src/compiler/glsl/ast_type.cpp

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include "ast.h"
  25
  26 void
  27 ast_type_specifier::print(void) const
  28 {
  29    if (structure) {
  30       structure->print();
  31    } else {
  32       printf("%s ", type_name);
  33    }
  34
  35    if (array_specifier) {
  36       array_specifier->print();
  37    }
  38 }
  39
  40 bool
  41 ast_fully_specified_type::has_qualifiers(_mesa_glsl_parse_state *state) const
  42 {
  43    /* 'subroutine' isnt a real qualifier. */
  44    ast_type_qualifier subroutine_only;
  45    subroutine_only.flags.i = 0;
  46    subroutine_only.flags.q.subroutine = 1;
  47    subroutine_only.flags.q.subroutine_def = 1;
  48    if (state->has_explicit_uniform_location()) {
  49       subroutine_only.flags.q.explicit_index = 1;
  50    }
  51    return (this->qualifier.flags.i & ~subroutine_only.flags.i) != 0;
  52 }
  53
  54 bool ast_type_qualifier::has_interpolation() const
  55 {
  56    return this->flags.q.smooth
  57           || this->flags.q.flat
  58           || this->flags.q.noperspective;
  59 }
  60
  61 bool
  62 ast_type_qualifier::has_layout() const
  63 {
  64    return this->flags.q.origin_upper_left
  65           || this->flags.q.pixel_center_integer
  66           || this->flags.q.depth_any
  67           || this->flags.q.depth_greater
  68           || this->flags.q.depth_less
  69           || this->flags.q.depth_unchanged
  70           || this->flags.q.std140
  71           || this->flags.q.std430
  72           || this->flags.q.shared
  73           || this->flags.q.column_major
  74           || this->flags.q.row_major
  75           || this->flags.q.packed
  76           || this->flags.q.explicit_align
  77           || this->flags.q.explicit_component
  78           || this->flags.q.explicit_location
  79           || this->flags.q.explicit_image_format
  80           || this->flags.q.explicit_index
  81           || this->flags.q.explicit_binding
  82           || this->flags.q.explicit_offset
  83           || this->flags.q.explicit_stream
  84           || this->flags.q.explicit_xfb_buffer
  85           || this->flags.q.explicit_xfb_offset
  86           || this->flags.q.explicit_xfb_stride;
  87 }
  88
  89 bool
  90 ast_type_qualifier::has_storage() const
  91 {
  92    return this->flags.q.constant
  93           || this->flags.q.attribute
  94           || this->flags.q.varying
  95           || this->flags.q.in
  96           || this->flags.q.out
  97           || this->flags.q.uniform
  98           || this->flags.q.buffer
  99           || this->flags.q.shared_storage;
 100 }
 101
 102 bool
 103 ast_type_qualifier::has_auxiliary_storage() const
 104 {
 105    return this->flags.q.centroid
 106           || this->flags.q.sample
 107           || this->flags.q.patch;
 108 }
 109
 110 bool ast_type_qualifier::has_memory() const
 111 {
 112    return this->flags.q.coherent
 113           || this->flags.q._volatile
 114           || this->flags.q.restrict_flag
 115           || this->flags.q.read_only
 116           || this->flags.q.write_only;
 117 }
 118
 119 /**
 120  * This function merges both duplicate identifies within a single layout and
 121  * multiple layout qualifiers on a single variable declaration. The
 122  * is_single_layout_merge param is used differentiate between the two.
