Hide two unused debugging methods, NFCI.

GCC correctly moans that PlainCFGBuilder::isExternalDef(llvm::Value*) and
StackSafetyDataFlowAnalysis::verifyFixedPoint() are defined but not used
in Release builds. Hide them behind 'ifndef NDEBUG'.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@355205 91177308-0d34-0410-b5e6-96231b3b80d8

Author: hahnjo

lib/Analysis/StackSafetyAnalysis.cpp

@@ -415,7 +415,9 @@ class StackSafetyDataFlowAnalysis {
       updateOneNode(F.first, F.second);
   }
   void runDataFlow();
+#ifndef NDEBUG
   void verifyFixedPoint();
+#endif
 
 public:
   StackSafetyDataFlowAnalysis(
@@ -526,11 +528,13 @@ void StackSafetyDataFlowAnalysis::runDataFlow() {
   }
 }
 
+#ifndef NDEBUG
 void StackSafetyDataFlowAnalysis::verifyFixedPoint() {
   WorkList.clear();
   updateAllNodes();
   assert(WorkList.empty());
 }
+#endif
 
 StackSafetyGlobalInfo StackSafetyDataFlowAnalysis::run() {
   runDataFlow();

lib/Transforms/Vectorize/VPlanHCFGBuilder.cpp

@@ -63,7 +63,9 @@ class PlainCFGBuilder {
   void setVPBBPredsFromBB(VPBasicBlock *VPBB, BasicBlock *BB);
   void fixPhiNodes();
   VPBasicBlock *getOrCreateVPBB(BasicBlock *BB);
+#ifndef NDEBUG
   bool isExternalDef(Value *Val);
+#endif
   VPValue *getOrCreateVPOperand(Value *IRVal);
   void createVPInstructionsForVPBB(VPBasicBlock *VPBB, BasicBlock *BB);
 
@@ -118,6 +120,7 @@ VPBasicBlock *PlainCFGBuilder::getOrCreateVPBB(BasicBlock *BB) {
   return VPBB;
 }
 
+#ifndef NDEBUG
 // Return true if \p Val is considered an external definition. An external
 // definition is either:
 // 1. A Value that is not an Instruction. This will be refined in the future.
@@ -153,6 +156,7 @@ bool PlainCFGBuilder::isExternalDef(Value *Val) {
   // Check whether Instruction definition is in loop body.
   return !TheLoop->contains(Inst);
 }
+#endif
 
 // Create a new VPValue or retrieve an existing one for the Instruction's
 // operand \p IRVal. This function must only be used to create/retrieve VPValues