1 /* -*- c++ -*- */ 2 /* 3 * Copyright 2009 Intel Corporation 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the next 13 * paragraph) shall be included in all copies or substantial portions of the 14 * Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 22 * DEALINGS IN THE SOFTWARE. 23 */ 24 25 #pragma once 26 #ifndef AST_H 27 #define AST_H 28 29 #include "list.h" 30 #include "glsl_parser_extras.h" 31 32 struct _mesa_glsl_parse_state; 33 34 struct YYLTYPE; 35 36 /** 37 * \defgroup AST Abstract syntax tree node definitions 38 * 39 * An abstract syntax tree is generated by the parser. This is a fairly 40 * direct representation of the gramma derivation for the source program. 41 * No symantic checking is done during the generation of the AST. Only 42 * syntactic checking is done. Symantic checking is performed by a later 43 * stage that converts the AST to a more generic intermediate representation. 44 * 45 *@{ 46 */ 47 /** 48 * Base class of all abstract syntax tree nodes 49 */ 50 class ast_node { 51 public: 52 DECLARE_LINEAR_ZALLOC_CXX_OPERATORS(ast_node); 53 54 /** 55 * Print an AST node in something approximating the original GLSL code 56 */ 57 virtual void print(void) const; 58 59 /** 60 * Convert the AST node to the high-level intermediate representation 61 */ 62 virtual ir_rvalue *hir(exec_list *instructions, 63 struct _mesa_glsl_parse_state *state); 64 65 virtual bool has_sequence_subexpression() const; 66 67 /** 68 * Retrieve the source location of an AST node 69 * 70 * This function is primarily used to get the source position of an AST node 71 * into a form that can be passed to \c _mesa_glsl_error. 72 * 73 * \sa _mesa_glsl_error, ast_node::set_location 74 */ 75 struct YYLTYPE get_location(void) const 76 { 77 struct YYLTYPE locp; 78 79 locp.source = this->location.source; 80 locp.first_line = this->location.first_line; 81 locp.first_column = this->location.first_column; 82 locp.last_line = this->location.last_line; 83 locp.last_column = this->location.last_column; 84 85 return locp; 86 } 87 88 /** 89 * Set the source location of an AST node from a parser location 90 * 91 * \sa ast_node::get_location 92 */ 93 void set_location(const struct YYLTYPE &locp) 94 { 95 this->location.source = locp.source; 96 this->location.first_line = locp.first_line; 97 this->location.first_column = locp.first_column; 98 this->location.last_line = locp.last_line; 99 this->location.last_column = locp.last_column; 100 } 101 102 /** 103 * Set the source location range of an AST node using two location nodes 104 * 105 * \sa ast_node::set_location 106 */ 107 void set_location_range(const struct YYLTYPE &begin, const struct YYLTYPE &end) 108 { 109 this->location.source = begin.source; 110 this->location.first_line = begin.first_line; 111 this->location.last_line = end.last_line; 112 this->location.first_column = begin.first_column; 113 this->location.last_column = end.last_column; 114 } 115 116 /** 117 * Source location of the AST node. 118 */ 119 struct { 120 unsigned source; /**< GLSL source number. */ 121 unsigned first_line; /**< First line number within the source string. */ 122 unsigned first_column; /**< First column in the first line. */ 123 unsigned last_line; /**< Last line number within the source string. */ 124 unsigned last_column; /**< Last column in the last line. */ 125 } location; 126 127 exec_node link; 128 129 virtual void set_is_lhs(bool); 130 131 protected: 132 /** 133 * The only constructor is protected so that only derived class objects can 134 * be created. 135 */ 136 ast_node(void); 137 }; 138 139 140 /** 141 * Operators for AST expression nodes. 142 */ 143 enum ast_operators { 144 ast_assign, 145 ast_plus, /**< Unary + operator. */ 146 ast_neg, 147 ast_add, 148 ast_sub, 149 ast_mul, 150 ast_div, 151 ast_mod, 152 ast_lshift, 153 ast_rshift, 154 ast_less, 155 ast_greater, 156 ast_lequal, 157 ast_gequal, 158 ast_equal, 159 ast_nequal, 160 ast_bit_and, 161 ast_bit_xor, 162 ast_bit_or, 163 ast_bit_not, 164 ast_logic_and, 165 ast_logic_xor, 166 ast_logic_or, 167 ast_logic_not, 168 169 ast_mul_assign, 170 ast_div_assign, 171 ast_mod_assign, 172 ast_add_assign, 173 ast_sub_assign, 174 ast_ls_assign, 175 ast_rs_assign, 176 ast_and_assign, 177 ast_xor_assign, 178 ast_or_assign, 179 180 