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/set.h"
  40 #include "compiler/glsl_types.h"
  41
  42 namespace {
  43
  44 class ir_validate : public ir_hierarchical_visitor {
  45 public:
  46    ir_validate()
  47    {
  48       this->ir_set = _mesa_set_create(NULL, _mesa_hash_pointer,
  49                                       _mesa_key_pointer_equal);
  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()) {
 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_b2f:
 303       assert(ir->operands[0]->type->is_boolean());
 304       assert(ir->type->is_float());
 305       break;
 306    case ir_unop_i2b:
 307       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 308       assert(ir->type->is_boolean());
 309       break;
 310    case ir_unop_b2i:
 311       assert(ir->operands[0]->type->is_boolean());
 312       assert(ir->type->base_type == GLSL_TYPE_INT);
 313       break;
 314    case ir_unop_u2f:
 315       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 316       assert(ir->type->is_float());
 317       break;
 318    case ir_unop_i2u:
 319       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 320       assert(ir->type->base_type == GLSL_TYPE_UINT);
 321       break;
 322    case ir_unop_u2i:
 323       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 324       assert(ir->type->base_type == GLSL_TYPE_INT);
 325       break;
 326    case ir_unop_bitcast_i2f:
 327       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 328       assert(ir->type->is_float());
 329       break;
 330    case ir_unop_bitcast_f2i:
 331       assert(ir->operands[0]->type->is_float());
 332       assert(ir->type->base_type == GLSL_TYPE_INT);
 333       break;
 334    case ir_unop_bitcast_u2f:
 335       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 336       assert(ir->type->is_float());
 337       break;
 338    case ir_unop_bitcast_f2u:
 339       assert(ir->operands[0]->type->is_float());
 340       assert(ir->type->base_type == GLSL_TYPE_UINT);
 341       break;
 342
 343    case ir_unop_bitcast_u642d:
 344       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT64);
 345       assert(ir->type->is_double());
 346       break;
 347    case ir_unop_bitcast_i642d:
 348       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT64);
 349       assert(ir->type->is_double());
 350       break;
 351    case ir_unop_bitcast_d2u64:
 352       assert(ir->operands[0]->type->is_double());
 353       assert(ir->type->base_type == GLSL_TYPE_UINT64);
 354       break;
 355    case ir_unop_bitcast_d2i64:
 356       assert(ir->operands[0]->type->is_double());
 357       assert(ir->type->base_type == GLSL_TYPE_INT64);
 358       break;
 359    case ir_unop_i642i:
 360       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT64);
 361       assert(ir->type->base_type == GLSL_TYPE_INT);
 362       break;
 363    case ir_unop_u642i:
 364       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT64);
 365       assert(ir->type->base_type == GLSL_TYPE_INT);
 366       break;
 367    case ir_unop_i642u:
 368       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT64);
 369       assert(ir->type->base_type == GLSL_TYPE_UINT);
 370       break;
 371    case ir_unop_u642u:
 372       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT64);
 373       assert(ir->type->base_type == GLSL_TYPE_UINT);
 374       break;
 375    case ir_unop_i642b:
 376       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT64);
 377       assert(ir->type->is_boolean());
 378       break;
 379    case ir_unop_i642f:
 380       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT64);
