Pass a && to getLazyBitcodeModule.

This forces callers to use std::move when calling it. It is somewhat odd to have
code with std::move that doesn't always move, but it is also odd to have code
without std::move that sometimes moves.

llvm-svn: 217049

7 files changed, 15 insertions, 12 deletions

diff --git a/llvm/include/llvm/Bitcode/ReaderWriter.h b/llvm/include/llvm/Bitcode/ReaderWriter.h
index 287311032f2..2e8cdc737ed 100644
--- a/llvm/include/llvm/Bitcode/ReaderWriter.h
+++ b/llvm/include/llvm/Bitcode/ReaderWriter.h
@@ -28,9 +28,9 @@ namespace llvm {
   class raw_ostream;
 
   /// Read the header of the specified bitcode buffer and prepare for lazy
-  /// deserialization of function bodies.  If successful, this takes ownership
-  /// of 'buffer. On error, this *does not* take ownership of Buffer.
-  ErrorOr<Module *> getLazyBitcodeModule(std::unique_ptr<MemoryBuffer> &Buffer,
+  /// deserialization of function bodies.  If successful, this moves Buffer. On
+  /// error, this *does not* move Buffer.
+  ErrorOr<Module *> getLazyBitcodeModule(std::unique_ptr<MemoryBuffer> &&Buffer,
                                          LLVMContext &Context);
 
   /// getStreamedBitcodeModule - Read the header of the specified stream
diff --git a/llvm/lib/Bitcode/Reader/BitReader.cpp b/llvm/lib/Bitcode/Reader/BitReader.cpp
index 76a7e6ae159..9b3acb5ca0a 100644
--- a/llvm/lib/Bitcode/Reader/BitReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitReader.cpp
@@ -54,7 +54,7 @@ LLVMBool LLVMGetBitcodeModuleInContext(LLVMContextRef ContextRef,
   std::unique_ptr<MemoryBuffer> Owner(unwrap(MemBuf));
 
   ErrorOr<Module *> ModuleOrErr =
-      getLazyBitcodeModule(Owner, *unwrap(ContextRef));
+      getLazyBitcodeModule(std::move(Owner), *unwrap(ContextRef));
   Owner.release();
 
   if (std::error_code EC = ModuleOrErr.getError()) {
diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
index a614ec37cf6..84ee0b4b3a6 100644
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -3520,7 +3520,7 @@ const std::error_category &llvm::BitcodeErrorCategory() {
 /// \param[in] WillMaterializeAll Set to \c true if the caller promises to
 /// materialize everything -- in particular, if this isn't truly lazy.
 static ErrorOr<Module *>
-getLazyBitcodeModuleImpl(std::unique_ptr<MemoryBuffer> &Buffer,
+getLazyBitcodeModuleImpl(std::unique_ptr<MemoryBuffer> &&Buffer,
                          LLVMContext &Context, bool WillMaterializeAll) {
   Module *M = new Module(Buffer->getBufferIdentifier(), Context);
   BitcodeReader *R = new BitcodeReader(Buffer.get(), Context);
@@ -3545,9 +3545,9 @@ getLazyBitcodeModuleImpl(std::unique_ptr<MemoryBuffer> &Buffer,
 }
 
 ErrorOr<Module *>
-llvm::getLazyBitcodeModule(std::unique_ptr<MemoryBuffer> &Buffer,
+llvm::getLazyBitcodeModule(std::unique_ptr<MemoryBuffer> &&Buffer,
                            LLVMContext &Context) {
-  return getLazyBitcodeModuleImpl(Buffer, Context, false);
+  return getLazyBitcodeModuleImpl(std::move(Buffer), Context, false);
 }
 
