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 but don't need a link */
 288                         lenv->flags |= MUST_BE_LOWERED;
 289                 }  /* if */
 290                 return;
 291         }  /* if */
 292
 293         if (is_Proj(node)) {
 294                 /* link all Proj nodes to its predecessor:
 295                    Note that Tuple Proj's and its Projs are linked either. */
 296                 ir_node *pred = get_Proj_pred(node);
 297
 298                 set_irn_link(node, get_irn_link(pred));
 299                 set_irn_link(pred, node);
 300         } else if (is_Phi(node)) {
 301                 /* link all Phi nodes to its block */
 302                 ir_node *block = get_nodes_block(node);
 303
 304                 set_irn_link(node, get_irn_link(block));
 305                 set_irn_link(block, node);
 306         } else if (is_Block(node)) {
 307                 /* fill the Proj -> Block map */
 308                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 309                         ir_node *pred = get_Block_cfgpred(node, i);
 310
 311                         if (is_Proj(pred))
 312                                 pmap_insert(lenv->proj_2_block, pred, node);
 313                 }  /* for */
 314         }  /* if */
 315 }  /* prepare_links */
 316
 317 /**
 318  * Translate a Constant: create two.
 319  */
 320 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env) {
 321         tarval   *tv, *tv_l, *tv_h;
 322         ir_node  *low, *high;
 323         dbg_info *dbg = get_irn_dbg_info(node);
 324         ir_node  *block = get_nodes_block(node);
 325         int      idx;
 326         ir_graph *irg = current_ir_graph;
 327
 328         tv   = get_Const_tarval(node);
 329
 330         tv_l = tarval_convert_to(tv, mode);
 331         low  = new_rd_Const(dbg, irg, block, mode, tv_l);
 332
 333         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 334         high = new_rd_Const(dbg, irg, block, mode, tv_h);
 335
 336         idx = get_irn_idx(node);
 337         assert(idx < env->n_entries);
 338         env->entries[idx]->low_word  = low;
 339         env->entries[idx]->high_word = high;
 340 }  /* lower_Const */
 341
 342 /**
 343  * Translate a Load: create two.
 344  */
 345 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env) {
 346         ir_graph *irg = current_ir_graph;
 347         ir_node  *adr = get_Load_ptr(node);
 348         ir_node  *mem = get_Load_mem(node);
 349         ir_node  *low, *high, *proj;
 350         dbg_info *dbg;
 351         ir_node  *block = get_nodes_block(node);
 352         int      idx;
 353
 354         if (env->params->little_endian) {
 355                 low  = adr;
 356                 high = new_r_Add(irg, block, adr,
 357                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 358                         get_irn_mode(adr));
 359         } else {
 360                 low  = new_r_Add(irg, block, adr,
 361                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 362                         get_irn_mode(adr));
 363                 high = adr;
 364         }  /* if */
 365
 366         /* create two loads */
 367         dbg  = get_irn_dbg_info(node);
 368         low  = new_rd_Load(dbg, irg, block, mem, low,  mode);
 369         proj = new_r_Proj(irg, block, low, mode_M, pn_Load_M);
 370         high = new_rd_Load(dbg, irg, block, proj, high, mode);
 371
 372         set_Load_volatility(low,  get_Load_volatility(node));
 373         set_Load_volatility(high, get_Load_volatility(node));
 374
 375         idx = get_irn_idx(node);
 376         assert(idx < env->n_entries);
 377         env->entries[idx]->low_word  = low;
 378         env->entries[idx]->high_word = high;
 379
 380         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 381                 idx = get_irn_idx(proj);
 382
 383                 switch (get_Proj_proj(proj)) {
 384                 case pn_Load_M:         /* Memory result. */
 385                         /* put it to the second one */
 386                         set_Proj_pred(proj, high);
 387                         break;
 388                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 389                         /* put it to the first one */
 390                         set_Proj_pred(proj, low);
 391                         break;
 392                 case pn_Load_res:       /* Result of load operation. */
 393                         assert(idx < env->n_entries);
 394                         env->entries[idx]->low_word  = new_r_Proj(irg, block, low, mode, pn_Load_res);
 395                         env->entries[idx]->high_word = new_r_Proj(irg, block, high, mode, pn_Load_res);
 396                         break;
 397                 default:
 398                         assert(0 && "unexpected Proj number");
 399                 }  /* switch */
 400                 /* mark this proj: we have handled it already, otherwise we might fall into
 401                  * out new nodes. */
 402                 mark_irn_visited(proj);
 403         }  /* for */
 404 }  /* lower_Load */
 405
 406 /**
 407  * Translate a Store: create two.
 408  */
 409 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env) {
 410         ir_graph *irg;
 411         ir_node  *block, *adr, *mem;
 412         ir_node  *low, *high, *irn, *proj;
 413         dbg_info *dbg;
 414         int      idx;
 415         node_entry_t *entry;
 416
 417         irn = get_Store_value(node);
 418         entry = env->entries[get_irn_idx(irn)];
 419         assert(entry);
 420
 421         if (! entry->low_word) {
 422                 /* not ready yet, wait */
 423                 pdeq_putr(env->waitq, node);
 424                 return;
 425         }  /* if */
 426
 427         irg = current_ir_graph;
 428         adr = get_Store_ptr(node);
 429         mem = get_Store_mem(node);
 430         block = get_nodes_block(node);
 431
 432         if (env->params->little_endian) {
 433                 low  = adr;
 434                 high = new_r_Add(irg, block, adr,
 435                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 436                         get_irn_mode(adr));
 437         } else {
 438                 low  = new_r_Add(irg, block, adr,
 439                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 440                         get_irn_mode(adr));
 441                 high = adr;
 442         }  /* if */
 443
 444         /* create two Stores */
 445         dbg = get_irn_dbg_info(node);
 446         low  = new_rd_Store(dbg, irg, block, mem, low,  entry->low_word);
 447         proj = new_r_Proj(irg, block, low, mode_M, pn_Store_M);
 448         high = new_rd_Store(dbg, irg, block, proj, high, entry->high_word);
 449
 450         set_Store_volatility(low,  get_Store_volatility(node));
 451         set_Store_volatility(high, get_Store_volatility(node));
 452
 453         idx = get_irn_idx(node);
 454         assert(idx < env->n_entries);
 455         env->entries[idx]->low_word  = low;
 456         env->entries[idx]->high_word = high;
 457
 458         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 459                 idx = get_irn_idx(proj);
 460
 461                 switch (get_Proj_proj(proj)) {
 462                 case pn_Store_M:         /* Memory result. */
 463                         /* put it to the second one */
 464                         set_Proj_pred(proj, high);
 465                         break;
 466                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 467                         /* put it to the first one */
 468                         set_Proj_pred(proj, low);
 469                         break;
 470                 default:
 471                         assert(0 && "unexpected Proj number");
 472                 }  /* switch */
 473                 /* mark this proj: we have handled it already, otherwise we might fall into
 474                  * out new nodes. */
 475                 mark_irn_visited(proj);
 476         }  /* for */
 477 }  /* lower_Store */
 478
 479 /**
 480  * Return a node containing the address of the intrinsic emulation function.
 481  *
 482  * @param method  the method type of the emulation function
 483  * @param op      the emulated ir_op
 484  * @param imode   the input mode of the emulated opcode
 485  * @param omode   the output mode of the emulated opcode
 486  * @param block   where the new mode is created
 487  * @param env     the lower environment
 488  */
 489 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 490                                       ir_mode *imode, ir_mode *omode,
 491                                       ir_node *block, lower_env_t *env) {
 492         symconst_symbol sym;
 493         entity *ent;
 494         op_mode_entry_t key, *entry;
 495
 496         key.op    = op;
 497         key.imode = imode;
 498         key.omode = omode;
 499         key.ent   = NULL;
 500
 501         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 502                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 503         if (! entry->ent) {
 504                 /* create a new one */
 505                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 506
 507                 assert(ent && "Intrinsic creator must return an entity");
 508                 entry->ent = ent;
 509         } else {
 510                 ent = entry->ent;
 511         }  /* if */
 512         sym.entity_p = ent;
 513         return new_r_SymConst(current_ir_graph, block, sym, symconst_addr_ent);
 514 }  /* get_intrinsic_address */
 515
 516 /**
 517  * Translate a Div.
 518  *
 519  * Create an intrinsic Call.
