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 #include <string.h>
  30 #include <stdlib.h>
  31 #include <assert.h>
  32
  33 #include "error.h"
  34 #include "lowering.h"
  35 #include "irnode_t.h"
  36 #include "irgraph_t.h"
  37 #include "irmode_t.h"
  38 #include "iropt_t.h"
  39 #include "irgmod.h"
  40 #include "tv_t.h"
  41 #include "dbginfo_t.h"
  42 #include "iropt_dbg.h"
  43 #include "irflag_t.h"
  44 #include "firmstat.h"
  45 #include "irgwalk.h"
  46 #include "ircons.h"
  47 #include "irflag.h"
  48 #include "irtools.h"
  49 #include "debug.h"
  50 #include "set.h"
  51 #include "pmap.h"
  52 #include "pdeq.h"
  53 #include "irdump.h"
  54 #include "array_t.h"
  55 #include "irpass_t.h"
  56
  57 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  58 static set *intrinsic_fkt;
  59
  60 /** A map from (imode, omode) to conv function types. */
  61 static set *conv_types;
  62
  63 /** A map from a method type to its lowered type. */
  64 static pmap *lowered_type;
  65
  66 /** The types for the binop and unop intrinsics. */
  67 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;
  68
  69 /** the debug handle */
  70 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  71
  72 /**
  73  * An entry in the (op, imode, omode) -> entity map.
  74  */
  75 typedef struct op_mode_entry {
  76         const ir_op   *op;    /**< the op */
  77         const ir_mode *imode; /**< the input mode */
  78         const ir_mode *omode; /**< the output mode */
  79         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  80 } op_mode_entry_t;
  81
  82 /**
  83  * An entry in the (imode, omode) -> tp map.
  84  */
  85 typedef struct conv_tp_entry {
  86         const ir_mode *imode; /**< the input mode */
  87         const ir_mode *omode; /**< the output mode */
  88         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
  89 } conv_tp_entry_t;
  90
  91 /**
  92  * Every double word node will be replaced,
  93  * we need some store to hold the replacement:
  94  */
  95 typedef struct node_entry_t {
  96         ir_node *low_word;    /**< the low word */
  97         ir_node *high_word;   /**< the high word */
  98 } node_entry_t;
  99
 100 enum lower_flags {
 101         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
 102         CF_CHANGED      = 2,  /**< control flow was changed */
 103 };
 104
 105 /**
 106  * The lower environment.
 107  */
 108 typedef struct lower_env_t {
 109         node_entry_t **entries;       /**< entries per node */
 110         struct obstack obst;          /**< an obstack holding the temporary data */
 111         ir_type  *l_mtp;              /**< lowered method type of the current method */
 112         tarval   *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 113         tarval   *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 114         pdeq     *waitq;              /**< a wait queue of all nodes that must be handled later */
 115         pmap     *proj_2_block;       /**< a map from ProjX to its destination blocks */
 116         ir_mode  *high_signed;        /**< doubleword signed type */
 117         ir_mode  *high_unsigned;      /**< doubleword unsigned type */
 118         ir_mode  *low_signed;         /**< word signed type */
 119         ir_mode  *low_unsigned;       /**< word unsigned type */
 120         ident    *first_id;           /**< .l for little and .h for big endian */
 121         ident    *next_id;            /**< .h for little and .l for big endian */
 122         const lwrdw_param_t *params;  /**< transformation parameter */
 123         unsigned flags;               /**< some flags */
 124         int      n_entries;           /**< number of entries */
 125         ir_type  *value_param_tp;     /**< the old value param type */
 126 } lower_env_t;
 127
 128 /**
 129  * Create a method type for a Conv emulation from imode to omode.
 130  */
 131 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode, lower_env_t *env)
 132 {
 133         conv_tp_entry_t key, *entry;
 134         ir_type *mtd;
 135
 136         key.imode = imode;
 137         key.omode = omode;
 138         key.mtd   = NULL;
 139
 140         entry = set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 141         if (! entry->mtd) {
 142                 int n_param = 1, n_res = 1;
 143
 144                 if (imode == env->high_signed || imode == env->high_unsigned)
 145                         n_param = 2;
 146                 if (omode == env->high_signed || omode == env->high_unsigned)
 147                         n_res = 2;
 148
 149                 /* create a new one */
 150                 mtd = new_type_method(n_param, n_res);
 151
 152                 /* set param types and result types */
 153                 n_param = 0;
 154                 if (imode == env->high_signed) {
 155                         set_method_param_type(mtd, n_param++, tp_u);
 156                         set_method_param_type(mtd, n_param++, tp_s);
 157                 } else if (imode == env->high_unsigned) {
 158                         set_method_param_type(mtd, n_param++, tp_u);
 159                         set_method_param_type(mtd, n_param++, tp_u);
 160                 } else {
 161                         ir_type *tp = get_type_for_mode(imode);
 162                         set_method_param_type(mtd, n_param++, tp);
 163                 }  /* if */
 164
 165                 n_res = 0;
 166                 if (omode == env->high_signed) {
 167                         set_method_res_type(mtd, n_res++, tp_u);
 168                         set_method_res_type(mtd, n_res++, tp_s);
 169                 } else if (omode == env->high_unsigned) {
 170                         set_method_res_type(mtd, n_res++, tp_u);
 171                         set_method_res_type(mtd, n_res++, tp_u);
 172                 } else {
 173                         ir_type *tp = get_type_for_mode(omode);
 174                         set_method_res_type(mtd, n_res++, tp);
 175                 }  /* if */
 176                 entry->mtd = mtd;
 177         } else {
 178                 mtd = entry->mtd;
 179         }  /* if */
 180         return mtd;
 181 }  /* get_conv_type */
 182
 183 /**
 184  * Add an additional control flow input to a block.
 185  * Patch all Phi nodes. The new Phi inputs are copied from
 186  * old input number nr.
 187  */
 188 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 189 {
 190         int i, arity = get_irn_arity(block);
 191         ir_node **in, *phi;
 192
 193         assert(nr < arity);
 194
 195         NEW_ARR_A(ir_node *, in, arity + 1);
 196         for (i = 0; i < arity; ++i)
 197                 in[i] = get_irn_n(block, i);
 198         in[i] = cf;
 199
 200         set_irn_in(block, i + 1, in);
 201
 202         for (phi = get_Block_phis(block); phi != NULL; phi = get_Phi_next(phi)) {
 203                 for (i = 0; i < arity; ++i)
 204                         in[i] = get_irn_n(phi, i);
 205                 in[i] = in[nr];
 206                 set_irn_in(phi, i + 1, in);
 207         }  /* for */
 208 }  /* add_block_cf_input_nr */
 209
 210 /**
 211  * Add an additional control flow input to a block.
 212  * Patch all Phi nodes. The new Phi inputs are copied from
 213  * old input from cf tmpl.
 214  */
 215 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 216 {
 217         int i, arity = get_irn_arity(block);
 218         int nr = 0;
 219
 220         for (i = 0; i < arity; ++i) {
 221                 if (get_irn_n(block, i) == tmpl) {
 222                         nr = i;
 223                         break;
 224                 }  /* if */
 225         }  /* for */
 226         assert(i < arity);
 227         add_block_cf_input_nr(block, nr, cf);
 228 }  /* add_block_cf_input */
 229
 230 /**
 231  * Return the "operational" mode of a Firm node.
 232  */
 233 static ir_mode *get_irn_op_mode(ir_node *node)
 234 {
 235         switch (get_irn_opcode(node)) {
 236         case iro_Load:
 237                 return get_Load_mode(node);
 238         case iro_Store:
 239                 return get_irn_mode(get_Store_value(node));
 240         case iro_DivMod:
 241                 return get_irn_mode(get_DivMod_left(node));
 242         case iro_Div:
 243                 return get_irn_mode(get_Div_left(node));
 244         case iro_Mod:
 245                 return get_irn_mode(get_Mod_left(node));
 246         case iro_Cmp:
 247                 return get_irn_mode(get_Cmp_left(node));
 248         default:
 249                 return get_irn_mode(node);
 250         }  /* switch */
 251 }  /* get_irn_op_mode */
 252
 253 /**
 254  * Walker, prepare the node links.
 255  */
 256 static void prepare_links(ir_node *node, void *env)
 257 {
 258         lower_env_t  *lenv = env;
 259         ir_mode      *mode = get_irn_op_mode(node);
 260         node_entry_t *link;
 261         int          i, idx;
 262
 263         if (mode == lenv->high_signed ||
 264                 mode == lenv->high_unsigned) {
 265                 /* ok, found a node that will be lowered */
 266                 link = OALLOCZ(&lenv->obst, node_entry_t);
 267
 268                 idx = get_irn_idx(node);
 269                 if (idx >= lenv->n_entries) {
 270                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 271                         int old = lenv->n_entries;
 272                         int n_idx = idx + (idx >> 3);
 273
 274                         ARR_RESIZE(node_entry_t *, lenv->entries, n_idx);
 275                         memset(&lenv->entries[old], 0, (n_idx - old) * sizeof(lenv->entries[0]));
 276                         lenv->n_entries = n_idx;
 277                 }
 278                 lenv->entries[idx] = link;
 279                 lenv->flags |= MUST_BE_LOWERED;
 280         } else if (is_Conv(node)) {
 281                 /* Conv nodes have two modes */
 282                 ir_node *pred = get_Conv_op(node);
 283                 mode = get_irn_mode(pred);
 284
 285                 if (mode == lenv->high_signed ||
 286                         mode == lenv->high_unsigned) {
 287                         /* must lower this node either but don't need a link */
 288                         lenv->flags |= MUST_BE_LOWERED;
 289                 }  /* if */
 290                 return;
 291         }  /* if */
 292
 293         if (is_Proj(node)) {
 294                 /* link all Proj nodes to its predecessor:
 295                    Note that Tuple Proj's and its Projs are linked either. */
 296                 ir_node *pred = get_Proj_pred(node);
 297
 298                 set_irn_link(node, get_irn_link(pred));
 299                 set_irn_link(pred, node);
 300         } else if (is_Phi(node)) {
 301                 /* link all Phi nodes to its block */
 302                 ir_node *block = get_nodes_block(node);
 303                 add_Block_phi(block, node);
 304         } else if (is_Block(node)) {
 305                 /* fill the Proj -> Block map */
 306                 for (i = get_Block_n_cfgpreds(node) - 1; i >= 0; --i) {
 307                         ir_node *pred = get_Block_cfgpred(node, i);
 308
 309                         if (is_Proj(pred))
 310                                 pmap_insert(lenv->proj_2_block, pred, node);
 311                 }  /* for */
 312         }  /* if */
 313 }  /* prepare_links */
 314
 315 /**
 316  * Translate a Constant: create two.
 317  */
 318 static void lower_Const(ir_node *node, ir_mode *mode, lower_env_t *env)
 319 {
 320         tarval   *tv, *tv_l, *tv_h;
 321         ir_node  *low, *high;
 322         dbg_info *dbg = get_irn_dbg_info(node);
 323         int      idx;
 324         ir_graph *irg = current_ir_graph;
 325         ir_mode  *low_mode = env->low_unsigned;
 326
 327         tv   = get_Const_tarval(node);
 328
 329         tv_l = tarval_convert_to(tv, low_mode);
 330         low  = new_rd_Const(dbg, irg, tv_l);
 331
 332         tv_h = tarval_convert_to(tarval_shrs(tv, env->tv_mode_bits), mode);
 333         high = new_rd_Const(dbg, irg, tv_h);
 334
 335         idx = get_irn_idx(node);
 336         assert(idx < env->n_entries);
 337         env->entries[idx]->low_word  = low;
 338         env->entries[idx]->high_word = high;
 339 }  /* lower_Const */
 340
 341 /**
 342  * Translate a Load: create two.