 381       assert(ir->type->is_float());
 382       break;
 383    case ir_unop_u642f:
 384       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT64);
 385       assert(ir->type->is_float());
 386       break;
 387    case ir_unop_i642d:
 388       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT64);
 389       assert(ir->type->is_double());
 390       break;
 391    case ir_unop_u642d:
 392       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT64);
 393       assert(ir->type->is_double());
 394       break;
 395    case ir_unop_i2i64:
 396       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 397       assert(ir->type->base_type == GLSL_TYPE_INT64);
 398       break;
 399    case ir_unop_u2i64:
 400       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 401       assert(ir->type->base_type == GLSL_TYPE_INT64);
 402       break;
 403    case ir_unop_b2i64:
 404       assert(ir->operands[0]->type->is_boolean());
 405       assert(ir->type->base_type == GLSL_TYPE_INT64);
 406       break;
 407    case ir_unop_f2i64:
 408       assert(ir->operands[0]->type->is_float());
 409       assert(ir->type->base_type == GLSL_TYPE_INT64);
 410       break;
 411    case ir_unop_d2i64:
 412       assert(ir->operands[0]->type->is_double());
 413       assert(ir->type->base_type == GLSL_TYPE_INT64);
 414       break;
 415    case ir_unop_i2u64:
 416       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 417       assert(ir->type->base_type == GLSL_TYPE_UINT64);
 418       break;
 419    case ir_unop_u2u64:
 420       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 421       assert(ir->type->base_type == GLSL_TYPE_UINT64);
 422       break;
 423    case ir_unop_f2u64:
 424       assert(ir->operands[0]->type->is_float());
 425       assert(ir->type->base_type == GLSL_TYPE_UINT64);
 426       break;
 427    case ir_unop_d2u64:
 428       assert(ir->operands[0]->type->is_double());
 429       assert(ir->type->base_type == GLSL_TYPE_UINT64);
 430       break;
 431    case ir_unop_u642i64:
 432       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT64);
 433       assert(ir->type->base_type == GLSL_TYPE_INT64);
 434       break;
 435    case ir_unop_i642u64:
 436       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT64);
 437       assert(ir->type->base_type == GLSL_TYPE_UINT64);
 438       break;
 439    case ir_unop_trunc:
 440    case ir_unop_round_even:
 441    case ir_unop_ceil:
 442    case ir_unop_floor:
 443    case ir_unop_fract:
 444       assert(ir->operands[0]->type->is_float() ||
 445              ir->operands[0]->type->is_double());
 446       assert(ir->operands[0]->type == ir->type);
 447       break;
 448    case ir_unop_sin:
 449    case ir_unop_cos:
 450    case ir_unop_dFdx:
 451    case ir_unop_dFdx_coarse:
 452    case ir_unop_dFdx_fine:
 453    case ir_unop_dFdy:
 454    case ir_unop_dFdy_coarse:
 455    case ir_unop_dFdy_fine:
 456       assert(ir->operands[0]->type->is_float());
 457       assert(ir->operands[0]->type == ir->type);
 458       break;
 459
 460    case ir_unop_pack_snorm_2x16:
 461    case ir_unop_pack_unorm_2x16:
 462    case ir_unop_pack_half_2x16:
 463       assert(ir->type == glsl_type::uint_type);
 464       assert(ir->operands[0]->type == glsl_type::vec2_type);
 465       break;
 466
 467    case ir_unop_pack_snorm_4x8:
 468    case ir_unop_pack_unorm_4x8:
 469       assert(ir->type == glsl_type::uint_type);
 470       assert(ir->operands[0]->type == glsl_type::vec4_type);
 471       break;
 472
 473    case ir_unop_pack_double_2x32:
 474       assert(ir->type == glsl_type::double_type);