ast_conditional, 181 182 ast_pre_inc, 183 ast_pre_dec, 184 ast_post_inc, 185 ast_post_dec, 186 ast_field_selection, 187 ast_array_index, 188 ast_unsized_array_dim, 189 190 ast_function_call, 191 192 ast_identifier, 193 ast_int_constant, 194 ast_uint_constant, 195 ast_float_constant, 196 ast_bool_constant, 197 ast_double_constant, 198 199 ast_sequence, 200 ast_aggregate 201 202 /** 203 * Number of possible operators for an ast_expression 204 * 205 * This is done as a define instead of as an additional value in the enum so 206 * that the compiler won't generate spurious messages like "warning: 207 * enumeration value ast_num_operators not handled in switch" 208 */ 209 #define AST_NUM_OPERATORS (ast_aggregate + 1) 210 }; 211 212 /** 213 * Representation of any sort of expression. 214 */ 215 class ast_expression : public ast_node { 216 public: 217 ast_expression(int oper, ast_expression *, 218 ast_expression *, ast_expression *); 219 220 ast_expression(const char *identifier) : 221 oper(ast_identifier) 222 { 223 subexpressions[0] = NULL; 224 subexpressions[1] = NULL; 225 subexpressions[2] = NULL; 226 primary_expression.identifier = identifier; 227 this->non_lvalue_description = NULL; 228 this->is_lhs = false; 229 } 230 231 static const char *operator_string(enum ast_operators op); 232 233 virtual ir_rvalue *hir(exec_list *instructions, 234 struct _mesa_glsl_parse_state *state); 235 236 virtual void hir_no_rvalue(exec_list *instructions, 237 struct _mesa_glsl_parse_state *state); 238 239 virtual bool has_sequence_subexpression() const; 240 241 ir_rvalue *do_hir(exec_list *instructions, 242 struct _mesa_glsl_parse_state *state, 243 bool needs_rvalue); 244 245 virtual void print(void) const; 246 247 enum ast_operators oper; 248 249 ast_expression *subexpressions[3]; 250 251 union { 252 const char *identifier; 253 int int_constant; 254 float float_constant; 255 unsigned uint_constant; 256 int bool_constant; 257 double double_constant; 258 } primary_expression; 259 260 261 /** 262 * List of expressions for an \c ast_sequence or parameters for an 263 * \c ast_function_call 264 */ 265 exec_list expressions; 266 267 /** 268 * For things that can't be l-values, this describes what it is. 269 * 270 * This text is used by the code that generates IR for assignments to 271 * detect and emit useful messages for assignments to some things that 272 * can't be l-values. For example, pre- or post-incerement expressions. 273 * 274 * \note 275 * This pointer may be \c NULL. 276 */ 277 const char *non_lvalue_description; 278 279 void set_is_lhs(bool new_value); 280 281 private: 282 bool is_lhs; 283 }; 284 285 class ast_expression_bin : public ast_expression { 286 public: 287 ast_expression_bin(int oper, ast_expression *, ast_expression *); 288 289 virtual void print(void) const; 290 }; 291 292 /** 293 * Subclass of expressions for function calls 294 */ 295 class ast_function_expression : public ast_expression { 296 public: 297 ast_function_expression(ast_expression *callee) 298 : ast_expression(ast_function_call, callee, 299 NULL, NULL), 300 cons(false) 301 { 302 /* empty */ 303 } 304 305 ast_function_expression(class ast_type_specifier *type) 306 : ast_expression(ast_function_call, (ast_expression *) type, 307 NULL, NULL), 308 cons(true) 309 { 310 /* empty */ 311 } 312 313 bool is_constructor() const 314 { 315 return cons; 316 } 317 318 virtual ir_rvalue *hir(exec_list *instructions, 319 struct _mesa_glsl_parse_state *state); 320 321 virtual void hir_no_rvalue(exec_list *instructions, 322 struct _mesa_glsl_parse_state *state); 323 324 virtual bool has_sequence_subexpression() const; 325 326 private: 327 /** 328 * Is this function call actually a constructor? 329 */ 330 bool cons; 331 ir_rvalue * 332 handle_method(exec_list *instructions, 333 struct _mesa_glsl_parse_state *state); 334 }; 335 336 class ast_subroutine_list : public ast_node 337 { 338 public: 339 virtual void print(void) const; 340 exec_list declarations; 341 }; 342 343 class ast_array_specifier : public ast_node { 344 public: 345 ast_array_specifier(const struct YYLTYPE &locp, ast_expression *dim) 346 { 347 set_location(locp); 348 array_dimensions.push_tail(&dim->link); 349 } 350 351 void add_dimension(ast_expression *dim) 352 { 353 array_dimensions.push_tail(&dim->link); 354 } 355 356 bool is_single_dimension() const 357 { 358 return this->array_dimensions.get_tail_raw()->prev != NULL && 359 this->array_dimensions.get_tail_raw()->prev->is_head_sentinel(); 360 } 361 362 virtual void print(void) const; 363 364 /* This list contains objects of type ast_node containing the 365 * array dimensions in outermost-to-innermost order. 