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

   1 /*
   2  * Project:     libFIRM
   3  * File name:   ir/lower/lower_dw.c
   4  * Purpose:     Lower Double word operations, ie Mode L -> I.
   5  * Author:      Michael Beck
   6  * Created:             8.10.2004
   7  * CVS-ID:      $Id$
   8  * Copyright:   (c) 1998-2006 Universität Karlsruhe
   9  * Licence:     This file protected by GPL -  GNU GENERAL PUBLIC LICENSE.
  10  */
  11 #ifdef HAVE_CONFIG_H
  12 # include "config.h"
  13 #endif
  14
  15 #ifdef HAVE_MALLOC_H
  16 # include <malloc.h>
  17 #endif
  18 #ifdef HAVE_ALLOCA_H
  19 # include <alloca.h>
  20 #endif
  21 #ifdef HAVE_STRING_H
  22 # include <string.h>
  23 #endif
  24 #ifdef HAVE_STDLIB_H
  25 # include <stdlib.h>
  26 #endif
  27
  28 #include <assert.h>
  29
  30 #include "irnode_t.h"
  31 #include "irgraph_t.h"
  32 #include "irmode_t.h"
  33 #include "iropt_t.h"
  34 #include "irgmod.h"
  35 #include "tv_t.h"
  36 #include "dbginfo_t.h"
  37 #include "iropt_dbg.h"
  38 #include "irflag_t.h"
  39 #include "firmstat.h"
  40 #include "irgwalk.h"
  41 #include "ircons.h"
  42 #include "lower_dw.h"
  43 #include "irflag.h"
  44 #include "irtools.h"
  45 #include "debug.h"
  46 #include "set.h"
  47 #include "pmap.h"
  48 #include "pdeq.h"
  49 #include "irdump.h"
  50
  51 /** A map from mode to a primitive type. */
  52 static pmap *prim_types;
  53
  54 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  55 static set *intrinsic_fkt;
  56
  57 /** A map from (imode, omode) to conv function types. */
  58 static set *conv_types;
  59
  60 /** A map from a method type to its lowered type. */
  61 static pmap *lowered_type;
  62
  63 /** The types for the binop and unop intrinsics. */
  64 static ir_type *binop_tp_u, *binop_tp_s, *unop_tp_u, *unop_tp_s, *shiftop_tp_u, *shiftop_tp_s, *tp_s, *tp_u;
  65
  66 /** the debug handle */
  67 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  68
  69 /**
  70  * An entry in the (op, imode, omode) -> entity map.
  71  */
  72 typedef struct _op_mode_entry {
  73         const ir_op   *op;    /**< the op */
  74         const ir_mode *imode; /**< the input mode */
  75         const ir_mode *omode; /**< the output mode */
  76         entity        *ent;   /**< the associated entity of this (op, imode, omode) triple */
  77 } op_mode_entry_t;
  78
  79 /**
  80  * An entry in the (imode, omode) -> tp map.
  81  */
  82 typedef struct _conv_tp_entry {
  83         const ir_mode *imode; /**< the input mode */
  84         const ir_mode *omode; /**< the output mode */
  85         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
  86 } conv_tp_entry_t;
  87
  88 /**
  89  * Every double word node will be replaced,
  90  * we need some store to hold the replacement:
  91  */
  92 typedef struct _node_entry_t {
  93         ir_node *low_word;        /**< the low word */
  94         ir_node *high_word;       /**< the high word */
  95 } node_entry_t;
  96
  97 enum lower_flags {
  98         MUST_BE_LOWERED = 1,   /**< graph must be lowered */
  99         CF_CHANGED      = 2,   /**< control flow was changed */
 100 };
 101
 102 /**
 103  * The lower environment.
 104  */
 105 typedef struct _lower_env_t {
 106         node_entry_t **entries;       /**< entries per node */
 107         struct obstack obst;          /**< an obstack holding the temporary data */
 108         tarval   *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 109         tarval   *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 110         pdeq     *waitq;              /**< a wait queue of all nodes that must be handled later */
 111         pmap     *proj_2_block;       /**< a map from ProjX to its destination blocks */
 112         const lwrdw_param_t *params;  /**< transformation parameter */
 113         unsigned flags;               /**< some flags */
 114         int      n_entries;           /**< number of entries */
 115 } lower_env_t;
 116
 117 /**
 118  * Get a primitive mode for a mode.
 119  */
 120 static ir_type *get_primitive_type(ir_mode *mode) {
 121         pmap_entry *entry = pmap_find(prim_types, mode);
 122         ir_type *tp;
 123         char buf[64];
 124
 125         if (entry)
 126                 return entry->value;
 127
 128         snprintf(buf, sizeof(buf), "_prim_%s", get_mode_name(mode));
 129         tp = new_type_primitive(new_id_from_str(buf), mode);
 130
 131         pmap_insert(prim_types, mode, tp);
 132         return tp;
 133 }  /* get_primitive_type */
 134
 135 /**
 136  * Create a method type for a Conv emulation from imode to omode.
 137  */
 138 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env) {
 139         conv_tp_entry_t key, *entry;
 140         ir_type *mtd;
 141
 142         key.imode = imode;
 143         key.omode = omode;
 144         key.mtd   = NULL;
 145
 146         entry = set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 147         if (! entry->mtd) {
 148                 int n_param = 1, n_res = 1;
 149                 char buf[64];
 150
 151                 if (imode == env->params->high_signed || imode == env->params->high_unsigned)
 152                         n_param = 2;
 153                 if (omode == env->params->high_signed || omode == env->params->high_unsigned)
 154                         n_res = 2;
 155
 156                 /* create a new one */
 157                 snprintf(buf, sizeof(buf), "LConv%s%s", get_mode_name(imode), get_mode_name(omode));
 158                 mtd = new_type_method(new_id_from_str(buf), n_param, n_res);
 159
 160                 /* set param types and result types */
 161                 n_param = 0;
 162                 if (imode == env->params->high_signed) {
 163                         set_method_param_type(mtd, n_param++, tp_s);
 164                         set_method_param_type(mtd, n_param++, tp_s);
 165                 } else if (imode == env->params->high_unsigned) {
 166                         set_method_param_type(mtd, n_param++, tp_u);
 167                         set_method_param_type(mtd, n_param++, tp_u);
 168                 } else {
 169                         ir_type *tp = get_primitive_type(imode);
 170                         set_method_param_type(mtd, n_param++, tp);
 171                 }  /* if */
 172
 173                 n_res = 0;
 174                 if (omode == env->params->high_signed) {
 175                         set_method_res_type(mtd, n_res++, tp_s);
 176                         set_method_res_type(mtd, n_res++, tp_s);
 177                 } else if (omode == env->params->high_unsigned) {
 178                         set_method_res_type(mtd, n_res++, tp_u);
 179                         set_method_res_type(mtd, n_res++, tp_u);
 180                 } else {
 181                         ir_type *tp = get_primitive_type(omode);
 182                         set_method_res_type(mtd, n_res++, tp);
 183                 }  /* if */
 184                 entry->mtd = mtd;
 185         } else {
 186                 mtd = entry->mtd;
 187         }  /* if */
 188         return mtd;
 189 }  /* get_conv_type */
 190
 191 /**
 192  * Add an additional control flow input to a block.
 193  * Patch all Phi nodes. The new Phi inputs are copied from
 194  * old input number nr.
 195  */
 196 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 197 {
 198         int i, arity = get_irn_arity(block);
 199         ir_node **in, *phi;
 200
 201         assert(nr < arity);
 202
 203         NEW_ARR_A(ir_node *, in, arity + 1);
 204         for (i = 0; i < arity; ++i)
 205                 in[i] = get_irn_n(block, i);
 206         in[i] = cf;
 207
 208         set_irn_in(block, i + 1, in);
 209
 210         for (phi = get_irn_link(block); phi; phi = get_irn_link(phi)) {
 211                 for (i = 0; i < arity; ++i)
 212                         in[i] = get_irn_n(phi, i);
 213                 in[i] = in[nr];
 214                 set_irn_in(phi, i + 1, in);
 215         }  /* for */
 216 }  /* add_block_cf_input_nr */
 217
 218 /**
 219  * Add an additional control flow input to a block.
 220  * Patch all Phi nodes. The new Phi inputs are copied from
 221  * old input from cf tmpl.
 222  */
 223 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 224 {
 225         int i, arity = get_irn_arity(block);
 226         int nr = 0;
 227
 228         for (i = 0; i < arity; ++i) {
 229                 if (get_irn_n(block, i) == tmpl) {
 230                         nr = i;
 231                         break;
 232                 }  /* if */
 233         }  /* for */
 234         assert(i < arity);
 235         add_block_cf_input_nr(block, nr, cf);
 236 }  /* add_block_cf_input */
 237
 238 /**
 239  * Return the "operational" mode of a Firm node.
 240  */
 241 static ir_mode *get_irn_op_mode(ir_node *node)
 242 {
 243         switch (get_irn_opcode(node)) {
 244         case iro_Load:
 245                 return get_Load_mode(node);
 246         case iro_Store:
 247                 return get_irn_mode(get_Store_value(node));
 248         case iro_DivMod:
 249                 return get_irn_mode(get_DivMod_left(node));
 250         case iro_Div:
 251                 return get_irn_mode(get_Div_left(node));
 252         case iro_Mod:
 253                 return get_irn_mode(get_Mod_left(node));
 254         case iro_Cmp:
 255                 return get_irn_mode(get_Cmp_left(node));
 256         default:
 257                 return get_irn_mode(node);
 258         }  /* switch */
 259 }  /* get_irn_op_mode */
 260
 261 /**
 262  * Walker, prepare the node links.
 263  */
 264 static void prepare_links(ir_node *node, void *env)
 265 {
 266         lower_env_t  *lenv = env;
 267         ir_mode      *mode = get_irn_op_mode(node);
 268         node_entry_t *link;
 269         int          i;
 270
 271         if (mode == lenv->params->high_signed ||
 272                 mode == lenv->params->high_unsigned) {
 273                 /* ok, found a node that will be lowered */
 274                 link = obstack_alloc(&lenv->obst, sizeof(*link));
 275
 276                 memset(link, 0, sizeof(*link));
 277
 278                 lenv->entries[get_irn_idx(node)] = link;
 279                 lenv->flags |= MUST_BE_LOWERED;
 280         } else if (get_irn_op(node) == op_Conv) {
 281                 /* Conv nodes have two modes */
 282                 ir_node *pred = get_Conv_op(node);
 283                 mode = get_irn_mode(pred);
 284
 285                 if (mode == lenv->params->high_signed ||
 286                         mode == lenv->params->high_unsigned) {
 287                         /* must lower this node either but don't need a link */
 288                         lenv->flags |= MUST_BE_LOWERED;
 289                 }  /* if */
 290                 return;
 291         }  /* if */
 292
 293         if (is_Proj(node)) {
 294                 /* link all Proj nodes to its predecessor:
 295                    Note that Tuple Proj's and its Projs are linked either. */
 296                 ir_node *pred = get_Proj_pred(node);
 297
 298                 set_irn_link(node, get_irn_link(pred));
 299                 set_irn_link(pred, node);
 300         } else if (is_Phi(node)) {
 301                 /* link all Phi nodes to its block */
 302                 ir_node *block = get_nodes_block(node);
 303
 304                 set_irn_link(node, get_irn_link(block));
 305                 set_irn_link(block, node);
 306         } else if (is_Block(node)) {
 307                 /* fill the Proj -> Block map */
 308                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 309                         ir_node *pred = get_Block_cfgpred(node, i);
 310
 311                         if (is_Proj(pred))
 312                                 pmap_insert(lenv->proj_2_block, pred, node);
 313                 }  /* for */
 314         }  /* if */
 315
 316         /* handle support for Psi nodes */
 317         if (mode == mode_b || get_irn_op(node) == op_Psi) {
 318                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
 319                         ir_node *proj = get_irn_n(node, i);
 320
 321                         if (is_Proj(proj)) {
 322                                 ir_node *cmp = get_Proj_pred(proj);
 323
 324                                 if (is_Cmp(cmp)) {
 325                                         ir_node *l = get_Cmp_left(cmp);
 326                                         mode = get_irn_mode(l);
 327
 328                                         if (mode == lenv->params->high_signed ||
 329                                                 mode == lenv->params->high_unsigned) {
 330                                                 /* ok, found a node that will be lowered */
 331                                                 ir_node *nproj;
 332                                                 int rem = get_optimize();
 333
 334                                                 set_optimize(0);
 335                                                 nproj = new_rd_Proj(
 336                                                         get_irn_dbg_info(proj),
 337                                                         current_ir_graph,
 338                                                         get_nodes_block(proj),
 339                                                         cmp,
 340                                                         get_irn_mode(proj),
 341                                                         get_Proj_proj(proj));
 342                                                 set_optimize(rem);
 343
 344                                                 set_irn_n(node, i, nproj);
 345                                                 lenv->flags |= MUST_BE_LOWERED;
 346                                         }  /* if */
 347                                 }  /* if */
 348                         }  /* if */
 349                 }  /* for */
 350         }  /* if */
 351 }  /* prepare_links */
 352
 353 /**
 354  * Translate a Constant: create two.
 355  */
 356 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env) {
 357         tarval   *tv, *tv_l, *tv_h;
 358         ir_node  *low, *high;
 359         dbg_info *dbg = get_irn_dbg_info(node);
 360         ir_node  *block = get_nodes_block(node);
 361         int      idx;
 362         ir_graph *irg = current_ir_graph;
 363
 364         tv   = get_Const_tarval(node);
 365
 366         tv_l = tarval_convert_to(tv, mode);
 367         low  = new_rd_Const(dbg, irg, block, mode, tv_l);
 368
 369         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 370         high = new_rd_Const(dbg, irg, block, mode, tv_h);
 371
 372         idx = get_irn_idx(node);
 373         assert(idx < env->n_entries);
 374         env->entries[idx]->low_word  = low;
 375         env->entries[idx]->high_word = high;
 376 }  /* lower_Const */
 377
 378 /**
 379  * Translate a Load: create two.
 380  */
 381 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env) {
 382         ir_graph *irg = current_ir_graph;
 383         ir_node  *adr = get_Load_ptr(node);
 384         ir_node  *mem = get_Load_mem(node);
 385         ir_node  *low, *high, *proj;
 386         dbg_info *dbg;
 387         ir_node  *block = get_nodes_block(node);
 388         int      idx;
 389
 390         if (env->params->little_endian) {
 391                 low  = adr;
 392                 high = new_r_Add(irg, block, adr,
 393                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 394                         get_irn_mode(adr));
 395         } else {
 396                 low  = new_r_Add(irg, block, adr,
 397                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 398                         get_irn_mode(adr));
 399                 high = adr;
 400         }  /* if */
 401
 402         /* create two loads */
 403         dbg  = get_irn_dbg_info(node);
 404         low  = new_rd_Load(dbg, irg, block, mem, low,  mode);
 405         proj = new_r_Proj(irg, block, low, mode_M, pn_Load_M);
 406         high = new_rd_Load(dbg, irg, block, proj, high, mode);
 407
 408         set_Load_volatility(low,  get_Load_volatility(node));
 409         set_Load_volatility(high, get_Load_volatility(node));
 410
 411         idx = get_irn_idx(node);
 412         assert(idx < env->n_entries);
 413         env->entries[idx]->low_word  = low;
 414         env->entries[idx]->high_word = high;
 415
 416         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 417                 idx = get_irn_idx(proj);
 418
 419                 switch (get_Proj_proj(proj)) {
 420                 case pn_Load_M:         /* Memory result. */
 421                         /* put it to the second one */
 422                         set_Proj_pred(proj, high);
 423                         break;
 424                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 425                         /* put it to the first one */
 426                         set_Proj_pred(proj, low);
 427                         break;
 428                 case pn_Load_res:       /* Result of load operation. */
 429                         assert(idx < env->n_entries);
 430                         env->entries[idx]->low_word  = new_r_Proj(irg, block, low, mode, pn_Load_res);
 431                         env->entries[idx]->high_word = new_r_Proj(irg, block, high, mode, pn_Load_res);
 432                         break;
 433                 default:
 434                         assert(0 && "unexpected Proj number");
 435                 }  /* switch */
 436                 /* mark this proj: we have handled it already, otherwise we might fall into
 437                  * out new nodes. */
 438                 mark_irn_visited(proj);
 439         }  /* for */
 440 }  /* lower_Load */
 441
 442 /**
 443  * Translate a Store: create two.
 444  */
 445 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env) {
 446         ir_graph *irg;
 447         ir_node  *block, *adr, *mem;
 448         ir_node  *low, *high, *irn, *proj;
 449         dbg_info *dbg;
 450         int      idx;
 451         node_entry_t *entry;
 452
 453         irn = get_Store_value(node);
 454         entry = env->entries[get_irn_idx(irn)];
 455         assert(entry);
 456
 457         if (! entry->low_word) {
 458                 /* not ready yet, wait */
 459                 pdeq_putr(env->waitq, node);
 460                 return;
 461         }  /* if */
 462
 463         irg = current_ir_graph;
 464         adr = get_Store_ptr(node);
 465         mem = get_Store_mem(node);
 466         block = get_nodes_block(node);
 467
 468         if (env->params->little_endian) {
 469                 low  = adr;
 470                 high = new_r_Add(irg, block, adr,
 471                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 472                         get_irn_mode(adr));
 473         } else {
 474                 low  = new_r_Add(irg, block, adr,
 475                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 476                         get_irn_mode(adr));
 477                 high = adr;
 478         }  /* if */
 479
 480         /* create two Stores */
 481         dbg = get_irn_dbg_info(node);
 482         low  = new_rd_Store(dbg, irg, block, mem, low,  entry->low_word);
 483         proj = new_r_Proj(irg, block, low, mode_M, pn_Store_M);
 484         high = new_rd_Store(dbg, irg, block, proj, high, entry->high_word);
 485
 486         set_Store_volatility(low,  get_Store_volatility(node));
 487         set_Store_volatility(high, get_Store_volatility(node));
 488
 489         idx = get_irn_idx(node);
 490         assert(idx < env->n_entries);
 491         env->entries[idx]->low_word  = low;
 492         env->entries[idx]->high_word = high;
 493
 494         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 495                 idx = get_irn_idx(proj);
 496
 497                 switch (get_Proj_proj(proj)) {
 498                 case pn_Store_M:         /* Memory result. */
 499                         /* put it to the second one */
 500                         set_Proj_pred(proj, high);
 501                         break;
 502                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 503                         /* put it to the first one */
 504                         set_Proj_pred(proj, low);
 505                         break;
 506                 default:
 507                         assert(0 && "unexpected Proj number");
 508                 }  /* switch */
 509                 /* mark this proj: we have handled it already, otherwise we might fall into
 510                  * out new nodes. */
 511                 mark_irn_visited(proj);
 512         }  /* for */
 513 }  /* lower_Store */
 514
 515 /**
 516  * Return a node containing the address of the intrinsic emulation function.
 517  *
 518  * @param method  the method type of the emulation function
 519  * @param op      the emulated ir_op
 520  * @param imode   the input mode of the emulated opcode
 521  * @param omode   the output mode of the emulated opcode
 522  * @param block   where the new mode is created
 523  * @param env     the lower environment
 524  */
 525 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 526                                       ir_mode *imode, ir_mode *omode,
 527                                       ir_node *block, lower_env_t *env) {
 528         symconst_symbol sym;
 529         entity *ent;
 530         op_mode_entry_t key, *entry;
 531
 532         key.op    = op;
 533         key.imode = imode;
 534         key.omode = omode;
 535         key.ent   = NULL;
 536
 537         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 538                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 539         if (! entry->ent) {
 540                 /* create a new one */
 541                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 542
 543                 assert(ent && "Intrinsic creator must return an entity");
 544                 entry->ent = ent;
 545         } else {
 546                 ent = entry->ent;
 547         }  /* if */
 548         sym.entity_p = ent;
 549         return new_r_SymConst(current_ir_graph, block, sym, symconst_addr_ent);
 550 }  /* get_intrinsic_address */
 551
 552 /**
 553  * Translate a Div.
 554  *
 555  * Create an intrinsic Call.
 556  */
 557 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env) {
 558         ir_node  *block, *irn, *call, *proj;
 559         ir_node  *in[4];
 560         ir_mode  *opmode;
 561         dbg_info *dbg;
 562         ir_type  *mtp;
 563         int      idx;
 564         ir_graph *irg;
 565         node_entry_t *entry;
 566
 567         irn   = get_Div_left(node);
 568         entry = env->entries[get_irn_idx(irn)];
 569         assert(entry);
 570
 571         if (! entry->low_word) {
 572                 /* not ready yet, wait */
 573                 pdeq_putr(env->waitq, node);
 574                 return;
 575         }  /* if */
 576
 577         in[0] = entry->low_word;
 578         in[1] = entry->high_word;
 579
 580         irn   = get_Div_right(node);
 581         entry = env->entries[get_irn_idx(irn)];
 582         assert(entry);
 583
 584         if (! entry->low_word) {
 585                 /* not ready yet, wait */
 586                 pdeq_putr(env->waitq, node);
 587                 return;
 588         }  /* if */
 589
 590         in[2] = entry->low_word;
 591         in[3] = entry->high_word;
 592
 593         dbg   = get_irn_dbg_info(node);
 594         block = get_nodes_block(node);
 595         irg   = current_ir_graph;
 596
 597         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 598         opmode = get_irn_op_mode(node);
 599         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, block, env);
 600         call = new_rd_Call(dbg, irg, block, get_Div_mem(node),
 601                 irn, 4, in, mtp);
 602         set_irn_pinned(call, get_irn_pinned(node));
 603         irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 604
 605         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 606                 switch (get_Proj_proj(proj)) {
 607                 case pn_Div_M:         /* Memory result. */
 608                         /* reroute to the call */
 609                         set_Proj_pred(proj, call);
 610                         set_Proj_proj(proj, pn_Call_M_except);
 611                         break;
 612                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 613                         /* reroute to the call */
 614                         set_Proj_pred(proj, call);
 615                         set_Proj_proj(proj, pn_Call_X_except);
 616                         break;
 617                 case pn_Div_res:       /* Result of computation. */
 618                         idx = get_irn_idx(proj);
 619                         assert(idx < env->n_entries);
 620                         env->entries[idx]->low_word  = new_r_Proj(current_ir_graph, block, irn, mode, 0);
 621                         env->entries[idx]->high_word = new_r_Proj(current_ir_graph, block, irn, mode, 1);
 622                         break;
 623                 default:
 624                         assert(0 && "unexpected Proj number");
 625                 }  /* switch */
 626                 /* mark this proj: we have handled it already, otherwise we might fall into
 627                  * out new nodes. */
 628                 mark_irn_visited(proj);
 629         }  /* for */
 630 }  /* lower_Div */
 631
 632 /**
 633  * Translate a Mod.
