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,
 186                        "duplicate layout qualifiers used");
 187       return false;
 188    }
 189
 190    if (q.flags.q.prim_type) {
 191       if (this->flags.q.prim_type && this->prim_type != q.prim_type) {
 192          _mesa_glsl_error(loc, state,
 193                           "conflicting primitive type qualifiers used");
 194          return false;
 195       }
 196       this->prim_type = q.prim_type;
 197    }
 198
 199    if (q.flags.q.max_vertices) {
 200       if (this->max_vertices) {
 201          this->max_vertices->merge_qualifier(q.max_vertices);
 202       } else {
 203          this->max_vertices = q.max_vertices;
 204       }
 205    }
 206
 207    if (q.flags.q.subroutine_def) {
 208       if (this->flags.q.subroutine_def) {
 209          _mesa_glsl_error(loc, state,
 210                           "conflicting subroutine qualifiers used");
 211       } else {
 212          this->subroutine_list = q.subroutine_list;
 213       }
 214    }
 215
 216    if (q.flags.q.invocations) {
 217       if (this->invocations) {
 218          this->invocations->merge_qualifier(q.invocations);
 219       } else {
 220          this->invocations = q.invocations;
 221       }
 222    }
 223
 224    if (state->stage == MESA_SHADER_GEOMETRY &&
 225        state->has_explicit_attrib_stream()) {
 226       if (!this->flags.q.explicit_stream) {
 227          if (q.flags.q.stream) {
 228             this->flags.q.stream = 1;
 229             this->stream = q.stream;
 230          } else if (!this->flags.q.stream && this->flags.q.out &&
 231                     !this->flags.q.in) {
 232             /* Assign default global stream value */
 233             this->flags.q.stream = 1;
 234             this->stream = state->out_qualifier->stream;
 235          }
 236       }
 237    }
 238
 239    if (state->has_enhanced_layouts()) {
 240       if (!this->flags.q.explicit_xfb_buffer) {
 241          if (q.flags.q.xfb_buffer) {
 242             this->flags.q.xfb_buffer = 1;
 243             this->xfb_buffer = q.xfb_buffer;
 244          } else if (!this->flags.q.xfb_buffer && this->flags.q.out &&
 245                     !this->flags.q.in) {
 246             /* Assign global xfb_buffer value */
 247             this->flags.q.xfb_buffer = 1;
 248             this->xfb_buffer = state->out_qualifier->xfb_buffer;
 249          }
 250       }
 251
 252       if (q.flags.q.explicit_xfb_stride)
 253          this->xfb_stride = q.xfb_stride;
 254
 255       /* Merge all we xfb_stride qualifiers into the global out */
 256       if (q.flags.q.explicit_xfb_stride || this->flags.q.xfb_stride) {
 257
 258          /* Set xfb_stride flag to 0 to avoid adding duplicates every time
 259           * there is a merge.
