ir.c

   1 /*
   2  * Copyright (C) 2012
   3  *     Wolfgang Bumiller
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy of
   6  * this software and associated documentation files (the "Software"), to deal in
   7  * the Software without restriction, including without limitation the rights to
   8  * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is furnished to do
  10  * so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in all
  13  * copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  */
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include "gmqcc.h"
  26 #include "ir.h"
  27
  28 /***********************************************************************
  29  *IR Builder
  30  */
  31
  32 ir_builder* ir_builder_new(const char *modulename)
  33 {
  34     ir_builder* self;
  35
  36     self = (ir_builder*)mem_a(sizeof(*self));
  37     MEM_VECTOR_INIT(self, functions);
  38     MEM_VECTOR_INIT(self, globals);
  39     self->name = NULL;
  40     if (!ir_builder_set_name(self, modulename)) {
  41         mem_d(self);
  42         return NULL;
  43     }
  44
  45     /* globals which always exist */
  46
  47     /* for now we give it a vector size */
  48     ir_builder_create_global(self, "OFS_RETURN", TYPE_VARIANT);
  49
  50     return self;
  51 }
  52
  53 MEM_VEC_FUNCTIONS(ir_builder, ir_value*, globals)
  54 MEM_VEC_FUNCTIONS(ir_builder, ir_function*, functions)
  55
  56 void ir_builder_delete(ir_builder* self)
  57 {
  58     size_t i;
  59     mem_d((void*)self->name);
  60     for (i = 0; i != self->functions_count; ++i) {
  61         ir_function_delete(self->functions[i]);
  62     }
  63     MEM_VECTOR_CLEAR(self, functions);
  64     for (i = 0; i != self->globals_count; ++i) {
  65         ir_value_delete(self->globals[i]);
  66     }
  67     MEM_VECTOR_CLEAR(self, globals);
  68     mem_d(self);
  69 }
  70
  71 bool ir_builder_set_name(ir_builder *self, const char *name)
  72 {
  73     if (self->name)
  74         mem_d((void*)self->name);
  75     self->name = util_strdup(name);
  76     return !!self->name;
  77 }
  78
  79 ir_function* ir_builder_get_function(ir_builder *self, const char *name)
  80 {
  81     size_t i;
  82     for (i = 0; i < self->functions_count; ++i) {
  83         if (!strcmp(name, self->functions[i]->name))
  84             return self->functions[i];
  85     }
  86     return NULL;
  87 }
  88
  89 ir_function* ir_builder_create_function(ir_builder *self, const char *name)
  90 {
  91     ir_function *fn = ir_builder_get_function(self, name);
  92     if (fn) {
  93         return NULL;
  94     }
  95
  96     fn = ir_function_new(self);
  97     if (!ir_function_set_name(fn, name) ||
  98         !ir_builder_functions_add(self, fn) )
  99     {
 100         ir_function_delete(fn);
 101         return NULL;
 102     }
 103     return fn;
 104 }
 105
 106 ir_value* ir_builder_get_global(ir_builder *self, const char *name)
 107 {
 108     size_t i;
 109     for (i = 0; i < self->globals_count; ++i) {
 110         if (!strcmp(self->globals[i]->name, name))
 111             return self->globals[i];
 112     }
 113     return NULL;
 114 }
 115
 116 ir_value* ir_builder_create_global(ir_builder *self, const char *name, int vtype)
 117 {
 118     ir_value *ve = ir_builder_get_global(self, name);
 119     if (ve) {
 120         return NULL;
 121     }
 122
 123     ve = ir_value_var(name, store_global, vtype);
 124     if (!ir_builder_globals_add(self, ve)) {
 125         ir_value_delete(ve);
 126         return NULL;
 127     }
 128     return ve;
 129 }
 130
 131 /***********************************************************************
 132  *IR Function
 133  */
 134
 135 bool ir_function_naive_phi(ir_function*);
 136 void ir_function_enumerate(ir_function*);
 137 bool ir_function_calculate_liferanges(ir_function*);
 138
 139 ir_function* ir_function_new(ir_builder* owner)
 140 {
 141     ir_function *self;
 142     self = (ir_function*)mem_a(sizeof(*self));
 143     self->name = NULL;
 144     if (!ir_function_set_name(self, "<@unnamed>")) {
 145         mem_d(self);
 146         return NULL;
 147     }
 148     self->owner = owner;
 149     self->context.file = "<@no context>";
 150     self->context.line = 0;
 151     self->retype = TYPE_VOID;
 152     MEM_VECTOR_INIT(self, params);
 153     MEM_VECTOR_INIT(self, blocks);
 154     MEM_VECTOR_INIT(self, values);
 155     MEM_VECTOR_INIT(self, locals);
 156
 157     self->run_id = 0;
 158     return self;
 159 }
 160 MEM_VEC_FUNCTIONS(ir_function, ir_value*, values)
 161 MEM_VEC_FUNCTIONS(ir_function, ir_block*, blocks)
 162 MEM_VEC_FUNCTIONS(ir_function, ir_value*, locals)
 163
 164 bool ir_function_set_name(ir_function *self, const char *name)
 165 {
 166     if (self->name)
 167         mem_d((void*)self->name);
 168     self->name = util_strdup(name);
 169     return !!self->name;
 170 }
 171
 172 void ir_function_delete(ir_function *self)
 173 {
 174     size_t i;
 175     mem_d((void*)self->name);
 176
 177     for (i = 0; i != self->blocks_count; ++i)
 178         ir_block_delete(self->blocks[i]);
 179     MEM_VECTOR_CLEAR(self, blocks);
 180
 181     MEM_VECTOR_CLEAR(self, params);
 182
 183     for (i = 0; i != self->values_count; ++i)
 184         ir_value_delete(self->values[i]);
 185     MEM_VECTOR_CLEAR(self, values);
 186
 187     for (i = 0; i != self->locals_count; ++i)
 188         ir_value_delete(self->locals[i]);
 189     MEM_VECTOR_CLEAR(self, locals);
 190
 191     mem_d(self);
 192 }
 193
 194 bool GMQCC_WARN ir_function_collect_value(ir_function *self, ir_value *v)
 195 {
 196     return ir_function_values_add(self, v);
 197 }
 198
 199 ir_block* ir_function_create_block(ir_function *self, const char *label)
 200 {
 201     ir_block* bn = ir_block_new(self, label);
 202     memcpy(&bn->context, &self->context, sizeof(self->context));
 203     if (!ir_function_blocks_add(self, bn)) {
 204         ir_block_delete(bn);
 205         return NULL;
 206     }
 207     return bn;
 208 }
 209
 210 bool ir_function_finalize(ir_function *self)
 211 {
 212     if (!ir_function_naive_phi(self))
 213         return false;
 214
 215     ir_function_enumerate(self);
 216
 217     if (!ir_function_calculate_liferanges(self))
 218         return false;
 219     return true;
 220 }
 221
 222 ir_value* ir_function_get_local(ir_function *self, const char *name)
 223 {
 224     size_t i;
 225     for (i = 0; i < self->locals_count; ++i) {
 226         if (!strcmp(self->locals[i]->name, name))
 227             return self->locals[i];
 228     }
 229     return NULL;
 230 }
 231
 232 ir_value* ir_function_create_local(ir_function *self, const char *name, int vtype)
 233 {
 234     ir_value *ve = ir_function_get_local(self, name);
 235     if (ve) {
 236         return NULL;
 237     }
 238
 239     ve = ir_value_var(name, store_local, vtype);
 240     if (!ir_function_locals_add(self, ve)) {
 241         ir_value_delete(ve);
 242         return NULL;
 243     }
 244     return ve;
 245 }
 246
 247 /***********************************************************************
 248  *IR Block
 249  */
 250
 251 ir_block* ir_block_new(ir_function* owner, const char *name)
 252 {
 253     ir_block *self;
 254     self = (ir_block*)mem_a(sizeof(*self));
 255     self->label = NULL;
 256     if (!ir_block_set_label(self, name)) {
 257         mem_d(self);
 258         return NULL;
 259     }
 260     self->owner = owner;
 261     self->context.file = "<@no context>";
 262     self->context.line = 0;
 263     self->final = false;
 264     MEM_VECTOR_INIT(self, instr);
 265     MEM_VECTOR_INIT(self, entries);
 266     MEM_VECTOR_INIT(self, exits);
 267
 268     self->eid = 0;
 269     self->is_return = false;
 270     self->run_id = 0;
 271     MEM_VECTOR_INIT(self, living);
 272     return self;
 273 }
 274 MEM_VEC_FUNCTIONS(ir_block, ir_instr*, instr)
 275 MEM_VEC_FUNCTIONS_ALL(ir_block, ir_block*, entries)
 276 MEM_VEC_FUNCTIONS_ALL(ir_block, ir_block*, exits)
 277 MEM_VEC_FUNCTIONS_ALL(ir_block, ir_value*, living)
 278
 279 void ir_block_delete(ir_block* self)
 280 {
 281     size_t i;
 282     mem_d(self->label);
 283     for (i = 0; i != self->instr_count; ++i)
 284         ir_instr_delete(self->instr[i]);
 285     MEM_VECTOR_CLEAR(self, instr);
 286     MEM_VECTOR_CLEAR(self, entries);
 287     MEM_VECTOR_CLEAR(self, exits);
 288     MEM_VECTOR_CLEAR(self, living);
 289     mem_d(self);
 290 }
 291
 292 bool ir_block_set_label(ir_block *self, const char *name)
 293 {
 294     if (self->label)
 295         mem_d((void*)self->label);
 296     self->label = util_strdup(name);
 297     return !!self->label;
 298 }
 299
 300 /***********************************************************************
 301  *IR Instructions
 302  */
 303
 304 ir_instr* ir_instr_new(ir_block* owner, int op)
 305 {
 306     ir_instr *self;
 307     self = (ir_instr*)mem_a(sizeof(*self));
 308     self->owner = owner;
 309     self->context.file = "<@no context>";
 310     self->context.line = 0;
 311     self->opcode = op;
 312     self->_ops[0] = NULL;
 313     self->_ops[1] = NULL;
 314     self->_ops[2] = NULL;
 315     self->bops[0] = NULL;
 316     self->bops[1] = NULL;
 317     MEM_VECTOR_INIT(self, phi);
 318
 319     self->eid = 0;
 320     return self;
 321 }
 322 MEM_VEC_FUNCTIONS(ir_instr, ir_phi_entry_t, phi)
 323
 324 void ir_instr_delete(ir_instr *self)
 325 {
 326     size_t i;
 327     /* The following calls can only delete from
 328      * vectors, we still want to delete this instruction
 329      * so ignore the return value. Since with the warn_unused_result attribute
 330      * gcc doesn't care about an explicit: (void)foo(); to ignore the result,
 331      * I have to improvise here and use if(foo());
 332      */
 333     for (i = 0; i < self->phi_count; ++i) {
 334         size_t idx;
 335         if (ir_value_writes_find(self->phi[i].value, self, &idx))
 336             if (ir_value_writes_remove(self->phi[i].value, idx)) GMQCC_SUPRESS_EMPTY_BODY;
 337         if (ir_value_reads_find(self->phi[i].value, self, &idx))
 338             if (ir_value_reads_remove (self->phi[i].value, idx)) GMQCC_SUPRESS_EMPTY_BODY;
 339     }
 340     MEM_VECTOR_CLEAR(self, phi);
 341     if (ir_instr_op(self, 0, NULL, false)) GMQCC_SUPRESS_EMPTY_BODY;
 342     if (ir_instr_op(self, 1, NULL, false)) GMQCC_SUPRESS_EMPTY_BODY;
 343     if (ir_instr_op(self, 2, NULL, false)) GMQCC_SUPRESS_EMPTY_BODY;
 344     mem_d(self);
 345 }
 346
 347 bool ir_instr_op(ir_instr *self, int op, ir_value *v, bool writing)
 348 {
 349     if (self->_ops[op]) {
 350         size_t idx;
 351         if (writing && ir_value_writes_find(self->_ops[op], self, &idx))
 352         {
 353             if (!ir_value_writes_remove(self->_ops[op], idx))
 354                 return false;
 355         }
 356         else if (ir_value_reads_find(self->_ops[op], self, &idx))
 357         {
 358             if (!ir_value_reads_remove(self->_ops[op], idx))
 359                 return false;
 360         }
 361     }
 362     if (v) {
 363         if (writing) {
 364             if (!ir_value_writes_add(v, self))
 365                 return false;
 366         } else {
 367             if (!ir_value_reads_add(v, self))
 368                 return false;
 369         }
 370     }
 371     self->_ops[op] = v;
 372     return true;
 373 }
 374
 375 /***********************************************************************
 376  *IR Value
 377  */
 378
 379 ir_value* ir_value_var(const char *name, int storetype, int vtype)
 380 {
 381     ir_value *self;
 382     self = (ir_value*)mem_a(sizeof(*self));
 383     self->vtype = vtype;
 384     self->store = storetype;
 385     MEM_VECTOR_INIT(self, reads);
 386     MEM_VECTOR_INIT(self, writes);
 387     self->isconst = false;
 388     self->context.file = "<@no context>";
 389     self->context.line = 0;
 390     self->name = NULL;
 391     ir_value_set_name(self, name);
 392
 393     MEM_VECTOR_INIT(self, life);
 394     return self;
 395 }
 396 MEM_VEC_FUNCTIONS(ir_value, ir_life_entry_t, life)
 397 MEM_VEC_FUNCTIONS_ALL(ir_value, ir_instr*, reads)
 398 MEM_VEC_FUNCTIONS_ALL(ir_value, ir_instr*, writes)
 399
 400 ir_value* ir_value_out(ir_function *owner, const char *name, int storetype, int vtype)
 401 {
 402     ir_value *v = ir_value_var(name, storetype, vtype);
 403     if (!v)
 404         return NULL;
 405     if (!ir_function_collect_value(owner, v))
 406     {
 407         ir_value_delete(v);
 408         return NULL;
 409     }
 410     return v;
 411 }
 412
