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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
197 * \return The string that would be used in a shader to specify \c
198 * mode will be returned.
200 * This function should only be used on a shader input or output variable.
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;
226 unsigned interpolation
:2;
229 * Flag that the whole array is assignable
231 * In GLSL 1.20 and later whole arrays are assignable (and comparable for
232 * equality). This flag enables this behavior.
234 unsigned array_lvalue
:1;
236 /* ARB_fragment_coord_conventions */
237 unsigned origin_upper_left
:1;
238 unsigned pixel_center_integer
:1;
241 * Storage location of the base of this variable
243 * The precise meaning of this field depends on the nature of the variable.
245 * - Vertex shader input: one of the values from \c gl_vert_attrib.
246 * - Vertex shader output: one of the values from \c gl_vert_result.
247 * - Fragment shader input: one of the values from \c gl_frag_attrib.
248 * - Fragment shader output: one of the values from \c gl_frag_result.
249 * - Uniforms: Per-stage uniform slot number.
250 * - Other: This field is not currently used.
252 * If the variable is a uniform, shader input, or shader output, and the
253 * slot has not been assigned, the value will be -1.
258 * Emit a warning if this variable is accessed.
260 const char *warn_extension
;
263 * Value assigned in the initializer of a variable declared "const"
265 ir_constant
*constant_value
;
271 * The representation of a function instance; may be the full definition or
272 * simply a prototype.
274 class ir_function_signature
: public ir_instruction
{
275 /* An ir_function_signature will be part of the list of signatures in
279 ir_function_signature(const glsl_type
*return_type
);
281 virtual ir_function_signature
*clone(void *mem_ctx
,
282 struct hash_table
*ht
) const;
284 virtual void accept(ir_visitor
*v
)
289 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
292 * Get the name of the function for which this is a signature
294 const char *function_name() const;
297 * Get a handle to the function for which this is a signature
299 * There is no setter function, this function returns a \c const pointer,
300 * and \c ir_function_signature::_function is private for a reason. The
301 * only way to make a connection between a function and function signature
302 * is via \c ir_function::add_signature. This helps ensure that certain
303 * invariants (i.e., a function signature is in the list of signatures for
304 * its \c _function) are met.
306 * \sa ir_function::add_signature
308 inline const class ir_function
*function() const
310 return this->_function
;
314 * Check whether the qualifiers match between this signature's parameters
315 * and the supplied parameter list. If not, returns the name of the first
316 * parameter with mismatched qualifiers (for use in error messages).
318 const char *qualifiers_match(exec_list
*params
);
321 * Replace the current parameter list with the given one. This is useful
322 * if the current information came from a prototype, and either has invalid
323 * or missing parameter names.
325 void replace_parameters(exec_list
*new_params
);
328 * Function return type.
330 * \note This discards the optional precision qualifier.
332 const struct glsl_type
*return_type
;
335 * List of ir_variable of function parameters.
337 * This represents the storage. The paramaters passed in a particular
338 * call will be in ir_call::actual_paramaters.
340 struct exec_list parameters
;
342 /** Whether or not this function has a body (which may be empty). */
343 unsigned is_defined
:1;
345 /** Whether or not this function signature is a built-in. */
346 unsigned is_builtin
:1;
348 /** Body of instructions in the function. */
349 struct exec_list body
;
352 /** Function of which this signature is one overload. */
353 class ir_function
*_function
;
355 friend class ir_function
;
360 * Header for tracking multiple overloaded functions with the same name.
361 * Contains a list of ir_function_signatures representing each of the
364 class ir_function
: public ir_instruction
{
366 ir_function(const char *name
);
368 virtual ir_function
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
370 virtual ir_function
*as_function()
375 virtual void accept(ir_visitor
*v
)
380 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
382 void add_signature(ir_function_signature
*sig
)
384 sig
->_function
= this;
385 this->signatures
.push_tail(sig
);
389 * Get an iterator for the set of function signatures
391 exec_list_iterator
iterator()
393 return signatures
.iterator();
397 * Find a signature that matches a set of actual parameters, taking implicit
398 * conversions into account.
