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       input_layout_mask.flags.i |=
 182          stream_layout_mask.flags.i;
 183    }
 184
 185    if (is_single_layout_merge && !state->has_enhanced_layouts() &&
 186        (this->flags.i & q.flags.i & ~allowed_duplicates_mask.flags.i) != 0) {
 187       _mesa_glsl_error(loc, state,
 188                        "duplicate layout qualifiers used");
 189       return false;
 190    }
 191
 192    if (q.flags.q.prim_type) {
 193       if (this->flags.q.prim_type && this->prim_type != q.prim_type) {
 194          _mesa_glsl_error(loc, state,
 195                           "conflicting primitive type qualifiers used");
 196          return false;
 197       }
 198       this->prim_type = q.prim_type;
 199    }
 200
 201    if (q.flags.q.max_vertices) {
 202       if (this->max_vertices) {
 203          this->max_vertices->merge_qualifier(q.max_vertices);
 204       } else {
 205          this->max_vertices = q.max_vertices;
 206       }
 207    }
 208
 209    if (q.flags.q.subroutine_def) {
 210       if (this->flags.q.subroutine_def) {
 211          _mesa_glsl_error(loc, state,
 212                           "conflicting subroutine qualifiers used");
 213       } else {
 214          this->subroutine_list = q.subroutine_list;
 215       }
 216    }
 217
 218    if (q.flags.q.invocations) {
 219       if (this->invocations) {
 220          this->invocations->merge_qualifier(q.invocations);
 221       } else {
 222          this->invocations = q.invocations;
 223       }
 224    }
 225
 226    if (state->stage == MESA_SHADER_GEOMETRY &&
 227        state->has_explicit_attrib_stream()) {
 228       if (!this->flags.q.explicit_stream) {
 229          if (q.flags.q.stream) {
 230             this->flags.q.stream = 1;
 231             this->stream = q.stream;
 232          } else if (!this->flags.q.stream && this->flags.q.out) {
 233             /* Assign default global stream value */
 234             this->flags.q.stream = 1;
 235             this->stream = state->out_qualifier->stream;
 236          }
 237       }
 238    }
 239
 240    if (state->has_enhanced_layouts()) {
 241       if (!this->flags.q.explicit_xfb_buffer) {
 242          if (q.flags.q.xfb_buffer) {
 243             this->flags.q.xfb_buffer = 1;
 244             this->xfb_buffer = q.xfb_buffer;
 245          } else if (!this->flags.q.xfb_buffer && this->flags.q.out) {
 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 {
 418       _mesa_glsl_error(loc, state, "out layout qualifiers only valid in "
 419                        "geometry, tessellation and vertex shaders");
 420       return false;
 421    }
 422
 423    /* Allow future assigments of global out's */
 424    this->flags.q.explicit_xfb_buffer = 0;
 425    this->flags.q.explicit_xfb_stride = 0;
 426
 427    /* Generate an error when invalid input layout qualifiers are used. */
 428    if ((q.flags.i & ~valid_out_mask.flags.i) != 0) {
 429       _mesa_glsl_error(loc, state,
 430                        "invalid output layout qualifiers used");
 431       return false;
 432    }
 433
 434    return r;
 435 }
 436
 437 bool
 438 ast_type_qualifier::merge_in_qualifier(YYLTYPE *loc,
 439                                        _mesa_glsl_parse_state *state,
 440                                        const ast_type_qualifier &q,
 441                                        ast_node* &node, bool create_node)
 442 {
 443    void *mem_ctx = state;
 444    bool create_gs_ast = false;
 445    bool create_cs_ast = false;
 446    ast_type_qualifier valid_in_mask;
 447    valid_in_mask.flags.i = 0;
 448
 449    switch (state->stage) {
 450    case MESA_SHADER_TESS_EVAL:
 451       if (q.flags.q.prim_type) {
 452          /* Make sure this is a valid input primitive type. */
 453          switch (q.prim_type) {
 454          case GL_TRIANGLES:
 455          case GL_QUADS:
 456          case GL_ISOLINES:
 457             break;
 458          default:
 459             _mesa_glsl_error(loc, state,
 460                              "invalid tessellation evaluation "
 461                              "shader input primitive type");
 462             break;
 463          }
 464       }
 465
 466       valid_in_mask.flags.q.prim_type = 1;
 467       valid_in_mask.flags.q.vertex_spacing = 1;
 468       valid_in_mask.flags.q.ordering = 1;
 469       valid_in_mask.flags.q.point_mode = 1;
