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|
/*
* Copyright © 2014 Connor Abbott
*
* 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.
*
* Authors:
* Connor Abbott (cwabbott0@gmail.com)
*
*/
#pragma once
#include "util/hash_table.h"
#include "main/set.h"
#include "../list.h"
#include "GL/gl.h" /* GLenum */
#include "util/ralloc.h"
#include "nir_types.h"
#include <stdio.h>
#ifdef __cplusplus
extern "C" {
#endif
struct nir_function_overload;
struct nir_function;
/**
* Description of built-in state associated with a uniform
*
* \sa nir_variable::state_slots
*/
typedef struct {
int tokens[5];
int swizzle;
} nir_state_slot;
typedef enum {
nir_var_shader_in,
nir_var_shader_out,
nir_var_global,
nir_var_local,
nir_var_uniform,
nir_var_system_value
} nir_variable_mode;
/**
* Data stored in an nir_constant
*/
union nir_constant_data {
unsigned u[16];
int i[16];
float f[16];
bool b[16];
};
typedef struct nir_constant {
/**
* Value of the constant.
*
* The field used to back the values supplied by the constant is determined
* by the type associated with the \c ir_instruction. Constants may be
* scalars, vectors, or matrices.
*/
union nir_constant_data value;
/* Array elements / Structure Fields */
struct nir_constant **elements;
} nir_constant;
/**
* \brief Layout qualifiers for gl_FragDepth.
*
* The AMD/ARB_conservative_depth extensions allow gl_FragDepth to be redeclared
* with a layout qualifier.
*/
typedef enum {
nir_depth_layout_none, /**< No depth layout is specified. */
nir_depth_layout_any,
nir_depth_layout_greater,
nir_depth_layout_less,
nir_depth_layout_unchanged
} nir_depth_layout;
/**
* Either a uniform, global variable, shader input, or shader output. Based on
* ir_variable - it should be easy to translate between the two.
*/
typedef struct {
struct exec_node node;
/**
* Declared type of the variable
*/
const struct glsl_type *type;
/**
* Declared name of the variable
*/
char *name;
/**
* For variables which satisfy the is_interface_instance() predicate, this
* points to an array of integers such that if the ith member of the
* interface block is an array, max_ifc_array_access[i] is the maximum
* array element of that member that has been accessed. If the ith member
* of the interface block is not an array, max_ifc_array_access[i] is
* unused.
*
* For variables whose type is not an interface block, this pointer is
* NULL.
*/
unsigned *max_ifc_array_access;
struct nir_variable_data {
/**
* Is the variable read-only?
*
* This is set for variables declared as \c const, shader inputs,
* and uniforms.
*/
unsigned read_only:1;
unsigned centroid:1;
unsigned sample:1;
unsigned invariant:1;
/**
* Storage class of the variable.
*
* \sa nir_variable_mode
*/
unsigned mode:4;
/**
* Interpolation mode for shader inputs / outputs
*
* \sa ir_variable_interpolation
*/
unsigned interpolation:2;
/**
* \name ARB_fragment_coord_conventions
* @{
*/
unsigned origin_upper_left:1;
unsigned pixel_center_integer:1;
/*@}*/
/**
* Was the location explicitly set in the shader?
*
* If the location is explicitly set in the shader, it \b cannot be changed
* by the linker or by the API (e.g., calls to \c glBindAttribLocation have
* no effect).
*/
unsigned explicit_location:1;
unsigned explicit_index:1;
/**
* Was an initial binding explicitly set in the shader?
*
* If so, constant_value contains an integer ir_constant representing the
* initial binding point.
*/
unsigned explicit_binding:1;
/**
* Does this variable have an initializer?
*
* This is used by the linker to cross-validiate initializers of global
* variables.
*/
unsigned has_initializer:1;
/**
* Is this variable a generic output or input that has not yet been matched
* up to a variable in another stage of the pipeline?
*
* This is used by the linker as scratch storage while assigning locations
* to generic inputs and outputs.
*/
unsigned is_unmatched_generic_inout:1;
/**
* If non-zero, then this variable may be packed along with other variables
* into a single varying slot, so this offset should be applied when
* accessing components. For example, an offset of 1 means that the x
* component of this variable is actually stored in component y of the
* location specified by \c location.