400 ir_function_signature
*matching_signature(const exec_list
*actual_param
);
403 * Find a signature that exactly matches a set of actual parameters without
404 * any implicit type conversions.
406 ir_function_signature
*exact_matching_signature(const exec_list
*actual_ps
);
409 * Name of the function.
413 /** Whether or not this function has a signature that is a built-in. */
414 bool has_builtin_signature();
417 * List of ir_function_signature for each overloaded function with this name.
419 struct exec_list signatures
;
422 inline const char *ir_function_signature::function_name() const
424 return this->_function
->name
;
430 * IR instruction representing high-level if-statements
432 class ir_if
: public ir_instruction
{
434 ir_if(ir_rvalue
*condition
)
435 : condition(condition
)
437 ir_type
= ir_type_if
;
440 virtual ir_if
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
442 virtual ir_if
*as_if()
447 virtual void accept(ir_visitor
*v
)
452 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
454 ir_rvalue
*condition
;
455 /** List of ir_instruction for the body of the then branch */
456 exec_list then_instructions
;
457 /** List of ir_instruction for the body of the else branch */
458 exec_list else_instructions
;
463 * IR instruction representing a high-level loop structure.
465 class ir_loop
: public ir_instruction
{
469 virtual ir_loop
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
471 virtual void accept(ir_visitor
*v
)
476 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
478 virtual ir_loop
*as_loop()
484 * Get an iterator for the instructions of the loop body
486 exec_list_iterator
iterator()
488 return body_instructions
.iterator();
491 /** List of ir_instruction that make up the body of the loop. */
492 exec_list body_instructions
;
495 * \name Loop counter and controls
497 * Represents a loop like a FORTRAN \c do-loop.
500 * If \c from and \c to are the same value, the loop will execute once.
503 ir_rvalue
*from
; /** Value of the loop counter on the first
504 * iteration of the loop.
506 ir_rvalue
*to
; /** Value of the loop counter on the last
507 * iteration of the loop.
509 ir_rvalue
*increment
;
510 ir_variable
*counter
;
513 * Comparison operation in the loop terminator.
515 * If any of the loop control fields are non-\c NULL, this field must be
516 * one of \c ir_binop_less, \c ir_binop_greater, \c ir_binop_lequal,
517 * \c ir_binop_gequal, \c ir_binop_equal, or \c ir_binop_nequal.
524 class ir_assignment
: public ir_instruction
{
526 ir_assignment(ir_rvalue
*lhs
, ir_rvalue
*rhs
, ir_rvalue
*condition
);
529 * Construct an assignment with an explicit write mask
532 * Since a write mask is supplied, the LHS must already be a bare
533 * \c ir_dereference. The cannot be any swizzles in the LHS.
535 ir_assignment(ir_dereference
*lhs
, ir_rvalue
*rhs
, ir_rvalue
*condition
,
536 unsigned write_mask
);
538 virtual ir_assignment
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
540 virtual ir_constant
*constant_expression_value();
542 virtual void accept(ir_visitor
*v
)
547 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
549 virtual ir_assignment
* as_assignment()
555 * Get a whole variable written by an assignment
557 * If the LHS of the assignment writes a whole variable, the variable is
558 * returned. Otherwise \c NULL is returned. Examples of whole-variable
561 * - Assigning to a scalar
562 * - Assigning to all components of a vector
563 * - Whole array (or matrix) assignment
564 * - Whole structure assignment
566 ir_variable
*whole_variable_written();
569 * Set the LHS of an assignment
571 void set_lhs(ir_rvalue
*lhs
);
574 * Left-hand side of the assignment.
576 * This should be treated as read only. If you need to set the LHS of an
577 * assignment, use \c ir_assignment::set_lhs.
582 * Value being assigned
587 * Optional condition for the assignment.
