MemoryBuffer now return an error_code and returns a OwningPtr<MemoryBuffer> via an out parm.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121958 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/CommandLine.cpp b/lib/Support/CommandLine.cpp
index e856509..373a1a2 100644
--- a/lib/Support/CommandLine.cpp
+++ b/lib/Support/CommandLine.cpp
@@ -464,11 +464,6 @@
       const sys::FileStatus *FileStat = respFile.getFileStatus();
       if (FileStat && FileStat->getSize() != 0) {
 
-        // Mmap the response file into memory.
-        error_code ec;
-        OwningPtr<MemoryBuffer>
-          respFilePtr(MemoryBuffer::getFile(respFile.c_str(), ec));
-
         // If we could open the file, parse its contents, otherwise
         // pass the @file option verbatim.
 
@@ -477,7 +472,9 @@
         // itself contain additional @file options; any such options will be
         // processed recursively.")
 
-        if (respFilePtr != 0) {
+        // Mmap the response file into memory.
+        OwningPtr<MemoryBuffer> respFilePtr;
+        if (!MemoryBuffer::getFile(respFile.c_str(), respFilePtr)) {
           ParseCStringVector(newArgv, respFilePtr->getBufferStart());
           continue;
         }