Analysis: unique_ptr-ify DependenceAnalysis::depends

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216357 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/DependenceAnalysis.h

@@ -287,9 +287,9 @@ namespace llvm {
     /// The flag PossiblyLoopIndependent should be set by the caller
     /// if it appears that control flow can reach from Src to Dst
     /// without traversing a loop back edge.
-    Dependence *depends(Instruction *Src,
-                        Instruction *Dst,
-                        bool PossiblyLoopIndependent);
+    std::unique_ptr<Dependence> depends(Instruction *Src,
+                                        Instruction *Dst,
+                                        bool PossiblyLoopIndependent);
 
     /// getSplitIteration - Give a dependence that's splittable at some
     /// particular level, return the iteration that should be used to split