 413 void ir_value_delete(ir_value* self)
 414 {
 415     mem_d((void*)self->name);
 416     if (self->isconst)
 417     {
 418         if (self->vtype == TYPE_STRING)
 419             mem_d((void*)self->constval.vstring);
 420     }
 421     MEM_VECTOR_CLEAR(self, reads);
 422     MEM_VECTOR_CLEAR(self, writes);
 423     MEM_VECTOR_CLEAR(self, life);
 424     mem_d(self);
 425 }
 426
 427 void ir_value_set_name(ir_value *self, const char *name)
 428 {
 429     if (self->name)
 430         mem_d((void*)self->name);
 431     self->name = util_strdup(name);
 432 }
 433
 434 bool ir_value_set_float(ir_value *self, float f)
 435 {
 436     if (self->vtype != TYPE_FLOAT)
 437         return false;
 438     self->constval.vfloat = f;
 439     self->isconst = true;
 440     return true;
 441 }
 442
 443 bool ir_value_set_vector(ir_value *self, vector v)
 444 {
 445     if (self->vtype != TYPE_VECTOR)
 446         return false;
 447     self->constval.vvec = v;
 448     self->isconst = true;
 449     return true;
 450 }
 451
 452 bool ir_value_set_string(ir_value *self, const char *str)
 453 {
 454     if (self->vtype != TYPE_STRING)
 455         return false;
 456     self->constval.vstring = util_strdup(str);
 457     self->isconst = true;
 458     return true;
 459 }
 460
 461 #if 0
 462 bool ir_value_set_int(ir_value *self, int i)
 463 {
 464     if (self->vtype != TYPE_INTEGER)
 465         return false;
 466     self->constval.vint = i;
 467     self->isconst = true;
 468     return true;
 469 }
 470 #endif
 471
 472 bool ir_value_lives(ir_value *self, size_t at)
 473 {
 474     size_t i;
 475     for (i = 0; i < self->life_count; ++i)
 476     {
 477         ir_life_entry_t *life = &self->life[i];
 478         if (life->start <= at && at <= life->end)
 479             return true;
 480         if (life->start > at) /* since it's ordered */
 481             return false;
 482     }
 483     return false;
 484 }
 485
 486 bool ir_value_life_insert(ir_value *self, size_t idx, ir_life_entry_t e)
 487 {
 488     size_t k;
 489     if (!ir_value_life_add(self, e)) /* naive... */
 490         return false;
 491     for (k = self->life_count-1; k > idx; --k)
 492         self->life[k] = self->life[k-1];
 493     self->life[idx] = e;
 494     return true;
 495 }
 496
 497 bool ir_value_life_merge(ir_value *self, size_t s)
 498 {
 499     size_t i;
 500     ir_life_entry_t *life = NULL;
 501     ir_life_entry_t *before = NULL;
 502     ir_life_entry_t new_entry;
 503
 504     /* Find the first range >= s */
 505     for (i = 0; i < self->life_count; ++i)
 506     {
 507         before = life;
 508         life = &self->life[i];
 509         if (life->start > s)
 510             break;
 511     }
 512     /* nothing found? append */
 513     if (i == self->life_count) {
 514         ir_life_entry_t e;
 515         if (life && life->end+1 == s)
 516         {
 517             /* previous life range can be merged in */
 518             life->end++;
 519             return true;
 520         }
 521         if (life && life->end >= s)
 522             return false;
 523         e.start = e.end = s;
 524         if (!ir_value_life_add(self, e))
 525             return false; /* failing */
 526         return true;
 527     }
 528     /* found */
 529     if (before)
 530     {
 531         if (before->end + 1 == s &&
 532             life->start - 1 == s)
 533         {
 534             /* merge */
 535             before->end = life->end;
 536             if (!ir_value_life_remove(self, i))
 537                 return false; /* failing */
 538             return true;
 539         }
 540         if (before->end + 1 == s)
 541         {
 542             /* extend before */
 543             before->end++;
 544             return true;
 545         }
 546         /* already contained */
 547         if (before->end >= s)
 548             return false;
 549     }
 550     /* extend */
 551     if (life->start - 1 == s)
 552     {
 553         life->start--;
 554         return true;
 555     }
 556     /* insert a new entry */
 557     new_entry.start = new_entry.end = s;
 558     return ir_value_life_insert(self, i, new_entry);
 559 }
 560
 561 /***********************************************************************
 562  *IR main operations
 563  */
 564
 565 bool ir_block_create_store_op(ir_block *self, int op, ir_value *target, ir_value *what)
 566 {
 567     if (target->store == store_value) {
 568         fprintf(stderr, "cannot store to an SSA value\n");
 569         return false;
 570     } else {
 571         ir_instr *in = ir_instr_new(self, op);
 572         if (!in)
 573             return false;
 574         if (!ir_instr_op(in, 0, target, true) ||
 575             !ir_instr_op(in, 1, what, false)  ||
 576             !ir_block_instr_add(self, in) )
 577         {
 578             return false;
 579         }
 580         return true;
 581     }
 582 }
 583
 584 bool ir_block_create_store(ir_block *self, ir_value *target, ir_value *what)
 585 {
 586     int op = 0;
 587     int vtype;
 588     if (target->vtype == TYPE_VARIANT)
 589         vtype = what->vtype;
 590     else
 591         vtype = target->vtype;
 592
 593     switch (vtype) {
 594         case TYPE_FLOAT:
 595 #if 0
 596             if (what->vtype == TYPE_INTEGER)
 597                 op = INSTR_CONV_ITOF;
 598             else
 599 #endif
 600                 op = INSTR_STORE_F;
 601             break;
 602         case TYPE_VECTOR:
 603             op = INSTR_STORE_V;
 604             break;
 605         case TYPE_ENTITY:
 606             op = INSTR_STORE_ENT;
 607             break;
 608         case TYPE_STRING:
 609             op = INSTR_STORE_S;
 610             break;
 611 #if 0
 612         case TYPE_INTEGER:
 613             if (what->vtype == TYPE_INTEGER)
 614                 op = INSTR_CONV_FTOI;
 615             else
 616                 op = INSTR_STORE_I;
 617             break;
 618 #endif
 619         case TYPE_POINTER:
 620 #if 0
 621             op = INSTR_STORE_I;
 622 #else
 623             op = INSTR_STORE_ENT;
 624 #endif
 625             break;
 626     }
 627     return ir_block_create_store_op(self, op, target, what);
 628 }
 629
 630 bool ir_block_create_return(ir_block *self, ir_value *v)
 631 {
 632     ir_instr *in;
