File: | clang/lib/CodeGen/CodeGenModule.cpp |
Warning: | line 364, column 53 Called C++ object pointer is null |
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1 | //===--- CodeGenModule.cpp - Emit LLVM Code from ASTs for a Module --------===// | |||
2 | // | |||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | |||
4 | // See https://llvm.org/LICENSE.txt for license information. | |||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |||
6 | // | |||
7 | //===----------------------------------------------------------------------===// | |||
8 | // | |||
9 | // This coordinates the per-module state used while generating code. | |||
10 | // | |||
11 | //===----------------------------------------------------------------------===// | |||
12 | ||||
13 | #include "CodeGenModule.h" | |||
14 | #include "CGBlocks.h" | |||
15 | #include "CGCUDARuntime.h" | |||
16 | #include "CGCXXABI.h" | |||
17 | #include "CGCall.h" | |||
18 | #include "CGDebugInfo.h" | |||
19 | #include "CGObjCRuntime.h" | |||
20 | #include "CGOpenCLRuntime.h" | |||
21 | #include "CGOpenMPRuntime.h" | |||
22 | #include "CGOpenMPRuntimeNVPTX.h" | |||
23 | #include "CodeGenFunction.h" | |||
24 | #include "CodeGenPGO.h" | |||
25 | #include "ConstantEmitter.h" | |||
26 | #include "CoverageMappingGen.h" | |||
27 | #include "TargetInfo.h" | |||
28 | #include "clang/AST/ASTContext.h" | |||
29 | #include "clang/AST/CharUnits.h" | |||
30 | #include "clang/AST/DeclCXX.h" | |||
31 | #include "clang/AST/DeclObjC.h" | |||
32 | #include "clang/AST/DeclTemplate.h" | |||
33 | #include "clang/AST/Mangle.h" | |||
34 | #include "clang/AST/RecordLayout.h" | |||
35 | #include "clang/AST/RecursiveASTVisitor.h" | |||
36 | #include "clang/AST/StmtVisitor.h" | |||
37 | #include "clang/Basic/Builtins.h" | |||
38 | #include "clang/Basic/CharInfo.h" | |||
39 | #include "clang/Basic/CodeGenOptions.h" | |||
40 | #include "clang/Basic/Diagnostic.h" | |||
41 | #include "clang/Basic/Module.h" | |||
42 | #include "clang/Basic/SourceManager.h" | |||
43 | #include "clang/Basic/TargetInfo.h" | |||
44 | #include "clang/Basic/Version.h" | |||
45 | #include "clang/CodeGen/ConstantInitBuilder.h" | |||
46 | #include "clang/Frontend/FrontendDiagnostic.h" | |||
47 | #include "llvm/ADT/StringSwitch.h" | |||
48 | #include "llvm/ADT/Triple.h" | |||
49 | #include "llvm/Analysis/TargetLibraryInfo.h" | |||
50 | #include "llvm/IR/CallingConv.h" | |||
51 | #include "llvm/IR/DataLayout.h" | |||
52 | #include "llvm/IR/Intrinsics.h" | |||
53 | #include "llvm/IR/LLVMContext.h" | |||
54 | #include "llvm/IR/Module.h" | |||
55 | #include "llvm/IR/ProfileSummary.h" | |||
56 | #include "llvm/ProfileData/InstrProfReader.h" | |||
57 | #include "llvm/Support/CodeGen.h" | |||
58 | #include "llvm/Support/ConvertUTF.h" | |||
59 | #include "llvm/Support/ErrorHandling.h" | |||
60 | #include "llvm/Support/MD5.h" | |||
61 | #include "llvm/Support/TimeProfiler.h" | |||
62 | ||||
63 | using namespace clang; | |||
64 | using namespace CodeGen; | |||
65 | ||||
66 | static llvm::cl::opt<bool> LimitedCoverage( | |||
67 | "limited-coverage-experimental", llvm::cl::ZeroOrMore, llvm::cl::Hidden, | |||
68 | llvm::cl::desc("Emit limited coverage mapping information (experimental)"), | |||
69 | llvm::cl::init(false)); | |||
70 | ||||
71 | static const char AnnotationSection[] = "llvm.metadata"; | |||
72 | ||||
73 | static CGCXXABI *createCXXABI(CodeGenModule &CGM) { | |||
74 | switch (CGM.getTarget().getCXXABI().getKind()) { | |||
75 | case TargetCXXABI::GenericAArch64: | |||
76 | case TargetCXXABI::GenericARM: | |||
77 | case TargetCXXABI::iOS: | |||
78 | case TargetCXXABI::iOS64: | |||
79 | case TargetCXXABI::WatchOS: | |||
80 | case TargetCXXABI::GenericMIPS: | |||
81 | case TargetCXXABI::GenericItanium: | |||
82 | case TargetCXXABI::WebAssembly: | |||
83 | return CreateItaniumCXXABI(CGM); | |||
84 | case TargetCXXABI::Microsoft: | |||
85 | return CreateMicrosoftCXXABI(CGM); | |||
86 | } | |||
87 | ||||
88 | llvm_unreachable("invalid C++ ABI kind")::llvm::llvm_unreachable_internal("invalid C++ ABI kind", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 88); | |||
89 | } | |||
90 | ||||
91 | CodeGenModule::CodeGenModule(ASTContext &C, const HeaderSearchOptions &HSO, | |||
92 | const PreprocessorOptions &PPO, | |||
93 | const CodeGenOptions &CGO, llvm::Module &M, | |||
94 | DiagnosticsEngine &diags, | |||
95 | CoverageSourceInfo *CoverageInfo) | |||
96 | : Context(C), LangOpts(C.getLangOpts()), HeaderSearchOpts(HSO), | |||
97 | PreprocessorOpts(PPO), CodeGenOpts(CGO), TheModule(M), Diags(diags), | |||
98 | Target(C.getTargetInfo()), ABI(createCXXABI(*this)), | |||
99 | VMContext(M.getContext()), Types(*this), VTables(*this), | |||
100 | SanitizerMD(new SanitizerMetadata(*this)) { | |||
101 | ||||
102 | // Initialize the type cache. | |||
103 | llvm::LLVMContext &LLVMContext = M.getContext(); | |||
104 | VoidTy = llvm::Type::getVoidTy(LLVMContext); | |||
105 | Int8Ty = llvm::Type::getInt8Ty(LLVMContext); | |||
106 | Int16Ty = llvm::Type::getInt16Ty(LLVMContext); | |||
107 | Int32Ty = llvm::Type::getInt32Ty(LLVMContext); | |||
108 | Int64Ty = llvm::Type::getInt64Ty(LLVMContext); | |||
109 | HalfTy = llvm::Type::getHalfTy(LLVMContext); | |||
110 | FloatTy = llvm::Type::getFloatTy(LLVMContext); | |||
111 | DoubleTy = llvm::Type::getDoubleTy(LLVMContext); | |||
112 | PointerWidthInBits = C.getTargetInfo().getPointerWidth(0); | |||
113 | PointerAlignInBytes = | |||
114 | C.toCharUnitsFromBits(C.getTargetInfo().getPointerAlign(0)).getQuantity(); | |||
115 | SizeSizeInBytes = | |||
116 | C.toCharUnitsFromBits(C.getTargetInfo().getMaxPointerWidth()).getQuantity(); | |||
117 | IntAlignInBytes = | |||
118 | C.toCharUnitsFromBits(C.getTargetInfo().getIntAlign()).getQuantity(); | |||
119 | IntTy = llvm::IntegerType::get(LLVMContext, C.getTargetInfo().getIntWidth()); | |||
120 | IntPtrTy = llvm::IntegerType::get(LLVMContext, | |||
121 | C.getTargetInfo().getMaxPointerWidth()); | |||
122 | Int8PtrTy = Int8Ty->getPointerTo(0); | |||
123 | Int8PtrPtrTy = Int8PtrTy->getPointerTo(0); | |||
124 | AllocaInt8PtrTy = Int8Ty->getPointerTo( | |||
125 | M.getDataLayout().getAllocaAddrSpace()); | |||
126 | ASTAllocaAddressSpace = getTargetCodeGenInfo().getASTAllocaAddressSpace(); | |||
127 | ||||
128 | RuntimeCC = getTargetCodeGenInfo().getABIInfo().getRuntimeCC(); | |||
129 | ||||
130 | if (LangOpts.ObjC) | |||
131 | createObjCRuntime(); | |||
132 | if (LangOpts.OpenCL) | |||
133 | createOpenCLRuntime(); | |||
134 | if (LangOpts.OpenMP) | |||
135 | createOpenMPRuntime(); | |||
136 | if (LangOpts.CUDA) | |||
137 | createCUDARuntime(); | |||
138 | ||||
139 | // Enable TBAA unless it's suppressed. ThreadSanitizer needs TBAA even at O0. | |||
140 | if (LangOpts.Sanitize.has(SanitizerKind::Thread) || | |||
141 | (!CodeGenOpts.RelaxedAliasing && CodeGenOpts.OptimizationLevel > 0)) | |||
142 | TBAA.reset(new CodeGenTBAA(Context, TheModule, CodeGenOpts, getLangOpts(), | |||
143 | getCXXABI().getMangleContext())); | |||
144 | ||||
145 | // If debug info or coverage generation is enabled, create the CGDebugInfo | |||
146 | // object. | |||
147 | if (CodeGenOpts.getDebugInfo() != codegenoptions::NoDebugInfo || | |||
148 | CodeGenOpts.EmitGcovArcs || CodeGenOpts.EmitGcovNotes) | |||
149 | DebugInfo.reset(new CGDebugInfo(*this)); | |||
150 | ||||
151 | Block.GlobalUniqueCount = 0; | |||
152 | ||||
153 | if (C.getLangOpts().ObjC) | |||
154 | ObjCData.reset(new ObjCEntrypoints()); | |||
155 | ||||
156 | if (CodeGenOpts.hasProfileClangUse()) { | |||
157 | auto ReaderOrErr = llvm::IndexedInstrProfReader::create( | |||
158 | CodeGenOpts.ProfileInstrumentUsePath, CodeGenOpts.ProfileRemappingFile); | |||
159 | if (auto E = ReaderOrErr.takeError()) { | |||
160 | unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error, | |||
161 | "Could not read profile %0: %1"); | |||
162 | llvm::handleAllErrors(std::move(E), [&](const llvm::ErrorInfoBase &EI) { | |||
163 | getDiags().Report(DiagID) << CodeGenOpts.ProfileInstrumentUsePath | |||
164 | << EI.message(); | |||
165 | }); | |||
166 | } else | |||
167 | PGOReader = std::move(ReaderOrErr.get()); | |||
168 | } | |||
169 | ||||
170 | // If coverage mapping generation is enabled, create the | |||
171 | // CoverageMappingModuleGen object. | |||
172 | if (CodeGenOpts.CoverageMapping) | |||
173 | CoverageMapping.reset(new CoverageMappingModuleGen(*this, *CoverageInfo)); | |||
174 | } | |||
175 | ||||
176 | CodeGenModule::~CodeGenModule() {} | |||
177 | ||||
178 | void CodeGenModule::createObjCRuntime() { | |||
179 | // This is just isGNUFamily(), but we want to force implementors of | |||
180 | // new ABIs to decide how best to do this. | |||
181 | switch (LangOpts.ObjCRuntime.getKind()) { | |||
182 | case ObjCRuntime::GNUstep: | |||
183 | case ObjCRuntime::GCC: | |||
184 | case ObjCRuntime::ObjFW: | |||
185 | ObjCRuntime.reset(CreateGNUObjCRuntime(*this)); | |||
186 | return; | |||
187 | ||||
188 | case ObjCRuntime::FragileMacOSX: | |||
189 | case ObjCRuntime::MacOSX: | |||
190 | case ObjCRuntime::iOS: | |||
191 | case ObjCRuntime::WatchOS: | |||
192 | ObjCRuntime.reset(CreateMacObjCRuntime(*this)); | |||
193 | return; | |||
194 | } | |||
195 | llvm_unreachable("bad runtime kind")::llvm::llvm_unreachable_internal("bad runtime kind", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 195); | |||
196 | } | |||
197 | ||||
198 | void CodeGenModule::createOpenCLRuntime() { | |||
199 | OpenCLRuntime.reset(new CGOpenCLRuntime(*this)); | |||
200 | } | |||
201 | ||||
202 | void CodeGenModule::createOpenMPRuntime() { | |||
203 | // Select a specialized code generation class based on the target, if any. | |||
204 | // If it does not exist use the default implementation. | |||
205 | switch (getTriple().getArch()) { | |||
206 | case llvm::Triple::nvptx: | |||
207 | case llvm::Triple::nvptx64: | |||
208 | assert(getLangOpts().OpenMPIsDevice &&((getLangOpts().OpenMPIsDevice && "OpenMP NVPTX is only prepared to deal with device code." ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().OpenMPIsDevice && \"OpenMP NVPTX is only prepared to deal with device code.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 209, __PRETTY_FUNCTION__)) | |||
209 | "OpenMP NVPTX is only prepared to deal with device code.")((getLangOpts().OpenMPIsDevice && "OpenMP NVPTX is only prepared to deal with device code." ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().OpenMPIsDevice && \"OpenMP NVPTX is only prepared to deal with device code.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 209, __PRETTY_FUNCTION__)); | |||
210 | OpenMPRuntime.reset(new CGOpenMPRuntimeNVPTX(*this)); | |||
211 | break; | |||
212 | default: | |||
213 | if (LangOpts.OpenMPSimd) | |||
214 | OpenMPRuntime.reset(new CGOpenMPSIMDRuntime(*this)); | |||
215 | else | |||
216 | OpenMPRuntime.reset(new CGOpenMPRuntime(*this)); | |||
217 | break; | |||
218 | } | |||
219 | } | |||
220 | ||||
221 | void CodeGenModule::createCUDARuntime() { | |||
222 | CUDARuntime.reset(CreateNVCUDARuntime(*this)); | |||
223 | } | |||
224 | ||||
225 | void CodeGenModule::addReplacement(StringRef Name, llvm::Constant *C) { | |||
226 | Replacements[Name] = C; | |||
227 | } | |||
228 | ||||
229 | void CodeGenModule::applyReplacements() { | |||
230 | for (auto &I : Replacements) { | |||
231 | StringRef MangledName = I.first(); | |||
232 | llvm::Constant *Replacement = I.second; | |||
233 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
234 | if (!Entry) | |||
235 | continue; | |||
236 | auto *OldF = cast<llvm::Function>(Entry); | |||
237 | auto *NewF = dyn_cast<llvm::Function>(Replacement); | |||
238 | if (!NewF) { | |||
239 | if (auto *Alias = dyn_cast<llvm::GlobalAlias>(Replacement)) { | |||
240 | NewF = dyn_cast<llvm::Function>(Alias->getAliasee()); | |||
241 | } else { | |||
242 | auto *CE = cast<llvm::ConstantExpr>(Replacement); | |||
243 | assert(CE->getOpcode() == llvm::Instruction::BitCast ||((CE->getOpcode() == llvm::Instruction::BitCast || CE-> getOpcode() == llvm::Instruction::GetElementPtr) ? static_cast <void> (0) : __assert_fail ("CE->getOpcode() == llvm::Instruction::BitCast || CE->getOpcode() == llvm::Instruction::GetElementPtr" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 244, __PRETTY_FUNCTION__)) | |||
244 | CE->getOpcode() == llvm::Instruction::GetElementPtr)((CE->getOpcode() == llvm::Instruction::BitCast || CE-> getOpcode() == llvm::Instruction::GetElementPtr) ? static_cast <void> (0) : __assert_fail ("CE->getOpcode() == llvm::Instruction::BitCast || CE->getOpcode() == llvm::Instruction::GetElementPtr" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 244, __PRETTY_FUNCTION__)); | |||
245 | NewF = dyn_cast<llvm::Function>(CE->getOperand(0)); | |||
246 | } | |||
247 | } | |||
248 | ||||
249 | // Replace old with new, but keep the old order. | |||
250 | OldF->replaceAllUsesWith(Replacement); | |||
251 | if (NewF) { | |||
252 | NewF->removeFromParent(); | |||
253 | OldF->getParent()->getFunctionList().insertAfter(OldF->getIterator(), | |||
254 | NewF); | |||
255 | } | |||
256 | OldF->eraseFromParent(); | |||
257 | } | |||
258 | } | |||
259 | ||||
260 | void CodeGenModule::addGlobalValReplacement(llvm::GlobalValue *GV, llvm::Constant *C) { | |||
261 | GlobalValReplacements.push_back(std::make_pair(GV, C)); | |||
262 | } | |||
263 | ||||
264 | void CodeGenModule::applyGlobalValReplacements() { | |||
265 | for (auto &I : GlobalValReplacements) { | |||
266 | llvm::GlobalValue *GV = I.first; | |||
267 | llvm::Constant *C = I.second; | |||
268 | ||||
269 | GV->replaceAllUsesWith(C); | |||
270 | GV->eraseFromParent(); | |||
271 | } | |||
272 | } | |||
273 | ||||
274 | // This is only used in aliases that we created and we know they have a | |||
275 | // linear structure. | |||
276 | static const llvm::GlobalObject *getAliasedGlobal( | |||
277 | const llvm::GlobalIndirectSymbol &GIS) { | |||
278 | llvm::SmallPtrSet<const llvm::GlobalIndirectSymbol*, 4> Visited; | |||
279 | const llvm::Constant *C = &GIS; | |||
280 | for (;;) { | |||
281 | C = C->stripPointerCasts(); | |||
282 | if (auto *GO
| |||
283 | return GO; | |||
284 | // stripPointerCasts will not walk over weak aliases. | |||
285 | auto *GIS2 = dyn_cast<llvm::GlobalIndirectSymbol>(C); | |||
286 | if (!GIS2
| |||
287 | return nullptr; | |||
288 | if (!Visited.insert(GIS2).second) | |||
289 | return nullptr; | |||
290 | C = GIS2->getIndirectSymbol(); | |||
291 | } | |||
292 | } | |||
293 | ||||
294 | void CodeGenModule::checkAliases() { | |||
295 | // Check if the constructed aliases are well formed. It is really unfortunate | |||
296 | // that we have to do this in CodeGen, but we only construct mangled names | |||
297 | // and aliases during codegen. | |||
298 | bool Error = false; | |||
299 | DiagnosticsEngine &Diags = getDiags(); | |||
300 | for (const GlobalDecl &GD : Aliases) { | |||
301 | const auto *D = cast<ValueDecl>(GD.getDecl()); | |||
302 | SourceLocation Location; | |||
303 | bool IsIFunc = D->hasAttr<IFuncAttr>(); | |||
304 | if (const Attr *A = D->getDefiningAttr()) | |||
305 | Location = A->getLocation(); | |||
306 | else | |||
307 | llvm_unreachable("Not an alias or ifunc?")::llvm::llvm_unreachable_internal("Not an alias or ifunc?", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 307); | |||
308 | StringRef MangledName = getMangledName(GD); | |||
309 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
310 | auto *Alias = cast<llvm::GlobalIndirectSymbol>(Entry); | |||
311 | const llvm::GlobalValue *GV = getAliasedGlobal(*Alias); | |||
312 | if (!GV
| |||
313 | Error = true; | |||
314 | Diags.Report(Location, diag::err_cyclic_alias) << IsIFunc; | |||
315 | } else if (GV->isDeclaration()) { | |||
316 | Error = true; | |||
317 | Diags.Report(Location, diag::err_alias_to_undefined) | |||
318 | << IsIFunc << IsIFunc; | |||
319 | } else if (IsIFunc) { | |||
320 | // Check resolver function type. | |||
321 | llvm::FunctionType *FTy = dyn_cast<llvm::FunctionType>( | |||
322 | GV->getType()->getPointerElementType()); | |||
323 | assert(FTy)((FTy) ? static_cast<void> (0) : __assert_fail ("FTy", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 323, __PRETTY_FUNCTION__)); | |||
324 | if (!FTy->getReturnType()->isPointerTy()) | |||
325 | Diags.Report(Location, diag::err_ifunc_resolver_return); | |||
326 | } | |||
327 | ||||
328 | llvm::Constant *Aliasee = Alias->getIndirectSymbol(); | |||
329 | llvm::GlobalValue *AliaseeGV; | |||
330 | if (auto CE = dyn_cast<llvm::ConstantExpr>(Aliasee)) | |||
331 | AliaseeGV = cast<llvm::GlobalValue>(CE->getOperand(0)); | |||
332 | else | |||
333 | AliaseeGV = cast<llvm::GlobalValue>(Aliasee); | |||
334 | ||||
335 | if (const SectionAttr *SA
| |||