 470       break;
 471    case MESA_SHADER_GEOMETRY:
 472       if (q.flags.q.prim_type) {
 473          /* Make sure this is a valid input primitive type. */
 474          switch (q.prim_type) {
 475          case GL_POINTS:
 476          case GL_LINES:
 477          case GL_LINES_ADJACENCY:
 478          case GL_TRIANGLES:
 479          case GL_TRIANGLES_ADJACENCY:
 480             break;
 481          default:
 482             _mesa_glsl_error(loc, state,
 483                              "invalid geometry shader input primitive type");
 484             break;
 485          }
 486       }
 487
 488       create_gs_ast |=
 489          q.flags.q.prim_type &&
 490          !state->in_qualifier->flags.q.prim_type;
 491
 492       valid_in_mask.flags.q.prim_type = 1;
 493       valid_in_mask.flags.q.invocations = 1;
 494       break;
 495    case MESA_SHADER_FRAGMENT:
 496       valid_in_mask.flags.q.early_fragment_tests = 1;
 497       break;
 498    case MESA_SHADER_COMPUTE:
 499       create_cs_ast |=
 500          q.flags.q.local_size != 0 &&
 501          state->in_qualifier->flags.q.local_size == 0;
 502
 503       valid_in_mask.flags.q.local_size = 7;
 504       break;
 505    default:
 506       _mesa_glsl_error(loc, state,
 507                        "input layout qualifiers only valid in "
 508                        "geometry, fragment and compute shaders");
 509       break;
 510    }
 511
 512    /* Generate an error when invalid input layout qualifiers are used. */
 513    if ((q.flags.i & ~valid_in_mask.flags.i) != 0) {
 514       _mesa_glsl_error(loc, state,
 515                        "invalid input layout qualifiers used");
 516       return false;
 517    }
 518
 519    /* Input layout qualifiers can be specified multiple
 520     * times in separate declarations, as long as they match.
 521     */
 522    if (this->flags.q.prim_type) {
 523       if (q.flags.q.prim_type &&
 524           this->prim_type != q.prim_type) {
 525          _mesa_glsl_error(loc, state,
 526                           "conflicting input primitive %s specified",
 527                           state->stage == MESA_SHADER_GEOMETRY ?
 528                           "type" : "mode");
 529       }
 530    } else if (q.flags.q.prim_type) {
 531       state->in_qualifier->flags.q.prim_type = 1;
 532       state->in_qualifier->prim_type = q.prim_type;
 533    }
 534
 535    if (q.flags.q.invocations) {
 536       this->flags.q.invocations = 1;
 537       if (this->invocations) {
 538          this->invocations->merge_qualifier(q.invocations);
 539       } else {
 540          this->invocations = q.invocations;
 541       }
 542    }
 543
 544    if (q.flags.q.early_fragment_tests) {
 545       state->fs_early_fragment_tests = true;
 546    }
 547
 548    if (this->flags.q.vertex_spacing) {
 549       if (q.flags.q.vertex_spacing &&
 550           this->vertex_spacing != q.vertex_spacing) {
 551          _mesa_glsl_error(loc, state,
 552                           "conflicting vertex spacing specified");
 553       }
 554    } else if (q.flags.q.vertex_spacing) {
 555       this->flags.q.vertex_spacing = 1;
 556       this->vertex_spacing = q.vertex_spacing;
 557    }
 558
 559    if (this->flags.q.ordering) {
 560       if (q.flags.q.ordering &&
 561           this->ordering != q.ordering) {
 562          _mesa_glsl_error(loc, state,
 563                           "conflicting ordering specified");
 564       }
 565    } else if (q.flags.q.ordering) {
 566       this->flags.q.ordering = 1;
 567       this->ordering = q.ordering;
 568    }
 569
 570    if (this->flags.q.point_mode) {
 571       if (q.flags.q.point_mode &&
 572           this->point_mode != q.point_mode) {
 573          _mesa_glsl_error(loc, state,
 574                           "conflicting point mode specified");
 575       }
 576    } else if (q.flags.q.point_mode) {
 577       this->flags.q.point_mode = 1;
 578       this->point_mode = q.point_mode;
 579    }
 580
 581    if (create_node) {
 582       if (create_gs_ast) {
 583          node = new(mem_ctx) ast_gs_input_layout(*loc, q.prim_type);
 584       } else if (create_cs_ast) {
 585          node = new(mem_ctx) ast_cs_input_layout(*loc, q.local_size);
 586       }
 587    }
 588
 589    return true;
 590 }
 591
 592 /**
 593  * Check if the current type qualifier has any illegal flags.