 343  */
 344 static void lower_Load(ir_node *node, ir_mode *mode, lower_env_t *env)
 345 {
 346         ir_mode    *low_mode = env->low_unsigned;
 347         ir_graph   *irg = current_ir_graph;
 348         ir_node    *adr = get_Load_ptr(node);
 349         ir_node    *mem = get_Load_mem(node);
 350         ir_node    *low, *high, *proj;
 351         dbg_info   *dbg;
 352         ir_node    *block = get_nodes_block(node);
 353         int         idx;
 354         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 355                                  ? cons_volatile : 0;
 356
 357         if (env->params->little_endian) {
 358                 low  = adr;
 359                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 360         } else {
 361                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 362                 high = adr;
 363         }  /* if */
 364
 365         /* create two loads */
 366         dbg  = get_irn_dbg_info(node);
 367         low  = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 368         proj = new_r_Proj(low, mode_M, pn_Load_M);
 369         high = new_rd_Load(dbg, block, proj, high, mode, volatility);
 370
 371         idx = get_irn_idx(node);
 372         assert(idx < env->n_entries);
 373         env->entries[idx]->low_word  = low;
 374         env->entries[idx]->high_word = high;
 375
 376         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 377                 idx = get_irn_idx(proj);
 378
 379                 switch (get_Proj_proj(proj)) {
 380                 case pn_Load_M:         /* Memory result. */
 381                         /* put it to the second one */
 382                         set_Proj_pred(proj, high);
 383                         break;
 384                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 385                         /* put it to the first one */
 386                         set_Proj_pred(proj, low);
 387                         break;
 388                 case pn_Load_res:       /* Result of load operation. */
 389                         assert(idx < env->n_entries);
 390                         env->entries[idx]->low_word  = new_r_Proj(low,  low_mode, pn_Load_res);
 391                         env->entries[idx]->high_word = new_r_Proj(high, mode,     pn_Load_res);
 392                         break;
 393                 default:
 394                         assert(0 && "unexpected Proj number");
 395                 }  /* switch */
 396                 /* mark this proj: we have handled it already, otherwise we might fall into
 397                  * out new nodes. */
 398                 mark_irn_visited(proj);
 399         }  /* for */
 400 }  /* lower_Load */
 401
 402 /**
 403  * Translate a Store: create two.
 404  */
 405 static void lower_Store(ir_node *node, ir_mode *mode, lower_env_t *env)
 406 {
 407         ir_graph     *irg;
 408         ir_node      *block, *adr, *mem;
 409         ir_node      *low, *high, *irn, *proj;
 410         dbg_info     *dbg;
 411         int           idx;
 412         node_entry_t *entry;
 413         ir_cons_flags    volatility = get_Store_volatility(node) == volatility_is_volatile
 414                                    ? cons_volatile : 0;
 415         (void) mode;
 416
 417         irn = get_Store_value(node);
 418         entry = env->entries[get_irn_idx(irn)];
 419         assert(entry);
 420
 421         if (! entry->low_word) {
 422                 /* not ready yet, wait */
 423                 pdeq_putr(env->waitq, node);
 424                 return;
 425         }  /* if */
 426
 427         irg = current_ir_graph;
 428         adr = get_Store_ptr(node);
 429         mem = get_Store_mem(node);
 430         block = get_nodes_block(node);
 431
 432         if (env->params->little_endian) {
 433                 low  = adr;
 434                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 435         } else {
 436                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 437                 high = adr;
 438         }  /* if */
 439
 440         /* create two Stores */
 441         dbg = get_irn_dbg_info(node);
 442         low  = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 443         proj = new_r_Proj(low, mode_M, pn_Store_M);
 444         high = new_rd_Store(dbg, block, proj, high, entry->high_word, volatility);
 445
 446         idx = get_irn_idx(node);
 447         assert(idx < env->n_entries);
 448         env->entries[idx]->low_word  = low;
 449         env->entries[idx]->high_word = high;
 450
 451         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 452                 idx = get_irn_idx(proj);
 453
 454                 switch (get_Proj_proj(proj)) {
 455                 case pn_Store_M:         /* Memory result. */
 456                         /* put it to the second one */
 457                         set_Proj_pred(proj, high);
 458                         break;
 459                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 460                         /* put it to the first one */
 461                         set_Proj_pred(proj, low);
 462                         break;
 463                 default:
 464                         assert(0 && "unexpected Proj number");
 465                 }  /* switch */
 466                 /* mark this proj: we have handled it already, otherwise we might fall into
 467                  * out new nodes. */
 468                 mark_irn_visited(proj);
 469         }  /* for */
 470 }  /* lower_Store */
 471
 472 /**
 473  * Return a node containing the address of the intrinsic emulation function.
 474  *
 475  * @param method  the method type of the emulation function
 476  * @param op      the emulated ir_op
 477  * @param imode   the input mode of the emulated opcode
 478  * @param omode   the output mode of the emulated opcode
 479  * @param env     the lower environment
 480  */
 481 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 482                                       ir_mode *imode, ir_mode *omode,
 483                                       lower_env_t *env)
 484 {
 485         symconst_symbol sym;
 486         ir_entity *ent;
 487         op_mode_entry_t key, *entry;
 488
 489         key.op    = op;
 490         key.imode = imode;
 491         key.omode = omode;
 492         key.ent   = NULL;
 493
 494         entry = set_insert(intrinsic_fkt, &key, sizeof(key),
 495                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 496         if (! entry->ent) {
 497                 /* create a new one */
 498                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 499
 500                 assert(ent && "Intrinsic creator must return an entity");
 501                 entry->ent = ent;
 502         } else {
 503                 ent = entry->ent;
 504         }  /* if */
 505         sym.entity_p = ent;
 506         return new_r_SymConst(current_ir_graph, mode_P_code, sym, symconst_addr_ent);
 507 }  /* get_intrinsic_address */
 508
 509 /**
 510  * Translate a Div.
 511  *
 512  * Create an intrinsic Call.
 513  */
 514 static void lower_Div(ir_node *node, ir_mode *mode, lower_env_t *env)
 515 {
 516         ir_node  *block, *irn, *call, *proj;
 517         ir_node  *in[4];
 518         ir_mode  *opmode;
 519         dbg_info *dbg;
 520         ir_type  *mtp;
 521         int      idx;
 522         node_entry_t *entry;
 523
 524         irn   = get_Div_left(node);
 525         entry = env->entries[get_irn_idx(irn)];
 526         assert(entry);
 527
 528         if (! entry->low_word) {
 529                 /* not ready yet, wait */
 530                 pdeq_putr(env->waitq, node);
 531                 return;
 532         }  /* if */
 533
 534         in[0] = entry->low_word;
 535         in[1] = entry->high_word;
 536
 537         irn   = get_Div_right(node);
 538         entry = env->entries[get_irn_idx(irn)];
 539         assert(entry);
 540
 541         if (! entry->low_word) {
 542                 /* not ready yet, wait */
 543                 pdeq_putr(env->waitq, node);
 544                 return;
 545         }  /* if */
 546
 547         in[2] = entry->low_word;
 548         in[3] = entry->high_word;
 549
 550         dbg   = get_irn_dbg_info(node);
 551         block = get_nodes_block(node);
 552
 553         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 554         opmode = get_irn_op_mode(node);
 555         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 556         call = new_rd_Call(dbg, block, get_Div_mem(node), irn, 4, in, mtp);
 557         set_irn_pinned(call, get_irn_pinned(node));
 558         irn = new_r_Proj(call, mode_T, pn_Call_T_result);
 559
 560         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 561                 switch (get_Proj_proj(proj)) {
 562                 case pn_Div_M:         /* Memory result. */
 563                         /* reroute to the call */
 564                         set_Proj_pred(proj, call);
 565                         set_Proj_proj(proj, pn_Call_M);
 566                         break;
 567                 case pn_Div_X_except:  /* Execution result if exception occurred. */
 568                         /* reroute to the call */
 569                         set_Proj_pred(proj, call);
 570                         set_Proj_proj(proj, pn_Call_X_except);
 571                         break;
 572                 case pn_Div_res:       /* Result of computation. */
 573                         idx = get_irn_idx(proj);
 574                         assert(idx < env->n_entries);
 575                         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 576                         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 577                         break;
 578                 default:
 579                         assert(0 && "unexpected Proj number");
 580                 }  /* switch */
 581                 /* mark this proj: we have handled it already, otherwise we might fall into
 582                  * out new nodes. */
 583                 mark_irn_visited(proj);
 584         }  /* for */
 585 }  /* lower_Div */
 586
 587 /**
 588  * Translate a Mod.
 589  *
 590  * Create an intrinsic Call.
 591  */
 592 static void lower_Mod(ir_node *node, ir_mode *mode, lower_env_t *env)
 593 {
 594         ir_node  *block, *proj, *irn, *call;
 595         ir_node  *in[4];
 596         ir_mode  *opmode;
 597         dbg_info *dbg;
 598         ir_type  *mtp;
 599         int      idx;
 600         node_entry_t *entry;
 601
 602         irn   = get_Mod_left(node);
 603         entry = env->entries[get_irn_idx(irn)];
 604         assert(entry);
 605
 606         if (! entry->low_word) {
 607                 /* not ready yet, wait */
 608                 pdeq_putr(env->waitq, node);
 609                 return;
 610         }  /* if */
 611
 612         in[0] = entry->low_word;
 613         in[1] = entry->high_word;
 614
 615         irn   = get_Mod_right(node);
 616         entry = env->entries[get_irn_idx(irn)];
 617         assert(entry);
 618
 619         if (! entry->low_word) {
 620                 /* not ready yet, wait */
 621                 pdeq_putr(env->waitq, node);
 622                 return;
 623         }  /* if */
 624
 625         in[2] = entry->low_word;
 626         in[3] = entry->high_word;
 627
 628         dbg   = get_irn_dbg_info(node);
 629         block = get_nodes_block(node);
 630
 631         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 632         opmode = get_irn_op_mode(node);
 633         irn = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode, env);
 634         call = new_rd_Call(dbg, block, get_Mod_mem(node), irn, 4, in, mtp);
 635         set_irn_pinned(call, get_irn_pinned(node));
 636         irn = new_r_Proj(call, mode_T, pn_Call_T_result);
 637
 638         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 639                 switch (get_Proj_proj(proj)) {
 640                 case pn_Mod_M:         /* Memory result. */
 641                         /* reroute to the call */
 642                         set_Proj_pred(proj, call);
 643                         set_Proj_proj(proj, pn_Call_M);
 644                         break;
 645                 case pn_Mod_X_except:  /* Execution result if exception occurred. */
 646                         /* reroute to the call */
 647                         set_Proj_pred(proj, call);
 648                         set_Proj_proj(proj, pn_Call_X_except);
 649                         break;
 650                 case pn_Mod_res:       /* Result of computation. */
 651                         idx = get_irn_idx(proj);
 652                         assert(idx < env->n_entries);
 653                         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 654                         env->entries[idx]->high_word = new_r_Proj(irn, mode,                      1);
 655                         break;
 656                 default:
 657                         assert(0 && "unexpected Proj number");
 658                 }  /* switch */
 659                 /* mark this proj: we have handled it already, otherwise we might fall into
 660                  * out new nodes. */
 661                 mark_irn_visited(proj);
 662         }  /* for */
 663 }  /* lower_Mod */
 664
 665 /**
 666  * Translate a DivMod.
 667  *
 668  * Create two intrinsic Calls.
 669  */
 670 static void lower_DivMod(ir_node *node, ir_mode *mode, lower_env_t *env)
 671 {
 672         ir_node  *block, *proj, *irn, *mem, *callDiv, *callMod;
 673         ir_node  *resDiv = NULL;
 674         ir_node  *resMod = NULL;
 675         ir_node  *in[4];
 676         ir_mode  *opmode;
 677         dbg_info *dbg;
 678         ir_type  *mtp;
 679         int      idx;
 680         node_entry_t *entry;
 681         unsigned flags = 0;
 682
 683         /* check if both results are needed */
 684         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 685                 switch (get_Proj_proj(proj)) {
 686                 case pn_DivMod_res_div: flags |= 1; break;
 687                 case pn_DivMod_res_mod: flags |= 2; break;
 688                 default: break;
 689                 }  /* switch */
 690         }  /* for */
 691
 692         irn   = get_DivMod_left(node);
 693         entry = env->entries[get_irn_idx(irn)];
 694         assert(entry);
 695
 696         if (! entry->low_word) {
 697                 /* not ready yet, wait */
 698                 pdeq_putr(env->waitq, node);
 699                 return;
 700         }  /* if */
 701
 702         in[0] = entry->low_word;
 703         in[1] = entry->high_word;
 704
 705         irn   = get_DivMod_right(node);
 706         entry = env->entries[get_irn_idx(irn)];
 707         assert(entry);
 708
 709         if (! entry->low_word) {
 710                 /* not ready yet, wait */
 711                 pdeq_putr(env->waitq, node);
 712                 return;
 713         }  /* if */
 714
 715         in[2] = entry->low_word;
 716         in[3] = entry->high_word;
 717
 718         dbg   = get_irn_dbg_info(node);
 719         block = get_nodes_block(node);
 720
 721         mem = get_DivMod_mem(node);
 722
 723         callDiv = callMod = NULL;
 724         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 725         if (flags & 1) {
 726                 opmode = get_irn_op_mode(node);
 727                 irn = get_intrinsic_address(mtp, op_Div, opmode, opmode, env);
 728                 callDiv = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 729                 set_irn_pinned(callDiv, get_irn_pinned(node));
 730                 resDiv = new_r_Proj(callDiv, mode_T, pn_Call_T_result);
 731         }  /* if */
 732         if (flags & 2) {
 733                 if (flags & 1)
 734                         mem = new_r_Proj(callDiv, mode_M, pn_Call_M);
 735                 opmode = get_irn_op_mode(node);
 736                 irn = get_intrinsic_address(mtp, op_Mod, opmode, opmode, env);
 737                 callMod = new_rd_Call(dbg, block, mem, irn, 4, in, mtp);
 738                 set_irn_pinned(callMod, get_irn_pinned(node));
 739                 resMod = new_r_Proj(callMod, mode_T, pn_Call_T_result);
 740         }  /* if */
 741
 742         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
 743                 switch (get_Proj_proj(proj)) {
 744                 case pn_DivMod_M:         /* Memory result. */
 745                         /* reroute to the first call */
 746                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 747                         set_Proj_proj(proj, pn_Call_M);
 748                         break;
 749                 case pn_DivMod_X_except:  /* Execution result if exception occurred. */
 750                         /* reroute to the first call */
 751                         set_Proj_pred(proj, callDiv ? callDiv : (callMod ? callMod : mem));
 752                         set_Proj_proj(proj, pn_Call_X_except);
 753                         break;
 754                 case pn_DivMod_res_div:   /* Result of Div. */
 755                         idx = get_irn_idx(proj);
 756                         assert(idx < env->n_entries);
 757                         env->entries[idx]->low_word  = new_r_Proj(resDiv, env->low_unsigned, 0);
 758                         env->entries[idx]->high_word = new_r_Proj(resDiv, mode,                      1);
 759                         break;
 760                 case pn_DivMod_res_mod:   /* Result of Mod. */
 761                         idx = get_irn_idx(proj);
 762                         env->entries[idx]->low_word  = new_r_Proj(resMod, env->low_unsigned, 0);
 763                         env->entries[idx]->high_word = new_r_Proj(resMod, mode,                      1);
 764                         break;
 765                 default:
 766                         assert(0 && "unexpected Proj number");
 767                 }  /* switch */
 768                 /* mark this proj: we have handled it already, otherwise we might fall into
 769                  * out new nodes. */
 770                 mark_irn_visited(proj);
 771         }  /* for */
 772 }  /* lower_DivMod */
 773
 774 /**
 775  * Translate a Binop.
