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annotate lib/IRReader/IRReader.cpp @ 77:54457678186b

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LLVM 3.6
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Mon, 08 Sep 2014 22:06:00 +0900
parents 95c75e76d11b
children 60c9769439b8
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1 //===---- IRReader.cpp - Reader for LLVM IR files -------------------------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #include "llvm/IRReader/IRReader.h"
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11 #include "llvm-c/Core.h"
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12 #include "llvm-c/IRReader.h"
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13 #include "llvm/AsmParser/Parser.h"
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14 #include "llvm/Bitcode/ReaderWriter.h"
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15 #include "llvm/IR/LLVMContext.h"
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16 #include "llvm/IR/Module.h"
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17 #include "llvm/Support/MemoryBuffer.h"
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18 #include "llvm/Support/SourceMgr.h"
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19 #include "llvm/Support/Timer.h"
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20 #include "llvm/Support/raw_ostream.h"
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21 #include <system_error>
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22
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23 using namespace llvm;
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24
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25 namespace llvm {
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26 extern bool TimePassesIsEnabled;
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27 }
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28
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29 static const char *const TimeIRParsingGroupName = "LLVM IR Parsing";
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30 static const char *const TimeIRParsingName = "Parse IR";
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31
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32 static std::unique_ptr<Module>
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33 getLazyIRModule(std::unique_ptr<MemoryBuffer> Buffer, SMDiagnostic &Err,
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34 LLVMContext &Context) {
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35 if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
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36 (const unsigned char *)Buffer->getBufferEnd())) {
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37 std::string ErrMsg;
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38 ErrorOr<Module *> ModuleOrErr =
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39 getLazyBitcodeModule(std::move(Buffer), Context);
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40 if (std::error_code EC = ModuleOrErr.getError()) {
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41 Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
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42 EC.message());
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43 return nullptr;
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44 }
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45 return std::unique_ptr<Module>(ModuleOrErr.get());
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46 }
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47
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48 return parseAssembly(Buffer->getMemBufferRef(), Err, Context);
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49 }
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50
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51 std::unique_ptr<Module> llvm::getLazyIRFileModule(StringRef Filename,
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52 SMDiagnostic &Err,
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53 LLVMContext &Context) {
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54 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
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55 MemoryBuffer::getFileOrSTDIN(Filename);
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56 if (std::error_code EC = FileOrErr.getError()) {
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57 Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
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58 "Could not open input file: " + EC.message());
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59 return nullptr;
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60 }
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61
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62 return getLazyIRModule(std::move(FileOrErr.get()), Err, Context);
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63 }
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64
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65 std::unique_ptr<Module> llvm::parseIR(MemoryBufferRef Buffer, SMDiagnostic &Err,
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66 LLVMContext &Context) {
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67 NamedRegionTimer T(TimeIRParsingName, TimeIRParsingGroupName,
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68 TimePassesIsEnabled);
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69 if (isBitcode((const unsigned char *)Buffer.getBufferStart(),
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70 (const unsigned char *)Buffer.getBufferEnd())) {
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71 ErrorOr<Module *> ModuleOrErr = parseBitcodeFile(Buffer, Context);
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72 if (std::error_code EC = ModuleOrErr.getError()) {
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73 Err = SMDiagnostic(Buffer.getBufferIdentifier(), SourceMgr::DK_Error,
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74 EC.message());
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75 return nullptr;
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76 }
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77 return std::unique_ptr<Module>(ModuleOrErr.get());
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78 }
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79
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80 return parseAssembly(Buffer, Err, Context);
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81 }
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82
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83 std::unique_ptr<Module> llvm::parseIRFile(StringRef Filename, SMDiagnostic &Err,
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84 LLVMContext &Context) {
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85 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
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86 MemoryBuffer::getFileOrSTDIN(Filename);
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87 if (std::error_code EC = FileOrErr.getError()) {
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88 Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
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89 "Could not open input file: " + EC.message());
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90 return nullptr;
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91 }
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92
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93 return parseIR(FileOrErr.get()->getMemBufferRef(), Err, Context);
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94 }
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96 //===----------------------------------------------------------------------===//
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97 // C API.
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98 //===----------------------------------------------------------------------===//
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99
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100 LLVMBool LLVMParseIRInContext(LLVMContextRef ContextRef,
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101 LLVMMemoryBufferRef MemBuf, LLVMModuleRef *OutM,
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102 char **OutMessage) {
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103 SMDiagnostic Diag;
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104
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105 std::unique_ptr<MemoryBuffer> MB(unwrap(MemBuf));
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106 *OutM =
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107 wrap(parseIR(MB->getMemBufferRef(), Diag, *unwrap(ContextRef)).release());
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108
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109 if(!*OutM) {
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110 if (OutMessage) {
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111 std::string buf;
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112 raw_string_ostream os(buf);
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113
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114 Diag.print(nullptr, os, false);
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115 os.flush();
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116
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117 *OutMessage = strdup(buf.c_str());
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118 }
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119 return 1;
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120 }
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121
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122 return 0;
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123 }