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         int      idx;
 345         ir_graph *irg = current_ir_graph;
 346         ir_mode  *low_mode = env->params->low_unsigned;
 347
 348         tv   = get_Const_tarval(node);
 349
 350         tv_l = tarval_convert_to(tv, low_mode);
 351         low  = new_rd_Const(dbg, irg, low_mode, tv_l);
 352
 353         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 354         high = new_rd_Const(dbg, irg, mode, tv_h);
 355
 356         idx = get_irn_idx(node);
 357         assert(idx < env->n_entries);
 358         env->entries[idx]->low_word  = low;
 359         env->entries[idx]->high_word = high;
 360 }  /* lower_Const */
 361
 362 /**
 363  * Translate a Load: create two.
 364  */
 365 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env) {
 366         ir_mode  *low_mode = env->params->low_unsigned;
 367         ir_graph *irg = current_ir_graph;
 368         ir_node  *adr = get_Load_ptr(node);
 369         ir_node  *mem = get_Load_mem(node);
 370         ir_node  *low, *high, *proj;
 371         dbg_info *dbg;
 372         ir_node  *block = get_nodes_block(node);
 373         int      idx;
 374
 375         if (env->params->little_endian) {
 376                 low  = adr;
 377                 high = new_r_Add(irg, block, adr,
 378                         new_r_Const(irg, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 379                         get_irn_mode(adr));
 380         } else {
 381                 low  = new_r_Add(irg, block, adr,
 382                         new_r_Const(irg, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 383                         get_irn_mode(adr));
 384                 high = adr;
 385         }  /* if */
 386
 387         /* create two loads */
 388         dbg  = get_irn_dbg_info(node);
 389         low  = new_rd_Load(dbg, irg, block, mem,  low,  low_mode);
 390         proj = new_r_Proj(irg, block, low, mode_M, pn_Load_M);
 391         high = new_rd_Load(dbg, irg, block, proj, high, mode);
 392
 393         set_Load_volatility(low,  get_Load_volatility(node));
 394         set_Load_volatility(high, get_Load_volatility(node));
 395
 396         idx = get_irn_idx(node);
 397         assert(idx < env->n_entries);
 398         env->entries[idx]->low_word  = low;
 399         env->entries[idx]->high_word = high;
 400
 401         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 402                 idx = get_irn_idx(proj);
 403
 404                 switch (get_Proj_proj(proj)) {
 405                 case pn_Load_M:         /* Memory result. */
 406                         /* put it to the second one */
 407                         set_Proj_pred(proj, high);
 408                         break;
 409                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 410                         /* put it to the first one */
 411                         set_Proj_pred(proj, low);
 412                         break;
 413                 case pn_Load_res:       /* Result of load operation. */
 414                         assert(idx < env->n_entries);
 415                         env->entries[idx]->low_word  = new_r_Proj(irg, block, low,  low_mode, pn_Load_res);
 416                         env->entries[idx]->high_word = new_r_Proj(irg, block, high, mode,     pn_Load_res);
 417                         break;
 418                 default:
 419                         assert(0 && "unexpected Proj number");
 420                 }  /* switch */
 421                 /* mark this proj: we have handled it already, otherwise we might fall into
 422                  * out new nodes. */
 423                 mark_irn_visited(proj);
 424         }  /* for */
 425 }  /* lower_Load */
 426
 427 /**
 428  * Translate a Store: create two.
 429  */
 430 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env) {
 431         ir_graph *irg;
 432         ir_node  *block, *adr, *mem;
 433         ir_node  *low, *high, *irn, *proj;
 434         dbg_info *dbg;
 435         int      idx;
 436         node_entry_t *entry;
 437         (void) node;
 438         (void) mode;
 439
 440         irn = get_Store_value(node);
 441         entry = env->entries[get_irn_idx(irn)];
 442         assert(entry);
 443
 444         if (! entry->low_word) {
 445                 /* not ready yet, wait */
 446                 pdeq_putr(env->waitq, node);
 447                 return;
 448         }  /* if */
 449
 450         irg = current_ir_graph;
 451         adr = get_Store_ptr(node);
 452         mem = get_Store_mem(node);
 453         block = get_nodes_block(node);
 454
 455         if (env->params->little_endian) {
 456                 low  = adr;
 457                 high = new_r_Add(irg, block, adr,
 458                         new_r_Const(irg, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 459                         get_irn_mode(adr));
 460         } else {
 461                 low  = new_r_Add(irg, block, adr,
 462                         new_r_Const(irg, get_tarval_mode(env->tv_mode_bytes), env->tv_mode_bytes),
 463                         get_irn_mode(adr));
 464                 high = adr;
 465         }  /* if */
 466
 467         /* create two Stores */
 468         dbg = get_irn_dbg_info(node);
 469         low  = new_rd_Store(dbg, irg, block, mem, low,  entry->low_word);
 470         proj = new_r_Proj(irg, block, low, mode_M, pn_Store_M);
 471         high = new_rd_Store(dbg, irg, block, proj, high, entry->high_word);
 472
 473         set_Store_volatility(low,  get_Store_volatility(node));
 474         set_Store_volatility(high, get_Store_volatility(node));
 475
 476         idx = get_irn_idx(node);
 477         assert(idx < env->n_entries);
 478         env->entries[idx]->low_word  = low;
 479         env->entries[idx]->high_word = high;
 480
 481         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 482                 idx = get_irn_idx(proj);
 483
 484                 switch (get_Proj_proj(proj)) {
 485                 case pn_Store_M:         /* Memory result. */
 486                         /* put it to the second one */
 487                         set_Proj_pred(proj, high);
 488                         break;
 489                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 490                         /* put it to the first one */
 491                         set_Proj_pred(proj, low);
 492                         break;
 493                 default:
 494                         assert(0 && "unexpected Proj number");
 495                 }  /* switch */
 496                 /* mark this proj: we have handled it already, otherwise we might fall into
 497                  * out new nodes. */
 498                 mark_irn_visited(proj);
 499         }  /* for */
 500 }  /* lower_Store */
 501
 502 /**
 503  * Return a node containing the address of the intrinsic emulation function.
 504  *
 505  * @param method  the method type of the emulation function
 506  * @param op      the emulated ir_op
 507  * @param imode   the input mode of the emulated opcode
 508  * @param omode   the output mode of the emulated opcode
 509  * @param block   where the new mode is created
 510  * @param env     the lower environment
 511  */
 512 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 513                                       ir_mode *imode, ir_mode *omode,
 514                                       ir_node *block, lower_env_t *env) {
 515         symconst_symbol sym;
 516         ir_entity *ent;
 517         op_mode_entry_t key, *entry;
 518
 519         key.op    = op;
 520         key.imode = imode;
 521         key.omode = omode;
 522         key.ent   = NULL;
 523
 524         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 525                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 526         if (! entry->ent) {
 527                 /* create a new one */
 528                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 529
 530                 assert(ent && "Intrinsic creator must return an entity");
 531                 entry->ent = ent;
 532         } else {
 533                 ent = entry->ent;
 534         }  /* if */
 535         sym.entity_p = ent;
 536         return new_r_SymConst(current_ir_graph, block, mode_P_code, sym, symconst_addr_ent);
 537 }  /* get_intrinsic_address */
 538
 539 /**
 540  * Translate a Div.
 541  *
 542  * Create an intrinsic Call.
 543  */
 544 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env) {
 545         ir_node  *block, *irn, *call, *proj;
 546         ir_node  *in[4];
 547         ir_mode  *opmode;
 548         dbg_info *dbg;
 549         ir_type  *mtp;
 550         int      idx;
 551         ir_graph *irg;
 552         node_entry_t *entry;
 553
 554         irn   = get_Div_left(node);
 555         entry = env->entries[get_irn_idx(irn)];
 556         assert(entry);
 557
 558         if (! entry->low_word) {
 559                 /* not ready yet, wait */
 560                 pdeq_putr(env->waitq, node);
 561                 return;
 562         }  /* if */
 563
 564         in[0] = entry->low_word;
 565         in[1] = entry->high_word;
 566
 567         irn   = get_Div_right(node);
 568         entry = env->entries[get_irn_idx(irn)];
 569         assert(entry);
 570
 571         if (! entry->low_word) {
 572                 /* not ready yet, wait */
 573                 pdeq_putr(env->waitq, node);
 574                 return;
 575         }  /* if */
 576
 577         in[2] = entry->low_word;
 578         in[3] = entry->high_word;
 579
 580         dbg   = get_irn_dbg_info(node);
 581         block = get_nodes_block(node);
 582         irg   = current_ir_graph;
 583
 584         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 585         opmode = get_irn_op_mode(node);
 586         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, block, env);
 587         call = new_rd_Call(dbg, irg, block, get_Div_mem(node),
 588                 irn, 4, in, mtp);
 589         set_irn_pinned(call, get_irn_pinned(node));
 590         irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 591
 592         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 593                 switch (get_Proj_proj(proj)) {
 594                 case pn_Div_M:         /* Memory result. */
 595                         /* reroute to the call */
 596                         set_Proj_pred(proj, call);
 597                         set_Proj_proj(proj, pn_Call_M_except);
 598                         break;
 599                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 600                         /* reroute to the call */
 601                         set_Proj_pred(proj, call);
 602                         set_Proj_proj(proj, pn_Call_X_except);
 603                         break;
 604                 case pn_Div_res:       /* Result of computation. */
 605                         idx = get_irn_idx(proj);
 606                         assert(idx < env->n_entries);
 607                         env->entries[idx]->low_word  = new_r_Proj(current_ir_graph, block, irn, env->params->low_unsigned, 0);
 608                         env->entries[idx]->high_word = new_r_Proj(current_ir_graph, block, irn, mode,                      1);
 609                         break;
 610                 default:
 611                         assert(0 && "unexpected Proj number");
 612                 }  /* switch */
 613                 /* mark this proj: we have handled it already, otherwise we might fall into
 614                  * out new nodes. */
 615                 mark_irn_visited(proj);
 616         }  /* for */
 617 }  /* lower_Div */
 618
 619 /**
 620  * Translate a Mod.
 621  *
 622  * Create an intrinsic Call.
