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

   1 /*
   2  * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
   3  *
   4  * This file is part of libFirm.
   5  *
   6  * This file may be distributed and/or modified under the terms of the
   7  * GNU General Public License version 2 as published by the Free Software
   8  * Foundation and appearing in the file LICENSE.GPL included in the
   9  * packaging of this file.
  10  *
  11  * Licensees holding valid libFirm Professional Edition licenses may use
  12  * this file in accordance with the libFirm Commercial License.
  13  * Agreement provided with the Software.
  14  *
  15  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  16  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE.
  18  */
  19
  20 /**
  21  * @file
  22  * @brief   Lower Double word operations, ie 64bit -> 32bit, 32bit -> 16bit etc.
  23  * @date    8.10.2004
  24  * @author  Michael Beck
  25  * @version $Id$
  26  */
  27 #include "config.h"
  28
  29 #ifdef HAVE_STRING_H
  30 # include <string.h>
  31 #endif
  32 #ifdef HAVE_STDLIB_H
  33 # include <stdlib.h>
  34 #endif
  35
  36 #include <assert.h>
  37
  38 #include "error.h"
  39 #include "lowering.h"
  40 #include "irnode_t.h"
  41 #include "irgraph_t.h"
  42 #include "irmode_t.h"
  43 #include "iropt_t.h"
  44 #include "irgmod.h"
  45 #include "tv_t.h"
  46 #include "dbginfo_t.h"
  47 #include "iropt_dbg.h"
  48 #include "irflag_t.h"
  49 #include "firmstat.h"
  50 #include "irgwalk.h"
  51 #include "ircons.h"
  52 #include "irflag.h"
  53 #include "irtools.h"
  54 #include "debug.h"
  55 #include "set.h"
  56 #include "pmap.h"
  57 #include "pdeq.h"
  58 #include "irdump.h"
  59 #include "array_t.h"
  60
  61 /** A map from mode to a primitive type. */
  62 static pmap *prim_types;
  63
  64 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  65 static set *intrinsic_fkt;
  66
  67 /** A map from (imode, omode) to conv function types. */
  68 static set *conv_types;
  69
  70 /** A map from a method type to its lowered type. */
  71 static pmap *lowered_type;
  72
  73 /** The types for the binop and unop intrinsics. */
  74 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;
  75
  76 /** the debug handle */
  77 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  78
  79 /**
  80  * An entry in the (op, imode, omode) -> entity map.
  81  */
  82 typedef struct _op_mode_entry {
  83         const ir_op   *op;    /**< the op */
  84         const ir_mode *imode; /**< the input mode */
  85         const ir_mode *omode; /**< the output mode */
  86         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  87 } op_mode_entry_t;
  88
  89 /**
  90  * An entry in the (imode, omode) -> tp map.
  91  */
  92 typedef struct _conv_tp_entry {
  93         const ir_mode *imode; /**< the input mode */
  94         const ir_mode *omode; /**< the output mode */
  95         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
  96 } conv_tp_entry_t;
  97
  98 /**
  99  * Every double word node will be replaced,
 100  * we need some store to hold the replacement:
 101  */
 102 typedef struct _node_entry_t {
 103         ir_node *low_word;    /**< the low word */
 104         ir_node *high_word;   /**< the high word */
 105 } node_entry_t;
 106
 107 enum lower_flags {
 108         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 109         CF_CHANGED      = 2,  /**< control flow was changed */
 110 };
 111
 112 /**
 113  * The lower environment.
 114  */
 115 typedef struct _lower_env_t {
 116         node_entry_t **entries;       /**< entries per node */
 117         struct obstack obst;          /**< an obstack holding the temporary data */
 118         tarval   *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 119         tarval   *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 120         pdeq     *waitq;              /**< a wait queue of all nodes that must be handled later */
 121         pmap     *proj_2_block;       /**< a map from ProjX to its destination blocks */
 122         const lwrdw_param_t *params;  /**< transformation parameter */
 123         unsigned flags;               /**< some flags */
 124         int      n_entries;           /**< number of entries */
 125 } lower_env_t;
 126
 127 /**
 128  * Get a primitive mode for a mode.
 129  */
 130 static ir_type *get_primitive_type(ir_mode *mode) {
 131         pmap_entry *entry = pmap_find(prim_types, mode);
 132         ir_type *tp;
 133         char buf[64];
 134
 135         if (entry)
 136                 return entry->value;
 137
 138         snprintf(buf, sizeof(buf), "_prim_%s", get_mode_name(mode));
 139         tp = new_type_primitive(new_id_from_str(buf), mode);
 140
 141         pmap_insert(prim_types, mode, tp);
 142         return tp;
 143 }  /* get_primitive_type */
 144
 145 /**
 146  * Create a method type for a Conv emulation from imode to omode.
 147  */
 148 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env) {
 149         conv_tp_entry_t key, *entry;
 150         ir_type *mtd;
 151
 152         key.imode = imode;
 153         key.omode = omode;
 154         key.mtd   = NULL;
 155
 156         entry = set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 157         if (! entry->mtd) {
 158                 int n_param = 1, n_res = 1;
 159                 char buf[64];
 160
 161                 if (imode == env->params->high_signed || imode == env->params->high_unsigned)
 162                         n_param = 2;
 163                 if (omode == env->params->high_signed || omode == env->params->high_unsigned)
 164                         n_res = 2;
 165
 166                 /* create a new one */
 167                 snprintf(buf, sizeof(buf), "LConv%s%s", get_mode_name(imode), get_mode_name(omode));
 168                 mtd = new_type_method(new_id_from_str(buf), n_param, n_res);
 169
 170                 /* set param types and result types */
 171                 n_param = 0;
 172                 if (imode == env->params->high_signed) {
 173                         set_method_param_type(mtd, n_param++, tp_u);
 174                         set_method_param_type(mtd, n_param++, tp_s);
 175                 } else if (imode == env->params->high_unsigned) {
 176                         set_method_param_type(mtd, n_param++, tp_u);
 177                         set_method_param_type(mtd, n_param++, tp_u);
 178                 } else {
 179                         ir_type *tp = get_primitive_type(imode);
 180                         set_method_param_type(mtd, n_param++, tp);
 181                 }  /* if */
 182
 183                 n_res = 0;
 184                 if (omode == env->params->high_signed) {
 185                         set_method_res_type(mtd, n_res++, tp_u);
 186                         set_method_res_type(mtd, n_res++, tp_s);
 187                 } else if (omode == env->params->high_unsigned) {
 188                         set_method_res_type(mtd, n_res++, tp_u);
 189                         set_method_res_type(mtd, n_res++, tp_u);
 190                 } else {
 191                         ir_type *tp = get_primitive_type(omode);
 192                         set_method_res_type(mtd, n_res++, tp);
 193                 }  /* if */
 194                 entry->mtd = mtd;
 195         } else {
 196                 mtd = entry->mtd;
 197         }  /* if */
 198         return mtd;
 199 }  /* get_conv_type */
 200
 201 /**
 202  * Add an additional control flow input to a block.
 203  * Patch all Phi nodes. The new Phi inputs are copied from
 204  * old input number nr.
 205  */
 206 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 207 {
 208         int i, arity = get_irn_arity(block);
 209         ir_node **in, *phi;
 210
 211         assert(nr < arity);
 212
 213         NEW_ARR_A(ir_node *, in, arity + 1);
 214         for (i = 0; i < arity; ++i)
 215                 in[i] = get_irn_n(block, i);
 216         in[i] = cf;
 217
 218         set_irn_in(block, i + 1, in);
 219
 220         for (phi = get_irn_link(block); phi; phi = get_irn_link(phi)) {
 221                 for (i = 0; i < arity; ++i)
 222                         in[i] = get_irn_n(phi, i);
 223                 in[i] = in[nr];
 224                 set_irn_in(phi, i + 1, in);
 225         }  /* for */
 226 }  /* add_block_cf_input_nr */
 227
 228 /**
 229  * Add an additional control flow input to a block.
 230  * Patch all Phi nodes. The new Phi inputs are copied from
 231  * old input from cf tmpl.
 232  */
 233 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 234 {
 235         int i, arity = get_irn_arity(block);
 236         int nr = 0;
 237
 238         for (i = 0; i < arity; ++i) {
 239                 if (get_irn_n(block, i) == tmpl) {
 240                         nr = i;
 241                         break;
 242                 }  /* if */
 243         }  /* for */
 244         assert(i < arity);
 245         add_block_cf_input_nr(block, nr, cf);
 246 }  /* add_block_cf_input */
 247
 248 /**
 249  * Return the "operational" mode of a Firm node.
 250  */
 251 static ir_mode *get_irn_op_mode(ir_node *node)
 252 {
 253         switch (get_irn_opcode(node)) {
 254         case iro_Load:
 255                 return get_Load_mode(node);
 256         case iro_Store:
 257                 return get_irn_mode(get_Store_value(node));
 258         case iro_DivMod:
 259                 return get_irn_mode(get_DivMod_left(node));
 260         case iro_Div:
 261                 return get_irn_mode(get_Div_left(node));
 262         case iro_Mod:
 263                 return get_irn_mode(get_Mod_left(node));
 264         case iro_Cmp:
 265                 return get_irn_mode(get_Cmp_left(node));
 266         default:
 267                 return get_irn_mode(node);
 268         }  /* switch */
 269 }  /* get_irn_op_mode */
 270
 271 /**
 272  * Walker, prepare the node links.
 273  */
 274 static void prepare_links(ir_node *node, void *env)
 275 {
 276         lower_env_t  *lenv = env;
 277         ir_mode      *mode = get_irn_op_mode(node);
 278         node_entry_t *link;
 279         int          i, idx;
 280
 281         if (mode == lenv->params->high_signed ||
 282                 mode == lenv->params->high_unsigned) {
 283                 /* ok, found a node that will be lowered */
 284                 link = obstack_alloc(&lenv->obst, sizeof(*link));
 285
 286                 memset(link, 0, sizeof(*link));
 287
 288                 idx = get_irn_idx(node);
 289                 if (idx >= lenv->n_entries) {
 290                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 291                         int old = lenv->n_entries;
 292                         int n_idx = idx + (idx >> 3);
 293
 294                         ARR_RESIZE(node_entry_t *, lenv->entries, n_idx);
 295                         memset(&lenv->entries[old], 0, (n_idx - old) * sizeof(lenv->entries[0]));
 296                         lenv->n_entries = n_idx;
 297                 }
 298                 lenv->entries[idx] = link;
 299                 lenv->flags |= MUST_BE_LOWERED;
 300         } else if (is_Conv(node)) {
 301                 /* Conv nodes have two modes */
 302                 ir_node *pred = get_Conv_op(node);
 303                 mode = get_irn_mode(pred);
 304
 305                 if (mode == lenv->params->high_signed ||
 306                         mode == lenv->params->high_unsigned) {
 307                         /* must lower this node either but don't need a link */
 308                         lenv->flags |= MUST_BE_LOWERED;
 309                 }  /* if */
 310                 return;
 311         }  /* if */
 312
 313         if (is_Proj(node)) {
 314                 /* link all Proj nodes to its predecessor:
 315                    Note that Tuple Proj's and its Projs are linked either. */
 316                 ir_node *pred = get_Proj_pred(node);
 317
 318                 set_irn_link(node, get_irn_link(pred));
 319                 set_irn_link(pred, node);
 320         } else if (is_Phi(node)) {
 321                 /* link all Phi nodes to its block */
 322                 ir_node *block = get_nodes_block(node);
 323
 324                 set_irn_link(node, get_irn_link(block));
 325                 set_irn_link(block, node);
 326         } else if (is_Block(node)) {
 327                 /* fill the Proj -> Block map */
 328                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 329                         ir_node *pred = get_Block_cfgpred(node, i);
 330
 331                         if (is_Proj(pred))
 332                                 pmap_insert(lenv->proj_2_block, pred, node);
 333                 }  /* for */
 334         }  /* if */
 335 }  /* prepare_links */
 336
 337 /**
 338  * Translate a Constant: create two.
