1 //===- IRObjectFile.cpp - IR object file implementation ---------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Part of the IRObjectFile class implementation.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Object/IRObjectFile.h"
15 #include "RecordStreamer.h"
16 #include "llvm/Bitcode/ReaderWriter.h"
17 #include "llvm/IR/LLVMContext.h"
18 #include "llvm/IR/GVMaterializer.h"
19 #include "llvm/IR/Mangler.h"
20 #include "llvm/IR/Module.h"
21 #include "llvm/MC/MCRegisterInfo.h"
22 #include "llvm/MC/MCAsmInfo.h"
23 #include "llvm/MC/MCContext.h"
24 #include "llvm/MC/MCInstrInfo.h"
25 #include "llvm/MC/MCObjectFileInfo.h"
26 #include "llvm/MC/MCTargetAsmParser.h"
27 #include "llvm/MC/MCParser/MCAsmParser.h"
28 #include "llvm/Support/MemoryBuffer.h"
29 #include "llvm/Support/SourceMgr.h"
30 #include "llvm/Support/TargetRegistry.h"
31 #include "llvm/Support/raw_ostream.h"
33 using namespace object;
35 IRObjectFile::IRObjectFile(MemoryBufferRef Object, std::unique_ptr<Module> Mod)
36 : SymbolicFile(Binary::ID_IR, Object), M(std::move(Mod)) {
37 // If we have a DataLayout, setup a mangler.
38 const DataLayout *DL = M->getDataLayout();
42 Mang.reset(new Mangler(DL));
44 const std::string &InlineAsm = M->getModuleInlineAsm();
45 if (InlineAsm.empty())
48 StringRef Triple = M->getTargetTriple();
50 const Target *T = TargetRegistry::lookupTarget(Triple, Err);
54 std::unique_ptr<MCRegisterInfo> MRI(T->createMCRegInfo(Triple));
58 std::unique_ptr<MCAsmInfo> MAI(T->createMCAsmInfo(*MRI, Triple));
62 std::unique_ptr<MCSubtargetInfo> STI(
63 T->createMCSubtargetInfo(Triple, "", ""));
67 std::unique_ptr<MCInstrInfo> MCII(T->createMCInstrInfo());
71 MCObjectFileInfo MOFI;
72 MCContext MCCtx(MAI.get(), MRI.get(), &MOFI);
73 MOFI.InitMCObjectFileInfo(Triple, Reloc::Default, CodeModel::Default, MCCtx);
74 std::unique_ptr<RecordStreamer> Streamer(new RecordStreamer(MCCtx));
76 std::unique_ptr<MemoryBuffer> Buffer(MemoryBuffer::getMemBuffer(InlineAsm));
78 SrcMgr.AddNewSourceBuffer(std::move(Buffer), SMLoc());
79 std::unique_ptr<MCAsmParser> Parser(
80 createMCAsmParser(SrcMgr, MCCtx, *Streamer, *MAI));
82 MCTargetOptions MCOptions;
83 std::unique_ptr<MCTargetAsmParser> TAP(
84 T->createMCAsmParser(*STI, *Parser, *MCII, MCOptions));
88 Parser->setTargetParser(*TAP);
89 if (Parser->Run(false))
92 for (auto &KV : *Streamer) {
93 StringRef Key = KV.first();
94 RecordStreamer::State Value = KV.second;
95 uint32_t Res = BasicSymbolRef::SF_None;
97 case RecordStreamer::NeverSeen:
98 llvm_unreachable("foo");
99 case RecordStreamer::DefinedGlobal:
100 Res |= BasicSymbolRef::SF_Global;
102 case RecordStreamer::Defined:
104 case RecordStreamer::Global:
105 case RecordStreamer::Used:
106 Res |= BasicSymbolRef::SF_Undefined;
107 Res |= BasicSymbolRef::SF_Global;
110 AsmSymbols.push_back(
111 std::make_pair<std::string, uint32_t>(Key, std::move(Res)));
115 IRObjectFile::~IRObjectFile() {
118 static const GlobalValue *getGV(DataRefImpl &Symb) {
119 if ((Symb.p & 3) == 3)
122 return reinterpret_cast<GlobalValue*>(Symb.p & ~uintptr_t(3));
125 static uintptr_t skipEmpty(Module::const_alias_iterator I, const Module &M) {
126 if (I == M.alias_end())
128 const GlobalValue *GV = &*I;
129 return reinterpret_cast<uintptr_t>(GV) | 2;
132 static uintptr_t skipEmpty(Module::const_global_iterator I, const Module &M) {
133 if (I == M.global_end())