336 | StringRef AliasSection = SA->getName(); | |||
337 | if (AliasSection != AliaseeGV->getSection()) | |||
338 | Diags.Report(SA->getLocation(), diag::warn_alias_with_section) | |||
339 | << AliasSection << IsIFunc << IsIFunc; | |||
340 | } | |||
341 | ||||
342 | // We have to handle alias to weak aliases in here. LLVM itself disallows | |||
343 | // this since the object semantics would not match the IL one. For | |||
344 | // compatibility with gcc we implement it by just pointing the alias | |||
345 | // to its aliasee's aliasee. We also warn, since the user is probably | |||
346 | // expecting the link to be weak. | |||
347 | if (auto GA
| |||
348 | if (GA->isInterposable()) { | |||
349 | Diags.Report(Location, diag::warn_alias_to_weak_alias) | |||
350 | << GV->getName() << GA->getName() << IsIFunc; | |||
351 | Aliasee = llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast( | |||
352 | GA->getIndirectSymbol(), Alias->getType()); | |||
353 | Alias->setIndirectSymbol(Aliasee); | |||
354 | } | |||
355 | } | |||
356 | } | |||
357 | if (!Error
| |||
358 | return; | |||
359 | ||||
360 | for (const GlobalDecl &GD : Aliases) { | |||
361 | StringRef MangledName = getMangledName(GD); | |||
362 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
363 | auto *Alias = dyn_cast<llvm::GlobalIndirectSymbol>(Entry); | |||
364 | Alias->replaceAllUsesWith(llvm::UndefValue::get(Alias->getType())); | |||
| ||||
365 | Alias->eraseFromParent(); | |||
366 | } | |||
367 | } | |||
368 | ||||
369 | void CodeGenModule::clear() { | |||
370 | DeferredDeclsToEmit.clear(); | |||
371 | if (OpenMPRuntime) | |||
372 | OpenMPRuntime->clear(); | |||
373 | } | |||
374 | ||||
375 | void InstrProfStats::reportDiagnostics(DiagnosticsEngine &Diags, | |||
376 | StringRef MainFile) { | |||
377 | if (!hasDiagnostics()) | |||
378 | return; | |||
379 | if (VisitedInMainFile > 0 && VisitedInMainFile == MissingInMainFile) { | |||
380 | if (MainFile.empty()) | |||
381 | MainFile = "<stdin>"; | |||
382 | Diags.Report(diag::warn_profile_data_unprofiled) << MainFile; | |||
383 | } else { | |||
384 | if (Mismatched > 0) | |||
385 | Diags.Report(diag::warn_profile_data_out_of_date) << Visited << Mismatched; | |||
386 | ||||
387 | if (Missing > 0) | |||
388 | Diags.Report(diag::warn_profile_data_missing) << Visited << Missing; | |||
389 | } | |||
390 | } | |||
391 | ||||
392 | void CodeGenModule::Release() { | |||
393 | EmitDeferred(); | |||
394 | EmitVTablesOpportunistically(); | |||
395 | applyGlobalValReplacements(); | |||
396 | applyReplacements(); | |||
397 | checkAliases(); | |||
| ||||
398 | emitMultiVersionFunctions(); | |||
399 | EmitCXXGlobalInitFunc(); | |||
400 | EmitCXXGlobalDtorFunc(); | |||
401 | registerGlobalDtorsWithAtExit(); | |||
402 | EmitCXXThreadLocalInitFunc(); | |||
403 | if (ObjCRuntime) | |||
404 | if (llvm::Function *ObjCInitFunction = ObjCRuntime->ModuleInitFunction()) | |||
405 | AddGlobalCtor(ObjCInitFunction); | |||
406 | if (Context.getLangOpts().CUDA && !Context.getLangOpts().CUDAIsDevice && | |||
407 | CUDARuntime) { | |||
408 | if (llvm::Function *CudaCtorFunction = | |||
409 | CUDARuntime->makeModuleCtorFunction()) | |||
410 | AddGlobalCtor(CudaCtorFunction); | |||
411 | } | |||
412 | if (OpenMPRuntime) { | |||
413 | if (llvm::Function *OpenMPRequiresDirectiveRegFun = | |||
414 | OpenMPRuntime->emitRequiresDirectiveRegFun()) { | |||
415 | AddGlobalCtor(OpenMPRequiresDirectiveRegFun, 0); | |||
416 | } | |||
417 | OpenMPRuntime->createOffloadEntriesAndInfoMetadata(); | |||
418 | OpenMPRuntime->clear(); | |||
419 | } | |||
420 | if (PGOReader) { | |||
421 | getModule().setProfileSummary( | |||
422 | PGOReader->getSummary(/* UseCS */ false).getMD(VMContext), | |||
423 | llvm::ProfileSummary::PSK_Instr); | |||
424 | if (PGOStats.hasDiagnostics()) | |||
425 | PGOStats.reportDiagnostics(getDiags(), getCodeGenOpts().MainFileName); | |||
426 | } | |||
427 | EmitCtorList(GlobalCtors, "llvm.global_ctors"); | |||
428 | EmitCtorList(GlobalDtors, "llvm.global_dtors"); | |||
429 | EmitGlobalAnnotations(); | |||
430 | EmitStaticExternCAliases(); | |||
431 | EmitDeferredUnusedCoverageMappings(); | |||
432 | if (CoverageMapping) | |||
433 | CoverageMapping->emit(); | |||
434 | if (CodeGenOpts.SanitizeCfiCrossDso) { | |||
435 | CodeGenFunction(*this).EmitCfiCheckFail(); | |||
436 | CodeGenFunction(*this).EmitCfiCheckStub(); | |||
437 | } | |||
438 | emitAtAvailableLinkGuard(); | |||
439 | emitLLVMUsed(); | |||
440 | if (SanStats) | |||
441 | SanStats->finish(); | |||
442 | ||||
443 | if (CodeGenOpts.Autolink && | |||
444 | (Context.getLangOpts().Modules || !LinkerOptionsMetadata.empty())) { | |||
445 | EmitModuleLinkOptions(); | |||
446 | } | |||
447 | ||||
448 | // On ELF we pass the dependent library specifiers directly to the linker | |||
449 | // without manipulating them. This is in contrast to other platforms where | |||
450 | // they are mapped to a specific linker option by the compiler. This | |||
451 | // difference is a result of the greater variety of ELF linkers and the fact | |||
452 | // that ELF linkers tend to handle libraries in a more complicated fashion | |||
453 | // than on other platforms. This forces us to defer handling the dependent | |||
454 | // libs to the linker. | |||
455 | // | |||
456 | // CUDA/HIP device and host libraries are different. Currently there is no | |||
457 | // way to differentiate dependent libraries for host or device. Existing | |||
458 | // usage of #pragma comment(lib, *) is intended for host libraries on | |||
459 | // Windows. Therefore emit llvm.dependent-libraries only for host. | |||
460 | if (!ELFDependentLibraries.empty() && !Context.getLangOpts().CUDAIsDevice) { | |||
461 | auto *NMD = getModule().getOrInsertNamedMetadata("llvm.dependent-libraries"); | |||
462 | for (auto *MD : ELFDependentLibraries) | |||
463 | NMD->addOperand(MD); | |||
464 | } | |||
465 | ||||
466 | // Record mregparm value now so it is visible through rest of codegen. | |||
467 | if (Context.getTargetInfo().getTriple().getArch() == llvm::Triple::x86) | |||
468 | getModule().addModuleFlag(llvm::Module::Error, "NumRegisterParameters", | |||
469 | CodeGenOpts.NumRegisterParameters); | |||
470 | ||||
471 | if (CodeGenOpts.DwarfVersion) { | |||
472 | // We actually want the latest version when there are conflicts. | |||
473 | // We can change from Warning to Latest if such mode is supported. | |||
474 | getModule().addModuleFlag(llvm::Module::Warning, "Dwarf Version", | |||
475 | CodeGenOpts.DwarfVersion); | |||
476 | } | |||
477 | if (CodeGenOpts.EmitCodeView) { | |||
478 | // Indicate that we want CodeView in the metadata. | |||
479 | getModule().addModuleFlag(llvm::Module::Warning, "CodeView", 1); | |||
480 | } | |||
481 | if (CodeGenOpts.CodeViewGHash) { | |||
482 | getModule().addModuleFlag(llvm::Module::Warning, "CodeViewGHash", 1); | |||
483 | } | |||
484 | if (CodeGenOpts.ControlFlowGuard) { | |||
485 | // Function ID tables and checks for Control Flow Guard (cfguard=2). | |||
486 | getModule().addModuleFlag(llvm::Module::Warning, "cfguard", 2); | |||
487 | } else if (CodeGenOpts.ControlFlowGuardNoChecks) { | |||
488 | // Function ID tables for Control Flow Guard (cfguard=1). | |||
489 | getModule().addModuleFlag(llvm::Module::Warning, "cfguard", 1); | |||
490 | } | |||
491 | if (CodeGenOpts.OptimizationLevel > 0 && CodeGenOpts.StrictVTablePointers) { | |||
492 | // We don't support LTO with 2 with different StrictVTablePointers | |||
493 | // FIXME: we could support it by stripping all the information introduced | |||
494 | // by StrictVTablePointers. | |||
495 | ||||
496 | getModule().addModuleFlag(llvm::Module::Error, "StrictVTablePointers",1); | |||
497 | ||||
498 | llvm::Metadata *Ops[2] = { | |||
499 | llvm::MDString::get(VMContext, "StrictVTablePointers"), | |||
500 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( | |||
501 | llvm::Type::getInt32Ty(VMContext), 1))}; | |||
502 | ||||
503 | getModule().addModuleFlag(llvm::Module::Require, | |||
504 | "StrictVTablePointersRequirement", | |||
505 | llvm::MDNode::get(VMContext, Ops)); | |||
506 | } | |||
507 | if (DebugInfo) | |||
508 | // We support a single version in the linked module. The LLVM | |||
509 | // parser will drop debug info with a different version number | |||
510 | // (and warn about it, too). | |||
511 | getModule().addModuleFlag(llvm::Module::Warning, "Debug Info Version", | |||
512 | llvm::DEBUG_METADATA_VERSION); | |||
513 | ||||
514 | // We need to record the widths of enums and wchar_t, so that we can generate | |||
515 | // the correct build attributes in the ARM backend. wchar_size is also used by | |||
516 | // TargetLibraryInfo. | |||
517 | uint64_t WCharWidth = | |||
518 | Context.getTypeSizeInChars(Context.getWideCharType()).getQuantity(); | |||
519 | getModule().addModuleFlag(llvm::Module::Error, "wchar_size", WCharWidth); | |||
520 | ||||
521 | llvm::Triple::ArchType Arch = Context.getTargetInfo().getTriple().getArch(); | |||
522 | if ( Arch == llvm::Triple::arm | |||
523 | || Arch == llvm::Triple::armeb | |||
524 | || Arch == llvm::Triple::thumb | |||
525 | || Arch == llvm::Triple::thumbeb) { | |||
526 | // The minimum width of an enum in bytes | |||
527 | uint64_t EnumWidth = Context.getLangOpts().ShortEnums ? 1 : 4; | |||
528 | getModule().addModuleFlag(llvm::Module::Error, "min_enum_size", EnumWidth); | |||
529 | } | |||
530 | ||||
531 | if (CodeGenOpts.SanitizeCfiCrossDso) { | |||
532 | // Indicate that we want cross-DSO control flow integrity checks. | |||
533 | getModule().addModuleFlag(llvm::Module::Override, "Cross-DSO CFI", 1); | |||
534 | } | |||
535 | ||||
536 | if (LangOpts.Sanitize.has(SanitizerKind::CFIICall)) { | |||
537 | getModule().addModuleFlag(llvm::Module::Override, | |||
538 | "CFI Canonical Jump Tables", | |||
539 | CodeGenOpts.SanitizeCfiCanonicalJumpTables); | |||
540 | } | |||
541 | ||||
542 | if (CodeGenOpts.CFProtectionReturn && | |||
543 | Target.checkCFProtectionReturnSupported(getDiags())) { | |||
544 | // Indicate that we want to instrument return control flow protection. | |||
545 | getModule().addModuleFlag(llvm::Module::Override, "cf-protection-return", | |||
546 | 1); | |||
547 | } | |||
548 | ||||
549 | if (CodeGenOpts.CFProtectionBranch && | |||
550 | Target.checkCFProtectionBranchSupported(getDiags())) { | |||
551 | // Indicate that we want to instrument branch control flow protection. | |||
552 | getModule().addModuleFlag(llvm::Module::Override, "cf-protection-branch", | |||
553 | 1); | |||
554 | } | |||
555 | ||||
556 | if (LangOpts.CUDAIsDevice && getTriple().isNVPTX()) { | |||
557 | // Indicate whether __nvvm_reflect should be configured to flush denormal | |||
558 | // floating point values to 0. (This corresponds to its "__CUDA_FTZ" | |||
559 | // property.) | |||
560 | getModule().addModuleFlag(llvm::Module::Override, "nvvm-reflect-ftz", | |||
561 | CodeGenOpts.FlushDenorm ? 1 : 0); | |||
562 | } | |||
563 | ||||
564 | // Emit OpenCL specific module metadata: OpenCL/SPIR version. | |||
565 | if (LangOpts.OpenCL) { | |||
566 | EmitOpenCLMetadata(); | |||
567 | // Emit SPIR version. | |||
568 | if (getTriple().isSPIR()) { | |||
569 | // SPIR v2.0 s2.12 - The SPIR version used by the module is stored in the | |||
570 | // opencl.spir.version named metadata. | |||
571 | // C++ is backwards compatible with OpenCL v2.0. | |||
572 | auto Version = LangOpts.OpenCLCPlusPlus ? 200 : LangOpts.OpenCLVersion; | |||
573 | llvm::Metadata *SPIRVerElts[] = { | |||
574 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( | |||
575 | Int32Ty, Version / 100)), | |||
576 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( | |||
577 | Int32Ty, (Version / 100 > 1) ? 0 : 2))}; | |||
578 | llvm::NamedMDNode *SPIRVerMD = | |||
579 | TheModule.getOrInsertNamedMetadata("opencl.spir.version"); | |||
580 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
581 | SPIRVerMD->addOperand(llvm::MDNode::get(Ctx, SPIRVerElts)); | |||
582 | } | |||
583 | } | |||
584 | ||||
585 | if (uint32_t PLevel = Context.getLangOpts().PICLevel) { | |||
586 | assert(PLevel < 3 && "Invalid PIC Level")((PLevel < 3 && "Invalid PIC Level") ? static_cast <void> (0) : __assert_fail ("PLevel < 3 && \"Invalid PIC Level\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 586, __PRETTY_FUNCTION__)); | |||
587 | getModule().setPICLevel(static_cast<llvm::PICLevel::Level>(PLevel)); | |||
588 | if (Context.getLangOpts().PIE) | |||
589 | getModule().setPIELevel(static_cast<llvm::PIELevel::Level>(PLevel)); | |||
590 | } | |||
591 | ||||
592 | if (getCodeGenOpts().CodeModel.size() > 0) { | |||
593 | unsigned CM = llvm::StringSwitch<unsigned>(getCodeGenOpts().CodeModel) | |||
594 | .Case("tiny", llvm::CodeModel::Tiny) | |||
595 | .Case("small", llvm::CodeModel::Small) | |||
596 | .Case("kernel", llvm::CodeModel::Kernel) | |||
597 | .Case("medium", llvm::CodeModel::Medium) | |||
598 | .Case("large", llvm::CodeModel::Large) | |||
599 | .Default(~0u); | |||
600 | if (CM != ~0u) { | |||
601 | llvm::CodeModel::Model codeModel = static_cast<llvm::CodeModel::Model>(CM); | |||
602 | getModule().setCodeModel(codeModel); | |||
603 | } | |||
604 | } | |||
605 | ||||
606 | if (CodeGenOpts.NoPLT) | |||
607 | getModule().setRtLibUseGOT(); | |||
608 | ||||
609 | SimplifyPersonality(); | |||
610 | ||||
611 | if (getCodeGenOpts().EmitDeclMetadata) | |||
612 | EmitDeclMetadata(); | |||
613 | ||||
614 | if (getCodeGenOpts().EmitGcovArcs || getCodeGenOpts().EmitGcovNotes) | |||
615 | EmitCoverageFile(); | |||
616 | ||||
617 | if (DebugInfo) | |||
618 | DebugInfo->finalize(); | |||
619 | ||||
620 | if (getCodeGenOpts().EmitVersionIdentMetadata) | |||
621 | EmitVersionIdentMetadata(); | |||
622 | ||||
623 | if (!getCodeGenOpts().RecordCommandLine.empty()) | |||
624 | EmitCommandLineMetadata(); | |||
625 | ||||
626 | EmitTargetMetadata(); | |||
627 | } | |||
628 | ||||
629 | void CodeGenModule::EmitOpenCLMetadata() { | |||
630 | // SPIR v2.0 s2.13 - The OpenCL version used by the module is stored in the | |||
631 | // opencl.ocl.version named metadata node. | |||
632 | // C++ is backwards compatible with OpenCL v2.0. | |||
633 | // FIXME: We might need to add CXX version at some point too? | |||
634 | auto Version = LangOpts.OpenCLCPlusPlus ? 200 : LangOpts.OpenCLVersion; | |||
635 | llvm::Metadata *OCLVerElts[] = { | |||
636 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( | |||
637 | Int32Ty, Version / 100)), | |||
638 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( | |||
639 | Int32Ty, (Version % 100) / 10))}; | |||
640 | llvm::NamedMDNode *OCLVerMD = | |||
641 | TheModule.getOrInsertNamedMetadata("opencl.ocl.version"); | |||
642 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
643 | OCLVerMD->addOperand(llvm::MDNode::get(Ctx, OCLVerElts)); | |||
644 | } | |||
645 | ||||
646 | void CodeGenModule::UpdateCompletedType(const TagDecl *TD) { | |||
647 | // Make sure that this type is translated. | |||
648 | Types.UpdateCompletedType(TD); | |||
649 | } | |||
650 | ||||
651 | void CodeGenModule::RefreshTypeCacheForClass(const CXXRecordDecl *RD) { | |||
652 | // Make sure that this type is translated. | |||
653 | Types.RefreshTypeCacheForClass(RD); | |||
654 | } | |||
655 | ||||
656 | llvm::MDNode *CodeGenModule::getTBAATypeInfo(QualType QTy) { | |||
657 | if (!TBAA) | |||
658 | return nullptr; | |||
659 | return TBAA->getTypeInfo(QTy); | |||
660 | } | |||
661 | ||||
662 | TBAAAccessInfo CodeGenModule::getTBAAAccessInfo(QualType AccessType) { | |||
663 | if (!TBAA) | |||
664 | return TBAAAccessInfo(); | |||
665 | return TBAA->getAccessInfo(AccessType); | |||
666 | } | |||
667 | ||||
668 | TBAAAccessInfo | |||
669 | CodeGenModule::getTBAAVTablePtrAccessInfo(llvm::Type *VTablePtrType) { | |||
670 | if (!TBAA) | |||
671 | return TBAAAccessInfo(); | |||
672 | return TBAA->getVTablePtrAccessInfo(VTablePtrType); | |||
673 | } | |||
674 | ||||
675 | llvm::MDNode *CodeGenModule::getTBAAStructInfo(QualType QTy) { | |||
676 | if (!TBAA) | |||
677 | return nullptr; | |||
678 | return TBAA->getTBAAStructInfo(QTy); | |||
679 | } | |||
680 | ||||
681 | llvm::MDNode *CodeGenModule::getTBAABaseTypeInfo(QualType QTy) { | |||
682 | if (!TBAA) | |||
683 | return nullptr; | |||
684 | return TBAA->getBaseTypeInfo(QTy); | |||
685 | } | |||
686 | ||||
687 | llvm::MDNode *CodeGenModule::getTBAAAccessTagInfo(TBAAAccessInfo Info) { | |||
688 | if (!TBAA) | |||
689 | return nullptr; | |||
690 | return TBAA->getAccessTagInfo(Info); | |||
691 | } | |||
692 | ||||
693 | TBAAAccessInfo CodeGenModule::mergeTBAAInfoForCast(TBAAAccessInfo SourceInfo, | |||
694 | TBAAAccessInfo TargetInfo) { | |||
695 | if (!TBAA) | |||
696 | return TBAAAccessInfo(); | |||
