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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 "compiler/glsl/list.h"
#include "GL/gl.h" /* GLenum */
#include "util/list.h"
#include "util/ralloc.h"
#include "util/set.h"
#include "util/bitset.h"
#include "util/macros.h"
#include "compiler/nir_types.h"
#include "compiler/shader_enums.h"
#include <stdio.h>
#include "nir_opcodes.h"
#ifdef __cplusplus
extern "C" {
#endif
struct gl_program;
struct gl_shader_program;
#define NIR_FALSE 0u
#define NIR_TRUE (~0u)
/** Defines a cast function
*
* This macro defines a cast function from in_type to out_type where
* out_type is some structure type that contains a field of type out_type.
*
* Note that you have to be a bit careful as the generated cast function
* destroys constness.
*/
#define NIR_DEFINE_CAST(name, in_type, out_type, field) \
static inline out_type * \
name(const in_type *parent) \
{ \
return exec_node_data(out_type, parent, field); \
}
struct nir_function;
struct nir_shader;
struct nir_instr;
/**
* 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 = (1 << 0),
nir_var_shader_out = (1 << 1),
nir_var_global = (1 << 2),
nir_var_local = (1 << 3),
nir_var_uniform = (1 << 4),
nir_var_shader_storage = (1 << 5),
nir_var_system_value = (1 << 6),
nir_var_param = (1 << 7),
nir_var_shared = (1 << 8),
nir_var_all = ~0,
} 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];
double d[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 nir_variable. Constants may be
* scalars, vectors, or matrices.
*/
union nir_constant_data value;
/* we could get this from the var->type but makes clone *much* easier to
* not have to care about the type.
*/
unsigned num_elements;
/* 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 nir_variable {
struct exec_node node;
/**
* Declared type of the variable
*/
const struct glsl_type *type;
/**
* Declared name of the variable
*/
char *name;
struct nir_variable_data {
/**
* Storage class of the variable.
*
* \sa nir_variable_mode
*/
nir_variable_mode mode;
/**
* 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 patch:1;
unsigned invariant:1;
/**
* Interpolation mode for shader inputs / outputs
*
* \sa glsl_interp_mode
*/
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_initializer contains an integer nir_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;
/**
* 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;
/**
* \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.
* - Non-UBO Uniforms: uniform slot number.
* - 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;
/**
* Descriptor set binding for sampler or UBO.
*/
int descriptor_set;
/**
* 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.
*/
unsigned offset;
/**
* 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. */
/*@}*/
/**
* Constant expression assigned in the initializer of the variable
*/
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;
#define nir_foreach_variable(var, var_list) \
foreach_list_typed(nir_variable, var, node, var_list)
#define nir_foreach_variable_safe(var, var_list) \
foreach_list_typed_safe(nir_variable, var, node, var_list)
static inline bool
nir_variable_is_global(const nir_variable *var)
{
return var->data.mode != nir_var_local && var->data.mode != nir_var_param;
}
typedef struct nir_register {
struct exec_node node;
unsigned num_components; /** < number of vector components */
unsigned num_array_elems; /** < size of array (0 for no array) */
/* The bit-size of each channel; must be one of 8, 16, 32, or 64 */
uint8_t bit_size;
/** generic register index. */
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_src's where this register is used (read from) */
struct list_head uses;
/** set of nir_dest's where this register is defined (written to) */
struct list_head defs;
/** set of nir_if's where this register is used as a condition */
struct list_head if_uses;
} nir_register;
typedef enum {
nir_instr_type_alu,
nir_instr_type_call,
nir_instr_type_tex,
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_parallel_copy,
} nir_instr_type;
typedef struct nir_instr {
struct exec_node node;
nir_instr_type type;
struct nir_block *block;
/** generic instruction index. */
unsigned index;
/* A temporary for optimization and analysis passes to use for storing
* flags. For instance, DCE uses this to store the "dead/live" info.
*/
uint8_t pass_flags;
} nir_instr;
static inline nir_instr *
nir_instr_next(nir_instr *instr)
{
struct exec_node *next = exec_node_get_next(&instr->node);
if (exec_node_is_tail_sentinel(next))
return NULL;
else
return exec_node_data(nir_instr, next, node);
}
static inline nir_instr *
nir_instr_prev(nir_instr *instr)
{
struct exec_node *prev = exec_node_get_prev(&instr->node);
if (exec_node_is_head_sentinel(prev))
return NULL;
else
return exec_node_data(nir_instr, prev, node);
}
static inline bool
nir_instr_is_first(nir_instr *instr)
{
return exec_node_is_head_sentinel(exec_node_get_prev(&instr->node));
}
static inline bool
nir_instr_is_last(nir_instr *instr)
{
return exec_node_is_tail_sentinel(exec_node_get_next(&instr->node));
}
typedef struct nir_ssa_def {
/** for debugging only, can be NULL */
const char* name;
/** generic SSA definition index. */
unsigned index;
/** Index into the live_in and live_out bitfields */
unsigned live_index;
nir_instr *parent_instr;
/** set of nir_instr's where this register is used (read from) */
struct list_head uses;
/** set of nir_if's where this register is used as a condition */
struct list_head if_uses;
uint8_t num_components;
/* The bit-size of each channel; must be one of 8, 16, 32, or 64 */
uint8_t bit_size;
} 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_instr *parent_instr;
struct list_head def_link;
nir_register *reg;
struct nir_src *indirect; /** < NULL for no indirect offset */
unsigned base_offset;
/* TODO def-use chain goes here */
} nir_reg_dest;
struct nir_if;
typedef struct nir_src {
union {
nir_instr *parent_instr;
struct nir_if *parent_if;
};
struct list_head use_link;
union {
nir_reg_src reg;
nir_ssa_def *ssa;
};
bool is_ssa;
} nir_src;
static inline nir_src
nir_src_init(void)
{
nir_src src = { { NULL } };
return src;
}
#define NIR_SRC_INIT nir_src_init()
#define nir_foreach_use(src, reg_or_ssa_def) \
list_for_each_entry(nir_src, src, &(reg_or_ssa_def)->uses, use_link)
#define nir_foreach_use_safe(src, reg_or_ssa_def) \
list_for_each_entry_safe(nir_src, src, &(reg_or_ssa_def)->uses, use_link)
#define nir_foreach_if_use(src, reg_or_ssa_def) \
list_for_each_entry(nir_src, src, &(reg_or_ssa_def)->if_uses, use_link)
#define nir_foreach_if_use_safe(src, reg_or_ssa_def) \
list_for_each_entry_safe(nir_src, src, &(reg_or_ssa_def)->if_uses, use_link)
typedef struct {
union {
nir_reg_dest reg;
nir_ssa_def ssa;
};
bool is_ssa;
} nir_dest;
static inline nir_dest
nir_dest_init(void)
{
nir_dest dest = { { { NULL } } };
return dest;
}
#define NIR_DEST_INIT nir_dest_init()
#define nir_foreach_def(dest, reg) \
list_for_each_entry(nir_dest, dest, &(reg)->defs, reg.def_link)
#define nir_foreach_def_safe(dest, reg) \
list_for_each_entry_safe(nir_dest, dest, &(reg)->defs, reg.def_link)
static inline nir_src
nir_src_for_ssa(nir_ssa_def *def)
{
nir_src src = NIR_SRC_INIT;
src.is_ssa = true;
src.ssa = def;
return src;
}
static inline nir_src
nir_src_for_reg(nir_register *reg)
{
nir_src src = NIR_SRC_INIT;
src.is_ssa = false;
src.reg.reg = reg;
