src/compiler/glsl/ast_type.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 #include "ast.h"
  25
  26 void
  27 ast_type_specifier::print(void) const
  28 {
  29    if (structure) {
  30       structure->print();
  31    } else {
  32       printf("%s ", type_name);
  33    }
  34
  35    if (array_specifier) {
  36       array_specifier->print();
  37    }
  38 }
  39
  40 bool
  41 ast_fully_specified_type::has_qualifiers(_mesa_glsl_parse_state *state) const
  42 {
  43    /* 'subroutine' isnt a real qualifier. */
  44    ast_type_qualifier subroutine_only;
  45    subroutine_only.flags.i = 0;
  46    subroutine_only.flags.q.subroutine = 1;
  47    subroutine_only.flags.q.subroutine_def = 1;
  48    if (state->has_explicit_uniform_location()) {
  49       subroutine_only.flags.q.explicit_index = 1;
  50    }
  51    return (this->qualifier.flags.i & ~subroutine_only.flags.i) != 0;
  52 }
  53
  54 bool ast_type_qualifier::has_interpolation() const
  55 {
  56    return this->flags.q.smooth
  57           || this->flags.q.flat
  58           || this->flags.q.noperspective;
  59 }
  60
  61 bool
  62 ast_type_qualifier::has_layout() const
  63 {
  64    return this->flags.q.origin_upper_left
  65           || this->flags.q.pixel_center_integer
  66           || this->flags.q.depth_any
  67           || this->flags.q.depth_greater
  68           || this->flags.q.depth_less
  69           || this->flags.q.depth_unchanged
  70           || this->flags.q.std140
  71           || this->flags.q.std430
  72           || this->flags.q.shared
  73           || this->flags.q.column_major
  74           || this->flags.q.row_major
  75           || this->flags.q.packed
  76           || this->flags.q.explicit_align
  77           || this->flags.q.explicit_component
  78           || this->flags.q.explicit_location
  79           || this->flags.q.explicit_image_format
  80           || this->flags.q.explicit_index
  81           || this->flags.q.explicit_binding
  82           || this->flags.q.explicit_offset
  83           || this->flags.q.explicit_stream
  84           || this->flags.q.explicit_xfb_buffer
  85           || this->flags.q.explicit_xfb_offset
  86           || this->flags.q.explicit_xfb_stride;
  87 }
  88
  89 bool
  90 ast_type_qualifier::has_storage() const
  91 {
  92    return this->flags.q.constant
  93           || this->flags.q.attribute
  94           || this->flags.q.varying
  95           || this->flags.q.in
  96           || this->flags.q.out
  97           || this->flags.q.uniform
  98           || this->flags.q.buffer
  99           || this->flags.q.shared_storage;
 100 }
 101
 102 bool
 103 ast_type_qualifier::has_auxiliary_storage() const
 104 {
 105    return this->flags.q.centroid
 106           || this->flags.q.sample
 107           || this->flags.q.patch;
 108 }
 109
 110 bool ast_type_qualifier::has_memory() const
 111 {
 112    return this->flags.q.coherent
 113           || this->flags.q._volatile
 114           || this->flags.q.restrict_flag
 115           || this->flags.q.read_only
 116           || this->flags.q.write_only;
 117 }
 118
 119 static bool
 120 validate_prim_type(YYLTYPE *loc,
 121                    _mesa_glsl_parse_state *state,
 122                    const ast_type_qualifier &qualifier,
 123                    const ast_type_qualifier &new_qualifier)
 124 {
 125    /* Input layout qualifiers can be specified multiple
 126     * times in separate declarations, as long as they match.
 127     */
 128    if (qualifier.flags.q.prim_type && new_qualifier.flags.q.prim_type
 129        && qualifier.prim_type != new_qualifier.prim_type) {
 130       _mesa_glsl_error(loc, state,
 131                        "conflicting input primitive %s specified",
 132                        state->stage == MESA_SHADER_GEOMETRY ?