589 ir_rvalue
*condition
;
593 * Component mask written
595 * For non-vector types in the LHS, this field will be zero. For vector
596 * types, a bit will be set for each component that is written. Note that
597 * for \c vec2 and \c vec3 types only the lower bits will ever be set.
599 unsigned write_mask
:4;
602 /* Update ir_expression::num_operands() and operator_strs when
603 * updating this list.
605 enum ir_expression_operation
{
614 ir_unop_exp
, /**< Log base e on gentype */
615 ir_unop_log
, /**< Natural log on gentype */
618 ir_unop_f2i
, /**< Float-to-integer conversion. */
619 ir_unop_i2f
, /**< Integer-to-float conversion. */
620 ir_unop_f2b
, /**< Float-to-boolean conversion */
621 ir_unop_b2f
, /**< Boolean-to-float conversion */
622 ir_unop_i2b
, /**< int-to-boolean conversion */
623 ir_unop_b2i
, /**< Boolean-to-int conversion */
624 ir_unop_u2f
, /**< Unsigned-to-float conversion. */
628 * \name Unary floating-point rounding operations.
638 * \name Trigonometric operations.
646 * \name Partial derivatives.
661 * Takes one of two combinations of arguments:
666 * Does not take integer types.
671 * \name Binary comparison operators
679 * Returns single boolean for whether all components of operands[0]
680 * equal the components of operands[1].
684 * Returns single boolean for whether any component of operands[0]
685 * is not equal to the corresponding component of operands[1].
691 * \name Bit-wise binary operations.
713 class ir_expression
: public ir_rvalue
{
715 ir_expression(int op
, const struct glsl_type
*type
,
716 ir_rvalue
*, ir_rvalue
*);
718 virtual ir_expression
*as_expression()
723 virtual ir_expression
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
725 virtual ir_constant
*constant_expression_value();
727 static unsigned int get_num_operands(ir_expression_operation
);
728 unsigned int get_num_operands() const
730 return get_num_operands(operation
);
734 * Return a string representing this expression's operator.
736 const char *operator_string();
739 * Return a string representing this expression's operator.
741 static const char *operator_string(ir_expression_operation
);
745 * Do a reverse-lookup to translate the given string into an operator.
747 static ir_expression_operation
get_operator(const char *);
749 virtual void accept(ir_visitor
*v
)
754 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
756 ir_expression_operation operation
;
757 ir_rvalue
*operands
[2];
762 * IR instruction representing a function call
764 class ir_call
: public ir_rvalue
{
766 ir_call(ir_function_signature
*callee
, exec_list
*actual_parameters
)
769 ir_type
= ir_type_call
;
770 assert(callee
->return_type
!= NULL
);
771 type
= callee
->return_type
;
772 actual_parameters
->move_nodes_to(& this->actual_parameters
);
775 virtual ir_call
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
777 virtual ir_constant
*constant_expression_value();
779 virtual ir_call
*as_call()
784 virtual void accept(ir_visitor
*v
)
789 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
792 * Get a generic ir_call object when an error occurs
794 * Any allocation will be performed with 'ctx' as talloc owner.
796 static ir_call
*get_error_instruction(void *ctx
);
799 * Get an iterator for the set of acutal parameters
801 exec_list_iterator
iterator()
803 return actual_parameters
.iterator();
807 * Get the name of the function being called.
809 const char *callee_name() const
811 return callee
->function_name();
814 ir_function_signature
*get_callee()
820 * Set the function call target
822 void set_callee(ir_function_signature
*sig
);
825 * Generates an inline version of the function before @ir,
826 * returning the return value of the function.
828 ir_rvalue
*generate_inline(ir_instruction
*ir
);
830 /* List of ir_rvalue of paramaters passed in this call. */
831 exec_list actual_parameters
;
837 this->ir_type
= ir_type_call
;
840 ir_function_signature
*callee
;
845 * \name Jump-like IR instructions.
847 * These include \c break, \c continue, \c return, and \c discard.
