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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 /** Body of instructions in the function. */
346 struct exec_list body
;
349 /** Function of which this signature is one overload. */
350 class ir_function
*_function
;
352 friend class ir_function
;
357 * Header for tracking multiple overloaded functions with the same name.
358 * Contains a list of ir_function_signatures representing each of the
361 class ir_function
: public ir_instruction
{
363 ir_function(const char *name
);
365 virtual ir_function
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
367 virtual ir_function
*as_function()
372 virtual void accept(ir_visitor
*v
)
377 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
379 void add_signature(ir_function_signature
*sig
)
381 sig
->_function
= this;
382 this->signatures
.push_tail(sig
);
386 * Get an iterator for the set of function signatures
388 exec_list_iterator
iterator()
390 return signatures
.iterator();
394 * Find a signature that matches a set of actual parameters, taking implicit
395 * conversions into account.
397 ir_function_signature
*matching_signature(const exec_list
*actual_param
);
400 * Find a signature that exactly matches a set of actual parameters without
401 * any implicit type conversions.
403 ir_function_signature
*exact_matching_signature(const exec_list
*actual_ps
);
406 * Name of the function.
410 /** Whether or not this function is a built-in. */
411 unsigned is_builtin
:1;
414 * List of ir_function_signature for each overloaded function with this name.
416 struct exec_list signatures
;
419 inline const char *ir_function_signature::function_name() const
421 return this->_function
->name
;
427 * IR instruction representing high-level if-statements
429 class ir_if
: public ir_instruction
{
431 ir_if(ir_rvalue
*condition
)
432 : condition(condition
)
434 ir_type
= ir_type_if
;
437 virtual ir_if
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
439 virtual ir_if
*as_if()
444 virtual void accept(ir_visitor
*v
)
449 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
451 ir_rvalue
*condition
;
452 /** List of ir_instruction for the body of the then branch */
453 exec_list then_instructions
;
454 /** List of ir_instruction for the body of the else branch */
455 exec_list else_instructions
;
460 * IR instruction representing a high-level loop structure.
462 class ir_loop
: public ir_instruction
{
464 ir_loop() : from(NULL
), to(NULL
), increment(NULL
), counter(NULL
)
466 ir_type
= ir_type_loop
;
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
500 ir_rvalue
*increment
;
501 ir_variable
*counter
;
506 class ir_assignment
: public ir_instruction
{
508 ir_assignment(ir_rvalue
*lhs
, ir_rvalue
*rhs
, ir_rvalue
*condition
);
511 * Construct an assignment with an explicit write mask
514 * Since a write mask is supplied, the LHS must already be a bare
515 * \c ir_dereference. The cannot be any swizzles in the LHS.
517 ir_assignment(ir_dereference
*lhs
, ir_rvalue
*rhs
, ir_rvalue
*condition
,
518 unsigned write_mask
);
520 virtual ir_assignment
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
522 virtual ir_constant
*constant_expression_value();
524 virtual void accept(ir_visitor
*v
)
529 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
531 virtual ir_assignment
* as_assignment()
537 * Get a whole variable written by an assignment
539 * If the LHS of the assignment writes a whole variable, the variable is
540 * returned. Otherwise \c NULL is returned. Examples of whole-variable
543 * - Assigning to a scalar
544 * - Assigning to all components of a vector
545 * - Whole array (or matrix) assignment
546 * - Whole structure assignment
548 ir_variable
*whole_variable_written();
551 * Set the LHS of an assignment
553 void set_lhs(ir_rvalue
*lhs
);
556 * Left-hand side of the assignment.
558 * This should be treated as read only. If you need to set the LHS of an
559 * assignment, use \c ir_assignment::set_lhs.
564 * Value being assigned
569 * Optional condition for the assignment.
571 ir_rvalue
*condition
;
575 * Component mask written
577 * For non-vector types in the LHS, this field will be zero. For vector
578 * types, a bit will be set for each component that is written. Note that
579 * for \c vec2 and \c vec3 types only the lower bits will ever be set.