 133                        "type" : "mode");
 134       return false;
 135    }
 136
 137    return true;
 138 }
 139
 140 static bool
 141 validate_vertex_spacing(YYLTYPE *loc,
 142                         _mesa_glsl_parse_state *state,
 143                         const ast_type_qualifier &qualifier,
 144                         const ast_type_qualifier &new_qualifier)
 145 {
 146    if (qualifier.flags.q.vertex_spacing && new_qualifier.flags.q.vertex_spacing
 147        && qualifier.vertex_spacing != new_qualifier.vertex_spacing) {
 148       _mesa_glsl_error(loc, state,
 149                        "conflicting vertex spacing specified");
 150       return false;
 151    }
 152
 153    return true;
 154 }
 155
 156 static bool
 157 validate_ordering(YYLTYPE *loc,
 158                   _mesa_glsl_parse_state *state,
 159                   const ast_type_qualifier &qualifier,
 160                   const ast_type_qualifier &new_qualifier)
 161 {
 162    if (qualifier.flags.q.ordering && new_qualifier.flags.q.ordering
 163        && qualifier.ordering != new_qualifier.ordering) {
 164       _mesa_glsl_error(loc, state,
 165                        "conflicting ordering specified");
 166       return false;
 167    }
 168
 169    return true;
 170 }
 171
 172 static bool
 173 validate_point_mode(YYLTYPE *loc,
 174                     _mesa_glsl_parse_state *state,
 175                     const ast_type_qualifier &qualifier,
 176                     const ast_type_qualifier &new_qualifier)
 177 {
 178    /* Point mode can only be true if the flag is set. */
 179    assert (!qualifier.flags.q.point_mode || !new_qualifier.flags.q.point_mode
 180            || (qualifier.point_mode && new_qualifier.point_mode));
 181
 182    return true;
 183 }
 184
 185 /**
 186  * This function merges duplicate layout identifiers.
 187  *
 188  * It deals with duplicates within a single layout qualifier, among multiple
 189  * layout qualifiers on a single declaration and on several declarations for
 190  * the same variable.
 191  *
 192  * The is_single_layout_merge and is_multiple_layouts_merge parameters are
 193  * used to differentiate among them.
 194  */
 195 bool
 196 ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
 197                                     _mesa_glsl_parse_state *state,
 198                                     const ast_type_qualifier &q,
 199                                     bool is_single_layout_merge,
 200                                     bool is_multiple_layouts_merge)
 201 {
 202    bool r = true;
 203    ast_type_qualifier ubo_mat_mask;
 204    ubo_mat_mask.flags.i = 0;
 205    ubo_mat_mask.flags.q.row_major = 1;
 206    ubo_mat_mask.flags.q.column_major = 1;
 207
 208    ast_type_qualifier ubo_layout_mask;
 209    ubo_layout_mask.flags.i = 0;
 210    ubo_layout_mask.flags.q.std140 = 1;
 211    ubo_layout_mask.flags.q.packed = 1;
 212    ubo_layout_mask.flags.q.shared = 1;
 213    ubo_layout_mask.flags.q.std430 = 1;
 214
 215    ast_type_qualifier ubo_binding_mask;
 216    ubo_binding_mask.flags.i = 0;
 217    ubo_binding_mask.flags.q.explicit_binding = 1;
 218    ubo_binding_mask.flags.q.explicit_offset = 1;
 219
 220    ast_type_qualifier stream_layout_mask;
 221    stream_layout_mask.flags.i = 0;
 222    stream_layout_mask.flags.q.stream = 1;
 223
 224    /* FIXME: We should probably do interface and function param validation
 225     * separately.
 226     */
 227    ast_type_qualifier input_layout_mask;
 228    input_layout_mask.flags.i = 0;
 229    input_layout_mask.flags.q.centroid = 1;
 230    /* Function params can have constant */
 231    input_layout_mask.flags.q.constant = 1;
 232    input_layout_mask.flags.q.explicit_component = 1;
 233    input_layout_mask.flags.q.explicit_location = 1;
 234    input_layout_mask.flags.q.flat = 1;
 235    input_layout_mask.flags.q.in = 1;
 236    input_layout_mask.flags.q.invariant = 1;
 237    input_layout_mask.flags.q.noperspective = 1;
 238    input_layout_mask.flags.q.origin_upper_left = 1;
 239    /* Function params 'inout' will set this */
 240    input_layout_mask.flags.q.out = 1;
 241    input_layout_mask.flags.q.patch = 1;
 242    input_layout_mask.flags.q.pixel_center_integer = 1;
 243    input_layout_mask.flags.q.precise = 1;
 244    input_layout_mask.flags.q.sample = 1;
 245    input_layout_mask.flags.q.smooth = 1;
 246
 247    /* Uniform block layout qualifiers get to overwrite each
 248     * other (rightmost having priority), while all other
 249     * qualifiers currently don't allow duplicates.
