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

   1 /*
   2  * Copyright (C) 1995-2011 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, i.e. 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 <stdbool.h>
  32 #include <assert.h>
  33
  34 #include "error.h"
  35 #include "lowering.h"
  36 #include "irnode_t.h"
  37 #include "irgraph_t.h"
  38 #include "irmode_t.h"
  39 #include "iropt_t.h"
  40 #include "irgmod.h"
  41 #include "tv_t.h"
  42 #include "dbginfo_t.h"
  43 #include "iropt_dbg.h"
  44 #include "irflag_t.h"
  45 #include "firmstat.h"
  46 #include "irgwalk.h"
  47 #include "ircons.h"
  48 #include "irflag.h"
  49 #include "irtools.h"
  50 #include "debug.h"
  51 #include "set.h"
  52 #include "pmap.h"
  53 #include "pdeq.h"
  54 #include "irdump.h"
  55 #include "array_t.h"
  56 #include "irpass_t.h"
  57 #include "lower_dw.h"
  58
  59 /** A map from (op, imode, omode) to Intrinsic functions entities. */
  60 static set *intrinsic_fkt;
  61
  62 /** A map from (imode, omode) to conv function types. */
  63 static set *conv_types;
  64
  65 /** A map from a method type to its lowered type. */
  66 static pmap *lowered_type;
  67
  68 /** The types for the binop and unop intrinsics. */
  69 static ir_type *binop_tp_u, *binop_tp_s, *unop_tp_u, *unop_tp_s, *tp_s, *tp_u;
  70
  71 /** the debug handle */
  72 DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
  73
  74 /**
  75  * An entry in the (op, imode, omode) -> entity map.
  76  */
  77 typedef struct op_mode_entry {
  78         const ir_op   *op;    /**< the op */
  79         const ir_mode *imode; /**< the input mode */
  80         const ir_mode *omode; /**< the output mode */
  81         ir_entity     *ent;   /**< the associated entity of this (op, imode, omode) triple */
  82 } op_mode_entry_t;
  83
  84 /**
  85  * An entry in the (imode, omode) -> tp map.
  86  */
  87 typedef struct conv_tp_entry {
  88         const ir_mode *imode; /**< the input mode */
  89         const ir_mode *omode; /**< the output mode */
  90         ir_type       *mtd;   /**< the associated method type of this (imode, omode) pair */
  91 } conv_tp_entry_t;
  92
  93 enum lower_flags {
  94         MUST_BE_LOWERED = 1,  /**< graph must be lowered */
  95         CF_CHANGED      = 2,  /**< control flow was changed */
  96 };
  97
  98 /**
  99  * The lower environment.
 100  */
 101 typedef struct lower_dw_env_t {
 102         lower64_entry_t **entries;     /**< entries per node */
 103         ir_graph      *irg;
 104         struct obstack obst;           /**< an obstack holding the temporary data */
 105         ir_type   *l_mtp;              /**< lowered method type of the current method */
 106         ir_tarval *tv_mode_bytes;      /**< a tarval containing the number of bytes in the lowered modes */
 107         ir_tarval *tv_mode_bits;       /**< a tarval containing the number of bits in the lowered modes */
 108         pdeq      *waitq;              /**< a wait queue of all nodes that must be handled later */
 109         ir_node  **lowered_phis;       /**< list of lowered phis */
 110         ir_mode   *high_signed;        /**< doubleword signed type */
 111         ir_mode   *high_unsigned;      /**< doubleword unsigned type */
 112         ir_mode   *low_signed;         /**< word signed type */
 113         ir_mode   *low_unsigned;       /**< word unsigned type */
 114         ident     *first_id;           /**< .l for little and .h for big endian */
 115         ident     *next_id;            /**< .h for little and .l for big endian */
 116         const lwrdw_param_t *params;   /**< transformation parameter */
 117         unsigned flags;                /**< some flags */
 118         unsigned n_entries;            /**< number of entries */
 119         ir_type  *value_param_tp;      /**< the old value param type */
 120 } lower_dw_env_t;
 121
 122 static lower_dw_env_t *env;
 123
 124 static void lower_node(ir_node *node);
 125 static bool mtp_must_be_lowered(ir_type *mtp);
 126
 127 /**
 128  * Create a method type for a Conv emulation from imode to omode.
 129  */
 130 static ir_type *get_conv_type(ir_mode *imode, ir_mode *omode)
 131 {
 132         conv_tp_entry_t key, *entry;
 133         ir_type *mtd;
 134
 135         key.imode = imode;
 136         key.omode = omode;
 137         key.mtd   = NULL;
 138
 139         entry = (conv_tp_entry_t*)set_insert(conv_types, &key, sizeof(key), HASH_PTR(imode) ^ HASH_PTR(omode));
 140         if (! entry->mtd) {
 141                 int n_param = 1, n_res = 1;
 142
 143                 if (imode == env->high_signed || imode == env->high_unsigned)
 144                         n_param = 2;
 145                 if (omode == env->high_signed || omode == env->high_unsigned)
 146                         n_res = 2;
 147
 148                 /* create a new one */
 149                 mtd = new_type_method(n_param, n_res);
 150
 151                 /* set param types and result types */
 152                 n_param = 0;
 153                 if (imode == env->high_signed) {
 154                         set_method_param_type(mtd, n_param++, tp_u);
 155                         set_method_param_type(mtd, n_param++, tp_s);
 156                 } else if (imode == env->high_unsigned) {
 157                         set_method_param_type(mtd, n_param++, tp_u);
 158                         set_method_param_type(mtd, n_param++, tp_u);
 159                 } else {
 160                         ir_type *tp = get_type_for_mode(imode);
 161                         set_method_param_type(mtd, n_param++, tp);
 162                 }
 163
 164                 n_res = 0;
 165                 if (omode == env->high_signed) {
 166                         set_method_res_type(mtd, n_res++, tp_u);
 167                         set_method_res_type(mtd, n_res++, tp_s);
 168                 } else if (omode == env->high_unsigned) {
 169                         set_method_res_type(mtd, n_res++, tp_u);
 170                         set_method_res_type(mtd, n_res++, tp_u);
 171                 } else {
 172                         ir_type *tp = get_type_for_mode(omode);
 173                         set_method_res_type(mtd, n_res++, tp);
 174                 }
 175                 entry->mtd = mtd;
 176         } else {
 177                 mtd = entry->mtd;
 178         }
 179         return mtd;
 180 }
 181
 182 /**
 183  * Add an additional control flow input to a block.
 184  * Patch all Phi nodes. The new Phi inputs are copied from
 185  * old input number nr.
 186  */
 187 static void add_block_cf_input_nr(ir_node *block, int nr, ir_node *cf)
 188 {
 189         int i, arity = get_irn_arity(block);
 190         ir_node **in;
 191         const ir_edge_t *edge;
 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         foreach_out_edge(block, edge) {
 203                 ir_node *phi = get_edge_src_irn(edge);
 204                 if (!is_Phi(phi))
 205                         continue;
 206
 207                 for (i = 0; i < arity; ++i)
 208                         in[i] = get_irn_n(phi, i);
 209                 in[i] = in[nr];
 210                 set_irn_in(phi, i + 1, in);
 211         }
 212 }
 213
 214 /**
 215  * Add an additional control flow input to a block.
 216  * Patch all Phi nodes. The new Phi inputs are copied from
 217  * old input from cf tmpl.
 218  */
 219 static void add_block_cf_input(ir_node *block, ir_node *tmpl, ir_node *cf)
 220 {
 221         int i, arity = get_irn_arity(block);
 222         int nr = 0;
 223
 224         for (i = 0; i < arity; ++i) {
 225                 if (get_irn_n(block, i) == tmpl) {
 226                         nr = i;
 227                         break;
 228                 }
 229         }
 230         assert(i < arity);
 231         add_block_cf_input_nr(block, nr, cf);
 232 }
 233
 234 /**
 235  * Return the "operational" mode of a Firm node.
 236  */
 237 static ir_mode *get_irn_op_mode(ir_node *node)
 238 {
 239         switch (get_irn_opcode(node)) {
 240         case iro_Load:
 241                 return get_Load_mode(node);
 242         case iro_Store:
 243                 return get_irn_mode(get_Store_value(node));
 244         case iro_Div:
 245                 return get_irn_mode(get_Div_left(node));
 246         case iro_Mod:
 247                 return get_irn_mode(get_Mod_left(node));
 248         case iro_Cmp:
 249                 return get_irn_mode(get_Cmp_left(node));
 250         default:
 251                 return get_irn_mode(node);
 252         }
 253 }
 254
 255 /**
 256  * Walker, prepare the node links and determine which nodes need to be lowered
 257  * at all.
 258  */
 259 static void prepare_links(ir_node *node)
 260 {
 261         ir_mode         *mode = get_irn_op_mode(node);
 262         lower64_entry_t *link;
 263
 264         if (mode == env->high_signed || mode == env->high_unsigned) {
 265                 unsigned idx = get_irn_idx(node);
 266                 /* ok, found a node that will be lowered */
 267                 link = OALLOCZ(&env->obst, lower64_entry_t);
 268
 269                 if (idx >= env->n_entries) {
 270                         /* enlarge: this happens only for Rotl nodes which is RARELY */
 271                         unsigned old   = env->n_entries;
 272                         unsigned n_idx = idx + (idx >> 3);
 273
 274                         ARR_RESIZE(lower64_entry_t *, env->entries, n_idx);
 275                         memset(&env->entries[old], 0, (n_idx - old) * sizeof(env->entries[0]));
 276                         env->n_entries = n_idx;
 277                 }
 278                 env->entries[idx] = link;
 279                 env->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 == env->high_signed || mode == env->high_unsigned) {
 286                         /* must lower this node either but don't need a link */
 287                         env->flags |= MUST_BE_LOWERED;
 288                 }
 289                 return;
 290         }
 291 }
 292
 293 lower64_entry_t *get_node_entry(ir_node *node)
 294 {
 295         unsigned idx = get_irn_idx(node);
 296         assert(idx < env->n_entries);
 297         return env->entries[idx];
 298 }
 299
 300 void ir_set_dw_lowered(ir_node *old, ir_node *new_low, ir_node *new_high)
 301 {
 302         lower64_entry_t *entry = get_node_entry(old);
 303         entry->low_word  = new_low;
 304         entry->high_word = new_high;
 305 }
 306
 307 ir_mode *ir_get_low_unsigned_mode(void)
 308 {
 309         return env->low_unsigned;
 310 }
 311
 312 /**
 313  * Translate a Constant: create two.
 314  */
 315 static void lower_Const(ir_node *node, ir_mode *mode)
 316 {
 317         ir_graph  *irg      = get_irn_irg(node);
 318         dbg_info  *dbg      = get_irn_dbg_info(node);
 319         ir_mode   *low_mode = env->low_unsigned;
 320         ir_tarval *tv       = get_Const_tarval(node);
 321         ir_tarval *tv_l     = tarval_convert_to(tv, low_mode);
 322         ir_node   *res_low  = new_rd_Const(dbg, irg, tv_l);
 323         ir_tarval *tv_shrs  = tarval_shrs(tv, env->tv_mode_bits);
 324         ir_tarval *tv_h     = tarval_convert_to(tv_shrs, mode);
 325         ir_node   *res_high = new_rd_Const(dbg, irg, tv_h);
 326
 327         ir_set_dw_lowered(node, res_low, res_high);
 328 }
 329
 330 /**
 331  * Translate a Load: create two.
 332  */
 333 static void lower_Load(ir_node *node, ir_mode *mode)
 334 {
 335         ir_mode    *low_mode = env->low_unsigned;
 336         ir_graph   *irg = get_irn_irg(node);
 337         ir_node    *adr = get_Load_ptr(node);
 338         ir_node    *mem = get_Load_mem(node);
 339         ir_node    *low;
 340         ir_node    *high;
 341         ir_node    *proj_m;
 342         dbg_info   *dbg;
 343         ir_node    *block = get_nodes_block(node);
 344         ir_cons_flags volatility = get_Load_volatility(node) == volatility_is_volatile
 345                                  ? cons_volatile : cons_none;
 346         const ir_edge_t *edge;
 347         const ir_edge_t *next;
 348
 349         if (env->params->little_endian) {
 350                 low  = adr;
 351                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 352         } else {
 353                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 354                 high = adr;
 355         }
 356
 357         /* create two loads */
 358         dbg    = get_irn_dbg_info(node);
 359         low    = new_rd_Load(dbg, block, mem,  low,  low_mode, volatility);
 360         proj_m = new_r_Proj(low, mode_M, pn_Load_M);
 361         high   = new_rd_Load(dbg, block, proj_m, high, mode, volatility);
 362
 363         foreach_out_edge_safe(node, edge, next) {
 364                 ir_node *proj = get_edge_src_irn(edge);
 365                 if (!is_Proj(proj))
 366                         continue;
 367
 368                 switch (get_Proj_proj(proj)) {
 369                 case pn_Load_M:         /* Memory result. */
 370                         /* put it to the second one */
 371                         set_Proj_pred(proj, high);
 372                         break;
 373                 case pn_Load_X_except:  /* Execution result if exception occurred. */
 374                         /* put it to the first one */
 375                         set_Proj_pred(proj, low);
 376                         break;
 377                 case pn_Load_res: {       /* Result of load operation. */
 378                         ir_node *res_low  = new_r_Proj(low,  low_mode, pn_Load_res);
 379                         ir_node *res_high = new_r_Proj(high, mode,     pn_Load_res);
 380                         ir_set_dw_lowered(proj, res_low, res_high);
 381                         break;
 382                 }
 383                 default:
 384                         assert(0 && "unexpected Proj number");
 385                 }
 386                 /* mark this proj: we have handled it already, otherwise we might fall
 387                  * into out new nodes. */
 388                 mark_irn_visited(proj);
 389         }
 390 }
 391
 392 /**
 393  * Translate a Store: create two.