581 unsigned write_mask
:4;
584 /* Update ir_expression::num_operands() and operator_strs when
585 * updating this list.
587 enum ir_expression_operation
{
596 ir_unop_exp
, /**< Log base e on gentype */
597 ir_unop_log
, /**< Natural log on gentype */
600 ir_unop_f2i
, /**< Float-to-integer conversion. */
601 ir_unop_i2f
, /**< Integer-to-float conversion. */
602 ir_unop_f2b
, /**< Float-to-boolean conversion */
603 ir_unop_b2f
, /**< Boolean-to-float conversion */
604 ir_unop_i2b
, /**< int-to-boolean conversion */
605 ir_unop_b2i
, /**< Boolean-to-int conversion */
606 ir_unop_u2f
, /**< Unsigned-to-float conversion. */
610 * \name Unary floating-point rounding operations.
620 * \name Trigonometric operations.
628 * \name Partial derivatives.
641 * Takes one of two combinations of arguments:
646 * Does not take integer types.
651 * \name Binary comparison operators
659 * Returns single boolean for whether all components of operands[0]
660 * equal the components of operands[1].
664 * Returns single boolean for whether any component of operands[0]
665 * is not equal to the corresponding component of operands[1].
671 * \name Bit-wise binary operations.
693 class ir_expression
: public ir_rvalue
{
695 ir_expression(int op
, const struct glsl_type
*type
,
696 ir_rvalue
*, ir_rvalue
*);
698 virtual ir_expression
*as_expression()
703 virtual ir_expression
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
705 virtual ir_constant
*constant_expression_value();
707 static unsigned int get_num_operands(ir_expression_operation
);
708 unsigned int get_num_operands() const
710 return get_num_operands(operation
);
714 * Return a string representing this expression's operator.
716 const char *operator_string();
719 * Do a reverse-lookup to translate the given string into an operator.
721 static ir_expression_operation
get_operator(const char *);
723 virtual void accept(ir_visitor
*v
)
728 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
730 ir_expression_operation operation
;
731 ir_rvalue
*operands
[2];
736 * IR instruction representing a function call
738 class ir_call
: public ir_rvalue
{
740 ir_call(ir_function_signature
*callee
, exec_list
*actual_parameters
)
743 ir_type
= ir_type_call
;
744 assert(callee
->return_type
!= NULL
);
745 type
= callee
->return_type
;
746 actual_parameters
->move_nodes_to(& this->actual_parameters
);
749 virtual ir_call
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
751 virtual ir_constant
*constant_expression_value();
753 virtual ir_call
*as_call()
758 virtual void accept(ir_visitor
*v
)
763 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
766 * Get a generic ir_call object when an error occurs
768 * Any allocation will be performed with 'ctx' as talloc owner.
770 static ir_call
*get_error_instruction(void *ctx
);
773 * Get an iterator for the set of acutal parameters
775 exec_list_iterator
iterator()
777 return actual_parameters
.iterator();
781 * Get the name of the function being called.
783 const char *callee_name() const
785 return callee
->function_name();
788 ir_function_signature
*get_callee()
794 * Set the function call target
796 void set_callee(ir_function_signature
*sig
);
799 * Generates an inline version of the function before @ir,
800 * returning the return value of the function.
802 ir_rvalue
*generate_inline(ir_instruction
*ir
);
804 /* List of ir_rvalue of paramaters passed in this call. */
805 exec_list actual_parameters
;
811 this->ir_type
= ir_type_call
;
814 ir_function_signature
*callee
;
819 * \name Jump-like IR instructions.
821 * These include \c break, \c continue, \c return, and \c discard.