src.reg.indirect = NULL;
src.reg.base_offset = 0;
return src;
}
static inline nir_dest
nir_dest_for_reg(nir_register *reg)
{
nir_dest dest = NIR_DEST_INIT;
dest.reg.reg = reg;
return dest;
}
static inline unsigned
nir_src_bit_size(nir_src src)
{
return src.is_ssa ? src.ssa->bit_size : src.reg.reg->bit_size;
}
static inline unsigned
nir_dest_bit_size(nir_dest dest)
{
return dest.is_ssa ? dest.ssa.bit_size : dest.reg.reg->bit_size;
}
void nir_src_copy(nir_src *dest, const nir_src *src, void *instr_or_if);
void nir_dest_copy(nir_dest *dest, const nir_dest *src, nir_instr *instr);
typedef struct {
nir_src src;
/**
* \name input modifiers
*/
/*@{*/
/**
* For inputs interpreted as floating point, flips the sign bit. For
* inputs interpreted as integers, 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;
typedef enum {
nir_type_invalid = 0, /* Not a valid type */
nir_type_float,
nir_type_int,
nir_type_uint,
nir_type_bool,
nir_type_bool32 = 32 | nir_type_bool,
nir_type_int8 = 8 | nir_type_int,
nir_type_int16 = 16 | nir_type_int,
nir_type_int32 = 32 | nir_type_int,
nir_type_int64 = 64 | nir_type_int,
nir_type_uint8 = 8 | nir_type_uint,
nir_type_uint16 = 16 | nir_type_uint,
nir_type_uint32 = 32 | nir_type_uint,
nir_type_uint64 = 64 | nir_type_uint,
nir_type_float16 = 16 | nir_type_float,
nir_type_float32 = 32 | nir_type_float,
nir_type_float64 = 64 | nir_type_float,
} nir_alu_type;
#define NIR_ALU_TYPE_SIZE_MASK 0xfffffff8
#define NIR_ALU_TYPE_BASE_TYPE_MASK 0x00000007
static inline unsigned
nir_alu_type_get_type_size(nir_alu_type type)
{
return type & NIR_ALU_TYPE_SIZE_MASK;
}
static inline unsigned
nir_alu_type_get_base_type(nir_alu_type type)
{
return type & NIR_ALU_TYPE_BASE_TYPE_MASK;
}
typedef enum {
NIR_OP_IS_COMMUTATIVE = (1 << 0),
NIR_OP_IS_ASSOCIATIVE = (1 << 1),
} nir_op_algebraic_property;
typedef struct {
const char *name;
unsigned num_inputs;
/**
* The number of components in the output
*
* If non-zero, this is the size of the output and input sizes 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.
*
* If zero, 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.
*
* The size of some of the inputs may be given (i.e. non-zero) even
* though output_size is zero; in that case, the inputs with a zero
* size act per-component, while the inputs with non-zero size don't.
*/
unsigned output_size;
/**
* The type of vector that the instruction outputs. Note that the
* staurate modifier is only allowed on outputs with the float type.
*/
nir_alu_type output_type;
/**
* The number of components in each input
*/
unsigned input_sizes[4];
/**
* The type of vector that each input takes. Note that negate and
* absolute value are only allowed on inputs with int or float type and
* behave differently on the two.
*/
nir_alu_type input_types[4];
nir_op_algebraic_property algebraic_properties;
} 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;
/** Indicates that this ALU instruction generates an exact value
*
* This is kind of a mixture of GLSL "precise" and "invariant" and not
* really equivalent to either. This indicates that the value generated by
* this operation is high-precision and any code transformations that touch
* it must ensure that the resulting value is bit-for-bit identical to the
* original.
*/
bool exact;
nir_alu_dest dest;
nir_alu_src src[];
} nir_alu_instr;
void nir_alu_src_copy(nir_alu_src *dest, const nir_alu_src *src,
nir_alu_instr *instr);
void nir_alu_dest_copy(nir_alu_dest *dest, const nir_alu_dest *src,
nir_alu_instr *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;
}
/*
* For instructions whose destinations are SSA, get the number of channels
* used for a source
*/
static inline unsigned
nir_ssa_alu_instr_src_components(const nir_alu_instr *instr, unsigned src)
{
assert(instr->dest.dest.is_ssa);
if (nir_op_infos[instr->op].input_sizes[src] > 0)
return nir_op_infos[instr->op].input_sizes[src];
return instr->dest.dest.ssa.num_components;
}
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;
/* This enum describes how the array is referenced. If the deref is
* direct then the base_offset is used. If the deref is indirect then
* offset is given by base_offset + indirect. If the deref is a wildcard
* then the deref refers to all of the elements of the array at the same
* time. Wildcard dereferences are only ever allowed in copy_var
* intrinsics and the source and destination derefs must have matching
* wildcards.
*/
typedef enum {
nir_deref_array_type_direct,
nir_deref_array_type_indirect,
nir_deref_array_type_wildcard,
} nir_deref_array_type;
typedef struct {
nir_deref deref;
nir_deref_array_type deref_array_type;
unsigned base_offset;
nir_src indirect;
} nir_deref_array;
typedef struct {
nir_deref deref;
unsigned index;
} nir_deref_struct;
NIR_DEFINE_CAST(nir_deref_as_var, nir_deref, nir_deref_var, deref)
NIR_DEFINE_CAST(nir_deref_as_array, nir_deref, nir_deref_array, deref)
NIR_DEFINE_CAST(nir_deref_as_struct, nir_deref, nir_deref_struct, deref)
/* Returns the last deref in the chain. */
static inline nir_deref *
nir_deref_tail(nir_deref *deref)
{
while (deref->child)
deref = deref->child;
return deref;
}
typedef struct {
nir_instr instr;
unsigned num_params;
nir_deref_var **params;
nir_deref_var *return_deref;
struct nir_function *callee;
} nir_call_instr;
#define INTRINSIC(name, num_srcs, src_components, has_dest, dest_components, \
num_variables, num_indices, idx0, idx1, idx2, 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
#define NIR_INTRINSIC_MAX_CONST_INDEX 3
/** Represents an intrinsic
*
* An intrinsic is an instruction type for handling things that are
* more-or-less regular operations but don't just consume and produce SSA
* values like ALU operations do. Intrinsics are not for things that have
* special semantic meaning such as phi nodes and parallel copies.
* Examples of intrinsics include variable load/store operations, system
* value loads, and the like. Even though texturing more-or-less falls
* under this category, texturing is its own instruction type because
* trying to represent texturing with intrinsics would lead to a
* combinatorial explosion of intrinsic opcodes.
*
* By having a single instruction type for handling a lot of different
* cases, optimization passes can look for intrinsics and, for the most
* part, completely ignore them. Each intrinsic type also has a few
* possible flags that govern whether or not they can be reordered or
* eliminated. That way passes like dead code elimination can still work
* on intrisics without understanding the meaning of each.
*
* Each intrinsic has some number of constant indices, some number of
* variables, and some number of sources. What these sources, variables,
* and indices mean depends on the intrinsic and is documented with the
* intrinsic declaration in nir_intrinsics.h. Intrinsics and texture
* instructions are the only types of instruction that can operate on
* variables.
*/
typedef struct {
nir_instr instr;
nir_intrinsic_op intrinsic;
nir_dest dest;
/** number of components if this is a vectorized intrinsic
*
* Similarly to ALU operations, some intrinsics are vectorized.
* An intrinsic is vectorized if nir_intrinsic_infos.dest_components == 0.
* For vectorized intrinsics, the num_components field specifies the
* number of destination components and the number of source components
* for all sources with nir_intrinsic_infos.src_components[i] == 0.
