Add StringRef::endswith

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78197 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/ADT/StringRef.h

@@ -174,6 +174,11 @@ namespace llvm {
       return substr(0, Prefix.Length).equals(Prefix);
     }
 
+    /// endswith - Check if this string ends with the given \arg Suffix.
+    bool endswith(const StringRef &Suffix) const {
+      return slice(size() - Suffix.Length, size()).equals(Suffix);
+    }
+
     /// @}
   };