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// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef RCC_CODEGEN_MACHINECFGUPDATER_H
#define RCC_CODEGEN_MACHINECFGUPDATER_H
#include "rcc/CodeGen/MachineIRTypes.h"
#include "rcc/Support/Error.h"
namespace rcc {
class MachineBasicBlock;
class MachineFunction;
class MachineInstr;
class MachineCFGUpdater final {
public:
explicit MachineCFGUpdater(MachineFunction &Function) noexcept : Function(&Function) {}
[[nodiscard]] Expected<void>
addSuccessor(MachineBasicBlock &From, MachineBasicBlock &To,
BranchProbability Probability = BranchProbability::zero());
[[nodiscard]] Expected<void> removeSuccessor(MachineBasicBlock &From, MachineBasicBlock &To);
[[nodiscard]] Expected<void> replaceSuccessor(MachineBasicBlock &From,
MachineBasicBlock &OldTarget,
MachineBasicBlock &NewTarget);
[[nodiscard]] Expected<void> splitEdge(MachineBasicBlock &From, MachineBasicBlock &To,
MachineBasicBlock &EdgeBlock);
[[nodiscard]] Expected<void> updateBranchProbability(MachineBasicBlock &From,
MachineBasicBlock &To,
BranchProbability Probability);
[[nodiscard]] Expected<void> transferSuccessors(MachineBasicBlock &From, MachineBasicBlock &To);
[[nodiscard]] Expected<void> disconnectBlock(MachineBasicBlock &Block);
[[nodiscard]] Expected<MachineBasicBlock *> splitBlock(MachineBasicBlock &Block,
MachineInstr &SplitBefore);
[[nodiscard]] Expected<void> deleteBlock(MachineBasicBlock &Block);
private:
[[nodiscard]] Expected<void> verifyOwnership(const MachineBasicBlock &Block) const;
MachineFunction *Function;
};
} // namespace rcc
#endif // RCC_CODEGEN_MACHINECFGUPDATER_H
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