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 bool ast_type_qualifier::is_subroutine_decl() const
 116 {
 117    return this->flags.q.subroutine && !this->subroutine_list;
 118 }
 119
 120 static bool
 121 validate_prim_type(YYLTYPE *loc,
 122                    _mesa_glsl_parse_state *state,
 123                    const ast_type_qualifier &qualifier,
 124                    const ast_type_qualifier &new_qualifier)
 125 {
 126    /* Input layout qualifiers can be specified multiple
 127     * times in separate declarations, as long as they match.
 128     */
 129    if (qualifier.flags.q.prim_type && new_qualifier.flags.q.prim_type
 130        && qualifier.prim_type != new_qualifier.prim_type) {
 131       _mesa_glsl_error(loc, state,
 132                        "conflicting input primitive %s specified",
 133                        state->stage == MESA_SHADER_GEOMETRY ?
 134                        "type" : "mode");
 135       return false;
 136    }
 137
 138    return true;
 139 }
 140
 141 static bool
 142 validate_vertex_spacing(YYLTYPE *loc,
 143                         _mesa_glsl_parse_state *state,
 144                         const ast_type_qualifier &qualifier,
 145                         const ast_type_qualifier &new_qualifier)
 146 {
 147    if (qualifier.flags.q.vertex_spacing && new_qualifier.flags.q.vertex_spacing
 148        && qualifier.vertex_spacing != new_qualifier.vertex_spacing) {
 149       _mesa_glsl_error(loc, state,
 150                        "conflicting vertex spacing specified");
 151       return false;
 152    }
 153
 154    return true;
 155 }
 156
 157 static bool
 158 validate_ordering(YYLTYPE *loc,
 159                   _mesa_glsl_parse_state *state,
 160                   const ast_type_qualifier &qualifier,
 161                   const ast_type_qualifier &new_qualifier)
 162 {
 163    if (qualifier.flags.q.ordering && new_qualifier.flags.q.ordering
 164        && qualifier.ordering != new_qualifier.ordering) {
 165       _mesa_glsl_error(loc, state,
 166                        "conflicting ordering specified");
 167       return false;
 168    }
 169
 170    return true;
 171 }
 172
 173 static bool
 174 validate_point_mode(MAYBE_UNUSED const ast_type_qualifier &qualifier,
 175                     MAYBE_UNUSED const ast_type_qualifier &new_qualifier)
 176 {
 177    /* Point mode can only be true if the flag is set. */
 178    assert (!qualifier.flags.q.point_mode || !new_qualifier.flags.q.point_mode
 179            || (qualifier.point_mode && new_qualifier.point_mode));
 180
 181    return true;
 182 }
 183
 184 /**
 185  * This function merges duplicate layout identifiers.
 186  *
 187  * It deals with duplicates within a single layout qualifier, among multiple
 188  * layout qualifiers on a single declaration and on several declarations for
 189  * the same variable.
 190  *
 191  * The is_single_layout_merge and is_multiple_layouts_merge parameters are
 192  * used to differentiate among them.
 193  */
 194 bool
 195 ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
 196                                     _mesa_glsl_parse_state *state,
 197                                     const ast_type_qualifier &q,
 198                                     bool is_single_layout_merge,
 199                                     bool is_multiple_layouts_merge)
 200 {
 201    bool r = true;
 202    ast_type_qualifier ubo_mat_mask;
 203    ubo_mat_mask.flags.i = 0;
 204    ubo_mat_mask.flags.q.row_major = 1;
 205    ubo_mat_mask.flags.q.column_major = 1;
 206
 207    ast_type_qualifier ubo_layout_mask;
 208    ubo_layout_mask.flags.i = 0;
 209    ubo_layout_mask.flags.q.std140 = 1;
 210    ubo_layout_mask.flags.q.packed = 1;
 211    ubo_layout_mask.flags.q.shared = 1;
 212    ubo_layout_mask.flags.q.std430 = 1;
 213
 214    ast_type_qualifier ubo_binding_mask;
 215    ubo_binding_mask.flags.i = 0;
 216    ubo_binding_mask.flags.q.explicit_binding = 1;
 217    ubo_binding_mask.flags.q.explicit_offset = 1;
 218
 219    ast_type_qualifier stream_layout_mask;
 220    stream_layout_mask.flags.i = 0;
 221    stream_layout_mask.flags.q.stream = 1;
 222
 223    /* FIXME: We should probably do interface and function param validation
 224     * separately.
