[NFC][Instrumentation] Use Twine in createPrivateGlobalForString (#104726)

Author: vitalybuka

llvm/include/llvm/Transforms/Instrumentation.h

@@ -46,7 +46,7 @@ BasicBlock::iterator PrepareToSplitEntryBlock(BasicBlock &BB,
 // Create a constant for Str so that we can pass it to the run-time lib.
 GlobalVariable *createPrivateGlobalForString(Module &M, StringRef Str,
                                              bool AllowMerging,
-                                             const char *NamePrefix = "");
+                                             Twine NamePrefix = "");
 
 // Returns F.getComdat() if it exists.
 // Otherwise creates a new comdat, sets F's comdat, and returns it.

llvm/lib/Transforms/Instrumentation/Instrumentation.cpp

@@ -91,7 +91,7 @@ BasicBlock::iterator llvm::PrepareToSplitEntryBlock(BasicBlock &BB,
 // Create a constant for Str so that we can pass it to the run-time lib.
 GlobalVariable *llvm::createPrivateGlobalForString(Module &M, StringRef Str,
                                                    bool AllowMerging,
-                                                   const char *NamePrefix) {
+                                                   Twine NamePrefix) {
   Constant *StrConst = ConstantDataArray::getString(M.getContext(), Str);
   // We use private linkage for module-local strings. If they can be merged
   // with another one, we set the unnamed_addr attribute.