[llvm] Use StringRef::operator== instead of StringRef::equals (NFC) (#91441)

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

- StringRef::operator==/!= outnumber StringRef::equals by a factor of
  70 under llvm/ 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, 3 insertions, 3 deletions

diff --git a/llvm/unittests/ADT/StringRefTest.cpp b/llvm/unittests/ADT/StringRefTest.cpp
index fa537e8..b3c206a 100644
--- a/llvm/unittests/ADT/StringRefTest.cpp
+++ b/llvm/unittests/ADT/StringRefTest.cpp
@@ -998,7 +998,7 @@ TEST(StringRefTest, AllocatorCopy) {
   // allocator.
   StringRef StrEmpty = "";
   StringRef StrEmptyc = StrEmpty.copy(Alloc);
-  EXPECT_TRUE(StrEmpty.equals(StrEmptyc));
+  EXPECT_TRUE(StrEmpty == StrEmptyc);
   EXPECT_EQ(StrEmptyc.data(), nullptr);
   EXPECT_EQ(StrEmptyc.size(), 0u);
   EXPECT_EQ(Alloc.getTotalMemory(), 0u);
@@ -1007,9 +1007,9 @@ TEST(StringRefTest, AllocatorCopy) {
   StringRef Str2 = "bye";
   StringRef Str1c = Str1.copy(Alloc);
   StringRef Str2c = Str2.copy(Alloc);
-  EXPECT_TRUE(Str1.equals(Str1c));
+  EXPECT_TRUE(Str1 == Str1c);
   EXPECT_NE(Str1.data(), Str1c.data());
-  EXPECT_TRUE(Str2.equals(Str2c));
+  EXPECT_TRUE(Str2 == Str2c);
   EXPECT_NE(Str2.data(), Str2c.data());
 }