Return Changed from SplitPHIEdges rather than always returning true.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125726 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/PHIElimination.cpp b/lib/CodeGen/PHIElimination.cpp
index f59e4f1..169e226 100644
--- a/lib/CodeGen/PHIElimination.cpp
+++ b/lib/CodeGen/PHIElimination.cpp
@@ -423,5 +423,5 @@
       }
     }
   }
-  return true;
+  return Changed;
 }