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annotate lib/IRReader/IRReader.cpp @ 128:c347d3398279 default tip

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fix
author mir3636
date Wed, 06 Dec 2017 14:37:17 +0900
parents 803732b1fca8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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/BitcodeReader.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 = "irparse";
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30 static const char *const TimeIRParsingGroupDescription = "LLVM IR Parsing";
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31 static const char *const TimeIRParsingName = "parse";
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32 static const char *const TimeIRParsingDescription = "Parse IR";
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33
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34 static std::unique_ptr<Module>
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35 getLazyIRModule(std::unique_ptr<MemoryBuffer> Buffer, SMDiagnostic &Err,
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36 LLVMContext &Context, bool ShouldLazyLoadMetadata) {
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37 if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
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38 (const unsigned char *)Buffer->getBufferEnd())) {
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39 Expected<std::unique_ptr<Module>> ModuleOrErr = getOwningLazyBitcodeModule(
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40 std::move(Buffer), Context, ShouldLazyLoadMetadata);
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41 if (Error E = ModuleOrErr.takeError()) {
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42 handleAllErrors(std::move(E), [&](ErrorInfoBase &EIB) {
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43 Err = SMDiagnostic(Buffer->getBufferIdentifier(), SourceMgr::DK_Error,
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44 EIB.message());
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45 });
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46 return nullptr;
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47 }
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48 return std::move(ModuleOrErr.get());
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49 }
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50
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51 return parseAssembly(Buffer->getMemBufferRef(), Err, Context);
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52 }
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53
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54 std::unique_ptr<Module> llvm::getLazyIRFileModule(StringRef Filename,
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55 SMDiagnostic &Err,
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56 LLVMContext &Context,
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57 bool ShouldLazyLoadMetadata) {
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58 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
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59 MemoryBuffer::getFileOrSTDIN(Filename);
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60 if (std::error_code EC = FileOrErr.getError()) {
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61 Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
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62 "Could not open input file: " + EC.message());
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63 return nullptr;
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64 }
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65
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66 return getLazyIRModule(std::move(FileOrErr.get()), Err, Context,
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67 ShouldLazyLoadMetadata);
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68 }
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69
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70 std::unique_ptr<Module> llvm::parseIR(MemoryBufferRef Buffer, SMDiagnostic &Err,
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71 LLVMContext &Context,
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72 bool UpgradeDebugInfo) {
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73 NamedRegionTimer T(TimeIRParsingName, TimeIRParsingDescription,
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74 TimeIRParsingGroupName, TimeIRParsingGroupDescription,
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75 TimePassesIsEnabled);
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76 if (isBitcode((const unsigned char *)Buffer.getBufferStart(),
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77 (const unsigned char *)Buffer.getBufferEnd())) {
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78 Expected<std::unique_ptr<Module>> ModuleOrErr =
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79 parseBitcodeFile(Buffer, Context);
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80 if (Error E = ModuleOrErr.takeError()) {
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81 handleAllErrors(std::move(E), [&](ErrorInfoBase &EIB) {
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82 Err = SMDiagnostic(Buffer.getBufferIdentifier(), SourceMgr::DK_Error,
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83 EIB.message());
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84 });
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85 return nullptr;
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86 }
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87 return std::move(ModuleOrErr.get());
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88 }
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89
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90 return parseAssembly(Buffer, Err, Context, nullptr, UpgradeDebugInfo);
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91 }
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92
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93 std::unique_ptr<Module> llvm::parseIRFile(StringRef Filename, SMDiagnostic &Err,
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94 LLVMContext &Context,
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95 bool UpgradeDebugInfo) {
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96 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
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97 MemoryBuffer::getFileOrSTDIN(Filename);
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98 if (std::error_code EC = FileOrErr.getError()) {
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99 Err = SMDiagnostic(Filename, SourceMgr::DK_Error,
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100 "Could not open input file: " + EC.message());
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101 return nullptr;
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102 }
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103
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104 return parseIR(FileOrErr.get()->getMemBufferRef(), Err, Context,
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105 UpgradeDebugInfo);
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106 }
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107
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108 //===----------------------------------------------------------------------===//
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109 // C API.
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110 //===----------------------------------------------------------------------===//
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111
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112 LLVMBool LLVMParseIRInContext(LLVMContextRef ContextRef,
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113 LLVMMemoryBufferRef MemBuf, LLVMModuleRef *OutM,
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114 char **OutMessage) {
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115 SMDiagnostic Diag;
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116
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117 std::unique_ptr<MemoryBuffer> MB(unwrap(MemBuf));
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118 *OutM =
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119 wrap(parseIR(MB->getMemBufferRef(), Diag, *unwrap(ContextRef)).release());
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120
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121 if(!*OutM) {
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122 if (OutMessage) {
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123 std::string buf;
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124 raw_string_ostream os(buf);
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125
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126 Diag.print(nullptr, os, false);
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127 os.flush();
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128
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129 *OutMessage = strdup(buf.c_str());
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130 }
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131 return 1;
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132 }
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133
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134 return 0;
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135 }