 394  */
 395 static void lower_Store(ir_node *node, ir_mode *mode)
 396 {
 397         ir_graph              *irg;
 398         ir_node               *block, *adr, *mem;
 399         ir_node               *low, *high, *proj_m;
 400         dbg_info              *dbg;
 401         ir_node               *value = get_Store_value(node);
 402         const lower64_entry_t *entry = get_node_entry(value);
 403         ir_cons_flags volatility = get_Store_volatility(node) == volatility_is_volatile
 404                                    ? cons_volatile : cons_none;
 405         const ir_edge_t *edge;
 406         const ir_edge_t *next;
 407         (void) mode;
 408
 409         assert(entry);
 410
 411         if (! entry->low_word) {
 412                 /* not ready yet, wait */
 413                 pdeq_putr(env->waitq, node);
 414                 return;
 415         }
 416
 417         irg = get_irn_irg(node);
 418         adr = get_Store_ptr(node);
 419         mem = get_Store_mem(node);
 420         block = get_nodes_block(node);
 421
 422         if (env->params->little_endian) {
 423                 low  = adr;
 424                 high = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 425         } else {
 426                 low  = new_r_Add(block, adr, new_r_Const(irg, env->tv_mode_bytes), get_irn_mode(adr));
 427                 high = adr;
 428         }
 429
 430         /* create two Stores */
 431         dbg    = get_irn_dbg_info(node);
 432         low    = new_rd_Store(dbg, block, mem, low,  entry->low_word, volatility);
 433         proj_m = new_r_Proj(low, mode_M, pn_Store_M);
 434         high   = new_rd_Store(dbg, block, proj_m, high, entry->high_word, volatility);
 435
 436         foreach_out_edge_safe(node, edge, next) {
 437                 ir_node *proj = get_edge_src_irn(edge);
 438                 if (!is_Proj(proj))
 439                         continue;
 440
 441                 switch (get_Proj_proj(proj)) {
 442                 case pn_Store_M:         /* Memory result. */
 443                         /* put it to the second one */
 444                         set_Proj_pred(proj, high);
 445                         break;
 446                 case pn_Store_X_except:  /* Execution result if exception occurred. */
 447                         /* put it to the first one */
 448                         set_Proj_pred(proj, low);
 449                         break;
 450                 default:
 451                         assert(0 && "unexpected Proj number");
 452                 }
 453                 /* mark this proj: we have handled it already, otherwise we might fall into
 454                  * out new nodes. */
 455                 mark_irn_visited(proj);
 456         }
 457 }
 458
 459 /**
 460  * Return a node containing the address of the intrinsic emulation function.
 461  *
 462  * @param method  the method type of the emulation function
 463  * @param op      the emulated ir_op
 464  * @param imode   the input mode of the emulated opcode
 465  * @param omode   the output mode of the emulated opcode
 466  * @param env     the lower environment
 467  */
 468 static ir_node *get_intrinsic_address(ir_type *method, ir_op *op,
 469                                       ir_mode *imode, ir_mode *omode)
 470 {
 471         symconst_symbol sym;
 472         ir_entity *ent;
 473         op_mode_entry_t key, *entry;
 474
 475         key.op    = op;
 476         key.imode = imode;
 477         key.omode = omode;
 478         key.ent   = NULL;
 479
 480         entry = (op_mode_entry_t*)set_insert(intrinsic_fkt, &key, sizeof(key),
 481                                 HASH_PTR(op) ^ HASH_PTR(imode) ^ (HASH_PTR(omode) << 8));
 482         if (! entry->ent) {
 483                 /* create a new one */
 484                 ent = env->params->create_intrinsic(method, op, imode, omode, env->params->ctx);
 485
 486                 assert(ent && "Intrinsic creator must return an entity");
 487                 entry->ent = ent;
 488         } else {
 489                 ent = entry->ent;
 490         }
 491         sym.entity_p = ent;
 492         return new_r_SymConst(env->irg, mode_P_code, sym, symconst_addr_ent);
 493 }
 494
 495 /**
 496  * Translate a Div.
 497  *
 498  * Create an intrinsic Call.
 499  */
 500 static void lower_Div(ir_node *node, ir_mode *mode)
 501 {
 502         ir_node         *left   = get_Div_left(node);
 503         ir_node         *right  = get_Div_right(node);
 504         ir_node         *block  = get_nodes_block(node);
 505         dbg_info        *dbgi   = get_irn_dbg_info(node);
 506         ir_type         *mtp    = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 507         ir_mode         *opmode = get_irn_op_mode(node);
 508         ir_node         *addr
 509             = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode);
 510         ir_node         *in[4];
 511         ir_node         *call;
 512         ir_node         *resproj;
 513         const ir_edge_t *edge;
 514         const ir_edge_t *next;
 515
 516         if (env->params->little_endian) {
 517                 in[0] = get_lowered_low(left);
 518                 in[1] = get_lowered_high(left);
 519                 in[2] = get_lowered_low(right);
 520                 in[3] = get_lowered_high(right);
 521         } else {
 522                 in[0] = get_lowered_high(left);
 523                 in[1] = get_lowered_low(left);
 524                 in[2] = get_lowered_high(right);
 525                 in[3] = get_lowered_low(right);
 526         }
 527         call    = new_rd_Call(dbgi, block, get_Div_mem(node), addr, 4, in, mtp);
 528         resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
 529         set_irn_pinned(call, get_irn_pinned(node));
 530
 531         foreach_out_edge_safe(node, edge, next) {
 532                 ir_node *proj = get_edge_src_irn(edge);
 533                 if (!is_Proj(proj))
 534                         continue;
 535
 536                 switch (get_Proj_proj(proj)) {
 537                 case pn_Div_M:         /* Memory result. */
 538                         /* reroute to the call */
 539                         set_Proj_pred(proj, call);
 540                         set_Proj_proj(proj, pn_Call_M);
 541                         break;
 542                 case pn_Div_X_regular:
 543                         set_Proj_pred(proj, call);
 544                         set_Proj_proj(proj, pn_Call_X_regular);
 545                         break;
 546                 case pn_Div_X_except:
 547                         set_Proj_pred(proj, call);
 548                         set_Proj_proj(proj, pn_Call_X_except);
 549                         break;
 550                 case pn_Div_res:
 551                         if (env->params->little_endian) {
 552                                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 553                                 ir_node *res_high = new_r_Proj(resproj, mode,              1);
 554                                 ir_set_dw_lowered(proj, res_low, res_high);
 555                         } else {
 556                                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 1);
 557                                 ir_node *res_high = new_r_Proj(resproj, mode,              0);
 558                                 ir_set_dw_lowered(proj, res_low, res_high);
 559                         }
 560                         break;
 561                 default:
 562                         assert(0 && "unexpected Proj number");
 563                 }
 564                 /* mark this proj: we have handled it already, otherwise we might fall into
 565                  * out new nodes. */
 566                 mark_irn_visited(proj);
 567         }
 568 }
 569
 570 /**
 571  * Translate a Mod.
 572  *
 573  * Create an intrinsic Call.
 574  */
 575 static void lower_Mod(ir_node *node, ir_mode *mode)
 576 {
 577         ir_node         *left   = get_Mod_left(node);
 578         ir_node         *right  = get_Mod_right(node);
 579         dbg_info        *dbgi   = get_irn_dbg_info(node);
 580         ir_node         *block  = get_nodes_block(node);
 581         ir_type         *mtp    = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 582         ir_mode         *opmode = get_irn_op_mode(node);
 583         ir_node         *addr
 584             = get_intrinsic_address(mtp, get_irn_op(node), opmode, opmode);
 585         ir_node         *in[4];
 586         ir_node         *call;
 587         ir_node         *resproj;
 588         const ir_edge_t *edge;
 589         const ir_edge_t *next;
 590
 591         if (env->params->little_endian) {
 592                 in[0] = get_lowered_low(left);
 593                 in[1] = get_lowered_high(left);
 594                 in[2] = get_lowered_low(right);
 595                 in[3] = get_lowered_high(right);
 596         } else {
 597                 in[0] = get_lowered_high(left);
 598                 in[1] = get_lowered_low(left);
 599                 in[2] = get_lowered_high(right);
 600                 in[3] = get_lowered_low(right);
 601         }
 602         call    = new_rd_Call(dbgi, block, get_Mod_mem(node), addr, 4, in, mtp);
 603         resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
 604         set_irn_pinned(call, get_irn_pinned(node));
 605
 606         foreach_out_edge_safe(node, edge, next) {
 607                 ir_node *proj = get_edge_src_irn(edge);
 608                 if (!is_Proj(proj))
 609                         continue;
 610
 611                 switch (get_Proj_proj(proj)) {
 612                 case pn_Mod_M:         /* Memory result. */
 613                         /* reroute to the call */
 614                         set_Proj_pred(proj, call);
 615                         set_Proj_proj(proj, pn_Call_M);
 616                         break;
 617                 case pn_Div_X_regular:
 618                         set_Proj_pred(proj, call);
 619                         set_Proj_proj(proj, pn_Call_X_regular);
 620                         break;
 621                 case pn_Mod_X_except:
 622                         set_Proj_pred(proj, call);
 623                         set_Proj_proj(proj, pn_Call_X_except);
 624                         break;
 625                 case pn_Mod_res:
 626                         if (env->params->little_endian) {
 627                                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 628                                 ir_node *res_high = new_r_Proj(resproj, mode,              1);
 629                                 ir_set_dw_lowered(proj, res_low, res_high);
 630                         } else {
 631                                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 1);
 632                                 ir_node *res_high = new_r_Proj(resproj, mode,              0);
 633                                 ir_set_dw_lowered(proj, res_low, res_high);
 634                         }
 635                         break;
 636                 default:
 637                         assert(0 && "unexpected Proj number");
 638                 }
 639                 /* mark this proj: we have handled it already, otherwise we might fall
 640                  * into out new nodes. */
 641                 mark_irn_visited(proj);
 642         }
 643 }
 644
 645 /**
 646  * Translate a binop.
 647  *
 648  * Create an intrinsic Call.
 649  */
 650 static void lower_binop(ir_node *node, ir_mode *mode)
 651 {
 652         ir_node  *left  = get_binop_left(node);
 653         ir_node  *right = get_binop_right(node);
 654         dbg_info *dbgi  = get_irn_dbg_info(node);
 655         ir_node  *block = get_nodes_block(node);
 656         ir_graph *irg   = get_irn_irg(block);
 657         ir_type  *mtp   = mode_is_signed(mode) ? binop_tp_s : binop_tp_u;
 658         ir_node  *addr  = get_intrinsic_address(mtp, get_irn_op(node), mode, mode);
 659         ir_node  *in[4];
 660         ir_node  *call;
 661         ir_node  *resproj;
 662
 663         if (env->params->little_endian) {
 664                 in[0] = get_lowered_low(left);
 665                 in[1] = get_lowered_high(left);
 666                 in[2] = get_lowered_low(right);
 667                 in[3] = get_lowered_high(right);
 668         } else {
 669                 in[0] = get_lowered_high(left);
 670                 in[1] = get_lowered_low(left);
 671                 in[2] = get_lowered_high(right);
 672                 in[3] = get_lowered_low(right);
 673         }
 674         call    = new_rd_Call(dbgi, block, get_irg_no_mem(irg), addr, 4, in, mtp);
 675         resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
 676         set_irn_pinned(call, get_irn_pinned(node));
 677
 678         if (env->params->little_endian) {
 679                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
 680                 ir_node *res_high = new_r_Proj(resproj, mode,              1);
 681                 ir_set_dw_lowered(node, res_low, res_high);
 682         } else {
 683                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 1);
 684                 ir_node *res_high = new_r_Proj(resproj, mode,              0);
 685                 ir_set_dw_lowered(node, res_low, res_high);
 686         }
 687 }
 688
 689 static ir_node *create_conv(ir_node *block, ir_node *node, ir_mode *dest_mode)
 690 {
 691         if (get_irn_mode(node) == dest_mode)
 692                 return node;
 693         return new_r_Conv(block, node, dest_mode);
 694 }
 695
 696 /**
 697  * Moves node and all predecessors of node from from_bl to to_bl.
 698  * Does not move predecessors of Phi nodes (or block nodes).
 699  */
 700 static void move(ir_node *node, ir_node *from_bl, ir_node *to_bl)
 701 {
 702         int i, arity;
 703
 704         /* move this node */
 705         set_nodes_block(node, to_bl);
 706
 707         /* move its Projs */
 708         if (get_irn_mode(node) == mode_T) {
 709                 const ir_edge_t *edge;
 710                 foreach_out_edge(node, edge) {
 711                         ir_node *proj = get_edge_src_irn(edge);
 712                         if (!is_Proj(proj))
 713                                 continue;
 714                         move(proj, from_bl, to_bl);
 715                 }
 716         }
 717
 718         /* We must not move predecessors of Phi nodes, even if they are in
 719          * from_bl. (because these are values from an earlier loop iteration
 720          * which are not predecessors of node here)
 721          */
 722         if (is_Phi(node))
 723                 return;
 724
 725         /* recursion ... */
 726         arity = get_irn_arity(node);
 727         for (i = 0; i < arity; i++) {
 728                 ir_node *pred      = get_irn_n(node, i);
 729                 ir_mode *pred_mode = get_irn_mode(pred);
 730                 if (get_nodes_block(pred) == from_bl)
 731                         move(pred, from_bl, to_bl);
 732                 if (pred_mode == env->high_signed || pred_mode == env->high_unsigned) {
 733                         ir_node *pred_low  = get_lowered_low(pred);
 734                         ir_node *pred_high = get_lowered_high(pred);
 735                         if (get_nodes_block(pred_low) == from_bl)
 736                                 move(pred_low, from_bl, to_bl);
 737                         if (pred_high != NULL && get_nodes_block(pred_high) == from_bl)
 738                                 move(pred_high, from_bl, to_bl);
 739                 }
 740         }
 741 }
 742
 743 /**
 744  * We need a custom version of part_block_edges because during transformation
 745  * not all data-dependencies are explicit yet if a lowered nodes users are not
 746  * lowered yet.
 747  * We can fix this by modifying move to look for such implicit dependencies.
