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    if (state->has_explicit_uniform_location()) {
  48       subroutine_only.flags.q.explicit_index = 1;
  49    }
  50    return (this->qualifier.flags.i & ~subroutine_only.flags.i) != 0;
  51 }
  52
  53 bool ast_type_qualifier::has_interpolation() const
  54 {
  55    return this->flags.q.smooth
  56           || this->flags.q.flat
  57           || this->flags.q.noperspective;
  58 }
  59
  60 bool
  61 ast_type_qualifier::has_layout() const
  62 {
  63    return this->flags.q.origin_upper_left
  64           || this->flags.q.pixel_center_integer
  65           || this->flags.q.depth_type
  66           || this->flags.q.std140
  67           || this->flags.q.std430
  68           || this->flags.q.shared
  69           || this->flags.q.column_major
  70           || this->flags.q.row_major
  71           || this->flags.q.packed
  72           || this->flags.q.explicit_align
  73           || this->flags.q.explicit_component
  74           || this->flags.q.explicit_location
  75           || this->flags.q.explicit_image_format
  76           || this->flags.q.explicit_index
  77           || this->flags.q.explicit_binding
  78           || this->flags.q.explicit_offset
  79           || this->flags.q.explicit_stream
  80           || this->flags.q.explicit_xfb_buffer
  81           || this->flags.q.explicit_xfb_offset
  82           || this->flags.q.explicit_xfb_stride;
  83 }
  84
  85 bool
  86 ast_type_qualifier::has_storage() const
  87 {
  88    return this->flags.q.constant
  89           || this->flags.q.attribute
  90           || this->flags.q.varying
  91           || this->flags.q.in
  92           || this->flags.q.out
  93           || this->flags.q.uniform
  94           || this->flags.q.buffer
  95           || this->flags.q.shared_storage;
  96 }
  97
  98 bool
  99 ast_type_qualifier::has_auxiliary_storage() const
 100 {
 101    return this->flags.q.centroid
 102           || this->flags.q.sample
 103           || this->flags.q.patch;
 104 }
 105
 106 bool ast_type_qualifier::has_memory() const
 107 {
 108    return this->flags.q.coherent
 109           || this->flags.q._volatile
 110           || this->flags.q.restrict_flag
 111           || this->flags.q.read_only
 112           || this->flags.q.write_only;
 113 }
 114
 115 static bool
 116 validate_prim_type(YYLTYPE *loc,
 117                    _mesa_glsl_parse_state *state,
 118                    const ast_type_qualifier &qualifier,
 119                    const ast_type_qualifier &new_qualifier)
 120 {
 121    /* Input layout qualifiers can be specified multiple
 122     * times in separate declarations, as long as they match.
 123     */
 124    if (qualifier.flags.q.prim_type && new_qualifier.flags.q.prim_type
 125        && qualifier.prim_type != new_qualifier.prim_type) {
 126       _mesa_glsl_error(loc, state,
 127                        "conflicting input primitive %s specified",
 128                        state->stage == MESA_SHADER_GEOMETRY ?
 129                        "type" : "mode");
 130       return false;
 131    }
 132
 133    return true;
 134 }
 135
 136 static bool
 137 validate_vertex_spacing(YYLTYPE *loc,
 138                         _mesa_glsl_parse_state *state,
 139                         const ast_type_qualifier &qualifier,
 140                         const ast_type_qualifier &new_qualifier)
 141 {
 142    if (qualifier.flags.q.vertex_spacing && new_qualifier.flags.q.vertex_spacing
 143        && qualifier.vertex_spacing != new_qualifier.vertex_spacing) {
 144       _mesa_glsl_error(loc, state,
 145                        "conflicting vertex spacing specified");
 146       return false;
 147    }
 148
 149    return true;
 150 }
 151
 152 static bool
 153 validate_ordering(YYLTYPE *loc,
 154                   _mesa_glsl_parse_state *state,
 155                   const ast_type_qualifier &qualifier,
 156                   const ast_type_qualifier &new_qualifier)
 157 {
 158    if (qualifier.flags.q.ordering && new_qualifier.flags.q.ordering
 159        && qualifier.ordering != new_qualifier.ordering) {
 160       _mesa_glsl_error(loc, state,
 161                        "conflicting ordering specified");
 162       return false;
 163    }
 164
 165    return true;
 166 }
 167
 168 static bool
 169 validate_point_mode(MAYBE_UNUSED const ast_type_qualifier &qualifier,
 170                     MAYBE_UNUSED const ast_type_qualifier &new_qualifier)
 171 {
 172    /* Point mode can only be true if the flag is set. */
 173    assert (!qualifier.flags.q.point_mode || !new_qualifier.flags.q.point_mode
 174            || (qualifier.point_mode && new_qualifier.point_mode));
 175
 176    return true;
 177 }
 178
 179 /**
 180  * This function merges duplicate layout identifiers.
