Use StringRef::operator== instead of StringRef::equals (NFC) (#91864)

I'm planning to remove StringRef::equals in favor of
StringRef::operator==.

- StringRef::operator==/!= outnumber StringRef::equals by a factor of
  276 under llvm-project/ in terms of their usage.

- The elimination of StringRef::equals brings StringRef closer to
  std::string_view, which has operator== but not equals.

- S == "foo" is more readable than S.equals("foo"), especially for
  !Long.Expression.equals("str") vs Long.Expression != "str".

1 files changed, 2 insertions, 2 deletions

diff --git a/flang/lib/Frontend/CompilerInvocation.cpp b/flang/lib/Frontend/CompilerInvocation.cpp
index 4318286..db7fd3c 100644
--- a/flang/lib/Frontend/CompilerInvocation.cpp
+++ b/flang/lib/Frontend/CompilerInvocation.cpp
@@ -883,7 +883,7 @@ static bool parseDialectArgs(CompilerInvocation &res, llvm::opt::ArgList &args,
 
   // -x cuda
   auto language = args.getLastArgValue(clang::driver::options::OPT_x);
-  if (language.equals("cuda")) {
+  if (language == "cuda") {
     res.getFrontendOpts().features.Enable(
         Fortran::common::LanguageFeature::CUDA);
   }
@@ -986,7 +986,7 @@ static bool parseDialectArgs(CompilerInvocation &res, llvm::opt::ArgList &args,
   if (args.hasArg(clang::driver::options::OPT_std_EQ)) {
     auto standard = args.getLastArgValue(clang::driver::options::OPT_std_EQ);
     // We only allow f2018 as the given standard
-    if (standard.equals("f2018")) {
+    if (standard == "f2018") {
       res.setEnableConformanceChecks();
     } else {
       const unsigned diagID =