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-rw-r--r--lib/IRReader/IRReader.cpp78
1 files changed, 78 insertions, 0 deletions
diff --git a/lib/IRReader/IRReader.cpp b/lib/IRReader/IRReader.cpp
new file mode 100644
index 0000000000..dff4c1fa43
--- /dev/null
+++ b/lib/IRReader/IRReader.cpp
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+//===---- IRReader.cpp - Reader for LLVM IR files -------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/IRReader/IRReader.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/Assembly/Parser.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/system_error.h"
+
+using namespace llvm;
+
+Module *llvm::getLazyIRModule(MemoryBuffer *Buffer, SMDiagnostic &Err,
+ LLVMContext &Context) {
+ if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
+ (const unsigned char *)Buffer->getBufferEnd())) {
+ std::string ErrMsg;
+ Module *M = getLazyBitcodeModule(Buffer, Context, &ErrMsg);
+ if (M == 0) {
+ Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
+ ErrMsg);
+ // ParseBitcodeFile does not take ownership of the Buffer in the
+ // case of an error.
+ delete Buffer;
+ }
+ return M;
+ }
+
+ return ParseAssembly(Buffer, 0, Err, Context);
+}
+
+Module *llvm::getLazyIRFileModule(const std::string &Filename, SMDiagnostic &Err,
+ LLVMContext &Context) {
+ OwningPtr<MemoryBuffer> File;
+ if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), File)) {
+ Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
+ "Could not open input file: " + ec.message());
+ return 0;
+ }
+
+ return getLazyIRModule(File.take(), Err, Context);
+}
+
+Module *llvm::ParseIR(MemoryBuffer *Buffer, SMDiagnostic &Err,
+ LLVMContext &Context) {
+ if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
+ (const unsigned char *)Buffer->getBufferEnd())) {
+ std::string ErrMsg;
+ Module *M = ParseBitcodeFile(Buffer, Context, &ErrMsg);
+ if (M == 0)
+ Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
+ ErrMsg);
+ // ParseBitcodeFile does not take ownership of the Buffer.
+ delete Buffer;
+ return M;
+ }
+
+ return ParseAssembly(Buffer, 0, Err, Context);
+}
+
+Module *llvm::ParseIRFile(const std::string &Filename, SMDiagnostic &Err,
+ LLVMContext &Context) {
+ OwningPtr<MemoryBuffer> File;
+ if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), File)) {
+ Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
+ "Could not open input file: " + ec.message());
+ return 0;
+ }
+
+ return ParseIR(File.take(), Err, Context);
+}