#ifndef IR_H
#define IR_H
+#include <cstdio>
+#include <cstdlib>
+
#include "list.h"
#include "ir_visitor.h"
+#include "ir_hierarchical_visitor.h"
struct ir_program {
void *bong_hits;
const struct glsl_type *type;
class ir_constant *constant_expression_value();
+
+ /** ir_print_visitor helper for debugging. */
+ void print(void);
+
virtual void accept(ir_visitor *) = 0;
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *) = 0;
/**
* \name IR instruction downcast functions
*/
/*@{*/
virtual class ir_variable * as_variable() { return NULL; }
+ virtual class ir_function * as_function() { return NULL; }
virtual class ir_dereference * as_dereference() { return NULL; }
+ virtual class ir_dereference_array * as_dereference_array() { return NULL; }
virtual class ir_rvalue * as_rvalue() { return NULL; }
virtual class ir_loop * as_loop() { return NULL; }
virtual class ir_assignment * as_assignment() { return NULL; }
virtual class ir_call * as_call() { return NULL; }
virtual class ir_return * as_return() { return NULL; }
virtual class ir_if * as_if() { return NULL; }
+ virtual class ir_swizzle * as_swizzle() { return NULL; }
+ virtual class ir_constant * as_constant() { return NULL; }
/*@}*/
protected:
return false;
}
+ /**
+ * Get the variable that is ultimately referenced by an r-value
+ */
+ virtual ir_variable *variable_referenced()
+ {
+ return NULL;
+ }
+
+
+ /**
+ * If an r-value is a reference to a whole variable, get that variable
+ *
+ * \return
+ * Pointer to a variable that is completely dereferenced by the r-value. If
+ * the r-value is not a dereference or the dereference does not access the
+ * entire variable (i.e., it's just one array element, struct field), \c NULL
+ * is returned.
+ */
+ virtual ir_variable *whole_variable_referenced()
+ {
+ return NULL;
+ }
+
protected:
ir_rvalue()
{
v->visit(this);
}
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
/**
* Duplicate an IR variable
*
return var;
}
+ /**
+ * Get the string value for the interpolation qualifier
+ *
+ * \return
+ * If none of \c shader_in or \c shader_out is set, an empty string will
+ * be returned. Otherwise the string that would be used in a shader to
+ * specify \c mode will be returned.
+ */
+ const char *interpolation_string() const;
+
const char *name;
/**
};
-class ir_label : public ir_instruction {
-public:
- ir_label(const char *label, ir_function_signature *signature);
-
- virtual void accept(ir_visitor *v)
- {
- v->visit(this);
- }
-
- const char *label;
-
- ir_function_signature *signature;
-};
-
-
/*@{*/
+/**
+ * The representation of a function instance; may be the full definition or
+ * simply a prototype.
+ */
class ir_function_signature : public ir_instruction {
/* An ir_function_signature will be part of the list of signatures in
* an ir_function.
v->visit(this);
}
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
/**
* Get the name of the function for which this is a signature
*/
const char *function_name() const;
+ /**
+ * Check whether the qualifiers match between this signature's parameters
+ * and the supplied parameter list. If not, returns the name of the first
+ * parameter with mismatched qualifiers (for use in error messages).
+ */
+ const char *qualifiers_match(exec_list *params);
+
+ /**
+ * Replace the current parameter list with the given one. This is useful
+ * if the current information came from a prototype, and either has invalid
+ * or missing parameter names.
+ */
+ void replace_parameters(exec_list *new_params);
+
/**
* Function return type.
*
*/
struct exec_list parameters;
- /**
- * Pointer to the label that begins the function definition.
- */
- ir_label *definition;
+ /** Whether or not this function has a body (which may be empty). */
+ unsigned is_defined:1;
/** Body of instructions in the function. */
struct exec_list body;
/**
- * Header for tracking functions in the symbol table
+ * Header for tracking multiple overloaded functions with the same name.
+ * Contains a list of ir_function_signatures representing each of the
+ * actual functions.
