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/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 }