 623  */
 624 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 625         ir_node  *block, *proj, *irn, *call;
 626         ir_node  *in[4];
 627         ir_mode  *opmode;
 628         dbg_info *dbg;
 629         ir_type  *mtp;
 630         int      idx;
 631         ir_graph *irg;
 632         node_entry_t *entry;
 633
 634         irn   = get_Mod_left(node);
 635         entry = env->entries[get_irn_idx(irn)];
 636         assert(entry);
 637
 638         if (! entry->low_word) {
 639                 /* not ready yet, wait */
 640                 pdeq_putr(env->waitq, node);
 641                 return;
 642         }  /* if */
 643
 644         in[0] = entry->low_word;
 645         in[1] = entry->high_word;
 646
 647         irn   = get_Mod_right(node);
 648         entry = env->entries[get_irn_idx(irn)];
 649         assert(entry);
 650
 651         if (! entry->low_word) {
 652                 /* not ready yet, wait */
 653                 pdeq_putr(env->waitq, node);
 654                 return;
 655         }  /* if */
 656
 657         in[2] = entry->low_word;
 658         in[3] = entry->high_word;
 659
 660         dbg   = get_irn_dbg_info(node);
 661         block = get_nodes_block(node);
 662         irg   = current_ir_graph;
 663
 664         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 665         opmode = get_irn_op_mode(node);
 666         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, block, env);
 667         call = new_rd_Call(dbg, irg, block, get_Mod_mem(node),
 668                 irn, 4, in, mtp);
 669         set_irn_pinned(call, get_irn_pinned(node));
 670         irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
 671
 672         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 673                 switch (get_Proj_proj(proj)) {
 674                 case pn_Mod_M:         /* Memory result. */
 675                         /* reroute to the call */
 676                         set_Proj_pred(proj, call);
 677                         set_Proj_proj(proj, pn_Call_M_except);
 678                         break;
 679                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 680                         /* reroute to the call */
 681                         set_Proj_pred(proj, call);
 682                         set_Proj_proj(proj, pn_Call_X_except);
 683                         break;
 684                 case pn_Mod_res:       /* Result of computation. */
 685                         idx = get_irn_idx(proj);
 686                         assert(idx < env->n_entries);
 687                         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
 688                         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
 689                         break;
 690                 default:
 691                         assert(0 && "unexpected Proj number");
 692                 }  /* switch */
 693                 /* mark this proj: we have handled it already, otherwise we might fall into
 694                  * out new nodes. */
 695                 mark_irn_visited(proj);
 696         }  /* for */
 697 }  /* lower_Mod */
 698
 699 /**
 700  * Translate a DivMod.
 701  *
 702  * Create two intrinsic Calls.
 703  */
 704 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env) {
 705         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod;
 706         ir_node  *resDiv = NULL;
 707         ir_node  *resMod = NULL;
 708         ir_node  *in[4];
 709         ir_mode  *opmode;
 710         dbg_info *dbg;
 711         ir_type  *mtp;
 712         int      idx;
 713         node_entry_t *entry;
 714         unsigned flags = 0;
 715         ir_graph *irg;
 716
 717         /* check if both results are needed */
 718         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 719                 switch (get_Proj_proj(proj)) {
 720                 case pn_DivMod_res_div: flags |= 1; break;
 721                 case pn_DivMod_res_mod: flags |= 2; break;
 722                 default: break;
 723                 }  /* switch */
 724         }  /* for */
 725
 726         irn   = get_DivMod_left(node);
 727         entry = env->entries[get_irn_idx(irn)];
 728         assert(entry);
 729
 730         if (! entry->low_word) {
 731                 /* not ready yet, wait */
 732                 pdeq_putr(env->waitq, node);
 733                 return;
 734         }  /* if */
 735
 736         in[0] = entry->low_word;
 737         in[1] = entry->high_word;
 738
 739         irn   = get_DivMod_right(node);
 740         entry = env->entries[get_irn_idx(irn)];
 741         assert(entry);
 742
 743         if (! entry->low_word) {
 744                 /* not ready yet, wait */
 745                 pdeq_putr(env->waitq, node);
 746                 return;
 747         }  /* if */
 748
 749         in[2] = entry->low_word;
 750         in[3] = entry->high_word;
 751
 752         dbg   = get_irn_dbg_info(node);
 753         block = get_nodes_block(node);
 754         irg   = current_ir_graph;
 755
 756         mem = get_DivMod_mem(node);
 757
 758         callDiv = callMod = NULL;
 759         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 760         if (flags & 1) {
 761                 opmode = get_irn_op_mode(node);
 762                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, block, env);
 763                 callDiv = new_rd_Call(dbg, irg, block, mem,
 764                         irn, 4, in, mtp);
 765                 set_irn_pinned(callDiv, get_irn_pinned(node));
 766                 resDiv = new_r_Proj(irg, block, callDiv, mode_T, pn_Call_T_result);
 767         }  /* if */
 768         if (flags & 2) {
 769                 if (flags & 1)
 770                         mem = new_r_Proj(irg, block, callDiv, mode_M, pn_Call_M);
 771                 opmode = get_irn_op_mode(node);
 772                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, block, env);
 773                 callMod = new_rd_Call(dbg, irg, block, mem,
 774                         irn, 4, in, mtp);
 775                 set_irn_pinned(callMod, get_irn_pinned(node));
 776                 resMod = new_r_Proj(irg, block, callMod, mode_T, pn_Call_T_result);
 777         }  /* if */
 778
 779         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 780                 switch (get_Proj_proj(proj)) {
 781                 case pn_DivMod_M:         /* Memory result. */
 782                         /* reroute to the first call */
 783                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 784                         set_Proj_proj(proj, pn_Call_M_except);
 785                         break;
 786                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 787                         /* reroute to the first call */
 788                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 789                         set_Proj_proj(proj, pn_Call_X_except);
 790                         break;
 791                 case pn_DivMod_res_div:   /* Result of Div. */
 792                         idx = get_irn_idx(proj);
 793                         assert(idx < env->n_entries);
 794                         env->entries[idx]->low_word  = new_r_Proj(irg, block, resDiv, env->params->low_unsigned, 0);
 795                         env->entries[idx]->high_word = new_r_Proj(irg, block, resDiv, mode,                      1);
 796                         break;
 797                 case pn_DivMod_res_mod:   /* Result of Mod. */
 798                         idx = get_irn_idx(proj);
 799                         env->entries[idx]->low_word  = new_r_Proj(irg, block, resMod, env->params->low_unsigned, 0);
 800                         env->entries[idx]->high_word = new_r_Proj(irg, block, resMod, mode,                      1);
 801                         break;
 802                 default:
 803                         assert(0 && "unexpected Proj number");
 804                 }  /* switch */
 805                 /* mark this proj: we have handled it already, otherwise we might fall into
 806                  * out new nodes. */
 807                 mark_irn_visited(proj);
 808         }  /* for */
 809 }  /* lower_DivMod */
 810
 811 /**
 812  * Translate a Binop.
 813  *
 814  * Create an intrinsic Call.
 815  */
 816 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 817         ir_node  *block, *irn;
 818         ir_node  *in[4];
 819         dbg_info *dbg;
 820         ir_type  *mtp;
 821         int      idx;
 822         ir_graph *irg;
 823         node_entry_t *entry;
 824
 825         irn   = get_binop_left(node);
 826         entry = env->entries[get_irn_idx(irn)];
 827         assert(entry);
 828
 829         if (! entry->low_word) {
 830                 /* not ready yet, wait */
 831                 pdeq_putr(env->waitq, node);
 832                 return;
 833         }  /* if */
 834
 835         in[0] = entry->low_word;
 836         in[1] = entry->high_word;
 837
 838         irn   = get_binop_right(node);
 839         entry = env->entries[get_irn_idx(irn)];
 840         assert(entry);
 841
 842         if (! entry->low_word) {
 843                 /* not ready yet, wait */
 844                 pdeq_putr(env->waitq, node);
 845                 return;
 846         }  /* if */
 847
 848         in[2] = entry->low_word;
 849         in[3] = entry->high_word;
 850
 851         dbg   = get_irn_dbg_info(node);
 852         block = get_nodes_block(node);
 853         irg   = current_ir_graph;
 854
 855         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 856         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
 857         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
 858                 irn, 4, in, mtp);
 859         set_irn_pinned(irn, get_irn_pinned(node));
 860         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
 861
 862         idx = get_irn_idx(node);
 863         assert(idx < env->n_entries);
 864         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
 865         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
 866 }  /* lower_Binop */
 867
 868 /**
 869  * Translate a Shiftop.
 870  *
 871  * Create an intrinsic Call.
 872  */
 873 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env) {
 874         ir_node  *block, *irn;
 875         ir_node  *in[3];
 876         dbg_info *dbg;
 877         ir_type  *mtp;
 878         int      idx;
 879         ir_graph *irg;
 880         node_entry_t *entry;
 881
 882         irn   = get_binop_left(node);
 883         entry = env->entries[get_irn_idx(irn)];
 884         assert(entry);
 885
 886         if (! entry->low_word) {
 887                 /* not ready yet, wait */
 888                 pdeq_putr(env->waitq, node);
 889                 return;
 890         }  /* if */
 891
 892         in[0] = entry->low_word;
 893         in[1] = entry->high_word;
 894
 895         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 896         in[2] = get_binop_right(node);
 897
 898         dbg   = get_irn_dbg_info(node);
 899         block = get_nodes_block(node);
 900         irg  = current_ir_graph;
 901
 902         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 903         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
 904         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
 905                 irn, 3, in, mtp);
 906         set_irn_pinned(irn, get_irn_pinned(node));
 907         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
 908
 909         idx = get_irn_idx(node);
 910         assert(idx < env->n_entries);
 911         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
 912         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
 913 }  /* lower_Shiftop */
 914
 915 /**
 916  * Translate a Shr and handle special cases.
 917  */
 918 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env) {
 919         ir_node  *right = get_Shr_right(node);
 920         ir_graph *irg = current_ir_graph;
 921
 922         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 923                 tarval *tv = get_Const_tarval(right);
 924
 925                 if (tarval_is_long(tv) &&
 926                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 927                         ir_node *block = get_nodes_block(node);
 928                         ir_node *left = get_Shr_left(node);
 929                         ir_node *c;
 930                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 931                         int idx = get_irn_idx(left);
 932
 933                         left = env->entries[idx]->high_word;
 934                         idx = get_irn_idx(node);
 935
 936                         if (shf_cnt > 0) {
 937                                 c = new_r_Const_long(irg, env->params->low_unsigned, shf_cnt);
 938                                 env->entries[idx]->low_word = new_r_Shr(irg, block, left, c, mode);
 939                         } else {
 940                                 env->entries[idx]->low_word = left;
 941                         }  /* if */
 942                         env->entries[idx]->high_word = new_r_Const(irg, mode, get_mode_null(mode));
 943
 944                         return;
 945                 }  /* if */
 946         }  /* if */
 947         lower_Shiftop(node, mode, env);
 948 }  /* lower_Shr */
 949
 950 /**
 951  * Translate a Shl and handle special cases.
