Revision control
Copy as Markdown
Other Tools
/* -*- c++ -*- */
/*
* Copyright © 2009 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef AST_H
#define AST_H
#include "list.h"
#include "glsl_parser_extras.h"
#include "compiler/glsl_types.h"
#include "util/bitset.h"
struct _mesa_glsl_parse_state;
struct YYLTYPE;
/**
* \defgroup AST Abstract syntax tree node definitions
*
* An abstract syntax tree is generated by the parser. This is a fairly
* direct representation of the gramma derivation for the source program.
* No symantic checking is done during the generation of the AST. Only
* syntactic checking is done. Symantic checking is performed by a later
* stage that converts the AST to a more generic intermediate representation.
*
*@{
*/
/**
* Base class of all abstract syntax tree nodes
*/
class ast_node {
public:
DECLARE_LINEAR_ZALLOC_CXX_OPERATORS(ast_node);
/**
* Print an AST node in something approximating the original GLSL code
*/
virtual void print(void) const;
/**
* Convert the AST node to the high-level intermediate representation
*/
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
virtual bool has_sequence_subexpression() const;
/**
* Retrieve the source location of an AST node
*
* This function is primarily used to get the source position of an AST node
* into a form that can be passed to \c _mesa_glsl_error.
*
* \sa _mesa_glsl_error, ast_node::set_location
*/
struct YYLTYPE get_location(void) const
{
struct YYLTYPE locp;
locp.path = this->location.path;
locp.source = this->location.source;
locp.first_line = this->location.first_line;
locp.first_column = this->location.first_column;
locp.last_line = this->location.last_line;
locp.last_column = this->location.last_column;
return locp;
}
/**
* Set the source location of an AST node from a parser location
*
* \sa ast_node::get_location
*/
void set_location(const struct YYLTYPE &locp)
{
this->location.path = locp.path;
this->location.source = locp.source;
this->location.first_line = locp.first_line;
this->location.first_column = locp.first_column;
this->location.last_line = locp.last_line;
this->location.last_column = locp.last_column;
}
/**
* Set the source location range of an AST node using two location nodes
*
* \sa ast_node::set_location
*/
void set_location_range(const struct YYLTYPE &begin, const struct YYLTYPE &end)
{
this->location.path = begin.path;
this->location.source = begin.source;
this->location.first_line = begin.first_line;
this->location.last_line = end.last_line;
this->location.first_column = begin.first_column;
this->location.last_column = end.last_column;
}
/**
* Source location of the AST node.
*/
struct {
char *path; /**< GLSL shader include path. */
unsigned source; /**< GLSL source number. */
unsigned first_line; /**< First line number within the source string. */
unsigned first_column; /**< First column in the first line. */
unsigned last_line; /**< Last line number within the source string. */
unsigned last_column; /**< Last column in the last line. */
} location;
exec_node link;
virtual void set_is_lhs(bool);
protected:
/**
* The only constructor is protected so that only derived class objects can
* be created.
*/
ast_node(void);
};
/**
* Operators for AST expression nodes.
*/
enum ast_operators {
ast_assign,
ast_plus, /**< Unary + operator. */
ast_neg,
ast_add,
ast_sub,
ast_mul,
ast_div,
ast_mod,
ast_lshift,
ast_rshift,
ast_less,
ast_greater,
ast_lequal,
ast_gequal,
ast_equal,
ast_nequal,
ast_bit_and,
ast_bit_xor,
ast_bit_or,
ast_bit_not,
ast_logic_and,
ast_logic_xor,
ast_logic_or,
ast_logic_not,
ast_mul_assign,
ast_div_assign,
ast_mod_assign,
ast_add_assign,
ast_sub_assign,
ast_ls_assign,
ast_rs_assign,
ast_and_assign,
ast_xor_assign,
ast_or_assign,
ast_conditional,
ast_pre_inc,
ast_pre_dec,
ast_post_inc,
ast_post_dec,
ast_field_selection,
ast_array_index,
ast_unsized_array_dim,
ast_function_call,
ast_identifier,
ast_int_constant,
ast_uint_constant,
ast_float_constant,
ast_bool_constant,
ast_double_constant,
ast_int64_constant,
ast_uint64_constant,
ast_sequence,
ast_aggregate
/**
* Number of possible operators for an ast_expression
*
* This is done as a define instead of as an additional value in the enum so
* that the compiler won't generate spurious messages like "warning:
* enumeration value ‘ast_num_operators’ not handled in switch"
*/
#define AST_NUM_OPERATORS (ast_aggregate + 1)
};
/**
* Representation of any sort of expression.
