257                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1258
1259                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1260                         mark_irn_visited(proj);
1261                         add_block_cf_input(dst_blk, projHF, proj);
1262
1263                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1264                         mark_irn_visited(proj);
1265                         exchange(projT, proj);
1266                 } else if (pnc == pn_Cmp_Lg) {
1267                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1268                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1269
1270                         assert(entry);
1271                         dst_blk = entry->value;
1272
1273                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Lg);
1274                         dbg = get_irn_dbg_info(node);
1275                         irn = new_rd_Cond(dbg, irg, block, irn);
1276
1277                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1278                         mark_irn_visited(projHT);
1279                         exchange(projT, projHT);
1280
1281                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1282                         mark_irn_visited(projHF);
1283
1284                         new_bl = new_r_Block(irg, 1, &projHF);
1285
1286                         dbg   = get_irn_dbg_info(cmp);
1287                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1288                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Lg);
1289                         dbg = get_irn_dbg_info(node);
1290                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1291
1292                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1293                         mark_irn_visited(proj);
1294                         add_block_cf_input(dst_blk, projHT, proj);
1295
1296                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1297                         mark_irn_visited(proj);
1298                         exchange(projF, proj);
1299                 } else {
1300                         /* a rel b <==> a_h rel b_h || (a_h == b_h && a_l rel b_l) */
1301                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1302                         pmap_entry *entry;
1303
1304                         entry = pmap_find(env->proj_2_block, projT);
1305                         assert(entry);
1306                         dstT = entry->value;
1307
1308                         entry = pmap_find(env->proj_2_block, projF);
1309                         assert(entry);
1310                         dstF = entry->value;
1311
1312                         irn = new_r_Proj(irg, block, cmpH, mode_b, pnc);
1313                         dbg = get_irn_dbg_info(node);
1314                         irn = new_rd_Cond(dbg, irg, block, irn);
1315
1316                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1317                         mark_irn_visited(projHT);
1318                         exchange(projT, projHT);
1319                         projT = projHT;
1320
1321                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1322                         mark_irn_visited(projHF);
1323
1324                         newbl_eq = new_r_Block(irg, 1, &projHF);
1325
1326                         irn = new_r_Proj(irg, newbl_eq, cmpH, mode_b, pn_Cmp_Eq);
1327                         irn = new_rd_Cond(dbg, irg, newbl_eq, irn);
1328
1329                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_false);
1330                         mark_irn_visited(proj);
1331                         exchange(projF, proj);
1332                         projF = proj;
1333
1334                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_true);
1335                         mark_irn_visited(proj);
1336
1337                         newbl_l = new_r_Block(irg, 1, &proj);
1338
1339                         dbg   = get_irn_dbg_info(cmp);
1340                         cmpL = new_rd_Cmp(dbg, irg, newbl_l, lentry->low_word, rentry->low_word);
1341                         irn = new_r_Proj(irg, newbl_l, cmpL, mode_b, pnc);
1342                         dbg = get_irn_dbg_info(node);
1343                         irn = new_rd_Cond(dbg, irg, newbl_l, irn);
1344
1345                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_true);
1346                         mark_irn_visited(proj);
1347                         add_block_cf_input(dstT, projT, proj);
1348
1349                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_false);
1350                         mark_irn_visited(proj);
1351                         add_block_cf_input(dstF, projF, proj);
1352                 }  /* if */
1353
1354                 /* we have changed the control flow */
1355                 env->flags |= CF_CHANGED;
1356         } else {
1357                 idx = get_irn_idx(sel);
1358
1359                 if (env->entries[idx]) {
1360                         /*
1361                            Bad, a jump-table with double-word index.
1362                            This should not happen, but if it does we handle
1363                            it like a Conv were between (in other words, ignore
1364                            the high part.