*/
uint8_t num_components;
int const_index[NIR_INTRINSIC_MAX_CONST_INDEX];
nir_deref_var *variables[2];
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
*/
typedef enum {
/**
* whether the intrinsic can be safely eliminated if none of its output
* value is not being used.
*/
NIR_INTRINSIC_CAN_ELIMINATE = (1 << 0),
/**
* Whether the intrinsic can be reordered with respect to any other
* intrinsic, i.e. whether the only reordering dependencies of the
* intrinsic are due to the register reads/writes.
*/
NIR_INTRINSIC_CAN_REORDER = (1 << 1),
} nir_intrinsic_semantic_flag;
/**
* \name NIR intrinsics const-index flag
*
* Indicates the usage of a const_index slot.
*
* \sa nir_intrinsic_info::index_map
*/
typedef enum {
/**
* Generally instructions that take a offset src argument, can encode
* a constant 'base' value which is added to the offset.
*/
NIR_INTRINSIC_BASE = 1,
/**
* For store instructions, a writemask for the store.
*/
NIR_INTRINSIC_WRMASK = 2,
/**
* The stream-id for GS emit_vertex/end_primitive intrinsics.
*/
NIR_INTRINSIC_STREAM_ID = 3,
/**
* The clip-plane id for load_user_clip_plane intrinsic.
*/
NIR_INTRINSIC_UCP_ID = 4,
/**
* The amount of data, starting from BASE, that this instruction may
* access. This is used to provide bounds if the offset is not constant.
*/
NIR_INTRINSIC_RANGE = 5,
/**
* The Vulkan descriptor set for vulkan_resource_index intrinsic.
*/
NIR_INTRINSIC_DESC_SET = 6,
/**
* The Vulkan descriptor set binding for vulkan_resource_index intrinsic.
*/
NIR_INTRINSIC_BINDING = 7,
/**
* Component offset.
*/
NIR_INTRINSIC_COMPONENT = 8,
/**
* Interpolation mode (only meaningful for FS inputs).
*/
NIR_INTRINSIC_INTERP_MODE = 9,
NIR_INTRINSIC_NUM_INDEX_FLAGS,
} nir_intrinsic_index_flag;
#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
*
* If this value is 0, the number of components is given by the
* num_components field of nir_intrinsic_instr.
*/
unsigned src_components[NIR_INTRINSIC_MAX_INPUTS];
bool has_dest;
/** number of components of the output register
*
* If this value is 0, the number of components is given by the
* num_components field of nir_intrinsic_instr.
*/
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;
/** indicates the usage of intr->const_index[n] */
unsigned index_map[NIR_INTRINSIC_NUM_INDEX_FLAGS];
/** semantic flags for calls to this intrinsic */
nir_intrinsic_semantic_flag flags;
} nir_intrinsic_info;
extern const nir_intrinsic_info nir_intrinsic_infos[nir_num_intrinsics];
#define INTRINSIC_IDX_ACCESSORS(name, flag, type) \
static inline type \
nir_intrinsic_##name(nir_intrinsic_instr *instr) \
{ \
const nir_intrinsic_info *info = &nir_intrinsic_infos[instr->intrinsic]; \
assert(info->index_map[NIR_INTRINSIC_##flag] > 0); \
return instr->const_index[info->index_map[NIR_INTRINSIC_##flag] - 1]; \
} \
static inline void \
nir_intrinsic_set_##name(nir_intrinsic_instr *instr, type val) \
{ \
const nir_intrinsic_info *info = &nir_intrinsic_infos[instr->intrinsic]; \
assert(info->index_map[NIR_INTRINSIC_##flag] > 0); \
instr->const_index[info->index_map[NIR_INTRINSIC_##flag] - 1] = val; \
}
INTRINSIC_IDX_ACCESSORS(write_mask, WRMASK, unsigned)
INTRINSIC_IDX_ACCESSORS(base, BASE, int)
INTRINSIC_IDX_ACCESSORS(stream_id, STREAM_ID, unsigned)
INTRINSIC_IDX_ACCESSORS(ucp_id, UCP_ID, unsigned)
INTRINSIC_IDX_ACCESSORS(range, RANGE, unsigned)
INTRINSIC_IDX_ACCESSORS(desc_set, DESC_SET, unsigned)
INTRINSIC_IDX_ACCESSORS(binding, BINDING, unsigned)
INTRINSIC_IDX_ACCESSORS(component, COMPONENT, unsigned)
INTRINSIC_IDX_ACCESSORS(interp_mode, INTERP_MODE, unsigned)
/**
* \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_ms_mcs, /* MSAA compression value */
nir_tex_src_ddx,
nir_tex_src_ddy,
nir_tex_src_texture_offset, /* < dynamically uniform indirect offset */
nir_tex_src_sampler_offset, /* < dynamically uniform indirect offset */
nir_tex_src_plane, /* < selects plane for planar textures */
nir_num_tex_src_types
} nir_tex_src_type;
typedef struct {
nir_src src;
nir_tex_src_type src_type;
} nir_tex_src;
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_txf_ms_mcs, /**< Multisample compression value 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_texture_samples, /**< Texture samples query */
nir_texop_samples_identical, /**< Query whether all samples are definitely
* identical.
*/
} nir_texop;
typedef struct {
nir_instr instr;
enum glsl_sampler_dim sampler_dim;
nir_alu_type dest_type;
nir_texop op;
nir_dest dest;
nir_tex_src *src;
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;
/* gather component selector */
unsigned component : 2;
/** The texture index
*
* If this texture instruction has a nir_tex_src_texture_offset source,
* then the texture index is given by texture_index + texture_offset.
*/
unsigned texture_index;
/** The size of the texture array or 0 if it's not an array */
unsigned texture_array_size;
/** The texture deref
*
* If this is null, use texture_index instead.
*/
nir_deref_var *texture;
/** The sampler index
*
* The following operations do not require a sampler and, as such, this
* field should be ignored:
* - nir_texop_txf
* - nir_texop_txf_ms
* - nir_texop_txs
* - nir_texop_lod
* - nir_texop_tg4
* - nir_texop_query_levels
* - nir_texop_texture_samples
* - nir_texop_samples_identical
*
* If this texture instruction has a nir_tex_src_sampler_offset source,
* then the sampler index is given by sampler_index + sampler_offset.
*/
unsigned sampler_index;
/** The sampler deref
*
* If this is null, use sampler_index instead.
*/
nir_deref_var *sampler;
} nir_tex_instr;
static inline unsigned
nir_tex_instr_dest_size(nir_tex_instr *instr)
{
switch (instr->op) {
case 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:
unreachable("not reached");
}
if (instr->is_array)
ret++;
return ret;
}
case nir_texop_lod:
return 2;
case nir_texop_texture_samples:
case nir_texop_query_levels:
case nir_texop_samples_identical:
return 1;
default:
if (instr->is_shadow && instr->is_new_style_shadow)
return 1;
return 4;
}
}
/* Returns true if this texture operation queries something about the texture
* rather than actually sampling it.