 748  * Additionally we have to keep the proj_2_block map updated
 749  */
 750 static ir_node *part_block_dw(ir_node *node)
 751 {
 752         ir_graph *irg        = get_irn_irg(node);
 753         ir_node  *old_block  = get_nodes_block(node);
 754         int       n_cfgpreds = get_Block_n_cfgpreds(old_block);
 755         ir_node **cfgpreds   = get_Block_cfgpred_arr(old_block);
 756         ir_node  *new_block  = new_r_Block(irg, n_cfgpreds, cfgpreds);
 757         const ir_edge_t *edge;
 758         const ir_edge_t *next;
 759
 760         /* old_block has no predecessors anymore for now */
 761         set_irn_in(old_block, 0, NULL);
 762
 763         /* move node and its predecessors to new_block */
 764         move(node, old_block, new_block);
 765
 766         /* move Phi nodes to new_block */
 767         foreach_out_edge_safe(old_block, edge, next) {
 768                 ir_node *phi = get_edge_src_irn(edge);
 769                 if (!is_Phi(phi))
 770                         continue;
 771                 set_nodes_block(phi, new_block);
 772         }
 773         return old_block;
 774 }
 775
 776 typedef ir_node* (*new_rd_shr_func)(dbg_info *dbgi, ir_node *block,
 777                                     ir_node *left, ir_node *right,
 778                                     ir_mode *mode);
 779
 780 static void lower_shr_helper(ir_node *node, ir_mode *mode,
 781                              new_rd_shr_func new_rd_shrs)
 782 {
 783         ir_node  *right         = get_binop_right(node);
 784         ir_node  *left          = get_binop_left(node);
 785         ir_mode  *shr_mode      = get_irn_mode(node);
 786         unsigned  modulo_shift  = get_mode_modulo_shift(shr_mode);
 787         ir_mode  *low_unsigned  = env->low_unsigned;
 788         unsigned  modulo_shift2 = get_mode_modulo_shift(mode);
 789         ir_graph *irg           = get_irn_irg(node);
 790         ir_node  *left_low      = get_lowered_low(left);
 791         ir_node  *left_high     = get_lowered_high(left);
 792         dbg_info *dbgi          = get_irn_dbg_info(node);
 793         ir_node  *lower_block;
 794         ir_node  *block;
 795         ir_node  *cnst;
 796         ir_node  *and;
 797         ir_node  *cmp;
 798         ir_node  *cond;
 799         ir_node  *proj_true;
 800         ir_node  *proj_false;
 801         ir_node  *phi_low;
 802         ir_node  *phi_high;
 803         ir_node  *lower_in[2];
 804         ir_node  *phi_low_in[2];
 805         ir_node  *phi_high_in[2];
 806
 807         /* this version is optimized for modulo shift architectures
 808          * (and can't handle anything else) */
 809         if (modulo_shift != get_mode_size_bits(shr_mode)
 810                         || modulo_shift2<<1 != modulo_shift) {
 811                 panic("Shr lowering only implemented for modulo shift shr operations");
 812         }
 813         if (!is_po2(modulo_shift) || !is_po2(modulo_shift2)) {
 814                 panic("Shr lowering only implemented for power-of-2 modes");
 815         }
 816         /* without 2-complement the -x instead of (bit_width-x) trick won't work */
 817         if (get_mode_arithmetic(shr_mode) != irma_twos_complement) {
 818                 panic("Shr lowering only implemented for two-complement modes");
 819         }
 820
 821         block = get_nodes_block(node);
 822
 823         /* if the right operand is a 64bit value, we're only interested in the
 824          * lower word */
 825         if (get_irn_mode(right) == env->high_unsigned) {
 826                 right = get_lowered_low(right);
 827         } else {
 828                 /* shift should never have signed mode on the right */
 829                 assert(get_irn_mode(right) != env->high_signed);
 830                 right = create_conv(block, right, low_unsigned);
 831         }
 832
 833         lower_block = part_block_dw(node);
 834         env->flags |= CF_CHANGED;
 835         block = get_nodes_block(node);
 836
 837         /* add a Cmp to test if highest bit is set <=> whether we shift more
 838          * than half the word width */
 839         cnst       = new_r_Const_long(irg, low_unsigned, modulo_shift2);
 840         and        = new_r_And(block, right, cnst, low_unsigned);
 841         cnst       = new_r_Const(irg, get_mode_null(low_unsigned));
 842         cmp        = new_rd_Cmp(dbgi, block, and, cnst, ir_relation_equal);
 843         cond       = new_rd_Cond(dbgi, block, cmp);
 844         proj_true  = new_r_Proj(cond, mode_X, pn_Cond_true);
 845         proj_false = new_r_Proj(cond, mode_X, pn_Cond_false);
 846
 847         /* the true block => shift_width < 1word */
 848         {
 849                 /* In theory the low value (for 64bit shifts) is:
 850                  *    Or(High << (32-x)), Low >> x)
 851                  * In practice High << 32-x will fail when x is zero (since we have
 852                  * modulo shift and 32 will be 0). So instead we use:
 853                  *    Or(High<<1<<~x, Low >> x)
 854                  */
 855                 ir_node *in[1]        = { proj_true };
 856                 ir_node *block_true   = new_r_Block(irg, ARRAY_SIZE(in), in);
 857                 ir_node *res_high     = new_rd_shrs(dbgi, block_true, left_high,
 858                                                     right, mode);
 859                 ir_node *shift_low    = new_rd_Shr(dbgi, block_true, left_low, right,
 860                                                    low_unsigned);
 861                 ir_node *not_shiftval = new_rd_Not(dbgi, block_true, right,
 862                                                    low_unsigned);
 863                 ir_node *conv         = create_conv(block_true, left_high,
 864                                                     low_unsigned);
 865                 ir_node *one          = new_r_Const(irg, get_mode_one(low_unsigned));
 866                 ir_node *carry0       = new_rd_Shl(dbgi, block_true, conv, one,
 867                                                    low_unsigned);
 868                 ir_node *carry1       = new_rd_Shl(dbgi, block_true, carry0,
 869                                                    not_shiftval, low_unsigned);
 870                 ir_node *res_low      = new_rd_Or(dbgi, block_true, shift_low, carry1,
 871                                                   low_unsigned);
 872                 lower_in[0]           = new_r_Jmp(block_true);
 873                 phi_low_in[0]         = res_low;
 874                 phi_high_in[0]        = res_high;
 875         }
 876
 877         /* false block => shift_width > 1word */
 878         {
 879                 ir_node *in[1]       = { proj_false };
 880                 ir_node *block_false = new_r_Block(irg, ARRAY_SIZE(in), in);
 881                 ir_node *conv        = create_conv(block_false, left_high, low_unsigned);
 882                 ir_node *res_low     = new_rd_shrs(dbgi, block_false, conv, right,
 883                                                    low_unsigned);
 884                 int      cnsti       = modulo_shift2-1;
 885                 ir_node *cnst2       = new_r_Const_long(irg, low_unsigned, cnsti);
 886                 ir_node *res_high;
 887                 if (new_rd_shrs == new_rd_Shrs) {
 888                         res_high = new_rd_shrs(dbgi, block_false, left_high, cnst2, mode);
 889                 } else {
 890                         res_high = new_r_Const(irg, get_mode_null(mode));
 891                 }
 892                 lower_in[1]          = new_r_Jmp(block_false);
 893                 phi_low_in[1]        = res_low;
 894                 phi_high_in[1]       = res_high;
 895         }
 896
 897         /* patch lower block */
 898         set_irn_in(lower_block, ARRAY_SIZE(lower_in), lower_in);
 899         phi_low  = new_r_Phi(lower_block, ARRAY_SIZE(phi_low_in), phi_low_in,
 900                              low_unsigned);
 901         phi_high = new_r_Phi(lower_block, ARRAY_SIZE(phi_high_in), phi_high_in,
 902                              mode);
 903         ir_set_dw_lowered(node, phi_low, phi_high);
 904 }
 905
 906 static void lower_Shr(ir_node *node, ir_mode *mode)
 907 {
 908         lower_shr_helper(node, mode, new_rd_Shr);
 909 }
 910
 911 static void lower_Shrs(ir_node *node, ir_mode *mode)
 912 {
 913         lower_shr_helper(node, mode, new_rd_Shrs);
 914 }
 915
 916 static void lower_Shl(ir_node *node, ir_mode *mode)
 917 {
 918         ir_node  *right         = get_binop_right(node);
 919         ir_node  *left          = get_binop_left(node);
 920         ir_mode  *shr_mode      = get_irn_mode(node);
 921         unsigned  modulo_shift  = get_mode_modulo_shift(shr_mode);
 922         ir_mode  *low_unsigned  = env->low_unsigned;
 923         unsigned  modulo_shift2 = get_mode_modulo_shift(mode);
 924         ir_graph *irg           = get_irn_irg(node);
 925         ir_node  *left_low      = get_lowered_low(left);
 926         ir_node  *left_high     = get_lowered_high(left);
 927         dbg_info *dbgi          = get_irn_dbg_info(node);
 928         ir_node  *lower_block   = get_nodes_block(node);
 929         ir_node  *block;
 930         ir_node  *cnst;
 931         ir_node  *and;
 932         ir_node  *cmp;
 933         ir_node  *cond;
 934         ir_node  *proj_true;
 935         ir_node  *proj_false;
 936         ir_node  *phi_low;
 937         ir_node  *phi_high;
 938         ir_node  *lower_in[2];
 939         ir_node  *phi_low_in[2];
 940         ir_node  *phi_high_in[2];
 941
 942         /* this version is optimized for modulo shift architectures
 943          * (and can't handle anything else) */
 944         if (modulo_shift != get_mode_size_bits(shr_mode)
 945                         || modulo_shift2<<1 != modulo_shift) {
 946                 panic("Shr lowering only implemented for modulo shift shr operations");
 947         }
 948         if (!is_po2(modulo_shift) || !is_po2(modulo_shift2)) {
 949                 panic("Shr lowering only implemented for power-of-2 modes");
 950         }
 951         /* without 2-complement the -x instead of (bit_width-x) trick won't work */
 952         if (get_mode_arithmetic(shr_mode) != irma_twos_complement) {
 953                 panic("Shr lowering only implemented for two-complement modes");
 954         }
 955
 956         /* if the right operand is a 64bit value, we're only interested in the
 957          * lower word */
 958         if (get_irn_mode(right) == env->high_unsigned) {
 959                 right = get_lowered_low(right);
 960         } else {
 961                 /* shift should never have signed mode on the right */
 962                 assert(get_irn_mode(right) != env->high_signed);
 963                 right = create_conv(lower_block, right, low_unsigned);
 964         }
 965
 966         part_block_dw(node);
 967         env->flags |= CF_CHANGED;
 968         block = get_nodes_block(node);
 969
 970         /* add a Cmp to test if highest bit is set <=> whether we shift more
 971          * than half the word width */
 972         cnst       = new_r_Const_long(irg, low_unsigned, modulo_shift2);
 973         and        = new_r_And(block, right, cnst, low_unsigned);
 974         cnst       = new_r_Const(irg, get_mode_null(low_unsigned));
 975         cmp        = new_rd_Cmp(dbgi, block, and, cnst, ir_relation_equal);
 976         cond       = new_rd_Cond(dbgi, block, cmp);
 977         proj_true  = new_r_Proj(cond, mode_X, pn_Cond_true);
 978         proj_false = new_r_Proj(cond, mode_X, pn_Cond_false);
 979
 980         /* the true block => shift_width < 1word */
 981         {
 982                 ir_node *in[1]        = { proj_true };
 983                 ir_node *block_true   = new_r_Block(irg, ARRAY_SIZE(in), in);
 984
 985                 ir_node *res_low      = new_rd_Shl(dbgi, block_true, left_low,
 986                                                    right, low_unsigned);
 987                 ir_node *shift_high   = new_rd_Shl(dbgi, block_true, left_high, right,
 988                                                    mode);
 989                 ir_node *not_shiftval = new_rd_Not(dbgi, block_true, right,
 990                                                    low_unsigned);
 991                 ir_node *conv         = create_conv(block_true, left_low, mode);
 992                 ir_node *one          = new_r_Const(irg, get_mode_one(low_unsigned));
 993                 ir_node *carry0       = new_rd_Shr(dbgi, block_true, conv, one, mode);
 994                 ir_node *carry1       = new_rd_Shr(dbgi, block_true, carry0,
 995                                                    not_shiftval, mode);
 996                 ir_node *res_high     = new_rd_Or(dbgi, block_true, shift_high, carry1,
 997                                                   mode);
 998                 lower_in[0]           = new_r_Jmp(block_true);
 999                 phi_low_in[0]         = res_low;
1000                 phi_high_in[0]        = res_high;
1001         }
1002
1003         /* false block => shift_width > 1word */
1004         {
1005                 ir_node *in[1]       = { proj_false };
1006                 ir_node *block_false = new_r_Block(irg, ARRAY_SIZE(in), in);
1007                 ir_node *res_low     = new_r_Const(irg, get_mode_null(low_unsigned));
1008                 ir_node *conv        = create_conv(block_false, left_low, mode);
1009                 ir_node *res_high    = new_rd_Shl(dbgi, block_false, conv, right, mode);
1010                 lower_in[1]          = new_r_Jmp(block_false);
1011                 phi_low_in[1]        = res_low;
1012                 phi_high_in[1]       = res_high;
1013         }
1014
1015         /* patch lower block */
1016         set_irn_in(lower_block, ARRAY_SIZE(lower_in), lower_in);
1017         phi_low  = new_r_Phi(lower_block, ARRAY_SIZE(phi_low_in), phi_low_in,
1018                              low_unsigned);
1019         phi_high = new_r_Phi(lower_block, ARRAY_SIZE(phi_high_in), phi_high_in,
1020                              mode);
1021         ir_set_dw_lowered(node, phi_low, phi_high);
1022 }
1023
1024 /**
1025  * Rebuild Rotl nodes into Or(Shl, Shr) and prepare all nodes.