 181  *
 182  * It deals with duplicates within a single layout qualifier, among multiple
 183  * layout qualifiers on a single declaration and on several declarations for
 184  * the same variable.
 185  *
 186  * The is_single_layout_merge and is_multiple_layouts_merge parameters are
 187  * used to differentiate among them.
 188  */
 189 bool
 190 ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
 191                                     _mesa_glsl_parse_state *state,
 192                                     const ast_type_qualifier &q,
 193                                     bool is_single_layout_merge,
 194                                     bool is_multiple_layouts_merge)
 195 {
 196    bool r = true;
 197    ast_type_qualifier ubo_mat_mask;
 198    ubo_mat_mask.flags.i = 0;
 199    ubo_mat_mask.flags.q.row_major = 1;
 200    ubo_mat_mask.flags.q.column_major = 1;
 201
 202    ast_type_qualifier ubo_layout_mask;
 203    ubo_layout_mask.flags.i = 0;
 204    ubo_layout_mask.flags.q.std140 = 1;
 205    ubo_layout_mask.flags.q.packed = 1;
 206    ubo_layout_mask.flags.q.shared = 1;
 207    ubo_layout_mask.flags.q.std430 = 1;
 208
 209    ast_type_qualifier ubo_binding_mask;
 210    ubo_binding_mask.flags.i = 0;
 211    ubo_binding_mask.flags.q.explicit_binding = 1;
 212    ubo_binding_mask.flags.q.explicit_offset = 1;
 213
 214    ast_type_qualifier stream_layout_mask;
 215    stream_layout_mask.flags.i = 0;
 216    stream_layout_mask.flags.q.stream = 1;
 217
 218    /* FIXME: We should probably do interface and function param validation
 219     * separately.
 220     */
 221    ast_type_qualifier input_layout_mask;
 222    input_layout_mask.flags.i = 0;
 223    input_layout_mask.flags.q.centroid = 1;
 224    /* Function params can have constant */
 225    input_layout_mask.flags.q.constant = 1;
 226    input_layout_mask.flags.q.explicit_component = 1;
 227    input_layout_mask.flags.q.explicit_location = 1;
 228    input_layout_mask.flags.q.flat = 1;
 229    input_layout_mask.flags.q.in = 1;
 230    input_layout_mask.flags.q.invariant = 1;
 231    input_layout_mask.flags.q.noperspective = 1;
 232    input_layout_mask.flags.q.origin_upper_left = 1;
 233    /* Function params 'inout' will set this */
 234    input_layout_mask.flags.q.out = 1;
 235    input_layout_mask.flags.q.patch = 1;
 236    input_layout_mask.flags.q.pixel_center_integer = 1;
 237    input_layout_mask.flags.q.precise = 1;
 238    input_layout_mask.flags.q.sample = 1;
 239    input_layout_mask.flags.q.smooth = 1;
 240
 241    /* Uniform block layout qualifiers get to overwrite each
 242     * other (rightmost having priority), while all other
 243     * qualifiers currently don't allow duplicates.
 244     */
 245    ast_type_qualifier allowed_duplicates_mask;
 246    allowed_duplicates_mask.flags.i =
 247       ubo_mat_mask.flags.i |
 248       ubo_layout_mask.flags.i |
 249       ubo_binding_mask.flags.i;
 250
 251    /* Geometry shaders can have several layout qualifiers
 252     * assigning different stream values.
