2 * Copyright © 2010 Intel Corporation
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:
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
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.
26 * Convert abstract syntax to to high-level intermediate reprensentation (HIR).
28 * During the conversion to HIR, the majority of the symantic checking is
29 * preformed on the program. This includes:
31 * * Symbol table management
35 * The majority of this work could be done during parsing, and the parser could
36 * probably generate HIR directly. However, this results in frequent changes
37 * to the parser code. Since we do not assume that every system this complier
38 * is built on will have Flex and Bison installed, we have to store the code
39 * generated by these tools in our version control system. In other parts of
40 * the system we've seen problems where a parser was changed but the generated
41 * code was not committed, merge conflicts where created because two developers
42 * had slightly different versions of Bison installed, etc.
44 * I have also noticed that running Bison generated parsers in GDB is very
45 * irritating. When you get a segfault on '$$ = $1->foo', you can't very
46 * well 'print $1' in GDB.
48 * As a result, my preference is to put as little C code as possible in the
49 * parser (and lexer) sources.
52 #include "main/core.h" /* for struct gl_extensions */
53 #include "glsl_symbol_table.h"
54 #include "glsl_parser_extras.h"
56 #include "glsl_types.h"
60 _mesa_ast_to_hir(exec_list
*instructions
, struct _mesa_glsl_parse_state
*state
)
62 _mesa_glsl_initialize_variables(instructions
, state
);
63 _mesa_glsl_initialize_functions(instructions
, state
);
65 state
->symbols
->language_version
= state
->language_version
;
67 state
->current_function
= NULL
;
69 /* Section 4.2 of the GLSL 1.20 specification states:
70 * "The built-in functions are scoped in a scope outside the global scope
71 * users declare global variables in. That is, a shader's global scope,
72 * available for user-defined functions and global variables, is nested
73 * inside the scope containing the built-in functions."
75 * Since built-in functions like ftransform() access built-in variables,
76 * it follows that those must be in the outer scope as well.
78 * We push scope here to create this nesting effect...but don't pop.
79 * This way, a shader's globals are still in the symbol table for use
82 state
->symbols
->push_scope();
84 foreach_list_typed (ast_node
, ast
, link
, & state
->translation_unit
)
85 ast
->hir(instructions
, state
);
90 * If a conversion is available, convert one operand to a different type
92 * The \c from \c ir_rvalue is converted "in place".
94 * \param to Type that the operand it to be converted to
95 * \param from Operand that is being converted
96 * \param state GLSL compiler state
99 * If a conversion is possible (or unnecessary), \c true is returned.
100 * Otherwise \c false is returned.
103 apply_implicit_conversion(const glsl_type
*to
, ir_rvalue
* &from
,
104 struct _mesa_glsl_parse_state
*state
)
107 if (to
->base_type
== from
->type
->base_type
)
110 /* This conversion was added in GLSL 1.20. If the compilation mode is
111 * GLSL 1.10, the conversion is skipped.
113 if (state
->language_version
< 120)
116 /* From page 27 (page 33 of the PDF) of the GLSL 1.50 spec:
118 * "There are no implicit array or structure conversions. For
119 * example, an array of int cannot be implicitly converted to an
120 * array of float. There are no implicit conversions between
121 * signed and unsigned integers."
123 /* FINISHME: The above comment is partially a lie. There is int/uint
124 * FINISHME: conversion for immediate constants.
126 if (!to
->is_float() || !from
->type
->is_numeric())
129 /* Convert to a floating point type with the same number of components
130 * as the original type - i.e. int to float, not int to vec4.
132 to
= glsl_type::get_instance(GLSL_TYPE_FLOAT
, from
->type
->vector_elements
,
133 from
->type
->matrix_columns
);
135 switch (from
->type
->base_type
) {
137 from
= new(ctx
) ir_expression(ir_unop_i2f
, to
, from
, NULL
);
140 from
= new(ctx
) ir_expression(ir_unop_u2f
, to
, from
, NULL
);
143 from
= new(ctx
) ir_expression(ir_unop_b2f
, to
, from
, NULL
);
153 static const struct glsl_type
*
154 arithmetic_result_type(ir_rvalue
* &value_a
, ir_rvalue
* &value_b
,
156 struct _mesa_glsl_parse_state
*state
, YYLTYPE
*loc
)
158 const glsl_type
*type_a
= value_a
->type
;
159 const glsl_type
*type_b
= value_b
->type
;
161 /* From GLSL 1.50 spec, page 56:
163 * "The arithmetic binary operators add (+), subtract (-),
164 * multiply (*), and divide (/) operate on integer and
165 * floating-point scalars, vectors, and matrices."
167 if (!type_a
->is_numeric() || !type_b
->is_numeric()) {
168 _mesa_glsl_error(loc
, state
,
169 "Operands to arithmetic operators must be numeric");
170 return glsl_type::error_type
;
174 /* "If one operand is floating-point based and the other is
175 * not, then the conversions from Section 4.1.10 "Implicit
176 * Conversions" are applied to the non-floating-point-based operand."
178 if (!apply_implicit_conversion(type_a
, value_b
, state
)
179 && !apply_implicit_conversion(type_b
, value_a
, state
)) {
180 _mesa_glsl_error(loc
, state
,
181 "Could not implicitly convert operands to "
182 "arithmetic operator");
183 return glsl_type::error_type
;
185 type_a
= value_a
->type
;
186 type_b
= value_b
->type
;
188 /* "If the operands are integer types, they must both be signed or
191 * From this rule and the preceeding conversion it can be inferred that
192 * both types must be GLSL_TYPE_FLOAT, or GLSL_TYPE_UINT, or GLSL_TYPE_INT.
193 * The is_numeric check above already filtered out the case where either
194 * type is not one of these, so now the base types need only be tested for
197 if (type_a
->base_type
!= type_b
->base_type
) {
198 _mesa_glsl_error(loc
, state
,
199 "base type mismatch for arithmetic operator");
200 return glsl_type::error_type
;
203 /* "All arithmetic binary operators result in the same fundamental type
204 * (signed integer, unsigned integer, or floating-point) as the
205 * operands they operate on, after operand type conversion. After
206 * conversion, the following cases are valid
208 * * The two operands are scalars. In this case the operation is
209 * applied, resulting in a scalar."
211 if (type_a
->is_scalar() && type_b
->is_scalar())
214 /* "* One operand is a scalar, and the other is a vector or matrix.
215 * In this case, the scalar operation is applied independently to each
216 * component of the vector or matrix, resulting in the same size
219 if (type_a
->is_scalar()) {
220 if (!type_b
->is_scalar())
222 } else if (type_b
->is_scalar()) {
226 /* All of the combinations of <scalar, scalar>, <vector, scalar>,
227 * <scalar, vector>, <scalar, matrix>, and <matrix, scalar> have been
230 assert(!type_a
->is_scalar());
231 assert(!type_b
->is_scalar());
233 /* "* The two operands are vectors of the same size. In this case, the
234 * operation is done component-wise resulting in the same size
237 if (type_a
->is_vector() && type_b
->is_vector()) {
238 if (type_a
== type_b
) {
241 _mesa_glsl_error(loc
, state
,
242 "vector size mismatch for arithmetic operator");
243 return glsl_type::error_type
;
247 /* All of the combinations of <scalar, scalar>, <vector, scalar>,
248 * <scalar, vector>, <scalar, matrix>, <matrix, scalar>, and
249 * <vector, vector> have been handled. At least one of the operands must
250 * be matrix. Further, since there are no integer matrix types, the base
251 * type of both operands must be float.
253 assert(type_a
->is_matrix() || type_b
->is_matrix());
254 assert(type_a
->base_type
== GLSL_TYPE_FLOAT
);
255 assert(type_b
->base_type
== GLSL_TYPE_FLOAT
);
257 /* "* The operator is add (+), subtract (-), or divide (/), and the
258 * operands are matrices with the same number of rows and the same
259 * number of columns. In this case, the operation is done component-
260 * wise resulting in the same size matrix."
261 * * The operator is multiply (*), where both operands are matrices or
262 * one operand is a vector and the other a matrix. A right vector
263 * operand is treated as a column vector and a left vector operand as a
264 * row vector. In all these cases, it is required that the number of
265 * columns of the left operand is equal to the number of rows of the
266 * right operand. Then, the multiply (*) operation does a linear
267 * algebraic multiply, yielding an object that has the same number of
268 * rows as the left operand and the same number of columns as the right
269 * operand. Section 5.10 "Vector and Matrix Operations" explains in
270 * more detail how vectors and matrices are operated on."
273 if (type_a
== type_b
)
276 if (type_a
->is_matrix() && type_b
->is_matrix()) {
277 /* Matrix multiply. The columns of A must match the rows of B. Given
278 * the other previously tested constraints, this means the vector type
279 * of a row from A must be the same as the vector type of a column from
282 if (type_a
->row_type() == type_b
->column_type()) {
283 /* The resulting matrix has the number of columns of matrix B and
284 * the number of rows of matrix A. We get the row count of A by
285 * looking at the size of a vector that makes up a column. The
286 * transpose (size of a row) is done for B.
288 const glsl_type
*const type
=
289 glsl_type::get_instance(type_a
->base_type
,
290 type_a
->column_type()->vector_elements
,
291 type_b
->row_type()->vector_elements
);
292 assert(type
!= glsl_type::error_type
);
296 } else if (type_a
->is_matrix()) {
297 /* A is a matrix and B is a column vector. Columns of A must match
298 * rows of B. Given the other previously tested constraints, this
299 * means the vector type of a row from A must be the same as the
300 * vector the type of B.
302 if (type_a
->row_type() == type_b
) {
303 /* The resulting vector has a number of elements equal to
304 * the number of rows of matrix A. */
305 const glsl_type
*const type
=
306 glsl_type::get_instance(type_a
->base_type
,
307 type_a
->column_type()->vector_elements
,
309 assert(type
!= glsl_type::error_type
);
314 assert(type_b
->is_matrix());
316 /* A is a row vector and B is a matrix. Columns of A must match rows
317 * of B. Given the other previously tested constraints, this means
318 * the type of A must be the same as the vector type of a column from
321 if (type_a
== type_b
->column_type()) {
322 /* The resulting vector has a number of elements equal to
323 * the number of columns of matrix B. */
324 const glsl_type
*const type
=
325 glsl_type::get_instance(type_a
->base_type
,
326 type_b
->row_type()->vector_elements
,
328 assert(type
!= glsl_type::error_type
);
334 _mesa_glsl_error(loc
, state
, "size mismatch for matrix multiplication");
335 return glsl_type::error_type
;
339 /* "All other cases are illegal."
341 _mesa_glsl_error(loc
, state
, "type mismatch");
342 return glsl_type::error_type
;
346 static const struct glsl_type
*
347 unary_arithmetic_result_type(const struct glsl_type
*type
,
348 struct _mesa_glsl_parse_state
*state
, YYLTYPE
*loc
)
350 /* From GLSL 1.50 spec, page 57:
352 * "The arithmetic unary operators negate (-), post- and pre-increment
353 * and decrement (-- and ++) operate on integer or floating-point
354 * values (including vectors and matrices). All unary operators work
355 * component-wise on their operands. These result with the same type
358 if (!type
->is_numeric()) {
359 _mesa_glsl_error(loc
, state
,
360 "Operands to arithmetic operators must be numeric");
361 return glsl_type::error_type
;
368 * \brief Return the result type of a bit-logic operation.
370 * If the given types to the bit-logic operator are invalid, return
371 * glsl_type::error_type.
