[llvm] Use StringRef::contains (NFC)

Author: kazutakahirata

llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp

@@ -1524,7 +1524,7 @@ void AsmPrinter::emitPCSections(const MachineFunction &MF) {
         const size_t OptStart = SecWithOpt.find('!'); // likely npos
         const StringRef Sec = SecWithOpt.substr(0, OptStart);
         const StringRef Opts = SecWithOpt.substr(OptStart); // likely empty
-        ConstULEB128 = Opts.find('C') != StringRef::npos;
+        ConstULEB128 = Opts.contains('C');
 #ifndef NDEBUG
         for (char O : Opts)
           assert((O == '!' || O == 'C') && "Invalid !pcsections options");

llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp

@@ -7488,7 +7488,7 @@ bool AArch64AsmParser::parseAuthExpr(const MCExpr *&Res, SMLoc &EndLoc) {
   // Look for '_sym@AUTH' ...
   if (Tok.is(AsmToken::Identifier) && Tok.getIdentifier().endswith("@AUTH")) {
     StringRef SymName = Tok.getIdentifier().drop_back(strlen("@AUTH"));
-    if (SymName.find('@') != StringRef::npos)
+    if (SymName.contains('@'))
       return TokError(
           "combination of @AUTH with other modifiers not supported");
     Res = MCSymbolRefExpr::create(Ctx.getOrCreateSymbol(SymName), Ctx);

llvm/tools/llvm-readobj/ELFDumper.cpp

@@ -5565,7 +5565,7 @@ static AMDGPUNote getAMDGPUNote(uint32_t NoteType, ArrayRef<uint8_t> Desc) {
     // FIXME: Metadata Verifier only works with AMDHSA.
     //  This is an ugly workaround to avoid the verifier for other MD
     //  formats (e.g. amdpal)
-    if (MsgPackString.find("amdhsa.") != StringRef::npos) {
+    if (MsgPackString.contains("amdhsa.")) {
       AMDGPU::HSAMD::V3::MetadataVerifier Verifier(true);
       if (!Verifier.verify(MsgPackDoc.getRoot()))
         MetadataString = "Invalid AMDGPU Metadata\n";

llvm/unittests/MC/DwarfLineTableHeaders.cpp

@@ -172,8 +172,8 @@ class DwarfLineTableHeaders : public ::testing::Test {
       Expected<StringRef> ContentsOrErr = Section.getContents();
       ASSERT_TRUE(static_cast<bool>(ContentsOrErr));
       StringRef Contents = *ContentsOrErr;
-      ASSERT_TRUE(Contents.find("dir") != StringRef::npos);
-      ASSERT_TRUE(Contents.find("file") != StringRef::npos);
+      ASSERT_TRUE(Contents.contains("dir"));
+      ASSERT_TRUE(Contents.contains("file"));
       ASSERT_TRUE(Contents.size() == 9);
       return;
     }