*/
static inline bool
nir_tex_instr_is_query(nir_tex_instr *instr)
{
switch (instr->op) {
case nir_texop_txs:
case nir_texop_lod:
case nir_texop_texture_samples:
case nir_texop_query_levels:
case nir_texop_txf_ms_mcs:
return true;
case nir_texop_tex:
case nir_texop_txb:
case nir_texop_txl:
case nir_texop_txd:
case nir_texop_txf:
case nir_texop_txf_ms:
case nir_texop_tg4:
return false;
default:
unreachable("Invalid texture opcode");
}
}
static inline unsigned
nir_tex_instr_src_size(nir_tex_instr *instr, unsigned src)
{
if (instr->src[src].src_type == nir_tex_src_coord)
return instr->coord_components;
/* The MCS value is expected to be a vec4 returned by a txf_ms_mcs */
if (instr->src[src].src_type == nir_tex_src_ms_mcs)
return 4;
if (instr->src[src].src_type == nir_tex_src_offset ||
instr->src[src].src_type == nir_tex_src_ddx ||
instr->src[src].src_type == 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_tex_src_type type)
{
for (unsigned i = 0; i < instr->num_srcs; i++)
if (instr->src[i].src_type == type)
return (int) i;
return -1;
}
typedef union {
float f32[4];
double f64[4];
int32_t i32[4];
uint32_t u32[4];
int64_t i64[4];
uint64_t u64[4];
} nir_const_value;
typedef struct {
nir_instr instr;
nir_const_value value;
nir_ssa_def def;
} 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;
/* The predecessor block corresponding to this source */
struct nir_block *pred;
nir_src src;
} nir_phi_src;
#define nir_foreach_phi_src(phi_src, phi) \
foreach_list_typed(nir_phi_src, phi_src, node, &(phi)->srcs)
#define nir_foreach_phi_src_safe(phi_src, phi) \
foreach_list_typed_safe(nir_phi_src, phi_src, node, &(phi)->srcs)
typedef struct {
nir_instr instr;
struct exec_list srcs; /** < list of nir_phi_src */
nir_dest dest;
} nir_phi_instr;
typedef struct {
struct exec_node node;
nir_src src;
nir_dest dest;
} nir_parallel_copy_entry;
#define nir_foreach_parallel_copy_entry(entry, pcopy) \
foreach_list_typed(nir_parallel_copy_entry, entry, node, &(pcopy)->entries)
typedef struct {
nir_instr instr;
/* A list of nir_parallel_copy_entry's. The sources of all of the
* entries are copied to the corresponding destinations "in parallel".
* In other words, if we have two entries: a -> b and b -> a, the values
* get swapped.
*/
struct exec_list entries;
} nir_parallel_copy_instr;
NIR_DEFINE_CAST(nir_instr_as_alu, nir_instr, nir_alu_instr, instr)
NIR_DEFINE_CAST(nir_instr_as_call, nir_instr, nir_call_instr, instr)
NIR_DEFINE_CAST(nir_instr_as_jump, nir_instr, nir_jump_instr, instr)
NIR_DEFINE_CAST(nir_instr_as_tex, nir_instr, nir_tex_instr, instr)
NIR_DEFINE_CAST(nir_instr_as_intrinsic, nir_instr, nir_intrinsic_instr, instr)
NIR_DEFINE_CAST(nir_instr_as_load_const, nir_instr, nir_load_const_instr, instr)
NIR_DEFINE_CAST(nir_instr_as_ssa_undef, nir_instr, nir_ssa_undef_instr, instr)
NIR_DEFINE_CAST(nir_instr_as_phi, nir_instr, nir_phi_instr, instr)
NIR_DEFINE_CAST(nir_instr_as_parallel_copy, nir_instr,
nir_parallel_copy_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; /** < list of nir_instr */
/** generic block index; generated by nir_index_blocks */
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];
/* Set of nir_block predecessors in the CFG */
struct set *predecessors;
/*
* this node's immediate dominator in the dominance tree - set to NULL for
* the start block.
*/
struct nir_block *imm_dom;
/* This node's children in the dominance tree */
unsigned num_dom_children;
struct nir_block **dom_children;
/* Set of nir_block's on the dominance frontier of this block */
struct set *dom_frontier;
/*
* These two indices have the property that dom_{pre,post}_index for each
* child of this block in the dominance tree will always be between
* dom_pre_index and dom_post_index for this block, which makes testing if
* a given block is dominated by another block an O(1) operation.
*/
unsigned dom_pre_index, dom_post_index;
/* live in and out for this block; used for liveness analysis */
BITSET_WORD *live_in;
BITSET_WORD *live_out;
} nir_block;
static inline nir_instr *
nir_block_first_instr(nir_block *block)
{
struct exec_node *head = exec_list_get_head(&block->instr_list);
return exec_node_data(nir_instr, head, node);
}
static inline nir_instr *
nir_block_last_instr(nir_block *block)
{
struct exec_node *tail = exec_list_get_tail(&block->instr_list);
return exec_node_data(nir_instr, tail, node);
}
#define nir_foreach_instr(instr, block) \
foreach_list_typed(nir_instr, instr, node, &(block)->instr_list)
#define nir_foreach_instr_reverse(instr, block) \
foreach_list_typed_reverse(nir_instr, instr, node, &(block)->instr_list)
#define nir_foreach_instr_safe(instr, block) \
foreach_list_typed_safe(nir_instr, instr, node, &(block)->instr_list)
#define nir_foreach_instr_reverse_safe(instr, block) \
foreach_list_typed_reverse_safe(nir_instr, instr, node, &(block)->instr_list)
typedef struct nir_if {
nir_cf_node cf_node;
nir_src condition;
struct exec_list then_list; /** < list of nir_cf_node */
struct exec_list else_list; /** < list of nir_cf_node */
} nir_if;
static inline nir_cf_node *
nir_if_first_then_node(nir_if *if_stmt)
{
struct exec_node *head = exec_list_get_head(&if_stmt->then_list);
return exec_node_data(nir_cf_node, head, node);
}
static inline nir_cf_node *
nir_if_last_then_node(nir_if *if_stmt)
{
struct exec_node *tail = exec_list_get_tail(&if_stmt->then_list);
return exec_node_data(nir_cf_node, tail, node);
}
static inline nir_cf_node *
nir_if_first_else_node(nir_if *if_stmt)
{
struct exec_node *head = exec_list_get_head(&if_stmt->else_list);
return exec_node_data(nir_cf_node, head, node);
}
static inline nir_cf_node *
nir_if_last_else_node(nir_if *if_stmt)
{
struct exec_node *tail = exec_list_get_tail(&if_stmt->else_list);
return exec_node_data(nir_cf_node, tail, node);
}
typedef struct {
nir_cf_node cf_node;
struct exec_list body; /** < list of nir_cf_node */
} nir_loop;
static inline nir_cf_node *
nir_loop_first_cf_node(nir_loop *loop)
{
return exec_node_data(nir_cf_node, exec_list_get_head(&loop->body), node);
}
static inline nir_cf_node *
nir_loop_last_cf_node(nir_loop *loop)
{
return exec_node_data(nir_cf_node, exec_list_get_tail(&loop->body), node);
}
/**
* Various bits of metadata that can may be created or required by
* optimization and analysis passes
*/
typedef enum {
nir_metadata_none = 0x0,
nir_metadata_block_index = 0x1,
nir_metadata_dominance = 0x2,
nir_metadata_live_ssa_defs = 0x4,
nir_metadata_not_properly_reset = 0x8,
} nir_metadata;
typedef struct {
nir_cf_node cf_node;
/** pointer to the function of which this is an implementation */
struct nir_function *function;
struct exec_list body; /** < list of nir_cf_node */
nir_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;
nir_metadata valid_metadata;
} nir_function_impl;
ATTRIBUTE_RETURNS_NONNULL static inline nir_block *
nir_start_block(nir_function_impl *impl)
{
return (nir_block *) impl->body.head;
}
ATTRIBUTE_RETURNS_NONNULL static inline nir_block *
nir_impl_last_block(nir_function_impl *impl)
{
return (nir_block *) impl->body.tail_pred;
}
static inline nir_cf_node *
nir_cf_node_next(nir_cf_node *node)
{
struct exec_node *next = exec_node_get_next(&node->node);
if (exec_node_is_tail_sentinel(next))
return NULL;
else
return exec_node_data(nir_cf_node, next, node);
}
static inline nir_cf_node *
nir_cf_node_prev(nir_cf_node *node)
{
struct exec_node *prev = exec_node_get_prev(&node->node);
if (exec_node_is_head_sentinel(prev))
return NULL;
else
return exec_node_data(nir_cf_node, prev, node);
}
static inline bool
nir_cf_node_is_first(const nir_cf_node *node)
{
return exec_node_is_head_sentinel(node->node.prev);
}
static inline bool
nir_cf_node_is_last(const nir_cf_node *node)
{
return exec_node_is_tail_sentinel(node->node.next);
}
NIR_DEFINE_CAST(nir_cf_node_as_block, nir_cf_node, nir_block, cf_node)
NIR_DEFINE_CAST(nir_cf_node_as_if, nir_cf_node, nir_if, cf_node)
NIR_DEFINE_CAST(nir_cf_node_as_loop, nir_cf_node, nir_loop, cf_node)
NIR_DEFINE_CAST(nir_cf_node_as_function, nir_cf_node, nir_function_impl, 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 {
struct exec_node node;
const char *name;
struct nir_shader *shader;
unsigned num_params;
nir_parameter *params;
const struct glsl_type *return_type;
/** The implementation of this function.