 225     */
 226    ast_type_qualifier input_layout_mask;
 227    input_layout_mask.flags.i = 0;
 228    input_layout_mask.flags.q.centroid = 1;
 229    /* Function params can have constant */
 230    input_layout_mask.flags.q.constant = 1;
 231    input_layout_mask.flags.q.explicit_component = 1;
 232    input_layout_mask.flags.q.explicit_location = 1;
 233    input_layout_mask.flags.q.flat = 1;
 234    input_layout_mask.flags.q.in = 1;
 235    input_layout_mask.flags.q.invariant = 1;
 236    input_layout_mask.flags.q.noperspective = 1;
 237    input_layout_mask.flags.q.origin_upper_left = 1;
 238    /* Function params 'inout' will set this */
 239    input_layout_mask.flags.q.out = 1;
 240    input_layout_mask.flags.q.patch = 1;
 241    input_layout_mask.flags.q.pixel_center_integer = 1;
 242    input_layout_mask.flags.q.precise = 1;
 243    input_layout_mask.flags.q.sample = 1;
 244    input_layout_mask.flags.q.smooth = 1;
 245
 246    /* Uniform block layout qualifiers get to overwrite each
 247     * other (rightmost having priority), while all other
 248     * qualifiers currently don't allow duplicates.
 249     */
 250    ast_type_qualifier allowed_duplicates_mask;
 251    allowed_duplicates_mask.flags.i =
 252       ubo_mat_mask.flags.i |
 253       ubo_layout_mask.flags.i |
 254       ubo_binding_mask.flags.i;
 255
 256    /* Geometry shaders can have several layout qualifiers
 257     * assigning different stream values.
 258     */
 259    if (state->stage == MESA_SHADER_GEOMETRY) {
 260       allowed_duplicates_mask.flags.i |=
 261          stream_layout_mask.flags.i;
 262    }
 263
 264    if (is_single_layout_merge && !state->has_enhanced_layouts() &&
 265        (this->flags.i & q.flags.i & ~allowed_duplicates_mask.flags.i) != 0) {
 266       _mesa_glsl_error(loc, state, "duplicate layout qualifiers used");
 267       return false;
 268    }
 269
 270    if (is_multiple_layouts_merge && !state->has_420pack_or_es31()) {
 271       _mesa_glsl_error(loc, state,
 272                        "duplicate layout(...) qualifiers");
 273       return false;
 274    }
 275
 276    if (q.flags.q.prim_type) {
 277       r &= validate_prim_type(loc, state, *this, q);
 278       this->flags.q.prim_type = 1;
 279       this->prim_type = q.prim_type;
 280    }
 281
 282    if (q.flags.q.max_vertices) {
 283       if (this->flags.q.max_vertices
 284           && !is_single_layout_merge && !is_multiple_layouts_merge) {
 285          this->max_vertices->merge_qualifier(q.max_vertices);
 286       } else {
 287          this->flags.q.max_vertices = 1;
 288          this->max_vertices = q.max_vertices;
 289       }
 290    }
 291
 292    if (q.subroutine_list) {
 293       if (this->subroutine_list) {
 294          _mesa_glsl_error(loc, state,
 295                           "conflicting subroutine qualifiers used");
 296       } else {
 297          this->subroutine_list = q.subroutine_list;
 298       }
 299    }
 300
 301    if (q.flags.q.invocations) {
 302       if (this->flags.q.invocations
 303           && !is_single_layout_merge && !is_multiple_layouts_merge) {
 304          this->invocations->merge_qualifier(q.invocations);
 305       } else {
 306          this->flags.q.invocations = 1;
 307          this->invocations = q.invocations;
 308       }
 309    }
 310
 311    if (state->stage == MESA_SHADER_GEOMETRY &&
 312        state->has_explicit_attrib_stream()) {
 313       if (!this->flags.q.explicit_stream) {
 314          if (q.flags.q.stream) {
 315             this->flags.q.stream = 1;
 316             this->stream = q.stream;
 317          } else if (!this->flags.q.stream && this->flags.q.out &&
 318                     !this->flags.q.in) {
