src/compiler/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 "util/hash_table.h"
  39 #include "util/macros.h"
  40 #include "util/set.h"
  41 #include "compiler/glsl_types.h"
  42
  43 namespace {
  44
  45 class ir_validate : public ir_hierarchical_visitor {
  46 public:
  47    ir_validate()
  48    {
  49       this->ir_set = _mesa_pointer_set_create(NULL);
  50
  51       this->current_function = NULL;
  52
  53       this->callback_enter = ir_validate::validate_ir;
  54       this->data_enter = ir_set;
  55    }
  56
  57    ~ir_validate()
  58    {
  59       _mesa_set_destroy(this->ir_set, NULL);
  60    }
  61
  62    virtual ir_visitor_status visit(ir_variable *v);
  63    virtual ir_visitor_status visit(ir_dereference_variable *ir);
  64
  65    virtual ir_visitor_status visit_enter(ir_discard *ir);
  66    virtual ir_visitor_status visit_enter(ir_if *ir);
  67
  68    virtual ir_visitor_status visit_enter(ir_function *ir);
  69    virtual ir_visitor_status visit_leave(ir_function *ir);
  70    virtual ir_visitor_status visit_enter(ir_function_signature *ir);
  71
  72    virtual ir_visitor_status visit_leave(ir_expression *ir);
  73    virtual ir_visitor_status visit_leave(ir_swizzle *ir);
  74
  75    virtual ir_visitor_status visit_enter(class ir_dereference_array *);
  76
  77    virtual ir_visitor_status visit_enter(ir_assignment *ir);
  78    virtual ir_visitor_status visit_enter(ir_call *ir);
  79
  80    static void validate_ir(ir_instruction *ir, void *data);
  81
  82    ir_function *current_function;
  83
  84    struct set *ir_set;
  85 };
  86
  87 } /* anonymous namespace */
  88
  89 ir_visitor_status
  90 ir_validate::visit(ir_dereference_variable *ir)
  91 {
  92    if ((ir->var == NULL) || (ir->var->as_variable() == NULL)) {
  93       printf("ir_dereference_variable @ %p does not specify a variable %p\n",
  94              (void *) ir, (void *) ir->var);
  95       abort();
  96    }
  97
  98    if (_mesa_set_search(ir_set, ir->var) == NULL) {
  99       printf("ir_dereference_variable @ %p specifies undeclared variable "
 100              "`%s' @ %p\n",
 101              (void *) ir, ir->var->name, (void *) ir->var);
 102       abort();
 103    }
 104
 105    this->validate_ir(ir, this->data_enter);
 106
 107    return visit_continue;
 108 }
 109
 110 ir_visitor_status
 111 ir_validate::visit_enter(class ir_dereference_array *ir)
 112 {
 113    if (!ir->array->type->is_array() && !ir->array->type->is_matrix() &&
 114       !ir->array->type->is_vector()) {
 115       printf("ir_dereference_array @ %p does not specify an array, a vector "
 116              "or a matrix\n",
 117              (void *) ir);
 118       ir->print();
 119       printf("\n");
 120       abort();
 121    }
 122
 123    if (!ir->array_index->type->is_scalar()) {
 124       printf("ir_dereference_array @ %p does not have scalar index: %s\n",
 125              (void *) ir, ir->array_index->type->name);
 126       abort();
 127    }
 128
 129    if (!ir->array_index->type->is_integer_32()) {
 130       printf("ir_dereference_array @ %p does not have integer index: %s\n",
 131              (void *) ir, ir->array_index->type->name);
 132       abort();
 133    }
 134
 135    return visit_continue;
 136 }
 137
 138 ir_visitor_status
 139 ir_validate::visit_enter(ir_discard *ir)
 140 {
 141    if (ir->condition && ir->condition->type != glsl_type::bool_type) {
 142       printf("ir_discard condition %s type instead of bool.\n",
 143              ir->condition->type->name);
 144       ir->print();
 145       printf("\n");
 146       abort();
 147    }
 148
 149    return visit_continue;
 150 }
 151
 152 ir_visitor_status
 153 ir_validate::visit_enter(ir_if *ir)
 154 {
 155    if (ir->condition->type != glsl_type::bool_type) {
 156       printf("ir_if condition %s type instead of bool.\n",
 157              ir->condition->type->name);
 158       ir->print();
 159       printf("\n");
 160       abort();
 161    }
 162
 163    return visit_continue;
 164 }
 165
 166
 167 ir_visitor_status
 168 ir_validate::visit_enter(ir_function *ir)
 169 {
 170    /* Function definitions cannot be nested.
 171     */
 172    if (this->current_function != NULL) {
 173       printf("Function definition nested inside another function "
 174              "definition:\n");
 175       printf("%s %p inside %s %p\n",
 176              ir->name, (void *) ir,
 177              this->current_function->name, (void *) this->current_function);
 178       abort();
 179    }
 180
 181    /* Store the current function hierarchy being traversed.  This is used
 182     * by the function signature visitor to ensure that the signatures are
 183     * linked with the correct functions.
 184     */
 185    this->current_function = ir;
 186
 187    this->validate_ir(ir, this->data_enter);
 188
 189    /* Verify that all of the things stored in the list of signatures are,
 190     * in fact, function signatures.
