Remove a redundant #ifndef and add an assertion string.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82991 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/LCSSA.cpp b/lib/Transforms/Utils/LCSSA.cpp
index b510262..48e6a17 100644
--- a/lib/Transforms/Utils/LCSSA.cpp
+++ b/lib/Transforms/Utils/LCSSA.cpp
@@ -90,10 +90,8 @@
 
     /// verifyAnalysis() - Verify loop nest.
     virtual void verifyAnalysis() const {
-#ifndef NDEBUG
       // Check the special guarantees that LCSSA makes.
-      assert(L->isLCSSAForm());
-#endif
+      assert(L->isLCSSAForm() && "LCSSA form not preserved!");
     }
 
     void getLoopValuesUsedOutsideLoop(Loop *L,