 319             /* Assign default global stream value */
 320             this->flags.q.stream = 1;
 321             this->stream = state->out_qualifier->stream;
 322          }
 323       }
 324    }
 325
 326    if (state->has_enhanced_layouts()) {
 327       if (!this->flags.q.explicit_xfb_buffer) {
 328          if (q.flags.q.xfb_buffer) {
 329             this->flags.q.xfb_buffer = 1;
 330             this->xfb_buffer = q.xfb_buffer;
 331          } else if (!this->flags.q.xfb_buffer && this->flags.q.out &&
 332                     !this->flags.q.in) {
 333             /* Assign global xfb_buffer value */
 334             this->flags.q.xfb_buffer = 1;
 335             this->xfb_buffer = state->out_qualifier->xfb_buffer;
 336          }
 337       }
 338
 339       if (q.flags.q.explicit_xfb_stride) {
 340          this->flags.q.xfb_stride = 1;
 341          this->flags.q.explicit_xfb_stride = 1;
 342          this->xfb_stride = q.xfb_stride;
 343       }
 344    }
 345
 346    if (q.flags.q.vertices) {
 347       if (this->flags.q.vertices
 348           && !is_single_layout_merge && !is_multiple_layouts_merge) {
 349          this->vertices->merge_qualifier(q.vertices);
 350       } else {
 351          this->flags.q.vertices = 1;
 352          this->vertices = q.vertices;
 353       }
 354    }
 355
 356    if (q.flags.q.vertex_spacing) {
 357       r &= validate_vertex_spacing(loc, state, *this, q);
 358       this->flags.q.vertex_spacing = 1;
 359       this->vertex_spacing = q.vertex_spacing;
 360    }
 361
 362    if (q.flags.q.ordering) {
 363       r &= validate_ordering(loc, state, *this, q);
 364       this->flags.q.ordering = 1;
 365       this->ordering = q.ordering;
 366    }
 367
 368    if (q.flags.q.point_mode) {
 369       r &= validate_point_mode(*this, q);
 370       this->flags.q.point_mode = 1;
 371       this->point_mode = q.point_mode;
 372    }
 373
 374    if (q.flags.q.early_fragment_tests)
 375       this->flags.q.early_fragment_tests = true;
 376
 377    if ((q.flags.i & ubo_mat_mask.flags.i) != 0)
 378       this->flags.i &= ~ubo_mat_mask.flags.i;
 379    if ((q.flags.i & ubo_layout_mask.flags.i) != 0)
 380       this->flags.i &= ~ubo_layout_mask.flags.i;
 381
 382    for (int i = 0; i < 3; i++) {
 383       if (q.flags.q.local_size & (1 << i)) {
 384          if (this->local_size[i]
 385              && !is_single_layout_merge && !is_multiple_layouts_merge) {
 386             this->local_size[i]->merge_qualifier(q.local_size[i]);
 387          } else {
 388             this->local_size[i] = q.local_size[i];
 389          }
 390       }
 391    }
 392
 393    if (q.flags.q.local_size_variable)
 394       this->flags.q.local_size_variable = true;
 395
 396    this->flags.i |= q.flags.i;
 397
 398    if (this->flags.q.in &&
 399        (this->flags.i & ~input_layout_mask.flags.i) != 0) {
 400       _mesa_glsl_error(loc, state, "invalid input layout qualifier used");
 401       return false;
 402    }
 403
 404    if (q.flags.q.explicit_align)
 405       this->align = q.align;
 406
 407    if (q.flags.q.explicit_location)
 408       this->location = q.location;
 409
 410    if (q.flags.q.explicit_index)
 411       this->index = q.index;
 412
 413   if (q.flags.q.explicit_component)
 414       this->component = q.component;
 415
 416    if (q.flags.q.explicit_binding)
 417       this->binding = q.binding;
 418
 419    if (q.flags.q.explicit_offset || q.flags.q.explicit_xfb_offset)
 420       this->offset = q.offset;
 421
 422    if (q.precision != ast_precision_none)
 423       this->precision = q.precision;
 424
 425    if (q.flags.q.explicit_image_format) {
 426       this->image_format = q.image_format;