*/
class ast_expression : public ast_node {
public:
ast_expression(int oper, ast_expression *,
ast_expression *, ast_expression *);
ast_expression(const char *identifier) :
oper(ast_identifier)
{
subexpressions[0] = NULL;
subexpressions[1] = NULL;
subexpressions[2] = NULL;
primary_expression.identifier = identifier;
this->non_lvalue_description = NULL;
this->is_lhs = false;
}
static const char *operator_string(enum ast_operators op);
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
virtual void hir_no_rvalue(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
virtual bool has_sequence_subexpression() const;
ir_rvalue *do_hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state,
bool needs_rvalue);
virtual void print(void) const;
enum ast_operators oper;
ast_expression *subexpressions[3];
union {
const char *identifier;
int int_constant;
float float_constant;
unsigned uint_constant;
int bool_constant;
double double_constant;
uint64_t uint64_constant;
int64_t int64_constant;
} primary_expression;
/**
* List of expressions for an \c ast_sequence or parameters for an
* \c ast_function_call
*/
exec_list expressions;
/**
* For things that can't be l-values, this describes what it is.
*
* This text is used by the code that generates IR for assignments to
* detect and emit useful messages for assignments to some things that
* can't be l-values. For example, pre- or post-incerement expressions.
*
* \note
* This pointer may be \c NULL.
*/
const char *non_lvalue_description;
void set_is_lhs(bool new_value);
private:
bool is_lhs;
};
class ast_expression_bin : public ast_expression {
public:
ast_expression_bin(int oper, ast_expression *, ast_expression *);
virtual void print(void) const;
};
/**
* Subclass of expressions for function calls
*/
class ast_function_expression : public ast_expression {
public:
ast_function_expression(ast_expression *callee)
: ast_expression(ast_function_call, callee,
NULL, NULL),
cons(false)
{
/* empty */
}
ast_function_expression(class ast_type_specifier *type)
: ast_expression(ast_function_call, (ast_expression *) type,
NULL, NULL),
cons(true)
{
/* empty */
}
bool is_constructor() const
{
return cons;
}
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
virtual void hir_no_rvalue(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
virtual bool has_sequence_subexpression() const;
private:
/**
* Is this function call actually a constructor?
*/
bool cons;
ir_rvalue *
handle_method(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
};
class ast_subroutine_list : public ast_node
{
public:
virtual void print(void) const;
exec_list declarations;
};
class ast_array_specifier : public ast_node {
public:
ast_array_specifier(const struct YYLTYPE &locp, ast_expression *dim)
{
set_location(locp);
array_dimensions.push_tail(&dim->link);
}
void add_dimension(ast_expression *dim)
{
array_dimensions.push_tail(&dim->link);
}
bool is_single_dimension() const
{
return this->array_dimensions.get_tail_raw()->prev != NULL &&
this->array_dimensions.get_tail_raw()->prev->is_head_sentinel();
}
virtual void print(void) const;
/* This list contains objects of type ast_node containing the
* array dimensions in outermost-to-innermost order.