1026  */
1027 static void prepare_links_and_handle_rotl(ir_node *node, void *data)
1028 {
1029         (void) data;
1030         if (is_Rotl(node)) {
1031                 ir_mode  *mode = get_irn_op_mode(node);
1032                 ir_node  *right;
1033                 ir_node  *left, *shl, *shr, *ornode, *block, *sub, *c;
1034                 ir_mode  *omode, *rmode;
1035                 ir_graph *irg;
1036                 dbg_info *dbg;
1037                 optimization_state_t state;
1038
1039                 if (mode != env->high_signed && mode != env->high_unsigned) {
1040                         prepare_links(node);
1041                         return;
1042                 }
1043
1044                 /* replace the Rotl(x,y) by an Or(Shl(x,y), Shr(x,64-y)) */
1045                 right = get_Rotl_right(node);
1046                 irg   = get_irn_irg(node);
1047                 dbg   = get_irn_dbg_info(node);
1048                 omode = get_irn_mode(node);
1049                 left  = get_Rotl_left(node);
1050                 block = get_nodes_block(node);
1051                 shl   = new_rd_Shl(dbg, block, left, right, omode);
1052                 rmode = get_irn_mode(right);
1053                 c     = new_r_Const_long(irg, rmode, get_mode_size_bits(omode));
1054                 sub   = new_rd_Sub(dbg, block, c, right, rmode);
1055                 shr   = new_rd_Shr(dbg, block, left, sub, omode);
1056
1057                 /* switch optimization off here, or we will get the Rotl back */
1058                 save_optimization_state(&state);
1059                 set_opt_algebraic_simplification(0);
1060                 ornode = new_rd_Or(dbg, block, shl, shr, omode);
1061                 restore_optimization_state(&state);
1062
1063                 exchange(node, ornode);
1064
1065                 /* do lowering on the new nodes */
1066                 prepare_links(shl);
1067                 prepare_links(c);
1068                 prepare_links(sub);
1069                 prepare_links(shr);
1070                 prepare_links(ornode);
1071                 return;
1072         }
1073
1074         prepare_links(node);
1075 }
1076
1077 /**
1078  * Translate an Unop.
1079  *
1080  * Create an intrinsic Call.
1081  */
1082 static void lower_unop(ir_node *node, ir_mode *mode)
1083 {
1084         ir_node  *op       = get_unop_op(node);
1085         dbg_info *dbgi     = get_irn_dbg_info(node);
1086         ir_node  *block    = get_nodes_block(node);
1087         ir_graph *irg      = get_irn_irg(block);
1088         ir_type  *mtp      = mode_is_signed(mode) ? unop_tp_s : unop_tp_u;
1089         ir_op    *irop     = get_irn_op(node);
1090         ir_node  *addr     = get_intrinsic_address(mtp, irop, mode, mode);
1091         ir_node  *nomem    = get_irg_no_mem(irg);
1092         ir_node  *in[2];
1093         ir_node  *call;
1094         ir_node  *resproj;
1095
1096         if (env->params->little_endian) {
1097                 in[0] = get_lowered_low(op);
1098                 in[1] = get_lowered_high(op);
1099         } else {
1100                 in[0] = get_lowered_high(op);
1101                 in[1] = get_lowered_low(op);
1102         }
1103         call    = new_rd_Call(dbgi, block, nomem, addr, 2, in, mtp);
1104         resproj = new_r_Proj(call, mode_T, pn_Call_T_result);
1105         set_irn_pinned(call, get_irn_pinned(node));
1106
1107         if (env->params->little_endian) {
1108                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 0);
1109                 ir_node *res_high = new_r_Proj(resproj, mode,              1);
1110                 ir_set_dw_lowered(node, res_low, res_high);
1111         } else {
1112                 ir_node *res_low  = new_r_Proj(resproj, env->low_unsigned, 1);
1113                 ir_node *res_high = new_r_Proj(resproj, mode,              0);
1114                 ir_set_dw_lowered(node, res_low, res_high);
1115         }
1116 }
1117
1118 /**
1119  * Translate a logical binop.
1120  *
1121  * Create two logical binops.
1122  */
1123 static void lower_binop_logical(ir_node *node, ir_mode *mode,
1124                                                                 ir_node *(*constr_rd)(dbg_info *db, ir_node *block, ir_node *op1, ir_node *op2, ir_mode *mode) )
1125 {
1126         ir_node               *left        = get_binop_left(node);
1127         ir_node               *right       = get_binop_right(node);
1128         const lower64_entry_t *left_entry  = get_node_entry(left);
1129         const lower64_entry_t *right_entry = get_node_entry(right);
1130         dbg_info              *dbgi        = get_irn_dbg_info(node);
1131         ir_node               *block       = get_nodes_block(node);
1132         ir_node               *res_low
1133                 = constr_rd(dbgi, block, left_entry->low_word, right_entry->low_word,
1134                             env->low_unsigned);
1135         ir_node               *res_high
1136                 = constr_rd(dbgi, block, left_entry->high_word, right_entry->high_word,
1137                             mode);
1138         ir_set_dw_lowered(node, res_low, res_high);
1139 }
1140
1141 static void lower_And(ir_node *node, ir_mode *mode)
1142 {
1143         lower_binop_logical(node, mode, new_rd_And);
1144 }
1145
1146 static void lower_Or(ir_node *node, ir_mode *mode)
1147 {
1148         lower_binop_logical(node, mode, new_rd_Or);
1149 }
1150
1151 static void lower_Eor(ir_node *node, ir_mode *mode)
1152 {
1153         lower_binop_logical(node, mode, new_rd_Eor);
1154 }
1155
1156 /**
1157  * Translate a Not.
1158  *
1159  * Create two logical Nots.
1160  */
1161 static void lower_Not(ir_node *node, ir_mode *mode)
1162 {
1163         ir_node               *op       = get_Not_op(node);
1164         const lower64_entry_t *op_entry = get_node_entry(op);
1165         dbg_info              *dbgi     = get_irn_dbg_info(node);
1166         ir_node               *block    = get_nodes_block(node);
1167         ir_node               *res_low
1168                 = new_rd_Not(dbgi, block, op_entry->low_word, env->low_unsigned);
1169         ir_node               *res_high
1170                 = new_rd_Not(dbgi, block, op_entry->high_word, mode);
1171         ir_set_dw_lowered(node, res_low, res_high);
1172 }
1173
1174 static bool is_equality_cmp(const ir_node *node)
1175 {
1176         ir_relation relation = get_Cmp_relation(node);
1177         ir_node    *left     = get_Cmp_left(node);
1178         ir_node    *right    = get_Cmp_right(node);
1179         ir_mode    *mode     = get_irn_mode(left);
1180
1181         /* this probably makes no sense if unordered is involved */
1182         assert(!mode_is_float(mode));
1183
1184         if (relation == ir_relation_equal || relation == ir_relation_less_greater)
1185                 return true;
1186
1187         if (!is_Const(right) || !is_Const_null(right))
1188                 return false;
1189         if (mode_is_signed(mode)) {
1190                 return relation == ir_relation_less_greater;
1191         } else {
1192                 return relation == ir_relation_greater;
1193         }
1194 }
1195
1196 static ir_node *get_cfop_destination(const ir_node *cfop)
1197 {
1198         const ir_edge_t *first = get_irn_out_edge_first(cfop);
1199         /* we should only have 1 destination */
1200         assert(get_irn_n_edges(cfop) == 1);
1201         return get_edge_src_irn(first);
1202 }
1203
1204 /**
1205  * Translate a Cond.
1206  */
1207 static void lower_Cond(ir_node *node, ir_mode *high_mode)
1208 {
1209         ir_node *left, *right, *block;
1210         ir_node *sel = get_Cond_selector(node);
1211         ir_mode *m = get_irn_mode(sel);
1212         ir_mode *cmp_mode;
1213         const lower64_entry_t *lentry, *rentry;
1214         ir_node  *projT = NULL, *projF = NULL;
1215         ir_node  *new_bl, *irn;
1216         ir_node  *projHF, *projHT;
1217         ir_node  *dst_blk;
1218         ir_relation relation;
1219         ir_graph *irg;
1220         dbg_info *dbg;
1221         const ir_edge_t *edge;
1222         const ir_edge_t *next;
1223
1224         (void) high_mode;
1225
1226         if (m != mode_b) {
1227                 if (m == env->high_signed || m == env->high_unsigned) {
1228                         /* bad we can't really handle Switch with 64bit offsets */
1229                         panic("Cond with 64bit jumptable not supported");
1230                 }
1231                 lower_node(sel);
1232                 return;
1233         }
1234
1235         if (!is_Cmp(sel)) {
1236                 lower_node(sel);
1237                 return;
1238         }
1239
1240         left     = get_Cmp_left(sel);
1241         cmp_mode = get_irn_mode(left);
1242         if (cmp_mode != env->high_signed && cmp_mode != env->high_unsigned) {
1243                 lower_node(sel);
1244                 return;
1245         }
1246
1247         right  = get_Cmp_right(sel);
1248         lower_node(left);
1249         lower_node(right);
1250         lentry = get_node_entry(left);
1251         rentry = get_node_entry(right);
1252
1253         /* all right, build the code */
1254         foreach_out_edge_safe(node, edge, next) {
1255                 ir_node *proj    = get_edge_src_irn(edge);
1256                 long     proj_nr;
1257                 if (!is_Proj(proj))
1258                         continue;
1259                 proj_nr = get_Proj_proj(proj);
1260
1261                 if (proj_nr == pn_Cond_true) {
1262                         assert(projT == NULL && "more than one Proj(true)");
1263                         projT = proj;
1264                 } else {
1265                         assert(proj_nr == pn_Cond_false);
1266                         assert(projF == NULL && "more than one Proj(false)");
1267                         projF = proj;
1268                 }
1269                 mark_irn_visited(proj);
1270         }
1271         assert(projT && projF);
1272
1273         /* create a new high compare */
1274         block    = get_nodes_block(node);
1275         irg      = get_Block_irg(block);
1276         dbg      = get_irn_dbg_info(sel);
1277         relation = get_Cmp_relation(sel);
1278
1279         if (is_equality_cmp(sel)) {
1280                 /* x ==/!= y ==> or(x_low^y_low,x_high^y_high) ==/!= 0 */
1281                 ir_mode *mode       = env->low_unsigned;
1282                 ir_node *low_left   = new_rd_Conv(dbg, block, lentry->low_word, mode);
1283                 ir_node *high_left  = new_rd_Conv(dbg, block, lentry->high_word, mode);
1284                 ir_node *low_right  = new_rd_Conv(dbg, block, rentry->low_word, mode);
1285                 ir_node *high_right = new_rd_Conv(dbg, block, rentry->high_word, mode);
1286                 ir_node *xor_low    = new_rd_Eor(dbg, block, low_left, low_right, mode);
1287                 ir_node *xor_high   = new_rd_Eor(dbg, block, high_left, high_right, mode);
1288                 ir_node *ornode = new_rd_Or(dbg, block, xor_low, xor_high, mode);
1289                 ir_node *cmp    = new_rd_Cmp(dbg, block, ornode, new_r_Const_long(irg, mode, 0), relation);
1290                 set_Cond_selector(node, cmp);
1291                 return;
1292         }
1293
1294         if (relation == ir_relation_equal) {
1295                 ir_node *proj;
1296                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1297                 dst_blk = get_cfop_destination(projF);
1298
1299                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1300                                  ir_relation_equal);
1301                 dbg = get_irn_dbg_info(node);
1302                 irn = new_rd_Cond(dbg, block, irn);
1303
1304                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1305                 mark_irn_visited(projHF);
1306                 exchange(projF, projHF);
1307
1308                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1309                 mark_irn_visited(projHT);
1310
1311                 new_bl = new_r_Block(irg, 1, &projHT);
1312
1313                 dbg = get_irn_dbg_info(sel);
1314                 irn = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word,
1315                                   ir_relation_equal);
1316                 dbg = get_irn_dbg_info(node);
1317                 irn = new_rd_Cond(dbg, new_bl, irn);
1318
1319                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1320                 mark_irn_visited(proj);
1321                 add_block_cf_input(dst_blk, projHF, proj);
1322
1323                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1324                 mark_irn_visited(proj);
1325                 exchange(projT, proj);
1326         } else if (relation == ir_relation_less_greater) {
1327                 ir_node *proj;
1328                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1329                 dst_blk = get_cfop_destination(projT);
1330
1331                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1332                                  ir_relation_less_greater);
1333                 dbg = get_irn_dbg_info(node);
1334                 irn = new_rd_Cond(dbg, block, irn);
1335
1336                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1337                 mark_irn_visited(projHT);
1338                 exchange(projT, projHT);
1339
1340                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1341                 mark_irn_visited(projHF);
1342
1343                 new_bl = new_r_Block(irg, 1, &projHF);
1344
1345                 dbg = get_irn_dbg_info(sel);
1346                 irn = new_rd_Cmp(dbg, new_bl, lentry->low_word, rentry->low_word,
1347                                  ir_relation_less_greater);
1348                 dbg = get_irn_dbg_info(node);
1349                 irn = new_rd_Cond(dbg, new_bl, irn);
1350
1351                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1352                 mark_irn_visited(proj);
1353                 add_block_cf_input(dst_blk, projHT, proj);
1354
1355                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1356                 mark_irn_visited(proj);
1357                 exchange(projF, proj);
1358         } else {
1359                 ir_node *proj;
1360                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1361                 ir_node *dstT, *dstF, *newbl_eq, *newbl_l;
1362                 ir_node *projEqF;
1363
1364                 dstT = get_cfop_destination(projT);
1365                 dstF = get_cfop_destination(projF);
1366
1367                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1368                                  relation & ~ir_relation_equal);
1369                 dbg = get_irn_dbg_info(node);
1370                 irn = new_rd_Cond(dbg, block, irn);
1371
1372                 projHT = new_r_Proj(irn, mode_X, pn_Cond_true);
1373                 mark_irn_visited(projHT);
1374
1375                 projHF = new_r_Proj(irn, mode_X, pn_Cond_false);
1376                 mark_irn_visited(projHF);
1377
1378                 newbl_eq = new_r_Block(irg, 1, &projHF);
1379
1380                 irn = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1381                                  ir_relation_equal);
1382                 irn = new_rd_Cond(dbg, newbl_eq, irn);
1383
1384                 projEqF = new_r_Proj(irn, mode_X, pn_Cond_false);
1385                 mark_irn_visited(projEqF);
1386
1387                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1388                 mark_irn_visited(proj);
1389
1390                 newbl_l = new_r_Block(irg, 1, &proj);
1391
1392                 dbg = get_irn_dbg_info(sel);
1393                 irn = new_rd_Cmp(dbg, newbl_l, lentry->low_word, rentry->low_word,
1394                                  relation);
1395                 dbg = get_irn_dbg_info(node);
1396                 irn = new_rd_Cond(dbg, newbl_l, irn);
1397
1398                 proj = new_r_Proj(irn, mode_X, pn_Cond_true);
1399                 mark_irn_visited(proj);
1400                 add_block_cf_input(dstT, projT, proj);
1401
1402                 proj = new_r_Proj(irn, mode_X, pn_Cond_false);
1403                 mark_irn_visited(proj);
1404                 add_block_cf_input(dstF, projF, proj);
1405
1406                 exchange(projT, projHT);
1407                 exchange(projF, projEqF);
1408         }
1409
1410         /* we have changed the control flow */
1411         env->flags |= CF_CHANGED;
1412 }
1413
1414 /**
1415  * Translate a Conv to higher_signed
1416  */
1417 static void lower_Conv_to_Ll(ir_node *node)
1418 {
1419         ir_mode  *omode        = get_irn_mode(node);
1420         ir_node  *op           = get_Conv_op(node);
1421         ir_mode  *imode        = get_irn_mode(op);
1422         ir_graph *irg          = get_irn_irg(node);
1423         ir_node  *block        = get_nodes_block(node);
1424         dbg_info *dbg          = get_irn_dbg_info(node);
1425         ir_node  *res_low;
1426         ir_node  *res_high;
1427
1428         ir_mode  *low_unsigned = env->low_unsigned;
1429         ir_mode  *low_signed
1430                 = mode_is_signed(omode) ? env->low_signed : low_unsigned;
1431
1432         if (mode_is_int(imode) || mode_is_reference(imode)) {
1433                 if (imode == env->high_signed || imode == env->high_unsigned) {
1434                         /* a Conv from Lu to Ls or Ls to Lu */
1435                         const lower64_entry_t *op_entry = get_node_entry(op);
1436                         res_low  = op_entry->low_word;
1437                         res_high = new_rd_Conv(dbg, block, op_entry->high_word, low_signed);
1438                 } else {
1439                         /* simple case: create a high word */
1440                         if (imode != low_unsigned)
1441                                 op = new_rd_Conv(dbg, block, op, low_unsigned);
1442
1443                         res_low = op;
1444
1445                         if (mode_is_signed(imode)) {
1446                                 int      c       = get_mode_size_bits(low_signed) - 1;
1447                                 ir_node *cnst    = new_r_Const_long(irg, low_unsigned, c);
1448                                 if (get_irn_mode(op) != low_signed)
1449                                         op = new_rd_Conv(dbg, block, op, low_signed);
1450                                 res_high = new_rd_Shrs(dbg, block, op, cnst, low_signed);
1451                         } else {
1452                                 res_high = new_r_Const(irg, get_mode_null(low_signed));
1453                         }
1454                 }
1455         } else if (imode == mode_b) {
1456                 res_low  = new_rd_Conv(dbg, block, op, low_unsigned);
1457                 res_high = new_r_Const(irg, get_mode_null(low_signed));
1458         } else {
1459                 ir_node *irn, *call;
1460                 ir_type *mtp = get_conv_type(imode, omode);
1461
1462                 irn = get_intrinsic_address(mtp, get_irn_op(node), imode, omode);
1463                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 1, &op, mtp);
1464                 set_irn_pinned(call, get_irn_pinned(node));
1465                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1466
1467                 res_low  = new_r_Proj(irn, low_unsigned, 0);
1468                 res_high = new_r_Proj(irn, low_signed, 1);
1469         }
1470         ir_set_dw_lowered(node, res_low, res_high);
1471 }
1472
1473 /**
1474  * Translate a Conv from higher_unsigned
1475  */
1476 static void lower_Conv_from_Ll(ir_node *node)
1477 {
1478         ir_node               *op    = get_Conv_op(node);
1479         ir_mode               *omode = get_irn_mode(node);
1480         ir_node               *block = get_nodes_block(node);
1481         dbg_info              *dbg   = get_irn_dbg_info(node);
1482         ir_graph              *irg   = get_irn_irg(node);
1483         const lower64_entry_t *entry = get_node_entry(op);
1484
1485         if (mode_is_int(omode) || mode_is_reference(omode)) {
1486                 op = entry->low_word;
1487
1488                 /* simple case: create a high word */
1489                 if (omode != env->low_unsigned)
1490                         op = new_rd_Conv(dbg, block, op, omode);
1491
1492                 set_Conv_op(node, op);
1493         } else if (omode == mode_b) {
1494                 /* llu ? true : false  <=> (low|high) ? true : false */
1495                 ir_mode *mode   = env->low_unsigned;
1496                 ir_node *ornode = new_rd_Or(dbg, block, entry->low_word,
1497                                             entry->high_word, mode);
1498                 set_Conv_op(node, ornode);
1499         } else {
1500                 ir_node *irn, *call, *in[2];
1501                 ir_mode *imode = get_irn_mode(op);
1502                 ir_type *mtp   = get_conv_type(imode, omode);
1503                 ir_node *res;
1504
1505                 irn   = get_intrinsic_address(mtp, get_irn_op(node), imode, omode);
1506                 in[0] = entry->low_word;
1507                 in[1] = entry->high_word;
1508
1509                 call = new_rd_Call(dbg, block, get_irg_no_mem(irg), irn, 2, in, mtp);
1510                 set_irn_pinned(call, get_irn_pinned(node));
1511                 irn = new_r_Proj(call, mode_T, pn_Call_T_result);
1512                 res = new_r_Proj(irn, omode, 0);
1513
1514                 exchange(node, res);
1515         }
1516 }
1517
1518 /**
1519  * lower Cmp
1520  */
1521 static void lower_Cmp(ir_node *cmp, ir_mode *m)
1522 {
1523         ir_node  *l        = get_Cmp_left(cmp);
1524         ir_mode  *cmp_mode = get_irn_mode(l);
1525         ir_node  *r, *low, *high, *t, *res;
1526         ir_relation relation;
1527         ir_node  *block;
1528         dbg_info *dbg;
1529         const lower64_entry_t *lentry;
1530         const lower64_entry_t *rentry;
1531         (void) m;
1532
1533         if (cmp_mode != env->high_signed && cmp_mode != env->high_unsigned)
1534                 return;
1535
1536         r        = get_Cmp_right(cmp);
1537         lentry   = get_node_entry(l);
1538         rentry   = get_node_entry(r);
1539         relation = get_Cmp_relation(cmp);
1540         block    = get_nodes_block(cmp);
1541         dbg      = get_irn_dbg_info(cmp);
1542
1543         /* easy case for x ==/!= 0 (see lower_Cond for details) */
1544         if (is_equality_cmp(cmp)) {
1545                 ir_graph *irg        = get_irn_irg(cmp);
1546                 ir_mode  *mode       = env->low_unsigned;
1547                 ir_node  *low_left   = new_rd_Conv(dbg, block, lentry->low_word, mode);
1548                 ir_node  *high_left  = new_rd_Conv(dbg, block, lentry->high_word, mode);
1549                 ir_node  *low_right  = new_rd_Conv(dbg, block, rentry->low_word, mode);
1550                 ir_node  *high_right = new_rd_Conv(dbg, block, rentry->high_word, mode);
1551                 ir_node  *xor_low    = new_rd_Eor(dbg, block, low_left, low_right, mode);
1552                 ir_node  *xor_high   = new_rd_Eor(dbg, block, high_left, high_right, mode);
1553                 ir_node  *ornode     = new_rd_Or(dbg, block, xor_low, xor_high, mode);
1554                 ir_node  *new_cmp    = new_rd_Cmp(dbg, block, ornode, new_r_Const_long(irg, mode, 0), relation);
1555                 exchange(cmp, new_cmp);
1556                 return;
1557         }
1558
1559         if (relation == ir_relation_equal) {
1560                 /* simple case:a == b <==> a_h == b_h && a_l == b_l */
1561                 low  = new_rd_Cmp(dbg, block, lentry->low_word, rentry->low_word,
1562                                   relation);
1563                 high = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1564                                   relation);
1565                 res  = new_rd_And(dbg, block, low, high, mode_b);
1566         } else if (relation == ir_relation_less_greater) {
1567                 /* simple case:a != b <==> a_h != b_h || a_l != b_l */
1568                 low  = new_rd_Cmp(dbg, block, lentry->low_word, rentry->low_word,
1569                                   relation);
1570                 high = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1571                                   relation);
1572                 res = new_rd_Or(dbg, block, low, high, mode_b);
1573         } else {
1574                 /* a rel b <==> a_h REL b_h || (a_h == b_h && a_l rel b_l) */
1575                 ir_node *high1 = new_rd_Cmp(dbg, block, lentry->high_word,
1576                         rentry->high_word, relation & ~ir_relation_equal);
1577                 low  = new_rd_Cmp(dbg, block, lentry->low_word, rentry->low_word,
1578                                   relation);
1579                 high = new_rd_Cmp(dbg, block, lentry->high_word, rentry->high_word,
1580                                   ir_relation_equal);
1581                 t = new_rd_And(dbg, block, low, high, mode_b);
1582                 res = new_rd_Or(dbg, block, high1, t, mode_b);
1583         }
1584         exchange(cmp, res);
1585 }
1586
1587 /**
1588  * Translate a Conv.
1589  */
1590 static void lower_Conv(ir_node *node, ir_mode *mode)
1591 {
1592         mode = get_irn_mode(node);
1593
1594         if (mode == env->high_signed || mode == env->high_unsigned) {
1595                 lower_Conv_to_Ll(node);
1596         } else {
1597                 ir_mode *op_mode = get_irn_mode(get_Conv_op(node));
1598
1599                 if (op_mode == env->high_signed || op_mode == env->high_unsigned) {
1600                         lower_Conv_from_Ll(node);
1601                 }
1602         }
1603 }
1604
1605 /**
1606  * Remember the new argument index of this value type entity in the lowered
1607  * method type.
1608  *
1609  * @param ent  the entity
1610  * @param pos  the argument index of this entity
1611  */
1612 static inline void set_entity_arg_idx(ir_entity *ent, size_t pos)
1613 {
1614         set_entity_link(ent, INT_TO_PTR(pos));
1615 }
1616
1617 /**
1618  * Retrieve the argument index of a value type entity.
1619  *
1620  * @param ent  the entity
1621  */
1622 static size_t get_entity_arg_idx(const ir_entity *ent) {
1623         return PTR_TO_INT(get_entity_link(ent));
1624 }
1625
1626 /**
1627  * Lower the method type.
1628  *
1629  * @param env  the lower environment
1630  * @param mtp  the method type to lower
1631  *
1632  * @return the lowered type
1633  */
1634 static ir_type *lower_mtp(ir_type *mtp)
1635 {
1636         pmap_entry *entry;
1637         ir_type    *res, *value_type;
1638
1639         entry = pmap_find(lowered_type, mtp);
1640         if (! entry) {
1641                 size_t i, orig_n_params, orig_n_res, n_param, n_res;
1642
1643                 /* count new number of params */
1644                 n_param = orig_n_params = get_method_n_params(mtp);
1645                 for (i = orig_n_params; i > 0;) {
1646                         ir_type *tp = get_method_param_type(mtp, --i);
1647
1648                         if (is_Primitive_type(tp)) {
1649                                 ir_mode *mode = get_type_mode(tp);
1650
1651                                 if (mode == env->high_signed || mode == env->high_unsigned)
1652                                         ++n_param;
1653                         }
1654                 }
1655
1656                 /* count new number of results */
1657                 n_res = orig_n_res = get_method_n_ress(mtp);
1658                 for (i = orig_n_res; i > 0;) {
1659                         ir_type *tp = get_method_res_type(mtp, --i);
1660
1661                         if (is_Primitive_type(tp)) {
1662                                 ir_mode *mode = get_type_mode(tp);
1663
1664                                 if (mode == env->high_signed || mode == env->high_unsigned)
1665                                         ++n_res;
1666                         }
1667                 }
1668
1669                 res = new_type_method(n_param, n_res);
1670
1671                 /* set param types and result types */
1672                 for (i = n_param = 0; i < orig_n_params; ++i) {
1673                         ir_type *tp = get_method_param_type(mtp, i);
1674
1675                         if (is_Primitive_type(tp)) {
1676                                 ir_mode *mode = get_type_mode(tp);
1677
1678                                 if (mode == env->high_signed) {
1679                                         if (env->params->little_endian) {
1680                                                 set_method_param_type(res, n_param++, tp_u);
1681                                                 set_method_param_type(res, n_param++, tp_s);
1682                                         } else {
1683                                                 set_method_param_type(res, n_param++, tp_s);
1684                                                 set_method_param_type(res, n_param++, tp_u);
1685                                         }
1686                                 } else if (mode == env->high_unsigned) {
1687                                         set_method_param_type(res, n_param++, tp_u);
1688                                         set_method_param_type(res, n_param++, tp_u);
1689                                 } else {
1690                                         set_method_param_type(res, n_param++, tp);
1691                                 }
1692                         } else {
1693                                 set_method_param_type(res, n_param++, tp);
1694                         }
1695                 }
1696                 for (i = n_res = 0; i < orig_n_res; ++i) {
1697                         ir_type *tp = get_method_res_type(mtp, i);
1698
1699                         if (is_Primitive_type(tp)) {
1700                                 ir_mode *mode = get_type_mode(tp);
1701
1702                                 if (mode == env->high_signed) {
1703                                         if (env->params->little_endian) {
1704                                                 set_method_res_type(res, n_res++, tp_u);
1705                                                 set_method_res_type(res, n_res++, tp_s);
1706                                         } else {
1707                                                 set_method_res_type(res, n_res++, tp_s);
1708                                                 set_method_res_type(res, n_res++, tp_u);
1709                                         }
1710                                 } else if (mode == env->high_unsigned) {
1711                                         set_method_res_type(res, n_res++, tp_u);
1712                                         set_method_res_type(res, n_res++, tp_u);
1713                                 } else {
1714                                         set_method_res_type(res, n_res++, tp);
1715                                 }
1716                         } else {
1717                                 set_method_res_type(res, n_res++, tp);
1718                         }
1719                 }
1720                 set_lowered_type(mtp, res);
1721                 pmap_insert(lowered_type, mtp, res);
1722
1723                 value_type = get_method_value_param_type(mtp);
1724                 if (value_type != NULL) {
1725                         /* this creates a new value parameter type */
1726                         (void)get_method_value_param_ent(res, 0);
1727
1728                         /* set new param positions for all entities of the value type */
1729                         for (i = n_param = 0; i < orig_n_params; ++i) {
1730                                 ir_type   *tp  = get_method_param_type(mtp, i);
1731                                 ir_entity *ent = get_method_value_param_ent(mtp, i);
1732
1733                                 set_entity_arg_idx(ent, n_param);
1734                                 if (is_Primitive_type(tp)) {
1735                                         ir_mode *mode = get_type_mode(tp);
1736
1737                                         if (mode == env->high_signed
1738                                             || mode == env->high_unsigned) {
1739                                                 n_param += 2;
1740                                                 continue;
1741                                         }
1742                                 }
1743                                 ++n_param;
1744                         }
1745
1746                         set_lowered_type(value_type, get_method_value_param_type(res));
1747                 }
1748         } else {
1749                 res = (ir_type*)entry->value;
1750         }
1751         return res;
1752 }
1753
1754 /**
1755  * Translate a Return.
