3 * Copyright © 2010 Intel Corporation
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:
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
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.
37 #include "ir_visitor.h"
38 #include "ir_hierarchical_visitor.h"
41 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
50 ir_type_dereference_array
,
51 ir_type_dereference_record
,
52 ir_type_dereference_variable
,
56 ir_type_function_signature
,
63 ir_type_max
, /**< maximum ir_type enum number, for validation */
67 * Base class of all IR instructions
69 class ir_instruction
: public exec_node
{
71 enum ir_node_type ir_type
;
72 const struct glsl_type
*type
;
74 /** ir_print_visitor helper for debugging. */
75 void print(void) const;
77 virtual void accept(ir_visitor
*) = 0;
78 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*) = 0;
79 virtual ir_instruction
*clone(void *mem_ctx
,
80 struct hash_table
*ht
) const = 0;
83 * \name IR instruction downcast functions
85 * These functions either cast the object to a derived class or return
86 * \c NULL if the object's type does not match the specified derived class.
87 * Additional downcast functions will be added as needed.
90 virtual class ir_variable
* as_variable() { return NULL
; }
91 virtual class ir_function
* as_function() { return NULL
; }
92 virtual class ir_dereference
* as_dereference() { return NULL
; }
93 virtual class ir_dereference_array
* as_dereference_array() { return NULL
; }
94 virtual class ir_dereference_variable
*as_dereference_variable() { return NULL
; }
95 virtual class ir_expression
* as_expression() { return NULL
; }
96 virtual class ir_rvalue
* as_rvalue() { return NULL
; }
97 virtual class ir_loop
* as_loop() { return NULL
; }
98 virtual class ir_assignment
* as_assignment() { return NULL
; }
99 virtual class ir_call
* as_call() { return NULL
; }
100 virtual class ir_return
* as_return() { return NULL
; }
101 virtual class ir_if
* as_if() { return NULL
; }
102 virtual class ir_swizzle
* as_swizzle() { return NULL
; }
103 virtual class ir_constant
* as_constant() { return NULL
; }
109 ir_type
= ir_type_unset
;
115 class ir_rvalue
: public ir_instruction
{
117 virtual ir_rvalue
*clone(void *mem_ctx
, struct hash_table
*) const = 0;
119 virtual ir_constant
*constant_expression_value() = 0;
121 virtual ir_rvalue
* as_rvalue()
126 virtual bool is_lvalue()
132 * Get the variable that is ultimately referenced by an r-value
134 virtual ir_variable
*variable_referenced()
141 * If an r-value is a reference to a whole variable, get that variable
144 * Pointer to a variable that is completely dereferenced by the r-value. If
145 * the r-value is not a dereference or the dereference does not access the
146 * entire variable (i.e., it's just one array element, struct field), \c NULL
149 virtual ir_variable
*whole_variable_referenced()
159 enum ir_variable_mode
{
165 ir_var_temporary
/**< Temporary variable generated during compilation. */
168 enum ir_variable_interpolation
{
175 class ir_variable
: public ir_instruction
{
177 ir_variable(const struct glsl_type
*, const char *, ir_variable_mode
);
179 virtual ir_variable
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
181 virtual ir_variable
*as_variable()
186 virtual void accept(ir_visitor
*v
)
191 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
195 * Get the string value for the interpolation qualifier
198 * If none of \c shader_in or \c shader_out is set, an empty string will
199 * be returned. Otherwise the string that would be used in a shader to
200 * specify \c mode will be returned.
202 const char *interpolation_string() const;
205 * Calculate the number of slots required to hold this variable
207 * This is used to determine how many uniform or varying locations a variable
208 * occupies. The count is in units of floating point components.
210 unsigned component_slots() const;
215 * Highest element accessed with a constant expression array index
217 * Not used for non-array variables.
219 unsigned max_array_access
;
221 unsigned read_only
:1;
223 unsigned invariant
:1;
224 /** If the variable is initialized outside of the scope of the shader */
225 unsigned shader_in
:1;
227 * If the variable value is later used outside of the scope of the shader.
229 unsigned shader_out
:1;
232 unsigned interpolation
:2;
235 * Flag that the whole array is assignable
237 * In GLSL 1.20 and later whole arrays are assignable (and comparable for
238 * equality). This flag enables this behavior.
240 unsigned array_lvalue
:1;
242 /* ARB_fragment_coord_conventions */
243 unsigned origin_upper_left
:1;
244 unsigned pixel_center_integer
:1;
247 * Storage location of the base of this variable
249 * The precise meaning of this field depends on the nature of the variable.