 250     */
 251    ast_type_qualifier allowed_duplicates_mask;
 252    allowed_duplicates_mask.flags.i =
 253       ubo_mat_mask.flags.i |
 254       ubo_layout_mask.flags.i |
 255       ubo_binding_mask.flags.i;
 256
 257    /* Geometry shaders can have several layout qualifiers
 258     * assigning different stream values.
 259     */
 260    if (state->stage == MESA_SHADER_GEOMETRY) {
 261       allowed_duplicates_mask.flags.i |=
 262          stream_layout_mask.flags.i;
 263    }
 264
 265    if (is_single_layout_merge && !state->has_enhanced_layouts() &&
 266        (this->flags.i & q.flags.i & ~allowed_duplicates_mask.flags.i) != 0) {
 267       _mesa_glsl_error(loc, state, "duplicate layout qualifiers used");
 268       return false;
 269    }
 270
 271    if (q.flags.q.prim_type) {
 272       r &= validate_prim_type(loc, state, *this, q);
 273       this->flags.q.prim_type = 1;
 274       this->prim_type = q.prim_type;
 275    }
 276
 277    if (q.flags.q.max_vertices) {
 278       if (this->flags.q.max_vertices
 279           && !is_single_layout_merge && !is_multiple_layouts_merge) {
 280          this->max_vertices->merge_qualifier(q.max_vertices);
 281       } else {
 282          this->flags.q.max_vertices = 1;
 283          this->max_vertices = q.max_vertices;
 284       }
 285    }
 286
 287    if (q.flags.q.subroutine_def) {
 288       if (this->flags.q.subroutine_def) {
 289          _mesa_glsl_error(loc, state,
 290                           "conflicting subroutine qualifiers used");
 291       } else {
 292          this->subroutine_list = q.subroutine_list;
 293       }
 294    }
 295
 296    if (q.flags.q.invocations) {
 297       if (this->flags.q.invocations
 298           && !is_single_layout_merge && !is_multiple_layouts_merge) {
 299          this->invocations->merge_qualifier(q.invocations);
 300       } else {
 301          this->flags.q.invocations = 1;
 302          this->invocations = q.invocations;
 303       }
 304    }
 305
 306    if (state->stage == MESA_SHADER_GEOMETRY &&
 307        state->has_explicit_attrib_stream()) {
 308       if (!this->flags.q.explicit_stream) {
 309          if (q.flags.q.stream) {
 310             this->flags.q.stream = 1;
 311             this->stream = q.stream;
 312          } else if (!this->flags.q.stream && this->flags.q.out &&
 313                     !this->flags.q.in) {
 314             /* Assign default global stream value */
 315             this->flags.q.stream = 1;
 316             this->stream = state->out_qualifier->stream;
 317          }
 318       }
 319    }
 320
 321    if (state->has_enhanced_layouts()) {
 322       if (!this->flags.q.explicit_xfb_buffer) {
 323          if (q.flags.q.xfb_buffer) {
 324             this->flags.q.xfb_buffer = 1;
 325             this->xfb_buffer = q.xfb_buffer;
 326          } else if (!this->flags.q.xfb_buffer && this->flags.q.out &&
 327                     !this->flags.q.in) {
 328             /* Assign global xfb_buffer value */
 329             this->flags.q.xfb_buffer = 1;
 330             this->xfb_buffer = state->out_qualifier->xfb_buffer;
 331          }
 332       }
 333
 334       if (q.flags.q.explicit_xfb_stride)
 335          this->xfb_stride = q.xfb_stride;
 336
 337       /* Merge all we xfb_stride qualifiers into the global out */
 338       if (q.flags.q.explicit_xfb_stride || this->flags.q.xfb_stride) {
 339
 340          /* Set xfb_stride flag to 0 to avoid adding duplicates every time
 341           * there is a merge.