 594  *
 595  * If so, print an error message, followed by a list of illegal flags.
 596  *
 597  * \param message        The error message to print.
 598  * \param allowed_flags  A list of valid flags.
 599  */
 600 bool
 601 ast_type_qualifier::validate_flags(YYLTYPE *loc,
 602                                    _mesa_glsl_parse_state *state,
 603                                    const char *message,
 604                                    const ast_type_qualifier &allowed_flags)
 605 {
 606    ast_type_qualifier bad;
 607    bad.flags.i = this->flags.i & ~allowed_flags.flags.i;
 608    if (bad.flags.i == 0)
 609       return true;
 610
 611    _mesa_glsl_error(loc, state,
 612                     "%s:"
 613                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
 614                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
 615                     "%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
 616                     message,
 617                     bad.flags.q.invariant ? " invariant" : "",
 618                     bad.flags.q.precise ? " precise" : "",
 619                     bad.flags.q.constant ? " constant" : "",
 620                     bad.flags.q.attribute ? " attribute" : "",
 621                     bad.flags.q.varying ? " varying" : "",
 622                     bad.flags.q.in ? " in" : "",
 623                     bad.flags.q.out ? " out" : "",
 624                     bad.flags.q.centroid ? " centroid" : "",
 625                     bad.flags.q.sample ? " sample" : "",
 626                     bad.flags.q.patch ? " patch" : "",
 627                     bad.flags.q.uniform ? " uniform" : "",
 628                     bad.flags.q.buffer ? " buffer" : "",
 629                     bad.flags.q.shared_storage ? " shared_storage" : "",
 630                     bad.flags.q.smooth ? " smooth" : "",
 631                     bad.flags.q.flat ? " flat" : "",
 632                     bad.flags.q.noperspective ? " noperspective" : "",
 633                     bad.flags.q.origin_upper_left ? " origin_upper_left" : "",
 634                     bad.flags.q.pixel_center_integer ? " pixel_center_integer" : "",
 635                     bad.flags.q.explicit_align ? " align" : "",
 636                     bad.flags.q.explicit_location ? " location" : "",
 637                     bad.flags.q.explicit_index ? " index" : "",
 638                     bad.flags.q.explicit_binding ? " binding" : "",
 639                     bad.flags.q.explicit_offset ? " offset" : "",
 640                     bad.flags.q.depth_any ? " depth_any" : "",
 641                     bad.flags.q.depth_greater ? " depth_greater" : "",
 642                     bad.flags.q.depth_less ? " depth_less" : "",
 643                     bad.flags.q.depth_unchanged ? " depth_unchanged" : "",
 644                     bad.flags.q.std140 ? " std140" : "",
 645                     bad.flags.q.std430 ? " std430" : "",
 646                     bad.flags.q.shared ? " shared" : "",
 647                     bad.flags.q.packed ? " packed" : "",
 648                     bad.flags.q.column_major ? " column_major" : "",
 649                     bad.flags.q.row_major ? " row_major" : "",
 650                     bad.flags.q.prim_type ? " prim_type" : "",
 651                     bad.flags.q.max_vertices ? " max_vertices" : "",
 652                     bad.flags.q.local_size ? " local_size" : "",
 653                     bad.flags.q.early_fragment_tests ? " early_fragment_tests" : "",
 654                     bad.flags.q.explicit_image_format ? " image_format" : "",
 655                     bad.flags.q.coherent ? " coherent" : "",
 656                     bad.flags.q._volatile ? " _volatile" : "",
 657                     bad.flags.q.restrict_flag ? " restrict_flag" : "",
 658                     bad.flags.q.read_only ? " read_only" : "",
 659                     bad.flags.q.write_only ? " write_only" : "",
 660                     bad.flags.q.invocations ? " invocations" : "",
 661                     bad.flags.q.stream ? " stream" : "",
 662                     bad.flags.q.explicit_stream ? " stream" : "",
 663                     bad.flags.q.explicit_xfb_offset ? " xfb_offset" : "",
 664                     bad.flags.q.xfb_buffer ? " xfb_buffer" : "",
 665                     bad.flags.q.explicit_xfb_buffer ? " xfb_buffer" : "",
 666                     bad.flags.q.xfb_stride ? " xfb_stride" : "",
 667                     bad.flags.q.explicit_xfb_stride ? " xfb_stride" : "",
 668                     bad.flags.q.vertex_spacing ? " vertex_spacing" : "",
