diff --git a/lib/Archive/Archive.cpp b/lib/Archive/Archive.cpp
index 4f100f7..54c715c 100644
--- a/lib/Archive/Archive.cpp
+++ b/lib/Archive/Archive.cpp
@@ -233,15 +233,14 @@
 }
 
 Module*
-llvm::GetBitcodeSymbols(const unsigned char *BufPtr, unsigned Length,
+llvm::GetBitcodeSymbols(const char *BufPtr, unsigned Length,
                         const std::string& ModuleID,
                         LLVMContext& Context,
                         std::vector<std::string>& symbols,
                         std::string* ErrMsg) {
   // Get the module.
   std::auto_ptr<MemoryBuffer> Buffer(
-    MemoryBuffer::getNewMemBuffer(Length, ModuleID.c_str()));
-  memcpy(const_cast<char *>(Buffer->getBufferStart()), BufPtr, Length);
+    MemoryBuffer::getMemBufferCopy(StringRef(BufPtr, Length),ModuleID.c_str()));
   
   Module *M = ParseBitcodeFile(Buffer.get(), Context, ErrMsg);
   if (!M)
diff --git a/lib/Archive/ArchiveInternals.h b/lib/Archive/ArchiveInternals.h
index baea544..08f20e7 100644
--- a/lib/Archive/ArchiveInternals.h
+++ b/lib/Archive/ArchiveInternals.h
@@ -77,7 +77,7 @@
                           std::vector<std::string>& symbols,
                           std::string* ErrMsg);
   
-  Module* GetBitcodeSymbols(const unsigned char*Buffer,unsigned Length,
+  Module* GetBitcodeSymbols(const char *Buffer, unsigned Length,
                             const std::string& ModuleID,
                             LLVMContext& Context,
                             std::vector<std::string>& symbols,
diff --git a/lib/Archive/ArchiveReader.cpp b/lib/Archive/ArchiveReader.cpp
index cbd0bb3..05d32de 100644
--- a/lib/Archive/ArchiveReader.cpp
+++ b/lib/Archive/ArchiveReader.cpp
@@ -348,9 +348,8 @@
       std::string FullMemberName = archPath.str() +
         "(" + I->getPath().str() + ")";
       MemoryBuffer *Buffer =
-        MemoryBuffer::getNewMemBuffer(I->getSize(), FullMemberName.c_str());
-      memcpy(const_cast<char *>(Buffer->getBufferStart()),
-             I->getData(), I->getSize());
+        MemoryBuffer::getMemBufferCopy(StringRef(I->getData(), I->getSize()),
+                                       FullMemberName.c_str());
       
       Module *M = ParseBitcodeFile(Buffer, Context, ErrMessage);
       delete Buffer;
@@ -488,10 +487,9 @@
   // Now, load the bitcode module to get the Module.
   std::string FullMemberName = archPath.str() + "(" +
     mbr->getPath().str() + ")";
-  MemoryBuffer *Buffer =MemoryBuffer::getNewMemBuffer(mbr->getSize(),
-                                                      FullMemberName.c_str());
-  memcpy(const_cast<char *>(Buffer->getBufferStart()),
-         mbr->getData(), mbr->getSize());
+  MemoryBuffer *Buffer =
+    MemoryBuffer::getMemBufferCopy(StringRef(mbr->getData(), mbr->getSize()),
+                                   FullMemberName.c_str());
   
   Module *m = getLazyBitcodeModule(Buffer, Context, ErrMsg);
   if (!m)
@@ -540,8 +538,8 @@
         std::string FullMemberName = archPath.str() + "(" +
           mbr->getPath().str() + ")";
         Module* M = 
-          GetBitcodeSymbols((const unsigned char*)At, mbr->getSize(),
-                            FullMemberName, Context, symbols, error);
+          GetBitcodeSymbols(At, mbr->getSize(), FullMemberName, Context,
+                            symbols, error);
 
         if (M) {
           // Insert the module's symbols into the symbol table
@@ -618,9 +616,8 @@
       archPath.str() + "(" + I->getPath().str() + ")";
 
     MemoryBuffer *Buffer =
-      MemoryBuffer::getNewMemBuffer(I->getSize(), FullMemberName.c_str());
-    memcpy(const_cast<char *>(Buffer->getBufferStart()),
-           I->getData(), I->getSize());
+      MemoryBuffer::getMemBufferCopy(StringRef(I->getData(), I->getSize()),
+                                     FullMemberName.c_str());
     Module *M = ParseBitcodeFile(Buffer, Context);
     delete Buffer;
     if (!M)
diff --git a/lib/Archive/ArchiveWriter.cpp b/lib/Archive/ArchiveWriter.cpp
index a02601a..21d4f65 100644
--- a/lib/Archive/ArchiveWriter.cpp
+++ b/lib/Archive/ArchiveWriter.cpp
@@ -226,8 +226,7 @@
     std::string FullMemberName = archPath.str() + "(" + member.getPath().str()
       + ")";
     Module* M = 
-      GetBitcodeSymbols((const unsigned char*)data,fSize,
-                        FullMemberName, Context, symbols, ErrMsg);
+      GetBitcodeSymbols(data, fSize, FullMemberName, Context, symbols, ErrMsg);
 
     // If the bitcode parsed successfully
     if ( M ) {