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/Assembly/Parser.h
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm/Assembly/Parser.h"
  15 #include "LLParser.h"
  16 #include "llvm/Module.h"
  17 #include "llvm/ADT/OwningPtr.h"
  18 #include "llvm/Support/SourceMgr.h"
  19 #include "llvm/Support/MemoryBuffer.h"
  20 #include "llvm/Support/raw_ostream.h"
  21 #include "llvm/Support/system_error.h"
  22 #include <cstring>
  23 using namespace llvm;
  24
  25 Module *llvm::ParseAssembly(MemoryBuffer *F,
  26                             Module *M,
  27                             SMDiagnostic &Err,
  28                             LLVMContext &Context) {
  29   SourceMgr SM;
  30   SM.AddNewSourceBuffer(F, SMLoc());
  31
  32   // If we are parsing into an existing module, do it.
  33   if (M)
  34     return LLParser(F, SM, Err, M).Run() ? 0 : M;
  35
  36   // Otherwise create a new module.
  37   OwningPtr<Module> M2(new Module(F->getBufferIdentifier(), Context));
  38   if (LLParser(F, SM, Err, M2.get()).Run())
  39     return 0;
  40   return M2.take();
  41 }
  42
  43 Module *llvm::ParseAssemblyFile(const std::string &Filename, SMDiagnostic &Err,
  44                                 LLVMContext &Context) {
  45   OwningPtr<MemoryBuffer> File;
  46   if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), File)) {
  47     Err = SMDiagnostic(Filename,
  48                        "Could not open input file: " + ec.message());
  49     return 0;
  50   }
  51
  52   return ParseAssembly(File.take(), 0, Err, Context);
  53 }
  54
  55 Module *llvm::ParseAssemblyString(const char *AsmString, Module *M,
  56                                   SMDiagnostic &Err, LLVMContext &Context) {
  57   MemoryBuffer *F =
  58     MemoryBuffer::getMemBuffer(StringRef(AsmString, strlen(AsmString)),
  59                                "<string>");
  60
  61   return ParseAssembly(F, M, Err, Context);
  62 }