[SILDebugInfo] Only print under !NDEBUG. (#62325)

Author: nate-chandler

include/swift/SIL/SILDebugScope.h

@@ -88,10 +88,12 @@ class SILDebugScope : public SILAllocated<SILDebugScope> {
     return callSite;
   }
 
+#ifndef NDEBUG
   void print(SourceManager &SM, llvm::raw_ostream &OS = llvm::errs(),
              unsigned Indent = 0) const;
 
   void print(SILModule &Mod) const;
+#endif
 };
 
 /// Determine whether an instruction may not have a SILDebugScope.

lib/SIL/Verifier/SILVerifier.cpp

@@ -5845,12 +5845,16 @@ class SILVerifier : public SILVerifierBase<SILVerifier> {
       if (DS != LastSeenScope) {
         llvm::errs() << "Broken instruction!\n"; 
         SI.dump();
+#ifndef NDEBUG
         llvm::errs() << "in scope\n";
         DS->print(SI.getFunction()->getModule());
+#endif
         llvm::errs() << "Previous, non-contiguous scope set by";
         LastSeenScopeInst->dump();
+#ifndef NDEBUG
         llvm::errs() << "in scope\n";
         LastSeenScope->print(SI.getFunction()->getModule());
+#endif
         llvm::errs() << "Please report a bug on bugs.swift.org\n";
         llvm::errs() <<
           "Pass -Xllvm -verify-di-holes=false to disable the verification\n";