135 lines
4.8 KiB
C++
135 lines
4.8 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-c/IRReader.h"
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#include "llvm/AsmParser/Parser.h"
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#include "llvm/Bitcode/BitcodeReader.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.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/Timer.h"
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#include "llvm/Support/raw_ostream.h"
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#include <system_error>
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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 *const TimeIRParsingGroupName = "irparse";
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static const char *const TimeIRParsingGroupDescription = "LLVM IR Parsing";
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static const char *const TimeIRParsingName = "parse";
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static const char *const TimeIRParsingDescription = "Parse IR";
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static std::unique_ptr<Module>
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getLazyIRModule(std::unique_ptr<MemoryBuffer> Buffer, SMDiagnostic &Err,
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LLVMContext &Context, bool ShouldLazyLoadMetadata) {
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if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
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(const unsigned char *)Buffer->getBufferEnd())) {
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Expected<std::unique_ptr<Module>> ModuleOrErr = getOwningLazyBitcodeModule(
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std::move(Buffer), Context, ShouldLazyLoadMetadata);
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if (Error E = ModuleOrErr.takeError()) {
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handleAllErrors(std::move(E), [&](ErrorInfoBase &EIB) {
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Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
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EIB.message());
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});
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return nullptr;
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}
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return std::move(ModuleOrErr.get());
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}
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return parseAssembly(Buffer->getMemBufferRef(), Err, Context);
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}
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std::unique_ptr<Module> llvm::getLazyIRFileModule(StringRef Filename,
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SMDiagnostic &Err,
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LLVMContext &Context,
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bool ShouldLazyLoadMetadata) {
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ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
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MemoryBuffer::getFileOrSTDIN(Filename);
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if (std::error_code EC = FileOrErr.getError()) {
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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 nullptr;
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}
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return getLazyIRModule(std::move(FileOrErr.get()), Err, Context,
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ShouldLazyLoadMetadata);
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}
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std::unique_ptr<Module> llvm::parseIR(MemoryBufferRef Buffer, SMDiagnostic &Err,
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LLVMContext &Context,
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bool UpgradeDebugInfo) {
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NamedRegionTimer T(TimeIRParsingName, TimeIRParsingDescription,
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TimeIRParsingGroupName, TimeIRParsingGroupDescription,
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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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Expected<std::unique_ptr<Module>> ModuleOrErr =
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parseBitcodeFile(Buffer, Context);
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if (Error E = ModuleOrErr.takeError()) {
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handleAllErrors(std::move(E), [&](ErrorInfoBase &EIB) {
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Err = SMDiagnostic(Buffer.getBufferIdentifier(), SourceMgr::DK_Error,
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EIB.message());
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});
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return nullptr;
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}
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return std::move(ModuleOrErr.get());
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}
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return parseAssembly(Buffer, Err, Context, nullptr, UpgradeDebugInfo);
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}
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std::unique_ptr<Module> llvm::parseIRFile(StringRef Filename, SMDiagnostic &Err,
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LLVMContext &Context,
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bool UpgradeDebugInfo) {
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ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
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MemoryBuffer::getFileOrSTDIN(Filename);
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if (std::error_code EC = FileOrErr.getError()) {
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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 nullptr;
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}
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return parseIR(FileOrErr.get()->getMemBufferRef(), Err, Context,
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UpgradeDebugInfo);
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}
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//===----------------------------------------------------------------------===//
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// C API.
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//===----------------------------------------------------------------------===//
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LLVMBool LLVMParseIRInContext(LLVMContextRef ContextRef,
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LLVMMemoryBufferRef MemBuf, LLVMModuleRef *OutM,
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char **OutMessage) {
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SMDiagnostic Diag;
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std::unique_ptr<MemoryBuffer> MB(unwrap(MemBuf));
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*OutM =
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wrap(parseIR(MB->getMemBufferRef(), Diag, *unwrap(ContextRef)).release());
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if(!*OutM) {
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if (OutMessage) {
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std::string buf;
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raw_string_ostream os(buf);
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Diag.print(nullptr, os, false);
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os.flush();
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*OutMessage = strdup(buf.c_str());
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}
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return 1;
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}
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return 0;
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}
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