 520  */
 521 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env) {
 522         ir_node  *block, *irn, *call, *proj;
 523         ir_node  *in[4];
 524         ir_mode  *opmode;
 525         dbg_info *dbg;
 526         ir_type  *mtp;
 527         int      idx;
 528         ir_graph *irg;
 529         node_entry_t *entry;
 530
 531         irn   = get_Div_left(node);
 532         entry = env->entries[get_irn_idx(irn)];
 533         assert(entry);
 534
 535         if (! entry->low_word) {
 536                 /* not ready yet, wait */
 537                 pdeq_putr(env->waitq, node);
 538                 return;
 539         }  /* if */
 540
 541         in[0] = entry->low_word;
 542         in[1] = entry->high_word;
 543
 544         irn   = get_Div_right(node);
 545         entry = env->entries[get_irn_idx(irn)];
 546         assert(entry);
 547
 548         if (! entry->low_word) {
 549                 /* not ready yet, wait */
 550                 pdeq_putr(env->waitq, node);
 551                 return;
 552         }  /* if */
 553
 554         in[2] = entry->low_word;
 555         in[3] = entry->high_word;
 556
 557         dbg   = get_irn_dbg_info(node);
 558         block = get_nodes_block(node);
 559         irg   = current_ir_graph;
 560
 561         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 562         opmode = get_irn_op_mode(node);
 563         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, block, env);
 564         call = new_rd_Call(dbg, irg, block, get_Div_mem(node),
 565                 irn, 4, in, mtp);
 566         set_irn_pinned(call, get_irn_pinned(node));
 567         irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 568
 569         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 570                 switch (get_Proj_proj(proj)) {
 571                 case pn_Div_M:         /* Memory result. */
 572                         /* reroute to the call */
 573                         set_Proj_pred(proj, call);
 574                         set_Proj_proj(proj, pn_Call_M_except);
 575                         break;
 576                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 577                         /* reroute to the call */
 578                         set_Proj_pred(proj, call);
 579                         set_Proj_proj(proj, pn_Call_X_except);
 580                         break;
 581                 case pn_Div_res:       /* Result of computation. */
 582                         idx = get_irn_idx(proj);
 583                         assert(idx < env->n_entries);
 584                         env->entries[idx]->low_word  = new_r_Proj(current_ir_graph, block, irn, mode, 0);
 585                         env->entries[idx]->high_word = new_r_Proj(current_ir_graph, block, irn, mode, 1);
 586                         break;
 587                 default:
 588                         assert(0 && "unexpected Proj number");
 589                 }  /* switch */
 590                 /* mark this proj: we have handled it already, otherwise we might fall into
 591                  * out new nodes. */
 592                 mark_irn_visited(proj);
 593         }  /* for */
 594 }  /* lower_Div */
 595
 596 /**
 597  * Translate a Mod.
 598  *
 599  * Create an intrinsic Call.
 600  */
 601 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 602         ir_node  *block, *proj, *irn, *call;
 603         ir_node  *in[4];
 604         ir_mode  *opmode;
 605         dbg_info *dbg;
 606         ir_type  *mtp;
 607         int      idx;
 608         ir_graph *irg;
 609         node_entry_t *entry;
 610
 611         irn   = get_Mod_left(node);
 612         entry = env->entries[get_irn_idx(irn)];
 613         assert(entry);
 614
 615         if (! entry->low_word) {
 616                 /* not ready yet, wait */
 617                 pdeq_putr(env->waitq, node);
 618                 return;
 619         }  /* if */
 620
 621         in[0] = entry->low_word;
 622         in[1] = entry->high_word;
 623
 624         irn   = get_Mod_right(node);
 625         entry = env->entries[get_irn_idx(irn)];
 626         assert(entry);
 627
 628         if (! entry->low_word) {
 629                 /* not ready yet, wait */
 630                 pdeq_putr(env->waitq, node);
 631                 return;
 632         }  /* if */
 633
 634         in[2] = entry->low_word;
 635         in[3] = entry->high_word;
 636
 637         dbg   = get_irn_dbg_info(node);
 638         block = get_nodes_block(node);
 639         irg   = current_ir_graph;
 640
 641         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 642         opmode = get_irn_op_mode(node);
 643         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, block, env);
 644         call = new_rd_Call(dbg, irg, block, get_Mod_mem(node),
 645                 irn, 4, in, mtp);
 646         set_irn_pinned(call, get_irn_pinned(node));
 647         irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 648
 649         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 650                 switch (get_Proj_proj(proj)) {
 651                 case pn_Mod_M:         /* Memory result. */
 652                         /* reroute to the call */
 653                         set_Proj_pred(proj, call);
 654                         set_Proj_proj(proj, pn_Call_M_except);
 655                         break;
 656                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 657                         /* reroute to the call */
 658                         set_Proj_pred(proj, call);
 659                         set_Proj_proj(proj, pn_Call_X_except);
 660                         break;
 661                 case pn_Mod_res:       /* Result of computation. */
 662                         idx = get_irn_idx(proj);
 663                         assert(idx < env->n_entries);
 664                         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
 665                         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
 666                         break;
 667                 default:
 668                         assert(0 && "unexpected Proj number");
 669                 }  /* switch */
 670                 /* mark this proj: we have handled it already, otherwise we might fall into
 671                  * out new nodes. */
 672                 mark_irn_visited(proj);
 673         }  /* for */
 674 }  /* lower_Mod */
 675
 676 /**
 677  * Translate a DivMod.
 678  *
 679  * Create two intrinsic Calls.
 680  */
 681 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 682         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod, *resDiv, *resMod;
 683         ir_node  *in[4];
 684         ir_mode  *opmode;
 685         dbg_info *dbg;
 686         ir_type  *mtp;
 687         int      idx;
 688         node_entry_t *entry;
 689         unsigned flags = 0;
 690         ir_graph *irg;
 691
 692         /* check if both results are needed */
 693         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 694                 switch (get_Proj_proj(proj)) {
 695                 case pn_DivMod_res_div: flags |= 1; break;
 696                 case pn_DivMod_res_mod: flags |= 2; break;
 697                 default: break;
 698                 }  /* switch */
 699         }  /* for */
 700
 701         irn   = get_DivMod_left(node);
 702         entry = env->entries[get_irn_idx(irn)];
 703         assert(entry);
 704
 705         if (! entry->low_word) {
 706                 /* not ready yet, wait */
 707                 pdeq_putr(env->waitq, node);
 708                 return;
 709         }  /* if */
 710
 711         in[0] = entry->low_word;
 712         in[1] = entry->high_word;
 713
 714         irn   = get_DivMod_right(node);
 715         entry = env->entries[get_irn_idx(irn)];
 716         assert(entry);
 717
 718         if (! entry->low_word) {
 719                 /* not ready yet, wait */
 720                 pdeq_putr(env->waitq, node);
 721                 return;
 722         }  /* if */
 723
 724         in[2] = entry->low_word;
 725         in[3] = entry->high_word;
 726
 727         dbg   = get_irn_dbg_info(node);
 728         block = get_nodes_block(node);
 729         irg   = current_ir_graph;
 730
 731         mem = get_DivMod_mem(node);
 732
 733         callDiv = callMod = NULL;
 734         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 735         if (flags & 1) {
 736                 opmode = get_irn_op_mode(node);
 737                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, block, env);
 738                 callDiv = new_rd_Call(dbg, irg, block, mem,
 739                         irn, 4, in, mtp);
 740                 set_irn_pinned(callDiv, get_irn_pinned(node));
 741                 resDiv = new_r_Proj(irg, block, callDiv, mode_T, pn_Call_T_result);
 742         }  /* if */
 743         if (flags & 2) {
 744                 if (flags & 1)
 745                         mem = new_r_Proj(irg, block, callDiv, mode_M, pn_Call_M);
 746                 opmode = get_irn_op_mode(node);
 747                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, block, env);
 748                 callMod = new_rd_Call(dbg, irg, block, mem,
 749                         irn, 4, in, mtp);
 750                 set_irn_pinned(callMod, get_irn_pinned(node));
 751                 resMod = new_r_Proj(irg, block, callMod, mode_T, pn_Call_T_result);
 752         }  /* if */
 753
 754         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 755                 switch (get_Proj_proj(proj)) {
 756                 case pn_DivMod_M:         /* Memory result. */
 757                         /* reroute to the first call */
 758                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 759                         set_Proj_proj(proj, pn_Call_M_except);
 760                         break;
 761                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 762                         /* reroute to the first call */
 763                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 764                         set_Proj_proj(proj, pn_Call_X_except);
 765                         break;
 766                 case pn_DivMod_res_div:   /* Result of Div. */
 767                         idx = get_irn_idx(proj);
 768                         assert(idx < env->n_entries);
 769                         env->entries[idx]->low_word  = new_r_Proj(irg, block, resDiv, mode, 0);
 770                         env->entries[idx]->high_word = new_r_Proj(irg, block, resDiv, mode, 1);
 771                         break;
 772                 case pn_DivMod_res_mod:   /* Result of Mod. */
 773                         idx = get_irn_idx(proj);
 774                         env->entries[idx]->low_word  = new_r_Proj(irg, block, resMod, mode, 0);
 775                         env->entries[idx]->high_word = new_r_Proj(irg, block, resMod, mode, 1);
 776                         break;
 777                 default:
 778                         assert(0 && "unexpected Proj number");
 779                 }  /* switch */
 780                 /* mark this proj: we have handled it already, otherwise we might fall into
 781                  * out new nodes. */
 782                 mark_irn_visited(proj);
 783         }  /* for */
 784 }  /* lower_DivMod */
 785
 786 /**
 787  * Translate a Binop.