 253     */
 254    if (state->stage == MESA_SHADER_GEOMETRY) {
 255       allowed_duplicates_mask.flags.i |=
 256          stream_layout_mask.flags.i;
 257    }
 258
 259    if (is_single_layout_merge && !state->has_enhanced_layouts() &&
 260        (this->flags.i & q.flags.i & ~allowed_duplicates_mask.flags.i) != 0) {
 261       _mesa_glsl_error(loc, state, "duplicate layout qualifiers used");
 262       return false;
 263    }
 264
 265    if (is_multiple_layouts_merge && !state->has_420pack_or_es31()) {
 266       _mesa_glsl_error(loc, state,
 267                        "duplicate layout(...) qualifiers");
 268       return false;
 269    }
 270
 271    if (q.flags.q.prim_type) {
 272       r &= validate_prim_type(loc, state, *this, q);
 273       this->flags.q.prim_type = 1;
 274       this->prim_type = q.prim_type;
 275    }
 276
 277    if (q.flags.q.max_vertices) {
 278       if (this->flags.q.max_vertices
 279           && !is_single_layout_merge && !is_multiple_layouts_merge) {
 280          this->max_vertices->merge_qualifier(q.max_vertices);
 281       } else {
 282          this->flags.q.max_vertices = 1;
 283          this->max_vertices = q.max_vertices;
 284       }
 285    }
 286
 287    if (q.subroutine_list) {
 288       if (this->subroutine_list) {
 289          _mesa_glsl_error(loc, state,
 290                           "conflicting subroutine qualifiers used");
 291       } else {
 292          this->subroutine_list = q.subroutine_list;
 293       }
 294    }
 295
 296    if (q.flags.q.invocations) {
 297       if (this->flags.q.invocations
 298           && !is_single_layout_merge && !is_multiple_layouts_merge) {
 299          this->invocations->merge_qualifier(q.invocations);
 300       } else {
 301          this->flags.q.invocations = 1;
 302          this->invocations = q.invocations;
 303       }
 304    }
 305
 306    if (state->stage == MESA_SHADER_GEOMETRY &&
 307        state->has_explicit_attrib_stream()) {
 308       if (!this->flags.q.explicit_stream) {
 309          if (q.flags.q.stream) {
 310             this->flags.q.stream = 1;
 311             this->stream = q.stream;
 312          } else if (!this->flags.q.stream && this->flags.q.out &&
 313                     !this->flags.q.in) {
 314             /* Assign default global stream value */
 315             this->flags.q.stream = 1;
 316             this->stream = state->out_qualifier->stream;
 317          }
 318       }
 319    }
 320
 321    if (state->has_enhanced_layouts()) {
 322       if (!this->flags.q.explicit_xfb_buffer) {
 323          if (q.flags.q.xfb_buffer) {
 324             this->flags.q.xfb_buffer = 1;
 325             this->xfb_buffer = q.xfb_buffer;
 326          } else if (!this->flags.q.xfb_buffer && this->flags.q.out &&
 327                     !this->flags.q.in) {
 328             /* Assign global xfb_buffer value */
 329             this->flags.q.xfb_buffer = 1;
 330             this->xfb_buffer = state->out_qualifier->xfb_buffer;
 331          }
 332       }
 333
 334       if (q.flags.q.explicit_xfb_stride) {
 335          this->flags.q.xfb_stride = 1;
 336          this->flags.q.explicit_xfb_stride = 1;
 337          this->xfb_stride = q.xfb_stride;
 338       }
 339    }
 340
 341    if (q.flags.q.vertices) {
 342       if (this->flags.q.vertices
 343           && !is_single_layout_merge && !is_multiple_layouts_merge) {
 344          this->vertices->merge_qualifier(q.vertices);
 345       } else {
 346          this->flags.q.vertices = 1;
 347          this->vertices = q.vertices;
 348       }
 349    }
 350
 351    if (q.flags.q.vertex_spacing) {
 352       r &= validate_vertex_spacing(loc, state, *this, q);
 353       this->flags.q.vertex_spacing = 1;
 354       this->vertex_spacing = q.vertex_spacing;
 355    }
 356
 357    if (q.flags.q.ordering) {
 358       r &= validate_ordering(loc, state, *this, q);
 359       this->flags.q.ordering = 1;
 360       this->ordering = q.ordering;
 361    }
 362
 363    if (q.flags.q.point_mode) {
 364       r &= validate_point_mode(*this, q);
 365       this->flags.q.point_mode = 1;
 366       this->point_mode = q.point_mode;
 367    }
 368
 369    if (q.flags.q.early_fragment_tests)