*
* If the function is only declared and not implemented, this is NULL.
*/
nir_function_impl *impl;
} nir_function;
typedef struct nir_shader_compiler_options {
bool lower_fdiv;
bool lower_ffma;
bool fuse_ffma;
bool lower_flrp32;
/** Lowers flrp when it does not support doubles */
bool lower_flrp64;
bool lower_fpow;
bool lower_fsat;
bool lower_fsqrt;
bool lower_fmod32;
bool lower_fmod64;
bool lower_bitfield_extract;
bool lower_bitfield_insert;
bool lower_uadd_carry;
bool lower_usub_borrow;
/** lowers fneg and ineg to fsub and isub. */
bool lower_negate;
/** lowers fsub and isub to fadd+fneg and iadd+ineg. */
bool lower_sub;
/* lower {slt,sge,seq,sne} to {flt,fge,feq,fne} + b2f: */
bool lower_scmp;
/** enables rules to lower idiv by power-of-two: */
bool lower_idiv;
/* Does the native fdot instruction replicate its result for four
* components? If so, then opt_algebraic_late will turn all fdotN
* instructions into fdot_replicatedN instructions.
*/
bool fdot_replicates;
/** lowers ffract to fsub+ffloor: */
bool lower_ffract;
bool lower_pack_half_2x16;
bool lower_pack_unorm_2x16;
bool lower_pack_snorm_2x16;
bool lower_pack_unorm_4x8;
bool lower_pack_snorm_4x8;
bool lower_unpack_half_2x16;
bool lower_unpack_unorm_2x16;
bool lower_unpack_snorm_2x16;
bool lower_unpack_unorm_4x8;
bool lower_unpack_snorm_4x8;
bool lower_extract_byte;
bool lower_extract_word;
/**
* Does the driver support real 32-bit integers? (Otherwise, integers
* are simulated by floats.)
*/
bool native_integers;
/* Indicates that the driver only has zero-based vertex id */
bool vertex_id_zero_based;
bool lower_cs_local_index_from_id;
} nir_shader_compiler_options;
typedef struct nir_shader_info {
const char *name;
/* Descriptive name provided by the client; may be NULL */
const char *label;
/* Number of textures used by this shader */
unsigned num_textures;
/* Number of uniform buffers used by this shader */
unsigned num_ubos;
/* Number of atomic buffers used by this shader */
unsigned num_abos;
/* Number of shader storage buffers used by this shader */
unsigned num_ssbos;
/* Number of images used by this shader */
unsigned num_images;
/* Which inputs are actually read */
uint64_t inputs_read;
/* Which inputs are actually read and are double */
uint64_t double_inputs_read;
/* Which outputs are actually written */
uint64_t outputs_written;
/* Which system values are actually read */
uint64_t system_values_read;
/* Which patch inputs are actually read */
uint32_t patch_inputs_read;
/* Which patch outputs are actually written */
uint32_t patch_outputs_written;
/* Whether or not this shader ever uses textureGather() */
bool uses_texture_gather;
/* Whether or not this shader uses the gl_ClipDistance output */
bool uses_clip_distance_out;
/* Whether or not separate shader objects were used */
bool separate_shader;
/** Was this shader linked with any transform feedback varyings? */
bool has_transform_feedback_varyings;
union {
struct {
/** The number of vertices recieves per input primitive */
unsigned vertices_in;
/** The output primitive type (GL enum value) */
unsigned output_primitive;
/** The maximum number of vertices the geometry shader might write. */
unsigned vertices_out;
/** 1 .. MAX_GEOMETRY_SHADER_INVOCATIONS */
unsigned invocations;
/** Whether or not this shader uses EndPrimitive */
bool uses_end_primitive;
/** Whether or not this shader uses non-zero streams */
bool uses_streams;
} gs;
struct {
bool uses_discard;
/**
* Whether any inputs are declared with the "sample" qualifier.
*/
bool uses_sample_qualifier;
/**
* Whether early fragment tests are enabled as defined by
* ARB_shader_image_load_store.
*/
bool early_fragment_tests;
/** gl_FragDepth layout for ARB_conservative_depth. */
enum gl_frag_depth_layout depth_layout;
} fs;
struct {
unsigned local_size[3];
} cs;
struct {
/** The number of vertices in the TCS output patch. */
unsigned vertices_out;
} tcs;
};
} nir_shader_info;
typedef struct nir_shader {
/** list of uniforms (nir_variable) */
struct exec_list uniforms;
/** list of inputs (nir_variable) */
struct exec_list inputs;
/** list of outputs (nir_variable) */
struct exec_list outputs;
/** list of shared compute variables (nir_variable) */
struct exec_list shared;
/** Set of driver-specific options for the shader.
*
* The memory for the options is expected to be kept in a single static
* copy by the driver.
