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

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