697 | return TBAA->mergeTBAAInfoForCast(SourceInfo, TargetInfo); | |||
698 | } | |||
699 | ||||
700 | TBAAAccessInfo | |||
701 | CodeGenModule::mergeTBAAInfoForConditionalOperator(TBAAAccessInfo InfoA, | |||
702 | TBAAAccessInfo InfoB) { | |||
703 | if (!TBAA) | |||
704 | return TBAAAccessInfo(); | |||
705 | return TBAA->mergeTBAAInfoForConditionalOperator(InfoA, InfoB); | |||
706 | } | |||
707 | ||||
708 | TBAAAccessInfo | |||
709 | CodeGenModule::mergeTBAAInfoForMemoryTransfer(TBAAAccessInfo DestInfo, | |||
710 | TBAAAccessInfo SrcInfo) { | |||
711 | if (!TBAA) | |||
712 | return TBAAAccessInfo(); | |||
713 | return TBAA->mergeTBAAInfoForConditionalOperator(DestInfo, SrcInfo); | |||
714 | } | |||
715 | ||||
716 | void CodeGenModule::DecorateInstructionWithTBAA(llvm::Instruction *Inst, | |||
717 | TBAAAccessInfo TBAAInfo) { | |||
718 | if (llvm::MDNode *Tag = getTBAAAccessTagInfo(TBAAInfo)) | |||
719 | Inst->setMetadata(llvm::LLVMContext::MD_tbaa, Tag); | |||
720 | } | |||
721 | ||||
722 | void CodeGenModule::DecorateInstructionWithInvariantGroup( | |||
723 | llvm::Instruction *I, const CXXRecordDecl *RD) { | |||
724 | I->setMetadata(llvm::LLVMContext::MD_invariant_group, | |||
725 | llvm::MDNode::get(getLLVMContext(), {})); | |||
726 | } | |||
727 | ||||
728 | void CodeGenModule::Error(SourceLocation loc, StringRef message) { | |||
729 | unsigned diagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, "%0"); | |||
730 | getDiags().Report(Context.getFullLoc(loc), diagID) << message; | |||
731 | } | |||
732 | ||||
733 | /// ErrorUnsupported - Print out an error that codegen doesn't support the | |||
734 | /// specified stmt yet. | |||
735 | void CodeGenModule::ErrorUnsupported(const Stmt *S, const char *Type) { | |||
736 | unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, | |||
737 | "cannot compile this %0 yet"); | |||
738 | std::string Msg = Type; | |||
739 | getDiags().Report(Context.getFullLoc(S->getBeginLoc()), DiagID) | |||
740 | << Msg << S->getSourceRange(); | |||
741 | } | |||
742 | ||||
743 | /// ErrorUnsupported - Print out an error that codegen doesn't support the | |||
744 | /// specified decl yet. | |||
745 | void CodeGenModule::ErrorUnsupported(const Decl *D, const char *Type) { | |||
746 | unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error, | |||
747 | "cannot compile this %0 yet"); | |||
748 | std::string Msg = Type; | |||
749 | getDiags().Report(Context.getFullLoc(D->getLocation()), DiagID) << Msg; | |||
750 | } | |||
751 | ||||
752 | llvm::ConstantInt *CodeGenModule::getSize(CharUnits size) { | |||
753 | return llvm::ConstantInt::get(SizeTy, size.getQuantity()); | |||
754 | } | |||
755 | ||||
756 | void CodeGenModule::setGlobalVisibility(llvm::GlobalValue *GV, | |||
757 | const NamedDecl *D) const { | |||
758 | if (GV->hasDLLImportStorageClass()) | |||
759 | return; | |||
760 | // Internal definitions always have default visibility. | |||
761 | if (GV->hasLocalLinkage()) { | |||
762 | GV->setVisibility(llvm::GlobalValue::DefaultVisibility); | |||
763 | return; | |||
764 | } | |||
765 | if (!D) | |||
766 | return; | |||
767 | // Set visibility for definitions, and for declarations if requested globally | |||
768 | // or set explicitly. | |||
769 | LinkageInfo LV = D->getLinkageAndVisibility(); | |||
770 | if (LV.isVisibilityExplicit() || getLangOpts().SetVisibilityForExternDecls || | |||
771 | !GV->isDeclarationForLinker()) | |||
772 | GV->setVisibility(GetLLVMVisibility(LV.getVisibility())); | |||
773 | } | |||
774 | ||||
775 | static bool shouldAssumeDSOLocal(const CodeGenModule &CGM, | |||
776 | llvm::GlobalValue *GV) { | |||
777 | if (GV->hasLocalLinkage()) | |||
778 | return true; | |||
779 | ||||
780 | if (!GV->hasDefaultVisibility() && !GV->hasExternalWeakLinkage()) | |||
781 | return true; | |||
782 | ||||
783 | // DLLImport explicitly marks the GV as external. | |||
784 | if (GV->hasDLLImportStorageClass()) | |||
785 | return false; | |||
786 | ||||
787 | const llvm::Triple &TT = CGM.getTriple(); | |||
788 | if (TT.isWindowsGNUEnvironment()) { | |||
789 | // In MinGW, variables without DLLImport can still be automatically | |||
790 | // imported from a DLL by the linker; don't mark variables that | |||
791 | // potentially could come from another DLL as DSO local. | |||
792 | if (GV->isDeclarationForLinker() && isa<llvm::GlobalVariable>(GV) && | |||
793 | !GV->isThreadLocal()) | |||
794 | return false; | |||
795 | } | |||
796 | ||||
797 | // On COFF, don't mark 'extern_weak' symbols as DSO local. If these symbols | |||
798 | // remain unresolved in the link, they can be resolved to zero, which is | |||
799 | // outside the current DSO. | |||
800 | if (TT.isOSBinFormatCOFF() && GV->hasExternalWeakLinkage()) | |||
801 | return false; | |||
802 | ||||
803 | // Every other GV is local on COFF. | |||
804 | // Make an exception for windows OS in the triple: Some firmware builds use | |||
805 | // *-win32-macho triples. This (accidentally?) produced windows relocations | |||
806 | // without GOT tables in older clang versions; Keep this behaviour. | |||
807 | // FIXME: even thread local variables? | |||
808 | if (TT.isOSBinFormatCOFF() || (TT.isOSWindows() && TT.isOSBinFormatMachO())) | |||
809 | return true; | |||
810 | ||||
811 | // Only handle COFF and ELF for now. | |||
812 | if (!TT.isOSBinFormatELF()) | |||
813 | return false; | |||
814 | ||||
815 | // If this is not an executable, don't assume anything is local. | |||
816 | const auto &CGOpts = CGM.getCodeGenOpts(); | |||
817 | llvm::Reloc::Model RM = CGOpts.RelocationModel; | |||
818 | const auto &LOpts = CGM.getLangOpts(); | |||
819 | if (RM != llvm::Reloc::Static && !LOpts.PIE && !LOpts.OpenMPIsDevice) | |||
820 | return false; | |||
821 | ||||
822 | // A definition cannot be preempted from an executable. | |||
823 | if (!GV->isDeclarationForLinker()) | |||
824 | return true; | |||
825 | ||||
826 | // Most PIC code sequences that assume that a symbol is local cannot produce a | |||
827 | // 0 if it turns out the symbol is undefined. While this is ABI and relocation | |||
828 | // depended, it seems worth it to handle it here. | |||
829 | if (RM == llvm::Reloc::PIC_ && GV->hasExternalWeakLinkage()) | |||
830 | return false; | |||
831 | ||||
832 | // PPC has no copy relocations and cannot use a plt entry as a symbol address. | |||
833 | llvm::Triple::ArchType Arch = TT.getArch(); | |||
834 | if (Arch == llvm::Triple::ppc || Arch == llvm::Triple::ppc64 || | |||
835 | Arch == llvm::Triple::ppc64le) | |||
836 | return false; | |||
837 | ||||
838 | // If we can use copy relocations we can assume it is local. | |||
839 | if (auto *Var = dyn_cast<llvm::GlobalVariable>(GV)) | |||
840 | if (!Var->isThreadLocal() && | |||
841 | (RM == llvm::Reloc::Static || CGOpts.PIECopyRelocations)) | |||
842 | return true; | |||
843 | ||||
844 | // If we can use a plt entry as the symbol address we can assume it | |||
845 | // is local. | |||
846 | // FIXME: This should work for PIE, but the gold linker doesn't support it. | |||
847 | if (isa<llvm::Function>(GV) && !CGOpts.NoPLT && RM == llvm::Reloc::Static) | |||
848 | return true; | |||
849 | ||||
850 | // Otherwise don't assue it is local. | |||
851 | return false; | |||
852 | } | |||
853 | ||||
854 | void CodeGenModule::setDSOLocal(llvm::GlobalValue *GV) const { | |||
855 | GV->setDSOLocal(shouldAssumeDSOLocal(*this, GV)); | |||
856 | } | |||
857 | ||||
858 | void CodeGenModule::setDLLImportDLLExport(llvm::GlobalValue *GV, | |||
859 | GlobalDecl GD) const { | |||
860 | const auto *D = dyn_cast<NamedDecl>(GD.getDecl()); | |||
861 | // C++ destructors have a few C++ ABI specific special cases. | |||
862 | if (const auto *Dtor = dyn_cast_or_null<CXXDestructorDecl>(D)) { | |||
863 | getCXXABI().setCXXDestructorDLLStorage(GV, Dtor, GD.getDtorType()); | |||
864 | return; | |||
865 | } | |||
866 | setDLLImportDLLExport(GV, D); | |||
867 | } | |||
868 | ||||
869 | void CodeGenModule::setDLLImportDLLExport(llvm::GlobalValue *GV, | |||
870 | const NamedDecl *D) const { | |||
871 | if (D && D->isExternallyVisible()) { | |||
872 | if (D->hasAttr<DLLImportAttr>()) | |||
873 | GV->setDLLStorageClass(llvm::GlobalVariable::DLLImportStorageClass); | |||
874 | else if (D->hasAttr<DLLExportAttr>() && !GV->isDeclarationForLinker()) | |||
875 | GV->setDLLStorageClass(llvm::GlobalVariable::DLLExportStorageClass); | |||
876 | } | |||
877 | } | |||
878 | ||||
879 | void CodeGenModule::setGVProperties(llvm::GlobalValue *GV, | |||
880 | GlobalDecl GD) const { | |||
881 | setDLLImportDLLExport(GV, GD); | |||
882 | setGVPropertiesAux(GV, dyn_cast<NamedDecl>(GD.getDecl())); | |||
883 | } | |||
884 | ||||
885 | void CodeGenModule::setGVProperties(llvm::GlobalValue *GV, | |||
886 | const NamedDecl *D) const { | |||
887 | setDLLImportDLLExport(GV, D); | |||
888 | setGVPropertiesAux(GV, D); | |||
889 | } | |||
890 | ||||
891 | void CodeGenModule::setGVPropertiesAux(llvm::GlobalValue *GV, | |||
892 | const NamedDecl *D) const { | |||
893 | setGlobalVisibility(GV, D); | |||
894 | setDSOLocal(GV); | |||
895 | GV->setPartition(CodeGenOpts.SymbolPartition); | |||
896 | } | |||
897 | ||||
898 | static llvm::GlobalVariable::ThreadLocalMode GetLLVMTLSModel(StringRef S) { | |||
899 | return llvm::StringSwitch<llvm::GlobalVariable::ThreadLocalMode>(S) | |||
900 | .Case("global-dynamic", llvm::GlobalVariable::GeneralDynamicTLSModel) | |||
901 | .Case("local-dynamic", llvm::GlobalVariable::LocalDynamicTLSModel) | |||
902 | .Case("initial-exec", llvm::GlobalVariable::InitialExecTLSModel) | |||
903 | .Case("local-exec", llvm::GlobalVariable::LocalExecTLSModel); | |||
904 | } | |||
905 | ||||
906 | static llvm::GlobalVariable::ThreadLocalMode GetLLVMTLSModel( | |||
907 | CodeGenOptions::TLSModel M) { | |||
908 | switch (M) { | |||
909 | case CodeGenOptions::GeneralDynamicTLSModel: | |||
910 | return llvm::GlobalVariable::GeneralDynamicTLSModel; | |||
911 | case CodeGenOptions::LocalDynamicTLSModel: | |||
912 | return llvm::GlobalVariable::LocalDynamicTLSModel; | |||
913 | case CodeGenOptions::InitialExecTLSModel: | |||
914 | return llvm::GlobalVariable::InitialExecTLSModel; | |||
915 | case CodeGenOptions::LocalExecTLSModel: | |||
916 | return llvm::GlobalVariable::LocalExecTLSModel; | |||
917 | } | |||
918 | llvm_unreachable("Invalid TLS model!")::llvm::llvm_unreachable_internal("Invalid TLS model!", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 918); | |||
919 | } | |||
920 | ||||
921 | void CodeGenModule::setTLSMode(llvm::GlobalValue *GV, const VarDecl &D) const { | |||
922 | assert(D.getTLSKind() && "setting TLS mode on non-TLS var!")((D.getTLSKind() && "setting TLS mode on non-TLS var!" ) ? static_cast<void> (0) : __assert_fail ("D.getTLSKind() && \"setting TLS mode on non-TLS var!\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 922, __PRETTY_FUNCTION__)); | |||
923 | ||||
924 | llvm::GlobalValue::ThreadLocalMode TLM; | |||
925 | TLM = GetLLVMTLSModel(CodeGenOpts.getDefaultTLSModel()); | |||
926 | ||||
927 | // Override the TLS model if it is explicitly specified. | |||
928 | if (const TLSModelAttr *Attr = D.getAttr<TLSModelAttr>()) { | |||
929 | TLM = GetLLVMTLSModel(Attr->getModel()); | |||
930 | } | |||
931 | ||||
932 | GV->setThreadLocalMode(TLM); | |||
933 | } | |||
934 | ||||
935 | static std::string getCPUSpecificMangling(const CodeGenModule &CGM, | |||
936 | StringRef Name) { | |||
937 | const TargetInfo &Target = CGM.getTarget(); | |||
938 | return (Twine('.') + Twine(Target.CPUSpecificManglingCharacter(Name))).str(); | |||
939 | } | |||
940 | ||||
941 | static void AppendCPUSpecificCPUDispatchMangling(const CodeGenModule &CGM, | |||
942 | const CPUSpecificAttr *Attr, | |||
943 | unsigned CPUIndex, | |||
944 | raw_ostream &Out) { | |||
945 | // cpu_specific gets the current name, dispatch gets the resolver if IFunc is | |||
946 | // supported. | |||
947 | if (Attr) | |||
948 | Out << getCPUSpecificMangling(CGM, Attr->getCPUName(CPUIndex)->getName()); | |||
949 | else if (CGM.getTarget().supportsIFunc()) | |||
950 | Out << ".resolver"; | |||
951 | } | |||
952 | ||||
953 | static void AppendTargetMangling(const CodeGenModule &CGM, | |||
954 | const TargetAttr *Attr, raw_ostream &Out) { | |||
955 | if (Attr->isDefaultVersion()) | |||
956 | return; | |||
957 | ||||
958 | Out << '.'; | |||
959 | const TargetInfo &Target = CGM.getTarget(); | |||
960 | TargetAttr::ParsedTargetAttr Info = | |||
961 | Attr->parse([&Target](StringRef LHS, StringRef RHS) { | |||
962 | // Multiversioning doesn't allow "no-${feature}", so we can | |||
963 | // only have "+" prefixes here. | |||
964 | assert(LHS.startswith("+") && RHS.startswith("+") &&((LHS.startswith("+") && RHS.startswith("+") && "Features should always have a prefix.") ? static_cast<void > (0) : __assert_fail ("LHS.startswith(\"+\") && RHS.startswith(\"+\") && \"Features should always have a prefix.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 965, __PRETTY_FUNCTION__)) | |||
965 | "Features should always have a prefix.")((LHS.startswith("+") && RHS.startswith("+") && "Features should always have a prefix.") ? static_cast<void > (0) : __assert_fail ("LHS.startswith(\"+\") && RHS.startswith(\"+\") && \"Features should always have a prefix.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 965, __PRETTY_FUNCTION__)); | |||
966 | return Target.multiVersionSortPriority(LHS.substr(1)) > | |||
967 | Target.multiVersionSortPriority(RHS.substr(1)); | |||
968 | }); | |||
969 | ||||
970 | bool IsFirst = true; | |||
971 | ||||
972 | if (!Info.Architecture.empty()) { | |||
973 | IsFirst = false; | |||
974 | Out << "arch_" << Info.Architecture; | |||
975 | } | |||
976 | ||||
977 | for (StringRef Feat : Info.Features) { | |||
978 | if (!IsFirst) | |||
979 | Out << '_'; | |||
980 | IsFirst = false; | |||
981 | Out << Feat.substr(1); | |||
982 | } | |||
983 | } | |||
984 | ||||
985 | static std::string getMangledNameImpl(const CodeGenModule &CGM, GlobalDecl GD, | |||
986 | const NamedDecl *ND, | |||
987 | bool OmitMultiVersionMangling = false) { | |||
988 | SmallString<256> Buffer; | |||
989 | llvm::raw_svector_ostream Out(Buffer); | |||
990 | MangleContext &MC = CGM.getCXXABI().getMangleContext(); | |||
991 | if (MC.shouldMangleDeclName(ND)) { | |||
992 | llvm::raw_svector_ostream Out(Buffer); | |||
993 | if (const auto *D = dyn_cast<CXXConstructorDecl>(ND)) | |||
994 | MC.mangleCXXCtor(D, GD.getCtorType(), Out); | |||
995 | else if (const auto *D = dyn_cast<CXXDestructorDecl>(ND)) | |||
996 | MC.mangleCXXDtor(D, GD.getDtorType(), Out); | |||
997 | else | |||
998 | MC.mangleName(ND, Out); | |||
999 | } else { | |||
1000 | IdentifierInfo *II = ND->getIdentifier(); | |||
1001 | assert(II && "Attempt to mangle unnamed decl.")((II && "Attempt to mangle unnamed decl.") ? static_cast <void> (0) : __assert_fail ("II && \"Attempt to mangle unnamed decl.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1001, __PRETTY_FUNCTION__)); | |||
1002 | const auto *FD = dyn_cast<FunctionDecl>(ND); | |||
1003 | ||||
1004 | if (FD && | |||
1005 | FD->getType()->castAs<FunctionType>()->getCallConv() == CC_X86RegCall) { | |||
1006 | llvm::raw_svector_ostream Out(Buffer); | |||
1007 | Out << "__regcall3__" << II->getName(); | |||
1008 | } else { | |||
1009 | Out << II->getName(); | |||
1010 | } | |||
1011 | } | |||
1012 | ||||
1013 | if (const auto *FD = dyn_cast<FunctionDecl>(ND)) | |||
1014 | if (FD->isMultiVersion() && !OmitMultiVersionMangling) { | |||
1015 | switch (FD->getMultiVersionKind()) { | |||
1016 | case MultiVersionKind::CPUDispatch: | |||
1017 | case MultiVersionKind::CPUSpecific: | |||
1018 | AppendCPUSpecificCPUDispatchMangling(CGM, | |||
1019 | FD->getAttr<CPUSpecificAttr>(), | |||
1020 | GD.getMultiVersionIndex(), Out); | |||
1021 | break; | |||
1022 | case MultiVersionKind::Target: | |||
1023 | AppendTargetMangling(CGM, FD->getAttr<TargetAttr>(), Out); | |||
1024 | break; | |||
1025 | case MultiVersionKind::None: | |||
1026 | llvm_unreachable("None multiversion type isn't valid here")::llvm::llvm_unreachable_internal("None multiversion type isn't valid here" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1026); | |||
1027 | } | |||
1028 | } | |||
1029 | ||||
1030 | return Out.str(); | |||
1031 | } | |||
1032 | ||||
1033 | void CodeGenModule::UpdateMultiVersionNames(GlobalDecl GD, | |||
1034 | const FunctionDecl *FD) { | |||
1035 | if (!FD->isMultiVersion()) | |||
1036 | return; | |||
1037 | ||||
1038 | // Get the name of what this would be without the 'target' attribute. This | |||
1039 | // allows us to lookup the version that was emitted when this wasn't a | |||
1040 | // multiversion function. | |||
1041 | std::string NonTargetName = | |||
