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// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef RCC_CODEGEN_SPILLER_H
#define RCC_CODEGEN_SPILLER_H
#include "rcc/CodeGen/LiveRangeEdit.h"
#include "rcc/CodeGen/TargetRegisterAllocationInfo.h"
#include <optional>
#include <vector>
namespace rcc {
class MachineActionReplay;
class Spiller final {
public:
Spiller(MachineFunction &Function, const TargetDescription &Target,
const TargetRegisterAllocationInfo &TargetInfo, VirtRegMap &Mapping,
bool EnableRematerialization = true, MachineActionReplay *Actions = nullptr)
: Function(&Function), Target(&Target), TargetInfo(&TargetInfo), Mapping(&Mapping),
Edit(Function, Target, Mapping), EnableRematerialization(EnableRematerialization),
Actions(Actions) {}
[[nodiscard]] Expected<std::vector<Register>> spill(Register VirtualReg);
private:
[[nodiscard]] Expected<std::vector<Register>> spillAtInstructions(Register VirtualReg);
[[nodiscard]] Expected<void> spillLiveIn(Register VirtualReg, RegisterClassID Class,
FrameIndex StackSlot);
[[nodiscard]] Expected<std::optional<std::vector<Register>>>
tryRematerialize(Register VirtualReg);
MachineFunction *Function;
const TargetDescription *Target;
const TargetRegisterAllocationInfo *TargetInfo;
VirtRegMap *Mapping;
LiveRangeEdit Edit;
bool EnableRematerialization;
MachineActionReplay *Actions;
};
} // namespace rcc
#endif // RCC_CODEGEN_SPILLER_H
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