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* Copyright 2018-2021 Arm Limited
* SPDX-License-Identifier: Apache-2.0 OR MIT
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
* At your option, you may choose to accept this material under either:
* 1. The Apache License, Version 2.0, found at <>, or
* 2. The MIT License, found at <>.
#include "spirv_common.hpp"
#include <stdint.h>
#include <unordered_map>
// This data structure holds all information needed to perform cross-compilation and reflection.
// It is the output of the Parser, but any implementation could create this structure.
// It is intentionally very "open" and struct-like with some helper functions to deal with decorations.
// Parser is the reference implementation of how this data structure should be filled in.
class ParsedIR
// This must be destroyed after the "ids" vector.
std::unique_ptr<ObjectPoolGroup> pool_group;
// Due to custom allocations from object pools, we cannot use a default copy constructor.
ParsedIR(const ParsedIR &other);
ParsedIR &operator=(const ParsedIR &other);
// Moves are unproblematic, but we need to implement it anyways, since MSVC 2013 does not understand
// how to default-implement these.
ParsedIR(ParsedIR &&other) SPIRV_CROSS_NOEXCEPT;
ParsedIR &operator=(ParsedIR &&other) SPIRV_CROSS_NOEXCEPT;
// Resizes ids, meta and block_meta.
void set_id_bounds(uint32_t bounds);
// The raw SPIR-V, instructions and opcodes refer to this by offset + count.
std::vector<uint32_t> spirv;
// Holds various data structures which inherit from IVariant.
SmallVector<Variant> ids;
// Various meta data for IDs, decorations, names, etc.
std::unordered_map<ID, Meta> meta;
// Holds all IDs which have a certain type.
// This is needed so we can iterate through a specific kind of resource quickly,
// and in-order of module declaration.
SmallVector<ID> ids_for_type[TypeCount];
// Special purpose lists which contain a union of types.
// This is needed so we can declare specialization constants and structs in an interleaved fashion,
// among other things.
// Constants can be undef or of struct type, and struct array sizes can use specialization constants.
SmallVector<ID> ids_for_constant_undef_or_type;
SmallVector<ID> ids_for_constant_or_variable;
// We need to keep track of the width the Ops that contains a type for the
// OpSwitch instruction, since this one doesn't contains the type in the
// instruction itself. And in some case we need to cast the condition to
// wider types. We only need the width to do the branch fixup since the
// type check itself can be done at runtime
std::unordered_map<ID, uint32_t> load_type_width;
// Declared capabilities and extensions in the SPIR-V module.
// Not really used except for reflection at the moment.
SmallVector<spv::Capability> declared_capabilities;
SmallVector<std::string> declared_extensions;
// Meta data about blocks. The cross-compiler needs to query if a block is either of these types.
// It is a bitset as there can be more than one tag per block.
enum BlockMetaFlagBits
using BlockMetaFlags = uint8_t;
SmallVector<BlockMetaFlags> block_meta;
std::unordered_map<BlockID, BlockID> continue_block_to_loop_header;
// Normally, we'd stick SPIREntryPoint in ids array, but it conflicts with SPIRFunction.
// Entry points can therefore be seen as some sort of meta structure.
std::unordered_map<FunctionID, SPIREntryPoint> entry_points;
FunctionID default_entry_point = 0;
struct Source
uint32_t version = 0;
bool es = false;
bool known = false;
bool hlsl = false;
Source() = default;
Source source;
spv::AddressingModel addressing_model = spv::AddressingModelMax;
spv::MemoryModel memory_model = spv::MemoryModelMax;
// Decoration handling methods.
// Can be useful for simple "raw" reflection.