*/
unsigned location_frac:2;
/**
* Non-zero if this variable was created by lowering a named interface
* block which was not an array.
*
* Note that this variable and \c from_named_ifc_block_array will never
* both be non-zero.
*/
unsigned from_named_ifc_block_nonarray:1;
/**
* Non-zero if this variable was created by lowering a named interface
* block which was an array.
*
* Note that this variable and \c from_named_ifc_block_nonarray will never
* both be non-zero.
*/
unsigned from_named_ifc_block_array:1;
/**
* \brief Layout qualifier for gl_FragDepth.
*
* This is not equal to \c ir_depth_layout_none if and only if this
* variable is \c gl_FragDepth and a layout qualifier is specified.
*/
nir_depth_layout depth_layout;
/**
* Storage location of the base of this variable
*
* The precise meaning of this field depends on the nature of the variable.
*
* - Vertex shader input: one of the values from \c gl_vert_attrib.
* - Vertex shader output: one of the values from \c gl_varying_slot.
* - Geometry shader input: one of the values from \c gl_varying_slot.
* - Geometry shader output: one of the values from \c gl_varying_slot.
* - Fragment shader input: one of the values from \c gl_varying_slot.
* - Fragment shader output: one of the values from \c gl_frag_result.
* - Uniforms: Per-stage uniform slot number for default uniform block.
* - Uniforms: Index within the uniform block definition for UBO members.
* - Other: This field is not currently used.
*
* If the variable is a uniform, shader input, or shader output, and the
* slot has not been assigned, the value will be -1.
*/
int location;
/**
* The actual location of the variable in the IR. Only valid for inputs
* and outputs.
*/
unsigned int driver_location;
/**
* output index for dual source blending.
*/
int index;
/**
* Initial binding point for a sampler or UBO.
*
* For array types, this represents the binding point for the first element.
*/
int binding;
/**
* Location an atomic counter is stored at.
*/
struct {
unsigned buffer_index;
unsigned offset;
} atomic;
/**
* ARB_shader_image_load_store qualifiers.
*/
struct {
bool read_only; /**< "readonly" qualifier. */
bool write_only; /**< "writeonly" qualifier. */
bool coherent;
bool _volatile;
bool restrict_flag;
/** Image internal format if specified explicitly, otherwise GL_NONE. */
GLenum format;
} image;
/**
* Highest element accessed with a constant expression array index
*
* Not used for non-array variables.
*/
unsigned max_array_access;
} data;
/**
* Built-in state that backs this uniform
*
* Once set at variable creation, \c state_slots must remain invariant.
* This is because, ideally, this array would be shared by all clones of
* this variable in the IR tree. In other words, we'd really like for it
* to be a fly-weight.
*
* If the variable is not a uniform, \c num_state_slots will be zero and
* \c state_slots will be \c NULL.
*/
/*@{*/
unsigned num_state_slots; /**< Number of state slots used */
nir_state_slot *state_slots; /**< State descriptors. */
/*@}*/
/**
* Value assigned in the initializer of a variable declared "const"
*/
nir_constant *constant_value;
/**
* Constant expression assigned in the initializer of the variable
*
* \warning
* This field and \c ::constant_value are distinct. Even if the two fields
* refer to constants with the same value, they must point to separate
* objects.
*/
nir_constant *constant_initializer;
/**
* For variables that are in an interface block or are an instance of an
* interface block, this is the \c GLSL_TYPE_INTERFACE type for that block.
*
* \sa ir_variable::location
*/
const struct glsl_type *interface_type;
} nir_variable;
typedef struct {
struct exec_node node;
unsigned num_components; /** < number of vector components */
unsigned num_array_elems; /** < size of array (0 for no array) */
/** for liveness analysis, the index in the bit-array of live variables */
unsigned index;
/** only for debug purposes, can be NULL */
const char *name;
/** whether this register is local (per-function) or global (per-shader) */
bool is_global;
/**
* If this flag is set to true, then accessing channels >= num_components
* is well-defined, and simply spills over to the next array element. This
* is useful for backends that can do per-component accessing, in
* particular scalar backends. By setting this flag and making
* num_components equal to 1, structures can be packed tightly into
* registers and then registers can be accessed per-component to get to
* each structure member, even if it crosses vec4 boundaries.
