-/// A helper class used with CloneAndPruneIntoFromInst to change the default
-/// behavior while instructions are being cloned.
-class CloningDirector {
-public:
- /// This enumeration describes the way CloneAndPruneIntoFromInst should
- /// proceed after the CloningDirector has examined an instruction.
- enum CloningAction {
- ///< Continue cloning the instruction (default behavior).
- CloneInstruction,
- ///< Skip this instruction but continue cloning the current basic block.
- SkipInstruction,
- ///< Skip this instruction and stop cloning the current basic block.
- StopCloningBB,
- ///< Don't clone the terminator but clone the current block's successors.
- CloneSuccessors
- };
-
- virtual ~CloningDirector() {}
-
- /// Subclasses must override this function to customize cloning behavior.
- virtual CloningAction handleInstruction(ValueToValueMapTy &VMap,
- const Instruction *Inst,
- BasicBlock *NewBB) = 0;
-
- virtual ValueMapTypeRemapper *getTypeRemapper() { return nullptr; }
- virtual ValueMaterializer *getValueMaterializer() { return nullptr; }
-};
-