 260           */
 261          this->flags.q.xfb_stride = 0;
 262
 263          unsigned buff_idx;
 264          if (process_qualifier_constant(state, loc, "xfb_buffer",
 265                                         this->xfb_buffer, &buff_idx)) {
 266             if (state->out_qualifier->out_xfb_stride[buff_idx]) {
 267                state->out_qualifier->out_xfb_stride[buff_idx]->merge_qualifier(
 268                   new(state) ast_layout_expression(*loc, this->xfb_stride));
 269             } else {
 270                state->out_qualifier->out_xfb_stride[buff_idx] =
 271                   new(state) ast_layout_expression(*loc, this->xfb_stride);
 272             }
 273          }
 274       }
 275    }
 276
 277    if (q.flags.q.vertices) {
 278       if (this->vertices) {
 279          this->vertices->merge_qualifier(q.vertices);
 280       } else {
 281          this->vertices = q.vertices;
 282       }
 283    }
 284
 285    if (q.flags.q.vertex_spacing) {
 286       if (this->flags.q.vertex_spacing && this->vertex_spacing != q.vertex_spacing) {
 287          _mesa_glsl_error(loc, state,
 288                           "conflicting vertex spacing used");
 289          return false;
 290       }
 291       this->vertex_spacing = q.vertex_spacing;
 292    }
 293
 294    if (q.flags.q.ordering) {
 295       if (this->flags.q.ordering && this->ordering != q.ordering) {
 296          _mesa_glsl_error(loc, state,
 297                           "conflicting ordering used");
 298          return false;
 299       }
 300       this->ordering = q.ordering;
 301    }
 302
 303    if (q.flags.q.point_mode) {
 304       if (this->flags.q.point_mode && this->point_mode != q.point_mode) {
 305          _mesa_glsl_error(loc, state,
 306                           "conflicting point mode used");
 307          return false;
 308       }
 309       this->point_mode = q.point_mode;
 310    }
 311
 312    if ((q.flags.i & ubo_mat_mask.flags.i) != 0)
 313       this->flags.i &= ~ubo_mat_mask.flags.i;
 314    if ((q.flags.i & ubo_layout_mask.flags.i) != 0)
 315       this->flags.i &= ~ubo_layout_mask.flags.i;
 316
 317    for (int i = 0; i < 3; i++) {
 318       if (q.flags.q.local_size & (1 << i)) {
 319          if (this->local_size[i]) {
 320             this->local_size[i]->merge_qualifier(q.local_size[i]);
 321          } else {
 322             this->local_size[i] = q.local_size[i];
 323          }
 324       }
 325    }
 326
 327    this->flags.i |= q.flags.i;
 328
 329    if (this->flags.q.in &&
 330        (this->flags.i & ~input_layout_mask.flags.i) != 0) {
 331       _mesa_glsl_error(loc, state,
 332                        "invalid input layout qualifier used");
 333       return false;
 334    }
 335
 336    if (q.flags.q.explicit_align)
 337       this->align = q.align;
 338
 339    if (q.flags.q.explicit_location)
 340       this->location = q.location;
 341
 342    if (q.flags.q.explicit_index)
 343       this->index = q.index;
 344
 345   if (q.flags.q.explicit_component)
 346       this->component = q.component;
 347
 348    if (q.flags.q.explicit_binding)
 349       this->binding = q.binding;
 350
 351    if (q.flags.q.explicit_offset || q.flags.q.explicit_xfb_offset)
 352       this->offset = q.offset;
 353
 354    if (q.precision != ast_precision_none)
 355       this->precision = q.precision;
 356
 357    if (q.flags.q.explicit_image_format) {
 358       this->image_format = q.image_format;
 359       this->image_base_type = q.image_base_type;
 360    }
 361
 362    return true;
 363 }
 364
 365 bool
 366 ast_type_qualifier::merge_out_qualifier(YYLTYPE *loc,
 367                                         _mesa_glsl_parse_state *state,
 368                                         const ast_type_qualifier &q,
 369                                         ast_node* &node, bool create_node)
 370 {
 371    void *mem_ctx = state;
 372    const bool r = this->merge_qualifier(loc, state, q, false);
 373    ast_type_qualifier valid_out_mask;
 374    valid_out_mask.flags.i = 0;
 375
 376    if (state->stage == MESA_SHADER_GEOMETRY) {
 377       if (q.flags.q.prim_type) {
 378          /* Make sure this is a valid output primitive type. */
 379          switch (q.prim_type) {
 380          case GL_POINTS:
 381          case GL_LINE_STRIP:
 382          case GL_TRIANGLE_STRIP:
 383             break;
 384          default:
 385             _mesa_glsl_error(loc, state, "invalid geometry shader output "
 386                              "primitive type");
 387             break;
 388          }
 389       }
 390
 391       /* Allow future assigments of global out's stream id value */
 392       this->flags.q.explicit_stream = 0;
 393
 394       valid_out_mask.flags.q.stream = 1;
 395       valid_out_mask.flags.q.explicit_stream = 1;
 396       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 397       valid_out_mask.flags.q.xfb_buffer = 1;