1365                          */
1366
1367                         if (! env->entries[idx]->low_word) {
1368                                 /* not ready yet, wait */
1369                                 pdeq_putr(env->waitq, node);
1370                                 return;
1371                         }  /* if */
1372                         set_Cond_selector(node, env->entries[idx]->low_word);
1373                 }  /* if */
1374         }  /* if */
1375 }  /* lower_Cond */
1376
1377 /**
1378  * Translate a Conv to higher_signed
1379  */
1380 static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
1381         ir_node  *op    = get_Conv_op(node);
1382         ir_mode  *imode = get_irn_mode(op);
1383         ir_mode  *dst_mode = env->params->low_signed;
1384         int      idx = get_irn_idx(node);
1385         ir_graph *irg = current_ir_graph;
1386         ir_node  *block = get_nodes_block(node);
1387         dbg_info *dbg = get_irn_dbg_info(node);
1388
1389         assert(idx < env->n_entries);
1390
1391         if (mode_is_int(imode) || mode_is_reference(imode)) {
1392                 if (imode == env->params->high_unsigned) {
1393                         /* a Conv from Lu to Ls */
1394                         int op_idx = get_irn_idx(op);
1395
1396                         if (! env->entries[op_idx]->low_word) {
1397                                 /* not ready yet, wait */
1398                                 pdeq_putr(env->waitq, node);
1399                                 return;
1400                         }  /* if */
1401                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word, dst_mode);
1402                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode);
1403                 } else {
1404                         /* simple case: create a high word */
1405                         if (imode != dst_mode)
1406                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode);
1407
1408                         env->entries[idx]->low_word  = op;
1409                         env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op,
1410                                 new_Const_long(mode_Iu, get_mode_size_bits(dst_mode) - 1), dst_mode);
1411                 }  /* if */
1412         } else {
1413                 ir_node *irn, *call;
1414                 ir_mode *omode = env->params->high_signed;
1415                 ir_type *mtp = get_conv_type(imode, omode, env);
1416
1417                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1418                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1419                 set_irn_pinned(call, get_irn_pinned(node));
1420                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1421
1422                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode, 0);
1423                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode, 1);
1424         }  /* if */
1425 }  /* lower_Conv_to_Ls */
1426
1427 /**
1428  * Translate a Conv to higher_unsigned
1429  */
1430 static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
1431         ir_node  *op    = get_Conv_op(node);
1432         ir_mode  *imode = get_irn_mode(op);
1433         ir_mode  *dst_mode = env->params->low_unsigned;
1434         int      idx = get_irn_idx(node);
1435         ir_graph *irg = current_ir_graph;
1436         ir_node  *block = get_nodes_block(node);
1437         dbg_info *dbg = get_irn_dbg_info(node);
1438
1439         assert(idx < env->n_entries);
1440
1441         if (mode_is_int(imode) || mode_is_reference(imode)) {
1442                 if (imode == env->params->high_signed) {
1443                         /* a Conv from Ls to Lu */
1444                         int op_idx = get_irn_idx(op);
1445
1446                         if (! env->entries[op_idx]->low_word) {
1447                                 /* not ready yet, wait */
1448                                 pdeq_putr(env->waitq, node);
1449                                 return;
1450                         }  /* if */
1451                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word, dst_mode);
1452                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode);
1453                 } else {
1454                         /* simple case: create a high word */
1455                         if (imode != dst_mode)
1456                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode);
1457
1458                         env->entries[idx]->low_word  = op;
1459                         env->entries[idx]->high_word = new_Const(dst_mode, get_mode_null(dst_mode));
1460                 }  /* if */
1461         } else {
1462                 ir_node *irn, *call;
1463                 ir_mode *omode = env->params->high_unsigned;
1464                 ir_type *mtp = get_conv_type(imode, omode, env);
1465
1466                 /* do an intrinsic call */
1467                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1468                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1469                 set_irn_pinned(call, get_irn_pinned(node));
1470                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1471
1472                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode, 0);
1473                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode, 1);
1474         }  /* if */
1475 }  /* lower_Conv_to_Lu */
1476
1477 /**
1478  * Translate a Conv from higher_signed
1479  */
1480 static void lower_Conv_from_Ls(ir_node *node, lower_env_t *env) {
1481         ir_node  *op    = get_Conv_op(node);
1482         ir_mode  *omode = get_irn_mode(node);
1483         ir_node  *block = get_nodes_block(node);
1484         dbg_info *dbg = get_irn_dbg_info(node);
1485         int      idx = get_irn_idx(op);
1486         ir_graph *irg = current_ir_graph;
1487
1488         assert(idx < env->n_entries);
1489
1490         if (mode_is_int(omode) || mode_is_reference(omode)) {
1491                 op = env->entries[idx]->low_word;
1492
1493                 /* simple case: create a high word */
1494                 if (omode != env->params->low_signed)
1495                         op = new_rd_Conv(dbg, irg, block, op, omode);
1496
1497                 set_Conv_op(node, op);
1498         } else {
1499                 ir_node *irn, *call, *in[2];
1500                 ir_mode *imode = env->params->high_signed;
1501                 ir_type *mtp = get_conv_type(imode, omode, env);
1502
1503                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1504                 in[0] = env->entries[idx]->low_word;
1505                 in[1] = env->entries[idx]->high_word;
1506
1507                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1508                 set_irn_pinned(call, get_irn_pinned(node));
1509                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1510
1511                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1512         }  /* if */
1513 }  /* lower_Conv_from_Ls */
1514
1515 /**
1516  * Translate a Conv from higher_unsigned
1517  */
1518 static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
1519         ir_node  *op    = get_Conv_op(node);
1520         ir_mode  *omode = get_irn_mode(node);
1521         ir_node  *block = get_nodes_block(node);
1522         dbg_info *dbg = get_irn_dbg_info(node);
1523         int      idx = get_irn_idx(op);
1524         ir_graph *irg = current_ir_graph;
1525
1526         assert(idx < env->n_entries);
1527
1528         if (mode_is_int(omode) || mode_is_reference(omode)) {
1529                 op = env->entries[idx]->low_word;
1530
1531                 /* simple case: create a high word */
1532                 if (omode != env->params->low_unsigned)
1533                         op = new_rd_Conv(dbg, irg, block, op, omode);
1534
1535                 set_Conv_op(node, op);
1536         } else {
1537                 ir_node *irn, *call, *in[2];
1538                 ir_mode *imode = env->params->high_unsigned;
1539                 ir_type *mtp = get_conv_type(imode, omode, env);
1540
1541                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1542                 in[0] = env->entries[idx]->low_word;
1543                 in[1] = env->entries[idx]->high_word;
1544
1545                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1546                 set_irn_pinned(call, get_irn_pinned(node));
1547                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1548
1549                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1550         }  /* if */
1551 }  /* lower_Conv_from_Lu */
1552
1553 /**
1554  * Translate a Conv.