 634  *
 635  * Create an intrinsic Call.
 636  */
 637 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 638         ir_node  *block, *proj, *irn, *call;
 639         ir_node  *in[4];
 640         ir_mode  *opmode;
 641         dbg_info *dbg;
 642         ir_type  *mtp;
 643         int      idx;
 644         ir_graph *irg;
 645         node_entry_t *entry;
 646
 647         irn   = get_Mod_left(node);
 648         entry = env->entries[get_irn_idx(irn)];
 649         assert(entry);
 650
 651         if (! entry->low_word) {
 652                 /* not ready yet, wait */
 653                 pdeq_putr(env->waitq, node);
 654                 return;
 655         }  /* if */
 656
 657         in[0] = entry->low_word;
 658         in[1] = entry->high_word;
 659
 660         irn   = get_Mod_right(node);
 661         entry = env->entries[get_irn_idx(irn)];
 662         assert(entry);
 663
 664         if (! entry->low_word) {
 665                 /* not ready yet, wait */
 666                 pdeq_putr(env->waitq, node);
 667                 return;
 668         }  /* if */
 669
 670         in[2] = entry->low_word;
 671         in[3] = entry->high_word;
 672
 673         dbg   = get_irn_dbg_info(node);
 674         block = get_nodes_block(node);
 675         irg   = current_ir_graph;
 676
 677         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 678         opmode = get_irn_op_mode(node);
 679         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, block, env);
 680         call = new_rd_Call(dbg, irg, block, get_Mod_mem(node),
 681                 irn, 4, in, mtp);
 682         set_irn_pinned(call, get_irn_pinned(node));
 683         irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 684
 685         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 686                 switch (get_Proj_proj(proj)) {
 687                 case pn_Mod_M:         /* Memory result. */
 688                         /* reroute to the call */
 689                         set_Proj_pred(proj, call);
 690                         set_Proj_proj(proj, pn_Call_M_except);
 691                         break;
 692                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 693                         /* reroute to the call */
 694                         set_Proj_pred(proj, call);
 695                         set_Proj_proj(proj, pn_Call_X_except);
 696                         break;
 697                 case pn_Mod_res:       /* Result of computation. */
 698                         idx = get_irn_idx(proj);
 699                         assert(idx < env->n_entries);
 700                         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
 701                         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
 702                         break;
 703                 default:
 704                         assert(0 && "unexpected Proj number");
 705                 }  /* switch */
 706                 /* mark this proj: we have handled it already, otherwise we might fall into
 707                  * out new nodes. */
 708                 mark_irn_visited(proj);
 709         }  /* for */
 710 }  /* lower_Mod */
 711
 712 /**
 713  * Translate a DivMod.
 714  *
 715  * Create two intrinsic Calls.
 716  */
 717 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 718         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod, *resDiv, *resMod;
 719         ir_node  *in[4];
 720         ir_mode  *opmode;
 721         dbg_info *dbg;
 722         ir_type  *mtp;
 723         int      idx;
 724         node_entry_t *entry;
 725         unsigned flags = 0;
 726         ir_graph *irg;
 727
 728         /* check if both results are needed */
 729         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 730                 switch (get_Proj_proj(proj)) {
 731                 case pn_DivMod_res_div: flags |= 1; break;
 732                 case pn_DivMod_res_mod: flags |= 2; break;
 733                 default: break;
 734                 }  /* switch */
 735         }  /* for */
 736
 737         irn   = get_DivMod_left(node);
 738         entry = env->entries[get_irn_idx(irn)];
 739         assert(entry);
 740
 741         if (! entry->low_word) {
 742                 /* not ready yet, wait */
 743                 pdeq_putr(env->waitq, node);
 744                 return;
 745         }  /* if */
 746
 747         in[0] = entry->low_word;
 748         in[1] = entry->high_word;
 749
 750         irn   = get_DivMod_right(node);
 751         entry = env->entries[get_irn_idx(irn)];
 752         assert(entry);
 753
 754         if (! entry->low_word) {
 755                 /* not ready yet, wait */
 756                 pdeq_putr(env->waitq, node);
 757                 return;
 758         }  /* if */
 759
 760         in[2] = entry->low_word;
 761         in[3] = entry->high_word;
 762
 763         dbg   = get_irn_dbg_info(node);
 764         block = get_nodes_block(node);
 765         irg   = current_ir_graph;
 766
 767         mem = get_DivMod_mem(node);
 768
 769         callDiv = callMod = NULL;
 770         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 771         if (flags & 1) {
 772                 opmode = get_irn_op_mode(node);
 773                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, block, env);
 774                 callDiv = new_rd_Call(dbg, irg, block, mem,
 775                         irn, 4, in, mtp);
 776                 set_irn_pinned(callDiv, get_irn_pinned(node));
 777                 resDiv = new_r_Proj(irg, block, callDiv, mode_T, pn_Call_T_result);
 778         }  /* if */
 779         if (flags & 2) {
 780                 if (flags & 1)
 781                         mem = new_r_Proj(irg, block, callDiv, mode_M, pn_Call_M);
 782                 opmode = get_irn_op_mode(node);
 783                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, block, env);
 784                 callMod = new_rd_Call(dbg, irg, block, mem,
 785                         irn, 4, in, mtp);
 786                 set_irn_pinned(callMod, get_irn_pinned(node));
 787                 resMod = new_r_Proj(irg, block, callMod, mode_T, pn_Call_T_result);
 788         }  /* if */
 789
 790         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 791                 switch (get_Proj_proj(proj)) {
 792                 case pn_DivMod_M:         /* Memory result. */
 793                         /* reroute to the first call */
 794                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 795                         set_Proj_proj(proj, pn_Call_M_except);
 796                         break;
 797                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 798                         /* reroute to the first call */
 799                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 800                         set_Proj_proj(proj, pn_Call_X_except);
 801                         break;
 802                 case pn_DivMod_res_div:   /* Result of Div. */
 803                         idx = get_irn_idx(proj);
 804                         assert(idx < env->n_entries);
 805                         env->entries[idx]->low_word  = new_r_Proj(irg, block, resDiv, mode, 0);
 806                         env->entries[idx]->high_word = new_r_Proj(irg, block, resDiv, mode, 1);
 807                         break;
 808                 case pn_DivMod_res_mod:   /* Result of Mod. */
 809                         idx = get_irn_idx(proj);
 810                         env->entries[idx]->low_word  = new_r_Proj(irg, block, resMod, mode, 0);
 811                         env->entries[idx]->high_word = new_r_Proj(irg, block, resMod, mode, 1);
 812                         break;
 813                 default:
 814                         assert(0 && "unexpected Proj number");
 815                 }  /* switch */
 816                 /* mark this proj: we have handled it already, otherwise we might fall into
 817                  * out new nodes. */
 818                 mark_irn_visited(proj);
 819         }  /* for */
 820 }  /* lower_DivMod */
 821
 822 /**
 823  * Translate a Binop.
 824  *
 825  * Create an intrinsic Call.
 826  */
 827 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 828         ir_node  *block, *irn;
 829         ir_node  *in[4];
 830         dbg_info *dbg;
 831         ir_type  *mtp;
 832         int      idx;
 833         ir_graph *irg;
 834         node_entry_t *entry;
 835
 836         irn   = get_binop_left(node);
 837         entry = env->entries[get_irn_idx(irn)];
 838         assert(entry);
 839
 840         if (! entry->low_word) {
 841                 /* not ready yet, wait */
 842                 pdeq_putr(env->waitq, node);
 843                 return;
 844         }  /* if */
 845
 846         in[0] = entry->low_word;
 847         in[1] = entry->high_word;
 848
 849         irn   = get_binop_right(node);
 850         entry = env->entries[get_irn_idx(irn)];
 851         assert(entry);
 852
 853         if (! entry->low_word) {
 854                 /* not ready yet, wait */
 855                 pdeq_putr(env->waitq, node);
 856                 return;
 857         }  /* if */
 858
 859         in[2] = entry->low_word;
 860         in[3] = entry->high_word;
 861
 862         dbg   = get_irn_dbg_info(node);
 863         block = get_nodes_block(node);
 864         irg   = current_ir_graph;
 865
 866         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 867         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
 868         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
 869                 irn, 4, in, mtp);
 870         set_irn_pinned(irn, get_irn_pinned(node));
 871         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
 872
 873         idx = get_irn_idx(node);
 874         assert(idx < env->n_entries);
 875         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
 876         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
 877 }  /* lower_Binop */
 878
 879 /**
 880  * Translate a Shiftop.
 881  *
 882  * Create an intrinsic Call.
 883  */
 884 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 885         ir_node  *block, *irn;
 886         ir_node  *in[3];
 887         dbg_info *dbg;
 888         ir_type  *mtp;
 889         int      idx;
 890         ir_graph *irg;
 891         node_entry_t *entry;
 892
 893         irn   = get_binop_left(node);
 894         entry = env->entries[get_irn_idx(irn)];
 895         assert(entry);
 896
 897         if (! entry->low_word) {
 898                 /* not ready yet, wait */
 899                 pdeq_putr(env->waitq, node);
 900                 return;
 901         }  /* if */
 902
 903         in[0] = entry->low_word;
 904         in[1] = entry->high_word;
 905
 906         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 907         in[2] = get_binop_right(node);
 908
 909         dbg   = get_irn_dbg_info(node);
 910         block = get_nodes_block(node);
 911         irg  = current_ir_graph;
 912
 913         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 914         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
 915         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
 916                 irn, 3, in, mtp);
 917         set_irn_pinned(irn, get_irn_pinned(node));
 918         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
 919
 920         idx = get_irn_idx(node);
 921         assert(idx < env->n_entries);
 922         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
 923         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
 924 }  /* lower_Shiftop */
 925
 926 /**
 927  * Translate a Shr and handle special cases.