 398       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 399       valid_out_mask.flags.q.xfb_stride = 1;
 400       valid_out_mask.flags.q.max_vertices = 1;
 401       valid_out_mask.flags.q.prim_type = 1;
 402    } else if (state->stage == MESA_SHADER_TESS_CTRL) {
 403       if (create_node) {
 404          node = new(mem_ctx) ast_tcs_output_layout(*loc);
 405       }
 406       valid_out_mask.flags.q.vertices = 1;
 407       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 408       valid_out_mask.flags.q.xfb_buffer = 1;
 409       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 410       valid_out_mask.flags.q.xfb_stride = 1;
 411    } else if (state->stage == MESA_SHADER_TESS_EVAL ||
 412               state->stage == MESA_SHADER_VERTEX) {
 413       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 414       valid_out_mask.flags.q.xfb_buffer = 1;
 415       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 416       valid_out_mask.flags.q.xfb_stride = 1;
 417    } else if (state->stage == MESA_SHADER_FRAGMENT) {
 418       valid_out_mask.flags.q.blend_support = 1;
 419    } else {
 420       _mesa_glsl_error(loc, state, "out layout qualifiers only valid in "
 421                        "geometry, tessellation and vertex shaders");
 422       return false;
 423    }
 424
 425    /* Allow future assigments of global out's */
 426    this->flags.q.explicit_xfb_buffer = 0;
 427    this->flags.q.explicit_xfb_stride = 0;
 428
 429    /* Generate an error when invalid input layout qualifiers are used. */
 430    if ((q.flags.i & ~valid_out_mask.flags.i) != 0) {
 431       _mesa_glsl_error(loc, state,
 432                        "invalid output layout qualifiers used");
 433       return false;
 434    }
 435
 436    return r;
 437 }
 438
 439 bool
 440 ast_type_qualifier::merge_in_qualifier(YYLTYPE *loc,
 441                                        _mesa_glsl_parse_state *state,
 442                                        const ast_type_qualifier &q,
 443                                        ast_node* &node, bool create_node)
 444 {
 445    void *mem_ctx = state;
 446    bool create_gs_ast = false;
 447    bool create_cs_ast = false;
 448    ast_type_qualifier valid_in_mask;
 449    valid_in_mask.flags.i = 0;
 450
 451    switch (state->stage) {
 452    case MESA_SHADER_TESS_EVAL:
 453       if (q.flags.q.prim_type) {
 454          /* Make sure this is a valid input primitive type. */
 455          switch (q.prim_type) {
 456          case GL_TRIANGLES:
 457          case GL_QUADS:
 458          case GL_ISOLINES:
 459             break;
 460          default:
 461             _mesa_glsl_error(loc, state,
 462                              "invalid tessellation evaluation "
 463                              "shader input primitive type");
 464             break;
 465          }
 466       }
 467
 468       valid_in_mask.flags.q.prim_type = 1;
 469       valid_in_mask.flags.q.vertex_spacing = 1;
 470       valid_in_mask.flags.q.ordering = 1;
 471       valid_in_mask.flags.q.point_mode = 1;
 472       break;
 473    case MESA_SHADER_GEOMETRY:
 474       if (q.flags.q.prim_type) {
 475          /* Make sure this is a valid input primitive type. */
 476          switch (q.prim_type) {
 477          case GL_POINTS:
 478          case GL_LINES:
 479          case GL_LINES_ADJACENCY:
 480          case GL_TRIANGLES:
 481          case GL_TRIANGLES_ADJACENCY:
 482             break;
 483          default:
 484             _mesa_glsl_error(loc, state,
 485                              "invalid geometry shader input primitive type");
 486             break;
 487          }
 488       }
 489
 490       create_gs_ast |=
 491          q.flags.q.prim_type &&
 492          !state->in_qualifier->flags.q.prim_type;
 493
 494       valid_in_mask.flags.q.prim_type = 1;
 495       valid_in_mask.flags.q.invocations = 1;
 496       break;
 497    case MESA_SHADER_FRAGMENT:
 498       valid_in_mask.flags.q.early_fragment_tests = 1;
 499       break;
 500    case MESA_SHADER_COMPUTE:
 501       create_cs_ast |=
 502          q.flags.q.local_size != 0 &&
 503          state->in_qualifier->flags.q.local_size == 0;
 504
 505       valid_in_mask.flags.q.local_size = 7;
 506       break;
 507    default:
 508       _mesa_glsl_error(loc, state,
 509                        "input layout qualifiers only valid in "
 510                        "geometry, fragment and compute shaders");
 511       break;
 512    }
 513
 514    /* Generate an error when invalid input layout qualifiers are used. */
 515    if ((q.flags.i & ~valid_in_mask.flags.i) != 0) {
 516       _mesa_glsl_error(loc, state,
 517                        "invalid input layout qualifiers used");
 518       return false;
 519    }
 520
 521    /* Input layout qualifiers can be specified multiple
 522     * times in separate declarations, as long as they match.