 952  */
 953 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env) {
 954         ir_node  *right = get_Shl_right(node);
 955         ir_graph *irg = current_ir_graph;
 956
 957         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 958                 tarval *tv = get_Const_tarval(right);
 959
 960                 if (tarval_is_long(tv) &&
 961                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 962                         ir_mode *mode_l;
 963                         ir_node *block = get_nodes_block(node);
 964                         ir_node *left = get_Shl_left(node);
 965                         ir_node *c;
 966                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 967                         int idx = get_irn_idx(left);
 968
 969                         left = new_r_Conv(irg, block, env->entries[idx]->low_word, mode);
 970                         idx = get_irn_idx(node);
 971
 972                         mode_l = env->params->low_unsigned;
 973                         if (shf_cnt > 0) {
 974                                 c = new_r_Const_long(irg, mode_l, 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                         env->entries[idx]->low_word  = new_r_Const(irg, mode_l, get_mode_null(mode_l));
 980
 981                         return;
 982                 }  /* if */
 983         }  /* if */
 984         lower_Shiftop(node, mode, env);
 985 }  /* lower_Shl */
 986
 987 /**
 988  * Translate a Shrs and handle special cases.
 989  */
 990 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env) {
 991         ir_node  *right = get_Shrs_right(node);
 992         ir_graph *irg = current_ir_graph;
 993
 994         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 995                 tarval *tv = get_Const_tarval(right);
 996
 997                 if (tarval_is_long(tv) &&
 998                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 999                         ir_node *block   = get_nodes_block(node);
1000                         ir_node *left    = get_Shrs_left(node);
1001                         long     shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
1002                         int      idx     = get_irn_idx(left);
1003                         ir_mode *mode_l;
1004                         ir_node *low;
1005                         ir_node *c;
1006
1007                         left = env->entries[idx]->high_word;
1008                         idx = get_irn_idx(node);
1009
1010                         mode_l = env->params->low_unsigned;
1011                         if (shf_cnt > 0) {
1012                                 c   = new_r_Const_long(irg, mode_l, shf_cnt);
1013                                 low = new_r_Shrs(irg, block, left, c, mode);
1014                         } else {
1015                                 low = left;
1016                         }  /* if */
1017                         /* low word is expected to have mode_l */
1018                         env->entries[idx]->low_word = new_r_Conv(irg, block, low, mode_l);
1019
1020                         c = new_r_Const_long(irg, mode_l, get_mode_size_bits(mode) - 1);
1021                         env->entries[idx]->high_word = new_r_Shrs(irg, block, left, c, mode);
1022
1023                         return;
1024                 }  /* if */
1025         }  /* if */
1026         lower_Shiftop(node, mode, env);
1027 }  /* lower_Shrs */
1028
1029 /**
1030  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1031  */
1032 static void prepare_links_and_handle_rotl(ir_node *node, void *env) {
1033         lower_env_t *lenv = env;
1034
1035         if (is_Rotl(node)) {
1036                 ir_mode *mode = get_irn_op_mode(node);
1037                         if (mode == lenv->params->high_signed ||
1038                             mode == lenv->params->high_unsigned) {
1039                                 ir_node  *right = get_Rotl_right(node);
1040                                 ir_node  *left, *shl, *shr, *or, *block, *sub, *c;
1041                                 ir_mode  *omode, *rmode;
1042                                 ir_graph *irg;
1043                                 dbg_info *dbg;
1044                                 optimization_state_t state;
1045
1046                                 if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1047                                         tarval *tv = get_Const_tarval(right);
1048
1049                                         if (tarval_is_long(tv) &&
1050                                             get_tarval_long(tv) == (long)get_mode_size_bits(mode)) {
1051                                                 /* will be optimized in lower_Rotl() */
1052                                                 return;
1053                                         }
1054                                 }
1055
1056                                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) and lower those */
1057                                 dbg   = get_irn_dbg_info(node);
1058                                 omode = get_irn_mode(node);
1059                                 left  = get_Rotl_left(node);
1060                                 irg   = current_ir_graph;
1061                                 block = get_nodes_block(node);
1062                                 shl   = new_rd_Shl(dbg, irg, block, left, right, omode);
1063                                 rmode = get_irn_mode(right);
1064                                 c     = new_Const_long(rmode, get_mode_size_bits(omode));
1065                                 sub   = new_rd_Sub(dbg, irg, block, c, right, rmode);
1066                                 shr   = new_rd_Shr(dbg, irg, block, left, sub, omode);
1067
1068                                 /* optimization must be switched off here, or we will get the Rotl back */
1069                                 save_optimization_state(&state);
1070                                 set_opt_algebraic_simplification(0);
1071                                 or = new_rd_Or(dbg, irg, block, shl, shr, omode);
1072                                 restore_optimization_state(&state);
1073
1074                                 exchange(node, or);
1075
1076                                 /* do lowering on the new nodes */
1077                                 prepare_links(shl, env);
1078                                 prepare_links(c, env);
1079                                 prepare_links(sub, env);
1080                                 prepare_links(shr, env);
1081                                 prepare_links(or, env);
1082                         }
1083         } else {
1084                 prepare_links(node, env);
1085         }
1086 }
1087
1088 /**
1089  * Translate a special case Rotl(x, sizeof(w)).
1090  */
1091 static void lower_Rotl(ir_node *node, ir_mode *mode, lower_env_t *env) {
1092         ir_node *right = get_Rotl_right(node);
1093         ir_node *left = get_Rotl_left(node);
1094         ir_node *h, *l;
1095         int idx = get_irn_idx(left);
1096         (void) right;
1097         (void) mode;
1098
1099         assert(get_mode_arithmetic(mode) == irma_twos_complement &&
1100                is_Const(right) && tarval_is_long(get_Const_tarval(right)) &&
1101                get_tarval_long(get_Const_tarval(right)) == (long)get_mode_size_bits(mode));
1102
1103         l = env->entries[idx]->low_word;
1104         h = env->entries[idx]->high_word;
1105         idx = get_irn_idx(node);
1106
1107         env->entries[idx]->low_word  = h;
1108         env->entries[idx]->high_word = l;
1109 }  /* lower_Rotl */
1110
1111 /**
1112  * Translate an Unop.
1113  *
1114  * Create an intrinsic Call.
1115  */
1116 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env) {
1117         ir_node  *block, *irn;
1118         ir_node  *in[2];
1119         dbg_info *dbg;
1120         ir_type  *mtp;
1121         int      idx;
1122         ir_graph *irg;
1123         node_entry_t *entry;
1124
1125         irn   = get_unop_op(node);
1126         entry = env->entries[get_irn_idx(irn)];
1127         assert(entry);
1128
1129         if (! entry->low_word) {
1130                 /* not ready yet, wait */
1131                 pdeq_putr(env->waitq, node);
1132                 return;
1133         }  /* if */
1134
1135         in[0] = entry->low_word;
1136         in[1] = entry->high_word;
1137
1138         dbg   = get_irn_dbg_info(node);
1139         block = get_nodes_block(node);
1140         irg   = current_ir_graph;
1141
1142         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1143         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, block, env);
1144         irn = new_rd_Call(dbg, irg, block, get_irg_no_mem(current_ir_graph),
1145                 irn, 2, in, mtp);
1146         set_irn_pinned(irn, get_irn_pinned(node));
1147         irn = new_r_Proj(irg, block, irn, mode_T, pn_Call_T_result);
1148
1149         idx = get_irn_idx(node);
1150         assert(idx < env->n_entries);
1151         env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, env->params->low_unsigned, 0);
1152         env->entries[idx]->high_word = new_r_Proj(irg, block, irn, mode,                      1);
1153 }  /* lower_Unop */
1154
1155 /**
1156  * Translate a logical Binop.
1157  *
1158  * Create two logical Binops.
1159  */
1160 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1161                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_graph *irg, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1162         ir_node  *block, *irn;
1163         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1164         dbg_info *dbg;
1165         int      idx;
1166         ir_graph *irg;
1167         node_entry_t *entry;
1168
1169         irn   = get_binop_left(node);
1170         entry = env->entries[get_irn_idx(irn)];
1171         assert(entry);
1172
1173         if (! entry->low_word) {
1174                 /* not ready yet, wait */
1175                 pdeq_putr(env->waitq, node);
1176                 return;
1177         }  /* if */
1178
1179         lop_l = entry->low_word;
1180         lop_h = entry->high_word;
1181
1182         irn   = get_binop_right(node);
1183         entry = env->entries[get_irn_idx(irn)];
1184         assert(entry);
1185
1186         if (! entry->low_word) {
1187                 /* not ready yet, wait */
1188                 pdeq_putr(env->waitq, node);
1189                 return;
1190         }  /* if */
1191
1192         rop_l = entry->low_word;
1193         rop_h = entry->high_word;
1194
1195         dbg = get_irn_dbg_info(node);
1196         block = get_nodes_block(node);
1197
1198         idx = get_irn_idx(node);
1199         assert(idx < env->n_entries);
1200         irg = current_ir_graph;
1201         env->entries[idx]->low_word  = constr_rd(dbg, irg, block, lop_l, rop_l, env->params->low_unsigned);
1202         env->entries[idx]->high_word = constr_rd(dbg, irg, block, lop_h, rop_h, mode);
1203 }  /* lower_Binop_logical */
1204
1205 /** create a logical operation transformation */
1206 #define lower_logical(op)                                                \
1207 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1208         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1209 }
1210
1211 lower_logical(And)
1212 lower_logical(Or)
1213 lower_logical(Eor)
1214
1215 /**
1216  * Translate a Not.
1217  *
1218  * Create two logical Nots.
