From 82b10c3984a27f89b9a26f5753b2861c6a01e39c Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Mon, 6 Apr 2015 17:45:11 +0000
Subject: [PATCH] Prefer uninitialized memory for scratch space.

No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@234184 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Basic/SourceManager.cpp | 4 ++--
 lib/Lex/ScratchBuffer.cpp   | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/Basic/SourceManager.cpp b/lib/Basic/SourceManager.cpp
index 118e3f3200..c0b045331d 100644
--- a/lib/Basic/SourceManager.cpp
+++ b/lib/Basic/SourceManager.cpp
@@ -110,8 +110,8 @@ llvm::MemoryBuffer *ContentCache::getBuffer(DiagnosticsEngine &Diag,
   // possible.
   if (!BufferOrError) {
     StringRef FillStr("<<<MISSING SOURCE FILE>>>\n");
-    Buffer.setPointer(MemoryBuffer::getNewMemBuffer(ContentsEntry->getSize(),
-                                                    "<invalid>").release());
+    Buffer.setPointer(MemoryBuffer::getNewUninitMemBuffer(
+                          ContentsEntry->getSize(), "<invalid>").release());
     char *Ptr = const_cast<char*>(Buffer.getPointer()->getBufferStart());
     for (unsigned i = 0, e = ContentsEntry->getSize(); i != e; ++i)
       Ptr[i] = FillStr[i % FillStr.size()];
diff --git a/lib/Lex/ScratchBuffer.cpp b/lib/Lex/ScratchBuffer.cpp
index 3bac8891c6..42cfca73d3 100644
--- a/lib/Lex/ScratchBuffer.cpp
+++ b/lib/Lex/ScratchBuffer.cpp
@@ -65,7 +65,7 @@ void ScratchBuffer::AllocScratchBuffer(unsigned RequestLen) {
     RequestLen = ScratchBufSize;
 
   std::unique_ptr<llvm::MemoryBuffer> OwnBuf =
-      llvm::MemoryBuffer::getNewMemBuffer(RequestLen, "<scratch space>");
+      llvm::MemoryBuffer::getNewUninitMemBuffer(RequestLen, "<scratch space>");
   llvm::MemoryBuffer &Buf = *OwnBuf;
   FileID FID = SourceMgr.createFileID(std::move(OwnBuf));
   BufferStartLoc = SourceMgr.getLocForStartOfFile(FID);
-- 
2.40.0