 633     if (self->final) {
 634         fprintf(stderr, "block already ended (%s)\n", self->label);
 635         return false;
 636     }
 637     self->final = true;
 638     self->is_return = true;
 639     in = ir_instr_new(self, INSTR_RETURN);
 640     if (!in)
 641         return false;
 642
 643     if (!ir_instr_op(in, 0, v, false) ||
 644         !ir_block_instr_add(self, in) )
 645     {
 646         return false;
 647     }
 648     return true;
 649 }
 650
 651 bool ir_block_create_if(ir_block *self, ir_value *v,
 652                         ir_block *ontrue, ir_block *onfalse)
 653 {
 654     ir_instr *in;
 655     if (self->final) {
 656         fprintf(stderr, "block already ended (%s)\n", self->label);
 657         return false;
 658     }
 659     self->final = true;
 660     /*in = ir_instr_new(self, (v->vtype == TYPE_STRING ? INSTR_IF_S : INSTR_IF_F));*/
 661     in = ir_instr_new(self, VINSTR_COND);
 662     if (!in)
 663         return false;
 664
 665     if (!ir_instr_op(in, 0, v, false)) {
 666         ir_instr_delete(in);
 667         return false;
 668     }
 669
 670     in->bops[0] = ontrue;
 671     in->bops[1] = onfalse;
 672
 673     if (!ir_block_instr_add(self, in))
 674         return false;
 675
 676     if (!ir_block_exits_add(self, ontrue)    ||
 677         !ir_block_exits_add(self, onfalse)   ||
 678         !ir_block_entries_add(ontrue, self)  ||
 679         !ir_block_entries_add(onfalse, self) )
 680     {
 681         return false;
 682     }
 683     return true;
 684 }
 685
 686 bool ir_block_create_jump(ir_block *self, ir_block *to)
 687 {
 688     ir_instr *in;
 689     if (self->final) {
 690         fprintf(stderr, "block already ended (%s)\n", self->label);
 691         return false;
 692     }
 693     self->final = true;
 694     in = ir_instr_new(self, VINSTR_JUMP);
 695     if (!in)
 696         return false;
 697
 698     in->bops[0] = to;
 699     if (!ir_block_instr_add(self, in))
 700         return false;
 701
 702     if (!ir_block_exits_add(self, to) ||
 703         !ir_block_entries_add(to, self) )
 704     {
 705         return false;
 706     }
 707     return true;
 708 }
 709
 710 bool ir_block_create_goto(ir_block *self, ir_block *to)
 711 {
 712     ir_instr *in;
 713     if (self->final) {
 714         fprintf(stderr, "block already ended (%s)\n", self->label);
 715         return false;
 716     }
 717     self->final = true;
 718     in = ir_instr_new(self, INSTR_GOTO);
 719     if (!in)
 720         return false;
 721
 722     in->bops[0] = to;
 723     if (!ir_block_instr_add(self, in))
 724         return false;
 725
 726     if (!ir_block_exits_add(self, to) ||
 727         !ir_block_entries_add(to, self) )
 728     {
 729         return false;
 730     }
 731     return true;
 732 }
 733
 734 ir_instr* ir_block_create_phi(ir_block *self, const char *label, int ot)
 735 {
 736     ir_value *out;
 737     ir_instr *in;
 738     in = ir_instr_new(self, VINSTR_PHI);
 739     if (!in)
 740         return NULL;
 741     out = ir_value_out(self->owner, label, store_local, ot);
 742     if (!out) {
 743         ir_instr_delete(in);
 744         return NULL;
 745     }
 746     if (!ir_instr_op(in, 0, out, true)) {
 747         ir_instr_delete(in);
 748         ir_value_delete(out);
 749         return NULL;
 750     }
 751     if (!ir_block_instr_add(self, in)) {
 752         ir_instr_delete(in);
 753         ir_value_delete(out);
 754         return NULL;
 755     }
 756     return in;
 757 }
 758
 759 ir_value* ir_phi_value(ir_instr *self)
 760 {
 761     return self->_ops[0];
 762 }
 763
 764 bool ir_phi_add(ir_instr* self, ir_block *b, ir_value *v)
 765 {
 766     ir_phi_entry_t pe;
 767
 768     if (!ir_block_entries_find(self->owner, b, NULL)) {
 769         /* Must not be possible to cause this, otherwise the AST
 770          * is doing something wrong.
 771          */
 772         fprintf(stderr, "Invalid entry block for PHI\n");
 773         abort();
 774     }
 775
 776     pe.value = v;
 777     pe.from = b;
 778     if (!ir_value_reads_add(v, self))
 779         return false;
 780     return ir_instr_phi_add(self, pe);
 781 }
 782
 783 /* binary op related code */
 784
 785 ir_value* ir_block_create_binop(ir_block *self,
 786                                 const char *label, int opcode,
 787                                 ir_value *left, ir_value *right)
 788 {
 789     ir_value *out = NULL;
 790     ir_instr *in  = NULL;
 791
 792     int ot = TYPE_VOID;
 793     switch (opcode) {
 794         case INSTR_ADD_F:
 795         case INSTR_SUB_F:
 796         case INSTR_DIV_F:
 797         case INSTR_MUL_F:
 798         case INSTR_MUL_V:
 799         case INSTR_AND:
 800         case INSTR_OR:
 801 #if 0
 802         case INSTR_AND_I:
 803         case INSTR_AND_IF:
 804         case INSTR_AND_FI:
 805         case INSTR_OR_I:
 806         case INSTR_OR_IF:
 807         case INSTR_OR_FI:
 808 #endif
 809         case INSTR_BITAND:
 810         case INSTR_BITOR:
 811 #if 0
 812         case INSTR_SUB_S: /* -- offset of string as float */
 813         case INSTR_MUL_IF:
 814         case INSTR_MUL_FI:
 815         case INSTR_DIV_IF:
 816         case INSTR_DIV_FI:
 817         case INSTR_BITOR_IF:
 818         case INSTR_BITOR_FI:
 819         case INSTR_BITAND_FI:
 820         case INSTR_BITAND_IF:
 821         case INSTR_EQ_I:
 822         case INSTR_NE_I:
 823 #endif
 824             ot = TYPE_FLOAT;
 825             break;
 826 #if 0
 827         case INSTR_ADD_I:
 828         case INSTR_ADD_IF:
 829         case INSTR_ADD_FI:
 830         case INSTR_SUB_I:
 831         case INSTR_SUB_FI:
 832         case INSTR_SUB_IF:
 833         case INSTR_MUL_I:
 834         case INSTR_DIV_I:
 835         case INSTR_BITAND_I:
 836         case INSTR_BITOR_I:
 837         case INSTR_XOR_I:
 838         case INSTR_RSHIFT_I:
 839         case INSTR_LSHIFT_I:
 840             ot = TYPE_INTEGER;
 841             break;
 842 #endif
 843         case INSTR_ADD_V:
 844         case INSTR_SUB_V:
 845         case INSTR_MUL_VF:
 846         case INSTR_MUL_FV:
 847 #if 0
 848         case INSTR_DIV_VF:
 849         case INSTR_MUL_IV:
 850         case INSTR_MUL_VI:
 851 #endif
 852             ot = TYPE_VECTOR;