*/
const struct nir_shader_compiler_options *options;
/** Various bits of compile-time information about a given shader */
struct nir_shader_info info;
/** list of global variables in the shader (nir_variable) */
struct exec_list globals;
/** list of system value variables in the shader (nir_variable) */
struct exec_list system_values;
struct exec_list functions; /** < list of nir_function */
/** list of global register in the shader */
struct exec_list registers;
/** next available global register index */
unsigned reg_alloc;
/**
* the highest index a load_input_*, load_uniform_*, etc. intrinsic can
* access plus one
*/
unsigned num_inputs, num_uniforms, num_outputs, num_shared;
/** The shader stage, such as MESA_SHADER_VERTEX. */
gl_shader_stage stage;
} nir_shader;
static inline nir_function *
nir_shader_get_entrypoint(nir_shader *shader)
{
assert(exec_list_length(&shader->functions) == 1);
struct exec_node *func_node = exec_list_get_head(&shader->functions);
nir_function *func = exec_node_data(nir_function, func_node, node);
assert(func->return_type == glsl_void_type());
assert(func->num_params == 0);
return func;
}
#define nir_foreach_function(func, shader) \
foreach_list_typed(nir_function, func, node, &(shader)->functions)
nir_shader *nir_shader_create(void *mem_ctx,
gl_shader_stage stage,
const nir_shader_compiler_options *options);
/** creates a register, including assigning it an index and adding it to the list */
nir_register *nir_global_reg_create(nir_shader *shader);
nir_register *nir_local_reg_create(nir_function_impl *impl);
void nir_reg_remove(nir_register *reg);
/** Adds a variable to the appropreate list in nir_shader */
void nir_shader_add_variable(nir_shader *shader, nir_variable *var);
static inline void
nir_function_impl_add_variable(nir_function_impl *impl, nir_variable *var)
{
assert(var->data.mode == nir_var_local);
exec_list_push_tail(&impl->locals, &var->node);
}
/** creates a variable, sets a few defaults, and adds it to the list */
nir_variable *nir_variable_create(nir_shader *shader,
nir_variable_mode mode,
const struct glsl_type *type,
const char *name);
/** creates a local variable and adds it to the list */
nir_variable *nir_local_variable_create(nir_function_impl *impl,
const struct glsl_type *type,
const char *name);
/** creates a function and adds it to the shader's list of functions */
nir_function *nir_function_create(nir_shader *shader, const char *name);
nir_function_impl *nir_function_impl_create(nir_function *func);
/** creates a function_impl that isn't tied to any particular function */
nir_function_impl *nir_function_impl_create_bare(nir_shader *shader);
nir_block *nir_block_create(nir_shader *shader);
nir_if *nir_if_create(nir_shader *shader);
nir_loop *nir_loop_create(nir_shader *shader);
nir_function_impl *nir_cf_node_get_function(nir_cf_node *node);
/** requests that the given pieces of metadata be generated */
void nir_metadata_require(nir_function_impl *impl, nir_metadata required);
/** dirties all but the preserved metadata */
void nir_metadata_preserve(nir_function_impl *impl, nir_metadata preserved);
/** creates an instruction with default swizzle/writemask/etc. with NULL registers */
nir_alu_instr *nir_alu_instr_create(nir_shader *shader, nir_op op);
nir_jump_instr *nir_jump_instr_create(nir_shader *shader, nir_jump_type type);
nir_load_const_instr *nir_load_const_instr_create(nir_shader *shader,
unsigned num_components,
unsigned bit_size);
nir_intrinsic_instr *nir_intrinsic_instr_create(nir_shader *shader,
nir_intrinsic_op op);
nir_call_instr *nir_call_instr_create(nir_shader *shader,
nir_function *callee);
nir_tex_instr *nir_tex_instr_create(nir_shader *shader, unsigned num_srcs);
nir_phi_instr *nir_phi_instr_create(nir_shader *shader);
nir_parallel_copy_instr *nir_parallel_copy_instr_create(nir_shader *shader);
nir_ssa_undef_instr *nir_ssa_undef_instr_create(nir_shader *shader,
unsigned num_components,
unsigned bit_size);
nir_deref_var *nir_deref_var_create(void *mem_ctx, nir_variable *var);
nir_deref_array *nir_deref_array_create(void *mem_ctx);
nir_deref_struct *nir_deref_struct_create(void *mem_ctx, unsigned field_index);
nir_deref *nir_copy_deref(void *mem_ctx, nir_deref *deref);
nir_load_const_instr *
nir_deref_get_const_initializer_load(nir_shader *shader, nir_deref_var *deref);
/**
* NIR Cursors and Instruction Insertion API
* @{
*
* A tiny struct representing a point to insert/extract instructions or
* control flow nodes. Helps reduce the combinatorial explosion of possible
* points to insert/extract.
*
* \sa nir_control_flow.h
*/
typedef enum {
nir_cursor_before_block,
nir_cursor_after_block,
nir_cursor_before_instr,
nir_cursor_after_instr,
} nir_cursor_option;
typedef struct {
nir_cursor_option option;
union {
nir_block *block;
nir_instr *instr;
};
} nir_cursor;
static inline nir_block *
nir_cursor_current_block(nir_cursor cursor)
{
if (cursor.option == nir_cursor_before_instr ||
cursor.option == nir_cursor_after_instr) {
return cursor.instr->block;
} else {
return cursor.block;
}
}
bool nir_cursors_equal(nir_cursor a, nir_cursor b);
static inline nir_cursor
nir_before_block(nir_block *block)
{
nir_cursor cursor;
cursor.option = nir_cursor_before_block;
cursor.block = block;
return cursor;
}
static inline nir_cursor
nir_after_block(nir_block *block)
{
nir_cursor cursor;
cursor.option = nir_cursor_after_block;
cursor.block = block;
return cursor;
}
static inline nir_cursor
nir_before_instr(nir_instr *instr)
{
nir_cursor cursor;
cursor.option = nir_cursor_before_instr;
cursor.instr = instr;
return cursor;
}
static inline nir_cursor
nir_after_instr(nir_instr *instr)
{
nir_cursor cursor;
cursor.option = nir_cursor_after_instr;
cursor.instr = instr;
return cursor;
}
static inline nir_cursor
nir_after_block_before_jump(nir_block *block)
{
nir_instr *last_instr = nir_block_last_instr(block);
if (last_instr && last_instr->type == nir_instr_type_jump) {
return nir_before_instr(last_instr);
} else {
return nir_after_block(block);
}
}
static inline nir_cursor
nir_before_cf_node(nir_cf_node *node)
{
if (node->type == nir_cf_node_block)
return nir_before_block(nir_cf_node_as_block(node));
return nir_after_block(nir_cf_node_as_block(nir_cf_node_prev(node)));
}
static inline nir_cursor
nir_after_cf_node(nir_cf_node *node)
{
if (node->type == nir_cf_node_block)
return nir_after_block(nir_cf_node_as_block(node));
return nir_before_block(nir_cf_node_as_block(nir_cf_node_next(node)));
}
static inline nir_cursor
nir_after_cf_node_and_phis(nir_cf_node *node)
{
if (node->type == nir_cf_node_block)
return nir_after_block(nir_cf_node_as_block(node));
nir_block *block = nir_cf_node_as_block(nir_cf_node_next(node));
assert(block->cf_node.type == nir_cf_node_block);
nir_foreach_instr(instr, block) {
if (instr->type != nir_instr_type_phi)
return nir_before_instr(instr);
}
return nir_after_block(block);
}
static inline nir_cursor
nir_before_cf_list(struct exec_list *cf_list)
{
nir_cf_node *first_node = exec_node_data(nir_cf_node,
exec_list_get_head(cf_list), node);
return nir_before_cf_node(first_node);
}
static inline nir_cursor
nir_after_cf_list(struct exec_list *cf_list)
{
nir_cf_node *last_node = exec_node_data(nir_cf_node,
exec_list_get_tail(cf_list), node);
return nir_after_cf_node(last_node);
}
/**
* Insert a NIR instruction at the given cursor.
*
* Note: This does not update the cursor.
