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(std::unique_ptr<MemoryBuffer> Object,
36 std::unique_ptr<Module> Mod)
37 : SymbolicFile(Binary::ID_IR, std::move(Object)), M(std::move(Mod)) {
38 // If we have a DataLayout, setup a mangler.
39 const DataLayout *DL = M->getDataLayout();
43 Mang.reset(new Mangler(DL));
45 const std::string &InlineAsm = M->getModuleInlineAsm();
46 if (InlineAsm.empty())
49 StringRef Triple = M->getTargetTriple();
51 const Target *T = TargetRegistry::lookupTarget(Triple, Err);
55 std::unique_ptr<MCRegisterInfo> MRI(T->createMCRegInfo(Triple));
59 std::unique_ptr<MCAsmInfo> MAI(T->createMCAsmInfo(*MRI, Triple));
63 std::unique_ptr<MCSubtargetInfo> STI(
64 T->createMCSubtargetInfo(Triple, "", ""));
68 std::unique_ptr<MCInstrInfo> MCII(T->createMCInstrInfo());
72 MCObjectFileInfo MOFI;
73 MCContext MCCtx(MAI.get(), MRI.get(), &MOFI);
74 MOFI.InitMCObjectFileInfo(Triple, Reloc::Default, CodeModel::Default, MCCtx);
75 std::unique_ptr<RecordStreamer> Streamer(new RecordStreamer(MCCtx));
77 std::unique_ptr<MemoryBuffer> Buffer(MemoryBuffer::getMemBuffer(InlineAsm));
79 SrcMgr.AddNewSourceBuffer(Buffer.release(), SMLoc());
80 std::unique_ptr<MCAsmParser> Parser(
81 createMCAsmParser(SrcMgr, MCCtx, *Streamer, *MAI));
83 MCTargetOptions MCOptions;
84 std::unique_ptr<MCTargetAsmParser> TAP(
85 T->createMCAsmParser(*STI, *Parser, *MCII, MCOptions));
89 Parser->setTargetParser(*TAP);
90 if (Parser->Run(false))
93 for (auto &KV : *Streamer) {
94 StringRef Key = KV.first();
95 RecordStreamer::State Value = KV.second;
96 uint32_t Res = BasicSymbolRef::SF_None;
98 case RecordStreamer::NeverSeen:
99 llvm_unreachable("foo");
100 case RecordStreamer::DefinedGlobal:
101 Res |= BasicSymbolRef::SF_Global;
103 case RecordStreamer::Defined:
105 case RecordStreamer::Global:
106 case RecordStreamer::Used:
107 Res |= BasicSymbolRef::SF_Undefined;
108 Res |= BasicSymbolRef::SF_Global;
111 AsmSymbols.push_back(
112 std::make_pair<std::string, uint32_t>(Key, std::move(Res)));
116 IRObjectFile::~IRObjectFile() {
117 GVMaterializer *GVM = M->getMaterializer();
119 GVM->releaseBuffer();
122 static const GlobalValue *getGV(DataRefImpl &Symb) {
123 if ((Symb.p & 3) == 3)
126 return reinterpret_cast<GlobalValue*>(Symb.p & ~uintptr_t(3));
129 static uintptr_t skipEmpty(Module::const_alias_iterator I, const Module &M) {
130 if (I == M.alias_end())
132 const GlobalValue *GV = &*I;
133 return reinterpret_cast<uintptr_t>(GV) | 2;
136 static uintptr_t skipEmpty(Module::const_global_iterator I, const Module &M) {
137 if (I == M.global_end())
138 return skipEmpty(M.alias_begin(), M);
139 const GlobalValue *GV = &*I;
140 return reinterpret_cast<uintptr_t>(GV) | 1;
143 static uintptr_t skipEmpty(Module::const_iterator I, const Module &M) {
145 return skipEmpty(M.global_begin(), M);
146 const GlobalValue *GV = &*I;
147 return reinterpret_cast<uintptr_t>(GV) | 0;
150 static unsigned getAsmSymIndex(DataRefImpl Symb) {