 370       this->flags.q.early_fragment_tests = true;
 371
 372    if ((q.flags.i & ubo_mat_mask.flags.i) != 0)
 373       this->flags.i &= ~ubo_mat_mask.flags.i;
 374    if ((q.flags.i & ubo_layout_mask.flags.i) != 0)
 375       this->flags.i &= ~ubo_layout_mask.flags.i;
 376
 377    for (int i = 0; i < 3; i++) {
 378       if (q.flags.q.local_size & (1 << i)) {
 379          if (this->local_size[i]
 380              && !is_single_layout_merge && !is_multiple_layouts_merge) {
 381             this->local_size[i]->merge_qualifier(q.local_size[i]);
 382          } else {
 383             this->local_size[i] = q.local_size[i];
 384          }
 385       }
 386    }
 387
 388    if (q.flags.q.local_size_variable)
 389       this->flags.q.local_size_variable = true;
 390
 391    this->flags.i |= q.flags.i;
 392
 393    if (this->flags.q.in &&
 394        (this->flags.i & ~input_layout_mask.flags.i) != 0) {
 395       _mesa_glsl_error(loc, state, "invalid input layout qualifier used");
 396       return false;
 397    }
 398
 399    if (q.flags.q.explicit_align)
 400       this->align = q.align;
 401
 402    if (q.flags.q.explicit_location)
 403       this->location = q.location;
 404
 405    if (q.flags.q.explicit_index)
 406       this->index = q.index;
 407
 408   if (q.flags.q.explicit_component)
 409       this->component = q.component;
 410
 411    if (q.flags.q.explicit_binding)
 412       this->binding = q.binding;
 413
 414    if (q.flags.q.explicit_offset || q.flags.q.explicit_xfb_offset)
 415       this->offset = q.offset;
 416
 417    if (q.precision != ast_precision_none)
 418       this->precision = q.precision;
 419
 420    if (q.flags.q.explicit_image_format) {
 421       this->image_format = q.image_format;
 422       this->image_base_type = q.image_base_type;
 423    }
 424
 425    return r;
 426 }
 427
 428 bool
 429 ast_type_qualifier::validate_out_qualifier(YYLTYPE *loc,
 430                                            _mesa_glsl_parse_state *state)
 431 {
 432    bool r = true;
 433    ast_type_qualifier valid_out_mask;
 434    valid_out_mask.flags.i = 0;
 435
 436    switch (state->stage) {
 437    case MESA_SHADER_GEOMETRY:
 438       if (this->flags.q.prim_type) {
 439          /* Make sure this is a valid output primitive type. */
 440          switch (this->prim_type) {
 441          case GL_POINTS:
 442          case GL_LINE_STRIP:
 443          case GL_TRIANGLE_STRIP:
 444             break;
 445          default:
 446             r = false;
 447             _mesa_glsl_error(loc, state, "invalid geometry shader output "
 448                              "primitive type");
 449             break;
 450          }
 451       }
 452
 453       valid_out_mask.flags.q.stream = 1;
 454       valid_out_mask.flags.q.explicit_stream = 1;
 455       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 456       valid_out_mask.flags.q.xfb_buffer = 1;
 457       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 458       valid_out_mask.flags.q.xfb_stride = 1;
 459       valid_out_mask.flags.q.max_vertices = 1;
 460       valid_out_mask.flags.q.prim_type = 1;
 461       break;
 462    case MESA_SHADER_TESS_CTRL:
 463       valid_out_mask.flags.q.vertices = 1;
 464       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 465       valid_out_mask.flags.q.xfb_buffer = 1;
 466       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 467       valid_out_mask.flags.q.xfb_stride = 1;
 468       break;
 469    case MESA_SHADER_TESS_EVAL:
 470    case MESA_SHADER_VERTEX:
 471       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 472       valid_out_mask.flags.q.xfb_buffer = 1;
 473       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 474       valid_out_mask.flags.q.xfb_stride = 1;
 475       break;
 476    case MESA_SHADER_FRAGMENT:
 477       valid_out_mask.flags.q.blend_support = 1;
 478       break;
 479    default:
 480       r = false;
 481       _mesa_glsl_error(loc, state,
 482                        "out layout qualifiers only valid in "
 483                        "geometry, tessellation, vertex and fragment shaders");
 484    }
 485
 486    /* Generate an error when invalid output layout qualifiers are used. */