*/
exec_list array_dimensions;
};
class ast_layout_expression : public ast_node {
public:
ast_layout_expression(const struct YYLTYPE &locp, ast_expression *expr)
{
set_location(locp);
layout_const_expressions.push_tail(&expr->link);
}
bool process_qualifier_constant(struct _mesa_glsl_parse_state *state,
const char *qual_indentifier,
unsigned *value, bool can_be_zero);
void merge_qualifier(ast_layout_expression *l_expr)
{
layout_const_expressions.append_list(&l_expr->layout_const_expressions);
}
exec_list layout_const_expressions;
};
/**
* C-style aggregate initialization class
*
* Represents C-style initializers of vectors, matrices, arrays, and
* structures. E.g., vec3 pos = {1.0, 0.0, -1.0} is equivalent to
* vec3 pos = vec3(1.0, 0.0, -1.0).
*
* Specified in GLSL 4.20 and GL_ARB_shading_language_420pack.
*
* \sa _mesa_ast_set_aggregate_type
*/
class ast_aggregate_initializer : public ast_expression {
public:
ast_aggregate_initializer()
: ast_expression(ast_aggregate, NULL, NULL, NULL),
constructor_type(NULL)
{
/* empty */
}
/**
* glsl_type of the aggregate, which is inferred from the LHS of whatever
* the aggregate is being used to initialize. This can't be inferred at
* parse time (since the parser deals with ast_type_specifiers, not
* glsl_types), so the parser leaves it NULL. However, the ast-to-hir
* conversion code makes sure to fill it in with the appropriate type
* before hir() is called.
*/
const glsl_type *constructor_type;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
virtual void hir_no_rvalue(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
};
class ast_compound_statement : public ast_node {
public:
ast_compound_statement(int new_scope, ast_node *statements);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
int new_scope;
exec_list statements;
};
class ast_declaration : public ast_node {
public:
ast_declaration(const char *identifier,
ast_array_specifier *array_specifier,
ast_expression *initializer);
virtual void print(void) const;
const char *identifier;
ast_array_specifier *array_specifier;
ast_expression *initializer;
};
enum {
ast_precision_none = 0, /**< Absence of precision qualifier. */
ast_precision_high,
ast_precision_medium,
ast_precision_low
};
enum {
ast_depth_none = 0, /**< Absence of depth qualifier. */
ast_depth_any,
ast_depth_greater,
ast_depth_less,
ast_depth_unchanged
};
struct ast_type_qualifier {
DECLARE_RALLOC_CXX_OPERATORS(ast_type_qualifier);
/* Note: this bitset needs to have at least as many bits as the 'q'
* struct has flags, below. Previously, the size was 128 instead of 96.
* But an apparent bug in GCC 5.4.0 causes bad SSE code generation
* elsewhere, leading to a crash. 96 bits works around the issue.
*/
DECLARE_BITSET_T(bitset_t, 96);
union flags {
struct {
unsigned invariant:1;
unsigned precise:1;
unsigned constant:1;
unsigned attribute:1;
unsigned varying:1;
unsigned in:1;
unsigned out:1;
unsigned centroid:1;
unsigned sample:1;
unsigned patch:1;
unsigned uniform:1;
unsigned buffer:1;
unsigned shared_storage:1;
unsigned smooth:1;
unsigned flat:1;
unsigned noperspective:1;
/** \name Layout qualifiers for GL_ARB_fragment_coord_conventions */
/*@{*/
unsigned origin_upper_left:1;
unsigned pixel_center_integer:1;
/*@}*/
/**
* Flag set if GL_ARB_enhanced_layouts "align" layout qualifier is
* used.
*/
unsigned explicit_align:1;
/**
* Flag set if GL_ARB_explicit_attrib_location "location" layout
* qualifier is used.
*/
unsigned explicit_location:1;
/**
* Flag set if GL_ARB_explicit_attrib_location "index" layout
* qualifier is used.
*/
unsigned explicit_index:1;
/**
* Flag set if GL_ARB_enhanced_layouts "component" layout
* qualifier is used.