 342           */
 343          this->flags.q.xfb_stride = 0;
 344
 345          unsigned buff_idx;
 346          if (process_qualifier_constant(state, loc, "xfb_buffer",
 347                                         this->xfb_buffer, &buff_idx)) {
 348             if (state->out_qualifier->out_xfb_stride[buff_idx]
 349                 && !is_single_layout_merge && !is_multiple_layouts_merge) {
 350                state->out_qualifier->out_xfb_stride[buff_idx]->merge_qualifier(
 351                   new(state->linalloc) ast_layout_expression(*loc, this->xfb_stride));
 352             } else {
 353                state->out_qualifier->out_xfb_stride[buff_idx] =
 354                   new(state->linalloc) ast_layout_expression(*loc, this->xfb_stride);
 355             }
 356          }
 357       }
 358    }
 359
 360    if (q.flags.q.vertices) {
 361       if (this->flags.q.vertices
 362           && !is_single_layout_merge && !is_multiple_layouts_merge) {
 363          this->vertices->merge_qualifier(q.vertices);
 364       } else {
 365          this->flags.q.vertices = 1;
 366          this->vertices = q.vertices;
 367       }
 368    }
 369
 370    if (q.flags.q.vertex_spacing) {
 371       r &= validate_vertex_spacing(loc, state, *this, q);
 372       this->flags.q.vertex_spacing = 1;
 373       this->vertex_spacing = q.vertex_spacing;
 374    }
 375
 376    if (q.flags.q.ordering) {
 377       r &= validate_ordering(loc, state, *this, q);
 378       this->flags.q.ordering = 1;
 379       this->ordering = q.ordering;
 380    }
 381
 382    if (q.flags.q.point_mode) {
 383       r &= validate_point_mode(loc, state, *this, q);
 384       this->flags.q.point_mode = 1;
 385       this->point_mode = q.point_mode;
 386    }
 387
 388    if (q.flags.q.early_fragment_tests)
 389       this->flags.q.early_fragment_tests = true;
 390
 391    if ((q.flags.i & ubo_mat_mask.flags.i) != 0)
 392       this->flags.i &= ~ubo_mat_mask.flags.i;
 393    if ((q.flags.i & ubo_layout_mask.flags.i) != 0)
 394       this->flags.i &= ~ubo_layout_mask.flags.i;
 395
 396    for (int i = 0; i < 3; i++) {
 397       if (q.flags.q.local_size & (1 << i)) {
 398          if (this->local_size[i]
 399              && !is_single_layout_merge && !is_multiple_layouts_merge) {
 400             this->local_size[i]->merge_qualifier(q.local_size[i]);
 401          } else {
 402             this->local_size[i] = q.local_size[i];
 403          }
 404       }
 405    }
 406
 407    if (q.flags.q.local_size_variable)
 408       this->flags.q.local_size_variable = true;
 409
 410    this->flags.i |= q.flags.i;
 411
 412    if (this->flags.q.in &&
 413        (this->flags.i & ~input_layout_mask.flags.i) != 0) {
 414       _mesa_glsl_error(loc, state, "invalid input layout qualifier used");
 415       return false;
 416    }
 417
 418    if (q.flags.q.explicit_align)
 419       this->align = q.align;
 420
 421    if (q.flags.q.explicit_location)
 422       this->location = q.location;
 423
 424    if (q.flags.q.explicit_index)
 425       this->index = q.index;
 426
 427   if (q.flags.q.explicit_component)
 428       this->component = q.component;
 429
 430    if (q.flags.q.explicit_binding)
 431       this->binding = q.binding;
 432
 433    if (q.flags.q.explicit_offset || q.flags.q.explicit_xfb_offset)
 434       this->offset = q.offset;
 435
 436    if (q.precision != ast_precision_none)
 437       this->precision = q.precision;
 438
 439    if (q.flags.q.explicit_image_format) {
 440       this->image_format = q.image_format;
 441       this->image_base_type = q.image_base_type;
 442    }
 443
 444    return r;
 445 }
 446
 447 bool
 448 ast_type_qualifier::validate_out_qualifier(YYLTYPE *loc,
 449                                            _mesa_glsl_parse_state *state)
 450 {
 451    bool r = true;
 452    ast_type_qualifier valid_out_mask;
 453    valid_out_mask.flags.i = 0;
 454
 455    switch (state->stage) {
 456    case MESA_SHADER_GEOMETRY:
 457       if (this->flags.q.prim_type) {
 458          /* Make sure this is a valid output primitive type. */
 459          switch (this->prim_type) {
 460          case GL_POINTS:
 461          case GL_LINE_STRIP:
 462          case GL_TRIANGLE_STRIP:
 463             break;
 464          default:
 465             r = false;
 466             _mesa_glsl_error(loc, state, "invalid geometry shader output "
 467                              "primitive type");
 468             break;
 469          }
 470       }
 471
 472       valid_out_mask.flags.q.stream = 1;
 473       valid_out_mask.flags.q.explicit_stream = 1;
 474       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 475       valid_out_mask.flags.q.xfb_buffer = 1;
 476       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 477       valid_out_mask.flags.q.xfb_stride = 1;
 478       valid_out_mask.flags.q.max_vertices = 1;
 479       valid_out_mask.flags.q.prim_type = 1;
 480       break;
 481    case MESA_SHADER_TESS_CTRL:
 482       valid_out_mask.flags.q.vertices = 1;
 483       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 484       valid_out_mask.flags.q.xfb_buffer = 1;
 485       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 486       valid_out_mask.flags.q.xfb_stride = 1;
 487       break;
 488    case MESA_SHADER_TESS_EVAL:
 489    case MESA_SHADER_VERTEX:
 490       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 491       valid_out_mask.flags.q.xfb_buffer = 1;
 492       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 493       valid_out_mask.flags.q.xfb_stride = 1;
 494       break;
 495    case MESA_SHADER_FRAGMENT:
 496       valid_out_mask.flags.q.blend_support = 1;
 497       break;
 498    default:
 499       r = false;
 500       _mesa_glsl_error(loc, state,
 501                        "out layout qualifiers only valid in "
 502                        "geometry, tessellation, vertex and fragment shaders");
 503    }
 504
 505    /* Generate an error when invalid output layout qualifiers are used. */
 506    if ((this->flags.i & ~valid_out_mask.flags.i) != 0) {
 507       r = false;
 508       _mesa_glsl_error(loc, state, "invalid output layout qualifiers used");
 509    }
 510
 511    return r;
 512 }
 513
 514 bool
 515 ast_type_qualifier::merge_into_out_qualifier(YYLTYPE *loc,
 516                                              _mesa_glsl_parse_state *state,
 517                                              ast_node* &node, bool create_node)
 518 {
 519    const bool r = state->out_qualifier->merge_qualifier(loc, state,
 520                                                         *this, false);
 521
 522    switch (state->stage) {
 523    case MESA_SHADER_GEOMETRY:
 524       /* Allow future assignments of global out's stream id value */
 525       state->out_qualifier->flags.q.explicit_stream = 0;
 526       break;
 527    case MESA_SHADER_TESS_CTRL:
 528       if (create_node)
 529          node = new(state->linalloc) ast_tcs_output_layout(*loc);
 530       break;
 531    default:
 532       break;
 533    }
 534
 535    /* Allow future assignments of global out's */
 536    state->out_qualifier->flags.q.explicit_xfb_buffer = 0;
 537    state->out_qualifier->flags.q.explicit_xfb_stride = 0;
 538
 539    return r;
 540 }
 541
 542 bool
 543 ast_type_qualifier::validate_in_qualifier(YYLTYPE *loc,
 544                                           _mesa_glsl_parse_state *state)
 545 {
 546    bool r = true;
 547    ast_type_qualifier valid_in_mask;
 548    valid_in_mask.flags.i = 0;
 549
 550    switch (state->stage) {
 551    case MESA_SHADER_TESS_EVAL:
 552       if (this->flags.q.prim_type) {
 553          /* Make sure this is a valid input primitive type. */
 554          switch (this->prim_type) {
 555          case GL_TRIANGLES:
 556          case GL_QUADS:
 557          case GL_ISOLINES:
 558             break;
 559          default:
 560             r = false;
 561             _mesa_glsl_error(loc, state,
 562                              "invalid tessellation evaluation "
 563                              "shader input primitive type");
 564             break;
 565          }
 566       }
 567
 568       valid_in_mask.flags.q.prim_type = 1;
 569       valid_in_mask.flags.q.vertex_spacing = 1;
 570       valid_in_mask.flags.q.ordering = 1;
 571       valid_in_mask.flags.q.point_mode = 1;
 572       break;
