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 11using namespace llvm; 12 13StringRef 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 21StringRef 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