 475       assert(ir->operands[0]->type == glsl_type::uvec2_type);
 476       break;
 477
 478    case ir_unop_pack_int_2x32:
 479       assert(ir->type == glsl_type::int64_t_type);
 480       assert(ir->operands[0]->type == glsl_type::ivec2_type);
 481       break;
 482
 483    case ir_unop_pack_uint_2x32:
 484       assert(ir->type == glsl_type::uint64_t_type);
 485       assert(ir->operands[0]->type == glsl_type::uvec2_type);
 486       break;
 487
 488    case ir_unop_pack_sampler_2x32:
 489       assert(ir->type->is_sampler());
 490       assert(ir->operands[0]->type == glsl_type::uvec2_type);
 491       break;
 492
 493    case ir_unop_pack_image_2x32:
 494       assert(ir->type->is_image());
 495       assert(ir->operands[0]->type == glsl_type::uvec2_type);
 496       break;
 497
 498    case ir_unop_unpack_snorm_2x16:
 499    case ir_unop_unpack_unorm_2x16:
 500    case ir_unop_unpack_half_2x16:
 501       assert(ir->type == glsl_type::vec2_type);
 502       assert(ir->operands[0]->type == glsl_type::uint_type);
 503       break;
 504
 505    case ir_unop_unpack_snorm_4x8:
 506    case ir_unop_unpack_unorm_4x8:
 507       assert(ir->type == glsl_type::vec4_type);
 508       assert(ir->operands[0]->type == glsl_type::uint_type);
 509       break;
 510
 511    case ir_unop_unpack_double_2x32:
 512       assert(ir->type == glsl_type::uvec2_type);
 513       assert(ir->operands[0]->type == glsl_type::double_type);
 514       break;
 515
 516    case ir_unop_unpack_int_2x32:
 517       assert(ir->type == glsl_type::ivec2_type);
 518       assert(ir->operands[0]->type == glsl_type::int64_t_type);
 519       break;
 520
 521    case ir_unop_unpack_uint_2x32:
 522       assert(ir->type == glsl_type::uvec2_type);
 523       assert(ir->operands[0]->type == glsl_type::uint64_t_type);
 524       break;
 525
 526    case ir_unop_unpack_sampler_2x32:
 527       assert(ir->type == glsl_type::uvec2_type);
 528       assert(ir->operands[0]->type->is_sampler());
 529       break;
 530
 531    case ir_unop_unpack_image_2x32:
 532       assert(ir->type == glsl_type::uvec2_type);
 533       assert(ir->operands[0]->type->is_image());
 534       break;
 535
 536    case ir_unop_bitfield_reverse:
 537       assert(ir->operands[0]->type == ir->type);
 538       assert(ir->type->is_integer());
 539       break;
 540
 541    case ir_unop_bit_count:
 542    case ir_unop_find_msb:
 543    case ir_unop_find_lsb:
 544       assert(ir->operands[0]->type->vector_elements == ir->type->vector_elements);
 545       assert(ir->operands[0]->type->is_integer());
 546       assert(ir->type->base_type == GLSL_TYPE_INT);
 547       break;
 548
 549    case ir_unop_noise:
 550       /* XXX what can we assert here? */
 551       break;
 552
 553    case ir_unop_interpolate_at_centroid:
 554       assert(ir->operands[0]->type == ir->type);
 555       assert(ir->operands[0]->type->is_float());
 556       break;
 557
 558    case ir_unop_get_buffer_size:
 559       assert(ir->type == glsl_type::int_type);
 560       assert(ir->operands[0]->type == glsl_type::uint_type);
 561       break;
 562
 563    case ir_unop_ssbo_unsized_array_length:
 564       assert(ir->type == glsl_type::int_type);
 565       assert(ir->operands[0]->type->is_array());
 566       assert(ir->operands[0]->type->is_unsized_array());
 567       break;
 568
 569    case ir_unop_d2f:
 570       assert(ir->operands[0]->type->is_double());
 571       assert(ir->type->is_float());
 572       break;
 573    case ir_unop_f2d:
 574       assert(ir->operands[0]->type->is_float());
 575       assert(ir->type->is_double());
 576       break;
 577    case ir_unop_d2i:
 578       assert(ir->operands[0]->type->is_double());
 579       assert(ir->type->base_type == GLSL_TYPE_INT);
 580       break;
 581    case ir_unop_i2d:
 582       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 583       assert(ir->type->is_double());
 584       break;
 585    case ir_unop_d2u:
 586       assert(ir->operands[0]->type->is_double());
 587       assert(ir->type->base_type == GLSL_TYPE_UINT);
 588       break;
 589    case ir_unop_u2d:
 590       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 591       assert(ir->type->is_double());
 592       break;
 593    case ir_unop_d2b:
 594       assert(ir->operands[0]->type->is_double());
 595       assert(ir->type->is_boolean());
 596       break;
 597
 598    case ir_unop_frexp_sig:
 599       assert(ir->operands[0]->type->is_float() ||
 600              ir->operands[0]->type->is_double());
 601       assert(ir->type->is_double());
 602       break;
 603    case ir_unop_frexp_exp:
 604       assert(ir->operands[0]->type->is_float() ||
 605              ir->operands[0]->type->is_double());
 606       assert(ir->type->base_type == GLSL_TYPE_INT);
 607       break;
 608    case ir_unop_subroutine_to_int:
 609       assert(ir->operands[0]->type->base_type == GLSL_TYPE_SUBROUTINE);
 610       assert(ir->type->base_type == GLSL_TYPE_INT);
 611       break;
 612
 613    case ir_binop_add:
 614    case ir_binop_sub:
 615    case ir_binop_mul:
 616    case ir_binop_div:
 617    case ir_binop_mod:
 618    case ir_binop_min:
 619    case ir_binop_max:
 620    case ir_binop_pow:
 621       assert(ir->operands[0]->type->base_type ==
 622              ir->operands[1]->type->base_type);
 623
 624       if (ir->operands[0]->type->is_scalar())
 625          assert(ir->operands[1]->type == ir->type);
 626       else if (ir->operands[1]->type->is_scalar())
 627          assert(ir->operands[0]->type == ir->type);
 628       else if (ir->operands[0]->type->is_vector() &&
 629                ir->operands[1]->type->is_vector()) {
 630          assert(ir->operands[0]->type == ir->operands[1]->type);
 631          assert(ir->operands[0]->type == ir->type);
 632       }
 633       break;
 634
 635    case ir_binop_imul_high:
 636       assert(ir->type == ir->operands[0]->type);
 637       assert(ir->type == ir->operands[1]->type);
 638       assert(ir->type->is_integer());
 639       break;
 640
 641    case ir_binop_carry:
 642    case ir_binop_borrow:
 643       assert(ir->type == ir->operands[0]->type);
 644       assert(ir->type == ir->operands[1]->type);
 645       assert(ir->type->base_type == GLSL_TYPE_UINT);
 646       break;
 647
 648    case ir_binop_less:
 649    case ir_binop_greater:
 650    case ir_binop_lequal:
 651    case ir_binop_gequal:
 652    case ir_binop_equal:
 653    case ir_binop_nequal:
 654       /* The semantics of the IR operators differ from the GLSL <, >, <=, >=,
 655        * ==, and != operators.  The IR operators perform a component-wise
 656        * comparison on scalar or vector types and return a boolean scalar or
 657        * vector type of the same size.
 658        */
 659       assert(ir->type->is_boolean());
 660       assert(ir->operands[0]->type == ir->operands[1]->type);
 661       assert(ir->operands[0]->type->is_vector()
 662              || ir->operands[0]->type->is_scalar());
 663       assert(ir->operands[0]->type->vector_elements
 664              == ir->type->vector_elements);
 665       break;
 666
 667    case ir_binop_all_equal:
 668    case ir_binop_any_nequal:
 669       /* GLSL == and != operate on scalars, vectors, matrices and arrays, and
 670        * return a scalar boolean.  The IR matches that.