*/
bool is_packed;
/** set of nir_instr's where this register is used (read from) */
struct set *uses;
/** set of nir_instr's where this register is defined (written to) */
struct set *defs;
/** set of ifs where this register is used as a condition */
struct set *if_uses;
} nir_register;
typedef enum {
nir_instr_type_alu,
nir_instr_type_call,
nir_instr_type_texture,
nir_instr_type_intrinsic,
nir_instr_type_load_const,
nir_instr_type_jump,
nir_instr_type_ssa_undef,
nir_instr_type_phi,
} nir_instr_type;
typedef struct {
struct exec_node node;
nir_instr_type type;
struct nir_block *block;
} nir_instr;
#define nir_instr_next(instr) \
exec_node_data(nir_instr, (instr)->node.next, node)
#define nir_instr_prev(instr) \
exec_node_data(nir_instr, (instr)->node.prev, node)
typedef struct {
/** for debugging only, can be NULL */
const char* name;
/** index into the bit-array for liveness analysis */
unsigned index;
nir_instr *parent_instr;
struct set *uses;
struct set *if_uses;
uint8_t num_components;
} nir_ssa_def;
struct nir_src;
typedef struct {
nir_register *reg;
struct nir_src *indirect; /** < NULL for no indirect offset */
unsigned base_offset;
/* TODO use-def chain goes here */
} nir_reg_src;
typedef struct {
nir_register *reg;
struct nir_src *indirect; /** < NULL for no indirect offset */
unsigned base_offset;
/* TODO def-use chain goes here */
} nir_reg_dest;
typedef struct nir_src {
union {
nir_reg_src reg;
nir_ssa_def *ssa;
};
bool is_ssa;
} nir_src;
typedef struct {
union {
nir_reg_dest reg;
nir_ssa_def ssa;
};
bool is_ssa;
} nir_dest;
nir_src nir_src_copy(nir_src src, void *mem_ctx);
nir_dest nir_dest_copy(nir_dest dest, void *mem_ctx);
typedef struct {
nir_src src;
/**
* \name input modifiers
*/
/*@{*/
/**
* For inputs interpreted as a floating point, flips the sign bit. For inputs
* interpreted as an integer, performs the two's complement negation.
*/
bool negate;
/**
* Clears the sign bit for floating point values, and computes the integer
* absolute value for integers. Note that the negate modifier acts after
* the absolute value modifier, therefore if both are set then all inputs
* will become negative.
*/
bool abs;
/*@}*/
/**
* For each input component, says which component of the register it is
* chosen from. Note that which elements of the swizzle are used and which
* are ignored are based on the write mask for most opcodes - for example,
* a statement like "foo.xzw = bar.zyx" would have a writemask of 1101b and
* a swizzle of {2, x, 1, 0} where x means "don't care."
*/
uint8_t swizzle[4];
} nir_alu_src;
typedef struct {
nir_dest dest;
/**
* \name saturate output modifier
*
* Only valid for opcodes that output floating-point numbers. Clamps the
* output to between 0.0 and 1.0 inclusive.
*/
bool saturate;
unsigned write_mask : 4; /* ignored if dest.is_ssa is true */
} nir_alu_dest;
#define OPCODE(name, num_inputs, per_component, output_size, output_type, \
input_sizes, input_types) \
nir_op_##name,
#define LAST_OPCODE(name) nir_last_opcode = nir_op_##name,
typedef enum {
#include "nir_opcodes.h"
nir_num_opcodes = nir_last_opcode + 1
} nir_op;
#undef OPCODE
#undef LAST_OPCODE
typedef enum {
nir_type_float,
nir_type_int,
nir_type_unsigned,
nir_type_bool
} nir_alu_type;
typedef struct {
const char *name;
unsigned num_inputs;
/**
* If true, the opcode acts in the standard, per-component manner; the
* operation is performed on each component (except the ones that are masked
* out) with the input being taken from the input swizzle for that component.