251 * - Vertex shader input: one of the values from \c gl_vert_attrib.
252 * - Vertex shader output: one of the values from \c gl_vert_result.
253 * - Fragment shader input: one of the values from \c gl_frag_attrib.
254 * - Fragment shader output: one of the values from \c gl_frag_result.
255 * - Uniforms: Per-stage uniform slot number.
256 * - Other: This field is not currently used.
258 * If the variable is a uniform, shader input, or shader output, and the
259 * slot has not been assigned, the value will be -1.
264 * Emit a warning if this variable is accessed.
266 const char *warn_extension
;
269 * Value assigned in the initializer of a variable declared "const"
271 ir_constant
*constant_value
;
277 * The representation of a function instance; may be the full definition or
278 * simply a prototype.
280 class ir_function_signature
: public ir_instruction
{
281 /* An ir_function_signature will be part of the list of signatures in
285 ir_function_signature(const glsl_type
*return_type
);
287 virtual ir_function_signature
*clone(void *mem_ctx
,
288 struct hash_table
*ht
) const;
290 virtual void accept(ir_visitor
*v
)
295 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
298 * Get the name of the function for which this is a signature
300 const char *function_name() const;
303 * Get a handle to the function for which this is a signature
305 * There is no setter function, this function returns a \c const pointer,
306 * and \c ir_function_signature::_function is private for a reason. The
307 * only way to make a connection between a function and function signature
308 * is via \c ir_function::add_signature. This helps ensure that certain
309 * invariants (i.e., a function signature is in the list of signatures for
310 * its \c _function) are met.
312 * \sa ir_function::add_signature
314 inline const class ir_function
*function() const
316 return this->_function
;
320 * Check whether the qualifiers match between this signature's parameters
321 * and the supplied parameter list. If not, returns the name of the first
322 * parameter with mismatched qualifiers (for use in error messages).
324 const char *qualifiers_match(exec_list
*params
);
327 * Replace the current parameter list with the given one. This is useful
328 * if the current information came from a prototype, and either has invalid
329 * or missing parameter names.
331 void replace_parameters(exec_list
*new_params
);
334 * Function return type.
336 * \note This discards the optional precision qualifier.
338 const struct glsl_type
*return_type
;
341 * List of ir_variable of function parameters.
343 * This represents the storage. The paramaters passed in a particular
344 * call will be in ir_call::actual_paramaters.
346 struct exec_list parameters
;
348 /** Whether or not this function has a body (which may be empty). */
349 unsigned is_defined
:1;
351 /** Whether or not this function signature is a built-in. */
352 unsigned is_built_in
:1;
354 /** Body of instructions in the function. */
355 struct exec_list body
;
358 /** Function of which this signature is one overload. */
359 class ir_function
*_function
;
361 friend class ir_function
;
366 * Header for tracking multiple overloaded functions with the same name.
367 * Contains a list of ir_function_signatures representing each of the
370 class ir_function
: public ir_instruction
{
372 ir_function(const char *name
);
374 virtual ir_function
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
376 virtual ir_function
*as_function()
381 virtual void accept(ir_visitor
*v
)
386 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
388 void add_signature(ir_function_signature
*sig
)
390 sig
->_function
= this;
391 this->signatures
.push_tail(sig
);
395 * Get an iterator for the set of function signatures
397 exec_list_iterator
iterator()
399 return signatures
.iterator();
403 * Find a signature that matches a set of actual parameters, taking implicit
404 * conversions into account.
406 ir_function_signature
*matching_signature(const exec_list
*actual_param
);
409 * Find a signature that exactly matches a set of actual parameters without
410 * any implicit type conversions.
412 ir_function_signature
*exact_matching_signature(const exec_list
*actual_ps
);
415 * Name of the function.
421 * List of ir_function_signature for each overloaded function with this name.
423 struct exec_list signatures
;
426 inline const char *ir_function_signature::function_name() const
428 return this->_function
->name
;
434 * IR instruction representing high-level if-statements
436 class ir_if
: public ir_instruction
{
438 ir_if(ir_rvalue
*condition
)
439 : condition(condition
)
441 ir_type
= ir_type_if
;
444 virtual ir_if
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
446 virtual ir_if
*as_if()
451 virtual void accept(ir_visitor
*v
)
456 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
458 ir_rvalue
*condition
;
459 /** List of ir_instruction for the body of the then branch */
460 exec_list then_instructions
;
461 /** List of ir_instruction for the body of the else branch */
462 exec_list else_instructions
;
467 * IR instruction representing a high-level loop structure.
