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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
{
466 virtual ir_loop
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
468 virtual void accept(ir_visitor
*v
)
473 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
475 virtual ir_loop
*as_loop()
481 * Get an iterator for the instructions of the loop body
483 exec_list_iterator
iterator()
485 return body_instructions
.iterator();
488 /** List of ir_instruction that make up the body of the loop. */
489 exec_list body_instructions
;
492 * \name Loop counter and controls
494 * Represents a loop like a FORTRAN \c do-loop.
497 * If \c from and \c to are the same value, the loop will execute once.
500 ir_rvalue
*from
; /** Value of the loop counter on the first
501 * iteration of the loop.
503 ir_rvalue
*to
; /** Value of the loop counter on the last
504 * iteration of the loop.
506 ir_rvalue
*increment
;
507 ir_variable
*counter
;
510 * Comparison operation in the loop terminator.
512 * If any of the loop control fields are non-\c NULL, this field must be
513 * one of \c ir_binop_less, \c ir_binop_greater, \c ir_binop_lequal,
514 * \c ir_binop_gequal, \c ir_binop_equal, or \c ir_binop_nequal.
521 class ir_assignment
: public ir_instruction
{
523 ir_assignment(ir_rvalue
*lhs
, ir_rvalue
*rhs
, ir_rvalue
*condition
);
526 * Construct an assignment with an explicit write mask
529 * Since a write mask is supplied, the LHS must already be a bare
530 * \c ir_dereference. The cannot be any swizzles in the LHS.
532 ir_assignment(ir_dereference
*lhs
, ir_rvalue
*rhs
, ir_rvalue
*condition
,
533 unsigned write_mask
);
535 virtual ir_assignment
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
537 virtual ir_constant
*constant_expression_value();
539 virtual void accept(ir_visitor
*v
)
544 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
546 virtual ir_assignment
* as_assignment()
552 * Get a whole variable written by an assignment
554 * If the LHS of the assignment writes a whole variable, the variable is
555 * returned. Otherwise \c NULL is returned. Examples of whole-variable
558 * - Assigning to a scalar
559 * - Assigning to all components of a vector
560 * - Whole array (or matrix) assignment
561 * - Whole structure assignment
563 ir_variable
*whole_variable_written();
566 * Set the LHS of an assignment
568 void set_lhs(ir_rvalue
*lhs
);
571 * Left-hand side of the assignment.
573 * This should be treated as read only. If you need to set the LHS of an
574 * assignment, use \c ir_assignment::set_lhs.
579 * Value being assigned
584 * Optional condition for the assignment.
586 ir_rvalue
*condition
;
590 * Component mask written
592 * For non-vector types in the LHS, this field will be zero. For vector
593 * types, a bit will be set for each component that is written. Note that
594 * for \c vec2 and \c vec3 types only the lower bits will ever be set.
596 unsigned write_mask
:4;
599 /* Update ir_expression::num_operands() and operator_strs when
600 * updating this list.
602 enum ir_expression_operation
{
611 ir_unop_exp
, /**< Log base e on gentype */
612 ir_unop_log
, /**< Natural log on gentype */
615 ir_unop_f2i
, /**< Float-to-integer conversion. */
616 ir_unop_i2f
, /**< Integer-to-float conversion. */
617 ir_unop_f2b
, /**< Float-to-boolean conversion */
618 ir_unop_b2f
, /**< Boolean-to-float conversion */
619 ir_unop_i2b
, /**< int-to-boolean conversion */
620 ir_unop_b2i
, /**< Boolean-to-int conversion */
621 ir_unop_u2f
, /**< Unsigned-to-float conversion. */
625 * \name Unary floating-point rounding operations.
635 * \name Trigonometric operations.
643 * \name Partial derivatives.
656 * Takes one of two combinations of arguments:
661 * Does not take integer types.
666 * \name Binary comparison operators
674 * Returns single boolean for whether all components of operands[0]
675 * equal the components of operands[1].
679 * Returns single boolean for whether any component of operands[0]
680 * is not equal to the corresponding component of operands[1].
686 * \name Bit-wise binary operations.
708 class ir_expression
: public ir_rvalue
{
710 ir_expression(int op
, const struct glsl_type
*type
,
711 ir_rvalue
*, ir_rvalue
*);
713 virtual ir_expression
*as_expression()
718 virtual ir_expression
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
720 virtual ir_constant
*constant_expression_value();
722 static unsigned int get_num_operands(ir_expression_operation
);
723 unsigned int get_num_operands() const
725 return get_num_operands(operation
);
729 * Return a string representing this expression's operator.
731 const char *operator_string();
734 * Return a string representing this expression's operator.
