llvm/utils/TableGen/Common/GlobalISel/CombinerUtils.cpp

   1 //===- CombinerUtils.cpp --------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "CombinerUtils.h"
  10 #include "llvm/ADT/StringSet.h"
  11
  12 namespace llvm {
  13
  14 StringRef insertStrRef(StringRef S) {
  15   if (S.empty())
  16     return {};
  17
  18   static StringSet<> Pool;
  19   auto [It, Inserted] = Pool.insert(S);
  20   return It->getKey();
  21 }
  22
  23 } // namespace llvm