 573    case MESA_SHADER_GEOMETRY:
 574       if (this->flags.q.prim_type) {
 575          /* Make sure this is a valid input primitive type. */
 576          switch (this->prim_type) {
 577          case GL_POINTS:
 578          case GL_LINES:
 579          case GL_LINES_ADJACENCY:
 580          case GL_TRIANGLES:
 581          case GL_TRIANGLES_ADJACENCY:
 582             break;
 583          default:
 584             r = false;
 585             _mesa_glsl_error(loc, state,
 586                              "invalid geometry shader input primitive type");
 587             break;
 588          }
 589       }
 590
 591       valid_in_mask.flags.q.prim_type = 1;
 592       valid_in_mask.flags.q.invocations = 1;
 593       break;
 594    case MESA_SHADER_FRAGMENT:
 595       valid_in_mask.flags.q.early_fragment_tests = 1;
 596       break;
 597    case MESA_SHADER_COMPUTE:
 598       valid_in_mask.flags.q.local_size = 7;
 599       valid_in_mask.flags.q.local_size_variable = 1;
 600       break;
 601    default:
 602       r = false;
 603       _mesa_glsl_error(loc, state,
 604                        "input layout qualifiers only valid in "
 605                        "geometry, tessellation, fragment and compute shaders");
 606       break;
 607    }
 608
 609    /* Generate an error when invalid input layout qualifiers are used. */
 610    if ((this->flags.i & ~valid_in_mask.flags.i) != 0) {
 611       r = false;
 612       _mesa_glsl_error(loc, state, "invalid input layout qualifiers used");
 613    }
 614
 615    /* The checks below are also performed when merging but we want to spit an
 616     * error against the default global input qualifier as soon as we can, with
 617     * the closest error location in the shader.
 618     */
 619    r &= validate_prim_type(loc, state, *state->in_qualifier, *this);
 620    r &= validate_vertex_spacing(loc, state, *state->in_qualifier, *this);
 621    r &= validate_ordering(loc, state, *state->in_qualifier, *this);
 622    r &= validate_point_mode(loc, state, *state->in_qualifier, *this);
 623
 624    return r;
 625 }
 626
 627 bool
 628 ast_type_qualifier::merge_into_in_qualifier(YYLTYPE *loc,
 629                                             _mesa_glsl_parse_state *state,
 630                                             ast_node* &node, bool create_node)
 631 {
 632    bool r = true;
 633    void *lin_ctx = state->linalloc;
 634
 635    /* We create the gs_input_layout node before merging so, in the future, no
 636     * more repeated nodes will be created as we will have the flag set.
 637     */
 638    if (state->stage == MESA_SHADER_GEOMETRY
 639        && this->flags.q.prim_type && !state->in_qualifier->flags.q.prim_type
 640        && create_node) {
 641       node = new(lin_ctx) ast_gs_input_layout(*loc, this->prim_type);
 642    }
 643
 644    r = state->in_qualifier->merge_qualifier(loc, state, *this, false);
 645
 646    if (state->in_qualifier->flags.q.early_fragment_tests) {
 647       state->fs_early_fragment_tests = true;
 648       state->in_qualifier->flags.q.early_fragment_tests = false;
 649    }
 650
 651    /* We allow the creation of multiple cs_input_layout nodes. Coherence among
 652     * all existing nodes is checked later, when the AST node is transformed
 653     * into HIR.
 654     */
 655    if (state->in_qualifier->flags.q.local_size) {
 656       if (create_node)
 657          node = new(lin_ctx) ast_cs_input_layout(*loc, state->in_qualifier->local_size);
 658       state->in_qualifier->flags.q.local_size = 0;
 659       for (int i = 0; i < 3; i++)
 660          state->in_qualifier->local_size[i] = NULL;
 661    }
 662
 663    if (state->in_qualifier->flags.q.local_size_variable) {
 664       state->cs_input_local_size_variable_specified = true;
 665       state->in_qualifier->flags.q.local_size_variable = false;
 666    }
 667
 668    return r;
 669 }
 670
 671 /**
 672  * Check if the current type qualifier has any illegal flags.
 673  *
 674  * If so, print an error message, followed by a list of illegal flags.
 675  *
 676  * \param message        The error message to print.
 677  * \param allowed_flags  A list of valid flags.