1042 | getMangledNameImpl(*this, GD, FD, /*OmitMultiVersionMangling=*/true); | |||
1043 | GlobalDecl OtherGD; | |||
1044 | if (lookupRepresentativeDecl(NonTargetName, OtherGD)) { | |||
1045 | assert(OtherGD.getCanonicalDecl()((OtherGD.getCanonicalDecl() .getDecl() ->getAsFunction() -> isMultiVersion() && "Other GD should now be a multiversioned function" ) ? static_cast<void> (0) : __assert_fail ("OtherGD.getCanonicalDecl() .getDecl() ->getAsFunction() ->isMultiVersion() && \"Other GD should now be a multiversioned function\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1049, __PRETTY_FUNCTION__)) | |||
1046 | .getDecl()((OtherGD.getCanonicalDecl() .getDecl() ->getAsFunction() -> isMultiVersion() && "Other GD should now be a multiversioned function" ) ? static_cast<void> (0) : __assert_fail ("OtherGD.getCanonicalDecl() .getDecl() ->getAsFunction() ->isMultiVersion() && \"Other GD should now be a multiversioned function\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1049, __PRETTY_FUNCTION__)) | |||
1047 | ->getAsFunction()((OtherGD.getCanonicalDecl() .getDecl() ->getAsFunction() -> isMultiVersion() && "Other GD should now be a multiversioned function" ) ? static_cast<void> (0) : __assert_fail ("OtherGD.getCanonicalDecl() .getDecl() ->getAsFunction() ->isMultiVersion() && \"Other GD should now be a multiversioned function\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1049, __PRETTY_FUNCTION__)) | |||
1048 | ->isMultiVersion() &&((OtherGD.getCanonicalDecl() .getDecl() ->getAsFunction() -> isMultiVersion() && "Other GD should now be a multiversioned function" ) ? static_cast<void> (0) : __assert_fail ("OtherGD.getCanonicalDecl() .getDecl() ->getAsFunction() ->isMultiVersion() && \"Other GD should now be a multiversioned function\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1049, __PRETTY_FUNCTION__)) | |||
1049 | "Other GD should now be a multiversioned function")((OtherGD.getCanonicalDecl() .getDecl() ->getAsFunction() -> isMultiVersion() && "Other GD should now be a multiversioned function" ) ? static_cast<void> (0) : __assert_fail ("OtherGD.getCanonicalDecl() .getDecl() ->getAsFunction() ->isMultiVersion() && \"Other GD should now be a multiversioned function\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1049, __PRETTY_FUNCTION__)); | |||
1050 | // OtherFD is the version of this function that was mangled BEFORE | |||
1051 | // becoming a MultiVersion function. It potentially needs to be updated. | |||
1052 | const FunctionDecl *OtherFD = OtherGD.getCanonicalDecl() | |||
1053 | .getDecl() | |||
1054 | ->getAsFunction() | |||
1055 | ->getMostRecentDecl(); | |||
1056 | std::string OtherName = getMangledNameImpl(*this, OtherGD, OtherFD); | |||
1057 | // This is so that if the initial version was already the 'default' | |||
1058 | // version, we don't try to update it. | |||
1059 | if (OtherName != NonTargetName) { | |||
1060 | // Remove instead of erase, since others may have stored the StringRef | |||
1061 | // to this. | |||
1062 | const auto ExistingRecord = Manglings.find(NonTargetName); | |||
1063 | if (ExistingRecord != std::end(Manglings)) | |||
1064 | Manglings.remove(&(*ExistingRecord)); | |||
1065 | auto Result = Manglings.insert(std::make_pair(OtherName, OtherGD)); | |||
1066 | MangledDeclNames[OtherGD.getCanonicalDecl()] = Result.first->first(); | |||
1067 | if (llvm::GlobalValue *Entry = GetGlobalValue(NonTargetName)) | |||
1068 | Entry->setName(OtherName); | |||
1069 | } | |||
1070 | } | |||
1071 | } | |||
1072 | ||||
1073 | StringRef CodeGenModule::getMangledName(GlobalDecl GD) { | |||
1074 | GlobalDecl CanonicalGD = GD.getCanonicalDecl(); | |||
1075 | ||||
1076 | // Some ABIs don't have constructor variants. Make sure that base and | |||
1077 | // complete constructors get mangled the same. | |||
1078 | if (const auto *CD = dyn_cast<CXXConstructorDecl>(CanonicalGD.getDecl())) { | |||
1079 | if (!getTarget().getCXXABI().hasConstructorVariants()) { | |||
1080 | CXXCtorType OrigCtorType = GD.getCtorType(); | |||
1081 | assert(OrigCtorType == Ctor_Base || OrigCtorType == Ctor_Complete)((OrigCtorType == Ctor_Base || OrigCtorType == Ctor_Complete) ? static_cast<void> (0) : __assert_fail ("OrigCtorType == Ctor_Base || OrigCtorType == Ctor_Complete" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1081, __PRETTY_FUNCTION__)); | |||
1082 | if (OrigCtorType == Ctor_Base) | |||
1083 | CanonicalGD = GlobalDecl(CD, Ctor_Complete); | |||
1084 | } | |||
1085 | } | |||
1086 | ||||
1087 | auto FoundName = MangledDeclNames.find(CanonicalGD); | |||
1088 | if (FoundName != MangledDeclNames.end()) | |||
1089 | return FoundName->second; | |||
1090 | ||||
1091 | // Keep the first result in the case of a mangling collision. | |||
1092 | const auto *ND = cast<NamedDecl>(GD.getDecl()); | |||
1093 | std::string MangledName = getMangledNameImpl(*this, GD, ND); | |||
1094 | ||||
1095 | // Adjust kernel stub mangling as we may need to be able to differentiate | |||
1096 | // them from the kernel itself (e.g., for HIP). | |||
1097 | if (auto *FD = dyn_cast<FunctionDecl>(GD.getDecl())) | |||
1098 | if (!getLangOpts().CUDAIsDevice && FD->hasAttr<CUDAGlobalAttr>()) | |||
1099 | MangledName = getCUDARuntime().getDeviceStubName(MangledName); | |||
1100 | ||||
1101 | auto Result = Manglings.insert(std::make_pair(MangledName, GD)); | |||
1102 | return MangledDeclNames[CanonicalGD] = Result.first->first(); | |||
1103 | } | |||
1104 | ||||
1105 | StringRef CodeGenModule::getBlockMangledName(GlobalDecl GD, | |||
1106 | const BlockDecl *BD) { | |||
1107 | MangleContext &MangleCtx = getCXXABI().getMangleContext(); | |||
1108 | const Decl *D = GD.getDecl(); | |||
1109 | ||||
1110 | SmallString<256> Buffer; | |||
1111 | llvm::raw_svector_ostream Out(Buffer); | |||
1112 | if (!D) | |||
1113 | MangleCtx.mangleGlobalBlock(BD, | |||
1114 | dyn_cast_or_null<VarDecl>(initializedGlobalDecl.getDecl()), Out); | |||
1115 | else if (const auto *CD = dyn_cast<CXXConstructorDecl>(D)) | |||
1116 | MangleCtx.mangleCtorBlock(CD, GD.getCtorType(), BD, Out); | |||
1117 | else if (const auto *DD = dyn_cast<CXXDestructorDecl>(D)) | |||
1118 | MangleCtx.mangleDtorBlock(DD, GD.getDtorType(), BD, Out); | |||
1119 | else | |||
1120 | MangleCtx.mangleBlock(cast<DeclContext>(D), BD, Out); | |||
1121 | ||||
1122 | auto Result = Manglings.insert(std::make_pair(Out.str(), BD)); | |||
1123 | return Result.first->first(); | |||
1124 | } | |||
1125 | ||||
1126 | llvm::GlobalValue *CodeGenModule::GetGlobalValue(StringRef Name) { | |||
1127 | return getModule().getNamedValue(Name); | |||
1128 | } | |||
1129 | ||||
1130 | /// AddGlobalCtor - Add a function to the list that will be called before | |||
1131 | /// main() runs. | |||
1132 | void CodeGenModule::AddGlobalCtor(llvm::Function *Ctor, int Priority, | |||
1133 | llvm::Constant *AssociatedData) { | |||
1134 | // FIXME: Type coercion of void()* types. | |||
1135 | GlobalCtors.push_back(Structor(Priority, Ctor, AssociatedData)); | |||
1136 | } | |||
1137 | ||||
1138 | /// AddGlobalDtor - Add a function to the list that will be called | |||
1139 | /// when the module is unloaded. | |||
1140 | void CodeGenModule::AddGlobalDtor(llvm::Function *Dtor, int Priority) { | |||
1141 | if (CodeGenOpts.RegisterGlobalDtorsWithAtExit) { | |||
1142 | DtorsUsingAtExit[Priority].push_back(Dtor); | |||
1143 | return; | |||
1144 | } | |||
1145 | ||||
1146 | // FIXME: Type coercion of void()* types. | |||
1147 | GlobalDtors.push_back(Structor(Priority, Dtor, nullptr)); | |||
1148 | } | |||
1149 | ||||
1150 | void CodeGenModule::EmitCtorList(CtorList &Fns, const char *GlobalName) { | |||
1151 | if (Fns.empty()) return; | |||
1152 | ||||
1153 | // Ctor function type is void()*. | |||
1154 | llvm::FunctionType* CtorFTy = llvm::FunctionType::get(VoidTy, false); | |||
1155 | llvm::Type *CtorPFTy = llvm::PointerType::get(CtorFTy, | |||
1156 | TheModule.getDataLayout().getProgramAddressSpace()); | |||
1157 | ||||
1158 | // Get the type of a ctor entry, { i32, void ()*, i8* }. | |||
1159 | llvm::StructType *CtorStructTy = llvm::StructType::get( | |||
1160 | Int32Ty, CtorPFTy, VoidPtrTy); | |||
1161 | ||||
1162 | // Construct the constructor and destructor arrays. | |||
1163 | ConstantInitBuilder builder(*this); | |||
1164 | auto ctors = builder.beginArray(CtorStructTy); | |||
1165 | for (const auto &I : Fns) { | |||
1166 | auto ctor = ctors.beginStruct(CtorStructTy); | |||
1167 | ctor.addInt(Int32Ty, I.Priority); | |||
1168 | ctor.add(llvm::ConstantExpr::getBitCast(I.Initializer, CtorPFTy)); | |||
1169 | if (I.AssociatedData) | |||
1170 | ctor.add(llvm::ConstantExpr::getBitCast(I.AssociatedData, VoidPtrTy)); | |||
1171 | else | |||
1172 | ctor.addNullPointer(VoidPtrTy); | |||
1173 | ctor.finishAndAddTo(ctors); | |||
1174 | } | |||
1175 | ||||
1176 | auto list = | |||
1177 | ctors.finishAndCreateGlobal(GlobalName, getPointerAlign(), | |||
1178 | /*constant*/ false, | |||
1179 | llvm::GlobalValue::AppendingLinkage); | |||
1180 | ||||
1181 | // The LTO linker doesn't seem to like it when we set an alignment | |||
1182 | // on appending variables. Take it off as a workaround. | |||
1183 | list->setAlignment(llvm::None); | |||
1184 | ||||
1185 | Fns.clear(); | |||
1186 | } | |||
1187 | ||||
1188 | llvm::GlobalValue::LinkageTypes | |||
1189 | CodeGenModule::getFunctionLinkage(GlobalDecl GD) { | |||
1190 | const auto *D = cast<FunctionDecl>(GD.getDecl()); | |||
1191 | ||||
1192 | GVALinkage Linkage = getContext().GetGVALinkageForFunction(D); | |||
1193 | ||||
1194 | if (const auto *Dtor = dyn_cast<CXXDestructorDecl>(D)) | |||
1195 | return getCXXABI().getCXXDestructorLinkage(Linkage, Dtor, GD.getDtorType()); | |||
1196 | ||||
1197 | if (isa<CXXConstructorDecl>(D) && | |||
1198 | cast<CXXConstructorDecl>(D)->isInheritingConstructor() && | |||
1199 | Context.getTargetInfo().getCXXABI().isMicrosoft()) { | |||
1200 | // Our approach to inheriting constructors is fundamentally different from | |||
1201 | // that used by the MS ABI, so keep our inheriting constructor thunks | |||
1202 | // internal rather than trying to pick an unambiguous mangling for them. | |||
1203 | return llvm::GlobalValue::InternalLinkage; | |||
1204 | } | |||
1205 | ||||
1206 | return getLLVMLinkageForDeclarator(D, Linkage, /*IsConstantVariable=*/false); | |||
1207 | } | |||
1208 | ||||
1209 | llvm::ConstantInt *CodeGenModule::CreateCrossDsoCfiTypeId(llvm::Metadata *MD) { | |||
1210 | llvm::MDString *MDS = dyn_cast<llvm::MDString>(MD); | |||
1211 | if (!MDS) return nullptr; | |||
1212 | ||||
1213 | return llvm::ConstantInt::get(Int64Ty, llvm::MD5Hash(MDS->getString())); | |||
1214 | } | |||
1215 | ||||
1216 | void CodeGenModule::SetLLVMFunctionAttributes(GlobalDecl GD, | |||
1217 | const CGFunctionInfo &Info, | |||
1218 | llvm::Function *F) { | |||
1219 | unsigned CallingConv; | |||
1220 | llvm::AttributeList PAL; | |||
1221 | ConstructAttributeList(F->getName(), Info, GD, PAL, CallingConv, false); | |||
1222 | F->setAttributes(PAL); | |||
1223 | F->setCallingConv(static_cast<llvm::CallingConv::ID>(CallingConv)); | |||
1224 | } | |||
1225 | ||||
1226 | static void removeImageAccessQualifier(std::string& TyName) { | |||
1227 | std::string ReadOnlyQual("__read_only"); | |||
1228 | std::string::size_type ReadOnlyPos = TyName.find(ReadOnlyQual); | |||
1229 | if (ReadOnlyPos != std::string::npos) | |||
1230 | // "+ 1" for the space after access qualifier. | |||
1231 | TyName.erase(ReadOnlyPos, ReadOnlyQual.size() + 1); | |||
1232 | else { | |||
1233 | std::string WriteOnlyQual("__write_only"); | |||
1234 | std::string::size_type WriteOnlyPos = TyName.find(WriteOnlyQual); | |||
1235 | if (WriteOnlyPos != std::string::npos) | |||
1236 | TyName.erase(WriteOnlyPos, WriteOnlyQual.size() + 1); | |||
1237 | else { | |||
1238 | std::string ReadWriteQual("__read_write"); | |||
1239 | std::string::size_type ReadWritePos = TyName.find(ReadWriteQual); | |||
1240 | if (ReadWritePos != std::string::npos) | |||
1241 | TyName.erase(ReadWritePos, ReadWriteQual.size() + 1); | |||
1242 | } | |||
1243 | } | |||
1244 | } | |||
1245 | ||||
1246 | // Returns the address space id that should be produced to the | |||
1247 | // kernel_arg_addr_space metadata. This is always fixed to the ids | |||
1248 | // as specified in the SPIR 2.0 specification in order to differentiate | |||
1249 | // for example in clGetKernelArgInfo() implementation between the address | |||
1250 | // spaces with targets without unique mapping to the OpenCL address spaces | |||
1251 | // (basically all single AS CPUs). | |||
1252 | static unsigned ArgInfoAddressSpace(LangAS AS) { | |||
1253 | switch (AS) { | |||
1254 | case LangAS::opencl_global: return 1; | |||
1255 | case LangAS::opencl_constant: return 2; | |||
1256 | case LangAS::opencl_local: return 3; | |||
1257 | case LangAS::opencl_generic: return 4; // Not in SPIR 2.0 specs. | |||
1258 | default: | |||
1259 | return 0; // Assume private. | |||
1260 | } | |||
1261 | } | |||
1262 | ||||
1263 | void CodeGenModule::GenOpenCLArgMetadata(llvm::Function *Fn, | |||
1264 | const FunctionDecl *FD, | |||
1265 | CodeGenFunction *CGF) { | |||
1266 | assert(((FD && CGF) || (!FD && !CGF)) &&((((FD && CGF) || (!FD && !CGF)) && "Incorrect use - FD and CGF should either be both null or not!" ) ? static_cast<void> (0) : __assert_fail ("((FD && CGF) || (!FD && !CGF)) && \"Incorrect use - FD and CGF should either be both null or not!\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1267, __PRETTY_FUNCTION__)) | |||
1267 | "Incorrect use - FD and CGF should either be both null or not!")((((FD && CGF) || (!FD && !CGF)) && "Incorrect use - FD and CGF should either be both null or not!" ) ? static_cast<void> (0) : __assert_fail ("((FD && CGF) || (!FD && !CGF)) && \"Incorrect use - FD and CGF should either be both null or not!\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1267, __PRETTY_FUNCTION__)); | |||
1268 | // Create MDNodes that represent the kernel arg metadata. | |||
1269 | // Each MDNode is a list in the form of "key", N number of values which is | |||
1270 | // the same number of values as their are kernel arguments. | |||
1271 | ||||
1272 | const PrintingPolicy &Policy = Context.getPrintingPolicy(); | |||
1273 | ||||
1274 | // MDNode for the kernel argument address space qualifiers. | |||
1275 | SmallVector<llvm::Metadata *, 8> addressQuals; | |||
1276 | ||||
1277 | // MDNode for the kernel argument access qualifiers (images only). | |||
1278 | SmallVector<llvm::Metadata *, 8> accessQuals; | |||
1279 | ||||
1280 | // MDNode for the kernel argument type names. | |||
1281 | SmallVector<llvm::Metadata *, 8> argTypeNames; | |||
1282 | ||||
1283 | // MDNode for the kernel argument base type names. | |||
1284 | SmallVector<llvm::Metadata *, 8> argBaseTypeNames; | |||
1285 | ||||
1286 | // MDNode for the kernel argument type qualifiers. | |||
1287 | SmallVector<llvm::Metadata *, 8> argTypeQuals; | |||
1288 | ||||
1289 | // MDNode for the kernel argument names. | |||
1290 | SmallVector<llvm::Metadata *, 8> argNames; | |||
1291 | ||||
1292 | if (FD && CGF) | |||
1293 | for (unsigned i = 0, e = FD->getNumParams(); i != e; ++i) { | |||
1294 | const ParmVarDecl *parm = FD->getParamDecl(i); | |||
1295 | QualType ty = parm->getType(); | |||
1296 | std::string typeQuals; | |||
1297 | ||||
1298 | if (ty->isPointerType()) { | |||
1299 | QualType pointeeTy = ty->getPointeeType(); | |||
1300 | ||||
1301 | // Get address qualifier. | |||
1302 | addressQuals.push_back( | |||
1303 | llvm::ConstantAsMetadata::get(CGF->Builder.getInt32( | |||
1304 | ArgInfoAddressSpace(pointeeTy.getAddressSpace())))); | |||
1305 | ||||
1306 | // Get argument type name. | |||
1307 | std::string typeName = | |||
1308 | pointeeTy.getUnqualifiedType().getAsString(Policy) + "*"; | |||
1309 | ||||
1310 | // Turn "unsigned type" to "utype" | |||
1311 | std::string::size_type pos = typeName.find("unsigned"); | |||
1312 | if (pointeeTy.isCanonical() && pos != std::string::npos) | |||
1313 | typeName.erase(pos + 1, 8); | |||
1314 | ||||
1315 | argTypeNames.push_back(llvm::MDString::get(VMContext, typeName)); | |||
1316 | ||||
1317 | std::string baseTypeName = | |||
1318 | pointeeTy.getUnqualifiedType().getCanonicalType().getAsString( | |||
1319 | Policy) + | |||
1320 | "*"; | |||
1321 | ||||
1322 | // Turn "unsigned type" to "utype" | |||
1323 | pos = baseTypeName.find("unsigned"); | |||
1324 | if (pos != std::string::npos) | |||
1325 | baseTypeName.erase(pos + 1, 8); | |||
1326 | ||||
1327 | argBaseTypeNames.push_back( | |||
1328 | llvm::MDString::get(VMContext, baseTypeName)); | |||
1329 | ||||
1330 | // Get argument type qualifiers: | |||
1331 | if (ty.isRestrictQualified()) | |||
1332 | typeQuals = "restrict"; | |||