*/
class ir_function : public ir_instruction {
public:
ir_function(const char *name);
+ virtual ir_function *as_function()
+ {
+ return this;
+ }
+
virtual void accept(ir_visitor *v)
{
v->visit(this);
}
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
void add_signature(ir_function_signature *sig)
{
sig->function = this;
}
/**
- * Find a signature that matches a set of actual parameters.
+ * Find a signature that matches a set of actual parameters, taking implicit
+ * conversions into account.
*/
const ir_function_signature *matching_signature(exec_list *actual_param);
+ /**
+ * Find a signature that exactly matches a set of actual parameters without
+ * any implicit type conversions.
+ */
+ ir_function_signature *exact_matching_signature(exec_list *actual_ps);
+
/**
* Name of the function.
*/
v->visit(this);
}
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
ir_rvalue *condition;
/** List of ir_instruction for the body of the then branch */
exec_list then_instructions;
v->visit(this);
}
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
virtual ir_loop *as_loop()
{
return this;
v->visit(this);
}
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
virtual ir_assignment * as_assignment()
{
return this;
ir_rvalue *condition;
};
-/* Update ir_expression::num_operands() and ir_print_visitor.cpp when
+/* Update ir_expression::num_operands() and operator_strs when
* updating this list.
-*/
+ */
enum ir_expression_operation {
ir_unop_bit_not,
ir_unop_logic_not,
ir_unop_neg,
ir_unop_abs,
+ ir_unop_sign,
ir_unop_rcp,
ir_unop_rsq,
ir_unop_sqrt,
ir_unop_floor,
/*@}*/
+ /**
+ * \name Trigonometric operations.
+ */
+ /*@{*/
+ ir_unop_sin,
+ ir_unop_cos,
+ /*@}*/
+
+ /**
+ * \name Partial derivatives.
+ */
+ /*@{*/
+ ir_unop_dFdx,
+ ir_unop_dFdy,
+ /*@}*/
+
ir_binop_add,
ir_binop_sub,
ir_binop_mul,
ir_expression(int op, const struct glsl_type *type,
ir_rvalue *, ir_rvalue *);
- unsigned int get_num_operands(void);
+ static unsigned int get_num_operands(ir_expression_operation);
+ unsigned int get_num_operands()
+ {
+ return get_num_operands(operation);
+ }
+
+ /**
+ * Return a string representing this expression's operator.
+ */
+ const char *operator_string();
+
+ /**
+ * Do a reverse-lookup to translate the given string into an operator.
+ */
+ static ir_expression_operation get_operator(const char *);
virtual void accept(ir_visitor *v)
{
v->visit(this);
}
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
ir_expression *clone();
ir_expression_operation operation;
v->visit(this);
}
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
/**
* Get a generic ir_call object when an error occurs
*/
v->visit(this);
}
-private:
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
ir_rvalue *value;
};
v->visit(this);
}
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
bool is_break() const
{
return mode == jump_break;
/*@}*/
+/**
+ * Texture sampling opcodes used in ir_texture
+ */
+enum ir_texture_opcode {
+ ir_tex, /* Regular texture look-up */
+ ir_txb, /* Texture look-up with LOD bias */
+ ir_txl, /* Texture look-up with explicit LOD */
+ ir_txd, /* Texture look-up with partial derivatvies */
+ ir_txf /* Texel fetch with explicit LOD */
+};
+
+
+/**
+ * IR instruction to sample a texture
+ *
+ * The specific form of the IR instruction depends on the \c mode value
+ * selected from \c ir_texture_opcodes. In the printed IR, these will
+ * appear as:
+ *
+ * Texel offset
+ * | Projection divisor
+ * | | Shadow comparitor
+ * | | |
+ * v v v
+ * (tex (sampler) (coordinate) (0 0 0) (1) ( ))
+ * (txb (sampler) (coordinate) (0 0 0) (1) ( ) (bias))
+ * (txl (sampler) (coordinate) (0 0 0) (1) ( ) (lod))
+ * (txd (sampler) (coordinate) (0 0 0) (1) ( ) (dPdx dPdy))
+ * (txf (sampler) (coordinate) (0 0 0) (lod))
+ */
+class ir_texture : public ir_rvalue {
+public:
+ ir_texture(enum ir_texture_opcode op)
+ : op(op), projector(NULL), shadow_comparitor(NULL)
+ {
+ /* empty */
+ }
+
+ virtual void accept(ir_visitor *v)
+ {
+ v->visit(this);
+ }
+
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
+ /**
+ * Return a string representing the ir_texture_opcode.