 123  */
 124 bool
 125 ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
 126                                     _mesa_glsl_parse_state *state,
 127                                     const ast_type_qualifier &q,
 128                                     bool is_single_layout_merge)
 129 {
 130    ast_type_qualifier ubo_mat_mask;
 131    ubo_mat_mask.flags.i = 0;
 132    ubo_mat_mask.flags.q.row_major = 1;
 133    ubo_mat_mask.flags.q.column_major = 1;
 134
 135    ast_type_qualifier ubo_layout_mask;
 136    ubo_layout_mask.flags.i = 0;
 137    ubo_layout_mask.flags.q.std140 = 1;
 138    ubo_layout_mask.flags.q.packed = 1;
 139    ubo_layout_mask.flags.q.shared = 1;
 140    ubo_layout_mask.flags.q.std430 = 1;
 141
 142    ast_type_qualifier ubo_binding_mask;
 143    ubo_binding_mask.flags.i = 0;
 144    ubo_binding_mask.flags.q.explicit_binding = 1;
 145    ubo_binding_mask.flags.q.explicit_offset = 1;
 146
 147    ast_type_qualifier stream_layout_mask;
 148    stream_layout_mask.flags.i = 0;
 149    stream_layout_mask.flags.q.stream = 1;
 150
 151    /* FIXME: We should probably do interface and function param validation
 152     * separately.
 153     */
 154    ast_type_qualifier input_layout_mask;
 155    input_layout_mask.flags.i = 0;
 156    input_layout_mask.flags.q.centroid = 1;
 157    /* Function params can have constant */
 158    input_layout_mask.flags.q.constant = 1;
 159    input_layout_mask.flags.q.explicit_component = 1;
 160    input_layout_mask.flags.q.explicit_location = 1;
 161    input_layout_mask.flags.q.flat = 1;
 162    input_layout_mask.flags.q.in = 1;
 163    input_layout_mask.flags.q.invariant = 1;
 164    input_layout_mask.flags.q.noperspective = 1;
 165    input_layout_mask.flags.q.origin_upper_left = 1;
 166    /* Function params 'inout' will set this */
 167    input_layout_mask.flags.q.out = 1;
 168    input_layout_mask.flags.q.patch = 1;
 169    input_layout_mask.flags.q.pixel_center_integer = 1;
 170    input_layout_mask.flags.q.precise = 1;
 171    input_layout_mask.flags.q.sample = 1;
 172    input_layout_mask.flags.q.smooth = 1;
 173
 174    /* Uniform block layout qualifiers get to overwrite each
 175     * other (rightmost having priority), while all other
 176     * qualifiers currently don't allow duplicates.
 177     */
 178    ast_type_qualifier allowed_duplicates_mask;
 179    allowed_duplicates_mask.flags.i =
 180       ubo_mat_mask.flags.i |
 181       ubo_layout_mask.flags.i |
 182       ubo_binding_mask.flags.i;
 183
 184    /* Geometry shaders can have several layout qualifiers
 185     * assigning different stream values.
 186     */
 187    if (state->stage == MESA_SHADER_GEOMETRY) {
 188       allowed_duplicates_mask.flags.i |=
 189          stream_layout_mask.flags.i;
 190    }
 191
 192    if (is_single_layout_merge && !state->has_enhanced_layouts() &&
 193        (this->flags.i & q.flags.i & ~allowed_duplicates_mask.flags.i) != 0) {
 194       _mesa_glsl_error(loc, state, "duplicate layout qualifiers used");
 195       return false;
 196    }
 197
 198    if (q.flags.q.prim_type) {
 199       if (this->flags.q.prim_type && this->prim_type != q.prim_type) {
 200          _mesa_glsl_error(loc, state,
 201                           "conflicting primitive type qualifiers used");
 202          return false;
 203       }
 204       this->prim_type = q.prim_type;
 205    }
 206
 207    if (q.flags.q.max_vertices) {
 208       if (this->max_vertices && !is_single_layout_merge) {
 209          this->max_vertices->merge_qualifier(q.max_vertices);
 210       } else {
 211          this->max_vertices = q.max_vertices;
 212       }
 213    }
 214
 215    if (q.flags.q.subroutine_def) {
 216       if (this->flags.q.subroutine_def) {
 217          _mesa_glsl_error(loc, state,
 218                           "conflicting subroutine qualifiers used");
 219       } else {
 220          this->subroutine_list = q.subroutine_list;
 221       }
 222    }
 223
 224    if (q.flags.q.invocations) {
 225       if (this->invocations && !is_single_layout_merge) {
 226          this->invocations->merge_qualifier(q.invocations);
 227       } else {
 228          this->invocations = q.invocations;
 229       }
 230    }
 231
 232    if (state->stage == MESA_SHADER_GEOMETRY &&
 233        state->has_explicit_attrib_stream()) {
 234       if (!this->flags.q.explicit_stream) {
 235          if (q.flags.q.stream) {
 236             this->flags.q.stream = 1;
 237             this->stream = q.stream;
 238          } else if (!this->flags.q.stream && this->flags.q.out &&
 239                     !this->flags.q.in) {
 240             /* Assign default global stream value */
 241             this->flags.q.stream = 1;
 242             this->stream = state->out_qualifier->stream;
 243          }
 244       }
 245    }
 246
 247    if (state->has_enhanced_layouts()) {
 248       if (!this->flags.q.explicit_xfb_buffer) {
 249          if (q.flags.q.xfb_buffer) {
 250             this->flags.q.xfb_buffer = 1;
 251             this->xfb_buffer = q.xfb_buffer;
 252          } else if (!this->flags.q.xfb_buffer && this->flags.q.out &&
 253                     !this->flags.q.in) {
 254             /* Assign global xfb_buffer value */
 255             this->flags.q.xfb_buffer = 1;
 256             this->xfb_buffer = state->out_qualifier->xfb_buffer;
 257          }
 258       }
 259
 260       if (q.flags.q.explicit_xfb_stride)
 261          this->xfb_stride = q.xfb_stride;
 262
 263       /* Merge all we xfb_stride qualifiers into the global out */
 264       if (q.flags.q.explicit_xfb_stride || this->flags.q.xfb_stride) {
 265
 266          /* Set xfb_stride flag to 0 to avoid adding duplicates every time
 267           * there is a merge.
 268           */
 269          this->flags.q.xfb_stride = 0;
 270
 271          unsigned buff_idx;
 272          if (process_qualifier_constant(state, loc, "xfb_buffer",
 273                                         this->xfb_buffer, &buff_idx)) {
 274             if (state->out_qualifier->out_xfb_stride[buff_idx]
 275                 && !is_single_layout_merge) {
 276                state->out_qualifier->out_xfb_stride[buff_idx]->merge_qualifier(
 277                   new(state->linalloc) ast_layout_expression(*loc, this->xfb_stride));
 278             } else {
 279                state->out_qualifier->out_xfb_stride[buff_idx] =
 280                   new(state->linalloc) ast_layout_expression(*loc, this->xfb_stride);
 281             }
 282          }
 283       }
 284    }
 285
 286    if (q.flags.q.vertices) {
 287       if (this->vertices && !is_single_layout_merge) {
 288          this->vertices->merge_qualifier(q.vertices);
 289       } else {
 290          this->vertices = q.vertices;
 291       }
 292    }
 293
 294    if (q.flags.q.vertex_spacing) {
 295       if (this->flags.q.vertex_spacing && this->vertex_spacing != q.vertex_spacing) {
 296          _mesa_glsl_error(loc, state, "conflicting vertex spacing used");
 297          return false;
 298       }
 299       this->vertex_spacing = q.vertex_spacing;
 300    }
 301
 302    if (q.flags.q.ordering) {
 303       if (this->flags.q.ordering && this->ordering != q.ordering) {
 304          _mesa_glsl_error(loc, state, "conflicting ordering used");
 305          return false;
 306       }
 307       this->ordering = q.ordering;
 308    }
 309
 310    if (q.flags.q.point_mode) {
 311       if (this->flags.q.point_mode && this->point_mode != q.point_mode) {
 312          _mesa_glsl_error(loc, state, "conflicting point mode used");
 313          return false;
 314       }
 315       this->point_mode = q.point_mode;
 316    }
 317
 318    if ((q.flags.i & ubo_mat_mask.flags.i) != 0)
 319       this->flags.i &= ~ubo_mat_mask.flags.i;