 427       this->image_base_type = q.image_base_type;
 428    }
 429
 430    return r;
 431 }
 432
 433 bool
 434 ast_type_qualifier::validate_out_qualifier(YYLTYPE *loc,
 435                                            _mesa_glsl_parse_state *state)
 436 {
 437    bool r = true;
 438    ast_type_qualifier valid_out_mask;
 439    valid_out_mask.flags.i = 0;
 440
 441    switch (state->stage) {
 442    case MESA_SHADER_GEOMETRY:
 443       if (this->flags.q.prim_type) {
 444          /* Make sure this is a valid output primitive type. */
 445          switch (this->prim_type) {
 446          case GL_POINTS:
 447          case GL_LINE_STRIP:
 448          case GL_TRIANGLE_STRIP:
 449             break;
 450          default:
 451             r = false;
 452             _mesa_glsl_error(loc, state, "invalid geometry shader output "
 453                              "primitive type");
 454             break;
 455          }
 456       }
 457
 458       valid_out_mask.flags.q.stream = 1;
 459       valid_out_mask.flags.q.explicit_stream = 1;
 460       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 461       valid_out_mask.flags.q.xfb_buffer = 1;
 462       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 463       valid_out_mask.flags.q.xfb_stride = 1;
 464       valid_out_mask.flags.q.max_vertices = 1;
 465       valid_out_mask.flags.q.prim_type = 1;
 466       break;
 467    case MESA_SHADER_TESS_CTRL:
 468       valid_out_mask.flags.q.vertices = 1;
 469       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 470       valid_out_mask.flags.q.xfb_buffer = 1;
 471       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 472       valid_out_mask.flags.q.xfb_stride = 1;
 473       break;
 474    case MESA_SHADER_TESS_EVAL:
 475    case MESA_SHADER_VERTEX:
 476       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 477       valid_out_mask.flags.q.xfb_buffer = 1;
 478       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 479       valid_out_mask.flags.q.xfb_stride = 1;
 480       break;
 481    case MESA_SHADER_FRAGMENT:
 482       valid_out_mask.flags.q.blend_support = 1;
 483       break;
 484    default:
 485       r = false;
 486       _mesa_glsl_error(loc, state,
 487                        "out layout qualifiers only valid in "
 488                        "geometry, tessellation, vertex and fragment shaders");
 489    }
 490
 491    /* Generate an error when invalid output layout qualifiers are used. */
 492    if ((this->flags.i & ~valid_out_mask.flags.i) != 0) {
 493       r = false;
 494       _mesa_glsl_error(loc, state, "invalid output layout qualifiers used");
 495    }
 496
 497    return r;
 498 }
 499
 500 bool
 501 ast_type_qualifier::merge_into_out_qualifier(YYLTYPE *loc,
 502                                              _mesa_glsl_parse_state *state,
 503                                              ast_node* &node)
 504 {
 505    const bool r = state->out_qualifier->merge_qualifier(loc, state,
 506                                                         *this, false);
 507
 508    switch (state->stage) {
 509    case MESA_SHADER_GEOMETRY:
 510       /* Allow future assignments of global out's stream id value */
 511       state->out_qualifier->flags.q.explicit_stream = 0;
 512       break;
 513    case MESA_SHADER_TESS_CTRL:
 514       node = new(state->linalloc) ast_tcs_output_layout(*loc);
 515       break;
 516    default:
 517       break;
 518    }
 519
 520    /* Allow future assignments of global out's */
 521    state->out_qualifier->flags.q.explicit_xfb_buffer = 0;
 522    state->out_qualifier->flags.q.explicit_xfb_stride = 0;
 523
 524    return r;
 525 }
 526
 527 bool
 528 ast_type_qualifier::validate_in_qualifier(YYLTYPE *loc,
