There is only one register coalescer. Merge it into the base class and
remove the analysis group.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133899 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SplitKit.cpp b/lib/CodeGen/SplitKit.cpp
index bf27cc8..18f315a 100644
--- a/lib/CodeGen/SplitKit.cpp
+++ b/lib/CodeGen/SplitKit.cpp
@@ -122,7 +122,7 @@
   // Compute per-live block info.
   if (!calcLiveBlockInfo()) {
     // FIXME: calcLiveBlockInfo found inconsistencies in the live range.
-    // I am looking at you, SimpleRegisterCoalescing!
+    // I am looking at you, RegisterCoalescer!
     DidRepairRange = true;
     ++NumRepairs;
     DEBUG(dbgs() << "*** Fixing inconsistent live interval! ***\n");
@@ -165,7 +165,7 @@
     tie(Start, Stop) = LIS.getSlotIndexes()->getMBBRange(BI.MBB);
 
     // If the block contains no uses, the range must be live through. At one
-    // point, SimpleRegisterCoalescing could create dangling ranges that ended
+    // point, RegisterCoalescer could create dangling ranges that ended
     // mid-block.
     if (UseI == UseE || *UseI >= Stop) {
       ++NumThroughBlocks;