 853             break;
 854 #if 0
 855         case INSTR_ADD_SF:
 856             ot = TYPE_POINTER;
 857             break;
 858 #endif
 859         default:
 860             /* ranges: */
 861             /* boolean operations result in floats */
 862             if (opcode >= INSTR_EQ_F && opcode <= INSTR_GT)
 863                 ot = TYPE_FLOAT;
 864             else if (opcode >= INSTR_LE && opcode <= INSTR_GT)
 865                 ot = TYPE_FLOAT;
 866 #if 0
 867             else if (opcode >= INSTR_LE_I && opcode <= INSTR_EQ_FI)
 868                 ot = TYPE_FLOAT;
 869 #endif
 870             break;
 871     };
 872     if (ot == TYPE_VOID) {
 873         /* The AST or parser were supposed to check this! */
 874         return NULL;
 875     }
 876
 877     out = ir_value_out(self->owner, label, store_local, ot);
 878     if (!out)
 879         return NULL;
 880
 881     in = ir_instr_new(self, opcode);
 882     if (!in) {
 883         ir_value_delete(out);
 884         return NULL;
 885     }
 886
 887     if (!ir_instr_op(in, 0, out, true) ||
 888         !ir_instr_op(in, 1, left, false) ||
 889         !ir_instr_op(in, 2, right, false) )
 890     {
 891         goto on_error;
 892     }
 893
 894     if (!ir_block_instr_add(self, in))
 895         goto on_error;
 896
 897     return out;
 898 on_error:
 899     ir_value_delete(out);
 900     ir_instr_delete(in);
 901     return NULL;
 902 }
 903
 904 ir_value* ir_block_create_add(ir_block *self,
 905                               const char *label,
 906                               ir_value *left, ir_value *right)
 907 {
 908     int op = 0;
 909     int l = left->vtype;
 910     int r = right->vtype;
 911     if (l == r) {
 912         switch (l) {
 913             default:
 914                 return NULL;
 915             case TYPE_FLOAT:
 916                 op = INSTR_ADD_F;
 917                 break;
 918 #if 0
 919             case TYPE_INTEGER:
 920                 op = INSTR_ADD_I;
 921                 break;
 922 #endif
 923             case TYPE_VECTOR:
 924                 op = INSTR_ADD_V;
 925                 break;
 926         }
 927     } else {
 928 #if 0
 929         if ( (l == TYPE_FLOAT && r == TYPE_INTEGER) )
 930             op = INSTR_ADD_FI;
 931         else if ( (l == TYPE_INTEGER && r == TYPE_FLOAT) )
 932             op = INSTR_ADD_IF;
 933         else
 934 #endif
 935             return NULL;
 936     }
 937     return ir_block_create_binop(self, label, op, left, right);
 938 }
 939
 940 ir_value* ir_block_create_sub(ir_block *self,
 941                               const char *label,
 942                               ir_value *left, ir_value *right)
 943 {
 944     int op = 0;
 945     int l = left->vtype;
 946     int r = right->vtype;
 947     if (l == r) {
 948
 949         switch (l) {
 950             default:
 951                 return NULL;
 952             case TYPE_FLOAT:
 953                 op = INSTR_SUB_F;
 954                 break;
 955 #if 0
 956             case TYPE_INTEGER:
 957                 op = INSTR_SUB_I;
 958                 break;
 959 #endif
 960             case TYPE_VECTOR:
 961                 op = INSTR_SUB_V;
 962                 break;
 963         }
 964     } else {
 965 #if 0
 966         if ( (l == TYPE_FLOAT && r == TYPE_INTEGER) )
 967             op = INSTR_SUB_FI;
 968         else if ( (l == TYPE_INTEGER && r == TYPE_FLOAT) )
 969             op = INSTR_SUB_IF;
 970         else
 971 #endif
 972             return NULL;
 973     }
 974     return ir_block_create_binop(self, label, op, left, right);
 975 }
 976
 977 ir_value* ir_block_create_mul(ir_block *self,
 978                               const char *label,
 979                               ir_value *left, ir_value *right)
 980 {
 981     int op = 0;
 982     int l = left->vtype;
 983     int r = right->vtype;
 984     if (l == r) {
 985
 986         switch (l) {
 987             default:
 988                 return NULL;
 989             case TYPE_FLOAT:
 990                 op = INSTR_MUL_F;
 991                 break;
 992 #if 0
 993             case TYPE_INTEGER:
 994                 op = INSTR_MUL_I;
 995                 break;
 996 #endif
 997             case TYPE_VECTOR:
 998                 op = INSTR_MUL_V;
 999                 break;
1000         }
1001     } else {
1002         if ( (l == TYPE_VECTOR && r == TYPE_FLOAT) )
1003             op = INSTR_MUL_VF;
1004         else if ( (l == TYPE_FLOAT && r == TYPE_VECTOR) )
1005             op = INSTR_MUL_FV;
1006 #if 0
1007         else if ( (l == TYPE_VECTOR && r == TYPE_INTEGER) )
1008             op = INSTR_MUL_VI;
1009         else if ( (l == TYPE_INTEGER && r == TYPE_VECTOR) )
1010             op = INSTR_MUL_IV;
1011         else if ( (l == TYPE_FLOAT && r == TYPE_INTEGER) )
1012             op = INSTR_MUL_FI;
1013         else if ( (l == TYPE_INTEGER && r == TYPE_FLOAT) )
1014             op = INSTR_MUL_IF;
1015 #endif
1016         else
1017             return NULL;
1018     }
1019     return ir_block_create_binop(self, label, op, left, right);
1020 }
1021
1022 ir_value* ir_block_create_div(ir_block *self,
1023                               const char *label,
1024                               ir_value *left, ir_value *right)
1025 {
1026     int op = 0;
1027     int l = left->vtype;
1028     int r = right->vtype;
1029     if (l == r) {
1030
1031         switch (l) {
1032             default:
1033                 return NULL;
1034             case TYPE_FLOAT:
1035                 op = INSTR_DIV_F;
1036                 break;
1037 #if 0
1038             case TYPE_INTEGER:
1039                 op = INSTR_DIV_I;
1040                 break;
1041 #endif
1042         }
1043     } else {
1044 #if 0
1045         if ( (l == TYPE_VECTOR && r == TYPE_FLOAT) )
1046             op = INSTR_DIV_VF;
1047         else if ( (l == TYPE_FLOAT && r == TYPE_INTEGER) )
1048             op = INSTR_DIV_FI;
1049         else if ( (l == TYPE_INTEGER && r == TYPE_FLOAT) )
1050             op = INSTR_DIV_IF;
1051         else
1052 #endif
1053             return NULL;
1054     }
1055     return ir_block_create_binop(self, label, op, left, right);
1056 }
1057
1058 /* PHI resolving breaks the SSA, and must thus be the last
1059  * step before life-range calculation.