1333 | if (pointeeTy.isConstQualified() || | |||
1334 | (pointeeTy.getAddressSpace() == LangAS::opencl_constant)) | |||
1335 | typeQuals += typeQuals.empty() ? "const" : " const"; | |||
1336 | if (pointeeTy.isVolatileQualified()) | |||
1337 | typeQuals += typeQuals.empty() ? "volatile" : " volatile"; | |||
1338 | } else { | |||
1339 | uint32_t AddrSpc = 0; | |||
1340 | bool isPipe = ty->isPipeType(); | |||
1341 | if (ty->isImageType() || isPipe) | |||
1342 | AddrSpc = ArgInfoAddressSpace(LangAS::opencl_global); | |||
1343 | ||||
1344 | addressQuals.push_back( | |||
1345 | llvm::ConstantAsMetadata::get(CGF->Builder.getInt32(AddrSpc))); | |||
1346 | ||||
1347 | // Get argument type name. | |||
1348 | std::string typeName; | |||
1349 | if (isPipe) | |||
1350 | typeName = ty.getCanonicalType() | |||
1351 | ->getAs<PipeType>() | |||
1352 | ->getElementType() | |||
1353 | .getAsString(Policy); | |||
1354 | else | |||
1355 | typeName = ty.getUnqualifiedType().getAsString(Policy); | |||
1356 | ||||
1357 | // Turn "unsigned type" to "utype" | |||
1358 | std::string::size_type pos = typeName.find("unsigned"); | |||
1359 | if (ty.isCanonical() && pos != std::string::npos) | |||
1360 | typeName.erase(pos + 1, 8); | |||
1361 | ||||
1362 | std::string baseTypeName; | |||
1363 | if (isPipe) | |||
1364 | baseTypeName = ty.getCanonicalType() | |||
1365 | ->getAs<PipeType>() | |||
1366 | ->getElementType() | |||
1367 | .getCanonicalType() | |||
1368 | .getAsString(Policy); | |||
1369 | else | |||
1370 | baseTypeName = | |||
1371 | ty.getUnqualifiedType().getCanonicalType().getAsString(Policy); | |||
1372 | ||||
1373 | // Remove access qualifiers on images | |||
1374 | // (as they are inseparable from type in clang implementation, | |||
1375 | // but OpenCL spec provides a special query to get access qualifier | |||
1376 | // via clGetKernelArgInfo with CL_KERNEL_ARG_ACCESS_QUALIFIER): | |||
1377 | if (ty->isImageType()) { | |||
1378 | removeImageAccessQualifier(typeName); | |||
1379 | removeImageAccessQualifier(baseTypeName); | |||
1380 | } | |||
1381 | ||||
1382 | argTypeNames.push_back(llvm::MDString::get(VMContext, typeName)); | |||
1383 | ||||
1384 | // Turn "unsigned type" to "utype" | |||
1385 | pos = baseTypeName.find("unsigned"); | |||
1386 | if (pos != std::string::npos) | |||
1387 | baseTypeName.erase(pos + 1, 8); | |||
1388 | ||||
1389 | argBaseTypeNames.push_back( | |||
1390 | llvm::MDString::get(VMContext, baseTypeName)); | |||
1391 | ||||
1392 | if (isPipe) | |||
1393 | typeQuals = "pipe"; | |||
1394 | } | |||
1395 | ||||
1396 | argTypeQuals.push_back(llvm::MDString::get(VMContext, typeQuals)); | |||
1397 | ||||
1398 | // Get image and pipe access qualifier: | |||
1399 | if (ty->isImageType() || ty->isPipeType()) { | |||
1400 | const Decl *PDecl = parm; | |||
1401 | if (auto *TD = dyn_cast<TypedefType>(ty)) | |||
1402 | PDecl = TD->getDecl(); | |||
1403 | const OpenCLAccessAttr *A = PDecl->getAttr<OpenCLAccessAttr>(); | |||
1404 | if (A && A->isWriteOnly()) | |||
1405 | accessQuals.push_back(llvm::MDString::get(VMContext, "write_only")); | |||
1406 | else if (A && A->isReadWrite()) | |||
1407 | accessQuals.push_back(llvm::MDString::get(VMContext, "read_write")); | |||
1408 | else | |||
1409 | accessQuals.push_back(llvm::MDString::get(VMContext, "read_only")); | |||
1410 | } else | |||
1411 | accessQuals.push_back(llvm::MDString::get(VMContext, "none")); | |||
1412 | ||||
1413 | // Get argument name. | |||
1414 | argNames.push_back(llvm::MDString::get(VMContext, parm->getName())); | |||
1415 | } | |||
1416 | ||||
1417 | Fn->setMetadata("kernel_arg_addr_space", | |||
1418 | llvm::MDNode::get(VMContext, addressQuals)); | |||
1419 | Fn->setMetadata("kernel_arg_access_qual", | |||
1420 | llvm::MDNode::get(VMContext, accessQuals)); | |||
1421 | Fn->setMetadata("kernel_arg_type", | |||
1422 | llvm::MDNode::get(VMContext, argTypeNames)); | |||
1423 | Fn->setMetadata("kernel_arg_base_type", | |||
1424 | llvm::MDNode::get(VMContext, argBaseTypeNames)); | |||
1425 | Fn->setMetadata("kernel_arg_type_qual", | |||
1426 | llvm::MDNode::get(VMContext, argTypeQuals)); | |||
1427 | if (getCodeGenOpts().EmitOpenCLArgMetadata) | |||
1428 | Fn->setMetadata("kernel_arg_name", | |||
1429 | llvm::MDNode::get(VMContext, argNames)); | |||
1430 | } | |||
1431 | ||||
1432 | /// Determines whether the language options require us to model | |||
1433 | /// unwind exceptions. We treat -fexceptions as mandating this | |||
1434 | /// except under the fragile ObjC ABI with only ObjC exceptions | |||
1435 | /// enabled. This means, for example, that C with -fexceptions | |||
1436 | /// enables this. | |||
1437 | static bool hasUnwindExceptions(const LangOptions &LangOpts) { | |||
1438 | // If exceptions are completely disabled, obviously this is false. | |||
1439 | if (!LangOpts.Exceptions) return false; | |||
1440 | ||||
1441 | // If C++ exceptions are enabled, this is true. | |||
1442 | if (LangOpts.CXXExceptions) return true; | |||
1443 | ||||
1444 | // If ObjC exceptions are enabled, this depends on the ABI. | |||
1445 | if (LangOpts.ObjCExceptions) { | |||
1446 | return LangOpts.ObjCRuntime.hasUnwindExceptions(); | |||
1447 | } | |||
1448 | ||||
1449 | return true; | |||
1450 | } | |||
1451 | ||||
1452 | static bool requiresMemberFunctionPointerTypeMetadata(CodeGenModule &CGM, | |||
1453 | const CXXMethodDecl *MD) { | |||
1454 | // Check that the type metadata can ever actually be used by a call. | |||
1455 | if (!CGM.getCodeGenOpts().LTOUnit || | |||
1456 | !CGM.HasHiddenLTOVisibility(MD->getParent())) | |||
1457 | return false; | |||
1458 | ||||
1459 | // Only functions whose address can be taken with a member function pointer | |||
1460 | // need this sort of type metadata. | |||
1461 | return !MD->isStatic() && !MD->isVirtual() && !isa<CXXConstructorDecl>(MD) && | |||
1462 | !isa<CXXDestructorDecl>(MD); | |||
1463 | } | |||
1464 | ||||
1465 | std::vector<const CXXRecordDecl *> | |||
1466 | CodeGenModule::getMostBaseClasses(const CXXRecordDecl *RD) { | |||
1467 | llvm::SetVector<const CXXRecordDecl *> MostBases; | |||
1468 | ||||
1469 | std::function<void (const CXXRecordDecl *)> CollectMostBases; | |||
1470 | CollectMostBases = [&](const CXXRecordDecl *RD) { | |||
1471 | if (RD->getNumBases() == 0) | |||
1472 | MostBases.insert(RD); | |||
1473 | for (const CXXBaseSpecifier &B : RD->bases()) | |||
1474 | CollectMostBases(B.getType()->getAsCXXRecordDecl()); | |||
1475 | }; | |||
1476 | CollectMostBases(RD); | |||
1477 | return MostBases.takeVector(); | |||
1478 | } | |||
1479 | ||||
1480 | void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D, | |||
1481 | llvm::Function *F) { | |||
1482 | llvm::AttrBuilder B; | |||
1483 | ||||
1484 | if (CodeGenOpts.UnwindTables) | |||
1485 | B.addAttribute(llvm::Attribute::UWTable); | |||
1486 | ||||
1487 | if (!hasUnwindExceptions(LangOpts)) | |||
1488 | B.addAttribute(llvm::Attribute::NoUnwind); | |||
1489 | ||||
1490 | if (!D || !D->hasAttr<NoStackProtectorAttr>()) { | |||
1491 | if (LangOpts.getStackProtector() == LangOptions::SSPOn) | |||
1492 | B.addAttribute(llvm::Attribute::StackProtect); | |||
1493 | else if (LangOpts.getStackProtector() == LangOptions::SSPStrong) | |||
1494 | B.addAttribute(llvm::Attribute::StackProtectStrong); | |||
1495 | else if (LangOpts.getStackProtector() == LangOptions::SSPReq) | |||
1496 | B.addAttribute(llvm::Attribute::StackProtectReq); | |||
1497 | } | |||
1498 | ||||
1499 | if (!D) { | |||
1500 | // If we don't have a declaration to control inlining, the function isn't | |||
1501 | // explicitly marked as alwaysinline for semantic reasons, and inlining is | |||
1502 | // disabled, mark the function as noinline. | |||
1503 | if (!F->hasFnAttribute(llvm::Attribute::AlwaysInline) && | |||
1504 | CodeGenOpts.getInlining() == CodeGenOptions::OnlyAlwaysInlining) | |||
1505 | B.addAttribute(llvm::Attribute::NoInline); | |||
1506 | ||||
1507 | F->addAttributes(llvm::AttributeList::FunctionIndex, B); | |||
1508 | return; | |||
1509 | } | |||
1510 | ||||
1511 | // Track whether we need to add the optnone LLVM attribute, | |||
1512 | // starting with the default for this optimization level. | |||
1513 | bool ShouldAddOptNone = | |||
1514 | !CodeGenOpts.DisableO0ImplyOptNone && CodeGenOpts.OptimizationLevel == 0; | |||
1515 | // We can't add optnone in the following cases, it won't pass the verifier. | |||
1516 | ShouldAddOptNone &= !D->hasAttr<MinSizeAttr>(); | |||
1517 | ShouldAddOptNone &= !F->hasFnAttribute(llvm::Attribute::AlwaysInline); | |||
1518 | ShouldAddOptNone &= !D->hasAttr<AlwaysInlineAttr>(); | |||
1519 | ||||
1520 | if (ShouldAddOptNone || D->hasAttr<OptimizeNoneAttr>()) { | |||
1521 | B.addAttribute(llvm::Attribute::OptimizeNone); | |||
1522 | ||||
1523 | // OptimizeNone implies noinline; we should not be inlining such functions. | |||
1524 | B.addAttribute(llvm::Attribute::NoInline); | |||
1525 | assert(!F->hasFnAttribute(llvm::Attribute::AlwaysInline) &&((!F->hasFnAttribute(llvm::Attribute::AlwaysInline) && "OptimizeNone and AlwaysInline on same function!") ? static_cast <void> (0) : __assert_fail ("!F->hasFnAttribute(llvm::Attribute::AlwaysInline) && \"OptimizeNone and AlwaysInline on same function!\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1526, __PRETTY_FUNCTION__)) | |||
1526 | "OptimizeNone and AlwaysInline on same function!")((!F->hasFnAttribute(llvm::Attribute::AlwaysInline) && "OptimizeNone and AlwaysInline on same function!") ? static_cast <void> (0) : __assert_fail ("!F->hasFnAttribute(llvm::Attribute::AlwaysInline) && \"OptimizeNone and AlwaysInline on same function!\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1526, __PRETTY_FUNCTION__)); | |||
1527 | ||||
1528 | // We still need to handle naked functions even though optnone subsumes | |||
1529 | // much of their semantics. | |||
1530 | if (D->hasAttr<NakedAttr>()) | |||
1531 | B.addAttribute(llvm::Attribute::Naked); | |||
1532 | ||||
1533 | // OptimizeNone wins over OptimizeForSize and MinSize. | |||
1534 | F->removeFnAttr(llvm::Attribute::OptimizeForSize); | |||
1535 | F->removeFnAttr(llvm::Attribute::MinSize); | |||
1536 | } else if (D->hasAttr<NakedAttr>()) { | |||
1537 | // Naked implies noinline: we should not be inlining such functions. | |||
1538 | B.addAttribute(llvm::Attribute::Naked); | |||
1539 | B.addAttribute(llvm::Attribute::NoInline); | |||
1540 | } else if (D->hasAttr<NoDuplicateAttr>()) { | |||
1541 | B.addAttribute(llvm::Attribute::NoDuplicate); | |||
1542 | } else if (D->hasAttr<NoInlineAttr>()) { | |||
1543 | B.addAttribute(llvm::Attribute::NoInline); | |||
1544 | } else if (D->hasAttr<AlwaysInlineAttr>() && | |||
1545 | !F->hasFnAttribute(llvm::Attribute::NoInline)) { | |||
1546 | // (noinline wins over always_inline, and we can't specify both in IR) | |||
1547 | B.addAttribute(llvm::Attribute::AlwaysInline); | |||
1548 | } else if (CodeGenOpts.getInlining() == CodeGenOptions::OnlyAlwaysInlining) { | |||
1549 | // If we're not inlining, then force everything that isn't always_inline to | |||
1550 | // carry an explicit noinline attribute. | |||
1551 | if (!F->hasFnAttribute(llvm::Attribute::AlwaysInline)) | |||
1552 | B.addAttribute(llvm::Attribute::NoInline); | |||
1553 | } else { | |||
1554 | // Otherwise, propagate the inline hint attribute and potentially use its | |||
1555 | // absence to mark things as noinline. | |||
1556 | if (auto *FD = dyn_cast<FunctionDecl>(D)) { | |||
1557 | // Search function and template pattern redeclarations for inline. | |||
1558 | auto CheckForInline = [](const FunctionDecl *FD) { | |||
1559 | auto CheckRedeclForInline = [](const FunctionDecl *Redecl) { | |||
1560 | return Redecl->isInlineSpecified(); | |||
1561 | }; | |||
1562 | if (any_of(FD->redecls(), CheckRedeclForInline)) | |||
1563 | return true; | |||
1564 | const FunctionDecl *Pattern = FD->getTemplateInstantiationPattern(); | |||
1565 | if (!Pattern) | |||
1566 | return false; | |||
1567 | return any_of(Pattern->redecls(), CheckRedeclForInline); | |||
1568 | }; | |||
1569 | if (CheckForInline(FD)) { | |||
1570 | B.addAttribute(llvm::Attribute::InlineHint); | |||
1571 | } else if (CodeGenOpts.getInlining() == | |||
1572 | CodeGenOptions::OnlyHintInlining && | |||
1573 | !FD->isInlined() && | |||
1574 | !F->hasFnAttribute(llvm::Attribute::AlwaysInline)) { | |||
1575 | B.addAttribute(llvm::Attribute::NoInline); | |||
1576 | } | |||
1577 | } | |||
1578 | } | |||
1579 | ||||
1580 | // Add other optimization related attributes if we are optimizing this | |||
1581 | // function. | |||
1582 | if (!D->hasAttr<OptimizeNoneAttr>()) { | |||
1583 | if (D->hasAttr<ColdAttr>()) { | |||
1584 | if (!ShouldAddOptNone) | |||
1585 | B.addAttribute(llvm::Attribute::OptimizeForSize); | |||
1586 | B.addAttribute(llvm::Attribute::Cold); | |||
1587 | } | |||
1588 | ||||
1589 | if (D->hasAttr<MinSizeAttr>()) | |||
1590 | B.addAttribute(llvm::Attribute::MinSize); | |||
1591 | } | |||
1592 | ||||
1593 | F->addAttributes(llvm::AttributeList::FunctionIndex, B); | |||
1594 | ||||
1595 | unsigned alignment = D->getMaxAlignment() / Context.getCharWidth(); | |||
1596 | if (alignment) | |||
1597 | F->setAlignment(llvm::Align(alignment)); | |||
1598 | ||||
1599 | if (!D->hasAttr<AlignedAttr>()) | |||
1600 | if (LangOpts.FunctionAlignment) | |||
1601 | F->setAlignment(llvm::Align(1ull << LangOpts.FunctionAlignment)); | |||
1602 | ||||
1603 | // Some C++ ABIs require 2-byte alignment for member functions, in order to | |||
1604 | // reserve a bit for differentiating between virtual and non-virtual member | |||
1605 | // functions. If the current target's C++ ABI requires this and this is a | |||
1606 | // member function, set its alignment accordingly. | |||
1607 | if (getTarget().getCXXABI().areMemberFunctionsAligned()) { | |||
1608 | if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D)) | |||
1609 | F->setAlignment(llvm::Align(2)); | |||
1610 | } | |||
1611 | ||||
1612 | // In the cross-dso CFI mode with canonical jump tables, we want !type | |||
1613 | // attributes on definitions only. | |||
1614 | if (CodeGenOpts.SanitizeCfiCrossDso && | |||
1615 | CodeGenOpts.SanitizeCfiCanonicalJumpTables) { | |||
1616 | if (auto *FD = dyn_cast<FunctionDecl>(D)) { | |||
1617 | // Skip available_externally functions. They won't be codegen'ed in the | |||
1618 | // current module anyway. | |||
1619 | if (getContext().GetGVALinkageForFunction(FD) != GVA_AvailableExternally) | |||
1620 | CreateFunctionTypeMetadataForIcall(FD, F); | |||
1621 | } | |||
1622 | } | |||
1623 | ||||
1624 | // Emit type metadata on member functions for member function pointer checks. | |||
1625 | // These are only ever necessary on definitions; we're guaranteed that the | |||
1626 | // definition will be present in the LTO unit as a result of LTO visibility. | |||
1627 | auto *MD = dyn_cast<CXXMethodDecl>(D); | |||
1628 | if (MD && requiresMemberFunctionPointerTypeMetadata(*this, MD)) { | |||
1629 | for (const CXXRecordDecl *Base : getMostBaseClasses(MD->getParent())) { | |||
1630 | llvm::Metadata *Id = | |||
1631 | CreateMetadataIdentifierForType(Context.getMemberPointerType( | |||
1632 | MD->getType(), Context.getRecordType(Base).getTypePtr())); | |||
1633 | F->addTypeMetadata(0, Id); | |||
1634 | } | |||
1635 | } | |||
1636 | } | |||
1637 | ||||
1638 | void CodeGenModule::SetCommonAttributes(GlobalDecl GD, llvm::GlobalValue *GV) { | |||
1639 | const Decl *D = GD.getDecl(); | |||
1640 | if (dyn_cast_or_null<NamedDecl>(D)) | |||
1641 | setGVProperties(GV, GD); | |||
1642 | else | |||
1643 | GV->setVisibility(llvm::GlobalValue::DefaultVisibility); | |||
1644 | ||||
1645 | if (D && D->hasAttr<UsedAttr>()) | |||
1646 | addUsedGlobal(GV); | |||
1647 | ||||
1648 | if (CodeGenOpts.KeepStaticConsts && D && isa<VarDecl>(D)) { | |||
1649 | const auto *VD = cast<VarDecl>(D); | |||
1650 | if (VD->getType().isConstQualified() && | |||
1651 | VD->getStorageDuration() == SD_Static) | |||
1652 | addUsedGlobal(GV); | |||
1653 | } | |||
1654 | } | |||
1655 | ||||
1656 | bool CodeGenModule::GetCPUAndFeaturesAttributes(GlobalDecl GD, | |||
1657 | llvm::AttrBuilder &Attrs) { | |||
1658 | // Add target-cpu and target-features attributes to functions. If | |||
1659 | // we have a decl for the function and it has a target attribute then | |||
1660 | // parse that and add it to the feature set. | |||
1661 | StringRef TargetCPU = getTarget().getTargetOpts().CPU; | |||
1662 | std::vector<std::string> Features; | |||
1663 | const auto *FD = dyn_cast_or_null<FunctionDecl>(GD.getDecl()); | |||
1664 | FD = FD ? FD->getMostRecentDecl() : FD; | |||
1665 | const auto *TD = FD ? FD->getAttr<TargetAttr>() : nullptr; | |||
1666 | const auto *SD = FD ? FD->getAttr<CPUSpecificAttr>() : nullptr; | |||