// However, most members are here because the Parser needs most of these,
// and might as well just have the whole suite of decoration/name handling in one place.
void set_name(ID id, const std::string &name);
const std::string &get_name(ID id) const;
void set_decoration(ID id, spv::Decoration decoration, uint32_t argument = 0);
void set_decoration_string(ID id, spv::Decoration decoration, const std::string &argument);
bool has_decoration(ID id, spv::Decoration decoration) const;
uint32_t get_decoration(ID id, spv::Decoration decoration) const;
const std::string &get_decoration_string(ID id, spv::Decoration decoration) const;
const Bitset &get_decoration_bitset(ID id) const;
void unset_decoration(ID id, spv::Decoration decoration);
// Decoration handling methods (for members of a struct).
void set_member_name(TypeID id, uint32_t index, const std::string &name);
const std::string &get_member_name(TypeID id, uint32_t index) const;
void set_member_decoration(TypeID id, uint32_t index, spv::Decoration decoration, uint32_t argument = 0);
void set_member_decoration_string(TypeID id, uint32_t index, spv::Decoration decoration,
const std::string &argument);
uint32_t get_member_decoration(TypeID id, uint32_t index, spv::Decoration decoration) const;
const std::string &get_member_decoration_string(TypeID id, uint32_t index, spv::Decoration decoration) const;
bool has_member_decoration(TypeID id, uint32_t index, spv::Decoration decoration) const;
const Bitset &get_member_decoration_bitset(TypeID id, uint32_t index) const;
void unset_member_decoration(TypeID id, uint32_t index, spv::Decoration decoration);
void mark_used_as_array_length(ID id);
uint32_t increase_bound_by(uint32_t count);
Bitset get_buffer_block_flags(const SPIRVariable &var) const;
Bitset get_buffer_block_type_flags(const SPIRType &type) const;
void add_typed_id(Types type, ID id);
void remove_typed_id(Types type, ID id);
class LoopLock
explicit LoopLock(uint32_t *counter);
LoopLock(const LoopLock &) = delete;
void operator=(const LoopLock &) = delete;
LoopLock(LoopLock &&other) SPIRV_CROSS_NOEXCEPT;
LoopLock &operator=(LoopLock &&other) SPIRV_CROSS_NOEXCEPT;
uint32_t *lock;
// This must be held while iterating over a type ID array.
// It is undefined if someone calls set<>() while we're iterating over a data structure, so we must
// make sure that this case is avoided.
// If we have a hard lock, it is an error to call set<>(), and an exception is thrown.
// If we have a soft lock, we silently ignore any additions to the typed arrays.
// This should only be used for physical ID remapping where we need to create an ID, but we will never
// care about iterating over them.
LoopLock create_loop_hard_lock() const;
LoopLock create_loop_soft_lock() const;
template <typename T, typename Op>
void for_each_typed_id(const Op &op)
auto loop_lock = create_loop_hard_lock();
for (auto &id : ids_for_type[T::type])
if (ids[id].get_type() == static_cast<Types>(T::type))
op(id, get<T>(id));
template <typename T, typename Op>
void for_each_typed_id(const Op &op) const
auto loop_lock = create_loop_hard_lock();
for (auto &id : ids_for_type[T::type])
if (ids[id].get_type() == static_cast<Types>(T::type))
op(id, get<T>(id));
template <typename T>
void reset_all_of_type()
void reset_all_of_type(Types type);
Meta *find_meta(ID id);
const Meta *find_meta(ID id) const;
const std::string &get_empty_string() const
return empty_string;
void make_constant_null(uint32_t id, uint32_t type, bool add_to_typed_id_set);
void fixup_reserved_names();
static void sanitize_underscores(std::string &str);
static void sanitize_identifier(std::string &str, bool member, bool allow_reserved_prefixes);
static bool is_globally_reserved_identifier(std::string &str, bool allow_reserved_prefixes);
uint32_t get_spirv_version() const;
template <typename T>
T &get(uint32_t id)
return variant_get<T>(ids[id]);
template <typename T>
const T &get(uint32_t id) const
return variant_get<T>(ids[id]);
mutable uint32_t loop_iteration_depth_hard = 0;
mutable uint32_t loop_iteration_depth_soft = 0;
std::string empty_string;
Bitset cleared_bitset;
std::unordered_set<uint32_t> meta_needing_name_fixup;