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/Bitcode/ReaderWriter.h"
15 #include "llvm/IR/LLVMContext.h"
16 #include "llvm/IR/GVMaterializer.h"
17 #include "llvm/IR/Mangler.h"
18 #include "llvm/IR/Module.h"
19 #include "llvm/Object/IRObjectFile.h"
20 #include "llvm/Object/RecordStreamer.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::error_code &EC, LLVMContext &Context)
37 : SymbolicFile(Binary::ID_IR, std::move(Object)) {
38 ErrorOr<Module *> MOrErr = getLazyBitcodeModule(Data.get(), Context);
39 if ((EC = MOrErr.getError()))
42 M.reset(MOrErr.get());
44 // If we have a DataLayout, setup a mangler.
45 const DataLayout *DL = M->getDataLayout();
49 Mang.reset(new Mangler(DL));
51 const std::string &InlineAsm = M->getModuleInlineAsm();
52 if (InlineAsm.empty())
55 StringRef Triple = M->getTargetTriple();
57 const Target *T = TargetRegistry::lookupTarget(Triple, Err);
61 std::unique_ptr<MCRegisterInfo> MRI(T->createMCRegInfo(Triple));
65 std::unique_ptr<MCAsmInfo> MAI(T->createMCAsmInfo(*MRI, Triple));
69 std::unique_ptr<MCSubtargetInfo> STI(
70 T->createMCSubtargetInfo(Triple, "", ""));
74 std::unique_ptr<MCInstrInfo> MCII(T->createMCInstrInfo());
78 MCObjectFileInfo MOFI;
79 MCContext MCCtx(MAI.get(), MRI.get(), &MOFI);
80 MOFI.InitMCObjectFileInfo(Triple, Reloc::Default, CodeModel::Default, MCCtx);
81 std::unique_ptr<RecordStreamer> Streamer(new RecordStreamer(MCCtx));
83 std::unique_ptr<MemoryBuffer> Buffer(MemoryBuffer::getMemBuffer(InlineAsm));
85 SrcMgr.AddNewSourceBuffer(Buffer.release(), SMLoc());
86 std::unique_ptr<MCAsmParser> Parser(
87 createMCAsmParser(SrcMgr, MCCtx, *Streamer, *MAI));
89 MCTargetOptions MCOptions;
90 std::unique_ptr<MCTargetAsmParser> TAP(
91 T->createMCAsmParser(*STI, *Parser, *MCII, MCOptions));
95 Parser->setTargetParser(*TAP);
96 if (Parser->Run(false))
99 for (auto &KV : *Streamer) {
100 StringRef Key = KV.first();
101 RecordStreamer::State Value = KV.second;
102 uint32_t Res = BasicSymbolRef::SF_None;
104 case RecordStreamer::NeverSeen:
105 llvm_unreachable("foo");
106 case RecordStreamer::DefinedGlobal:
107 Res |= BasicSymbolRef::SF_Global;
109 case RecordStreamer::Defined:
111 case RecordStreamer::Global:
112 case RecordStreamer::Used:
113 Res |= BasicSymbolRef::SF_Undefined;
114 Res |= BasicSymbolRef::SF_Global;
117 AsmSymbols.push_back(
118 std::make_pair<std::string, uint32_t>(Key, std::move(Res)));
122 IRObjectFile::~IRObjectFile() { M->getMaterializer()->releaseBuffer(); }
124 static const GlobalValue *getGV(DataRefImpl &Symb) {
125 if ((Symb.p & 3) == 3)
128 return reinterpret_cast<GlobalValue*>(Symb.p & ~uintptr_t(3));
131 static uintptr_t skipEmpty(Module::const_alias_iterator I, const Module &M) {
132 if (I == M.alias_end())
134 const GlobalValue *GV = &*I;
135 return reinterpret_cast<uintptr_t>(GV) | 2;
138 static uintptr_t skipEmpty(Module::const_global_iterator I, const Module &M) {
139 if (I == M.global_end())
140 return skipEmpty(M.alias_begin(), M);
141 const GlobalValue *GV = &*I;
142 return reinterpret_cast<uintptr_t>(GV) | 1;