 788  *
 789  * Create an intrinsic Call.
 790  */
 791 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 792         ir_node  *block, *irn;
 793         ir_node  *in[4];
 794         dbg_info *dbg;
 795         ir_type  *mtp;
 796         int      idx;
 797         ir_graph *irg;
 798         node_entry_t *entry;
 799
 800         irn   = get_binop_left(node);
 801         entry = env->entries[get_irn_idx(irn)];
 802         assert(entry);
 803
 804         if (! entry->low_word) {
 805                 /* not ready yet, wait */
 806                 pdeq_putr(env->waitq, node);
 807                 return;
 808         }  /* if */
 809
 810         in[0] = entry->low_word;
 811         in[1] = entry->high_word;
 812
 813         irn   = get_binop_right(node);
 814         entry = env->entries[get_irn_idx(irn)];
 815         assert(entry);
 816
 817         if (! entry->low_word) {
 818                 /* not ready yet, wait */
 819                 pdeq_putr(env->waitq, node);
 820                 return;
 821         }  /* if */
 822
 823         in[2] = entry->low_word;
 824         in[3] = entry->high_word;
 825
 826         dbg   = get_irn_dbg_info(node);
 827         block = get_nodes_block(node);
 828         irg   = current_ir_graph;
 829
 830         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 831         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
 832         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
 833                 irn, 4, in, mtp);
 834         set_irn_pinned(irn, get_irn_pinned(node));
 835         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
 836
 837         idx = get_irn_idx(node);
 838         assert(idx < env->n_entries);
 839         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
 840         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
 841 }  /* lower_Binop */
 842
 843 /**
 844  * Translate a Shiftop.
 845  *
 846  * Create an intrinsic Call.
 847  */
 848 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 849         ir_node  *block, *irn;
 850         ir_node  *in[3];
 851         dbg_info *dbg;
 852         ir_type  *mtp;
 853         int      idx;
 854         ir_graph *irg;
 855         node_entry_t *entry;
 856
 857         irn   = get_binop_left(node);
 858         entry = env->entries[get_irn_idx(irn)];
 859         assert(entry);
 860
 861         if (! entry->low_word) {
 862                 /* not ready yet, wait */
 863                 pdeq_putr(env->waitq, node);
 864                 return;
 865         }  /* if */
 866
 867         in[0] = entry->low_word;
 868         in[1] = entry->high_word;
 869
 870         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 871         in[2] = get_binop_right(node);
 872
 873         dbg   = get_irn_dbg_info(node);
 874         block = get_nodes_block(node);
 875         irg  = current_ir_graph;
 876
 877         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 878         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
 879         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
 880                 irn, 3, in, mtp);
 881         set_irn_pinned(irn, get_irn_pinned(node));
 882         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
 883
 884         idx = get_irn_idx(node);
 885         assert(idx < env->n_entries);
 886         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
 887         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
 888 }  /* lower_Shiftop */
 889
 890 /**
 891  * Translate a Shr and handle special cases.
 892  */
 893 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env) {
 894         ir_node  *right = get_Shr_right(node);
 895         ir_graph *irg = current_ir_graph;
 896
 897         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 898                 tarval *tv = get_Const_tarval(right);
 899
 900                 if (tarval_is_long(tv) &&
 901                         get_tarval_long(tv) >= get_mode_size_bits(mode)) {
 902                         ir_node *block = get_nodes_block(node);
 903                         ir_node *left = get_Shr_left(node);
 904                         ir_node *c;
 905                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 906                         int idx = get_irn_idx(left);
 907
 908                         left = env->entries[idx]->high_word;
 909                         idx = get_irn_idx(node);
 910
 911                         if (shf_cnt > 0) {
 912                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
 913                                 env->entries[idx]->low_word = new_r_Shr(irg, block, left, c, mode);
 914                         } else {
 915                                 env->entries[idx]->low_word = left;
 916                         }  /* if */
 917                         env->entries[idx]->high_word = new_r_Const(irg, block, mode, get_mode_null(mode));
 918
 919                         return;
 920                 }  /* if */
 921         }  /* if */
 922         lower_Shiftop(node, mode, env);
 923 }  /* lower_Shr */
 924
 925 /**
 926  * Translate a Shl and handle special cases.
 927  */
 928 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env) {
 929         ir_node  *right = get_Shl_right(node);
 930         ir_graph *irg = current_ir_graph;
 931
 932         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 933                 tarval *tv = get_Const_tarval(right);
 934
 935                 if (tarval_is_long(tv) &&
 936                         get_tarval_long(tv) >= get_mode_size_bits(mode)) {
 937                         ir_node *block = get_nodes_block(node);
 938                         ir_node *left = get_Shl_left(node);
 939                         ir_node *c;
 940                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 941                         int idx = get_irn_idx(left);
 942
 943                         left = env->entries[idx]->low_word;
 944                         idx = get_irn_idx(node);
 945
 946                         if (shf_cnt > 0) {
 947                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
 948                                 env->entries[idx]->high_word = new_r_Shl(irg, block, left, c, mode);
 949                         } else {
 950                                 env->entries[idx]->high_word = left;
 951                         }  /* if */
 952                         env->entries[idx]->low_word  = new_r_Const(irg, block, mode, get_mode_null(mode));
 953
 954                         return;
 955                 }  /* if */
 956         }  /* if */
 957         lower_Shiftop(node, mode, env);
 958 }  /* lower_Shl */
 959
 960 /**
 961  * Translate a Shrs and handle special cases.
 962  */
 963 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env) {
 964         ir_node  *right = get_Shrs_right(node);
 965         ir_graph *irg = current_ir_graph;
 966
 967         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 968                 tarval *tv = get_Const_tarval(right);
 969
 970                 if (tarval_is_long(tv) &&
 971                         get_tarval_long(tv) >= get_mode_size_bits(mode)) {
 972                         ir_node *block = get_nodes_block(node);
 973                         ir_node *left = get_Shrs_left(node);
 974                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 975                         ir_node *c;
 976                         int idx = get_irn_idx(left);
 977
 978                         left = env->entries[idx]->high_word;
 979                         idx = get_irn_idx(node);
 980
 981                         if (shf_cnt > 0) {
 982                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
 983                                 env->entries[idx]->low_word = new_r_Shrs(irg, block, left, c, mode);
 984                         } else {
 985                                 env->entries[idx]->low_word = left;
 986                         }  /* if */
 987                         c = new_r_Const_long(irg, block, mode_Iu, get_mode_size_bits(mode) - 1);
 988                         env->entries[idx]->high_word = new_r_Shrs(irg, block, left, c, mode);
 989
 990                         return;
 991                 }  /* if */
 992         }  /* if */
 993         lower_Shiftop(node, mode, env);
 994 }  /* lower_Shrs */
 995
 996 /**
 997  * Translate a Rot and handle special cases.
 998  */
 999 static void lower_Rot(ir_node *node, ir_mode *mode, lower_env_t *env) {
1000         ir_node  *right = get_Rot_right(node);
1001
1002         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1003                 tarval *tv = get_Const_tarval(right);
1004
1005                 if (tarval_is_long(tv) &&
1006                         get_tarval_long(tv) == get_mode_size_bits(mode)) {
1007                         ir_node *left = get_Rot_left(node);
1008                         ir_node *h, *l;
1009                         int idx = get_irn_idx(left);
1010
1011                         l = env->entries[idx]->low_word;
1012                         h = env->entries[idx]->high_word;
1013                         idx = get_irn_idx(node);
1014
1015                         env->entries[idx]->low_word  = h;
1016                         env->entries[idx]->high_word = l;
1017
1018                         return;
1019                 }  /* if */
1020         }  /* if */
1021         lower_Shiftop(node, mode, env);
1022 }  /* lower_Rot */
1023
1024 /**
1025  * Translate an Unop.
1026  *
1027  * Create an intrinsic Call.
1028  */
1029 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env) {
1030         ir_node  *block, *irn;
1031         ir_node  *in[2];
1032         dbg_info *dbg;
1033         ir_type  *mtp;
1034         int      idx;
1035         ir_graph *irg;
1036         node_entry_t *entry;
1037
1038         irn   = get_unop_op(node);
1039         entry = env->entries[get_irn_idx(irn)];
1040         assert(entry);
1041
1042         if (! entry->low_word) {
1043                 /* not ready yet, wait */
1044                 pdeq_putr(env->waitq, node);
1045                 return;
1046         }  /* if */
1047
1048         in[0] = entry->low_word;
1049         in[1] = entry->high_word;
1050
1051         dbg   = get_irn_dbg_info(node);
1052         block = get_nodes_block(node);
1053         irg   = current_ir_graph;
1054
1055         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1056         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
1057         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
1058                 irn, 2, in, mtp);
1059         set_irn_pinned(irn, get_irn_pinned(node));
1060         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
1061
1062         idx = get_irn_idx(node);
1063         assert(idx < env->n_entries);
1064         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
1065         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
1066 }  /* lower_Unop */
1067
1068 /**
1069  * Translate a logical Binop.
1070  *
1071  * Create two logical Binops.
1072  */
1073 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1074                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_graph *irg, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1075         ir_node  *block, *irn;
1076         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1077         dbg_info *dbg;
1078         int      idx;
1079         ir_graph *irg;
1080         node_entry_t *entry;
1081
1082         irn   = get_binop_left(node);
1083         entry = env->entries[get_irn_idx(irn)];
1084         assert(entry);
1085
1086         if (! entry->low_word) {
1087                 /* not ready yet, wait */
1088                 pdeq_putr(env->waitq, node);
1089                 return;
1090         }  /* if */
1091
1092         lop_l = entry->low_word;
1093         lop_h = entry->high_word;
1094
1095         irn   = get_binop_right(node);
1096         entry = env->entries[get_irn_idx(irn)];
1097         assert(entry);
1098
1099         if (! entry->low_word) {
1100                 /* not ready yet, wait */
1101                 pdeq_putr(env->waitq, node);
1102                 return;
1103         }  /* if */
1104
1105         rop_l = entry->low_word;
1106         rop_h = entry->high_word;
1107
1108         dbg = get_irn_dbg_info(node);
1109         block = get_nodes_block(node);
1110
1111         idx = get_irn_idx(node);
1112         assert(idx < env->n_entries);
1113         irg = current_ir_graph;
1114         env->entries[idx]->low_word  = constr_rd(dbg, irg, block, lop_l, rop_l, mode);
1115         env->entries[idx]->high_word = constr_rd(dbg, irg, block, lop_h, rop_h, mode);
1116 }  /* lower_Binop_logical */
1117
1118 /** create a logical operation tranformation */
1119 #define lower_logical(op)                                                \
1120 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1121         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1122 }
1123
1124 lower_logical(And)
1125 lower_logical(Or)
1126 lower_logical(Eor)
1127
1128 /**
1129  * Translate a Not.
1130  *
1131  * Create two logical Nots.
1132  */
1133 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env) {
1134         ir_node  *block, *irn;
1135         ir_node  *op_l, *op_h;
1136         dbg_info *dbg;
1137         int      idx;
1138         ir_graph *irg;
1139         node_entry_t *entry;
1140
1141         irn   = get_Not_op(node);
1142         entry = env->entries[get_irn_idx(irn)];
1143         assert(entry);
1144
1145         if (! entry->low_word) {
1146                 /* not ready yet, wait */
1147                 pdeq_putr(env->waitq, node);
1148                 return;
1149         }  /* if */
1150
1151         op_l = entry->low_word;
1152         op_h = entry->high_word;
1153
1154         dbg   = get_irn_dbg_info(node);
1155         block = get_nodes_block(node);
1156         irg   = current_ir_graph;
1157
1158         idx = get_irn_idx(node);
1159         assert(idx < env->n_entries);
1160         env->entries[idx]->low_word  = new_rd_Not(dbg, current_ir_graph, block, op_l, mode);
1161         env->entries[idx]->high_word = new_rd_Not(dbg, current_ir_graph, block, op_h, mode);
1162 }  /* lower_Not */
1163
1164 /**
1165  * Translate a Cond.
1166  */
1167 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
1168         ir_node *cmp, *left, *right, *block;
1169         ir_node *sel = get_Cond_selector(node);
1170         ir_mode *m = get_irn_mode(sel);
1171         int     idx;
1172
1173         if (m == mode_b) {
1174                 node_entry_t *lentry, *rentry;
1175                 ir_node  *proj, *projT = NULL, *projF = NULL;
1176                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1177                 ir_node  *projHF, *projHT;
1178                 ir_node  *dst_blk;
1179                 ir_graph *irg;
1180                 pn_Cmp   pnc;
1181                 dbg_info *dbg;
1182
1183                 cmp   = get_Proj_pred(sel);
1184                 left  = get_Cmp_left(cmp);
1185                 idx   = get_irn_idx(left);
1186                 lentry = env->entries[idx];
1187
1188                 if (! lentry) {
1189                         /* a normal Cmp */
1190                         return;
1191                 }  /* if */
1192
1193                 right = get_Cmp_right(cmp);
1194                 idx   = get_irn_idx(right);
1195                 rentry = env->entries[idx];
1196                 assert(rentry);
1197
1198                 if (! lentry->low_word || !rentry->low_word) {
1199                         /* not yet ready */
1200                         pdeq_putr(env->waitq, node);
1201                         return;
1202                 }  /* if */
1203
1204                 /* all right, build the code */
1205                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1206                         long proj_nr = get_Proj_proj(proj);
1207
1208                         if (proj_nr == pn_Cond_true) {
1209                                 assert(projT == NULL && "more than one Proj(true)");
1210                                 projT = proj;
1211                         } else {
1212                                 assert(proj_nr == pn_Cond_false);
1213                                 assert(projF == NULL && "more than one Proj(false)");
1214                                 projF = proj;
1215                         }  /* if */
1216                         mark_irn_visited(proj);
1217                 }  /* for */
1218                 assert(projT && projF);
1219
1220                 /* create a new high compare */
1221                 block = get_nodes_block(cmp);
1222                 dbg   = get_irn_dbg_info(cmp);
1223                 irg   = current_ir_graph;
1224
1225                 cmpH = new_rd_Cmp(dbg, irg, block, lentry->high_word, rentry->high_word);
1226
1227                 pnc = get_Proj_proj(sel);
1228                 if (pnc == pn_Cmp_Eq) {
1229                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1230                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1231
1232                         assert(entry);
1233                         dst_blk = entry->value;
1234
1235                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Eq);
1236                         dbg = get_irn_dbg_info(node);
1237                         irn = new_rd_Cond(dbg, irg, block, irn);
1238
1239                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1240                         mark_irn_visited(projHF);
1241                         exchange(projF, projHF);
1242
1243                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1244                         mark_irn_visited(projHT);
1245
1246                         new_bl = new_r_Block(irg, 1, &projHT);
1247
1248                         dbg   = get_irn_dbg_info(cmp);
1249                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1250                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Eq);
1251                         dbg = get_irn_dbg_info(node);
1252                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1253
1254                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1255                         mark_irn_visited(proj);
1256                         add_block_cf_input(dst_blk, projHF, proj);
1257
1258                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1259                         mark_irn_visited(proj);
1260                         exchange(projT, proj);
1261                 } else if (pnc == pn_Cmp_Lg) {
1262                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1263                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1264
1265                         assert(entry);
1266                         dst_blk = entry->value;
1267
1268                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Lg);
1269                         dbg = get_irn_dbg_info(node);
1270                         irn = new_rd_Cond(dbg, irg, block, irn);
1271
1272                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1273                         mark_irn_visited(projHT);
1274                         exchange(projT, projHT);
1275
1276                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1277                         mark_irn_visited(projHF);
1278
1279                         new_bl = new_r_Block(irg, 1, &projHF);
1280
1281                         dbg   = get_irn_dbg_info(cmp);
1282                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1283                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Lg);
1284                         dbg = get_irn_dbg_info(node);
1285                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1286
1287                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1288                         mark_irn_visited(proj);
1289                         add_block_cf_input(dst_blk, projHT, proj);
1290
1291                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1292                         mark_irn_visited(proj);
1293                         exchange(projF, proj);
1294                 } else {
1295                         /* a rel b <==> a_h rel b_h || (a_h == b_h && a_l rel b_l) */
1296                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1297                         pmap_entry *entry;
1298
1299                         entry = pmap_find(env->proj_2_block, projT);
1300                         assert(entry);
1301                         dstT = entry->value;
1302
1303                         entry = pmap_find(env->proj_2_block, projF);
1304                         assert(entry);
1305                         dstF = entry->value;
1306
1307                         irn = new_r_Proj(irg, block, cmpH, mode_b, pnc);
1308                         dbg = get_irn_dbg_info(node);
1309                         irn = new_rd_Cond(dbg, irg, block, irn);
1310
1311                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1312                         mark_irn_visited(projHT);
1313                         exchange(projT, projHT);
1314                         projT = projHT;
1315
1316                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1317                         mark_irn_visited(projHF);
1318
1319                         newbl_eq = new_r_Block(irg, 1, &projHF);
1320
1321                         irn = new_r_Proj(irg, newbl_eq, cmpH, mode_b, pn_Cmp_Eq);
1322                         irn = new_rd_Cond(dbg, irg, newbl_eq, irn);
1323
1324                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_false);
1325                         mark_irn_visited(proj);
1326                         exchange(projF, proj);
1327                         projF = proj;
1328
1329                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_true);
1330                         mark_irn_visited(proj);
1331
1332                         newbl_l = new_r_Block(irg, 1, &proj);
1333
1334                         dbg   = get_irn_dbg_info(cmp);
1335                         cmpL = new_rd_Cmp(dbg, irg, newbl_l, lentry->low_word, rentry->low_word);
1336                         irn = new_r_Proj(irg, newbl_l, cmpL, mode_b, pnc);
1337                         dbg = get_irn_dbg_info(node);
1338                         irn = new_rd_Cond(dbg, irg, newbl_l, irn);
1339
1340                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_true);
1341                         mark_irn_visited(proj);
1342                         add_block_cf_input(dstT, projT, proj);
1343
1344                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_false);
1345                         mark_irn_visited(proj);
1346                         add_block_cf_input(dstF, projF, proj);
1347                 }  /* if */
1348
1349                 /* we have changed the control flow */
1350                 env->flags |= CF_CHANGED;
1351         } else {
1352                 idx = get_irn_idx(sel);