373 * \param type_a Type of LHS of bit-logic op
374 * \param type_b Type of RHS of bit-logic op
376 static const struct glsl_type
*
377 bit_logic_result_type(const struct glsl_type
*type_a
,
378 const struct glsl_type
*type_b
,
380 struct _mesa_glsl_parse_state
*state
, YYLTYPE
*loc
)
382 if (state
->language_version
< 130) {
383 _mesa_glsl_error(loc
, state
, "bit operations require GLSL 1.30");
384 return glsl_type::error_type
;
387 /* From page 50 (page 56 of PDF) of GLSL 1.30 spec:
389 * "The bitwise operators and (&), exclusive-or (^), and inclusive-or
390 * (|). The operands must be of type signed or unsigned integers or
393 if (!type_a
->is_integer()) {
394 _mesa_glsl_error(loc
, state
, "LHS of `%s' must be an integer",
395 ast_expression::operator_string(op
));
396 return glsl_type::error_type
;
398 if (!type_b
->is_integer()) {
399 _mesa_glsl_error(loc
, state
, "RHS of `%s' must be an integer",
400 ast_expression::operator_string(op
));
401 return glsl_type::error_type
;
404 /* "The fundamental types of the operands (signed or unsigned) must
407 if (type_a
->base_type
!= type_b
->base_type
) {
408 _mesa_glsl_error(loc
, state
, "operands of `%s' must have the same "
409 "base type", ast_expression::operator_string(op
));
410 return glsl_type::error_type
;
413 /* "The operands cannot be vectors of differing size." */
414 if (type_a
->is_vector() &&
415 type_b
->is_vector() &&
416 type_a
->vector_elements
!= type_b
->vector_elements
) {
417 _mesa_glsl_error(loc
, state
, "operands of `%s' cannot be vectors of "
418 "different sizes", ast_expression::operator_string(op
));
419 return glsl_type::error_type
;
422 /* "If one operand is a scalar and the other a vector, the scalar is
423 * applied component-wise to the vector, resulting in the same type as
424 * the vector. The fundamental types of the operands [...] will be the
425 * resulting fundamental type."
427 if (type_a
->is_scalar())
433 static const struct glsl_type
*
434 modulus_result_type(const struct glsl_type
*type_a
,
435 const struct glsl_type
*type_b
,
436 struct _mesa_glsl_parse_state
*state
, YYLTYPE
*loc
)
438 /* From GLSL 1.50 spec, page 56:
439 * "The operator modulus (%) operates on signed or unsigned integers or
440 * integer vectors. The operand types must both be signed or both be
443 if (!type_a
->is_integer() || !type_b
->is_integer()
444 || (type_a
->base_type
!= type_b
->base_type
)) {
445 _mesa_glsl_error(loc
, state
, "type mismatch");
446 return glsl_type::error_type
;
449 /* "The operands cannot be vectors of differing size. If one operand is
450 * a scalar and the other vector, then the scalar is applied component-
451 * wise to the vector, resulting in the same type as the vector. If both
452 * are vectors of the same size, the result is computed component-wise."
454 if (type_a
->is_vector()) {
455 if (!type_b
->is_vector()
456 || (type_a
->vector_elements
== type_b
->vector_elements
))
461 /* "The operator modulus (%) is not defined for any other data types
462 * (non-integer types)."
464 _mesa_glsl_error(loc
, state
, "type mismatch");
465 return glsl_type::error_type
;
469 static const struct glsl_type
*
470 relational_result_type(ir_rvalue
* &value_a
, ir_rvalue
* &value_b
,
471 struct _mesa_glsl_parse_state
*state
, YYLTYPE
*loc
)
473 const glsl_type
*type_a
= value_a
->type
;
474 const glsl_type
*type_b
= value_b
->type
;
476 /* From GLSL 1.50 spec, page 56:
477 * "The relational operators greater than (>), less than (<), greater
478 * than or equal (>=), and less than or equal (<=) operate only on
479 * scalar integer and scalar floating-point expressions."
481 if (!type_a
->is_numeric()
482 || !type_b
->is_numeric()
483 || !type_a
->is_scalar()
484 || !type_b
->is_scalar()) {
485 _mesa_glsl_error(loc
, state
,
486 "Operands to relational operators must be scalar and "
488 return glsl_type::error_type
;
491 /* "Either the operands' types must match, or the conversions from
492 * Section 4.1.10 "Implicit Conversions" will be applied to the integer
493 * operand, after which the types must match."
495 if (!apply_implicit_conversion(type_a
, value_b
, state
)
496 && !apply_implicit_conversion(type_b
, value_a
, state
)) {
497 _mesa_glsl_error(loc
, state
,
498 "Could not implicitly convert operands to "
499 "relational operator");
500 return glsl_type::error_type
;
502 type_a
= value_a
->type
;
503 type_b
= value_b
->type
;
505 if (type_a
->base_type
!= type_b
->base_type
) {
506 _mesa_glsl_error(loc
, state
, "base type mismatch");
507 return glsl_type::error_type
;
510 /* "The result is scalar Boolean."
512 return glsl_type::bool_type
;
516 * \brief Return the result type of a bit-shift operation.
518 * If the given types to the bit-shift operator are invalid, return
519 * glsl_type::error_type.
521 * \param type_a Type of LHS of bit-shift op
522 * \param type_b Type of RHS of bit-shift op
524 static const struct glsl_type
*
525 shift_result_type(const struct glsl_type
*type_a
,
526 const struct glsl_type
*type_b
,
528 struct _mesa_glsl_parse_state
*state
, YYLTYPE
*loc
)
530 if (state
->language_version
< 130) {
531 _mesa_glsl_error(loc
, state
, "bit operations require GLSL 1.30");
532 return glsl_type::error_type
;
535 /* From page 50 (page 56 of the PDF) of the GLSL 1.30 spec:
537 * "The shift operators (<<) and (>>). For both operators, the operands
538 * must be signed or unsigned integers or integer vectors. One operand
539 * can be signed while the other is unsigned."
541 if (!type_a
->is_integer()) {
542 _mesa_glsl_error(loc
, state
, "LHS of operator %s must be an integer or "
543 "integer vector", ast_expression::operator_string(op
));
544 return glsl_type::error_type
;
547 if (!type_b
->is_integer()) {
548 _mesa_glsl_error(loc
, state
, "RHS of operator %s must be an integer or "
549 "integer vector", ast_expression::operator_string(op
));
550 return glsl_type::error_type
;
553 /* "If the first operand is a scalar, the second operand has to be
556 if (type_a
->is_scalar() && !type_b
->is_scalar()) {
557 _mesa_glsl_error(loc
, state
, "If the first operand of %s is scalar, the "
558 "second must be scalar as well",
559 ast_expression::operator_string(op
));
560 return glsl_type::error_type
;
563 /* If both operands are vectors, check that they have same number of
566 if (type_a
->is_vector() &&
567 type_b
->is_vector() &&
568 type_a
->vector_elements
!= type_b
->vector_elements
) {
569 _mesa_glsl_error(loc
, state
, "Vector operands to operator %s must "
570 "have same number of elements",
571 ast_expression::operator_string(op
));
572 return glsl_type::error_type
;
575 /* "In all cases, the resulting type will be the same type as the left
582 * Validates that a value can be assigned to a location with a specified type
584 * Validates that \c rhs can be assigned to some location. If the types are
585 * not an exact match but an automatic conversion is possible, \c rhs will be
589 * \c NULL if \c rhs cannot be assigned to a location with type \c lhs_type.
590 * Otherwise the actual RHS to be assigned will be returned. This may be
591 * \c rhs, or it may be \c rhs after some type conversion.
594 * In addition to being used for assignments, this function is used to
595 * type-check return values.
598 validate_assignment(struct _mesa_glsl_parse_state
*state
,
599 const glsl_type
*lhs_type
, ir_rvalue
*rhs
)
601 const glsl_type
*rhs_type
= rhs
->type
;
603 /* If there is already some error in the RHS, just return it. Anything
604 * else will lead to an avalanche of error message back to the user.
606 if (rhs_type
->is_error())
609 /* If the types are identical, the assignment can trivially proceed.
611 if (rhs_type
== lhs_type
)
614 /* If the array element types are the same and the size of the LHS is zero,
615 * the assignment is okay.
617 * Note: Whole-array assignments are not permitted in GLSL 1.10, but this
618 * is handled by ir_dereference::is_lvalue.
620 if (lhs_type
->is_array() && rhs
->type
->is_array()
621 && (lhs_type
->element_type() == rhs
->type
->element_type())
622 && (lhs_type
->array_size() == 0)) {
626 /* Check for implicit conversion in GLSL 1.20 */
627 if (apply_implicit_conversion(lhs_type
, rhs
, state
)) {
628 rhs_type
= rhs
->type
;
629 if (rhs_type
== lhs_type
)
637 do_assignment(exec_list
*instructions
, struct _mesa_glsl_parse_state
*state
,
638 ir_rvalue
*lhs
, ir_rvalue
*rhs
,
642 bool error_emitted
= (lhs
->type
->is_error() || rhs
->type
->is_error());
644 if (!error_emitted
) {
645 if (!lhs
->is_lvalue()) {
646 _mesa_glsl_error(& lhs_loc
, state
, "non-lvalue in assignment");
647 error_emitted
= true;
650 if (state
->es_shader
&& lhs
->type
->is_array()) {
651 _mesa_glsl_error(&lhs_loc
, state
, "whole array assignment is not "
652 "allowed in GLSL ES 1.00.");
653 error_emitted
= true;
657 ir_rvalue
*new_rhs
= validate_assignment(state
, lhs
->type
, rhs
);
658 if (new_rhs
== NULL
) {
659 _mesa_glsl_error(& lhs_loc
, state
, "type mismatch");
663 /* If the LHS array was not declared with a size, it takes it size from
664 * the RHS. If the LHS is an l-value and a whole array, it must be a
665 * dereference of a variable. Any other case would require that the LHS
666 * is either not an l-value or not a whole array.
668 if (lhs
->type
->array_size() == 0) {
669 ir_dereference
*const d
= lhs
->as_dereference();
673 ir_variable
*const var
= d
->variable_referenced();
677 if (var
->max_array_access
>= unsigned(rhs
->type
->array_size())) {
678 /* FINISHME: This should actually log the location of the RHS. */
679 _mesa_glsl_error(& lhs_loc
, state
, "array size must be > %u due to "
681 var
->max_array_access
);
684 var
->type
= glsl_type::get_array_instance(lhs
->type
->element_type(),
685 rhs
->type
->array_size());
690 /* Most callers of do_assignment (assign, add_assign, pre_inc/dec,
691 * but not post_inc) need the converted assigned value as an rvalue
692 * to handle things like:
696 * So we always just store the computed value being assigned to a
697 * temporary and return a deref of that temporary. If the rvalue
698 * ends up not being used, the temp will get copy-propagated out.
700 ir_variable
*var
= new(ctx
) ir_variable(rhs
->type
, "assignment_tmp",
702 ir_dereference_variable
*deref_var
= new(ctx
) ir_dereference_variable(var
);
703 instructions
->push_tail(var
);
704 instructions
->push_tail(new(ctx
) ir_assignment(deref_var
,
707 deref_var
= new(ctx
) ir_dereference_variable(var
);
710 instructions
->push_tail(new(ctx
) ir_assignment(lhs
, deref_var
, NULL
));
712 return new(ctx
) ir_dereference_variable(var
);
716 get_lvalue_copy(exec_list
*instructions
, ir_rvalue
*lvalue
)
718 void *ctx
= talloc_parent(lvalue
);
721 var
= new(ctx
) ir_variable(lvalue
->type
, "_post_incdec_tmp",
723 instructions
->push_tail(var
);
724 var
->mode
= ir_var_auto
;
726 instructions
->push_tail(new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(var
),
729 /* Once we've created this temporary, mark it read only so it's no
730 * longer considered an lvalue.
732 var
->read_only
= true;
734 return new(ctx
) ir_dereference_variable(var
);
739 ast_node::hir(exec_list
*instructions
,
740 struct _mesa_glsl_parse_state
*state
)
749 mark_whole_array_access(ir_rvalue
*access
)
751 ir_dereference_variable
*deref
= access
->as_dereference_variable();
754 deref
->var
->max_array_access
= deref
->type
->length
- 1;
759 do_comparison(void *mem_ctx
, int operation
, ir_rvalue
*op0
, ir_rvalue
*op1
)
762 ir_rvalue
*cmp
= NULL
;
764 if (operation
== ir_binop_all_equal
)
765 join_op
= ir_binop_logic_and
;
767 join_op
= ir_binop_logic_or
;
769 switch (op0
->type
->base_type
) {
770 case GLSL_TYPE_FLOAT
:
774 return new(mem_ctx
) ir_expression(operation
, op0
, op1
);
776 case GLSL_TYPE_ARRAY
: {
777 for (unsigned int i
= 0; i
< op0
->type
->length
; i
++) {
778 ir_rvalue
*e0
, *e1
, *result
;
780 e0
= new(mem_ctx
) ir_dereference_array(op0
->clone(mem_ctx
, NULL
),
781 new(mem_ctx
) ir_constant(i
));
782 e1
= new(mem_ctx
) ir_dereference_array(op1
->clone(mem_ctx
, NULL
),
783 new(mem_ctx
) ir_constant(i
));
784 result
= do_comparison(mem_ctx
, operation
, e0
, e1
);
787 cmp
= new(mem_ctx
) ir_expression(join_op
, cmp
, result
);
793 mark_whole_array_access(op0
);
794 mark_whole_array_access(op1
);
798 case GLSL_TYPE_STRUCT
: {
799 for (unsigned int i
= 0; i
< op0
->type
->length
; i
++) {
800 ir_rvalue
*e0
, *e1
, *result
;
801 const char *field_name
= op0
->type
->fields
.structure
[i
].name
;
803 e0
= new(mem_ctx
) ir_dereference_record(op0
->clone(mem_ctx
, NULL
),
805 e1
= new(mem_ctx
) ir_dereference_record(op1
->clone(mem_ctx
, NULL
),
807 result
= do_comparison(mem_ctx
, operation
, e0
, e1
);
810 cmp
= new(mem_ctx
) ir_expression(join_op
, cmp
, result
);
818 case GLSL_TYPE_ERROR
:
820 case GLSL_TYPE_SAMPLER
:
821 /* I assume a comparison of a struct containing a sampler just
822 * ignores the sampler present in the type.