1555  */
1556 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env) {
1557         mode = get_irn_mode(node);
1558
1559         if (mode == env->params->high_signed) {
1560                 lower_Conv_to_Ls(node, env);
1561         } else if (mode == env->params->high_unsigned) {
1562                 lower_Conv_to_Lu(node, env);
1563         } else {
1564                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1565
1566                 if (mode == env->params->high_signed) {
1567                         lower_Conv_from_Ls(node, env);
1568                 } else {
1569                         assert(mode == env->params->high_unsigned);
1570                         lower_Conv_from_Lu(node, env);
1571                 }  /* if */
1572         }  /* if */
1573 }  /* lower_Conv */
1574
1575 /**
1576  * Lower the method type.
1577  */
1578 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
1579         pmap_entry *entry;
1580         ident      *id;
1581         ir_type    *res;
1582
1583         if (is_lowered_type(mtp))
1584                 return mtp;
1585
1586         entry = pmap_find(lowered_type, mtp);
1587         if (! entry) {
1588                 int i, n, r, n_param, n_res;
1589
1590                 /* count new number of params */
1591                 n_param = n = get_method_n_params(mtp);
1592                 for (i = n_param - 1; i >= 0; --i) {
1593                         ir_type *tp = get_method_param_type(mtp, i);
1594
1595                         if (is_Primitive_type(tp)) {
1596                                 ir_mode *mode = get_type_mode(tp);
1597
1598                                 if (mode == env->params->high_signed ||
1599                                         mode == env->params->high_unsigned)
1600                                         ++n_param;
1601                         }  /* if */
1602                 }  /* for */
1603
1604                 /* count new number of results */
1605                 n_res = r = get_method_n_ress(mtp);
1606                 for (i = n_res - 1; i >= 0; --i) {
1607                         ir_type *tp = get_method_res_type(mtp, i);
1608
1609                         if (is_Primitive_type(tp)) {
1610                                 ir_mode *mode = get_type_mode(tp);
1611
1612                                 if (mode == env->params->high_signed ||
1613                                         mode == env->params->high_unsigned)
1614                                         ++n_res;
1615                         }  /* if */
1616                 }  /* for */
1617
1618                 id = mangle_u(new_id_from_chars("L", 1), get_type_ident(mtp));
1619                 res = new_type_method(id, n_param, n_res);
1620
1621                 /* set param types and result types */
1622                 for (i = n_param = 0; i < n; ++i) {
1623                         ir_type *tp = get_method_param_type(mtp, i);
1624
1625                         if (is_Primitive_type(tp)) {
1626                                 ir_mode *mode = get_type_mode(tp);
1627
1628                                 if (mode == env->params->high_signed) {
1629                                         set_method_param_type(res, n_param++, tp_s);
1630                                         set_method_param_type(res, n_param++, tp_s);
1631                                 } else if (mode == env->params->high_unsigned) {
1632                                         set_method_param_type(res, n_param++, tp_u);
1633                                         set_method_param_type(res, n_param++, tp_u);
1634                                 } else {
1635                                         set_method_param_type(res, n_param++, tp);
1636                                 }  /* if */
1637                         } else {
1638                                 set_method_param_type(res, n_param++, tp);
1639                         }  /* if */
1640                 }  /* for */
1641                 for (i = n_res = 0; i < r; ++i) {
1642                         ir_type *tp = get_method_res_type(mtp, i);
1643
1644                         if (is_Primitive_type(tp)) {
1645                                 ir_mode *mode = get_type_mode(tp);
1646
1647                                 if (mode == env->params->high_signed) {
1648                                         set_method_res_type(res, n_res++, tp_s);
1649                                         set_method_res_type(res, n_res++, tp_s);
1650                                 } else if (mode == env->params->high_unsigned) {
1651                                         set_method_res_type(res, n_res++, tp_u);
1652                                         set_method_res_type(res, n_res++, tp_u);
1653                                 } else {
1654                                         set_method_res_type(res, n_res++, tp);
1655                                 }  /* if */
1656                         } else {
1657                                 set_method_res_type(res, n_res++, tp);
1658                         }  /* if */
1659                 }  /* for */
1660                 set_lowered_type(mtp, res);
1661                 pmap_insert(lowered_type, mtp, res);
1662         } else {
1663                 res = entry->value;
1664         }  /* if */
1665         return res;
1666 }  /* lower_mtp */
1667
1668 /**
1669  * Translate a Return.