 776  *
 777  * Create an intrinsic Call.
 778  */
 779 static void lower_Binop(ir_node *node, ir_mode *mode, lower_env_t *env)
 780 {
 781         ir_node  *block, *irn;
 782         ir_node  *in[4];
 783         dbg_info *dbg;
 784         ir_type  *mtp;
 785         int      idx;
 786         ir_graph *irg;
 787         node_entry_t *entry;
 788
 789         irn   = get_binop_left(node);
 790         entry = env->entries[get_irn_idx(irn)];
 791         assert(entry);
 792
 793         if (! entry->low_word) {
 794                 /* not ready yet, wait */
 795                 pdeq_putr(env->waitq, node);
 796                 return;
 797         }  /* if */
 798
 799         in[0] = entry->low_word;
 800         in[1] = entry->high_word;
 801
 802         irn   = get_binop_right(node);
 803         entry = env->entries[get_irn_idx(irn)];
 804         assert(entry);
 805
 806         if (! entry->low_word) {
 807                 /* not ready yet, wait */
 808                 pdeq_putr(env->waitq, node);
 809                 return;
 810         }  /* if */
 811
 812         in[2] = entry->low_word;
 813         in[3] = entry->high_word;
 814
 815         dbg   = get_irn_dbg_info(node);
 816         block = get_nodes_block(node);
 817         irg   = current_ir_graph;
 818
 819         mtp = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 820         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 821         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 822                 irn, 4, in, mtp);
 823         set_irn_pinned(irn, get_irn_pinned(node));
 824         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
 825
 826         idx = get_irn_idx(node);
 827         assert(idx < env->n_entries);
 828         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 829         env->entries[idx]->high_word = new_r_Proj(irn, mode,              1);
 830 }  /* lower_Binop */
 831
 832 /**
 833  * Translate a Shiftop.
 834  *
 835  * Create an intrinsic Call.
 836  */
 837 static void lower_Shiftop(ir_node *node, ir_mode *mode, lower_env_t *env)
 838 {
 839         ir_node  *block, *irn;
 840         ir_node  *in[3];
 841         dbg_info *dbg;
 842         ir_type  *mtp;
 843         int      idx;
 844         ir_graph *irg;
 845         node_entry_t *entry;
 846
 847         irn   = get_binop_left(node);
 848         entry = env->entries[get_irn_idx(irn)];
 849         assert(entry);
 850
 851         if (! entry->low_word) {
 852                 /* not ready yet, wait */
 853                 pdeq_putr(env->waitq, node);
 854                 return;
 855         }  /* if */
 856
 857         in[0] = entry->low_word;
 858         in[1] = entry->high_word;
 859
 860         /* The shift count is always mode_Iu in firm, so there is no need for lowering */
 861         in[2] = get_binop_right(node);
 862         assert(get_irn_mode(in[2]) != env->high_signed
 863                         && get_irn_mode(in[2]) != env->high_unsigned);
 864
 865         dbg   = get_irn_dbg_info(node);
 866         block = get_nodes_block(node);
 867         irg  = current_ir_graph;
 868
 869         mtp = mode_is_signed(mode) ? shiftop_tp_s : shiftop_tp_u;
 870         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
 871         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
 872                 irn, 3, in, mtp);
 873         set_irn_pinned(irn, get_irn_pinned(node));
 874         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
 875
 876         idx = get_irn_idx(node);
 877         assert(idx < env->n_entries);
 878         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
 879         env->entries[idx]->high_word = new_r_Proj(irn, mode,              1);
 880 }  /* lower_Shiftop */
 881
 882 /**
 883  * Translate a Shr and handle special cases.
 884  */
 885 static void lower_Shr(ir_node *node, ir_mode *mode, lower_env_t *env)
 886 {
 887         ir_node  *right = get_Shr_right(node);
 888         ir_graph *irg = current_ir_graph;
 889
 890         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 891                 tarval *tv = get_Const_tarval(right);
 892
 893                 if (tarval_is_long(tv) &&
 894                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 895                         ir_node *block        = get_nodes_block(node);
 896                         ir_node *left         = get_Shr_left(node);
 897                         ir_mode *low_unsigned = env->low_unsigned;
 898                         ir_node *c;
 899                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 900                         int idx = get_irn_idx(left);
 901
 902                         left = env->entries[idx]->high_word;
 903                         if (left == NULL) {
 904                                 /* not ready yet, wait */
 905                                 pdeq_putr(env->waitq, node);
 906                                 return;
 907                         }
 908
 909                         idx = get_irn_idx(node);
 910                         /* convert high word into low_unsigned mode if necessary */
 911                         if (get_irn_mode(left) != low_unsigned)
 912                                 left = new_r_Conv(block, left, low_unsigned);
 913
 914                         if (shf_cnt > 0) {
 915                                 c = new_r_Const_long(irg, low_unsigned, shf_cnt);
 916                                 env->entries[idx]->low_word = new_r_Shr(block, left, c,
 917                                                                         low_unsigned);
 918                         } else {
 919                                 env->entries[idx]->low_word = left;
 920                         }  /* if */
 921                         env->entries[idx]->high_word = new_r_Const(irg, get_mode_null(mode));
 922
 923                         return;
 924                 }  /* if */
 925         }  /* if */
 926         lower_Shiftop(node, mode, env);
 927 }  /* lower_Shr */
 928
 929 /**
 930  * Translate a Shl and handle special cases.
 931  */
 932 static void lower_Shl(ir_node *node, ir_mode *mode, lower_env_t *env)
 933 {
 934         ir_node  *right = get_Shl_right(node);
 935         ir_graph *irg = current_ir_graph;
 936
 937         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 938                 tarval *tv = get_Const_tarval(right);
 939
 940                 if (tarval_is_long(tv) &&
 941                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 942                         ir_mode *mode_l;
 943                         ir_node *block = get_nodes_block(node);
 944                         ir_node *left = get_Shl_left(node);
 945                         ir_node *c;
 946                         long shf_cnt = get_tarval_long(tv) - get_mode_size_bits(mode);
 947                         int idx = get_irn_idx(left);
 948
 949                         left = env->entries[idx]->low_word;
 950                         if (left == NULL) {
 951                                 /* not ready yet, wait */
 952                                 pdeq_putr(env->waitq, node);
 953                                 return;
 954                         }
 955
 956                         left = new_r_Conv(block, left, mode);
 957                         idx = get_irn_idx(node);
 958
 959                         mode_l = env->low_unsigned;
 960                         if (shf_cnt > 0) {
 961                                 c = new_r_Const_long(irg, mode_l, shf_cnt);
 962                                 env->entries[idx]->high_word = new_r_Shl(block, left, c, mode);
 963                         } else {
 964                                 env->entries[idx]->high_word = left;
 965                         }  /* if */
 966                         env->entries[idx]->low_word  = new_r_Const(irg, get_mode_null(mode_l));
 967
 968                         return;
 969                 }  /* if */
 970         }  /* if */
 971         lower_Shiftop(node, mode, env);
 972 }  /* lower_Shl */
 973
 974 /**
 975  * Translate a Shrs and handle special cases.
 976  */
 977 static void lower_Shrs(ir_node *node, ir_mode *mode, lower_env_t *env)
 978 {
 979         ir_node  *right = get_Shrs_right(node);
 980         ir_graph *irg = current_ir_graph;
 981
 982         if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
 983                 tarval *tv = get_Const_tarval(right);
 984
 985                 if (tarval_is_long(tv) &&
 986                     get_tarval_long(tv) >= (long)get_mode_size_bits(mode)) {
 987                         ir_node *block         = get_nodes_block(node);
 988                         ir_node *left          = get_Shrs_left(node);
 989                         ir_mode *low_unsigned  = env->low_unsigned;
 990                         long     shf_cnt       = get_tarval_long(tv) - get_mode_size_bits(mode);
 991                         int      idx           = get_irn_idx(left);
 992                         ir_node *left_unsigned = left;
 993                         ir_node *low;
 994                         ir_node *c;
 995
 996                         left = env->entries[idx]->high_word;
 997                         if (left == NULL) {
 998                                 /* not ready yet, wait */
 999                                 pdeq_putr(env->waitq, node);
1000                                 return;
1001                         }
1002
1003                         idx = get_irn_idx(node);
1004                         /* convert high word into low_unsigned mode if necessary */
1005                         if (get_irn_mode(left_unsigned) != low_unsigned)
1006                                 left_unsigned = new_r_Conv(block, left, low_unsigned);
1007
1008                         if (shf_cnt > 0) {
1009                                 c   = new_r_Const_long(irg, low_unsigned, shf_cnt);
1010                                 low = new_r_Shrs(block, left_unsigned, c, low_unsigned);
1011                         } else {
1012                                 low = left_unsigned;
1013                         }  /* if */
1014                         /* low word is expected to have low_unsigned */
1015                         env->entries[idx]->low_word = new_r_Conv(block, low, low_unsigned);
1016
1017                         c = new_r_Const_long(irg, low_unsigned,
1018                                              get_mode_size_bits(mode) - 1);
1019                         env->entries[idx]->high_word = new_r_Shrs(block, left, c, mode);
1020
1021                         return;
1022                 }  /* if */
1023         }  /* if */
1024         lower_Shiftop(node, mode, env);
1025 }  /* lower_Shrs */
1026
1027 /**
1028  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1029  */
1030 static void prepare_links_and_handle_rotl(ir_node *node, void *env)
1031 {
1032         lower_env_t *lenv = env;
1033
1034         if (is_Rotl(node)) {
1035                 ir_mode *mode = get_irn_op_mode(node);
1036                         if (mode == lenv->high_signed ||
1037                             mode == lenv->high_unsigned) {
1038                                 ir_node  *right = get_Rotl_right(node);
1039                                 ir_node  *left, *shl, *shr, *or, *block, *sub, *c;
1040                                 ir_mode  *omode, *rmode;
1041                                 dbg_info *dbg;
1042                                 optimization_state_t state;
1043
1044                                 if (get_mode_arithmetic(mode) == irma_twos_complement && is_Const(right)) {
1045                                         tarval *tv = get_Const_tarval(right);
1046
1047                                         if (tarval_is_long(tv) &&
1048                                             get_tarval_long(tv) == (long)get_mode_size_bits(mode)) {
1049                                                 /* will be optimized in lower_Rotl() */
1050                                                 return;
1051                                         }
1052                                 }
1053
1054                                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) and lower those */
1055                                 dbg   = get_irn_dbg_info(node);
1056                                 omode = get_irn_mode(node);
1057                                 left  = get_Rotl_left(node);
1058                                 block = get_nodes_block(node);
1059                                 shl   = new_rd_Shl(dbg, block, left, right, omode);
1060                                 rmode = get_irn_mode(right);
1061                                 c     = new_Const_long(rmode, get_mode_size_bits(omode));
1062                                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
1063                                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
1064
1065                                 /* optimization must be switched off here, or we will get the Rotl back */
1066                                 save_optimization_state(&state);
1067                                 set_opt_algebraic_simplification(0);
1068                                 or = new_rd_Or(dbg, block, shl, shr, omode);
1069                                 restore_optimization_state(&state);
1070
1071                                 exchange(node, or);
1072
1073                                 /* do lowering on the new nodes */
1074                                 prepare_links(shl, env);
1075                                 prepare_links(c, env);
1076                                 prepare_links(sub, env);
1077                                 prepare_links(shr, env);
1078                                 prepare_links(or, env);
1079                         }
1080         } else {
1081                 prepare_links(node, env);
1082         }
1083 }
1084
1085 /**
1086  * Translate a special case Rotl(x, sizeof(w)).