827 assert(!"Should not get here.");
832 cmp
= new(mem_ctx
) ir_constant(true);
838 ast_expression::hir(exec_list
*instructions
,
839 struct _mesa_glsl_parse_state
*state
)
842 static const int operations
[AST_NUM_OPERATORS
] = {
843 -1, /* ast_assign doesn't convert to ir_expression. */
844 -1, /* ast_plus doesn't convert to ir_expression. */
868 /* Note: The following block of expression types actually convert
869 * to multiple IR instructions.
871 ir_binop_mul
, /* ast_mul_assign */
872 ir_binop_div
, /* ast_div_assign */
873 ir_binop_mod
, /* ast_mod_assign */
874 ir_binop_add
, /* ast_add_assign */
875 ir_binop_sub
, /* ast_sub_assign */
876 ir_binop_lshift
, /* ast_ls_assign */
877 ir_binop_rshift
, /* ast_rs_assign */
878 ir_binop_bit_and
, /* ast_and_assign */
879 ir_binop_bit_xor
, /* ast_xor_assign */
880 ir_binop_bit_or
, /* ast_or_assign */
882 -1, /* ast_conditional doesn't convert to ir_expression. */
883 ir_binop_add
, /* ast_pre_inc. */
884 ir_binop_sub
, /* ast_pre_dec. */
885 ir_binop_add
, /* ast_post_inc. */
886 ir_binop_sub
, /* ast_post_dec. */
887 -1, /* ast_field_selection doesn't conv to ir_expression. */
888 -1, /* ast_array_index doesn't convert to ir_expression. */
889 -1, /* ast_function_call doesn't conv to ir_expression. */
890 -1, /* ast_identifier doesn't convert to ir_expression. */
891 -1, /* ast_int_constant doesn't convert to ir_expression. */
892 -1, /* ast_uint_constant doesn't conv to ir_expression. */
893 -1, /* ast_float_constant doesn't conv to ir_expression. */
894 -1, /* ast_bool_constant doesn't conv to ir_expression. */
895 -1, /* ast_sequence doesn't convert to ir_expression. */
897 ir_rvalue
*result
= NULL
;
899 const struct glsl_type
*type
= glsl_type::error_type
;
900 bool error_emitted
= false;
903 loc
= this->get_location();
905 switch (this->oper
) {
907 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
908 op
[1] = this->subexpressions
[1]->hir(instructions
, state
);
910 result
= do_assignment(instructions
, state
, op
[0], op
[1],
911 this->subexpressions
[0]->get_location());
912 error_emitted
= result
->type
->is_error();
918 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
920 type
= unary_arithmetic_result_type(op
[0]->type
, state
, & loc
);
922 error_emitted
= type
->is_error();
928 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
930 type
= unary_arithmetic_result_type(op
[0]->type
, state
, & loc
);
932 error_emitted
= type
->is_error();
934 result
= new(ctx
) ir_expression(operations
[this->oper
], type
,
942 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
943 op
[1] = this->subexpressions
[1]->hir(instructions
, state
);
945 type
= arithmetic_result_type(op
[0], op
[1],
946 (this->oper
== ast_mul
),
948 error_emitted
= type
->is_error();
950 result
= new(ctx
) ir_expression(operations
[this->oper
], type
,
955 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
956 op
[1] = this->subexpressions
[1]->hir(instructions
, state
);
958 type
= modulus_result_type(op
[0]->type
, op
[1]->type
, state
, & loc
);
960 assert(operations
[this->oper
] == ir_binop_mod
);
962 result
= new(ctx
) ir_expression(operations
[this->oper
], type
,
964 error_emitted
= type
->is_error();
969 if (state
->language_version
< 130) {
970 _mesa_glsl_error(&loc
, state
, "operator %s requires GLSL 1.30",
971 operator_string(this->oper
));
972 error_emitted
= true;
975 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
976 op
[1] = this->subexpressions
[1]->hir(instructions
, state
);
977 type
= shift_result_type(op
[0]->type
, op
[1]->type
, this->oper
, state
,
979 result
= new(ctx
) ir_expression(operations
[this->oper
], type
,
981 error_emitted
= op
[0]->type
->is_error() || op
[1]->type
->is_error();
988 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
989 op
[1] = this->subexpressions
[1]->hir(instructions
, state
);
991 type
= relational_result_type(op
[0], op
[1], state
, & loc
);
993 /* The relational operators must either generate an error or result
994 * in a scalar boolean. See page 57 of the GLSL 1.50 spec.
996 assert(type
->is_error()
997 || ((type
->base_type
== GLSL_TYPE_BOOL
)
998 && type
->is_scalar()));
1000 result
= new(ctx
) ir_expression(operations
[this->oper
], type
,
1002 error_emitted
= type
->is_error();
1007 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
1008 op
[1] = this->subexpressions
[1]->hir(instructions
, state
);
1010 /* From page 58 (page 64 of the PDF) of the GLSL 1.50 spec:
1012 * "The equality operators equal (==), and not equal (!=)
1013 * operate on all types. They result in a scalar Boolean. If
1014 * the operand types do not match, then there must be a
1015 * conversion from Section 4.1.10 "Implicit Conversions"
1016 * applied to one operand that can make them match, in which
1017 * case this conversion is done."
1019 if ((!apply_implicit_conversion(op
[0]->type
, op
[1], state
)
1020 && !apply_implicit_conversion(op
[1]->type
, op
[0], state
))
1021 || (op
[0]->type
!= op
[1]->type
)) {
1022 _mesa_glsl_error(& loc
, state
, "operands of `%s' must have the same "
1023 "type", (this->oper
== ast_equal
) ? "==" : "!=");
1024 error_emitted
= true;
1025 } else if ((state
->language_version
<= 110)
1026 && (op
[0]->type
->is_array() || op
[1]->type
->is_array())) {
1027 _mesa_glsl_error(& loc
, state
, "array comparisons forbidden in "
1029 error_emitted
= true;
1032 result
= do_comparison(ctx
, operations
[this->oper
], op
[0], op
[1]);
1033 type
= glsl_type::bool_type
;
1035 assert(error_emitted
|| (result
->type
== glsl_type::bool_type
));
1041 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
1042 op
[1] = this->subexpressions
[1]->hir(instructions
, state
);
1043 type
= bit_logic_result_type(op
[0]->type
, op
[1]->type
, this->oper
,
1045 result
= new(ctx
) ir_expression(operations
[this->oper
], type
,
1047 error_emitted
= op
[0]->type
->is_error() || op
[1]->type
->is_error();
1051 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
1053 if (state
->language_version
< 130) {
1054 _mesa_glsl_error(&loc
, state
, "bit-wise operations require GLSL 1.30");
1055 error_emitted
= true;
1058 if (!op
[0]->type
->is_integer()) {
1059 _mesa_glsl_error(&loc
, state
, "operand of `~' must be an integer");
1060 error_emitted
= true;
1064 result
= new(ctx
) ir_expression(ir_unop_bit_not
, type
, op
[0], NULL
);
1067 case ast_logic_and
: {
1068 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
1070 if (!op
[0]->type
->is_boolean() || !op
[0]->type
->is_scalar()) {
1071 YYLTYPE loc
= this->subexpressions
[0]->get_location();
1073 _mesa_glsl_error(& loc
, state
, "LHS of `%s' must be scalar boolean",
1074 operator_string(this->oper
));
1075 error_emitted
= true;
1078 ir_constant
*op0_const
= op
[0]->constant_expression_value();
1080 if (op0_const
->value
.b
[0]) {
1081 op
[1] = this->subexpressions
[1]->hir(instructions
, state
);
1083 if (!op
[1]->type
->is_boolean() || !op
[1]->type
->is_scalar()) {
1084 YYLTYPE loc
= this->subexpressions
[1]->get_location();
1086 _mesa_glsl_error(& loc
, state
,
1087 "RHS of `%s' must be scalar boolean",
1088 operator_string(this->oper
));
1089 error_emitted
= true;
1095 type
= glsl_type::bool_type
;
1097 ir_variable
*const tmp
= new(ctx
) ir_variable(glsl_type::bool_type
,
1100 instructions
->push_tail(tmp
);
1102 ir_if
*const stmt
= new(ctx
) ir_if(op
[0]);
1103 instructions
->push_tail(stmt
);
1105 op
[1] = this->subexpressions
[1]->hir(&stmt
->then_instructions
, state
);
1107 if (!op
[1]->type
->is_boolean() || !op
[1]->type
->is_scalar()) {
1108 YYLTYPE loc
= this->subexpressions
[1]->get_location();
1110 _mesa_glsl_error(& loc
, state
,
1111 "RHS of `%s' must be scalar boolean",
1112 operator_string(this->oper
));
1113 error_emitted
= true;
1116 ir_dereference
*const then_deref
= new(ctx
) ir_dereference_variable(tmp
);
1117 ir_assignment
*const then_assign
=
1118 new(ctx
) ir_assignment(then_deref
, op
[1], NULL
);
1119 stmt
->then_instructions
.push_tail(then_assign
);
1121 ir_dereference
*const else_deref
= new(ctx
) ir_dereference_variable(tmp
);
1122 ir_assignment
*const else_assign
=
1123 new(ctx
) ir_assignment(else_deref
, new(ctx
) ir_constant(false), NULL
);
1124 stmt
->else_instructions
.push_tail(else_assign
);
1126 result
= new(ctx
) ir_dereference_variable(tmp
);
1132 case ast_logic_or
: {
1133 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
1135 if (!op
[0]->type
->is_boolean() || !op
[0]->type
->is_scalar()) {
1136 YYLTYPE loc
= this->subexpressions
[0]->get_location();
1138 _mesa_glsl_error(& loc
, state
, "LHS of `%s' must be scalar boolean",
1139 operator_string(this->oper
));
1140 error_emitted
= true;
1143 ir_constant
*op0_const
= op
[0]->constant_expression_value();
1145 if (op0_const
->value
.b
[0]) {
1148 op
[1] = this->subexpressions
[1]->hir(instructions
, state
);
1150 if (!op
[1]->type
->is_boolean() || !op
[1]->type
->is_scalar()) {
1151 YYLTYPE loc
= this->subexpressions
[1]->get_location();
1153 _mesa_glsl_error(& loc
, state
,
1154 "RHS of `%s' must be scalar boolean",
1155 operator_string(this->oper
));
1156 error_emitted
= true;
1160 type
= glsl_type::bool_type
;
1162 ir_variable
*const tmp
= new(ctx
) ir_variable(glsl_type::bool_type
,
1165 instructions
->push_tail(tmp
);
1167 ir_if
*const stmt
= new(ctx
) ir_if(op
[0]);
1168 instructions
->push_tail(stmt
);
1170 op
[1] = this->subexpressions
[1]->hir(&stmt
->else_instructions
, state
);
1172 if (!op
[1]->type
->is_boolean() || !op
[1]->type
->is_scalar()) {
1173 YYLTYPE loc
= this->subexpressions
[1]->get_location();
1175 _mesa_glsl_error(& loc
, state
, "RHS of `%s' must be scalar boolean",
1176 operator_string(this->oper
));
1177 error_emitted
= true;
1180 ir_dereference
*const then_deref
= new(ctx
) ir_dereference_variable(tmp
);
1181 ir_assignment
*const then_assign
=
1182 new(ctx
) ir_assignment(then_deref
, new(ctx
) ir_constant(true), NULL
);
1183 stmt
->then_instructions
.push_tail(then_assign
);
1185 ir_dereference
*const else_deref
= new(ctx
) ir_dereference_variable(tmp
);
1186 ir_assignment
*const else_assign
=
1187 new(ctx
) ir_assignment(else_deref
, op
[1], NULL
);
1188 stmt
->else_instructions
.push_tail(else_assign
);
1190 result
= new(ctx
) ir_dereference_variable(tmp
);
1197 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
1198 op
[1] = this->subexpressions
[1]->hir(instructions
, state
);
1201 result
= new(ctx
) ir_expression(operations
[this->oper
], glsl_type::bool_type
,
1203 type
= glsl_type::bool_type
;
1207 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
1209 if (!op
[0]->type
->is_boolean() || !op
[0]->type
->is_scalar()) {
1210 YYLTYPE loc
= this->subexpressions
[0]->get_location();
1212 _mesa_glsl_error(& loc
, state
,
1213 "operand of `!' must be scalar boolean");
1214 error_emitted
= true;
1217 result
= new(ctx
) ir_expression(operations
[this->oper
], glsl_type::bool_type
,
1219 type
= glsl_type::bool_type
;
1222 case ast_mul_assign
:
1223 case ast_div_assign
:
1224 case ast_add_assign
:
1225 case ast_sub_assign
: {
1226 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
1227 op
[1] = this->subexpressions
[1]->hir(instructions
, state
);
1229 type
= arithmetic_result_type(op
[0], op
[1],
1230 (this->oper
== ast_mul_assign
),
1233 ir_rvalue
*temp_rhs
= new(ctx
) ir_expression(operations
[this->oper
], type
,
1236 result
= do_assignment(instructions
, state
,
1237 op
[0]->clone(ctx
, NULL
), temp_rhs
,
1238 this->subexpressions
[0]->get_location());
1239 type
= result
->type
;
1240 error_emitted
= (op
[0]->type
->is_error());
1242 /* GLSL 1.10 does not allow array assignment. However, we don't have to
1243 * explicitly test for this because none of the binary expression
1244 * operators allow array operands either.