*
* If false, the size of the output and inputs are explicitly given; swizzle
* and writemask are still in effect, but if the output component is masked
* out, then the input component may still be in use.
*
* The size of some of the inputs may be given (i.e. non-zero) even though
* per_component is false; in that case, each component of the input acts
* per-component, while the rest of the inputs and the output are normal.
* For example, for conditional select the condition is per-component but
* everything else is normal.
*/
bool per_component;
/**
* If per_component is false, the number of components in the output.
*/
unsigned output_size;
/**
* The type of vector that the instruction outputs. Note that this
* determines whether the saturate modifier is allowed.
*/
nir_alu_type output_type;
/**
* If per_component is false, the number of components in each input.
*/
unsigned input_sizes[4];
/**
* The type of vector that each input takes. Note that negate is only
* allowed on inputs with int or float type, and behaves differently on the
* two, and absolute value is only allowed on float type inputs.
*/
nir_alu_type input_types[4];
} nir_op_info;
extern const nir_op_info nir_op_infos[nir_num_opcodes];
typedef struct nir_alu_instr {
nir_instr instr;
nir_op op;
bool has_predicate;
nir_src predicate;
nir_alu_dest dest;
nir_alu_src src[];
} nir_alu_instr;
/* is this source channel used? */
static inline bool
nir_alu_instr_channel_used(nir_alu_instr *instr, unsigned src, unsigned channel)
{
if (nir_op_infos[instr->op].input_sizes[src] > 0)
return channel < nir_op_infos[instr->op].input_sizes[src];
return (instr->dest.write_mask >> channel) & 1;
}
typedef enum {
nir_deref_type_var,
nir_deref_type_array,
nir_deref_type_struct
} nir_deref_type;
typedef struct nir_deref {
nir_deref_type deref_type;
struct nir_deref *child;
const struct glsl_type *type;
} nir_deref;
typedef struct {
nir_deref deref;
nir_variable *var;
} nir_deref_var;
typedef struct {
nir_deref deref;
unsigned base_offset;
bool has_indirect;
nir_src indirect;
} nir_deref_array;
typedef struct {
nir_deref deref;
const char *elem;
} nir_deref_struct;
#define nir_deref_as_var(_deref) exec_node_data(nir_deref_var, _deref, deref)
#define nir_deref_as_array(_deref) \
exec_node_data(nir_deref_array, _deref, deref)
#define nir_deref_as_struct(_deref) \
exec_node_data(nir_deref_struct, _deref, deref)
typedef struct {
nir_instr instr;
unsigned num_params;
nir_deref_var **params;
nir_deref_var *return_deref;
bool has_predicate;
nir_src predicate;
struct nir_function_overload *callee;
} nir_call_instr;
#define INTRINSIC(name, num_srcs, src_components, has_dest, dest_components, \
num_variables, num_indices, flags) \
nir_intrinsic_##name,
#define LAST_INTRINSIC(name) nir_last_intrinsic = nir_intrinsic_##name,
typedef enum {
#include "nir_intrinsics.h"
nir_num_intrinsics = nir_last_intrinsic + 1
} nir_intrinsic_op;
#undef INTRINSIC
#undef LAST_INTRINSIC
typedef struct {
nir_instr instr;
nir_intrinsic_op intrinsic;
nir_dest dest;
int const_index[3];
nir_deref_var *variables[2];
bool has_predicate;
nir_src predicate;
nir_src src[];
} nir_intrinsic_instr;
/**
* \name NIR intrinsics semantic flags
*
* information about what the compiler can do with the intrinsics.
*
* \sa nir_intrinsic_info::flags
*/
/*@{*/
/**
* whether the intrinsic can be safely eliminated if none of its register
* outputs are being used.
*/
#define NIR_INTRINSIC_CAN_ELIMINATE (1 << 0)
/**
* Whether the intrinsic can be reordered with respect to any other intrinsic,
* i.e. whether the only reodering dependencies of the intrinsic are due to the
* register reads/writes.
