Rename LiveRange to LiveInterval::Segment

The Segment struct contains a single interval; multiple instances of this struct
are used to construct a live range, but the struct is not a live range by
itself.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192392 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/InlineSpiller.cpp b/lib/CodeGen/InlineSpiller.cpp
index 13db5f4..2ee6755 100644
--- a/lib/CodeGen/InlineSpiller.cpp
+++ b/lib/CodeGen/InlineSpiller.cpp
@@ -1295,8 +1295,8 @@
 
   assert(StackInt->getNumValNums() == 1 && "Bad stack interval values");
   for (unsigned i = 0, e = RegsToSpill.size(); i != e; ++i)
-    StackInt->MergeRangesInAsValue(LIS.getInterval(RegsToSpill[i]),
-                                   StackInt->getValNumInfo(0));
+    StackInt->MergeSegmentsInAsValue(LIS.getInterval(RegsToSpill[i]),
+                                     StackInt->getValNumInfo(0));
   DEBUG(dbgs() << "Merged spilled regs: " << *StackInt << '\n');
 
   // Spill around uses of all RegsToSpill.