forked from OSchip/llvm-project
90 lines
3.0 KiB
C++
90 lines
3.0 KiB
C++
//===---- IRReader.cpp - Reader for LLVM IR files -------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IRReader/IRReader.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/Assembly/Parser.h"
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#include "llvm/Bitcode/ReaderWriter.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/system_error.h"
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#include "llvm/Support/Timer.h"
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using namespace llvm;
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namespace llvm {
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extern bool TimePassesIsEnabled;
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}
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static const char *TimeIRParsingGroupName = "LLVM IR Parsing";
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static const char *TimeIRParsingName = "Parse IR";
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Module *llvm::getLazyIRModule(MemoryBuffer *Buffer, SMDiagnostic &Err,
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LLVMContext &Context) {
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if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
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(const unsigned char *)Buffer->getBufferEnd())) {
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std::string ErrMsg;
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Module *M = getLazyBitcodeModule(Buffer, Context, &ErrMsg);
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if (M == 0) {
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Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
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ErrMsg);
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// ParseBitcodeFile does not take ownership of the Buffer in the
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// case of an error.
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delete Buffer;
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}
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return M;
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}
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return ParseAssembly(Buffer, 0, Err, Context);
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}
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Module *llvm::getLazyIRFileModule(const std::string &Filename, SMDiagnostic &Err,
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LLVMContext &Context) {
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OwningPtr<MemoryBuffer> File;
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if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, File)) {
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Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
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"Could not open input file: " + ec.message());
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return 0;
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}
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return getLazyIRModule(File.take(), Err, Context);
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}
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Module *llvm::ParseIR(MemoryBuffer *Buffer, SMDiagnostic &Err,
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LLVMContext &Context) {
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NamedRegionTimer T(TimeIRParsingName, TimeIRParsingGroupName,
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TimePassesIsEnabled);
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if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
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(const unsigned char *)Buffer->getBufferEnd())) {
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std::string ErrMsg;
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Module *M = ParseBitcodeFile(Buffer, Context, &ErrMsg);
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if (M == 0)
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Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
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ErrMsg);
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// ParseBitcodeFile does not take ownership of the Buffer.
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delete Buffer;
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return M;
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}
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return ParseAssembly(Buffer, 0, Err, Context);
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}
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Module *llvm::ParseIRFile(const std::string &Filename, SMDiagnostic &Err,
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LLVMContext &Context) {
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OwningPtr<MemoryBuffer> File;
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if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, File)) {
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Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
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"Could not open input file: " + ec.message());
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return 0;
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}
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return ParseIR(File.take(), Err, Context);
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}
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