 339  */
 340 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env) {
 341         tarval   *tv, *tv_l, *tv_h;
 342         ir_node  *low, *high;
 343         dbg_info *dbg = get_irn_dbg_info(node);
 344         ir_node  *block = get_nodes_block(node);
 345         int      idx;
 346         ir_graph *irg = current_ir_graph;
 347         ir_mode  *low_mode = env->params->low_unsigned;
 348
 349         tv   = get_Const_tarval(node);
 350
 351         tv_l = tarval_convert_to(tv, low_mode);
 352         low  = new_rd_Const(dbg, irg, block, low_mode, tv_l);
 353
 354         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 355         high = new_rd_Const(dbg, irg, block, mode, tv_h);
 356
 357         idx = get_irn_idx(node);
 358         assert(idx < env->n_entries);
 359         env->entries[idx]->low_word  = low;
 360         env->entries[idx]->high_word = high;
 361 }  /* lower_Const */
 362
 363 /**
 364  * Translate a Load: create two.
 365  */
 366 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env) {
 367         ir_mode  *low_mode = env->params->low_unsigned;
 368         ir_graph *irg = current_ir_graph;
 369         ir_node  *adr = get_Load_ptr(node);
 370         ir_node  *mem = get_Load_mem(node);
 371         ir_node  *low, *high, *proj;
 372         dbg_info *dbg;
 373         ir_node  *block = get_nodes_block(node);
 374         int      idx;
 375
 376         if (env->params->little_endian) {
 377                 low  = adr;
 378                 high = new_r_Add(irg, block, adr,
 379                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 380                         get_irn_mode(adr));
 381         } else {
 382                 low  = new_r_Add(irg, block, adr,
 383                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 384                         get_irn_mode(adr));
 385                 high = adr;
 386         }  /* if */
 387
 388         /* create two loads */
 389         dbg  = get_irn_dbg_info(node);
 390         low  = new_rd_Load(dbg, irg, block, mem,  low,  low_mode);
 391         proj = new_r_Proj(irg, block, low, mode_M, pn_Load_M);
 392         high = new_rd_Load(dbg, irg, block, proj, high, mode);
 393
 394         set_Load_volatility(low,  get_Load_volatility(node));
 395         set_Load_volatility(high, get_Load_volatility(node));
 396
 397         idx = get_irn_idx(node);
 398         assert(idx < env->n_entries);
 399         env->entries[idx]->low_word  = low;
 400         env->entries[idx]->high_word = high;
 401
 402         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 403                 idx = get_irn_idx(proj);
 404
 405                 switch (get_Proj_proj(proj)) {
 406                 case pn_Load_M:         /* Memory result. */
 407                         /* put it to the second one */
 408                         set_Proj_pred(proj, high);
 409                         break;
 410                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 411                         /* put it to the first one */
 412                         set_Proj_pred(proj, low);
 413                         break;
 414                 case pn_Load_res:       /* Result of load operation. */
 415                         assert(idx < env->n_entries);
 416                         env->entries[idx]->low_word  = new_r_Proj(irg, block, low,  low_mode, pn_Load_res);
 417                         env->entries[idx]->high_word = new_r_Proj(irg, block, high, mode,     pn_Load_res);
 418                         break;
 419                 default:
 420                         assert(0 && "unexpected Proj number");
 421                 }  /* switch */
 422                 /* mark this proj: we have handled it already, otherwise we might fall into
 423                  * out new nodes. */
 424                 mark_irn_visited(proj);
 425         }  /* for */
 426 }  /* lower_Load */
 427
 428 /**
 429  * Translate a Store: create two.
 430  */
 431 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env) {
 432         ir_graph *irg;
 433         ir_node  *block, *adr, *mem;
 434         ir_node  *low, *high, *irn, *proj;
 435         dbg_info *dbg;
 436         int      idx;
 437         node_entry_t *entry;
 438         (void) node;
 439         (void) mode;
 440
 441         irn = get_Store_value(node);
 442         entry = env->entries[get_irn_idx(irn)];
 443         assert(entry);
 444
 445         if (! entry->low_word) {
 446                 /* not ready yet, wait */
 447                 pdeq_putr(env->waitq, node);
 448                 return;
 449         }  /* if */
 450
 451         irg = current_ir_graph;
 452         adr = get_Store_ptr(node);
 453         mem = get_Store_mem(node);
 454         block = get_nodes_block(node);
 455
 456         if (env->params->little_endian) {
 457                 low  = adr;
 458                 high = new_r_Add(irg, block, adr,
 459                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 460                         get_irn_mode(adr));
 461         } else {
 462                 low  = new_r_Add(irg, block, adr,
 463                         new_r_Const(irg, block, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 464                         get_irn_mode(adr));
 465                 high = adr;
 466         }  /* if */
 467
 468         /* create two Stores */
 469         dbg = get_irn_dbg_info(node);
 470         low  = new_rd_Store(dbg, irg, block, mem, low,  entry->low_word);
 471         proj = new_r_Proj(irg, block, low, mode_M, pn_Store_M);
 472         high = new_rd_Store(dbg, irg, block, proj, high, entry->high_word);
 473
 474         set_Store_volatility(low,  get_Store_volatility(node));
 475         set_Store_volatility(high, get_Store_volatility(node));
 476
 477         idx = get_irn_idx(node);
 478         assert(idx < env->n_entries);
 479         env->entries[idx]->low_word  = low;
 480         env->entries[idx]->high_word = high;
 481
 482         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 483                 idx = get_irn_idx(proj);
 484
 485                 switch (get_Proj_proj(proj)) {
 486                 case pn_Store_M:         /* Memory result. */
 487                         /* put it to the second one */
 488                         set_Proj_pred(proj, high);
 489                         break;
 490                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 491                         /* put it to the first one */
 492                         set_Proj_pred(proj, low);
 493                         break;
 494                 default:
 495                         assert(0 && "unexpected Proj number");
 496                 }  /* switch */
 497                 /* mark this proj: we have handled it already, otherwise we might fall into
 498                  * out new nodes. */
 499                 mark_irn_visited(proj);
 500         }  /* for */
 501 }  /* lower_Store */
 502
 503 /**
 504  * Return a node containing the address of the intrinsic emulation function.
 505  *
 506  * @param method  the method type of the emulation function
 507  * @param op      the emulated ir_op
 508  * @param imode   the input mode of the emulated opcode
 509  * @param omode   the output mode of the emulated opcode
 510  * @param block   where the new mode is created
 511  * @param env     the lower environment
 512  */
 513 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 514                                       ir_mode *imode, ir_mode *omode,
 515                                       ir_node *block, lower_env_t *env) {
 516         symconst_symbol sym;
 517         ir_entity *ent;
 518         op_mode_entry_t key, *entry;
 519
 520         key.op    = op;
 521         key.imode = imode;
 522         key.omode = omode;
 523         key.ent   = NULL;
 524
 525         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 526                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 527         if (! entry->ent) {
 528                 /* create a new one */
 529                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 530
 531                 assert(ent && "Intrinsic creator must return an entity");
 532                 entry->ent = ent;
 533         } else {
 534                 ent = entry->ent;
 535         }  /* if */
 536         sym.entity_p = ent;
 537         return new_r_SymConst(current_ir_graph, block, mode_P_code, sym, symconst_addr_ent);
 538 }  /* get_intrinsic_address */
 539
 540 /**
 541  * Translate a Div.
 542  *
 543  * Create an intrinsic Call.
 544  */
 545 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env) {
 546         ir_node  *block, *irn, *call, *proj;
 547         ir_node  *in[4];
 548         ir_mode  *opmode;
 549         dbg_info *dbg;
 550         ir_type  *mtp;
 551         int      idx;
 552         ir_graph *irg;
 553         node_entry_t *entry;
 554
 555         irn   = get_Div_left(node);
 556         entry = env->entries[get_irn_idx(irn)];
 557         assert(entry);
 558
 559         if (! entry->low_word) {
 560                 /* not ready yet, wait */
 561                 pdeq_putr(env->waitq, node);
 562                 return;
 563         }  /* if */
 564
 565         in[0] = entry->low_word;
 566         in[1] = entry->high_word;
 567
 568         irn   = get_Div_right(node);
 569         entry = env->entries[get_irn_idx(irn)];
 570         assert(entry);
 571
 572         if (! entry->low_word) {
 573                 /* not ready yet, wait */
 574                 pdeq_putr(env->waitq, node);
 575                 return;
 576         }  /* if */
 577
 578         in[2] = entry->low_word;
 579         in[3] = entry->high_word;
 580
 581         dbg   = get_irn_dbg_info(node);
 582         block = get_nodes_block(node);
 583         irg   = current_ir_graph;
 584
 585         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 586         opmode = get_irn_op_mode(node);
 587         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, block, env);
 588         call = new_rd_Call(dbg, irg, block, get_Div_mem(node),
 589                 irn, 4, in, mtp);
 590         set_irn_pinned(call, get_irn_pinned(node));
 591         irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 592
 593         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 594                 switch (get_Proj_proj(proj)) {
 595                 case pn_Div_M:         /* Memory result. */
 596                         /* reroute to the call */
 597                         set_Proj_pred(proj, call);
 598                         set_Proj_proj(proj, pn_Call_M_except);
 599                         break;
 600                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 601                         /* reroute to the call */
 602                         set_Proj_pred(proj, call);
 603                         set_Proj_proj(proj, pn_Call_X_except);
 604                         break;
 605                 case pn_Div_res:       /* Result of computation. */
 606                         idx = get_irn_idx(proj);
 607                         assert(idx < env->n_entries);
 608                         env->entries[idx]->low_word  = new_r_Proj(current_ir_graph, block, irn, env->params->low_unsigned, 0);
 609                         env->entries[idx]->high_word = new_r_Proj(current_ir_graph, block, irn, mode,                      1);
 610                         break;
 611                 default:
 612                         assert(0 && "unexpected Proj number");
 613                 }  /* switch */
 614                 /* mark this proj: we have handled it already, otherwise we might fall into
 615                  * out new nodes. */
 616                 mark_irn_visited(proj);
 617         }  /* for */
 618 }  /* lower_Div */
 619
 620 /**
 621  * Translate a Mod.
 622  *
 623  * Create an intrinsic Call.
