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 "util/hash_table.h"
  39 #include "util/set.h"
  40 #include "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       printf("ir_dereference_array @ %p does not specify an array or a "
 115              "matrix\n",
 116              (void *) ir);
 117       ir->print();
 118       printf("\n");
 119       abort();
 120    }
 121
 122    if (!ir->array_index->type->is_scalar()) {
 123       printf("ir_dereference_array @ %p does not have scalar index: %s\n",
 124              (void *) ir, ir->array_index->type->name);
 125       abort();
 126    }
 127
 128    if (!ir->array_index->type->is_integer()) {
 129       printf("ir_dereference_array @ %p does not have integer index: %s\n",
 130              (void *) ir, ir->array_index->type->name);
 131       abort();
 132    }
 133
 134    return visit_continue;
 135 }
 136
 137 ir_visitor_status
 138 ir_validate::visit_enter(ir_discard *ir)
 139 {
 140    if (ir->condition && ir->condition->type != glsl_type::bool_type) {
 141       printf("ir_discard condition %s type instead of bool.\n",
 142              ir->condition->type->name);
 143       ir->print();
 144       printf("\n");
 145       abort();
 146    }
 147
 148    return visit_continue;
 149 }
 150
 151 ir_visitor_status
 152 ir_validate::visit_enter(ir_if *ir)
 153 {
 154    if (ir->condition->type != glsl_type::bool_type) {
 155       printf("ir_if condition %s type instead of bool.\n",
 156              ir->condition->type->name);
 157       ir->print();
 158       printf("\n");
 159       abort();
 160    }
 161
 162    return visit_continue;
 163 }
 164
 165
 166 ir_visitor_status
 167 ir_validate::visit_enter(ir_function *ir)
 168 {
 169    /* Function definitions cannot be nested.
 170     */
 171    if (this->current_function != NULL) {
 172       printf("Function definition nested inside another function "
 173              "definition:\n");
 174       printf("%s %p inside %s %p\n",
 175              ir->name, (void *) ir,
 176              this->current_function->name, (void *) this->current_function);
 177       abort();
 178    }
 179
 180    /* Store the current function hierarchy being traversed.  This is used
 181     * by the function signature visitor to ensure that the signatures are
 182     * linked with the correct functions.
 183     */
 184    this->current_function = ir;
 185
 186    this->validate_ir(ir, this->data_enter);
 187
 188    /* Verify that all of the things stored in the list of signatures are,
 189     * in fact, function signatures.
 190     */
 191    foreach_in_list(ir_instruction, sig, &ir->signatures) {
 192       if (sig->ir_type != ir_type_function_signature) {
 193          printf("Non-signature in signature list of function `%s'\n",
 194                 ir->name);
 195          abort();
 196       }
 197    }
 198
 199    return visit_continue;
 200 }
 201
 202 ir_visitor_status
 203 ir_validate::visit_leave(ir_function *ir)
 204 {
 205    assert(ralloc_parent(ir->name) == ir);
 206
 207    this->current_function = NULL;
 208    return visit_continue;
 209 }
 210
 211 ir_visitor_status
 212 ir_validate::visit_enter(ir_function_signature *ir)
 213 {
 214    if (this->current_function != ir->function()) {
 215       printf("Function signature nested inside wrong function "
 216              "definition:\n");
 217       printf("%p inside %s %p instead of %s %p\n",
 218              (void *) ir,
 219              this->current_function->name, (void *) this->current_function,
 220              ir->function_name(), (void *) ir->function());
 221       abort();
 222    }
 223
 224    if (ir->return_type == NULL) {
 225       printf("Function signature %p for function %s has NULL return type.\n",
