Parser.cpp revision cd81d94322a39503e4a3e87b6ee03d4fcb3465fb 
1//===- Parser.cpp - Main dispatch module for the Parser library -----------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This library implements the functionality defined in llvm/AsmParser/Parser.h
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/AsmParser/Parser.h"
15#include "LLParser.h"
16#include "llvm/IR/Module.h"
17#include "llvm/Support/MemoryBuffer.h"
18#include "llvm/Support/SourceMgr.h"
19#include "llvm/Support/raw_ostream.h"
20#include <cstring>
21#include <system_error>
22using namespace llvm;
23
24Module *llvm::ParseAssembly(MemoryBuffer *F,
25                            Module *M,
26                            SMDiagnostic &Err,
27                            LLVMContext &Context) {
28  SourceMgr SM;
29  SM.AddNewSourceBuffer(F, SMLoc());
30
31  // If we are parsing into an existing module, do it.
32  if (M)
33    return LLParser(F, SM, Err, M).Run() ? nullptr : M;
34
35  // Otherwise create a new module.
36  std::unique_ptr<Module> M2(new Module(F->getBufferIdentifier(), Context));
37  if (LLParser(F, SM, Err, M2.get()).Run())
38    return nullptr;
39  return M2.release();
40}
41
42Module *llvm::ParseAssemblyFile(const std::string &Filename, SMDiagnostic &Err,
43                                LLVMContext &Context) {
44  ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
45      MemoryBuffer::getFileOrSTDIN(Filename);
46  if (std::error_code EC = FileOrErr.getError()) {
47    Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
48                       "Could not open input file: " + EC.message());
49    return nullptr;
50  }
51
52  return ParseAssembly(FileOrErr.get().release(), nullptr, Err, Context);
53}
54
55Module *llvm::ParseAssemblyString(const char *AsmString, Module *M,
56                                  SMDiagnostic &Err, LLVMContext &Context) {
57  MemoryBuffer *F =
58      MemoryBuffer::getMemBuffer(StringRef(AsmString), "<string>");
59
60  return ParseAssembly(F, M, Err, Context);
61}
62