Remove some calls to std::move.

Instead of moving out the data in a ErrorOr<std::unique_ptr<Foo>>, get
a reference to it.

Thanks to David Blaikie for the suggestion.

llvm-svn: 214516

3 files changed, 13 insertions, 13 deletions

diff --git a/llvm/lib/Support/CommandLine.cpp b/llvm/lib/Support/CommandLine.cpp
index 586eceae757..4c1df5c47dd 100644
--- a/llvm/lib/Support/CommandLine.cpp
+++ b/llvm/lib/Support/CommandLine.cpp
@@ -635,11 +635,11 @@ static bool ExpandResponseFile(const char *FName, StringSaver &Saver,
       MemoryBuffer::getFile(FName);
   if (!MemBufOrErr)
     return false;
-  std::unique_ptr<MemoryBuffer> MemBuf = std::move(MemBufOrErr.get());
-  StringRef Str(MemBuf->getBufferStart(), MemBuf->getBufferSize());
+  MemoryBuffer &MemBuf = *MemBufOrErr.get();
+  StringRef Str(MemBuf.getBufferStart(), MemBuf.getBufferSize());
 
   // If we have a UTF-16 byte order mark, convert to UTF-8 for parsing.
-  ArrayRef<char> BufRef(MemBuf->getBufferStart(), MemBuf->getBufferEnd());
+  ArrayRef<char> BufRef(MemBuf.getBufferStart(), MemBuf.getBufferEnd());
   std::string UTF8Buf;
   if (hasUTF16ByteOrderMark(BufRef)) {
     if (!convertUTF16ToUTF8String(BufRef, UTF8Buf))
diff --git a/llvm/lib/Support/FileUtilities.cpp b/llvm/lib/Support/FileUtilities.cpp
index 8a234917827..5316f049a38 100644
--- a/llvm/lib/Support/FileUtilities.cpp
+++ b/llvm/lib/Support/FileUtilities.cpp
@@ -182,7 +182,7 @@ int llvm::DiffFilesWithTolerance(StringRef NameA,
       *Error = EC.message();
     return 2;
   }
-  std::unique_ptr<MemoryBuffer> F1 = std::move(F1OrErr.get());
+  MemoryBuffer &F1 = *F1OrErr.get();
 
   ErrorOr<std::unique_ptr<MemoryBuffer>> F2OrErr = MemoryBuffer::getFile(NameB);
   if (std::error_code EC = F2OrErr.getError()) {
@@ -190,17 +190,17 @@ int llvm::DiffFilesWithTolerance(StringRef NameA,
       *Error = EC.message();
     return 2;
   }
-  std::unique_ptr<MemoryBuffer> F2 = std::move(F2OrErr.get());
+  MemoryBuffer &F2 = *F2OrErr.get();
 
   // Okay, now that we opened the files, scan them for the first difference.
-  const char *File1Start = F1->getBufferStart();
-  const char *File2Start = F2->getBufferStart();
-  const char *File1End = F1->getBufferEnd();
-  const char *File2End = F2->getBufferEnd();
+  const char *File1Start = F1.getBufferStart();
+  const char *File2Start = F2.getBufferStart();
+  const char *File1End = F1.getBufferEnd();
+  const char *File2End = F2.getBufferEnd();
   const char *F1P = File1Start;
   const char *F2P = File2Start;
-  uint64_t A_size = F1->getBufferSize();
-  uint64_t B_size = F2->getBufferSize();
+  uint64_t A_size = F1.getBufferSize();
+  uint64_t B_size = F2.getBufferSize();
 
   // Are the buffers identical?  Common case: Handle this efficiently.
   if (A_size == B_size &&
diff --git a/llvm/lib/Support/LockFileManager.cpp b/llvm/lib/Support/LockFileManager.cpp
index 3f224e0c588..8fc58017cb0 100644
--- a/llvm/lib/Support/LockFileManager.cpp
+++ b/llvm/lib/Support/LockFileManager.cpp
@@ -39,11 +39,11 @@ LockFileManager::readLockFile(StringRef LockFileName) {
     sys::fs::remove(LockFileName);
     return None;
   }
-  std::unique_ptr<MemoryBuffer> MB = std::move(MBOrErr.get());
+  MemoryBuffer &MB = *MBOrErr.get();
 
   StringRef Hostname;
   StringRef PIDStr;
-  std::tie(Hostname, PIDStr) = getToken(MB->getBuffer(), " ");
+  std::tie(Hostname, PIDStr) = getToken(MB.getBuffer(), " ");
   PIDStr = PIDStr.substr(PIDStr.find_first_not_of(" "));
   int PID;
   if (!PIDStr.getAsInteger(10, PID)) {