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// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef RCC_CODEGEN_GLOBALISEL_CSEINFO_H
#define RCC_CODEGEN_GLOBALISEL_CSEINFO_H
#include "rcc/ADT/APInt.h"
#include "rcc/CodeGen/CSEConfigBase.h"
#include "rcc/CodeGen/CommandFlags.h"
#include "rcc/CodeGen/GlobalISel/GISelChangeObserver.h"
#include "rcc/CodeGen/GlobalISel/GISelWorkList.h"
#include "rcc/CodeGen/LowLevelType.h"
#include "rcc/CodeGen/MachineIRTypes.h"
#include "rcc/CodeGen/Register.h"
#include "rcc/Support/Error.h"
#include <cstddef>
#include <cstdint>
#include <memory>
#include <span>
#include <unordered_map>
#include <vector>
namespace rcc {
class MachineBasicBlock;
class MachineFunction;
class MachineInstr;
class MachineIRBuilderResult;
class CSEConfigFull final : public CSEConfigBase {
public:
[[nodiscard]] bool shouldCSEOpcode(Opcode InstructionOpcode) const noexcept override;
};
class CSEConfigConstantOnly final : public CSEConfigBase {
public:
[[nodiscard]] bool shouldCSEOpcode(Opcode InstructionOpcode) const noexcept override;
};
[[nodiscard]] std::unique_ptr<CSEConfigBase> getStandardCSEConfigForOpt(OptimizationLevel Level);
class GISelCSEInfo final : public GISelChangeObserver {
public:
GISelCSEInfo() = default;
GISelCSEInfo(const GISelCSEInfo &) = delete;
GISelCSEInfo &operator=(const GISelCSEInfo &) = delete;
~GISelCSEInfo() override = default;
void setCSEConfig(std::unique_ptr<CSEConfigBase> Config) noexcept;
[[nodiscard]] bool shouldCSE(Opcode InstructionOpcode) const noexcept;
[[nodiscard]] Expected<void> analyze(MachineFunction &Function);
[[nodiscard]] Expected<void> verify();
void releaseMemory() noexcept;
void erasingInstr(MachineInstr &Instruction) override;
void createdInstr(MachineInstr &Instruction) override;
void changingInstr(MachineInstr &Instruction) override;
void changedInstr(MachineInstr &Instruction) override;
private:
struct CSEKey final {
const MachineBasicBlock *Block = nullptr;
Opcode InstructionOpcode;
std::vector<std::uint64_t> Profile;
friend bool operator==(const CSEKey &, const CSEKey &) = default;
};
struct CSEKeyHash final {
[[nodiscard]] std::size_t operator()(const CSEKey &Key) const noexcept;
};
[[nodiscard]] Expected<void> appendRegisterProfile(std::vector<std::uint64_t> &Profile,
Register Reg, bool IsDefinition) const;
[[nodiscard]] Expected<void> appendResultProfile(std::vector<std::uint64_t> &Profile,
const MachineIRBuilderResult &Result) const;
[[nodiscard]] Expected<CSEKey> profileInstruction(const MachineInstr &Instruction) const;
[[nodiscard]] Expected<CSEKey> profileBuilderInstruction(
Opcode InstructionOpcode, std::span<const MachineIRBuilderResult> Destinations,
std::span<const Register> Sources, std::span<const std::int64_t> Immediates,
MachineInstrFlags Flags, const MachineBasicBlock &Block) const;
[[nodiscard]] Expected<CSEKey> profileConstant(const MachineIRBuilderResult &Destination,
const APInt &Value,
const MachineBasicBlock &Block) const;
void recordNewInstruction(MachineInstr &Instruction);
[[nodiscard]] Expected<void> handleRecordedInstruction(MachineInstr &Instruction);
[[nodiscard]] Expected<void> handleRecordedInstructions();
void handleRemoveInstruction(MachineInstr &Instruction) noexcept;
[[nodiscard]] Expected<void> insertInstruction(MachineInstr &Instruction);
[[nodiscard]] Expected<MachineInstr *> getMachineInstrIfExists(
Opcode InstructionOpcode, std::span<const MachineIRBuilderResult> Destinations,
std::span<const Register> Sources, std::span<const std::int64_t> Immediates,
MachineInstrFlags Flags, MachineBasicBlock &Block);
[[nodiscard]] Expected<MachineInstr *>
getConstantIfExists(const MachineIRBuilderResult &Destination, const APInt &Value,
MachineBasicBlock &Block);
void countOpcodeHit(Opcode InstructionOpcode) noexcept;
MachineFunction *Function = nullptr;
std::unique_ptr<CSEConfigBase> Config;
std::unordered_map<CSEKey, MachineInstr *, CSEKeyHash> CSEMap;
std::unordered_map<const MachineInstr *, CSEKey> InstructionMapping;
GISelWorkList<8> TemporaryInstructions;
std::unordered_map<std::uint32_t, std::size_t> OpcodeHitTable;
bool HandlingRecordedInstructions = false;
friend class CSEMIRBuilder;
};
} // namespace rcc
#endif // RCC_CODEGEN_GLOBALISEL_CSEINFO_H
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