lib/AsmParser/Parser.cpp

   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 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 }