151 assert((Symb.p & uintptr_t(3)) == 3);
152 uintptr_t Index = Symb.p & ~uintptr_t(3);
157 void IRObjectFile::moveSymbolNext(DataRefImpl &Symb) const {
158 const GlobalValue *GV = getGV(Symb);
161 switch (Symb.p & 3) {
163 Module::const_iterator Iter(static_cast<const Function*>(GV));
165 Res = skipEmpty(Iter, *M);
169 Module::const_global_iterator Iter(static_cast<const GlobalVariable*>(GV));
171 Res = skipEmpty(Iter, *M);
175 Module::const_alias_iterator Iter(static_cast<const GlobalAlias*>(GV));
177 Res = skipEmpty(Iter, *M);
181 unsigned Index = getAsmSymIndex(Symb);
182 assert(Index < AsmSymbols.size());
184 Res = (Index << 2) | 3;
192 std::error_code IRObjectFile::printSymbolName(raw_ostream &OS,
193 DataRefImpl Symb) const {
194 const GlobalValue *GV = getGV(Symb);
196 unsigned Index = getAsmSymIndex(Symb);
197 assert(Index <= AsmSymbols.size());
198 OS << AsmSymbols[Index].first;
199 return object_error::success;;
203 Mang->getNameWithPrefix(OS, GV, false);
207 return object_error::success;
210 static bool isDeclaration(const GlobalValue &V) {
211 if (V.hasAvailableExternallyLinkage())
214 if (V.isMaterializable())
217 return V.isDeclaration();
220 uint32_t IRObjectFile::getSymbolFlags(DataRefImpl Symb) const {
221 const GlobalValue *GV = getGV(Symb);
224 unsigned Index = getAsmSymIndex(Symb);
225 assert(Index <= AsmSymbols.size());
226 return AsmSymbols[Index].second;
229 uint32_t Res = BasicSymbolRef::SF_None;
230 if (isDeclaration(*GV))
231 Res |= BasicSymbolRef::SF_Undefined;
232 if (GV->hasPrivateLinkage())
233 Res |= BasicSymbolRef::SF_FormatSpecific;
234 if (!GV->hasLocalLinkage())
235 Res |= BasicSymbolRef::SF_Global;
236 if (GV->hasCommonLinkage())
237 Res |= BasicSymbolRef::SF_Common;
238 if (GV->hasLinkOnceLinkage() || GV->hasWeakLinkage())
239 Res |= BasicSymbolRef::SF_Weak;
241 if (GV->getName().startswith("llvm."))
242 Res |= BasicSymbolRef::SF_FormatSpecific;
243 else if (auto *Var = dyn_cast<GlobalVariable>(GV)) {
244 if (Var->getSection() == StringRef("llvm.metadata"))
245 Res |= BasicSymbolRef::SF_FormatSpecific;
251 const GlobalValue *IRObjectFile::getSymbolGV(DataRefImpl Symb) const {
252 const GlobalValue *GV = getGV(Symb);
256 basic_symbol_iterator IRObjectFile::symbol_begin_impl() const {
257 Module::const_iterator I = M->begin();
259 Ret.p = skipEmpty(I, *M);
260 return basic_symbol_iterator(BasicSymbolRef(Ret, this));
263 basic_symbol_iterator IRObjectFile::symbol_end_impl() const {
265 uint64_t NumAsm = AsmSymbols.size();
268 return basic_symbol_iterator(BasicSymbolRef(Ret, this));
271 ErrorOr<IRObjectFile *> llvm::object::IRObjectFile::createIRObjectFile(
272 std::unique_ptr<MemoryBuffer> Object, LLVMContext &Context) {
273 ErrorOr<Module *> MOrErr = getLazyBitcodeModule(Object.get(), Context);
274 if (std::error_code EC = MOrErr.getError())
277 std::unique_ptr<Module> M(MOrErr.get());
278 return new IRObjectFile(std::move(Object), std::move(M));