 624  */
 625 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 626         ir_node  *block, *proj, *irn, *call;
 627         ir_node  *in[4];
 628         ir_mode  *opmode;
 629         dbg_info *dbg;
 630         ir_type  *mtp;
 631         int      idx;
 632         ir_graph *irg;
 633         node_entry_t *entry;
 634
 635         irn   = get_Mod_left(node);
 636         entry = env->entries[get_irn_idx(irn)];
 637         assert(entry);
 638
 639         if (! entry->low_word) {
 640                 /* not ready yet, wait */
 641                 pdeq_putr(env->waitq, node);
 642                 return;
 643         }  /* if */
 644
 645         in[0] = entry->low_word;
 646         in[1] = entry->high_word;
 647
 648         irn   = get_Mod_right(node);
 649         entry = env->entries[get_irn_idx(irn)];
 650         assert(entry);
 651
 652         if (! entry->low_word) {
 653                 /* not ready yet, wait */
 654                 pdeq_putr(env->waitq, node);
 655                 return;
 656         }  /* if */
 657
 658         in[2] = entry->low_word;
 659         in[3] = entry->high_word;
 660
 661         dbg   = get_irn_dbg_info(node);
 662         block = get_nodes_block(node);
 663         irg   = current_ir_graph;
 664
 665         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 666         opmode = get_irn_op_mode(node);
 667         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, block, env);
 668         call = new_rd_Call(dbg, irg, block, get_Mod_mem(node),
 669                 irn, 4, in, mtp);
 670         set_irn_pinned(call, get_irn_pinned(node));
 671         irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 672
 673         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 674                 switch (get_Proj_proj(proj)) {
 675                 case pn_Mod_M:         /* Memory result. */
 676                         /* reroute to the call */
 677                         set_Proj_pred(proj, call);
 678                         set_Proj_proj(proj, pn_Call_M_except);
 679                         break;
 680                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 681                         /* reroute to the call */
 682                         set_Proj_pred(proj, call);
 683                         set_Proj_proj(proj, pn_Call_X_except);
 684                         break;
 685                 case pn_Mod_res:       /* Result of computation. */
 686                         idx = get_irn_idx(proj);
 687                         assert(idx < env->n_entries);
 688                         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
 689                         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
 690                         break;
 691                 default:
 692                         assert(0 && "unexpected Proj number");
 693                 }  /* switch */
 694                 /* mark this proj: we have handled it already, otherwise we might fall into
 695                  * out new nodes. */
 696                 mark_irn_visited(proj);
 697         }  /* for */
 698 }  /* lower_Mod */
 699
 700 /**
 701  * Translate a DivMod.
 702  *
 703  * Create two intrinsic Calls.
 704  */
 705 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 706         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod;
 707         ir_node  *resDiv = NULL;
 708         ir_node  *resMod = NULL;
 709         ir_node  *in[4];
 710         ir_mode  *opmode;
 711         dbg_info *dbg;
 712         ir_type  *mtp;
 713         int      idx;
 714         node_entry_t *entry;
 715         unsigned flags = 0;
 716         ir_graph *irg;
 717
 718         /* check if both results are needed */
 719         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 720                 switch (get_Proj_proj(proj)) {
 721                 case pn_DivMod_res_div: flags |= 1; break;
 722                 case pn_DivMod_res_mod: flags |= 2; break;
 723                 default: break;
 724                 }  /* switch */
 725         }  /* for */
 726
 727         irn   = get_DivMod_left(node);
 728         entry = env->entries[get_irn_idx(irn)];
 729         assert(entry);
 730
 731         if (! entry->low_word) {
 732                 /* not ready yet, wait */
 733                 pdeq_putr(env->waitq, node);
 734                 return;
 735         }  /* if */
 736
 737         in[0] = entry->low_word;
 738         in[1] = entry->high_word;
 739
 740         irn   = get_DivMod_right(node);
 741         entry = env->entries[get_irn_idx(irn)];
 742         assert(entry);
 743
 744         if (! entry->low_word) {
 745                 /* not ready yet, wait */
 746                 pdeq_putr(env->waitq, node);
 747                 return;
 748         }  /* if */
 749
 750         in[2] = entry->low_word;
 751         in[3] = entry->high_word;
 752
 753         dbg   = get_irn_dbg_info(node);
 754         block = get_nodes_block(node);
 755         irg   = current_ir_graph;
 756
 757         mem = get_DivMod_mem(node);
 758
 759         callDiv = callMod = NULL;
 760         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 761         if (flags & 1) {
 762                 opmode = get_irn_op_mode(node);
 763                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, block, env);
 764                 callDiv = new_rd_Call(dbg, irg, block, mem,
 765                         irn, 4, in, mtp);
 766                 set_irn_pinned(callDiv, get_irn_pinned(node));
 767                 resDiv = new_r_Proj(irg, block, callDiv, mode_T, pn_Call_T_result);
 768         }  /* if */
 769         if (flags & 2) {
 770                 if (flags & 1)
 771                         mem = new_r_Proj(irg, block, callDiv, mode_M, pn_Call_M);
 772                 opmode = get_irn_op_mode(node);
 773                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, block, env);
 774                 callMod = new_rd_Call(dbg, irg, block, mem,
 775                         irn, 4, in, mtp);
 776                 set_irn_pinned(callMod, get_irn_pinned(node));
 777                 resMod = new_r_Proj(irg, block, callMod, mode_T, pn_Call_T_result);
 778         }  /* if */
 779
 780         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 781                 switch (get_Proj_proj(proj)) {
 782                 case pn_DivMod_M:         /* Memory result. */
 783                         /* reroute to the first call */
 784                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 785                         set_Proj_proj(proj, pn_Call_M_except);
 786                         break;
 787                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 788                         /* reroute to the first call */
 789                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 790                         set_Proj_proj(proj, pn_Call_X_except);
 791                         break;
 792                 case pn_DivMod_res_div:   /* Result of Div. */
 793                         idx = get_irn_idx(proj);
 794                         assert(idx < env->n_entries);
 795                         env->entries[idx]->low_word  = new_r_Proj(irg, block, resDiv, env->params->low_unsigned, 0);
 796                         env->entries[idx]->high_word = new_r_Proj(irg, block, resDiv, mode,                      1);
 797                         break;
 798                 case pn_DivMod_res_mod:   /* Result of Mod. */
 799                         idx = get_irn_idx(proj);
 800                         env->entries[idx]->low_word  = new_r_Proj(irg, block, resMod, env->params->low_unsigned, 0);
 801                         env->entries[idx]->high_word = new_r_Proj(irg, block, resMod, mode,                      1);
 802                         break;
 803                 default:
 804                         assert(0 && "unexpected Proj number");
 805                 }  /* switch */
 806                 /* mark this proj: we have handled it already, otherwise we might fall into
 807                  * out new nodes. */
 808                 mark_irn_visited(proj);
 809         }  /* for */
 810 }  /* lower_DivMod */
 811
 812 /**
 813  * Translate a Binop.
 814  *
 815  * Create an intrinsic Call.
 816  */
 817 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 818         ir_node  *block, *irn;
 819         ir_node  *in[4];
 820         dbg_info *dbg;
 821         ir_type  *mtp;
 822         int      idx;
 823         ir_graph *irg;
 824         node_entry_t *entry;
 825
 826         irn   = get_binop_left(node);
 827         entry = env->entries[get_irn_idx(irn)];
 828         assert(entry);
 829
 830         if (! entry->low_word) {
 831                 /* not ready yet, wait */
 832                 pdeq_putr(env->waitq, node);
 833                 return;
 834         }  /* if */
 835
 836         in[0] = entry->low_word;
 837         in[1] = entry->high_word;
 838
 839         irn   = get_binop_right(node);
 840         entry = env->entries[get_irn_idx(irn)];
 841         assert(entry);
 842
 843         if (! entry->low_word) {
 844                 /* not ready yet, wait */
 845                 pdeq_putr(env->waitq, node);
 846                 return;
 847         }  /* if */
 848
 849         in[2] = entry->low_word;
 850         in[3] = entry->high_word;
 851
 852         dbg   = get_irn_dbg_info(node);
 853         block = get_nodes_block(node);
 854         irg   = current_ir_graph;
 855
 856         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 857         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
 858         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
 859                 irn, 4, in, mtp);
 860         set_irn_pinned(irn, get_irn_pinned(node));
 861         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
 862
 863         idx = get_irn_idx(node);
 864         assert(idx < env->n_entries);
 865         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
 866         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
 867 }  /* lower_Binop */
 868
 869 /**
 870  * Translate a Shiftop.
 871  *
 872  * Create an intrinsic Call.
 873  */
 874 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 875         ir_node  *block, *irn;
 876         ir_node  *in[3];
 877         dbg_info *dbg;
 878         ir_type  *mtp;
 879         int      idx;
 880         ir_graph *irg;
 881         node_entry_t *entry;
 882
 883         irn   = get_binop_left(node);
 884         entry = env->entries[get_irn_idx(irn)];
 885         assert(entry);
 886
 887         if (! entry->low_word) {
 888                 /* not ready yet, wait */
 889                 pdeq_putr(env->waitq, node);
 890                 return;
 891         }  /* if */
 892
 893         in[0] = entry->low_word;
 894         in[1] = entry->high_word;
 895
 896         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 897         in[2] = get_binop_right(node);
 898
 899         dbg   = get_irn_dbg_info(node);
 900         block = get_nodes_block(node);
 901         irg  = current_ir_graph;
 902
 903         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 904         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
 905         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
 906                 irn, 3, in, mtp);
 907         set_irn_pinned(irn, get_irn_pinned(node));
 908         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
 909
 910         idx = get_irn_idx(node);
 911         assert(idx < env->n_entries);
 912         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
 913         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
 914 }  /* lower_Shiftop */
 915
 916 /**
 917  * Translate a Shr and handle special cases.
 918  */
 919 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env) {
 920         ir_node  *right = get_Shr_right(node);
 921         ir_graph *irg = current_ir_graph;
 922
 923         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 924                 tarval *tv = get_Const_tarval(right);
 925
 926                 if (tarval_is_long(tv) &&
 927                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 928                         ir_node *block = get_nodes_block(node);
 929                         ir_node *left = get_Shr_left(node);
 930                         ir_node *c;
 931                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 932                         int idx = get_irn_idx(left);
 933
 934                         left = env->entries[idx]->high_word;
 935                         idx = get_irn_idx(node);
 936
 937                         if (shf_cnt > 0) {
 938                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
 939                                 env->entries[idx]->low_word = new_r_Shr(irg, block, left, c, mode);
 940                         } else {
 941                                 env->entries[idx]->low_word = left;
 942                         }  /* if */
 943                         env->entries[idx]->high_word = new_r_Const(irg, block, mode, get_mode_null(mode));
 944
 945                         return;
 946                 }  /* if */
 947         }  /* if */
 948         lower_Shiftop(node, mode, env);
 949 }  /* lower_Shr */
 950
 951 /**
 952  * Translate a Shl and handle special cases.
 953  */
 954 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env) {
 955         ir_node  *right = get_Shl_right(node);
 956         ir_graph *irg = current_ir_graph;
 957
 958         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 959                 tarval *tv = get_Const_tarval(right);
 960
 961                 if (tarval_is_long(tv) &&
 962                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 963                         ir_mode *mode_l;
 964                         ir_node *block = get_nodes_block(node);
 965                         ir_node *left = get_Shl_left(node);
 966                         ir_node *c;
 967                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 968                         int idx = get_irn_idx(left);
 969
 970                         left = new_r_Conv(irg, block, env->entries[idx]->low_word, mode);
 971                         idx = get_irn_idx(node);
 972
 973                         if (shf_cnt > 0) {
 974                                 c = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
 975                                 env->entries[idx]->high_word = new_r_Shl(irg, block, left, c, mode);
 976                         } else {
 977                                 env->entries[idx]->high_word = left;
 978                         }  /* if */
 979                         mode_l = env->params->low_unsigned;
 980                         env->entries[idx]->low_word  = new_r_Const(irg, block, mode_l, get_mode_null(mode_l));
 981
 982                         return;
 983                 }  /* if */
 984         }  /* if */
 985         lower_Shiftop(node, mode, env);
 986 }  /* lower_Shl */
 987
 988 /**
 989  * Translate a Shrs and handle special cases.
