+ PHINode *getOrInsertCanonicalInductionVariable(const Loop *L, Type *Ty);
+
+ /// getIVIncOperand - Return the induction variable increment's IV operand.
+ Instruction *getIVIncOperand(Instruction *IncV, Instruction *InsertPos,
+ bool allowScale);
+
+ /// hoistIVInc - Utility for hoisting an IV increment.
+ bool hoistIVInc(Instruction *IncV, Instruction *InsertPos);
+
+ /// replaceCongruentIVs - replace congruent phis with their most canonical
+ /// representative. Return the number of phis eliminated.
+ unsigned replaceCongruentIVs(Loop *L, const DominatorTree *DT,
+ SmallVectorImpl<WeakVH> &DeadInsts,
+ const TargetLowering *TLI = NULL);