1756  */
1757 static void lower_Return(ir_node *node, ir_mode *mode)
1758 {
1759         ir_graph  *irg = get_irn_irg(node);
1760         ir_entity *ent = get_irg_entity(irg);
1761         ir_type   *mtp = get_entity_type(ent);
1762         ir_node  **in;
1763         size_t     i, j, n;
1764         int        need_conv = 0;
1765         (void) mode;
1766
1767         /* check if this return must be lowered */
1768         for (i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1769                 ir_node *pred  = get_Return_res(node, i);
1770                 ir_mode *rmode = get_irn_op_mode(pred);
1771
1772                 if (rmode == env->high_signed || rmode == env->high_unsigned)
1773                         need_conv = 1;
1774         }
1775         if (! need_conv)
1776                 return;
1777
1778         ent = get_irg_entity(irg);
1779         mtp = get_entity_type(ent);
1780
1781         mtp = lower_mtp(mtp);
1782         set_entity_type(ent, mtp);
1783
1784         /* create a new in array */
1785         NEW_ARR_A(ir_node *, in, get_method_n_ress(mtp) + 1);
1786         in[0] = get_Return_mem(node);
1787
1788         for (j = i = 0, n = get_Return_n_ress(node); i < n; ++i) {
1789                 ir_node *pred      = get_Return_res(node, i);
1790                 ir_mode *pred_mode = get_irn_mode(pred);
1791
1792                 if (pred_mode == env->high_signed || pred_mode == env->high_unsigned) {
1793                         const lower64_entry_t *entry = get_node_entry(pred);
1794                         if (env->params->little_endian) {
1795                                 in[++j] = entry->low_word;
1796                                 in[++j] = entry->high_word;
1797                         } else {
1798                                 in[++j] = entry->high_word;
1799                                 in[++j] = entry->low_word;
1800                         }
1801                 } else {
1802                         in[++j] = pred;
1803                 }
1804         }
1805
1806         set_irn_in(node, j+1, in);
1807 }
1808
1809 /**
1810  * Translate the parameters.
1811  */
1812 static void lower_Start(ir_node *node, ir_mode *high_mode)
1813 {
1814         ir_graph  *irg = get_irn_irg(node);
1815         ir_entity *ent = get_irg_entity(irg);
1816         ir_type   *tp  = get_entity_type(ent);
1817         ir_node   *args;
1818         long      *new_projs;
1819         size_t    i, j, n_params;
1820         const ir_edge_t *edge;
1821         const ir_edge_t *next;
1822         (void) high_mode;
1823
1824         if (!mtp_must_be_lowered(tp))
1825                 return;
1826
1827         n_params = get_method_n_params(tp);
1828
1829         NEW_ARR_A(long, new_projs, n_params);
1830
1831         /* Calculate mapping of proj numbers in new_projs */
1832         for (i = j = 0; i < n_params; ++i, ++j) {
1833                 ir_type *ptp = get_method_param_type(tp, i);
1834
1835                 new_projs[i] = j;
1836                 if (is_Primitive_type(ptp)) {
1837                         ir_mode *amode = get_type_mode(ptp);
1838                         if (amode == env->high_signed || amode == env->high_unsigned)
1839                                 ++j;
1840                 }
1841         }
1842
1843         /* lower method type */
1844         tp = lower_mtp(tp);
1845         set_entity_type(ent, tp);
1846
1847         args = NULL;
1848         foreach_out_edge(node, edge) {
1849                 ir_node *proj = get_edge_src_irn(edge);
1850                 if (!is_Proj(proj))
1851                         continue;
1852                 if (get_Proj_proj(proj) == pn_Start_T_args) {
1853                         args = proj;
1854                         break;
1855                 }
1856         }
1857         if (args == NULL)
1858                 return;
1859
1860         /* fix all Proj's and create new ones */
1861         foreach_out_edge_safe(args, edge, next) {
1862                 ir_node *proj   = get_edge_src_irn(edge);
1863                 ir_mode *mode   = get_irn_mode(proj);
1864                 ir_mode *mode_l = env->low_unsigned;
1865                 ir_node *pred;
1866                 long     proj_nr;
1867                 ir_mode *mode_h;
1868                 ir_node *res_low;
1869                 ir_node *res_high;
1870                 dbg_info *dbg;
1871
1872                 if (!is_Proj(proj))
1873                         continue;
1874                 pred    = get_Proj_pred(proj);
1875                 proj_nr = get_Proj_proj(proj);
1876
1877                 if (mode == env->high_signed) {
1878                         mode_h = env->low_signed;
1879                 } else if (mode == env->high_unsigned) {
1880                         mode_h = env->low_unsigned;
1881                 } else {
1882                         long new_pn = new_projs[proj_nr];
1883                         set_Proj_proj(proj, new_pn);
1884                         continue;
1885                 }
1886
1887                 dbg = get_irn_dbg_info(proj);
1888                 if (env->params->little_endian) {
1889                         res_low  = new_rd_Proj(dbg, pred, mode_l, new_projs[proj_nr]);
1890                         res_high = new_rd_Proj(dbg, pred, mode_h, new_projs[proj_nr] + 1);
1891                 } else {
1892                         res_high = new_rd_Proj(dbg, pred, mode_h, new_projs[proj_nr]);
1893                         res_low  = new_rd_Proj(dbg, pred, mode_l, new_projs[proj_nr] + 1);
1894                 }
1895                 ir_set_dw_lowered(proj, res_low, res_high);
1896         }
1897 }
1898
1899 /**
1900  * Translate a Call.
1901  */
1902 static void lower_Call(ir_node *node, ir_mode *mode)
1903 {
1904         ir_type  *tp = get_Call_type(node);
1905         ir_node  **in;
1906         size_t   n_params, n_res;
1907         bool     need_lower = false;
1908         size_t   i, j;
1909         size_t   p;
1910         long     *res_numbers = NULL;
1911         ir_node  *resproj;
1912         const ir_edge_t *edge;
1913         const ir_edge_t *next;
1914         (void) mode;
1915
1916         n_params = get_method_n_params(tp);
1917         for (p = 0; p < n_params; ++p) {
1918                 ir_type *ptp = get_method_param_type(tp, p);
1919
1920                 if (is_Primitive_type(ptp)) {
1921                         ir_mode *pmode = get_type_mode(ptp);
1922                         if (pmode == env->high_signed || pmode == env->high_unsigned) {
1923                                 need_lower = true;
1924                                 break;
1925                         }
1926                 }
1927         }
1928         n_res = get_method_n_ress(tp);
1929         if (n_res > 0) {
1930                 NEW_ARR_A(long, res_numbers, n_res);
1931
1932                 for (i = j = 0; i < n_res; ++i, ++j) {
1933                         ir_type *ptp = get_method_res_type(tp, i);
1934
1935                         res_numbers[i] = j;
1936                         if (is_Primitive_type(ptp)) {
1937                                 ir_mode *rmode = get_type_mode(ptp);
1938                                 if (rmode == env->high_signed || rmode == env->high_unsigned) {
1939                                         need_lower = true;
1940                                         ++j;
1941                                 }
1942                         }
1943                 }
1944         }
1945
1946         if (! need_lower)
1947                 return;
1948
1949         /* let's lower it */
1950         tp = lower_mtp(tp);
1951         set_Call_type(node, tp);
1952
1953         NEW_ARR_A(ir_node *, in, get_method_n_params(tp) + 2);
1954
1955         in[0] = get_Call_mem(node);
1956         in[1] = get_Call_ptr(node);
1957
1958         for (j = 2, i = 0; i < n_params; ++i) {
1959                 ir_node *pred      = get_Call_param(node, i);
1960                 ir_mode *pred_mode = get_irn_mode(pred);
1961
1962                 if (pred_mode == env->high_signed || pred_mode == env->high_unsigned) {
1963                         const lower64_entry_t *pred_entry = get_node_entry(pred);
1964                         if (env->params->little_endian) {
1965                                 in[j++] = pred_entry->low_word;
1966                                 in[j++] = pred_entry->high_word;
1967                         } else {
1968                                 in[j++] = pred_entry->high_word;
1969                                 in[j++] = pred_entry->low_word;
1970                         }
1971                 } else {
1972                         in[j++] = pred;
1973                 }
1974         }
1975
1976         set_irn_in(node, j, in);
1977
1978         /* find results T */
1979         resproj = NULL;
1980         foreach_out_edge(node, edge) {
1981                 ir_node *proj = get_edge_src_irn(edge);
1982                 if (!is_Proj(proj))
1983                         continue;
1984                 if (get_Proj_proj(proj) == pn_Call_T_result) {
1985                         resproj = proj;
1986                         break;
1987                 }
1988         }
1989         if (resproj == NULL)
1990                 return;
1991
1992         /* fix the results */
1993         foreach_out_edge_safe(resproj, edge, next) {
1994                 ir_node  *proj      = get_edge_src_irn(edge);
1995                 ir_mode  *proj_mode = get_irn_mode(proj);
1996                 ir_mode  *mode_l    = env->low_unsigned;
1997                 ir_node  *pred;
1998                 long      proj_nr;
1999                 ir_mode  *mode_h;
2000                 ir_node  *res_low;
2001                 ir_node  *res_high;
2002                 dbg_info *dbg;
2003
2004                 if (!is_Proj(proj))
2005                         continue;
2006                 pred    = get_Proj_pred(proj);
2007                 proj_nr = get_Proj_proj(proj);
2008
2009                 if (proj_mode == env->high_signed) {
2010                         mode_h = env->low_signed;
2011                 } else if (proj_mode == env->high_unsigned) {
2012                         mode_h = env->low_unsigned;
2013                 } else {
2014                         long new_nr = res_numbers[proj_nr];
2015                         set_Proj_proj(proj, new_nr);
2016                         continue;
2017                 }
2018
2019                 dbg = get_irn_dbg_info(proj);
2020                 if (env->params->little_endian) {
2021                         res_low  = new_rd_Proj(dbg, pred, mode_l, res_numbers[proj_nr]);
2022                         res_high = new_rd_Proj(dbg, pred, mode_h, res_numbers[proj_nr] + 1);
2023                 } else {
2024                         res_high = new_rd_Proj(dbg, pred, mode_h, res_numbers[proj_nr]);
2025                         res_low  = new_rd_Proj(dbg, pred, mode_l, res_numbers[proj_nr] + 1);
2026                 }
2027                 ir_set_dw_lowered(proj, res_low, res_high);
2028         }
2029 }
2030
2031 /**
2032  * Translate an Unknown into two.
2033  */
2034 static void lower_Unknown(ir_node *node, ir_mode *mode)
2035 {
2036         ir_mode  *low_mode = env->low_unsigned;
2037         ir_graph *irg      = get_irn_irg(node);
2038         ir_node  *res_low  = new_r_Unknown(irg, low_mode);
2039         ir_node  *res_high = new_r_Unknown(irg, mode);
2040         ir_set_dw_lowered(node, res_low, res_high);
2041 }
2042
2043 /**
2044  * Translate a Bad into two.
2045  */
2046 static void lower_Bad(ir_node *node, ir_mode *mode)
2047 {
2048         ir_mode  *low_mode = env->low_unsigned;
2049         ir_graph *irg      = get_irn_irg(node);
2050         ir_node  *res_low  = new_r_Bad(irg, low_mode);
2051         ir_node  *res_high = new_r_Bad(irg, mode);
2052         ir_set_dw_lowered(node, res_low, res_high);
2053 }
2054
2055 /**
2056  * Translate a Phi.