 320    if ((q.flags.i & ubo_layout_mask.flags.i) != 0)
 321       this->flags.i &= ~ubo_layout_mask.flags.i;
 322
 323    for (int i = 0; i < 3; i++) {
 324       if (q.flags.q.local_size & (1 << i)) {
 325          if (this->local_size[i] && !is_single_layout_merge) {
 326             this->local_size[i]->merge_qualifier(q.local_size[i]);
 327          } else {
 328             this->local_size[i] = q.local_size[i];
 329          }
 330       }
 331    }
 332
 333    this->flags.i |= q.flags.i;
 334
 335    if (this->flags.q.in &&
 336        (this->flags.i & ~input_layout_mask.flags.i) != 0) {
 337       _mesa_glsl_error(loc, state, "invalid input layout qualifier used");
 338       return false;
 339    }
 340
 341    if (q.flags.q.explicit_align)
 342       this->align = q.align;
 343
 344    if (q.flags.q.explicit_location)
 345       this->location = q.location;
 346
 347    if (q.flags.q.explicit_index)
 348       this->index = q.index;
 349
 350   if (q.flags.q.explicit_component)
 351       this->component = q.component;
 352
 353    if (q.flags.q.explicit_binding)
 354       this->binding = q.binding;
 355
 356    if (q.flags.q.explicit_offset || q.flags.q.explicit_xfb_offset)
 357       this->offset = q.offset;
 358
 359    if (q.precision != ast_precision_none)
 360       this->precision = q.precision;
 361
 362    if (q.flags.q.explicit_image_format) {
 363       this->image_format = q.image_format;
 364       this->image_base_type = q.image_base_type;
 365    }
 366
 367    return true;
 368 }
 369
 370 bool
 371 ast_type_qualifier::merge_out_qualifier(YYLTYPE *loc,
 372                                         _mesa_glsl_parse_state *state,
 373                                         const ast_type_qualifier &q,
 374                                         ast_node* &node, bool create_node)
 375 {
 376    const bool r = this->merge_qualifier(loc, state, q, false);
 377    ast_type_qualifier valid_out_mask;
 378    valid_out_mask.flags.i = 0;
 379
 380    if (state->stage == MESA_SHADER_GEOMETRY) {
 381       if (q.flags.q.prim_type) {
 382          /* Make sure this is a valid output primitive type. */
 383          switch (q.prim_type) {
 384          case GL_POINTS:
 385          case GL_LINE_STRIP:
 386          case GL_TRIANGLE_STRIP:
 387             break;
 388          default:
 389             _mesa_glsl_error(loc, state, "invalid geometry shader output "
 390                              "primitive type");
 391             break;
 392          }
 393       }
 394
 395       /* Allow future assigments of global out's stream id value */
 396       this->flags.q.explicit_stream = 0;
 397
 398       valid_out_mask.flags.q.stream = 1;
 399       valid_out_mask.flags.q.explicit_stream = 1;
 400       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 401       valid_out_mask.flags.q.xfb_buffer = 1;
 402       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 403       valid_out_mask.flags.q.xfb_stride = 1;
 404       valid_out_mask.flags.q.max_vertices = 1;
 405       valid_out_mask.flags.q.prim_type = 1;
 406    } else if (state->stage == MESA_SHADER_TESS_CTRL) {
 407       if (create_node) {
 408          node = new(state->linalloc) ast_tcs_output_layout(*loc);
 409       }
 410       valid_out_mask.flags.q.vertices = 1;
 411       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 412       valid_out_mask.flags.q.xfb_buffer = 1;
 413       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 414       valid_out_mask.flags.q.xfb_stride = 1;
 415    } else if (state->stage == MESA_SHADER_TESS_EVAL ||
 416               state->stage == MESA_SHADER_VERTEX) {
 417       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 418       valid_out_mask.flags.q.xfb_buffer = 1;
 419       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 420       valid_out_mask.flags.q.xfb_stride = 1;
