Turn on memdep's verifyRemoved() in an attempt to smoke out the cause of our gcc bootstrap miscompare.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123207 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/MemoryDependenceAnalysis.cpp b/lib/Analysis/MemoryDependenceAnalysis.cpp
index 8ac0a37..c80099c 100644
--- a/lib/Analysis/MemoryDependenceAnalysis.cpp
+++ b/lib/Analysis/MemoryDependenceAnalysis.cpp
@@ -1262,7 +1262,9 @@
   
   assert(!NonLocalDeps.count(RemInst) && "RemInst got reinserted?");
   AA->deleteValue(RemInst);
-  DEBUG(verifyRemoved(RemInst));
+#ifndef NDEBUG
+  verifyRemoved(RemInst);
+#endif
 }
 /// verifyRemoved - Verify that the specified instruction does not occur
 /// in our internal data structures.