1219  */
1220 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env) {
1221         ir_node  *block, *irn;
1222         ir_node  *op_l, *op_h;
1223         dbg_info *dbg;
1224         int      idx;
1225         ir_graph *irg;
1226         node_entry_t *entry;
1227
1228         irn   = get_Not_op(node);
1229         entry = env->entries[get_irn_idx(irn)];
1230         assert(entry);
1231
1232         if (! entry->low_word) {
1233                 /* not ready yet, wait */
1234                 pdeq_putr(env->waitq, node);
1235                 return;
1236         }  /* if */
1237
1238         op_l = entry->low_word;
1239         op_h = entry->high_word;
1240
1241         dbg   = get_irn_dbg_info(node);
1242         block = get_nodes_block(node);
1243         irg   = current_ir_graph;
1244
1245         idx = get_irn_idx(node);
1246         assert(idx < env->n_entries);
1247         env->entries[idx]->low_word  = new_rd_Not(dbg, current_ir_graph, block, op_l, env->params->low_unsigned);
1248         env->entries[idx]->high_word = new_rd_Not(dbg, current_ir_graph, block, op_h, mode);
1249 }  /* lower_Not */
1250
1251 /**
1252  * Translate a Cond.
1253  */
1254 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env) {
1255         ir_node *cmp, *left, *right, *block;
1256         ir_node *sel = get_Cond_selector(node);
1257         ir_mode *m = get_irn_mode(sel);
1258         int     idx;
1259         (void) mode;
1260
1261         if (m == mode_b) {
1262                 node_entry_t *lentry, *rentry;
1263                 ir_node  *proj, *projT = NULL, *projF = NULL;
1264                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1265                 ir_node  *projHF, *projHT;
1266                 ir_node  *dst_blk;
1267                 ir_graph *irg;
1268                 pn_Cmp   pnc;
1269                 dbg_info *dbg;
1270
1271                 if(!is_Proj(sel))
1272                         return;
1273
1274                 cmp   = get_Proj_pred(sel);
1275                 if(!is_Cmp(cmp))
1276                         return;
1277
1278                 left  = get_Cmp_left(cmp);
1279                 idx   = get_irn_idx(left);
1280                 lentry = env->entries[idx];
1281
1282                 if (! lentry) {
1283                         /* a normal Cmp */
1284                         return;
1285                 }  /* if */
1286
1287                 right = get_Cmp_right(cmp);
1288                 idx   = get_irn_idx(right);
1289                 rentry = env->entries[idx];
1290                 assert(rentry);
1291
1292                 if (! lentry->low_word || !rentry->low_word) {
1293                         /* not yet ready */
1294                         pdeq_putr(env->waitq, node);
1295                         return;
1296                 }  /* if */
1297
1298                 /* all right, build the code */
1299                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1300                         long proj_nr = get_Proj_proj(proj);
1301
1302                         if (proj_nr == pn_Cond_true) {
1303                                 assert(projT == NULL && "more than one Proj(true)");
1304                                 projT = proj;
1305                         } else {
1306                                 assert(proj_nr == pn_Cond_false);
1307                                 assert(projF == NULL && "more than one Proj(false)");
1308                                 projF = proj;
1309                         }  /* if */
1310                         mark_irn_visited(proj);
1311                 }  /* for */
1312                 assert(projT && projF);
1313
1314                 /* create a new high compare */
1315                 block = get_nodes_block(node);
1316                 dbg   = get_irn_dbg_info(cmp);
1317                 irg   = current_ir_graph;
1318                 pnc   = get_Proj_proj(sel);
1319
1320                 if (is_Const(right) && is_Const_null(right)) {
1321                         if (pnc == pn_Cmp_Eq || pnc == pn_Cmp_Lg) {
1322                                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1323                                 ir_mode *mode = env->params->low_unsigned;
1324                                 ir_node *low  = new_r_Conv(irg, block, lentry->low_word, mode);
1325                                 ir_node *high = new_r_Conv(irg, block, lentry->high_word, mode);
1326                                 ir_node *or   = new_rd_Or(dbg, irg, block, low, high, mode);
1327                                 ir_node *cmp  = new_rd_Cmp(dbg, irg, block, or, new_Const_long(mode, 0));
1328
1329                                 ir_node *proj = new_r_Proj(irg, block, cmp, mode_b, pnc);
1330                                 set_Cond_selector(node, proj);
1331                                 return;
1332                         }
1333                 }
1334
1335                 cmpH = new_rd_Cmp(dbg, irg, block, lentry->high_word, rentry->high_word);
1336
1337                 if (pnc == pn_Cmp_Eq) {
1338                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1339                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1340
1341                         assert(entry);
1342                         dst_blk = entry->value;
1343
1344                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Eq);
1345                         dbg = get_irn_dbg_info(node);
1346                         irn = new_rd_Cond(dbg, irg, block, irn);
1347
1348                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1349                         mark_irn_visited(projHF);
1350                         exchange(projF, projHF);
1351
1352                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1353                         mark_irn_visited(projHT);
1354
1355                         new_bl = new_r_Block(irg, 1, &projHT);
1356
1357                         dbg   = get_irn_dbg_info(cmp);
1358                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1359                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Eq);
1360                         dbg = get_irn_dbg_info(node);
1361                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1362
1363                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1364                         mark_irn_visited(proj);
1365                         add_block_cf_input(dst_blk, projHF, proj);
1366
1367                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1368                         mark_irn_visited(proj);
1369                         exchange(projT, proj);
1370                 } else if (pnc == pn_Cmp_Lg) {
1371                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1372                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1373
1374                         assert(entry);
1375                         dst_blk = entry->value;
1376
1377                         irn = new_r_Proj(irg, block, cmpH, mode_b, pn_Cmp_Lg);
1378                         dbg = get_irn_dbg_info(node);
1379                         irn = new_rd_Cond(dbg, irg, block, irn);
1380
1381                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1382                         mark_irn_visited(projHT);
1383                         exchange(projT, projHT);
1384
1385                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1386                         mark_irn_visited(projHF);
1387
1388                         new_bl = new_r_Block(irg, 1, &projHF);
1389
1390                         dbg   = get_irn_dbg_info(cmp);
1391                         cmpL = new_rd_Cmp(dbg, irg, new_bl, lentry->low_word, rentry->low_word);
1392                         irn = new_r_Proj(irg, new_bl, cmpL, mode_b, pn_Cmp_Lg);
1393                         dbg = get_irn_dbg_info(node);
1394                         irn = new_rd_Cond(dbg, irg, new_bl, irn);
1395
1396                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_true);
1397                         mark_irn_visited(proj);
1398                         add_block_cf_input(dst_blk, projHT, proj);
1399
1400                         proj = new_r_Proj(irg, new_bl, irn, mode_X, pn_Cond_false);
1401                         mark_irn_visited(proj);
1402                         exchange(projF, proj);
1403                 } else {
1404                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1405                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1406                         pmap_entry *entry;
1407
1408                         entry = pmap_find(env->proj_2_block, projT);
1409                         assert(entry);
1410                         dstT = entry->value;
1411
1412                         entry = pmap_find(env->proj_2_block, projF);
1413                         assert(entry);
1414                         dstF = entry->value;
1415
1416                         irn = new_r_Proj(irg, block, cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1417                         dbg = get_irn_dbg_info(node);
1418                         irn = new_rd_Cond(dbg, irg, block, irn);
1419
1420                         projHT = new_r_Proj(irg, block, irn, mode_X, pn_Cond_true);
1421                         mark_irn_visited(projHT);
1422                         exchange(projT, projHT);
1423                         projT = projHT;
1424
1425                         projHF = new_r_Proj(irg, block, irn, mode_X, pn_Cond_false);
1426                         mark_irn_visited(projHF);
1427
1428                         newbl_eq = new_r_Block(irg, 1, &projHF);
1429
1430                         irn = new_r_Proj(irg, newbl_eq, cmpH, mode_b, pn_Cmp_Eq);
1431                         irn = new_rd_Cond(dbg, irg, newbl_eq, irn);
1432
1433                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_false);
1434                         mark_irn_visited(proj);
1435                         exchange(projF, proj);
1436                         projF = proj;
1437
1438                         proj = new_r_Proj(irg, newbl_eq, irn, mode_X, pn_Cond_true);
1439                         mark_irn_visited(proj);
1440
1441                         newbl_l = new_r_Block(irg, 1, &proj);
1442
1443                         dbg   = get_irn_dbg_info(cmp);
1444                         cmpL = new_rd_Cmp(dbg, irg, newbl_l, lentry->low_word, rentry->low_word);
1445                         irn = new_r_Proj(irg, newbl_l, cmpL, mode_b, pnc);
1446                         dbg = get_irn_dbg_info(node);
1447                         irn = new_rd_Cond(dbg, irg, newbl_l, irn);
1448
1449                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_true);
1450                         mark_irn_visited(proj);
1451                         add_block_cf_input(dstT, projT, proj);
1452
1453                         proj = new_r_Proj(irg, newbl_l, irn, mode_X, pn_Cond_false);
1454                         mark_irn_visited(proj);
1455                         add_block_cf_input(dstF, projF, proj);
1456                 }  /* if */
1457
1458                 /* we have changed the control flow */
1459                 env->flags |= CF_CHANGED;
1460         } else {
1461                 idx = get_irn_idx(sel);
1462
1463                 if (env->entries[idx]) {
1464                         /*
1465                            Bad, a jump-table with double-word index.
1466                            This should not happen, but if it does we handle
1467                            it like a Conv were between (in other words, ignore
1468                            the high part.
