Refactor 'handleMove' code in live intervals. Clients of LiveIntervals won't see

any changes.

Internally this adds a private inner class HMEditor, to LiveIntervals. HMEditor provides
an API for updating live intervals when code is moved or bundled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150826 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/LiveIntervalAnalysis.h

@@ -391,6 +391,8 @@ namespace llvm {
 
     void printInstrs(raw_ostream &O) const;
     void dumpInstrs() const;
+
+    class HMEditor;
   };
 } // End llvm namespace