850 class ir_jump
: public ir_instruction
{
854 ir_type
= ir_type_unset
;
858 class ir_return
: public ir_jump
{
863 this->ir_type
= ir_type_return
;
866 ir_return(ir_rvalue
*value
)
869 this->ir_type
= ir_type_return
;
872 virtual ir_return
*clone(void *mem_ctx
, struct hash_table
*) const;
874 virtual ir_return
*as_return()
879 ir_rvalue
*get_value() const
884 virtual void accept(ir_visitor
*v
)
889 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
896 * Jump instructions used inside loops
898 * These include \c break and \c continue. The \c break within a loop is
899 * different from the \c break within a switch-statement.
903 class ir_loop_jump
: public ir_jump
{
910 ir_loop_jump(jump_mode mode
)
912 this->ir_type
= ir_type_loop_jump
;
917 virtual ir_loop_jump
*clone(void *mem_ctx
, struct hash_table
*) const;
919 virtual void accept(ir_visitor
*v
)
924 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
926 bool is_break() const
928 return mode
== jump_break
;
931 bool is_continue() const
933 return mode
== jump_continue
;
936 /** Mode selector for the jump instruction. */
939 /** Loop containing this break instruction. */
944 * IR instruction representing discard statements.
946 class ir_discard
: public ir_jump
{
950 this->ir_type
= ir_type_discard
;
951 this->condition
= NULL
;
954 ir_discard(ir_rvalue
*cond
)
956 this->ir_type
= ir_type_discard
;
957 this->condition
= cond
;
960 virtual ir_discard
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
962 virtual void accept(ir_visitor
*v
)
967 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
969 ir_rvalue
*condition
;
975 * Texture sampling opcodes used in ir_texture
977 enum ir_texture_opcode
{
978 ir_tex
, /* Regular texture look-up */
979 ir_txb
, /* Texture look-up with LOD bias */
980 ir_txl
, /* Texture look-up with explicit LOD */
981 ir_txd
, /* Texture look-up with partial derivatvies */
982 ir_txf
/* Texel fetch with explicit LOD */
987 * IR instruction to sample a texture
989 * The specific form of the IR instruction depends on the \c mode value
990 * selected from \c ir_texture_opcodes. In the printed IR, these will
994 * | Projection divisor
995 * | | Shadow comparitor
998 * (tex (sampler) (coordinate) (0 0 0) (1) ( ))
999 * (txb (sampler) (coordinate) (0 0 0) (1) ( ) (bias))
1000 * (txl (sampler) (coordinate) (0 0 0) (1) ( ) (lod))
1001 * (txd (sampler) (coordinate) (0 0 0) (1) ( ) (dPdx dPdy))
1002 * (txf (sampler) (coordinate) (0 0 0) (lod))
1004 class ir_texture
: public ir_rvalue
{
1006 ir_texture(enum ir_texture_opcode op
)
1007 : op(op
), projector(NULL
), shadow_comparitor(NULL
)
1009 this->ir_type
= ir_type_texture
;
1012 virtual ir_texture
*clone(void *mem_ctx
, struct hash_table
*) const;
1014 virtual ir_constant
*constant_expression_value();
1016 virtual void accept(ir_visitor
*v
)
1021 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1024 * Return a string representing the ir_texture_opcode.
1026 const char *opcode_string();
1028 /** Set the sampler and infer the type. */
1029 void set_sampler(ir_dereference
*sampler
);
1032 * Do a reverse-lookup to translate a string into an ir_texture_opcode.
1034 static ir_texture_opcode
get_opcode(const char *);
1036 enum ir_texture_opcode op
;
1038 /** Sampler to use for the texture access. */
1039 ir_dereference
*sampler
;
1041 /** Texture coordinate to sample */
1042 ir_rvalue
*coordinate
;
1045 * Value used for projective divide.
1047 * If there is no projective divide (the common case), this will be
1048 * \c NULL. Optimization passes should check for this to point to a constant
1049 * of 1.0 and replace that with \c NULL.
1051 ir_rvalue
*projector
;
1054 * Coordinate used for comparison on shadow look-ups.
