class TargetInstrInfo;
class TargetRegisterClass;
template<typename T> class SmallVectorImpl;
+ template<typename T> class SSAUpdaterTraits;
+ class BumpPtrAllocator;
/// MachineSSAUpdater - This class updates SSA form for a set of virtual
/// registers defined in multiple blocks. This is used when code duplication
/// or another unstructured transformation wants to rewrite a set of uses of one
/// vreg with uses of a set of vregs.
class MachineSSAUpdater {
+ friend class SSAUpdaterTraits<MachineSSAUpdater>;
+
+private:
/// AvailableVals - This keeps track of which value to use on a per-block
/// basis. When we insert PHI nodes, we keep track of them here.
//typedef DenseMap<MachineBasicBlock*, unsigned > AvailableValsTy;
void *AV;
- /// IncomingPredInfo - We use this as scratch space when doing our recursive
- /// walk. This should only be used in GetValueInBlockInternal, normally it
- /// should be empty.
- //std::vector<std::pair<MachineBasicBlock*, unsigned > > IncomingPredInfo;
- void *IPI;
-
/// VR - Current virtual register whose uses are being updated.
unsigned VR;
private:
void ReplaceRegWith(unsigned OldReg, unsigned NewReg);
unsigned GetValueAtEndOfBlockInternal(MachineBasicBlock *BB);
+
void operator=(const MachineSSAUpdater&); // DO NOT IMPLEMENT
MachineSSAUpdater(const MachineSSAUpdater&); // DO NOT IMPLEMENT
};