1469                          */
1470
1471                         if (! env->entries[idx]->low_word) {
1472                                 /* not ready yet, wait */
1473                                 pdeq_putr(env->waitq, node);
1474                                 return;
1475                         }  /* if */
1476                         set_Cond_selector(node, env->entries[idx]->low_word);
1477                 }  /* if */
1478         }  /* if */
1479 }  /* lower_Cond */
1480
1481 /**
1482  * Translate a Conv to higher_signed
1483  */
1484 static void lower_Conv_to_Ls(ir_node *node, lower_env_t *env) {
1485         ir_node  *op    = get_Conv_op(node);
1486         ir_mode  *imode = get_irn_mode(op);
1487         ir_mode  *dst_mode_l = env->params->low_unsigned;
1488         ir_mode  *dst_mode_h = env->params->low_signed;
1489         int      idx = get_irn_idx(node);
1490         ir_graph *irg = current_ir_graph;
1491         ir_node  *block = get_nodes_block(node);
1492         dbg_info *dbg = get_irn_dbg_info(node);
1493
1494         assert(idx < env->n_entries);
1495
1496         if (mode_is_int(imode) || mode_is_reference(imode)) {
1497                 if (imode == env->params->high_unsigned) {
1498                         /* a Conv from Lu to Ls */
1499                         int op_idx = get_irn_idx(op);
1500
1501                         if (! env->entries[op_idx]->low_word) {
1502                                 /* not ready yet, wait */
1503                                 pdeq_putr(env->waitq, node);
1504                                 return;
1505                         }  /* if */
1506                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word,  dst_mode_l);
1507                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode_h);
1508                 } else {
1509                         /* simple case: create a high word */
1510                         if (imode != dst_mode_l)
1511                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode_l);
1512
1513                         env->entries[idx]->low_word  = op;
1514
1515                         if (mode_is_signed(imode)) {
1516                                 ir_node *op_conv = new_rd_Conv(dbg, irg, block, op, dst_mode_h);
1517                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op_conv,
1518                                         new_Const_long(dst_mode_l, get_mode_size_bits(dst_mode_h) - 1), dst_mode_h);
1519                         } else {
1520                                 env->entries[idx]->high_word = new_Const(dst_mode_h, get_mode_null(dst_mode_h));
1521                         }  /* if */
1522                 }  /* if */
1523         } else {
1524                 ir_node *irn, *call;
1525                 ir_mode *omode = env->params->high_signed;
1526                 ir_type *mtp = get_conv_type(imode, omode, env);
1527
1528                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1529                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1530                 set_irn_pinned(call, get_irn_pinned(node));
1531                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1532
1533                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode_l, 0);
1534                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode_h, 1);
1535         }  /* if */
1536 }  /* lower_Conv_to_Ls */
1537
1538 /**
1539  * Translate a Conv to higher_unsigned
1540  */
1541 static void lower_Conv_to_Lu(ir_node *node, lower_env_t *env) {
1542         ir_node  *op    = get_Conv_op(node);
1543         ir_mode  *imode = get_irn_mode(op);
1544         ir_mode  *dst_mode = env->params->low_unsigned;
1545         int      idx = get_irn_idx(node);
1546         ir_graph *irg = current_ir_graph;
1547         ir_node  *block = get_nodes_block(node);
1548         dbg_info *dbg = get_irn_dbg_info(node);
1549
1550         assert(idx < env->n_entries);
1551
1552         if (mode_is_int(imode) || mode_is_reference(imode)) {
1553                 if (imode == env->params->high_signed) {
1554                         /* a Conv from Ls to Lu */
1555                         int op_idx = get_irn_idx(op);
1556
1557                         if (! env->entries[op_idx]->low_word) {
1558                                 /* not ready yet, wait */
1559                                 pdeq_putr(env->waitq, node);
1560                                 return;
1561                         }  /* if */
1562                         env->entries[idx]->low_word  = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->low_word, dst_mode);
1563                         env->entries[idx]->high_word = new_rd_Conv(dbg, irg, block, env->entries[op_idx]->high_word, dst_mode);
1564                 } else {
1565                         /* simple case: create a high word */
1566                         if (imode != dst_mode)
1567                                 op = new_rd_Conv(dbg, irg, block, op, dst_mode);
1568
1569                         env->entries[idx]->low_word  = op;
1570
1571                         if (mode_is_signed(imode)) {
1572                                 env->entries[idx]->high_word = new_rd_Shrs(dbg, irg, block, op,
1573                                         new_Const_long(dst_mode, get_mode_size_bits(dst_mode) - 1), dst_mode);
1574                         } else {
1575                                 env->entries[idx]->high_word = new_Const(dst_mode, get_mode_null(dst_mode));
1576                         }  /* if */
1577                 }  /* if */
1578         } else {
1579                 ir_node *irn, *call;
1580                 ir_mode *omode = env->params->high_unsigned;
1581                 ir_type *mtp = get_conv_type(imode, omode, env);
1582
1583                 /* do an intrinsic call */
1584                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1585                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1586                 set_irn_pinned(call, get_irn_pinned(node));
1587                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1588
1589                 env->entries[idx]->low_word  = new_r_Proj(irg, block, irn, dst_mode, 0);
1590                 env->entries[idx]->high_word = new_r_Proj(irg, block, irn, dst_mode, 1);
1591         }  /* if */
1592 }  /* lower_Conv_to_Lu */
1593
1594 /**
1595  * Translate a Conv from higher_signed
1596  */
1597 static void lower_Conv_from_Ls(ir_node *node, lower_env_t *env) {
1598         ir_node  *op    = get_Conv_op(node);
1599         ir_mode  *omode = get_irn_mode(node);
1600         ir_node  *block = get_nodes_block(node);
1601         dbg_info *dbg = get_irn_dbg_info(node);
1602         int      idx = get_irn_idx(op);
1603         ir_graph *irg = current_ir_graph;
1604
1605         assert(idx < env->n_entries);
1606
1607         if (! env->entries[idx]->low_word) {
1608                 /* not ready yet, wait */
1609                 pdeq_putr(env->waitq, node);
1610                 return;
1611         }  /* if */
1612
1613         if (mode_is_int(omode) || mode_is_reference(omode)) {
1614                 op = env->entries[idx]->low_word;
1615
1616                 /* simple case: create a high word */
1617                 if (omode != env->params->low_signed)
1618                         op = new_rd_Conv(dbg, irg, block, op, omode);
1619
1620                 set_Conv_op(node, op);
1621         } else {
1622                 ir_node *irn, *call, *in[2];
1623                 ir_mode *imode = env->params->high_signed;
1624                 ir_type *mtp = get_conv_type(imode, omode, env);
1625
1626                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1627                 in[0] = env->entries[idx]->low_word;
1628                 in[1] = env->entries[idx]->high_word;
1629
1630                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1631                 set_irn_pinned(call, get_irn_pinned(node));
1632                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1633
1634                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1635         }  /* if */
1636 }  /* lower_Conv_from_Ls */
1637
1638 /**
1639  * Translate a Conv from higher_unsigned
1640  */
1641 static void lower_Conv_from_Lu(ir_node *node, lower_env_t *env) {
1642         ir_node  *op    = get_Conv_op(node);
1643         ir_mode  *omode = get_irn_mode(node);
1644         ir_node  *block = get_nodes_block(node);
1645         dbg_info *dbg = get_irn_dbg_info(node);
1646         int      idx = get_irn_idx(op);
1647         ir_graph *irg = current_ir_graph;
1648
1649         assert(idx < env->n_entries);
1650
1651         if (! env->entries[idx]->low_word) {
1652                 /* not ready yet, wait */
1653                 pdeq_putr(env->waitq, node);
1654                 return;
1655         }  /* if */
1656
1657         if (mode_is_int(omode) || mode_is_reference(omode)) {
1658                 op = env->entries[idx]->low_word;
1659
1660                 /* simple case: create a high word */
1661                 if (omode != env->params->low_unsigned)
1662                         op = new_rd_Conv(dbg, irg, block, op, omode);
1663
1664                 set_Conv_op(node, op);
1665         } else {
1666                 ir_node *irn, *call, *in[2];
1667                 ir_mode *imode = env->params->high_unsigned;
1668                 ir_type *mtp = get_conv_type(imode, omode, env);
1669
1670                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, block, env);
1671                 in[0] = env->entries[idx]->low_word;
1672                 in[1] = env->entries[idx]->high_word;
1673
1674                 call = new_rd_Call(dbg, irg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1675                 set_irn_pinned(call, get_irn_pinned(node));
1676                 irn = new_r_Proj(irg, block, call, mode_T, pn_Call_T_result);
1677
1678                 exchange(node, new_r_Proj(irg, block, irn, omode, 0));
1679         }  /* if */
1680 }  /* lower_Conv_from_Lu */
1681
1682 /**
1683  * Translate a Conv.
1684  */
1685 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env) {
1686         mode = get_irn_mode(node);
1687
1688         if (mode == env->params->high_signed) {
1689                 lower_Conv_to_Ls(node, env);
1690         } else if (mode == env->params->high_unsigned) {
1691                 lower_Conv_to_Lu(node, env);
1692         } else {
1693                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1694
1695                 if (mode == env->params->high_signed) {
1696                         lower_Conv_from_Ls(node, env);
1697                 } else if (mode == env->params->high_unsigned) {
1698                         lower_Conv_from_Lu(node, env);
1699                 }  /* if */
1700         }  /* if */
1701 }  /* lower_Conv */
1702
1703 /**
1704  * Lower the method type.
1705  */
1706 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env) {
1707         pmap_entry *entry;
1708         ident      *id;
1709         ir_type    *res;
1710
1711         if (is_lowered_type(mtp))
1712                 return mtp;
1713
1714         entry = pmap_find(lowered_type, mtp);
1715         if (! entry) {
1716                 int i, n, r, n_param, n_res;
1717
1718                 /* count new number of params */
1719                 n_param = n = get_method_n_params(mtp);
1720                 for (i = n_param - 1; i >= 0; --i) {
1721                         ir_type *tp = get_method_param_type(mtp, i);
1722
1723                         if (is_Primitive_type(tp)) {
1724                                 ir_mode *mode = get_type_mode(tp);
1725
1726                                 if (mode == env->params->high_signed ||
1727                                         mode == env->params->high_unsigned)
1728                                         ++n_param;
1729                         }  /* if */
1730                 }  /* for */
1731
1732                 /* count new number of results */
1733                 n_res = r = get_method_n_ress(mtp);
1734                 for (i = n_res - 1; i >= 0; --i) {
1735                         ir_type *tp = get_method_res_type(mtp, i);
1736
1737                         if (is_Primitive_type(tp)) {
1738                                 ir_mode *mode = get_type_mode(tp);
1739
1740                                 if (mode == env->params->high_signed ||
1741                                         mode == env->params->high_unsigned)
1742                                         ++n_res;
1743                         }  /* if */
1744                 }  /* for */
1745
1746                 id = id_mangle_u(new_id_from_chars("L", 1), get_type_ident(mtp));
1747                 res = new_type_method(id, n_param, n_res);
1748
1749                 /* set param types and result types */
1750                 for (i = n_param = 0; i < n; ++i) {
1751                         ir_type *tp = get_method_param_type(mtp, i);
1752
1753                         if (is_Primitive_type(tp)) {
1754                                 ir_mode *mode = get_type_mode(tp);
1755
1756                                 if (mode == env->params->high_signed) {
1757                                         set_method_param_type(res, n_param++, tp_u);
1758                                         set_method_param_type(res, n_param++, tp_s);
1759                                 } else if (mode == env->params->high_unsigned) {
1760                                         set_method_param_type(res, n_param++, tp_u);
1761                                         set_method_param_type(res, n_param++, tp_u);
1762                                 } else {
1763                                         set_method_param_type(res, n_param++, tp);
1764                                 }  /* if */
1765                         } else {
1766                                 set_method_param_type(res, n_param++, tp);
1767                         }  /* if */
1768                 }  /* for */
1769                 for (i = n_res = 0; i < r; ++i) {
1770                         ir_type *tp = get_method_res_type(mtp, i);
1771
1772                         if (is_Primitive_type(tp)) {
1773                                 ir_mode *mode = get_type_mode(tp);
1774
1775                                 if (mode == env->params->high_signed) {
1776                                         set_method_res_type(res, n_res++, tp_u);
1777                                         set_method_res_type(res, n_res++, tp_s);
1778                                 } else if (mode == env->params->high_unsigned) {
1779                                         set_method_res_type(res, n_res++, tp_u);
1780                                         set_method_res_type(res, n_res++, tp_u);
1781                                 } else {
1782                                         set_method_res_type(res, n_res++, tp);
1783                                 }  /* if */
1784                         } else {
1785                                 set_method_res_type(res, n_res++, tp);
1786                         }  /* if */
1787                 }  /* for */
1788                 set_lowered_type(mtp, res);
1789                 pmap_insert(lowered_type, mtp, res);
1790         } else {
1791                 res = entry->value;
1792         }  /* if */
1793         return res;
1794 }  /* lower_mtp */
1795
1796 /**
1797  * Translate a Return.