1670  */
1671 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
1672         ir_graph *irg = current_ir_graph;
1673         entity   *ent = get_irg_entity(irg);
1674         ir_type  *mtp = get_entity_type(ent);
1675         ir_node  **in;
1676         int      i, j, n, idx;
1677         int      need_conv = 0;
1678
1679         /* check if this return must be lowered */
1680         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1681                 ir_node *pred = get_Return_res(node, i);
1682                 ir_mode *mode = get_irn_op_mode(pred);
1683
1684                 if (mode == env->params->high_signed ||
1685                         mode == env->params->high_unsigned) {
1686                         idx = get_irn_idx(pred);
1687                         if (! env->entries[idx]->low_word) {
1688                                 /* not ready yet, wait */
1689                                 pdeq_putr(env->waitq, node);
1690                                 return;
1691                         }  /* if */
1692                         need_conv = 1;
1693                 }  /* if */
1694         }  /* for */
1695         if (! need_conv)
1696                 return;
1697
1698         ent = get_irg_entity(irg);
1699         mtp = get_entity_type(ent);
1700
1701         mtp = lower_mtp(mtp, env);
1702         set_entity_type(ent, mtp);
1703
1704         /* create a new in array */
1705         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1706         in[0] = get_Return_mem(node);
1707
1708         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1709                 ir_node *pred = get_Return_res(node, i);
1710
1711                 idx = get_irn_idx(pred);
1712                 assert(idx < env->n_entries);
1713
1714                 if (env->entries[idx]) {
1715                         in[++j] = env->entries[idx]->low_word;
1716                         in[++j] = env->entries[idx]->high_word;
1717                 } else {
1718                         in[++j] = pred;
1719                 }  /* if */
1720         }  /* for */
1721
1722         set_irn_in(node, j+1, in);
1723 }  /* lower_Return */
1724
1725 /**
1726  * Translate the parameters.
1727  */
1728 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env) {
1729         ir_graph *irg = current_ir_graph;
1730         entity   *ent = get_irg_entity(irg);
1731         ir_type  *tp  = get_entity_type(ent);
1732         ir_type  *mtp;
1733         long     *new_projs;
1734         int      i, j, n_params, rem;
1735         ir_node  *proj, *args;
1736
1737         if (is_lowered_type(tp)) {
1738                 mtp = get_associated_type(tp);
1739         } else {
1740                 mtp = tp;
1741         }  /* if */
1742         assert(! is_lowered_type(mtp));
1743
1744         n_params = get_method_n_params(mtp);
1745         if (n_params <= 0)
1746                 return;
1747
1748         NEW_ARR_A(long, new_projs, n_params);
1749
1750         /* first check if we have parameters that must be fixed */
1751         for (i = j = 0; i < n_params; ++i, ++j) {
1752                 ir_type *tp = get_method_param_type(mtp, i);
1753
1754                 new_projs[i] = j;
1755                 if (is_Primitive_type(tp)) {
1756                         ir_mode *mode = get_type_mode(tp);
1757
1758                         if (mode == env->params->high_signed ||
1759                                 mode == env->params->high_unsigned)
1760                                 ++j;
1761                 }  /* if */
1762         }  /* for */
1763         if (i == j)
1764                 return;
1765
1766         mtp = lower_mtp(mtp, env);
1767         set_entity_type(ent, mtp);
1768
1769         /* switch off optimization for new Proj nodes or they might be CSE'ed
1770            with not patched one's */
1771         rem = get_optimize();
1772         set_optimize(0);
1773
1774         /* ok, fix all Proj's and create new ones */
1775         args = get_irg_args(irg);
1776         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1777                 ir_node *pred = get_Proj_pred(proj);
1778                 long proj_nr;
1779                 int idx;
1780                 ir_mode *mode;
1781                 dbg_info *dbg;
1782
1783                 /* do not visit this node again */
1784                 mark_irn_visited(proj);
1785
1786                 if (pred != args)
1787                         continue;
1788
1789                 proj_nr = get_Proj_proj(proj);
1790                 set_Proj_proj(proj, new_projs[proj_nr]);
1791
1792                 idx = get_irn_idx(proj);
1793                 if (env->entries[idx]) {
1794                         mode = get_irn_mode(proj);
1795
1796                         if (mode == env->params->high_signed) {
1797                                 mode = env->params->low_signed;
1798                         } else {
1799                                 mode = env->params->low_unsigned;
1800                         }  /* if */
1801
1802                         dbg = get_irn_dbg_info(proj);
1803                         env->entries[idx]->low_word  =
1804                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, mode, new_projs[proj_nr]);
1805                         env->entries[idx]->high_word =
1806                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, mode, new_projs[proj_nr] + 1);
1807                 }  /* if */
1808         }  /* for */
1809         set_optimize(rem);
1810 }  /* lower_Start */
1811
1812 /**
1813  * Translate a Call.