*/
unsigned explicit_component:1;
/**
* Flag set if GL_ARB_shading_language_420pack "binding" layout
* qualifier is used.
*/
unsigned explicit_binding:1;
/**
* Flag set if GL_ARB_shader_atomic counter "offset" layout
* qualifier is used.
*/
unsigned explicit_offset:1;
/** \name Layout qualifiers for GL_AMD_conservative_depth */
/** \{ */
unsigned depth_type:1;
/** \} */
/** \name Layout qualifiers for GL_ARB_uniform_buffer_object */
/** \{ */
unsigned std140:1;
unsigned std430:1;
unsigned shared:1;
unsigned packed:1;
unsigned column_major:1;
unsigned row_major:1;
/** \} */
/** \name Layout qualifiers for GLSL 1.50 geometry shaders */
/** \{ */
unsigned prim_type:1;
unsigned max_vertices:1;
/** \} */
/**
* local_size_{x,y,z} flags for compute shaders. Bit 0 represents
* local_size_x, and so on.
*/
unsigned local_size:3;
/** \name Layout qualifiers for ARB_compute_variable_group_size. */
/** \{ */
unsigned local_size_variable:1;
/** \} */
/** \name Layout and memory qualifiers for ARB_shader_image_load_store. */
/** \{ */
unsigned early_fragment_tests:1;
unsigned explicit_image_format:1;
unsigned coherent:1;
unsigned _volatile:1;
unsigned restrict_flag:1;
unsigned read_only:1; /**< "readonly" qualifier. */
unsigned write_only:1; /**< "writeonly" qualifier. */
/** \} */
/** \name Layout qualifiers for GL_ARB_gpu_shader5 */
/** \{ */
unsigned invocations:1;
unsigned stream:1; /**< Has stream value assigned */
unsigned explicit_stream:1; /**< stream value assigned explicitly by shader code */
/** \} */
/** \name Layout qualifiers for GL_ARB_enhanced_layouts */
/** \{ */
unsigned explicit_xfb_offset:1; /**< xfb_offset value assigned explicitly by shader code */
unsigned xfb_buffer:1; /**< Has xfb_buffer value assigned */
unsigned explicit_xfb_buffer:1; /**< xfb_buffer value assigned explicitly by shader code */
unsigned xfb_stride:1; /**< Is xfb_stride value yet to be merged with global values */
unsigned explicit_xfb_stride:1; /**< xfb_stride value assigned explicitly by shader code */
/** \} */
/** \name Layout qualifiers for GL_ARB_tessellation_shader */
/** \{ */
/* tess eval input layout */
/* gs prim_type reused for primitive mode */
unsigned vertex_spacing:1;
unsigned ordering:1;
unsigned point_mode:1;
/* tess control output layout */
unsigned vertices:1;
/** \} */
/** \name Qualifiers for GL_ARB_shader_subroutine */
/** \{ */
unsigned subroutine:1; /**< Is this marked 'subroutine' */
/** \} */
/** \name Qualifiers for GL_KHR_blend_equation_advanced */
/** \{ */
unsigned blend_support:1; /**< Are there any blend_support_ qualifiers */
/** \} */
/**
* Flag set if GL_ARB_post_depth_coverage layout qualifier is used.
*/
unsigned post_depth_coverage:1;
/**
* Flags for the layout qualifers added by ARB_fragment_shader_interlock
*/
unsigned pixel_interlock_ordered:1;
unsigned pixel_interlock_unordered:1;
unsigned sample_interlock_ordered:1;
unsigned sample_interlock_unordered:1;
/**
* Flag set if GL_INTEL_conservartive_rasterization layout qualifier
* is used.