1798  */
1799 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env) {
1800         ir_graph  *irg = current_ir_graph;
1801         ir_entity *ent = get_irg_entity(irg);
1802         ir_type   *mtp = get_entity_type(ent);
1803         ir_node   **in;
1804         int       i, j, n, idx;
1805         int       need_conv = 0;
1806         (void) mode;
1807
1808         /* check if this return must be lowered */
1809         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1810                 ir_node *pred = get_Return_res(node, i);
1811                 ir_mode *mode = get_irn_op_mode(pred);
1812
1813                 if (mode == env->params->high_signed ||
1814                         mode == env->params->high_unsigned) {
1815                         idx = get_irn_idx(pred);
1816                         if (! env->entries[idx]->low_word) {
1817                                 /* not ready yet, wait */
1818                                 pdeq_putr(env->waitq, node);
1819                                 return;
1820                         }  /* if */
1821                         need_conv = 1;
1822                 }  /* if */
1823         }  /* for */
1824         if (! need_conv)
1825                 return;
1826
1827         ent = get_irg_entity(irg);
1828         mtp = get_entity_type(ent);
1829
1830         mtp = lower_mtp(mtp, env);
1831         set_entity_type(ent, mtp);
1832
1833         /* create a new in array */
1834         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1835         in[0] = get_Return_mem(node);
1836
1837         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1838                 ir_node *pred = get_Return_res(node, i);
1839
1840                 idx = get_irn_idx(pred);
1841                 assert(idx < env->n_entries);
1842
1843                 if (env->entries[idx]) {
1844                         in[++j] = env->entries[idx]->low_word;
1845                         in[++j] = env->entries[idx]->high_word;
1846                 } else {
1847                         in[++j] = pred;
1848                 }  /* if */
1849         }  /* for */
1850
1851         set_irn_in(node, j+1, in);
1852 }  /* lower_Return */
1853
1854 /**
1855  * Translate the parameters.
1856  */
1857 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env) {
1858         ir_graph  *irg = current_ir_graph;
1859         ir_entity *ent = get_irg_entity(irg);
1860         ir_type   *tp  = get_entity_type(ent);
1861         ir_type   *mtp;
1862         long      *new_projs;
1863         int       i, j, n_params, rem;
1864         ir_node   *proj, *args;
1865         (void) mode;
1866
1867         if (is_lowered_type(tp)) {
1868                 mtp = get_associated_type(tp);
1869         } else {
1870                 mtp = tp;
1871         }  /* if */
1872         assert(! is_lowered_type(mtp));
1873
1874         n_params = get_method_n_params(mtp);
1875         if (n_params <= 0)
1876                 return;
1877
1878         NEW_ARR_A(long, new_projs, n_params);
1879
1880         /* first check if we have parameters that must be fixed */
1881         for (i = j = 0; i < n_params; ++i, ++j) {
1882                 ir_type *tp = get_method_param_type(mtp, i);
1883
1884                 new_projs[i] = j;
1885                 if (is_Primitive_type(tp)) {
1886                         ir_mode *mode = get_type_mode(tp);
1887
1888                         if (mode == env->params->high_signed ||
1889                                 mode == env->params->high_unsigned)
1890                                 ++j;
1891                 }  /* if */
1892         }  /* for */
1893         if (i == j)
1894                 return;
1895
1896         mtp = lower_mtp(mtp, env);
1897         set_entity_type(ent, mtp);
1898
1899         /* switch off optimization for new Proj nodes or they might be CSE'ed
1900            with not patched one's */
1901         rem = get_optimize();
1902         set_optimize(0);
1903
1904         /* ok, fix all Proj's and create new ones */
1905         args = get_irg_args(irg);
1906         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1907                 ir_node *pred = get_Proj_pred(proj);
1908                 long proj_nr;
1909                 int idx;
1910                 ir_mode *mode;
1911                 dbg_info *dbg;
1912
1913                 /* do not visit this node again */
1914                 mark_irn_visited(proj);
1915
1916                 if (pred != args)
1917                         continue;
1918
1919                 proj_nr = get_Proj_proj(proj);
1920                 set_Proj_proj(proj, new_projs[proj_nr]);
1921
1922                 idx = get_irn_idx(proj);
1923                 if (env->entries[idx]) {
1924                         ir_mode *low_mode = env->params->low_unsigned;
1925
1926                         mode = get_irn_mode(proj);
1927
1928                         if (mode == env->params->high_signed) {
1929                                 mode = env->params->low_signed;
1930                         } else {
1931                                 mode = env->params->low_unsigned;
1932                         }  /* if */
1933
1934                         dbg = get_irn_dbg_info(proj);
1935                         env->entries[idx]->low_word  =
1936                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, low_mode, new_projs[proj_nr]);
1937                         env->entries[idx]->high_word =
1938                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), args, mode, new_projs[proj_nr] + 1);
1939                 }  /* if */
1940         }  /* for */
1941         set_optimize(rem);
1942 }  /* lower_Start */
1943
1944 /**
1945  * Translate a Call.
1946  */
1947 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env) {
1948         ir_graph *irg = current_ir_graph;
1949         ir_type  *tp = get_Call_type(node);
1950         ir_type  *call_tp;
1951         ir_node  **in, *proj, *results;
1952         int      n_params, n_res, need_lower = 0;
1953         int      i, j;
1954         long     *res_numbers = NULL;
1955         (void) mode;
1956
1957         if (is_lowered_type(tp)) {
1958                 call_tp = get_associated_type(tp);
1959         } else {
1960                 call_tp = tp;
1961         }  /* if */
1962
1963         assert(! is_lowered_type(call_tp));
1964
1965         n_params = get_method_n_params(call_tp);
1966         for (i = 0; i < n_params; ++i) {
1967                 ir_type *tp = get_method_param_type(call_tp, i);
1968
1969                 if (is_Primitive_type(tp)) {
1970                         ir_mode *mode = get_type_mode(tp);
1971
1972                         if (mode == env->params->high_signed ||
1973                                 mode == env->params->high_unsigned) {
1974                                 need_lower = 1;
1975                                 break;
1976                         }  /* if */
1977                 }  /* if */
1978         }  /* for */
1979         n_res = get_method_n_ress(call_tp);
1980         if (n_res > 0) {
1981                 NEW_ARR_A(long, res_numbers, n_res);
1982
1983                 for (i = j = 0; i < n_res; ++i, ++j) {
1984                         ir_type *tp = get_method_res_type(call_tp, i);
1985
1986                         res_numbers[i] = j;
1987                         if (is_Primitive_type(tp)) {
1988                                 ir_mode *mode = get_type_mode(tp);
1989
1990                                 if (mode == env->params->high_signed ||
1991                                         mode == env->params->high_unsigned) {
1992                                         need_lower = 1;
1993                                         ++j;
1994                                 }  /* if */
1995                         }  /* if */
1996                 }  /* for */
1997         }  /* if */
1998
1999         if (! need_lower)
2000                 return;
2001
2002         /* let's lower it */
2003         call_tp = lower_mtp(call_tp, env);
2004         set_Call_type(node, call_tp);
2005
2006         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
2007
2008         in[0] = get_Call_mem(node);
2009         in[1] = get_Call_ptr(node);
2010
2011         for (j = 2, i = 0; i < n_params; ++i) {
2012                 ir_node *pred = get_Call_param(node, i);
2013                 int     idx = get_irn_idx(pred);
2014
2015                 if (env->entries[idx]) {
2016                         if (! env->entries[idx]->low_word) {
2017                                 /* not ready yet, wait */
2018                                 pdeq_putr(env->waitq, node);
2019                                 return;
2020                         }
2021                         in[j++] = env->entries[idx]->low_word;
2022                         in[j++] = env->entries[idx]->high_word;
2023                 } else {
2024                         in[j++] = pred;
2025                 }  /* if */
2026         }  /* for */
2027
2028         set_irn_in(node, j, in);
2029
2030         /* fix the results */
2031         results = NULL;
2032         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
2033                 long proj_nr = get_Proj_proj(proj);
2034
2035                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
2036                         /* found the result proj */
2037                         results = proj;
2038                         break;
2039                 }  /* if */
2040         }  /* for */
2041
2042         if (results) {          /* there are results */
2043                 int rem = get_optimize();
2044
2045                 /* switch off optimization for new Proj nodes or they might be CSE'ed
2046                    with not patched one's */
2047                 set_optimize(0);
2048                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
2049                         if (get_Proj_pred(proj) == results) {
2050                                 long proj_nr = get_Proj_proj(proj);
2051                                 int idx;
2052
2053                                 /* found a result */
2054                                 set_Proj_proj(proj, res_numbers[proj_nr]);
2055                                 idx = get_irn_idx(proj);
2056                                 if (env->entries[idx]) {
2057                                         ir_mode *mode = get_irn_mode(proj);
2058                                         ir_mode *low_mode = env->params->low_unsigned;
2059                                         dbg_info *dbg;
2060
2061                                         if (mode == env->params->high_signed) {
2062                                                 mode = env->params->low_signed;
2063                                         } else {
2064                                                 mode = env->params->low_unsigned;
2065                                         }  /* if */
2066
2067                                         dbg = get_irn_dbg_info(proj);
2068                                         env->entries[idx]->low_word  =
2069                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, low_mode, res_numbers[proj_nr]);
2070                                         env->entries[idx]->high_word =
2071                                                 new_rd_Proj(dbg, irg, get_nodes_block(proj), results, mode, res_numbers[proj_nr] + 1);
2072                                 }  /* if */
2073                                 mark_irn_visited(proj);
2074                         }  /* if */
2075                 }  /* for */
2076                 set_optimize(rem);
2077         }
2078 }  /* lower_Call */
2079
2080 /**
2081  * Translate an Unknown into two.