1667 | bool AddedAttr = false; | |||
1668 | if (TD || SD) { | |||
1669 | llvm::StringMap<bool> FeatureMap; | |||
1670 | getFunctionFeatureMap(FeatureMap, GD); | |||
1671 | ||||
1672 | // Produce the canonical string for this set of features. | |||
1673 | for (const llvm::StringMap<bool>::value_type &Entry : FeatureMap) | |||
1674 | Features.push_back((Entry.getValue() ? "+" : "-") + Entry.getKey().str()); | |||
1675 | ||||
1676 | // Now add the target-cpu and target-features to the function. | |||
1677 | // While we populated the feature map above, we still need to | |||
1678 | // get and parse the target attribute so we can get the cpu for | |||
1679 | // the function. | |||
1680 | if (TD) { | |||
1681 | TargetAttr::ParsedTargetAttr ParsedAttr = TD->parse(); | |||
1682 | if (ParsedAttr.Architecture != "" && | |||
1683 | getTarget().isValidCPUName(ParsedAttr.Architecture)) | |||
1684 | TargetCPU = ParsedAttr.Architecture; | |||
1685 | } | |||
1686 | } else { | |||
1687 | // Otherwise just add the existing target cpu and target features to the | |||
1688 | // function. | |||
1689 | Features = getTarget().getTargetOpts().Features; | |||
1690 | } | |||
1691 | ||||
1692 | if (TargetCPU != "") { | |||
1693 | Attrs.addAttribute("target-cpu", TargetCPU); | |||
1694 | AddedAttr = true; | |||
1695 | } | |||
1696 | if (!Features.empty()) { | |||
1697 | llvm::sort(Features); | |||
1698 | Attrs.addAttribute("target-features", llvm::join(Features, ",")); | |||
1699 | AddedAttr = true; | |||
1700 | } | |||
1701 | ||||
1702 | return AddedAttr; | |||
1703 | } | |||
1704 | ||||
1705 | void CodeGenModule::setNonAliasAttributes(GlobalDecl GD, | |||
1706 | llvm::GlobalObject *GO) { | |||
1707 | const Decl *D = GD.getDecl(); | |||
1708 | SetCommonAttributes(GD, GO); | |||
1709 | ||||
1710 | if (D) { | |||
1711 | if (auto *GV = dyn_cast<llvm::GlobalVariable>(GO)) { | |||
1712 | if (auto *SA = D->getAttr<PragmaClangBSSSectionAttr>()) | |||
1713 | GV->addAttribute("bss-section", SA->getName()); | |||
1714 | if (auto *SA = D->getAttr<PragmaClangDataSectionAttr>()) | |||
1715 | GV->addAttribute("data-section", SA->getName()); | |||
1716 | if (auto *SA = D->getAttr<PragmaClangRodataSectionAttr>()) | |||
1717 | GV->addAttribute("rodata-section", SA->getName()); | |||
1718 | if (auto *SA = D->getAttr<PragmaClangRelroSectionAttr>()) | |||
1719 | GV->addAttribute("relro-section", SA->getName()); | |||
1720 | } | |||
1721 | ||||
1722 | if (auto *F = dyn_cast<llvm::Function>(GO)) { | |||
1723 | if (auto *SA = D->getAttr<PragmaClangTextSectionAttr>()) | |||
1724 | if (!D->getAttr<SectionAttr>()) | |||
1725 | F->addFnAttr("implicit-section-name", SA->getName()); | |||
1726 | ||||
1727 | llvm::AttrBuilder Attrs; | |||
1728 | if (GetCPUAndFeaturesAttributes(GD, Attrs)) { | |||
1729 | // We know that GetCPUAndFeaturesAttributes will always have the | |||
1730 | // newest set, since it has the newest possible FunctionDecl, so the | |||
1731 | // new ones should replace the old. | |||
1732 | F->removeFnAttr("target-cpu"); | |||
1733 | F->removeFnAttr("target-features"); | |||
1734 | F->addAttributes(llvm::AttributeList::FunctionIndex, Attrs); | |||
1735 | } | |||
1736 | } | |||
1737 | ||||
1738 | if (const auto *CSA = D->getAttr<CodeSegAttr>()) | |||
1739 | GO->setSection(CSA->getName()); | |||
1740 | else if (const auto *SA = D->getAttr<SectionAttr>()) | |||
1741 | GO->setSection(SA->getName()); | |||
1742 | } | |||
1743 | ||||
1744 | getTargetCodeGenInfo().setTargetAttributes(D, GO, *this); | |||
1745 | } | |||
1746 | ||||
1747 | void CodeGenModule::SetInternalFunctionAttributes(GlobalDecl GD, | |||
1748 | llvm::Function *F, | |||
1749 | const CGFunctionInfo &FI) { | |||
1750 | const Decl *D = GD.getDecl(); | |||
1751 | SetLLVMFunctionAttributes(GD, FI, F); | |||
1752 | SetLLVMFunctionAttributesForDefinition(D, F); | |||
1753 | ||||
1754 | F->setLinkage(llvm::Function::InternalLinkage); | |||
1755 | ||||
1756 | setNonAliasAttributes(GD, F); | |||
1757 | } | |||
1758 | ||||
1759 | static void setLinkageForGV(llvm::GlobalValue *GV, const NamedDecl *ND) { | |||
1760 | // Set linkage and visibility in case we never see a definition. | |||
1761 | LinkageInfo LV = ND->getLinkageAndVisibility(); | |||
1762 | // Don't set internal linkage on declarations. | |||
1763 | // "extern_weak" is overloaded in LLVM; we probably should have | |||
1764 | // separate linkage types for this. | |||
1765 | if (isExternallyVisible(LV.getLinkage()) && | |||
1766 | (ND->hasAttr<WeakAttr>() || ND->isWeakImported())) | |||
1767 | GV->setLinkage(llvm::GlobalValue::ExternalWeakLinkage); | |||
1768 | } | |||
1769 | ||||
1770 | void CodeGenModule::CreateFunctionTypeMetadataForIcall(const FunctionDecl *FD, | |||
1771 | llvm::Function *F) { | |||
1772 | // Only if we are checking indirect calls. | |||
1773 | if (!LangOpts.Sanitize.has(SanitizerKind::CFIICall)) | |||
1774 | return; | |||
1775 | ||||
1776 | // Non-static class methods are handled via vtable or member function pointer | |||
1777 | // checks elsewhere. | |||
1778 | if (isa<CXXMethodDecl>(FD) && !cast<CXXMethodDecl>(FD)->isStatic()) | |||
1779 | return; | |||
1780 | ||||
1781 | llvm::Metadata *MD = CreateMetadataIdentifierForType(FD->getType()); | |||
1782 | F->addTypeMetadata(0, MD); | |||
1783 | F->addTypeMetadata(0, CreateMetadataIdentifierGeneralized(FD->getType())); | |||
1784 | ||||
1785 | // Emit a hash-based bit set entry for cross-DSO calls. | |||
1786 | if (CodeGenOpts.SanitizeCfiCrossDso) | |||
1787 | if (auto CrossDsoTypeId = CreateCrossDsoCfiTypeId(MD)) | |||
1788 | F->addTypeMetadata(0, llvm::ConstantAsMetadata::get(CrossDsoTypeId)); | |||
1789 | } | |||
1790 | ||||
1791 | void CodeGenModule::SetFunctionAttributes(GlobalDecl GD, llvm::Function *F, | |||
1792 | bool IsIncompleteFunction, | |||
1793 | bool IsThunk) { | |||
1794 | ||||
1795 | if (llvm::Intrinsic::ID IID = F->getIntrinsicID()) { | |||
1796 | // If this is an intrinsic function, set the function's attributes | |||
1797 | // to the intrinsic's attributes. | |||
1798 | F->setAttributes(llvm::Intrinsic::getAttributes(getLLVMContext(), IID)); | |||
1799 | return; | |||
1800 | } | |||
1801 | ||||
1802 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
1803 | ||||
1804 | if (!IsIncompleteFunction) | |||
1805 | SetLLVMFunctionAttributes(GD, getTypes().arrangeGlobalDeclaration(GD), F); | |||
1806 | ||||
1807 | // Add the Returned attribute for "this", except for iOS 5 and earlier | |||
1808 | // where substantial code, including the libstdc++ dylib, was compiled with | |||
1809 | // GCC and does not actually return "this". | |||
1810 | if (!IsThunk && getCXXABI().HasThisReturn(GD) && | |||
1811 | !(getTriple().isiOS() && getTriple().isOSVersionLT(6))) { | |||
1812 | assert(!F->arg_empty() &&((!F->arg_empty() && F->arg_begin()->getType () ->canLosslesslyBitCastTo(F->getReturnType()) && "unexpected this return") ? static_cast<void> (0) : __assert_fail ("!F->arg_empty() && F->arg_begin()->getType() ->canLosslesslyBitCastTo(F->getReturnType()) && \"unexpected this return\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1815, __PRETTY_FUNCTION__)) | |||
1813 | F->arg_begin()->getType()((!F->arg_empty() && F->arg_begin()->getType () ->canLosslesslyBitCastTo(F->getReturnType()) && "unexpected this return") ? static_cast<void> (0) : __assert_fail ("!F->arg_empty() && F->arg_begin()->getType() ->canLosslesslyBitCastTo(F->getReturnType()) && \"unexpected this return\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1815, __PRETTY_FUNCTION__)) | |||
1814 | ->canLosslesslyBitCastTo(F->getReturnType()) &&((!F->arg_empty() && F->arg_begin()->getType () ->canLosslesslyBitCastTo(F->getReturnType()) && "unexpected this return") ? static_cast<void> (0) : __assert_fail ("!F->arg_empty() && F->arg_begin()->getType() ->canLosslesslyBitCastTo(F->getReturnType()) && \"unexpected this return\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1815, __PRETTY_FUNCTION__)) | |||
1815 | "unexpected this return")((!F->arg_empty() && F->arg_begin()->getType () ->canLosslesslyBitCastTo(F->getReturnType()) && "unexpected this return") ? static_cast<void> (0) : __assert_fail ("!F->arg_empty() && F->arg_begin()->getType() ->canLosslesslyBitCastTo(F->getReturnType()) && \"unexpected this return\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1815, __PRETTY_FUNCTION__)); | |||
1816 | F->addAttribute(1, llvm::Attribute::Returned); | |||
1817 | } | |||
1818 | ||||
1819 | // Only a few attributes are set on declarations; these may later be | |||
1820 | // overridden by a definition. | |||
1821 | ||||
1822 | setLinkageForGV(F, FD); | |||
1823 | setGVProperties(F, FD); | |||
1824 | ||||
1825 | // Setup target-specific attributes. | |||
1826 | if (!IsIncompleteFunction && F->isDeclaration()) | |||
1827 | getTargetCodeGenInfo().setTargetAttributes(FD, F, *this); | |||
1828 | ||||
1829 | if (const auto *CSA = FD->getAttr<CodeSegAttr>()) | |||
1830 | F->setSection(CSA->getName()); | |||
1831 | else if (const auto *SA = FD->getAttr<SectionAttr>()) | |||
1832 | F->setSection(SA->getName()); | |||
1833 | ||||
1834 | if (FD->isReplaceableGlobalAllocationFunction()) { | |||
1835 | // A replaceable global allocation function does not act like a builtin by | |||
1836 | // default, only if it is invoked by a new-expression or delete-expression. | |||
1837 | F->addAttribute(llvm::AttributeList::FunctionIndex, | |||
1838 | llvm::Attribute::NoBuiltin); | |||
1839 | ||||
1840 | // A sane operator new returns a non-aliasing pointer. | |||
1841 | // FIXME: Also add NonNull attribute to the return value | |||
1842 | // for the non-nothrow forms? | |||
1843 | auto Kind = FD->getDeclName().getCXXOverloadedOperator(); | |||
1844 | if (getCodeGenOpts().AssumeSaneOperatorNew && | |||
1845 | (Kind == OO_New || Kind == OO_Array_New)) | |||
1846 | F->addAttribute(llvm::AttributeList::ReturnIndex, | |||
1847 | llvm::Attribute::NoAlias); | |||
1848 | } | |||
1849 | ||||
1850 | if (isa<CXXConstructorDecl>(FD) || isa<CXXDestructorDecl>(FD)) | |||
1851 | F->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
1852 | else if (const auto *MD = dyn_cast<CXXMethodDecl>(FD)) | |||
1853 | if (MD->isVirtual()) | |||
1854 | F->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
1855 | ||||
1856 | // Don't emit entries for function declarations in the cross-DSO mode. This | |||
1857 | // is handled with better precision by the receiving DSO. But if jump tables | |||
1858 | // are non-canonical then we need type metadata in order to produce the local | |||
1859 | // jump table. | |||
1860 | if (!CodeGenOpts.SanitizeCfiCrossDso || | |||
1861 | !CodeGenOpts.SanitizeCfiCanonicalJumpTables) | |||
1862 | CreateFunctionTypeMetadataForIcall(FD, F); | |||
1863 | ||||
1864 | if (getLangOpts().OpenMP && FD->hasAttr<OMPDeclareSimdDeclAttr>()) | |||
1865 | getOpenMPRuntime().emitDeclareSimdFunction(FD, F); | |||
1866 | ||||
1867 | if (const auto *CB = FD->getAttr<CallbackAttr>()) { | |||
1868 | // Annotate the callback behavior as metadata: | |||
1869 | // - The callback callee (as argument number). | |||
1870 | // - The callback payloads (as argument numbers). | |||
1871 | llvm::LLVMContext &Ctx = F->getContext(); | |||
1872 | llvm::MDBuilder MDB(Ctx); | |||
1873 | ||||
1874 | // The payload indices are all but the first one in the encoding. The first | |||
1875 | // identifies the callback callee. | |||
1876 | int CalleeIdx = *CB->encoding_begin(); | |||
1877 | ArrayRef<int> PayloadIndices(CB->encoding_begin() + 1, CB->encoding_end()); | |||
1878 | F->addMetadata(llvm::LLVMContext::MD_callback, | |||
1879 | *llvm::MDNode::get(Ctx, {MDB.createCallbackEncoding( | |||
1880 | CalleeIdx, PayloadIndices, | |||
1881 | /* VarArgsArePassed */ false)})); | |||
1882 | } | |||
1883 | } | |||
1884 | ||||
1885 | void CodeGenModule::addUsedGlobal(llvm::GlobalValue *GV) { | |||
1886 | assert(!GV->isDeclaration() &&((!GV->isDeclaration() && "Only globals with definition can force usage." ) ? static_cast<void> (0) : __assert_fail ("!GV->isDeclaration() && \"Only globals with definition can force usage.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1887, __PRETTY_FUNCTION__)) | |||
1887 | "Only globals with definition can force usage.")((!GV->isDeclaration() && "Only globals with definition can force usage." ) ? static_cast<void> (0) : __assert_fail ("!GV->isDeclaration() && \"Only globals with definition can force usage.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1887, __PRETTY_FUNCTION__)); | |||
1888 | LLVMUsed.emplace_back(GV); | |||
1889 | } | |||
1890 | ||||
1891 | void CodeGenModule::addCompilerUsedGlobal(llvm::GlobalValue *GV) { | |||
1892 | assert(!GV->isDeclaration() &&((!GV->isDeclaration() && "Only globals with definition can force usage." ) ? static_cast<void> (0) : __assert_fail ("!GV->isDeclaration() && \"Only globals with definition can force usage.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1893, __PRETTY_FUNCTION__)) | |||
1893 | "Only globals with definition can force usage.")((!GV->isDeclaration() && "Only globals with definition can force usage." ) ? static_cast<void> (0) : __assert_fail ("!GV->isDeclaration() && \"Only globals with definition can force usage.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 1893, __PRETTY_FUNCTION__)); | |||
1894 | LLVMCompilerUsed.emplace_back(GV); | |||
1895 | } | |||
1896 | ||||
1897 | static void emitUsed(CodeGenModule &CGM, StringRef Name, | |||
1898 | std::vector<llvm::WeakTrackingVH> &List) { | |||
1899 | // Don't create llvm.used if there is no need. | |||
1900 | if (List.empty()) | |||
1901 | return; | |||
1902 | ||||
1903 | // Convert List to what ConstantArray needs. | |||
1904 | SmallVector<llvm::Constant*, 8> UsedArray; | |||
1905 | UsedArray.resize(List.size()); | |||
1906 | for (unsigned i = 0, e = List.size(); i != e; ++i) { | |||
1907 | UsedArray[i] = | |||
1908 | llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast( | |||
1909 | cast<llvm::Constant>(&*List[i]), CGM.Int8PtrTy); | |||
1910 | } | |||
1911 | ||||
1912 | if (UsedArray.empty()) | |||
1913 | return; | |||
1914 | llvm::ArrayType *ATy = llvm::ArrayType::get(CGM.Int8PtrTy, UsedArray.size()); | |||
1915 | ||||
1916 | auto *GV = new llvm::GlobalVariable( | |||
1917 | CGM.getModule(), ATy, false, llvm::GlobalValue::AppendingLinkage, | |||
1918 | llvm::ConstantArray::get(ATy, UsedArray), Name); | |||
1919 | ||||
1920 | GV->setSection("llvm.metadata"); | |||
1921 | } | |||
1922 | ||||
1923 | void CodeGenModule::emitLLVMUsed() { | |||
1924 | emitUsed(*this, "llvm.used", LLVMUsed); | |||
1925 | emitUsed(*this, "llvm.compiler.used", LLVMCompilerUsed); | |||
1926 | } | |||
1927 | ||||
1928 | void CodeGenModule::AppendLinkerOptions(StringRef Opts) { | |||
1929 | auto *MDOpts = llvm::MDString::get(getLLVMContext(), Opts); | |||
1930 | LinkerOptionsMetadata.push_back(llvm::MDNode::get(getLLVMContext(), MDOpts)); | |||
1931 | } | |||
1932 | ||||
1933 | void CodeGenModule::AddDetectMismatch(StringRef Name, StringRef Value) { | |||
1934 | llvm::SmallString<32> Opt; | |||
1935 | getTargetCodeGenInfo().getDetectMismatchOption(Name, Value, Opt); | |||
1936 | if (Opt.empty()) | |||
1937 | return; | |||
1938 | auto *MDOpts = llvm::MDString::get(getLLVMContext(), Opt); | |||
1939 | LinkerOptionsMetadata.push_back(llvm::MDNode::get(getLLVMContext(), MDOpts)); | |||
1940 | } | |||
1941 | ||||
1942 | void CodeGenModule::AddDependentLib(StringRef Lib) { | |||
1943 | auto &C = getLLVMContext(); | |||
1944 | if (getTarget().getTriple().isOSBinFormatELF()) { | |||
1945 | ELFDependentLibraries.push_back( | |||
1946 | llvm::MDNode::get(C, llvm::MDString::get(C, Lib))); | |||
1947 | return; | |||
1948 | } | |||
1949 | ||||
1950 | llvm::SmallString<24> Opt; | |||
1951 | getTargetCodeGenInfo().getDependentLibraryOption(Lib, Opt); | |||
1952 | auto *MDOpts = llvm::MDString::get(getLLVMContext(), Opt); | |||
1953 | LinkerOptionsMetadata.push_back(llvm::MDNode::get(C, MDOpts)); | |||
1954 | } | |||
1955 | ||||
1956 | /// Add link options implied by the given module, including modules | |||
1957 | /// it depends on, using a postorder walk. | |||
1958 | static void addLinkOptionsPostorder(CodeGenModule &CGM, Module *Mod, | |||
1959 | SmallVectorImpl<llvm::MDNode *> &Metadata, | |||
1960 | llvm::SmallPtrSet<Module *, 16> &Visited) { | |||
1961 | // Import this module's parent. | |||
1962 | if (Mod->Parent && Visited.insert(Mod->Parent).second) { | |||
1963 | addLinkOptionsPostorder(CGM, Mod->Parent, Metadata, Visited); | |||
1964 | } | |||
1965 | ||||
1966 | // Import this module's dependencies. | |||
1967 | for (unsigned I = Mod->Imports.size(); I > 0; --I) { | |||