*/
unsigned inner_coverage:1;
/** \name Layout qualifiers for GL_ARB_bindless_texture */
/** \{ */
unsigned bindless_sampler:1;
unsigned bindless_image:1;
unsigned bound_sampler:1;
unsigned bound_image:1;
/** \} */
/** \name Layout qualifiers for GL_EXT_shader_framebuffer_fetch_non_coherent */
/** \{ */
unsigned non_coherent:1;
/** \} */
/** \name Layout qualifiers for NV_compute_shader_derivatives */
/** \{ */
unsigned derivative_group:1;
/** \} */
/**
* Flag set if GL_NV_viewport_array2 viewport_relative layout
* qualifier is used.
*/
unsigned viewport_relative:1;
}
/** \brief Set of flags, accessed by name. */
q;
/** \brief Set of flags, accessed as a bitmask. */
bitset_t i;
} flags;
/** Precision of the type (highp/medium/lowp). */
unsigned precision:2;
/** Type of layout qualifiers for GL_AMD_conservative_depth. */
unsigned depth_type:3;
/**
* Alignment specified via GL_ARB_enhanced_layouts "align" layout qualifier
*/
ast_expression *align;
/** Geometry shader invocations for GL_ARB_gpu_shader5. */
ast_layout_expression *invocations;
/**
* Location specified via GL_ARB_explicit_attrib_location layout
*
* \note
* This field is only valid if \c explicit_location is set.
*/
ast_expression *location;
/**
* Index specified via GL_ARB_explicit_attrib_location layout
*
* \note
* This field is only valid if \c explicit_index is set.
*/
ast_expression *index;
/**
* Component specified via GL_ARB_enhaced_layouts
*
* \note
* This field is only valid if \c explicit_component is set.
*/
ast_expression *component;
/** Maximum output vertices in GLSL 1.50 geometry shaders. */
ast_layout_expression *max_vertices;
/** Stream in GLSL 1.50 geometry shaders. */
ast_expression *stream;
/** xfb_buffer specified via the GL_ARB_enhanced_layouts keyword. */
ast_expression *xfb_buffer;
/** xfb_stride specified via the GL_ARB_enhanced_layouts keyword. */
ast_expression *xfb_stride;
/** global xfb_stride values for each buffer */
ast_layout_expression *out_xfb_stride[MAX_FEEDBACK_BUFFERS];
/**
* Input or output primitive type in GLSL 1.50 geometry shaders
* and tessellation shaders.
*/
GLenum prim_type;
/**
* Binding specified via GL_ARB_shading_language_420pack's "binding" keyword.
*
* \note
* This field is only valid if \c explicit_binding is set.
*/
ast_expression *binding;
/**
* Offset specified via GL_ARB_shader_atomic_counter's or
* GL_ARB_enhanced_layouts "offset" keyword, or by GL_ARB_enhanced_layouts
* "xfb_offset" keyword.
*
* \note
* This field is only valid if \c explicit_offset is set.
*/
ast_expression *offset;
/**
* Local size specified via GL_ARB_compute_shader's "local_size_{x,y,z}"
* layout qualifier. Element i of this array is only valid if
* flags.q.local_size & (1 << i) is set.
*/
ast_layout_expression *local_size[3];
/** Tessellation evaluation shader: vertex spacing (equal, fractional even/odd) */
enum gl_tess_spacing vertex_spacing;
/** Tessellation evaluation shader: vertex ordering (CW or CCW) */
GLenum ordering;
/** Tessellation evaluation shader: point mode */
bool point_mode;
/** Tessellation control shader: number of output vertices */
ast_layout_expression *vertices;
/**
* Image format specified with an ARB_shader_image_load_store
* layout qualifier.
*
* \note
* This field is only valid if \c explicit_image_format is set.
*/
enum pipe_format image_format;
/**
* Arrangement of invocations used to calculate derivatives in a compute
* shader. From NV_compute_shader_derivatives.
*/
enum gl_derivative_group derivative_group;
/**
* Base type of the data read from or written to this image. Only
* the following enumerants are allowed: GLSL_TYPE_UINT,
* GLSL_TYPE_INT, GLSL_TYPE_FLOAT.