736 static const char *operator_string(ir_expression_operation
);
740 * Do a reverse-lookup to translate the given string into an operator.
742 static ir_expression_operation
get_operator(const char *);
744 virtual void accept(ir_visitor
*v
)
749 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
751 ir_expression_operation operation
;
752 ir_rvalue
*operands
[2];
757 * IR instruction representing a function call
759 class ir_call
: public ir_rvalue
{
761 ir_call(ir_function_signature
*callee
, exec_list
*actual_parameters
)
764 ir_type
= ir_type_call
;
765 assert(callee
->return_type
!= NULL
);
766 type
= callee
->return_type
;
767 actual_parameters
->move_nodes_to(& this->actual_parameters
);
770 virtual ir_call
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
772 virtual ir_constant
*constant_expression_value();
774 virtual ir_call
*as_call()
779 virtual void accept(ir_visitor
*v
)
784 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
787 * Get a generic ir_call object when an error occurs
789 * Any allocation will be performed with 'ctx' as talloc owner.
791 static ir_call
*get_error_instruction(void *ctx
);
794 * Get an iterator for the set of acutal parameters
796 exec_list_iterator
iterator()
798 return actual_parameters
.iterator();
802 * Get the name of the function being called.
804 const char *callee_name() const
806 return callee
->function_name();
809 ir_function_signature
*get_callee()
815 * Set the function call target
817 void set_callee(ir_function_signature
*sig
);
820 * Generates an inline version of the function before @ir,
821 * returning the return value of the function.
823 ir_rvalue
*generate_inline(ir_instruction
*ir
);
825 /* List of ir_rvalue of paramaters passed in this call. */
826 exec_list actual_parameters
;
832 this->ir_type
= ir_type_call
;
835 ir_function_signature
*callee
;
840 * \name Jump-like IR instructions.
842 * These include \c break, \c continue, \c return, and \c discard.
845 class ir_jump
: public ir_instruction
{
849 ir_type
= ir_type_unset
;
853 class ir_return
: public ir_jump
{
858 this->ir_type
= ir_type_return
;
861 ir_return(ir_rvalue
*value
)
864 this->ir_type
= ir_type_return
;
867 virtual ir_return
*clone(void *mem_ctx
, struct hash_table
*) const;
869 virtual ir_return
*as_return()
874 ir_rvalue
*get_value() const
879 virtual void accept(ir_visitor
*v
)
884 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
891 * Jump instructions used inside loops
893 * These include \c break and \c continue. The \c break within a loop is
894 * different from the \c break within a switch-statement.
898 class ir_loop_jump
: public ir_jump
{
905 ir_loop_jump(jump_mode mode
)
907 this->ir_type
= ir_type_loop_jump
;
912 virtual ir_loop_jump
*clone(void *mem_ctx
, struct hash_table
*) const;
914 virtual void accept(ir_visitor
*v
)
919 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
921 bool is_break() const
923 return mode
== jump_break
;
926 bool is_continue() const
928 return mode
== jump_continue
;
931 /** Mode selector for the jump instruction. */
934 /** Loop containing this break instruction. */
939 * IR instruction representing discard statements.
941 class ir_discard
: public ir_jump
{
945 this->ir_type
= ir_type_discard
;
946 this->condition
= NULL
;
949 ir_discard(ir_rvalue
*cond
)
951 this->ir_type
= ir_type_discard
;
952 this->condition
= cond
;
955 virtual ir_discard
*clone(void *mem_ctx
, struct hash_table
*ht
) const;
957 virtual void accept(ir_visitor
*v
)
962 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
964 ir_rvalue
*condition
;
970 * Texture sampling opcodes used in ir_texture
972 enum ir_texture_opcode
{
973 ir_tex
, /* Regular texture look-up */
974 ir_txb
, /* Texture look-up with LOD bias */
975 ir_txl
, /* Texture look-up with explicit LOD */
976 ir_txd
, /* Texture look-up with partial derivatvies */
977 ir_txf
/* Texel fetch with explicit LOD */
982 * IR instruction to sample a texture
984 * The specific form of the IR instruction depends on the \c mode value
985 * selected from \c ir_texture_opcodes. In the printed IR, these will
989 * | Projection divisor
990 * | | Shadow comparitor
993 * (tex (sampler) (coordinate) (0 0 0) (1) ( ))
994 * (txb (sampler) (coordinate) (0 0 0) (1) ( ) (bias))
995 * (txl (sampler) (coordinate) (0 0 0) (1) ( ) (lod))
996 * (txd (sampler) (coordinate) (0 0 0) (1) ( ) (dPdx dPdy))
997 * (txf (sampler) (coordinate) (0 0 0) (lod))
999 class ir_texture
: public ir_rvalue
{
1001 ir_texture(enum ir_texture_opcode op
)
1002 : op(op
), projector(NULL
), shadow_comparitor(NULL
)
1004 this->ir_type
= ir_type_texture
;
1007 virtual ir_texture
*clone(void *mem_ctx
, struct hash_table
*) const;
1009 virtual ir_constant
*constant_expression_value();
1011 virtual void accept(ir_visitor
*v
)
1016 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1019 * Return a string representing the ir_texture_opcode.