1087  */
1088 static void lower_Rotl(ir_node *node, ir_mode *mode, lower_env_t *env)
1089 {
1090         ir_node *right = get_Rotl_right(node);
1091         ir_node *left = get_Rotl_left(node);
1092         ir_node *h, *l;
1093         int idx = get_irn_idx(left);
1094         (void) right;
1095         (void) mode;
1096
1097         assert(get_mode_arithmetic(mode) == irma_twos_complement &&
1098                is_Const(right) && tarval_is_long(get_Const_tarval(right)) &&
1099                get_tarval_long(get_Const_tarval(right)) == (long)get_mode_size_bits(mode));
1100
1101         l = env->entries[idx]->low_word;
1102         h = env->entries[idx]->high_word;
1103         idx = get_irn_idx(node);
1104
1105         env->entries[idx]->low_word  = h;
1106         env->entries[idx]->high_word = l;
1107 }  /* lower_Rotl */
1108
1109 /**
1110  * Translate an Unop.
1111  *
1112  * Create an intrinsic Call.
1113  */
1114 static void lower_Unop(ir_node *node, ir_mode *mode, lower_env_t *env)
1115 {
1116         ir_node  *block, *irn;
1117         ir_node  *in[2];
1118         dbg_info *dbg;
1119         ir_type  *mtp;
1120         int      idx;
1121         node_entry_t *entry;
1122
1123         irn   = get_unop_op(node);
1124         entry = env->entries[get_irn_idx(irn)];
1125         assert(entry);
1126
1127         if (! entry->low_word) {
1128                 /* not ready yet, wait */
1129                 pdeq_putr(env->waitq, node);
1130                 return;
1131         }  /* if */
1132
1133         in[0] = entry->low_word;
1134         in[1] = entry->high_word;
1135
1136         dbg   = get_irn_dbg_info(node);
1137         block = get_nodes_block(node);
1138
1139         mtp = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1140         irn = get_intrinsic_address(mtp, get_irn_op(node), mode, mode, env);
1141         irn = new_rd_Call(dbg, block, get_irg_no_mem(current_ir_graph),
1142                 irn, 2, in, mtp);
1143         set_irn_pinned(irn, get_irn_pinned(node));
1144         irn = new_r_Proj(irn, mode_T, pn_Call_T_result);
1145
1146         idx = get_irn_idx(node);
1147         assert(idx < env->n_entries);
1148         env->entries[idx]->low_word  = new_r_Proj(irn, env->low_unsigned, 0);
1149         env->entries[idx]->high_word = new_r_Proj(irn, mode,              1);
1150 }  /* lower_Unop */
1151
1152 /**
1153  * Translate a logical Binop.
1154  *
1155  * Create two logical Binops.
1156  */
1157 static void lower_Binop_logical(ir_node *node, ir_mode *mode, lower_env_t *env,
1158                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) ) {
1159         ir_node  *block, *irn;
1160         ir_node  *lop_l, *lop_h, *rop_l, *rop_h;
1161         dbg_info *dbg;
1162         int      idx;
1163         ir_graph *irg;
1164         node_entry_t *entry;
1165
1166         irn   = get_binop_left(node);
1167         entry = env->entries[get_irn_idx(irn)];
1168         assert(entry);
1169
1170         if (! entry->low_word) {
1171                 /* not ready yet, wait */
1172                 pdeq_putr(env->waitq, node);
1173                 return;
1174         }  /* if */
1175
1176         lop_l = entry->low_word;
1177         lop_h = entry->high_word;
1178
1179         irn   = get_binop_right(node);
1180         entry = env->entries[get_irn_idx(irn)];
1181         assert(entry);
1182
1183         if (! entry->low_word) {
1184                 /* not ready yet, wait */
1185                 pdeq_putr(env->waitq, node);
1186                 return;
1187         }  /* if */
1188
1189         rop_l = entry->low_word;
1190         rop_h = entry->high_word;
1191
1192         dbg = get_irn_dbg_info(node);
1193         block = get_nodes_block(node);
1194
1195         idx = get_irn_idx(node);
1196         assert(idx < env->n_entries);
1197         irg = current_ir_graph;
1198         env->entries[idx]->low_word  = constr_rd(dbg, block, lop_l, rop_l, env->low_unsigned);
1199         env->entries[idx]->high_word = constr_rd(dbg, block, lop_h, rop_h, mode);
1200 }  /* lower_Binop_logical */
1201
1202 /** create a logical operation transformation */
1203 #define lower_logical(op)                                                \
1204 static void lower_##op(ir_node *node, ir_mode *mode, lower_env_t *env) { \
1205         lower_Binop_logical(node, mode, env, new_rd_##op);                   \
1206 }
1207
1208 lower_logical(And)
1209 lower_logical(Or)
1210 lower_logical(Eor)
1211
1212 /**
1213  * Translate a Not.
1214  *
1215  * Create two logical Nots.
1216  */
1217 static void lower_Not(ir_node *node, ir_mode *mode, lower_env_t *env)
1218 {
1219         ir_node  *block, *irn;
1220         ir_node  *op_l, *op_h;
1221         dbg_info *dbg;
1222         int      idx;
1223         node_entry_t *entry;
1224
1225         irn   = get_Not_op(node);
1226         entry = env->entries[get_irn_idx(irn)];
1227         assert(entry);
1228
1229         if (! entry->low_word) {
1230                 /* not ready yet, wait */
1231                 pdeq_putr(env->waitq, node);
1232                 return;
1233         }  /* if */
1234
1235         op_l = entry->low_word;
1236         op_h = entry->high_word;
1237
1238         dbg   = get_irn_dbg_info(node);
1239         block = get_nodes_block(node);
1240
1241         idx = get_irn_idx(node);
1242         assert(idx < env->n_entries);
1243         env->entries[idx]->low_word  = new_rd_Not(dbg, block, op_l, env->low_unsigned);
1244         env->entries[idx]->high_word = new_rd_Not(dbg, block, op_h, mode);
1245 }  /* lower_Not */
1246
1247 /**
1248  * Translate a Cond.
1249  */
1250 static void lower_Cond(ir_node *node, ir_mode *mode, lower_env_t *env)
1251 {
1252         ir_node *cmp, *left, *right, *block;
1253         ir_node *sel = get_Cond_selector(node);
1254         ir_mode *m = get_irn_mode(sel);
1255         int     idx;
1256         (void) mode;
1257
1258         if (m == mode_b) {
1259                 node_entry_t *lentry, *rentry;
1260                 ir_node  *proj, *projT = NULL, *projF = NULL;
1261                 ir_node  *new_bl, *cmpH, *cmpL, *irn;
1262                 ir_node  *projHF, *projHT;
1263                 ir_node  *dst_blk;
1264                 pn_Cmp   pnc;
1265                 ir_graph *irg;
1266                 dbg_info *dbg;
1267
1268                 if (!is_Proj(sel))
1269                         return;
1270
1271                 cmp   = get_Proj_pred(sel);
1272                 if (!is_Cmp(cmp))
1273                         return;
1274
1275                 left  = get_Cmp_left(cmp);
1276                 idx   = get_irn_idx(left);
1277                 lentry = env->entries[idx];
1278
1279                 if (! lentry) {
1280                         /* a normal Cmp */
1281                         return;
1282                 }  /* if */
1283
1284                 right = get_Cmp_right(cmp);
1285                 idx   = get_irn_idx(right);
1286                 rentry = env->entries[idx];
1287                 assert(rentry);
1288
1289                 if (! lentry->low_word || !rentry->low_word) {
1290                         /* not yet ready */
1291                         pdeq_putr(env->waitq, node);
1292                         return;
1293                 }  /* if */
1294
1295                 /* all right, build the code */
1296                 for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1297                         long proj_nr = get_Proj_proj(proj);
1298
1299                         if (proj_nr == pn_Cond_true) {
1300                                 assert(projT == NULL && "more than one Proj(true)");
1301                                 projT = proj;
1302                         } else {
1303                                 assert(proj_nr == pn_Cond_false);
1304                                 assert(projF == NULL && "more than one Proj(false)");
1305                                 projF = proj;
1306                         }  /* if */
1307                         mark_irn_visited(proj);
1308                 }  /* for */
1309                 assert(projT && projF);
1310
1311                 /* create a new high compare */
1312                 block = get_nodes_block(node);
1313                 irg   = get_Block_irg(block);
1314                 dbg   = get_irn_dbg_info(cmp);
1315                 pnc   = get_Proj_proj(sel);
1316
1317                 if (is_Const(right) && is_Const_null(right)) {
1318                         if (pnc == pn_Cmp_Eq || pnc == pn_Cmp_Lg) {
1319                                 /* x ==/!= 0 ==> or(low,high) ==/!= 0 */
1320                                 ir_mode *mode = env->low_unsigned;
1321                                 ir_node *low  = new_r_Conv(block, lentry->low_word, mode);
1322                                 ir_node *high = new_r_Conv(block, lentry->high_word, mode);
1323                                 ir_node *or   = new_rd_Or(dbg, block, low, high, mode);
1324                                 ir_node *cmp  = new_rd_Cmp(dbg, block, or, new_Const_long(mode, 0));
1325
1326                                 ir_node *proj = new_r_Proj(cmp, mode_b, pnc);
1327                                 set_Cond_selector(node, proj);
1328                                 return;
1329                         }
1330                 }
1331
1332                 cmpH = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word);
1333
1334                 if (pnc == pn_Cmp_Eq) {
1335                         /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1336                         pmap_entry *entry = pmap_find(env->proj_2_block, projF);
1337
1338                         assert(entry);
1339                         dst_blk = entry->value;
1340
1341                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Eq);
1342                         dbg = get_irn_dbg_info(node);
1343                         irn = new_rd_Cond(dbg, block, irn);
1344
1345                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1346                         mark_irn_visited(projHF);
1347                         exchange(projF, projHF);
1348
1349                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1350                         mark_irn_visited(projHT);
1351
1352                         new_bl = new_r_Block(irg, 1, &projHT);
1353
1354                         dbg   = get_irn_dbg_info(cmp);
1355                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1356                         irn = new_r_Proj(cmpL, mode_b, pn_Cmp_Eq);
1357                         dbg = get_irn_dbg_info(node);
1358                         irn = new_rd_Cond(dbg, new_bl, irn);
1359
1360                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1361                         mark_irn_visited(proj);
1362                         add_block_cf_input(dst_blk, projHF, proj);
1363
1364                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1365                         mark_irn_visited(proj);
1366                         exchange(projT, proj);
1367                 } else if (pnc == pn_Cmp_Lg) {
1368                         /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1369                         pmap_entry *entry = pmap_find(env->proj_2_block, projT);
1370
1371                         assert(entry);
1372                         dst_blk = entry->value;
1373
1374                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Lg);
1375                         dbg = get_irn_dbg_info(node);
1376                         irn = new_rd_Cond(dbg, block, irn);
1377
1378                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1379                         mark_irn_visited(projHT);
1380                         exchange(projT, projHT);
1381
1382                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1383                         mark_irn_visited(projHF);
1384
1385                         new_bl = new_r_Block(irg, 1, &projHF);
1386
1387                         dbg   = get_irn_dbg_info(cmp);
1388                         cmpL = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word);
1389                         irn = new_r_Proj(cmpL, mode_b, pn_Cmp_Lg);
1390                         dbg = get_irn_dbg_info(node);
1391                         irn = new_rd_Cond(dbg, new_bl, irn);
1392
1393                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1394                         mark_irn_visited(proj);
1395                         add_block_cf_input(dst_blk, projHT, proj);
1396
1397                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1398                         mark_irn_visited(proj);
1399                         exchange(projF, proj);
1400                 } else {
1401                         /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1402                         ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1403                         pmap_entry *entry;
1404
1405                         entry = pmap_find(env->proj_2_block, projT);
1406                         assert(entry);
1407                         dstT = entry->value;
1408
1409                         entry = pmap_find(env->proj_2_block, projF);
1410                         assert(entry);
1411                         dstF = entry->value;
1412
1413                         irn = new_r_Proj(cmpH, mode_b, pnc & ~pn_Cmp_Eq);
1414                         dbg = get_irn_dbg_info(node);
1415                         irn = new_rd_Cond(dbg, block, irn);
1416
1417                         projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1418                         mark_irn_visited(projHT);
1419                         exchange(projT, projHT);
1420                         projT = projHT;
1421
1422                         projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1423                         mark_irn_visited(projHF);
1424
1425                         newbl_eq = new_r_Block(irg, 1, &projHF);
1426
1427                         irn = new_r_Proj(cmpH, mode_b, pn_Cmp_Eq);
1428                         irn = new_rd_Cond(dbg, newbl_eq, irn);
1429
1430                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1431                         mark_irn_visited(proj);
1432                         exchange(projF, proj);
1433                         projF = proj;
1434
1435                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1436                         mark_irn_visited(proj);
1437
1438                         newbl_l = new_r_Block(irg, 1, &proj);
1439
1440                         dbg   = get_irn_dbg_info(cmp);
1441                         cmpL = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word);
1442                         irn = new_r_Proj(cmpL, mode_b, pnc);
1443                         dbg = get_irn_dbg_info(node);
1444                         irn = new_rd_Cond(dbg, newbl_l, irn);
1445
1446                         proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1447                         mark_irn_visited(proj);
1448                         add_block_cf_input(dstT, projT, proj);
1449
1450                         proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1451                         mark_irn_visited(proj);
1452                         add_block_cf_input(dstF, projF, proj);
1453                 }  /* if */
1454
1455                 /* we have changed the control flow */
1456                 env->flags |= CF_CHANGED;
1457         } else {
1458                 idx = get_irn_idx(sel);
1459
1460                 if (env->entries[idx]) {
1461                         /*
1462                            Bad, a jump-table with double-word index.
1463                            This should not happen, but if it does we handle
1464                            it like a Conv were between (in other words, ignore
1465                            the high part.