366 */ 367 exec_list array_dimensions; 368 }; 369 370 class ast_layout_expression : public ast_node { 371 public: 372 ast_layout_expression(const struct YYLTYPE &locp, ast_expression *expr) 373 { 374 set_location(locp); 375 layout_const_expressions.push_tail(&expr->link); 376 } 377 378 bool process_qualifier_constant(struct _mesa_glsl_parse_state *state, 379 const char *qual_indentifier, 380 unsigned *value, bool can_be_zero); 381 382 void merge_qualifier(ast_layout_expression *l_expr) 383 { 384 layout_const_expressions.append_list(&l_expr->layout_const_expressions); 385 } 386 387 exec_list layout_const_expressions; 388 }; 389 390 /** 391 * C-style aggregate initialization class 392 * 393 * Represents C-style initializers of vectors, matrices, arrays, and 394 * structures. E.g., vec3 pos = {1.0, 0.0, -1.0} is equivalent to 395 * vec3 pos = vec3(1.0, 0.0, -1.0). 396 * 397 * Specified in GLSL 4.20 and GL_ARB_shading_language_420pack. 398 * 399 * \sa _mesa_ast_set_aggregate_type 400 */ 401 class ast_aggregate_initializer : public ast_expression { 402 public: 403 ast_aggregate_initializer() 404 : ast_expression(ast_aggregate, NULL, NULL, NULL), 405 constructor_type(NULL) 406 { 407 /* empty */ 408 } 409 410 /** 411 * glsl_type of the aggregate, which is inferred from the LHS of whatever 412 * the aggregate is being used to initialize. This can't be inferred at 413 * parse time (since the parser deals with ast_type_specifiers, not 414 * glsl_types), so the parser leaves it NULL. However, the ast-to-hir 415 * conversion code makes sure to fill it in with the appropriate type 416 * before hir() is called. 417 */ 418 const glsl_type *constructor_type; 419 420 virtual ir_rvalue *hir(exec_list *instructions, 421 struct _mesa_glsl_parse_state *state); 422 423 virtual void hir_no_rvalue(exec_list *instructions, 424 struct _mesa_glsl_parse_state *state); 425 }; 426 427 428 class ast_compound_statement : public ast_node { 429 public: 430 ast_compound_statement(int new_scope, ast_node *statements); 431 virtual void print(void) const; 432 433 virtual ir_rvalue *hir(exec_list *instructions, 434 struct _mesa_glsl_parse_state *state); 435 436 int new_scope; 437 exec_list statements; 438 }; 439 440 class ast_declaration : public ast_node { 441 public: 442 ast_declaration(const char *identifier, 443 ast_array_specifier *array_specifier, 444 ast_expression *initializer); 445 virtual void print(void) const; 446 447 const char *identifier; 448 449 ast_array_specifier *array_specifier; 450 451 ast_expression *initializer; 452 }; 453 454 455 enum { 456 ast_precision_none = 0, /**< Absence of precision qualifier. */ 457 ast_precision_high, 458 ast_precision_medium, 459 ast_precision_low 460 }; 461 462 struct ast_type_qualifier { 463 DECLARE_RALLOC_CXX_OPERATORS(ast_type_qualifier); 464 465 union { 466 struct { 467 unsigned invariant:1; 468 unsigned precise:1; 469 unsigned constant:1; 470 unsigned attribute:1; 471 unsigned varying:1; 472 unsigned in:1; 473 unsigned out:1; 474 unsigned centroid:1; 475 unsigned sample:1; 476 unsigned patch:1; 477 unsigned uniform:1; 478 unsigned buffer:1; 479 unsigned shared_storage:1; 480 unsigned smooth:1; 481 unsigned flat:1; 482 unsigned noperspective:1; 483 484 /** \name Layout qualifiers for GL_ARB_fragment_coord_conventions */ 485 /*@{*/ 486 unsigned origin_upper_left:1; 487 unsigned pixel_center_integer:1; 488 /*@}*/ 489 490 /** 491 * Flag set if GL_ARB_enhanced_layouts "align" layout qualifier is 492 * used. 493 */ 494 unsigned explicit_align:1; 495 496 /** 497 * Flag set if GL_ARB_explicit_attrib_location "location" layout 498 * qualifier is used. 499 */ 500 unsigned explicit_location:1; 501 /** 502 * Flag set if GL_ARB_explicit_attrib_location "index" layout 503 * qualifier is used. 504 */ 505 unsigned explicit_index:1; 506 507 /** 508 * Flag set if GL_ARB_enhanced_layouts "component" layout 509 * qualifier