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