*/
#define NIR_INTRINSIC_CAN_REORDER (1 << 1)
/*@}*/
#define NIR_INTRINSIC_MAX_INPUTS 4
typedef struct {
const char *name;
unsigned num_srcs; /** < number of register/SSA inputs */
/** number of components of each input register */
unsigned src_components[NIR_INTRINSIC_MAX_INPUTS];
bool has_dest;
/** number of components of each output register */
unsigned dest_components;
/** the number of inputs/outputs that are variables */
unsigned num_variables;
/** the number of constant indices used by the intrinsic */
unsigned num_indices;
/** semantic flags for calls to this intrinsic */
unsigned flags;
} nir_intrinsic_info;
extern const nir_intrinsic_info nir_intrinsic_infos[nir_num_intrinsics];
/**
* \group texture information
*
* This gives semantic information about textures which is useful to the
* frontend, the backend, and lowering passes, but not the optimizer.
*/
typedef enum {
nir_tex_src_coord,
nir_tex_src_projector,
nir_tex_src_comparitor, /* shadow comparitor */
nir_tex_src_offset,
nir_tex_src_bias,
nir_tex_src_lod,
nir_tex_src_ms_index, /* MSAA sample index */
nir_tex_src_ddx,
nir_tex_src_ddy,
nir_tex_src_sampler_index, /* < dynamically uniform indirect index */
nir_num_texinput_types
} nir_texinput_type;
typedef enum {
nir_texop_tex, /**< Regular texture look-up */
nir_texop_txb, /**< Texture look-up with LOD bias */
nir_texop_txl, /**< Texture look-up with explicit LOD */
nir_texop_txd, /**< Texture look-up with partial derivatvies */
nir_texop_txf, /**< Texel fetch with explicit LOD */
nir_texop_txf_ms, /**< Multisample texture fetch */
nir_texop_txs, /**< Texture size */
nir_texop_lod, /**< Texture lod query */
nir_texop_tg4, /**< Texture gather */
nir_texop_query_levels /**< Texture levels query */
} nir_texop;
typedef struct {
nir_instr instr;
bool has_predicate;
nir_src predicate;
enum glsl_sampler_dim sampler_dim;
nir_alu_type dest_type;
nir_texop op;
nir_dest dest;
nir_src src[4];
nir_texinput_type src_type[4];
unsigned num_srcs, coord_components;
bool is_array, is_shadow;
/**
* If is_shadow is true, whether this is the old-style shadow that outputs 4
* components or the new-style shadow that outputs 1 component.
*/
bool is_new_style_shadow;
/* constant offset - must be 0 if the offset source is used */
int const_offset[4];
/* gather component selector */
unsigned component : 2;
unsigned sampler_index;
nir_deref_var *sampler; /* if this is NULL, use sampler_index instead */
} nir_tex_instr;
static inline unsigned
nir_tex_instr_dest_size(nir_tex_instr *instr)
{
if (instr->op == nir_texop_txs) {
unsigned ret;
switch (instr->sampler_dim) {
case GLSL_SAMPLER_DIM_1D:
case GLSL_SAMPLER_DIM_BUF:
ret = 1;
break;
case GLSL_SAMPLER_DIM_2D:
case GLSL_SAMPLER_DIM_CUBE:
case GLSL_SAMPLER_DIM_MS:
case GLSL_SAMPLER_DIM_RECT:
case GLSL_SAMPLER_DIM_EXTERNAL:
ret = 2;
break;
case GLSL_SAMPLER_DIM_3D:
ret = 3;
break;
default:
assert(0);
break;
}
if (instr->is_array)
ret++;
return ret;
}
if (instr->op == nir_texop_query_levels)
return 2;
if (instr->is_shadow && instr->is_new_style_shadow)
return 1;
return 4;
}
static inline unsigned
nir_tex_instr_src_size(nir_tex_instr *instr, unsigned src)
{
if (instr->src_type[src] == nir_tex_src_coord)
return instr->coord_components;
if (instr->src_type[src] == nir_tex_src_offset ||
instr->src_type[src] == nir_tex_src_ddx ||
instr->src_type[src] == nir_tex_src_ddy) {
if (instr->is_array)
return instr->coord_components - 1;
else
return instr->coord_components;
}
return 1;
}
static inline int
nir_tex_instr_src_index(nir_tex_instr *instr, nir_texinput_type type)
{
for (unsigned i = 0; i < instr->num_srcs; i++)
if (instr->src_type[i] == type)
return (int) i;
return -1;
}
typedef struct {
union {
float f[4];
int32_t i[4];
uint32_t u[4];
};
} nir_const_value;
typedef struct {
nir_instr instr;
union {
nir_const_value value;
nir_const_value *array;
};
unsigned num_components;
/**
* The number of constant array elements to be copied into the variable. If
* this != 0, then value.array holds the array of size array_elems;
* otherwise, value.value holds the single vector constant (the more common
* case, and the only case for SSA destinations).
