src/glsl/ir_validate.cpp

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * 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
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * \file ir_validate.cpp
  26  *
  27  * Attempts to verify that various invariants of the IR tree are true.
  28  *
  29  * In particular, at the moment it makes sure that no single
  30  * ir_instruction node except for ir_variable appears multiple times
  31  * in the ir tree.  ir_variable does appear multiple times: Once as a
  32  * declaration in an exec_list, and multiple times as the endpoint of
  33  * a dereference chain.
  34  */
  35
  36 #include "ir.h"
  37 #include "ir_hierarchical_visitor.h"
  38 #include "program/hash_table.h"
  39 #include "glsl_types.h"
  40
  41 namespace {
  42
  43 class ir_validate : public ir_hierarchical_visitor {
  44 public:
  45    ir_validate()
  46    {
  47       this->ht = hash_table_ctor(0, hash_table_pointer_hash,
  48                                  hash_table_pointer_compare);
  49
  50       this->current_function = NULL;
  51
  52       this->callback = ir_validate::validate_ir;
  53       this->data = ht;
  54    }
  55
  56    ~ir_validate()
  57    {
  58       hash_table_dtor(this->ht);
  59    }
  60
  61    virtual ir_visitor_status visit(ir_variable *v);
  62    virtual ir_visitor_status visit(ir_dereference_variable *ir);
  63
  64    virtual ir_visitor_status visit_enter(ir_if *ir);
  65
  66    virtual ir_visitor_status visit_enter(ir_function *ir);
  67    virtual ir_visitor_status visit_leave(ir_function *ir);
  68    virtual ir_visitor_status visit_enter(ir_function_signature *ir);
  69
  70    virtual ir_visitor_status visit_leave(ir_expression *ir);
  71    virtual ir_visitor_status visit_leave(ir_swizzle *ir);
  72
  73    virtual ir_visitor_status visit_enter(class ir_dereference_array *);
  74
  75    virtual ir_visitor_status visit_enter(ir_assignment *ir);
  76    virtual ir_visitor_status visit_enter(ir_call *ir);
  77
  78    static void validate_ir(ir_instruction *ir, void *data);
  79
  80    ir_function *current_function;
  81
  82    struct hash_table *ht;
  83 };
  84
  85 } /* anonymous namespace */
  86
  87 ir_visitor_status
  88 ir_validate::visit(ir_dereference_variable *ir)
  89 {
  90    if ((ir->var == NULL) || (ir->var->as_variable() == NULL)) {
  91       printf("ir_dereference_variable @ %p does not specify a variable %p\n",
  92              (void *) ir, (void *) ir->var);
  93       abort();
  94    }
  95
  96    if (hash_table_find(ht, ir->var) == NULL) {
  97       printf("ir_dereference_variable @ %p specifies undeclared variable "
  98              "`%s' @ %p\n",
  99              (void *) ir, ir->var->name, (void *) ir->var);
 100       abort();
 101    }
 102
 103    this->validate_ir(ir, this->data);
 104
 105    return visit_continue;
 106 }
 107
 108 ir_visitor_status
 109 ir_validate::visit_enter(class ir_dereference_array *ir)
 110 {
 111    if (!ir->array->type->is_array() && !ir->array->type->is_matrix()) {
 112       printf("ir_dereference_array @ %p does not specify an array or a "
 113              "matrix\n",
 114              (void *) ir);
 115       ir->print();
 116       printf("\n");
 117       abort();
 118    }
 119
 120    if (!ir->array_index->type->is_scalar()) {
 121       printf("ir_dereference_array @ %p does not have scalar index: %s\n",
 122              (void *) ir, ir->array_index->type->name);
 123       abort();
 124    }
 125
 126    if (!ir->array_index->type->is_integer()) {
 127       printf("ir_dereference_array @ %p does not have integer index: %s\n",
 128              (void *) ir, ir->array_index->type->name);
 129       abort();
 130    }
 131
 132    return visit_continue;
 133 }
 134
 135 ir_visitor_status
 136 ir_validate::visit_enter(ir_if *ir)
 137 {
 138    if (ir->condition->type != glsl_type::bool_type) {
 139       printf("ir_if condition %s type instead of bool.\n",
 140              ir->condition->type->name);
 141       ir->print();
 142       printf("\n");
 143       abort();
 144    }
 145
 146    return visit_continue;
 147 }
 148
 149
 150 ir_visitor_status
 151 ir_validate::visit_enter(ir_function *ir)
 152 {
 153    /* Function definitions cannot be nested.