 529                                           _mesa_glsl_parse_state *state)
 530 {
 531    bool r = true;
 532    ast_type_qualifier valid_in_mask;
 533    valid_in_mask.flags.i = 0;
 534
 535    switch (state->stage) {
 536    case MESA_SHADER_TESS_EVAL:
 537       if (this->flags.q.prim_type) {
 538          /* Make sure this is a valid input primitive type. */
 539          switch (this->prim_type) {
 540          case GL_TRIANGLES:
 541          case GL_QUADS:
 542          case GL_ISOLINES:
 543             break;
 544          default:
 545             r = false;
 546             _mesa_glsl_error(loc, state,
 547                              "invalid tessellation evaluation "
 548                              "shader input primitive type");
 549             break;
 550          }
 551       }
 552
 553       valid_in_mask.flags.q.prim_type = 1;
 554       valid_in_mask.flags.q.vertex_spacing = 1;
 555       valid_in_mask.flags.q.ordering = 1;
 556       valid_in_mask.flags.q.point_mode = 1;
 557       break;
 558    case MESA_SHADER_GEOMETRY:
 559       if (this->flags.q.prim_type) {
 560          /* Make sure this is a valid input primitive type. */
 561          switch (this->prim_type) {
 562          case GL_POINTS:
 563          case GL_LINES:
 564          case GL_LINES_ADJACENCY:
 565          case GL_TRIANGLES:
 566          case GL_TRIANGLES_ADJACENCY:
 567             break;
 568          default:
 569             r = false;
 570             _mesa_glsl_error(loc, state,
 571                              "invalid geometry shader input primitive type");
 572             break;
 573          }
 574       }
 575
 576       valid_in_mask.flags.q.prim_type = 1;
 577       valid_in_mask.flags.q.invocations = 1;
 578       break;
 579    case MESA_SHADER_FRAGMENT:
 580       valid_in_mask.flags.q.early_fragment_tests = 1;
 581       valid_in_mask.flags.q.inner_coverage = 1;
 582       valid_in_mask.flags.q.post_depth_coverage = 1;
 583       break;
 584    case MESA_SHADER_COMPUTE:
 585       valid_in_mask.flags.q.local_size = 7;
 586       valid_in_mask.flags.q.local_size_variable = 1;
 587       break;
 588    default:
 589       r = false;
 590       _mesa_glsl_error(loc, state,
 591                        "input layout qualifiers only valid in "
 592                        "geometry, tessellation, fragment and compute shaders");
 593       break;
 594    }
 595
 596    /* Generate an error when invalid input layout qualifiers are used. */
 597    if ((this->flags.i & ~valid_in_mask.flags.i) != 0) {
 598       r = false;
 599       _mesa_glsl_error(loc, state, "invalid input layout qualifiers used");
 600    }
 601
 602    /* The checks below are also performed when merging but we want to spit an
 603     * error against the default global input qualifier as soon as we can, with
 604     * the closest error location in the shader.
 605     */
 606    r &= validate_prim_type(loc, state, *state->in_qualifier, *this);
 607    r &= validate_vertex_spacing(loc, state, *state->in_qualifier, *this);
 608    r &= validate_ordering(loc, state, *state->in_qualifier, *this);
 609    r &= validate_point_mode(*state->in_qualifier, *this);
 610
 611    return r;
 612 }
 613
 614 bool
 615 ast_type_qualifier::merge_into_in_qualifier(YYLTYPE *loc,
 616                                             _mesa_glsl_parse_state *state,
 617                                             ast_node* &node)
 618 {
 619    bool r = true;
 620    void *lin_ctx = state->linalloc;
 621
 622    /* We create the gs_input_layout node before merging so, in the future, no
 623     * more repeated nodes will be created as we will have the flag set.