 671        */
 672       assert(ir->type == glsl_type::bool_type);
 673       assert(ir->operands[0]->type == ir->operands[1]->type);
 674       break;
 675
 676    case ir_binop_lshift:
 677    case ir_binop_rshift:
 678       assert(ir->operands[0]->type->is_integer_32_64() &&
 679              ir->operands[1]->type->is_integer());
 680       if (ir->operands[0]->type->is_scalar()) {
 681           assert(ir->operands[1]->type->is_scalar());
 682       }
 683       if (ir->operands[0]->type->is_vector() &&
 684           ir->operands[1]->type->is_vector()) {
 685           assert(ir->operands[0]->type->components() ==
 686                  ir->operands[1]->type->components());
 687       }
 688       assert(ir->type == ir->operands[0]->type);
 689       break;
 690
 691    case ir_binop_bit_and:
 692    case ir_binop_bit_xor:
 693    case ir_binop_bit_or:
 694        assert(ir->operands[0]->type->base_type ==
 695               ir->operands[1]->type->base_type);
 696        assert(ir->type->is_integer_32_64());
 697        if (ir->operands[0]->type->is_vector() &&
 698            ir->operands[1]->type->is_vector()) {
 699            assert(ir->operands[0]->type->vector_elements ==
 700                   ir->operands[1]->type->vector_elements);
 701        }
 702        break;
 703
 704    case ir_binop_logic_and:
 705    case ir_binop_logic_xor:
 706    case ir_binop_logic_or:
 707       assert(ir->type->is_boolean());
 708       assert(ir->operands[0]->type->is_boolean());
 709       assert(ir->operands[1]->type->is_boolean());
 710       break;
 711
 712    case ir_binop_dot:
 713       assert(ir->type == glsl_type::float_type ||
 714              ir->type == glsl_type::double_type);
 715       assert(ir->operands[0]->type->is_float() ||
 716              ir->operands[0]->type->is_double());
 717       assert(ir->operands[0]->type->is_vector());
 718       assert(ir->operands[0]->type == ir->operands[1]->type);
 719       break;
 720
 721    case ir_binop_ubo_load:
 722       assert(ir->operands[0]->type == glsl_type::uint_type);
 723
 724       assert(ir->operands[1]->type == glsl_type::uint_type);
 725       break;
 726
 727    case ir_binop_ldexp:
 728       assert(ir->operands[0]->type == ir->type);
 729       assert(ir->operands[0]->type->is_float() ||
 730              ir->operands[0]->type->is_double());
 731       assert(ir->operands[1]->type->base_type == GLSL_TYPE_INT);
 732       assert(ir->operands[0]->type->components() ==
 733              ir->operands[1]->type->components());
 734       break;
 735
 736    case ir_binop_vector_extract:
 737       assert(ir->operands[0]->type->is_vector());
 738       assert(ir->operands[1]->type->is_scalar()
 739              && ir->operands[1]->type->is_integer());
 740       break;
 741
 742    case ir_binop_interpolate_at_offset:
 743       assert(ir->operands[0]->type == ir->type);
 744       assert(ir->operands[0]->type->is_float());
 745       assert(ir->operands[1]->type->components() == 2);
 746       assert(ir->operands[1]->type->is_float());
 747       break;
 748
 749    case ir_binop_interpolate_at_sample:
 750       assert(ir->operands[0]->type == ir->type);
 751       assert(ir->operands[0]->type->is_float());
 752       assert(ir->operands[1]->type == glsl_type::int_type);
 753       break;
 754
 755    case ir_triop_fma:
 756       assert(ir->type->is_float() ||
 757              ir->type->is_double());
 758       assert(ir->type == ir->operands[0]->type);
 759       assert(ir->type == ir->operands[1]->type);
 760       assert(ir->type == ir->operands[2]->type);
 761       break;
 762
 763    case ir_triop_lrp:
 764       assert(ir->operands[0]->type->is_float() ||
 765              ir->operands[0]->type->is_double());
