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// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef RCC_CODEGEN_TARGETREGISTERALLOCATIONINFO_H
#define RCC_CODEGEN_TARGETREGISTERALLOCATIONINFO_H
#include "rcc/CodeGen/LiveInterval.h"
#include "rcc/CodeGen/MachineFrameInfo.h"
#include "rcc/CodeGen/TargetRegisterInfo.h"
#include <cstdint>
namespace rcc {
class MachineIRBuilder;
class MachineInstr;
class TargetDescription;
class TargetRegisterAllocationInfo {
public:
virtual ~TargetRegisterAllocationInfo() = default;
[[nodiscard]] virtual Expected<void>
validateSpillReload(RegisterClassID Class, const TargetDescription &Target) const = 0;
[[nodiscard]] virtual Expected<MachineInstr *>
emitReload(MachineIRBuilder &Builder, Register Destination, RegisterClassID Class,
FrameIndex StackSlot, LaneMask Lanes) const = 0;
[[nodiscard]] virtual Expected<MachineInstr *> emitSpill(MachineIRBuilder &Builder,
Register Source, RegisterClassID Class,
FrameIndex StackSlot,
LaneMask Lanes) const = 0;
[[nodiscard]] virtual Expected<bool> isRematerializable(const MachineInstr &, Register,
const MachineFunction &,
const TargetDescription &) const {
return false;
}
[[nodiscard]] virtual Expected<MachineInstr *> rematerialize(MachineIRBuilder &,
const MachineInstr &, Register,
Register,
const TargetDescription &) const {
return makeUnexpected(ErrorCode::InternalError,
"target accepted rematerialization without implementing it");
}
[[nodiscard]] virtual std::uint64_t physicalRegisterCost(const MachineFunction &, Register,
PhysicalRegister, RegisterClassID,
bool) const noexcept {
return 0;
}
[[nodiscard]] virtual std::uint64_t spillCost(const MachineFunction &, const LiveInterval &,
RegisterClassID) const noexcept {
return 1;
}
[[nodiscard]] virtual bool isReservedForFunction(const MachineFunction &, PhysicalRegister,
const TargetDescription &) const noexcept {
return false;
}
};
} // namespace rcc
#endif // RCC_CODEGEN_TARGETREGISTERALLOCATIONINFO_H
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