*
* \note
* This field is only valid if \c explicit_image_format is set.
*/
glsl_base_type image_base_type;
/**
* Return true if and only if an interpolation qualifier is present.
*/
bool has_interpolation() const;
/**
* Return whether a layout qualifier is present.
*/
bool has_layout() const;
/**
* Return whether a storage qualifier is present.
*/
bool has_storage() const;
/**
* Return whether an auxiliary storage qualifier is present.
*/
bool has_auxiliary_storage() const;
/**
* Return true if and only if a memory qualifier is present.
*/
bool has_memory() const;
/**
* Return true if the qualifier is a subroutine declaration.
*/
bool is_subroutine_decl() const;
bool merge_qualifier(YYLTYPE *loc,
_mesa_glsl_parse_state *state,
const ast_type_qualifier &q,
bool is_single_layout_merge,
bool is_multiple_layouts_merge = false);
/**
* Validate current qualifier against the global out one.
*/
bool validate_out_qualifier(YYLTYPE *loc,
_mesa_glsl_parse_state *state);
/**
* Merge current qualifier into the global out one.
*/
bool merge_into_out_qualifier(YYLTYPE *loc,
_mesa_glsl_parse_state *state,
ast_node* &node);
/**
* Validate current qualifier against the global in one.
*/
bool validate_in_qualifier(YYLTYPE *loc,
_mesa_glsl_parse_state *state);
/**
* Merge current qualifier into the global in one.
*/
bool merge_into_in_qualifier(YYLTYPE *loc,
_mesa_glsl_parse_state *state,
ast_node* &node);
/**
* Push pending layout qualifiers to the global values.
*/
bool push_to_global(YYLTYPE *loc,
_mesa_glsl_parse_state *state);
bool validate_flags(YYLTYPE *loc,
_mesa_glsl_parse_state *state,
const ast_type_qualifier &allowed_flags,
const char *message, const char *name);
ast_subroutine_list *subroutine_list;
};
class ast_declarator_list;
class ast_struct_specifier : public ast_node {
public:
ast_struct_specifier(const char *identifier,
ast_declarator_list *declarator_list);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
const char *name;
ast_type_qualifier *layout;
/* List of ast_declarator_list * */
exec_list declarations;
bool is_declaration;
const glsl_type *type;
};
class ast_type_specifier : public ast_node {
public:
/** Construct a type specifier from a type name */
ast_type_specifier(const char *name)
: type(NULL), type_name(name), structure(NULL), array_specifier(NULL),
default_precision(ast_precision_none)
{
/* empty */
}
/** Construct a type specifier from a structure definition */
ast_type_specifier(ast_struct_specifier *s)
: type(NULL), type_name(s->name), structure(s), array_specifier(NULL),
default_precision(ast_precision_none)
{
/* empty */
}
ast_type_specifier(const glsl_type *t)
: type(t), type_name(t->name), structure(NULL), array_specifier(NULL),
default_precision(ast_precision_none)
{
/* empty */
}
const struct glsl_type *glsl_type(const char **name,
struct _mesa_glsl_parse_state *state)
const;
virtual void print(void) const;
ir_rvalue *hir(exec_list *, struct _mesa_glsl_parse_state *);
const struct glsl_type *type;
const char *type_name;
ast_struct_specifier *structure;
ast_array_specifier *array_specifier;
/** For precision statements, this is the given precision; otherwise none. */
unsigned default_precision:2;
};
class ast_fully_specified_type : public ast_node {
public:
virtual void print(void) const;
bool has_qualifiers(_mesa_glsl_parse_state *state) const;
ast_fully_specified_type() : qualifier(), specifier(NULL)
{
}
const struct glsl_type *glsl_type(const char **name,
struct _mesa_glsl_parse_state *state)
const;
ast_type_qualifier qualifier;
ast_type_specifier *specifier;
};
class ast_declarator_list : public ast_node {
public:
ast_declarator_list(ast_fully_specified_type *);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
ast_fully_specified_type *type;
/** List of 'ast_declaration *' */
exec_list declarations;
/**
* Flags for redeclarations. In these cases, no type is specified, to
* `type` is allowed to be NULL. In all other cases, this would be an error.
