Adjust Valuehandle to hold its operand directly in it.

llvm-svn: 19897
diff --git a/llvm/lib/Transforms/TransformInternals.h b/llvm/lib/Transforms/TransformInternals.h
index b5747c9..9b90fcc 100644
--- a/llvm/lib/Transforms/TransformInternals.h
+++ b/llvm/lib/Transforms/TransformInternals.h
@@ -59,6 +59,7 @@
 // 
 class ValueMapCache;
 class ValueHandle : public Instruction {
+  Use Op;
   ValueMapCache &Cache;
 public:
   ValueHandle(ValueMapCache &VMC, Value *V);