824 class ir_jump
: public ir_instruction
{
828 ir_type
= ir_type_unset
;
832 class ir_return
: public ir_jump
{
837 this->ir_type
= ir_type_return
;
840 ir_return(ir_rvalue
*value
)
843 this->ir_type
= ir_type_return
;
846 virtual ir_return
*clone(void *mem_ctx
, struct hash_table
*) const;
848 virtual ir_return
*as_return()
853 ir_rvalue
*get_value() const
858 virtual void accept(ir_visitor
*v
)
863 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
870 * Jump instructions used inside loops
872 * These include \c break and \c continue. The \c break within a loop is
873 * different from the \c break within a switch-statement.
877 class ir_loop_jump
: public ir_jump
{
884 ir_loop_jump(jump_mode mode
)
886 this->ir_type
= ir_type_loop_jump
;
891 virtual ir_loop_jump
*clone(void *mem_ctx
, struct hash_table
*) const;
893 virtual void accept(ir_visitor
*v
)
898 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
900 bool is_break() const
902 return mode
== jump_break
;
905 bool is_continue() const
907 return mode
== jump_continue
;
910 /** Mode selector for the jump instruction. */
913 /** Loop containing this break instruction. */
918 * IR instruction representing discard statements.
920 class ir_discard
: public ir_jump
{
924 this->ir_type
= ir_type_discard
;
925 this->condition
= NULL
;
928 ir_discard(ir_rvalue
*cond
)
930 this->ir_type
= ir_type_discard
;
931 this->condition
= cond
;
934 virtual ir_discard
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
936 virtual void accept(ir_visitor
*v
)
941 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
943 ir_rvalue
*condition
;
949 * Texture sampling opcodes used in ir_texture
951 enum ir_texture_opcode
{
952 ir_tex
, /* Regular texture look-up */
953 ir_txb
, /* Texture look-up with LOD bias */
954 ir_txl
, /* Texture look-up with explicit LOD */
955 ir_txd
, /* Texture look-up with partial derivatvies */
956 ir_txf
/* Texel fetch with explicit LOD */
961 * IR instruction to sample a texture
963 * The specific form of the IR instruction depends on the \c mode value
964 * selected from \c ir_texture_opcodes. In the printed IR, these will
968 * | Projection divisor
969 * | | Shadow comparitor
972 * (tex (sampler) (coordinate) (0 0 0) (1) ( ))
973 * (txb (sampler) (coordinate) (0 0 0) (1) ( ) (bias))
974 * (txl (sampler) (coordinate) (0 0 0) (1) ( ) (lod))
975 * (txd (sampler) (coordinate) (0 0 0) (1) ( ) (dPdx dPdy))
976 * (txf (sampler) (coordinate) (0 0 0) (lod))
978 class ir_texture
: public ir_rvalue
{
980 ir_texture(enum ir_texture_opcode op
)
981 : op(op
), projector(NULL
), shadow_comparitor(NULL
)
983 this->ir_type
= ir_type_texture
;
986 virtual ir_texture
*clone(void *mem_ctx
, struct hash_table
*) const;
988 virtual ir_constant
*constant_expression_value();
990 virtual void accept(ir_visitor
*v
)
995 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
998 * Return a string representing the ir_texture_opcode.
1000 const char *opcode_string();
1002 /** Set the sampler and infer the type. */
1003 void set_sampler(ir_dereference
*sampler
);
1006 * Do a reverse-lookup to translate a string into an ir_texture_opcode.
1008 static ir_texture_opcode
get_opcode(const char *);
1010 enum ir_texture_opcode op
;
1012 /** Sampler to use for the texture access. */
1013 ir_dereference
*sampler
;
1015 /** Texture coordinate to sample */
1016 ir_rvalue
*coordinate
;
1019 * Value used for projective divide.
1021 * If there is no projective divide (the common case), this will be
1022 * \c NULL. Optimization passes should check for this to point to a constant
1023 * of 1.0 and replace that with \c NULL.
1025 ir_rvalue
*projector
;
1028 * Coordinate used for comparison on shadow look-ups.
1030 * If there is no shadow comparison, this will be \c NULL. For the
1031 * \c ir_txf opcode, this *must* be \c NULL.