 678  */
 679 bool
 680 ast_type_qualifier::validate_flags(YYLTYPE *loc,
 681                                    _mesa_glsl_parse_state *state,
 682                                    const ast_type_qualifier &allowed_flags,
 683                                    const char *message, const char *name)
 684 {
 685    ast_type_qualifier bad;
 686    bad.flags.i = this->flags.i & ~allowed_flags.flags.i;
 687    if (bad.flags.i == 0)
 688       return true;
 689
 690    _mesa_glsl_error(loc, state,
 691                     "%s '%s':"
 692                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
 693                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
 694                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
 695                     message, name,
 696                     bad.flags.q.invariant ? " invariant" : "",
 697                     bad.flags.q.precise ? " precise" : "",
 698                     bad.flags.q.constant ? " constant" : "",
 699                     bad.flags.q.attribute ? " attribute" : "",
 700                     bad.flags.q.varying ? " varying" : "",
 701                     bad.flags.q.in ? " in" : "",
 702                     bad.flags.q.out ? " out" : "",
 703                     bad.flags.q.centroid ? " centroid" : "",
 704                     bad.flags.q.sample ? " sample" : "",
 705                     bad.flags.q.patch ? " patch" : "",
 706                     bad.flags.q.uniform ? " uniform" : "",
 707                     bad.flags.q.buffer ? " buffer" : "",
 708                     bad.flags.q.shared_storage ? " shared_storage" : "",
 709                     bad.flags.q.smooth ? " smooth" : "",
 710                     bad.flags.q.flat ? " flat" : "",
 711                     bad.flags.q.noperspective ? " noperspective" : "",
 712                     bad.flags.q.origin_upper_left ? " origin_upper_left" : "",
 713                     bad.flags.q.pixel_center_integer ? " pixel_center_integer" : "",
 714                     bad.flags.q.explicit_align ? " align" : "",
 715                     bad.flags.q.explicit_component ? " component" : "",
 716                     bad.flags.q.explicit_location ? " location" : "",
 717                     bad.flags.q.explicit_index ? " index" : "",
 718                     bad.flags.q.explicit_binding ? " binding" : "",
 719                     bad.flags.q.explicit_offset ? " offset" : "",
 720                     bad.flags.q.depth_any ? " depth_any" : "",
 721                     bad.flags.q.depth_greater ? " depth_greater" : "",
 722                     bad.flags.q.depth_less ? " depth_less" : "",
 723                     bad.flags.q.depth_unchanged ? " depth_unchanged" : "",
 724                     bad.flags.q.std140 ? " std140" : "",
 725                     bad.flags.q.std430 ? " std430" : "",
 726                     bad.flags.q.shared ? " shared" : "",
 727                     bad.flags.q.packed ? " packed" : "",
 728                     bad.flags.q.column_major ? " column_major" : "",
 729                     bad.flags.q.row_major ? " row_major" : "",
 730                     bad.flags.q.prim_type ? " prim_type" : "",
 731                     bad.flags.q.max_vertices ? " max_vertices" : "",
 732                     bad.flags.q.local_size ? " local_size" : "",
 733                     bad.flags.q.local_size_variable ? " local_size_variable" : "",
 734                     bad.flags.q.early_fragment_tests ? " early_fragment_tests" : "",
 735                     bad.flags.q.explicit_image_format ? " image_format" : "",
 736                     bad.flags.q.coherent ? " coherent" : "",
 737                     bad.flags.q._volatile ? " _volatile" : "",
 738                     bad.flags.q.restrict_flag ? " restrict_flag" : "",
 739                     bad.flags.q.read_only ? " read_only" : "",
 740                     bad.flags.q.write_only ? " write_only" : "",
 741                     bad.flags.q.invocations ? " invocations" : "",
 742                     bad.flags.q.stream ? " stream" : "",
 743                     bad.flags.q.explicit_stream ? " stream" : "",
 744                     bad.flags.q.explicit_xfb_offset ? " xfb_offset" : "",
 745                     bad.flags.q.xfb_buffer ? " xfb_buffer" : "",
 746                     bad.flags.q.explicit_xfb_buffer ? " xfb_buffer" : "",
 747                     bad.flags.q.xfb_stride ? " xfb_stride" : "",
 748                     bad.flags.q.explicit_xfb_stride ? " xfb_stride" : "",
 749                     bad.flags.q.vertex_spacing ? " vertex_spacing" : "",
 750                     bad.flags.q.ordering ? " ordering" : "",
 751                     bad.flags.q.point_mode ? " point_mode" : "",
