Convert the recent commits with DEBUG() => #ifndef NDEBUG. That is what they should really be using. I just had a thinko there.

Swift SVN r13279

lib/SILPasses/PredictableMemOpt.cpp

@@ -963,6 +963,9 @@ static void optimizeMemoryAllocations(SILFunction &Fn) {
 void swift::performSILPredictableMemoryOptimizations(SILModule *M) {
   for (auto &Fn : *M) {
     optimizeMemoryAllocations(Fn);
-    DEBUG(Fn.verify());
+
+#ifndef NDEBUG
+    Fn.verify();
+#endif
   }
 }