diff options
Diffstat (limited to 'contrib/llvm-project/llvm/lib/Support/StringSaver.cpp')
-rw-r--r-- | contrib/llvm-project/llvm/lib/Support/StringSaver.cpp | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/Support/StringSaver.cpp b/contrib/llvm-project/llvm/lib/Support/StringSaver.cpp new file mode 100644 index 000000000000..f7ccfb97ea79 --- /dev/null +++ b/contrib/llvm-project/llvm/lib/Support/StringSaver.cpp @@ -0,0 +1,26 @@ +//===-- StringSaver.cpp ---------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#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; +} |