1 //===-- StringSaver.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 "llvm/Support/StringSaver.h"
10 
11 using namespace llvm;
12 
save(StringRef S)13 StringRef StringSaver::save(StringRef S) {
14   char *P = Alloc.Allocate<char>(S.size() + 1);
15   if (!S.empty())
16     memcpy(P, S.data(), S.size());
17   P[S.size()] = '\0';
18   return StringRef(P, S.size());
19 }
20 
save(StringRef S)21 StringRef UniqueStringSaver::save(StringRef S) {
22   auto R = Unique.insert(S);
23   if (R.second)                 // cache miss, need to actually save the string
24     *R.first = Strings.save(S); // safe replacement with equal value
25   return *R.first;
26 }
27