1466                          */
1467
1468                         if (! env->entries[idx]->low_word) {
1469                                 /* not ready yet, wait */
1470                                 pdeq_putr(env->waitq, node);
1471                                 return;
1472                         }  /* if */
1473                         set_Cond_selector(node, env->entries[idx]->low_word);
1474                 }  /* if */
1475         }  /* if */
1476 }  /* lower_Cond */
1477
1478 /**
1479  * Translate a Conv to higher_signed
1480  */
1481 static void lower_Conv_to_Ll(ir_node *node, lower_env_t *env)
1482 {
1483         ir_mode  *omode        = get_irn_mode(node);
1484         ir_node  *op           = get_Conv_op(node);
1485         ir_mode  *imode        = get_irn_mode(op);
1486         int      idx           = get_irn_idx(node);
1487         ir_graph *irg          = current_ir_graph;
1488         ir_node  *block        = get_nodes_block(node);
1489         dbg_info *dbg          = get_irn_dbg_info(node);
1490         node_entry_t *entry = env->entries[idx];
1491         ir_mode  *low_unsigned = env->low_unsigned;
1492         ir_mode  *low_signed
1493                 = mode_is_signed(omode) ? env->low_signed : low_unsigned;
1494
1495         assert(idx < env->n_entries);
1496
1497         if (mode_is_int(imode) || mode_is_reference(imode)) {
1498                 if (imode == env->high_signed
1499                                 || imode == env->high_unsigned) {
1500                         /* a Conv from Lu to Ls or Ls to Lu */
1501                         int           op_idx   = get_irn_idx(op);
1502                         node_entry_t *op_entry = env->entries[op_idx];
1503
1504                         if (! op_entry->low_word) {
1505                                 /* not ready yet, wait */
1506                                 pdeq_putr(env->waitq, node);
1507                                 return;
1508                         }
1509                         entry->low_word  = op_entry->low_word;
1510                         entry->high_word = new_rd_Conv(dbg, block, op_entry->high_word,
1511                                                        low_signed);
1512                 } else {
1513                         /* simple case: create a high word */
1514                         if (imode != low_unsigned)
1515                                 op = new_rd_Conv(dbg, block, op, low_unsigned);
1516
1517                         entry->low_word = op;
1518
1519                         if (mode_is_signed(imode)) {
1520                                 int      c       = get_mode_size_bits(low_signed) - 1;
1521                                 ir_node *cnst    = new_Const_long(low_unsigned, c);
1522                                 if (get_irn_mode(op) != low_signed)
1523                                         op = new_rd_Conv(dbg, block, op, low_signed);
1524                                 entry->high_word = new_rd_Shrs(dbg, block, op, cnst,
1525                                                                low_signed);
1526                         } else {
1527                                 entry->high_word = new_Const(get_mode_null(low_signed));
1528                         }
1529                 }
1530         } else if (imode == mode_b) {
1531                 entry->low_word = new_rd_Conv(dbg, block, op, low_unsigned);
1532                 entry->high_word = new_Const(get_mode_null(low_signed));
1533         } else {
1534                 ir_node *irn, *call;
1535                 ir_type *mtp = get_conv_type(imode, omode, env);
1536
1537                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1538                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1539                 set_irn_pinned(call, get_irn_pinned(node));
1540                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1541
1542                 entry->low_word  = new_r_Proj(irn, low_unsigned, 0);
1543                 entry->high_word = new_r_Proj(irn, low_signed, 1);
1544         }
1545 }
1546
1547 /**
1548  * Translate a Conv from higher_unsigned
1549  */
1550 static void lower_Conv_from_Ll(ir_node *node, lower_env_t *env)
1551 {
1552         ir_node      *op    = get_Conv_op(node);
1553         ir_mode      *omode = get_irn_mode(node);
1554         ir_node      *block = get_nodes_block(node);
1555         dbg_info     *dbg   = get_irn_dbg_info(node);
1556         int          idx    = get_irn_idx(op);
1557         ir_graph     *irg   = current_ir_graph;
1558         node_entry_t *entry = env->entries[idx];
1559
1560         assert(idx < env->n_entries);
1561
1562         if (! entry->low_word) {
1563                 /* not ready yet, wait */
1564                 pdeq_putr(env->waitq, node);
1565                 return;
1566         }
1567
1568         if (mode_is_int(omode) || mode_is_reference(omode)) {
1569                 op = entry->low_word;
1570
1571                 /* simple case: create a high word */
1572                 if (omode != env->low_unsigned)
1573                         op = new_rd_Conv(dbg, block, op, omode);
1574
1575                 set_Conv_op(node, op);
1576         } else if (omode == mode_b) {
1577                 /* llu ? true : false  <=> (low|high) ? true : false */
1578                 ir_mode *mode = env->low_unsigned;
1579                 ir_node *or   = new_rd_Or(dbg, block, entry->low_word, entry->high_word,
1580                                           mode);
1581                 set_Conv_op(node, or);
1582         } else {
1583                 ir_node *irn, *call, *in[2];
1584                 ir_mode *imode = get_irn_mode(op);
1585                 ir_type *mtp   = get_conv_type(imode, omode, env);
1586
1587                 irn   = get_intrinsic_address(mtp, get_irn_op(node), imode, omode, env);
1588                 in[0] = entry->low_word;
1589                 in[1] = entry->high_word;
1590
1591                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1592                 set_irn_pinned(call, get_irn_pinned(node));
1593                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1594
1595                 exchange(node, new_r_Proj(irn, omode, 0));
1596         }
1597 }
1598
1599 /**
1600  * Translate a Conv.
1601  */
1602 static void lower_Conv(ir_node *node, ir_mode *mode, lower_env_t *env)
1603 {
1604         mode = get_irn_mode(node);
1605
1606         if (mode == env->high_signed
1607                         || mode == env->high_unsigned) {
1608                 lower_Conv_to_Ll(node, env);
1609         } else {
1610                 ir_mode *mode = get_irn_mode(get_Conv_op(node));
1611
1612                 if (mode == env->high_signed
1613                                 || mode == env->high_unsigned) {
1614                         lower_Conv_from_Ll(node, env);
1615                 }
1616         }
1617 }
1618
1619 /**
1620  * Lower the method type.
1621  *
1622  * @param mtp  the method type to lower
1623  * @param ent  the lower environment
1624  *
1625  * @return the lowered type
1626  */
1627 static ir_type *lower_mtp(ir_type *mtp, lower_env_t *env)
1628 {
1629         pmap_entry *entry;
1630         ident      *lid;
1631         ir_type    *res, *value_type;
1632
1633         if (is_lowered_type(mtp))
1634                 return mtp;
1635
1636         entry = pmap_find(lowered_type, mtp);
1637         if (! entry) {
1638                 int i, n, r, n_param, n_res;
1639
1640                 /* count new number of params */
1641                 n_param = n = get_method_n_params(mtp);
1642                 for (i = n_param - 1; i >= 0; --i) {
1643                         ir_type *tp = get_method_param_type(mtp, i);
1644
1645                         if (is_Primitive_type(tp)) {
1646                                 ir_mode *mode = get_type_mode(tp);
1647
1648                                 if (mode == env->high_signed ||
1649                                         mode == env->high_unsigned)
1650                                         ++n_param;
1651                         }  /* if */
1652                 }  /* for */
1653
1654                 /* count new number of results */
1655                 n_res = r = get_method_n_ress(mtp);
1656                 for (i = n_res - 1; i >= 0; --i) {
1657                         ir_type *tp = get_method_res_type(mtp, i);
1658
1659                         if (is_Primitive_type(tp)) {
1660                                 ir_mode *mode = get_type_mode(tp);
1661
1662                                 if (mode == env->high_signed ||
1663                                         mode == env->high_unsigned)
1664                                         ++n_res;
1665                         }  /* if */
1666                 }  /* for */
1667
1668                 res = new_type_method(n_param, n_res);
1669
1670                 /* set param types and result types */
1671                 for (i = n_param = 0; i < n; ++i) {
1672                         ir_type *tp = get_method_param_type(mtp, i);
1673
1674                         if (is_Primitive_type(tp)) {
1675                                 ir_mode *mode = get_type_mode(tp);
1676
1677                                 if (mode == env->high_signed) {
1678                                         set_method_param_type(res, n_param++, tp_u);
1679                                         set_method_param_type(res, n_param++, tp_s);
1680                                 } else if (mode == env->high_unsigned) {
1681                                         set_method_param_type(res, n_param++, tp_u);
1682                                         set_method_param_type(res, n_param++, tp_u);
1683                                 } else {
1684                                         set_method_param_type(res, n_param++, tp);
1685                                 }  /* if */
1686                         } else {
1687                                 set_method_param_type(res, n_param++, tp);
1688                         }  /* if */
1689                 }  /* for */
1690                 for (i = n_res = 0; i < r; ++i) {
1691                         ir_type *tp = get_method_res_type(mtp, i);
1692
1693                         if (is_Primitive_type(tp)) {
1694                                 ir_mode *mode = get_type_mode(tp);
1695
1696                                 if (mode == env->high_signed) {
1697                                         set_method_res_type(res, n_res++, tp_u);
1698                                         set_method_res_type(res, n_res++, tp_s);
1699                                 } else if (mode == env->high_unsigned) {
1700                                         set_method_res_type(res, n_res++, tp_u);
1701                                         set_method_res_type(res, n_res++, tp_u);
1702                                 } else {
1703                                         set_method_res_type(res, n_res++, tp);
1704                                 }  /* if */
1705                         } else {
1706                                 set_method_res_type(res, n_res++, tp);
1707                         }  /* if */
1708                 }  /* for */
1709                 set_lowered_type(mtp, res);
1710                 pmap_insert(lowered_type, mtp, res);
1711
1712                 value_type = get_method_value_param_type(mtp);
1713                 if (value_type != NULL) {
1714                         /* this creates a new value parameter type */
1715                         (void)get_method_value_param_ent(res, 0);
1716
1717                         /* set new param positions */
1718                         for (i = n_param = 0; i < n; ++i) {
1719                                 ir_type   *tp  = get_method_param_type(mtp, i);
1720                                 ident     *id  = get_method_param_ident(mtp, i);
1721                                 ir_entity *ent = get_method_value_param_ent(mtp, i);
1722
1723                                 set_entity_link(ent, INT_TO_PTR(n_param));
1724                                 if (is_Primitive_type(tp)) {
1725                                         ir_mode *mode = get_type_mode(tp);
1726
1727                                         if (mode == env->high_signed || mode == env->high_unsigned) {
1728                                                 if (id != NULL) {
1729                                                         lid = id_mangle(id, env->first_id);
1730                                                         set_method_param_ident(res, n_param, lid);
1731                                                         set_entity_ident(get_method_value_param_ent(res, n_param), lid);
1732                                                         lid = id_mangle(id, env->next_id);
1733                                                         set_method_param_ident(res, n_param + 1, lid);
1734                                                         set_entity_ident(get_method_value_param_ent(res, n_param + 1), lid);
1735                                                 }  /* if */
1736                                                 n_param += 2;
1737                                                 continue;
1738                                         }  /* if */
1739                                 }  /* if */
1740                                 if (id != NULL) {
1741                                         set_method_param_ident(res, n_param, id);
1742                                         set_entity_ident(get_method_value_param_ent(res, n_param), id);
1743                                 }  /* if */
1744                                 ++n_param;
1745                         }  /* for */
1746
1747                         set_lowered_type(value_type, get_method_value_param_type(res));
1748                 }  /* if */
1749         } else {
1750                 res = entry->value;
1751         }  /* if */
1752         return res;
1753 }  /* lower_mtp */
1754
1755 /**
1756  * Translate a Return.