1250 case ast_mod_assign
: {
1251 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
1252 op
[1] = this->subexpressions
[1]->hir(instructions
, state
);
1254 type
= modulus_result_type(op
[0]->type
, op
[1]->type
, state
, & loc
);
1256 assert(operations
[this->oper
] == ir_binop_mod
);
1258 ir_rvalue
*temp_rhs
;
1259 temp_rhs
= new(ctx
) ir_expression(operations
[this->oper
], type
,
1262 result
= do_assignment(instructions
, state
,
1263 op
[0]->clone(ctx
, NULL
), temp_rhs
,
1264 this->subexpressions
[0]->get_location());
1265 type
= result
->type
;
1266 error_emitted
= type
->is_error();
1271 case ast_rs_assign
: {
1272 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
1273 op
[1] = this->subexpressions
[1]->hir(instructions
, state
);
1274 type
= shift_result_type(op
[0]->type
, op
[1]->type
, this->oper
, state
,
1276 ir_rvalue
*temp_rhs
= new(ctx
) ir_expression(operations
[this->oper
],
1277 type
, op
[0], op
[1]);
1278 result
= do_assignment(instructions
, state
, op
[0]->clone(ctx
, NULL
),
1280 this->subexpressions
[0]->get_location());
1281 error_emitted
= op
[0]->type
->is_error() || op
[1]->type
->is_error();
1285 case ast_and_assign
:
1286 case ast_xor_assign
:
1287 case ast_or_assign
: {
1288 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
1289 op
[1] = this->subexpressions
[1]->hir(instructions
, state
);
1290 type
= bit_logic_result_type(op
[0]->type
, op
[1]->type
, this->oper
,
1292 ir_rvalue
*temp_rhs
= new(ctx
) ir_expression(operations
[this->oper
],
1293 type
, op
[0], op
[1]);
1294 result
= do_assignment(instructions
, state
, op
[0]->clone(ctx
, NULL
),
1296 this->subexpressions
[0]->get_location());
1297 error_emitted
= op
[0]->type
->is_error() || op
[1]->type
->is_error();
1301 case ast_conditional
: {
1302 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
1304 /* From page 59 (page 65 of the PDF) of the GLSL 1.50 spec:
1306 * "The ternary selection operator (?:). It operates on three
1307 * expressions (exp1 ? exp2 : exp3). This operator evaluates the
1308 * first expression, which must result in a scalar Boolean."
1310 if (!op
[0]->type
->is_boolean() || !op
[0]->type
->is_scalar()) {
1311 YYLTYPE loc
= this->subexpressions
[0]->get_location();
1313 _mesa_glsl_error(& loc
, state
, "?: condition must be scalar boolean");
1314 error_emitted
= true;
1317 /* The :? operator is implemented by generating an anonymous temporary
1318 * followed by an if-statement. The last instruction in each branch of
1319 * the if-statement assigns a value to the anonymous temporary. This
1320 * temporary is the r-value of the expression.
1322 exec_list then_instructions
;
1323 exec_list else_instructions
;
1325 op
[1] = this->subexpressions
[1]->hir(&then_instructions
, state
);
1326 op
[2] = this->subexpressions
[2]->hir(&else_instructions
, state
);
1328 /* From page 59 (page 65 of the PDF) of the GLSL 1.50 spec:
1330 * "The second and third expressions can be any type, as
1331 * long their types match, or there is a conversion in
1332 * Section 4.1.10 "Implicit Conversions" that can be applied
1333 * to one of the expressions to make their types match. This
1334 * resulting matching type is the type of the entire
1337 if ((!apply_implicit_conversion(op
[1]->type
, op
[2], state
)
1338 && !apply_implicit_conversion(op
[2]->type
, op
[1], state
))
1339 || (op
[1]->type
!= op
[2]->type
)) {
1340 YYLTYPE loc
= this->subexpressions
[1]->get_location();
1342 _mesa_glsl_error(& loc
, state
, "Second and third operands of ?: "
1343 "operator must have matching types.");
1344 error_emitted
= true;
1345 type
= glsl_type::error_type
;
1350 /* From page 33 (page 39 of the PDF) of the GLSL 1.10 spec:
1352 * "The second and third expressions must be the same type, but can
1353 * be of any type other than an array."
1355 if ((state
->language_version
<= 110) && type
->is_array()) {
1356 _mesa_glsl_error(& loc
, state
, "Second and third operands of ?: "
1357 "operator must not be arrays.");
1358 error_emitted
= true;
1361 ir_constant
*cond_val
= op
[0]->constant_expression_value();
1362 ir_constant
*then_val
= op
[1]->constant_expression_value();
1363 ir_constant
*else_val
= op
[2]->constant_expression_value();
1365 if (then_instructions
.is_empty()
1366 && else_instructions
.is_empty()
1367 && (cond_val
!= NULL
) && (then_val
!= NULL
) && (else_val
!= NULL
)) {
1368 result
= (cond_val
->value
.b
[0]) ? then_val
: else_val
;
1370 ir_variable
*const tmp
=
1371 new(ctx
) ir_variable(type
, "conditional_tmp", ir_var_temporary
);
1372 instructions
->push_tail(tmp
);
1374 ir_if
*const stmt
= new(ctx
) ir_if(op
[0]);
1375 instructions
->push_tail(stmt
);
1377 then_instructions
.move_nodes_to(& stmt
->then_instructions
);
1378 ir_dereference
*const then_deref
=
1379 new(ctx
) ir_dereference_variable(tmp
);
1380 ir_assignment
*const then_assign
=
1381 new(ctx
) ir_assignment(then_deref
, op
[1], NULL
);
1382 stmt
->then_instructions
.push_tail(then_assign
);
1384 else_instructions
.move_nodes_to(& stmt
->else_instructions
);
1385 ir_dereference
*const else_deref
=
1386 new(ctx
) ir_dereference_variable(tmp
);
1387 ir_assignment
*const else_assign
=
1388 new(ctx
) ir_assignment(else_deref
, op
[2], NULL
);
1389 stmt
->else_instructions
.push_tail(else_assign
);
1391 result
= new(ctx
) ir_dereference_variable(tmp
);
1398 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
1399 if (op
[0]->type
->base_type
== GLSL_TYPE_FLOAT
)
1400 op
[1] = new(ctx
) ir_constant(1.0f
);
1402 op
[1] = new(ctx
) ir_constant(1);
1404 type
= arithmetic_result_type(op
[0], op
[1], false, state
, & loc
);
1406 ir_rvalue
*temp_rhs
;
1407 temp_rhs
= new(ctx
) ir_expression(operations
[this->oper
], type
,
1410 result
= do_assignment(instructions
, state
,
1411 op
[0]->clone(ctx
, NULL
), temp_rhs
,
1412 this->subexpressions
[0]->get_location());
1413 type
= result
->type
;
1414 error_emitted
= op
[0]->type
->is_error();
1419 case ast_post_dec
: {
1420 op
[0] = this->subexpressions
[0]->hir(instructions
, state
);
1421 if (op
[0]->type
->base_type
== GLSL_TYPE_FLOAT
)
1422 op
[1] = new(ctx
) ir_constant(1.0f
);
1424 op
[1] = new(ctx
) ir_constant(1);
1426 error_emitted
= op
[0]->type
->is_error() || op
[1]->type
->is_error();
1428 type
= arithmetic_result_type(op
[0], op
[1], false, state
, & loc
);
1430 ir_rvalue
*temp_rhs
;
1431 temp_rhs
= new(ctx
) ir_expression(operations
[this->oper
], type
,
1434 /* Get a temporary of a copy of the lvalue before it's modified.
1435 * This may get thrown away later.
1437 result
= get_lvalue_copy(instructions
, op
[0]->clone(ctx
, NULL
));
1439 (void)do_assignment(instructions
, state
,
1440 op
[0]->clone(ctx
, NULL
), temp_rhs
,
1441 this->subexpressions
[0]->get_location());
1443 type
= result
->type
;
1444 error_emitted
= op
[0]->type
->is_error();
1448 case ast_field_selection
:
1449 result
= _mesa_ast_field_selection_to_hir(this, instructions
, state
);
1450 type
= result
->type
;
1453 case ast_array_index
: {
1454 YYLTYPE index_loc
= subexpressions
[1]->get_location();
1456 op
[0] = subexpressions
[0]->hir(instructions
, state
);
1457 op
[1] = subexpressions
[1]->hir(instructions
, state
);
1459 error_emitted
= op
[0]->type
->is_error() || op
[1]->type
->is_error();
1461 ir_rvalue
*const array
= op
[0];
1463 result
= new(ctx
) ir_dereference_array(op
[0], op
[1]);
1465 /* Do not use op[0] after this point. Use array.
1473 if (!array
->type
->is_array()
1474 && !array
->type
->is_matrix()
1475 && !array
->type
->is_vector()) {
1476 _mesa_glsl_error(& index_loc
, state
,
1477 "cannot dereference non-array / non-matrix / "
1479 error_emitted
= true;
1482 if (!op
[1]->type
->is_integer()) {
1483 _mesa_glsl_error(& index_loc
, state
,
1484 "array index must be integer type");
1485 error_emitted
= true;
1486 } else if (!op
[1]->type
->is_scalar()) {
1487 _mesa_glsl_error(& index_loc
, state
,
1488 "array index must be scalar");
1489 error_emitted
= true;
1492 /* If the array index is a constant expression and the array has a
1493 * declared size, ensure that the access is in-bounds. If the array
1494 * index is not a constant expression, ensure that the array has a
1497 ir_constant
*const const_index
= op
[1]->constant_expression_value();
1498 if (const_index
!= NULL
) {
1499 const int idx
= const_index
->value
.i
[0];
1500 const char *type_name
;
1503 if (array
->type
->is_matrix()) {
1504 type_name
= "matrix";
1505 } else if (array
->type
->is_vector()) {
1506 type_name
= "vector";
1508 type_name
= "array";
1511 /* From page 24 (page 30 of the PDF) of the GLSL 1.50 spec:
1513 * "It is illegal to declare an array with a size, and then
1514 * later (in the same shader) index the same array with an
1515 * integral constant expression greater than or equal to the
1516 * declared size. It is also illegal to index an array with a
1517 * negative constant expression."