 523     */
 524    if (this->flags.q.prim_type) {
 525       if (q.flags.q.prim_type &&
 526           this->prim_type != q.prim_type) {
 527          _mesa_glsl_error(loc, state,
 528                           "conflicting input primitive %s specified",
 529                           state->stage == MESA_SHADER_GEOMETRY ?
 530                           "type" : "mode");
 531       }
 532    } else if (q.flags.q.prim_type) {
 533       state->in_qualifier->flags.q.prim_type = 1;
 534       state->in_qualifier->prim_type = q.prim_type;
 535    }
 536
 537    if (q.flags.q.invocations) {
 538       this->flags.q.invocations = 1;
 539       if (this->invocations) {
 540          this->invocations->merge_qualifier(q.invocations);
 541       } else {
 542          this->invocations = q.invocations;
 543       }
 544    }
 545
 546    if (q.flags.q.early_fragment_tests) {
 547       state->fs_early_fragment_tests = true;
 548    }
 549
 550    if (this->flags.q.vertex_spacing) {
 551       if (q.flags.q.vertex_spacing &&
 552           this->vertex_spacing != q.vertex_spacing) {
 553          _mesa_glsl_error(loc, state,
 554                           "conflicting vertex spacing specified");
 555       }
 556    } else if (q.flags.q.vertex_spacing) {
 557       this->flags.q.vertex_spacing = 1;
 558       this->vertex_spacing = q.vertex_spacing;
 559    }
 560
 561    if (this->flags.q.ordering) {
 562       if (q.flags.q.ordering &&
 563           this->ordering != q.ordering) {
 564          _mesa_glsl_error(loc, state,
 565                           "conflicting ordering specified");
 566       }
 567    } else if (q.flags.q.ordering) {
 568       this->flags.q.ordering = 1;
 569       this->ordering = q.ordering;
 570    }
 571
 572    if (this->flags.q.point_mode) {
 573       if (q.flags.q.point_mode &&
 574           this->point_mode != q.point_mode) {
 575          _mesa_glsl_error(loc, state,
 576                           "conflicting point mode specified");
 577       }
 578    } else if (q.flags.q.point_mode) {
 579       this->flags.q.point_mode = 1;
 580       this->point_mode = q.point_mode;
 581    }
 582
 583    if (create_node) {
 584       if (create_gs_ast) {
 585          node = new(mem_ctx) ast_gs_input_layout(*loc, q.prim_type);
 586       } else if (create_cs_ast) {
 587          node = new(mem_ctx) ast_cs_input_layout(*loc, q.local_size);
 588       }
 589    }
 590
 591    return true;
 592 }
 593
 594 /**
 595  * Check if the current type qualifier has any illegal flags.
 596  *
 597  * If so, print an error message, followed by a list of illegal flags.
 598  *
 599  * \param message        The error message to print.
 600  * \param allowed_flags  A list of valid flags.