is used. 510 */ 511 unsigned explicit_component:1; 512 513 /** 514 * Flag set if GL_ARB_shading_language_420pack "binding" layout 515 * qualifier is used. 516 */ 517 unsigned explicit_binding:1; 518 519 /** 520 * Flag set if GL_ARB_shader_atomic counter "offset" layout 521 * qualifier is used. 522 */ 523 unsigned explicit_offset:1; 524 525 /** \name Layout qualifiers for GL_AMD_conservative_depth */ 526 /** \{ */ 527 unsigned depth_any:1; 528 unsigned depth_greater:1; 529 unsigned depth_less:1; 530 unsigned depth_unchanged:1; 531 /** \} */ 532 533 /** \name Layout qualifiers for GL_ARB_uniform_buffer_object */ 534 /** \{ */ 535 unsigned std140:1; 536 unsigned std430:1; 537 unsigned shared:1; 538 unsigned packed:1; 539 unsigned column_major:1; 540 unsigned row_major:1; 541 /** \} */ 542 543 /** \name Layout qualifiers for GLSL 1.50 geometry shaders */ 544 /** \{ */ 545 unsigned prim_type:1; 546 unsigned max_vertices:1; 547 /** \} */ 548 549 /** 550 * local_size_{x,y,z} flags for compute shaders. Bit 0 represents 551 * local_size_x, and so on. 552 */ 553 unsigned local_size:3; 554 555 /** \name Layout qualifiers for ARB_compute_variable_group_size. */ 556 /** \{ */ 557 unsigned local_size_variable:1; 558 /** \} */ 559 560 /** \name Layout and memory qualifiers for ARB_shader_image_load_store. */ 561 /** \{ */ 562 unsigned early_fragment_tests:1; 563 unsigned explicit_image_format:1; 564 unsigned coherent:1; 565 unsigned _volatile:1; 566 unsigned restrict_flag:1; 567 unsigned read_only:1; /**< "readonly" qualifier. */ 568 unsigned write_only:1; /**< "writeonly" qualifier. */ 569 /** \} */ 570 571 /** \name Layout qualifiers for GL_ARB_gpu_shader5 */ 572 /** \{ */ 573 unsigned invocations:1; 574 unsigned stream:1; /**< Has stream value assigned */ 575 unsigned explicit_stream:1; /**< stream value assigned explicitly by shader code */ 576 /** \} */ 577 578 /** \name Layout qualifiers for GL_ARB_enhanced_layouts */ 579 /** \{ */ 580 unsigned explicit_xfb_offset:1; /**< xfb_offset value assigned explicitly by shader code */ 581 unsigned xfb_buffer:1; /**< Has xfb_buffer value assigned */ 582 unsigned explicit_xfb_buffer:1; /**< xfb_buffer value assigned explicitly by shader code */ 583 unsigned xfb_stride:1; /**< Is xfb_stride value yet to be merged with global values */ 584 unsigned explicit_xfb_stride:1; /**< xfb_stride value assigned explicitly by shader code */ 585 /** \} */ 586 587 /** \name Layout qualifiers for GL_ARB_tessellation_shader */ 588 /** \{ */ 589 /* tess eval input layout */ 590 /* gs prim_type reused for primitive mode */ 591 unsigned vertex_spacing:1; 592 unsigned ordering:1; 593 unsigned point_mode:1; 594 /* tess control output layout */ 595 unsigned vertices:1; 596 /** \} */ 597 598 /** \name Qualifiers for GL_ARB_shader_subroutine */ 599 /** \{ */ 600 unsigned subroutine:1; /**< Is this marked 'subroutine' */ 601 unsigned subroutine_def:1; /**< Is this marked 'subroutine' with a list of types */ 602 /** \} */ 603 604 /** \name Qualifiers for GL_KHR_blend_equation_advanced */ 605 /** \{ */ 606 unsigned blend_support:1; /**< Are there any blend_support_ qualifiers */ 607 /** \} */ 608 609 /** 610 * Flag set if GL_ARB_post_depth_coverage layout qualifier is used. 611 */ 612 unsigned post_depth_coverage:1; 613 /** 614 * Flag set if GL_INTEL_conservartive_rasterization layout qualifier 615 * is used. 616 */ 617 unsigned inner_coverage:1; 618 } 619 /** \brief Set of flags, accessed by name. */ 620 q; 621 622 /** \brief Set of flags, accessed as a bitmask. */ 623 uint64_t i; 624 } flags; 625 626 /** Precision of the type (highp/medium/lowp). */ 627 unsigned precision:2; 628 629 /** 630 * Alignment specified via GL_ARB_enhanced_layouts "align" layout qualifier 631 */ 632 ast_expression *align; 633 634 /** Geometry shader invocations for GL_ARB_gpu_shader5. */ 635 ast_layout_expression *invocations; 636 637 /** 638 * Location specified via GL_ARB_explicit_attrib_location layout 639 * 640 * \note 641 * This field is only valid if \c explicit_location is set. 642 */ 643 ast_expression *location; 644 /** 645 * Index specified via GL_ARB_explicit_attrib_location layout 646 * 647 * \note 648 * This field is only valid if \c explicit_index is set. 649 */ 650 ast_expression *index; 