getLazyIRModule always takes ownership. Make that explicit.

[oota-llvm.git] / lib / IRReader / IRReader.cpp

diff --git a/lib/IRReader/IRReader.cpp b/lib/IRReader/IRReader.cpp
index 2bbe0753320294b2b04426ce3ac49050bdf093a0..5675e03585e541d8e9df13dad4427df0f974d2ff 100644 (file)
--- a/lib/IRReader/IRReader.cpp
+++ b/lib/IRReader/IRReader.cpp
@@ -29,47 +29,45 @@ namespace llvm {
 static const char *const TimeIRParsingGroupName = "LLVM IR Parsing";
 static const char *const TimeIRParsingName = "Parse IR";
 
-
-Module *llvm::getLazyIRModule(MemoryBuffer *Buffer, SMDiagnostic &Err,
-                              LLVMContext &Context) {
+static Module *getLazyIRModule(std::unique_ptr<MemoryBuffer> Buffer,
+                               SMDiagnostic &Err, LLVMContext &Context) {
   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(Buffer.get(), Context);
     if (std::error_code EC = ModuleOrErr.getError()) {
       Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
                          EC.message());
-      // getLazyBitcodeModule does not take ownership of the Buffer in the
-      // case of an error.
-      delete Buffer;
       return nullptr;
     }
+    // getLazyBitcodeModule takes ownership of the Buffer when successful.
+    Buffer.release();
     return ModuleOrErr.get();
   }
 
-  return ParseAssembly(Buffer, nullptr, Err, Context);
+  return ParseAssembly(Buffer.release(), nullptr, Err, Context);
 }
 
-Module *llvm::getLazyIRFileModule(const std::string &Filename, SMDiagnostic &Err,
-                                  LLVMContext &Context) {
-  std::unique_ptr<MemoryBuffer> File;
-  if (std::error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, File)) {
+Module *llvm::getLazyIRFileModule(const std::string &Filename,
+                                  SMDiagnostic &Err, LLVMContext &Context) {
+  ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
+      MemoryBuffer::getFileOrSTDIN(Filename);
+  if (std::error_code EC = FileOrErr.getError()) {
     Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
-                       "Could not open input file: " + ec.message());
+                       "Could not open input file: " + EC.message());
     return nullptr;
   }
 
-  return getLazyIRModule(File.release(), Err, Context);
+  return getLazyIRModule(std::move(FileOrErr.get()), Err, Context);
 }
 
-Module *llvm::ParseIR(const MemoryBuffer *Buffer, SMDiagnostic &Err,
+Module *llvm::ParseIR(MemoryBuffer *Buffer, SMDiagnostic &Err,
                       LLVMContext &Context) {
   NamedRegionTimer T(TimeIRParsingName, TimeIRParsingGroupName,
                      TimePassesIsEnabled);
   if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
                 (const unsigned char *)Buffer->getBufferEnd())) {
-    ErrorOr<Module *> ModuleOrErr =
-        parseBitcodeFile(const_cast<MemoryBuffer *>(Buffer), Context);
+    ErrorOr<Module *> ModuleOrErr = parseBitcodeFile(Buffer, Context);
     Module *M = nullptr;
     if (std::error_code EC = ModuleOrErr.getError())
       Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
@@ -87,14 +85,15 @@ Module *llvm::ParseIR(const MemoryBuffer *Buffer, SMDiagnostic &Err,
 
 Module *llvm::ParseIRFile(const std::string &Filename, SMDiagnostic &Err,
                           LLVMContext &Context) {
-  std::unique_ptr<MemoryBuffer> File;
-  if (std::error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, File)) {
+  ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
+      MemoryBuffer::getFileOrSTDIN(Filename);
+  if (std::error_code EC = FileOrErr.getError()) {
     Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
-                       "Could not open input file: " + ec.message());
+                       "Could not open input file: " + EC.message());
     return nullptr;
   }
 
-  return ParseIR(File.get(), Err, Context);
+  return ParseIR(FileOrErr.get().get(), Err, Context);
 }
 
 //===----------------------------------------------------------------------===//