 421    } else if (state->stage == MESA_SHADER_FRAGMENT) {
 422       valid_out_mask.flags.q.blend_support = 1;
 423    } else {
 424       _mesa_glsl_error(loc, state, "out layout qualifiers only valid in "
 425                        "geometry, tessellation and vertex shaders");
 426       return false;
 427    }
 428
 429    /* Allow future assigments of global out's */
 430    this->flags.q.explicit_xfb_buffer = 0;
 431    this->flags.q.explicit_xfb_stride = 0;
 432
 433    /* Generate an error when invalid input layout qualifiers are used. */
 434    if ((q.flags.i & ~valid_out_mask.flags.i) != 0) {
 435       _mesa_glsl_error(loc, state, "invalid output layout qualifiers used");
 436       return false;
 437    }
 438
 439    return r;
 440 }
 441
 442 bool
 443 ast_type_qualifier::merge_in_qualifier(YYLTYPE *loc,
 444                                        _mesa_glsl_parse_state *state,
 445                                        const ast_type_qualifier &q,
 446                                        ast_node* &node, bool create_node)
 447 {
 448    void *lin_ctx = state->linalloc;
 449    bool create_gs_ast = false;
 450    bool create_cs_ast = false;
 451    ast_type_qualifier valid_in_mask;
 452    valid_in_mask.flags.i = 0;
 453
 454    switch (state->stage) {
 455    case MESA_SHADER_TESS_EVAL:
 456       if (q.flags.q.prim_type) {
 457          /* Make sure this is a valid input primitive type. */
 458          switch (q.prim_type) {
 459          case GL_TRIANGLES:
 460          case GL_QUADS:
 461          case GL_ISOLINES:
 462             break;
 463          default:
 464             _mesa_glsl_error(loc, state,
 465                              "invalid tessellation evaluation "
 466                              "shader input primitive type");
 467             break;
 468          }
 469       }
 470
 471       valid_in_mask.flags.q.prim_type = 1;
 472       valid_in_mask.flags.q.vertex_spacing = 1;
 473       valid_in_mask.flags.q.ordering = 1;
 474       valid_in_mask.flags.q.point_mode = 1;
 475       break;
 476    case MESA_SHADER_GEOMETRY:
 477       if (q.flags.q.prim_type) {
 478          /* Make sure this is a valid input primitive type. */
 479          switch (q.prim_type) {
 480          case GL_POINTS:
 481          case GL_LINES:
 482          case GL_LINES_ADJACENCY:
 483          case GL_TRIANGLES:
 484          case GL_TRIANGLES_ADJACENCY:
 485             break;
 486          default:
 487             _mesa_glsl_error(loc, state,
 488                              "invalid geometry shader input primitive type");
 489             break;
 490          }
 491       }
 492
 493       create_gs_ast |=
 494          q.flags.q.prim_type &&
 495          !state->in_qualifier->flags.q.prim_type;
 496
 497       valid_in_mask.flags.q.prim_type = 1;
 498       valid_in_mask.flags.q.invocations = 1;
 499       break;
 500    case MESA_SHADER_FRAGMENT:
 501       valid_in_mask.flags.q.early_fragment_tests = 1;
 502       break;
 503    case MESA_SHADER_COMPUTE:
 504       create_cs_ast |=
 505          q.flags.q.local_size != 0 &&
 506          state->in_qualifier->flags.q.local_size == 0;
 507
 508       valid_in_mask.flags.q.local_size = 7;
 509       valid_in_mask.flags.q.local_size_variable = 1;
 510       break;
 511    default:
 512       _mesa_glsl_error(loc, state,
 513                        "input layout qualifiers only valid in "
 514                        "geometry, fragment and compute shaders");
 515       break;
 516    }
 517
 518    /* Generate an error when invalid input layout qualifiers are used. */
 519    if ((q.flags.i & ~valid_in_mask.flags.i) != 0) {
 520       _mesa_glsl_error(loc, state, "invalid input layout qualifiers used");
 521       return false;
 522    }
 523
 524    /* Input layout qualifiers can be specified multiple
 525     * times in separate declarations, as long as they match.