 226              (void *) ir, ir->function_name());
 227       abort();
 228    }
 229
 230    this->validate_ir(ir, this->data_enter);
 231
 232    return visit_continue;
 233 }
 234
 235 ir_visitor_status
 236 ir_validate::visit_leave(ir_expression *ir)
 237 {
 238    switch (ir->operation) {
 239    case ir_unop_bit_not:
 240       assert(ir->operands[0]->type == ir->type);
 241       break;
 242    case ir_unop_logic_not:
 243       assert(ir->type->base_type == GLSL_TYPE_BOOL);
 244       assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
 245       break;
 246
 247    case ir_unop_neg:
 248    case ir_unop_abs:
 249    case ir_unop_sign:
 250    case ir_unop_rcp:
 251    case ir_unop_rsq:
 252    case ir_unop_sqrt:
 253       assert(ir->type == ir->operands[0]->type);
 254       break;
 255
 256    case ir_unop_exp:
 257    case ir_unop_log:
 258    case ir_unop_exp2:
 259    case ir_unop_log2:
 260    case ir_unop_saturate:
 261       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 262       assert(ir->type == ir->operands[0]->type);
 263       break;
 264
 265    case ir_unop_f2i:
 266       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 267       assert(ir->type->base_type == GLSL_TYPE_INT);
 268       break;
 269    case ir_unop_f2u:
 270       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 271       assert(ir->type->base_type == GLSL_TYPE_UINT);
 272       break;
 273    case ir_unop_i2f:
 274       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 275       assert(ir->type->base_type == GLSL_TYPE_FLOAT);
 276       break;
 277    case ir_unop_f2b:
 278       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 279       assert(ir->type->base_type == GLSL_TYPE_BOOL);
 280       break;
 281    case ir_unop_b2f:
 282       assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
 283       assert(ir->type->base_type == GLSL_TYPE_FLOAT);
 284       break;
 285    case ir_unop_i2b:
 286       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 287       assert(ir->type->base_type == GLSL_TYPE_BOOL);
 288       break;
 289    case ir_unop_b2i:
 290       assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
 291       assert(ir->type->base_type == GLSL_TYPE_INT);
 292       break;
 293    case ir_unop_u2f:
 294       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 295       assert(ir->type->base_type == GLSL_TYPE_FLOAT);
 296       break;
 297    case ir_unop_i2u:
 298       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 299       assert(ir->type->base_type == GLSL_TYPE_UINT);
 300       break;
 301    case ir_unop_u2i:
 302       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 303       assert(ir->type->base_type == GLSL_TYPE_INT);
 304       break;
 305    case ir_unop_bitcast_i2f:
 306       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 307       assert(ir->type->base_type == GLSL_TYPE_FLOAT);
 308       break;
 309    case ir_unop_bitcast_f2i:
 310       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 311       assert(ir->type->base_type == GLSL_TYPE_INT);
 312       break;
 313    case ir_unop_bitcast_u2f:
 314       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 315       assert(ir->type->base_type == GLSL_TYPE_FLOAT);
 316       break;
 317    case ir_unop_bitcast_f2u:
 318       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 319       assert(ir->type->base_type == GLSL_TYPE_UINT);
 320       break;
 321
 322    case ir_unop_any:
 323       assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
 324       assert(ir->type == glsl_type::bool_type);
 325       break;
 326
 327    case ir_unop_trunc:
 328    case ir_unop_round_even:
 329    case ir_unop_ceil:
 330    case ir_unop_floor:
 331    case ir_unop_fract:
 332       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT ||
 333              ir->operands[0]->type->base_type == GLSL_TYPE_DOUBLE);
 334       assert(ir->operands[0]->type == ir->type);
 335       break;
 336    case ir_unop_sin:
 337    case ir_unop_cos:
 338    case ir_unop_dFdx:
 339    case ir_unop_dFdx_coarse:
 340    case ir_unop_dFdx_fine:
 341    case ir_unop_dFdy:
 342    case ir_unop_dFdy_coarse:
 343    case ir_unop_dFdy_fine:
 344       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 345       assert(ir->operands[0]->type == ir->type);
 346       break;
 347
 348    case ir_unop_pack_snorm_2x16:
 349    case ir_unop_pack_unorm_2x16:
 350    case ir_unop_pack_half_2x16:
 351       assert(ir->type == glsl_type::uint_type);
 352       assert(ir->operands[0]->type == glsl_type::vec2_type);
 353       break;
 354
 355    case ir_unop_pack_snorm_4x8:
 356    case ir_unop_pack_unorm_4x8:
 357       assert(ir->type == glsl_type::uint_type);
 358       assert(ir->operands[0]->type == glsl_type::vec4_type);
 359       break;
 360
 361    case ir_unop_pack_double_2x32:
 362       assert(ir->type == glsl_type::double_type);
 363       assert(ir->operands[0]->type == glsl_type::uvec2_type);
 364       break;
 365
 366    case ir_unop_unpack_snorm_2x16:
 367    case ir_unop_unpack_unorm_2x16:
 368    case ir_unop_unpack_half_2x16:
 369       assert(ir->type == glsl_type::vec2_type);
 370       assert(ir->operands[0]->type == glsl_type::uint_type);
 371       break;
 372
 373    case ir_unop_unpack_snorm_4x8:
 374    case ir_unop_unpack_unorm_4x8:
 375       assert(ir->type == glsl_type::vec4_type);
 376       assert(ir->operands[0]->type == glsl_type::uint_type);
 377       break;
 378
 379    case ir_unop_unpack_half_2x16_split_x:
 380    case ir_unop_unpack_half_2x16_split_y:
 381       assert(ir->type == glsl_type::float_type);
 382       assert(ir->operands[0]->type == glsl_type::uint_type);
 383       break;
 384
 385    case ir_unop_unpack_double_2x32:
 386       assert(ir->type == glsl_type::uvec2_type);
 387       assert(ir->operands[0]->type == glsl_type::double_type);
 388       break;
 389
 390    case ir_unop_bitfield_reverse:
 391       assert(ir->operands[0]->type == ir->type);
 392       assert(ir->type->is_integer());
 393       break;
 394
 395    case ir_unop_bit_count:
 396    case ir_unop_find_msb:
 397    case ir_unop_find_lsb:
 398       assert(ir->operands[0]->type->vector_elements == ir->type->vector_elements);
 399       assert(ir->operands[0]->type->is_integer());
 400       assert(ir->type->base_type == GLSL_TYPE_INT);
 401       break;
 402
 403    case ir_unop_noise:
 404       /* XXX what can we assert here? */
 405       break;
 406
 407    case ir_unop_interpolate_at_centroid:
 408       assert(ir->operands[0]->type == ir->type);
 409       assert(ir->operands[0]->type->is_float());
 410       break;
 411
 412    case ir_unop_get_buffer_size:
 413       assert(ir->type == glsl_type::int_type);
 414       assert(ir->operands[0]->type == glsl_type::uint_type);
 415       break;
 416
 417    case ir_unop_ssbo_unsized_array_length:
 418       assert(ir->type == glsl_type::int_type);
 419       assert(ir->operands[0]->type->is_array());
 420       assert(ir->operands[0]->type->is_unsized_array());
 421       break;
 422
 423    case ir_unop_d2f:
 424       assert(ir->operands[0]->type->base_type == GLSL_TYPE_DOUBLE);
 425       assert(ir->type->base_type == GLSL_TYPE_FLOAT);
 426       break;
 427    case ir_unop_f2d:
 428       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
 429       assert(ir->type->base_type == GLSL_TYPE_DOUBLE);
 430       break;
 431    case ir_unop_d2i:
 432       assert(ir->operands[0]->type->base_type == GLSL_TYPE_DOUBLE);