 Module *llvm::getStreamedBitcodeModule(const std::string &name,
@@ -3569,7 +3569,8 @@ Module *llvm::getStreamedBitcodeModule(const std::string &name,
 ErrorOr<Module *> llvm::parseBitcodeFile(MemoryBufferRef Buffer,
                                          LLVMContext &Context) {
   std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(Buffer, false);
-  ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModuleImpl(Buf, Context, true);
+  ErrorOr<Module *> ModuleOrErr =
+      getLazyBitcodeModuleImpl(std::move(Buf), Context, true);
   if (!ModuleOrErr)
     return ModuleOrErr;
   Module *M = ModuleOrErr.get();
diff --git a/llvm/lib/IRReader/IRReader.cpp b/llvm/lib/IRReader/IRReader.cpp
index a50e3865285..342fc5b27c8 100644
--- a/llvm/lib/IRReader/IRReader.cpp
+++ b/llvm/lib/IRReader/IRReader.cpp
@@ -35,7 +35,8 @@ getLazyIRModule(std::unique_ptr<MemoryBuffer> Buffer, SMDiagnostic &Err,
   if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
                 (const unsigned char *)Buffer->getBufferEnd())) {
     std::string ErrMsg;
-    ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModule(Buffer, Context);
+    ErrorOr<Module *> ModuleOrErr =
+        getLazyBitcodeModule(std::move(Buffer), Context);
     if (std::error_code EC = ModuleOrErr.getError()) {
       Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
                          EC.message());
diff --git a/llvm/lib/Object/IRObjectFile.cpp b/llvm/lib/Object/IRObjectFile.cpp
index 4c050d5badb..0259b46c70c 100644
--- a/llvm/lib/Object/IRObjectFile.cpp
+++ b/llvm/lib/Object/IRObjectFile.cpp
@@ -270,7 +270,7 @@ llvm::object::IRObjectFile::createIRObjectFile(MemoryBufferRef Object,
 
   std::unique_ptr<MemoryBuffer> Buff(MemoryBuffer::getMemBuffer(Object, false));
 
-  ErrorOr<Module *> MOrErr = getLazyBitcodeModule(Buff, Context);
+  ErrorOr<Module *> MOrErr = getLazyBitcodeModule(std::move(Buff), Context);
   if (std::error_code EC = MOrErr.getError())
     return EC;
 
diff --git a/llvm/tools/gold/gold-plugin.cpp b/llvm/tools/gold/gold-plugin.cpp
index b08f74d5916..bdbf0263dca 100644
--- a/llvm/tools/gold/gold-plugin.cpp
+++ b/llvm/tools/gold/gold-plugin.cpp
@@ -552,7 +552,7 @@ getModuleForFile(LLVMContext &Context, claimed_file &F, raw_fd_ostream *ApiFile,
   if (release_input_file(F.handle) != LDPS_OK)
     message(LDPL_FATAL, "Failed to release file information");
 
-  ErrorOr<Module *> MOrErr = getLazyBitcodeModule(Buffer, Context);
+  ErrorOr<Module *> MOrErr = getLazyBitcodeModule(std::move(Buffer), Context);
 
   if (std::error_code EC = MOrErr.getError())
     message(LDPL_FATAL, "Could not read bitcode from file : %s",
diff --git a/llvm/unittests/Bitcode/BitReaderTest.cpp b/llvm/unittests/Bitcode/BitReaderTest.cpp
index eb6c125b79b..a27332b5b35 100644
--- a/llvm/unittests/Bitcode/BitReaderTest.cpp
+++ b/llvm/unittests/Bitcode/BitReaderTest.cpp
@@ -53,7 +53,8 @@ static std::unique_ptr<Module> getLazyModuleFromAssembly(LLVMContext &Context,
   writeModuleToBuffer(parseAssembly(Assembly), Mem);
   std::unique_ptr<MemoryBuffer> Buffer =
       MemoryBuffer::getMemBuffer(Mem.str(), "test", false);
-  ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModule(Buffer, Context);
+  ErrorOr<Module *> ModuleOrErr =
+      getLazyBitcodeModule(std::move(Buffer), Context);
   return std::unique_ptr<Module>(ModuleOrErr.get());
 }