1519 if (array
->type
->is_matrix()) {
1520 if (array
->type
->row_type()->vector_elements
<= idx
) {
1521 bound
= array
->type
->row_type()->vector_elements
;
1523 } else if (array
->type
->is_vector()) {
1524 if (array
->type
->vector_elements
<= idx
) {
1525 bound
= array
->type
->vector_elements
;
1528 if ((array
->type
->array_size() > 0)
1529 && (array
->type
->array_size() <= idx
)) {
1530 bound
= array
->type
->array_size();
1535 _mesa_glsl_error(& loc
, state
, "%s index must be < %u",
1537 error_emitted
= true;
1538 } else if (idx
< 0) {
1539 _mesa_glsl_error(& loc
, state
, "%s index must be >= 0",
1541 error_emitted
= true;
1544 if (array
->type
->is_array()) {
1545 /* If the array is a variable dereference, it dereferences the
1546 * whole array, by definition. Use this to get the variable.
1548 * FINISHME: Should some methods for getting / setting / testing
1549 * FINISHME: array access limits be added to ir_dereference?
1551 ir_variable
*const v
= array
->whole_variable_referenced();
1552 if ((v
!= NULL
) && (unsigned(idx
) > v
->max_array_access
))
1553 v
->max_array_access
= idx
;
1555 } else if (array
->type
->array_size() == 0) {
1556 _mesa_glsl_error(&loc
, state
, "unsized array index must be constant");
1558 if (array
->type
->is_array()) {
1559 /* whole_variable_referenced can return NULL if the array is a
1560 * member of a structure. In this case it is safe to not update
1561 * the max_array_access field because it is never used for fields
1564 ir_variable
*v
= array
->whole_variable_referenced();
1566 v
->max_array_access
= array
->type
->array_size();
1571 result
->type
= glsl_type::error_type
;
1573 type
= result
->type
;
1577 case ast_function_call
:
1578 /* Should *NEVER* get here. ast_function_call should always be handled
1579 * by ast_function_expression::hir.
1584 case ast_identifier
: {
1585 /* ast_identifier can appear several places in a full abstract syntax
1586 * tree. This particular use must be at location specified in the grammar
1587 * as 'variable_identifier'.
1590 state
->symbols
->get_variable(this->primary_expression
.identifier
);
1592 result
= new(ctx
) ir_dereference_variable(var
);
1595 type
= result
->type
;
1597 _mesa_glsl_error(& loc
, state
, "`%s' undeclared",
1598 this->primary_expression
.identifier
);
1600 error_emitted
= true;
1605 case ast_int_constant
:
1606 type
= glsl_type::int_type
;
1607 result
= new(ctx
) ir_constant(this->primary_expression
.int_constant
);
1610 case ast_uint_constant
:
1611 type
= glsl_type::uint_type
;
1612 result
= new(ctx
) ir_constant(this->primary_expression
.uint_constant
);
1615 case ast_float_constant
:
1616 type
= glsl_type::float_type
;
1617 result
= new(ctx
) ir_constant(this->primary_expression
.float_constant
);
1620 case ast_bool_constant
:
1621 type
= glsl_type::bool_type
;
1622 result
= new(ctx
) ir_constant(bool(this->primary_expression
.bool_constant
));
1625 case ast_sequence
: {
1626 /* It should not be possible to generate a sequence in the AST without
1627 * any expressions in it.
1629 assert(!this->expressions
.is_empty());
1631 /* The r-value of a sequence is the last expression in the sequence. If
1632 * the other expressions in the sequence do not have side-effects (and
1633 * therefore add instructions to the instruction list), they get dropped
1636 foreach_list_typed (ast_node
, ast
, link
, &this->expressions
)
1637 result
= ast
->hir(instructions
, state
);
1639 type
= result
->type
;
1641 /* Any errors should have already been emitted in the loop above.
1643 error_emitted
= true;
1648 if (type
->is_error() && !error_emitted
)
1649 _mesa_glsl_error(& loc
, state
, "type mismatch");
1656 ast_expression_statement::hir(exec_list
*instructions
,
1657 struct _mesa_glsl_parse_state
*state
)
1659 /* It is possible to have expression statements that don't have an
1660 * expression. This is the solitary semicolon:
1662 * for (i = 0; i < 5; i++)
1665 * In this case the expression will be NULL. Test for NULL and don't do
1666 * anything in that case.
1668 if (expression
!= NULL
)
1669 expression
->hir(instructions
, state
);
1671 /* Statements do not have r-values.
1678 ast_compound_statement::hir(exec_list
*instructions
,
1679 struct _mesa_glsl_parse_state
*state
)
1682 state
->symbols
->push_scope();
1684 foreach_list_typed (ast_node
, ast
, link
, &this->statements
)
1685 ast
->hir(instructions
, state
);
1688 state
->symbols
->pop_scope();
1690 /* Compound statements do not have r-values.
1696 static const glsl_type
*
1697 process_array_type(YYLTYPE
*loc
, const glsl_type
*base
, ast_node
*array_size
,
1698 struct _mesa_glsl_parse_state
*state
)
1700 unsigned length
= 0;
1702 /* FINISHME: Reject delcarations of multidimensional arrays. */
1704 if (array_size
!= NULL
) {
1705 exec_list dummy_instructions
;
1706 ir_rvalue
*const ir
= array_size
->hir(& dummy_instructions
, state
);
1707 YYLTYPE loc
= array_size
->get_location();
1709 /* FINISHME: Verify that the grammar forbids side-effects in array
1710 * FINISHME: sizes. i.e., 'vec4 [x = 12] data'
1712 assert(dummy_instructions
.is_empty());
1715 if (!ir
->type
->is_integer()) {
1716 _mesa_glsl_error(& loc
, state
, "array size must be integer type");
1717 } else if (!ir
->type
->is_scalar()) {
1718 _mesa_glsl_error(& loc
, state
, "array size must be scalar type");
1720 ir_constant
*const size
= ir
->constant_expression_value();
1723 _mesa_glsl_error(& loc
, state
, "array size must be a "
1724 "constant valued expression");
1725 } else if (size
->value
.i
[0] <= 0) {
1726 _mesa_glsl_error(& loc
, state
, "array size must be > 0");
1728 assert(size
->type
== ir
->type
);
1729 length
= size
->value
.u
[0];
1733 } else if (state
->es_shader
) {
1734 /* Section 10.17 of the GLSL ES 1.00 specification states that unsized
1735 * array declarations have been removed from the language.
1737 _mesa_glsl_error(loc
, state
, "unsized array declarations are not "
1738 "allowed in GLSL ES 1.00.");
1741 return glsl_type::get_array_instance(base
, length
);
1746 ast_type_specifier::glsl_type(const char **name
,
1747 struct _mesa_glsl_parse_state
*state
) const
1749 const struct glsl_type
*type
;
1751 type
= state
->symbols
->get_type(this->type_name
);
1752 *name
= this->type_name
;
1754 if (this->is_array
) {
1755 YYLTYPE loc
= this->get_location();
1756 type
= process_array_type(&loc
, type
, this->array_size
, state
);
1764 apply_type_qualifier_to_variable(const struct ast_type_qualifier
*qual
,
1766 struct _mesa_glsl_parse_state
*state
,
1769 if (qual
->flags
.q
.invariant
)
1772 /* FINISHME: Mark 'in' variables at global scope as read-only. */
1773 if (qual
->flags
.q
.constant
|| qual
->flags
.q
.attribute
1774 || qual
->flags
.q
.uniform
1775 || (qual
->flags
.q
.varying
&& (state
->target
== fragment_shader
)))
1778 if (qual
->flags
.q
.centroid
)
1781 if (qual
->flags
.q
.attribute
&& state
->target
!= vertex_shader
) {
1782 var
->type
= glsl_type::error_type
;
1783 _mesa_glsl_error(loc
, state
,
1784 "`attribute' variables may not be declared in the "
1786 _mesa_glsl_shader_target_name(state
->target
));
1789 /* From page 25 (page 31 of the PDF) of the GLSL 1.10 spec:
1791 * "The varying qualifier can be used only with the data types
1792 * float, vec2, vec3, vec4, mat2, mat3, and mat4, or arrays of
1795 if (qual
->flags
.q
.varying
) {
1796 const glsl_type
*non_array_type
;
1798 if (var
->type
&& var
->type
->is_array())
1799 non_array_type
= var
->type
->fields
.array
;
1801 non_array_type
= var
->type
;
1803 if (non_array_type
&& non_array_type
->base_type
!= GLSL_TYPE_FLOAT
) {
1804 var
->type
= glsl_type::error_type
;
1805 _mesa_glsl_error(loc
, state
,
1806 "varying variables must be of base type float");
1810 /* If there is no qualifier that changes the mode of the variable, leave
1811 * the setting alone.
1813 if (qual
->flags
.q
.in
&& qual
->flags
.q
.out
)
1814 var
->mode
= ir_var_inout
;
1815 else if (qual
->flags
.q
.attribute
|| qual
->flags
.q
.in
1816 || (qual
->flags
.q
.varying
&& (state
->target
== fragment_shader
)))
1817 var
->mode
= ir_var_in
;
1818 else if (qual
->flags
.q
.out
1819 || (qual
->flags
.q
.varying
&& (state
->target
== vertex_shader
)))
1820 var
->mode
= ir_var_out
;
1821 else if (qual
->flags
.q
.uniform
)
1822 var
->mode
= ir_var_uniform
;
1824 if (qual
->flags
.q
.flat
)
1825 var
->interpolation
= ir_var_flat
;
1826 else if (qual
->flags
.q
.noperspective
)
1827 var
->interpolation
= ir_var_noperspective
;
1829 var
->interpolation
= ir_var_smooth
;
1831 var
->pixel_center_integer
= qual
->flags
.q
.pixel_center_integer
;
1832 var
->origin_upper_left
= qual
->flags
.q
.origin_upper_left
;
1833 if ((qual
->flags
.q
.origin_upper_left
|| qual
->flags
.q
.pixel_center_integer
)
1834 && (strcmp(var
->name
, "gl_FragCoord") != 0)) {
1835 const char *const qual_string
= (qual
->flags
.q
.origin_upper_left
)
1836 ? "origin_upper_left" : "pixel_center_integer";
1838 _mesa_glsl_error(loc
, state
,
1839 "layout qualifier `%s' can only be applied to "
1840 "fragment shader input `gl_FragCoord'",
1844 if (qual
->flags
.q
.explicit_location
) {
1845 const bool global_scope
= (state
->current_function
== NULL
);
1847 const char *string
= "";
1849 /* In the vertex shader only shader inputs can be given explicit
1852 * In the fragment shader only shader outputs can be given explicit
1855 switch (state
->target
) {
1857 if (!global_scope
|| (var
->mode
!= ir_var_in
)) {
1863 case geometry_shader
:
1864 _mesa_glsl_error(loc
, state
,
1865 "geometry shader variables cannot be given "
1866 "explicit locations\n");
1869 case fragment_shader
:
1870 if (!global_scope
|| (var
->mode
!= ir_var_in
)) {
1878 _mesa_glsl_error(loc
, state
,
1879 "only %s shader %s variables can be given an "
1880 "explicit location\n",
1881 _mesa_glsl_shader_target_name(state
->target
),
1884 var
->explicit_location
= true;
1886 /* This bit of silliness is needed because invalid explicit locations
1887 * are supposed to be flagged during linking. Small negative values
1888 * biased by VERT_ATTRIB_GENERIC0 or FRAG_RESULT_DATA0 could alias
1889 * built-in values (e.g., -16+VERT_ATTRIB_GENERIC0 = VERT_ATTRIB_POS).
1890 * The linker needs to be able to differentiate these cases. This
1891 * ensures that negative values stay negative.
1893 if (qual
->location
>= 0) {
1894 var
->location
= (state
->target
== vertex_shader
)
1895 ? (qual
->location
+ VERT_ATTRIB_GENERIC0
)
1896 : (qual
->location
+ FRAG_RESULT_DATA0
);
1898 var
->location
= qual
->location
;
1903 if (var
->type
->is_array() && state
->language_version
!= 110) {
1904 var
->array_lvalue
= true;
1910 ast_declarator_list::hir(exec_list
*instructions
,
1911 struct _mesa_glsl_parse_state
*state
)
1914 const struct glsl_type
*decl_type
;
1915 const char *type_name
= NULL
;
1916 ir_rvalue
*result
= NULL
;
1917 YYLTYPE loc
= this->get_location();
1919 /* From page 46 (page 52 of the PDF) of the GLSL 1.50 spec:
1921 * "To ensure that a particular output variable is invariant, it is
1922 * necessary to use the invariant qualifier. It can either be used to
1923 * qualify a previously declared variable as being invariant
1925 * invariant gl_Position; // make existing gl_Position be invariant"
1927 * In these cases the parser will set the 'invariant' flag in the declarator
1928 * list, and the type will be NULL.