 154     */
 155    if (this->current_function != NULL) {
 156       printf("Function definition nested inside another function "
 157              "definition:\n");
 158       printf("%s %p inside %s %p\n",
 159              ir->name, (void *) ir,
 160              this->current_function->name, (void *) this->current_function);
 161       abort();
 162    }
 163
 164    /* Store the current function hierarchy being traversed.  This is used
 165     * by the function signature visitor to ensure that the signatures are
 166     * linked with the correct functions.
 167     */
 168    this->current_function = ir;
 169
 170    this->validate_ir(ir, this->data);
 171
 172    /* Verify that all of the things stored in the list of signatures are,
 173     * in fact, function signatures.
 174     */
 175    foreach_list(node, &ir->signatures) {
 176       ir_instruction *sig = (ir_instruction *) node;
 177
 178       if (sig->ir_type != ir_type_function_signature) {
 179          printf("Non-signature in signature list of function `%s'\n",
 180                 ir->name);
 181          abort();
 182       }
 183    }
 184
 185    return visit_continue;
 186 }
 187
 188 ir_visitor_status
 189 ir_validate::visit_leave(ir_function *ir)
 190 {
 191    assert(ralloc_parent(ir->name) == ir);
 192
 193    this->current_function = NULL;
 194    return visit_continue;
 195 }
 196
 197 ir_visitor_status
 198 ir_validate::visit_enter(ir_function_signature *ir)
 199 {
 200    if (this->current_function != ir->function()) {
 201       printf("Function signature nested inside wrong function "
 202              "definition:\n");
 203       printf("%p inside %s %p instead of %s %p\n",
 204              (void *) ir,
 205              this->current_function->name, (void *) this->current_function,
 206              ir->function_name(), (void *) ir->function());
 207       abort();
 208    }
 209
 210    if (ir->return_type == NULL) {
 211       printf("Function signature %p for function %s has NULL return type.\n",
 212              (void *) ir, ir->function_name());
 213       abort();
 214    }
 215
 216    this->validate_ir(ir, this->data);
 217
 218    return visit_continue;
 219 }
 220
 221 ir_visitor_status
 222 ir_validate::visit_leave(ir_expression *ir)
 223 {
 224    switch (ir->operation) {
 225    case ir_unop_bit_not:
 226       assert(ir->operands[0]->type == ir->type);
 227       break;
 228    case ir_unop_logic_not:
 229       assert(ir->type->base_type == GLSL_TYPE_BOOL);
 230       assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
 231       break;
 232
 233    case ir_unop_neg:
 234    case ir_unop_abs:
 235    case ir_unop_sign:
 236    case ir_unop_rcp:
 237    case ir_unop_rsq:
 238    case ir_unop_sqrt:
 239       assert(ir->type == ir->operands[0]->type);
 240       break;
 241
 242    case ir_unop_exp:
 243    case ir_unop_log:
 244    case ir_unop_exp2:
 245    case ir_unop_log2:
 246       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 247       assert(ir->type == ir->operands[0]->type);
 248       break;
 249
 250    case ir_unop_f2i:
 251       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 252       assert(ir->type->base_type == GLSL_TYPE_INT);
 253       break;
 254    case ir_unop_f2u:
 255       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 256       assert(ir->type->base_type == GLSL_TYPE_UINT);
 257       break;
 258    case ir_unop_i2f:
 259       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 260       assert(ir->type->base_type == GLSL_TYPE_FLOAT);
 261       break;
 262    case ir_unop_f2b:
 263       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 264       assert(ir->type->base_type == GLSL_TYPE_BOOL);
 265       break;
 266    case ir_unop_b2f:
 267       assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
 268       assert(ir->type->base_type == GLSL_TYPE_FLOAT);
 269       break;
 270    case ir_unop_i2b:
 271       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 272       assert(ir->type->base_type == GLSL_TYPE_BOOL);
 273       break;
 274    case ir_unop_b2i:
 275       assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
 276       assert(ir->type->base_type == GLSL_TYPE_INT);
 277       break;
 278    case ir_unop_u2f:
 279       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 280       assert(ir->type->base_type == GLSL_TYPE_FLOAT);