1056 * If there is no shadow comparison, this will be \c NULL. For the
1057 * \c ir_txf opcode, this *must* be \c NULL.
1059 ir_rvalue
*shadow_comparitor
;
1061 /** Explicit texel offsets. */
1062 signed char offsets
[3];
1065 ir_rvalue
*lod
; /**< Floating point LOD */
1066 ir_rvalue
*bias
; /**< Floating point LOD bias */
1068 ir_rvalue
*dPdx
; /**< Partial derivative of coordinate wrt X */
1069 ir_rvalue
*dPdy
; /**< Partial derivative of coordinate wrt Y */
1075 struct ir_swizzle_mask
{
1082 * Number of components in the swizzle.
1084 unsigned num_components
:3;
1087 * Does the swizzle contain duplicate components?
1089 * L-value swizzles cannot contain duplicate components.
1091 unsigned has_duplicates
:1;
1095 class ir_swizzle
: public ir_rvalue
{
1097 ir_swizzle(ir_rvalue
*, unsigned x
, unsigned y
, unsigned z
, unsigned w
,
1100 ir_swizzle(ir_rvalue
*val
, const unsigned *components
, unsigned count
);
1102 ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
);
1104 virtual ir_swizzle
*clone(void *mem_ctx
, struct hash_table
*) const;
1106 virtual ir_constant
*constant_expression_value();
1108 virtual ir_swizzle
*as_swizzle()
1114 * Construct an ir_swizzle from the textual representation. Can fail.
1116 static ir_swizzle
*create(ir_rvalue
*, const char *, unsigned vector_length
);
1118 virtual void accept(ir_visitor
*v
)
1123 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1127 return val
->is_lvalue() && !mask
.has_duplicates
;
1131 * Get the variable that is ultimately referenced by an r-value
1133 virtual ir_variable
*variable_referenced();
1136 ir_swizzle_mask mask
;
1140 * Initialize the mask component of a swizzle
1142 * This is used by the \c ir_swizzle constructors.
1144 void init_mask(const unsigned *components
, unsigned count
);
1148 class ir_dereference
: public ir_rvalue
{
1150 virtual ir_dereference
*clone(void *mem_ctx
, struct hash_table
*) const = 0;
1152 virtual ir_dereference
*as_dereference()
1160 * Get the variable that is ultimately referenced by an r-value
1162 virtual ir_variable
*variable_referenced() = 0;
1166 class ir_dereference_variable
: public ir_dereference
{
1168 ir_dereference_variable(ir_variable
*var
);
1170 virtual ir_dereference_variable
*clone(void *mem_ctx
,
1171 struct hash_table
*) const;
1173 virtual ir_constant
*constant_expression_value();
1175 virtual ir_dereference_variable
*as_dereference_variable()
1181 * Get the variable that is ultimately referenced by an r-value
1183 virtual ir_variable
*variable_referenced()
1188 virtual ir_variable
*whole_variable_referenced()
1190 /* ir_dereference_variable objects always dereference the entire
1191 * variable. However, if this dereference is dereferenced by anything
1192 * else, the complete deferefernce chain is not a whole-variable
1193 * dereference. This method should only be called on the top most
1194 * ir_rvalue in a dereference chain.
1199 virtual void accept(ir_visitor
*v
)
1204 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1207 * Object being dereferenced.