 928  */
 929 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env) {
 930         ir_node  *right = get_Shr_right(node);
 931         ir_graph *irg = current_ir_graph;
 932
 933         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 934                 tarval *tv = get_Const_tarval(right);
 935
 936                 if (tarval_is_long(tv) &&
 937                         get_tarval_long(tv) >= get_mode_size_bits(mode)) {
 938                         ir_node *block = get_nodes_block(node);
 939                         ir_node *left = get_Shr_left(node);
 940                         ir_node *c;
 941                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 942                         int idx = get_irn_idx(left);
 943
 944                         left = env->entries[idx]->high_word;
 945                         idx = get_irn_idx(node);
 946
 947                         if (shf_cnt > 0) {
 948                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
 949                                 env->entries[idx]->low_word = new_r_Shr(irg, block, left, c, mode);
 950                         } else {
 951                                 env->entries[idx]->low_word = left;
 952                         }  /* if */
 953                         env->entries[idx]->high_word = new_r_Const(irg, block, mode, get_mode_null(mode));
 954
 955                         return;
 956                 }  /* if */
 957         }  /* if */
 958         lower_Shiftop(node, mode, env);
 959 }  /* lower_Shr */
 960
 961 /**
 962  * Translate a Shl and handle special cases.
 963  */
 964 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env) {
 965         ir_node  *right = get_Shl_right(node);
 966         ir_graph *irg = current_ir_graph;
 967
 968         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 969                 tarval *tv = get_Const_tarval(right);
 970
 971                 if (tarval_is_long(tv) &&
 972                         get_tarval_long(tv) >= get_mode_size_bits(mode)) {
 973                         ir_node *block = get_nodes_block(node);
 974                         ir_node *left = get_Shl_left(node);
 975                         ir_node *c;
 976                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 977                         int idx = get_irn_idx(left);
 978
 979                         left = env->entries[idx]->low_word;
 980                         idx = get_irn_idx(node);
 981
 982                         if (shf_cnt > 0) {
 983                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
 984                                 env->entries[idx]->high_word = new_r_Shl(irg, block, left, c, mode);
 985                         } else {
 986                                 env->entries[idx]->high_word = left;
 987                         }  /* if */
 988                         env->entries[idx]->low_word  = new_r_Const(irg, block, mode, get_mode_null(mode));
 989
 990                         return;
 991                 }  /* if */
 992         }  /* if */
 993         lower_Shiftop(node, mode, env);
 994 }  /* lower_Shl */
 995
 996 /**
 997  * Translate a Shrs and handle special cases.
 998  */
 999 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env) {
1000         ir_node  *right = get_Shrs_right(node);
1001         ir_graph *irg = current_ir_graph;
1002
1003         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1004                 tarval *tv = get_Const_tarval(right);
1005
1006                 if (tarval_is_long(tv) &&
1007                         get_tarval_long(tv) >= get_mode_size_bits(mode)) {
1008                         ir_node *block = get_nodes_block(node);
1009                         ir_node *left = get_Shrs_left(node);
1010                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
1011                         ir_node *c;
1012                         int idx = get_irn_idx(left);
1013
1014                         left = env->entries[idx]->high_word;
1015                         idx = get_irn_idx(node);
1016
1017                         if (shf_cnt > 0) {
1018                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
1019                                 env->entries[idx]->low_word = new_r_Shrs(irg, block, left, c, mode);
1020                         } else {
1021                                 env->entries[idx]->low_word = left;
1022                         }  /* if */
1023                         c = new_r_Const_long(irg, block, mode_Iu, get_mode_size_bits(mode) - 1);
1024                         env->entries[idx]->high_word = new_r_Shrs(irg, block, left, c, mode);
1025
1026                         return;
1027                 }  /* if */
1028         }  /* if */
1029         lower_Shiftop(node, mode, env);
1030 }  /* lower_Shrs */
1031
1032 /**
1033  * Translate a Rot and handle special cases.
1034  */
1035 static void lower_Rot(ir_node *node, ir_mode *mode, lower_env_t *env) {
1036         ir_node  *right = get_Rot_right(node);
1037
1038         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1039                 tarval *tv = get_Const_tarval(right);
1040
1041                 if (tarval_is_long(tv) &&
1042                         get_tarval_long(tv) == get_mode_size_bits(mode)) {
1043                         ir_node *left = get_Rot_left(node);
1044                         ir_node *h, *l;
1045                         int idx = get_irn_idx(left);
1046
1047                         l = env->entries[idx]->low_word;
1048                         h = env->entries[idx]->high_word;
1049                         idx = get_irn_idx(node);
1050
1051                         env->entries[idx]->low_word  = h;
1052                         env->entries[idx]->high_word = l;
1053
1054                         return;
1055                 }  /* if */
1056         }  /* if */
1057         lower_Shiftop(node, mode, env);
1058 }  /* lower_Rot */
1059
1060 /**
1061  * Translate an Unop.
1062  *
1063  * Create an intrinsic Call.
1064  */
1065 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env) {
1066         ir_node  *block, *irn;
1067         ir_node  *in[2];
1068         dbg_info *dbg;
1069         ir_type  *mtp;
1070         int      idx;
1071         ir_graph *irg;
1072         node_entry_t *entry;
1073
1074         irn   = get_unop_op(node);
1075         entry = env->entries[get_irn_idx(irn)];
1076         assert(entry);
1077
1078         if (! entry->low_word) {
1079                 /* not ready yet, wait */
1080                 pdeq_putr(env->waitq, node);
1081                 return;
1082         }  /* if */
1083
1084         in[0] = entry->low_word;
1085         in[1] = entry->high_word;
1086
1087         dbg   = get_irn_dbg_info(node);
1088         block = get_nodes_block(node);
1089         irg   = current_ir_graph;
1090
1091         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1092         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
1093         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
1094                 irn, 2, in, mtp);
1095         set_irn_pinned(irn, get_irn_pinned(node));
1096         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
1097
1098         idx = get_irn_idx(node);
1099         assert(idx < env->n_entries);
1100         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, mode, 0);
1101         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode, 1);
1102 }  /* lower_Unop */
1103
1104 /**
1105  * Translate a logical Binop.
1106  *
1107  * Create two logical Binops.
1108  */
1109 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1110                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_graph *irg, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1111         ir_node  *block, *irn;
1112         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1113         dbg_info *dbg;
1114         int      idx;
1115         ir_graph *irg;
1116         node_entry_t *entry;
1117
1118         irn   = get_binop_left(node);
1119         entry = env->entries[get_irn_idx(irn)];
1120         assert(entry);
1121
1122         if (! entry->low_word) {
1123                 /* not ready yet, wait */
1124                 pdeq_putr(env->waitq, node);
1125                 return;
1126         }  /* if */
1127
1128         lop_l = entry->low_word;
1129         lop_h = entry->high_word;
1130
1131         irn   = get_binop_right(node);
1132         entry = env->entries[get_irn_idx(irn)];
1133         assert(entry);
1134
1135         if (! entry->low_word) {
1136                 /* not ready yet, wait */
1137                 pdeq_putr(env->waitq, node);
1138                 return;
1139         }  /* if */
1140
1141         rop_l = entry->low_word;
1142         rop_h = entry->high_word;
1143
1144         dbg = get_irn_dbg_info(node);
1145         block = get_nodes_block(node);
1146
1147         idx = get_irn_idx(node);
1148         assert(idx < env->n_entries);
1149         irg = current_ir_graph;
1150         env->entries[idx]->low_word  = constr_rd(dbg, irg, block, lop_l, rop_l, mode);
1151         env->entries[idx]->high_word = constr_rd(dbg, irg, block, lop_h, rop_h, mode);
1152 }  /* lower_Binop_logical */
1153
1154 /** create a logical operation tranformation */
1155 #define lower_logical(op)                                                \
1156 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1157         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1158 }
1159
1160 lower_logical(And)
1161 lower_logical(Or)
1162 lower_logical(Eor)
1163
1164 /**
1165  * Translate a Not.
1166  *
1167  * Create two logical Nots.
1168  */
1169 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env) {
1170         ir_node  *block, *irn;
1171         ir_node  *op_l, *op_h;
1172         dbg_info *dbg;
1173         int      idx;
1174         ir_graph *irg;
1175         node_entry_t *entry;
1176
1177         irn   = get_Not_op(node);
1178         entry = env->entries[get_irn_idx(irn)];
1179         assert(entry);
1180
1181         if (! entry->low_word) {
1182                 /* not ready yet, wait */
1183                 pdeq_putr(env->waitq, node);
1184                 return;
1185         }  /* if */
1186
1187         op_l = entry->low_word;
1188         op_h = entry->high_word;
1189
1190         dbg   = get_irn_dbg_info(node);
1191         block = get_nodes_block(node);
1192         irg   = current_ir_graph;
1193
1194         idx = get_irn_idx(node);
1195         assert(idx < env->n_entries);
1196         env->entries[idx]->low_word  = new_rd_Not(dbg, current_ir_graph, block, op_l, mode);
1197         env->entries[idx]->high_word = new_rd_Not(dbg, current_ir_graph, block, op_h, mode);
1198 }  /* lower_Not */
1199
1200 /**
1201  * Translate a Minus.
1202  *
1203  * Create two Minus'.
1204  */
1205 static void lower_Minus(ir_node *node, ir_mode *mode, lower_env_t *env) {
1206         ir_node  *block, *irn;
1207         ir_node  *op_l, *op_h;
1208         dbg_info *dbg;
1209         int      idx;
1210         ir_graph *irg;
1211         node_entry_t *entry;
1212
1213         irn   = get_Minus_op(node);
1214         entry = env->entries[get_irn_idx(irn)];
1215         assert(entry);
1216
1217         if (! entry->low_word) {
1218                 /* not ready yet, wait */
1219                 pdeq_putr(env->waitq, node);
1220                 return;
1221         }  /* if */
1222
1223         op_l = entry->low_word;
1224         op_h = entry->high_word;
1225
1226         dbg   = get_irn_dbg_info(node);
1227         block = get_nodes_block(node);
1228         irg   = current_ir_graph;
1229
1230         idx = get_irn_idx(node);
1231         assert(idx < env->n_entries);
1232         env->entries[idx]->low_word  = new_rd_Minus(dbg, current_ir_graph, block, op_l, mode);
1233         env->entries[idx]->high_word = new_rd_Minus(dbg, current_ir_graph, block, op_h, mode);
1234 }  /* lower_Minus */
1235
1236 /**
1237  * Translate a Cond.