1060  */
1061
1062 static bool ir_block_naive_phi(ir_block *self);
1063 bool ir_function_naive_phi(ir_function *self)
1064 {
1065     size_t i;
1066
1067     for (i = 0; i < self->blocks_count; ++i)
1068     {
1069         if (!ir_block_naive_phi(self->blocks[i]))
1070             return false;
1071     }
1072     return true;
1073 }
1074
1075 static bool ir_naive_phi_emit_store(ir_block *block, size_t iid, ir_value *old, ir_value *what)
1076 {
1077     ir_instr *instr;
1078     size_t i;
1079
1080     /* create a store */
1081     if (!ir_block_create_store(block, old, what))
1082         return false;
1083
1084     /* we now move it up */
1085     instr = block->instr[block->instr_count-1];
1086     for (i = block->instr_count; i > iid; --i)
1087         block->instr[i] = block->instr[i-1];
1088     block->instr[i] = instr;
1089
1090     return true;
1091 }
1092
1093 static bool ir_block_naive_phi(ir_block *self)
1094 {
1095     size_t i, p, w;
1096     /* FIXME: optionally, create_phi can add the phis
1097      * to a list so we don't need to loop through blocks
1098      * - anyway: "don't optimize YET"
1099      */
1100     for (i = 0; i < self->instr_count; ++i)
1101     {
1102         ir_instr *instr = self->instr[i];
1103         if (instr->opcode != VINSTR_PHI)
1104             continue;
1105
1106         if (!ir_block_instr_remove(self, i))
1107             return false;
1108         --i; /* NOTE: i+1 below */
1109
1110         for (p = 0; p < instr->phi_count; ++p)
1111         {
1112             ir_value *v = instr->phi[p].value;
1113             for (w = 0; w < v->writes_count; ++w) {
1114                 ir_value *old;
1115
1116                 if (!v->writes[w]->_ops[0])
1117                     continue;
1118
1119                 /* When the write was to a global, we have to emit a mov */
1120                 old = v->writes[w]->_ops[0];
1121
1122                 /* The original instruction now writes to the PHI target local */
1123                 if (v->writes[w]->_ops[0] == v)
1124                     v->writes[w]->_ops[0] = instr->_ops[0];
1125
1126                 if (old->store != store_local)
1127                 {
1128                     /* If it originally wrote to a global we need to store the value
1129                      * there as welli
1130                      */
1131                     if (!ir_naive_phi_emit_store(self, i+1, old, v))
1132                         return false;
1133                     if (i+1 < self->instr_count)
1134                         instr = self->instr[i+1];
1135                     else
1136                         instr = NULL;
1137                     /* In case I forget and access instr later, it'll be NULL
1138                      * when it's a problem, to make sure we crash, rather than accessing
1139                      * invalid data.
1140                      */
1141                 }
1142                 else
1143                 {
1144                     /* If it didn't, we can replace all reads by the phi target now. */
1145                     size_t r;
1146                     for (r = 0; r < old->reads_count; ++r)
1147                     {
1148                         size_t op;
1149                         ir_instr *ri = old->reads[r];
1150                         for (op = 0; op < ri->phi_count; ++op) {
1151                             if (ri->phi[op].value == old)
1152                                 ri->phi[op].value = v;
1153                         }
1154                         for (op = 0; op < 3; ++op) {
1155                             if (ri->_ops[op] == old)
1156                                 ri->_ops[op] = v;
1157                         }
1158                     }
1159                 }
1160             }
1161         }
1162         ir_instr_delete(instr);
1163     }
1164     return true;
1165 }
1166
1167 /***********************************************************************
1168  *IR Temp allocation code
1169  * Propagating value life ranges by walking through the function backwards
1170  * until no more changes are made.
1171  * In theory this should happen once more than once for every nested loop
1172  * level.
1173  * Though this implementation might run an additional time for if nests.
1174  */
1175
1176 typedef struct
1177 {
1178     ir_value* *v;
1179     size_t    v_count;
1180     size_t    v_alloc;
1181 } new_reads_t;
1182 MEM_VEC_FUNCTIONS_ALL(new_reads_t, ir_value*, v)
1183
1184 /* Enumerate instructions used by value's life-ranges
1185  */
1186 static void ir_block_enumerate(ir_block *self, size_t *_eid)
1187 {
1188     size_t i;
1189     size_t eid = *_eid;
1190     for (i = 0; i < self->instr_count; ++i)
1191     {
1192         self->instr[i]->eid = eid++;
1193     }
1194     *_eid = eid;
1195 }
1196
1197 /* Enumerate blocks and instructions.
1198  * The block-enumeration is unordered!
1199  * We do not really use the block enumreation, however
1200  * the instruction enumeration is important for life-ranges.
1201  */
1202 void ir_function_enumerate(ir_function *self)
1203 {
1204     size_t i;
1205     size_t instruction_id = 0;
1206     for (i = 0; i < self->blocks_count; ++i)
1207     {
1208         self->blocks[i]->eid = i;
1209         self->blocks[i]->run_id = 0;
1210         ir_block_enumerate(self->blocks[i], &instruction_id);
1211     }
1212 }
1213
1214 static bool ir_block_life_propagate(ir_block *b, ir_block *prev, bool *changed);
1215 bool ir_function_calculate_liferanges(ir_function *self)
1216 {
1217     size_t i;
1218     bool changed;
1219
1220     do {
1221         self->run_id++;
1222         changed = false;
1223         for (i = 0; i != self->blocks_count; ++i)
1224         {
1225             if (self->blocks[i]->is_return)
1226             {
1227                 if (!ir_block_life_propagate(self->blocks[i], NULL, &changed))
1228                     return false;
1229             }
1230         }
1231     } while (changed);
1232     return true;
1233 }
1234
1235 /* Get information about which operand
1236  * is read from, or written to.
1237  */
1238 static void ir_op_read_write(int op, size_t *read, size_t *write)
1239 {
1240     switch (op)
1241     {
1242     case VINSTR_JUMP:
1243     case INSTR_GOTO:
1244         *write = 0;
1245         *read = 0;
1246         break;
1247     case INSTR_IF:
1248     case INSTR_IFNOT:
1249 #if 0
1250     case INSTR_IF_S:
1251     case INSTR_IFNOT_S:
1252 #endif
1253     case INSTR_RETURN:
1254     case VINSTR_COND:
1255         *write = 0;
1256         *read = 1;
1257         break;
1258     default:
1259         *write = 1;
1260         *read = 6;
1261         break;
1262     };
1263 }
1264
1265 static bool ir_block_living_add_instr(ir_block *self, size_t eid)
1266 {
1267     size_t i;
1268     bool changed = false;
1269     bool tempbool;
1270     for (i = 0; i != self->living_count; ++i)
1271     {
1272         tempbool = ir_value_life_merge(self->living[i], eid);
1273         /* debug
1274         if (tempbool)
1275             fprintf(stderr, "block_living_add_instr() value instruction added %s: %i\n", self->living[i]->_name, (int)eid);
1276         */
1277         changed = changed || tempbool;
1278     }
1279     return changed;
1280 }
1281
1282 static bool ir_block_life_prop_previous(ir_block* self, ir_block *prev, bool *changed)
1283 {
1284     size_t i;
1285     /* values which have been read in a previous iteration are now
1286      * in the "living" array even if the previous block doesn't use them.