469 class ir_loop
: public ir_instruction
{
471 ir_loop() : from(NULL
), to(NULL
), increment(NULL
), counter(NULL
)
473 ir_type
= ir_type_loop
;
476 virtual ir_loop
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
478 virtual void accept(ir_visitor
*v
)
483 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
485 virtual ir_loop
*as_loop()
491 * Get an iterator for the instructions of the loop body
493 exec_list_iterator
iterator()
495 return body_instructions
.iterator();
498 /** List of ir_instruction that make up the body of the loop. */
499 exec_list body_instructions
;
502 * \name Loop counter and controls
507 ir_rvalue
*increment
;
508 ir_variable
*counter
;
513 class ir_assignment
: public ir_instruction
{
515 ir_assignment(ir_rvalue
*lhs
, ir_rvalue
*rhs
, ir_rvalue
*condition
);
518 * Construct an assignment with an explicit write mask
521 * Since a write mask is supplied, the LHS must already be a bare
522 * \c ir_dereference. The cannot be any swizzles in the LHS.
524 ir_assignment(ir_dereference
*lhs
, ir_rvalue
*rhs
, ir_rvalue
*condition
,
525 unsigned write_mask
);
527 virtual ir_assignment
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
529 virtual ir_constant
*constant_expression_value();
531 virtual void accept(ir_visitor
*v
)
536 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
538 virtual ir_assignment
* as_assignment()
544 * Get a whole variable written by an assignment
546 * If the LHS of the assignment writes a whole variable, the variable is
547 * returned. Otherwise \c NULL is returned. Examples of whole-variable
550 * - Assigning to a scalar
551 * - Assigning to all components of a vector
552 * - Whole array (or matrix) assignment
553 * - Whole structure assignment
555 ir_variable
*whole_variable_written();
558 * Set the LHS of an assignment
560 void set_lhs(ir_rvalue
*lhs
);
563 * Left-hand side of the assignment.
565 * This should be treated as read only. If you need to set the LHS of an
566 * assignment, use \c ir_assignment::set_lhs.
571 * Value being assigned
576 * Optional condition for the assignment.
578 ir_rvalue
*condition
;
582 * Component mask written
584 * For non-vector types in the LHS, this field will be zero. For vector
585 * types, a bit will be set for each component that is written. Note that
586 * for \c vec2 and \c vec3 types only the lower bits will ever be set.
588 unsigned write_mask
:4;
591 /* Update ir_expression::num_operands() and operator_strs when
592 * updating this list.
594 enum ir_expression_operation
{
607 ir_unop_f2i
, /**< Float-to-integer conversion. */
608 ir_unop_i2f
, /**< Integer-to-float conversion. */
609 ir_unop_f2b
, /**< Float-to-boolean conversion */
610 ir_unop_b2f
, /**< Boolean-to-float conversion */
611 ir_unop_i2b
, /**< int-to-boolean conversion */
612 ir_unop_b2i
, /**< Boolean-to-int conversion */
613 ir_unop_u2f
, /**< Unsigned-to-float conversion. */
616 * \name Unary floating-point rounding operations.
626 * \name Trigonometric operations.
634 * \name Partial derivatives.
647 * Takes one of two combinations of arguments:
652 * Does not take integer types.
657 * \name Binary comparison operators
665 * Returns single boolean for whether all components of operands[0]
666 * equal the components of operands[1].
670 * Returns single boolean for whether any component of operands[0]
671 * is not equal to the corresponding component of operands[1].
677 * \name Bit-wise binary operations.
699 class ir_expression
: public ir_rvalue
{
701 ir_expression(int op
, const struct glsl_type
*type
,
702 ir_rvalue
*, ir_rvalue
*);
704 virtual ir_expression
*as_expression()
709 virtual ir_expression
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
711 virtual ir_constant
*constant_expression_value();
713 static unsigned int get_num_operands(ir_expression_operation
);
714 unsigned int get_num_operands() const
716 return get_num_operands(operation
);
720 * Return a string representing this expression's operator.
722 const char *operator_string();
725 * Do a reverse-lookup to translate the given string into an operator.