 433       assert(ir->type->base_type == GLSL_TYPE_INT);
 434       break;
 435    case ir_unop_i2d:
 436       assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
 437       assert(ir->type->base_type == GLSL_TYPE_DOUBLE);
 438       break;
 439    case ir_unop_d2u:
 440       assert(ir->operands[0]->type->base_type == GLSL_TYPE_DOUBLE);
 441       assert(ir->type->base_type == GLSL_TYPE_UINT);
 442       break;
 443    case ir_unop_u2d:
 444       assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
 445       assert(ir->type->base_type == GLSL_TYPE_DOUBLE);
 446       break;
 447    case ir_unop_d2b:
 448       assert(ir->operands[0]->type->base_type == GLSL_TYPE_DOUBLE);
 449       assert(ir->type->base_type == GLSL_TYPE_BOOL);
 450       break;
 451
 452    case ir_unop_frexp_sig:
 453       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT ||
 454              ir->operands[0]->type->base_type == GLSL_TYPE_DOUBLE);
 455       assert(ir->type->base_type == GLSL_TYPE_DOUBLE);
 456       break;
 457    case ir_unop_frexp_exp:
 458       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT ||
 459              ir->operands[0]->type->base_type == GLSL_TYPE_DOUBLE);
 460       assert(ir->type->base_type == GLSL_TYPE_INT);
 461       break;
 462    case ir_unop_subroutine_to_int:
 463       assert(ir->operands[0]->type->base_type == GLSL_TYPE_SUBROUTINE);
 464       assert(ir->type->base_type == GLSL_TYPE_INT);
 465       break;
 466    case ir_binop_add:
 467    case ir_binop_sub:
 468    case ir_binop_mul:
 469    case ir_binop_div:
 470    case ir_binop_mod:
 471    case ir_binop_min:
 472    case ir_binop_max:
 473    case ir_binop_pow:
 474       assert(ir->operands[0]->type->base_type ==
 475              ir->operands[1]->type->base_type);
 476
 477       if (ir->operands[0]->type->is_scalar())
 478          assert(ir->operands[1]->type == ir->type);
 479       else if (ir->operands[1]->type->is_scalar())
 480          assert(ir->operands[0]->type == ir->type);
 481       else if (ir->operands[0]->type->is_vector() &&
 482                ir->operands[1]->type->is_vector()) {
 483          assert(ir->operands[0]->type == ir->operands[1]->type);
 484          assert(ir->operands[0]->type == ir->type);
 485       }
 486       break;
 487
 488    case ir_binop_imul_high:
 489       assert(ir->type == ir->operands[0]->type);
 490       assert(ir->type == ir->operands[1]->type);
 491       assert(ir->type->is_integer());
 492       break;
 493
 494    case ir_binop_carry:
 495    case ir_binop_borrow:
 496       assert(ir->type == ir->operands[0]->type);
 497       assert(ir->type == ir->operands[1]->type);
 498       assert(ir->type->base_type == GLSL_TYPE_UINT);
 499       break;
 500
 501    case ir_binop_less:
 502    case ir_binop_greater:
 503    case ir_binop_lequal:
 504    case ir_binop_gequal:
 505    case ir_binop_equal:
 506    case ir_binop_nequal:
 507       /* The semantics of the IR operators differ from the GLSL <, >, <=, >=,
 508        * ==, and != operators.  The IR operators perform a component-wise
 509        * comparison on scalar or vector types and return a boolean scalar or
 510        * vector type of the same size.
 511        */
 512       assert(ir->type->base_type == GLSL_TYPE_BOOL);
 513       assert(ir->operands[0]->type == ir->operands[1]->type);
 514       assert(ir->operands[0]->type->is_vector()
 515              || ir->operands[0]->type->is_scalar());
 516       assert(ir->operands[0]->type->vector_elements
 517              == ir->type->vector_elements);
 518       break;
 519
 520    case ir_binop_all_equal:
 521    case ir_binop_any_nequal:
 522       /* GLSL == and != operate on scalars, vectors, matrices and arrays, and
 523        * return a scalar boolean.  The IR matches that.