1033 ir_rvalue
*shadow_comparitor
;
1035 /** Explicit texel offsets. */
1036 signed char offsets
[3];
1039 ir_rvalue
*lod
; /**< Floating point LOD */
1040 ir_rvalue
*bias
; /**< Floating point LOD bias */
1042 ir_rvalue
*dPdx
; /**< Partial derivative of coordinate wrt X */
1043 ir_rvalue
*dPdy
; /**< Partial derivative of coordinate wrt Y */
1049 struct ir_swizzle_mask
{
1056 * Number of components in the swizzle.
1058 unsigned num_components
:3;
1061 * Does the swizzle contain duplicate components?
1063 * L-value swizzles cannot contain duplicate components.
1065 unsigned has_duplicates
:1;
1069 class ir_swizzle
: public ir_rvalue
{
1071 ir_swizzle(ir_rvalue
*, unsigned x
, unsigned y
, unsigned z
, unsigned w
,
1074 ir_swizzle(ir_rvalue
*val
, const unsigned *components
, unsigned count
);
1076 ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
);
1078 virtual ir_swizzle
*clone(void *mem_ctx
, struct hash_table
*) const;
1080 virtual ir_constant
*constant_expression_value();
1082 virtual ir_swizzle
*as_swizzle()
1088 * Construct an ir_swizzle from the textual representation. Can fail.
1090 static ir_swizzle
*create(ir_rvalue
*, const char *, unsigned vector_length
);
1092 virtual void accept(ir_visitor
*v
)
1097 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1101 return val
->is_lvalue() && !mask
.has_duplicates
;
1105 * Get the variable that is ultimately referenced by an r-value
1107 virtual ir_variable
*variable_referenced();
1110 ir_swizzle_mask mask
;
1114 * Initialize the mask component of a swizzle
1116 * This is used by the \c ir_swizzle constructors.
1118 void init_mask(const unsigned *components
, unsigned count
);
1122 class ir_dereference
: public ir_rvalue
{
1124 virtual ir_dereference
*clone(void *mem_ctx
, struct hash_table
*) const = 0;
1126 virtual ir_dereference
*as_dereference()
1134 * Get the variable that is ultimately referenced by an r-value
1136 virtual ir_variable
*variable_referenced() = 0;
1140 class ir_dereference_variable
: public ir_dereference
{
1142 ir_dereference_variable(ir_variable
*var
);
1144 virtual ir_dereference_variable
*clone(void *mem_ctx
,
1145 struct hash_table
*) const;
1147 virtual ir_constant
*constant_expression_value();
1149 virtual ir_dereference_variable
*as_dereference_variable()
1155 * Get the variable that is ultimately referenced by an r-value
1157 virtual ir_variable
*variable_referenced()
1162 virtual ir_variable
*whole_variable_referenced()
1164 /* ir_dereference_variable objects always dereference the entire
1165 * variable. However, if this dereference is dereferenced by anything
1166 * else, the complete deferefernce chain is not a whole-variable
1167 * dereference. This method should only be called on the top most
1168 * ir_rvalue in a dereference chain.
1173 virtual void accept(ir_visitor
*v
)
1178 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1181 * Object being dereferenced.
