-//===- MIRParser.cpp - MIR serialization format parser implementation -----===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the class that parses the optional LLVM IR and machine
-// functions that are stored in MIR files.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/MIR/MIRParser.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/AsmParser/Parser.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Support/SMLoc.h"
-#include "llvm/Support/SourceMgr.h"
-#include "llvm/Support/MemoryBuffer.h"
-#include "llvm/Support/YAMLTraits.h"
-#include <memory>
-
-using namespace llvm;
-
-namespace {
-
-/// This class implements the parsing of LLVM IR that's embedded inside a MIR
-/// file.
-class MIRParserImpl {
- SourceMgr SM;
- StringRef Filename;
- LLVMContext &Context;
-
-public:
- MIRParserImpl(std::unique_ptr<MemoryBuffer> Contents, StringRef Filename,
- LLVMContext &Context);
-
- /// Try to parse the optional LLVM module in the MIR file.
- ///
- /// Return null if an error occurred while parsing the LLVM module.
- std::unique_ptr<Module> parseLLVMModule(SMDiagnostic &Error);
-};
-
-} // end anonymous namespace
-
-MIRParserImpl::MIRParserImpl(std::unique_ptr<MemoryBuffer> Contents,
- StringRef Filename, LLVMContext &Context)
- : SM(), Filename(Filename), Context(Context) {
- SM.AddNewSourceBuffer(std::move(Contents), SMLoc());
-}
-
-std::unique_ptr<Module> MIRParserImpl::parseLLVMModule(SMDiagnostic &Error) {
- yaml::Input In(SM.getMemoryBuffer(SM.getMainFileID())->getBuffer());
-
- // Parse the block scalar manually so that we can return unique pointer
- // without having to go trough YAML traits.
- if (In.setCurrentDocument()) {
- if (const auto *BSN =
- dyn_cast_or_null<yaml::BlockScalarNode>(In.getCurrentNode())) {
- return parseAssembly(MemoryBufferRef(BSN->getValue(), Filename), Error,
- Context);
- }
- }
-
- // Create an new, empty module.
- return llvm::make_unique<Module>(Filename, Context);
-}
-
-std::unique_ptr<Module> llvm::parseMIRFile(StringRef Filename,
- SMDiagnostic &Error,
- LLVMContext &Context) {
- auto FileOrErr = MemoryBuffer::getFile(Filename);
- if (std::error_code EC = FileOrErr.getError()) {
- Error = SMDiagnostic(Filename, SourceMgr::DK_Error,
- "Could not open input file: " + EC.message());
- return std::unique_ptr<Module>();
- }
- return parseMIR(std::move(FileOrErr.get()), Error, Context);
-}
-
-std::unique_ptr<Module> llvm::parseMIR(std::unique_ptr<MemoryBuffer> Contents,
- SMDiagnostic &Error,
- LLVMContext &Context) {
- auto Filename = Contents->getBufferIdentifier();
- MIRParserImpl Parser(std::move(Contents), Filename, Context);
- return Parser.parseLLVMModule(Error);
-}
projects / oota-llvm.git / commitdiff