1968 | if (Visited.insert(Mod->Imports[I - 1]).second) | |||
1969 | addLinkOptionsPostorder(CGM, Mod->Imports[I-1], Metadata, Visited); | |||
1970 | } | |||
1971 | ||||
1972 | // Add linker options to link against the libraries/frameworks | |||
1973 | // described by this module. | |||
1974 | llvm::LLVMContext &Context = CGM.getLLVMContext(); | |||
1975 | bool IsELF = CGM.getTarget().getTriple().isOSBinFormatELF(); | |||
1976 | ||||
1977 | // For modules that use export_as for linking, use that module | |||
1978 | // name instead. | |||
1979 | if (Mod->UseExportAsModuleLinkName) | |||
1980 | return; | |||
1981 | ||||
1982 | for (unsigned I = Mod->LinkLibraries.size(); I > 0; --I) { | |||
1983 | // Link against a framework. Frameworks are currently Darwin only, so we | |||
1984 | // don't to ask TargetCodeGenInfo for the spelling of the linker option. | |||
1985 | if (Mod->LinkLibraries[I-1].IsFramework) { | |||
1986 | llvm::Metadata *Args[2] = { | |||
1987 | llvm::MDString::get(Context, "-framework"), | |||
1988 | llvm::MDString::get(Context, Mod->LinkLibraries[I - 1].Library)}; | |||
1989 | ||||
1990 | Metadata.push_back(llvm::MDNode::get(Context, Args)); | |||
1991 | continue; | |||
1992 | } | |||
1993 | ||||
1994 | // Link against a library. | |||
1995 | if (IsELF) { | |||
1996 | llvm::Metadata *Args[2] = { | |||
1997 | llvm::MDString::get(Context, "lib"), | |||
1998 | llvm::MDString::get(Context, Mod->LinkLibraries[I - 1].Library), | |||
1999 | }; | |||
2000 | Metadata.push_back(llvm::MDNode::get(Context, Args)); | |||
2001 | } else { | |||
2002 | llvm::SmallString<24> Opt; | |||
2003 | CGM.getTargetCodeGenInfo().getDependentLibraryOption( | |||
2004 | Mod->LinkLibraries[I - 1].Library, Opt); | |||
2005 | auto *OptString = llvm::MDString::get(Context, Opt); | |||
2006 | Metadata.push_back(llvm::MDNode::get(Context, OptString)); | |||
2007 | } | |||
2008 | } | |||
2009 | } | |||
2010 | ||||
2011 | void CodeGenModule::EmitModuleLinkOptions() { | |||
2012 | // Collect the set of all of the modules we want to visit to emit link | |||
2013 | // options, which is essentially the imported modules and all of their | |||
2014 | // non-explicit child modules. | |||
2015 | llvm::SetVector<clang::Module *> LinkModules; | |||
2016 | llvm::SmallPtrSet<clang::Module *, 16> Visited; | |||
2017 | SmallVector<clang::Module *, 16> Stack; | |||
2018 | ||||
2019 | // Seed the stack with imported modules. | |||
2020 | for (Module *M : ImportedModules) { | |||
2021 | // Do not add any link flags when an implementation TU of a module imports | |||
2022 | // a header of that same module. | |||
2023 | if (M->getTopLevelModuleName() == getLangOpts().CurrentModule && | |||
2024 | !getLangOpts().isCompilingModule()) | |||
2025 | continue; | |||
2026 | if (Visited.insert(M).second) | |||
2027 | Stack.push_back(M); | |||
2028 | } | |||
2029 | ||||
2030 | // Find all of the modules to import, making a little effort to prune | |||
2031 | // non-leaf modules. | |||
2032 | while (!Stack.empty()) { | |||
2033 | clang::Module *Mod = Stack.pop_back_val(); | |||
2034 | ||||
2035 | bool AnyChildren = false; | |||
2036 | ||||
2037 | // Visit the submodules of this module. | |||
2038 | for (const auto &SM : Mod->submodules()) { | |||
2039 | // Skip explicit children; they need to be explicitly imported to be | |||
2040 | // linked against. | |||
2041 | if (SM->IsExplicit) | |||
2042 | continue; | |||
2043 | ||||
2044 | if (Visited.insert(SM).second) { | |||
2045 | Stack.push_back(SM); | |||
2046 | AnyChildren = true; | |||
2047 | } | |||
2048 | } | |||
2049 | ||||
2050 | // We didn't find any children, so add this module to the list of | |||
2051 | // modules to link against. | |||
2052 | if (!AnyChildren) { | |||
2053 | LinkModules.insert(Mod); | |||
2054 | } | |||
2055 | } | |||
2056 | ||||
2057 | // Add link options for all of the imported modules in reverse topological | |||
2058 | // order. We don't do anything to try to order import link flags with respect | |||
2059 | // to linker options inserted by things like #pragma comment(). | |||
2060 | SmallVector<llvm::MDNode *, 16> MetadataArgs; | |||
2061 | Visited.clear(); | |||
2062 | for (Module *M : LinkModules) | |||
2063 | if (Visited.insert(M).second) | |||
2064 | addLinkOptionsPostorder(*this, M, MetadataArgs, Visited); | |||
2065 | std::reverse(MetadataArgs.begin(), MetadataArgs.end()); | |||
2066 | LinkerOptionsMetadata.append(MetadataArgs.begin(), MetadataArgs.end()); | |||
2067 | ||||
2068 | // Add the linker options metadata flag. | |||
2069 | auto *NMD = getModule().getOrInsertNamedMetadata("llvm.linker.options"); | |||
2070 | for (auto *MD : LinkerOptionsMetadata) | |||
2071 | NMD->addOperand(MD); | |||
2072 | } | |||
2073 | ||||
2074 | void CodeGenModule::EmitDeferred() { | |||
2075 | // Emit deferred declare target declarations. | |||
2076 | if (getLangOpts().OpenMP && !getLangOpts().OpenMPSimd) | |||
2077 | getOpenMPRuntime().emitDeferredTargetDecls(); | |||
2078 | ||||
2079 | // Emit code for any potentially referenced deferred decls. Since a | |||
2080 | // previously unused static decl may become used during the generation of code | |||
2081 | // for a static function, iterate until no changes are made. | |||
2082 | ||||
2083 | if (!DeferredVTables.empty()) { | |||
2084 | EmitDeferredVTables(); | |||
2085 | ||||
2086 | // Emitting a vtable doesn't directly cause more vtables to | |||
2087 | // become deferred, although it can cause functions to be | |||
2088 | // emitted that then need those vtables. | |||
2089 | assert(DeferredVTables.empty())((DeferredVTables.empty()) ? static_cast<void> (0) : __assert_fail ("DeferredVTables.empty()", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2089, __PRETTY_FUNCTION__)); | |||
2090 | } | |||
2091 | ||||
2092 | // Stop if we're out of both deferred vtables and deferred declarations. | |||
2093 | if (DeferredDeclsToEmit.empty()) | |||
2094 | return; | |||
2095 | ||||
2096 | // Grab the list of decls to emit. If EmitGlobalDefinition schedules more | |||
2097 | // work, it will not interfere with this. | |||
2098 | std::vector<GlobalDecl> CurDeclsToEmit; | |||
2099 | CurDeclsToEmit.swap(DeferredDeclsToEmit); | |||
2100 | ||||
2101 | for (GlobalDecl &D : CurDeclsToEmit) { | |||
2102 | // We should call GetAddrOfGlobal with IsForDefinition set to true in order | |||
2103 | // to get GlobalValue with exactly the type we need, not something that | |||
2104 | // might had been created for another decl with the same mangled name but | |||
2105 | // different type. | |||
2106 | llvm::GlobalValue *GV = dyn_cast<llvm::GlobalValue>( | |||
2107 | GetAddrOfGlobal(D, ForDefinition)); | |||
2108 | ||||
2109 | // In case of different address spaces, we may still get a cast, even with | |||
2110 | // IsForDefinition equal to true. Query mangled names table to get | |||
2111 | // GlobalValue. | |||
2112 | if (!GV) | |||
2113 | GV = GetGlobalValue(getMangledName(D)); | |||
2114 | ||||
2115 | // Make sure GetGlobalValue returned non-null. | |||
2116 | assert(GV)((GV) ? static_cast<void> (0) : __assert_fail ("GV", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2116, __PRETTY_FUNCTION__)); | |||
2117 | ||||
2118 | // Check to see if we've already emitted this. This is necessary | |||
2119 | // for a couple of reasons: first, decls can end up in the | |||
2120 | // deferred-decls queue multiple times, and second, decls can end | |||
2121 | // up with definitions in unusual ways (e.g. by an extern inline | |||
2122 | // function acquiring a strong function redefinition). Just | |||
2123 | // ignore these cases. | |||
2124 | if (!GV->isDeclaration()) | |||
2125 | continue; | |||
2126 | ||||
2127 | // If this is OpenMP, check if it is legal to emit this global normally. | |||
2128 | if (LangOpts.OpenMP && OpenMPRuntime && OpenMPRuntime->emitTargetGlobal(D)) | |||
2129 | continue; | |||
2130 | ||||
2131 | // Otherwise, emit the definition and move on to the next one. | |||
2132 | EmitGlobalDefinition(D, GV); | |||
2133 | ||||
2134 | // If we found out that we need to emit more decls, do that recursively. | |||
2135 | // This has the advantage that the decls are emitted in a DFS and related | |||
2136 | // ones are close together, which is convenient for testing. | |||
2137 | if (!DeferredVTables.empty() || !DeferredDeclsToEmit.empty()) { | |||
2138 | EmitDeferred(); | |||
2139 | assert(DeferredVTables.empty() && DeferredDeclsToEmit.empty())((DeferredVTables.empty() && DeferredDeclsToEmit.empty ()) ? static_cast<void> (0) : __assert_fail ("DeferredVTables.empty() && DeferredDeclsToEmit.empty()" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2139, __PRETTY_FUNCTION__)); | |||
2140 | } | |||
2141 | } | |||
2142 | } | |||
2143 | ||||
2144 | void CodeGenModule::EmitVTablesOpportunistically() { | |||
2145 | // Try to emit external vtables as available_externally if they have emitted | |||
2146 | // all inlined virtual functions. It runs after EmitDeferred() and therefore | |||
2147 | // is not allowed to create new references to things that need to be emitted | |||
2148 | // lazily. Note that it also uses fact that we eagerly emitting RTTI. | |||
2149 | ||||
2150 | assert((OpportunisticVTables.empty() || shouldOpportunisticallyEmitVTables())(((OpportunisticVTables.empty() || shouldOpportunisticallyEmitVTables ()) && "Only emit opportunistic vtables with optimizations" ) ? static_cast<void> (0) : __assert_fail ("(OpportunisticVTables.empty() || shouldOpportunisticallyEmitVTables()) && \"Only emit opportunistic vtables with optimizations\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2151, __PRETTY_FUNCTION__)) | |||
2151 | && "Only emit opportunistic vtables with optimizations")(((OpportunisticVTables.empty() || shouldOpportunisticallyEmitVTables ()) && "Only emit opportunistic vtables with optimizations" ) ? static_cast<void> (0) : __assert_fail ("(OpportunisticVTables.empty() || shouldOpportunisticallyEmitVTables()) && \"Only emit opportunistic vtables with optimizations\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2151, __PRETTY_FUNCTION__)); | |||
2152 | ||||
2153 | for (const CXXRecordDecl *RD : OpportunisticVTables) { | |||
2154 | assert(getVTables().isVTableExternal(RD) &&((getVTables().isVTableExternal(RD) && "This queue should only contain external vtables" ) ? static_cast<void> (0) : __assert_fail ("getVTables().isVTableExternal(RD) && \"This queue should only contain external vtables\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2155, __PRETTY_FUNCTION__)) | |||
2155 | "This queue should only contain external vtables")((getVTables().isVTableExternal(RD) && "This queue should only contain external vtables" ) ? static_cast<void> (0) : __assert_fail ("getVTables().isVTableExternal(RD) && \"This queue should only contain external vtables\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2155, __PRETTY_FUNCTION__)); | |||
2156 | if (getCXXABI().canSpeculativelyEmitVTable(RD)) | |||
2157 | VTables.GenerateClassData(RD); | |||
2158 | } | |||
2159 | OpportunisticVTables.clear(); | |||
2160 | } | |||
2161 | ||||
2162 | void CodeGenModule::EmitGlobalAnnotations() { | |||
2163 | if (Annotations.empty()) | |||
2164 | return; | |||
2165 | ||||
2166 | // Create a new global variable for the ConstantStruct in the Module. | |||
2167 | llvm::Constant *Array = llvm::ConstantArray::get(llvm::ArrayType::get( | |||
2168 | Annotations[0]->getType(), Annotations.size()), Annotations); | |||
2169 | auto *gv = new llvm::GlobalVariable(getModule(), Array->getType(), false, | |||
2170 | llvm::GlobalValue::AppendingLinkage, | |||
2171 | Array, "llvm.global.annotations"); | |||
2172 | gv->setSection(AnnotationSection); | |||
2173 | } | |||
2174 | ||||
2175 | llvm::Constant *CodeGenModule::EmitAnnotationString(StringRef Str) { | |||
2176 | llvm::Constant *&AStr = AnnotationStrings[Str]; | |||
2177 | if (AStr) | |||
2178 | return AStr; | |||
2179 | ||||
2180 | // Not found yet, create a new global. | |||
2181 | llvm::Constant *s = llvm::ConstantDataArray::getString(getLLVMContext(), Str); | |||
2182 | auto *gv = | |||
2183 | new llvm::GlobalVariable(getModule(), s->getType(), true, | |||
2184 | llvm::GlobalValue::PrivateLinkage, s, ".str"); | |||
2185 | gv->setSection(AnnotationSection); | |||
2186 | gv->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
2187 | AStr = gv; | |||
2188 | return gv; | |||
2189 | } | |||
2190 | ||||
2191 | llvm::Constant *CodeGenModule::EmitAnnotationUnit(SourceLocation Loc) { | |||
2192 | SourceManager &SM = getContext().getSourceManager(); | |||
2193 | PresumedLoc PLoc = SM.getPresumedLoc(Loc); | |||
2194 | if (PLoc.isValid()) | |||
2195 | return EmitAnnotationString(PLoc.getFilename()); | |||
2196 | return EmitAnnotationString(SM.getBufferName(Loc)); | |||
2197 | } | |||
2198 | ||||
2199 | llvm::Constant *CodeGenModule::EmitAnnotationLineNo(SourceLocation L) { | |||
2200 | SourceManager &SM = getContext().getSourceManager(); | |||
2201 | PresumedLoc PLoc = SM.getPresumedLoc(L); | |||
2202 | unsigned LineNo = PLoc.isValid() ? PLoc.getLine() : | |||
2203 | SM.getExpansionLineNumber(L); | |||
2204 | return llvm::ConstantInt::get(Int32Ty, LineNo); | |||
2205 | } | |||
2206 | ||||
2207 | llvm::Constant *CodeGenModule::EmitAnnotateAttr(llvm::GlobalValue *GV, | |||
2208 | const AnnotateAttr *AA, | |||
2209 | SourceLocation L) { | |||
2210 | // Get the globals for file name, annotation, and the line number. | |||
2211 | llvm::Constant *AnnoGV = EmitAnnotationString(AA->getAnnotation()), | |||
2212 | *UnitGV = EmitAnnotationUnit(L), | |||
2213 | *LineNoCst = EmitAnnotationLineNo(L); | |||
2214 | ||||
2215 | // Create the ConstantStruct for the global annotation. | |||
2216 | llvm::Constant *Fields[4] = { | |||
2217 | llvm::ConstantExpr::getBitCast(GV, Int8PtrTy), | |||
2218 | llvm::ConstantExpr::getBitCast(AnnoGV, Int8PtrTy), | |||
2219 | llvm::ConstantExpr::getBitCast(UnitGV, Int8PtrTy), | |||
2220 | LineNoCst | |||
2221 | }; | |||
2222 | return llvm::ConstantStruct::getAnon(Fields); | |||
2223 | } | |||
2224 | ||||
2225 | void CodeGenModule::AddGlobalAnnotations(const ValueDecl *D, | |||
2226 | llvm::GlobalValue *GV) { | |||
2227 | assert(D->hasAttr<AnnotateAttr>() && "no annotate attribute")((D->hasAttr<AnnotateAttr>() && "no annotate attribute" ) ? static_cast<void> (0) : __assert_fail ("D->hasAttr<AnnotateAttr>() && \"no annotate attribute\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2227, __PRETTY_FUNCTION__)); | |||
2228 | // Get the struct elements for these annotations. | |||
2229 | for (const auto *I : D->specific_attrs<AnnotateAttr>()) | |||
2230 | Annotations.push_back(EmitAnnotateAttr(GV, I, D->getLocation())); | |||
2231 | } | |||
2232 | ||||
2233 | bool CodeGenModule::isInSanitizerBlacklist(SanitizerMask Kind, | |||
2234 | llvm::Function *Fn, | |||
2235 | SourceLocation Loc) const { | |||
2236 | const auto &SanitizerBL = getContext().getSanitizerBlacklist(); | |||
2237 | // Blacklist by function name. | |||
2238 | if (SanitizerBL.isBlacklistedFunction(Kind, Fn->getName())) | |||
2239 | return true; | |||
2240 | // Blacklist by location. | |||
2241 | if (Loc.isValid()) | |||
2242 | return SanitizerBL.isBlacklistedLocation(Kind, Loc); | |||
2243 | // If location is unknown, this may be a compiler-generated function. Assume | |||
2244 | // it's located in the main file. | |||
2245 | auto &SM = Context.getSourceManager(); | |||
2246 | if (const auto *MainFile = SM.getFileEntryForID(SM.getMainFileID())) { | |||
2247 | return SanitizerBL.isBlacklistedFile(Kind, MainFile->getName()); | |||
2248 | } | |||
2249 | return false; | |||
2250 | } | |||
2251 | ||||
2252 | bool CodeGenModule::isInSanitizerBlacklist(llvm::GlobalVariable *GV, | |||
2253 | SourceLocation Loc, QualType Ty, | |||
2254 | StringRef Category) const { | |||
2255 | // For now globals can be blacklisted only in ASan and KASan. | |||
2256 | const SanitizerMask EnabledAsanMask = | |||
2257 | LangOpts.Sanitize.Mask & | |||
2258 | (SanitizerKind::Address | SanitizerKind::KernelAddress | | |||
2259 | SanitizerKind::HWAddress | SanitizerKind::KernelHWAddress | | |||
2260 | SanitizerKind::MemTag); | |||
2261 | if (!EnabledAsanMask) | |||
2262 | return false; | |||
2263 | const auto &SanitizerBL = getContext().getSanitizerBlacklist(); | |||
2264 | if (SanitizerBL.isBlacklistedGlobal(EnabledAsanMask, GV->getName(), Category)) | |||
2265 | return true; | |||
2266 | if (SanitizerBL.isBlacklistedLocation(EnabledAsanMask, Loc, Category)) | |||
2267 | return true; | |||
2268 | // Check global type. | |||
2269 | if (!Ty.isNull()) { | |||
2270 | // Drill down the array types: if global variable of a fixed type is | |||
2271 | // blacklisted, we also don't instrument arrays of them. | |||