 990  */
 991 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env) {
 992         ir_node  *right = get_Shrs_right(node);
 993         ir_graph *irg = current_ir_graph;
 994
 995         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 996                 tarval *tv = get_Const_tarval(right);
 997
 998                 if (tarval_is_long(tv) &&
 999                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
1000                         ir_node *block   = get_nodes_block(node);
1001                         ir_node *left    = get_Shrs_left(node);
1002                         long     shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
1003                         int      idx     = get_irn_idx(left);
1004                         ir_node *low;
1005                         ir_node *c;
1006
1007                         left = env->entries[idx]->high_word;
1008                         idx = get_irn_idx(node);
1009
1010                         if (shf_cnt > 0) {
1011                                 c   = new_r_Const_long(irg, block, mode_Iu, shf_cnt);
1012                                 low = new_r_Shrs(irg, block, left, c, mode);
1013                         } else {
1014                                 low = left;
1015                         }  /* if */
1016                         /* low word is expected to have mode_Iu */
1017                         env->entries[idx]->low_word = new_r_Conv(irg, block, low, mode_Iu);
1018
1019                         c = new_r_Const_long(irg, block, mode_Iu, get_mode_size_bits(mode) - 1);
1020                         env->entries[idx]->high_word = new_r_Shrs(irg, block, left, c, mode);
1021
1022                         return;
1023                 }  /* if */
1024         }  /* if */
1025         lower_Shiftop(node, mode, env);
1026 }  /* lower_Shrs */
1027
1028 /**
1029  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1030  */
1031 static void prepare_links_and_handle_rotl(ir_node *node, void *env) {
1032         lower_env_t *lenv = env;
1033
1034         if (is_Rotl(node)) {
1035                 ir_mode *mode = get_irn_op_mode(node);
1036                         if (mode == lenv->params->high_signed ||
1037                             mode == lenv->params->high_unsigned) {
1038                                 ir_node  *right = get_Rotl_right(node);
1039                                 ir_node  *left, *shl, *shr, *or, *block, *sub, *c;
1040                                 ir_mode  *omode, *rmode;
1041                                 ir_graph *irg;
1042                                 dbg_info *dbg;
1043                                 optimization_state_t state;
1044
1045                                 if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1046                                         tarval *tv = get_Const_tarval(right);
1047
1048                                         if (tarval_is_long(tv) &&
1049                                             get_tarval_long(tv) == (long)get_mode_size_bits(mode)) {
1050                                                 /* will be optimized in lower_Rotl() */
1051                                                 return;
1052                                         }
1053                                 }
1054
1055                                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) and lower those */
1056                                 dbg   = get_irn_dbg_info(node);
1057                                 omode = get_irn_mode(node);
1058                                 left  = get_Rotl_left(node);
1059                                 irg   = current_ir_graph;
1060                                 block = get_nodes_block(node);
1061                                 shl   = new_rd_Shl(dbg, irg, block, left, right, omode);
1062                                 rmode = get_irn_mode(right);
1063                                 c     = new_Const_long(rmode, get_mode_size_bits(omode));
1064                                 sub   = new_rd_Sub(dbg, irg, block, c, right, rmode);
1065                                 shr   = new_rd_Shr(dbg, irg, block, left, sub, omode);
1066
1067                                 /* optimization must be switched off here, or we will get the Rotl back */
1068                                 save_optimization_state(&state);
1069                                 set_opt_algebraic_simplification(0);
1070                                 or = new_rd_Or(dbg, irg, block, shl, shr, omode);
1071                                 restore_optimization_state(&state);
1072
1073                                 exchange(node, or);
1074
1075                                 /* do lowering on the new nodes */
1076                                 prepare_links(shl, env);
1077                                 prepare_links(c, env);
1078                                 prepare_links(sub, env);
1079                                 prepare_links(shr, env);
1080                                 prepare_links(or, env);
1081                         }
1082         } else {
1083                 prepare_links(node, env);
1084         }
1085 }
1086
1087 /**
1088  * Translate a special case Rotl(x, sizeof(w)).
1089  */
1090 static void lower_Rotl(ir_node *node, ir_mode *mode, lower_env_t *env) {
1091         ir_node *right = get_Rotl_right(node);
1092         ir_node *left = get_Rotl_left(node);
1093         ir_node *h, *l;
1094         int idx = get_irn_idx(left);
1095         (void) right;
1096         (void) mode;
1097
1098         assert(get_mode_arithmetic(mode) == irma_twos_complement &&
1099                is_Const(right) && tarval_is_long(get_Const_tarval(right)) &&
1100                get_tarval_long(get_Const_tarval(right)) == (long)get_mode_size_bits(mode));
1101
1102         l = env->entries[idx]->low_word;
1103         h = env->entries[idx]->high_word;
1104         idx = get_irn_idx(node);
1105
1106         env->entries[idx]->low_word  = h;
1107         env->entries[idx]->high_word = l;
1108 }  /* lower_Rotl */
1109
1110 /**
1111  * Translate an Unop.
1112  *
1113  * Create an intrinsic Call.
1114  */
1115 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env) {
1116         ir_node  *block, *irn;
1117         ir_node  *in[2];
1118         dbg_info *dbg;
1119         ir_type  *mtp;
1120         int      idx;
1121         ir_graph *irg;
1122         node_entry_t *entry;
1123
1124         irn   = get_unop_op(node);
1125         entry = env->entries[get_irn_idx(irn)];
1126         assert(entry);
1127
1128         if (! entry->low_word) {
1129                 /* not ready yet, wait */
1130                 pdeq_putr(env->waitq, node);
1131                 return;
1132         }  /* if */
1133
1134         in[0] = entry->low_word;
1135         in[1] = entry->high_word;
1136
1137         dbg   = get_irn_dbg_info(node);
1138         block = get_nodes_block(node);
1139         irg   = current_ir_graph;
1140
1141         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1142         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
1143         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
1144                 irn, 2, in, mtp);
1145         set_irn_pinned(irn, get_irn_pinned(node));
1146         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
1147
1148         idx = get_irn_idx(node);
1149         assert(idx < env->n_entries);
1150         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
1151         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
1152 }  /* lower_Unop */
1153
1154 /**
1155  * Translate a logical Binop.
1156  *
1157  * Create two logical Binops.
1158  */
1159 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1160                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_graph *irg, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1161         ir_node  *block, *irn;
1162         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1163         dbg_info *dbg;
1164         int      idx;
1165         ir_graph *irg;
1166         node_entry_t *entry;
1167
1168         irn   = get_binop_left(node);
1169         entry = env->entries[get_irn_idx(irn)];
1170         assert(entry);
1171
1172         if (! entry->low_word) {
1173                 /* not ready yet, wait */
1174                 pdeq_putr(env->waitq, node);
1175                 return;
1176         }  /* if */
1177
1178         lop_l = entry->low_word;
1179         lop_h = entry->high_word;
1180
1181         irn   = get_binop_right(node);
1182         entry = env->entries[get_irn_idx(irn)];
1183         assert(entry);
1184
1185         if (! entry->low_word) {
1186                 /* not ready yet, wait */
1187                 pdeq_putr(env->waitq, node);
1188                 return;
1189         }  /* if */
1190
1191         rop_l = entry->low_word;
1192         rop_h = entry->high_word;
1193
1194         dbg = get_irn_dbg_info(node);
1195         block = get_nodes_block(node);
1196
1197         idx = get_irn_idx(node);
1198         assert(idx < env->n_entries);
1199         irg = current_ir_graph;
1200         env->entries[idx]->low_word  = constr_rd(dbg, irg, block, lop_l, rop_l, env->params->low_unsigned);
1201         env->entries[idx]->high_word = constr_rd(dbg, irg, block, lop_h, rop_h, mode);
1202 }  /* lower_Binop_logical */
1203
1204 /** create a logical operation transformation */
1205 #define lower_logical(op)                                                \
1206 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1207         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1208 }
1209
1210 lower_logical(And)
1211 lower_logical(Or)
1212 lower_logical(Eor)
1213
1214 /**
1215  * Translate a Not.
1216  *
1217  * Create two logical Nots.
1218  */
1219 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env) {
1220         ir_node  *block, *irn;
1221         ir_node  *op_l, *op_h;
1222         dbg_info *dbg;
1223         int      idx;
1224         ir_graph *irg;
1225         node_entry_t *entry;
1226
1227         irn   = get_Not_op(node);
1228         entry = env->entries[get_irn_idx(irn)];
1229         assert(entry);
1230
1231         if (! entry->low_word) {
1232                 /* not ready yet, wait */
1233                 pdeq_putr(env->waitq, node);
1234                 return;
1235         }  /* if */
1236
1237         op_l = entry->low_word;
1238         op_h = entry->high_word;
1239
1240         dbg   = get_irn_dbg_info(node);
1241         block = get_nodes_block(node);
1242         irg   = current_ir_graph;
1243
1244         idx = get_irn_idx(node);
1245         assert(idx < env->n_entries);
1246         env->entries[idx]->low_word  = new_rd_Not(dbg, current_ir_graph, block, op_l, env->params->low_unsigned);
1247         env->entries[idx]->high_word = new_rd_Not(dbg, current_ir_graph, block, op_h, mode);
1248 }  /* lower_Not */
1249
1250 /**
1251  * Translate a Cond.