145 static uintptr_t skipEmpty(Module::const_iterator I, const Module &M) {
147 return skipEmpty(M.global_begin(), M);
148 const GlobalValue *GV = &*I;
149 return reinterpret_cast<uintptr_t>(GV) | 0;
152 static unsigned getAsmSymIndex(DataRefImpl Symb) {
153 assert((Symb.p & uintptr_t(3)) == 3);
154 uintptr_t Index = Symb.p & ~uintptr_t(3);
159 void IRObjectFile::moveSymbolNext(DataRefImpl &Symb) const {
160 const GlobalValue *GV = getGV(Symb);
163 switch (Symb.p & 3) {
165 Module::const_iterator Iter(static_cast<const Function*>(GV));
167 Res = skipEmpty(Iter, *M);
171 Module::const_global_iterator Iter(static_cast<const GlobalVariable*>(GV));
173 Res = skipEmpty(Iter, *M);
177 Module::const_alias_iterator Iter(static_cast<const GlobalAlias*>(GV));
179 Res = skipEmpty(Iter, *M);
183 unsigned Index = getAsmSymIndex(Symb);
184 assert(Index < AsmSymbols.size());
186 Res = (Index << 2) | 3;
194 std::error_code IRObjectFile::printSymbolName(raw_ostream &OS,
195 DataRefImpl Symb) const {
196 const GlobalValue *GV = getGV(Symb);
198 unsigned Index = getAsmSymIndex(Symb);
199 assert(Index <= AsmSymbols.size());
200 OS << AsmSymbols[Index].first;
201 return object_error::success;;
205 Mang->getNameWithPrefix(OS, GV, false);
209 return object_error::success;
212 static bool isDeclaration(const GlobalValue &V) {
213 if (V.hasAvailableExternallyLinkage())
216 if (V.isMaterializable())
219 return V.isDeclaration();
222 uint32_t IRObjectFile::getSymbolFlags(DataRefImpl Symb) const {
223 const GlobalValue *GV = getGV(Symb);
226 unsigned Index = getAsmSymIndex(Symb);
227 assert(Index <= AsmSymbols.size());
228 return AsmSymbols[Index].second;
231 uint32_t Res = BasicSymbolRef::SF_None;
232 if (isDeclaration(*GV))
233 Res |= BasicSymbolRef::SF_Undefined;
234 if (GV->hasPrivateLinkage())
235 Res |= BasicSymbolRef::SF_FormatSpecific;
236 if (!GV->hasLocalLinkage())
237 Res |= BasicSymbolRef::SF_Global;
238 if (GV->hasCommonLinkage())
239 Res |= BasicSymbolRef::SF_Common;
240 if (GV->hasLinkOnceLinkage() || GV->hasWeakLinkage())
241 Res |= BasicSymbolRef::SF_Weak;
243 if (auto *Var = dyn_cast<GlobalVariable>(GV)) {
244 if (Var->getSection() == StringRef("llvm.metadata"))
245 Res |= BasicSymbolRef::SF_FormatSpecific;
248 if (auto *F = dyn_cast<Function>(GV)) {
249 if (F->getName().startswith("llvm."))
250 Res |= BasicSymbolRef::SF_FormatSpecific;
256 const GlobalValue *IRObjectFile::getSymbolGV(DataRefImpl Symb) const {
257 const GlobalValue *GV = getGV(Symb);
261 basic_symbol_iterator IRObjectFile::symbol_begin_impl() const {
262 Module::const_iterator I = M->begin();
264 Ret.p = skipEmpty(I, *M);
265 return basic_symbol_iterator(BasicSymbolRef(Ret, this));
268 basic_symbol_iterator IRObjectFile::symbol_end_impl() const {
270 uint64_t NumAsm = AsmSymbols.size();
273 return basic_symbol_iterator(BasicSymbolRef(Ret, this));
276 ErrorOr<IRObjectFile *> llvm::object::IRObjectFile::createIRObjectFile(
277 std::unique_ptr<MemoryBuffer> Object, LLVMContext &Context) {
279 std::unique_ptr<IRObjectFile> Ret(
280 new IRObjectFile(std::move(Object), EC, Context));
283 return Ret.release();