Guard print() functions only used by dump() functions.

Summary:
Since  r293359, most dump() function are only defined when
`!defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)` holds. print() functions
only used by dump() functions are now unused in release builds,
generating lots of warnings. This patch only defines some print()
functions if they are used.

Reviewers: MatzeB

Reviewed By: MatzeB

Subscribers: arsenm, mzolotukhin, nhaehnle, llvm-commits

Differential Revision: https://reviews.llvm.org/D35949

llvm-svn: 309553

llvm/lib/CodeGen/LiveDebugVariables.cpp

@@ -365,6 +365,7 @@ static void printExtendedName(raw_ostream &OS, const DILocalVariable *V,
   }
 }
 
+#ifndef NDEBUG
 void UserValue::print(raw_ostream &OS, const TargetRegisterInfo *TRI) {
   auto *DV = cast<DILocalVariable>(Variable);
   OS << "!\"";
@@ -390,6 +391,7 @@ void LDVImpl::print(raw_ostream &OS) {
   for (unsigned i = 0, e = userValues.size(); i != e; ++i)
     userValues[i]->print(OS, TRI);
 }
+#endif
 
 void UserValue::coalesceLocation(unsigned LocNo) {
   unsigned KeepLoc = 0;