 766       assert(ir->operands[0]->type == ir->operands[1]->type);
 767       assert(ir->operands[2]->type == ir->operands[0]->type ||
 768              ir->operands[2]->type == glsl_type::float_type ||
 769              ir->operands[2]->type == glsl_type::double_type);
 770       break;
 771
 772    case ir_triop_csel:
 773       assert(ir->operands[0]->type->is_boolean());
 774       assert(ir->type->vector_elements == ir->operands[0]->type->vector_elements);
 775       assert(ir->type == ir->operands[1]->type);
 776       assert(ir->type == ir->operands[2]->type);
 777       break;
 778
 779    case ir_triop_bitfield_extract:
 780       assert(ir->type->is_integer());
 781       assert(ir->operands[0]->type == ir->type);
 782       assert(ir->operands[1]->type == ir->type);
 783       assert(ir->operands[2]->type == ir->type);
 784       break;
 785
 786    case ir_triop_vector_insert:
 787       assert(ir->operands[0]->type->is_vector());
 788       assert(ir->operands[1]->type->is_scalar());
 789       assert(ir->operands[0]->type->base_type == ir->operands[1]->type->base_type);
 790       assert(ir->operands[2]->type->is_scalar()
 791              && ir->operands[2]->type->is_integer());
 792       assert(ir->type == ir->operands[0]->type);
 793       break;
 794
 795    case ir_quadop_bitfield_insert:
 796       assert(ir->type->is_integer());
 797       assert(ir->operands[0]->type == ir->type);
 798       assert(ir->operands[1]->type == ir->type);
 799       assert(ir->operands[2]->type == ir->type);
 800       assert(ir->operands[3]->type == ir->type);
 801       break;
 802
 803    case ir_quadop_vector:
 804       /* The vector operator collects some number of scalars and generates a
 805        * vector from them.
 806        *
 807        *  - All of the operands must be scalar.
 808        *  - Number of operands must matche the size of the resulting vector.
 809        *  - Base type of the operands must match the base type of the result.
 810        */
 811       assert(ir->type->is_vector());
 812       switch (ir->type->vector_elements) {
 813       case 2:
 814          assert(ir->operands[0]->type->is_scalar());
 815          assert(ir->operands[0]->type->base_type == ir->type->base_type);
 816          assert(ir->operands[1]->type->is_scalar());
 817          assert(ir->operands[1]->type->base_type == ir->type->base_type);
 818          assert(ir->operands[2] == NULL);
 819          assert(ir->operands[3] == NULL);
 820          break;
 821       case 3:
 822          assert(ir->operands[0]->type->is_scalar());
 823          assert(ir->operands[0]->type->base_type == ir->type->base_type);
 824          assert(ir->operands[1]->type->is_scalar());
 825          assert(ir->operands[1]->type->base_type == ir->type->base_type);
 826          assert(ir->operands[2]->type->is_scalar());
 827          assert(ir->operands[2]->type->base_type == ir->type->base_type);
 828          assert(ir->operands[3] == NULL);
 829          break;
 830       case 4:
 831          assert(ir->operands[0]->type->is_scalar());
 832          assert(ir->operands[0]->type->base_type == ir->type->base_type);
 833          assert(ir->operands[1]->type->is_scalar());
 834          assert(ir->operands[1]->type->base_type == ir->type->base_type);
 835          assert(ir->operands[2]->type->is_scalar());
 836          assert(ir->operands[2]->type->base_type == ir->type->base_type);
 837          assert(ir->operands[3]->type->is_scalar());
 838          assert(ir->operands[3]->type->base_type == ir->type->base_type);
 839          break;
 840       default:
 841          /* The is_vector assertion above should prevent execution from ever
 842           * getting here.