651 652 /** 653 * Component specified via GL_ARB_enhaced_layouts 654 * 655 * \note 656 * This field is only valid if \c explicit_component is set. 657 */ 658 ast_expression *component; 659 660 /** Maximum output vertices in GLSL 1.50 geometry shaders. */ 661 ast_layout_expression *max_vertices; 662 663 /** Stream in GLSL 1.50 geometry shaders. */ 664 ast_expression *stream; 665 666 /** xfb_buffer specified via the GL_ARB_enhanced_layouts keyword. */ 667 ast_expression *xfb_buffer; 668 669 /** xfb_stride specified via the GL_ARB_enhanced_layouts keyword. */ 670 ast_expression *xfb_stride; 671 672 /** global xfb_stride values for each buffer */ 673 ast_layout_expression *out_xfb_stride[MAX_FEEDBACK_BUFFERS]; 674 675 /** 676 * Input or output primitive type in GLSL 1.50 geometry shaders 677 * and tessellation shaders. 678 */ 679 GLenum prim_type; 680 681 /** 682 * Binding specified via GL_ARB_shading_language_420pack's "binding" keyword. 683 * 684 * \note 685 * This field is only valid if \c explicit_binding is set. 686 */ 687 ast_expression *binding; 688 689 /** 690 * Offset specified via GL_ARB_shader_atomic_counter's or 691 * GL_ARB_enhanced_layouts "offset" keyword, or by GL_ARB_enhanced_layouts 692 * "xfb_offset" keyword. 693 * 694 * \note 695 * This field is only valid if \c explicit_offset is set. 696 */ 697 ast_expression *offset; 698 699 /** 700 * Local size specified via GL_ARB_compute_shader's "local_size_{x,y,z}" 701 * layout qualifier. Element i of this array is only valid if 702 * flags.q.local_size & (1 << i) is set. 703 */ 704 ast_layout_expression *local_size[3]; 705 706 /** Tessellation evaluation shader: vertex spacing (equal, fractional even/odd) */ 707 enum gl_tess_spacing vertex_spacing; 708 709 /** Tessellation evaluation shader: vertex ordering (CW or CCW) */ 710 GLenum ordering; 711 712 /** Tessellation evaluation shader: point mode */ 713 bool point_mode; 714 715 /** Tessellation control shader: number of output vertices */ 716 ast_layout_expression *vertices; 717 718 /** 719 * Image format specified with an ARB_shader_image_load_store 720 * layout qualifier. 721 * 722 * \note 723 * This field is only valid if \c explicit_image_format is set. 724 */ 725 GLenum image_format; 726 727 /** 728 * Base type of the data read from or written to this image. Only 729 * the following enumerants are allowed: GLSL_TYPE_UINT, 730 * GLSL_TYPE_INT, GLSL_TYPE_FLOAT. 731 * 732 * \note 733 * This field is only valid if \c explicit_image_format is set. 734 */ 735 glsl_base_type image_base_type; 736 737 /** 738 * Return true if and only if an interpolation qualifier is present. 739 */ 740 bool has_interpolation() const; 741 742 /** 743 * Return whether a layout qualifier is present. 744 */ 745 bool has_layout() const; 746 747 /** 748 * Return whether a storage qualifier is present. 749 */ 750 bool has_storage() const; 751 752 /** 753 * Return whether an auxiliary storage qualifier is present. 754 */ 755 bool has_auxiliary_storage() const; 756 757 /** 758 * Return true if and only if a memory qualifier is present. 759 */ 760 bool has_memory() const; 761 762 bool merge_qualifier(YYLTYPE *loc, 763 _mesa_glsl_parse_state *state, 764 const ast_type_qualifier &q, 765 bool is_single_layout_merge, 766 bool is_multiple_layouts_merge = false); 767 768 /** 769 * Validate current qualifier against the global out one. 770 */ 771 bool validate_out_qualifier(YYLTYPE *loc, 772 _mesa_glsl_parse_state *state); 773 774 /** 775 * Merge current qualifier into the global out one. 776 */ 777 bool merge_into_out_qualifier(YYLTYPE *loc, 778 _mesa_glsl_parse_state *state, 779 ast_node* &node); 780 781 /** 782 * Validate current qualifier against the global in one. 783 */ 784 bool validate_in_qualifier(YYLTYPE *loc, 785 _mesa_glsl_parse_state *state); 786 787 /** 788 * Merge current qualifier into the global in one. 789 */ 790 bool merge_into_in_qualifier(YYLTYPE *loc, 791 _mesa_glsl_parse_state *state, 792 ast_node* &node); 793 794 /** 795 * Push pending layout qualifiers to the global values. 