727 static ir_expression_operation
get_operator(const char *);
729 virtual void accept(ir_visitor
*v
)
734 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
736 ir_expression_operation operation
;
737 ir_rvalue
*operands
[2];
742 * IR instruction representing a function call
744 class ir_call
: public ir_rvalue
{
746 ir_call(ir_function_signature
*callee
, exec_list
*actual_parameters
)
749 ir_type
= ir_type_call
;
750 assert(callee
->return_type
!= NULL
);
751 type
= callee
->return_type
;
752 actual_parameters
->move_nodes_to(& this->actual_parameters
);
755 virtual ir_call
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
757 virtual ir_constant
*constant_expression_value();
759 virtual ir_call
*as_call()
764 virtual void accept(ir_visitor
*v
)
769 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
772 * Get a generic ir_call object when an error occurs
774 * Any allocation will be performed with 'ctx' as talloc owner.
776 static ir_call
*get_error_instruction(void *ctx
);
779 * Get an iterator for the set of acutal parameters
781 exec_list_iterator
iterator()
783 return actual_parameters
.iterator();
787 * Get the name of the function being called.
789 const char *callee_name() const
791 return callee
->function_name();
794 ir_function_signature
*get_callee()
800 * Set the function call target
802 void set_callee(ir_function_signature
*sig
);
805 * Generates an inline version of the function before @ir,
806 * returning the return value of the function.
808 ir_rvalue
*generate_inline(ir_instruction
*ir
);
810 /* List of ir_rvalue of paramaters passed in this call. */
811 exec_list actual_parameters
;
817 this->ir_type
= ir_type_call
;
820 ir_function_signature
*callee
;
825 * \name Jump-like IR instructions.
827 * These include \c break, \c continue, \c return, and \c discard.
830 class ir_jump
: public ir_instruction
{
834 ir_type
= ir_type_unset
;
838 class ir_return
: public ir_jump
{
843 this->ir_type
= ir_type_return
;
846 ir_return(ir_rvalue
*value
)
849 this->ir_type
= ir_type_return
;
852 virtual ir_return
*clone(void *mem_ctx
, struct hash_table
*) const;
854 virtual ir_return
*as_return()
859 ir_rvalue
*get_value() const
864 virtual void accept(ir_visitor
*v
)
869 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
876 * Jump instructions used inside loops
878 * These include \c break and \c continue. The \c break within a loop is
879 * different from the \c break within a switch-statement.
883 class ir_loop_jump
: public ir_jump
{
890 ir_loop_jump(jump_mode mode
)
892 this->ir_type
= ir_type_loop_jump
;
897 virtual ir_loop_jump
*clone(void *mem_ctx
, struct hash_table
*) const;
899 virtual void accept(ir_visitor
*v
)
904 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
906 bool is_break() const
908 return mode
== jump_break
;
911 bool is_continue() const
913 return mode
== jump_continue
;
916 /** Mode selector for the jump instruction. */
919 /** Loop containing this break instruction. */
924 * IR instruction representing discard statements.
926 class ir_discard
: public ir_jump
{
930 this->ir_type
= ir_type_discard
;
931 this->condition
= NULL
;
934 ir_discard(ir_rvalue
*cond
)
936 this->ir_type
= ir_type_discard
;
937 this->condition
= cond
;
940 virtual ir_discard
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
942 virtual void accept(ir_visitor
*v
)
947 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
949 ir_rvalue
*condition
;
955 * Texture sampling opcodes used in ir_texture
957 enum ir_texture_opcode
{
958 ir_tex
, /* Regular texture look-up */
959 ir_txb
, /* Texture look-up with LOD bias */
960 ir_txl
, /* Texture look-up with explicit LOD */
961 ir_txd
, /* Texture look-up with partial derivatvies */
962 ir_txf
/* Texel fetch with explicit LOD */
967 * IR instruction to sample a texture
969 * The specific form of the IR instruction depends on the \c mode value
970 * selected from \c ir_texture_opcodes. In the printed IR, these will
974 * | Projection divisor
975 * | | Shadow comparitor
978 * (tex (sampler) (coordinate) (0 0 0) (1) ( ))
979 * (txb (sampler) (coordinate) (0 0 0) (1) ( ) (bias))
980 * (txl (sampler) (coordinate) (0 0 0) (1) ( ) (lod))
981 * (txd (sampler) (coordinate) (0 0 0) (1) ( ) (dPdx dPdy))
982 * (txf (sampler) (coordinate) (0 0 0) (lod))
984 class ir_texture
: public ir_rvalue
{
986 ir_texture(enum ir_texture_opcode op
)
987 : op(op
), projector(NULL
), shadow_comparitor(NULL
)
989 this->ir_type
= ir_type_texture
;
992 virtual ir_texture
*clone(void *mem_ctx
, struct hash_table
*) const;
994 virtual ir_constant
*constant_expression_value();
996 virtual void accept(ir_visitor
*v
)
1001 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1004 * Return a string representing the ir_texture_opcode.