 524        */
 525       assert(ir->type == glsl_type::bool_type);
 526       assert(ir->operands[0]->type == ir->operands[1]->type);
 527       break;
 528
 529    case ir_binop_lshift:
 530    case ir_binop_rshift:
 531       assert(ir->operands[0]->type->is_integer() &&
 532              ir->operands[1]->type->is_integer());
 533       if (ir->operands[0]->type->is_scalar()) {
 534           assert(ir->operands[1]->type->is_scalar());
 535       }
 536       if (ir->operands[0]->type->is_vector() &&
 537           ir->operands[1]->type->is_vector()) {
 538           assert(ir->operands[0]->type->components() ==
 539                  ir->operands[1]->type->components());
 540       }
 541       assert(ir->type == ir->operands[0]->type);
 542       break;
 543
 544    case ir_binop_bit_and:
 545    case ir_binop_bit_xor:
 546    case ir_binop_bit_or:
 547        assert(ir->operands[0]->type->base_type ==
 548               ir->operands[1]->type->base_type);
 549        assert(ir->type->is_integer());
 550        if (ir->operands[0]->type->is_vector() &&
 551            ir->operands[1]->type->is_vector()) {
 552            assert(ir->operands[0]->type->vector_elements ==
 553                   ir->operands[1]->type->vector_elements);
 554        }
 555        break;
 556
 557    case ir_binop_logic_and:
 558    case ir_binop_logic_xor:
 559    case ir_binop_logic_or:
 560       assert(ir->type->base_type == GLSL_TYPE_BOOL);
 561       assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
 562       assert(ir->operands[1]->type->base_type == GLSL_TYPE_BOOL);
 563       break;
 564
 565    case ir_binop_dot:
 566       assert(ir->type == glsl_type::float_type ||
 567              ir->type == glsl_type::double_type);
 568       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT ||
 569              ir->operands[0]->type->base_type == GLSL_TYPE_DOUBLE);
 570       assert(ir->operands[0]->type->is_vector());
 571       assert(ir->operands[0]->type == ir->operands[1]->type);
 572       break;
 573
 574    case ir_binop_pack_half_2x16_split:
 575       assert(ir->type == glsl_type::uint_type);
 576       assert(ir->operands[0]->type == glsl_type::float_type);
 577       assert(ir->operands[1]->type == glsl_type::float_type);
 578       break;
 579
 580    case ir_binop_bfm:
 581       assert(ir->type->is_integer());
 582       assert(ir->operands[0]->type->is_integer());
 583       assert(ir->operands[1]->type->is_integer());
 584       break;
 585
 586    case ir_binop_ubo_load:
 587       assert(ir->operands[0]->type == glsl_type::uint_type);
 588
 589       assert(ir->operands[1]->type == glsl_type::uint_type);
 590       break;
 591
 592    case ir_binop_ldexp:
 593       assert(ir->operands[0]->type == ir->type);
 594       assert(ir->operands[0]->type->is_float() ||
 595              ir->operands[0]->type->is_double());
 596       assert(ir->operands[1]->type->base_type == GLSL_TYPE_INT);
 597       assert(ir->operands[0]->type->components() ==
 598              ir->operands[1]->type->components());
 599       break;
 600
 601    case ir_binop_vector_extract:
 602       assert(ir->operands[0]->type->is_vector());
 603       assert(ir->operands[1]->type->is_scalar()
 604              && ir->operands[1]->type->is_integer());
 605       break;
 606
 607    case ir_binop_interpolate_at_offset:
 608       assert(ir->operands[0]->type == ir->type);
 609       assert(ir->operands[0]->type->is_float());
 610       assert(ir->operands[1]->type->components() == 2);
 611       assert(ir->operands[1]->type->is_float());
 612       break;
 613
 614    case ir_binop_interpolate_at_sample:
 615       assert(ir->operands[0]->type == ir->type);
 616       assert(ir->operands[0]->type->is_float());
 617       assert(ir->operands[1]->type == glsl_type::int_type);
 618       break;
 619
 620    case ir_triop_fma:
 621       assert(ir->type->base_type == GLSL_TYPE_FLOAT ||
 622              ir->type->base_type == GLSL_TYPE_DOUBLE);
 623       assert(ir->type == ir->operands[0]->type);
 624       assert(ir->type == ir->operands[1]->type);
 625       assert(ir->type == ir->operands[2]->type);