 281       break;
 282    case ir_unop_i2u:
 283       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 284       assert(ir->type->base_type == GLSL_TYPE_UINT);
 285       break;
 286    case ir_unop_u2i:
 287       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 288       assert(ir->type->base_type == GLSL_TYPE_INT);
 289       break;
 290    case ir_unop_bitcast_i2f:
 291       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 292       assert(ir->type->base_type == GLSL_TYPE_FLOAT);
 293       break;
 294    case ir_unop_bitcast_f2i:
 295       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 296       assert(ir->type->base_type == GLSL_TYPE_INT);
 297       break;
 298    case ir_unop_bitcast_u2f:
 299       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 300       assert(ir->type->base_type == GLSL_TYPE_FLOAT);
 301       break;
 302    case ir_unop_bitcast_f2u:
 303       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 304       assert(ir->type->base_type == GLSL_TYPE_UINT);
 305       break;
 306
 307    case ir_unop_any:
 308       assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
 309       assert(ir->type == glsl_type::bool_type);
 310       break;
 311
 312    case ir_unop_trunc:
 313    case ir_unop_round_even:
 314    case ir_unop_ceil:
 315    case ir_unop_floor:
 316    case ir_unop_fract:
 317    case ir_unop_sin:
 318    case ir_unop_cos:
 319    case ir_unop_sin_reduced:
 320    case ir_unop_cos_reduced:
 321    case ir_unop_dFdx:
 322    case ir_unop_dFdy:
 323       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 324       assert(ir->operands[0]->type == ir->type);
 325       break;
 326
 327    case ir_unop_pack_snorm_2x16:
 328    case ir_unop_pack_unorm_2x16:
 329    case ir_unop_pack_half_2x16:
 330       assert(ir->type == glsl_type::uint_type);
 331       assert(ir->operands[0]->type == glsl_type::vec2_type);
 332       break;
 333
 334    case ir_unop_pack_snorm_4x8:
 335    case ir_unop_pack_unorm_4x8:
 336       assert(ir->type == glsl_type::uint_type);
 337       assert(ir->operands[0]->type == glsl_type::vec4_type);
 338       break;
 339
 340    case ir_unop_unpack_snorm_2x16:
 341    case ir_unop_unpack_unorm_2x16:
 342    case ir_unop_unpack_half_2x16:
 343       assert(ir->type == glsl_type::vec2_type);
 344       assert(ir->operands[0]->type == glsl_type::uint_type);
 345       break;
 346
 347    case ir_unop_unpack_snorm_4x8:
 348    case ir_unop_unpack_unorm_4x8:
 349       assert(ir->type == glsl_type::vec4_type);
 350       assert(ir->operands[0]->type == glsl_type::uint_type);
 351       break;
 352
 353    case ir_unop_unpack_half_2x16_split_x:
 354    case ir_unop_unpack_half_2x16_split_y:
 355       assert(ir->type == glsl_type::float_type);
 356       assert(ir->operands[0]->type == glsl_type::uint_type);
 357       break;
 358
 359    case ir_unop_bitfield_reverse:
 360       assert(ir->operands[0]->type == ir->type);
 361       assert(ir->type->is_integer());
 362       break;
 363
 364    case ir_unop_bit_count:
 365    case ir_unop_find_msb:
 366    case ir_unop_find_lsb:
 367       assert(ir->operands[0]->type->vector_elements == ir->type->vector_elements);
 368       assert(ir->operands[0]->type->is_integer());
 369       assert(ir->type->base_type == GLSL_TYPE_INT);
 370       break;
 371
 372    case ir_unop_noise:
 373       /* XXX what can we assert here? */
 374       break;
 375
 376    case ir_binop_add:
 377    case ir_binop_sub:
 378    case ir_binop_mul:
 379    case ir_binop_div:
 380    case ir_binop_mod:
 381    case ir_binop_min:
 382    case ir_binop_max:
 383    case ir_binop_pow:
 384       assert(ir->operands[0]->type->base_type ==
 385              ir->operands[1]->type->base_type);
 386
 387       if (ir->operands[0]->type->is_scalar())
 388          assert(ir->operands[1]->type == ir->type);
 389       else if (ir->operands[1]->type->is_scalar())
 390          assert(ir->operands[0]->type == ir->type);
 391       else if (ir->operands[0]->type->is_vector() &&
 392                ir->operands[1]->type->is_vector()) {
 393          assert(ir->operands[0]->type == ir->operands[1]->type);
 394          assert(ir->operands[0]->type == ir->type);
 395       }
 396       break;
 397
 398    case ir_binop_imul_high:
 399       assert(ir->type == ir->operands[0]->type);
