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// Copyright (c) 2015-2016 The Khronos Group Inc.
//
// 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
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef LIBSPIRV_VAL_INSTRUCTION_H_
#define LIBSPIRV_VAL_INSTRUCTION_H_
#include <cstdint>
#include <functional>
#include <utility>
#include <vector>
#include "spirv-tools/libspirv.h"
#include "table.h"
namespace libspirv {
class BasicBlock;
class Function;
/// Wraps the spv_parsed_instruction struct along with use and definition of the
/// instruction's result id
class Instruction {
public:
explicit Instruction(const spv_parsed_instruction_t* inst,
Function* defining_function = nullptr,
BasicBlock* defining_block = nullptr);
/// Registers the use of the Instruction in instruction \p inst at \p index
void RegisterUse(const Instruction* inst, uint32_t index);
uint32_t id() const { return inst_.result_id; }
uint32_t type_id() const { return inst_.type_id; }
SpvOp opcode() const { return static_cast<SpvOp>(inst_.opcode); }
/// Returns the Function where the instruction was defined. nullptr if it was
/// defined outside of a Function
const Function* function() const { return function_; }
/// Returns the BasicBlock where the instruction was defined. nullptr if it
/// was defined outside of a BasicBlock
const BasicBlock* block() const { return block_; }
/// Returns a vector of pairs of all references to this instruction's result
/// id. The first element is the instruction in which this result id was
/// referenced and the second is the index of the word in that instruction
/// where this result id appeared
const std::vector<std::pair<const Instruction*, uint32_t>>& uses() const {
return uses_;
}
/// The word used to define the Instruction
uint32_t word(size_t index) const { return words_[index]; }
/// The words used to define the Instruction
const std::vector<uint32_t>& words() const { return words_; }
/// The operands of the Instruction
const std::vector<spv_parsed_operand_t>& operands() const {
return operands_;
}
private:
const std::vector<uint32_t> words_;
const std::vector<spv_parsed_operand_t> operands_;
spv_parsed_instruction_t inst_;
/// The function in which this instruction was declared
Function* function_;
/// The basic block in which this instruction was declared
BasicBlock* block_;
/// This is a vector of pairs of all references to this instruction's result
/// id. The first element is the instruction in which this result id was
/// referenced and the second is the index of the word in the referencing
/// instruction where this instruction appeared
std::vector<std::pair<const Instruction*, uint32_t>> uses_;
};
#define OPERATOR(OP) \
bool operator OP(const Instruction& lhs, const Instruction& rhs); \
bool operator OP(const Instruction& lhs, uint32_t rhs)
OPERATOR(<);
OPERATOR(==);
#undef OPERATOR
} // namespace libspirv
// custom specialization of std::hash for Instruction
namespace std {
template <>
struct hash<libspirv::Instruction> {
typedef libspirv::Instruction argument_type;
typedef std::size_t result_type;
result_type operator()(const argument_type& inst) const {
return hash<uint32_t>()(inst.id());
}
};
} /// namespace std
#endif // LIBSPIRV_VAL_INSTRUCTION_H_
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