*/
unsigned array_elems;
bool has_predicate;
nir_src predicate;
nir_dest dest;
} nir_load_const_instr;
typedef enum {
nir_jump_return,
nir_jump_break,
nir_jump_continue,
} nir_jump_type;
typedef struct {
nir_instr instr;
nir_jump_type type;
} nir_jump_instr;
/* creates a new SSA variable in an undefined state */
typedef struct {
nir_instr instr;
nir_ssa_def def;
} nir_ssa_undef_instr;
typedef struct {
struct exec_node node;
struct nir_block *pred;
nir_src src;
} nir_phi_src;
typedef struct {
nir_instr instr;
struct exec_list srcs;
nir_dest dest;
} nir_phi_instr;
#define nir_instr_as_alu(_instr) exec_node_data(nir_alu_instr, _instr, instr)
#define nir_instr_as_call(_instr) exec_node_data(nir_call_instr, _instr, instr)
#define nir_instr_as_jump(_instr) exec_node_data(nir_jump_instr, _instr, instr)
#define nir_instr_as_texture(_instr) \
exec_node_data(nir_tex_instr, _instr, instr)
#define nir_instr_as_intrinsic(_instr) \
exec_node_data(nir_intrinsic_instr, _instr, instr)
#define nir_instr_as_load_const(_instr) \
exec_node_data(nir_load_const_instr, _instr, instr)
#define nir_instr_as_ssa_undef(_instr) \
exec_node_data(nir_ssa_undef_instr, _instr, instr)
#define nir_instr_as_phi(_instr) \
exec_node_data(nir_phi_instr, _instr, instr)
/*
* Control flow
*
* Control flow consists of a tree of control flow nodes, which include
* if-statements and loops. The leaves of the tree are basic blocks, lists of
* instructions that always run start-to-finish. Each basic block also keeps
* track of its successors (blocks which may run immediately after the current
* block) and predecessors (blocks which could have run immediately before the
* current block). Each function also has a start block and an end block which
* all return statements point to (which is always empty). Together, all the
* blocks with their predecessors and successors make up the control flow
* graph (CFG) of the function. There are helpers that modify the tree of
* control flow nodes while modifying the CFG appropriately; these should be
* used instead of modifying the tree directly.
*/
typedef enum {
nir_cf_node_block,
nir_cf_node_if,
nir_cf_node_loop,
nir_cf_node_function
} nir_cf_node_type;
typedef struct nir_cf_node {
struct exec_node node;
nir_cf_node_type type;
struct nir_cf_node *parent;
} nir_cf_node;
typedef struct nir_block {
nir_cf_node cf_node;
struct exec_list instr_list;
unsigned index;
/*
* Each block can only have up to 2 successors, so we put them in a simple
* array - no need for anything more complicated.