1238  */
1239 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
1240         ir_node *cmp, *left, *right, *block;
1241         ir_node *sel = get_Cond_selector(node);
1242         ir_mode *m = get_irn_mode(sel);
1243         int     idx;
1244
1245         if (m == mode_b) {
1246                 node_entry_t *lentry, *rentry;
1247                 ir_node  *proj, *projT = NULL, *projF = NULL;
1248                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1249                 ir_node  *projHF, *projHT;
1250                 ir_node  *dst_blk;
1251                 ir_graph *irg;
1252                 pn_Cmp   pnc;
1253                 dbg_info *dbg;
1254
1255                 cmp   = get_Proj_pred(sel);
1256                 left  = get_Cmp_left(cmp);
1257                 idx   = get_irn_idx(left);
1258                 lentry = env->entries[idx];
1259
1260                 if (! lentry) {
1261                         /* a normal Cmp */
1262                         return;
1263                 }  /* if */
1264
1265                 right = get_Cmp_right(cmp);
1266                 idx   = get_irn_idx(right);
1267                 rentry = env->entries[idx];
1268                 assert(rentry);
1269
1270                 if (! lentry->low_word || !rentry->low_word) {
1271                         /* not yet ready */
1272                         pdeq_putr(env->waitq, node);
1273                         return;
1274                 }  /* if */
1275
1276                 /* all right, build the code */
1277                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1278                         long proj_nr = get_Proj_proj(proj);
1279
1280                         if (proj_nr == pn_Cond_true) {
1281                                 assert(projT == NULL && "more than one Proj(true)");
1282                                 projT = proj;
1283                         } else {
1284                                 assert(proj_nr == pn_Cond_false);
1285                                 assert(projF == NULL && "more than one Proj(false)");
1286                                 projF = proj;
1287                         }  /* if */
1288                         mark_irn_visited(proj);
1289                 }  /* for */
1290                 assert(projT && projF);
1291
1292                 /* create a new high compare */
1293                 block = get_nodes_block(cmp);
1294                 dbg   = get_irn_dbg_info(cmp);
1295                 irg   = current_ir_graph;
1296
1297                 cmpH = new_rd_Cmp(dbg, irg, block, lentry->high_word, rentry->high_word);
1298
1299                 pnc = get_Proj_proj(sel);
1300                 if (pnc == pn_Cmp_Eq) {
1301                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1302                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1303
1304                         assert(entry);
1305                         dst_blk = entry->value;
1306
1307                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Eq);
1308                         dbg = get_irn_dbg_info(node);
1309                         irn = new_rd_Cond(dbg, irg, block, irn);
1310
1311                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1312                         mark_irn_visited(projHF);
1313                         exchange(projF, projHF);
1314
1315                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1316                         mark_irn_visited(projHT);
1317
1318                         new_bl = new_r_Block(irg, 1, &projHT);
1319
1320                         dbg   = get_irn_dbg_info(cmp);
1321                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1322                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Eq);
1323                         dbg = get_irn_dbg_info(node);
1324                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1325
1326                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1327                         mark_irn_visited(proj);
1328                         add_block_cf_input(dst_blk, projHF, proj);
1329
1330                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1331                         mark_irn_visited(proj);
1332                         exchange(projT, proj);
1333                 } else if (pnc == pn_Cmp_Lg) {
1334                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1335                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1336
1337                         assert(entry);
1338                         dst_blk = entry->value;
1339
1340                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Lg);
1341                         dbg = get_irn_dbg_info(node);
1342                         irn = new_rd_Cond(dbg, irg, block, irn);
1343
1344                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1345                         mark_irn_visited(projHT);
1346                         exchange(projT, projHT);
1347
1348                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1349                         mark_irn_visited(projHF);
1350
1351                         new_bl = new_r_Block(irg, 1, &projHF);
1352
1353                         dbg   = get_irn_dbg_info(cmp);
1354                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1355                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Lg);
1356                         dbg = get_irn_dbg_info(node);
1357                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1358
1359                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1360                         mark_irn_visited(proj);
1361                         add_block_cf_input(dst_blk, projHT, proj);
1362
1363                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1364                         mark_irn_visited(proj);
1365                         exchange(projF, proj);
1366                 } else {
1367                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1368                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1369                         pmap_entry *entry;
1370
1371                         entry = pmap_find(env->proj_2_block, projT);
1372                         assert(entry);
1373                         dstT = entry->value;
1374
1375                         entry = pmap_find(env->proj_2_block, projF);
1376                         assert(entry);
1377                         dstF = entry->value;
1378
1379                         irn = new_r_Proj(irg, block, cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1380                         dbg = get_irn_dbg_info(node);
1381                         irn = new_rd_Cond(dbg, irg, block, irn);
1382
1383                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1384                         mark_irn_visited(projHT);
1385                         exchange(projT, projHT);
1386                         projT = projHT;
1387
1388                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1389                         mark_irn_visited(projHF);
1390
1391                         newbl_eq = new_r_Block(irg, 1, &projHF);
1392
1393                         irn = new_r_Proj(irg, newbl_eq, cmpH, mode_b, pn_Cmp_Eq);
1394                         irn = new_rd_Cond(dbg, irg, newbl_eq, irn);
1395
1396                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_false);
1397                         mark_irn_visited(proj);
1398                         exchange(projF, proj);
1399                         projF = proj;
1400
1401                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_true);
1402                         mark_irn_visited(proj);
1403
1404                         newbl_l = new_r_Block(irg, 1, &proj);
1405
1406                         dbg   = get_irn_dbg_info(cmp);
1407                         cmpL = new_rd_Cmp(dbg, irg, newbl_l, lentry->low_word, rentry->low_word);
1408                         irn = new_r_Proj(irg, newbl_l, cmpL, mode_b, pnc);
1409                         dbg = get_irn_dbg_info(node);
1410                         irn = new_rd_Cond(dbg, irg, newbl_l, irn);
1411
1412                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_true);
1413                         mark_irn_visited(proj);
1414                         add_block_cf_input(dstT, projT, proj);
1415
1416                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_false);
1417                         mark_irn_visited(proj);
1418                         add_block_cf_input(dstF, projF, proj);
1419                 }  /* if */
1420
1421                 /* we have changed the control flow */
1422                 env->flags |= CF_CHANGED;
1423         } else {
1424                 idx = get_irn_idx(sel);
1425
1426                 if (env->entries[idx]) {
1427                         /*
1428                            Bad, a jump-table with double-word index.
1429                            This should not happen, but if it does we handle
1430                            it like a Conv were between (in other words, ignore
1431                            the high part.
1432                          */
1433
1434                         if (! env->entries[idx]->low_word) {
1435                                 /* not ready yet, wait */
1436                                 pdeq_putr(env->waitq, node);
1437                                 return;
1438                         }  /* if */
1439                         set_Cond_selector(node, env->entries[idx]->low_word);
1440                 }  /* if */
1441         }  /* if */
1442 }  /* lower_Cond */
1443
1444 /**
1445  * Translate a Conv to higher_signed
1446  */
1447 static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
1448         ir_node  *op    = get_Conv_op(node);
1449         ir_mode  *imode = get_irn_mode(op);
1450         ir_mode  *dst_mode = env->params->low_signed;
1451         int      idx = get_irn_idx(node);
1452         ir_graph *irg = current_ir_graph;
1453         ir_node  *block = get_nodes_block(node);
1454         dbg_info *dbg = get_irn_dbg_info(node);
1455
1456         assert(idx < env->n_entries);
1457
1458         if (mode_is_int(imode) || mode_is_reference(imode)) {
1459                 if (imode == env->params->high_unsigned) {
1460                         /* a Conv from Lu to Ls */
1461                         int op_idx = get_irn_idx(op);
1462
1463                         if (! env->entries[op_idx]->low_word) {
1464                                 /* not ready yet, wait */
1465                                 pdeq_putr(env->waitq, node);
1466                                 return;
1467                         }  /* if */
1468                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word, dst_mode);
1469                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode);
1470                 } else {
1471                         /* simple case: create a high word */
1472                         if (imode != dst_mode)
1473                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode);
1474
1475                         env->entries[idx]->low_word  = op;
1476                         env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op,
1477                                 new_Const_long(mode_Iu, get_mode_size_bits(dst_mode) - 1), dst_mode);
1478                 }  /* if */
1479         } else {
1480                 ir_node *irn, *call;
1481                 ir_mode *omode = env->params->high_signed;
1482                 ir_type *mtp = get_conv_type(imode, omode, env);
1483
1484                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1485                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1486                 set_irn_pinned(call, get_irn_pinned(node));
1487                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1488
1489                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode, 0);
1490                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode, 1);
1491         }  /* if */
1492 }  /* lower_Conv_to_Ls */
1493
1494 /**
1495  * Translate a Conv to higher_unsigned
1496  */
1497 static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
1498         ir_node  *op    = get_Conv_op(node);
1499         ir_mode  *imode = get_irn_mode(op);
1500         ir_mode  *dst_mode = env->params->low_unsigned;
1501         int      idx = get_irn_idx(node);
1502         ir_graph *irg = current_ir_graph;
1503         ir_node  *block = get_nodes_block(node);
1504         dbg_info *dbg = get_irn_dbg_info(node);
1505
1506         assert(idx < env->n_entries);
1507
1508         if (mode_is_int(imode) || mode_is_reference(imode)) {
1509                 if (imode == env->params->high_signed) {
1510                         /* a Conv from Ls to Lu */
1511                         int op_idx = get_irn_idx(op);
1512
1513                         if (! env->entries[op_idx]->low_word) {
1514                                 /* not ready yet, wait */
1515                                 pdeq_putr(env->waitq, node);
1516                                 return;
1517                         }  /* if */
1518                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word, dst_mode);
1519                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode);
1520                 } else {
1521                         /* simple case: create a high word */
1522                         if (imode != dst_mode)
1523                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode);
1524
1525                         env->entries[idx]->low_word  = op;
1526                         env->entries[idx]->high_word = new_Const(dst_mode, get_mode_null(dst_mode));
1527                 }  /* if */
1528         } else {
1529                 ir_node *irn, *call;
1530                 ir_mode *omode = env->params->high_unsigned;
1531                 ir_type *mtp = get_conv_type(imode, omode, env);
1532
1533                 /* do an intrinsic call */
1534                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1535                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1536                 set_irn_pinned(call, get_irn_pinned(node));
1537                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1538
1539                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode, 0);
1540                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode, 1);
1541         }  /* if */
1542 }  /* lower_Conv_to_Lu */
1543
1544 /**
1545  * Translate a Conv from higher_signed
1546  */
1547 static void lower_Conv_from_Ls(ir_node *node, lower_env_t *env) {
1548         ir_node  *op    = get_Conv_op(node);
1549         ir_mode  *omode = get_irn_mode(node);
1550         ir_node  *block = get_nodes_block(node);
1551         dbg_info *dbg = get_irn_dbg_info(node);
1552         int      idx = get_irn_idx(op);
1553         ir_graph *irg = current_ir_graph;
1554
1555         assert(idx < env->n_entries);
1556
1557         if (mode_is_int(omode) || mode_is_reference(omode)) {
1558                 op = env->entries[idx]->low_word;
1559
1560                 /* simple case: create a high word */
1561                 if (omode != env->params->low_signed)
1562                         op = new_rd_Conv(dbg, irg, block, op, omode);
1563
1564                 set_Conv_op(node, op);
1565         } else {
1566                 ir_node *irn, *call, *in[2];
1567                 ir_mode *imode = env->params->high_signed;
1568                 ir_type *mtp = get_conv_type(imode, omode, env);
1569
1570                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1571                 in[0] = env->entries[idx]->low_word;
1572                 in[1] = env->entries[idx]->high_word;
1573
1574                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1575                 set_irn_pinned(call, get_irn_pinned(node));
1576                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1577
1578                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1579         }  /* if */
1580 }  /* lower_Conv_from_Ls */
1581
1582 /**
1583  * Translate a Conv from higher_unsigned
1584  */
1585 static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
1586         ir_node  *op    = get_Conv_op(node);
1587         ir_mode  *omode = get_irn_mode(node);
1588         ir_node  *block = get_nodes_block(node);
1589         dbg_info *dbg = get_irn_dbg_info(node);
1590         int      idx = get_irn_idx(op);
1591         ir_graph *irg = current_ir_graph;
1592
1593         assert(idx < env->n_entries);
1594
1595         if (mode_is_int(omode) || mode_is_reference(omode)) {
1596                 op = env->entries[idx]->low_word;
1597
1598                 /* simple case: create a high word */
1599                 if (omode != env->params->low_unsigned)
1600                         op = new_rd_Conv(dbg, irg, block, op, omode);
1601
1602                 set_Conv_op(node, op);
1603         } else {
1604                 ir_node *irn, *call, *in[2];
1605                 ir_mode *imode = env->params->high_unsigned;
1606                 ir_type *mtp = get_conv_type(imode, omode, env);
1607
1608                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1609                 in[0] = env->entries[idx]->low_word;
1610                 in[1] = env->entries[idx]->high_word;
1611
1612                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1613                 set_irn_pinned(call, get_irn_pinned(node));
1614                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1615
1616                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1617         }  /* if */
1618 }  /* lower_Conv_from_Lu */
1619
1620 /**
1621  * Translate a Conv.