 400       assert(ir->type == ir->operands[1]->type);
 401       assert(ir->type->is_integer());
 402       break;
 403
 404    case ir_binop_carry:
 405    case ir_binop_borrow:
 406       assert(ir->type == ir->operands[0]->type);
 407       assert(ir->type == ir->operands[1]->type);
 408       assert(ir->type->base_type == GLSL_TYPE_UINT);
 409       break;
 410
 411    case ir_binop_less:
 412    case ir_binop_greater:
 413    case ir_binop_lequal:
 414    case ir_binop_gequal:
 415    case ir_binop_equal:
 416    case ir_binop_nequal:
 417       /* The semantics of the IR operators differ from the GLSL <, >, <=, >=,
 418        * ==, and != operators.  The IR operators perform a component-wise
 419        * comparison on scalar or vector types and return a boolean scalar or
 420        * vector type of the same size.
 421        */
 422       assert(ir->type->base_type == GLSL_TYPE_BOOL);
 423       assert(ir->operands[0]->type == ir->operands[1]->type);
 424       assert(ir->operands[0]->type->is_vector()
 425              || ir->operands[0]->type->is_scalar());
 426       assert(ir->operands[0]->type->vector_elements
 427              == ir->type->vector_elements);
 428       break;
 429
 430    case ir_binop_all_equal:
 431    case ir_binop_any_nequal:
 432       /* GLSL == and != operate on scalars, vectors, matrices and arrays, and
 433        * return a scalar boolean.  The IR matches that.
 434        */
 435       assert(ir->type == glsl_type::bool_type);
 436       assert(ir->operands[0]->type == ir->operands[1]->type);
 437       break;
 438
 439    case ir_binop_lshift:
 440    case ir_binop_rshift:
 441       assert(ir->operands[0]->type->is_integer() &&
 442              ir->operands[1]->type->is_integer());
 443       if (ir->operands[0]->type->is_scalar()) {
 444           assert(ir->operands[1]->type->is_scalar());
 445       }
 446       if (ir->operands[0]->type->is_vector() &&
 447           ir->operands[1]->type->is_vector()) {
 448           assert(ir->operands[0]->type->components() ==
 449                  ir->operands[1]->type->components());
 450       }
 451       assert(ir->type == ir->operands[0]->type);
 452       break;
 453
 454    case ir_binop_bit_and:
 455    case ir_binop_bit_xor:
 456    case ir_binop_bit_or:
 457        assert(ir->operands[0]->type->base_type ==
 458               ir->operands[1]->type->base_type);
 459        assert(ir->type->is_integer());
 460        if (ir->operands[0]->type->is_vector() &&
 461            ir->operands[1]->type->is_vector()) {
 462            assert(ir->operands[0]->type->vector_elements ==
 463                   ir->operands[1]->type->vector_elements);
 464        }
 465        break;
 466
 467    case ir_binop_logic_and:
 468    case ir_binop_logic_xor:
 469    case ir_binop_logic_or:
 470       assert(ir->type == glsl_type::bool_type);
 471       assert(ir->operands[0]->type == glsl_type::bool_type);
 472       assert(ir->operands[1]->type == glsl_type::bool_type);
 473       break;
 474
 475    case ir_binop_dot:
 476       assert(ir->type == glsl_type::float_type);
 477       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 478       assert(ir->operands[0]->type->is_vector());
 479       assert(ir->operands[0]->type == ir->operands[1]->type);
 480       break;
 481
 482    case ir_binop_pack_half_2x16_split:
 483       assert(ir->type == glsl_type::uint_type);
 484       assert(ir->operands[0]->type == glsl_type::float_type);
 485       assert(ir->operands[1]->type == glsl_type::float_type);
 486       break;
 487
 488    case ir_binop_bfm:
 489       assert(ir->type->is_integer());
 490       assert(ir->operands[0]->type->is_integer());
 491       assert(ir->operands[1]->type->is_integer());
 492       break;
 493
 494    case ir_binop_ubo_load:
 495       assert(ir->operands[0]->as_constant());
 496       assert(ir->operands[0]->type == glsl_type::uint_type);
 497
 498       assert(ir->operands[1]->type == glsl_type::uint_type);
 499       break;
 500
 501    case ir_binop_ldexp:
 502       assert(ir->operands[0]->type == ir->type);
 503       assert(ir->operands[0]->type->is_float());
 504       assert(ir->operands[1]->type->base_type == GLSL_TYPE_INT);
 505       assert(ir->operands[0]->type->components() ==
 506              ir->operands[1]->type->components());
 507       break;
 508
 509    case ir_binop_vector_extract:
 510       assert(ir->operands[0]->type->is_vector());
 511       assert(ir->operands[1]->type->is_scalar()
 512              && ir->operands[1]->type->is_integer());
 513       break;
 514
 515    case ir_triop_fma:
 516       assert(ir->type->base_type == GLSL_TYPE_FLOAT);
 517       assert(ir->type == ir->operands[0]->type);
 518       assert(ir->type == ir->operands[1]->type);
 519       assert(ir->type == ir->operands[2]->type);
 520       break;
 521
 522    case ir_triop_lrp:
 523       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 524       assert(ir->operands[0]->type == ir->operands[1]->type);
 525       assert(ir->operands[2]->type == ir->operands[0]->type || ir->operands[2]->type == glsl_type::float_type);
 526       break;
 527
 528    case ir_triop_csel:
 529       assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
 530       assert(ir->type->vector_elements == ir->operands[0]->type->vector_elements);
 531       assert(ir->type == ir->operands[1]->type);
 532       assert(ir->type == ir->operands[2]->type);
 533       break;
 534
 535    case ir_triop_bfi:
 536       assert(ir->operands[0]->type->is_integer());
 537       assert(ir->operands[1]->type == ir->operands[2]->type);
 538       assert(ir->operands[1]->type == ir->type);
 539       break;
 540
 541    case ir_triop_bitfield_extract:
 542       assert(ir->operands[0]->type == ir->type);
 543       assert(ir->operands[1]->type == glsl_type::int_type);
 544       assert(ir->operands[2]->type == glsl_type::int_type);
 545       break;
 546
 547    case ir_triop_vector_insert:
 548       assert(ir->operands[0]->type->is_vector());
 549       assert(ir->operands[1]->type->is_scalar());
 550       assert(ir->operands[0]->type->base_type == ir->operands[1]->type->base_type);
 551       assert(ir->operands[2]->type->is_scalar()
 552              && ir->operands[2]->type->is_integer());
 553       assert(ir->type == ir->operands[0]->type);
 554       break;
 555
 556    case ir_quadop_bitfield_insert:
 557       assert(ir->operands[0]->type == ir->type);
 558       assert(ir->operands[1]->type == ir->type);
 559       assert(ir->operands[2]->type == glsl_type::int_type);
 560       assert(ir->operands[3]->type == glsl_type::int_type);
 561       break;
 562
 563    case ir_quadop_vector:
 564       /* The vector operator collects some number of scalars and generates a
 565        * vector from them.
 566        *
 567        *  - All of the operands must be scalar.
 568        *  - Number of operands must matche the size of the resulting vector.
 569        *  - Base type of the operands must match the base type of the result.
 570        */
 571       assert(ir->type->is_vector());
 572       switch (ir->type->vector_elements) {
 573       case 2:
 574          assert(ir->operands[0]->type->is_scalar());
 575          assert(ir->operands[0]->type->base_type == ir->type->base_type);
 576          assert(ir->operands[1]->type->is_scalar());
 577          assert(ir->operands[1]->type->base_type == ir->type->base_type);
 578          assert(ir->operands[2] == NULL);
 579          assert(ir->operands[3] == NULL);
 580          break;
 581       case 3:
 582          assert(ir->operands[0]->type->is_scalar());
 583          assert(ir->operands[0]->type->base_type == ir->type->base_type);
 584          assert(ir->operands[1]->type->is_scalar());
 585          assert(ir->operands[1]->type->base_type == ir->type->base_type);
 586          assert(ir->operands[2]->type->is_scalar());
 587          assert(ir->operands[2]->type->base_type == ir->type->base_type);
 588          assert(ir->operands[3] == NULL);
 589          break;
 590       case 4:
 591          assert(ir->operands[0]->type->is_scalar());
 592          assert(ir->operands[0]->type->base_type == ir->type->base_type);
 593          assert(ir->operands[1]->type->is_scalar());
 594          assert(ir->operands[1]->type->base_type == ir->type->base_type);
 595          assert(ir->operands[2]->type->is_scalar());
 596          assert(ir->operands[2]->type->base_type == ir->type->base_type);
 597          assert(ir->operands[3]->type->is_scalar());
 598          assert(ir->operands[3]->type->base_type == ir->type->base_type);
 599          break;
 600       default:
 601          /* The is_vector assertion above should prevent execution from ever
 602           * getting here.