1353
1354                 if (env->entries[idx]) {
1355                         /*
1356                            Bad, a jump-table with double-word index.
1357                            This should not happen, but if it does we handle
1358                            it like a Conv were between (in other words, ignore
1359                            the high part.
1360                          */
1361
1362                         if (! env->entries[idx]->low_word) {
1363                                 /* not ready yet, wait */
1364                                 pdeq_putr(env->waitq, node);
1365                                 return;
1366                         }  /* if */
1367                         set_Cond_selector(node, env->entries[idx]->low_word);
1368                 }  /* if */
1369         }  /* if */
1370 }  /* lower_Cond */
1371
1372 /**
1373  * Translate a Conv to higher_signed
1374  */
1375 static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
1376         ir_node  *op    = get_Conv_op(node);
1377         ir_mode  *imode = get_irn_mode(op);
1378         ir_mode  *dst_mode = env->params->low_signed;
1379         int      idx = get_irn_idx(node);
1380         ir_graph *irg = current_ir_graph;
1381         ir_node  *block = get_nodes_block(node);
1382         dbg_info *dbg = get_irn_dbg_info(node);
1383
1384         assert(idx < env->n_entries);
1385
1386         if (mode_is_int(imode) || mode_is_reference(imode)) {
1387                 if (imode == env->params->high_unsigned) {
1388                         /* a Conv from Lu to Ls */
1389                         int op_idx = get_irn_idx(op);
1390
1391                         if (! env->entries[op_idx]->low_word) {
1392                                 /* not ready yet, wait */
1393                                 pdeq_putr(env->waitq, node);
1394                                 return;
1395                         }  /* if */
1396                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word, dst_mode);
1397                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode);
1398                 } else {
1399                         /* simple case: create a high word */
1400                         if (imode != dst_mode)
1401                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode);
1402
1403                         env->entries[idx]->low_word  = op;
1404                         env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op,
1405                                 new_Const_long(mode_Iu, get_mode_size_bits(dst_mode) - 1), dst_mode);
1406                 }  /* if */
1407         } else {
1408                 ir_node *irn, *call;
1409                 ir_mode *omode = env->params->high_signed;
1410                 ir_type *mtp = get_conv_type(imode, omode, env);
1411
1412                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1413                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1414                 set_irn_pinned(call, get_irn_pinned(node));
1415                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1416
1417                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode, 0);
1418                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode, 1);
1419         }  /* if */
1420 }  /* lower_Conv_to_Ls */
1421
1422 /**
1423  * Translate a Conv to higher_unsigned
1424  */
1425 static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
1426         ir_node  *op    = get_Conv_op(node);
1427         ir_mode  *imode = get_irn_mode(op);
1428         ir_mode  *dst_mode = env->params->low_unsigned;
1429         int      idx = get_irn_idx(node);
1430         ir_graph *irg = current_ir_graph;
1431         ir_node  *block = get_nodes_block(node);
1432         dbg_info *dbg = get_irn_dbg_info(node);
1433
1434         assert(idx < env->n_entries);
1435
1436         if (mode_is_int(imode) || mode_is_reference(imode)) {
1437                 if (imode == env->params->high_signed) {
1438                         /* a Conv from Ls to Lu */
1439                         int op_idx = get_irn_idx(op);
1440
1441                         if (! env->entries[op_idx]->low_word) {
1442                                 /* not ready yet, wait */
1443                                 pdeq_putr(env->waitq, node);
1444                                 return;
1445                         }  /* if */
1446                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word, dst_mode);
1447                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode);
1448                 } else {
1449                         /* simple case: create a high word */
1450                         if (imode != dst_mode)
1451                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode);
1452
1453                         env->entries[idx]->low_word  = op;
1454                         env->entries[idx]->high_word = new_Const(dst_mode, get_mode_null(dst_mode));
1455                 }  /* if */
1456         } else {
1457                 ir_node *irn, *call;
1458                 ir_mode *omode = env->params->high_unsigned;
1459                 ir_type *mtp = get_conv_type(imode, omode, env);
1460
1461                 /* do an intrinsic call */
1462                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1463                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1464                 set_irn_pinned(call, get_irn_pinned(node));
1465                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1466
1467                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode, 0);
1468                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode, 1);
1469         }  /* if */
1470 }  /* lower_Conv_to_Lu */
1471
1472 /**
1473  * Translate a Conv from higher_signed
1474  */
1475 static void lower_Conv_from_Ls(ir_node *node, lower_env_t *env) {
1476         ir_node  *op    = get_Conv_op(node);
1477         ir_mode  *omode = get_irn_mode(node);
1478         ir_node  *block = get_nodes_block(node);
1479         dbg_info *dbg = get_irn_dbg_info(node);
1480         int      idx = get_irn_idx(op);
1481         ir_graph *irg = current_ir_graph;
1482
1483         assert(idx < env->n_entries);
1484
1485         if (mode_is_int(omode) || mode_is_reference(omode)) {
1486                 op = env->entries[idx]->low_word;
1487
1488                 /* simple case: create a high word */
1489                 if (omode != env->params->low_signed)
1490                         op = new_rd_Conv(dbg, irg, block, op, omode);
1491
1492                 set_Conv_op(node, op);
1493         } else {
1494                 ir_node *irn, *call, *in[2];
1495                 ir_mode *imode = env->params->high_signed;
1496                 ir_type *mtp = get_conv_type(imode, omode, env);
1497
1498                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1499                 in[0] = env->entries[idx]->low_word;
1500                 in[1] = env->entries[idx]->high_word;
1501
1502                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1503                 set_irn_pinned(call, get_irn_pinned(node));
1504                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1505
1506                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1507         }  /* if */
1508 }  /* lower_Conv_from_Ls */
1509
1510 /**
1511  * Translate a Conv from higher_unsigned
1512  */
1513 static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
1514         ir_node  *op    = get_Conv_op(node);
1515         ir_mode  *omode = get_irn_mode(node);
1516         ir_node  *block = get_nodes_block(node);
1517         dbg_info *dbg = get_irn_dbg_info(node);
1518         int      idx = get_irn_idx(op);
1519         ir_graph *irg = current_ir_graph;
1520
1521         assert(idx < env->n_entries);
1522
1523         if (mode_is_int(omode) || mode_is_reference(omode)) {
1524                 op = env->entries[idx]->low_word;
1525
1526                 /* simple case: create a high word */
1527                 if (omode != env->params->low_unsigned)
1528                         op = new_rd_Conv(dbg, irg, block, op, omode);
1529
1530                 set_Conv_op(node, op);
1531         } else {
1532                 ir_node *irn, *call, *in[2];
1533                 ir_mode *imode = env->params->high_unsigned;
1534                 ir_type *mtp = get_conv_type(imode, omode, env);
1535
1536                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1537                 in[0] = env->entries[idx]->low_word;
1538                 in[1] = env->entries[idx]->high_word;
1539
1540                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1541                 set_irn_pinned(call, get_irn_pinned(node));
1542                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1543
1544                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1545         }  /* if */
1546 }  /* lower_Conv_from_Lu */
1547
1548 /**
1549  * Translate a Conv.
1550  */
1551 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env) {
1552         mode = get_irn_mode(node);
1553
1554         if (mode == env->params->high_signed) {
1555                 lower_Conv_to_Ls(node, env);
1556         } else if (mode == env->params->high_unsigned) {
1557                 lower_Conv_to_Lu(node, env);
1558         } else {
1559                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1560
1561                 if (mode == env->params->high_signed) {
1562                         lower_Conv_from_Ls(node, env);
1563         } else if (mode == env->params->high_unsigned) {
1564                         lower_Conv_from_Lu(node, env);
1565                 }  /* if */
1566         }  /* if */
1567 }  /* lower_Conv */
1568
1569 /**
1570  * Lower the method type.