 191     */
 192    foreach_in_list(ir_instruction, sig, &ir->signatures) {
 193       if (sig->ir_type != ir_type_function_signature) {
 194          printf("Non-signature in signature list of function `%s'\n",
 195                 ir->name);
 196          abort();
 197       }
 198    }
 199
 200    return visit_continue;
 201 }
 202
 203 ir_visitor_status
 204 ir_validate::visit_leave(ir_function *ir)
 205 {
 206    assert(ralloc_parent(ir->name) == ir);
 207
 208    this->current_function = NULL;
 209    return visit_continue;
 210 }
 211
 212 ir_visitor_status
 213 ir_validate::visit_enter(ir_function_signature *ir)
 214 {
 215    if (this->current_function != ir->function()) {
 216       printf("Function signature nested inside wrong function "
 217              "definition:\n");
 218       printf("%p inside %s %p instead of %s %p\n",
 219              (void *) ir,
 220              this->current_function->name, (void *) this->current_function,
 221              ir->function_name(), (void *) ir->function());
 222       abort();
 223    }
 224
 225    if (ir->return_type == NULL) {
 226       printf("Function signature %p for function %s has NULL return type.\n",
 227              (void *) ir, ir->function_name());
 228       abort();
 229    }
 230
 231    this->validate_ir(ir, this->data_enter);
 232
 233    return visit_continue;
 234 }
 235
 236 ir_visitor_status
 237 ir_validate::visit_leave(ir_expression *ir)
 238 {
 239    for (unsigned i = ir->num_operands; i < 4; i++) {
 240       assert(ir->operands[i] == NULL);
 241    }
 242
 243    for (unsigned i = 0; i < ir->num_operands; i++) {
 244       assert(ir->operands[i] != NULL);
 245    }
 246
 247    switch (ir->operation) {
 248    case ir_unop_bit_not:
 249       assert(ir->operands[0]->type == ir->type);
 250       break;
 251    case ir_unop_logic_not:
 252       assert(ir->type->is_boolean());
 253       assert(ir->operands[0]->type->is_boolean());
 254       break;
 255
 256    case ir_unop_neg:
 257       assert(ir->type == ir->operands[0]->type);
 258       break;
 259
 260    case ir_unop_abs:
 261    case ir_unop_sign:
 262       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT ||
 263              ir->operands[0]->type->is_float() ||
 264              ir->operands[0]->type->is_double() ||
 265              ir->operands[0]->type->base_type == GLSL_TYPE_INT64);
 266       assert(ir->type == ir->operands[0]->type);
 267       break;
 268
 269    case ir_unop_rcp:
 270    case ir_unop_rsq:
 271    case ir_unop_sqrt:
 272       assert(ir->type->is_float() ||
 273              ir->type->is_double());
 274       assert(ir->type == ir->operands[0]->type);
 275       break;
 276
 277    case ir_unop_exp:
 278    case ir_unop_log:
 279    case ir_unop_exp2:
 280    case ir_unop_log2:
 281    case ir_unop_saturate:
 282       assert(ir->operands[0]->type->is_float());
 283       assert(ir->type == ir->operands[0]->type);
 284       break;
 285
 286    case ir_unop_f2i:
 287       assert(ir->operands[0]->type->is_float());
 288       assert(ir->type->base_type == GLSL_TYPE_INT);
 289       break;
 290    case ir_unop_f2u:
 291       assert(ir->operands[0]->type->is_float());
 292       assert(ir->type->base_type == GLSL_TYPE_UINT);
 293       break;
 294    case ir_unop_i2f:
 295       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 296       assert(ir->type->is_float());
 297       break;
 298    case ir_unop_f2b:
 299       assert(ir->operands[0]->type->is_float());
 300       assert(ir->type->is_boolean());
 301       break;
 302    case ir_unop_f162b:
 303       assert(ir->operands[0]->type->base_type ==
 304              GLSL_TYPE_FLOAT16);
 305       assert(ir->type->is_boolean());
 306       break;
 307    case ir_unop_b2f:
 308       assert(ir->operands[0]->type->is_boolean());
 309       assert(ir->type->is_float());
 310       break;
 311    case ir_unop_b2f16:
 312       assert(ir->operands[0]->type->is_boolean());
 313       assert(ir->type->base_type == GLSL_TYPE_FLOAT16);
 314       break;
 315    case ir_unop_i2b:
 316       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 317       assert(ir->type->is_boolean());
 318       break;
 319    case ir_unop_b2i:
 320       assert(ir->operands[0]->type->is_boolean());
 321       assert(ir->type->base_type == GLSL_TYPE_INT);
 322       break;
 323    case ir_unop_u2f:
 324       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 325       assert(ir->type->is_float());
 326       break;
 327    case ir_unop_i2u:
 328       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 329       assert(ir->type->base_type == GLSL_TYPE_UINT);
 330       break;
 331    case ir_unop_u2i:
 332       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 333       assert(ir->type->base_type == GLSL_TYPE_INT);
 334       break;
 335    case ir_unop_bitcast_i2f:
 336       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 337       assert(ir->type->is_float());
 338       break;