1252  */
1253 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
1254         ir_node *cmp, *left, *right, *block;
1255         ir_node *sel = get_Cond_selector(node);
1256         ir_mode *m = get_irn_mode(sel);
1257         int     idx;
1258         (void) mode;
1259
1260         if (m == mode_b) {
1261                 node_entry_t *lentry, *rentry;
1262                 ir_node  *proj, *projT = NULL, *projF = NULL;
1263                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1264                 ir_node  *projHF, *projHT;
1265                 ir_node  *dst_blk;
1266                 ir_graph *irg;
1267                 pn_Cmp   pnc;
1268                 dbg_info *dbg;
1269
1270                 if(!is_Proj(sel))
1271                         return;
1272
1273                 cmp   = get_Proj_pred(sel);
1274                 if(!is_Cmp(cmp))
1275                         return;
1276
1277                 left  = get_Cmp_left(cmp);
1278                 idx   = get_irn_idx(left);
1279                 lentry = env->entries[idx];
1280
1281                 if (! lentry) {
1282                         /* a normal Cmp */
1283                         return;
1284                 }  /* if */
1285
1286                 right = get_Cmp_right(cmp);
1287                 idx   = get_irn_idx(right);
1288                 rentry = env->entries[idx];
1289                 assert(rentry);
1290
1291                 if (! lentry->low_word || !rentry->low_word) {
1292                         /* not yet ready */
1293                         pdeq_putr(env->waitq, node);
1294                         return;
1295                 }  /* if */
1296
1297                 /* all right, build the code */
1298                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1299                         long proj_nr = get_Proj_proj(proj);
1300
1301                         if (proj_nr == pn_Cond_true) {
1302                                 assert(projT == NULL && "more than one Proj(true)");
1303                                 projT = proj;
1304                         } else {
1305                                 assert(proj_nr == pn_Cond_false);
1306                                 assert(projF == NULL && "more than one Proj(false)");
1307                                 projF = proj;
1308                         }  /* if */
1309                         mark_irn_visited(proj);
1310                 }  /* for */
1311                 assert(projT && projF);
1312
1313                 /* create a new high compare */
1314                 block = get_nodes_block(node);
1315                 dbg   = get_irn_dbg_info(cmp);
1316                 irg   = current_ir_graph;
1317                 pnc   = get_Proj_proj(sel);
1318
1319                 if (is_Const(right) && is_Const_null(right)) {
1320                         if (pnc == pn_Cmp_Eq || pnc == pn_Cmp_Lg) {
1321                                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1322                                 ir_mode *mode = env->params->low_unsigned;
1323                                 ir_node *low  = new_r_Conv(irg, block, lentry->low_word, mode);
1324                                 ir_node *high = new_r_Conv(irg, block, lentry->high_word, mode);
1325                                 ir_node *or   = new_rd_Or(dbg, irg, block, low, high, mode);
1326                                 ir_node *cmp  = new_rd_Cmp(dbg, irg, block, or, new_Const_long(mode, 0));
1327
1328                                 ir_node *proj = new_r_Proj(irg, block, cmp, mode_b, pnc);
1329                                 set_Cond_selector(node, proj);
1330                                 return;
1331                         }
1332                 }
1333
1334                 cmpH = new_rd_Cmp(dbg, irg, block, lentry->high_word, rentry->high_word);
1335
1336                 if (pnc == pn_Cmp_Eq) {
1337                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1338                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1339
1340                         assert(entry);
1341                         dst_blk = entry->value;
1342
1343                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Eq);
1344                         dbg = get_irn_dbg_info(node);
1345                         irn = new_rd_Cond(dbg, irg, block, irn);
1346
1347                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1348                         mark_irn_visited(projHF);
1349                         exchange(projF, projHF);
1350
1351                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1352                         mark_irn_visited(projHT);
1353
1354                         new_bl = new_r_Block(irg, 1, &projHT);
1355
1356                         dbg   = get_irn_dbg_info(cmp);
1357                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1358                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Eq);
1359                         dbg = get_irn_dbg_info(node);
1360                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1361
1362                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1363                         mark_irn_visited(proj);
1364                         add_block_cf_input(dst_blk, projHF, proj);
1365
1366                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1367                         mark_irn_visited(proj);
1368                         exchange(projT, proj);
1369                 } else if (pnc == pn_Cmp_Lg) {
1370                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1371                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1372
1373                         assert(entry);
1374                         dst_blk = entry->value;
1375
1376                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Lg);
1377                         dbg = get_irn_dbg_info(node);
1378                         irn = new_rd_Cond(dbg, irg, block, irn);
1379
1380                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1381                         mark_irn_visited(projHT);
1382                         exchange(projT, projHT);
1383
1384                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1385                         mark_irn_visited(projHF);
1386
1387                         new_bl = new_r_Block(irg, 1, &projHF);
1388
1389                         dbg   = get_irn_dbg_info(cmp);
1390                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1391                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Lg);
1392                         dbg = get_irn_dbg_info(node);
1393                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1394
1395                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1396                         mark_irn_visited(proj);
1397                         add_block_cf_input(dst_blk, projHT, proj);
1398
1399                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1400                         mark_irn_visited(proj);
1401                         exchange(projF, proj);
1402                 } else {
1403                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1404                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1405                         pmap_entry *entry;
1406
1407                         entry = pmap_find(env->proj_2_block, projT);
1408                         assert(entry);
1409                         dstT = entry->value;
1410
1411                         entry = pmap_find(env->proj_2_block, projF);
1412                         assert(entry);
1413                         dstF = entry->value;
1414
1415                         irn = new_r_Proj(irg, block, cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1416                         dbg = get_irn_dbg_info(node);
1417                         irn = new_rd_Cond(dbg, irg, block, irn);
1418
1419                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1420                         mark_irn_visited(projHT);
1421                         exchange(projT, projHT);
1422                         projT = projHT;
1423
1424                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1425                         mark_irn_visited(projHF);
1426
1427                         newbl_eq = new_r_Block(irg, 1, &projHF);
1428
1429                         irn = new_r_Proj(irg, newbl_eq, cmpH, mode_b, pn_Cmp_Eq);
1430                         irn = new_rd_Cond(dbg, irg, newbl_eq, irn);
1431
1432                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_false);
1433                         mark_irn_visited(proj);
1434                         exchange(projF, proj);
1435                         projF = proj;
1436
1437                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_true);
1438                         mark_irn_visited(proj);
1439
1440                         newbl_l = new_r_Block(irg, 1, &proj);
1441
1442                         dbg   = get_irn_dbg_info(cmp);
1443                         cmpL = new_rd_Cmp(dbg, irg, newbl_l, lentry->low_word, rentry->low_word);
1444                         irn = new_r_Proj(irg, newbl_l, cmpL, mode_b, pnc);
1445                         dbg = get_irn_dbg_info(node);
1446                         irn = new_rd_Cond(dbg, irg, newbl_l, irn);
1447
1448                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_true);
1449                         mark_irn_visited(proj);
1450                         add_block_cf_input(dstT, projT, proj);
1451
1452                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_false);
1453                         mark_irn_visited(proj);
1454                         add_block_cf_input(dstF, projF, proj);
1455                 }  /* if */
1456
1457                 /* we have changed the control flow */
1458                 env->flags |= CF_CHANGED;
1459         } else {
1460                 idx = get_irn_idx(sel);
1461
1462                 if (env->entries[idx]) {
1463                         /*
1464                            Bad, a jump-table with double-word index.
1465                            This should not happen, but if it does we handle
1466                            it like a Conv were between (in other words, ignore
1467                            the high part.
1468                          */
1469
1470                         if (! env->entries[idx]->low_word) {
1471                                 /* not ready yet, wait */
1472                                 pdeq_putr(env->waitq, node);
1473                                 return;
1474                         }  /* if */
1475                         set_Cond_selector(node, env->entries[idx]->low_word);
1476                 }  /* if */
1477         }  /* if */
1478 }  /* lower_Cond */
1479
1480 /**
1481  * Translate a Conv to higher_signed
1482  */
1483 static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
1484         ir_node  *op    = get_Conv_op(node);
1485         ir_mode  *imode = get_irn_mode(op);
1486         ir_mode  *dst_mode_l = env->params->low_unsigned;
1487         ir_mode  *dst_mode_h = env->params->low_signed;
1488         int      idx = get_irn_idx(node);
1489         ir_graph *irg = current_ir_graph;
1490         ir_node  *block = get_nodes_block(node);
1491         dbg_info *dbg = get_irn_dbg_info(node);
1492
1493         assert(idx < env->n_entries);
1494
1495         if (mode_is_int(imode) || mode_is_reference(imode)) {
1496                 if (imode == env->params->high_unsigned) {
1497                         /* a Conv from Lu to Ls */
1498                         int op_idx = get_irn_idx(op);
1499
1500                         if (! env->entries[op_idx]->low_word) {
1501                                 /* not ready yet, wait */
1502                                 pdeq_putr(env->waitq, node);
1503                                 return;
1504                         }  /* if */
1505                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word,  dst_mode_l);
1506                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode_h);
1507                 } else {
1508                         /* simple case: create a high word */
1509                         if (imode != dst_mode_l)
1510                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode_l);
1511
1512                         env->entries[idx]->low_word  = op;
1513
1514                         if (mode_is_signed(imode)) {
1515                                 ir_node *op_conv = new_rd_Conv(dbg, irg, block, op, dst_mode_h);
1516                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op_conv,
1517                                         new_Const_long(mode_Iu, get_mode_size_bits(dst_mode_h) - 1), dst_mode_h);
1518                         } else {
1519                                 env->entries[idx]->high_word = new_Const(dst_mode_h, get_mode_null(dst_mode_h));
1520                         }  /* if */
1521                 }  /* if */
1522         } else {
1523                 ir_node *irn, *call;
1524                 ir_mode *omode = env->params->high_signed;
1525                 ir_type *mtp = get_conv_type(imode, omode, env);
1526
1527                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1528                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1529                 set_irn_pinned(call, get_irn_pinned(node));
1530                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1531
1532                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode_l, 0);
1533                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode_h, 1);
1534         }  /* if */
1535 }  /* lower_Conv_to_Ls */
1536
1537 /**
1538  * Translate a Conv to higher_unsigned
1539  */
1540 static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
1541         ir_node  *op    = get_Conv_op(node);
1542         ir_mode  *imode = get_irn_mode(op);
1543         ir_mode  *dst_mode = env->params->low_unsigned;
1544         int      idx = get_irn_idx(node);
1545         ir_graph *irg = current_ir_graph;
1546         ir_node  *block = get_nodes_block(node);
1547         dbg_info *dbg = get_irn_dbg_info(node);
1548
1549         assert(idx < env->n_entries);
1550
1551         if (mode_is_int(imode) || mode_is_reference(imode)) {
1552                 if (imode == env->params->high_signed) {
1553                         /* a Conv from Ls to Lu */
1554                         int op_idx = get_irn_idx(op);
1555
1556                         if (! env->entries[op_idx]->low_word) {
1557                                 /* not ready yet, wait */
1558                                 pdeq_putr(env->waitq, node);
1559                                 return;
1560                         }  /* if */
1561                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word, dst_mode);
1562                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode);
1563                 } else {
1564                         /* simple case: create a high word */
1565                         if (imode != dst_mode)
1566                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode);
1567
1568                         env->entries[idx]->low_word  = op;
1569
1570                         if (mode_is_signed(imode)) {
1571                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op,
1572                                         new_Const_long(mode_Iu, get_mode_size_bits(dst_mode) - 1), dst_mode);
1573                         } else {
1574                                 env->entries[idx]->high_word = new_Const(dst_mode, get_mode_null(dst_mode));
1575                         }  /* if */
1576                 }  /* if */
1577         } else {
1578                 ir_node *irn, *call;
1579                 ir_mode *omode = env->params->high_unsigned;
1580                 ir_type *mtp = get_conv_type(imode, omode, env);
1581
1582                 /* do an intrinsic call */
1583                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1584                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1585                 set_irn_pinned(call, get_irn_pinned(node));
1586                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1587
1588                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode, 0);
1589                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode, 1);
1590         }  /* if */
1591 }  /* lower_Conv_to_Lu */
1592
1593 /**
1594  * Translate a Conv from higher_signed
1595  */
1596 static void lower_Conv_from_Ls(ir_node *node, lower_env_t *env) {
1597         ir_node  *op    = get_Conv_op(node);
1598         ir_mode  *omode = get_irn_mode(node);
1599         ir_node  *block = get_nodes_block(node);
1600         dbg_info *dbg = get_irn_dbg_info(node);
1601         int      idx = get_irn_idx(op);
1602         ir_graph *irg = current_ir_graph;
1603
1604         assert(idx < env->n_entries);
1605
1606         if (! env->entries[idx]->low_word) {
1607                 /* not ready yet, wait */
1608                 pdeq_putr(env->waitq, node);
1609                 return;
1610         }  /* if */
1611
1612         if (mode_is_int(omode) || mode_is_reference(omode)) {
1613                 op = env->entries[idx]->low_word;
1614
1615                 /* simple case: create a high word */
1616                 if (omode != env->params->low_signed)
1617                         op = new_rd_Conv(dbg, irg, block, op, omode);
1618
1619                 set_Conv_op(node, op);
1620         } else {
1621                 ir_node *irn, *call, *in[2];
1622                 ir_mode *imode = env->params->high_signed;
1623                 ir_type *mtp = get_conv_type(imode, omode, env);
1624
1625                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1626                 in[0] = env->entries[idx]->low_word;
1627                 in[1] = env->entries[idx]->high_word;
1628
1629                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1630                 set_irn_pinned(call, get_irn_pinned(node));
1631                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1632
1633                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1634         }  /* if */
1635 }  /* lower_Conv_from_Ls */
1636
1637 /**
1638  * Translate a Conv from higher_unsigned
1639  */
1640 static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
1641         ir_node  *op    = get_Conv_op(node);
1642         ir_mode  *omode = get_irn_mode(node);
1643         ir_node  *block = get_nodes_block(node);
1644         dbg_info *dbg = get_irn_dbg_info(node);
1645         int      idx = get_irn_idx(op);
1646         ir_graph *irg = current_ir_graph;
1647
1648         assert(idx < env->n_entries);
1649
1650         if (! env->entries[idx]->low_word) {
1651                 /* not ready yet, wait */
1652                 pdeq_putr(env->waitq, node);
1653                 return;
1654         }  /* if */
1655
1656         if (mode_is_int(omode) || mode_is_reference(omode)) {
1657                 op = env->entries[idx]->low_word;
1658
1659                 /* simple case: create a high word */
1660                 if (omode != env->params->low_unsigned)
1661                         op = new_rd_Conv(dbg, irg, block, op, omode);
1662
1663                 set_Conv_op(node, op);
1664         } else {
1665                 ir_node *irn, *call, *in[2];
1666                 ir_mode *imode = env->params->high_unsigned;
1667                 ir_type *mtp = get_conv_type(imode, omode, env);
1668
1669                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1670                 in[0] = env->entries[idx]->low_word;
1671                 in[1] = env->entries[idx]->high_word;
1672
1673                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1674                 set_irn_pinned(call, get_irn_pinned(node));
1675                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1676
1677                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1678         }  /* if */
1679 }  /* lower_Conv_from_Lu */
1680
1681 /**
1682  * Translate a Conv.