2082  */
2083 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env) {
2084         int      idx = get_irn_idx(node);
2085         ir_graph *irg = current_ir_graph;
2086         ir_mode  *low_mode = env->params->low_unsigned;
2087
2088         env->entries[idx]->low_word  = new_r_Unknown(irg, low_mode);
2089         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2090 }  /* lower_Unknown */
2091
2092 /**
2093  * Translate a Phi.
2094  *
2095  * First step: just create two templates
2096  */
2097 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env) {
2098         ir_mode  *mode_l = env->params->low_unsigned;
2099         ir_graph *irg = current_ir_graph;
2100         ir_node  *block, *unk_l, *unk_h, *phi_l, *phi_h;
2101         ir_node  **inl, **inh;
2102         dbg_info *dbg;
2103         int      idx, i, arity = get_Phi_n_preds(phi);
2104         int      enq = 0;
2105
2106         idx = get_irn_idx(phi);
2107         if (env->entries[idx]->low_word) {
2108                 /* Phi nodes already build, check for inputs */
2109                 ir_node *phil = env->entries[idx]->low_word;
2110                 ir_node *phih = env->entries[idx]->high_word;
2111
2112                 for (i = 0; i < arity; ++i) {
2113                         ir_node *pred = get_Phi_pred(phi, i);
2114                         int     idx = get_irn_idx(pred);
2115
2116                         if (env->entries[idx]->low_word) {
2117                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2118                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2119                         } else {
2120                                 /* still not ready */
2121                                 pdeq_putr(env->waitq, phi);
2122                                 return;
2123                         }  /* if */
2124                 }  /* for */
2125         }  /* if */
2126
2127         /* first create a new in array */
2128         NEW_ARR_A(ir_node *, inl, arity);
2129         NEW_ARR_A(ir_node *, inh, arity);
2130         unk_l = new_r_Unknown(irg, mode_l);
2131         unk_h = new_r_Unknown(irg, mode);
2132
2133         for (i = 0; i < arity; ++i) {
2134                 ir_node *pred = get_Phi_pred(phi, i);
2135                 int     idx = get_irn_idx(pred);
2136
2137                 if (env->entries[idx]->low_word) {
2138                         inl[i] = env->entries[idx]->low_word;
2139                         inh[i] = env->entries[idx]->high_word;
2140                 } else {
2141                         inl[i] = unk_l;
2142                         inh[i] = unk_h;
2143                         enq = 1;
2144                 }  /* if */
2145         }  /* for */
2146
2147         dbg   = get_irn_dbg_info(phi);
2148         block = get_nodes_block(phi);
2149
2150         idx = get_irn_idx(phi);
2151         assert(idx < env->n_entries);
2152         env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, irg, block, arity, inl, mode_l);
2153         env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, irg, block, arity, inh, mode);
2154
2155         /* Don't forget to link the new Phi nodes into the block! */
2156         set_irn_link(phi_l, get_irn_link(block));
2157         set_irn_link(phi_h, phi_l);
2158         set_irn_link(block, phi_h);
2159
2160         if (enq) {
2161                 /* not yet finished */
2162                 pdeq_putr(env->waitq, phi);
2163         }  /* if */
2164 }  /* lower_Phi */
2165
2166 /**
2167  * Translate a Mux.
2168  */
2169 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env) {
2170         ir_graph *irg = current_ir_graph;
2171         ir_node  *block, *val;
2172         ir_node  *true_l, *true_h, *false_l, *false_h, *sel;
2173         dbg_info *dbg;
2174         int      idx;
2175
2176         val = get_Mux_true(mux);
2177         idx = get_irn_idx(val);
2178         if (env->entries[idx]->low_word) {
2179                 /* Values already build */
2180                 true_l = env->entries[idx]->low_word;
2181                 true_h = env->entries[idx]->high_word;
2182         } else {
2183                 /* still not ready */
2184                 pdeq_putr(env->waitq, mux);
2185                 return;
2186         }  /* if */
2187
2188         val = get_Mux_false(mux);
2189         idx = get_irn_idx(val);
2190         if (env->entries[idx]->low_word) {
2191                 /* Values already build */
2192                 false_l = env->entries[idx]->low_word;
2193                 false_h = env->entries[idx]->high_word;
2194         } else {
2195                 /* still not ready */
2196                 pdeq_putr(env->waitq, mux);
2197                 return;
2198         }  /* if */
2199
2200
2201         sel = get_Mux_sel(mux);
2202
2203         dbg   = get_irn_dbg_info(mux);
2204         block = get_nodes_block(mux);
2205
2206         idx = get_irn_idx(mux);
2207         assert(idx < env->n_entries);
2208         env->entries[idx]->low_word  = new_rd_Mux(dbg, irg, block, sel, false_l, true_l, mode);
2209         env->entries[idx]->high_word = new_rd_Mux(dbg, irg, block, sel, false_h, true_h, mode);
2210 }  /* lower_Mux */
2211
2212 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env)
2213 {
2214         ir_mode *his = env->params->high_signed;
2215         ir_mode *hiu = env->params->high_unsigned;
2216         int      i;
2217         ir_node *n;
2218
2219         (void)mode;
2220
2221         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2222                 ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
2223                 if (op_mode == his || op_mode == hiu) {
2224                         panic("lowering ASM unimplemented");
2225                 }
2226         }
2227
2228         for (n = asmn;;) {
2229                 ir_mode *proj_mode;
2230
2231                 n = get_irn_link(n);
2232                 if (n == NULL)
2233                         break;
2234
2235                 proj_mode = get_irn_mode(n);
2236                 if (proj_mode == his || proj_mode == hiu) {
2237                         panic("lowering ASM unimplemented");
2238                 }
2239         }
2240 }
2241
2242 /**
2243  * check for opcodes that must always be lowered.
2244  */
2245 static int always_lower(ir_opcode code) {
2246         switch (code) {
2247         case iro_ASM:
2248         case iro_Proj:
2249         case iro_Start:
2250         case iro_Call:
2251         case iro_Return:
2252         case iro_Cond:
2253         case iro_Conv:
2254                 return 1;
2255         default:
2256                 return 0;
2257         }  /* switch */
2258 }  /* always_lower */
2259
2260 /**
2261  * lower boolean Proj(Cmp)
2262  */
2263 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env) {
2264         int      lidx, ridx;
2265         ir_node  *l, *r, *low, *high, *t, *res;
2266         pn_Cmp   pnc;
2267         ir_node  *blk;
2268         ir_graph *irg = current_ir_graph;
2269         dbg_info *db;
2270
2271         l    = get_Cmp_left(cmp);
2272         lidx = get_irn_idx(l);
2273         if (! env->entries[lidx]->low_word) {
2274                 /* still not ready */
2275                 return NULL;
2276         }  /* if */
2277
2278         r    = get_Cmp_right(cmp);
2279         ridx = get_irn_idx(r);
2280         if (! env->entries[ridx]->low_word) {
2281                 /* still not ready */
2282                 return NULL;
2283         }  /* if */
2284
2285         pnc  = get_Proj_proj(proj);
2286         blk  = get_nodes_block(cmp);
2287         db   = get_irn_dbg_info(cmp);
2288         low  = new_rd_Cmp(db, irg, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2289         high = new_rd_Cmp(db, irg, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2290
2291         if (pnc == pn_Cmp_Eq) {
2292                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2293                 res = new_rd_And(db, irg, blk,
2294                         new_r_Proj(irg, blk, low, mode_b, pnc),
2295                         new_r_Proj(irg, blk, high, mode_b, pnc),
2296                         mode_b);
2297         } else if (pnc == pn_Cmp_Lg) {
2298                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2299                 res = new_rd_Or(db, irg, blk,
2300                         new_r_Proj(irg, blk, low, mode_b, pnc),
2301                         new_r_Proj(irg, blk, high, mode_b, pnc),
2302                         mode_b);
2303         } else {
2304                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2305                 t = new_rd_And(db, irg, blk,
2306                         new_r_Proj(irg, blk, low, mode_b, pnc),
2307                         new_r_Proj(irg, blk, high, mode_b, pn_Cmp_Eq),
2308                         mode_b);
2309                 res = new_rd_Or(db, irg, blk,
2310                         new_r_Proj(irg, blk, high, mode_b, pnc & ~pn_Cmp_Eq),
2311                         t,
2312                         mode_b);
2313         }  /* if */
2314         return res;
2315 }  /* lower_boolean_Proj_Cmp */
2316
2317 /**
2318  * The type of a lower function.
2319  *
2320  * @param node   the node to be lowered
2321  * @param mode   the low mode for the destination node
2322  * @param env    the lower environment
2323  */
2324 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2325
2326 /**
2327  * Lower a node.