1930 if (this->invariant
) {
1931 assert(this->type
== NULL
);
1933 if (state
->current_function
!= NULL
) {
1934 _mesa_glsl_error(& loc
, state
,
1935 "All uses of `invariant' keyword must be at global "
1939 foreach_list_typed (ast_declaration
, decl
, link
, &this->declarations
) {
1940 assert(!decl
->is_array
);
1941 assert(decl
->array_size
== NULL
);
1942 assert(decl
->initializer
== NULL
);
1944 ir_variable
*const earlier
=
1945 state
->symbols
->get_variable(decl
->identifier
);
1946 if (earlier
== NULL
) {
1947 _mesa_glsl_error(& loc
, state
,
1948 "Undeclared variable `%s' cannot be marked "
1949 "invariant\n", decl
->identifier
);
1950 } else if ((state
->target
== vertex_shader
)
1951 && (earlier
->mode
!= ir_var_out
)) {
1952 _mesa_glsl_error(& loc
, state
,
1953 "`%s' cannot be marked invariant, vertex shader "
1954 "outputs only\n", decl
->identifier
);
1955 } else if ((state
->target
== fragment_shader
)
1956 && (earlier
->mode
!= ir_var_in
)) {
1957 _mesa_glsl_error(& loc
, state
,
1958 "`%s' cannot be marked invariant, fragment shader "
1959 "inputs only\n", decl
->identifier
);
1961 earlier
->invariant
= true;
1965 /* Invariant redeclarations do not have r-values.
1970 assert(this->type
!= NULL
);
1971 assert(!this->invariant
);
1973 /* The type specifier may contain a structure definition. Process that
1974 * before any of the variable declarations.
1976 (void) this->type
->specifier
->hir(instructions
, state
);
1978 decl_type
= this->type
->specifier
->glsl_type(& type_name
, state
);
1979 if (this->declarations
.is_empty()) {
1980 /* The only valid case where the declaration list can be empty is when
1981 * the declaration is setting the default precision of a built-in type
1982 * (e.g., 'precision highp vec4;').
1985 if (decl_type
!= NULL
) {
1987 _mesa_glsl_error(& loc
, state
, "incomplete declaration");
1991 foreach_list_typed (ast_declaration
, decl
, link
, &this->declarations
) {
1992 const struct glsl_type
*var_type
;
1995 /* FINISHME: Emit a warning if a variable declaration shadows a
1996 * FINISHME: declaration at a higher scope.
1999 if ((decl_type
== NULL
) || decl_type
->is_void()) {
2000 if (type_name
!= NULL
) {
2001 _mesa_glsl_error(& loc
, state
,
2002 "invalid type `%s' in declaration of `%s'",
2003 type_name
, decl
->identifier
);
2005 _mesa_glsl_error(& loc
, state
,
2006 "invalid type in declaration of `%s'",
2012 if (decl
->is_array
) {
2013 var_type
= process_array_type(&loc
, decl_type
, decl
->array_size
,
2016 var_type
= decl_type
;
2019 var
= new(ctx
) ir_variable(var_type
, decl
->identifier
, ir_var_auto
);
2021 /* From page 22 (page 28 of the PDF) of the GLSL 1.10 specification;
2023 * "Global variables can only use the qualifiers const,
2024 * attribute, uni form, or varying. Only one may be
2027 * Local variables can only use the qualifier const."
2029 * This is relaxed in GLSL 1.30.
2031 if (state
->language_version
< 120) {
2032 if (this->type
->qualifier
.flags
.q
.out
) {
2033 _mesa_glsl_error(& loc
, state
,
2034 "`out' qualifier in declaration of `%s' "
2035 "only valid for function parameters in GLSL 1.10.",
2038 if (this->type
->qualifier
.flags
.q
.in
) {
2039 _mesa_glsl_error(& loc
, state
,
2040 "`in' qualifier in declaration of `%s' "
2041 "only valid for function parameters in GLSL 1.10.",
2044 /* FINISHME: Test for other invalid qualifiers. */
2047 apply_type_qualifier_to_variable(& this->type
->qualifier
, var
, state
,
2050 if (this->type
->qualifier
.flags
.q
.invariant
) {
2051 if ((state
->target
== vertex_shader
) && !(var
->mode
== ir_var_out
||
2052 var
->mode
== ir_var_inout
)) {
2053 /* FINISHME: Note that this doesn't work for invariant on
2054 * a function signature outval
2056 _mesa_glsl_error(& loc
, state
,
2057 "`%s' cannot be marked invariant, vertex shader "
2058 "outputs only\n", var
->name
);
2059 } else if ((state
->target
== fragment_shader
) &&
2060 !(var
->mode
== ir_var_in
|| var
->mode
== ir_var_inout
)) {
2061 /* FINISHME: Note that this doesn't work for invariant on
2062 * a function signature inval
2064 _mesa_glsl_error(& loc
, state
,
2065 "`%s' cannot be marked invariant, fragment shader "
2066 "inputs only\n", var
->name
);
2070 if (state
->current_function
!= NULL
) {
2071 const char *mode
= NULL
;
2072 const char *extra
= "";
2074 /* There is no need to check for 'inout' here because the parser will
2075 * only allow that in function parameter lists.
2077 if (this->type
->qualifier
.flags
.q
.attribute
) {
2079 } else if (this->type
->qualifier
.flags
.q
.uniform
) {
2081 } else if (this->type
->qualifier
.flags
.q
.varying
) {
2083 } else if (this->type
->qualifier
.flags
.q
.in
) {
2085 extra
= " or in function parameter list";
2086 } else if (this->type
->qualifier
.flags
.q
.out
) {
2088 extra
= " or in function parameter list";
2092 _mesa_glsl_error(& loc
, state
,
2093 "%s variable `%s' must be declared at "
2095 mode
, var
->name
, extra
);
2097 } else if (var
->mode
== ir_var_in
) {
2098 if (state
->target
== vertex_shader
) {
2099 bool error_emitted
= false;
2101 /* From page 31 (page 37 of the PDF) of the GLSL 1.50 spec:
2103 * "Vertex shader inputs can only be float, floating-point
2104 * vectors, matrices, signed and unsigned integers and integer
2105 * vectors. Vertex shader inputs can also form arrays of these
2106 * types, but not structures."
2108 * From page 31 (page 27 of the PDF) of the GLSL 1.30 spec:
2110 * "Vertex shader inputs can only be float, floating-point
2111 * vectors, matrices, signed and unsigned integers and integer
2112 * vectors. They cannot be arrays or structures."
2114 * From page 23 (page 29 of the PDF) of the GLSL 1.20 spec:
2116 * "The attribute qualifier can be used only with float,
2117 * floating-point vectors, and matrices. Attribute variables
2118 * cannot be declared as arrays or structures."
2120 const glsl_type
*check_type
= var
->type
->is_array()
2121 ? var
->type
->fields
.array
: var
->type
;
2123 switch (check_type
->base_type
) {
2124 case GLSL_TYPE_FLOAT
:
2126 case GLSL_TYPE_UINT
:
2128 if (state
->language_version
> 120)
2132 _mesa_glsl_error(& loc
, state
,
2133 "vertex shader input / attribute cannot have "
2135 var
->type
->is_array() ? "array of " : "",
2137 error_emitted
= true;
2140 if (!error_emitted
&& (state
->language_version
<= 130)
2141 && var
->type
->is_array()) {
2142 _mesa_glsl_error(& loc
, state
,
2143 "vertex shader input / attribute cannot have "
2145 error_emitted
= true;
2150 /* Process the initializer and add its instructions to a temporary
2151 * list. This list will be added to the instruction stream (below) after
2152 * the declaration is added. This is done because in some cases (such as
2153 * redeclarations) the declaration may not actually be added to the
2154 * instruction stream.
2156 exec_list initializer_instructions
;
2157 if (decl
->initializer
!= NULL
) {
2158 YYLTYPE initializer_loc
= decl
->initializer
->get_location();
2160 /* From page 24 (page 30 of the PDF) of the GLSL 1.10 spec:
2162 * "All uniform variables are read-only and are initialized either
2163 * directly by an application via API commands, or indirectly by
2166 if ((state
->language_version
<= 110)
2167 && (var
->mode
== ir_var_uniform
)) {
2168 _mesa_glsl_error(& initializer_loc
, state
,
2169 "cannot initialize uniforms in GLSL 1.10");
2172 if (var
->type
->is_sampler()) {
2173 _mesa_glsl_error(& initializer_loc
, state
,
2174 "cannot initialize samplers");
2177 if ((var
->mode
== ir_var_in
) && (state
->current_function
== NULL
)) {
2178 _mesa_glsl_error(& initializer_loc
, state
,
2179 "cannot initialize %s shader input / %s",
2180 _mesa_glsl_shader_target_name(state
->target
),
2181 (state
->target
== vertex_shader
)
2182 ? "attribute" : "varying");
2185 ir_dereference
*const lhs
= new(ctx
) ir_dereference_variable(var
);
2186 ir_rvalue
*rhs
= decl
->initializer
->hir(&initializer_instructions
,
2189 /* Calculate the constant value if this is a const or uniform
2192 if (this->type
->qualifier
.flags
.q
.constant
2193 || this->type
->qualifier
.flags
.q
.uniform
) {
2194 ir_rvalue
*new_rhs
= validate_assignment(state
, var
->type
, rhs
);
2195 if (new_rhs
!= NULL
) {
2198 ir_constant
*constant_value
= rhs
->constant_expression_value();
2199 if (!constant_value
) {
2200 _mesa_glsl_error(& initializer_loc
, state
,
2201 "initializer of %s variable `%s' must be a "
2202 "constant expression",
2203 (this->type
->qualifier
.flags
.q
.constant
)
2204 ? "const" : "uniform",
2206 if (var
->type
->is_numeric()) {
2207 /* Reduce cascading errors. */
2208 var
->constant_value
= ir_constant::zero(ctx
, var
->type
);
2211 rhs
= constant_value
;
2212 var
->constant_value
= constant_value
;
2215 _mesa_glsl_error(&initializer_loc
, state
,
2216 "initializer of type %s cannot be assigned to "
2217 "variable of type %s",
2218 rhs
->type
->name
, var
->type
->name
);
2219 if (var
->type
->is_numeric()) {
2220 /* Reduce cascading errors. */
2221 var
->constant_value
= ir_constant::zero(ctx
, var
->type
);
2226 if (rhs
&& !rhs
->type
->is_error()) {
2227 bool temp
= var
->read_only
;
2228 if (this->type
->qualifier
.flags
.q
.constant
)
2229 var
->read_only
= false;
2231 /* If the declared variable is an unsized array, it must inherrit
2232 * its full type from the initializer. A declaration such as
2234 * uniform float a[] = float[](1.0, 2.0, 3.0, 3.0);
2238 * uniform float a[4] = float[](1.0, 2.0, 3.0, 3.0);
2240 * The assignment generated in the if-statement (below) will also
2241 * automatically handle this case for non-uniforms.
2243 * If the declared variable is not an array, the types must
2244 * already match exactly. As a result, the type assignment
2245 * here can be done unconditionally.
2247 var
->type
= rhs
->type
;
2249 /* Never emit code to initialize a uniform.
2251 if (!this->type
->qualifier
.flags
.q
.uniform
)
2252 result
= do_assignment(&initializer_instructions
, state
,
2254 this->get_location());
2255 var
->read_only
= temp
;
2259 /* From page 23 (page 29 of the PDF) of the GLSL 1.10 spec:
2261 * "It is an error to write to a const variable outside of
2262 * its declaration, so they must be initialized when
2265 if (this->type
->qualifier
.flags
.q
.constant
&& decl
->initializer
== NULL
) {
2266 _mesa_glsl_error(& loc
, state
,
2267 "const declaration of `%s' must be initialized");
2270 /* Check if this declaration is actually a re-declaration, either to
2271 * resize an array or add qualifiers to an existing variable.
2273 * This is allowed for variables in the current scope, or when at
2274 * global scope (for built-ins in the implicit outer scope).