 339    case ir_unop_bitcast_f2i:
 340       assert(ir->operands[0]->type->is_float());
 341       assert(ir->type->base_type == GLSL_TYPE_INT);
 342       break;
 343    case ir_unop_bitcast_u2f:
 344       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 345       assert(ir->type->is_float());
 346       break;
 347    case ir_unop_bitcast_f2u:
 348       assert(ir->operands[0]->type->is_float());
 349       assert(ir->type->base_type == GLSL_TYPE_UINT);
 350       break;
 351
 352    case ir_unop_bitcast_u642d:
 353       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT64);
 354       assert(ir->type->is_double());
 355       break;
 356    case ir_unop_bitcast_i642d:
 357       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT64);
 358       assert(ir->type->is_double());
 359       break;
 360    case ir_unop_bitcast_d2u64:
 361       assert(ir->operands[0]->type->is_double());
 362       assert(ir->type->base_type == GLSL_TYPE_UINT64);
 363       break;
 364    case ir_unop_bitcast_d2i64:
 365       assert(ir->operands[0]->type->is_double());
 366       assert(ir->type->base_type == GLSL_TYPE_INT64);
 367       break;
 368    case ir_unop_i642i:
 369       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT64);
 370       assert(ir->type->base_type == GLSL_TYPE_INT);
 371       break;
 372    case ir_unop_u642i:
 373       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT64);
 374       assert(ir->type->base_type == GLSL_TYPE_INT);
 375       break;
 376    case ir_unop_i642u:
 377       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT64);
 378       assert(ir->type->base_type == GLSL_TYPE_UINT);
 379       break;
 380    case ir_unop_u642u:
 381       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT64);
 382       assert(ir->type->base_type == GLSL_TYPE_UINT);
 383       break;
 384    case ir_unop_i642b:
 385       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT64);
 386       assert(ir->type->is_boolean());
 387       break;
 388    case ir_unop_i642f:
 389       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT64);
 390       assert(ir->type->is_float());
 391       break;
 392    case ir_unop_u642f:
 393       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT64);
 394       assert(ir->type->is_float());
 395       break;
 396    case ir_unop_i642d:
 397       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT64);
 398       assert(ir->type->is_double());
 399       break;
 400    case ir_unop_u642d:
 401       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT64);
 402       assert(ir->type->is_double());
 403       break;
 404    case ir_unop_i2i64:
 405       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 406       assert(ir->type->base_type == GLSL_TYPE_INT64);
 407       break;
 408    case ir_unop_u2i64:
 409       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 410       assert(ir->type->base_type == GLSL_TYPE_INT64);
 411       break;
 412    case ir_unop_b2i64:
 413       assert(ir->operands[0]->type->is_boolean());
 414       assert(ir->type->base_type == GLSL_TYPE_INT64);
 415       break;
 416    case ir_unop_f2i64:
 417       assert(ir->operands[0]->type->is_float());
 418       assert(ir->type->base_type == GLSL_TYPE_INT64);
 419       break;
 420    case ir_unop_d2i64:
 421       assert(ir->operands[0]->type->is_double());
 422       assert(ir->type->base_type == GLSL_TYPE_INT64);
 423       break;
 424    case ir_unop_i2u64:
 425       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 426       assert(ir->type->base_type == GLSL_TYPE_UINT64);
 427       break;
 428    case ir_unop_u2u64:
 429       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 430       assert(ir->type->base_type == GLSL_TYPE_UINT64);
 431       break;
 432    case ir_unop_f2u64:
 433       assert(ir->operands[0]->type->is_float());
 434       assert(ir->type->base_type == GLSL_TYPE_UINT64);
 435       break;
 436    case ir_unop_d2u64:
 437       assert(ir->operands[0]->type->is_double());
 438       assert(ir->type->base_type == GLSL_TYPE_UINT64);
 439       break;
 440    case ir_unop_u642i64:
 441       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT64);
 442       assert(ir->type->base_type == GLSL_TYPE_INT64);
 443       break;
 444    case ir_unop_i642u64:
 445       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT64);
 446       assert(ir->type->base_type == GLSL_TYPE_UINT64);
 447       break;
 448    case ir_unop_trunc:
 449    case ir_unop_round_even:
 450    case ir_unop_ceil:
 451    case ir_unop_floor:
 452    case ir_unop_fract:
 453       assert(ir->operands[0]->type->is_float() ||
 454              ir->operands[0]->type->is_double());
 455       assert(ir->operands[0]->type == ir->type);
 456       break;
 457    case ir_unop_sin:
 458    case ir_unop_cos:
 459    case ir_unop_dFdx:
 460    case ir_unop_dFdx_coarse:
 461    case ir_unop_dFdx_fine:
 462    case ir_unop_dFdy:
 463    case ir_unop_dFdy_coarse:
 464    case ir_unop_dFdy_fine:
 465       assert(ir->operands[0]->type->is_float());
 466       assert(ir->operands[0]->type == ir->type);
 467       break;
 468
 469    case ir_unop_pack_snorm_2x16:
 470    case ir_unop_pack_unorm_2x16:
 471    case ir_unop_pack_half_2x16:
 472       assert(ir->type == glsl_type::uint_type);
 473       assert(ir->operands[0]->type == glsl_type::vec2_type);
 474       break;
 475
 476    case ir_unop_pack_snorm_4x8:
 477    case ir_unop_pack_unorm_4x8:
 478       assert(ir->type == glsl_type::uint_type);
 479       assert(ir->operands[0]->type == glsl_type::vec4_type);
 480       break;
 481
 482    case ir_unop_pack_double_2x32:
 483       assert(ir->type == glsl_type::double_type);
 484       assert(ir->operands[0]->type == glsl_type::uvec2_type);
 485       break;
 486
 487    case ir_unop_pack_int_2x32:
 488       assert(ir->type == glsl_type::int64_t_type);
 489       assert(ir->operands[0]->type == glsl_type::ivec2_type);
 490       break;
 491
 492    case ir_unop_pack_uint_2x32:
 493       assert(ir->type == glsl_type::uint64_t_type);
 494       assert(ir->operands[0]->type == glsl_type::uvec2_type);
 495       break;
 496
 497    case ir_unop_pack_sampler_2x32:
 498       assert(ir->type->is_sampler());
 499       assert(ir->operands[0]->type == glsl_type::uvec2_type);
 500       break;
 501
 502    case ir_unop_pack_image_2x32:
 503       assert(ir->type->is_image());
 504       assert(ir->operands[0]->type == glsl_type::uvec2_type);
 505       break;
 506
 507    case ir_unop_unpack_snorm_2x16:
 508    case ir_unop_unpack_unorm_2x16:
 509    case ir_unop_unpack_half_2x16:
 510       assert(ir->type == glsl_type::vec2_type);
 511       assert(ir->operands[0]->type == glsl_type::uint_type);
 512       break;
 513
 514    case ir_unop_unpack_snorm_4x8:
 515    case ir_unop_unpack_unorm_4x8:
 516       assert(ir->type == glsl_type::vec4_type);
 517       assert(ir->operands[0]->type == glsl_type::uint_type);
 518       break;
 519
 520    case ir_unop_unpack_double_2x32:
 521       assert(ir->type == glsl_type::uvec2_type);
 522       assert(ir->operands[0]->type == glsl_type::double_type);
 523       break;
 524
 525    case ir_unop_unpack_int_2x32:
 526       assert(ir->type == glsl_type::ivec2_type);
 527       assert(ir->operands[0]->type == glsl_type::int64_t_type);
 528       break;
 529
 530    case ir_unop_unpack_uint_2x32:
 531       assert(ir->type == glsl_type::uvec2_type);
 532       assert(ir->operands[0]->type == glsl_type::uint64_t_type);
 533       break;
 534
 535    case ir_unop_unpack_sampler_2x32:
 536       assert(ir->type == glsl_type::uvec2_type);
 537       assert(ir->operands[0]->type->is_sampler());
 538       break;
 539
 540    case ir_unop_unpack_image_2x32:
 541       assert(ir->type == glsl_type::uvec2_type);
 542       assert(ir->operands[0]->type->is_image());
 543       break;
 544
 545    case ir_unop_bitfield_reverse:
 546       assert(ir->operands[0]->type == ir->type);
 547       assert(ir->type->is_integer_32());
 548       break;
 549
 550    case ir_unop_bit_count:
 551    case ir_unop_find_msb:
 552    case ir_unop_find_lsb:
 553       assert(ir->operands[0]->type->vector_elements == ir->type->vector_elements);
 554       assert(ir->operands[0]->type->is_integer_32());
 555       assert(ir->type->base_type == GLSL_TYPE_INT);
 556       break;
 557
 558    case ir_unop_clz:
 559       assert(ir->operands[0]->type == ir->type);
 560       assert(ir->type->base_type == GLSL_TYPE_UINT);
 561       break;
 562
 563    case ir_unop_noise:
 564       /* XXX what can we assert here? */
 565       break;
 566
 567    case ir_unop_interpolate_at_centroid:
 568       assert(ir->operands[0]->type == ir->type);
 569       assert(ir->operands[0]->type->is_float());
 570       break;
 571
 572    case ir_unop_get_buffer_size:
 573       assert(ir->type == glsl_type::int_type);
 574       assert(ir->operands[0]->type == glsl_type::uint_type);
 575       break;
 576
 577    case ir_unop_ssbo_unsized_array_length:
 578       assert(ir->type == glsl_type::int_type);
 579       assert(ir->operands[0]->type->is_array());
 580       assert(ir->operands[0]->type->is_unsized_array());
 581       break;
 582
 583    case ir_unop_d2f:
 584       assert(ir->operands[0]->type->is_double());
 585       assert(ir->type->is_float());
 586       break;
 587    case ir_unop_f2d:
 588       assert(ir->operands[0]->type->is_float());
 589       assert(ir->type->is_double());
 590       break;
 591    case ir_unop_f162f:
 592       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT16);
 593       assert(ir->type->is_float());
 594       break;
 595    case ir_unop_f2f16:
 596       assert(ir->operands[0]->type->is_float());
 597       assert(ir->type->base_type == GLSL_TYPE_FLOAT16);
 598       break;
 599    case ir_unop_d2i:
 600       assert(ir->operands[0]->type->is_double());
 601       assert(ir->type->base_type == GLSL_TYPE_INT);
 602       break;
