Pass LiveQueryResult by value

This makes the API a bit more natural to use and makes it easier to make
LiveRanges implementation details private.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192394 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveInterval.cpp b/lib/CodeGen/LiveInterval.cpp
index e231d27..f7b5d64 100644
--- a/lib/CodeGen/LiveInterval.cpp
+++ b/lib/CodeGen/LiveInterval.cpp
@@ -908,7 +908,7 @@
       Idx = LIS.getSlotIndexes()->getIndexBefore(MI);
     else
       Idx = LIS.getInstructionIndex(MI);
-    LiveRangeQuery LRQ(LI, Idx);
+    LiveQueryResult LRQ = LI.Query(Idx);
     const VNInfo *VNI = MO.readsReg() ? LRQ.valueIn() : LRQ.valueDefined();
     // In the case of an <undef> use that isn't tied to any def, VNI will be
     // NULL. If the use is tied to a def, VNI will be the defined value.