 669                     bad.flags.q.ordering ? " ordering" : "",
 670                     bad.flags.q.point_mode ? " point_mode" : "",
 671                     bad.flags.q.vertices ? " vertices" : "",
 672                     bad.flags.q.subroutine ? " subroutine" : "",
 673                     bad.flags.q.subroutine_def ? " subroutine_def" : "");
 674    return false;
 675 }
 676
 677 bool
 678 ast_layout_expression::process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 679                                                   const char *qual_indentifier,
 680                                                   unsigned *value,
 681                                                   bool can_be_zero)
 682 {
 683    int min_value = 0;
 684    bool first_pass = true;
 685    *value = 0;
 686
 687    if (!can_be_zero)
 688       min_value = 1;
 689
 690    for (exec_node *node = layout_const_expressions.head;
 691            !node->is_tail_sentinel(); node = node->next) {
 692
 693       exec_list dummy_instructions;
 694       ast_node *const_expression = exec_node_data(ast_node, node, link);
 695
 696       ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 697
 698       ir_constant *const const_int = ir->constant_expression_value();
 699       if (const_int == NULL || !const_int->type->is_integer()) {
 700          YYLTYPE loc = const_expression->get_location();
 701          _mesa_glsl_error(&loc, state, "%s must be an integral constant "
 702                           "expression", qual_indentifier);
 703          return false;
 704       }
 705
 706       if (const_int->value.i[0] < min_value) {
 707          YYLTYPE loc = const_expression->get_location();
 708          _mesa_glsl_error(&loc, state, "%s layout qualifier is invalid "
 709                           "(%d < %d)", qual_indentifier,
 710                           const_int->value.i[0], min_value);
 711          return false;
 712       }
 713
 714       /* From section 4.4 "Layout Qualifiers" of the GLSL 4.50 spec:
 715        * "When the same layout-qualifier-name occurs multiple times,
 716        *  in a single declaration, the last occurrence overrides the
 717        *  former occurrence(s)."
 718        */
 719       if (!state->has_420pack() && !first_pass && *value != const_int->value.u[0]) {
 720          YYLTYPE loc = const_expression->get_location();
 721          _mesa_glsl_error(&loc, state, "%s layout qualifier does not "
 722                           "match previous declaration (%d vs %d)",
 723                           qual_indentifier, *value, const_int->value.i[0]);
 724          return false;
 725       } else {
 726          first_pass = false;
 727          *value = const_int->value.u[0];
 728       }
 729
 730       /* If the location is const (and we've verified that
 731        * it is) then no instructions should have been emitted
 732        * when we converted it to HIR. If they were emitted,
 733        * then either the location isn't const after all, or
 734        * we are emitting unnecessary instructions.
 735        */
 736       assert(dummy_instructions.is_empty());
 737    }
 738
 739    return true;
 740 }
 741
 742 bool
 743 process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 744                            YYLTYPE *loc,
 745                            const char *qual_indentifier,
 746                            ast_expression *const_expression,
 747                            unsigned *value)
 748 {
 749    exec_list dummy_instructions;
 750
 751    if (const_expression == NULL) {
 752       *value = 0;
 753       return true;
 754    }
 755
 756    ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 757
 758    ir_constant *const const_int = ir->constant_expression_value();
 759    if (const_int == NULL || !const_int->type->is_integer()) {
 760       _mesa_glsl_error(loc, state, "%s must be an integral constant "
 761                        "expression", qual_indentifier);
 762       return false;
 763    }
 764
 765    if (const_int->value.i[0] < 0) {
 766       _mesa_glsl_error(loc, state, "%s layout qualifier is invalid (%d < 0)",
 767                        qual_indentifier, const_int->value.u[0]);
 768       return false;
 769    }
 770
 771    /* If the location is const (and we've verified that
 772     * it is) then no instructions should have been emitted
 773     * when we converted it to HIR. If they were emitted,
 774     * then either the location isn't const after all, or
 775     * we are emitting unnecessary instructions.
 776     */
 777    assert(dummy_instructions.is_empty());
 778
 779    *value = const_int->value.u[0];
 780    return true;
 781 }