 843           */
 844          assert(!"Should not get here.");
 845          break;
 846       }
 847    }
 848
 849    return visit_continue;
 850 }
 851
 852 ir_visitor_status
 853 ir_validate::visit_leave(ir_swizzle *ir)
 854 {
 855    unsigned int chans[4] = {ir->mask.x, ir->mask.y, ir->mask.z, ir->mask.w};
 856
 857    for (unsigned int i = 0; i < ir->type->vector_elements; i++) {
 858       if (chans[i] >= ir->val->type->vector_elements) {
 859          printf("ir_swizzle @ %p specifies a channel not present "
 860                 "in the value.\n", (void *) ir);
 861          ir->print();
 862          abort();
 863       }
 864    }
 865
 866    return visit_continue;
 867 }
 868
 869 ir_visitor_status
 870 ir_validate::visit(ir_variable *ir)
 871 {
 872    /* An ir_variable is the one thing that can (and will) appear multiple times
 873     * in an IR tree.  It is added to the hashtable so that it can be used
 874     * in the ir_dereference_variable handler to ensure that a variable is
 875     * declared before it is dereferenced.
 876     */
 877    if (ir->name && ir->is_name_ralloced())
 878       assert(ralloc_parent(ir->name) == ir);
 879
 880    _mesa_set_add(ir_set, ir);
 881
 882    /* If a variable is an array, verify that the maximum array index is in
 883     * bounds.  There was once an error in AST-to-HIR conversion that set this
 884     * to be out of bounds.
 885     */
 886    if (ir->type->array_size() > 0) {
 887       if (ir->data.max_array_access >= (int)ir->type->length) {
 888          printf("ir_variable has maximum access out of bounds (%d vs %d)\n",
 889                 ir->data.max_array_access, ir->type->length - 1);
 890          ir->print();
 891          abort();
 892       }
 893    }
 894
 895    /* If a variable is an interface block (or an array of interface blocks),
 896     * verify that the maximum array index for each interface member is in
 897     * bounds.
 898     */
 899    if (ir->is_interface_instance()) {
 900       const glsl_struct_field *fields =
 901          ir->get_interface_type()->fields.structure;
 902       for (unsigned i = 0; i < ir->get_interface_type()->length; i++) {
 903          if (fields[i].type->array_size() > 0 &&
 904              !fields[i].implicit_sized_array) {
 905             const int *const max_ifc_array_access =
 906                ir->get_max_ifc_array_access();
 907
 908             assert(max_ifc_array_access != NULL);
 909
 910             if (max_ifc_array_access[i] >= (int)fields[i].type->length) {
 911                printf("ir_variable has maximum access out of bounds for "
 912                       "field %s (%d vs %d)\n", fields[i].name,
 913                       max_ifc_array_access[i], fields[i].type->length);
 914                ir->print();
 915                abort();
 916             }
 917          }
 918       }
 919    }
 920
 921    if (ir->constant_initializer != NULL && !ir->data.has_initializer) {
 922       printf("ir_variable didn't have an initializer, but has a constant "
 923              "initializer value.\n");
 924       ir->print();
 925       abort();
 926    }
 927
 928    if (ir->data.mode == ir_var_uniform
 929        && is_gl_identifier(ir->name)
 930        && ir->get_state_slots() == NULL) {
 931       printf("built-in uniform has no state\n");
 932       ir->print();
 933       abort();
 934    }
 935
 936    return visit_continue;
 937 }
 938
 939 ir_visitor_status
 940 ir_validate::visit_enter(ir_assignment *ir)
 941 {
 942    const ir_dereference *const lhs = ir->lhs;
 943    if (lhs->type->is_scalar() || lhs->type->is_vector()) {
 944       if (ir->write_mask == 0) {
 945          printf("Assignment LHS is %s, but write mask is 0:\n",
 946                 lhs->type->is_scalar() ? "scalar" : "vector");
 947          ir->print();
 948          abort();
 949       }
 950
 951       int lhs_components = 0;
 952       for (int i = 0; i < 4; i++) {
 953          if (ir->write_mask & (1 << i))