 624     */
 625    if (state->stage == MESA_SHADER_GEOMETRY
 626        && this->flags.q.prim_type && !state->in_qualifier->flags.q.prim_type) {
 627       node = new(lin_ctx) ast_gs_input_layout(*loc, this->prim_type);
 628    }
 629
 630    r = state->in_qualifier->merge_qualifier(loc, state, *this, false);
 631
 632    if (state->in_qualifier->flags.q.early_fragment_tests) {
 633       state->fs_early_fragment_tests = true;
 634       state->in_qualifier->flags.q.early_fragment_tests = false;
 635    }
 636
 637    if (state->in_qualifier->flags.q.inner_coverage) {
 638       state->fs_inner_coverage = true;
 639       state->in_qualifier->flags.q.inner_coverage = false;
 640    }
 641
 642    if (state->in_qualifier->flags.q.post_depth_coverage) {
 643       state->fs_post_depth_coverage = true;
 644       state->in_qualifier->flags.q.post_depth_coverage = false;
 645    }
 646
 647    if (state->fs_inner_coverage && state->fs_post_depth_coverage) {
 648       _mesa_glsl_error(loc, state,
 649                        "inner_coverage & post_depth_coverage layout qualifiers "
 650                        "are mutally exclusives");
 651       r = false;
 652    }
 653
 654    /* We allow the creation of multiple cs_input_layout nodes. Coherence among
 655     * all existing nodes is checked later, when the AST node is transformed
 656     * into HIR.
 657     */
 658    if (state->in_qualifier->flags.q.local_size) {
 659       node = new(lin_ctx) ast_cs_input_layout(*loc,
 660                                               state->in_qualifier->local_size);
 661       state->in_qualifier->flags.q.local_size = 0;
 662       for (int i = 0; i < 3; i++)
 663          state->in_qualifier->local_size[i] = NULL;
 664    }
 665
 666    if (state->in_qualifier->flags.q.local_size_variable) {
 667       state->cs_input_local_size_variable_specified = true;
 668       state->in_qualifier->flags.q.local_size_variable = false;
 669    }
 670
 671    return r;
 672 }
 673
 674 bool
 675 ast_type_qualifier::push_to_global(YYLTYPE *loc,
 676                                    _mesa_glsl_parse_state *state)
 677 {
 678    if (this->flags.q.xfb_stride) {
 679       this->flags.q.xfb_stride = 0;
 680
 681       unsigned buff_idx;
 682       if (process_qualifier_constant(state, loc, "xfb_buffer",
 683                                      this->xfb_buffer, &buff_idx)) {
 684          if (state->out_qualifier->out_xfb_stride[buff_idx]) {
 685             state->out_qualifier->out_xfb_stride[buff_idx]->merge_qualifier(
 686                new(state->linalloc) ast_layout_expression(*loc,
 687                                                           this->xfb_stride));
 688          } else {
 689             state->out_qualifier->out_xfb_stride[buff_idx] =
 690                new(state->linalloc) ast_layout_expression(*loc,
 691                                                           this->xfb_stride);
 692          }
 693       }
 694    }
 695
 696    return true;
 697 }
 698
 699 /**
 700  * Check if the current type qualifier has any illegal flags.
 701  *
 702  * If so, print an error message, followed by a list of illegal flags.
 703  *
 704  * \param message        The error message to print.
 705  * \param allowed_flags  A list of valid flags.