 601  */
 602 bool
 603 ast_type_qualifier::validate_flags(YYLTYPE *loc,
 604                                    _mesa_glsl_parse_state *state,
 605                                    const ast_type_qualifier &allowed_flags,
 606                                    const char *message, const char *name)
 607 {
 608    ast_type_qualifier bad;
 609    bad.flags.i = this->flags.i & ~allowed_flags.flags.i;
 610    if (bad.flags.i == 0)
 611       return true;
 612
 613    _mesa_glsl_error(loc, state,
 614                     "%s '%s':"
 615                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
 616                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
 617                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
 618                     message, name,
 619                     bad.flags.q.invariant ? " invariant" : "",
 620                     bad.flags.q.precise ? " precise" : "",
 621                     bad.flags.q.constant ? " constant" : "",
 622                     bad.flags.q.attribute ? " attribute" : "",
 623                     bad.flags.q.varying ? " varying" : "",
 624                     bad.flags.q.in ? " in" : "",
 625                     bad.flags.q.out ? " out" : "",
 626                     bad.flags.q.centroid ? " centroid" : "",
 627                     bad.flags.q.sample ? " sample" : "",
 628                     bad.flags.q.patch ? " patch" : "",
 629                     bad.flags.q.uniform ? " uniform" : "",
 630                     bad.flags.q.buffer ? " buffer" : "",
 631                     bad.flags.q.shared_storage ? " shared_storage" : "",
 632                     bad.flags.q.smooth ? " smooth" : "",
 633                     bad.flags.q.flat ? " flat" : "",
 634                     bad.flags.q.noperspective ? " noperspective" : "",
 635                     bad.flags.q.origin_upper_left ? " origin_upper_left" : "",
 636                     bad.flags.q.pixel_center_integer ? " pixel_center_integer" : "",
 637                     bad.flags.q.explicit_align ? " align" : "",
 638                     bad.flags.q.explicit_component ? " component" : "",
 639                     bad.flags.q.explicit_location ? " location" : "",
 640                     bad.flags.q.explicit_index ? " index" : "",
 641                     bad.flags.q.explicit_binding ? " binding" : "",
 642                     bad.flags.q.explicit_offset ? " offset" : "",
 643                     bad.flags.q.depth_any ? " depth_any" : "",
 644                     bad.flags.q.depth_greater ? " depth_greater" : "",
 645                     bad.flags.q.depth_less ? " depth_less" : "",
 646                     bad.flags.q.depth_unchanged ? " depth_unchanged" : "",
 647                     bad.flags.q.std140 ? " std140" : "",
 648                     bad.flags.q.std430 ? " std430" : "",
 649                     bad.flags.q.shared ? " shared" : "",
 650                     bad.flags.q.packed ? " packed" : "",
 651                     bad.flags.q.column_major ? " column_major" : "",
 652                     bad.flags.q.row_major ? " row_major" : "",
 653                     bad.flags.q.prim_type ? " prim_type" : "",
 654                     bad.flags.q.max_vertices ? " max_vertices" : "",
 655                     bad.flags.q.local_size ? " local_size" : "",
 656                     bad.flags.q.early_fragment_tests ? " early_fragment_tests" : "",
 657                     bad.flags.q.explicit_image_format ? " image_format" : "",
 658                     bad.flags.q.coherent ? " coherent" : "",
 659                     bad.flags.q._volatile ? " _volatile" : "",
 660                     bad.flags.q.restrict_flag ? " restrict_flag" : "",
 661                     bad.flags.q.read_only ? " read_only" : "",
 662                     bad.flags.q.write_only ? " write_only" : "",
 663                     bad.flags.q.invocations ? " invocations" : "",
 664                     bad.flags.q.stream ? " stream" : "",
 665                     bad.flags.q.explicit_stream ? " stream" : "",
 666                     bad.flags.q.explicit_xfb_offset ? " xfb_offset" : "",
 667                     bad.flags.q.xfb_buffer ? " xfb_buffer" : "",
 668                     bad.flags.q.explicit_xfb_buffer ? " xfb_buffer" : "",
 669                     bad.flags.q.xfb_stride ? " xfb_stride" : "",
 670                     bad.flags.q.explicit_xfb_stride ? " xfb_stride" : "",
 671                     bad.flags.q.vertex_spacing ? " vertex_spacing" : "",
 672                     bad.flags.q.ordering ? " ordering" : "",
 673                     bad.flags.q.point_mode ? " point_mode" : "",
