mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
4473c4ce87
Summary: Passing a nullptr to memcpy is UB. Reviewers: ioeric Subscribers: llvm-commits, cfe-commits Differential Revision: https://reviews.llvm.org/D50966 llvm-svn: 340170
28 lines
854 B
C++
28 lines
854 B
C++
//===-- StringSaver.cpp ---------------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Support/StringSaver.h"
|
|
|
|
using namespace llvm;
|
|
|
|
StringRef StringSaver::save(StringRef S) {
|
|
char *P = Alloc.Allocate<char>(S.size() + 1);
|
|
if (!S.empty())
|
|
memcpy(P, S.data(), S.size());
|
|
P[S.size()] = '\0';
|
|
return StringRef(P, S.size());
|
|
}
|
|
|
|
StringRef UniqueStringSaver::save(StringRef S) {
|
|
auto R = Unique.insert(S);
|
|
if (R.second) // cache miss, need to actually save the string
|
|
*R.first = Strings.save(S); // safe replacement with equal value
|
|
return *R.first;
|
|
}
|