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