 674                     bad.flags.q.vertices ? " vertices" : "",
 675                     bad.flags.q.subroutine ? " subroutine" : "",
 676                     bad.flags.q.subroutine_def ? " subroutine_def" : "");
 677    return false;
 678 }
 679
 680 bool
 681 ast_layout_expression::process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 682                                                   const char *qual_indentifier,
 683                                                   unsigned *value,
 684                                                   bool can_be_zero,
 685                                                   bool must_match)
 686 {
 687    int min_value = 0;
 688    bool first_pass = true;
 689    *value = 0;
 690
 691    if (!can_be_zero)
 692       min_value = 1;
 693
 694    for (exec_node *node = layout_const_expressions.get_head_raw();
 695         !node->is_tail_sentinel(); node = node->next) {
 696
 697       exec_list dummy_instructions;
 698       ast_node *const_expression = exec_node_data(ast_node, node, link);
 699
 700       ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 701
 702       ir_constant *const const_int = ir->constant_expression_value();
 703       if (const_int == NULL || !const_int->type->is_integer()) {
 704          YYLTYPE loc = const_expression->get_location();
 705          _mesa_glsl_error(&loc, state, "%s must be an integral constant "
 706                           "expression", qual_indentifier);
 707          return false;
 708       }
 709
 710       if (const_int->value.i[0] < min_value) {
 711          YYLTYPE loc = const_expression->get_location();
 712          _mesa_glsl_error(&loc, state, "%s layout qualifier is invalid "
 713                           "(%d < %d)", qual_indentifier,
 714                           const_int->value.i[0], min_value);
 715          return false;
 716       }
 717
 718       /* From section 4.4 "Layout Qualifiers" of the GLSL 4.50 spec:
 719        * "When the same layout-qualifier-name occurs multiple times,
 720        *  in a single declaration, the last occurrence overrides the
 721        *  former occurrence(s)."
 722        */
 723       if (!first_pass) {
 724          if ((must_match || !state->has_420pack()) && *value != const_int->value.u[0]) {
 725             YYLTYPE loc = const_expression->get_location();
 726             _mesa_glsl_error(&loc, state, "%s layout qualifier does not "
 727                              "match previous declaration (%d vs %d)",
 728                              qual_indentifier, *value, const_int->value.i[0]);
 729             return false;
 730          }
 731       } else {
 732          first_pass = false;
 733          *value = const_int->value.u[0];
 734       }
 735
 736       /* If the location is const (and we've verified that
 737        * it is) then no instructions should have been emitted
 738        * when we converted it to HIR. If they were emitted,
 739        * then either the location isn't const after all, or
 740        * we are emitting unnecessary instructions.
 741        */
 742       assert(dummy_instructions.is_empty());
 743    }
 744
 745    return true;
 746 }
 747
 748 bool
 749 process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 750                            YYLTYPE *loc,
 751                            const char *qual_indentifier,
 752                            ast_expression *const_expression,
 753                            unsigned *value)
 754 {
 755    exec_list dummy_instructions;
 756
 757    if (const_expression == NULL) {
 758       *value = 0;
 759       return true;
 760    }
 761
 762    ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 763
 764    ir_constant *const const_int = ir->constant_expression_value();
 765    if (const_int == NULL || !const_int->type->is_integer()) {
 766       _mesa_glsl_error(loc, state, "%s must be an integral constant "
 767                        "expression", qual_indentifier);
 768       return false;
 769    }
 770
 771    if (const_int->value.i[0] < 0) {
 772       _mesa_glsl_error(loc, state, "%s layout qualifier is invalid (%d < 0)",
 773                        qual_indentifier, const_int->value.u[0]);
 774       return false;
 775    }
 776
 777    /* If the location is const (and we've verified that
 778     * it is) then no instructions should have been emitted
 779     * when we converted it to HIR. If they were emitted,
 780     * then either the location isn't const after all, or
 781     * we are emitting unnecessary instructions.
 782     */
 783    assert(dummy_instructions.is_empty());
 784
 785    *value = const_int->value.u[0];
 786    return true;
 787 }