1757  */
1758 static void lower_Return(ir_node *node, ir_mode *mode, lower_env_t *env)
1759 {
1760         ir_graph  *irg = current_ir_graph;
1761         ir_entity *ent = get_irg_entity(irg);
1762         ir_type   *mtp = get_entity_type(ent);
1763         ir_node   **in;
1764         int       i, j, n, idx;
1765         int       need_conv = 0;
1766         (void) mode;
1767
1768         /* check if this return must be lowered */
1769         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1770                 ir_node *pred = get_Return_res(node, i);
1771                 ir_mode *mode = get_irn_op_mode(pred);
1772
1773                 if (mode == env->high_signed ||
1774                         mode == env->high_unsigned) {
1775                         idx = get_irn_idx(pred);
1776                         if (! env->entries[idx]->low_word) {
1777                                 /* not ready yet, wait */
1778                                 pdeq_putr(env->waitq, node);
1779                                 return;
1780                         }  /* if */
1781                         need_conv = 1;
1782                 }  /* if */
1783         }  /* for */
1784         if (! need_conv)
1785                 return;
1786
1787         ent = get_irg_entity(irg);
1788         mtp = get_entity_type(ent);
1789
1790         mtp = lower_mtp(mtp, env);
1791         set_entity_type(ent, mtp);
1792
1793         /* create a new in array */
1794         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1795         in[0] = get_Return_mem(node);
1796
1797         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1798                 ir_node *pred = get_Return_res(node, i);
1799
1800                 idx = get_irn_idx(pred);
1801                 assert(idx < env->n_entries);
1802
1803                 if (env->entries[idx]) {
1804                         in[++j] = env->entries[idx]->low_word;
1805                         in[++j] = env->entries[idx]->high_word;
1806                 } else {
1807                         in[++j] = pred;
1808                 }  /* if */
1809         }  /* for */
1810
1811         set_irn_in(node, j+1, in);
1812 }  /* lower_Return */
1813
1814 /**
1815  * Translate the parameters.
1816  */
1817 static void lower_Start(ir_node *node, ir_mode *mode, lower_env_t *env)
1818 {
1819         ir_graph  *irg = get_irn_irg(node);
1820         ir_entity *ent = get_irg_entity(irg);
1821         ir_type   *tp  = get_entity_type(ent);
1822         ir_type   *mtp;
1823         long      *new_projs;
1824         int       i, j, n_params, rem;
1825         ir_node   *proj, *args;
1826         (void) mode;
1827
1828         if (is_lowered_type(tp)) {
1829                 mtp = get_associated_type(tp);
1830         } else {
1831                 mtp = tp;
1832         }  /* if */
1833         assert(! is_lowered_type(mtp));
1834
1835         n_params = get_method_n_params(mtp);
1836         if (n_params <= 0)
1837                 return;
1838
1839         NEW_ARR_A(long, new_projs, n_params);
1840
1841         /* first check if we have parameters that must be fixed */
1842         for (i = j = 0; i < n_params; ++i, ++j) {
1843                 ir_type *tp = get_method_param_type(mtp, i);
1844
1845                 new_projs[i] = j;
1846                 if (is_Primitive_type(tp)) {
1847                         ir_mode *mode = get_type_mode(tp);
1848
1849                         if (mode == env->high_signed ||
1850                                 mode == env->high_unsigned)
1851                                 ++j;
1852                 }  /* if */
1853         }  /* for */
1854         if (i == j)
1855                 return;
1856
1857         mtp = lower_mtp(mtp, env);
1858         set_entity_type(ent, mtp);
1859
1860         /* switch off optimization for new Proj nodes or they might be CSE'ed
1861            with not patched one's */
1862         rem = get_optimize();
1863         set_optimize(0);
1864
1865         /* ok, fix all Proj's and create new ones */
1866         args = get_irg_args(irg);
1867         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1868                 ir_node *pred = get_Proj_pred(proj);
1869                 long proj_nr;
1870                 int idx;
1871                 ir_mode *mode;
1872                 dbg_info *dbg;
1873
1874                 /* do not visit this node again */
1875                 mark_irn_visited(proj);
1876
1877                 if (pred != args)
1878                         continue;
1879
1880                 proj_nr = get_Proj_proj(proj);
1881                 set_Proj_proj(proj, new_projs[proj_nr]);
1882
1883                 idx = get_irn_idx(proj);
1884                 if (env->entries[idx]) {
1885                         ir_mode *low_mode = env->low_unsigned;
1886
1887                         mode = get_irn_mode(proj);
1888
1889                         if (mode == env->high_signed) {
1890                                 mode = env->low_signed;
1891                         } else {
1892                                 mode = env->low_unsigned;
1893                         }  /* if */
1894
1895                         dbg = get_irn_dbg_info(proj);
1896                         env->entries[idx]->low_word  =
1897                                 new_rd_Proj(dbg, args, low_mode, new_projs[proj_nr]);
1898                         env->entries[idx]->high_word =
1899                                 new_rd_Proj(dbg, args, mode, new_projs[proj_nr] + 1);
1900                 }  /* if */
1901         }  /* for */
1902         set_optimize(rem);
1903 }  /* lower_Start */
1904
1905 /**
1906  * Translate a Call.
1907  */
1908 static void lower_Call(ir_node *node, ir_mode *mode, lower_env_t *env)
1909 {
1910         ir_type  *tp = get_Call_type(node);
1911         ir_type  *call_tp;
1912         ir_node  **in, *proj, *results;
1913         int      n_params, n_res, need_lower = 0;
1914         int      i, j;
1915         long     *res_numbers = NULL;
1916         (void) mode;
1917
1918         if (is_lowered_type(tp)) {
1919                 call_tp = get_associated_type(tp);
1920         } else {
1921                 call_tp = tp;
1922         }  /* if */
1923
1924         assert(! is_lowered_type(call_tp));
1925
1926         n_params = get_method_n_params(call_tp);
1927         for (i = 0; i < n_params; ++i) {
1928                 ir_type *tp = get_method_param_type(call_tp, i);
1929
1930                 if (is_Primitive_type(tp)) {
1931                         ir_mode *mode = get_type_mode(tp);
1932
1933                         if (mode == env->high_signed ||
1934                                 mode == env->high_unsigned) {
1935                                 need_lower = 1;
1936                                 break;
1937                         }  /* if */
1938                 }  /* if */
1939         }  /* for */
1940         n_res = get_method_n_ress(call_tp);
1941         if (n_res > 0) {
1942                 NEW_ARR_A(long, res_numbers, n_res);
1943
1944                 for (i = j = 0; i < n_res; ++i, ++j) {
1945                         ir_type *tp = get_method_res_type(call_tp, i);
1946
1947                         res_numbers[i] = j;
1948                         if (is_Primitive_type(tp)) {
1949                                 ir_mode *mode = get_type_mode(tp);
1950
1951                                 if (mode == env->high_signed ||
1952                                         mode == env->high_unsigned) {
1953                                         need_lower = 1;
1954                                         ++j;
1955                                 }  /* if */
1956                         }  /* if */
1957                 }  /* for */
1958         }  /* if */
1959
1960         if (! need_lower)
1961                 return;
1962
1963         /* let's lower it */
1964         call_tp = lower_mtp(call_tp, env);
1965         set_Call_type(node, call_tp);
1966
1967         NEW_ARR_A(ir_node *, in, get_method_n_params(call_tp) + 2);
1968
1969         in[0] = get_Call_mem(node);
1970         in[1] = get_Call_ptr(node);
1971
1972         for (j = 2, i = 0; i < n_params; ++i) {
1973                 ir_node *pred = get_Call_param(node, i);
1974                 int     idx = get_irn_idx(pred);
1975
1976                 if (env->entries[idx]) {
1977                         if (! env->entries[idx]->low_word) {
1978                                 /* not ready yet, wait */
1979                                 pdeq_putr(env->waitq, node);
1980                                 return;
1981                         }
1982                         in[j++] = env->entries[idx]->low_word;
1983                         in[j++] = env->entries[idx]->high_word;
1984                 } else {
1985                         in[j++] = pred;
1986                 }  /* if */
1987         }  /* for */
1988
1989         set_irn_in(node, j, in);
1990
1991         /* fix the results */
1992         results = NULL;
1993         for (proj = get_irn_link(node); proj; proj = get_irn_link(proj)) {
1994                 long proj_nr = get_Proj_proj(proj);
1995
1996                 if (proj_nr == pn_Call_T_result && get_Proj_pred(proj) == node) {
1997                         /* found the result proj */
1998                         results = proj;
1999                         break;
2000                 }  /* if */
2001         }  /* for */
2002
2003         if (results) {    /* there are results */
2004                 int rem = get_optimize();
2005
2006                 /* switch off optimization for new Proj nodes or they might be CSE'ed
2007                    with not patched one's */
2008                 set_optimize(0);
2009                 for (i = j = 0, proj = get_irn_link(results); proj; proj = get_irn_link(proj), ++i, ++j) {
2010                         if (get_Proj_pred(proj) == results) {
2011                                 long proj_nr = get_Proj_proj(proj);
2012                                 int idx;
2013
2014                                 /* found a result */
2015                                 set_Proj_proj(proj, res_numbers[proj_nr]);
2016                                 idx = get_irn_idx(proj);
2017                                 if (env->entries[idx]) {
2018                                         ir_mode *mode = get_irn_mode(proj);
2019                                         ir_mode *low_mode = env->low_unsigned;
2020                                         dbg_info *dbg;
2021
2022                                         if (mode == env->high_signed) {
2023                                                 mode = env->low_signed;
2024                                         } else {
2025                                                 mode = env->low_unsigned;
2026                                         }  /* if */
2027
2028                                         dbg = get_irn_dbg_info(proj);
2029                                         env->entries[idx]->low_word  =
2030                                                 new_rd_Proj(dbg, results, low_mode, res_numbers[proj_nr]);
2031                                         env->entries[idx]->high_word =
2032                                                 new_rd_Proj(dbg, results, mode, res_numbers[proj_nr] + 1);
2033                                 }  /* if */
2034                                 mark_irn_visited(proj);
2035                         }  /* if */
2036                 }  /* for */
2037                 set_optimize(rem);
2038         }
2039 }  /* lower_Call */
2040
2041 /**
2042  * Translate an Unknown into two.
2043  */
2044 static void lower_Unknown(ir_node *node, ir_mode *mode, lower_env_t *env)
2045 {
2046         int      idx = get_irn_idx(node);
2047         ir_graph *irg = get_irn_irg(node);
2048         ir_mode  *low_mode = env->low_unsigned;
2049
2050         env->entries[idx]->low_word  = new_r_Unknown(irg, low_mode);
2051         env->entries[idx]->high_word = new_r_Unknown(irg, mode);
2052 }  /* lower_Unknown */
2053
2054 /**
2055  * Translate a Phi.
2056  *
2057  * First step: just create two templates
2058  */
2059 static void lower_Phi(ir_node *phi, ir_mode *mode, lower_env_t *env)
2060 {
2061         ir_mode  *mode_l = env->low_unsigned;
2062         ir_graph *irg = get_irn_irg(phi);
2063         ir_node  *block, *unk_l, *unk_h, *phi_l, *phi_h;
2064         ir_node  **inl, **inh;
2065         dbg_info *dbg;
2066         int      idx, i, arity = get_Phi_n_preds(phi);
2067         int      enq = 0;
2068
2069         idx = get_irn_idx(phi);
2070         if (env->entries[idx]->low_word) {
2071                 /* Phi nodes already build, check for inputs */
2072                 ir_node *phil = env->entries[idx]->low_word;
2073                 ir_node *phih = env->entries[idx]->high_word;
2074
2075                 for (i = 0; i < arity; ++i) {
2076                         ir_node *pred = get_Phi_pred(phi, i);
2077                         int     idx = get_irn_idx(pred);
2078
2079                         if (env->entries[idx]->low_word) {
2080                                 set_Phi_pred(phil, i, env->entries[idx]->low_word);
2081                                 set_Phi_pred(phih, i, env->entries[idx]->high_word);
2082                         } else {
2083                                 /* still not ready */
2084                                 pdeq_putr(env->waitq, phi);
2085                                 return;
2086                         }  /* if */
2087                 }  /* for */
2088         }  /* if */
2089
2090         /* first create a new in array */
2091         NEW_ARR_A(ir_node *, inl, arity);
2092         NEW_ARR_A(ir_node *, inh, arity);
2093         unk_l = new_r_Unknown(irg, mode_l);
2094         unk_h = new_r_Unknown(irg, mode);
2095
2096         for (i = 0; i < arity; ++i) {
2097                 ir_node *pred = get_Phi_pred(phi, i);
2098                 int     idx = get_irn_idx(pred);
2099
2100                 if (env->entries[idx]->low_word) {
2101                         inl[i] = env->entries[idx]->low_word;
2102                         inh[i] = env->entries[idx]->high_word;
2103                 } else {
2104                         inl[i] = unk_l;
2105                         inh[i] = unk_h;
2106                         enq = 1;
2107                 }  /* if */
2108         }  /* for */
2109
2110         dbg   = get_irn_dbg_info(phi);
2111         block = get_nodes_block(phi);
2112
2113         idx = get_irn_idx(phi);
2114         assert(idx < env->n_entries);
2115         env->entries[idx]->low_word  = phi_l = new_rd_Phi(dbg, block, arity, inl, mode_l);
2116         env->entries[idx]->high_word = phi_h = new_rd_Phi(dbg, block, arity, inh, mode);
2117
2118         /* Don't forget to link the new Phi nodes into the block.