 487    if ((this->flags.i & ~valid_out_mask.flags.i) != 0) {
 488       r = false;
 489       _mesa_glsl_error(loc, state, "invalid output layout qualifiers used");
 490    }
 491
 492    return r;
 493 }
 494
 495 bool
 496 ast_type_qualifier::merge_into_out_qualifier(YYLTYPE *loc,
 497                                              _mesa_glsl_parse_state *state,
 498                                              ast_node* &node)
 499 {
 500    const bool r = state->out_qualifier->merge_qualifier(loc, state,
 501                                                         *this, false);
 502
 503    switch (state->stage) {
 504    case MESA_SHADER_GEOMETRY:
 505       /* Allow future assignments of global out's stream id value */
 506       state->out_qualifier->flags.q.explicit_stream = 0;
 507       break;
 508    case MESA_SHADER_TESS_CTRL:
 509       node = new(state->linalloc) ast_tcs_output_layout(*loc);
 510       break;
 511    default:
 512       break;
 513    }
 514
 515    /* Allow future assignments of global out's */
 516    state->out_qualifier->flags.q.explicit_xfb_buffer = 0;
 517    state->out_qualifier->flags.q.explicit_xfb_stride = 0;
 518
 519    return r;
 520 }
 521
 522 bool
 523 ast_type_qualifier::validate_in_qualifier(YYLTYPE *loc,
 524                                           _mesa_glsl_parse_state *state)
 525 {
 526    bool r = true;
 527    ast_type_qualifier valid_in_mask;
 528    valid_in_mask.flags.i = 0;
 529
 530    switch (state->stage) {
 531    case MESA_SHADER_TESS_EVAL:
 532       if (this->flags.q.prim_type) {
 533          /* Make sure this is a valid input primitive type. */
 534          switch (this->prim_type) {
 535          case GL_TRIANGLES:
 536          case GL_QUADS:
 537          case GL_ISOLINES:
 538             break;
 539          default:
 540             r = false;
 541             _mesa_glsl_error(loc, state,
 542                              "invalid tessellation evaluation "
 543                              "shader input primitive type");
 544             break;
 545          }
 546       }
 547
 548       valid_in_mask.flags.q.prim_type = 1;
 549       valid_in_mask.flags.q.vertex_spacing = 1;
 550       valid_in_mask.flags.q.ordering = 1;
 551       valid_in_mask.flags.q.point_mode = 1;
 552       break;
 553    case MESA_SHADER_GEOMETRY:
 554       if (this->flags.q.prim_type) {
 555          /* Make sure this is a valid input primitive type. */
 556          switch (this->prim_type) {
 557          case GL_POINTS:
 558          case GL_LINES:
 559          case GL_LINES_ADJACENCY:
 560          case GL_TRIANGLES:
 561          case GL_TRIANGLES_ADJACENCY:
 562             break;
 563          default:
 564             r = false;
 565             _mesa_glsl_error(loc, state,
 566                              "invalid geometry shader input primitive type");
 567             break;
 568          }
 569       }
 570
 571       valid_in_mask.flags.q.prim_type = 1;
 572       valid_in_mask.flags.q.invocations = 1;
 573       break;
 574    case MESA_SHADER_FRAGMENT:
 575       valid_in_mask.flags.q.early_fragment_tests = 1;
 576       valid_in_mask.flags.q.inner_coverage = 1;
 577       valid_in_mask.flags.q.post_depth_coverage = 1;
 578       break;
 579    case MESA_SHADER_COMPUTE:
 580       valid_in_mask.flags.q.local_size = 7;
 581       valid_in_mask.flags.q.local_size_variable = 1;
 582       break;
 583    default:
 584       r = false;
 585       _mesa_glsl_error(loc, state,
 586                        "input layout qualifiers only valid in "
 587                        "geometry, tessellation, fragment and compute shaders");
 588       break;
 589    }
 590
 591    /* Generate an error when invalid input layout qualifiers are used. */
 592    if ((this->flags.i & ~valid_in_mask.flags.i) != 0) {
 593       r = false;
 594       _mesa_glsl_error(loc, state, "invalid input layout qualifiers used");
 595    }
 596
 597    /* The checks below are also performed when merging but we want to spit an
 598     * error against the default global input qualifier as soon as we can, with
 599     * the closest error location in the shader.
