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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-c/Core.h"
#include "llvm-c/IRReader.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/Timer.h"
#include "llvm/Support/raw_ostream.h"
#include <system_error>
using namespace llvm;
namespace llvm {
extern bool TimePassesIsEnabled;
}
static const char *const TimeIRParsingGroupName = "LLVM IR Parsing";
static const char *const TimeIRParsingName = "Parse IR";
static Module *getLazyIRModule(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 (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;
}
return ModuleOrErr.get();
}
return ParseAssembly(Buffer, nullptr, Err, Context);
}
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 nullptr;
}
return getLazyIRModule(FileOrErr.get().release(), Err, Context);
}
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(Buffer, Context);
Module *M = nullptr;
if (std::error_code EC = ModuleOrErr.getError())
Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
EC.message());
else
M = ModuleOrErr.get();
// parseBitcodeFile does not take ownership of the Buffer.
return M;
}
return ParseAssembly(MemoryBuffer::getMemBuffer(
Buffer->getBuffer(), Buffer->getBufferIdentifier()),
nullptr, Err, Context);
}
Module *llvm::ParseIRFile(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 nullptr;
}
return ParseIR(FileOrErr.get().get(), Err, Context);
}
//===----------------------------------------------------------------------===//
// C API.
//===----------------------------------------------------------------------===//
LLVMBool LLVMParseIRInContext(LLVMContextRef ContextRef,
LLVMMemoryBufferRef MemBuf, LLVMModuleRef *OutM,
char **OutMessage) {
SMDiagnostic Diag;
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(nullptr, os, false);
os.flush();
*OutMessage = strdup(buf.c_str());
}
return 1;
}
return 0;
}
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