1622  */
1623 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env) {
1624         mode = get_irn_mode(node);
1625
1626         if (mode == env->params->high_signed) {
1627                 lower_Conv_to_Ls(node, env);
1628         } else if (mode == env->params->high_unsigned) {
1629                 lower_Conv_to_Lu(node, env);
1630         } else {
1631                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1632
1633                 if (mode == env->params->high_signed) {
1634                         lower_Conv_from_Ls(node, env);
1635         } else if (mode == env->params->high_unsigned) {
1636                         lower_Conv_from_Lu(node, env);
1637                 }  /* if */
1638         }  /* if */
1639 }  /* lower_Conv */
1640
1641 /**
1642  * Lower the method type.
1643  */
1644 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
1645         pmap_entry *entry;
1646         ident      *id;
1647         ir_type    *res;
1648
1649         if (is_lowered_type(mtp))
1650                 return mtp;
1651
1652         entry = pmap_find(lowered_type, mtp);
1653         if (! entry) {
1654                 int i, n, r, n_param, n_res;
1655
1656                 /* count new number of params */
1657                 n_param = n = get_method_n_params(mtp);
1658                 for (i = n_param - 1; i >= 0; --i) {
1659                         ir_type *tp = get_method_param_type(mtp, i);
1660
1661                         if (is_Primitive_type(tp)) {
1662                                 ir_mode *mode = get_type_mode(tp);
1663
1664                                 if (mode == env->params->high_signed ||
1665                                         mode == env->params->high_unsigned)
1666                                         ++n_param;
1667                         }  /* if */
1668                 }  /* for */
1669
1670                 /* count new number of results */
1671                 n_res = r = get_method_n_ress(mtp);
1672                 for (i = n_res - 1; i >= 0; --i) {
1673                         ir_type *tp = get_method_res_type(mtp, i);
1674
1675                         if (is_Primitive_type(tp)) {
1676                                 ir_mode *mode = get_type_mode(tp);
1677
1678                                 if (mode == env->params->high_signed ||
1679                                         mode == env->params->high_unsigned)
1680                                         ++n_res;
1681                         }  /* if */
1682                 }  /* for */
1683
1684                 id = mangle_u(new_id_from_chars("L", 1), get_type_ident(mtp));
1685                 res = new_type_method(id, n_param, n_res);
1686
1687                 /* set param types and result types */
1688                 for (i = n_param = 0; i < n; ++i) {
1689                         ir_type *tp = get_method_param_type(mtp, i);
1690
1691                         if (is_Primitive_type(tp)) {
1692                                 ir_mode *mode = get_type_mode(tp);
1693
1694                                 if (mode == env->params->high_signed) {
1695                                         set_method_param_type(res, n_param++, tp_s);
1696                                         set_method_param_type(res, n_param++, tp_s);
1697                                 } else if (mode == env->params->high_unsigned) {
1698                                         set_method_param_type(res, n_param++, tp_u);
1699                                         set_method_param_type(res, n_param++, tp_u);
1700                                 } else {
1701                                         set_method_param_type(res, n_param++, tp);
1702                                 }  /* if */
1703                         } else {
1704                                 set_method_param_type(res, n_param++, tp);
1705                         }  /* if */
1706                 }  /* for */
1707                 for (i = n_res = 0; i < r; ++i) {
1708                         ir_type *tp = get_method_res_type(mtp, i);
1709
1710                         if (is_Primitive_type(tp)) {
1711                                 ir_mode *mode = get_type_mode(tp);
1712
1713                                 if (mode == env->params->high_signed) {
1714                                         set_method_res_type(res, n_res++, tp_s);
1715                                         set_method_res_type(res, n_res++, tp_s);
1716                                 } else if (mode == env->params->high_unsigned) {
1717                                         set_method_res_type(res, n_res++, tp_u);
1718                                         set_method_res_type(res, n_res++, tp_u);
1719                                 } else {
1720                                         set_method_res_type(res, n_res++, tp);
1721                                 }  /* if */
1722                         } else {
1723                                 set_method_res_type(res, n_res++, tp);
1724                         }  /* if */
1725                 }  /* for */
1726                 set_lowered_type(mtp, res);
1727                 pmap_insert(lowered_type, mtp, res);
1728         } else {
1729                 res = entry->value;
1730         }  /* if */
1731         return res;
1732 }  /* lower_mtp */
1733
1734 /**
1735  * Translate a Return.
1736  */
1737 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
1738         ir_graph *irg = current_ir_graph;
1739         entity   *ent = get_irg_entity(irg);
1740         ir_type  *mtp = get_entity_type(ent);
1741         ir_node  **in;
1742         int      i, j, n, idx;
1743         int      need_conv = 0;
1744
1745         /* check if this return must be lowered */
1746         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1747                 ir_node *pred = get_Return_res(node, i);
1748                 ir_mode *mode = get_irn_op_mode(pred);
1749
1750                 if (mode == env->params->high_signed ||
1751                         mode == env->params->high_unsigned) {
1752                         idx = get_irn_idx(pred);
1753                         if (! env->entries[idx]->low_word) {
1754                                 /* not ready yet, wait */
1755                                 pdeq_putr(env->waitq, node);
1756                                 return;
1757                         }  /* if */
1758                         need_conv = 1;
1759                 }  /* if */
1760         }  /* for */
1761         if (! need_conv)
1762                 return;
1763
1764         ent = get_irg_entity(irg);
1765         mtp = get_entity_type(ent);
1766
1767         mtp = lower_mtp(mtp, env);
1768         set_entity_type(ent, mtp);
1769
1770         /* create a new in array */
1771         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1772         in[0] = get_Return_mem(node);
1773
1774         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1775                 ir_node *pred = get_Return_res(node, i);
1776
1777                 idx = get_irn_idx(pred);
1778                 assert(idx < env->n_entries);
1779
1780                 if (env->entries[idx]) {
1781                         in[++j] = env->entries[idx]->low_word;
1782                         in[++j] = env->entries[idx]->high_word;
1783                 } else {
1784                         in[++j] = pred;
1785                 }  /* if */
1786         }  /* for */
1787
1788         set_irn_in(node, j+1, in);
1789 }  /* lower_Return */
1790
1791 /**
1792  * Translate the parameters.
1793  */
1794 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env) {
1795         ir_graph *irg = current_ir_graph;
1796         entity   *ent = get_irg_entity(irg);
1797         ir_type  *tp  = get_entity_type(ent);
1798         ir_type  *mtp;
1799         long     *new_projs;
1800         int      i, j, n_params, rem;
1801         ir_node  *proj, *args;
1802
1803         if (is_lowered_type(tp)) {
1804                 mtp = get_associated_type(tp);
1805         } else {
1806                 mtp = tp;
1807         }  /* if */
1808         assert(! is_lowered_type(mtp));
1809
1810         n_params = get_method_n_params(mtp);
1811         if (n_params <= 0)
1812                 return;
1813
1814         NEW_ARR_A(long, new_projs, n_params);
1815
1816         /* first check if we have parameters that must be fixed */
1817         for (i = j = 0; i < n_params; ++i, ++j) {
1818                 ir_type *tp = get_method_param_type(mtp, i);
1819
1820                 new_projs[i] = j;
1821                 if (is_Primitive_type(tp)) {
1822                         ir_mode *mode = get_type_mode(tp);
1823
1824                         if (mode == env->params->high_signed ||
1825                                 mode == env->params->high_unsigned)
1826                                 ++j;
1827                 }  /* if */
1828         }  /* for */
1829         if (i == j)
1830                 return;
1831
1832         mtp = lower_mtp(mtp, env);
1833         set_entity_type(ent, mtp);
1834
1835         /* switch off optimization for new Proj nodes or they might be CSE'ed
1836            with not patched one's */
1837         rem = get_optimize();
1838         set_optimize(0);
1839
1840         /* ok, fix all Proj's and create new ones */
1841         args = get_irg_args(irg);
1842         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1843                 ir_node *pred = get_Proj_pred(proj);
1844                 long proj_nr;
1845                 int idx;
1846                 ir_mode *mode;
1847                 dbg_info *dbg;
1848
1849                 /* do not visit this node again */
1850                 mark_irn_visited(proj);
1851
1852                 if (pred != args)
1853                         continue;
1854
1855                 proj_nr = get_Proj_proj(proj);
1856                 set_Proj_proj(proj, new_projs[proj_nr]);
1857
1858                 idx = get_irn_idx(proj);
1859                 if (env->entries[idx]) {
1860                         mode = get_irn_mode(proj);
1861
1862                         if (mode == env->params->high_signed) {
1863                                 mode = env->params->low_signed;
1864                         } else {
1865                                 mode = env->params->low_unsigned;
1866                         }  /* if */
1867
1868                         dbg = get_irn_dbg_info(proj);
1869                         env->entries[idx]->low_word  =
1870                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, mode, new_projs[proj_nr]);
1871                         env->entries[idx]->high_word =
1872                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, mode, new_projs[proj_nr] + 1);
1873                 }  /* if */
1874         }  /* for */
1875         set_optimize(rem);
1876 }  /* lower_Start */
1877
1878 /**
1879  * Translate a Call.