2057  *
2058  * First step: just create two templates
2059  */
2060 static void lower_Phi(ir_node *phi)
2061 {
2062         ir_mode  *mode = get_irn_mode(phi);
2063         int       i;
2064         int       arity;
2065         ir_node **in_l;
2066         ir_node **in_h;
2067         ir_node  *unk_l;
2068         ir_node  *unk_h;
2069         ir_node  *phi_l;
2070         ir_node  *phi_h;
2071         dbg_info *dbg;
2072         ir_node  *block;
2073         ir_graph *irg;
2074         ir_mode  *mode_l;
2075         ir_mode  *mode_h;
2076
2077         /* enqueue predecessors */
2078         arity = get_Phi_n_preds(phi);
2079         for (i = 0; i < arity; ++i) {
2080                 ir_node *pred = get_Phi_pred(phi, i);
2081                 pdeq_putr(env->waitq, pred);
2082         }
2083
2084         if (mode != env->high_signed && mode != env->high_unsigned)
2085                 return;
2086
2087         /* first create a new in array */
2088         NEW_ARR_A(ir_node *, in_l, arity);
2089         NEW_ARR_A(ir_node *, in_h, arity);
2090         irg    = get_irn_irg(phi);
2091         mode_l = env->low_unsigned;
2092         mode_h = mode == env->high_signed ? env->low_signed : env->low_unsigned;
2093         unk_l  = new_r_Dummy(irg, mode_l);
2094         unk_h  = new_r_Dummy(irg, mode_h);
2095         for (i = 0; i < arity; ++i) {
2096                 in_l[i] = unk_l;
2097                 in_h[i] = unk_h;
2098         }
2099
2100         dbg   = get_irn_dbg_info(phi);
2101         block = get_nodes_block(phi);
2102         phi_l = new_rd_Phi(dbg, block, arity, in_l, mode_l);
2103         phi_h = new_rd_Phi(dbg, block, arity, in_h, mode_h);
2104
2105         ir_set_dw_lowered(phi, phi_l, phi_h);
2106
2107         /* remember that we need to fixup the predecessors later */
2108         ARR_APP1(ir_node*, env->lowered_phis, phi);
2109 }
2110
2111 static void fixup_phi(ir_node *phi)
2112 {
2113         const lower64_entry_t *entry = get_node_entry(phi);
2114         ir_node               *phi_l = entry->low_word;
2115         ir_node               *phi_h = entry->high_word;
2116         int                    arity = get_Phi_n_preds(phi);
2117         int                    i;
2118
2119         /* exchange phi predecessors which are lowered by now */
2120         for (i = 0; i < arity; ++i) {
2121                 ir_node               *pred       = get_Phi_pred(phi, i);
2122                 const lower64_entry_t *pred_entry = get_node_entry(pred);
2123
2124                 set_Phi_pred(phi_l, i, pred_entry->low_word);
2125                 set_Phi_pred(phi_h, i, pred_entry->high_word);
2126         }
2127 }
2128
2129 /**
2130  * Translate a Mux.
2131  */
2132 static void lower_Mux(ir_node *mux, ir_mode *mode)
2133 {
2134         ir_node               *truen       = get_Mux_true(mux);
2135         ir_node               *falsen      = get_Mux_false(mux);
2136         ir_node               *sel         = get_Mux_sel(mux);
2137         const lower64_entry_t *true_entry  = get_node_entry(truen);
2138         const lower64_entry_t *false_entry = get_node_entry(falsen);
2139         ir_node               *true_l      = true_entry->low_word;
2140         ir_node               *true_h      = true_entry->high_word;
2141         ir_node               *false_l     = false_entry->low_word;
2142         ir_node               *false_h     = false_entry->high_word;
2143         dbg_info              *dbgi        = get_irn_dbg_info(mux);
2144         ir_node               *block       = get_nodes_block(mux);
2145         ir_node               *res_low
2146                 = new_rd_Mux(dbgi, block, sel, false_l, true_l, env->low_unsigned);
2147         ir_node               *res_high
2148                 = new_rd_Mux(dbgi, block, sel, false_h, true_h, mode);
2149         ir_set_dw_lowered(mux, res_low, res_high);
2150 }
2151
2152 /**
2153  * Translate an ASM node.
2154  */
2155 static void lower_ASM(ir_node *asmn, ir_mode *mode)
2156 {
2157         ir_mode           *high_signed        = env->high_signed;
2158         ir_mode           *high_unsigned      = env->high_unsigned;
2159         int                n_outs             = get_ASM_n_output_constraints(asmn);
2160         ir_asm_constraint *output_constraints = get_ASM_output_constraints(asmn);
2161         ir_asm_constraint *input_constraints  = get_ASM_input_constraints(asmn);
2162         unsigned           n_64bit_outs       = 0;
2163         int      i;
2164
2165         (void)mode;
2166
2167         for (i = get_irn_arity(asmn) - 1; i >= 0; --i) {
2168                 ir_node *op      = get_irn_n(asmn, i);
2169                 ir_mode *op_mode = get_irn_mode(op);
2170                 if (op_mode == high_signed || op_mode == high_unsigned) {
2171                         panic("lowering ASM 64bit input unimplemented");
2172                 }
2173         }
2174
2175         for (i = 0; i < n_outs; ++i) {
2176                 const ir_asm_constraint *constraint = &output_constraints[i];
2177                 if (constraint->mode == high_signed || constraint->mode == high_unsigned) {
2178                         const char *constr = get_id_str(constraint->constraint);
2179                         ++n_64bit_outs;
2180                         /* TODO: How to do this architecture neutral? This is very
2181                          * i386 specific... */
2182                         if (constr[0] != '=' || constr[1] != 'A') {
2183                                 panic("lowering ASM 64bit output only supports '=A' currently");
2184                         }
2185                 }
2186         }
2187
2188         if (n_64bit_outs == 0)
2189                 return;
2190
2191         {
2192                 dbg_info          *dbgi       = get_irn_dbg_info(asmn);
2193                 ir_node           *block      = get_nodes_block(asmn);
2194                 int                arity      = get_irn_arity(asmn);
2195                 ir_node          **in         = get_irn_in(asmn) + 1;
2196                 int                new_n_outs = 0;
2197                 int                n_clobber  = get_ASM_n_clobbers(asmn);
2198                 long              *proj_map   = ALLOCAN(long, n_outs);
2199                 ident            **clobbers   = get_ASM_clobbers(asmn);
2200                 ident             *asm_text   = get_ASM_text(asmn);
2201                 ir_asm_constraint *new_outputs
2202                         = ALLOCAN(ir_asm_constraint, n_outs+n_64bit_outs);
2203                 ir_node           *new_asm;
2204                 const ir_edge_t   *edge;
2205                 const ir_edge_t   *next;
2206
2207                 for (i = 0; i < n_outs; ++i) {
2208                         const ir_asm_constraint *constraint = &output_constraints[i];
2209                         if (constraint->mode == high_signed || constraint->mode == high_unsigned) {
2210                                 new_outputs[new_n_outs].pos        = constraint->pos;
2211                                 new_outputs[new_n_outs].constraint = new_id_from_str("=a");
2212                                 new_outputs[new_n_outs].mode       = env->low_unsigned;
2213                                 proj_map[i] = new_n_outs;
2214                                 ++new_n_outs;
2215                                 new_outputs[new_n_outs].pos        = constraint->pos;
2216                                 new_outputs[new_n_outs].constraint = new_id_from_str("=d");
2217                                 if (constraint->mode == high_signed)
2218                                         new_outputs[new_n_outs].mode = env->low_signed;
2219                                 else
2220                                         new_outputs[new_n_outs].mode = env->low_unsigned;
2221                                 ++new_n_outs;
2222                         } else {
2223                                 new_outputs[new_n_outs] = *constraint;
2224                                 proj_map[i] = new_n_outs;
2225                                 ++new_n_outs;
2226                         }
2227                 }
2228                 assert(new_n_outs == n_outs+(int)n_64bit_outs);
2229
2230                 new_asm = new_rd_ASM(dbgi, block, arity, in, input_constraints,
2231                                      new_n_outs, new_outputs, n_clobber, clobbers,
2232                                      asm_text);
2233
2234                 foreach_out_edge_safe(asmn, edge, next) {
2235                         ir_node *proj      = get_edge_src_irn(edge);
2236                         ir_mode *proj_mode = get_irn_mode(proj);
2237                         long     pn;
2238
2239                         if (!is_Proj(proj))
2240                                 continue;
2241                         pn = get_Proj_proj(proj);
2242
2243                         if (pn < n_outs)
2244                                 pn = proj_map[pn];
2245                         else
2246                                 pn = new_n_outs + pn - n_outs;
2247
2248                         if (proj_mode == high_signed || proj_mode == high_unsigned) {
2249                                 ir_mode *high_mode
2250                                         = proj_mode == high_signed ? env->low_signed : env->low_unsigned;
2251                                 ir_node *np_low  = new_r_Proj(new_asm, env->low_unsigned, pn);
2252                                 ir_node *np_high = new_r_Proj(new_asm, high_mode, pn+1);
2253                                 ir_set_dw_lowered(proj, np_low, np_high);
2254                         } else {
2255                                 ir_node *np = new_r_Proj(new_asm, proj_mode, pn);
2256                                 exchange(proj, np);
2257                         }
2258                 }
2259         }
2260 }
2261
2262 /**
2263  * Translate a Sel node.
2264  */
2265 static void lower_Sel(ir_node *sel, ir_mode *mode)
2266 {
2267         (void) mode;
2268
2269         /* we must only lower value parameter Sels if we change the
2270            value parameter type. */
2271         if (env->value_param_tp != NULL) {
2272                 ir_entity *ent = get_Sel_entity(sel);
2273             if (get_entity_owner(ent) == env->value_param_tp) {
2274                         size_t pos = get_entity_arg_idx(ent);
2275
2276                         ent = get_method_value_param_ent(env->l_mtp, pos);
2277                         set_Sel_entity(sel, ent);
2278                 }
2279         }
2280 }
2281
2282 /**
2283  * check for opcodes that must always be lowered.
2284  */
2285 static bool always_lower(unsigned code)
2286 {
2287         switch (code) {
2288         case iro_ASM:
2289         case iro_Proj:
2290         case iro_Start:
2291         case iro_Call:
2292         case iro_Return:
2293         case iro_Cond:
2294         case iro_Conv:
2295         case iro_Sel:
2296                 return true;
2297         default:
2298                 return false;
2299         }
2300 }
2301
2302 /**
2303  * Compare two op_mode_entry_t's.
2304  */
2305 static int cmp_op_mode(const void *elt, const void *key, size_t size)
2306 {
2307         const op_mode_entry_t *e1 = (const op_mode_entry_t*)elt;
2308         const op_mode_entry_t *e2 = (const op_mode_entry_t*)key;
2309         (void) size;
2310
2311         return (e1->op != e2->op) | (e1->imode != e2->imode) | (e1->omode != e2->omode);
2312 }
2313
2314 /**
2315  * Compare two conv_tp_entry_t's.
2316  */
2317 static int cmp_conv_tp(const void *elt, const void *key, size_t size)
2318 {
2319         const conv_tp_entry_t *e1 = (const conv_tp_entry_t*)elt;
2320         const conv_tp_entry_t *e2 = (const conv_tp_entry_t*)key;
2321         (void) size;
2322
2323         return (e1->imode != e2->imode) | (e1->omode != e2->omode);
2324 }
2325
2326 /**
2327  * Enter a lowering function into an ir_op.
2328  */
2329 void ir_register_dw_lower_function(ir_op *op, lower_dw_func func)
2330 {
2331         op->ops.generic = (op_func)func;
2332 }
2333
2334 /**
2335  * Returns non-zero if a method type must be lowered.
2336  *
2337  * @param mtp  the method type
2338  */
2339 static bool mtp_must_be_lowered(ir_type *mtp)
2340 {
2341         size_t i, n_params = get_method_n_params(mtp);
2342
2343         /* first check if we have parameters that must be fixed */
2344         for (i = 0; i < n_params; ++i) {
2345                 ir_type *tp = get_method_param_type(mtp, i);
2346
2347                 if (is_Primitive_type(tp)) {
2348                         ir_mode *mode = get_type_mode(tp);
2349
2350                         if (mode == env->high_signed || mode == env->high_unsigned)
2351                                 return true;
2352                 }
2353         }
2354         return false;
2355 }
2356
2357 /* Determine which modes need to be lowered */
2358 static void setup_modes(void)
2359 {
2360         unsigned           size_bits           = env->params->doubleword_size;
2361         ir_mode           *doubleword_signed   = NULL;
2362         ir_mode           *doubleword_unsigned = NULL;
2363         size_t             n_modes             = get_irp_n_modes();
2364         ir_mode_arithmetic arithmetic;
2365         unsigned           modulo_shift;
2366         size_t             i;
2367
2368         /* search for doubleword modes... */
2369         for (i = 0; i < n_modes; ++i) {
2370                 ir_mode *mode = get_irp_mode(i);
2371                 if (!mode_is_int(mode))
2372                         continue;
2373                 if (get_mode_size_bits(mode) != size_bits)
2374                         continue;
2375                 if (mode_is_signed(mode)) {
2376                         if (doubleword_signed != NULL) {
2377                                 /* sigh - the lowerer should really just lower all mode with
2378                                  * size_bits it finds. Unfortunately this required a bigger
2379                                  * rewrite. */
2380                                 panic("multiple double word signed modes found");
2381                         }
2382                         doubleword_signed = mode;
2383                 } else {
2384                         if (doubleword_unsigned != NULL) {
2385                                 /* sigh - the lowerer should really just lower all mode with
2386                                  * size_bits it finds. Unfortunately this required a bigger
2387                                  * rewrite. */
2388                                 panic("multiple double word unsigned modes found");
2389                         }
2390                         doubleword_unsigned = mode;
2391                 }
2392         }
2393         if (doubleword_signed == NULL || doubleword_unsigned == NULL) {
2394                 panic("Couldn't find doubleword modes");
2395         }
2396
2397         arithmetic   = get_mode_arithmetic(doubleword_signed);
2398         modulo_shift = get_mode_modulo_shift(doubleword_signed);
2399
2400         assert(get_mode_size_bits(doubleword_unsigned) == size_bits);
2401         assert(size_bits % 2 == 0);
2402         assert(get_mode_sign(doubleword_signed) == 1);
2403         assert(get_mode_sign(doubleword_unsigned) == 0);
2404         assert(get_mode_sort(doubleword_signed) == irms_int_number);
2405         assert(get_mode_sort(doubleword_unsigned) == irms_int_number);
2406         assert(get_mode_arithmetic(doubleword_unsigned) == arithmetic);
2407         assert(get_mode_modulo_shift(doubleword_unsigned) == modulo_shift);
2408
2409         /* try to guess a sensible modulo shift for the new mode.
