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[Lex] Use WritableMemoryBuffer in ScratchBuffer.cpp 

This avoids the need to const_cast the buffer contents to write to it.

NFCI.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@322268 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Pavel Labath 2018-01-11 10:43:45 +00:00
parent 43db18167d
commit 998ea35e9f
1 changed files with 4 additions and 4 deletions
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8
lib/Lex/ScratchBuffer.cpp
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@ -74,11 +74,11 @@ void ScratchBuffer::AllocScratchBuffer(unsigned RequestLen) {
// Get scratch buffer. Zero-initialize it so it can be dumped into a PCH file
// deterministically.
std::unique_ptr<llvm::MemoryBuffer> OwnBuf =
llvm::MemoryBuffer::getNewMemBuffer(RequestLen, "<scratch space>");
llvm::MemoryBuffer &Buf = *OwnBuf;
std::unique_ptr<llvm::WritableMemoryBuffer> OwnBuf =
llvm::WritableMemoryBuffer::getNewMemBuffer(RequestLen,
"<scratch space>");
CurBuffer = OwnBuf->getBufferStart();
FileID FID = SourceMgr.createFileID(std::move(OwnBuf));
BufferStartLoc = SourceMgr.getLocForStartOfFile(FID);
CurBuffer = const_cast<char*>(Buf.getBufferStart());
BytesUsed = 0;
}