 706  */
 707 bool
 708 ast_type_qualifier::validate_flags(YYLTYPE *loc,
 709                                    _mesa_glsl_parse_state *state,
 710                                    const ast_type_qualifier &allowed_flags,
 711                                    const char *message, const char *name)
 712 {
 713    ast_type_qualifier bad;
 714    bad.flags.i = this->flags.i & ~allowed_flags.flags.i;
 715    if (bad.flags.i == 0)
 716       return true;
 717
 718    _mesa_glsl_error(loc, state,
 719                     "%s '%s':"
 720                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
 721                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
 722                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
 723                     message, name,
 724                     bad.flags.q.invariant ? " invariant" : "",
 725                     bad.flags.q.precise ? " precise" : "",
 726                     bad.flags.q.constant ? " constant" : "",
 727                     bad.flags.q.attribute ? " attribute" : "",
 728                     bad.flags.q.varying ? " varying" : "",
 729                     bad.flags.q.in ? " in" : "",
 730                     bad.flags.q.out ? " out" : "",
 731                     bad.flags.q.centroid ? " centroid" : "",
 732                     bad.flags.q.sample ? " sample" : "",
 733                     bad.flags.q.patch ? " patch" : "",
 734                     bad.flags.q.uniform ? " uniform" : "",
 735                     bad.flags.q.buffer ? " buffer" : "",
 736                     bad.flags.q.shared_storage ? " shared_storage" : "",
 737                     bad.flags.q.smooth ? " smooth" : "",
 738                     bad.flags.q.flat ? " flat" : "",
 739                     bad.flags.q.noperspective ? " noperspective" : "",
 740                     bad.flags.q.origin_upper_left ? " origin_upper_left" : "",
 741                     bad.flags.q.pixel_center_integer ? " pixel_center_integer" : "",
 742                     bad.flags.q.explicit_align ? " align" : "",
 743                     bad.flags.q.explicit_component ? " component" : "",
 744                     bad.flags.q.explicit_location ? " location" : "",
 745                     bad.flags.q.explicit_index ? " index" : "",
 746                     bad.flags.q.explicit_binding ? " binding" : "",
 747                     bad.flags.q.explicit_offset ? " offset" : "",
 748                     bad.flags.q.depth_type ? " depth_type" : "",
 749                     bad.flags.q.std140 ? " std140" : "",
 750                     bad.flags.q.std430 ? " std430" : "",
 751                     bad.flags.q.shared ? " shared" : "",
 752                     bad.flags.q.packed ? " packed" : "",
 753                     bad.flags.q.column_major ? " column_major" : "",
 754                     bad.flags.q.row_major ? " row_major" : "",
 755                     bad.flags.q.prim_type ? " prim_type" : "",
 756                     bad.flags.q.max_vertices ? " max_vertices" : "",
 757                     bad.flags.q.local_size ? " local_size" : "",
 758                     bad.flags.q.local_size_variable ? " local_size_variable" : "",
 759                     bad.flags.q.early_fragment_tests ? " early_fragment_tests" : "",
 760                     bad.flags.q.explicit_image_format ? " image_format" : "",
 761                     bad.flags.q.coherent ? " coherent" : "",
 762                     bad.flags.q._volatile ? " _volatile" : "",
 763                     bad.flags.q.restrict_flag ? " restrict_flag" : "",
 764                     bad.flags.q.read_only ? " read_only" : "",
 765                     bad.flags.q.write_only ? " write_only" : "",
 766                     bad.flags.q.invocations ? " invocations" : "",
 767                     bad.flags.q.stream ? " stream" : "",
 768                     bad.flags.q.explicit_stream ? " stream" : "",
 769                     bad.flags.q.explicit_xfb_offset ? " xfb_offset" : "",
 770                     bad.flags.q.xfb_buffer ? " xfb_buffer" : "",
 771                     bad.flags.q.explicit_xfb_buffer ? " xfb_buffer" : "",
 772                     bad.flags.q.xfb_stride ? " xfb_stride" : "",
 773                     bad.flags.q.explicit_xfb_stride ? " xfb_stride" : "",
 774                     bad.flags.q.vertex_spacing ? " vertex_spacing" : "",
 775                     bad.flags.q.ordering ? " ordering" : "",