 600     */
 601    r &= validate_prim_type(loc, state, *state->in_qualifier, *this);
 602    r &= validate_vertex_spacing(loc, state, *state->in_qualifier, *this);
 603    r &= validate_ordering(loc, state, *state->in_qualifier, *this);
 604    r &= validate_point_mode(*state->in_qualifier, *this);
 605
 606    return r;
 607 }
 608
 609 bool
 610 ast_type_qualifier::merge_into_in_qualifier(YYLTYPE *loc,
 611                                             _mesa_glsl_parse_state *state,
 612                                             ast_node* &node)
 613 {
 614    bool r = true;
 615    void *lin_ctx = state->linalloc;
 616
 617    /* We create the gs_input_layout node before merging so, in the future, no
 618     * more repeated nodes will be created as we will have the flag set.
 619     */
 620    if (state->stage == MESA_SHADER_GEOMETRY
 621        && this->flags.q.prim_type && !state->in_qualifier->flags.q.prim_type) {
 622       node = new(lin_ctx) ast_gs_input_layout(*loc, this->prim_type);
 623    }
 624
 625    r = state->in_qualifier->merge_qualifier(loc, state, *this, false);
 626
 627    if (state->in_qualifier->flags.q.early_fragment_tests) {
 628       state->fs_early_fragment_tests = true;
 629       state->in_qualifier->flags.q.early_fragment_tests = false;
 630    }
 631
 632    if (state->in_qualifier->flags.q.inner_coverage) {
 633       state->fs_inner_coverage = true;
 634       state->in_qualifier->flags.q.inner_coverage = false;
 635    }
 636
 637    if (state->in_qualifier->flags.q.post_depth_coverage) {
 638       state->fs_post_depth_coverage = true;
 639       state->in_qualifier->flags.q.post_depth_coverage = false;
 640    }
 641
 642    if (state->fs_inner_coverage && state->fs_post_depth_coverage) {
 643       _mesa_glsl_error(loc, state,
 644                        "inner_coverage & post_depth_coverage layout qualifiers "
 645                        "are mutally exclusives");
 646       r = false;
 647    }
 648
 649    /* We allow the creation of multiple cs_input_layout nodes. Coherence among
 650     * all existing nodes is checked later, when the AST node is transformed
 651     * into HIR.
 652     */
 653    if (state->in_qualifier->flags.q.local_size) {
 654       node = new(lin_ctx) ast_cs_input_layout(*loc,
 655                                               state->in_qualifier->local_size);
 656       state->in_qualifier->flags.q.local_size = 0;
 657       for (int i = 0; i < 3; i++)
 658          state->in_qualifier->local_size[i] = NULL;
 659    }
 660
 661    if (state->in_qualifier->flags.q.local_size_variable) {
 662       state->cs_input_local_size_variable_specified = true;
 663       state->in_qualifier->flags.q.local_size_variable = false;
 664    }
 665
 666    return r;
 667 }
 668
 669 bool
 670 ast_type_qualifier::push_to_global(YYLTYPE *loc,
 671                                    _mesa_glsl_parse_state *state)
 672 {
 673    if (this->flags.q.xfb_stride) {
 674       this->flags.q.xfb_stride = 0;
 675
 676       unsigned buff_idx;
 677       if (process_qualifier_constant(state, loc, "xfb_buffer",
 678                                      this->xfb_buffer, &buff_idx)) {
 679          if (state->out_qualifier->out_xfb_stride[buff_idx]) {
 680             state->out_qualifier->out_xfb_stride[buff_idx]->merge_qualifier(
 681                new(state->linalloc) ast_layout_expression(*loc,
 682                                                           this->xfb_stride));
 683          } else {
 684             state->out_qualifier->out_xfb_stride[buff_idx] =
 685                new(state->linalloc) ast_layout_expression(*loc,
 686                                                           this->xfb_stride);
 687          }
 688       }
 689    }
 690
 691    return true;
 692 }
 693
 694 /**
 695  * Check if the current type qualifier has any illegal flags.