2119          * Beware that some Phis might be optimized away. */
2120         if (is_Phi(phi_l))
2121                 add_Block_phi(block, phi_l);
2122         if (is_Phi(phi_h))
2123                 add_Block_phi(block, phi_h);
2124
2125         if (enq) {
2126                 /* not yet finished */
2127                 pdeq_putr(env->waitq, phi);
2128         }  /* if */
2129 }  /* lower_Phi */
2130
2131 /**
2132  * Translate a Mux.
2133  */
2134 static void lower_Mux(ir_node *mux, ir_mode *mode, lower_env_t *env)
2135 {
2136         ir_node  *block, *val;
2137         ir_node  *true_l, *true_h, *false_l, *false_h, *sel;
2138         dbg_info *dbg;
2139         int      idx;
2140
2141         val = get_Mux_true(mux);
2142         idx = get_irn_idx(val);
2143         if (env->entries[idx]->low_word) {
2144                 /* Values already build */
2145                 true_l = env->entries[idx]->low_word;
2146                 true_h = env->entries[idx]->high_word;
2147         } else {
2148                 /* still not ready */
2149                 pdeq_putr(env->waitq, mux);
2150                 return;
2151         }  /* if */
2152
2153         val = get_Mux_false(mux);
2154         idx = get_irn_idx(val);
2155         if (env->entries[idx]->low_word) {
2156                 /* Values already build */
2157                 false_l = env->entries[idx]->low_word;
2158                 false_h = env->entries[idx]->high_word;
2159         } else {
2160                 /* still not ready */
2161                 pdeq_putr(env->waitq, mux);
2162                 return;
2163         }  /* if */
2164
2165
2166         sel = get_Mux_sel(mux);
2167
2168         dbg   = get_irn_dbg_info(mux);
2169         block = get_nodes_block(mux);
2170
2171         idx = get_irn_idx(mux);
2172         assert(idx < env->n_entries);
2173         env->entries[idx]->low_word  = new_rd_Mux(dbg, block, sel, false_l, true_l, env->low_unsigned);
2174         env->entries[idx]->high_word = new_rd_Mux(dbg, block, sel, false_h, true_h, mode);
2175 }  /* lower_Mux */
2176
2177 /**
2178  * Translate an ASM node.
2179  */
2180 static void lower_ASM(ir_node *asmn, ir_mode *mode, lower_env_t *env)
2181 {
2182         ir_mode *his = env->high_signed;
2183         ir_mode *hiu = env->high_unsigned;
2184         int      i;
2185         ir_node *n;
2186
2187         (void)mode;
2188
2189         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2190                 ir_mode *op_mode = get_irn_mode(get_irn_n(asmn, i));
2191                 if (op_mode == his || op_mode == hiu) {
2192                         panic("lowering ASM unimplemented");
2193                 }  /* if */
2194         }  /* for */
2195
2196         for (n = asmn;;) {
2197                 ir_mode *proj_mode;
2198
2199                 n = get_irn_link(n);
2200                 if (n == NULL)
2201                         break;
2202
2203                 proj_mode = get_irn_mode(n);
2204                 if (proj_mode == his || proj_mode == hiu) {
2205                         panic("lowering ASM unimplemented");
2206                 }  /* if */
2207         }  /* for */
2208 }  /* lower_ASM */
2209
2210 /**
2211  * Translate a Sel node.
2212  */
2213 static void lower_Sel(ir_node *sel, ir_mode *mode, lower_env_t *env)
2214 {
2215         (void) mode;
2216
2217         /* we must only lower value parameter Sels if we change the
2218            value parameter type. */
2219         if (env->value_param_tp != NULL) {
2220                 ir_entity *ent = get_Sel_entity(sel);
2221             if (get_entity_owner(ent) == env->value_param_tp) {
2222                         int pos = PTR_TO_INT(get_entity_link(ent));
2223
2224                         ent = get_method_value_param_ent(env->l_mtp, pos);
2225                         set_Sel_entity(sel, ent);
2226                 }  /* if */
2227         }  /* if */
2228 }  /* lower_Sel */
2229
2230 /**
2231  * check for opcodes that must always be lowered.
2232  */
2233 static int always_lower(ir_opcode code)
2234 {
2235         switch (code) {
2236         case iro_ASM:
2237         case iro_Proj:
2238         case iro_Start:
2239         case iro_Call:
2240         case iro_Return:
2241         case iro_Cond:
2242         case iro_Conv:
2243         case iro_Sel:
2244                 return 1;
2245         default:
2246                 return 0;
2247         }  /* switch */
2248 }  /* always_lower */
2249
2250 /**
2251  * lower boolean Proj(Cmp)
2252  */
2253 static ir_node *lower_boolean_Proj_Cmp(ir_node *proj, ir_node *cmp, lower_env_t *env)
2254 {
2255         int      lidx, ridx;
2256         ir_node  *l, *r, *low, *high, *t, *res;
2257         pn_Cmp   pnc;
2258         ir_node  *blk;
2259         dbg_info *db;
2260
2261         l    = get_Cmp_left(cmp);
2262         lidx = get_irn_idx(l);
2263         if (! env->entries[lidx]->low_word) {
2264                 /* still not ready */
2265                 return NULL;
2266         }  /* if */
2267
2268         r    = get_Cmp_right(cmp);
2269         ridx = get_irn_idx(r);
2270         if (! env->entries[ridx]->low_word) {
2271                 /* still not ready */
2272                 return NULL;
2273         }  /* if */
2274
2275         pnc  = get_Proj_proj(proj);
2276         blk  = get_nodes_block(cmp);
2277         db   = get_irn_dbg_info(cmp);
2278         low  = new_rd_Cmp(db, blk, env->entries[lidx]->low_word, env->entries[ridx]->low_word);
2279         high = new_rd_Cmp(db, blk, env->entries[lidx]->high_word, env->entries[ridx]->high_word);
2280
2281         if (pnc == pn_Cmp_Eq) {
2282                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
2283                 res = new_rd_And(db, blk,
2284                         new_r_Proj(low, mode_b, pnc),
2285                         new_r_Proj(high, mode_b, pnc),
2286                         mode_b);
2287         } else if (pnc == pn_Cmp_Lg) {
2288                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
2289                 res = new_rd_Or(db, blk,
2290                         new_r_Proj(low, mode_b, pnc),
2291                         new_r_Proj(high, mode_b, pnc),
2292                         mode_b);
2293         } else {
2294                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
2295                 t = new_rd_And(db, blk,
2296                         new_r_Proj(low, mode_b, pnc),
2297                         new_r_Proj(high, mode_b, pn_Cmp_Eq),
2298                         mode_b);
2299                 res = new_rd_Or(db, blk,
2300                         new_r_Proj(high, mode_b, pnc & ~pn_Cmp_Eq),
2301                         t,
2302                         mode_b);
2303         }  /* if */
2304         return res;
2305 }  /* lower_boolean_Proj_Cmp */
2306
2307 /**
2308  * The type of a lower function.
2309  *
2310  * @param node   the node to be lowered
2311  * @param mode   the low mode for the destination node
2312  * @param env    the lower environment
2313  */
2314 typedef void (*lower_func)(ir_node *node, ir_mode *mode, lower_env_t *env);
2315
2316 /**
2317  * Lower a node.
2318  */
2319 static void lower_ops(ir_node *node, void *env)
2320 {
2321         lower_env_t  *lenv = env;
2322         node_entry_t *entry;
2323         int          idx = get_irn_idx(node);
2324         ir_mode      *mode = get_irn_mode(node);
2325
2326         if (mode == mode_b || is_Mux(node) || is_Conv(node)) {
2327                 int i;
2328
2329                 for (i = get_irn_arity(node) - 1; i >= 0; --i) {
2330                         ir_node *proj = get_irn_n(node, i);
2331
2332                         if (is_Proj(proj)) {
2333                                 ir_node *cmp = get_Proj_pred(proj);
2334
2335                                 if (is_Cmp(cmp)) {
2336                                         ir_node *arg = get_Cmp_left(cmp);
2337
2338                                         mode = get_irn_mode(arg);
2339                                         if (mode == lenv->high_signed ||
2340                                                 mode == lenv->high_unsigned) {
2341                                                 ir_node *res = lower_boolean_Proj_Cmp(proj, cmp, lenv);
2342
2343                                                 if (res == NULL) {
2344                                                         /* could not lower because predecessors not ready */
2345                                                         waitq_put(lenv->waitq, node);
2346                                                         return;
2347                                                 }  /* if */
2348                                                 set_irn_n(node, i, res);
2349                                         }  /* if */
2350                                 }  /* if */
2351                         }  /* if */
2352                 }  /* for */
2353         }  /* if */
2354
2355         entry = idx < lenv->n_entries ? lenv->entries[idx] : NULL;
2356         if (entry || always_lower(get_irn_opcode(node))) {
2357                 ir_op      *op = get_irn_op(node);
2358                 lower_func func = (lower_func)op->ops.generic;
2359
2360                 if (func) {
2361                         mode = get_irn_op_mode(node);
2362
2363                         if (mode == lenv->high_signed)
2364                                 mode = lenv->low_signed;
2365                         else
2366                                 mode = lenv->low_unsigned;
2367
2368                         DB((dbg, LEVEL_1, "  %+F\n", node));
2369                         func(node, mode, lenv);
2370                 }  /* if */
2371         }  /* if */
2372 }  /* lower_ops */
2373
2374 #define IDENT(s)  new_id_from_chars(s, sizeof(s)-1)
2375
2376 /**
2377  * Compare two op_mode_entry_t's.
2378  */
2379 static int cmp_op_mode(const void *elt, const void *key, size_t size)
2380 {
2381         const op_mode_entry_t *e1 = elt;
2382         const op_mode_entry_t *e2 = key;
2383         (void) size;
2384
2385         return (e1->op - e2->op) | (e1->imode - e2->imode) | (e1->omode - e2->omode);
2386 }  /* cmp_op_mode */
2387
2388 /**
2389  * Compare two conv_tp_entry_t's.
2390  */
2391 static int cmp_conv_tp(const void *elt, const void *key, size_t size)
2392 {
2393         const conv_tp_entry_t *e1 = elt;
2394         const conv_tp_entry_t *e2 = key;
2395         (void) size;
2396
2397         return (e1->imode - e2->imode) | (e1->omode - e2->omode);
2398 }  /* cmp_conv_tp */
2399
2400 /**
2401  * Enter a lowering function into an ir_op.
2402  */
2403 static void enter_lower_func(ir_op *op, lower_func func)
2404 {
2405         op->ops.generic = (op_func)func;
2406 }  /* enter_lower_func */
2407
2408 /**
2409  * Returns non-zero if a method type must be lowered.