 954             lhs_components++;
 955       }
 956
 957       if (lhs_components != ir->rhs->type->vector_elements) {
 958          printf("Assignment count of LHS write mask channels enabled not\n"
 959                 "matching RHS vector size (%d LHS, %d RHS).\n",
 960                 lhs_components, ir->rhs->type->vector_elements);
 961          ir->print();
 962          abort();
 963       }
 964    }
 965
 966    this->validate_ir(ir, this->data_enter);
 967
 968    return visit_continue;
 969 }
 970
 971 ir_visitor_status
 972 ir_validate::visit_enter(ir_call *ir)
 973 {
 974    ir_function_signature *const callee = ir->callee;
 975
 976    if (callee->ir_type != ir_type_function_signature) {
 977       printf("IR called by ir_call is not ir_function_signature!\n");
 978       abort();
 979    }
 980
 981    if (ir->return_deref) {
 982       if (ir->return_deref->type != callee->return_type) {
 983          printf("callee type %s does not match return storage type %s\n",
 984                 callee->return_type->name, ir->return_deref->type->name);
 985          abort();
 986       }
 987    } else if (callee->return_type != glsl_type::void_type) {
 988       printf("ir_call has non-void callee but no return storage\n");
 989       abort();
 990    }
 991
 992    const exec_node *formal_param_node = callee->parameters.get_head_raw();
 993    const exec_node *actual_param_node = ir->actual_parameters.get_head_raw();
 994    while (true) {
 995       if (formal_param_node->is_tail_sentinel()
 996           != actual_param_node->is_tail_sentinel()) {
 997          printf("ir_call has the wrong number of parameters:\n");
 998          goto dump_ir;
 999       }
1000       if (formal_param_node->is_tail_sentinel()) {
1001          break;
1002       }
1003       const ir_variable *formal_param
1004          = (const ir_variable *) formal_param_node;
1005       const ir_rvalue *actual_param
1006          = (const ir_rvalue *) actual_param_node;
1007       if (formal_param->type != actual_param->type) {
1008          printf("ir_call parameter type mismatch:\n");
1009          goto dump_ir;
1010       }
1011       if (formal_param->data.mode == ir_var_function_out
1012           || formal_param->data.mode == ir_var_function_inout) {
1013          if (!actual_param->is_lvalue()) {
1014             printf("ir_call out/inout parameters must be lvalues:\n");
1015             goto dump_ir;
1016          }
1017       }
1018       formal_param_node = formal_param_node->next;
1019       actual_param_node = actual_param_node->next;
1020    }
1021
1022    return visit_continue;
1023
1024 dump_ir:
1025    ir->print();
1026    printf("callee:\n");
1027    callee->print();
1028    abort();
1029    return visit_stop;
1030 }
1031
1032 void
1033 ir_validate::validate_ir(ir_instruction *ir, void *data)
1034 {
1035    struct set *ir_set = (struct set *) data;
1036
1037    if (_mesa_set_search(ir_set, ir)) {
1038       printf("Instruction node present twice in ir tree:\n");
1039       ir->print();
1040       printf("\n");
1041       abort();
1042    }
1043    _mesa_set_add(ir_set, ir);
1044 }
1045
1046 #ifdef DEBUG
1047 static void
1048 check_node_type(ir_instruction *ir, void *data)
1049 {
1050    (void) data;
1051
1052    if (ir->ir_type >= ir_type_max) {
1053       printf("Instruction node with unset type\n");
1054       ir->print(); printf("\n");
1055    }
1056    ir_rvalue *value = ir->as_rvalue();
1057    if (value != NULL)
1058       assert(value->type != glsl_type::error_type);
1059 }
1060 #endif
1061
1062 void
1063 validate_ir_tree(exec_list *instructions)
1064 {
1065    /* We shouldn't have any reason to validate IR in a release build,
1066     * and it's half composed of assert()s anyway which wouldn't do
1067     * anything.
1068     */
1069 #ifdef DEBUG
1070    ir_validate v;
1071
1072    v.run(instructions);
1073
1074    foreach_in_list(ir_instruction, ir, instructions) {
1075       visit_tree(ir, check_node_type, NULL);
1076    }
1077 #endif
1078 }