diff --git a/llvm/tools/llvm-mca/include/SourceMgr.h b/llvm/tools/llvm-mca/include/SourceMgr.h
index 8941283..e7cd358 100644
--- a/llvm/tools/llvm-mca/include/SourceMgr.h
+++ b/llvm/tools/llvm-mca/include/SourceMgr.h
@@ -27,7 +27,7 @@
 class SourceMgr {
   llvm::ArrayRef<llvm::MCInst> Sequence;
   unsigned Current;
-  unsigned Iterations;
+  const unsigned Iterations;
   static const unsigned DefaultIterations = 100;
 
 public:
@@ -35,27 +35,19 @@
       : Sequence(MCInstSequence), Current(0),
         Iterations(NumIterations ? NumIterations : DefaultIterations) {}
 
-  unsigned getCurrentIteration() const { return Current / Sequence.size(); }
   unsigned getNumIterations() const { return Iterations; }
   unsigned size() const { return Sequence.size(); }
-  llvm::ArrayRef<llvm::MCInst> getSequence() const { return Sequence; }
-
-  bool hasNext() const { return Current < (Iterations * size()); }
-  void updateNext() { Current++; }
+  bool hasNext() const { return Current < (Iterations * Sequence.size()); }
+  void updateNext() { ++Current; }
 
   const SourceRef peekNext() const {
     assert(hasNext() && "Already at end of sequence!");
-    unsigned Index = getCurrentInstructionIndex();
-    return SourceRef(Current, Sequence[Index]);
+    return SourceRef(Current, Sequence[Current % Sequence.size()]);
   }
 
-  unsigned getCurrentInstructionIndex() const {
-    return Current % Sequence.size();
-  }
-
-  const llvm::MCInst &getMCInstFromIndex(unsigned Index) const {
-    return Sequence[Index % size()];
-  }
+  using const_iterator = llvm::ArrayRef<llvm::MCInst>::const_iterator;
+  const_iterator begin() const { return Sequence.begin(); }
+  const_iterator end() const { return Sequence.end(); }
 
   bool isEmpty() const { return size() == 0; }
 };