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 <cstring>
  22 using namespace llvm;
  23
  24 Module *llvm::ParseAssemblyFile(const std::string &Filename, SMDiagnostic &Err,
  25                                 LLVMContext &Context) {
  26   std::string ErrorStr;
  27   MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), &ErrorStr);
  28   if (F == 0) {
  29     Err = SMDiagnostic("", -1, -1,
  30                        "Could not open input file '" + Filename + "'", "");
  31     return 0;
  32   }
  33
  34   SourceMgr SM;
  35   SM.AddNewSourceBuffer(F, SMLoc());
  36
  37   OwningPtr<Module> M(new Module(Filename, Context));
  38   if (LLParser(F, SM, Err, M.get()).Run())
  39     return 0;
  40   return M.take();
  41 }
  42
  43 Module *llvm::ParseAssemblyString(const char *AsmString, Module *M,
  44                                   SMDiagnostic &Err, LLVMContext &Context) {
  45   MemoryBuffer *F =
  46     MemoryBuffer::getMemBuffer(AsmString, AsmString+strlen(AsmString),
  47                                "<string>");
  48
  49   SourceMgr SM;
  50   SM.AddNewSourceBuffer(F, SMLoc());
  51
  52   // If we are parsing into an existing module, do it.
  53   if (M)
  54     return LLParser(F, SM, Err, M).Run() ? 0 : M;
  55
  56   // Otherwise create a new module.
  57   OwningPtr<Module> M2(new Module("<string>", Context));
  58   if (LLParser(F, SM, Err, M2.get()).Run())
  59     return 0;
  60   return M2.take();
  61 }