+ */
+ const char *opcode_string();
+
+ /** Set the sampler and infer the type. */
+ void set_sampler(ir_dereference *sampler);
+
+ /**
+ * Do a reverse-lookup to translate a string into an ir_texture_opcode.
+ */
+ static ir_texture_opcode get_opcode(const char *);
+
+ enum ir_texture_opcode op;
+
+ /** Sampler to use for the texture access. */
+ ir_dereference *sampler;
+
+ /** Texture coordinate to sample */
+ ir_rvalue *coordinate;
+
+ /**
+ * Value used for projective divide.
+ *
+ * If there is no projective divide (the common case), this will be
+ * \c NULL. Optimization passes should check for this to point to a constant
+ * of 1.0 and replace that with \c NULL.
+ */
+ ir_rvalue *projector;
+
+ /**
+ * Coordinate used for comparison on shadow look-ups.
+ *
+ * If there is no shadow comparison, this will be \c NULL. For the
+ * \c ir_txf opcode, this *must* be \c NULL.
+ */
+ ir_rvalue *shadow_comparitor;
+
+ /** Explicit texel offsets. */
+ signed char offsets[3];
+
+ union {
+ ir_rvalue *lod; /**< Floating point LOD */
+ ir_rvalue *bias; /**< Floating point LOD bias */
+ struct {
+ ir_rvalue *dPdx; /**< Partial derivative of coordinate wrt X */
+ ir_rvalue *dPdy; /**< Partial derivative of coordinate wrt Y */
+ } grad;
+ } lod_info;
+};
+
+
struct ir_swizzle_mask {
unsigned x:2;
unsigned y:2;
public:
ir_swizzle(ir_rvalue *, unsigned x, unsigned y, unsigned z, unsigned w,
unsigned count);
- ir_swizzle(ir_rvalue *val, ir_swizzle_mask mask)
- : val(val), mask(mask)
+ ir_swizzle(ir_rvalue *val, ir_swizzle_mask mask);
+
+ virtual ir_swizzle *as_swizzle()
{
- /* empty */
+ return this;
}
ir_swizzle *clone()
v->visit(this);
}
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
bool is_lvalue()
{
return val->is_lvalue() && !mask.has_duplicates;
}
+ /**
+ * Get the variable that is ultimately referenced by an r-value
+ */
+ virtual ir_variable *variable_referenced();
+
ir_rvalue *val;
ir_swizzle_mask mask;
};
class ir_dereference : public ir_rvalue {
public:
- ir_dereference(struct ir_instruction *);
+ virtual ir_dereference *as_dereference()
+ {
+ return this;
+ }
- ir_dereference(ir_instruction *variable, ir_rvalue *array_index);
+ bool is_lvalue();
- virtual ir_dereference *as_dereference()
+ /**
+ * Get the variable that is ultimately referenced by an r-value
+ */
+ virtual ir_variable *variable_referenced() = 0;
+};
+
+
+class ir_dereference_variable : public ir_dereference {
+public:
+ ir_dereference_variable(ir_variable *var);
+
+ /**
+ * Get the variable that is ultimately referenced by an r-value
+ */
+ virtual ir_variable *variable_referenced()
+ {
+ return this->var;
+ }
+
+ virtual ir_variable *whole_variable_referenced()
+ {
+ /* ir_dereference_variable objects always dereference the entire
+ * variable. However, if this dereference is dereferenced by anything
+ * else, the complete deferefernce chain is not a whole-variable
+ * dereference. This method should only be called on the top most
+ * ir_rvalue in a dereference chain.
+ */
+ return this->var;
+ }
+
+ virtual void accept(ir_visitor *v)
+ {
+ v->visit(this);
+ }
+
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
+ /**
+ * Object being dereferenced.