2410  *
2411  * @param mtp  the method type
2412  */
2413 static int mtp_must_be_lowered(ir_type *mtp, lower_env_t *env)
2414 {
2415         int i, n_params;
2416
2417         n_params = get_method_n_params(mtp);
2418         if (n_params <= 0)
2419                 return 0;
2420
2421         /* first check if we have parameters that must be fixed */
2422         for (i = 0; i < n_params; ++i) {
2423                 ir_type *tp = get_method_param_type(mtp, i);
2424
2425                 if (is_Primitive_type(tp)) {
2426                         ir_mode *mode = get_type_mode(tp);
2427
2428                         if (mode == env->high_signed ||
2429                                 mode == env->high_unsigned)
2430                                 return 1;
2431                 }  /* if */
2432         }  /* for */
2433         return 0;
2434 }
2435
2436 static void setup_modes(lower_env_t *env)
2437 {
2438         unsigned           size_bits           = env->params->doubleword_size;
2439         ir_mode           *doubleword_signed   = NULL;
2440         ir_mode           *doubleword_unsigned = NULL;
2441         int                n_modes             = get_irp_n_modes();
2442         ir_mode_arithmetic arithmetic;
2443         unsigned           modulo_shift;
2444         int                i;
2445
2446         /* search for doubleword modes... */
2447         for (i = 0; i < n_modes; ++i) {
2448                 ir_mode *mode = get_irp_mode(i);
2449                 if (!mode_is_int(mode))
2450                         continue;
2451                 if (get_mode_size_bits(mode) != size_bits)
2452                         continue;
2453                 if (mode_is_signed(mode)) {
2454                         if (doubleword_signed != NULL) {
2455                                 /* sigh - the lowerer should really just lower all mode with
2456                                  * size_bits it finds. Unfortunately this required a bigger
2457                                  * rewrite. */
2458                                 panic("multiple double word signed modes found");
2459                         }
2460                         doubleword_signed = mode;
2461                 } else {
2462                         if (doubleword_unsigned != NULL) {
2463                                 /* sigh - the lowerer should really just lower all mode with
2464                                  * size_bits it finds. Unfortunately this required a bigger
2465                                  * rewrite. */
2466                                 panic("multiple double word unsigned modes found");
2467                         }
2468                         doubleword_unsigned = mode;
2469                 }
2470         }
2471         if (doubleword_signed == NULL || doubleword_unsigned == NULL) {
2472                 panic("Couldn't find doubleword modes");
2473         }
2474
2475         arithmetic   = get_mode_arithmetic(doubleword_signed);
2476         modulo_shift = get_mode_modulo_shift(doubleword_signed);
2477
2478         assert(get_mode_size_bits(doubleword_unsigned) == size_bits);
2479         assert(size_bits % 2 == 0);
2480         assert(get_mode_sign(doubleword_signed) == 1);
2481         assert(get_mode_sign(doubleword_unsigned) == 0);
2482         assert(get_mode_sort(doubleword_signed) == irms_int_number);
2483         assert(get_mode_sort(doubleword_unsigned) == irms_int_number);
2484         assert(get_mode_arithmetic(doubleword_unsigned) == arithmetic);
2485         assert(get_mode_modulo_shift(doubleword_unsigned) == modulo_shift);
2486
2487         /* try to guess a sensible modulo shift for the new mode.
2488          * (This is IMO another indication that this should really be a node
2489          *  attribute instead of a mode thing) */
2490         if (modulo_shift == size_bits) {
2491                 modulo_shift = modulo_shift / 2;
2492         } else if (modulo_shift == 0) {
2493                 /* fine */
2494         } else {
2495                 panic("Don't know what new modulo shift to use for lowered doubleword mode");
2496         }
2497         size_bits /= 2;
2498
2499         /* produce lowered modes */
2500         env->high_signed   = doubleword_signed;
2501         env->high_unsigned = doubleword_unsigned;
2502         env->low_signed    = new_ir_mode("WS", irms_int_number, size_bits, 1,
2503                                          arithmetic, modulo_shift);
2504         env->low_unsigned  = new_ir_mode("WU", irms_int_number, size_bits, 0,
2505                                          arithmetic, modulo_shift);
2506 }
2507
2508 /*
2509  * Do the lowering.
2510  */
2511 void lower_dw_ops(const lwrdw_param_t *param)
2512 {
2513         lower_env_t lenv;
2514         int         i;
2515         ir_graph    *rem;
2516
2517         if (! param)
2518                 return;
2519
2520         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2521
2522         memset(&lenv, 0, sizeof(lenv));
2523         lenv.params = param;
2524         setup_modes(&lenv);
2525
2526         /* create the necessary maps */
2527         if (! intrinsic_fkt)
2528                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2529         if (! conv_types)
2530                 conv_types = new_set(cmp_conv_tp, 16);
2531         if (! lowered_type)
2532                 lowered_type = pmap_create();
2533
2534         /* create a primitive unsigned and signed type */
2535         if (! tp_u)
2536                 tp_u = get_type_for_mode(lenv.low_unsigned);
2537         if (! tp_s)
2538                 tp_s = get_type_for_mode(lenv.low_signed);
2539
2540         /* create method types for the created binop calls */
2541         if (! binop_tp_u) {
2542                 binop_tp_u = new_type_method(4, 2);
2543                 set_method_param_type(binop_tp_u, 0, tp_u);
2544                 set_method_param_type(binop_tp_u, 1, tp_u);
2545                 set_method_param_type(binop_tp_u, 2, tp_u);
2546                 set_method_param_type(binop_tp_u, 3, tp_u);
2547                 set_method_res_type(binop_tp_u, 0, tp_u);
2548                 set_method_res_type(binop_tp_u, 1, tp_u);
2549         }  /* if */
2550         if (! binop_tp_s) {
2551                 binop_tp_s = new_type_method(4, 2);
2552                 set_method_param_type(binop_tp_s, 0, tp_u);
2553                 set_method_param_type(binop_tp_s, 1, tp_s);
2554                 set_method_param_type(binop_tp_s, 2, tp_u);
2555                 set_method_param_type(binop_tp_s, 3, tp_s);
2556                 set_method_res_type(binop_tp_s, 0, tp_u);
2557                 set_method_res_type(binop_tp_s, 1, tp_s);
2558         }  /* if */
2559         if (! shiftop_tp_u) {
2560                 shiftop_tp_u = new_type_method(3, 2);
2561                 set_method_param_type(shiftop_tp_u, 0, tp_u);
2562                 set_method_param_type(shiftop_tp_u, 1, tp_u);
2563                 set_method_param_type(shiftop_tp_u, 2, tp_u);
2564                 set_method_res_type(shiftop_tp_u, 0, tp_u);
2565                 set_method_res_type(shiftop_tp_u, 1, tp_u);
2566         }  /* if */
2567         if (! shiftop_tp_s) {
2568                 shiftop_tp_s = new_type_method(3, 2);
2569                 set_method_param_type(shiftop_tp_s, 0, tp_u);
2570                 set_method_param_type(shiftop_tp_s, 1, tp_s);
2571                 set_method_param_type(shiftop_tp_s, 2, tp_u);
2572                 set_method_res_type(shiftop_tp_s, 0, tp_u);
2573                 set_method_res_type(shiftop_tp_s, 1, tp_s);
2574         }  /* if */
2575         if (! unop_tp_u) {
2576                 unop_tp_u = new_type_method(2, 2);
2577                 set_method_param_type(unop_tp_u, 0, tp_u);
2578                 set_method_param_type(unop_tp_u, 1, tp_u);
2579                 set_method_res_type(unop_tp_u, 0, tp_u);
2580                 set_method_res_type(unop_tp_u, 1, tp_u);
2581         }  /* if */
2582         if (! unop_tp_s) {
2583                 unop_tp_s = new_type_method(2, 2);
2584                 set_method_param_type(unop_tp_s, 0, tp_u);
2585                 set_method_param_type(unop_tp_s, 1, tp_s);
2586                 set_method_res_type(unop_tp_s, 0, tp_u);
2587                 set_method_res_type(unop_tp_s, 1, tp_s);
2588         }  /* if */
2589
2590         lenv.tv_mode_bytes = new_tarval_from_long(param->doubleword_size/(2*8), lenv.low_unsigned);
2591         lenv.tv_mode_bits  = new_tarval_from_long(param->doubleword_size/2, lenv.low_unsigned);
2592         lenv.waitq         = new_pdeq();
2593         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
2594         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
2595
2596         /* first clear the generic function pointer for all ops */
2597         clear_irp_opcodes_generic_func();
2598
2599 #define LOWER2(op, fkt)   enter_lower_func(op_##op, fkt)
2600 #define LOWER(op)         LOWER2(op, lower_##op)
2601 #define LOWER_BIN(op)     LOWER2(op, lower_Binop)
2602 #define LOWER_UN(op)      LOWER2(op, lower_Unop)
2603
2604         /* the table of all operations that must be lowered follows */
2605         LOWER(ASM);
2606         LOWER(Load);
2607         LOWER(Store);
2608         LOWER(Const);
2609         LOWER(And);
2610         LOWER(Or);
2611         LOWER(Eor);
2612         LOWER(Not);
2613         LOWER(Cond);
2614         LOWER(Return);
2615         LOWER(Call);
2616         LOWER(Unknown);
2617         LOWER(Phi);
2618         LOWER(Mux);
2619         LOWER(Start);
2620
2621         LOWER_BIN(Add);
2622         LOWER_BIN(Sub);
2623         LOWER_BIN(Mul);
2624         LOWER(Shl);
2625         LOWER(Shr);
2626         LOWER(Shrs);
2627         LOWER(Rotl);
2628         LOWER(DivMod);
2629         LOWER(Div);
2630         LOWER(Mod);
2631         LOWER(Sel);
2632         LOWER_UN(Minus);
2633
2634         LOWER(Conv);
2635
2636 #undef LOWER_UN
2637 #undef LOWER_BIN
2638 #undef LOWER
2639 #undef LOWER2
2640
2641         /* transform all graphs */
2642         rem = current_ir_graph;
2643         for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
2644                 ir_graph  *irg = get_irp_irg(i);
2645                 ir_entity *ent;
2646                 ir_type   *mtp;
2647                 int n_idx;
2648
2649                 obstack_init(&lenv.obst);
2650
2651                 n_idx = get_irg_last_idx(irg);
2652                 n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2653                 lenv.n_entries = n_idx;
2654                 lenv.entries   = NEW_ARR_F(node_entry_t *, n_idx);
2655                 memset(lenv.entries, 0, n_idx * sizeof(lenv.entries[0]));
2656
2657                 lenv.l_mtp        = NULL;
2658                 lenv.flags        = 0;
2659                 lenv.proj_2_block = pmap_create();
2660                 lenv.value_param_tp = NULL;
2661                 ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2662
2663                 ent = get_irg_entity(irg);
2664                 mtp = get_entity_type(ent);
2665
2666                 if (mtp_must_be_lowered(mtp, &lenv)) {
2667                         ir_type *ltp = lower_mtp(mtp, &lenv);
2668                         lenv.flags |= MUST_BE_LOWERED;
2669                         set_entity_type(ent, ltp);
2670                         lenv.l_mtp = ltp;
2671                         lenv.value_param_tp = get_method_value_param_type(mtp);
2672                 }  /* if */
2673
2674                 /* first step: link all nodes and allocate data */
2675                 irg_walk_graph(irg, firm_clear_node_and_phi_links, prepare_links_and_handle_rotl, &lenv);
2676
2677                 if (lenv.flags & MUST_BE_LOWERED) {
2678                         DB((dbg, LEVEL_1, "Lowering graph %+F\n", irg));
2679
2680                         /* must do some work */
2681                         irg_walk_graph(irg, NULL, lower_ops, &lenv);
2682
2683                         /* last step: all waiting nodes */
2684                         DB((dbg, LEVEL_1, "finishing waiting nodes:\n"));
2685                         current_ir_graph = irg;
2686                         while (! pdeq_empty(lenv.waitq)) {
2687                                 ir_node *node = pdeq_getl(lenv.waitq);
2688
2689                                 lower_ops(node, &lenv);
2690                         }  /* while */
2691
2692                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2693
2694                         /* outs are invalid, we changed the graph */
2695                         set_irg_outs_inconsistent(irg);
2696
2697                         if (lenv.flags & CF_CHANGED) {
2698                                 /* control flow changed, dominance info is invalid */
2699                                 set_irg_doms_inconsistent(irg);
2700                                 set_irg_extblk_inconsistent(irg);
2701                                 set_irg_loopinfo_inconsistent(irg);
2702                         }  /* if */
2703                 } else {
2704                         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2705                 }  /* if */
2706                 pmap_destroy(lenv.proj_2_block);
2707                 DEL_ARR_F(lenv.entries);
2708                 obstack_free(&lenv.obst, NULL);
2709         }  /* for */
2710         del_pdeq(lenv.waitq);
2711         current_ir_graph = rem;
2712 }  /* lower_dw_ops */
2713
2714 /* Default implementation. */
2715 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2716                                     const ir_mode *imode, const ir_mode *omode,
2717                                     void *context)
2718 {
2719         char buf[64];
2720         ident *id;
2721         ir_entity *ent;
2722         (void) context;
2723
2724         if (imode == omode) {
2725                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2726         } else {
2727                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2728                         get_mode_name(imode), get_mode_name(omode));
2729         }  /* if */
2730         id = new_id_from_str(buf);
2731
2732         ent = new_entity(get_glob_type(), id, method);
2733         set_entity_ld_ident(ent, get_entity_ident(ent));
2734         return ent;
2735 }  /* def_create_intrinsic_fkt */