796 */ 797 bool push_to_global(YYLTYPE *loc, 798 _mesa_glsl_parse_state *state); 799 800 bool validate_flags(YYLTYPE *loc, 801 _mesa_glsl_parse_state *state, 802 const ast_type_qualifier &allowed_flags, 803 const char *message, const char *name); 804 805 ast_subroutine_list *subroutine_list; 806 }; 807 808 class ast_declarator_list; 809 810 class ast_struct_specifier : public ast_node { 811 public: 812 ast_struct_specifier(void *lin_ctx, const char *identifier, 813 ast_declarator_list *declarator_list); 814 virtual void print(void) const; 815 816 virtual ir_rvalue *hir(exec_list *instructions, 817 struct _mesa_glsl_parse_state *state); 818 819 const char *name; 820 ast_type_qualifier *layout; 821 /* List of ast_declarator_list * */ 822 exec_list declarations; 823 bool is_declaration; 824 }; 825 826 827 828 class ast_type_specifier : public ast_node { 829 public: 830 /** Construct a type specifier from a type name */ 831 ast_type_specifier(const char *name) 832 : type_name(name), structure(NULL), array_specifier(NULL), 833 default_precision(ast_precision_none) 834 { 835 /* empty */ 836 } 837 838 /** Construct a type specifier from a structure definition */ 839 ast_type_specifier(ast_struct_specifier *s) 840 : type_name(s->name), structure(s), array_specifier(NULL), 841 default_precision(ast_precision_none) 842 { 843 /* empty */ 844 } 845 846 const struct glsl_type *glsl_type(const char **name, 847 struct _mesa_glsl_parse_state *state) 848 const; 849 850 virtual void print(void) const; 851 852 ir_rvalue *hir(exec_list *, struct _mesa_glsl_parse_state *); 853 854 const char *type_name; 855 ast_struct_specifier *structure; 856 857 ast_array_specifier *array_specifier; 858 859 /** For precision statements, this is the given precision; otherwise none. */ 860 unsigned default_precision:2; 861 }; 862 863 864 class ast_fully_specified_type : public ast_node { 865 public: 866 virtual void print(void) const; 867 bool has_qualifiers(_mesa_glsl_parse_state *state) const; 868 869 ast_fully_specified_type() : qualifier(), specifier(NULL) 870 { 871 } 872 873 const struct glsl_type *glsl_type(const char **name, 874 struct _mesa_glsl_parse_state *state) 875 const; 876 877 ast_type_qualifier qualifier; 878 ast_type_specifier *specifier; 879 }; 880 881 882 class ast_declarator_list : public ast_node { 883 public: 884 ast_declarator_list(ast_fully_specified_type *); 885 virtual void print(void) const; 886 887 virtual ir_rvalue *hir(exec_list *instructions, 888 struct _mesa_glsl_parse_state *state); 889 890 ast_fully_specified_type *type; 891 /** List of 'ast_declaration *' */ 892 exec_list declarations; 893 894 /** 895 * Flags for redeclarations. In these cases, no type is specified, to 896 * `type` is allowed to be NULL. In all other cases, this would be an error. 897 */ 898 int invariant; /** < `invariant` redeclaration */ 899 int precise; /** < `precise` redeclaration */ 900 }; 901 902 903 class ast_parameter_declarator : public ast_node { 904 public: 905 ast_parameter_declarator() : 906 type(NULL), 907 identifier(NULL), 908 array_specifier(NULL), 909 formal_parameter(false), 910 is_void(false) 911 { 912 /* empty */ 913 } 914 915 virtual void print(void) const; 916 917 virtual ir_rvalue *hir(exec_list *instructions, 918 struct _mesa_glsl_parse_state *state); 919 920 ast_fully_specified_type *type; 921 const char *identifier; 922 ast_array_specifier *array_specifier; 923 924 static void parameters_to_hir(exec_list *ast_parameters, 925 bool formal, exec_list *ir_parameters, 926 struct _mesa_glsl_parse_state *state); 927 928 private: 929 /** Is this parameter declaration part of a formal parameter list? */ 930 bool formal_parameter; 931 932 /** 933 * Is this parameter 'void' type? 934 * 935 * This field is set by \c ::hir. 936 */ 937 bool is_void; 938 }; 939 940 941 class ast_function : public ast_node { 942 public: 943 ast_function(void); 944 945 virtual void print(void) const; 946 947 virtual ir_rvalue *hir(exec_list *instructions, 948 struct _mesa_glsl_parse_state *state); 949 950 ast_fully_specified_type *return_type; 951 const char *identifier; 952 953 exec_list parameters; 954 955 private: 956 /** 957 * Is this prototype part of the function definition? 958 * 959 * Used by ast_function_definition::hir to process the parameters, etc. 960 * of the function. 961 * 962 * \sa ::hir 963 */ 964 bool is_definition; 965 966 /** 967 * Function signature corresponding to this function prototype instance 968 * 969 * Used by ast_function_definition::hir to process the parameters, etc. 970 * of the function. 