1021 const char *opcode_string();
1023 /** Set the sampler and infer the type. */
1024 void set_sampler(ir_dereference
*sampler
);
1027 * Do a reverse-lookup to translate a string into an ir_texture_opcode.
1029 static ir_texture_opcode
get_opcode(const char *);
1031 enum ir_texture_opcode op
;
1033 /** Sampler to use for the texture access. */
1034 ir_dereference
*sampler
;
1036 /** Texture coordinate to sample */
1037 ir_rvalue
*coordinate
;
1040 * Value used for projective divide.
1042 * If there is no projective divide (the common case), this will be
1043 * \c NULL. Optimization passes should check for this to point to a constant
1044 * of 1.0 and replace that with \c NULL.
1046 ir_rvalue
*projector
;
1049 * Coordinate used for comparison on shadow look-ups.
1051 * If there is no shadow comparison, this will be \c NULL. For the
1052 * \c ir_txf opcode, this *must* be \c NULL.
1054 ir_rvalue
*shadow_comparitor
;
1056 /** Explicit texel offsets. */
1057 signed char offsets
[3];
1060 ir_rvalue
*lod
; /**< Floating point LOD */
1061 ir_rvalue
*bias
; /**< Floating point LOD bias */
1063 ir_rvalue
*dPdx
; /**< Partial derivative of coordinate wrt X */
1064 ir_rvalue
*dPdy
; /**< Partial derivative of coordinate wrt Y */
1070 struct ir_swizzle_mask
{
1077 * Number of components in the swizzle.
1079 unsigned num_components
:3;
1082 * Does the swizzle contain duplicate components?
1084 * L-value swizzles cannot contain duplicate components.
1086 unsigned has_duplicates
:1;
1090 class ir_swizzle
: public ir_rvalue
{
1092 ir_swizzle(ir_rvalue
*, unsigned x
, unsigned y
, unsigned z
, unsigned w
,
1095 ir_swizzle(ir_rvalue
*val
, const unsigned *components
, unsigned count
);
1097 ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
);
1099 virtual ir_swizzle
*clone(void *mem_ctx
, struct hash_table
*) const;
1101 virtual ir_constant
*constant_expression_value();
1103 virtual ir_swizzle
*as_swizzle()
1109 * Construct an ir_swizzle from the textual representation. Can fail.
1111 static ir_swizzle
*create(ir_rvalue
*, const char *, unsigned vector_length
);
1113 virtual void accept(ir_visitor
*v
)
1118 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1122 return val
->is_lvalue() && !mask
.has_duplicates
;
1126 * Get the variable that is ultimately referenced by an r-value
1128 virtual ir_variable
*variable_referenced();
1131 ir_swizzle_mask mask
;
1135 * Initialize the mask component of a swizzle
1137 * This is used by the \c ir_swizzle constructors.
1139 void init_mask(const unsigned *components
, unsigned count
);
1143 class ir_dereference
: public ir_rvalue
{
1145 virtual ir_dereference
*clone(void *mem_ctx
, struct hash_table
*) const = 0;
1147 virtual ir_dereference
*as_dereference()
1155 * Get the variable that is ultimately referenced by an r-value
1157 virtual ir_variable
*variable_referenced() = 0;
1161 class ir_dereference_variable
: public ir_dereference
{
1163 ir_dereference_variable(ir_variable
*var
);
1165 virtual ir_dereference_variable
*clone(void *mem_ctx
,
1166 struct hash_table
*) const;
1168 virtual ir_constant
*constant_expression_value();
1170 virtual ir_dereference_variable
*as_dereference_variable()
1176 * Get the variable that is ultimately referenced by an r-value
1178 virtual ir_variable
*variable_referenced()
1183 virtual ir_variable
*whole_variable_referenced()
1185 /* ir_dereference_variable objects always dereference the entire
1186 * variable. However, if this dereference is dereferenced by anything
1187 * else, the complete deferefernce chain is not a whole-variable
1188 * dereference. This method should only be called on the top most
1189 * ir_rvalue in a dereference chain.
1194 virtual void accept(ir_visitor
*v
)
1199 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1202 * Object being dereferenced.