 696  *
 697  * If so, print an error message, followed by a list of illegal flags.
 698  *
 699  * \param message        The error message to print.
 700  * \param allowed_flags  A list of valid flags.
 701  */
 702 bool
 703 ast_type_qualifier::validate_flags(YYLTYPE *loc,
 704                                    _mesa_glsl_parse_state *state,
 705                                    const ast_type_qualifier &allowed_flags,
 706                                    const char *message, const char *name)
 707 {
 708    ast_type_qualifier bad;
 709    bad.flags.i = this->flags.i & ~allowed_flags.flags.i;
 710    if (bad.flags.i == 0)
 711       return true;
 712
 713    _mesa_glsl_error(loc, state,
 714                     "%s '%s':"
 715                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
 716                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
 717                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
 718                     message, name,
 719                     bad.flags.q.invariant ? " invariant" : "",
 720                     bad.flags.q.precise ? " precise" : "",
 721                     bad.flags.q.constant ? " constant" : "",
 722                     bad.flags.q.attribute ? " attribute" : "",
 723                     bad.flags.q.varying ? " varying" : "",
 724                     bad.flags.q.in ? " in" : "",
 725                     bad.flags.q.out ? " out" : "",
 726                     bad.flags.q.centroid ? " centroid" : "",
 727                     bad.flags.q.sample ? " sample" : "",
 728                     bad.flags.q.patch ? " patch" : "",
 729                     bad.flags.q.uniform ? " uniform" : "",
 730                     bad.flags.q.buffer ? " buffer" : "",
 731                     bad.flags.q.shared_storage ? " shared_storage" : "",
 732                     bad.flags.q.smooth ? " smooth" : "",
 733                     bad.flags.q.flat ? " flat" : "",
 734                     bad.flags.q.noperspective ? " noperspective" : "",
 735                     bad.flags.q.origin_upper_left ? " origin_upper_left" : "",
 736                     bad.flags.q.pixel_center_integer ? " pixel_center_integer" : "",
 737                     bad.flags.q.explicit_align ? " align" : "",
 738                     bad.flags.q.explicit_component ? " component" : "",
 739                     bad.flags.q.explicit_location ? " location" : "",
 740                     bad.flags.q.explicit_index ? " index" : "",
 741                     bad.flags.q.explicit_binding ? " binding" : "",
 742                     bad.flags.q.explicit_offset ? " offset" : "",
 743                     bad.flags.q.depth_type ? " depth_type" : "",
 744                     bad.flags.q.std140 ? " std140" : "",
 745                     bad.flags.q.std430 ? " std430" : "",
 746                     bad.flags.q.shared ? " shared" : "",
 747                     bad.flags.q.packed ? " packed" : "",
 748                     bad.flags.q.column_major ? " column_major" : "",
 749                     bad.flags.q.row_major ? " row_major" : "",
 750                     bad.flags.q.prim_type ? " prim_type" : "",
 751                     bad.flags.q.max_vertices ? " max_vertices" : "",
 752                     bad.flags.q.local_size ? " local_size" : "",
 753                     bad.flags.q.local_size_variable ? " local_size_variable" : "",
 754                     bad.flags.q.early_fragment_tests ? " early_fragment_tests" : "",
 755                     bad.flags.q.explicit_image_format ? " image_format" : "",
 756                     bad.flags.q.coherent ? " coherent" : "",
 757                     bad.flags.q._volatile ? " _volatile" : "",
 758                     bad.flags.q.restrict_flag ? " restrict_flag" : "",
 759                     bad.flags.q.read_only ? " read_only" : "",
 760                     bad.flags.q.write_only ? " write_only" : "",
 761                     bad.flags.q.invocations ? " invocations" : "",
 762                     bad.flags.q.stream ? " stream" : "",
 763                     bad.flags.q.explicit_stream ? " stream" : "",
 764                     bad.flags.q.explicit_xfb_offset ? " xfb_offset" : "",
 765                     bad.flags.q.xfb_buffer ? " xfb_buffer" : "",
 766                     bad.flags.q.explicit_xfb_buffer ? " xfb_buffer" : "",
 767                     bad.flags.q.xfb_stride ? " xfb_stride" : "",
 768                     bad.flags.q.explicit_xfb_stride ? " xfb_stride" : "",
 769                     bad.flags.q.vertex_spacing ? " vertex_spacing" : "",
