Parser.cpp revision 263508 
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/Assembly/Parser.h
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/Assembly/Parser.h"
15#include "LLParser.h"
16#include "llvm/ADT/OwningPtr.h"
17#include "llvm/IR/Module.h"
18#include "llvm/Support/MemoryBuffer.h"
19#include "llvm/Support/SourceMgr.h"
20#include "llvm/Support/raw_ostream.h"
21#include "llvm/Support/system_error.h"
22#include <cstring>
23using namespace llvm;
24
25Module *llvm::ParseAssembly(MemoryBuffer *F,
26                            Module *M,
27                            SMDiagnostic &Err,
28                            LLVMContext &Context) {
29  SourceMgr SM;
30  SM.AddNewSourceBuffer(F, SMLoc());
31
32  // If we are parsing into an existing module, do it.
33  if (M)
34    return LLParser(F, SM, Err, M).Run() ? 0 : M;
35
36  // Otherwise create a new module.
37  OwningPtr<Module> M2(new Module(F->getBufferIdentifier(), Context));
38  if (LLParser(F, SM, Err, M2.get()).Run())
39    return 0;
40  return M2.take();
41}
42
43Module *llvm::ParseAssemblyFile(const std::string &Filename, SMDiagnostic &Err,
44                                LLVMContext &Context) {
45  OwningPtr<MemoryBuffer> File;
46  if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, File)) {
47    Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
48                       "Could not open input file: " + ec.message());
49    return 0;
50  }
51
52  return ParseAssembly(File.take(), 0, 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, strlen(AsmString)),
59                               "<string>");
60
61  return ParseAssembly(F, M, Err, Context);
62}
63