2328  */
2329 static void lower_ops(ir_node *node, void *env)
2330 {
2331         lower_env_t  *lenv = env;
2332         node_entry_t *entry;
2333         int          idx = get_irn_idx(node);
2334         ir_mode      *mode = get_irn_mode(node);
2335
2336         if (mode == mode_b || is_Mux(node) || is_Conv(node)) {
2337                 int i;
2338
2339                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2340                         ir_node *proj = get_irn_n(node, i);
2341
2342                         if (is_Proj(proj)) {
2343                                 ir_node *cmp = get_Proj_pred(proj);
2344
2345                                 if (is_Cmp(cmp)) {
2346                                         ir_node *arg = get_Cmp_left(cmp);
2347
2348                                         mode = get_irn_mode(arg);
2349                                         if (mode == lenv->params->high_signed ||
2350                                                 mode == lenv->params->high_unsigned) {
2351                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2352
2353                                                 if (res == NULL) {
2354                                                         /* could not lower because predecessors not ready */
2355                                                         waitq_put(lenv->waitq, node);
2356                                                         return;
2357                                                 }  /* if */
2358                                                 set_irn_n(node, i, res);
2359                                         }  /* if */
2360                                 }  /* if */
2361                         }  /* if */
2362                 }  /* for */
2363         }  /* if */
2364
2365         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2366         if (entry || always_lower(get_irn_opcode(node))) {
2367                 ir_op      *op = get_irn_op(node);
2368                 lower_func func = (lower_func)op->ops.generic;
2369
2370                 if (func) {
2371                         mode = get_irn_op_mode(node);
2372
2373                         if (mode == lenv->params->high_signed)
2374                                 mode = lenv->params->low_signed;
2375                         else
2376                                 mode = lenv->params->low_unsigned;
2377
2378                         DB((dbg, LEVEL_1, "  %+F\n", node));
2379                         func(node, mode, lenv);
2380                 }  /* if */
2381         }  /* if */
2382 }  /* lower_ops */
2383
2384 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2385
2386 /**
2387  * Compare two op_mode_entry_t's.
2388  */
2389 static int cmp_op_mode(const void *elt, const void *key, size_t size) {
2390         const op_mode_entry_t *e1 = elt;
2391         const op_mode_entry_t *e2 = key;
2392         (void) size;
2393
2394         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2395 }  /* cmp_op_mode */
2396
2397 /**
2398  * Compare two conv_tp_entry_t's.
2399  */
2400 static int cmp_conv_tp(const void *elt, const void *key, size_t size) {
2401         const conv_tp_entry_t *e1 = elt;
2402         const conv_tp_entry_t *e2 = key;
2403         (void) size;
2404
2405         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2406 }  /* static int cmp_conv_tp */
2407
2408 /**
2409  * Enter a lowering function into an ir_op.
2410  */
2411 static void enter_lower_func(ir_op *op, lower_func func) {
2412         op->ops.generic = (op_func)func;
2413 }
2414
2415 /*
2416  * Do the lowering.
2417  */
2418 void lower_dw_ops(const lwrdw_param_t *param)
2419 {
2420         lower_env_t lenv;
2421         int i;
2422         ir_graph *rem;
2423
2424         if (! param)
2425                 return;
2426
2427         if (! param->enable)
2428                 return;
2429
2430         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2431
2432         assert(2 * get_mode_size_bits(param->low_signed)   == get_mode_size_bits(param->high_signed));
2433         assert(2 * get_mode_size_bits(param->low_unsigned) == get_mode_size_bits(param->high_unsigned));
2434         assert(get_mode_size_bits(param->low_signed) == get_mode_size_bits(param->low_unsigned));
2435
2436         /* create the necessary maps */
2437         if (! prim_types)
2438                 prim_types = pmap_create();
2439         if (! intrinsic_fkt)
2440                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2441         if (! conv_types)
2442                 conv_types = new_set(cmp_conv_tp, 16);
2443         if (! lowered_type)
2444                 lowered_type = pmap_create();
2445
2446         /* create a primitive unsigned and signed type */
2447         if (! tp_u)
2448                 tp_u = get_primitive_type(param->low_unsigned);
2449         if (! tp_s)
2450                 tp_s = get_primitive_type(param->low_signed);
2451
2452         /* create method types for the created binop calls */
2453         if (! binop_tp_u) {
2454                 binop_tp_u = new_type_method(IDENT("binop_u_intrinsic"), 4, 2);
2455                 set_method_param_type(binop_tp_u, 0, tp_u);
2456                 set_method_param_type(binop_tp_u, 1, tp_u);
2457                 set_method_param_type(binop_tp_u, 2, tp_u);
2458                 set_method_param_type(binop_tp_u, 3, tp_u);
2459                 set_method_res_type(binop_tp_u, 0, tp_u);
2460                 set_method_res_type(binop_tp_u, 1, tp_u);
2461         }  /* if */
2462         if (! binop_tp_s) {
2463                 binop_tp_s = new_type_method(IDENT("binop_s_intrinsic"), 4, 2);
2464                 set_method_param_type(binop_tp_s, 0, tp_u);
2465                 set_method_param_type(binop_tp_s, 1, tp_s);
2466                 set_method_param_type(binop_tp_s, 2, tp_u);
2467                 set_method_param_type(binop_tp_s, 3, tp_s);
2468                 set_method_res_type(binop_tp_s, 0, tp_u);
2469                 set_method_res_type(binop_tp_s, 1, tp_s);
2470         }  /* if */
2471         if (! shiftop_tp_u) {
2472                 shiftop_tp_u = new_type_method(IDENT("shiftop_u_intrinsic"), 3, 2);
2473                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2474                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2475                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2476                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2477                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2478         }  /* if */
2479         if (! shiftop_tp_s) {
2480                 shiftop_tp_s = new_type_method(IDENT("shiftop_s_intrinsic"), 3, 2);
2481                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2482                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2483                 /* beware: shift count is always mode_Iu */
2484                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2485                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2486                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2487         }  /* if */
2488         if (! unop_tp_u) {
2489                 unop_tp_u = new_type_method(IDENT("unop_u_intrinsic"), 2, 2);
2490                 set_method_param_type(unop_tp_u, 0, tp_u);
2491                 set_method_param_type(unop_tp_u, 1, tp_u);
2492                 set_method_res_type(unop_tp_u, 0, tp_u);
2493                 set_method_res_type(unop_tp_u, 1, tp_u);
2494         }  /* if */
2495         if (! unop_tp_s) {
2496                 unop_tp_s = new_type_method(IDENT("unop_s_intrinsic"), 2, 2);
2497                 set_method_param_type(unop_tp_s, 0, tp_u);
2498                 set_method_param_type(unop_tp_s, 1, tp_s);
2499                 set_method_res_type(unop_tp_s, 0, tp_u);
2500                 set_method_res_type(unop_tp_s, 1, tp_s);
2501         }  /* if */
2502
2503         lenv.tv_mode_bytes = new_tarval_from_long(get_mode_size_bytes(param->low_unsigned), mode_Iu);
2504         lenv.tv_mode_bits  = new_tarval_from_long(get_mode_size_bits(param->low_unsigned), mode_Iu);
2505         lenv.waitq         = new_pdeq();
2506         lenv.params        = param;
2507
2508         /* first clear the generic function pointer for all ops */
2509         clear_irp_opcodes_generic_func();
2510
2511 #define LOWER2(op, fkt)   enter_lower_func(op_##op, fkt)
2512 #define LOWER(op)         LOWER2(op, lower_##op)
2513 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2514 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2515
2516         /* the table of all operations that must be lowered follows */
2517         LOWER(ASM);
2518         LOWER(Load);
2519         LOWER(Store);
2520         LOWER(Const);
2521         LOWER(And);
2522         LOWER(Or);
2523         LOWER(Eor);
2524         LOWER(Not);
2525         LOWER(Cond);
2526         LOWER(Return);
2527         LOWER(Call);
2528         LOWER(Unknown);
2529         LOWER(Phi);
2530         LOWER(Mux);
2531         LOWER(Start);
2532
2533         LOWER_BIN(Add);
2534         LOWER_BIN(Sub);
2535         LOWER_BIN(Mul);
2536         LOWER(Shl);
2537         LOWER(Shr);
2538         LOWER(Shrs);
2539         LOWER(Rotl);
2540         LOWER(DivMod);
2541         LOWER(Div);
2542         LOWER(Mod);
2543         LOWER_UN(Abs);
2544         LOWER_UN(Minus);
2545
2546         LOWER(Conv);
2547
2548 #undef LOWER_UN
2549 #undef LOWER_BIN
2550 #undef LOWER
2551 #undef LOWER2
2552
2553         /* transform all graphs */
2554         rem = current_ir_graph;
2555         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2556                 ir_graph *irg = get_irp_irg(i);
2557                 int n_idx;
2558
2559                 obstack_init(&lenv.obst);
2560
2561                 n_idx = get_irg_last_idx(irg);
2562                 n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2563                 lenv.n_entries = n_idx;
2564                 lenv.entries   = NEW_ARR_F(node_entry_t *, n_idx);
2565                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2566
2567                 /* first step: link all nodes and allocate data */
2568                 lenv.flags = 0;
2569                 lenv.proj_2_block = pmap_create();
2570                 irg_walk_graph(irg, firm_clear_link, prepare_links_and_handle_rotl, &lenv);
2571
2572                 if (lenv.flags & MUST_BE_LOWERED) {
2573                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2574
2575                         /* must do some work */
2576                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2577
2578                         /* last step: all waiting nodes */
2579                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2580                         current_ir_graph = irg;
2581                         while (! pdeq_empty(lenv.waitq)) {
2582                                 ir_node *node = pdeq_getl(lenv.waitq);
2583
2584                                 lower_ops(node, &lenv);
2585                         }  /* while */
2586
2587                         /* outs are invalid, we changed the graph */
2588                         set_irg_outs_inconsistent(irg);
2589
2590                         if (lenv.flags & CF_CHANGED) {
2591                                 /* control flow changed, dominance info is invalid */
2592                                 set_irg_doms_inconsistent(irg);
2593                                 set_irg_extblk_inconsistent(irg);
2594                                 set_irg_loopinfo_inconsistent(irg);
2595                         }  /* if */
2596                 }  /* if */
2597                 pmap_destroy(lenv.proj_2_block);
2598                 DEL_ARR_F(lenv.entries);
2599                 obstack_free(&lenv.obst, NULL);
2600         }  /* for */
2601         del_pdeq(lenv.waitq);
2602         current_ir_graph = rem;
2603 }  /* lower_dw_ops */
2604
2605 /* Default implementation. */
2606 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2607                                     const ir_mode *imode, const ir_mode *omode,
2608                                     void *context)
2609 {
2610         char buf[64];
2611         ident *id;
2612         ir_entity *ent;
2613         (void) context;
2614
2615         if (imode == omode) {
2616                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2617         } else {
2618                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2619                         get_mode_name(imode), get_mode_name(omode));
2620         }  /* if */
2621         id = new_id_from_str(buf);
2622
2623         ent = new_entity(get_glob_type(), id, method);
2624         set_entity_ld_ident(ent, get_entity_ident(ent));
2625         set_entity_visibility(ent, visibility_external_allocated);
2626         return ent;
2627 }  /* def_create_intrinsic_fkt */