 770                     bad.flags.q.ordering ? " ordering" : "",
 771                     bad.flags.q.point_mode ? " point_mode" : "",
 772                     bad.flags.q.vertices ? " vertices" : "",
 773                     bad.flags.q.subroutine ? " subroutine" : "",
 774                     bad.flags.q.blend_support ? " blend_support" : "",
 775                     bad.flags.q.inner_coverage ? " inner_coverage" : "",
 776                     bad.flags.q.post_depth_coverage ? " post_depth_coverage" : "");
 777    return false;
 778 }
 779
 780 bool
 781 ast_layout_expression::process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 782                                                   const char *qual_indentifier,
 783                                                   unsigned *value,
 784                                                   bool can_be_zero)
 785 {
 786    int min_value = 0;
 787    bool first_pass = true;
 788    *value = 0;
 789
 790    if (!can_be_zero)
 791       min_value = 1;
 792
 793    for (exec_node *node = layout_const_expressions.get_head_raw();
 794         !node->is_tail_sentinel(); node = node->next) {
 795
 796       exec_list dummy_instructions;
 797       ast_node *const_expression = exec_node_data(ast_node, node, link);
 798
 799       ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 800
 801       ir_constant *const const_int = ir->constant_expression_value();
 802       if (const_int == NULL || !const_int->type->is_integer()) {
 803          YYLTYPE loc = const_expression->get_location();
 804          _mesa_glsl_error(&loc, state, "%s must be an integral constant "
 805                           "expression", qual_indentifier);
 806          return false;
 807       }
 808
 809       if (const_int->value.i[0] < min_value) {
 810          YYLTYPE loc = const_expression->get_location();
 811          _mesa_glsl_error(&loc, state, "%s layout qualifier is invalid "
 812                           "(%d < %d)", qual_indentifier,
 813                           const_int->value.i[0], min_value);
 814          return false;
 815       }
 816
 817       if (!first_pass && *value != const_int->value.u[0]) {
 818          YYLTYPE loc = const_expression->get_location();
 819          _mesa_glsl_error(&loc, state, "%s layout qualifier does not "
 820                           "match previous declaration (%d vs %d)",
 821                           qual_indentifier, *value, const_int->value.i[0]);
 822          return false;
 823       } else {
 824          first_pass = false;
 825          *value = const_int->value.u[0];
 826       }
 827
 828       /* If the location is const (and we've verified that
 829        * it is) then no instructions should have been emitted
 830        * when we converted it to HIR. If they were emitted,
 831        * then either the location isn't const after all, or
 832        * we are emitting unnecessary instructions.
 833        */
 834       assert(dummy_instructions.is_empty());
 835    }
 836
 837    return true;
 838 }
 839
 840 bool
 841 process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 842                            YYLTYPE *loc,
 843                            const char *qual_indentifier,
 844                            ast_expression *const_expression,
 845                            unsigned *value)
 846 {
 847    exec_list dummy_instructions;
 848
 849    if (const_expression == NULL) {
 850       *value = 0;
 851       return true;
 852    }
 853
 854    ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 855
 856    ir_constant *const const_int = ir->constant_expression_value();
 857    if (const_int == NULL || !const_int->type->is_integer()) {
 858       _mesa_glsl_error(loc, state, "%s must be an integral constant "
 859                        "expression", qual_indentifier);
 860       return false;
 861    }
 862
 863    if (const_int->value.i[0] < 0) {
 864       _mesa_glsl_error(loc, state, "%s layout qualifier is invalid (%d < 0)",
 865                        qual_indentifier, const_int->value.u[0]);
 866       return false;
 867    }
 868
 869    /* If the location is const (and we've verified that
 870     * it is) then no instructions should have been emitted
 871     * when we converted it to HIR. If they were emitted,
 872     * then either the location isn't const after all, or
 873     * we are emitting unnecessary instructions.
 874     */
 875    assert(dummy_instructions.is_empty());
 876
 877    *value = const_int->value.u[0];
 878    return true;
 879 }