*/
struct nir_block *successors[2];
struct set *predecessors;
} nir_block;
#define nir_block_first_instr(block) \
exec_node_data(nir_instr, exec_list_get_head(&(block)->instr_list), node)
#define nir_block_last_instr(block) \
exec_node_data(nir_instr, exec_list_get_tail(&(block)->instr_list), node)
#define nir_foreach_instr(block, instr) \
foreach_list_typed(nir_instr, instr, node, &(block)->instr_list)
#define nir_foreach_instr_reverse(block, instr) \
foreach_list_typed_reverse(nir_instr, instr, node, &(block)->instr_list)
#define nir_foreach_instr_safe(block, instr) \
foreach_list_typed_safe(nir_instr, instr, node, &(block)->instr_list)
typedef struct {
nir_cf_node cf_node;
nir_src condition;
struct exec_list then_list;
struct exec_list else_list;
} nir_if;
#define nir_if_first_then_node(if) \
exec_node_data(nir_cf_node, exec_list_get_head(&(if)->then_list), node)
#define nir_if_last_then_node(if) \
exec_node_data(nir_cf_node, exec_list_get_tail(&(if)->then_list), node)
#define nir_if_first_else_node(if) \
exec_node_data(nir_cf_node, exec_list_get_head(&(if)->else_list), node)
#define nir_if_last_else_node(if) \
exec_node_data(nir_cf_node, exec_list_get_tail(&(if)->else_list), node)
typedef struct {
nir_cf_node cf_node;
struct exec_list body;
} nir_loop;
#define nir_loop_first_cf_node(loop) \
exec_node_data(nir_cf_node, exec_list_get_head(&(loop)->body), node)
#define nir_loop_last_cf_node(loop) \
exec_node_data(nir_cf_node, exec_list_get_tail(&(loop)->body), node)
typedef struct {
nir_cf_node cf_node;
/** pointer to the overload of which this is an implementation */
struct nir_function_overload *overload;
struct exec_list body; /** < list of nir_cf_node */
nir_block *start_block, *end_block;
/** list for all local variables in the function */
struct exec_list locals;
/** array of variables used as parameters */
unsigned num_params;
nir_variable **params;
/** variable used to hold the result of the function */
nir_variable *return_var;
/** list of local registers in the function */
struct exec_list registers;
/** next available local register index */
unsigned reg_alloc;
/** next available SSA value index */
unsigned ssa_alloc;
/* total number of basic blocks, only valid when block_index_dirty = false */
unsigned num_blocks;
bool block_index_dirty;
} nir_function_impl;
#define nir_cf_node_next(_node) \
exec_node_data(nir_cf_node, exec_node_get_next(&(_node)->node), node)
#define nir_cf_node_prev(_node) \
exec_node_data(nir_cf_node, exec_node_get_prev(&(_node)->node), node)
#define nir_cf_node_is_first(_node) \
exec_node_is_head_sentinel((_node)->node.prev)
#define nir_cf_node_is_last(_node) \
exec_node_is_tail_sentinel((_node)->node.next)
#define nir_cf_node_as_block(node) \
exec_node_data(nir_block, node, cf_node)
#define nir_cf_node_as_if(node) \
exec_node_data(nir_if, node, cf_node)
#define nir_cf_node_as_loop(node) \
exec_node_data(nir_loop, node, cf_node)
#define nir_cf_node_as_function(node) \
exec_node_data(nir_function_impl, node, cf_node)
typedef enum {
nir_parameter_in,
nir_parameter_out,
nir_parameter_inout,
} nir_parameter_type;
typedef struct {
nir_parameter_type param_type;
const struct glsl_type *type;
} nir_parameter;
typedef struct nir_function_overload {
struct exec_node node;
unsigned num_params;
nir_parameter *params;
const struct glsl_type *return_type;
nir_function_impl *impl; /** < NULL if the overload is only declared yet */
/** pointer to the function of which this is an overload */
struct nir_function *function;
} nir_function_overload;
typedef struct nir_function {
struct exec_node node;
struct exec_list overload_list;
const char *name;
} nir_function;
#define nir_function_first_overload(func) \
exec_node_data(nir_function_overload, \
exec_list_get_head(&(func)->overload_list), node)
typedef struct nir_shader {
/** hash table of name -> uniform */
struct hash_table *uniforms;
/** hash table of name -> input */
struct hash_table *inputs;
/** hash table of name -> output */
struct hash_table *outputs;
/** list of global variables in the shader */
struct exec_list globals;
struct exec_list system_values;
struct exec_list functions;
/** list of global registers in the shader */
struct exec_list registers;
/** structures used in this shader */
unsigned num_user_structures;
struct glsl_type **user_structures;
/** next available global register index */
unsigned reg_alloc;
} nir_shader;
#define nir_foreach_overload(shader, overload) \
foreach_list_typed(nir_function, func, node, &(shader)->functions) \
foreach_list_typed(nir_function_overload, overload, node, \
&(func)->overload_list)
#ifdef __cplusplus
} /* extern "C" */
#endif
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