1187 class ir_dereference_array
: public ir_dereference
{
1189 ir_dereference_array(ir_rvalue
*value
, ir_rvalue
*array_index
);
1191 ir_dereference_array(ir_variable
*var
, ir_rvalue
*array_index
);
1193 virtual ir_dereference_array
*clone(void *mem_ctx
,
1194 struct hash_table
*) const;
1196 virtual ir_constant
*constant_expression_value();
1198 virtual ir_dereference_array
*as_dereference_array()
1204 * Get the variable that is ultimately referenced by an r-value
1206 virtual ir_variable
*variable_referenced()
1208 return this->array
->variable_referenced();
1211 virtual void accept(ir_visitor
*v
)
1216 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1219 ir_rvalue
*array_index
;
1222 void set_array(ir_rvalue
*value
);
1226 class ir_dereference_record
: public ir_dereference
{
1228 ir_dereference_record(ir_rvalue
*value
, const char *field
);
1230 ir_dereference_record(ir_variable
*var
, const char *field
);
1232 virtual ir_dereference_record
*clone(void *mem_ctx
,
1233 struct hash_table
*) const;
1235 virtual ir_constant
*constant_expression_value();
1238 * Get the variable that is ultimately referenced by an r-value
1240 virtual ir_variable
*variable_referenced()
1242 return this->record
->variable_referenced();
1245 virtual void accept(ir_visitor
*v
)
1250 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1258 * Data stored in an ir_constant
1260 union ir_constant_data
{
1268 class ir_constant
: public ir_rvalue
{
1270 ir_constant(const struct glsl_type
*type
, const ir_constant_data
*data
);
1271 ir_constant(bool b
);
1272 ir_constant(unsigned int u
);
1274 ir_constant(float f
);
1277 * Construct an ir_constant from a list of ir_constant values
1279 ir_constant(const struct glsl_type
*type
, exec_list
*values
);
1282 * Construct an ir_constant from a scalar component of another ir_constant
1284 * The new \c ir_constant inherits the type of the component from the
1288 * In the case of a matrix constant, the new constant is a scalar, \b not
1291 ir_constant(const ir_constant
*c
, unsigned i
);
1294 * Return a new ir_constant of the specified type containing all zeros.
1296 static ir_constant
*zero(void *mem_ctx
, const glsl_type
*type
);
1298 virtual ir_constant
*clone(void *mem_ctx
, struct hash_table
*) const;
1300 virtual ir_constant
*constant_expression_value();
1302 virtual ir_constant
*as_constant()
1307 virtual void accept(ir_visitor
*v
)
1312 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1315 * Get a particular component of a constant as a specific type
1317 * This is useful, for example, to get a value from an integer constant
1318 * as a float or bool. This appears frequently when constructors are
1319 * called with all constant parameters.
1322 bool get_bool_component(unsigned i
) const;
1323 float get_float_component(unsigned i
) const;
1324 int get_int_component(unsigned i
) const;
1325 unsigned get_uint_component(unsigned i
) const;
1328 ir_constant
*get_array_element(unsigned i
) const;
1330 ir_constant
*get_record_field(const char *name
);
1333 * Determine whether a constant has the same value as another constant
1335 bool has_value(const ir_constant
*) const;
1338 * Value of the constant.
1340 * The field used to back the values supplied by the constant is determined
1341 * by the type associated with the \c ir_instruction. Constants may be
1342 * scalars, vectors, or matrices.
1344 union ir_constant_data value
;
1346 /* Array elements */
1347 ir_constant
**array_elements
;
1349 /* Structure fields */
1350 exec_list components
;
1354 * Parameterless constructor only used by the clone method
1360 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
);
1362 void validate_ir_tree(exec_list
*instructions
);
1365 * Make a clone of each IR instruction in a list
1367 * \param in List of IR instructions that are to be cloned
1368 * \param out List to hold the cloned instructions
1371 clone_ir_list(void *mem_ctx
, exec_list
*out
, const exec_list
*in
);
1374 _mesa_glsl_initialize_variables(exec_list
*instructions
,
1375 struct _mesa_glsl_parse_state
*state
);
1378 _mesa_glsl_initialize_functions(exec_list
*instructions
,
1379 struct _mesa_glsl_parse_state
*state
);
1382 _mesa_glsl_release_functions(void);
1385 reparent_ir(exec_list
*list
, void *mem_ctx
);
1387 struct glsl_symbol_table
;
1390 import_prototypes(const exec_list
*source
, exec_list
*dest
,
1391 struct glsl_symbol_table
*symbols
, void *mem_ctx
);
1394 ir_has_call(ir_instruction
*ir
);
1397 do_set_program_inouts(exec_list
*instructions
, struct gl_program
*prog
);