*/
int invariant; /** < `invariant` redeclaration */
int precise; /** < `precise` redeclaration */
};
class ast_parameter_declarator : public ast_node {
public:
ast_parameter_declarator() :
type(NULL),
identifier(NULL),
array_specifier(NULL),
formal_parameter(false),
is_void(false)
{
/* empty */
}
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
ast_fully_specified_type *type;
const char *identifier;
ast_array_specifier *array_specifier;
static void parameters_to_hir(exec_list *ast_parameters,
bool formal, exec_list *ir_parameters,
struct _mesa_glsl_parse_state *state);
private:
/** Is this parameter declaration part of a formal parameter list? */
bool formal_parameter;
/**
* Is this parameter 'void' type?
*
* This field is set by \c ::hir.
*/
bool is_void;
};
class ast_function : public ast_node {
public:
ast_function(void);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
ast_fully_specified_type *return_type;
const char *identifier;
exec_list parameters;
private:
/**
* Is this prototype part of the function definition?
*
* Used by ast_function_definition::hir to process the parameters, etc.
* of the function.
*
* \sa ::hir
*/
bool is_definition;
/**
* Function signature corresponding to this function prototype instance
*
* Used by ast_function_definition::hir to process the parameters, etc.
* of the function.
*
* \sa ::hir
*/
class ir_function_signature *signature;
friend class ast_function_definition;
};
class ast_expression_statement : public ast_node {
public:
ast_expression_statement(ast_expression *);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
ast_expression *expression;
};
class ast_case_label : public ast_node {
public:
ast_case_label(ast_expression *test_value);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
/**
* An test value of NULL means 'default'.
*/
ast_expression *test_value;
};
class ast_case_label_list : public ast_node {
public:
ast_case_label_list(void);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
/**
* A list of case labels.
*/
exec_list labels;
};
class ast_case_statement : public ast_node {
public:
ast_case_statement(ast_case_label_list *labels);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
ast_case_label_list *labels;
/**
* A list of statements.
*/
exec_list stmts;
};
class ast_case_statement_list : public ast_node {
public:
ast_case_statement_list(void);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
/**
* A list of cases.
*/
exec_list cases;
};
class ast_switch_body : public ast_node {
public:
ast_switch_body(ast_case_statement_list *stmts);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
ast_case_statement_list *stmts;
};
class ast_selection_statement : public ast_node {
public:
ast_selection_statement(ast_expression *condition,
ast_node *then_statement,
ast_node *else_statement);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
ast_expression *condition;
ast_node *then_statement;
ast_node *else_statement;
};
class ast_switch_statement : public ast_node {
public:
ast_switch_statement(ast_expression *test_expression,
ast_node *body);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
ast_expression *test_expression;
ast_node *body;
protected:
void test_to_hir(exec_list *, struct _mesa_glsl_parse_state *);
};
class ast_iteration_statement : public ast_node {
public:
ast_iteration_statement(int mode, ast_node *init, ast_node *condition,
ast_expression *rest_expression, ast_node *body);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *, struct _mesa_glsl_parse_state *);
enum ast_iteration_modes {
ast_for,
ast_while,
ast_do_while
} mode;
ast_node *init_statement;
ast_node *condition;
ast_expression *rest_expression;
ast_node *body;
/**
* Generate IR from the condition of a loop
*
* This is factored out of ::hir because some loops have the condition
* test at the top (for and while), and others have it at the end (do-while).