1571  */
1572 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
1573         pmap_entry *entry;
1574         ident      *id;
1575         ir_type    *res;
1576
1577         if (is_lowered_type(mtp))
1578                 return mtp;
1579
1580         entry = pmap_find(lowered_type, mtp);
1581         if (! entry) {
1582                 int i, n, r, n_param, n_res;
1583
1584                 /* count new number of params */
1585                 n_param = n = get_method_n_params(mtp);
1586                 for (i = n_param - 1; i >= 0; --i) {
1587                         ir_type *tp = get_method_param_type(mtp, i);
1588
1589                         if (is_Primitive_type(tp)) {
1590                                 ir_mode *mode = get_type_mode(tp);
1591
1592                                 if (mode == env->params->high_signed ||
1593                                         mode == env->params->high_unsigned)
1594                                         ++n_param;
1595                         }  /* if */
1596                 }  /* for */
1597
1598                 /* count new number of results */
1599                 n_res = r = get_method_n_ress(mtp);
1600                 for (i = n_res - 1; i >= 0; --i) {
1601                         ir_type *tp = get_method_res_type(mtp, i);
1602
1603                         if (is_Primitive_type(tp)) {
1604                                 ir_mode *mode = get_type_mode(tp);
1605
1606                                 if (mode == env->params->high_signed ||
1607                                         mode == env->params->high_unsigned)
1608                                         ++n_res;
1609                         }  /* if */
1610                 }  /* for */
1611
1612                 id = mangle_u(new_id_from_chars("L", 1), get_type_ident(mtp));
1613                 res = new_type_method(id, n_param, n_res);
1614
1615                 /* set param types and result types */
1616                 for (i = n_param = 0; i < n; ++i) {
1617                         ir_type *tp = get_method_param_type(mtp, i);
1618
1619                         if (is_Primitive_type(tp)) {
1620                                 ir_mode *mode = get_type_mode(tp);
1621
1622                                 if (mode == env->params->high_signed) {
1623                                         set_method_param_type(res, n_param++, tp_s);
1624                                         set_method_param_type(res, n_param++, tp_s);
1625                                 } else if (mode == env->params->high_unsigned) {
1626                                         set_method_param_type(res, n_param++, tp_u);
1627                                         set_method_param_type(res, n_param++, tp_u);
1628                                 } else {
1629                                         set_method_param_type(res, n_param++, tp);
1630                                 }  /* if */
1631                         } else {
1632                                 set_method_param_type(res, n_param++, tp);
1633                         }  /* if */
1634                 }  /* for */
1635                 for (i = n_res = 0; i < r; ++i) {
1636                         ir_type *tp = get_method_res_type(mtp, i);
1637
1638                         if (is_Primitive_type(tp)) {
1639                                 ir_mode *mode = get_type_mode(tp);
1640
1641                                 if (mode == env->params->high_signed) {
1642                                         set_method_res_type(res, n_res++, tp_s);
1643                                         set_method_res_type(res, n_res++, tp_s);
1644                                 } else if (mode == env->params->high_unsigned) {
1645                                         set_method_res_type(res, n_res++, tp_u);
1646                                         set_method_res_type(res, n_res++, tp_u);
1647                                 } else {
1648                                         set_method_res_type(res, n_res++, tp);
1649                                 }  /* if */
1650                         } else {
1651                                 set_method_res_type(res, n_res++, tp);
1652                         }  /* if */
1653                 }  /* for */
1654                 set_lowered_type(mtp, res);
1655                 pmap_insert(lowered_type, mtp, res);
1656         } else {
1657                 res = entry->value;
1658         }  /* if */
1659         return res;
1660 }  /* lower_mtp */
1661
1662 /**
1663  * Translate a Return.
1664  */
1665 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
1666         ir_graph *irg = current_ir_graph;
1667         entity   *ent = get_irg_entity(irg);
1668         ir_type  *mtp = get_entity_type(ent);
1669         ir_node  **in;
1670         int      i, j, n, idx;
1671         int      need_conv = 0;
1672
1673         /* check if this return must be lowered */
1674         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1675                 ir_node *pred = get_Return_res(node, i);
1676                 ir_mode *mode = get_irn_op_mode(pred);
1677
1678                 if (mode == env->params->high_signed ||
1679                         mode == env->params->high_unsigned) {
1680                         idx = get_irn_idx(pred);
1681                         if (! env->entries[idx]->low_word) {
1682                                 /* not ready yet, wait */
1683                                 pdeq_putr(env->waitq, node);
1684                                 return;
1685                         }  /* if */
1686                         need_conv = 1;
1687                 }  /* if */
1688         }  /* for */
1689         if (! need_conv)
1690                 return;
1691
1692         ent = get_irg_entity(irg);
1693         mtp = get_entity_type(ent);
1694
1695         mtp = lower_mtp(mtp, env);
1696         set_entity_type(ent, mtp);
1697
1698         /* create a new in array */
1699         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1700         in[0] = get_Return_mem(node);
1701
1702         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1703                 ir_node *pred = get_Return_res(node, i);
1704
1705                 idx = get_irn_idx(pred);
1706                 assert(idx < env->n_entries);
1707
1708                 if (env->entries[idx]) {
1709                         in[++j] = env->entries[idx]->low_word;
1710                         in[++j] = env->entries[idx]->high_word;
1711                 } else {
1712                         in[++j] = pred;
1713                 }  /* if */
1714         }  /* for */
1715
1716         set_irn_in(node, j+1, in);
1717 }  /* lower_Return */
1718
1719 /**
1720  * Translate the parameters.
1721  */
1722 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env) {
1723         ir_graph *irg = current_ir_graph;
1724         entity   *ent = get_irg_entity(irg);
1725         ir_type  *tp  = get_entity_type(ent);
1726         ir_type  *mtp;
1727         long     *new_projs;
1728         int      i, j, n_params, rem;
1729         ir_node  *proj, *args;
1730
1731         if (is_lowered_type(tp)) {
1732                 mtp = get_associated_type(tp);
1733         } else {
1734                 mtp = tp;
1735         }  /* if */
1736         assert(! is_lowered_type(mtp));
1737
1738         n_params = get_method_n_params(mtp);
1739         if (n_params <= 0)
1740                 return;
1741
1742         NEW_ARR_A(long, new_projs, n_params);
1743
1744         /* first check if we have parameters that must be fixed */
1745         for (i = j = 0; i < n_params; ++i, ++j) {
1746                 ir_type *tp = get_method_param_type(mtp, i);
1747
1748                 new_projs[i] = j;
1749                 if (is_Primitive_type(tp)) {
1750                         ir_mode *mode = get_type_mode(tp);
1751
1752                         if (mode == env->params->high_signed ||
1753                                 mode == env->params->high_unsigned)
1754                                 ++j;
1755                 }  /* if */
1756         }  /* for */
1757         if (i == j)
1758                 return;
1759
1760         mtp = lower_mtp(mtp, env);
1761         set_entity_type(ent, mtp);
1762
1763         /* switch off optimization for new Proj nodes or they might be CSE'ed
1764            with not patched one's */
1765         rem = get_optimize();
1766         set_optimize(0);
1767
1768         /* ok, fix all Proj's and create new ones */
1769         args = get_irg_args(irg);
1770         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1771                 ir_node *pred = get_Proj_pred(proj);
1772                 long proj_nr;
1773                 int idx;
1774                 ir_mode *mode;
1775                 dbg_info *dbg;
1776
1777                 /* do not visit this node again */
1778                 mark_irn_visited(proj);
1779
1780                 if (pred != args)
1781                         continue;
1782
1783                 proj_nr = get_Proj_proj(proj);
1784                 set_Proj_proj(proj, new_projs[proj_nr]);
1785
1786                 idx = get_irn_idx(proj);
1787                 if (env->entries[idx]) {
1788                         mode = get_irn_mode(proj);
1789
1790                         if (mode == env->params->high_signed) {
1791                                 mode = env->params->low_signed;
1792                         } else {
1793                                 mode = env->params->low_unsigned;
1794                         }  /* if */
1795
1796                         dbg = get_irn_dbg_info(proj);
1797                         env->entries[idx]->low_word  =
1798                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, mode, new_projs[proj_nr]);
1799                         env->entries[idx]->high_word =
1800                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, mode, new_projs[proj_nr] + 1);
1801                 }  /* if */
1802         }  /* for */
1803         set_optimize(rem);
1804 }  /* lower_Start */
1805
1806 /**
1807  * Translate a Call.