1006 const char *opcode_string();
1008 /** Set the sampler and infer the type. */
1009 void set_sampler(ir_dereference
*sampler
);
1012 * Do a reverse-lookup to translate a string into an ir_texture_opcode.
1014 static ir_texture_opcode
get_opcode(const char *);
1016 enum ir_texture_opcode op
;
1018 /** Sampler to use for the texture access. */
1019 ir_dereference
*sampler
;
1021 /** Texture coordinate to sample */
1022 ir_rvalue
*coordinate
;
1025 * Value used for projective divide.
1027 * If there is no projective divide (the common case), this will be
1028 * \c NULL. Optimization passes should check for this to point to a constant
1029 * of 1.0 and replace that with \c NULL.
1031 ir_rvalue
*projector
;
1034 * Coordinate used for comparison on shadow look-ups.
1036 * If there is no shadow comparison, this will be \c NULL. For the
1037 * \c ir_txf opcode, this *must* be \c NULL.
1039 ir_rvalue
*shadow_comparitor
;
1041 /** Explicit texel offsets. */
1042 signed char offsets
[3];
1045 ir_rvalue
*lod
; /**< Floating point LOD */
1046 ir_rvalue
*bias
; /**< Floating point LOD bias */
1048 ir_rvalue
*dPdx
; /**< Partial derivative of coordinate wrt X */
1049 ir_rvalue
*dPdy
; /**< Partial derivative of coordinate wrt Y */
1055 struct ir_swizzle_mask
{
1062 * Number of components in the swizzle.
1064 unsigned num_components
:3;
1067 * Does the swizzle contain duplicate components?
1069 * L-value swizzles cannot contain duplicate components.
1071 unsigned has_duplicates
:1;
1075 class ir_swizzle
: public ir_rvalue
{
1077 ir_swizzle(ir_rvalue
*, unsigned x
, unsigned y
, unsigned z
, unsigned w
,
1080 ir_swizzle(ir_rvalue
*val
, const unsigned *components
, unsigned count
);
1082 ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
);
1084 virtual ir_swizzle
*clone(void *mem_ctx
, struct hash_table
*) const;
1086 virtual ir_constant
*constant_expression_value();
1088 virtual ir_swizzle
*as_swizzle()
1094 * Construct an ir_swizzle from the textual representation. Can fail.
1096 static ir_swizzle
*create(ir_rvalue
*, const char *, unsigned vector_length
);
1098 virtual void accept(ir_visitor
*v
)
1103 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1107 return val
->is_lvalue() && !mask
.has_duplicates
;
1111 * Get the variable that is ultimately referenced by an r-value
1113 virtual ir_variable
*variable_referenced();
1116 ir_swizzle_mask mask
;
1120 * Initialize the mask component of a swizzle
1122 * This is used by the \c ir_swizzle constructors.
1124 void init_mask(const unsigned *components
, unsigned count
);
1128 class ir_dereference
: public ir_rvalue
{
1130 virtual ir_dereference
*clone(void *mem_ctx
, struct hash_table
*) const = 0;
1132 virtual ir_dereference
*as_dereference()
1140 * Get the variable that is ultimately referenced by an r-value
1142 virtual ir_variable
*variable_referenced() = 0;
1146 class ir_dereference_variable
: public ir_dereference
{
1148 ir_dereference_variable(ir_variable
*var
);
1150 virtual ir_dereference_variable
*clone(void *mem_ctx
,
1151 struct hash_table
*) const;
1153 virtual ir_constant
*constant_expression_value();
1155 virtual ir_dereference_variable
*as_dereference_variable()
1161 * Get the variable that is ultimately referenced by an r-value
1163 virtual ir_variable
*variable_referenced()
1168 virtual ir_variable
*whole_variable_referenced()
1170 /* ir_dereference_variable objects always dereference the entire
1171 * variable. However, if this dereference is dereferenced by anything
1172 * else, the complete deferefernce chain is not a whole-variable
1173 * dereference. This method should only be called on the top most
1174 * ir_rvalue in a dereference chain.
1179 virtual void accept(ir_visitor
*v
)
1184 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1187 * Object being dereferenced.