2276 ir_variable
*earlier
= state
->symbols
->get_variable(decl
->identifier
);
2277 if (earlier
!= NULL
&& (state
->current_function
== NULL
||
2278 state
->symbols
->name_declared_this_scope(decl
->identifier
))) {
2280 /* From page 24 (page 30 of the PDF) of the GLSL 1.50 spec,
2282 * "It is legal to declare an array without a size and then
2283 * later re-declare the same name as an array of the same
2284 * type and specify a size."
2286 if ((earlier
->type
->array_size() == 0)
2287 && var
->type
->is_array()
2288 && (var
->type
->element_type() == earlier
->type
->element_type())) {
2289 /* FINISHME: This doesn't match the qualifiers on the two
2290 * FINISHME: declarations. It's not 100% clear whether this is
2291 * FINISHME: required or not.
2294 /* From page 54 (page 60 of the PDF) of the GLSL 1.20 spec:
2296 * "The size [of gl_TexCoord] can be at most
2297 * gl_MaxTextureCoords."
2299 const unsigned size
= unsigned(var
->type
->array_size());
2300 if ((strcmp("gl_TexCoord", var
->name
) == 0)
2301 && (size
> state
->Const
.MaxTextureCoords
)) {
2302 YYLTYPE loc
= this->get_location();
2304 _mesa_glsl_error(& loc
, state
, "`gl_TexCoord' array size cannot "
2305 "be larger than gl_MaxTextureCoords (%u)\n",
2306 state
->Const
.MaxTextureCoords
);
2307 } else if ((size
> 0) && (size
<= earlier
->max_array_access
)) {
2308 YYLTYPE loc
= this->get_location();
2310 _mesa_glsl_error(& loc
, state
, "array size must be > %u due to "
2312 earlier
->max_array_access
);
2315 earlier
->type
= var
->type
;
2318 } else if (state
->ARB_fragment_coord_conventions_enable
2319 && strcmp(var
->name
, "gl_FragCoord") == 0
2320 && earlier
->type
== var
->type
2321 && earlier
->mode
== var
->mode
) {
2322 /* Allow redeclaration of gl_FragCoord for ARB_fcc layout
2325 earlier
->origin_upper_left
= var
->origin_upper_left
;
2326 earlier
->pixel_center_integer
= var
->pixel_center_integer
;
2328 YYLTYPE loc
= this->get_location();
2329 _mesa_glsl_error(&loc
, state
, "`%s' redeclared", decl
->identifier
);
2335 /* By now, we know it's a new variable declaration (we didn't hit the
2336 * above "continue").
2338 * From page 15 (page 21 of the PDF) of the GLSL 1.10 spec,
2340 * "Identifiers starting with "gl_" are reserved for use by
2341 * OpenGL, and may not be declared in a shader as either a
2342 * variable or a function."
2344 if (strncmp(decl
->identifier
, "gl_", 3) == 0)
2345 _mesa_glsl_error(& loc
, state
,
2346 "identifier `%s' uses reserved `gl_' prefix",
2349 /* Add the variable to the symbol table. Note that the initializer's
2350 * IR was already processed earlier (though it hasn't been emitted yet),
2351 * without the variable in scope.
2353 * This differs from most C-like languages, but it follows the GLSL
2354 * specification. From page 28 (page 34 of the PDF) of the GLSL 1.50
2357 * "Within a declaration, the scope of a name starts immediately
2358 * after the initializer if present or immediately after the name
2359 * being declared if not."
2361 if (!state
->symbols
->add_variable(var
)) {
2362 YYLTYPE loc
= this->get_location();
2363 _mesa_glsl_error(&loc
, state
, "name `%s' already taken in the "
2364 "current scope", decl
->identifier
);
2368 /* Push the variable declaration to the top. It means that all
2369 * the variable declarations will appear in a funny
2370 * last-to-first order, but otherwise we run into trouble if a
2371 * function is prototyped, a global var is decled, then the
2372 * function is defined with usage of the global var. See
2373 * glslparsertest's CorrectModule.frag.
2375 instructions
->push_head(var
);
2376 instructions
->append_list(&initializer_instructions
);
2380 /* Generally, variable declarations do not have r-values. However,
2381 * one is used for the declaration in
2383 * while (bool b = some_condition()) {
2387 * so we return the rvalue from the last seen declaration here.
2394 ast_parameter_declarator::hir(exec_list
*instructions
,
2395 struct _mesa_glsl_parse_state
*state
)
2398 const struct glsl_type
*type
;
2399 const char *name
= NULL
;
2400 YYLTYPE loc
= this->get_location();
2402 type
= this->type
->specifier
->glsl_type(& name
, state
);
2406 _mesa_glsl_error(& loc
, state
,
2407 "invalid type `%s' in declaration of `%s'",
2408 name
, this->identifier
);
2410 _mesa_glsl_error(& loc
, state
,
2411 "invalid type in declaration of `%s'",
2415 type
= glsl_type::error_type
;
2418 /* From page 62 (page 68 of the PDF) of the GLSL 1.50 spec:
2420 * "Functions that accept no input arguments need not use void in the
2421 * argument list because prototypes (or definitions) are required and
2422 * therefore there is no ambiguity when an empty argument list "( )" is
2423 * declared. The idiom "(void)" as a parameter list is provided for
2426 * Placing this check here prevents a void parameter being set up
2427 * for a function, which avoids tripping up checks for main taking
2428 * parameters and lookups of an unnamed symbol.
2430 if (type
->is_void()) {
2431 if (this->identifier
!= NULL
)
2432 _mesa_glsl_error(& loc
, state
,
2433 "named parameter cannot have type `void'");
2439 if (formal_parameter
&& (this->identifier
== NULL
)) {
2440 _mesa_glsl_error(& loc
, state
, "formal parameter lacks a name");
2444 /* This only handles "vec4 foo[..]". The earlier specifier->glsl_type(...)
2445 * call already handled the "vec4[..] foo" case.
2447 if (this->is_array
) {
2448 type
= process_array_type(&loc
, type
, this->array_size
, state
);
2451 if (type
->array_size() == 0) {
2452 _mesa_glsl_error(&loc
, state
, "arrays passed as parameters must have "
2453 "a declared size.");
2454 type
= glsl_type::error_type
;
2458 ir_variable
*var
= new(ctx
) ir_variable(type
, this->identifier
, ir_var_in
);
2460 /* Apply any specified qualifiers to the parameter declaration. Note that
2461 * for function parameters the default mode is 'in'.
2463 apply_type_qualifier_to_variable(& this->type
->qualifier
, var
, state
, & loc
);
2465 instructions
->push_tail(var
);
2467 /* Parameter declarations do not have r-values.
2474 ast_parameter_declarator::parameters_to_hir(exec_list
*ast_parameters
,
2476 exec_list
*ir_parameters
,
2477 _mesa_glsl_parse_state
*state
)
2479 ast_parameter_declarator
*void_param
= NULL
;
2482 foreach_list_typed (ast_parameter_declarator
, param
, link
, ast_parameters
) {
2483 param
->formal_parameter
= formal
;
2484 param
->hir(ir_parameters
, state
);
2492 if ((void_param
!= NULL
) && (count
> 1)) {
2493 YYLTYPE loc
= void_param
->get_location();
2495 _mesa_glsl_error(& loc
, state
,
2496 "`void' parameter must be only parameter");
2502 emit_function(_mesa_glsl_parse_state
*state
, exec_list
*instructions
,
2505 /* Emit the new function header */
2506 if (state
->current_function
== NULL
) {
2507 instructions
->push_tail(f
);
2509 /* IR invariants disallow function declarations or definitions nested
2510 * within other function definitions. Insert the new ir_function
2511 * block in the instruction sequence before the ir_function block
2512 * containing the current ir_function_signature.
2514 ir_function
*const curr
=
2515 const_cast<ir_function
*>(state
->current_function
->function());
2517 curr
->insert_before(f
);
2523 ast_function::hir(exec_list
*instructions
,
2524 struct _mesa_glsl_parse_state
*state
)
2527 ir_function
*f
= NULL
;
2528 ir_function_signature
*sig
= NULL
;
2529 exec_list hir_parameters
;
2531 const char *const name
= identifier
;
2533 /* From page 21 (page 27 of the PDF) of the GLSL 1.20 spec,
2535 * "Function declarations (prototypes) cannot occur inside of functions;
2536 * they must be at global scope, or for the built-in functions, outside
2537 * the global scope."
2539 * From page 27 (page 33 of the PDF) of the GLSL ES 1.00.16 spec,
2541 * "User defined functions may only be defined within the global scope."
2543 * Note that this language does not appear in GLSL 1.10.
2545 if ((state
->current_function
!= NULL
) && (state
->language_version
!= 110)) {
2546 YYLTYPE loc
= this->get_location();
2547 _mesa_glsl_error(&loc
, state
,
2548 "declaration of function `%s' not allowed within "
2549 "function body", name
);
2552 /* From page 15 (page 21 of the PDF) of the GLSL 1.10 spec,
2554 * "Identifiers starting with "gl_" are reserved for use by
2555 * OpenGL, and may not be declared in a shader as either a
2556 * variable or a function."
2558 if (strncmp(name
, "gl_", 3) == 0) {
2559 YYLTYPE loc
= this->get_location();
2560 _mesa_glsl_error(&loc
, state
,
2561 "identifier `%s' uses reserved `gl_' prefix", name
);
2564 /* Convert the list of function parameters to HIR now so that they can be
2565 * used below to compare this function's signature with previously seen
2566 * signatures for functions with the same name.
2568 ast_parameter_declarator::parameters_to_hir(& this->parameters
,
2570 & hir_parameters
, state
);
2572 const char *return_type_name
;
2573 const glsl_type
*return_type
=
2574 this->return_type
->specifier
->glsl_type(& return_type_name
, state
);
2577 YYLTYPE loc
= this->get_location();
2578 _mesa_glsl_error(&loc
, state
,
2579 "function `%s' has undeclared return type `%s'",
2580 name
, return_type_name
);
2581 return_type
= glsl_type::error_type
;
2584 /* From page 56 (page 62 of the PDF) of the GLSL 1.30 spec:
2585 * "No qualifier is allowed on the return type of a function."
2587 if (this->return_type
->has_qualifiers()) {
2588 YYLTYPE loc
= this->get_location();
2589 _mesa_glsl_error(& loc
, state
,
2590 "function `%s' return type has qualifiers", name
);
2593 /* Verify that this function's signature either doesn't match a previously
2594 * seen signature for a function with the same name, or, if a match is found,
2595 * that the previously seen signature does not have an associated definition.
2597 f
= state
->symbols
->get_function(name
);
2598 if (f
!= NULL
&& (state
->es_shader
|| f
->has_user_signature())) {
2599 sig
= f
->exact_matching_signature(&hir_parameters
);
2601 const char *badvar
= sig
->qualifiers_match(&hir_parameters
);
2602 if (badvar
!= NULL
) {
2603 YYLTYPE loc
= this->get_location();
2605 _mesa_glsl_error(&loc
, state
, "function `%s' parameter `%s' "
2606 "qualifiers don't match prototype", name
, badvar
);
2609 if (sig
->return_type
!= return_type
) {
2610 YYLTYPE loc
= this->get_location();
2612 _mesa_glsl_error(&loc
, state
, "function `%s' return type doesn't "
2613 "match prototype", name
);
2616 if (is_definition
&& sig
->is_defined
) {
2617 YYLTYPE loc
= this->get_location();
2619 _mesa_glsl_error(& loc
, state
, "function `%s' redefined", name
);
2623 f
= new(ctx
) ir_function(name
);
2624 if (!state
->symbols
->add_function(f
)) {
2625 /* This function name shadows a non-function use of the same name. */
2626 YYLTYPE loc
= this->get_location();
2628 _mesa_glsl_error(&loc
, state
, "function name `%s' conflicts with "
2629 "non-function", name
);
2633 emit_function(state
, instructions
, f
);
2636 /* Verify the return type of main() */
2637 if (strcmp(name
, "main") == 0) {
2638 if (! return_type
->is_void()) {
2639 YYLTYPE loc
= this->get_location();
2641 _mesa_glsl_error(& loc
, state
, "main() must return void");
2644 if (!hir_parameters
.is_empty()) {
2645 YYLTYPE loc
= this->get_location();
2647 _mesa_glsl_error(& loc
, state
, "main() must not take any parameters");
2651 /* Finish storing the information about this new function in its signature.