 603           */
 604          assert(!"Should not get here.");
 605          break;
 606       }
 607    }
 608
 609    return visit_continue;
 610 }
 611
 612 ir_visitor_status
 613 ir_validate::visit_leave(ir_swizzle *ir)
 614 {
 615    unsigned int chans[4] = {ir->mask.x, ir->mask.y, ir->mask.z, ir->mask.w};
 616
 617    for (unsigned int i = 0; i < ir->type->vector_elements; i++) {
 618       if (chans[i] >= ir->val->type->vector_elements) {
 619          printf("ir_swizzle @ %p specifies a channel not present "
 620                 "in the value.\n", (void *) ir);
 621          ir->print();
 622          abort();
 623       }
 624    }
 625
 626    return visit_continue;
 627 }
 628
 629 ir_visitor_status
 630 ir_validate::visit(ir_variable *ir)
 631 {
 632    /* An ir_variable is the one thing that can (and will) appear multiple times
 633     * in an IR tree.  It is added to the hashtable so that it can be used
 634     * in the ir_dereference_variable handler to ensure that a variable is
 635     * declared before it is dereferenced.
 636     */
 637    if (ir->name)
 638       assert(ralloc_parent(ir->name) == ir);
 639
 640    hash_table_insert(ht, ir, ir);
 641
 642
 643    /* If a variable is an array, verify that the maximum array index is in
 644     * bounds.  There was once an error in AST-to-HIR conversion that set this
 645     * to be out of bounds.
 646     */
 647    if (ir->type->array_size() > 0) {
 648       if (ir->data.max_array_access >= ir->type->length) {
 649          printf("ir_variable has maximum access out of bounds (%d vs %d)\n",
 650                 ir->data.max_array_access, ir->type->length - 1);
 651          ir->print();
 652          abort();
 653       }
 654    }
 655
 656    /* If a variable is an interface block (or an array of interface blocks),
 657     * verify that the maximum array index for each interface member is in
 658     * bounds.
 659     */
 660    if (ir->is_interface_instance()) {
 661       const glsl_struct_field *fields =
 662          ir->get_interface_type()->fields.structure;
 663       for (unsigned i = 0; i < ir->get_interface_type()->length; i++) {
 664          if (fields[i].type->array_size() > 0) {
 665             if (ir->max_ifc_array_access[i] >= fields[i].type->length) {
 666                printf("ir_variable has maximum access out of bounds for "
 667                       "field %s (%d vs %d)\n", fields[i].name,
 668                       ir->max_ifc_array_access[i], fields[i].type->length);
 669                ir->print();
 670                abort();
 671             }
 672          }
 673       }
 674    }
 675
 676    if (ir->constant_initializer != NULL && !ir->data.has_initializer) {
 677       printf("ir_variable didn't have an initializer, but has a constant "
 678              "initializer value.\n");
 679       ir->print();
 680       abort();
 681    }
 682
 683    return visit_continue;
 684 }
 685
 686 ir_visitor_status
 687 ir_validate::visit_enter(ir_assignment *ir)
 688 {
 689    const ir_dereference *const lhs = ir->lhs;
 690    if (lhs->type->is_scalar() || lhs->type->is_vector()) {
 691       if (ir->write_mask == 0) {
 692          printf("Assignment LHS is %s, but write mask is 0:\n",
 693                 lhs->type->is_scalar() ? "scalar" : "vector");
 694          ir->print();
 695          abort();
 696       }
 697
 698       int lhs_components = 0;
 699       for (int i = 0; i < 4; i++) {
 700          if (ir->write_mask & (1 << i))
 701             lhs_components++;
 702       }
 703
 704       if (lhs_components != ir->rhs->type->vector_elements) {
 705          printf("Assignment count of LHS write mask channels enabled not\n"
 706                 "matching RHS vector size (%d LHS, %d RHS).\n",