 603    case ir_unop_i2d:
 604       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 605       assert(ir->type->is_double());
 606       break;
 607    case ir_unop_d2u:
 608       assert(ir->operands[0]->type->is_double());
 609       assert(ir->type->base_type == GLSL_TYPE_UINT);
 610       break;
 611    case ir_unop_u2d:
 612       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 613       assert(ir->type->is_double());
 614       break;
 615    case ir_unop_d2b:
 616       assert(ir->operands[0]->type->is_double());
 617       assert(ir->type->is_boolean());
 618       break;
 619
 620    case ir_unop_frexp_sig:
 621       assert(ir->operands[0]->type->is_float() ||
 622              ir->operands[0]->type->is_double());
 623       assert(ir->type->is_double());
 624       break;
 625    case ir_unop_frexp_exp:
 626       assert(ir->operands[0]->type->is_float() ||
 627              ir->operands[0]->type->is_double());
 628       assert(ir->type->base_type == GLSL_TYPE_INT);
 629       break;
 630    case ir_unop_subroutine_to_int:
 631       assert(ir->operands[0]->type->base_type == GLSL_TYPE_SUBROUTINE);
 632       assert(ir->type->base_type == GLSL_TYPE_INT);
 633       break;
 634
 635    case ir_unop_atan:
 636       assert(ir->operands[0]->type->is_float() ||
 637              ir->operands[0]->type->is_double());
 638       assert(ir->type == ir->operands[0]->type);
 639       break;
 640
 641    case ir_binop_add:
 642    case ir_binop_sub:
 643    case ir_binop_mul:
 644    case ir_binop_div:
 645    case ir_binop_mod:
 646    case ir_binop_min:
 647    case ir_binop_max:
 648    case ir_binop_pow:
 649       assert(ir->operands[0]->type->base_type ==
 650              ir->operands[1]->type->base_type);
 651
 652       if (ir->operation == ir_binop_mul &&
 653           (ir->type->base_type == GLSL_TYPE_UINT64 ||
 654            ir->type->base_type == GLSL_TYPE_INT64) &&
 655           (ir->operands[0]->type->base_type == GLSL_TYPE_INT ||
 656            ir->operands[1]->type->base_type == GLSL_TYPE_INT ||
 657            ir->operands[0]->type->base_type == GLSL_TYPE_UINT ||
 658            ir->operands[1]->type->base_type == GLSL_TYPE_UINT)) {
 659          assert(ir->operands[0]->type == ir->operands[1]->type);
 660          break;
 661       }
 662
 663       if (ir->operands[0]->type->is_scalar())
 664          assert(ir->operands[1]->type == ir->type);
 665       else if (ir->operands[1]->type->is_scalar())
 666          assert(ir->operands[0]->type == ir->type);
 667       else if (ir->operands[0]->type->is_vector() &&
 668                ir->operands[1]->type->is_vector()) {
 669          assert(ir->operands[0]->type == ir->operands[1]->type);
 670          assert(ir->operands[0]->type == ir->type);
 671       }
 672       break;
 673
 674    case ir_binop_abs_sub:
 675       assert(ir->operands[0]->type == ir->operands[1]->type);
 676       assert(ir->operands[0]->type->is_integer_32_64());
 677       assert(ir->operands[0]->type->vector_elements ==
 678              ir->type->vector_elements);
 679       assert(ir->type->base_type == GLSL_TYPE_UINT ||
 680              ir->type->base_type == GLSL_TYPE_UINT64);
 681       break;
 682
 683    case ir_binop_add_sat:
 684    case ir_binop_sub_sat:
 685    case ir_binop_avg:
 686    case ir_binop_avg_round:
 687       assert(ir->type == ir->operands[0]->type);
 688       assert(ir->type == ir->operands[1]->type);
 689       assert(ir->type->is_integer_32_64());
 690       break;
 691
 692    case ir_binop_mul_32x16:
 693    case ir_binop_imul_high:
 694       assert(ir->type == ir->operands[0]->type);
 695       assert(ir->type == ir->operands[1]->type);
 696       assert(ir->type->is_integer_32());
 697       break;
 698
 699    case ir_binop_carry:
 700    case ir_binop_borrow:
 701       assert(ir->type == ir->operands[0]->type);
 702       assert(ir->type == ir->operands[1]->type);
 703       assert(ir->type->base_type == GLSL_TYPE_UINT);
 704       break;
 705
 706    case ir_binop_less:
 707    case ir_binop_gequal:
 708    case ir_binop_equal:
 709    case ir_binop_nequal:
 710       /* The semantics of the IR operators differ from the GLSL <, >, <=, >=,
 711        * ==, and != operators.  The IR operators perform a component-wise
 712        * comparison on scalar or vector types and return a boolean scalar or
 713        * vector type of the same size.
 714        */
 715       assert(ir->type->is_boolean());
 716       assert(ir->operands[0]->type == ir->operands[1]->type);
 717       assert(ir->operands[0]->type->is_vector()
 718              || ir->operands[0]->type->is_scalar());
 719       assert(ir->operands[0]->type->vector_elements
 720              == ir->type->vector_elements);
 721       break;
 722
 723    case ir_binop_all_equal:
 724    case ir_binop_any_nequal:
 725       /* GLSL == and != operate on scalars, vectors, matrices and arrays, and
 726        * return a scalar boolean.  The IR matches that.