971 * 972 * \sa ::hir 973 */ 974 class ir_function_signature *signature; 975 976 friend class ast_function_definition; 977 }; 978 979 980 class ast_expression_statement : public ast_node { 981 public: 982 ast_expression_statement(ast_expression *); 983 virtual void print(void) const; 984 985 virtual ir_rvalue *hir(exec_list *instructions, 986 struct _mesa_glsl_parse_state *state); 987 988 ast_expression *expression; 989 }; 990 991 992 class ast_case_label : public ast_node { 993 public: 994 ast_case_label(ast_expression *test_value); 995 virtual void print(void) const; 996 997 virtual ir_rvalue *hir(exec_list *instructions, 998 struct _mesa_glsl_parse_state *state); 999 1000 /** 1001 * An test value of NULL means 'default'. 1002 */ 1003 ast_expression *test_value; 1004 }; 1005 1006 1007 class ast_case_label_list : public ast_node { 1008 public: 1009 ast_case_label_list(void); 1010 virtual void print(void) const; 1011 1012 virtual ir_rvalue *hir(exec_list *instructions, 1013 struct _mesa_glsl_parse_state *state); 1014 1015 /** 1016 * A list of case labels. 1017 */ 1018 exec_list labels; 1019 }; 1020 1021 1022 class ast_case_statement : public ast_node { 1023 public: 1024 ast_case_statement(ast_case_label_list *labels); 1025 virtual void print(void) const; 1026 1027 virtual ir_rvalue *hir(exec_list *instructions, 1028 struct _mesa_glsl_parse_state *state); 1029 1030 ast_case_label_list *labels; 1031 1032 /** 1033 * A list of statements. 1034 */ 1035 exec_list stmts; 1036 }; 1037 1038 1039 class ast_case_statement_list : public ast_node { 1040 public: 1041 ast_case_statement_list(void); 1042 virtual void print(void) const; 1043 1044 virtual ir_rvalue *hir(exec_list *instructions, 1045 struct _mesa_glsl_parse_state *state); 1046 1047 /** 1048 * A list of cases. 1049 */ 1050 exec_list cases; 1051 }; 1052 1053 1054 class ast_switch_body : public ast_node { 1055 public: 1056 ast_switch_body(ast_case_statement_list *stmts); 1057 virtual void print(void) const; 1058 1059 virtual ir_rvalue *hir(exec_list *instructions, 1060 struct _mesa_glsl_parse_state *state); 1061 1062 ast_case_statement_list *stmts; 1063 }; 1064 1065 1066 class ast_selection_statement : public ast_node { 1067 public: 1068 ast_selection_statement(ast_expression *condition, 1069 ast_node *then_statement, 1070 ast_node *else_statement); 1071 virtual void print(void) const; 1072 1073 virtual ir_rvalue *hir(exec_list *instructions, 1074 struct _mesa_glsl_parse_state *state); 1075 1076 ast_expression *condition; 1077 ast_node *then_statement; 1078 ast_node *else_statement; 1079 }; 1080 1081 1082 class ast_switch_statement : public ast_node { 1083 public: 1084 ast_switch_statement(ast_expression *test_expression, 1085 ast_node *body); 1086 virtual void print(void) const; 1087 1088 virtual ir_rvalue *hir(exec_list *instructions, 1089 struct _mesa_glsl_parse_state *state); 1090 1091 ast_expression *test_expression; 1092 ast_node *body; 1093 1094 protected: 1095 void test_to_hir(exec_list *, struct _mesa_glsl_parse_state *); 1096 }; 1097 1098 class ast_iteration_statement : public ast_node { 1099 public: 1100 ast_iteration_statement(int mode, ast_node *init, ast_node *condition, 1101 ast_expression *rest_expression, ast_node *body); 1102 1103 virtual void print(void) const; 1104 1105 virtual ir_rvalue *hir(exec_list *, struct _mesa_glsl_parse_state *); 1106 1107 enum ast_iteration_modes { 1108 ast_for, 1109 ast_while, 1110 ast_do_while 1111 } mode; 1112 1113 1114 ast_node *init_statement; 1115 ast_node *condition; 1116 ast_expression *rest_expression; 1117 1118 ast_node *body; 1119 1120 /** 1121 * Generate IR from the condition of a loop 1122 * 1123 * This is factored out of ::hir because some loops have the condition 1124 * test at the top (for and while), and others have it at the end (do-while). 