1208 class ir_dereference_array
: public ir_dereference
{
1210 ir_dereference_array(ir_rvalue
*value
, ir_rvalue
*array_index
);
1212 ir_dereference_array(ir_variable
*var
, ir_rvalue
*array_index
);
1214 virtual ir_dereference_array
*clone(void *mem_ctx
,
1215 struct hash_table
*) const;
1217 virtual ir_constant
*constant_expression_value();
1219 virtual ir_dereference_array
*as_dereference_array()
1225 * Get the variable that is ultimately referenced by an r-value
1227 virtual ir_variable
*variable_referenced()
1229 return this->array
->variable_referenced();
1232 virtual void accept(ir_visitor
*v
)
1237 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1240 ir_rvalue
*array_index
;
1243 void set_array(ir_rvalue
*value
);
1247 class ir_dereference_record
: public ir_dereference
{
1249 ir_dereference_record(ir_rvalue
*value
, const char *field
);
1251 ir_dereference_record(ir_variable
*var
, const char *field
);
1253 virtual ir_dereference_record
*clone(void *mem_ctx
,
1254 struct hash_table
*) const;
1256 virtual ir_constant
*constant_expression_value();
1259 * Get the variable that is ultimately referenced by an r-value
1261 virtual ir_variable
*variable_referenced()
1263 return this->record
->variable_referenced();
1266 virtual void accept(ir_visitor
*v
)
1271 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1279 * Data stored in an ir_constant
1281 union ir_constant_data
{
1289 class ir_constant
: public ir_rvalue
{
1291 ir_constant(const struct glsl_type
*type
, const ir_constant_data
*data
);
1292 ir_constant(bool b
);
1293 ir_constant(unsigned int u
);
1295 ir_constant(float f
);
1298 * Construct an ir_constant from a list of ir_constant values
1300 ir_constant(const struct glsl_type
*type
, exec_list
*values
);
1303 * Construct an ir_constant from a scalar component of another ir_constant
1305 * The new \c ir_constant inherits the type of the component from the
1309 * In the case of a matrix constant, the new constant is a scalar, \b not
1312 ir_constant(const ir_constant
*c
, unsigned i
);
1315 * Return a new ir_constant of the specified type containing all zeros.
1317 static ir_constant
*zero(void *mem_ctx
, const glsl_type
*type
);
1319 virtual ir_constant
*clone(void *mem_ctx
, struct hash_table
*) const;
1321 virtual ir_constant
*constant_expression_value();
1323 virtual ir_constant
*as_constant()
1328 virtual void accept(ir_visitor
*v
)
1333 virtual ir_visitor_status
accept(ir_hierarchical_visitor
*);
1336 * Get a particular component of a constant as a specific type
1338 * This is useful, for example, to get a value from an integer constant
1339 * as a float or bool. This appears frequently when constructors are
1340 * called with all constant parameters.
1343 bool get_bool_component(unsigned i
) const;
1344 float get_float_component(unsigned i
) const;
1345 int get_int_component(unsigned i
) const;
1346 unsigned get_uint_component(unsigned i
) const;
1349 ir_constant
*get_array_element(unsigned i
) const;
1351 ir_constant
*get_record_field(const char *name
);
1354 * Determine whether a constant has the same value as another constant
1356 bool has_value(const ir_constant
*) const;
1359 * Value of the constant.
1361 * The field used to back the values supplied by the constant is determined
1362 * by the type associated with the \c ir_instruction. Constants may be
1363 * scalars, vectors, or matrices.
1365 union ir_constant_data value
;
1367 /* Array elements */
1368 ir_constant
**array_elements
;
1370 /* Structure fields */
1371 exec_list components
;
1375 * Parameterless constructor only used by the clone method
1381 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
);
1383 void validate_ir_tree(exec_list
*instructions
);
1386 * Make a clone of each IR instruction in a list
1388 * \param in List of IR instructions that are to be cloned
1389 * \param out List to hold the cloned instructions
1392 clone_ir_list(void *mem_ctx
, exec_list
*out
, const exec_list
*in
);
1395 _mesa_glsl_initialize_variables(exec_list
*instructions
,
1396 struct _mesa_glsl_parse_state
*state
);
1399 _mesa_glsl_initialize_functions(exec_list
*instructions
,
1400 struct _mesa_glsl_parse_state
*state
);
1403 _mesa_glsl_release_functions(void);
1406 reparent_ir(exec_list
*list
, void *mem_ctx
);
1408 struct glsl_symbol_table
;
1411 import_prototypes(const exec_list
*source
, exec_list
*dest
,
1412 struct glsl_symbol_table
*symbols
, void *mem_ctx
);
1415 ir_has_call(ir_instruction
*ir
);
1418 do_set_program_inouts(exec_list
*instructions
, struct gl_program
*prog
);