1880  */
1881 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
1882         ir_graph *irg = current_ir_graph;
1883         ir_type  *tp = get_Call_type(node);
1884         ir_type  *call_tp;
1885         ir_node  **in, *proj, *results;
1886         int      n_params, n_res, need_lower = 0;
1887         int      i, j;
1888         long     *res_numbers = NULL;
1889
1890         if (is_lowered_type(tp)) {
1891                 call_tp = get_associated_type(tp);
1892         } else {
1893                 call_tp = tp;
1894         }  /* if */
1895
1896         assert(! is_lowered_type(call_tp));
1897
1898         n_params = get_method_n_params(call_tp);
1899         for (i = 0; i < n_params; ++i) {
1900                 ir_type *tp = get_method_param_type(call_tp, i);
1901
1902                 if (is_Primitive_type(tp)) {
1903                         ir_mode *mode = get_type_mode(tp);
1904
1905                         if (mode == env->params->high_signed ||
1906                                 mode == env->params->high_unsigned) {
1907                                 need_lower = 1;
1908                                 break;
1909                         }  /* if */
1910                 }  /* if */
1911         }  /* for */
1912         n_res = get_method_n_ress(call_tp);
1913         if (n_res > 0) {
1914                 NEW_ARR_A(long, res_numbers, n_res);
1915
1916                 for (i = j = 0; i < n_res; ++i, ++j) {
1917                         ir_type *tp = get_method_res_type(call_tp, i);
1918
1919                         res_numbers[i] = j;
1920                         if (is_Primitive_type(tp)) {
1921                                 ir_mode *mode = get_type_mode(tp);
1922
1923                                 if (mode == env->params->high_signed ||
1924                                         mode == env->params->high_unsigned) {
1925                                         need_lower = 1;
1926                                         ++j;
1927                                 }  /* if */
1928                         }  /* if */
1929                 }  /* for */
1930         }  /* if */
1931
1932         if (! need_lower)
1933                 return;
1934
1935         /* let's lower it */
1936         call_tp = lower_mtp(call_tp, env);
1937         set_Call_type(node, call_tp);
1938
1939         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1940
1941         in[0] = get_Call_mem(node);
1942         in[1] = get_Call_ptr(node);
1943
1944         for (j = 2, i = 0; i < n_params; ++i) {
1945                 ir_node *pred = get_Call_param(node, i);
1946                 int     idx = get_irn_idx(pred);
1947
1948                 if (env->entries[idx]) {
1949                         if (! env->entries[idx]->low_word) {
1950                                 /* not ready yet, wait */
1951                                 pdeq_putr(env->waitq, node);
1952                                 return;
1953                         }
1954                         in[j++] = env->entries[idx]->low_word;
1955                         in[j++] = env->entries[idx]->high_word;
1956                 } else {
1957                         in[j++] = pred;
1958                 }  /* if */
1959         }  /* for */
1960
1961         set_irn_in(node, j, in);
1962
1963         /* fix the results */
1964         results = NULL;
1965         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1966                 long proj_nr = get_Proj_proj(proj);
1967
1968                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
1969                         /* found the result proj */
1970                         results = proj;
1971                         break;
1972                 }  /* if */
1973         }  /* for */
1974
1975         if (results) {          /* there are results */
1976                 int rem = get_optimize();
1977
1978                 /* switch off optimization for new Proj nodes or they might be CSE'ed
1979                    with not patched one's */
1980                 set_optimize(0);
1981                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
1982                         if (get_Proj_pred(proj) == results) {
1983                                 long proj_nr = get_Proj_proj(proj);
1984                                 int idx;
1985
1986                                 /* found a result */
1987                                 set_Proj_proj(proj, res_numbers[proj_nr]);
1988                                 idx = get_irn_idx(proj);
1989                                 if (env->entries[idx]) {
1990                                         ir_mode *mode = get_irn_mode(proj);
1991                                         dbg_info *dbg;
1992
1993                                         if (mode == env->params->high_signed) {
1994                                                 mode = env->params->low_signed;
1995                                         } else {
1996                                                 mode = env->params->low_unsigned;
1997                                         }  /* if */
1998
1999                                         dbg = get_irn_dbg_info(proj);
2000                                         env->entries[idx]->low_word  =
2001                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, mode, res_numbers[proj_nr]);
2002                                         env->entries[idx]->high_word =
2003                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, mode, res_numbers[proj_nr] + 1);
2004                                 }  /* if */
2005                                 mark_irn_visited(proj);
2006                         }  /* if */
2007                 }  /* for */
2008                 set_optimize(rem);
2009         }
2010 }  /* lower_Call */
2011
2012 /**
2013  * Translate an Unknown into two.
2014  */
2015 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env) {
2016         int idx = get_irn_idx(node);
2017         ir_graph *irg = current_ir_graph;
2018
2019         env->entries[idx]->low_word  =
2020         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2021 }  /* lower_Unknown */
2022
2023 /**
2024  * Translate a Phi.
2025  *
2026  * First step: just create two templates
2027  */
2028 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
2029         ir_graph *irg = current_ir_graph;
2030         ir_node  *block, *unk;
2031         ir_node  **inl, **inh;
2032         dbg_info *dbg;
2033         int      idx, i, arity = get_Phi_n_preds(phi);
2034         int      enq = 0;
2035
2036         idx = get_irn_idx(phi);
2037         if (env->entries[idx]->low_word) {
2038                 /* Phi nodes already build, check for inputs */
2039                 ir_node *phil = env->entries[idx]->low_word;
2040                 ir_node *phih = env->entries[idx]->high_word;
2041
2042                 for (i = 0; i < arity; ++i) {
2043                         ir_node *pred = get_Phi_pred(phi, i);
2044                         int     idx = get_irn_idx(pred);
2045
2046                         if (env->entries[idx]->low_word) {
2047                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2048                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2049                         } else {
2050                                 /* still not ready */
2051                                 pdeq_putr(env->waitq, phi);
2052                                 return;
2053                         }  /* if */
2054                 }  /* for */
2055         }  /* if */
2056
2057         /* first create a new in array */
2058         NEW_ARR_A(ir_node *, inl, arity);
2059         NEW_ARR_A(ir_node *, inh, arity);
2060         unk = new_r_Unknown(irg, mode);
2061
2062         for (i = 0; i < arity; ++i) {
2063                 ir_node *pred = get_Phi_pred(phi, i);
2064                 int     idx = get_irn_idx(pred);
2065
2066                 if (env->entries[idx]->low_word) {
2067                         inl[i] = env->entries[idx]->low_word;
2068                         inh[i] = env->entries[idx]->high_word;
2069                 } else {
2070                         inl[i] = unk;
2071                         inh[i] = unk;
2072                         enq = 1;
2073                 }  /* if */
2074         }  /* for */
2075
2076         dbg   = get_irn_dbg_info(phi);
2077         block = get_nodes_block(phi);
2078
2079         idx = get_irn_idx(phi);
2080         assert(idx < env->n_entries);
2081         env->entries[idx]->low_word  = new_rd_Phi(dbg, irg, block, arity, inl, mode);
2082         env->entries[idx]->high_word = new_rd_Phi(dbg, irg, block, arity, inh, mode);
2083
2084         if (enq) {
2085                 /* not yet finished */
2086                 pdeq_putr(env->waitq, phi);
2087         }  /* if */
2088 }  /* lower_Phi */
2089
2090 /**
2091  * Translate a Psi.
2092  */
2093 static void lower_Psi(ir_node *psi, ir_mode *mode, lower_env_t *env) {
2094         ir_graph *irg = current_ir_graph;
2095         ir_node  *block, *val;
2096         ir_node  **valsl, **valsh, **conds;
2097         dbg_info *dbg;
2098         int      idx, i, n_conds = get_Psi_n_conds(psi);
2099
2100         /* first create a new in array */
2101         NEW_ARR_A(ir_node *, valsl, n_conds + 1);
2102         NEW_ARR_A(ir_node *, valsh, n_conds + 1);
2103
2104         for (i = 0; i < n_conds; ++i) {
2105                 val = get_Psi_val(psi, i);
2106                 idx = get_irn_idx(val);
2107                 if (env->entries[idx]->low_word) {
2108                         /* Values already build */
2109                         valsl[i] = env->entries[idx]->low_word;
2110                         valsh[i] = env->entries[idx]->high_word;
2111                 } else {
2112                         /* still not ready */
2113                         pdeq_putr(env->waitq, psi);
2114                         return;
2115                 }  /* if */
2116         }  /* for */
2117         val = get_Psi_default(psi);
2118         idx = get_irn_idx(val);
2119         if (env->entries[idx]->low_word) {
2120                 /* Values already build */
2121                 valsl[i] = env->entries[idx]->low_word;
2122                 valsh[i] = env->entries[idx]->high_word;
2123         } else {
2124                 /* still not ready */
2125                 pdeq_putr(env->waitq, psi);
2126                 return;
2127         }  /* if */
2128
2129
2130         NEW_ARR_A(ir_node *, conds, n_conds);
2131         for (i = 0; i < n_conds; ++i) {
2132                 conds[i] = get_Psi_cond(psi, i);
2133         }  /* for */
2134
2135         dbg   = get_irn_dbg_info(psi);
2136         block = get_nodes_block(psi);
2137
2138         idx = get_irn_idx(psi);
2139         assert(idx < env->n_entries);
2140         env->entries[idx]->low_word  = new_rd_Psi(dbg, irg, block, n_conds, conds, valsl, mode);
2141         env->entries[idx]->high_word = new_rd_Psi(dbg, irg, block, n_conds, conds, valsh, mode);
2142 }  /* lower_Psi */
2143
2144 /**
2145  * lower all marked Proj(Cmp)
2146  */
2147 static void lower_Proj(ir_node *node, ir_mode *mode, lower_env_t *env) {
2148         int      idx, lidx, ridx;
2149         ir_node  *cmp, *l, *r, *low, *high, *t, *res;
2150         pn_Cmp   pnc;
2151         ir_node  *blk;
2152         ir_graph *irg = current_ir_graph;
2153         dbg_info *db;
2154
2155         idx = get_irn_idx(node);
2156         if (env->entries[idx] == NULL)
2157                 return;
2158
2159         cmp = get_Proj_pred(node);
2160         l = get_Cmp_left(cmp);
2161         lidx = get_irn_idx(l);
2162         if (! env->entries[lidx]->low_word) {
2163                 /* still not ready */
2164                 pdeq_putr(env->waitq, node);
2165                 return;
2166         }  /* if */
2167
2168         r = get_Cmp_right(cmp);
2169         ridx = get_irn_idx(r);
2170         if (! env->entries[ridx]->low_word) {
2171                 /* still not ready */
2172                 pdeq_putr(env->waitq, node);
2173                 return;
2174         }  /* if */
2175
2176         pnc  = get_Proj_proj(node);
2177         blk  = get_nodes_block(cmp);
2178         db   = get_irn_dbg_info(cmp);
2179         low  = new_rd_Cmp(db, irg, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2180         high = new_rd_Cmp(db, irg, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2181
2182         if (pnc == pn_Cmp_Eq) {
2183                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2184                 res = new_rd_And(db, irg, blk,
2185                         new_r_Proj(irg, blk, low, mode_b, pnc),
2186                         new_r_Proj(irg, blk, high, mode_b, pnc),
2187                         mode_b);
2188         } else if (pnc == pn_Cmp_Lg) {
2189                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2190                 res = new_rd_Or(db, irg, blk,
2191                         new_r_Proj(irg, blk, low, mode_b, pnc),
2192                         new_r_Proj(irg, blk, high, mode_b, pnc),
2193                         mode_b);
2194         } else {
2195                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2196                 t = new_rd_And(db, irg, blk,
2197                         new_r_Proj(irg, blk, low, mode_b, pnc),
2198                         new_r_Proj(irg, blk, high, mode_b, pn_Cmp_Eq),
2199                         mode_b);
2200                 res = new_rd_Or(db, irg, blk,
2201                         new_r_Proj(irg, blk, high, mode_b, pnc & ~pn_Cmp_Eq),
2202                         t,
2203                         mode_b);
2204         }  /* if */
2205         exchange(node, res);
2206 }  /* lower_Proj */
2207
2208 /**
2209  * check for opcodes that must always be lowered.