2654 sig
= new(ctx
) ir_function_signature(return_type
);
2655 f
->add_signature(sig
);
2658 sig
->replace_parameters(&hir_parameters
);
2661 /* Function declarations (prototypes) do not have r-values.
2668 ast_function_definition::hir(exec_list
*instructions
,
2669 struct _mesa_glsl_parse_state
*state
)
2671 prototype
->is_definition
= true;
2672 prototype
->hir(instructions
, state
);
2674 ir_function_signature
*signature
= prototype
->signature
;
2675 if (signature
== NULL
)
2678 assert(state
->current_function
== NULL
);
2679 state
->current_function
= signature
;
2680 state
->found_return
= false;
2682 /* Duplicate parameters declared in the prototype as concrete variables.
2683 * Add these to the symbol table.
2685 state
->symbols
->push_scope();
2686 foreach_iter(exec_list_iterator
, iter
, signature
->parameters
) {
2687 ir_variable
*const var
= ((ir_instruction
*) iter
.get())->as_variable();
2689 assert(var
!= NULL
);
2691 /* The only way a parameter would "exist" is if two parameters have
2694 if (state
->symbols
->name_declared_this_scope(var
->name
)) {
2695 YYLTYPE loc
= this->get_location();
2697 _mesa_glsl_error(& loc
, state
, "parameter `%s' redeclared", var
->name
);
2699 state
->symbols
->add_variable(var
);
2703 /* Convert the body of the function to HIR. */
2704 this->body
->hir(&signature
->body
, state
);
2705 signature
->is_defined
= true;
2707 state
->symbols
->pop_scope();
2709 assert(state
->current_function
== signature
);
2710 state
->current_function
= NULL
;
2712 if (!signature
->return_type
->is_void() && !state
->found_return
) {
2713 YYLTYPE loc
= this->get_location();
2714 _mesa_glsl_error(& loc
, state
, "function `%s' has non-void return type "
2715 "%s, but no return statement",
2716 signature
->function_name(),
2717 signature
->return_type
->name
);
2720 /* Function definitions do not have r-values.
2727 ast_jump_statement::hir(exec_list
*instructions
,
2728 struct _mesa_glsl_parse_state
*state
)
2735 assert(state
->current_function
);
2737 if (opt_return_value
) {
2738 if (state
->current_function
->return_type
->base_type
==
2740 YYLTYPE loc
= this->get_location();
2742 _mesa_glsl_error(& loc
, state
,
2743 "`return` with a value, in function `%s' "
2745 state
->current_function
->function_name());
2748 ir_rvalue
*const ret
= opt_return_value
->hir(instructions
, state
);
2749 assert(ret
!= NULL
);
2751 /* Implicit conversions are not allowed for return values. */
2752 if (state
->current_function
->return_type
!= ret
->type
) {
2753 YYLTYPE loc
= this->get_location();
2755 _mesa_glsl_error(& loc
, state
,
2756 "`return' with wrong type %s, in function `%s' "
2759 state
->current_function
->function_name(),
2760 state
->current_function
->return_type
->name
);
2763 inst
= new(ctx
) ir_return(ret
);
2765 if (state
->current_function
->return_type
->base_type
!=
2767 YYLTYPE loc
= this->get_location();
2769 _mesa_glsl_error(& loc
, state
,
2770 "`return' with no value, in function %s returning "
2772 state
->current_function
->function_name());
2774 inst
= new(ctx
) ir_return
;
2777 state
->found_return
= true;
2778 instructions
->push_tail(inst
);
2783 if (state
->target
!= fragment_shader
) {
2784 YYLTYPE loc
= this->get_location();
2786 _mesa_glsl_error(& loc
, state
,
2787 "`discard' may only appear in a fragment shader");
2789 instructions
->push_tail(new(ctx
) ir_discard
);
2794 /* FINISHME: Handle switch-statements. They cannot contain 'continue',
2795 * FINISHME: and they use a different IR instruction for 'break'.
2797 /* FINISHME: Correctly handle the nesting. If a switch-statement is
2798 * FINISHME: inside a loop, a 'continue' is valid and will bind to the
2801 if (state
->loop_or_switch_nesting
== NULL
) {
2802 YYLTYPE loc
= this->get_location();
2804 _mesa_glsl_error(& loc
, state
,
2805 "`%s' may only appear in a loop",
2806 (mode
== ast_break
) ? "break" : "continue");
2808 ir_loop
*const loop
= state
->loop_or_switch_nesting
->as_loop();
2810 /* Inline the for loop expression again, since we don't know
2811 * where near the end of the loop body the normal copy of it
2812 * is going to be placed.
2814 if (mode
== ast_continue
&&
2815 state
->loop_or_switch_nesting_ast
->rest_expression
) {
2816 state
->loop_or_switch_nesting_ast
->rest_expression
->hir(instructions
,
2821 ir_loop_jump
*const jump
=
2822 new(ctx
) ir_loop_jump((mode
== ast_break
)
2823 ? ir_loop_jump::jump_break
2824 : ir_loop_jump::jump_continue
);
2825 instructions
->push_tail(jump
);
2832 /* Jump instructions do not have r-values.
2839 ast_selection_statement::hir(exec_list
*instructions
,
2840 struct _mesa_glsl_parse_state
*state
)
2844 ir_rvalue
*const condition
= this->condition
->hir(instructions
, state
);
2846 /* From page 66 (page 72 of the PDF) of the GLSL 1.50 spec:
2848 * "Any expression whose type evaluates to a Boolean can be used as the
2849 * conditional expression bool-expression. Vector types are not accepted
2850 * as the expression to if."
2852 * The checks are separated so that higher quality diagnostics can be
2853 * generated for cases where both rules are violated.
2855 if (!condition
->type
->is_boolean() || !condition
->type
->is_scalar()) {
2856 YYLTYPE loc
= this->condition
->get_location();
2858 _mesa_glsl_error(& loc
, state
, "if-statement condition must be scalar "
2862 ir_if
*const stmt
= new(ctx
) ir_if(condition
);
2864 if (then_statement
!= NULL
) {
2865 state
->symbols
->push_scope();
2866 then_statement
->hir(& stmt
->then_instructions
, state
);
2867 state
->symbols
->pop_scope();
2870 if (else_statement
!= NULL
) {
2871 state
->symbols
->push_scope();
2872 else_statement
->hir(& stmt
->else_instructions
, state
);
2873 state
->symbols
->pop_scope();
2876 instructions
->push_tail(stmt
);
2878 /* if-statements do not have r-values.
2885 ast_iteration_statement::condition_to_hir(ir_loop
*stmt
,
2886 struct _mesa_glsl_parse_state
*state
)
2890 if (condition
!= NULL
) {
2891 ir_rvalue
*const cond
=
2892 condition
->hir(& stmt
->body_instructions
, state
);
2895 || !cond
->type
->is_boolean() || !cond
->type
->is_scalar()) {
2896 YYLTYPE loc
= condition
->get_location();
2898 _mesa_glsl_error(& loc
, state
,
2899 "loop condition must be scalar boolean");
2901 /* As the first code in the loop body, generate a block that looks
2902 * like 'if (!condition) break;' as the loop termination condition.
2904 ir_rvalue
*const not_cond
=
2905 new(ctx
) ir_expression(ir_unop_logic_not
, glsl_type::bool_type
, cond
,
2908 ir_if
*const if_stmt
= new(ctx
) ir_if(not_cond
);
2910 ir_jump
*const break_stmt
=
2911 new(ctx
) ir_loop_jump(ir_loop_jump::jump_break
);
2913 if_stmt
->then_instructions
.push_tail(break_stmt
);
2914 stmt
->body_instructions
.push_tail(if_stmt
);
2921 ast_iteration_statement::hir(exec_list
*instructions
,
2922 struct _mesa_glsl_parse_state
*state
)
2926 /* For-loops and while-loops start a new scope, but do-while loops do not.
2928 if (mode
!= ast_do_while
)
2929 state
->symbols
->push_scope();
2931 if (init_statement
!= NULL
)
2932 init_statement
->hir(instructions
, state
);
2934 ir_loop
*const stmt
= new(ctx
) ir_loop();
2935 instructions
->push_tail(stmt
);
2937 /* Track the current loop and / or switch-statement nesting.
2939 ir_instruction
*const nesting
= state
->loop_or_switch_nesting
;
2940 ast_iteration_statement
*nesting_ast
= state
->loop_or_switch_nesting_ast
;
2942 state
->loop_or_switch_nesting
= stmt
;
2943 state
->loop_or_switch_nesting_ast
= this;
2945 if (mode
!= ast_do_while
)
2946 condition_to_hir(stmt
, state
);
2949 body
->hir(& stmt
->body_instructions
, state
);
2951 if (rest_expression
!= NULL
)
2952 rest_expression
->hir(& stmt
->body_instructions
, state
);
2954 if (mode
== ast_do_while
)
2955 condition_to_hir(stmt
, state
);
2957 if (mode
!= ast_do_while
)
2958 state
->symbols
->pop_scope();
2960 /* Restore previous nesting before returning.
2962 state
->loop_or_switch_nesting
= nesting
;
2963 state
->loop_or_switch_nesting_ast
= nesting_ast
;
2965 /* Loops do not have r-values.
2972 ast_type_specifier::hir(exec_list
*instructions
,
2973 struct _mesa_glsl_parse_state
*state
)
2975 if (this->structure
!= NULL
)
2976 return this->structure
->hir(instructions
, state
);
2983 ast_struct_specifier::hir(exec_list
*instructions
,
2984 struct _mesa_glsl_parse_state
*state
)
2986 unsigned decl_count
= 0;
2988 /* Make an initial pass over the list of structure fields to determine how
2989 * many there are. Each element in this list is an ast_declarator_list.
2990 * This means that we actually need to count the number of elements in the
2991 * 'declarations' list in each of the elements.
2993 foreach_list_typed (ast_declarator_list
, decl_list
, link
,
2994 &this->declarations
) {
2995 foreach_list_const (decl_ptr
, & decl_list
->declarations
) {
3000 /* Allocate storage for the structure fields and process the field
3001 * declarations. As the declarations are processed, try to also convert
3002 * the types to HIR. This ensures that structure definitions embedded in
3003 * other structure definitions are processed.
3005 glsl_struct_field
*const fields
= talloc_array(state
, glsl_struct_field
,
3009 foreach_list_typed (ast_declarator_list
, decl_list
, link
,
3010 &this->declarations
) {
3011 const char *type_name
;
3013 decl_list
->type
->specifier
->hir(instructions
, state
);
3015 /* Section 10.9 of the GLSL ES 1.00 specification states that
3016 * embedded structure definitions have been removed from the language.
3018 if (state
->es_shader
&& decl_list
->type
->specifier
->structure
!= NULL
) {
3019 YYLTYPE loc
= this->get_location();
3020 _mesa_glsl_error(&loc
, state
, "Embedded structure definitions are "
3021 "not allowed in GLSL ES 1.00.");
3024 const glsl_type
*decl_type
=
3025 decl_list
->type
->specifier
->glsl_type(& type_name
, state
);
3027 foreach_list_typed (ast_declaration
, decl
, link
,
3028 &decl_list
->declarations
) {
3029 const struct glsl_type
*field_type
= decl_type
;
3030 if (decl
->is_array
) {
3031 YYLTYPE loc
= decl
->get_location();
3032 field_type
= process_array_type(&loc
, decl_type
, decl
->array_size
,
3035 fields
[i
].type
= (field_type
!= NULL
)
3036 ? field_type
: glsl_type::error_type
;
3037 fields
[i
].name
= decl
->identifier
;
3042 assert(i
== decl_count
);
3044 const glsl_type
*t
=
3045 glsl_type::get_record_instance(fields
, decl_count
, this->name
);
3047 YYLTYPE loc
= this->get_location();
3048 if (!state
->symbols
->add_type(name
, t
)) {
3049 _mesa_glsl_error(& loc
, state
, "struct `%s' previously defined", name
);
3052 const glsl_type
**s
= (const glsl_type
**)
3053 realloc(state
->user_structures
,
3054 sizeof(state
->user_structures
[0]) *
3055 (state
->num_user_structures
+ 1));
3057 s
[state
->num_user_structures
] = t
;
3058 state
->user_structures
= s
;
3059 state
->num_user_structures
++;
3063 /* Structure type definitions do not have r-values.