*/
void nir_instr_insert(nir_cursor cursor, nir_instr *instr);
static inline void
nir_instr_insert_before(nir_instr *instr, nir_instr *before)
{
nir_instr_insert(nir_before_instr(instr), before);
}
static inline void
nir_instr_insert_after(nir_instr *instr, nir_instr *after)
{
nir_instr_insert(nir_after_instr(instr), after);
}
static inline void
nir_instr_insert_before_block(nir_block *block, nir_instr *before)
{
nir_instr_insert(nir_before_block(block), before);
}
static inline void
nir_instr_insert_after_block(nir_block *block, nir_instr *after)
{
nir_instr_insert(nir_after_block(block), after);
}
static inline void
nir_instr_insert_before_cf(nir_cf_node *node, nir_instr *before)
{
nir_instr_insert(nir_before_cf_node(node), before);
}
static inline void
nir_instr_insert_after_cf(nir_cf_node *node, nir_instr *after)
{
nir_instr_insert(nir_after_cf_node(node), after);
}
static inline void
nir_instr_insert_before_cf_list(struct exec_list *list, nir_instr *before)
{
nir_instr_insert(nir_before_cf_list(list), before);
}
static inline void
nir_instr_insert_after_cf_list(struct exec_list *list, nir_instr *after)
{
nir_instr_insert(nir_after_cf_list(list), after);
}
void nir_instr_remove(nir_instr *instr);
/** @} */
typedef bool (*nir_foreach_ssa_def_cb)(nir_ssa_def *def, void *state);
typedef bool (*nir_foreach_dest_cb)(nir_dest *dest, void *state);
typedef bool (*nir_foreach_src_cb)(nir_src *src, void *state);
bool nir_foreach_ssa_def(nir_instr *instr, nir_foreach_ssa_def_cb cb,
void *state);
bool nir_foreach_dest(nir_instr *instr, nir_foreach_dest_cb cb, void *state);
bool nir_foreach_src(nir_instr *instr, nir_foreach_src_cb cb, void *state);
nir_const_value *nir_src_as_const_value(nir_src src);
bool nir_src_is_dynamically_uniform(nir_src src);
bool nir_srcs_equal(nir_src src1, nir_src src2);
void nir_instr_rewrite_src(nir_instr *instr, nir_src *src, nir_src new_src);
void nir_instr_move_src(nir_instr *dest_instr, nir_src *dest, nir_src *src);
void nir_if_rewrite_condition(nir_if *if_stmt, nir_src new_src);
void nir_instr_rewrite_dest(nir_instr *instr, nir_dest *dest,
nir_dest new_dest);
void nir_ssa_dest_init(nir_instr *instr, nir_dest *dest,
unsigned num_components, unsigned bit_size,
const char *name);
void nir_ssa_def_init(nir_instr *instr, nir_ssa_def *def,
unsigned num_components, unsigned bit_size,
const char *name);
void nir_ssa_def_rewrite_uses(nir_ssa_def *def, nir_src new_src);
void nir_ssa_def_rewrite_uses_after(nir_ssa_def *def, nir_src new_src,
nir_instr *after_me);
uint8_t nir_ssa_def_components_read(nir_ssa_def *def);
/*
* finds the next basic block in source-code order, returns NULL if there is
* none
*/
nir_block *nir_block_cf_tree_next(nir_block *block);
/* Performs the opposite of nir_block_cf_tree_next() */
nir_block *nir_block_cf_tree_prev(nir_block *block);
/* Gets the first block in a CF node in source-code order */
nir_block *nir_cf_node_cf_tree_first(nir_cf_node *node);
/* Gets the last block in a CF node in source-code order */
nir_block *nir_cf_node_cf_tree_last(nir_cf_node *node);
/* Gets the next block after a CF node in source-code order */
nir_block *nir_cf_node_cf_tree_next(nir_cf_node *node);
/* Macros for loops that visit blocks in source-code order */
#define nir_foreach_block(block, impl) \
for (nir_block *block = nir_start_block(impl); block != NULL; \
block = nir_block_cf_tree_next(block))
#define nir_foreach_block_safe(block, impl) \
for (nir_block *block = nir_start_block(impl), \
*next = nir_block_cf_tree_next(block); \
block != NULL; \
block = next, next = nir_block_cf_tree_next(block))
#define nir_foreach_block_reverse(block, impl) \
for (nir_block *block = nir_impl_last_block(impl); block != NULL; \
block = nir_block_cf_tree_prev(block))
#define nir_foreach_block_reverse_safe(block, impl) \
for (nir_block *block = nir_impl_last_block(impl), \
*prev = nir_block_cf_tree_prev(block); \
block != NULL; \
block = prev, prev = nir_block_cf_tree_prev(block))
#define nir_foreach_block_in_cf_node(block, node) \
for (nir_block *block = nir_cf_node_cf_tree_first(node); \
block != nir_cf_node_cf_tree_next(node); \
block = nir_block_cf_tree_next(block))
/* If the following CF node is an if, this function returns that if.
* Otherwise, it returns NULL.
*/
nir_if *nir_block_get_following_if(nir_block *block);
nir_loop *nir_block_get_following_loop(nir_block *block);
void nir_index_local_regs(nir_function_impl *impl);
void nir_index_global_regs(nir_shader *shader);
void nir_index_ssa_defs(nir_function_impl *impl);
unsigned nir_index_instrs(nir_function_impl *impl);
void nir_index_blocks(nir_function_impl *impl);
void nir_print_shader(nir_shader *shader, FILE *fp);
void nir_print_shader_annotated(nir_shader *shader, FILE *fp, struct hash_table *errors);
void nir_print_instr(const nir_instr *instr, FILE *fp);
nir_shader *nir_shader_clone(void *mem_ctx, const nir_shader *s);
nir_function_impl *nir_function_impl_clone(const nir_function_impl *fi);
nir_constant *nir_constant_clone(const nir_constant *c, nir_variable *var);
nir_variable *nir_variable_clone(const nir_variable *c, nir_shader *shader);
#ifdef DEBUG
void nir_validate_shader(nir_shader *shader);
void nir_metadata_set_validation_flag(nir_shader *shader);
void nir_metadata_check_validation_flag(nir_shader *shader);
#include "util/debug.h"
static inline bool
should_clone_nir(void)
{
static int should_clone = -1;
if (should_clone < 0)
should_clone = env_var_as_boolean("NIR_TEST_CLONE", false);
return should_clone;
}
#else
static inline void nir_validate_shader(nir_shader *shader) { (void) shader; }
static inline void nir_metadata_set_validation_flag(nir_shader *shader) { (void) shader; }
static inline void nir_metadata_check_validation_flag(nir_shader *shader) { (void) shader; }
static inline bool should_clone_nir(void) { return false; }
#endif /* DEBUG */
#define _PASS(nir, do_pass) do { \
do_pass \
nir_validate_shader(nir); \
if (should_clone_nir()) { \
nir_shader *clone = nir_shader_clone(ralloc_parent(nir), nir); \
ralloc_free(nir); \
nir = clone; \
} \
} while (0)
#define NIR_PASS(progress, nir, pass, ...) _PASS(nir, \
nir_metadata_set_validation_flag(nir); \
if (pass(nir, ##__VA_ARGS__)) { \
progress = true; \
nir_metadata_check_validation_flag(nir); \
} \
)
#define NIR_PASS_V(nir, pass, ...) _PASS(nir, \
pass(nir, ##__VA_ARGS__); \
)
void nir_calc_dominance_impl(nir_function_impl *impl);
void nir_calc_dominance(nir_shader *shader);
nir_block *nir_dominance_lca(nir_block *b1, nir_block *b2);
bool nir_block_dominates(nir_block *parent, nir_block *child);
void nir_dump_dom_tree_impl(nir_function_impl *impl, FILE *fp);
void nir_dump_dom_tree(nir_shader *shader, FILE *fp);
void nir_dump_dom_frontier_impl(nir_function_impl *impl, FILE *fp);
void nir_dump_dom_frontier(nir_shader *shader, FILE *fp);
void nir_dump_cfg_impl(nir_function_impl *impl, FILE *fp);
void nir_dump_cfg(nir_shader *shader, FILE *fp);
int nir_gs_count_vertices(const nir_shader *shader);
bool nir_split_var_copies(nir_shader *shader);
bool nir_lower_returns_impl(nir_function_impl *impl);
bool nir_lower_returns(nir_shader *shader);
bool nir_inline_functions(nir_shader *shader);
bool nir_propagate_invariant(nir_shader *shader);
void nir_lower_var_copy_instr(nir_intrinsic_instr *copy, void *mem_ctx);
void nir_lower_var_copies(nir_shader *shader);
bool nir_lower_global_vars_to_local(nir_shader *shader);
bool nir_lower_indirect_derefs(nir_shader *shader, nir_variable_mode modes);
bool nir_lower_locals_to_regs(nir_shader *shader);
void nir_lower_io_to_temporaries(nir_shader *shader, nir_function *entrypoint,
bool outputs, bool inputs);
void nir_shader_gather_info(nir_shader *shader, nir_function_impl *entrypoint);
void nir_assign_var_locations(struct exec_list *var_list, unsigned *size,
unsigned base_offset,
int (*type_size)(const struct glsl_type *));
void nir_lower_io(nir_shader *shader,
nir_variable_mode modes,
int (*type_size)(const struct glsl_type *));
nir_src *nir_get_io_offset_src(nir_intrinsic_instr *instr);
nir_src *nir_get_io_vertex_index_src(nir_intrinsic_instr *instr);
void nir_lower_io_types(nir_shader *shader);
void nir_lower_vars_to_ssa(nir_shader *shader);
bool nir_remove_dead_variables(nir_shader *shader, nir_variable_mode modes);
void nir_move_vec_src_uses_to_dest(nir_shader *shader);
bool nir_lower_vec_to_movs(nir_shader *shader);
void nir_lower_alu_to_scalar(nir_shader *shader);
void nir_lower_load_const_to_scalar(nir_shader *shader);
void nir_lower_phis_to_scalar(nir_shader *shader);
void nir_lower_samplers(nir_shader *shader,
const struct gl_shader_program *shader_program);
bool nir_lower_system_values(nir_shader *shader);
typedef struct nir_lower_tex_options {
/**
* bitmask of (1 << GLSL_SAMPLER_DIM_x) to control for which
* sampler types a texture projector is lowered.