 727        */
 728       assert(ir->type == glsl_type::bool_type);
 729       assert(ir->operands[0]->type == ir->operands[1]->type);
 730       break;
 731
 732    case ir_binop_lshift:
 733    case ir_binop_rshift:
 734       assert(ir->operands[0]->type->is_integer_32_64() &&
 735              ir->operands[1]->type->is_integer_32());
 736       if (ir->operands[0]->type->is_scalar()) {
 737           assert(ir->operands[1]->type->is_scalar());
 738       }
 739       if (ir->operands[0]->type->is_vector() &&
 740           ir->operands[1]->type->is_vector()) {
 741           assert(ir->operands[0]->type->components() ==
 742                  ir->operands[1]->type->components());
 743       }
 744       assert(ir->type == ir->operands[0]->type);
 745       break;
 746
 747    case ir_binop_bit_and:
 748    case ir_binop_bit_xor:
 749    case ir_binop_bit_or:
 750        assert(ir->operands[0]->type->base_type ==
 751               ir->operands[1]->type->base_type);
 752        assert(ir->type->is_integer_32_64());
 753        if (ir->operands[0]->type->is_vector() &&
 754            ir->operands[1]->type->is_vector()) {
 755            assert(ir->operands[0]->type->vector_elements ==
 756                   ir->operands[1]->type->vector_elements);
 757        }
 758        break;
 759
 760    case ir_binop_logic_and:
 761    case ir_binop_logic_xor:
 762    case ir_binop_logic_or:
 763       assert(ir->type->is_boolean());
 764       assert(ir->operands[0]->type->is_boolean());
 765       assert(ir->operands[1]->type->is_boolean());
 766       break;
 767
 768    case ir_binop_dot:
 769       assert(ir->type == glsl_type::float_type ||
 770              ir->type == glsl_type::double_type);
 771       assert(ir->operands[0]->type->is_float() ||
 772              ir->operands[0]->type->is_double());
 773       assert(ir->operands[0]->type->is_vector());
 774       assert(ir->operands[0]->type == ir->operands[1]->type);
 775       break;
 776
 777    case ir_binop_ubo_load:
 778       assert(ir->operands[0]->type == glsl_type::uint_type);
 779
 780       assert(ir->operands[1]->type == glsl_type::uint_type);
 781       break;
 782
 783    case ir_binop_ldexp:
 784       assert(ir->operands[0]->type == ir->type);
 785       assert(ir->operands[0]->type->is_float() ||
 786              ir->operands[0]->type->is_double());
 787       assert(ir->operands[1]->type->base_type == GLSL_TYPE_INT);
 788       assert(ir->operands[0]->type->components() ==
 789              ir->operands[1]->type->components());
 790       break;
 791
 792    case ir_binop_vector_extract:
 793       assert(ir->operands[0]->type->is_vector());
 794       assert(ir->operands[1]->type->is_scalar()
 795              && ir->operands[1]->type->is_integer_32());
 796       break;
 797
 798    case ir_binop_interpolate_at_offset:
 799       assert(ir->operands[0]->type == ir->type);
 800       assert(ir->operands[0]->type->is_float());
 801       assert(ir->operands[1]->type->components() == 2);
 802       assert(ir->operands[1]->type->is_float());
 803       break;
 804
 805    case ir_binop_interpolate_at_sample:
 806       assert(ir->operands[0]->type == ir->type);
 807       assert(ir->operands[0]->type->is_float());
 808       assert(ir->operands[1]->type == glsl_type::int_type);
 809       break;
 810
 811    case ir_binop_atan2:
 812       assert(ir->operands[0]->type->is_float() ||
 813              ir->operands[0]->type->is_double());
 814       assert(ir->operands[1]->type == ir->operands[0]->type);
 815       assert(ir->type == ir->operands[0]->type);
 816       break;
 817
 818    case ir_triop_fma:
 819       assert(ir->type->is_float() ||
 820              ir->type->is_double());
 821       assert(ir->type == ir->operands[0]->type);
 822       assert(ir->type == ir->operands[1]->type);
 823       assert(ir->type == ir->operands[2]->type);
 824       break;
 825
 826    case ir_triop_lrp:
 827       assert(ir->operands[0]->type->is_float() ||
 828              ir->operands[0]->type->is_double());
 829       assert(ir->operands[0]->type == ir->operands[1]->type);
 830       assert(ir->operands[2]->type == ir->operands[0]->type ||
 831              ir->operands[2]->type == glsl_type::float_type ||
 832              ir->operands[2]->type == glsl_type::double_type);
 833       break;
 834
 835    case ir_triop_csel:
 836       assert(ir->operands[0]->type->is_boolean());
 837       assert(ir->type->vector_elements == ir->operands[0]->type->vector_elements);
 838       assert(ir->type == ir->operands[1]->type);
 839       assert(ir->type == ir->operands[2]->type);
 840       break;
 841
 842    case ir_triop_bitfield_extract:
 843       assert(ir->type->is_integer_32());
 844       assert(ir->operands[0]->type == ir->type);
 845       assert(ir->operands[1]->type == ir->type);
 846       assert(ir->operands[2]->type == ir->type);
 847       break;
 848
 849    case ir_triop_vector_insert:
 850       assert(ir->operands[0]->type->is_vector());
 851       assert(ir->operands[1]->type->is_scalar());
 852       assert(ir->operands[0]->type->base_type == ir->operands[1]->type->base_type);
 853       assert(ir->operands[2]->type->is_scalar()
 854              && ir->operands[2]->type->is_integer_32());
 855       assert(ir->type == ir->operands[0]->type);
 856       break;
 857
 858    case ir_quadop_bitfield_insert:
 859       assert(ir->type->is_integer_32());
 860       assert(ir->operands[0]->type == ir->type);
 861       assert(ir->operands[1]->type == ir->type);
 862       assert(ir->operands[2]->type == ir->type);
 863       assert(ir->operands[3]->type == ir->type);
 864       break;
 865
 866    case ir_quadop_vector:
 867       /* The vector operator collects some number of scalars and generates a
 868        * vector from them.