 526     */
 527    if (this->flags.q.prim_type) {
 528       if (q.flags.q.prim_type &&
 529           this->prim_type != q.prim_type) {
 530          _mesa_glsl_error(loc, state,
 531                           "conflicting input primitive %s specified",
 532                           state->stage == MESA_SHADER_GEOMETRY ?
 533                           "type" : "mode");
 534       }
 535    } else if (q.flags.q.prim_type) {
 536       state->in_qualifier->flags.q.prim_type = 1;
 537       state->in_qualifier->prim_type = q.prim_type;
 538    }
 539
 540    if (q.flags.q.invocations) {
 541       this->flags.q.invocations = 1;
 542       if (this->invocations) {
 543          this->invocations->merge_qualifier(q.invocations);
 544       } else {
 545          this->invocations = q.invocations;
 546       }
 547    }
 548
 549    if (q.flags.q.early_fragment_tests) {
 550       state->fs_early_fragment_tests = true;
 551    }
 552
 553    if (this->flags.q.vertex_spacing) {
 554       if (q.flags.q.vertex_spacing &&
 555           this->vertex_spacing != q.vertex_spacing) {
 556          _mesa_glsl_error(loc, state,
 557                           "conflicting vertex spacing specified");
 558       }
 559    } else if (q.flags.q.vertex_spacing) {
 560       this->flags.q.vertex_spacing = 1;
 561       this->vertex_spacing = q.vertex_spacing;
 562    }
 563
 564    if (this->flags.q.ordering) {
 565       if (q.flags.q.ordering &&
 566           this->ordering != q.ordering) {
 567          _mesa_glsl_error(loc, state,
 568                           "conflicting ordering specified");
 569       }
 570    } else if (q.flags.q.ordering) {
 571       this->flags.q.ordering = 1;
 572       this->ordering = q.ordering;
 573    }
 574
 575    if (this->flags.q.point_mode) {
 576       if (q.flags.q.point_mode &&
 577           this->point_mode != q.point_mode) {
 578          _mesa_glsl_error(loc, state,
 579                           "conflicting point mode specified");
 580       }
 581    } else if (q.flags.q.point_mode) {
 582       this->flags.q.point_mode = 1;
 583       this->point_mode = q.point_mode;
 584    }
 585
 586    if (q.flags.q.local_size_variable) {
 587       state->cs_input_local_size_variable_specified = true;
 588    }
 589
 590    if (create_node) {
 591       if (create_gs_ast) {
 592          node = new(lin_ctx) ast_gs_input_layout(*loc, q.prim_type);
 593       } else if (create_cs_ast) {
 594          node = new(lin_ctx) ast_cs_input_layout(*loc, q.local_size);
 595       }
 596    }
 597
 598    return true;
 599 }
 600
 601 /**
 602  * Check if the current type qualifier has any illegal flags.
 603  *
 604  * If so, print an error message, followed by a list of illegal flags.
 605  *
 606  * \param message        The error message to print.
 607  * \param allowed_flags  A list of valid flags.