2410          * (This is IMO another indication that this should really be a node
2411          *  attribute instead of a mode thing) */
2412         if (modulo_shift == size_bits) {
2413                 modulo_shift = modulo_shift / 2;
2414         } else if (modulo_shift == 0) {
2415                 /* fine */
2416         } else {
2417                 panic("Don't know what new modulo shift to use for lowered doubleword mode");
2418         }
2419         size_bits /= 2;
2420
2421         /* produce lowered modes */
2422         env->high_signed   = doubleword_signed;
2423         env->high_unsigned = doubleword_unsigned;
2424         env->low_signed    = new_ir_mode("WS", irms_int_number, size_bits, 1,
2425                                          arithmetic, modulo_shift);
2426         env->low_unsigned  = new_ir_mode("WU", irms_int_number, size_bits, 0,
2427                                          arithmetic, modulo_shift);
2428 }
2429
2430 static void enqueue_preds(ir_node *node)
2431 {
2432         int arity = get_irn_arity(node);
2433         int i;
2434
2435         for (i = 0; i < arity; ++i) {
2436                 ir_node *pred = get_irn_n(node, i);
2437                 pdeq_putr(env->waitq, pred);
2438         }
2439 }
2440
2441 static void lower_node(ir_node *node)
2442 {
2443         int              arity;
2444         int              i;
2445         lower_dw_func    func;
2446         ir_op           *op;
2447         ir_mode         *mode;
2448         unsigned         idx;
2449         lower64_entry_t *entry;
2450
2451         if (irn_visited_else_mark(node))
2452                 return;
2453
2454         /* cycles are always broken at Phi and Block nodes. So we don't need special
2455          * magic in all the other lower functions */
2456         if (is_Block(node)) {
2457                 enqueue_preds(node);
2458                 return;
2459         } else if (is_Phi(node)) {
2460                 lower_Phi(node);
2461                 return;
2462         }
2463
2464         /* depth-first: descend into operands */
2465         if (!is_Block(node)) {
2466                 ir_node *block = get_nodes_block(node);
2467                 lower_node(block);
2468         }
2469
2470         if (!is_Cond(node)) {
2471                 arity = get_irn_arity(node);
2472                 for (i = 0; i < arity; ++i) {
2473                         ir_node *pred = get_irn_n(node, i);
2474                         lower_node(pred);
2475                 }
2476         }
2477
2478         op   = get_irn_op(node);
2479         func = (lower_dw_func) op->ops.generic;
2480         if (func == NULL)
2481                 return;
2482
2483         idx   = get_irn_idx(node);
2484         entry = idx < env->n_entries ? env->entries[idx] : NULL;
2485         if (entry != NULL || always_lower(get_irn_opcode(node))) {
2486                 mode = get_irn_op_mode(node);
2487                 if (mode == env->high_signed) {
2488                         mode = env->low_signed;
2489                 } else {
2490                         mode = env->low_unsigned;
2491                 }
2492                 DB((dbg, LEVEL_1, "  %+F\n", node));
2493                 func(node, mode);
2494         }
2495 }
2496
2497 static void clear_node_and_phi_links(ir_node *node, void *data)
2498 {
2499         (void) data;
2500         if (get_irn_mode(node) == mode_T) {
2501                 set_irn_link(node, node);
2502         } else {
2503                 set_irn_link(node, NULL);
2504         }
2505         if (is_Block(node))
2506                 set_Block_phis(node, NULL);
2507         else if (is_Phi(node))
2508                 set_Phi_next(node, NULL);
2509 }
2510
2511 static void lower_irg(ir_graph *irg)
2512 {
2513         ir_entity *ent;
2514         ir_type   *mtp;
2515         unsigned   n_idx;
2516
2517         obstack_init(&env->obst);
2518
2519         /* just here for debugging */
2520         current_ir_graph = irg;
2521         edges_assure(irg);
2522
2523         n_idx = get_irg_last_idx(irg);
2524         n_idx = n_idx + (n_idx >> 2);  /* add 25% */
2525         env->n_entries = n_idx;
2526         env->entries   = NEW_ARR_F(lower64_entry_t*, n_idx);
2527         memset(env->entries, 0, sizeof(env->entries[0]) * n_idx);
2528
2529         env->irg            = irg;
2530         env->l_mtp          = NULL;
2531         env->flags          = 0;
2532         env->value_param_tp = NULL;
2533
2534         ent = get_irg_entity(irg);
2535         mtp = get_entity_type(ent);
2536
2537         if (mtp_must_be_lowered(mtp)) {
2538                 ir_type *ltp = lower_mtp(mtp);
2539                 /* Do not update the entity type yet, this will be done by lower_Start! */
2540                 env->flags |= MUST_BE_LOWERED;
2541                 env->l_mtp = ltp;
2542                 env->value_param_tp = get_method_value_param_type(mtp);
2543         }
2544
2545         /* first step: link all nodes and allocate data */
2546         ir_reserve_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2547         visit_all_identities(irg, clear_node_and_phi_links, NULL);
2548         irg_walk_graph(irg, NULL, prepare_links_and_handle_rotl, env);
2549
2550         if (env->flags & MUST_BE_LOWERED) {
2551                 size_t i;
2552                 ir_reserve_resources(irg, IR_RESOURCE_IRN_VISITED);
2553                 inc_irg_visited(irg);
2554
2555                 assert(pdeq_empty(env->waitq));
2556                 pdeq_putr(env->waitq, get_irg_end(irg));
2557
2558                 env->lowered_phis = NEW_ARR_F(ir_node*, 0);
2559                 while (!pdeq_empty(env->waitq)) {
2560                         ir_node *node = (ir_node*)pdeq_getl(env->waitq);
2561                         lower_node(node);
2562                 }
2563
2564                 /* we need to fixup phis */
2565                 for (i = 0; i < ARR_LEN(env->lowered_phis); ++i) {
2566                         ir_node *phi = env->lowered_phis[i];
2567                         fixup_phi(phi);
2568                 }
2569                 DEL_ARR_F(env->lowered_phis);
2570
2571
2572                 ir_free_resources(irg, IR_RESOURCE_IRN_VISITED);
2573
2574                 if (env->flags & CF_CHANGED) {
2575                         /* control flow changed, dominance info is invalid */
2576                         set_irg_doms_inconsistent(irg);
2577                         set_irg_extblk_inconsistent(irg);
2578                 }
2579                 edges_deactivate(irg);
2580         }
2581
2582         ir_free_resources(irg, IR_RESOURCE_PHI_LIST | IR_RESOURCE_IRN_LINK);
2583
2584         DEL_ARR_F(env->entries);
2585         obstack_free(&env->obst, NULL);
2586 }
2587
2588 static const lwrdw_param_t *param;
2589
2590 void ir_prepare_dw_lowering(const lwrdw_param_t *new_param)
2591 {
2592         assert(new_param != NULL);
2593         FIRM_DBG_REGISTER(dbg, "firm.lower.dw");
2594
2595         param = new_param;
2596
2597         clear_irp_opcodes_generic_func();
2598         ir_register_dw_lower_function(op_ASM,     lower_ASM);
2599         ir_register_dw_lower_function(op_Add,     lower_binop);
2600         ir_register_dw_lower_function(op_And,     lower_And);
2601         ir_register_dw_lower_function(op_Bad,     lower_Bad);
2602         ir_register_dw_lower_function(op_Call,    lower_Call);
2603         ir_register_dw_lower_function(op_Cmp,     lower_Cmp);
2604         ir_register_dw_lower_function(op_Cond,    lower_Cond);
2605         ir_register_dw_lower_function(op_Const,   lower_Const);
2606         ir_register_dw_lower_function(op_Conv,    lower_Conv);
2607         ir_register_dw_lower_function(op_Div,     lower_Div);
2608         ir_register_dw_lower_function(op_Eor,     lower_Eor);
2609         ir_register_dw_lower_function(op_Load,    lower_Load);
2610         ir_register_dw_lower_function(op_Minus,   lower_unop);
2611         ir_register_dw_lower_function(op_Mod,     lower_Mod);
2612         ir_register_dw_lower_function(op_Mul,     lower_binop);
2613         ir_register_dw_lower_function(op_Mux,     lower_Mux);
2614         ir_register_dw_lower_function(op_Not,     lower_Not);
2615         ir_register_dw_lower_function(op_Or,      lower_Or);
2616         ir_register_dw_lower_function(op_Return,  lower_Return);
2617         ir_register_dw_lower_function(op_Sel,     lower_Sel);
2618         ir_register_dw_lower_function(op_Shl,     lower_Shl);
2619         ir_register_dw_lower_function(op_Shr,     lower_Shr);
2620         ir_register_dw_lower_function(op_Shrs,    lower_Shrs);
2621         ir_register_dw_lower_function(op_Start,   lower_Start);
2622         ir_register_dw_lower_function(op_Store,   lower_Store);
2623         ir_register_dw_lower_function(op_Sub,     lower_binop);
2624         ir_register_dw_lower_function(op_Unknown, lower_Unknown);
2625 }
2626
2627 /*
2628  * Do the lowering.
2629  */
2630 void ir_lower_dw_ops(void)
2631 {
2632         lower_dw_env_t lenv;
2633         size_t      i, n;
2634
2635         memset(&lenv, 0, sizeof(lenv));
2636         lenv.params = param;
2637         env = &lenv;
2638
2639         setup_modes();
2640
2641         /* create the necessary maps */
2642         if (! intrinsic_fkt)
2643                 intrinsic_fkt = new_set(cmp_op_mode, iro_Last + 1);
2644         if (! conv_types)
2645                 conv_types = new_set(cmp_conv_tp, 16);
2646         if (! lowered_type)
2647                 lowered_type = pmap_create();
2648
2649         /* create a primitive unsigned and signed type */
2650         if (! tp_u)
2651                 tp_u = get_type_for_mode(lenv.low_unsigned);
2652         if (! tp_s)
2653                 tp_s = get_type_for_mode(lenv.low_signed);
2654
2655         /* create method types for the created binop calls */
2656         if (! binop_tp_u) {
2657                 binop_tp_u = new_type_method(4, 2);
2658                 set_method_param_type(binop_tp_u, 0, tp_u);
2659                 set_method_param_type(binop_tp_u, 1, tp_u);
2660                 set_method_param_type(binop_tp_u, 2, tp_u);
2661                 set_method_param_type(binop_tp_u, 3, tp_u);
2662                 set_method_res_type(binop_tp_u, 0, tp_u);
2663                 set_method_res_type(binop_tp_u, 1, tp_u);
2664         }
2665         if (! binop_tp_s) {
2666                 binop_tp_s = new_type_method(4, 2);
2667                 if (env->params->little_endian) {
2668                         set_method_param_type(binop_tp_s, 0, tp_u);
2669                         set_method_param_type(binop_tp_s, 1, tp_s);
2670                         set_method_param_type(binop_tp_s, 2, tp_u);
2671                         set_method_param_type(binop_tp_s, 3, tp_s);
2672                         set_method_res_type(binop_tp_s, 0, tp_u);
2673                         set_method_res_type(binop_tp_s, 1, tp_s);
2674                 } else {
2675                         set_method_param_type(binop_tp_s, 0, tp_s);
2676                         set_method_param_type(binop_tp_s, 1, tp_u);
2677                         set_method_param_type(binop_tp_s, 2, tp_s);
2678                         set_method_param_type(binop_tp_s, 3, tp_u);
2679                         set_method_res_type(binop_tp_s, 0, tp_s);
2680                         set_method_res_type(binop_tp_s, 1, tp_u);
2681                 }
2682         }
2683         if (! unop_tp_u) {
2684                 unop_tp_u = new_type_method(2, 2);
2685                 set_method_param_type(unop_tp_u, 0, tp_u);
2686                 set_method_param_type(unop_tp_u, 1, tp_u);
2687                 set_method_res_type(unop_tp_u, 0, tp_u);
2688                 set_method_res_type(unop_tp_u, 1, tp_u);
2689         }
2690         if (! unop_tp_s) {
2691                 unop_tp_s = new_type_method(2, 2);
2692                 if (env->params->little_endian) {
2693                         set_method_param_type(unop_tp_s, 0, tp_u);
2694                         set_method_param_type(unop_tp_s, 1, tp_s);
2695                         set_method_res_type(unop_tp_s, 0, tp_u);
2696                         set_method_res_type(unop_tp_s, 1, tp_s);
2697                 } else {
2698                         set_method_param_type(unop_tp_s, 0, tp_s);
2699                         set_method_param_type(unop_tp_s, 1, tp_u);
2700                         set_method_res_type(unop_tp_s, 0, tp_s);
2701                         set_method_res_type(unop_tp_s, 1, tp_u);
2702                 }
2703         }
2704
2705         lenv.tv_mode_bytes = new_tarval_from_long(param->doubleword_size/(2*8), lenv.low_unsigned);
2706         lenv.tv_mode_bits  = new_tarval_from_long(param->doubleword_size/2, lenv.low_unsigned);
2707         lenv.waitq         = new_pdeq();
2708         lenv.first_id      = new_id_from_chars(param->little_endian ? ".l" : ".h", 2);
2709         lenv.next_id       = new_id_from_chars(param->little_endian ? ".h" : ".l", 2);
2710
2711         /* transform all graphs */
2712         for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
2713                 ir_graph *irg = get_irp_irg(i);
2714                 lower_irg(irg);
2715         }
2716         del_pdeq(lenv.waitq);
2717
2718         env = NULL;
2719 }
2720
2721 /* Default implementation. */
2722 ir_entity *def_create_intrinsic_fkt(ir_type *method, const ir_op *op,
2723                                     const ir_mode *imode, const ir_mode *omode,
2724                                     void *context)
2725 {
2726         char buf[64];
2727         ident *id;
2728         ir_entity *ent;
2729         (void) context;
2730
2731         if (imode == omode) {
2732                 snprintf(buf, sizeof(buf), "__l%s%s", get_op_name(op), get_mode_name(imode));
2733         } else {
2734                 snprintf(buf, sizeof(buf), "__l%s%s%s", get_op_name(op),
2735                         get_mode_name(imode), get_mode_name(omode));
2736         }
2737         id = new_id_from_str(buf);
2738
2739         ent = new_entity(get_glob_type(), id, method);
2740         set_entity_ld_ident(ent, get_entity_ident(ent));
2741         set_entity_visibility(ent, ir_visibility_external);
2742         return ent;
2743 }