134 return skipEmpty(M.alias_begin(), M);
135 const GlobalValue *GV = &*I;
136 return reinterpret_cast<uintptr_t>(GV) | 1;
139 static uintptr_t skipEmpty(Module::const_iterator I, const Module &M) {
141 return skipEmpty(M.global_begin(), M);
142 const GlobalValue *GV = &*I;
143 return reinterpret_cast<uintptr_t>(GV) | 0;
146 static unsigned getAsmSymIndex(DataRefImpl Symb) {
147 assert((Symb.p & uintptr_t(3)) == 3);
148 uintptr_t Index = Symb.p & ~uintptr_t(3);
153 void IRObjectFile::moveSymbolNext(DataRefImpl &Symb) const {
154 const GlobalValue *GV = getGV(Symb);
157 switch (Symb.p & 3) {
159 Module::const_iterator Iter(static_cast<const Function*>(GV));
161 Res = skipEmpty(Iter, *M);
165 Module::const_global_iterator Iter(static_cast<const GlobalVariable*>(GV));
167 Res = skipEmpty(Iter, *M);
171 Module::const_alias_iterator Iter(static_cast<const GlobalAlias*>(GV));
173 Res = skipEmpty(Iter, *M);
177 unsigned Index = getAsmSymIndex(Symb);
178 assert(Index < AsmSymbols.size());
180 Res = (Index << 2) | 3;
188 std::error_code IRObjectFile::printSymbolName(raw_ostream &OS,
189 DataRefImpl Symb) const {
190 const GlobalValue *GV = getGV(Symb);
192 unsigned Index = getAsmSymIndex(Symb);
193 assert(Index <= AsmSymbols.size());
194 OS << AsmSymbols[Index].first;
195 return object_error::success;;
199 Mang->getNameWithPrefix(OS, GV, false);
203 return object_error::success;
206 static bool isDeclaration(const GlobalValue &V) {
207 if (V.hasAvailableExternallyLinkage())
210 if (V.isMaterializable())
213 return V.isDeclaration();
216 uint32_t IRObjectFile::getSymbolFlags(DataRefImpl Symb) const {
217 const GlobalValue *GV = getGV(Symb);
220 unsigned Index = getAsmSymIndex(Symb);
221 assert(Index <= AsmSymbols.size());
222 return AsmSymbols[Index].second;
225 uint32_t Res = BasicSymbolRef::SF_None;
226 if (isDeclaration(*GV))
227 Res |= BasicSymbolRef::SF_Undefined;
228 if (GV->hasPrivateLinkage())
229 Res |= BasicSymbolRef::SF_FormatSpecific;
230 if (!GV->hasLocalLinkage())
231 Res |= BasicSymbolRef::SF_Global;
232 if (GV->hasCommonLinkage())
233 Res |= BasicSymbolRef::SF_Common;
234 if (GV->hasLinkOnceLinkage() || GV->hasWeakLinkage())
235 Res |= BasicSymbolRef::SF_Weak;
237 if (GV->getName().startswith("llvm."))
238 Res |= BasicSymbolRef::SF_FormatSpecific;
239 else if (auto *Var = dyn_cast<GlobalVariable>(GV)) {
240 if (Var->getSection() == StringRef("llvm.metadata"))
241 Res |= BasicSymbolRef::SF_FormatSpecific;
247 const GlobalValue *IRObjectFile::getSymbolGV(DataRefImpl Symb) const {
248 const GlobalValue *GV = getGV(Symb);
252 basic_symbol_iterator IRObjectFile::symbol_begin_impl() const {
253 Module::const_iterator I = M->begin();
255 Ret.p = skipEmpty(I, *M);
256 return basic_symbol_iterator(BasicSymbolRef(Ret, this));
259 basic_symbol_iterator IRObjectFile::symbol_end_impl() const {
261 uint64_t NumAsm = AsmSymbols.size();
264 return basic_symbol_iterator(BasicSymbolRef(Ret, this));
267 ErrorOr<std::unique_ptr<IRObjectFile>>
268 llvm::object::IRObjectFile::createIRObjectFile(MemoryBufferRef Object,
269 LLVMContext &Context) {
271 std::unique_ptr<MemoryBuffer> Buff(MemoryBuffer::getMemBuffer(Object, false));
273 ErrorOr<Module *> MOrErr = getLazyBitcodeModule(std::move(Buff), Context);
274 if (std::error_code EC = MOrErr.getError())
277 std::unique_ptr<Module> M(MOrErr.get());
278 return llvm::make_unique<IRObjectFile>(Object, std::move(M));