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>
22 using namespace llvm;
23 
24 bool llvm::parseAssemblyInto(MemoryBufferRef F, Module &M, SMDiagnostic &Err) {
25   SourceMgr SM;
26   std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(F, false);
27   SM.AddNewSourceBuffer(std::move(Buf), SMLoc());
28 
29   return LLParser(F.getBuffer(), SM, Err, &M).Run();
30 }
31 
32 std::unique_ptr<Module> llvm::parseAssembly(MemoryBufferRef F,
33                                             SMDiagnostic &Err,
34                                             LLVMContext &Context) {
35   std::unique_ptr<Module> M =
36       make_unique<Module>(F.getBufferIdentifier(), Context);
37 
38   if (parseAssemblyInto(F, *M, Err))
39     return nullptr;
40 
41   return std::move(M);
42 }
43 
44 std::unique_ptr<Module> llvm::parseAssemblyFile(StringRef Filename,
45                                                 SMDiagnostic &Err,
46                                                 LLVMContext &Context) {
47   ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
48       MemoryBuffer::getFileOrSTDIN(Filename);
49   if (std::error_code EC = FileOrErr.getError()) {
50     Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
51                        "Could not open input file: " + EC.message());
52     return nullptr;
53   }
54 
55   return parseAssembly(FileOrErr.get()->getMemBufferRef(), Err, Context);
56 }
57 
58 std::unique_ptr<Module> llvm::parseAssemblyString(StringRef AsmString,
59                                                   SMDiagnostic &Err,
60                                                   LLVMContext &Context) {
61   MemoryBufferRef F(AsmString, "<string>");
62   return parseAssembly(F, Err, Context);
63 }
64