Answer to Philip Reames comments

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

diff --git a/lib/IRReader/IRReader.cpp b/lib/IRReader/IRReader.cpp
index 7356fd005adf8666ff9b78129cec20b435dd947e..aa7312ac04117ce9984105be9a2d86fce30616d5 100644 (file)
--- a/lib/IRReader/IRReader.cpp
+++ b/lib/IRReader/IRReader.cpp
@@ -10,7 +10,6 @@
 #include "llvm/IRReader/IRReader.h"
 #include "llvm-c/Core.h"
 #include "llvm-c/IRReader.h"
-#include "llvm/ADT/OwningPtr.h"
 #include "llvm/AsmParser/Parser.h"
 #include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/IR/LLVMContext.h"
@@ -19,7 +18,7 @@
 #include "llvm/Support/SourceMgr.h"
 #include "llvm/Support/Timer.h"
 #include "llvm/Support/raw_ostream.h"
-#include "llvm/Support/system_error.h"
+#include <system_error>
 
 using namespace llvm;
 
@@ -30,37 +29,36 @@ 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);
-    if (error_code EC = ModuleOrErr.getError()) {
+    ErrorOr<Module *> ModuleOrErr = getLazyBitcodeModule(Buffer.get(), Context);
+    if (std::error_code EC = ModuleOrErr.getError()) {
       Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
                          EC.message());
-      // ParseBitcodeFile does not take ownership of the Buffer in the
-      // case of an error.
-      delete Buffer;
-      return NULL;
+      return nullptr;
     }
+    // getLazyBitcodeModule takes ownership of the Buffer when successful.
+    Buffer.release();
     return ModuleOrErr.get();
   }
 
-  return ParseAssembly(Buffer, 0, Err, Context);
+  return ParseAssembly(std::move(Buffer), nullptr, Err, Context);
 }
 
-Module *llvm::getLazyIRFileModule(const std::string &Filename, SMDiagnostic &Err,
-                                  LLVMContext &Context) {
-  OwningPtr<MemoryBuffer> File;
-  if (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());
-    return 0;
+                       "Could not open input file: " + EC.message());
+    return nullptr;
   }
 
-  return getLazyIRModule(File.take(), Err, Context);
+  return getLazyIRModule(std::move(FileOrErr.get()), Err, Context);
 }
 
 Module *llvm::ParseIR(MemoryBuffer *Buffer, SMDiagnostic &Err,
@@ -69,29 +67,33 @@ Module *llvm::ParseIR(MemoryBuffer *Buffer, SMDiagnostic &Err,
                      TimePassesIsEnabled);
   if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
                 (const unsigned char *)Buffer->getBufferEnd())) {
-    std::string ErrMsg;
-    Module *M = ParseBitcodeFile(Buffer, Context, &ErrMsg);
-    if (M == 0)
+    ErrorOr<Module *> ModuleOrErr = parseBitcodeFile(Buffer, Context);
+    Module *M = nullptr;
+    if (std::error_code EC = ModuleOrErr.getError())
       Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
-                         ErrMsg);
-    // ParseBitcodeFile does not take ownership of the Buffer.
-    delete Buffer;
+                         EC.message());
+    else
+      M = ModuleOrErr.get();
+    // parseBitcodeFile does not take ownership of the Buffer.
     return M;
   }
 
-  return ParseAssembly(Buffer, 0, Err, Context);
+  return ParseAssembly(std::unique_ptr<MemoryBuffer>(MemoryBuffer::getMemBuffer(
+                           Buffer->getBuffer(), Buffer->getBufferIdentifier())),
+                       nullptr, Err, Context);
 }
 
 Module *llvm::ParseIRFile(const std::string &Filename, SMDiagnostic &Err,
                           LLVMContext &Context) {
-  OwningPtr<MemoryBuffer> File;
-  if (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());
-    return 0;
+                       "Could not open input file: " + EC.message());
+    return nullptr;
   }
 
-  return ParseIR(File.take(), Err, Context);
+  return ParseIR(FileOrErr.get().get(), Err, Context);
 }
 
 //===----------------------------------------------------------------------===//
@@ -103,14 +105,15 @@ LLVMBool LLVMParseIRInContext(LLVMContextRef ContextRef,
                               char **OutMessage) {
   SMDiagnostic Diag;
 
-  *OutM = wrap(ParseIR(unwrap(MemBuf), Diag, *unwrap(ContextRef)));
+  std::unique_ptr<MemoryBuffer> MB(unwrap(MemBuf));
+  *OutM = wrap(ParseIR(MB.get(), Diag, *unwrap(ContextRef)));
 
   if(!*OutM) {
     if (OutMessage) {
       std::string buf;
       raw_string_ostream os(buf);
 
-      Diag.print(NULL, os, false);
+      Diag.print(nullptr, os, false);
       os.flush();
 
       *OutMessage = strdup(buf.c_str());