Fix some incorrect logic in DominanceFrontier::splitBlock.  Part of 
PR4238.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72223 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Transforms/LoopSimplify/2004-04-13-LoopSimplifyUpdateDomFrontier.ll b/test/Transforms/LoopSimplify/2004-04-13-LoopSimplifyUpdateDomFrontier.ll
index 427631c..bd0515c 100644
--- a/test/Transforms/LoopSimplify/2004-04-13-LoopSimplifyUpdateDomFrontier.ll
+++ b/test/Transforms/LoopSimplify/2004-04-13-LoopSimplifyUpdateDomFrontier.ll
@@ -1,4 +1,4 @@
-; RUN: llvm-as < %s | opt -scalarrepl -loopsimplify -licm -disable-output
+; RUN: llvm-as < %s | opt -scalarrepl -loopsimplify -licm -disable-output -verify-dom-info
 
 define void @inflate() {
 entry: