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comparison llvm/lib/Support/StringSaver.cpp @ 150:1d019706d866

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LLVM10
author anatofuz
date Thu, 13 Feb 2020 15:10:13 +0900
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children 1f2b6ac9f198
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147:c2174574ed3a 150:1d019706d866
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
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
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 }