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/ADT/STLExtras.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 <cstring>
22 #include <system_error>
23 using namespace llvm;
24 
25 bool llvm::parseAssemblyInto(MemoryBufferRef F, Module &M, SMDiagnostic &Err) {
26   SourceMgr SM;
27   std::unique_ptr<MemoryBuffer> Buf = MemoryBuffer::getMemBuffer(F, false);
28   SM.AddNewSourceBuffer(std::move(Buf), SMLoc());
29 
30   return LLParser(F.getBuffer(), SM, Err, &M).Run();
31 }
32 
33 std::unique_ptr<Module> llvm::parseAssembly(MemoryBufferRef F,
34                                             SMDiagnostic &Err,
35                                             LLVMContext &Context) {
36   std::unique_ptr<Module> M =
37       make_unique<Module>(F.getBufferIdentifier(), Context);
38 
39   if (parseAssemblyInto(F, *M, Err))
40     return nullptr;
41 
42   return M;
43 }
44 
45 std::unique_ptr<Module> llvm::parseAssemblyFile(StringRef Filename,
46                                                 SMDiagnostic &Err,
47                                                 LLVMContext &Context) {
48   ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
49       MemoryBuffer::getFileOrSTDIN(Filename);
50   if (std::error_code EC = FileOrErr.getError()) {
51     Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
52                        "Could not open input file: " + EC.message());
53     return nullptr;
54   }
55 
56   return parseAssembly(FileOrErr.get()->getMemBufferRef(), Err, Context);
57 }
58 
59 std::unique_ptr<Module> llvm::parseAssemblyString(StringRef AsmString,
60                                                   SMDiagnostic &Err,
61                                                   LLVMContext &Context) {
62   MemoryBufferRef F(AsmString, "<string>");
63   return parseAssembly(F, Err, Context);
64 }
65