1814  */
1815 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
1816         ir_graph *irg = current_ir_graph;
1817         ir_type  *tp = get_Call_type(node);
1818         ir_type  *call_tp;
1819         ir_node  **in, *proj, *results;
1820         int      n_params, n_res, need_lower = 0;
1821         int      i, j;
1822         long     *res_numbers = NULL;
1823
1824         if (is_lowered_type(tp)) {
1825                 call_tp = get_associated_type(tp);
1826         } else {
1827                 call_tp = tp;
1828         }  /* if */
1829
1830         assert(! is_lowered_type(call_tp));
1831
1832         n_params = get_method_n_params(call_tp);
1833         for (i = 0; i < n_params; ++i) {
1834                 ir_type *tp = get_method_param_type(call_tp, i);
1835
1836                 if (is_Primitive_type(tp)) {
1837                         ir_mode *mode = get_type_mode(tp);
1838
1839                         if (mode == env->params->high_signed ||
1840                                 mode == env->params->high_unsigned) {
1841                                 need_lower = 1;
1842                                 break;
1843                         }  /* if */
1844                 }  /* if */
1845         }  /* for */
1846         n_res = get_method_n_ress(call_tp);
1847         if (n_res > 0) {
1848                 NEW_ARR_A(long, res_numbers, n_res);
1849
1850                 for (i = j = 0; i < n_res; ++i, ++j) {
1851                         ir_type *tp = get_method_res_type(call_tp, i);
1852
1853                         res_numbers[i] = j;
1854                         if (is_Primitive_type(tp)) {
1855                                 ir_mode *mode = get_type_mode(tp);
1856
1857                                 if (mode == env->params->high_signed ||
1858                                         mode == env->params->high_unsigned) {
1859                                         need_lower = 1;
1860                                         ++j;
1861                                 }  /* if */
1862                         }  /* if */
1863                 }  /* for */
1864         }  /* if */
1865
1866         if (! need_lower)
1867                 return;
1868
1869         /* let's lower it */
1870         call_tp = lower_mtp(call_tp, env);
1871         set_Call_type(node, call_tp);
1872
1873         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1874
1875         in[0] = get_Call_mem(node);
1876         in[1] = get_Call_ptr(node);
1877
1878         for (j = 2, i = 0; i < n_params; ++i) {
1879                 ir_node *pred = get_Call_param(node, i);
1880                 int     idx = get_irn_idx(pred);
1881
1882                 if (env->entries[idx]) {
1883                         if (! env->entries[idx]->low_word) {
1884                                 /* not ready yet, wait */
1885                                 pdeq_putr(env->waitq, node);
1886                                 return;
1887                         }
1888                         in[j++] = env->entries[idx]->low_word;
1889                         in[j++] = env->entries[idx]->high_word;
1890                 } else {
1891                         in[j++] = pred;
1892                 }  /* if */
1893         }  /* for */
1894
1895         set_irn_in(node, j, in);
1896
1897         /* fix the results */
1898         results = NULL;
1899         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1900                 long proj_nr = get_Proj_proj(proj);
1901
1902                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
1903                         /* found the result proj */
1904                         results = proj;
1905                         break;
1906                 }  /* if */
1907         }  /* for */
1908
1909         if (results) {          /* there are results */
1910                 int rem = get_optimize();
1911
1912                 /* switch off optimization for new Proj nodes or they might be CSE'ed
1913                    with not patched one's */
1914                 set_optimize(0);
1915                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
1916                         if (get_Proj_pred(proj) == results) {
1917                                 long proj_nr = get_Proj_proj(proj);
1918                                 int idx;
1919
1920                                 /* found a result */
1921                                 set_Proj_proj(proj, res_numbers[proj_nr]);
1922                                 idx = get_irn_idx(proj);
1923                                 if (env->entries[idx]) {
1924                                         ir_mode *mode = get_irn_mode(proj);
1925                                         dbg_info *dbg;
1926
1927                                         if (mode == env->params->high_signed) {
1928                                                 mode = env->params->low_signed;
1929                                         } else {
1930                                                 mode = env->params->low_unsigned;
1931                                         }  /* if */
1932
1933                                         dbg = get_irn_dbg_info(proj);
1934                                         env->entries[idx]->low_word  =
1935                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, mode, res_numbers[proj_nr]);
1936                                         env->entries[idx]->high_word =
1937                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, mode, res_numbers[proj_nr] + 1);
1938                                 }  /* if */
1939                                 mark_irn_visited(proj);
1940                         }  /* if */
1941                 }  /* for */
1942                 set_optimize(rem);
1943         }
1944 }  /* lower_Call */
1945
1946 /**
1947  * Translate an Unknown into two.