1287      * So we have to remove whatever does not exist in the previous block.
1288      * They will be re-added on-read, but the liferange merge won't cause
1289      * a change.
1290      */
1291     for (i = 0; i < self->living_count; ++i)
1292     {
1293         if (!ir_block_living_find(prev, self->living[i], NULL)) {
1294             if (!ir_block_living_remove(self, i))
1295                 return false;
1296             --i;
1297         }
1298     }
1299
1300     /* Whatever the previous block still has in its living set
1301      * must now be added to ours as well.
1302      */
1303     for (i = 0; i < prev->living_count; ++i)
1304     {
1305         if (ir_block_living_find(self, prev->living[i], NULL))
1306             continue;
1307         if (!ir_block_living_add(self, prev->living[i]))
1308             return false;
1309         /*
1310         printf("%s got from prev: %s\n", self->label, prev->living[i]->_name);
1311         */
1312     }
1313     return true;
1314 }
1315
1316 static bool ir_block_life_propagate(ir_block *self, ir_block *prev, bool *changed)
1317 {
1318     ir_instr *instr;
1319     ir_value *value;
1320     bool  tempbool;
1321     size_t i, o, p, rd;
1322     /* bitmasks which operands are read from or written to */
1323     size_t read, write;
1324     new_reads_t new_reads;
1325     char dbg_ind[16] = { '#', '0' };
1326     (void)dbg_ind;
1327
1328     MEM_VECTOR_INIT(&new_reads, v);
1329
1330     if (prev)
1331     {
1332         if (!ir_block_life_prop_previous(self, prev, changed))
1333             return false;
1334     }
1335
1336     i = self->instr_count;
1337     while (i)
1338     { --i;
1339         instr = self->instr[i];
1340
1341         /* PHI operands are always read operands */
1342         for (p = 0; p < instr->phi_count; ++p)
1343         {
1344             value = instr->phi[p].value;
1345             /* used this before new_reads - puts the last read into the life range as well
1346             if (!ir_block_living_find(self, value, NULL))
1347                 ir_block_living_add(self, value);
1348             */
1349             /* fprintf(stderr, "read: %s\n", value->_name); */
1350             if (!new_reads_t_v_find(&new_reads, value, NULL))
1351             {
1352                 if (!new_reads_t_v_add(&new_reads, value))
1353                     goto on_error;
1354             }
1355         }
1356
1357         /* See which operands are read and write operands */
1358         ir_op_read_write(instr->opcode, &read, &write);
1359
1360         /* Go through the 3 main operands */
1361         for (o = 0; o < 3; ++o)
1362         {
1363             if (!instr->_ops[o]) /* no such operand */
1364                 continue;
1365
1366             value = instr->_ops[o];
1367
1368             /* We only care about locals */
1369             if (value->store != store_value &&
1370                 value->store != store_local)
1371                 continue;
1372
1373             /* read operands */
1374             if (read & (1<<o))
1375             {
1376                 /* used this before new_reads - puts the last read into the life range as well
1377                 if (!ir_block_living_find(self, value, NULL))
1378                     ir_block_living_add(self, value);
1379                 */
1380                 /* fprintf(stderr, "read: %s\n", value->_name); */
1381                 if (!new_reads_t_v_find(&new_reads, value, NULL))
1382                 {
1383                     if (!new_reads_t_v_add(&new_reads, value))
1384                         goto on_error;
1385                 }
1386             }
1387
1388             /* write operands */
1389             /* When we write to a local, we consider it "dead" for the
1390              * remaining upper part of the function, since in SSA a value
1391              * can only be written once (== created)
1392              */
1393             if (write & (1<<o))
1394             {
1395                 size_t idx, readidx;
1396                 bool in_living = ir_block_living_find(self, value, &idx);
1397                 bool in_reads = new_reads_t_v_find(&new_reads, value, &readidx);
1398                 if (!in_living && !in_reads)
1399                 {
1400                     /* If the value isn't alive it hasn't been read before... */
1401                     /* TODO: See if the warning can be emitted during parsing or AST processing
1402                      * otherwise have warning printed here.
1403                      * IF printing a warning here: include filecontext_t,
1404                      * and make sure it's only printed once
1405                      * since this function is run multiple times.
1406                      */
1407                     /* For now: debug info: */
1408                     fprintf(stderr, "Value only written %s\n", value->name);
1409                     tempbool = ir_value_life_merge(value, instr->eid);
1410                     *changed = *changed || tempbool;
1411                     /*
1412                     ir_instr_dump(instr, dbg_ind, printf);
1413                     abort();
1414                     */
1415                 } else {
1416                     /* since 'living' won't contain it
1417                      * anymore, merge the value, since
1418                      * (A) doesn't.
1419                      */
1420                     tempbool = ir_value_life_merge(value, instr->eid);
1421                     /*
1422                     if (tempbool)
1423                         fprintf(stderr, "value added id %s %i\n", value->name, (int)instr->eid);
1424                     */
1425                     *changed = *changed || tempbool;
1426                     /* Then remove */
1427                     if (!ir_block_living_remove(self, idx))
1428                         goto on_error;
1429                     if (in_reads)
1430                     {
1431                         if (!new_reads_t_v_remove(&new_reads, readidx))
1432                             goto on_error;
1433                     }
1434                 }
1435             }
1436         }
1437         /* (A) */
1438         tempbool = ir_block_living_add_instr(self, instr->eid);
1439         /*fprintf(stderr, "living added values\n");*/
1440         *changed = *changed || tempbool;
1441
1442         /* new reads: */
1443         for (rd = 0; rd < new_reads.v_count; ++rd)
1444         {
1445             if (!ir_block_living_find(self, new_reads.v[rd], NULL)) {
1446                 if (!ir_block_living_add(self, new_reads.v[rd]))
1447                     goto on_error;
1448             }
1449             if (!i && !self->entries_count) {
1450                 /* fix the top */
1451                 *changed = *changed || ir_value_life_merge(new_reads.v[rd], instr->eid);
1452             }
1453         }
1454         MEM_VECTOR_CLEAR(&new_reads, v);
1455     }
1456
1457     if (self->run_id == self->owner->run_id)
1458         return true;
1459
1460     self->run_id = self->owner->run_id;
1461
1462     for (i = 0; i < self->entries_count; ++i)
1463     {
1464         ir_block *entry = self->entries[i];
1465         ir_block_life_propagate(entry, self, changed);
1466     }
1467
1468     return true;
1469 on_error:
1470     MEM_VECTOR_CLEAR(&new_reads, v);
1471     return false;
1472 }
1473
1474 /***********************************************************************
1475  *IR DEBUG Dump functions...