1683  */
1684 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env) {
1685         mode = get_irn_mode(node);
1686
1687         if (mode == env->params->high_signed) {
1688                 lower_Conv_to_Ls(node, env);
1689         } else if (mode == env->params->high_unsigned) {
1690                 lower_Conv_to_Lu(node, env);
1691         } else {
1692                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1693
1694                 if (mode == env->params->high_signed) {
1695                         lower_Conv_from_Ls(node, env);
1696                 } else if (mode == env->params->high_unsigned) {
1697                         lower_Conv_from_Lu(node, env);
1698                 }  /* if */
1699         }  /* if */
1700 }  /* lower_Conv */
1701
1702 /**
1703  * Lower the method type.
1704  */
1705 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
1706         pmap_entry *entry;
1707         ident      *id;
1708         ir_type    *res;
1709
1710         if (is_lowered_type(mtp))
1711                 return mtp;
1712
1713         entry = pmap_find(lowered_type, mtp);
1714         if (! entry) {
1715                 int i, n, r, n_param, n_res;
1716
1717                 /* count new number of params */
1718                 n_param = n = get_method_n_params(mtp);
1719                 for (i = n_param - 1; i >= 0; --i) {
1720                         ir_type *tp = get_method_param_type(mtp, i);
1721
1722                         if (is_Primitive_type(tp)) {
1723                                 ir_mode *mode = get_type_mode(tp);
1724
1725                                 if (mode == env->params->high_signed ||
1726                                         mode == env->params->high_unsigned)
1727                                         ++n_param;
1728                         }  /* if */
1729                 }  /* for */
1730
1731                 /* count new number of results */
1732                 n_res = r = get_method_n_ress(mtp);
1733                 for (i = n_res - 1; i >= 0; --i) {
1734                         ir_type *tp = get_method_res_type(mtp, i);
1735
1736                         if (is_Primitive_type(tp)) {
1737                                 ir_mode *mode = get_type_mode(tp);
1738
1739                                 if (mode == env->params->high_signed ||
1740                                         mode == env->params->high_unsigned)
1741                                         ++n_res;
1742                         }  /* if */
1743                 }  /* for */
1744
1745                 id = mangle_u(new_id_from_chars("L", 1), get_type_ident(mtp));
1746                 res = new_type_method(id, n_param, n_res);
1747
1748                 /* set param types and result types */
1749                 for (i = n_param = 0; i < n; ++i) {
1750                         ir_type *tp = get_method_param_type(mtp, i);
1751
1752                         if (is_Primitive_type(tp)) {
1753                                 ir_mode *mode = get_type_mode(tp);
1754
1755                                 if (mode == env->params->high_signed) {
1756                                         set_method_param_type(res, n_param++, tp_u);
1757                                         set_method_param_type(res, n_param++, tp_s);
1758                                 } else if (mode == env->params->high_unsigned) {
1759                                         set_method_param_type(res, n_param++, tp_u);
1760                                         set_method_param_type(res, n_param++, tp_u);
1761                                 } else {
1762                                         set_method_param_type(res, n_param++, tp);
1763                                 }  /* if */
1764                         } else {
1765                                 set_method_param_type(res, n_param++, tp);
1766                         }  /* if */
1767                 }  /* for */
1768                 for (i = n_res = 0; i < r; ++i) {
1769                         ir_type *tp = get_method_res_type(mtp, i);
1770
1771                         if (is_Primitive_type(tp)) {
1772                                 ir_mode *mode = get_type_mode(tp);
1773
1774                                 if (mode == env->params->high_signed) {
1775                                         set_method_res_type(res, n_res++, tp_u);
1776                                         set_method_res_type(res, n_res++, tp_s);
1777                                 } else if (mode == env->params->high_unsigned) {
1778                                         set_method_res_type(res, n_res++, tp_u);
1779                                         set_method_res_type(res, n_res++, tp_u);
1780                                 } else {
1781                                         set_method_res_type(res, n_res++, tp);
1782                                 }  /* if */
1783                         } else {
1784                                 set_method_res_type(res, n_res++, tp);
1785                         }  /* if */
1786                 }  /* for */
1787                 set_lowered_type(mtp, res);
1788                 pmap_insert(lowered_type, mtp, res);
1789         } else {
1790                 res = entry->value;
1791         }  /* if */
1792         return res;
1793 }  /* lower_mtp */
1794
1795 /**
1796  * Translate a Return.
1797  */
1798 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
1799         ir_graph  *irg = current_ir_graph;
1800         ir_entity *ent = get_irg_entity(irg);
1801         ir_type   *mtp = get_entity_type(ent);
1802         ir_node   **in;
1803         int       i, j, n, idx;
1804         int       need_conv = 0;
1805         (void) mode;
1806
1807         /* check if this return must be lowered */
1808         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1809                 ir_node *pred = get_Return_res(node, i);
1810                 ir_mode *mode = get_irn_op_mode(pred);
1811
1812                 if (mode == env->params->high_signed ||
1813                         mode == env->params->high_unsigned) {
1814                         idx = get_irn_idx(pred);
1815                         if (! env->entries[idx]->low_word) {
1816                                 /* not ready yet, wait */
1817                                 pdeq_putr(env->waitq, node);
1818                                 return;
1819                         }  /* if */
1820                         need_conv = 1;
1821                 }  /* if */
1822         }  /* for */
1823         if (! need_conv)
1824                 return;
1825
1826         ent = get_irg_entity(irg);
1827         mtp = get_entity_type(ent);
1828
1829         mtp = lower_mtp(mtp, env);
1830         set_entity_type(ent, mtp);
1831
1832         /* create a new in array */
1833         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1834         in[0] = get_Return_mem(node);
1835
1836         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1837                 ir_node *pred = get_Return_res(node, i);
1838
1839                 idx = get_irn_idx(pred);
1840                 assert(idx < env->n_entries);
1841
1842                 if (env->entries[idx]) {
1843                         in[++j] = env->entries[idx]->low_word;
1844                         in[++j] = env->entries[idx]->high_word;
1845                 } else {
1846                         in[++j] = pred;
1847                 }  /* if */
1848         }  /* for */
1849
1850         set_irn_in(node, j+1, in);
1851 }  /* lower_Return */
1852
1853 /**
1854  * Translate the parameters.
1855  */
1856 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env) {
1857         ir_graph  *irg = current_ir_graph;
1858         ir_entity *ent = get_irg_entity(irg);
1859         ir_type   *tp  = get_entity_type(ent);
1860         ir_type   *mtp;
1861         long      *new_projs;
1862         int       i, j, n_params, rem;
1863         ir_node   *proj, *args;
1864         (void) mode;
1865
1866         if (is_lowered_type(tp)) {
1867                 mtp = get_associated_type(tp);
1868         } else {
1869                 mtp = tp;
1870         }  /* if */
1871         assert(! is_lowered_type(mtp));
1872
1873         n_params = get_method_n_params(mtp);
1874         if (n_params <= 0)
1875                 return;
1876
1877         NEW_ARR_A(long, new_projs, n_params);
1878
1879         /* first check if we have parameters that must be fixed */
1880         for (i = j = 0; i < n_params; ++i, ++j) {
1881                 ir_type *tp = get_method_param_type(mtp, i);
1882
1883                 new_projs[i] = j;
1884                 if (is_Primitive_type(tp)) {
1885                         ir_mode *mode = get_type_mode(tp);
1886
1887                         if (mode == env->params->high_signed ||
1888                                 mode == env->params->high_unsigned)
1889                                 ++j;
1890                 }  /* if */
1891         }  /* for */
1892         if (i == j)
1893                 return;
1894
1895         mtp = lower_mtp(mtp, env);
1896         set_entity_type(ent, mtp);
1897
1898         /* switch off optimization for new Proj nodes or they might be CSE'ed
1899            with not patched one's */
1900         rem = get_optimize();
1901         set_optimize(0);
1902
1903         /* ok, fix all Proj's and create new ones */
1904         args = get_irg_args(irg);
1905         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1906                 ir_node *pred = get_Proj_pred(proj);
1907                 long proj_nr;
1908                 int idx;
1909                 ir_mode *mode;
1910                 dbg_info *dbg;
1911
1912                 /* do not visit this node again */
1913                 mark_irn_visited(proj);
1914
1915                 if (pred != args)
1916                         continue;
1917
1918                 proj_nr = get_Proj_proj(proj);
1919                 set_Proj_proj(proj, new_projs[proj_nr]);
1920
1921                 idx = get_irn_idx(proj);
1922                 if (env->entries[idx]) {
1923                         ir_mode *low_mode = env->params->low_unsigned;
1924
1925                         mode = get_irn_mode(proj);
1926
1927                         if (mode == env->params->high_signed) {
1928                                 mode = env->params->low_signed;
1929                         } else {
1930                                 mode = env->params->low_unsigned;
1931                         }  /* if */
1932
1933                         dbg = get_irn_dbg_info(proj);
1934                         env->entries[idx]->low_word  =
1935                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, low_mode, new_projs[proj_nr]);
1936                         env->entries[idx]->high_word =
1937                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, mode, new_projs[proj_nr] + 1);
1938                 }  /* if */
1939         }  /* for */
1940         set_optimize(rem);
1941 }  /* lower_Start */
1942
1943 /**
1944  * Translate a Call.