 608  */
 609 bool
 610 ast_type_qualifier::validate_flags(YYLTYPE *loc,
 611                                    _mesa_glsl_parse_state *state,
 612                                    const ast_type_qualifier &allowed_flags,
 613                                    const char *message, const char *name)
 614 {
 615    ast_type_qualifier bad;
 616    bad.flags.i = this->flags.i & ~allowed_flags.flags.i;
 617    if (bad.flags.i == 0)
 618       return true;
 619
 620    _mesa_glsl_error(loc, state,
 621                     "%s '%s':"
 622                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
 623                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
 624                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
 625                     message, name,
 626                     bad.flags.q.invariant ? " invariant" : "",
 627                     bad.flags.q.precise ? " precise" : "",
 628                     bad.flags.q.constant ? " constant" : "",
 629                     bad.flags.q.attribute ? " attribute" : "",
 630                     bad.flags.q.varying ? " varying" : "",
 631                     bad.flags.q.in ? " in" : "",
 632                     bad.flags.q.out ? " out" : "",
 633                     bad.flags.q.centroid ? " centroid" : "",
 634                     bad.flags.q.sample ? " sample" : "",
 635                     bad.flags.q.patch ? " patch" : "",
 636                     bad.flags.q.uniform ? " uniform" : "",
 637                     bad.flags.q.buffer ? " buffer" : "",
 638                     bad.flags.q.shared_storage ? " shared_storage" : "",
 639                     bad.flags.q.smooth ? " smooth" : "",
 640                     bad.flags.q.flat ? " flat" : "",
 641                     bad.flags.q.noperspective ? " noperspective" : "",
 642                     bad.flags.q.origin_upper_left ? " origin_upper_left" : "",
 643                     bad.flags.q.pixel_center_integer ? " pixel_center_integer" : "",
 644                     bad.flags.q.explicit_align ? " align" : "",
 645                     bad.flags.q.explicit_component ? " component" : "",
 646                     bad.flags.q.explicit_location ? " location" : "",
 647                     bad.flags.q.explicit_index ? " index" : "",
 648                     bad.flags.q.explicit_binding ? " binding" : "",
 649                     bad.flags.q.explicit_offset ? " offset" : "",
 650                     bad.flags.q.depth_any ? " depth_any" : "",
 651                     bad.flags.q.depth_greater ? " depth_greater" : "",
 652                     bad.flags.q.depth_less ? " depth_less" : "",
 653                     bad.flags.q.depth_unchanged ? " depth_unchanged" : "",
 654                     bad.flags.q.std140 ? " std140" : "",
 655                     bad.flags.q.std430 ? " std430" : "",
 656                     bad.flags.q.shared ? " shared" : "",
 657                     bad.flags.q.packed ? " packed" : "",
 658                     bad.flags.q.column_major ? " column_major" : "",
 659                     bad.flags.q.row_major ? " row_major" : "",
 660                     bad.flags.q.prim_type ? " prim_type" : "",
 661                     bad.flags.q.max_vertices ? " max_vertices" : "",
 662                     bad.flags.q.local_size ? " local_size" : "",
 663                     bad.flags.q.local_size_variable ? " local_size_variable" : "",
 664                     bad.flags.q.early_fragment_tests ? " early_fragment_tests" : "",
 665                     bad.flags.q.explicit_image_format ? " image_format" : "",
 666                     bad.flags.q.coherent ? " coherent" : "",
 667                     bad.flags.q._volatile ? " _volatile" : "",
 668                     bad.flags.q.restrict_flag ? " restrict_flag" : "",
 669                     bad.flags.q.read_only ? " read_only" : "",
 670                     bad.flags.q.write_only ? " write_only" : "",
 671                     bad.flags.q.invocations ? " invocations" : "",
 672                     bad.flags.q.stream ? " stream" : "",
 673                     bad.flags.q.explicit_stream ? " stream" : "",
 674                     bad.flags.q.explicit_xfb_offset ? " xfb_offset" : "",
 675                     bad.flags.q.xfb_buffer ? " xfb_buffer" : "",
 676                     bad.flags.q.explicit_xfb_buffer ? " xfb_buffer" : "",
 677                     bad.flags.q.xfb_stride ? " xfb_stride" : "",
 678                     bad.flags.q.explicit_xfb_stride ? " xfb_stride" : "",
 679                     bad.flags.q.vertex_spacing ? " vertex_spacing" : "",
 680                     bad.flags.q.ordering ? " ordering" : "",
 681                     bad.flags.q.point_mode ? " point_mode" : "",
