Release build: guard dump functions with "ifndef NDEBUG"

No functional change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163339 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveVariables.cpp b/lib/CodeGen/LiveVariables.cpp
index 348ed3a..6c94690 100644
--- a/lib/CodeGen/LiveVariables.cpp
+++ b/lib/CodeGen/LiveVariables.cpp
@@ -65,6 +65,7 @@
 }
 
 void LiveVariables::VarInfo::dump() const {
+#ifndef NDEBUG
   dbgs() << "  Alive in blocks: ";
   for (SparseBitVector<>::iterator I = AliveBlocks.begin(),
            E = AliveBlocks.end(); I != E; ++I)
@@ -77,6 +78,7 @@
       dbgs() << "\n    #" << i << ": " << *Kills[i];
     dbgs() << "\n";
   }
+#endif
 }
 
 /// getVarInfo - Get (possibly creating) a VarInfo object for the given vreg.