1193 class ir_dereference_array
: public ir_dereference
{
1195 ir_dereference_array(ir_rvalue
*value
, ir_rvalue
*array_index
);
1197 ir_dereference_array(ir_variable
*var
, ir_rvalue
*array_index
);
1199 virtual ir_dereference_array
*clone(void *mem_ctx
,
1200 struct hash_table
*) const;
1202 virtual ir_constant
*constant_expression_value();
1204 virtual ir_dereference_array
*as_dereference_array()
1210 * Get the variable that is ultimately referenced by an r-value
1212 virtual ir_variable
*variable_referenced()
1214 return this->array
->variable_referenced();
1217 virtual void accept(ir_visitor
*v
)
1222 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1225 ir_rvalue
*array_index
;
1228 void set_array(ir_rvalue
*value
);
1232 class ir_dereference_record
: public ir_dereference
{
1234 ir_dereference_record(ir_rvalue
*value
, const char *field
);
1236 ir_dereference_record(ir_variable
*var
, const char *field
);
1238 virtual ir_dereference_record
*clone(void *mem_ctx
,
1239 struct hash_table
*) const;
1241 virtual ir_constant
*constant_expression_value();
1244 * Get the variable that is ultimately referenced by an r-value
1246 virtual ir_variable
*variable_referenced()
1248 return this->record
->variable_referenced();
1251 virtual void accept(ir_visitor
*v
)
1256 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1264 * Data stored in an ir_constant
1266 union ir_constant_data
{
1274 class ir_constant
: public ir_rvalue
{
1276 ir_constant(const struct glsl_type
*type
, const ir_constant_data
*data
);
1277 ir_constant(bool b
);
1278 ir_constant(unsigned int u
);
1280 ir_constant(float f
);
1283 * Construct an ir_constant from a list of ir_constant values
1285 ir_constant(const struct glsl_type
*type
, exec_list
*values
);
1288 * Construct an ir_constant from a scalar component of another ir_constant
1290 * The new \c ir_constant inherits the type of the component from the
1294 * In the case of a matrix constant, the new constant is a scalar, \b not
1297 ir_constant(const ir_constant
*c
, unsigned i
);
1300 * Return a new ir_constant of the specified type containing all zeros.
1302 static ir_constant
*zero(void *mem_ctx
, const glsl_type
*type
);
1304 virtual ir_constant
*clone(void *mem_ctx
, struct hash_table
*) const;
1306 virtual ir_constant
*constant_expression_value();
1308 virtual ir_constant
*as_constant()
1313 virtual void accept(ir_visitor
*v
)
1318 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1321 * Get a particular component of a constant as a specific type
1323 * This is useful, for example, to get a value from an integer constant
1324 * as a float or bool. This appears frequently when constructors are
1325 * called with all constant parameters.
1328 bool get_bool_component(unsigned i
) const;
1329 float get_float_component(unsigned i
) const;
1330 int get_int_component(unsigned i
) const;
1331 unsigned get_uint_component(unsigned i
) const;
1334 ir_constant
*get_array_element(unsigned i
) const;
1336 ir_constant
*get_record_field(const char *name
);
1339 * Determine whether a constant has the same value as another constant
1341 bool has_value(const ir_constant
*) const;
1344 * Value of the constant.
1346 * The field used to back the values supplied by the constant is determined
1347 * by the type associated with the \c ir_instruction. Constants may be
1348 * scalars, vectors, or matrices.
1350 union ir_constant_data value
;
1352 /* Array elements */
1353 ir_constant
**array_elements
;
1355 /* Structure fields */
1356 exec_list components
;
1360 * Parameterless constructor only used by the clone method
1366 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
);
1368 void validate_ir_tree(exec_list
*instructions
);
1371 * Make a clone of each IR instruction in a list
1373 * \param in List of IR instructions that are to be cloned
1374 * \param out List to hold the cloned instructions
1377 clone_ir_list(void *mem_ctx
, exec_list
*out
, const exec_list
*in
);
1380 _mesa_glsl_initialize_variables(exec_list
*instructions
,
1381 struct _mesa_glsl_parse_state
*state
);
1384 _mesa_glsl_initialize_functions(exec_list
*instructions
,
1385 struct _mesa_glsl_parse_state
*state
);
1388 _mesa_glsl_release_functions(void);
1391 reparent_ir(exec_list
*list
, void *mem_ctx
);
1393 class glsl_symbol_table
;
1396 import_prototypes(const exec_list
*source
, exec_list
*dest
,
1397 class glsl_symbol_table
*symbols
, void *mem_ctx
);