1476  */
1477
1478 #define IND_BUFSZ 1024
1479
1480 const char *qc_opname(int op)
1481 {
1482     if (op < 0) return "<INVALID>";
1483     if (op < ( sizeof(asm_instr) / sizeof(asm_instr[0]) ))
1484         return asm_instr[op].m;
1485     switch (op) {
1486         case VINSTR_PHI:  return "PHI";
1487         case VINSTR_JUMP: return "JUMP";
1488         case VINSTR_COND: return "COND";
1489         default:          return "<UNK>";
1490     }
1491 }
1492
1493 void ir_builder_dump(ir_builder *b, int (*oprintf)(const char*, ...))
1494 {
1495         size_t i;
1496         char indent[IND_BUFSZ];
1497         indent[0] = '\t';
1498         indent[1] = 0;
1499
1500         oprintf("module %s\n", b->name);
1501         for (i = 0; i < b->globals_count; ++i)
1502         {
1503                 oprintf("global ");
1504                 if (b->globals[i]->isconst)
1505                         oprintf("%s = ", b->globals[i]->name);
1506                 ir_value_dump(b->globals[i], oprintf);
1507                 oprintf("\n");
1508         }
1509         for (i = 0; i < b->functions_count; ++i)
1510                 ir_function_dump(b->functions[i], indent, oprintf);
1511         oprintf("endmodule %s\n", b->name);
1512 }
1513
1514 void ir_function_dump(ir_function *f, char *ind,
1515                       int (*oprintf)(const char*, ...))
1516 {
1517         size_t i;
1518         oprintf("%sfunction %s\n", ind, f->name);
1519         strncat(ind, "\t", IND_BUFSZ);
1520         if (f->locals_count)
1521         {
1522                 oprintf("%s%i locals:\n", ind, (int)f->locals_count);
1523                 for (i = 0; i < f->locals_count; ++i) {
1524                         oprintf("%s\t", ind);
1525                         ir_value_dump(f->locals[i], oprintf);
1526                         oprintf("\n");
1527                 }
1528         }
1529         if (f->blocks_count)
1530         {
1531
1532                 oprintf("%slife passes: %i\n", ind, (int)f->blocks[0]->run_id);
1533                 for (i = 0; i < f->blocks_count; ++i)
1534                         ir_block_dump(f->blocks[i], ind, oprintf);
1535
1536         }
1537         ind[strlen(ind)-1] = 0;
1538         oprintf("%sendfunction %s\n", ind, f->name);
1539 }
1540
1541 void ir_block_dump(ir_block* b, char *ind,
1542                    int (*oprintf)(const char*, ...))
1543 {
1544         size_t i;
1545         oprintf("%s:%s\n", ind, b->label);
1546         strncat(ind, "\t", IND_BUFSZ);
1547
1548         for (i = 0; i < b->instr_count; ++i)
1549                 ir_instr_dump(b->instr[i], ind, oprintf);
1550         ind[strlen(ind)-1] = 0;
1551 }
1552
1553 void dump_phi(ir_instr *in, char *ind,
1554               int (*oprintf)(const char*, ...))
1555 {
1556         size_t i;
1557         oprintf("%s <- phi ", in->_ops[0]->name);
1558         for (i = 0; i < in->phi_count; ++i)
1559         {
1560                 oprintf("([%s] : %s) ", in->phi[i].from->label,
1561                                         in->phi[i].value->name);
1562         }
1563         oprintf("\n");
1564 }
1565
1566 void ir_instr_dump(ir_instr *in, char *ind,
1567                        int (*oprintf)(const char*, ...))
1568 {
1569         size_t i;
1570         const char *comma = NULL;
1571
1572         oprintf("%s (%i) ", ind, (int)in->eid);
1573
1574         if (in->opcode == VINSTR_PHI) {
1575                 dump_phi(in, ind, oprintf);
1576                 return;
1577         }
1578
1579         strncat(ind, "\t", IND_BUFSZ);
1580
1581         if (in->_ops[0] && (in->_ops[1] || in->_ops[2])) {
1582                 ir_value_dump(in->_ops[0], oprintf);
1583                 if (in->_ops[1] || in->_ops[2])
1584                         oprintf(" <- ");
1585         }
1586         oprintf("%s\t", qc_opname(in->opcode));
1587         if (in->_ops[0] && !(in->_ops[1] || in->_ops[2])) {
1588                 ir_value_dump(in->_ops[0], oprintf);
1589                 comma = ",\t";
1590         }
1591         else
1592         {
1593                 for (i = 1; i != 3; ++i) {
1594                         if (in->_ops[i]) {
1595                                 if (comma)
1596                                         oprintf(comma);
1597                                 ir_value_dump(in->_ops[i], oprintf);
1598                                 comma = ",\t";
1599                         }
1600                 }
1601         }
1602         if (in->bops[0]) {
1603                 if (comma)
1604                         oprintf(comma);
1605                 oprintf("[%s]", in->bops[0]->label);
1606                 comma = ",\t";
1607         }
1608         if (in->bops[1])
1609                 oprintf("%s[%s]", comma, in->bops[1]->label);
1610         oprintf("\n");
1611         ind[strlen(ind)-1] = 0;
1612 }
1613
1614 void ir_value_dump(ir_value* v, int (*oprintf)(const char*, ...))
1615 {
1616         if (v->isconst) {
1617                 switch (v->vtype) {
1618                         case TYPE_VOID:
1619                                 oprintf("(void)");
1620                                 break;
1621                         case TYPE_FLOAT:
1622                                 oprintf("%g", v->constval.vfloat);
1623                                 break;
1624                         case TYPE_VECTOR:
1625                                 oprintf("'%g %g %g'",
1626                                         v->constval.vvec.x,
1627                                         v->constval.vvec.y,
1628                                         v->constval.vvec.z);
1629                                 break;
1630                         case TYPE_ENTITY:
1631                                 oprintf("(entity)");
1632                                 break;
1633                         case TYPE_STRING:
1634                                 oprintf("\"%s\"", v->constval.vstring);
1635                                 break;
1636 #if 0
1637                         case TYPE_INTEGER:
1638                                 oprintf("%i", v->constval.vint);
1639                                 break;
1640 #endif
1641                         case TYPE_POINTER:
1642                                 oprintf("&%s",
1643                                         v->constval.vpointer->name);
1644                                 break;
1645                 }
1646         } else {
1647                 oprintf("%s", v->name);
1648         }
1649 }
1650
1651 void ir_value_dump_life(ir_value *self, int (*oprintf)(const char*,...))
1652 {
1653         size_t i;
1654         oprintf("Life of %s:\n", self->name);
1655         for (i = 0; i < self->life_count; ++i)
1656         {
1657                 oprintf(" + [%i, %i]\n", self->life[i].start, self->life[i].end);
1658         }
1659 }