1808  */
1809 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
1810         ir_graph *irg = current_ir_graph;
1811         ir_type  *tp = get_Call_type(node);
1812         ir_type  *call_tp;
1813         ir_node  **in, *proj, *results;
1814         int      n_params, n_res, need_lower = 0;
1815         int      i, j;
1816         long     *res_numbers = NULL;
1817
1818         if (is_lowered_type(tp)) {
1819                 call_tp = get_associated_type(tp);
1820         } else {
1821                 call_tp = tp;
1822         }  /* if */
1823
1824         assert(! is_lowered_type(call_tp));
1825
1826         n_params = get_method_n_params(call_tp);
1827         for (i = 0; i < n_params; ++i) {
1828                 ir_type *tp = get_method_param_type(call_tp, i);
1829
1830                 if (is_Primitive_type(tp)) {
1831                         ir_mode *mode = get_type_mode(tp);
1832
1833                         if (mode == env->params->high_signed ||
1834                                 mode == env->params->high_unsigned) {
1835                                 need_lower = 1;
1836                                 break;
1837                         }  /* if */
1838                 }  /* if */
1839         }  /* for */
1840         n_res = get_method_n_ress(call_tp);
1841         if (n_res > 0) {
1842                 NEW_ARR_A(long, res_numbers, n_res);
1843
1844                 for (i = j = 0; i < n_res; ++i, ++j) {
1845                         ir_type *tp = get_method_res_type(call_tp, i);
1846
1847                         res_numbers[i] = j;
1848                         if (is_Primitive_type(tp)) {
1849                                 ir_mode *mode = get_type_mode(tp);
1850
1851                                 if (mode == env->params->high_signed ||
1852                                         mode == env->params->high_unsigned) {
1853                                         need_lower = 1;
1854                                         ++j;
1855                                 }  /* if */
1856                         }  /* if */
1857                 }  /* for */
1858         }  /* if */
1859
1860         if (! need_lower)
1861                 return;
1862
1863         /* let's lower it */
1864         call_tp = lower_mtp(call_tp, env);
1865         set_Call_type(node, call_tp);
1866
1867         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1868
1869         in[0] = get_Call_mem(node);
1870         in[1] = get_Call_ptr(node);
1871
1872         for (j = 2, i = 0; i < n_params; ++i) {
1873                 ir_node *pred = get_Call_param(node, i);
1874                 int     idx = get_irn_idx(pred);
1875
1876                 if (env->entries[idx]) {
1877                         if (! env->entries[idx]->low_word) {
1878                                 /* not ready yet, wait */
1879                                 pdeq_putr(env->waitq, node);
1880                                 return;
1881                         }
1882                         in[j++] = env->entries[idx]->low_word;
1883                         in[j++] = env->entries[idx]->high_word;
1884                 } else {
1885                         in[j++] = pred;
1886                 }  /* if */
1887         }  /* for */
1888
1889         set_irn_in(node, j, in);
1890
1891         /* fix the results */
1892         results = NULL;
1893         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1894                 long proj_nr = get_Proj_proj(proj);
1895
1896                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
1897                         /* found the result proj */
1898                         results = proj;
1899                         break;
1900                 }  /* if */
1901         }  /* for */
1902
1903         if (results) {          /* there are results */
1904                 int rem = get_optimize();
1905
1906                 /* switch off optimization for new Proj nodes or they might be CSE'ed
1907                    with not patched one's */
1908                 set_optimize(0);
1909                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
1910                         if (get_Proj_pred(proj) == results) {
1911                                 long proj_nr = get_Proj_proj(proj);
1912                                 int idx;
1913
1914                                 /* found a result */
1915                                 set_Proj_proj(proj, res_numbers[proj_nr]);
1916                                 idx = get_irn_idx(proj);
1917                                 if (env->entries[idx]) {
1918                                         ir_mode *mode = get_irn_mode(proj);
1919                                         dbg_info *dbg;
1920
1921                                         if (mode == env->params->high_signed) {
1922                                                 mode = env->params->low_signed;
1923                                         } else {
1924                                                 mode = env->params->low_unsigned;
1925                                         }  /* if */
1926
1927                                         dbg = get_irn_dbg_info(proj);
1928                                         env->entries[idx]->low_word  =
1929                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, mode, res_numbers[proj_nr]);
1930                                         env->entries[idx]->high_word =
1931                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, mode, res_numbers[proj_nr] + 1);
1932                                 }  /* if */
1933                                 mark_irn_visited(proj);
1934                         }  /* if */
1935                 }  /* for */
1936                 set_optimize(rem);
1937         }
1938 }  /* lower_Call */
1939
1940 /**
1941  * Translate an Unknown into two.
1942  */
1943 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env) {
1944         int idx = get_irn_idx(node);
1945         ir_graph *irg = current_ir_graph;
1946
1947         env->entries[idx]->low_word  =
1948         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
1949 }  /* lower_Unknown */
1950
1951 /**
1952  * Translate a Phi.
1953  *
1954  * First step: just create two templates
1955  */
1956 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
1957         ir_graph *irg = current_ir_graph;
1958         ir_node  *block, *unk;
1959         ir_node  **inl, **inh;
1960         dbg_info *dbg;
1961         int      idx, i, arity = get_Phi_n_preds(phi);
1962         int      enq = 0;
1963
1964         idx = get_irn_idx(phi);
1965         if (env->entries[idx]->low_word) {
1966                 /* Phi nodes already build, check for inputs */
1967                 ir_node *phil = env->entries[idx]->low_word;
1968                 ir_node *phih = env->entries[idx]->high_word;
1969
1970                 for (i = 0; i < arity; ++i) {
1971                         ir_node *pred = get_Phi_pred(phi, i);
1972                         int     idx = get_irn_idx(pred);
1973
1974                         if (env->entries[idx]->low_word) {
1975                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
1976                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
1977                         } else {
1978                                 /* still not ready */
1979                                 pdeq_putr(env->waitq, phi);
1980                                 return;
1981                         }  /* if */
1982                 }  /* for */
1983         }  /* if */
1984
1985         /* first create a new in array */
1986         NEW_ARR_A(ir_node *, inl, arity);
1987         NEW_ARR_A(ir_node *, inh, arity);
1988         unk = new_r_Unknown(irg, mode);
1989
1990         for (i = 0; i < arity; ++i) {
1991                 ir_node *pred = get_Phi_pred(phi, i);
1992                 int     idx = get_irn_idx(pred);
1993
1994                 if (env->entries[idx]->low_word) {
1995                         inl[i] = env->entries[idx]->low_word;
1996                         inh[i] = env->entries[idx]->high_word;
1997                 } else {
1998                         inl[i] = unk;
1999                         inh[i] = unk;
2000                         enq = 1;
2001                 }  /* if */
2002         }  /* for */
2003
2004         dbg   = get_irn_dbg_info(phi);
2005         block = get_nodes_block(phi);
2006
2007         idx = get_irn_idx(phi);
2008         assert(idx < env->n_entries);
2009         env->entries[idx]->low_word  = new_rd_Phi(dbg, irg, block, arity, inl, mode);
2010         env->entries[idx]->high_word = new_rd_Phi(dbg, irg, block, arity, inh, mode);
2011
2012         if (enq) {
2013                 /* not yet finished */
2014                 pdeq_putr(env->waitq, phi);
2015         }  /* if */
2016 }  /* lower_Phi */
2017
2018 /**
2019  * check for opcodes that must always be lowered.
2020  */
2021 static int always_lower(opcode code) {
2022         switch (code) {
2023         case iro_Start:
2024         case iro_Call:
2025         case iro_Return:
2026         case iro_Cond:
2027     case iro_Conv:
2028                 return 1;
2029         default:
2030                 return 0;
2031         }  /* switch */
2032 }  /* always_lower */
2033
2034 /**
2035  * The type of a lower function.
2036  *
2037  * @param node   the node to be lowered
2038  * @param mode   the low mode for the destination node
2039  * @param env    the lower environment
2040  */
2041 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2042
2043 /**
2044  * Lower a node.
2045  */
2046 static void lower_ops(ir_node *node, void *env)
2047 {
2048         lower_env_t  *lenv = env;
2049         node_entry_t *entry;
2050         int          idx = get_irn_idx(node);
2051
2052         entry = lenv->entries[idx];
2053         if (entry || always_lower(get_irn_opcode(node))) {
2054                 ir_op      *op = get_irn_op(node);
2055                 lower_func func = (lower_func)op->ops.generic;
2056
2057                 if (func) {
2058                         ir_mode *mode = get_irn_op_mode(node);
2059
2060                         if (mode == lenv->params->high_signed)
2061                                 mode = lenv->params->low_signed;
2062                         else
2063                                 mode = lenv->params->low_unsigned;
2064
2065                         DB((dbg, LEVEL_1, "  %+F\n", node));
2066                         func(node, mode, lenv);
2067                 }  /* if */
2068         }  /* if */
2069 }  /* lower_ops */
2070
2071 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2072
2073 /**
2074  * Compare two op_mode_entry_t's.
