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