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// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef RCC_CODEGEN_MACHINEFUNCTIONCLONER_H
#define RCC_CODEGEN_MACHINEFUNCTIONCLONER_H
#include "rcc/CodeGen/MachineIRTypes.h"
#include "rcc/CodeGen/Register.h"
#include "rcc/CodeGen/StableID.h"
#include "rcc/Support/Error.h"
#include <memory>
#include <optional>
#include <string>
#include <unordered_map>
namespace rcc {
class MachineBasicBlock;
class MachineFunction;
class MachineInstr;
class TargetDescription;
struct MachineFunctionCloneOptions final {
MachineFunctionStableID NewStableID;
std::optional<std::string> NewName;
};
struct MachineFunctionCloneResult final {
MachineFunctionCloneResult();
MachineFunctionCloneResult(const MachineFunctionCloneResult &) = delete;
MachineFunctionCloneResult &operator=(const MachineFunctionCloneResult &) = delete;
MachineFunctionCloneResult(MachineFunctionCloneResult &&) noexcept;
MachineFunctionCloneResult &operator=(MachineFunctionCloneResult &&) noexcept;
~MachineFunctionCloneResult();
std::unique_ptr<MachineFunction> ClonedFunction;
std::unordered_map<MachineBlockStableID, MachineBlockStableID> BlockStableIDs;
std::unordered_map<MachineInstrStableID, MachineInstrStableID> InstructionStableIDs;
std::unordered_map<Register, Register> VirtualRegisters;
std::unordered_map<FrameIndex, FrameIndex> FrameIndices;
std::unordered_map<ConstantPoolIndex, ConstantPoolIndex> ConstantPoolIndices;
std::unordered_map<JumpTableIndex, JumpTableIndex> JumpTableIndices;
};
class MachineFunctionCloneContext final {
public:
[[nodiscard]] const MachineFunction &sourceFunction() const noexcept {
return Source;
}
[[nodiscard]] MachineFunction &destinationFunction() const noexcept {
return Destination;
}
[[nodiscard]] Expected<MachineBasicBlock *> mapBlock(const MachineBasicBlock &SourceBlock) const;
[[nodiscard]] Expected<MachineInstr *>
mapInstruction(const MachineInstr &SourceInstruction) const;
[[nodiscard]] Expected<MachineBlockStableID>
mapBlockStableID(MachineBlockStableID SourceID) const;
[[nodiscard]] Expected<MachineInstrStableID>
mapInstructionStableID(MachineInstrStableID SourceID) const;
[[nodiscard]] Expected<Register> mapRegister(Register SourceRegister) const;
[[nodiscard]] Expected<FrameIndex> mapFrameIndex(FrameIndex SourceIndex) const;
[[nodiscard]] Expected<ConstantPoolIndex>
mapConstantPoolIndex(ConstantPoolIndex SourceIndex) const;
[[nodiscard]] Expected<JumpTableIndex> mapJumpTableIndex(JumpTableIndex SourceIndex) const;
private:
MachineFunctionCloneContext(
const MachineFunction &Source, MachineFunction &Destination,
const MachineFunctionCloneResult &Result,
const std::unordered_map<const MachineBasicBlock *, MachineBasicBlock *> &Blocks,
const std::unordered_map<const MachineInstr *, MachineInstr *> &Instructions) noexcept
: Source(Source), Destination(Destination), Result(Result), Blocks(Blocks),
Instructions(Instructions) {}
const MachineFunction &Source;
MachineFunction &Destination;
const MachineFunctionCloneResult &Result;
const std::unordered_map<const MachineBasicBlock *, MachineBasicBlock *> &Blocks;
const std::unordered_map<const MachineInstr *, MachineInstr *> &Instructions;
friend Expected<MachineFunctionCloneResult>
cloneMachineFunction(const MachineFunction &Source, const TargetDescription &Target,
MachineFunctionCloneOptions Options);
};
[[nodiscard]] Expected<MachineFunctionCloneResult>
cloneMachineFunction(const MachineFunction &Source, const TargetDescription &Target,
MachineFunctionCloneOptions Options);
} // namespace rcc
#endif // RCC_CODEGEN_MACHINEFUNCTIONCLONER_H
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