*/
void condition_to_hir(exec_list *, struct _mesa_glsl_parse_state *);
};
class ast_jump_statement : public ast_node {
public:
ast_jump_statement(int mode, ast_expression *return_value);
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
enum ast_jump_modes {
ast_continue,
ast_break,
ast_return,
ast_discard
} mode;
ast_expression *opt_return_value;
};
class ast_demote_statement : public ast_node {
public:
ast_demote_statement(void) {}
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
};
class ast_function_definition : public ast_node {
public:
ast_function_definition() : prototype(NULL), body(NULL)
{
}
virtual void print(void) const;
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
ast_function *prototype;
ast_compound_statement *body;
};
class ast_interface_block : public ast_node {
public:
ast_interface_block(const char *instance_name,
ast_array_specifier *array_specifier)
: block_name(NULL), instance_name(instance_name),
array_specifier(array_specifier)
{
}
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
ast_type_qualifier default_layout;
ast_type_qualifier layout;
const char *block_name;
/**
* Declared name of the block instance, if specified.
*
* If the block does not have an instance name, this field will be
* \c NULL.
*/
const char *instance_name;
/** List of ast_declarator_list * */
exec_list declarations;
/**
* Declared array size of the block instance
*
* If the block is not declared as an array or if the block instance array
* is unsized, this field will be \c NULL.
*/
ast_array_specifier *array_specifier;
};
/**
* AST node representing a declaration of the output layout for tessellation
* control shaders.
*/
class ast_tcs_output_layout : public ast_node
{
public:
ast_tcs_output_layout(const struct YYLTYPE &locp)
{
set_location(locp);
}
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
};
/**
* AST node representing a declaration of the input layout for geometry
* shaders.
*/
class ast_gs_input_layout : public ast_node
{
public:
ast_gs_input_layout(const struct YYLTYPE &locp, GLenum prim_type)
: prim_type(prim_type)
{
set_location(locp);
}
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
private:
const GLenum prim_type;
};
/**
* AST node representing a decalaration of the input layout for compute
* shaders.
*/
class ast_cs_input_layout : public ast_node
{
public:
ast_cs_input_layout(const struct YYLTYPE &locp,
ast_layout_expression *const *local_size)
{
for (int i = 0; i < 3; i++) {
this->local_size[i] = local_size[i];
}
set_location(locp);
}
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
private:
ast_layout_expression *local_size[3];
};
class ast_warnings_toggle : public ast_node {
public:
ast_warnings_toggle(bool _enable)
: enable(_enable)
{
/* empty */
}
virtual ir_rvalue *hir(exec_list *instructions,
struct _mesa_glsl_parse_state *state);
private:
bool enable;
};
/*@}*/
extern void
_mesa_ast_to_hir(exec_list *instructions, struct _mesa_glsl_parse_state *state);
extern ir_rvalue *
_mesa_ast_field_selection_to_hir(const ast_expression *expr,
exec_list *instructions,
struct _mesa_glsl_parse_state *state);
extern ir_rvalue *
_mesa_ast_array_index_to_hir(void *mem_ctx,
struct _mesa_glsl_parse_state *state,
ir_rvalue *array, ir_rvalue *idx,
YYLTYPE &loc, YYLTYPE &idx_loc);
extern void
_mesa_ast_set_aggregate_type(const glsl_type *type,
ast_expression *expr);
void
emit_function(_mesa_glsl_parse_state *state, ir_function *f);
extern void
check_builtin_array_max_size(const char *name, unsigned size,
YYLTYPE loc, struct _mesa_glsl_parse_state *state);
extern void _mesa_ast_process_interface_block(YYLTYPE *locp,
_mesa_glsl_parse_state *state,
ast_interface_block *const block,
const struct ast_type_qualifier &q);
extern bool
process_qualifier_constant(struct _mesa_glsl_parse_state *state,
YYLTYPE *loc,
const char *qual_indentifier,
ast_expression *const_expression,
unsigned *value);
#endif /* AST_H */