 776                     bad.flags.q.point_mode ? " point_mode" : "",
 777                     bad.flags.q.vertices ? " vertices" : "",
 778                     bad.flags.q.subroutine ? " subroutine" : "",
 779                     bad.flags.q.blend_support ? " blend_support" : "",
 780                     bad.flags.q.inner_coverage ? " inner_coverage" : "",
 781                     bad.flags.q.post_depth_coverage ? " post_depth_coverage" : "");
 782    return false;
 783 }
 784
 785 bool
 786 ast_layout_expression::process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 787                                                   const char *qual_indentifier,
 788                                                   unsigned *value,
 789                                                   bool can_be_zero)
 790 {
 791    int min_value = 0;
 792    bool first_pass = true;
 793    *value = 0;
 794
 795    if (!can_be_zero)
 796       min_value = 1;
 797
 798    for (exec_node *node = layout_const_expressions.get_head_raw();
 799         !node->is_tail_sentinel(); node = node->next) {
 800
 801       exec_list dummy_instructions;
 802       ast_node *const_expression = exec_node_data(ast_node, node, link);
 803
 804       ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 805
 806       ir_constant *const const_int = ir->constant_expression_value();
 807       if (const_int == NULL || !const_int->type->is_integer()) {
 808          YYLTYPE loc = const_expression->get_location();
 809          _mesa_glsl_error(&loc, state, "%s must be an integral constant "
 810                           "expression", qual_indentifier);
 811          return false;
 812       }
 813
 814       if (const_int->value.i[0] < min_value) {
 815          YYLTYPE loc = const_expression->get_location();
 816          _mesa_glsl_error(&loc, state, "%s layout qualifier is invalid "
 817                           "(%d < %d)", qual_indentifier,
 818                           const_int->value.i[0], min_value);
 819          return false;
 820       }
 821
 822       if (!first_pass && *value != const_int->value.u[0]) {
 823          YYLTYPE loc = const_expression->get_location();
 824          _mesa_glsl_error(&loc, state, "%s layout qualifier does not "
 825                           "match previous declaration (%d vs %d)",
 826                           qual_indentifier, *value, const_int->value.i[0]);
 827          return false;
 828       } else {
 829          first_pass = false;
 830          *value = const_int->value.u[0];
 831       }
 832
 833       /* If the location is const (and we've verified that
 834        * it is) then no instructions should have been emitted
 835        * when we converted it to HIR. If they were emitted,
 836        * then either the location isn't const after all, or
 837        * we are emitting unnecessary instructions.
 838        */
 839       assert(dummy_instructions.is_empty());
 840    }
 841
 842    return true;
 843 }
 844
 845 bool
 846 process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 847                            YYLTYPE *loc,
 848                            const char *qual_indentifier,
 849                            ast_expression *const_expression,
 850                            unsigned *value)
 851 {
 852    exec_list dummy_instructions;
 853
 854    if (const_expression == NULL) {
 855       *value = 0;
 856       return true;
 857    }
 858
 859    ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 860
 861    ir_constant *const const_int = ir->constant_expression_value();
 862    if (const_int == NULL || !const_int->type->is_integer()) {
 863       _mesa_glsl_error(loc, state, "%s must be an integral constant "
 864                        "expression", qual_indentifier);
 865       return false;
 866    }
 867
 868    if (const_int->value.i[0] < 0) {
 869       _mesa_glsl_error(loc, state, "%s layout qualifier is invalid (%d < 0)",
 870                        qual_indentifier, const_int->value.u[0]);
 871       return false;
 872    }
 873
 874    /* If the location is const (and we've verified that
 875     * it is) then no instructions should have been emitted
 876     * when we converted it to HIR. If they were emitted,
 877     * then either the location isn't const after all, or
 878     * we are emitting unnecessary instructions.
 879     */
 880    assert(dummy_instructions.is_empty());
 881
 882    *value = const_int->value.u[0];
 883    return true;
 884 }