 869        *
 870        *  - All of the operands must be scalar.
 871        *  - Number of operands must matche the size of the resulting vector.
 872        *  - Base type of the operands must match the base type of the result.
 873        */
 874       assert(ir->type->is_vector());
 875       switch (ir->type->vector_elements) {
 876       case 2:
 877          assert(ir->operands[0]->type->is_scalar());
 878          assert(ir->operands[0]->type->base_type == ir->type->base_type);
 879          assert(ir->operands[1]->type->is_scalar());
 880          assert(ir->operands[1]->type->base_type == ir->type->base_type);
 881          assert(ir->operands[2] == NULL);
 882          assert(ir->operands[3] == NULL);
 883          break;
 884       case 3:
 885          assert(ir->operands[0]->type->is_scalar());
 886          assert(ir->operands[0]->type->base_type == ir->type->base_type);
 887          assert(ir->operands[1]->type->is_scalar());
 888          assert(ir->operands[1]->type->base_type == ir->type->base_type);
 889          assert(ir->operands[2]->type->is_scalar());
 890          assert(ir->operands[2]->type->base_type == ir->type->base_type);
 891          assert(ir->operands[3] == NULL);
 892          break;
 893       case 4:
 894          assert(ir->operands[0]->type->is_scalar());
 895          assert(ir->operands[0]->type->base_type == ir->type->base_type);
 896          assert(ir->operands[1]->type->is_scalar());
 897          assert(ir->operands[1]->type->base_type == ir->type->base_type);
 898          assert(ir->operands[2]->type->is_scalar());
 899          assert(ir->operands[2]->type->base_type == ir->type->base_type);
 900          assert(ir->operands[3]->type->is_scalar());
 901          assert(ir->operands[3]->type->base_type == ir->type->base_type);
 902          break;
 903       default:
 904          /* The is_vector assertion above should prevent execution from ever
 905           * getting here.
 906           */
 907          assert(!"Should not get here.");
 908          break;
 909       }
 910    }
 911
 912    return visit_continue;
 913 }
 914
 915 ir_visitor_status
 916 ir_validate::visit_leave(ir_swizzle *ir)
 917 {
 918    unsigned int chans[4] = {ir->mask.x, ir->mask.y, ir->mask.z, ir->mask.w};
 919
 920    for (unsigned int i = 0; i < ir->type->vector_elements; i++) {
 921       if (chans[i] >= ir->val->type->vector_elements) {
 922          printf("ir_swizzle @ %p specifies a channel not present "
 923                 "in the value.\n", (void *) ir);
 924          ir->print();
 925          abort();
 926       }
 927    }
 928
 929    return visit_continue;
 930 }
 931
 932 ir_visitor_status
 933 ir_validate::visit(ir_variable *ir)
 934 {
 935    /* An ir_variable is the one thing that can (and will) appear multiple times
 936     * in an IR tree.  It is added to the hashtable so that it can be used
 937     * in the ir_dereference_variable handler to ensure that a variable is
 938     * declared before it is dereferenced.
 939     */
 940    if (ir->name && ir->is_name_ralloced())
 941       assert(ralloc_parent(ir->name) == ir);
 942
 943    _mesa_set_add(ir_set, ir);
 944
 945    /* If a variable is an array, verify that the maximum array index is in
 946     * bounds.  There was once an error in AST-to-HIR conversion that set this
 947     * to be out of bounds.
 948     */
 949    if (ir->type->array_size() > 0) {
 950       if (ir->data.max_array_access >= (int)ir->type->length) {
 951          printf("ir_variable has maximum access out of bounds (%d vs %d)\n",
 952                 ir->data.max_array_access, ir->type->length - 1);
 953          ir->print();
 954          abort();
 955       }
 956    }
 957
 958    /* If a variable is an interface block (or an array of interface blocks),
 959     * verify that the maximum array index for each interface member is in
 960     * bounds.