2075  */
2076 static int cmp_op_mode(const void *elt, const void *key, size_t size) {
2077         const op_mode_entry_t *e1 = elt;
2078         const op_mode_entry_t *e2 = key;
2079
2080         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2081 }  /* cmp_op_mode */
2082
2083 /**
2084  * Compare two conv_tp_entry_t's.
2085  */
2086 static int cmp_conv_tp(const void *elt, const void *key, size_t size) {
2087         const conv_tp_entry_t *e1 = elt;
2088         const conv_tp_entry_t *e2 = key;
2089
2090         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2091 }  /* static int cmp_conv_tp */
2092
2093 /*
2094  * Do the lowering.
2095  */
2096 void lower_dw_ops(const lwrdw_param_t *param)
2097 {
2098         lower_env_t lenv;
2099         int i;
2100         ir_graph *rem;
2101
2102         if (! param)
2103                 return;
2104
2105         if (! param->enable)
2106                 return;
2107
2108         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2109
2110         assert(2 * get_mode_size_bits(param->low_signed)   == get_mode_size_bits(param->high_signed));
2111         assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
2112         assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
2113
2114     /* create the necessary maps */
2115         if (! prim_types)
2116                 prim_types = pmap_create();
2117         if (! intrinsic_fkt)
2118                 intrinsic_fkt = new_set(cmp_op_mode, iro_MaxOpcode);
2119         if (! conv_types)
2120                 conv_types = new_set(cmp_conv_tp, 16);
2121         if (! lowered_type)
2122                 lowered_type = pmap_create();
2123
2124     /* create a primitive unsigned and signed type */
2125         if (! tp_u)
2126                 tp_u = get_primitive_type(param->low_unsigned);
2127         if (! tp_s)
2128                 tp_s = get_primitive_type(param->low_signed);
2129
2130     /* create method types for the created binop calls */
2131         if (! binop_tp_u) {
2132                 binop_tp_u = new_type_method(IDENT("binop_u_intrinsic"), 4, 2);
2133                 set_method_param_type(binop_tp_u, 0, tp_u);
2134                 set_method_param_type(binop_tp_u, 1, tp_u);
2135                 set_method_param_type(binop_tp_u, 2, tp_u);
2136                 set_method_param_type(binop_tp_u, 3, tp_u);
2137                 set_method_res_type(binop_tp_u, 0, tp_u);
2138                 set_method_res_type(binop_tp_u, 1, tp_u);
2139         }  /* if */
2140         if (! binop_tp_s) {
2141                 binop_tp_s = new_type_method(IDENT("binop_s_intrinsic"), 4, 2);
2142                 set_method_param_type(binop_tp_s, 0, tp_s);
2143                 set_method_param_type(binop_tp_s, 1, tp_s);
2144                 set_method_param_type(binop_tp_s, 2, tp_s);
2145                 set_method_param_type(binop_tp_s, 3, tp_s);
2146                 set_method_res_type(binop_tp_s, 0, tp_s);
2147                 set_method_res_type(binop_tp_s, 1, tp_s);
2148         }  /* if */
2149         if (! shiftop_tp_u) {
2150                 shiftop_tp_u = new_type_method(IDENT("shiftop_u_intrinsic"), 3, 2);
2151                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2152                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2153                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2154                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2155                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2156         }  /* if */
2157         if (! shiftop_tp_s) {
2158                 shiftop_tp_s = new_type_method(IDENT("shiftop_s_intrinsic"), 3, 2);
2159                 set_method_param_type(shiftop_tp_s, 0, tp_s);
2160                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2161                 /* beware: shift count is always mode_Iu */
2162                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2163                 set_method_res_type(shiftop_tp_s, 0, tp_s);
2164                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2165         }  /* if */
2166         if (! unop_tp_u) {
2167                 unop_tp_u = new_type_method(IDENT("unop_u_intrinsic"), 2, 2);
2168                 set_method_param_type(unop_tp_u, 0, tp_u);
2169                 set_method_param_type(unop_tp_u, 1, tp_u);
2170                 set_method_res_type(unop_tp_u, 0, tp_u);
2171                 set_method_res_type(unop_tp_u, 1, tp_u);
2172         }  /* if */
2173         if (! unop_tp_s) {
2174                 unop_tp_s = new_type_method(IDENT("unop_s_intrinsic"), 2, 2);
2175                 set_method_param_type(unop_tp_s, 0, tp_s);
2176                 set_method_param_type(unop_tp_s, 1, tp_s);
2177                 set_method_res_type(unop_tp_s, 0, tp_s);
2178                 set_method_res_type(unop_tp_s, 1, tp_s);
2179         }  /* if */
2180
2181         lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), mode_Iu);
2182         lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), mode_Iu);
2183         lenv.waitq         = new_pdeq();
2184         lenv.params        = param;
2185
2186         /* first clear the generic function pointer for all ops */
2187         clear_irp_opcodes_generic_func();
2188
2189 #define LOWER2(op, fkt)   op_##op->ops.generic = (op_func)fkt
2190 #define LOWER(op)         LOWER2(op, lower_##op)
2191 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2192 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2193
2194     /* the table of all operations that must be lowered follows */
2195         LOWER(Load);
2196         LOWER(Store);
2197         LOWER(Const);
2198         LOWER(And);
2199         LOWER(Or);
2200         LOWER(Eor);
2201         LOWER(Not);
2202         LOWER(Cond);
2203         LOWER(Return);
2204         LOWER(Call);
2205         LOWER(Unknown);
2206         LOWER(Phi);
2207         LOWER(Start);
2208
2209         LOWER_BIN(Add);
2210         LOWER_BIN(Sub);
2211         LOWER_BIN(Mul);
2212         LOWER(Shl);
2213         LOWER(Shr);
2214         LOWER(Shrs);
2215         LOWER(Rot);
2216         LOWER_UN(Minus);
2217         LOWER(DivMod);
2218         LOWER(Div);
2219         LOWER(Mod);
2220         LOWER_UN(Abs);
2221
2222         LOWER(Conv);
2223
2224 #undef LOWER_UN
2225 #undef LOWER_BIN
2226 #undef LOWER
2227 #undef LOWER2
2228
2229         /* transform all graphs */
2230         rem = current_ir_graph;
2231         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2232                 ir_graph *irg = get_irp_irg(i);
2233                 int n_idx;
2234
2235                 obstack_init(&lenv.obst);
2236
2237                 n_idx = get_irg_last_idx(irg);
2238                 lenv.n_entries = n_idx;
2239                 lenv.entries   = xmalloc(n_idx * sizeof(lenv.entries[0]));
2240                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2241
2242                 /* first step: link all nodes and allocate data */
2243                 lenv.flags = 0;
2244                 lenv.proj_2_block = pmap_create();
2245                 irg_walk_graph(irg, firm_clear_link, prepare_links, &lenv);
2246
2247                 if (lenv.flags & MUST_BE_LOWERED) {
2248                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2249
2250                         /* must do some work */
2251                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2252
2253                         /* last step: all waiting nodes */
2254                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2255                         current_ir_graph = irg;
2256                         while (! pdeq_empty(lenv.waitq)) {
2257                                 ir_node *node = pdeq_getl(lenv.waitq);
2258
2259                                 lower_ops(node, &lenv);
2260                         }  /* while */
2261
2262                         /* outs are invalid, we changed the graph */
2263                         set_irg_outs_inconsistent(irg);
2264
2265                         if (lenv.flags & CF_CHANGED) {
2266                                 /* control flow changed, dominance info is invalid */
2267                                 set_irg_doms_inconsistent(irg);
2268                                 set_irg_extblk_inconsistent(irg);
2269                                 set_irg_loopinfo_inconsistent(irg);
2270                         }  /* if */
2271
2272                         dump_ir_block_graph(irg, "-dw");
2273                 }  /* if */
2274                 pmap_destroy(lenv.proj_2_block);
2275                 free(lenv.entries);
2276                 obstack_free(&lenv.obst, NULL);
2277         }  /* for */
2278         del_pdeq(lenv.waitq);
2279         current_ir_graph = rem;
2280 }  /* lower_dw_ops */
2281
2282 /* Default implementation. */
2283 entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2284                                  const ir_mode *imode, const ir_mode *omode,
2285                                  void *context)
2286 {
2287         char buf[64];
2288         ident *id;
2289         entity *ent;
2290
2291         if (imode == omode) {
2292                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2293         } else {
2294                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2295                         get_mode_name(imode), get_mode_name(omode));
2296         }  /* if */
2297         id = new_id_from_str(buf);
2298
2299         ent = new_entity(get_glob_type(), id, method);
2300         set_entity_ld_ident(ent, get_entity_ident(ent));
2301         set_entity_visibility(ent, visibility_external_allocated);
2302         return ent;
2303 }  /* def_create_intrinsic_fkt */