 752                     bad.flags.q.vertices ? " vertices" : "",
 753                     bad.flags.q.subroutine ? " subroutine" : "",
 754                     bad.flags.q.subroutine_def ? " subroutine_def" : "");
 755    return false;
 756 }
 757
 758 bool
 759 ast_layout_expression::process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 760                                                   const char *qual_indentifier,
 761                                                   unsigned *value,
 762                                                   bool can_be_zero,
 763                                                   bool must_match)
 764 {
 765    int min_value = 0;
 766    bool first_pass = true;
 767    *value = 0;
 768
 769    if (!can_be_zero)
 770       min_value = 1;
 771
 772    for (exec_node *node = layout_const_expressions.get_head_raw();
 773         !node->is_tail_sentinel(); node = node->next) {
 774
 775       exec_list dummy_instructions;
 776       ast_node *const_expression = exec_node_data(ast_node, node, link);
 777
 778       ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 779
 780       ir_constant *const const_int = ir->constant_expression_value();
 781       if (const_int == NULL || !const_int->type->is_integer()) {
 782          YYLTYPE loc = const_expression->get_location();
 783          _mesa_glsl_error(&loc, state, "%s must be an integral constant "
 784                           "expression", qual_indentifier);
 785          return false;
 786       }
 787
 788       if (const_int->value.i[0] < min_value) {
 789          YYLTYPE loc = const_expression->get_location();
 790          _mesa_glsl_error(&loc, state, "%s layout qualifier is invalid "
 791                           "(%d < %d)", qual_indentifier,
 792                           const_int->value.i[0], min_value);
 793          return false;
 794       }
 795
 796       /* From section 4.4 "Layout Qualifiers" of the GLSL 4.50 spec:
 797        * "When the same layout-qualifier-name occurs multiple times,
 798        *  in a single declaration, the last occurrence overrides the
 799        *  former occurrence(s)."
 800        */
 801       if (!first_pass) {
 802          if ((must_match || !state->has_420pack()) && *value != const_int->value.u[0]) {
 803             YYLTYPE loc = const_expression->get_location();
 804             _mesa_glsl_error(&loc, state, "%s layout qualifier does not "
 805                              "match previous declaration (%d vs %d)",
 806                              qual_indentifier, *value, const_int->value.i[0]);
 807             return false;
 808          }
 809       } else {
 810          first_pass = false;
 811          *value = const_int->value.u[0];
 812       }
 813
 814       /* If the location is const (and we've verified that
 815        * it is) then no instructions should have been emitted
 816        * when we converted it to HIR. If they were emitted,
 817        * then either the location isn't const after all, or
 818        * we are emitting unnecessary instructions.
 819        */
 820       assert(dummy_instructions.is_empty());
 821    }
 822
 823    return true;
 824 }
 825
 826 bool
 827 process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 828                            YYLTYPE *loc,
 829                            const char *qual_indentifier,
 830                            ast_expression *const_expression,
 831                            unsigned *value)
 832 {
 833    exec_list dummy_instructions;
 834
 835    if (const_expression == NULL) {
 836       *value = 0;
 837       return true;
 838    }
 839
 840    ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 841
 842    ir_constant *const const_int = ir->constant_expression_value();
 843    if (const_int == NULL || !const_int->type->is_integer()) {
 844       _mesa_glsl_error(loc, state, "%s must be an integral constant "
 845                        "expression", qual_indentifier);
 846       return false;
 847    }
 848
 849    if (const_int->value.i[0] < 0) {
 850       _mesa_glsl_error(loc, state, "%s layout qualifier is invalid (%d < 0)",
 851                        qual_indentifier, const_int->value.u[0]);
 852       return false;
 853    }
 854
 855    /* If the location is const (and we've verified that
 856     * it is) then no instructions should have been emitted
 857     * when we converted it to HIR. If they were emitted,
 858     * then either the location isn't const after all, or
 859     * we are emitting unnecessary instructions.
 860     */
 861    assert(dummy_instructions.is_empty());
 862
 863    *value = const_int->value.u[0];
 864    return true;
 865 }