[LoopAccesses] If shouldRetryWithRuntimeCheck, reset InterestingDependences

When dependence analysis encounters a non-constant distance between
memory accesses it aborts the analysis and falls back to run-time checks
only.  In this case we weren't resetting the array of dependences.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237574 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/LoopAccessAnalysis.h

@@ -225,6 +225,8 @@ public:
     return RecordInterestingDependences ? &InterestingDependences : nullptr;
   }
 
+  void clearInterestingDependences() { InterestingDependences.clear(); }
+
   /// \brief The vector of memory access instructions.  The indices are used as
   /// instruction identifiers in the Dependence class.
   const SmallVectorImpl<Instruction *> &getMemoryInstructions() const {