1125 */ 1126 void condition_to_hir(exec_list *, struct _mesa_glsl_parse_state *); 1127 }; 1128 1129 1130 class ast_jump_statement : public ast_node { 1131 public: 1132 ast_jump_statement(int mode, ast_expression *return_value); 1133 virtual void print(void) const; 1134 1135 virtual ir_rvalue *hir(exec_list *instructions, 1136 struct _mesa_glsl_parse_state *state); 1137 1138 enum ast_jump_modes { 1139 ast_continue, 1140 ast_break, 1141 ast_return, 1142 ast_discard 1143 } mode; 1144 1145 ast_expression *opt_return_value; 1146 }; 1147 1148 1149 class ast_function_definition : public ast_node { 1150 public: 1151 ast_function_definition() : prototype(NULL), body(NULL) 1152 { 1153 } 1154 1155 virtual void print(void) const; 1156 1157 virtual ir_rvalue *hir(exec_list *instructions, 1158 struct _mesa_glsl_parse_state *state); 1159 1160 ast_function *prototype; 1161 ast_compound_statement *body; 1162 }; 1163 1164 class ast_interface_block : public ast_node { 1165 public: 1166 ast_interface_block(const char *instance_name, 1167 ast_array_specifier *array_specifier) 1168 : block_name(NULL), instance_name(instance_name), 1169 array_specifier(array_specifier) 1170 { 1171 } 1172 1173 virtual ir_rvalue *hir(exec_list *instructions, 1174 struct _mesa_glsl_parse_state *state); 1175 1176 ast_type_qualifier default_layout; 1177 ast_type_qualifier layout; 1178 const char *block_name; 1179 1180 /** 1181 * Declared name of the block instance, if specified. 1182 * 1183 * If the block does not have an instance name, this field will be 1184 * \c NULL. 1185 */ 1186 const char *instance_name; 1187 1188 /** List of ast_declarator_list * */ 1189 exec_list declarations; 1190 1191 /** 1192 * Declared array size of the block instance 1193 * 1194 * If the block is not declared as an array or if the block instance array 1195 * is unsized, this field will be \c NULL. 1196 */ 1197 ast_array_specifier *array_specifier; 1198 }; 1199 1200 1201 /** 1202 * AST node representing a declaration of the output layout for tessellation 1203 * control shaders. 1204 */ 1205 class ast_tcs_output_layout : public ast_node 1206 { 1207 public: 1208 ast_tcs_output_layout(const struct YYLTYPE &locp) 1209 { 1210 set_location(locp); 1211 } 1212 1213 virtual ir_rvalue *hir(exec_list *instructions, 1214 struct _mesa_glsl_parse_state *state); 1215 }; 1216 1217 1218 /** 1219 * AST node representing a declaration of the input layout for geometry 1220 * shaders. 1221 */ 1222 class ast_gs_input_layout : public ast_node 1223 { 1224 public: 1225 ast_gs_input_layout(const struct YYLTYPE &locp, GLenum prim_type) 1226 : prim_type(prim_type) 1227 { 1228 set_location(locp); 1229 } 1230 1231 virtual ir_rvalue *hir(exec_list *instructions, 1232 struct _mesa_glsl_parse_state *state); 1233 1234 private: 1235 const GLenum prim_type; 1236 }; 1237 1238 1239 /** 1240 * AST node representing a decalaration of the input layout for compute 1241 * shaders. 1242 */ 1243 class ast_cs_input_layout : public ast_node 1244 { 1245 public: 1246 ast_cs_input_layout(const struct YYLTYPE &locp, 1247 ast_layout_expression *const *local_size) 1248 { 1249 for (int i = 0; i < 3; i++) { 1250 this->local_size[i] = local_size[i]; 1251 } 1252 set_location(locp); 1253 } 1254 1255 virtual ir_rvalue *hir(exec_list *instructions, 1256 struct _mesa_glsl_parse_state *state); 1257 1258 private: 1259 ast_layout_expression *local_size[3]; 1260 }; 1261 1262 /*@}*/ 1263 1264 extern void 1265 _mesa_ast_to_hir(exec_list *instructions, struct _mesa_glsl_parse_state *state); 1266 1267 extern ir_rvalue * 1268 _mesa_ast_field_selection_to_hir(const ast_expression *expr, 1269 exec_list *instructions, 1270 struct _mesa_glsl_parse_state *state); 1271 1272 extern ir_rvalue * 1273 _mesa_ast_array_index_to_hir(void *mem_ctx, 1274 struct _mesa_glsl_parse_state *state, 1275 ir_rvalue *array, ir_rvalue *idx, 1276 YYLTYPE &loc, YYLTYPE &idx_loc); 1277 1278 extern void 1279 _mesa_ast_set_aggregate_type(const glsl_type *type, 1280 ast_expression *expr); 1281 1282 void 1283 emit_function(_mesa_glsl_parse_state *state, ir_function *f); 1284 1285 extern void 1286 check_builtin_array_max_size(const char *name, unsigned size, 1287 YYLTYPE loc, struct _mesa_glsl_parse_state *state); 1288 1289 extern void _mesa_ast_process_interface_block(YYLTYPE *locp, 1290 _mesa_glsl_parse_state *state, 1291 ast_interface_block *const block, 1292 const struct ast_type_qualifier &q); 1293 1294 extern bool 1295 process_qualifier_constant(struct _mesa_glsl_parse_state *state, 1296 YYLTYPE *loc, 1297 const char *qual_indentifier, 1298 ast_expression *const_expression, 1299 unsigned *value); 1300 #endif /* AST_H */ 1301