 707                 lhs_components, ir->rhs->type->vector_elements);
 708          ir->print();
 709          abort();
 710       }
 711    }
 712
 713    this->validate_ir(ir, this->data);
 714
 715    return visit_continue;
 716 }
 717
 718 ir_visitor_status
 719 ir_validate::visit_enter(ir_call *ir)
 720 {
 721    ir_function_signature *const callee = ir->callee;
 722
 723    if (callee->ir_type != ir_type_function_signature) {
 724       printf("IR called by ir_call is not ir_function_signature!\n");
 725       abort();
 726    }
 727
 728    if (ir->return_deref) {
 729       if (ir->return_deref->type != callee->return_type) {
 730          printf("callee type %s does not match return storage type %s\n",
 731                 callee->return_type->name, ir->return_deref->type->name);
 732          abort();
 733       }
 734    } else if (callee->return_type != glsl_type::void_type) {
 735       printf("ir_call has non-void callee but no return storage\n");
 736       abort();
 737    }
 738
 739    const exec_node *formal_param_node = callee->parameters.head;
 740    const exec_node *actual_param_node = ir->actual_parameters.head;
 741    while (true) {
 742       if (formal_param_node->is_tail_sentinel()
 743           != actual_param_node->is_tail_sentinel()) {
 744          printf("ir_call has the wrong number of parameters:\n");
 745          goto dump_ir;
 746       }
 747       if (formal_param_node->is_tail_sentinel()) {
 748          break;
 749       }
 750       const ir_variable *formal_param
 751          = (const ir_variable *) formal_param_node;
 752       const ir_rvalue *actual_param
 753          = (const ir_rvalue *) actual_param_node;
 754       if (formal_param->type != actual_param->type) {
 755          printf("ir_call parameter type mismatch:\n");
 756          goto dump_ir;
 757       }
 758       if (formal_param->data.mode == ir_var_function_out
 759           || formal_param->data.mode == ir_var_function_inout) {
 760          if (!actual_param->is_lvalue()) {
 761             printf("ir_call out/inout parameters must be lvalues:\n");
 762             goto dump_ir;
 763          }
 764       }
 765       formal_param_node = formal_param_node->next;
 766       actual_param_node = actual_param_node->next;
 767    }
 768
 769    return visit_continue;
 770
 771 dump_ir:
 772    ir->print();
 773    printf("callee:\n");
 774    callee->print();
 775    abort();
 776    return visit_stop;
 777 }
 778
 779 void
 780 ir_validate::validate_ir(ir_instruction *ir, void *data)
 781 {
 782    struct hash_table *ht = (struct hash_table *) data;
 783
 784    if (hash_table_find(ht, ir)) {
 785       printf("Instruction node present twice in ir tree:\n");
 786       ir->print();
 787       printf("\n");
 788       abort();
 789    }
 790    hash_table_insert(ht, ir, ir);
 791 }
 792
 793 void
 794 check_node_type(ir_instruction *ir, void *data)
 795 {
 796    (void) data;
 797
 798    if (ir->ir_type >= ir_type_max) {
 799       printf("Instruction node with unset type\n");
 800       ir->print(); printf("\n");
 801    }
 802    ir_rvalue *value = ir->as_rvalue();
 803    if (value != NULL)
 804       assert(value->type != glsl_type::error_type);
 805 }
 806
 807 void
 808 validate_ir_tree(exec_list *instructions)
 809 {
 810    /* We shouldn't have any reason to validate IR in a release build,
 811     * and it's half composed of assert()s anyway which wouldn't do
 812     * anything.
 813     */
 814 #ifdef DEBUG
 815    ir_validate v;
 816
 817    v.run(instructions);
 818
 819    foreach_list(n, instructions) {
 820       ir_instruction *ir = (ir_instruction *) n;
 821
 822       visit_tree(ir, check_node_type, NULL);
 823    }
 824 #endif
 825 }