 626       break;
 627
 628    case ir_triop_lrp:
 629       assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT ||
 630              ir->operands[0]->type->base_type == GLSL_TYPE_DOUBLE);
 631       assert(ir->operands[0]->type == ir->operands[1]->type);
 632       assert(ir->operands[2]->type == ir->operands[0]->type ||
 633              ir->operands[2]->type == glsl_type::float_type ||
 634              ir->operands[2]->type == glsl_type::double_type);
 635       break;
 636
 637    case ir_triop_csel:
 638       assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
 639       assert(ir->type->vector_elements == ir->operands[0]->type->vector_elements);
 640       assert(ir->type == ir->operands[1]->type);
 641       assert(ir->type == ir->operands[2]->type);
 642       break;
 643
 644    case ir_triop_bfi:
 645       assert(ir->operands[0]->type->is_integer());
 646       assert(ir->operands[1]->type == ir->operands[2]->type);
 647       assert(ir->operands[1]->type == ir->type);
 648       break;
 649
 650    case ir_triop_bitfield_extract:
 651       assert(ir->operands[0]->type == ir->type);
 652       assert(ir->operands[1]->type == glsl_type::int_type);
 653       assert(ir->operands[2]->type == glsl_type::int_type);
 654       break;
 655
 656    case ir_triop_vector_insert:
 657       assert(ir->operands[0]->type->is_vector());
 658       assert(ir->operands[1]->type->is_scalar());
 659       assert(ir->operands[0]->type->base_type == ir->operands[1]->type->base_type);
 660       assert(ir->operands[2]->type->is_scalar()
 661              && ir->operands[2]->type->is_integer());
 662       assert(ir->type == ir->operands[0]->type);
 663       break;
 664
 665    case ir_quadop_bitfield_insert:
 666       assert(ir->operands[0]->type == ir->type);
 667       assert(ir->operands[1]->type == ir->type);
 668       assert(ir->operands[2]->type == glsl_type::int_type);
 669       assert(ir->operands[3]->type == glsl_type::int_type);
 670       break;
 671
 672    case ir_quadop_vector:
 673       /* The vector operator collects some number of scalars and generates a
 674        * vector from them.
 675        *
 676        *  - All of the operands must be scalar.
 677        *  - Number of operands must matche the size of the resulting vector.
 678        *  - Base type of the operands must match the base type of the result.
 679        */
 680       assert(ir->type->is_vector());
 681       switch (ir->type->vector_elements) {
 682       case 2:
 683          assert(ir->operands[0]->type->is_scalar());
 684          assert(ir->operands[0]->type->base_type == ir->type->base_type);
 685          assert(ir->operands[1]->type->is_scalar());
 686          assert(ir->operands[1]->type->base_type == ir->type->base_type);
 687          assert(ir->operands[2] == NULL);
 688          assert(ir->operands[3] == NULL);
 689          break;
 690       case 3:
 691          assert(ir->operands[0]->type->is_scalar());
 692          assert(ir->operands[0]->type->base_type == ir->type->base_type);
 693          assert(ir->operands[1]->type->is_scalar());
 694          assert(ir->operands[1]->type->base_type == ir->type->base_type);
 695          assert(ir->operands[2]->type->is_scalar());
 696          assert(ir->operands[2]->type->base_type == ir->type->base_type);
 697          assert(ir->operands[3] == NULL);
 698          break;
 699       case 4:
 700          assert(ir->operands[0]->type->is_scalar());
 701          assert(ir->operands[0]->type->base_type == ir->type->base_type);
 702          assert(ir->operands[1]->type->is_scalar());
 703          assert(ir->operands[1]->type->base_type == ir->type->base_type);
 704          assert(ir->operands[2]->type->is_scalar());
 705          assert(ir->operands[2]->type->base_type == ir->type->base_type);
 706          assert(ir->operands[3]->type->is_scalar());
 707          assert(ir->operands[3]->type->base_type == ir->type->base_type);
 708          break;
 709       default:
 710          /* The is_vector assertion above should prevent execution from ever
 711           * getting here.