1213 class ir_dereference_array
: public ir_dereference
{
1215 ir_dereference_array(ir_rvalue
*value
, ir_rvalue
*array_index
);
1217 ir_dereference_array(ir_variable
*var
, ir_rvalue
*array_index
);
1219 virtual ir_dereference_array
*clone(void *mem_ctx
,
1220 struct hash_table
*) const;
1222 virtual ir_constant
*constant_expression_value();
1224 virtual ir_dereference_array
*as_dereference_array()
1230 * Get the variable that is ultimately referenced by an r-value
1232 virtual ir_variable
*variable_referenced()
1234 return this->array
->variable_referenced();
1237 virtual void accept(ir_visitor
*v
)
1242 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1245 ir_rvalue
*array_index
;
1248 void set_array(ir_rvalue
*value
);
1252 class ir_dereference_record
: public ir_dereference
{
1254 ir_dereference_record(ir_rvalue
*value
, const char *field
);
1256 ir_dereference_record(ir_variable
*var
, const char *field
);
1258 virtual ir_dereference_record
*clone(void *mem_ctx
,
1259 struct hash_table
*) const;
1261 virtual ir_constant
*constant_expression_value();
1264 * Get the variable that is ultimately referenced by an r-value
1266 virtual ir_variable
*variable_referenced()
1268 return this->record
->variable_referenced();
1271 virtual void accept(ir_visitor
*v
)
1276 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1284 * Data stored in an ir_constant
1286 union ir_constant_data
{
1294 class ir_constant
: public ir_rvalue
{
1296 ir_constant(const struct glsl_type
*type
, const ir_constant_data
*data
);
1297 ir_constant(bool b
);
1298 ir_constant(unsigned int u
);
1300 ir_constant(float f
);
1303 * Construct an ir_constant from a list of ir_constant values
1305 ir_constant(const struct glsl_type
*type
, exec_list
*values
);
1308 * Construct an ir_constant from a scalar component of another ir_constant
1310 * The new \c ir_constant inherits the type of the component from the
1314 * In the case of a matrix constant, the new constant is a scalar, \b not
1317 ir_constant(const ir_constant
*c
, unsigned i
);
1320 * Return a new ir_constant of the specified type containing all zeros.
1322 static ir_constant
*zero(void *mem_ctx
, const glsl_type
*type
);
1324 virtual ir_constant
*clone(void *mem_ctx
, struct hash_table
*) const;
1326 virtual ir_constant
*constant_expression_value();
1328 virtual ir_constant
*as_constant()
1333 virtual void accept(ir_visitor
*v
)
1338 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1341 * Get a particular component of a constant as a specific type
1343 * This is useful, for example, to get a value from an integer constant
1344 * as a float or bool. This appears frequently when constructors are
1345 * called with all constant parameters.
1348 bool get_bool_component(unsigned i
) const;
1349 float get_float_component(unsigned i
) const;
1350 int get_int_component(unsigned i
) const;
1351 unsigned get_uint_component(unsigned i
) const;
1354 ir_constant
*get_array_element(unsigned i
) const;
1356 ir_constant
*get_record_field(const char *name
);
1359 * Determine whether a constant has the same value as another constant
1361 bool has_value(const ir_constant
*) const;
1364 * Value of the constant.
1366 * The field used to back the values supplied by the constant is determined
1367 * by the type associated with the \c ir_instruction. Constants may be
1368 * scalars, vectors, or matrices.
1370 union ir_constant_data value
;
1372 /* Array elements */
1373 ir_constant
**array_elements
;
1375 /* Structure fields */
1376 exec_list components
;
1380 * Parameterless constructor only used by the clone method
1386 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
);
1388 void validate_ir_tree(exec_list
*instructions
);
1391 * Make a clone of each IR instruction in a list
1393 * \param in List of IR instructions that are to be cloned
1394 * \param out List to hold the cloned instructions
1397 clone_ir_list(void *mem_ctx
, exec_list
*out
, const exec_list
*in
);
1400 _mesa_glsl_initialize_variables(exec_list
*instructions
,
1401 struct _mesa_glsl_parse_state
*state
);
1404 _mesa_glsl_initialize_functions(exec_list
*instructions
,
1405 struct _mesa_glsl_parse_state
*state
);
1408 _mesa_glsl_release_functions(void);
1411 reparent_ir(exec_list
*list
, void *mem_ctx
);
1413 struct glsl_symbol_table
;
1416 import_prototypes(const exec_list
*source
, exec_list
*dest
,
1417 struct glsl_symbol_table
*symbols
, void *mem_ctx
);
1420 ir_has_call(ir_instruction
*ir
);
1423 do_set_program_inouts(exec_list
*instructions
, struct gl_program
*prog
);