 961     */
 962    if (ir->is_interface_instance()) {
 963       const glsl_struct_field *fields =
 964          ir->get_interface_type()->fields.structure;
 965       for (unsigned i = 0; i < ir->get_interface_type()->length; i++) {
 966          if (fields[i].type->array_size() > 0 &&
 967              !fields[i].implicit_sized_array) {
 968             const int *const max_ifc_array_access =
 969                ir->get_max_ifc_array_access();
 970
 971             assert(max_ifc_array_access != NULL);
 972
 973             if (max_ifc_array_access[i] >= (int)fields[i].type->length) {
 974                printf("ir_variable has maximum access out of bounds for "
 975                       "field %s (%d vs %d)\n", fields[i].name,
 976                       max_ifc_array_access[i], fields[i].type->length);
 977                ir->print();
 978                abort();
 979             }
 980          }
 981       }
 982    }
 983
 984    if (ir->constant_initializer != NULL && !ir->data.has_initializer) {
 985       printf("ir_variable didn't have an initializer, but has a constant "
 986              "initializer value.\n");
 987       ir->print();
 988       abort();
 989    }
 990
 991    if (ir->data.mode == ir_var_uniform
 992        && is_gl_identifier(ir->name)
 993        && ir->get_state_slots() == NULL) {
 994       printf("built-in uniform has no state\n");
 995       ir->print();
 996       abort();
 997    }
 998
 999    return visit_continue;
1000 }
1001
1002 ir_visitor_status
1003 ir_validate::visit_enter(ir_assignment *ir)
1004 {
1005    const ir_dereference *const lhs = ir->lhs;
1006    if (lhs->type->is_scalar() || lhs->type->is_vector()) {
1007       if (ir->write_mask == 0) {
1008          printf("Assignment LHS is %s, but write mask is 0:\n",
1009                 lhs->type->is_scalar() ? "scalar" : "vector");
1010          ir->print();
1011          abort();
1012       }
1013
1014       int lhs_components = 0;
1015       for (int i = 0; i < 4; i++) {
1016          if (ir->write_mask & (1 << i))
1017             lhs_components++;
1018       }
1019
1020       if (lhs_components != ir->rhs->type->vector_elements) {
1021          printf("Assignment count of LHS write mask channels enabled not\n"
1022                 "matching RHS vector size (%d LHS, %d RHS).\n",
1023                 lhs_components, ir->rhs->type->vector_elements);
1024          ir->print();
1025          abort();
1026       }
1027    }
1028
1029    this->validate_ir(ir, this->data_enter);
1030
1031    return visit_continue;
1032 }
1033
1034 ir_visitor_status
1035 ir_validate::visit_enter(ir_call *ir)
1036 {
1037    ir_function_signature *const callee = ir->callee;
1038
1039    if (callee->ir_type != ir_type_function_signature) {
1040       printf("IR called by ir_call is not ir_function_signature!\n");
1041       abort();
1042    }
1043
1044    if (ir->return_deref) {
1045       if (ir->return_deref->type != callee->return_type) {
1046          printf("callee type %s does not match return storage type %s\n",
1047                 callee->return_type->name, ir->return_deref->type->name);
1048          abort();
1049       }
1050    } else if (callee->return_type != glsl_type::void_type) {
1051       printf("ir_call has non-void callee but no return storage\n");
1052       abort();
1053    }
1054
1055    const exec_node *formal_param_node = callee->parameters.get_head_raw();
1056    const exec_node *actual_param_node = ir->actual_parameters.get_head_raw();
1057    while (true) {
1058       if (formal_param_node->is_tail_sentinel()
1059           != actual_param_node->is_tail_sentinel()) {
1060          printf("ir_call has the wrong number of parameters:\n");
1061          goto dump_ir;
1062       }
1063       if (formal_param_node->is_tail_sentinel()) {
1064          break;
1065       }
1066       const ir_variable *formal_param
1067          = (const ir_variable *) formal_param_node;
1068       const ir_rvalue *actual_param
1069          = (const ir_rvalue *) actual_param_node;
1070       if (formal_param->type != actual_param->type) {
1071          printf("ir_call parameter type mismatch:\n");
1072          goto dump_ir;
1073       }
1074       if (formal_param->data.mode == ir_var_function_out
1075           || formal_param->data.mode == ir_var_function_inout) {
1076          if (!actual_param->is_lvalue()) {
1077             printf("ir_call out/inout parameters must be lvalues:\n");
1078             goto dump_ir;
1079          }
1080       }
1081       formal_param_node = formal_param_node->next;
1082       actual_param_node = actual_param_node->next;
1083    }
1084
1085    return visit_continue;
1086
1087 dump_ir:
1088    ir->print();
1089    printf("callee:\n");
1090    callee->print();
1091    abort();
1092    return visit_stop;
1093 }
1094
1095 void
1096 ir_validate::validate_ir(ir_instruction *ir, void *data)
1097 {
1098    struct set *ir_set = (struct set *) data;
1099
1100    if (_mesa_set_search(ir_set, ir)) {
1101       printf("Instruction node present twice in ir tree:\n");
1102       ir->print();
1103       printf("\n");
1104       abort();
1105    }
1106    _mesa_set_add(ir_set, ir);
1107 }
1108
1109 #ifdef DEBUG
1110 static void
1111 check_node_type(ir_instruction *ir, void *data)
1112 {
1113    (void) data;
1114
1115    if (ir->ir_type >= ir_type_max) {
1116       printf("Instruction node with unset type\n");
1117       ir->print(); printf("\n");
1118    }
1119    ir_rvalue *value = ir->as_rvalue();
1120    if (value != NULL)
1121       assert(value->type != glsl_type::error_type);
1122 }
1123 #endif
1124
1125 void
1126 validate_ir_tree(exec_list *instructions)
1127 {
1128    /* We shouldn't have any reason to validate IR in a release build,
1129     * and it's half composed of assert()s anyway which wouldn't do
1130     * anything.
1131     */
1132 #ifdef DEBUG
1133    ir_validate v;
1134
1135    v.run(instructions);
1136
1137    foreach_in_list(ir_instruction, ir, instructions) {
1138       visit_tree(ir, check_node_type, NULL);
1139    }
1140 #endif
1141 }