2210  */
2211 static int always_lower(opcode code) {
2212         switch (code) {
2213         case iro_Proj:
2214         case iro_Start:
2215         case iro_Call:
2216         case iro_Return:
2217         case iro_Cond:
2218     case iro_Conv:
2219                 return 1;
2220         default:
2221                 return 0;
2222         }  /* switch */
2223 }  /* always_lower */
2224
2225 /**
2226  * The type of a lower function.
2227  *
2228  * @param node   the node to be lowered
2229  * @param mode   the low mode for the destination node
2230  * @param env    the lower environment
2231  */
2232 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2233
2234 /**
2235  * Lower a node.
2236  */
2237 static void lower_ops(ir_node *node, void *env)
2238 {
2239         lower_env_t  *lenv = env;
2240         node_entry_t *entry;
2241         int          idx = get_irn_idx(node);
2242
2243         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2244         if (entry || always_lower(get_irn_opcode(node))) {
2245                 ir_op      *op = get_irn_op(node);
2246                 lower_func func = (lower_func)op->ops.generic;
2247
2248                 if (func) {
2249                         ir_mode *mode = get_irn_op_mode(node);
2250
2251                         if (mode == lenv->params->high_signed)
2252                                 mode = lenv->params->low_signed;
2253                         else
2254                                 mode = lenv->params->low_unsigned;
2255
2256                         DB((dbg, LEVEL_1, "  %+F\n", node));
2257                         func(node, mode, lenv);
2258                 }  /* if */
2259         }  /* if */
2260 }  /* lower_ops */
2261
2262 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2263
2264 /**
2265  * Compare two op_mode_entry_t's.
2266  */
2267 static int cmp_op_mode(const void *elt, const void *key, size_t size) {
2268         const op_mode_entry_t *e1 = elt;
2269         const op_mode_entry_t *e2 = key;
2270
2271         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2272 }  /* cmp_op_mode */
2273
2274 /**
2275  * Compare two conv_tp_entry_t's.
2276  */
2277 static int cmp_conv_tp(const void *elt, const void *key, size_t size) {
2278         const conv_tp_entry_t *e1 = elt;
2279         const conv_tp_entry_t *e2 = key;
2280
2281         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2282 }  /* static int cmp_conv_tp */
2283
2284 /*
2285  * Do the lowering.
2286  */
2287 void lower_dw_ops(const lwrdw_param_t *param)
2288 {
2289         lower_env_t lenv;
2290         int i;
2291         ir_graph *rem;
2292
2293         if (! param)
2294                 return;
2295
2296         if (! param->enable)
2297                 return;
2298
2299         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2300
2301         assert(2 * get_mode_size_bits(param->low_signed)   == get_mode_size_bits(param->high_signed));
2302         assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
2303         assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
2304
2305     /* create the necessary maps */
2306         if (! prim_types)
2307                 prim_types = pmap_create();
2308         if (! intrinsic_fkt)
2309                 intrinsic_fkt = new_set(cmp_op_mode, iro_MaxOpcode);
2310         if (! conv_types)
2311                 conv_types = new_set(cmp_conv_tp, 16);
2312         if (! lowered_type)
2313                 lowered_type = pmap_create();
2314
2315     /* create a primitive unsigned and signed type */
2316         if (! tp_u)
2317                 tp_u = get_primitive_type(param->low_unsigned);
2318         if (! tp_s)
2319                 tp_s = get_primitive_type(param->low_signed);
2320
2321     /* create method types for the created binop calls */
2322         if (! binop_tp_u) {
2323                 binop_tp_u = new_type_method(IDENT("binop_u_intrinsic"), 4, 2);
2324                 set_method_param_type(binop_tp_u, 0, tp_u);
2325                 set_method_param_type(binop_tp_u, 1, tp_u);
2326                 set_method_param_type(binop_tp_u, 2, tp_u);
2327                 set_method_param_type(binop_tp_u, 3, tp_u);
2328                 set_method_res_type(binop_tp_u, 0, tp_u);
2329                 set_method_res_type(binop_tp_u, 1, tp_u);
2330         }  /* if */
2331         if (! binop_tp_s) {
2332                 binop_tp_s = new_type_method(IDENT("binop_s_intrinsic"), 4, 2);
2333                 set_method_param_type(binop_tp_s, 0, tp_s);
2334                 set_method_param_type(binop_tp_s, 1, tp_s);
2335                 set_method_param_type(binop_tp_s, 2, tp_s);
2336                 set_method_param_type(binop_tp_s, 3, tp_s);
2337                 set_method_res_type(binop_tp_s, 0, tp_s);
2338                 set_method_res_type(binop_tp_s, 1, tp_s);
2339         }  /* if */
2340         if (! shiftop_tp_u) {
2341                 shiftop_tp_u = new_type_method(IDENT("shiftop_u_intrinsic"), 3, 2);
2342                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2343                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2344                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2345                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2346                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2347         }  /* if */
2348         if (! shiftop_tp_s) {
2349                 shiftop_tp_s = new_type_method(IDENT("shiftop_s_intrinsic"), 3, 2);
2350                 set_method_param_type(shiftop_tp_s, 0, tp_s);
2351                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2352                 /* beware: shift count is always mode_Iu */
2353                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2354                 set_method_res_type(shiftop_tp_s, 0, tp_s);
2355                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2356         }  /* if */
2357         if (! unop_tp_u) {
2358                 unop_tp_u = new_type_method(IDENT("unop_u_intrinsic"), 2, 2);
2359                 set_method_param_type(unop_tp_u, 0, tp_u);
2360                 set_method_param_type(unop_tp_u, 1, tp_u);
2361                 set_method_res_type(unop_tp_u, 0, tp_u);
2362                 set_method_res_type(unop_tp_u, 1, tp_u);
2363         }  /* if */
2364         if (! unop_tp_s) {
2365                 unop_tp_s = new_type_method(IDENT("unop_s_intrinsic"), 2, 2);
2366                 set_method_param_type(unop_tp_s, 0, tp_s);
2367                 set_method_param_type(unop_tp_s, 1, tp_s);
2368                 set_method_res_type(unop_tp_s, 0, tp_s);
2369                 set_method_res_type(unop_tp_s, 1, tp_s);
2370         }  /* if */
2371
2372         lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), mode_Iu);
2373         lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), mode_Iu);
2374         lenv.waitq         = new_pdeq();
2375         lenv.params        = param;
2376
2377         /* first clear the generic function pointer for all ops */
2378         clear_irp_opcodes_generic_func();
2379
2380 #define LOWER2(op, fkt)   op_##op->ops.generic = (op_func)fkt
2381 #define LOWER(op)         LOWER2(op, lower_##op)
2382 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2383 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2384
2385         /* the table of all operations that must be lowered follows */
2386         LOWER(Load);
2387         LOWER(Store);
2388         LOWER(Const);
2389         LOWER(And);
2390         LOWER(Or);
2391         LOWER(Eor);
2392         LOWER(Not);
2393         LOWER(Cond);
2394         LOWER(Return);
2395         LOWER(Call);
2396         LOWER(Unknown);
2397         LOWER(Phi);
2398         LOWER(Psi);
2399         LOWER(Start);
2400
2401         LOWER_BIN(Add);
2402         LOWER_BIN(Sub);
2403         LOWER_BIN(Mul);
2404         LOWER(Shl);
2405         LOWER(Shr);
2406         LOWER(Shrs);
2407         LOWER(Rot);
2408         LOWER2(Minus, lower_Minus);
2409         LOWER(DivMod);
2410         LOWER(Div);
2411         LOWER(Mod);
2412         LOWER_UN(Abs);
2413         LOWER2(Proj, lower_Proj);
2414
2415         LOWER(Conv);
2416
2417 #undef LOWER_UN
2418 #undef LOWER_BIN
2419 #undef LOWER
2420 #undef LOWER2
2421
2422         /* transform all graphs */
2423         rem = current_ir_graph;
2424         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2425                 ir_graph *irg = get_irp_irg(i);
2426                 int n_idx;
2427
2428                 obstack_init(&lenv.obst);
2429
2430                 n_idx = get_irg_last_idx(irg);
2431                 lenv.n_entries = n_idx;
2432                 lenv.entries   = xmalloc(n_idx * sizeof(lenv.entries[0]));
2433                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2434
2435                 /* first step: link all nodes and allocate data */
2436                 lenv.flags = 0;
2437                 lenv.proj_2_block = pmap_create();
2438                 irg_walk_graph(irg, firm_clear_link, prepare_links, &lenv);
2439
2440                 if (lenv.flags & MUST_BE_LOWERED) {
2441                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2442
2443                         /* must do some work */
2444                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2445
2446                         /* last step: all waiting nodes */
2447                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2448                         current_ir_graph = irg;
2449                         while (! pdeq_empty(lenv.waitq)) {
2450                                 ir_node *node = pdeq_getl(lenv.waitq);
2451
2452                                 lower_ops(node, &lenv);
2453                         }  /* while */
2454
2455                         /* outs are invalid, we changed the graph */
2456                         set_irg_outs_inconsistent(irg);
2457
2458                         if (lenv.flags & CF_CHANGED) {
2459                                 /* control flow changed, dominance info is invalid */
2460                                 set_irg_doms_inconsistent(irg);
2461                                 set_irg_extblk_inconsistent(irg);
2462                                 set_irg_loopinfo_inconsistent(irg);
2463                         }  /* if */
2464
2465                         dump_ir_block_graph(irg, "-dw");
2466                 }  /* if */
2467                 pmap_destroy(lenv.proj_2_block);
2468                 free(lenv.entries);
2469                 obstack_free(&lenv.obst, NULL);
2470         }  /* for */
2471         del_pdeq(lenv.waitq);
2472         current_ir_graph = rem;
2473 }  /* lower_dw_ops */
2474
2475 /* Default implementation. */
2476 entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2477                                  const ir_mode *imode, const ir_mode *omode,
2478                                  void *context)
2479 {
2480         char buf[64];
2481         ident *id;
2482         entity *ent;
2483
2484         if (imode == omode) {
2485                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2486         } else {
2487                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2488                         get_mode_name(imode), get_mode_name(omode));
2489         }  /* if */
2490         id = new_id_from_str(buf);
2491
2492         ent = new_entity(get_glob_type(), id, method);
2493         set_entity_ld_ident(ent, get_entity_ident(ent));
2494         set_entity_visibility(ent, visibility_external_allocated);
2495         return ent;
2496 }  /* def_create_intrinsic_fkt */