+ */
+ ir_variable *var;
+};
+
+
+class ir_dereference_array : public ir_dereference {
+public:
+ ir_dereference_array(ir_rvalue *value, ir_rvalue *array_index);
+
+ ir_dereference_array(ir_variable *var, ir_rvalue *array_index);
+
+ virtual ir_dereference_array *as_dereference_array()
{
return this;
}
+ /**
+ * Get the variable that is ultimately referenced by an r-value
+ */
+ virtual ir_variable *variable_referenced()
+ {
+ return this->array->variable_referenced();
+ }
+
virtual void accept(ir_visitor *v)
{
v->visit(this);
}
- bool is_lvalue();
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
+ ir_rvalue *array;
+ ir_rvalue *array_index;
+
+private:
+ void set_array(ir_rvalue *value);
+};
+
+
+class ir_dereference_record : public ir_dereference {
+public:
+ ir_dereference_record(ir_rvalue *value, const char *field);
- enum {
- ir_reference_variable,
- ir_reference_array,
- ir_reference_record
- } mode;
+ ir_dereference_record(ir_variable *var, const char *field);
/**
- * Object being dereferenced.
- *
- * Must be either an \c ir_variable or an \c ir_rvalue.
+ * Get the variable that is ultimately referenced by an r-value
*/
- ir_instruction *var;
+ virtual ir_variable *variable_referenced()
+ {
+ return this->record->variable_referenced();
+ }
- union {
- ir_rvalue *array_index;
- const char *field;
- } selector;
+ virtual void accept(ir_visitor *v)
+ {
+ v->visit(this);
+ }
+
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
+ ir_rvalue *record;
+ const char *field;
+};
+
+
+/**
+ * Data stored in an ir_constant
+ */
+union ir_constant_data {
+ unsigned u[16];
+ int i[16];
+ float f[16];
+ bool b[16];
};
class ir_constant : public ir_rvalue {
public:
- ir_constant(const struct glsl_type *type, const void *data);
+ ir_constant(const struct glsl_type *type, const ir_constant_data *data);
ir_constant(bool b);
ir_constant(unsigned int u);
ir_constant(int i);
ir_constant(float f);
- virtual void accept(ir_visitor *v)
+ /**
+ * Construct an ir_constant from a list of ir_constant values
+ */
+ ir_constant(const struct glsl_type *type, exec_list *values);
+
+ /**
+ * Construct an ir_constant from a scalar component of another ir_constant
+ *
+ * The new \c ir_constant inherits the type of the component from the
+ * source constant.
+ *
+ * \note
+ * In the case of a matrix constant, the new constant is a scalar, \b not
+ * a vector.
+ */
+ ir_constant(const ir_constant *c, unsigned i);
+
+ virtual ir_constant *as_constant()
{
- v->visit(this);
+ return this;
}
- ir_constant *clone()
+ virtual void accept(ir_visitor *v)
{
- return new ir_constant(this->type, &this->value);
+ v->visit(this);
}
+ virtual ir_visitor_status accept(ir_hierarchical_visitor *);
+
+ ir_constant *clone();
+
+ /**
+ * Get a particular component of a constant as a specific type
+ *
+ * This is useful, for example, to get a value from an integer constant
+ * as a float or bool. This appears frequently when constructors are
+ * called with all constant parameters.
+ */
+ /*@{*/
+ bool get_bool_component(unsigned i) const;
+ float get_float_component(unsigned i) const;
+ int get_int_component(unsigned i) const;
+ unsigned get_uint_component(unsigned i) const;
+ /*@}*/
+
+ ir_constant *get_record_field(const char *name);
+
+ /**
+ * Determine whether a constant has the same value as another constant
+ */
+ bool has_value(const ir_constant *) const;
+
/**
* Value of the constant.
*
* by the type associated with the \c ir_instruction. Constants may be
* scalars, vectors, or matrices.
*/
- union {
- unsigned u[16];
- int i[16];
- float f[16];
- bool b[16];
- } value;
+ union ir_constant_data value;
+
+ exec_list components;
+
+private:
+ /**
+ * Parameterless constructor only used by the clone method
+ */
+ ir_constant(void);
};
void
visit_exec_list(exec_list *list, ir_visitor *visitor);
+void validate_ir_tree(exec_list *instructions);
+
extern void
_mesa_glsl_initialize_variables(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
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