*/
unsigned lower_txp;
/**
* If true, lower rect textures to 2D, using txs to fetch the
* texture dimensions and dividing the texture coords by the
* texture dims to normalize.
*/
bool lower_rect;
/**
* If true, convert yuv to rgb.
*/
unsigned lower_y_uv_external;
unsigned lower_y_u_v_external;
unsigned lower_yx_xuxv_external;
/**
* To emulate certain texture wrap modes, this can be used
* to saturate the specified tex coord to [0.0, 1.0]. The
* bits are according to sampler #, ie. if, for example:
*
* (conf->saturate_s & (1 << n))
*
* is true, then the s coord for sampler n is saturated.
*
* Note that clamping must happen *after* projector lowering
* so any projected texture sample instruction with a clamped
* coordinate gets automatically lowered, regardless of the
* 'lower_txp' setting.
*/
unsigned saturate_s;
unsigned saturate_t;
unsigned saturate_r;
/* Bitmask of textures that need swizzling.
*
* If (swizzle_result & (1 << texture_index)), then the swizzle in
* swizzles[texture_index] is applied to the result of the texturing
* operation.
*/
unsigned swizzle_result;
/* A swizzle for each texture. Values 0-3 represent x, y, z, or w swizzles
* while 4 and 5 represent 0 and 1 respectively.
*/
uint8_t swizzles[32][4];
/**
* Bitmap of textures that need srgb to linear conversion. If
* (lower_srgb & (1 << texture_index)) then the rgb (xyz) components
* of the texture are lowered to linear.
*/
unsigned lower_srgb;
} nir_lower_tex_options;
bool nir_lower_tex(nir_shader *shader,
const nir_lower_tex_options *options);
bool nir_lower_idiv(nir_shader *shader);
void nir_lower_clip_vs(nir_shader *shader, unsigned ucp_enables);
void nir_lower_clip_fs(nir_shader *shader, unsigned ucp_enables);
void nir_lower_two_sided_color(nir_shader *shader);
void nir_lower_clamp_color_outputs(nir_shader *shader);
void nir_lower_passthrough_edgeflags(nir_shader *shader);
typedef struct nir_lower_wpos_ytransform_options {
int state_tokens[5];
bool fs_coord_origin_upper_left :1;
bool fs_coord_origin_lower_left :1;
bool fs_coord_pixel_center_integer :1;
bool fs_coord_pixel_center_half_integer :1;
} nir_lower_wpos_ytransform_options;
bool nir_lower_wpos_ytransform(nir_shader *shader,
const nir_lower_wpos_ytransform_options *options);
bool nir_lower_wpos_center(nir_shader *shader);
typedef struct nir_lower_drawpixels_options {
int texcoord_state_tokens[5];
int scale_state_tokens[5];
int bias_state_tokens[5];
unsigned drawpix_sampler;
unsigned pixelmap_sampler;
bool pixel_maps :1;
bool scale_and_bias :1;
} nir_lower_drawpixels_options;
void nir_lower_drawpixels(nir_shader *shader,
const nir_lower_drawpixels_options *options);
typedef struct nir_lower_bitmap_options {
unsigned sampler;
bool swizzle_xxxx;
} nir_lower_bitmap_options;
void nir_lower_bitmap(nir_shader *shader, const nir_lower_bitmap_options *options);
void nir_lower_atomics(nir_shader *shader,
const struct gl_shader_program *shader_program);
void nir_lower_to_source_mods(nir_shader *shader);
bool nir_lower_gs_intrinsics(nir_shader *shader);
typedef enum {
nir_lower_drcp = (1 << 0),
nir_lower_dsqrt = (1 << 1),
nir_lower_drsq = (1 << 2),
nir_lower_dtrunc = (1 << 3),
nir_lower_dfloor = (1 << 4),
nir_lower_dceil = (1 << 5),
nir_lower_dfract = (1 << 6),
nir_lower_dround_even = (1 << 7),
nir_lower_dmod = (1 << 8)
} nir_lower_doubles_options;
void nir_lower_doubles(nir_shader *shader, nir_lower_doubles_options options);
void nir_lower_double_pack(nir_shader *shader);
bool nir_normalize_cubemap_coords(nir_shader *shader);
void nir_live_ssa_defs_impl(nir_function_impl *impl);
bool nir_ssa_defs_interfere(nir_ssa_def *a, nir_ssa_def *b);
void nir_convert_to_ssa_impl(nir_function_impl *impl);
void nir_convert_to_ssa(nir_shader *shader);
bool nir_repair_ssa_impl(nir_function_impl *impl);
bool nir_repair_ssa(nir_shader *shader);
/* If phi_webs_only is true, only convert SSA values involved in phi nodes to
* registers. If false, convert all values (even those not involved in a phi
* node) to registers.
*/
void nir_convert_from_ssa(nir_shader *shader, bool phi_webs_only);
bool nir_opt_algebraic(nir_shader *shader);
bool nir_opt_algebraic_late(nir_shader *shader);
bool nir_opt_constant_folding(nir_shader *shader);
bool nir_opt_global_to_local(nir_shader *shader);
bool nir_copy_prop(nir_shader *shader);
bool nir_opt_cse(nir_shader *shader);
bool nir_opt_dce(nir_shader *shader);
bool nir_opt_dead_cf(nir_shader *shader);
void nir_opt_gcm(nir_shader *shader);
bool nir_opt_peephole_select(nir_shader *shader);
bool nir_opt_remove_phis(nir_shader *shader);
bool nir_opt_undef(nir_shader *shader);
void nir_sweep(nir_shader *shader);
nir_intrinsic_op nir_intrinsic_from_system_value(gl_system_value val);
gl_system_value nir_system_value_from_intrinsic(nir_intrinsic_op intrin);
#ifdef __cplusplus
} /* extern "C" */
#endif
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