1948  */
1949 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env) {
1950         int idx = get_irn_idx(node);
1951         ir_graph *irg = current_ir_graph;
1952
1953         env->entries[idx]->low_word  =
1954         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
1955 }  /* lower_Unknown */
1956
1957 /**
1958  * Translate a Phi.
1959  *
1960  * First step: just create two templates
1961  */
1962 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
1963         ir_graph *irg = current_ir_graph;
1964         ir_node  *block, *unk;
1965         ir_node  **inl, **inh;
1966         dbg_info *dbg;
1967         int      idx, i, arity = get_Phi_n_preds(phi);
1968         int      enq = 0;
1969
1970         idx = get_irn_idx(phi);
1971         if (env->entries[idx]->low_word) {
1972                 /* Phi nodes already build, check for inputs */
1973                 ir_node *phil = env->entries[idx]->low_word;
1974                 ir_node *phih = env->entries[idx]->high_word;
1975
1976                 for (i = 0; i < arity; ++i) {
1977                         ir_node *pred = get_Phi_pred(phi, i);
1978                         int     idx = get_irn_idx(pred);
1979
1980                         if (env->entries[idx]->low_word) {
1981                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
1982                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
1983                         } else {
1984                                 /* still not ready */
1985                                 pdeq_putr(env->waitq, phi);
1986                                 return;
1987                         }  /* if */
1988                 }  /* for */
1989         }  /* if */
1990
1991         /* first create a new in array */
1992         NEW_ARR_A(ir_node *, inl, arity);
1993         NEW_ARR_A(ir_node *, inh, arity);
1994         unk = new_r_Unknown(irg, mode);
1995
1996         for (i = 0; i < arity; ++i) {
1997                 ir_node *pred = get_Phi_pred(phi, i);
1998                 int     idx = get_irn_idx(pred);
1999
2000                 if (env->entries[idx]->low_word) {
2001                         inl[i] = env->entries[idx]->low_word;
2002                         inh[i] = env->entries[idx]->high_word;
2003                 } else {
2004                         inl[i] = unk;
2005                         inh[i] = unk;
2006                         enq = 1;
2007                 }  /* if */
2008         }  /* for */
2009
2010         dbg   = get_irn_dbg_info(phi);
2011         block = get_nodes_block(phi);
2012
2013         idx = get_irn_idx(phi);
2014         assert(idx < env->n_entries);
2015         env->entries[idx]->low_word  = new_rd_Phi(dbg, irg, block, arity, inl, mode);
2016         env->entries[idx]->high_word = new_rd_Phi(dbg, irg, block, arity, inh, mode);
2017
2018         if (enq) {
2019                 /* not yet finished */
2020                 pdeq_putr(env->waitq, phi);
2021         }  /* if */
2022 }  /* lower_Phi */
2023
2024 /**
2025  * check for opcodes that must always be lowered.
2026  */
2027 static int always_lower(opcode code) {
2028         switch (code) {
2029         case iro_Start:
2030         case iro_Call:
2031         case iro_Return:
2032         case iro_Cond:
2033                 return 1;
2034         default:
2035                 return 0;
2036         }  /* switch */
2037 }  /* always_lower */
2038
2039 /** The type of a lower function. */
2040 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2041
2042 /**
2043  * Lower a node.