 712           */
 713          assert(!"Should not get here.");
 714          break;
 715       }
 716    }
 717
 718    return visit_continue;
 719 }
 720
 721 ir_visitor_status
 722 ir_validate::visit_leave(ir_swizzle *ir)
 723 {
 724    unsigned int chans[4] = {ir->mask.x, ir->mask.y, ir->mask.z, ir->mask.w};
 725
 726    for (unsigned int i = 0; i < ir->type->vector_elements; i++) {
 727       if (chans[i] >= ir->val->type->vector_elements) {
 728          printf("ir_swizzle @ %p specifies a channel not present "
 729                 "in the value.\n", (void *) ir);
 730          ir->print();
 731          abort();
 732       }
 733    }
 734
 735    return visit_continue;
 736 }
 737
 738 ir_visitor_status
 739 ir_validate::visit(ir_variable *ir)
 740 {
 741    /* An ir_variable is the one thing that can (and will) appear multiple times
 742     * in an IR tree.  It is added to the hashtable so that it can be used
 743     * in the ir_dereference_variable handler to ensure that a variable is
 744     * declared before it is dereferenced.
 745     */
 746    if (ir->name && ir->is_name_ralloced())
 747       assert(ralloc_parent(ir->name) == ir);
 748
 749    _mesa_set_add(ir_set, ir);
 750
 751    /* If a variable is an array, verify that the maximum array index is in
 752     * bounds.  There was once an error in AST-to-HIR conversion that set this
 753     * to be out of bounds.
 754     */
 755    if (ir->type->array_size() > 0) {
 756       if (ir->data.max_array_access >= ir->type->length) {
 757          printf("ir_variable has maximum access out of bounds (%d vs %d)\n",
 758                 ir->data.max_array_access, ir->type->length - 1);
 759          ir->print();
 760          abort();
 761       }
 762    }
 763
 764    /* If a variable is an interface block (or an array of interface blocks),
 765     * verify that the maximum array index for each interface member is in
 766     * bounds.
 767     */
 768    if (ir->is_interface_instance()) {
 769       const glsl_struct_field *fields =
 770          ir->get_interface_type()->fields.structure;
 771       for (unsigned i = 0; i < ir->get_interface_type()->length; i++) {
 772          if (fields[i].type->array_size() > 0) {
 773             const unsigned *const max_ifc_array_access =
 774                ir->get_max_ifc_array_access();
 775
 776             assert(max_ifc_array_access != NULL);
 777
 778             if (max_ifc_array_access[i] >= fields[i].type->length) {
 779                printf("ir_variable has maximum access out of bounds for "
 780                       "field %s (%d vs %d)\n", fields[i].name,
 781                       max_ifc_array_access[i], fields[i].type->length);
 782                ir->print();
 783                abort();
 784             }
 785          }
 786       }
 787    }
 788
 789    if (ir->constant_initializer != NULL && !ir->data.has_initializer) {
 790       printf("ir_variable didn't have an initializer, but has a constant "
 791              "initializer value.\n");
 792       ir->print();
 793       abort();
 794    }
 795
 796    if (ir->data.mode == ir_var_uniform
 797        && is_gl_identifier(ir->name)
 798        && ir->get_state_slots() == NULL) {
 799       printf("built-in uniform has no state\n");
 800       ir->print();
 801       abort();
 802    }
 803
 804    return visit_continue;
 805 }
 806
 807 ir_visitor_status
 808 ir_validate::visit_enter(ir_assignment *ir)
 809 {
 810    const ir_dereference *const lhs = ir->lhs;
 811    if (lhs->type->is_scalar() || lhs->type->is_vector()) {
 812       if (ir->write_mask == 0) {
 813          printf("Assignment LHS is %s, but write mask is 0:\n",
 814                 lhs->type->is_scalar() ? "scalar" : "vector");
 815          ir->print();
 816          abort();
 817       }
 818
 819       int lhs_components = 0;
 820       for (int i = 0; i < 4; i++) {
 821          if (ir->write_mask & (1 << i))