1945  */
1946 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
1947         ir_graph *irg = current_ir_graph;
1948         ir_type  *tp = get_Call_type(node);
1949         ir_type  *call_tp;
1950         ir_node  **in, *proj, *results;
1951         int      n_params, n_res, need_lower = 0;
1952         int      i, j;
1953         long     *res_numbers = NULL;
1954         (void) mode;
1955
1956         if (is_lowered_type(tp)) {
1957                 call_tp = get_associated_type(tp);
1958         } else {
1959                 call_tp = tp;
1960         }  /* if */
1961
1962         assert(! is_lowered_type(call_tp));
1963
1964         n_params = get_method_n_params(call_tp);
1965         for (i = 0; i < n_params; ++i) {
1966                 ir_type *tp = get_method_param_type(call_tp, i);
1967
1968                 if (is_Primitive_type(tp)) {
1969                         ir_mode *mode = get_type_mode(tp);
1970
1971                         if (mode == env->params->high_signed ||
1972                                 mode == env->params->high_unsigned) {
1973                                 need_lower = 1;
1974                                 break;
1975                         }  /* if */
1976                 }  /* if */
1977         }  /* for */
1978         n_res = get_method_n_ress(call_tp);
1979         if (n_res > 0) {
1980                 NEW_ARR_A(long, res_numbers, n_res);
1981
1982                 for (i = j = 0; i < n_res; ++i, ++j) {
1983                         ir_type *tp = get_method_res_type(call_tp, i);
1984
1985                         res_numbers[i] = j;
1986                         if (is_Primitive_type(tp)) {
1987                                 ir_mode *mode = get_type_mode(tp);
1988
1989                                 if (mode == env->params->high_signed ||
1990                                         mode == env->params->high_unsigned) {
1991                                         need_lower = 1;
1992                                         ++j;
1993                                 }  /* if */
1994                         }  /* if */
1995                 }  /* for */
1996         }  /* if */
1997
1998         if (! need_lower)
1999                 return;
2000
2001         /* let's lower it */
2002         call_tp = lower_mtp(call_tp, env);
2003         set_Call_type(node, call_tp);
2004
2005         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
2006
2007         in[0] = get_Call_mem(node);
2008         in[1] = get_Call_ptr(node);
2009
2010         for (j = 2, i = 0; i < n_params; ++i) {
2011                 ir_node *pred = get_Call_param(node, i);
2012                 int     idx = get_irn_idx(pred);
2013
2014                 if (env->entries[idx]) {
2015                         if (! env->entries[idx]->low_word) {
2016                                 /* not ready yet, wait */
2017                                 pdeq_putr(env->waitq, node);
2018                                 return;
2019                         }
2020                         in[j++] = env->entries[idx]->low_word;
2021                         in[j++] = env->entries[idx]->high_word;
2022                 } else {
2023                         in[j++] = pred;
2024                 }  /* if */
2025         }  /* for */
2026
2027         set_irn_in(node, j, in);
2028
2029         /* fix the results */
2030         results = NULL;
2031         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
2032                 long proj_nr = get_Proj_proj(proj);
2033
2034                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
2035                         /* found the result proj */
2036                         results = proj;
2037                         break;
2038                 }  /* if */
2039         }  /* for */
2040
2041         if (results) {          /* there are results */
2042                 int rem = get_optimize();
2043
2044                 /* switch off optimization for new Proj nodes or they might be CSE'ed
2045                    with not patched one's */
2046                 set_optimize(0);
2047                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
2048                         if (get_Proj_pred(proj) == results) {
2049                                 long proj_nr = get_Proj_proj(proj);
2050                                 int idx;
2051
2052                                 /* found a result */
2053                                 set_Proj_proj(proj, res_numbers[proj_nr]);
2054                                 idx = get_irn_idx(proj);
2055                                 if (env->entries[idx]) {
2056                                         ir_mode *mode = get_irn_mode(proj);
2057                                         ir_mode *low_mode = env->params->low_unsigned;
2058                                         dbg_info *dbg;
2059
2060                                         if (mode == env->params->high_signed) {
2061                                                 mode = env->params->low_signed;
2062                                         } else {
2063                                                 mode = env->params->low_unsigned;
2064                                         }  /* if */
2065
2066                                         dbg = get_irn_dbg_info(proj);
2067                                         env->entries[idx]->low_word  =
2068                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, low_mode, res_numbers[proj_nr]);
2069                                         env->entries[idx]->high_word =
2070                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, mode, res_numbers[proj_nr] + 1);
2071                                 }  /* if */
2072                                 mark_irn_visited(proj);
2073                         }  /* if */
2074                 }  /* for */
2075                 set_optimize(rem);
2076         }
2077 }  /* lower_Call */
2078
2079 /**
2080  * Translate an Unknown into two.
2081  */
2082 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env) {
2083         int      idx = get_irn_idx(node);
2084         ir_graph *irg = current_ir_graph;
2085         ir_mode  *low_mode = env->params->low_unsigned;
2086
2087         env->entries[idx]->low_word  = new_r_Unknown(irg, low_mode);
2088         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2089 }  /* lower_Unknown */
2090
2091 /**
2092  * Translate a Phi.
2093  *
2094  * First step: just create two templates
2095  */
2096 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
2097         ir_mode  *mode_l = env->params->low_unsigned;
2098         ir_graph *irg = current_ir_graph;
2099         ir_node  *block, *unk_l, *unk_h, *phi_l, *phi_h;
2100         ir_node  **inl, **inh;
2101         dbg_info *dbg;
2102         int      idx, i, arity = get_Phi_n_preds(phi);
2103         int      enq = 0;
2104
2105         idx = get_irn_idx(phi);
2106         if (env->entries[idx]->low_word) {
2107                 /* Phi nodes already build, check for inputs */
2108                 ir_node *phil = env->entries[idx]->low_word;
2109                 ir_node *phih = env->entries[idx]->high_word;
2110
2111                 for (i = 0; i < arity; ++i) {
2112                         ir_node *pred = get_Phi_pred(phi, i);
2113                         int     idx = get_irn_idx(pred);
2114
2115                         if (env->entries[idx]->low_word) {
2116                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2117                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2118                         } else {
2119                                 /* still not ready */
2120                                 pdeq_putr(env->waitq, phi);
2121                                 return;
2122                         }  /* if */
2123                 }  /* for */
2124         }  /* if */
2125
2126         /* first create a new in array */
2127         NEW_ARR_A(ir_node *, inl, arity);
2128         NEW_ARR_A(ir_node *, inh, arity);
2129         unk_l = new_r_Unknown(irg, mode_l);
2130         unk_h = new_r_Unknown(irg, mode);
2131
2132         for (i = 0; i < arity; ++i) {
2133                 ir_node *pred = get_Phi_pred(phi, i);
2134                 int     idx = get_irn_idx(pred);
2135
2136                 if (env->entries[idx]->low_word) {
2137                         inl[i] = env->entries[idx]->low_word;
2138                         inh[i] = env->entries[idx]->high_word;
2139                 } else {
2140                         inl[i] = unk_l;
2141                         inh[i] = unk_h;
2142                         enq = 1;
2143                 }  /* if */
2144         }  /* for */
2145
2146         dbg   = get_irn_dbg_info(phi);
2147         block = get_nodes_block(phi);
2148
2149         idx = get_irn_idx(phi);
2150         assert(idx < env->n_entries);
2151         env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, irg, block, arity, inl, mode_l);
2152         env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, irg, block, arity, inh, mode);
2153
2154         /* Don't forget to link the new Phi nodes into the block! */
2155         set_irn_link(phi_l, get_irn_link(block));
2156         set_irn_link(phi_h, phi_l);
2157         set_irn_link(block, phi_h);
2158
2159         if (enq) {
2160                 /* not yet finished */
2161                 pdeq_putr(env->waitq, phi);
2162         }  /* if */
2163 }  /* lower_Phi */
2164
2165 /**
2166  * Translate a Mux.
2167  */
2168 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env) {
2169         ir_graph *irg = current_ir_graph;
2170         ir_node  *block, *val;
2171         ir_node  *true_l, *true_h, *false_l, *false_h, *sel;
2172         dbg_info *dbg;
2173         int      idx;
2174
2175         val = get_Mux_true(mux);
2176         idx = get_irn_idx(val);
2177         if (env->entries[idx]->low_word) {
2178                 /* Values already build */
2179                 true_l = env->entries[idx]->low_word;
2180                 true_h = env->entries[idx]->high_word;
2181         } else {
2182                 /* still not ready */
2183                 pdeq_putr(env->waitq, mux);
2184                 return;
2185         }  /* if */
2186
2187         val = get_Mux_false(mux);
2188         idx = get_irn_idx(val);
2189         if (env->entries[idx]->low_word) {
2190                 /* Values already build */
2191                 false_l = env->entries[idx]->low_word;
2192                 false_h = env->entries[idx]->high_word;
2193         } else {
2194                 /* still not ready */
2195                 pdeq_putr(env->waitq, mux);
2196                 return;
2197         }  /* if */
2198
2199
2200         sel = get_Mux_sel(mux);
2201
2202         dbg   = get_irn_dbg_info(mux);
2203         block = get_nodes_block(mux);
2204
2205         idx = get_irn_idx(mux);
2206         assert(idx < env->n_entries);
2207         env->entries[idx]->low_word  = new_rd_Mux(dbg, irg, block, sel, false_l, true_l, mode);
2208         env->entries[idx]->high_word = new_rd_Mux(dbg, irg, block, sel, false_h, true_h, mode);
2209 }  /* lower_Mux */
2210
2211 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env)
2212 {
2213         ir_mode *his = env->params->high_signed;
2214         ir_mode *hiu = env->params->high_unsigned;
2215         int      i;
2216         ir_node *n;
2217
2218         (void)mode;
2219
2220         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2221                 ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
2222                 if (op_mode == his || op_mode == hiu) {
2223                         panic("lowering ASM unimplemented");
2224                 }
2225         }
2226
2227         for (n = asmn;;) {
2228                 ir_mode *proj_mode;
2229
2230                 n = get_irn_link(n);
2231                 if (n == NULL)
2232                         break;
2233
2234                 proj_mode = get_irn_mode(n);
2235                 if (proj_mode == his || proj_mode == hiu) {
2236                         panic("lowering ASM unimplemented");
2237                 }
2238         }
2239 }
2240
2241 /**
2242  * check for opcodes that must always be lowered.
2243  */
2244 static int always_lower(ir_opcode code) {
2245         switch (code) {
2246         case iro_ASM:
2247         case iro_Proj:
2248         case iro_Start:
2249         case iro_Call:
2250         case iro_Return:
2251         case iro_Cond:
2252         case iro_Conv:
2253                 return 1;
2254         default:
2255                 return 0;
2256         }  /* switch */
2257 }  /* always_lower */
2258
2259 /**
2260  * lower boolean Proj(Cmp)
2261  */
2262 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env) {
2263         int      lidx, ridx;
2264         ir_node  *l, *r, *low, *high, *t, *res;
2265         pn_Cmp   pnc;
2266         ir_node  *blk;
2267         ir_graph *irg = current_ir_graph;
2268         dbg_info *db;
2269
2270         l    = get_Cmp_left(cmp);
2271         lidx = get_irn_idx(l);
2272         if (! env->entries[lidx]->low_word) {
2273                 /* still not ready */
2274                 return NULL;
2275         }  /* if */
2276
2277         r    = get_Cmp_right(cmp);
2278         ridx = get_irn_idx(r);
2279         if (! env->entries[ridx]->low_word) {
2280                 /* still not ready */
2281                 return NULL;
2282         }  /* if */
2283
2284         pnc  = get_Proj_proj(proj);
2285         blk  = get_nodes_block(cmp);
2286         db   = get_irn_dbg_info(cmp);
2287         low  = new_rd_Cmp(db, irg, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2288         high = new_rd_Cmp(db, irg, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2289
2290         if (pnc == pn_Cmp_Eq) {
2291                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2292                 res = new_rd_And(db, irg, blk,
2293                         new_r_Proj(irg, blk, low, mode_b, pnc),
2294                         new_r_Proj(irg, blk, high, mode_b, pnc),
2295                         mode_b);
2296         } else if (pnc == pn_Cmp_Lg) {
2297                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2298                 res = new_rd_Or(db, irg, blk,
2299                         new_r_Proj(irg, blk, low, mode_b, pnc),
2300                         new_r_Proj(irg, blk, high, mode_b, pnc),
2301                         mode_b);
2302         } else {
2303                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2304                 t = new_rd_And(db, irg, blk,
2305                         new_r_Proj(irg, blk, low, mode_b, pnc),
2306                         new_r_Proj(irg, blk, high, mode_b, pn_Cmp_Eq),
2307                         mode_b);
2308                 res = new_rd_Or(db, irg, blk,
2309                         new_r_Proj(irg, blk, high, mode_b, pnc & ~pn_Cmp_Eq),
2310                         t,
2311                         mode_b);
2312         }  /* if */
2313         return res;
2314 }  /* lower_boolean_Proj_Cmp */
2315
2316 /**
2317  * The type of a lower function.
