[AsmPrinter] Use StringRef::starts_with/ends_with instead of startswith/endswith. NFC.

startswith/endswith wrap starts_with/ends_with and will eventually go away (to more closely match string_view)

Author: RKSimon

llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp

@@ -2389,7 +2389,8 @@ bool AsmPrinter::doFinalization(Module &M) {
     OutStreamer->emitAddrsig();
     for (const GlobalValue &GV : M.global_values()) {
       if (!GV.use_empty() && !GV.isThreadLocal() &&
-          !GV.hasDLLImportStorageClass() && !GV.getName().startswith("llvm.") &&
+          !GV.hasDLLImportStorageClass() &&
+          !GV.getName().starts_with("llvm.") &&
           !GV.hasAtLeastLocalUnnamedAddr())
         OutStreamer->emitAddrsigSym(getSymbol(&GV));
     }

llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp

@@ -142,7 +142,7 @@ StringRef CodeViewDebug::getFullFilepath(const DIFile *File) {
 
   // If this is a Unix-style path, just use it as is. Don't try to canonicalize
   // it textually because one of the path components could be a symlink.
-  if (Dir.startswith("/") || Filename.startswith("/")) {
+  if (Dir.starts_with("/") || Filename.starts_with("/")) {
     if (llvm::sys::path::is_absolute(Filename, llvm::sys::path::Style::posix))
       return Filename;
     Filepath = std::string(Dir);
@@ -910,10 +910,10 @@ static std::string flattenCommandLine(ArrayRef<std::string> Args,
       i++; // Skip this argument and next one.
       continue;
     }
-    if (Arg.startswith("-object-file-name") || Arg == MainFilename)
+    if (Arg.starts_with("-object-file-name") || Arg == MainFilename)
       continue;
     // Skip fmessage-length for reproduciability.
-    if (Arg.startswith("-fmessage-length"))
+    if (Arg.starts_with("-fmessage-length"))
       continue;
     if (PrintedOneArg)
       OS << " ";
@@ -2583,7 +2583,7 @@ CodeViewDebug::lowerRecordFieldList(const DICompositeType *Ty) {
 
     // Virtual function pointer member.
     if ((Member->getFlags() & DINode::FlagArtificial) &&
-        Member->getName().startswith("_vptr$")) {
+        Member->getName().starts_with("_vptr$")) {
       VFPtrRecord VFPR(getTypeIndex(Member->getBaseType()));
       ContinuationBuilder.writeMemberType(VFPR);
       MemberCount++;

llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp

@@ -445,7 +445,7 @@ DwarfDebug::DwarfDebug(AsmPrinter *A)
 DwarfDebug::~DwarfDebug() = default;
 
 static bool isObjCClass(StringRef Name) {
-  return Name.startswith("+") || Name.startswith("-");
+  return Name.starts_with("+") || Name.starts_with("-");
 }
 
 static bool hasObjCCategory(StringRef Name) {

llvm/lib/CodeGen/AsmPrinter/WinCFGuard.cpp

@@ -75,7 +75,7 @@ static bool isPossibleIndirectCallTarget(const Function *F) {
 }
 
 MCSymbol *WinCFGuard::lookupImpSymbol(const MCSymbol *Sym) {
-  if (Sym->getName().startswith("__imp_"))
+  if (Sym->getName().starts_with("__imp_"))
     return nullptr;
   return Asm->OutContext.lookupSymbol(Twine("__imp_") + Sym->getName());
 }