2044  */
2045 static void lower_ops(ir_node *node, void *env)
2046 {
2047         lower_env_t  *lenv = env;
2048         node_entry_t *entry;
2049         int          idx = get_irn_idx(node);
2050
2051         entry = lenv->entries[idx];
2052         if (entry || always_lower(get_irn_opcode(node))) {
2053                 ir_op      *op = get_irn_op(node);
2054                 lower_func func = (lower_func)op->ops.generic;
2055
2056                 if (func) {
2057                         ir_mode *mode = get_irn_op_mode(node);
2058
2059                         if (mode == lenv->params->high_signed)
2060                                 mode = lenv->params->low_signed;
2061                         else
2062                                 mode = lenv->params->low_unsigned;
2063
2064                         DB((dbg, LEVEL_1, "  %+F\n", node));
2065                         func(node, mode, lenv);
2066                 }  /* if */
2067         }  /* if */
2068 }  /* lower_ops */
2069
2070 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2071
2072 /**
2073  * Compare two op_mode_entry_t's.
2074  */
2075 static int cmp_op_mode(const void *elt, const void *key, size_t size) {
2076         const op_mode_entry_t *e1 = elt;
2077         const op_mode_entry_t *e2 = key;
2078
2079         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2080 }  /* cmp_op_mode */
2081
2082 /**
2083  * Compare two conv_tp_entry_t's.
2084  */
2085 static int cmp_conv_tp(const void *elt, const void *key, size_t size) {
2086         const conv_tp_entry_t *e1 = elt;
2087         const conv_tp_entry_t *e2 = key;
2088
2089         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2090 }  /* static int cmp_conv_tp */
2091
2092 /*
2093  * Do the lowering.
2094  */
2095 void lower_dw_ops(const lwrdw_param_t *param)
2096 {
2097         lower_env_t lenv;
2098         int i;
2099         ir_graph *rem;
2100
2101         if (! param)
2102                 return;
2103
2104         if (! param->enable)
2105                 return;
2106
2107         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2108
2109         assert(2 * get_mode_size_bits(param->low_signed)   == get_mode_size_bits(param->high_signed));
2110         assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
2111         assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
2112
2113     /* create the necessary maps */
2114         if (! prim_types)
2115                 prim_types = pmap_create();
2116         if (! intrinsic_fkt)
2117                 intrinsic_fkt = new_set(cmp_op_mode, iro_MaxOpcode);
2118         if (! conv_types)
2119                 conv_types = new_set(cmp_conv_tp, 16);
2120         if (! lowered_type)
2121                 lowered_type = pmap_create();
2122
2123     /* create a primitive unsigned and signed type */
2124         if (! tp_u)
2125                 tp_u = get_primitive_type(param->low_unsigned);
2126         if (! tp_s)
2127                 tp_s = get_primitive_type(param->low_signed);
2128
2129     /* create method types for the created binop calls */
2130         if (! binop_tp_u) {
2131                 binop_tp_u = new_type_method(IDENT("binop_u_intrinsic"), 4, 2);
2132                 set_method_param_type(binop_tp_u, 0, tp_u);
2133                 set_method_param_type(binop_tp_u, 1, tp_u);
2134                 set_method_param_type(binop_tp_u, 2, tp_u);
2135                 set_method_param_type(binop_tp_u, 3, tp_u);
2136                 set_method_res_type(binop_tp_u, 0, tp_u);
2137                 set_method_res_type(binop_tp_u, 1, tp_u);
2138         }  /* if */
2139         if (! binop_tp_s) {
2140                 binop_tp_s = new_type_method(IDENT("binop_s_intrinsic"), 4, 2);
2141                 set_method_param_type(binop_tp_s, 0, tp_s);
2142                 set_method_param_type(binop_tp_s, 1, tp_s);
2143                 set_method_param_type(binop_tp_s, 2, tp_s);
2144                 set_method_param_type(binop_tp_s, 3, tp_s);
2145                 set_method_res_type(binop_tp_s, 0, tp_s);
2146                 set_method_res_type(binop_tp_s, 1, tp_s);
2147         }  /* if */
2148         if (! shiftop_tp_u) {
2149                 shiftop_tp_u = new_type_method(IDENT("shiftop_u_intrinsic"), 3, 2);
2150                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2151                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2152                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2153                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2154                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2155         }  /* if */
2156         if (! shiftop_tp_s) {
2157                 shiftop_tp_s = new_type_method(IDENT("shiftop_s_intrinsic"), 3, 2);
2158                 set_method_param_type(shiftop_tp_s, 0, tp_s);
2159                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2160                 /* beware: shift count is always mode_Iu */
2161                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2162                 set_method_res_type(shiftop_tp_s, 0, tp_s);
2163                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2164         }  /* if */
2165         if (! unop_tp_u) {
2166                 unop_tp_u = new_type_method(IDENT("unop_u_intrinsic"), 2, 2);
2167                 set_method_param_type(unop_tp_u, 0, tp_u);
2168                 set_method_param_type(unop_tp_u, 1, tp_u);
2169                 set_method_res_type(unop_tp_u, 0, tp_u);
2170                 set_method_res_type(unop_tp_u, 1, tp_u);
2171         }  /* if */
2172         if (! unop_tp_s) {
2173                 unop_tp_s = new_type_method(IDENT("unop_s_intrinsic"), 2, 2);
2174                 set_method_param_type(unop_tp_s, 0, tp_s);
2175                 set_method_param_type(unop_tp_s, 1, tp_s);
2176                 set_method_res_type(unop_tp_s, 0, tp_s);
2177                 set_method_res_type(unop_tp_s, 1, tp_s);
2178         }  /* if */
2179
2180         lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), mode_Iu);
2181         lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), mode_Iu);
2182         lenv.waitq         = new_pdeq();
2183         lenv.params        = param;
2184
2185         /* first clear the generic function pointer for all ops */
2186         clear_irp_opcodes_generic_func();
2187
2188 #define LOWER2(op, fkt)   op_##op->ops.generic = (op_func)fkt
2189 #define LOWER(op)         LOWER2(op, lower_##op)
2190 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2191 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2192
2193     /* the table of all operations that must be lowered follows */
2194         LOWER(Load);
2195         LOWER(Store);
2196         LOWER(Const);
2197         LOWER(And);
2198         LOWER(Or);
2199         LOWER(Eor);
2200         LOWER(Not);
2201         LOWER(Cond);
2202         LOWER(Return);
2203         LOWER(Call);
2204         LOWER(Unknown);
2205         LOWER(Phi);
2206         LOWER(Start);
2207
2208         LOWER_BIN(Add);
2209         LOWER_BIN(Sub);
2210         LOWER_BIN(Mul);
2211         LOWER(Shl);
2212         LOWER(Shr);
2213         LOWER(Shrs);
2214         LOWER(Rot);
2215         LOWER_UN(Minus);
2216         LOWER(DivMod);
2217         LOWER(Div);
2218         LOWER(Mod);
2219         LOWER_UN(Abs);
2220
2221         LOWER(Conv);
2222
2223 #undef LOWER_UN
2224 #undef LOWER_BIN
2225 #undef LOWER
2226 #undef LOWER2
2227
2228         /* transform all graphs */
2229         rem = current_ir_graph;
2230         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2231                 ir_graph *irg = get_irp_irg(i);
2232                 int n_idx;
2233
2234                 obstack_init(&lenv.obst);
2235
2236                 n_idx = get_irg_last_idx(irg);
2237                 lenv.n_entries = n_idx;
2238                 lenv.entries   = xmalloc(n_idx * sizeof(lenv.entries[0]));
2239                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2240
2241                 /* first step: link all nodes and allocate data */
2242                 lenv.flags = 0;
2243                 lenv.proj_2_block = pmap_create();
2244                 irg_walk_graph(irg, firm_clear_link, prepare_links, &lenv);
2245
2246                 if (lenv.flags & MUST_BE_LOWERED) {
2247                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2248
2249                         /* must do some work */
2250                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2251
2252                         /* last step: all waiting nodes */
2253                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2254                         current_ir_graph = irg;
2255                         while (! pdeq_empty(lenv.waitq)) {
2256                                 ir_node *node = pdeq_getl(lenv.waitq);
2257
2258                                 lower_ops(node, &lenv);
2259                         }  /* while */
2260
2261                         /* outs are invalid, we changed the graph */
2262                         set_irg_outs_inconsistent(irg);
2263
2264                         if (lenv.flags & CF_CHANGED) {
2265                                 /* control flow changed, dominance info is invalid */
2266                                 set_irg_doms_inconsistent(irg);
2267                                 set_irg_extblk_inconsistent(irg);
2268                                 set_irg_loopinfo_inconsistent(irg);
2269                         }  /* if */
2270
2271                         dump_ir_block_graph(irg, "-dw");
2272                 }  /* if */
2273                 pmap_destroy(lenv.proj_2_block);
2274                 free(lenv.entries);
2275                 obstack_free(&lenv.obst, NULL);
2276         }  /* for */
2277         del_pdeq(lenv.waitq);
2278         current_ir_graph = rem;
2279 }  /* lower_dw_ops */
2280
2281 /* Default implementation. */
2282 entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2283                                  const ir_mode *imode, const ir_mode *omode,
2284                                  void *context)
2285 {
2286         char buf[64];
2287         ident *id;
2288         entity *ent;
2289
2290         if (imode == omode) {
2291                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2292         } else {
2293                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2294                         get_mode_name(imode), get_mode_name(omode));
2295         }  /* if */
2296         id = new_id_from_str(buf);
2297
2298         ent = new_entity(get_glob_type(), id, method);
2299         set_entity_ld_ident(ent, get_entity_ident(ent));
2300         set_entity_visibility(ent, visibility_external_allocated);
2301         return ent;
2302 }  /* def_create_intrinsic_fkt */