 822             lhs_components++;
 823       }
 824
 825       if (lhs_components != ir->rhs->type->vector_elements) {
 826          printf("Assignment count of LHS write mask channels enabled not\n"
 827                 "matching RHS vector size (%d LHS, %d RHS).\n",
 828                 lhs_components, ir->rhs->type->vector_elements);
 829          ir->print();
 830          abort();
 831       }
 832    }
 833
 834    this->validate_ir(ir, this->data_enter);
 835
 836    return visit_continue;
 837 }
 838
 839 ir_visitor_status
 840 ir_validate::visit_enter(ir_call *ir)
 841 {
 842    ir_function_signature *const callee = ir->callee;
 843
 844    if (callee->ir_type != ir_type_function_signature) {
 845       printf("IR called by ir_call is not ir_function_signature!\n");
 846       abort();
 847    }
 848
 849    if (ir->return_deref) {
 850       if (ir->return_deref->type != callee->return_type) {
 851          printf("callee type %s does not match return storage type %s\n",
 852                 callee->return_type->name, ir->return_deref->type->name);
 853          abort();
 854       }
 855    } else if (callee->return_type != glsl_type::void_type) {
 856       printf("ir_call has non-void callee but no return storage\n");
 857       abort();
 858    }
 859
 860    const exec_node *formal_param_node = callee->parameters.head;
 861    const exec_node *actual_param_node = ir->actual_parameters.head;
 862    while (true) {
 863       if (formal_param_node->is_tail_sentinel()
 864           != actual_param_node->is_tail_sentinel()) {
 865          printf("ir_call has the wrong number of parameters:\n");
 866          goto dump_ir;
 867       }
 868       if (formal_param_node->is_tail_sentinel()) {
 869          break;
 870       }
 871       const ir_variable *formal_param
 872          = (const ir_variable *) formal_param_node;
 873       const ir_rvalue *actual_param
 874          = (const ir_rvalue *) actual_param_node;
 875       if (formal_param->type != actual_param->type) {
 876          printf("ir_call parameter type mismatch:\n");
 877          goto dump_ir;
 878       }
 879       if (formal_param->data.mode == ir_var_function_out
 880           || formal_param->data.mode == ir_var_function_inout) {
 881          if (!actual_param->is_lvalue()) {
 882             printf("ir_call out/inout parameters must be lvalues:\n");
 883             goto dump_ir;
 884          }
 885       }
 886       formal_param_node = formal_param_node->next;
 887       actual_param_node = actual_param_node->next;
 888    }
 889
 890    return visit_continue;
 891
 892 dump_ir:
 893    ir->print();
 894    printf("callee:\n");
 895    callee->print();
 896    abort();
 897    return visit_stop;
 898 }
 899
 900 void
 901 ir_validate::validate_ir(ir_instruction *ir, void *data)
 902 {
 903    struct set *ir_set = (struct set *) data;
 904
 905    if (_mesa_set_search(ir_set, ir)) {
 906       printf("Instruction node present twice in ir tree:\n");
 907       ir->print();
 908       printf("\n");
 909       abort();
 910    }
 911    _mesa_set_add(ir_set, ir);
 912 }
 913
 914 void
 915 check_node_type(ir_instruction *ir, void *data)
 916 {
 917    (void) data;
 918
 919    if (ir->ir_type >= ir_type_max) {
 920       printf("Instruction node with unset type\n");
 921       ir->print(); printf("\n");
 922    }
 923    ir_rvalue *value = ir->as_rvalue();
 924    if (value != NULL)
 925       assert(value->type != glsl_type::error_type);
 926 }
 927
 928 void
 929 validate_ir_tree(exec_list *instructions)
 930 {
 931    /* We shouldn't have any reason to validate IR in a release build,
 932     * and it's half composed of assert()s anyway which wouldn't do
 933     * anything.
 934     */
 935 #ifdef DEBUG
 936    ir_validate v;
 937
 938    v.run(instructions);
 939
 940    foreach_in_list(ir_instruction, ir, instructions) {
 941       visit_tree(ir, check_node_type, NULL);
 942    }
 943 #endif
 944 }