 682                     bad.flags.q.vertices ? " vertices" : "",
 683                     bad.flags.q.subroutine ? " subroutine" : "",
 684                     bad.flags.q.subroutine_def ? " subroutine_def" : "");
 685    return false;
 686 }
 687
 688 bool
 689 ast_layout_expression::process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 690                                                   const char *qual_indentifier,
 691                                                   unsigned *value,
 692                                                   bool can_be_zero,
 693                                                   bool must_match)
 694 {
 695    int min_value = 0;
 696    bool first_pass = true;
 697    *value = 0;
 698
 699    if (!can_be_zero)
 700       min_value = 1;
 701
 702    for (exec_node *node = layout_const_expressions.get_head_raw();
 703         !node->is_tail_sentinel(); node = node->next) {
 704
 705       exec_list dummy_instructions;
 706       ast_node *const_expression = exec_node_data(ast_node, node, link);
 707
 708       ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 709
 710       ir_constant *const const_int = ir->constant_expression_value();
 711       if (const_int == NULL || !const_int->type->is_integer()) {
 712          YYLTYPE loc = const_expression->get_location();
 713          _mesa_glsl_error(&loc, state, "%s must be an integral constant "
 714                           "expression", qual_indentifier);
 715          return false;
 716       }
 717
 718       if (const_int->value.i[0] < min_value) {
 719          YYLTYPE loc = const_expression->get_location();
 720          _mesa_glsl_error(&loc, state, "%s layout qualifier is invalid "
 721                           "(%d < %d)", qual_indentifier,
 722                           const_int->value.i[0], min_value);
 723          return false;
 724       }
 725
 726       /* From section 4.4 "Layout Qualifiers" of the GLSL 4.50 spec:
 727        * "When the same layout-qualifier-name occurs multiple times,
 728        *  in a single declaration, the last occurrence overrides the
 729        *  former occurrence(s)."
 730        */
 731       if (!first_pass) {
 732          if ((must_match || !state->has_420pack()) && *value != const_int->value.u[0]) {
 733             YYLTYPE loc = const_expression->get_location();
 734             _mesa_glsl_error(&loc, state, "%s layout qualifier does not "
 735                              "match previous declaration (%d vs %d)",
 736                              qual_indentifier, *value, const_int->value.i[0]);
 737             return false;
 738          }
 739       } else {
 740          first_pass = false;
 741          *value = const_int->value.u[0];
 742       }
 743
 744       /* If the location is const (and we've verified that
 745        * it is) then no instructions should have been emitted
 746        * when we converted it to HIR. If they were emitted,
 747        * then either the location isn't const after all, or
 748        * we are emitting unnecessary instructions.
 749        */
 750       assert(dummy_instructions.is_empty());
 751    }
 752
 753    return true;
 754 }
 755
 756 bool
 757 process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 758                            YYLTYPE *loc,
 759                            const char *qual_indentifier,
 760                            ast_expression *const_expression,
 761                            unsigned *value)
 762 {
 763    exec_list dummy_instructions;
 764
 765    if (const_expression == NULL) {
 766       *value = 0;
 767       return true;
 768    }
 769
 770    ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 771
 772    ir_constant *const const_int = ir->constant_expression_value();
 773    if (const_int == NULL || !const_int->type->is_integer()) {
 774       _mesa_glsl_error(loc, state, "%s must be an integral constant "
 775                        "expression", qual_indentifier);
 776       return false;
 777    }
 778
 779    if (const_int->value.i[0] < 0) {
 780       _mesa_glsl_error(loc, state, "%s layout qualifier is invalid (%d < 0)",
 781                        qual_indentifier, const_int->value.u[0]);
 782       return false;
 783    }
 784
 785    /* If the location is const (and we've verified that
 786     * it is) then no instructions should have been emitted
 787     * when we converted it to HIR. If they were emitted,
 788     * then either the location isn't const after all, or
 789     * we are emitting unnecessary instructions.
 790     */
 791    assert(dummy_instructions.is_empty());
 792
 793    *value = const_int->value.u[0];
 794    return true;
 795 }