2318  *
2319  * @param node   the node to be lowered
2320  * @param mode   the low mode for the destination node
2321  * @param env    the lower environment
2322  */
2323 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2324
2325 /**
2326  * Lower a node.
2327  */
2328 static void lower_ops(ir_node *node, void *env)
2329 {
2330         lower_env_t  *lenv = env;
2331         node_entry_t *entry;
2332         int          idx = get_irn_idx(node);
2333         ir_mode      *mode = get_irn_mode(node);
2334
2335         if (mode == mode_b || is_Mux(node) || is_Conv(node)) {
2336                 int i;
2337
2338                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2339                         ir_node *proj = get_irn_n(node, i);
2340
2341                         if (is_Proj(proj)) {
2342                                 ir_node *cmp = get_Proj_pred(proj);
2343
2344                                 if (is_Cmp(cmp)) {
2345                                         ir_node *arg = get_Cmp_left(cmp);
2346
2347                                         mode = get_irn_mode(arg);
2348                                         if (mode == lenv->params->high_signed ||
2349                                                 mode == lenv->params->high_unsigned) {
2350                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2351
2352                                                 if (res == NULL) {
2353                                                         /* could not lower because predecessors not ready */
2354                                                         waitq_put(lenv->waitq, node);
2355                                                         return;
2356                                                 }  /* if */
2357                                                 set_irn_n(node, i, res);
2358                                         }  /* if */
2359                                 }  /* if */
2360                         }  /* if */
2361                 }  /* for */
2362         }  /* if */
2363
2364         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2365         if (entry || always_lower(get_irn_opcode(node))) {
2366                 ir_op      *op = get_irn_op(node);
2367                 lower_func func = (lower_func)op->ops.generic;
2368
2369                 if (func) {
2370                         mode = get_irn_op_mode(node);
2371
2372                         if (mode == lenv->params->high_signed)
2373                                 mode = lenv->params->low_signed;
2374                         else
2375                                 mode = lenv->params->low_unsigned;
2376
2377                         DB((dbg, LEVEL_1, "  %+F\n", node));
2378                         func(node, mode, lenv);
2379                 }  /* if */
2380         }  /* if */
2381 }  /* lower_ops */
2382
2383 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2384
2385 /**
2386  * Compare two op_mode_entry_t's.
2387  */
2388 static int cmp_op_mode(const void *elt, const void *key, size_t size) {
2389         const op_mode_entry_t *e1 = elt;
2390         const op_mode_entry_t *e2 = key;
2391         (void) size;
2392
2393         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2394 }  /* cmp_op_mode */
2395
2396 /**
2397  * Compare two conv_tp_entry_t's.
2398  */
2399 static int cmp_conv_tp(const void *elt, const void *key, size_t size) {
2400         const conv_tp_entry_t *e1 = elt;
2401         const conv_tp_entry_t *e2 = key;
2402         (void) size;
2403
2404         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2405 }  /* static int cmp_conv_tp */
2406
2407 /**
2408  * Enter a lowering function into an ir_op.
2409  */
2410 static void enter_lower_func(ir_op *op, lower_func func) {
2411         op->ops.generic = (op_func)func;
2412 }
2413
2414 /*
2415  * Do the lowering.
2416  */
2417 void lower_dw_ops(const lwrdw_param_t *param)
2418 {
2419         lower_env_t lenv;
2420         int i;
2421         ir_graph *rem;
2422
2423         if (! param)
2424                 return;
2425
2426         if (! param->enable)
2427                 return;
2428
2429         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2430
2431         assert(2 * get_mode_size_bits(param->low_signed)   == get_mode_size_bits(param->high_signed));
2432         assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
2433         assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
2434
2435         /* create the necessary maps */
2436         if (! prim_types)
2437                 prim_types = pmap_create();
2438         if (! intrinsic_fkt)
2439                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2440         if (! conv_types)
2441                 conv_types = new_set(cmp_conv_tp, 16);
2442         if (! lowered_type)
2443                 lowered_type = pmap_create();
2444
2445         /* create a primitive unsigned and signed type */
2446         if (! tp_u)
2447                 tp_u = get_primitive_type(param->low_unsigned);
2448         if (! tp_s)
2449                 tp_s = get_primitive_type(param->low_signed);
2450
2451         /* create method types for the created binop calls */
2452         if (! binop_tp_u) {
2453                 binop_tp_u = new_type_method(IDENT("binop_u_intrinsic"), 4, 2);
2454                 set_method_param_type(binop_tp_u, 0, tp_u);
2455                 set_method_param_type(binop_tp_u, 1, tp_u);
2456                 set_method_param_type(binop_tp_u, 2, tp_u);
2457                 set_method_param_type(binop_tp_u, 3, tp_u);
2458                 set_method_res_type(binop_tp_u, 0, tp_u);
2459                 set_method_res_type(binop_tp_u, 1, tp_u);
2460         }  /* if */
2461         if (! binop_tp_s) {
2462                 binop_tp_s = new_type_method(IDENT("binop_s_intrinsic"), 4, 2);
2463                 set_method_param_type(binop_tp_s, 0, tp_u);
2464                 set_method_param_type(binop_tp_s, 1, tp_s);
2465                 set_method_param_type(binop_tp_s, 2, tp_u);
2466                 set_method_param_type(binop_tp_s, 3, tp_s);
2467                 set_method_res_type(binop_tp_s, 0, tp_u);
2468                 set_method_res_type(binop_tp_s, 1, tp_s);
2469         }  /* if */
2470         if (! shiftop_tp_u) {
2471                 shiftop_tp_u = new_type_method(IDENT("shiftop_u_intrinsic"), 3, 2);
2472                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2473                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2474                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2475                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2476                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2477         }  /* if */
2478         if (! shiftop_tp_s) {
2479                 shiftop_tp_s = new_type_method(IDENT("shiftop_s_intrinsic"), 3, 2);
2480                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2481                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2482                 /* beware: shift count is always mode_Iu */
2483                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2484                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2485                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2486         }  /* if */
2487         if (! unop_tp_u) {
2488                 unop_tp_u = new_type_method(IDENT("unop_u_intrinsic"), 2, 2);
2489                 set_method_param_type(unop_tp_u, 0, tp_u);
2490                 set_method_param_type(unop_tp_u, 1, tp_u);
2491                 set_method_res_type(unop_tp_u, 0, tp_u);
2492                 set_method_res_type(unop_tp_u, 1, tp_u);
2493         }  /* if */
2494         if (! unop_tp_s) {
2495                 unop_tp_s = new_type_method(IDENT("unop_s_intrinsic"), 2, 2);
2496                 set_method_param_type(unop_tp_s, 0, tp_u);
2497                 set_method_param_type(unop_tp_s, 1, tp_s);
2498                 set_method_res_type(unop_tp_s, 0, tp_u);
2499                 set_method_res_type(unop_tp_s, 1, tp_s);
2500         }  /* if */
2501
2502         lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), mode_Iu);
2503         lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), mode_Iu);
2504         lenv.waitq         = new_pdeq();
2505         lenv.params        = param;
2506
2507         /* first clear the generic function pointer for all ops */
2508         clear_irp_opcodes_generic_func();
2509
2510 #define LOWER2(op, fkt)   enter_lower_func(op_##op, fkt)
2511 #define LOWER(op)         LOWER2(op, lower_##op)
2512 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2513 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2514
2515         /* the table of all operations that must be lowered follows */
2516         LOWER(ASM);
2517         LOWER(Load);
2518         LOWER(Store);
2519         LOWER(Const);
2520         LOWER(And);
2521         LOWER(Or);
2522         LOWER(Eor);
2523         LOWER(Not);
2524         LOWER(Cond);
2525         LOWER(Return);
2526         LOWER(Call);
2527         LOWER(Unknown);
2528         LOWER(Phi);
2529         LOWER(Mux);
2530         LOWER(Start);
2531
2532         LOWER_BIN(Add);
2533         LOWER_BIN(Sub);
2534         LOWER_BIN(Mul);
2535         LOWER(Shl);
2536         LOWER(Shr);
2537         LOWER(Shrs);
2538         LOWER(Rotl);
2539         LOWER(DivMod);
2540         LOWER(Div);
2541         LOWER(Mod);
2542         LOWER_UN(Abs);
2543         LOWER_UN(Minus);
2544
2545         LOWER(Conv);
2546
2547 #undef LOWER_UN
2548 #undef LOWER_BIN
2549 #undef LOWER
2550 #undef LOWER2
2551
2552         /* transform all graphs */
2553         rem = current_ir_graph;
2554         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2555                 ir_graph *irg = get_irp_irg(i);
2556                 int n_idx;
2557
2558                 obstack_init(&lenv.obst);
2559
2560                 n_idx = get_irg_last_idx(irg);
2561                 n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2562                 lenv.n_entries = n_idx;
2563                 lenv.entries   = NEW_ARR_F(node_entry_t *, n_idx);
2564                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2565
2566                 /* first step: link all nodes and allocate data */
2567                 lenv.flags = 0;
2568                 lenv.proj_2_block = pmap_create();
2569                 irg_walk_graph(irg, firm_clear_link, prepare_links_and_handle_rotl, &lenv);
2570
2571                 if (lenv.flags & MUST_BE_LOWERED) {
2572                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2573
2574                         /* must do some work */
2575                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2576
2577                         /* last step: all waiting nodes */
2578                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2579                         current_ir_graph = irg;
2580                         while (! pdeq_empty(lenv.waitq)) {
2581                                 ir_node *node = pdeq_getl(lenv.waitq);
2582
2583                                 lower_ops(node, &lenv);
2584                         }  /* while */
2585
2586                         /* outs are invalid, we changed the graph */
2587                         set_irg_outs_inconsistent(irg);
2588
2589                         if (lenv.flags & CF_CHANGED) {
2590                                 /* control flow changed, dominance info is invalid */
2591                                 set_irg_doms_inconsistent(irg);
2592                                 set_irg_extblk_inconsistent(irg);
2593                                 set_irg_loopinfo_inconsistent(irg);
2594                         }  /* if */
2595                 }  /* if */
2596                 pmap_destroy(lenv.proj_2_block);
2597                 DEL_ARR_F(lenv.entries);
2598                 obstack_free(&lenv.obst, NULL);
2599         }  /* for */
2600         del_pdeq(lenv.waitq);
2601         current_ir_graph = rem;
2602 }  /* lower_dw_ops */
2603
2604 /* Default implementation. */
2605 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2606                                     const ir_mode *imode, const ir_mode *omode,
2607                                     void *context)
2608 {
2609         char buf[64];
2610         ident *id;
2611         ir_entity *ent;
2612         (void) context;
2613
2614         if (imode == omode) {
2615                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2616         } else {
2617                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2618                         get_mode_name(imode), get_mode_name(omode));
2619         }  /* if */
2620         id = new_id_from_str(buf);
2621
2622         ent = new_entity(get_glob_type(), id, method);
2623         set_entity_ld_ident(ent, get_entity_ident(ent));
2624         set_entity_visibility(ent, visibility_external_allocated);
2625         return ent;
2626 }  /* def_create_intrinsic_fkt */