2272 | while (auto AT = dyn_cast<ArrayType>(Ty.getTypePtr())) | |||
2273 | Ty = AT->getElementType(); | |||
2274 | Ty = Ty.getCanonicalType().getUnqualifiedType(); | |||
2275 | // We allow to blacklist only record types (classes, structs etc.) | |||
2276 | if (Ty->isRecordType()) { | |||
2277 | std::string TypeStr = Ty.getAsString(getContext().getPrintingPolicy()); | |||
2278 | if (SanitizerBL.isBlacklistedType(EnabledAsanMask, TypeStr, Category)) | |||
2279 | return true; | |||
2280 | } | |||
2281 | } | |||
2282 | return false; | |||
2283 | } | |||
2284 | ||||
2285 | bool CodeGenModule::imbueXRayAttrs(llvm::Function *Fn, SourceLocation Loc, | |||
2286 | StringRef Category) const { | |||
2287 | const auto &XRayFilter = getContext().getXRayFilter(); | |||
2288 | using ImbueAttr = XRayFunctionFilter::ImbueAttribute; | |||
2289 | auto Attr = ImbueAttr::NONE; | |||
2290 | if (Loc.isValid()) | |||
2291 | Attr = XRayFilter.shouldImbueLocation(Loc, Category); | |||
2292 | if (Attr == ImbueAttr::NONE) | |||
2293 | Attr = XRayFilter.shouldImbueFunction(Fn->getName()); | |||
2294 | switch (Attr) { | |||
2295 | case ImbueAttr::NONE: | |||
2296 | return false; | |||
2297 | case ImbueAttr::ALWAYS: | |||
2298 | Fn->addFnAttr("function-instrument", "xray-always"); | |||
2299 | break; | |||
2300 | case ImbueAttr::ALWAYS_ARG1: | |||
2301 | Fn->addFnAttr("function-instrument", "xray-always"); | |||
2302 | Fn->addFnAttr("xray-log-args", "1"); | |||
2303 | break; | |||
2304 | case ImbueAttr::NEVER: | |||
2305 | Fn->addFnAttr("function-instrument", "xray-never"); | |||
2306 | break; | |||
2307 | } | |||
2308 | return true; | |||
2309 | } | |||
2310 | ||||
2311 | bool CodeGenModule::MustBeEmitted(const ValueDecl *Global) { | |||
2312 | // Never defer when EmitAllDecls is specified. | |||
2313 | if (LangOpts.EmitAllDecls) | |||
2314 | return true; | |||
2315 | ||||
2316 | if (CodeGenOpts.KeepStaticConsts) { | |||
2317 | const auto *VD = dyn_cast<VarDecl>(Global); | |||
2318 | if (VD && VD->getType().isConstQualified() && | |||
2319 | VD->getStorageDuration() == SD_Static) | |||
2320 | return true; | |||
2321 | } | |||
2322 | ||||
2323 | return getContext().DeclMustBeEmitted(Global); | |||
2324 | } | |||
2325 | ||||
2326 | bool CodeGenModule::MayBeEmittedEagerly(const ValueDecl *Global) { | |||
2327 | if (const auto *FD = dyn_cast<FunctionDecl>(Global)) { | |||
2328 | if (FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) | |||
2329 | // Implicit template instantiations may change linkage if they are later | |||
2330 | // explicitly instantiated, so they should not be emitted eagerly. | |||
2331 | return false; | |||
2332 | // In OpenMP 5.0 function may be marked as device_type(nohost) and we should | |||
2333 | // not emit them eagerly unless we sure that the function must be emitted on | |||
2334 | // the host. | |||
2335 | if (LangOpts.OpenMP >= 50 && !LangOpts.OpenMPSimd && | |||
2336 | !LangOpts.OpenMPIsDevice && | |||
2337 | !OMPDeclareTargetDeclAttr::getDeviceType(FD) && | |||
2338 | !FD->isUsed(/*CheckUsedAttr=*/false) && !FD->isReferenced()) | |||
2339 | return false; | |||
2340 | } | |||
2341 | if (const auto *VD = dyn_cast<VarDecl>(Global)) | |||
2342 | if (Context.getInlineVariableDefinitionKind(VD) == | |||
2343 | ASTContext::InlineVariableDefinitionKind::WeakUnknown) | |||
2344 | // A definition of an inline constexpr static data member may change | |||
2345 | // linkage later if it's redeclared outside the class. | |||
2346 | return false; | |||
2347 | // If OpenMP is enabled and threadprivates must be generated like TLS, delay | |||
2348 | // codegen for global variables, because they may be marked as threadprivate. | |||
2349 | if (LangOpts.OpenMP && LangOpts.OpenMPUseTLS && | |||
2350 | getContext().getTargetInfo().isTLSSupported() && isa<VarDecl>(Global) && | |||
2351 | !isTypeConstant(Global->getType(), false) && | |||
2352 | !OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(Global)) | |||
2353 | return false; | |||
2354 | ||||
2355 | return true; | |||
2356 | } | |||
2357 | ||||
2358 | ConstantAddress CodeGenModule::GetAddrOfUuidDescriptor( | |||
2359 | const CXXUuidofExpr* E) { | |||
2360 | // Sema has verified that IIDSource has a __declspec(uuid()), and that its | |||
2361 | // well-formed. | |||
2362 | StringRef Uuid = E->getUuidStr(); | |||
2363 | std::string Name = "_GUID_" + Uuid.lower(); | |||
2364 | std::replace(Name.begin(), Name.end(), '-', '_'); | |||
2365 | ||||
2366 | // The UUID descriptor should be pointer aligned. | |||
2367 | CharUnits Alignment = CharUnits::fromQuantity(PointerAlignInBytes); | |||
2368 | ||||
2369 | // Look for an existing global. | |||
2370 | if (llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name)) | |||
2371 | return ConstantAddress(GV, Alignment); | |||
2372 | ||||
2373 | llvm::Constant *Init = EmitUuidofInitializer(Uuid); | |||
2374 | assert(Init && "failed to initialize as constant")((Init && "failed to initialize as constant") ? static_cast <void> (0) : __assert_fail ("Init && \"failed to initialize as constant\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2374, __PRETTY_FUNCTION__)); | |||
2375 | ||||
2376 | auto *GV = new llvm::GlobalVariable( | |||
2377 | getModule(), Init->getType(), | |||
2378 | /*isConstant=*/true, llvm::GlobalValue::LinkOnceODRLinkage, Init, Name); | |||
2379 | if (supportsCOMDAT()) | |||
2380 | GV->setComdat(TheModule.getOrInsertComdat(GV->getName())); | |||
2381 | setDSOLocal(GV); | |||
2382 | return ConstantAddress(GV, Alignment); | |||
2383 | } | |||
2384 | ||||
2385 | ConstantAddress CodeGenModule::GetWeakRefReference(const ValueDecl *VD) { | |||
2386 | const AliasAttr *AA = VD->getAttr<AliasAttr>(); | |||
2387 | assert(AA && "No alias?")((AA && "No alias?") ? static_cast<void> (0) : __assert_fail ("AA && \"No alias?\"", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2387, __PRETTY_FUNCTION__)); | |||
2388 | ||||
2389 | CharUnits Alignment = getContext().getDeclAlign(VD); | |||
2390 | llvm::Type *DeclTy = getTypes().ConvertTypeForMem(VD->getType()); | |||
2391 | ||||
2392 | // See if there is already something with the target's name in the module. | |||
2393 | llvm::GlobalValue *Entry = GetGlobalValue(AA->getAliasee()); | |||
2394 | if (Entry) { | |||
2395 | unsigned AS = getContext().getTargetAddressSpace(VD->getType()); | |||
2396 | auto Ptr = llvm::ConstantExpr::getBitCast(Entry, DeclTy->getPointerTo(AS)); | |||
2397 | return ConstantAddress(Ptr, Alignment); | |||
2398 | } | |||
2399 | ||||
2400 | llvm::Constant *Aliasee; | |||
2401 | if (isa<llvm::FunctionType>(DeclTy)) | |||
2402 | Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, | |||
2403 | GlobalDecl(cast<FunctionDecl>(VD)), | |||
2404 | /*ForVTable=*/false); | |||
2405 | else | |||
2406 | Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), | |||
2407 | llvm::PointerType::getUnqual(DeclTy), | |||
2408 | nullptr); | |||
2409 | ||||
2410 | auto *F = cast<llvm::GlobalValue>(Aliasee); | |||
2411 | F->setLinkage(llvm::Function::ExternalWeakLinkage); | |||
2412 | WeakRefReferences.insert(F); | |||
2413 | ||||
2414 | return ConstantAddress(Aliasee, Alignment); | |||
2415 | } | |||
2416 | ||||
2417 | void CodeGenModule::EmitGlobal(GlobalDecl GD) { | |||
2418 | const auto *Global = cast<ValueDecl>(GD.getDecl()); | |||
2419 | ||||
2420 | // Weak references don't produce any output by themselves. | |||
2421 | if (Global->hasAttr<WeakRefAttr>()) | |||
2422 | return; | |||
2423 | ||||
2424 | // If this is an alias definition (which otherwise looks like a declaration) | |||
2425 | // emit it now. | |||
2426 | if (Global->hasAttr<AliasAttr>()) | |||
2427 | return EmitAliasDefinition(GD); | |||
2428 | ||||
2429 | // IFunc like an alias whose value is resolved at runtime by calling resolver. | |||
2430 | if (Global->hasAttr<IFuncAttr>()) | |||
2431 | return emitIFuncDefinition(GD); | |||
2432 | ||||
2433 | // If this is a cpu_dispatch multiversion function, emit the resolver. | |||
2434 | if (Global->hasAttr<CPUDispatchAttr>()) | |||
2435 | return emitCPUDispatchDefinition(GD); | |||
2436 | ||||
2437 | // If this is CUDA, be selective about which declarations we emit. | |||
2438 | if (LangOpts.CUDA) { | |||
2439 | if (LangOpts.CUDAIsDevice) { | |||
2440 | if (!Global->hasAttr<CUDADeviceAttr>() && | |||
2441 | !Global->hasAttr<CUDAGlobalAttr>() && | |||
2442 | !Global->hasAttr<CUDAConstantAttr>() && | |||
2443 | !Global->hasAttr<CUDASharedAttr>() && | |||
2444 | !(LangOpts.HIP && Global->hasAttr<HIPPinnedShadowAttr>())) | |||
2445 | return; | |||
2446 | } else { | |||
2447 | // We need to emit host-side 'shadows' for all global | |||
2448 | // device-side variables because the CUDA runtime needs their | |||
2449 | // size and host-side address in order to provide access to | |||
2450 | // their device-side incarnations. | |||
2451 | ||||
2452 | // So device-only functions are the only things we skip. | |||
2453 | if (isa<FunctionDecl>(Global) && !Global->hasAttr<CUDAHostAttr>() && | |||
2454 | Global->hasAttr<CUDADeviceAttr>()) | |||
2455 | return; | |||
2456 | ||||
2457 | assert((isa<FunctionDecl>(Global) || isa<VarDecl>(Global)) &&(((isa<FunctionDecl>(Global) || isa<VarDecl>(Global )) && "Expected Variable or Function") ? static_cast< void> (0) : __assert_fail ("(isa<FunctionDecl>(Global) || isa<VarDecl>(Global)) && \"Expected Variable or Function\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2458, __PRETTY_FUNCTION__)) | |||
2458 | "Expected Variable or Function")(((isa<FunctionDecl>(Global) || isa<VarDecl>(Global )) && "Expected Variable or Function") ? static_cast< void> (0) : __assert_fail ("(isa<FunctionDecl>(Global) || isa<VarDecl>(Global)) && \"Expected Variable or Function\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2458, __PRETTY_FUNCTION__)); | |||
2459 | } | |||
2460 | } | |||
2461 | ||||
2462 | if (LangOpts.OpenMP) { | |||
2463 | // If this is OpenMP, check if it is legal to emit this global normally. | |||
2464 | if (OpenMPRuntime && OpenMPRuntime->emitTargetGlobal(GD)) | |||
2465 | return; | |||
2466 | if (auto *DRD = dyn_cast<OMPDeclareReductionDecl>(Global)) { | |||
2467 | if (MustBeEmitted(Global)) | |||
2468 | EmitOMPDeclareReduction(DRD); | |||
2469 | return; | |||
2470 | } else if (auto *DMD = dyn_cast<OMPDeclareMapperDecl>(Global)) { | |||
2471 | if (MustBeEmitted(Global)) | |||
2472 | EmitOMPDeclareMapper(DMD); | |||
2473 | return; | |||
2474 | } | |||
2475 | } | |||
2476 | ||||
2477 | // Ignore declarations, they will be emitted on their first use. | |||
2478 | if (const auto *FD = dyn_cast<FunctionDecl>(Global)) { | |||
2479 | // Forward declarations are emitted lazily on first use. | |||
2480 | if (!FD->doesThisDeclarationHaveABody()) { | |||
2481 | if (!FD->doesDeclarationForceExternallyVisibleDefinition()) | |||
2482 | return; | |||
2483 | ||||
2484 | StringRef MangledName = getMangledName(GD); | |||
2485 | ||||
2486 | // Compute the function info and LLVM type. | |||
2487 | const CGFunctionInfo &FI = getTypes().arrangeGlobalDeclaration(GD); | |||
2488 | llvm::Type *Ty = getTypes().GetFunctionType(FI); | |||
2489 | ||||
2490 | GetOrCreateLLVMFunction(MangledName, Ty, GD, /*ForVTable=*/false, | |||
2491 | /*DontDefer=*/false); | |||
2492 | return; | |||
2493 | } | |||
2494 | } else { | |||
2495 | const auto *VD = cast<VarDecl>(Global); | |||
2496 | assert(VD->isFileVarDecl() && "Cannot emit local var decl as global.")((VD->isFileVarDecl() && "Cannot emit local var decl as global." ) ? static_cast<void> (0) : __assert_fail ("VD->isFileVarDecl() && \"Cannot emit local var decl as global.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2496, __PRETTY_FUNCTION__)); | |||
2497 | if (VD->isThisDeclarationADefinition() != VarDecl::Definition && | |||
2498 | !Context.isMSStaticDataMemberInlineDefinition(VD)) { | |||
2499 | if (LangOpts.OpenMP) { | |||
2500 | // Emit declaration of the must-be-emitted declare target variable. | |||
2501 | if (llvm::Optional<OMPDeclareTargetDeclAttr::MapTypeTy> Res = | |||
2502 | OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(VD)) { | |||
2503 | bool UnifiedMemoryEnabled = | |||
2504 | getOpenMPRuntime().hasRequiresUnifiedSharedMemory(); | |||
2505 | if (*Res == OMPDeclareTargetDeclAttr::MT_To && | |||
2506 | !UnifiedMemoryEnabled) { | |||
2507 | (void)GetAddrOfGlobalVar(VD); | |||
2508 | } else { | |||
2509 | assert(((*Res == OMPDeclareTargetDeclAttr::MT_Link) ||((((*Res == OMPDeclareTargetDeclAttr::MT_Link) || (*Res == OMPDeclareTargetDeclAttr ::MT_To && UnifiedMemoryEnabled)) && "Link clause or to clause with unified memory expected." ) ? static_cast<void> (0) : __assert_fail ("((*Res == OMPDeclareTargetDeclAttr::MT_Link) || (*Res == OMPDeclareTargetDeclAttr::MT_To && UnifiedMemoryEnabled)) && \"Link clause or to clause with unified memory expected.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2512, __PRETTY_FUNCTION__)) | |||
2510 | (*Res == OMPDeclareTargetDeclAttr::MT_To &&((((*Res == OMPDeclareTargetDeclAttr::MT_Link) || (*Res == OMPDeclareTargetDeclAttr ::MT_To && UnifiedMemoryEnabled)) && "Link clause or to clause with unified memory expected." ) ? static_cast<void> (0) : __assert_fail ("((*Res == OMPDeclareTargetDeclAttr::MT_Link) || (*Res == OMPDeclareTargetDeclAttr::MT_To && UnifiedMemoryEnabled)) && \"Link clause or to clause with unified memory expected.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2512, __PRETTY_FUNCTION__)) | |||
2511 | UnifiedMemoryEnabled)) &&((((*Res == OMPDeclareTargetDeclAttr::MT_Link) || (*Res == OMPDeclareTargetDeclAttr ::MT_To && UnifiedMemoryEnabled)) && "Link clause or to clause with unified memory expected." ) ? static_cast<void> (0) : __assert_fail ("((*Res == OMPDeclareTargetDeclAttr::MT_Link) || (*Res == OMPDeclareTargetDeclAttr::MT_To && UnifiedMemoryEnabled)) && \"Link clause or to clause with unified memory expected.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2512, __PRETTY_FUNCTION__)) | |||
2512 | "Link clause or to clause with unified memory expected.")((((*Res == OMPDeclareTargetDeclAttr::MT_Link) || (*Res == OMPDeclareTargetDeclAttr ::MT_To && UnifiedMemoryEnabled)) && "Link clause or to clause with unified memory expected." ) ? static_cast<void> (0) : __assert_fail ("((*Res == OMPDeclareTargetDeclAttr::MT_Link) || (*Res == OMPDeclareTargetDeclAttr::MT_To && UnifiedMemoryEnabled)) && \"Link clause or to clause with unified memory expected.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2512, __PRETTY_FUNCTION__)); | |||
2513 | (void)getOpenMPRuntime().getAddrOfDeclareTargetVar(VD); | |||
2514 | } | |||
2515 | ||||
2516 | return; | |||
2517 | } | |||
2518 | } | |||
2519 | // If this declaration may have caused an inline variable definition to | |||
2520 | // change linkage, make sure that it's emitted. | |||
2521 | if (Context.getInlineVariableDefinitionKind(VD) == | |||
2522 | ASTContext::InlineVariableDefinitionKind::Strong) | |||
2523 | GetAddrOfGlobalVar(VD); | |||
2524 | return; | |||
2525 | } | |||
2526 | } | |||
2527 | ||||
2528 | // Defer code generation to first use when possible, e.g. if this is an inline | |||
2529 | // function. If the global must always be emitted, do it eagerly if possible | |||
2530 | // to benefit from cache locality. | |||
2531 | if (MustBeEmitted(Global) && MayBeEmittedEagerly(Global)) { | |||
2532 | // Emit the definition if it can't be deferred. | |||
2533 | EmitGlobalDefinition(GD); | |||
2534 | return; | |||
2535 | } | |||
2536 | ||||
2537 | // Check if this must be emitted as declare variant. | |||
2538 | if (LangOpts.OpenMP && isa<FunctionDecl>(Global) && OpenMPRuntime && | |||
2539 | OpenMPRuntime->emitDeclareVariant(GD, /*IsForDefinition=*/false)) | |||
2540 | return; | |||
2541 | ||||
2542 | // If we're deferring emission of a C++ variable with an | |||
2543 | // initializer, remember the order in which it appeared in the file. | |||
2544 | if (getLangOpts().CPlusPlus && isa<VarDecl>(Global) && | |||
2545 | cast<VarDecl>(Global)->hasInit()) { | |||
2546 | DelayedCXXInitPosition[Global] = CXXGlobalInits.size(); | |||
2547 | CXXGlobalInits.push_back(nullptr); | |||
2548 | } | |||
2549 | ||||
2550 | StringRef MangledName = getMangledName(GD); | |||
2551 | if (GetGlobalValue(MangledName) != nullptr) { | |||
2552 | // The value has already been used and should therefore be emitted. | |||
2553 | addDeferredDeclToEmit(GD); | |||
2554 | } else if (MustBeEmitted(Global)) { | |||
2555 | // The value must be emitted, but cannot be emitted eagerly. | |||
2556 | assert(!MayBeEmittedEagerly(Global))((!MayBeEmittedEagerly(Global)) ? static_cast<void> (0) : __assert_fail ("!MayBeEmittedEagerly(Global)", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2556, __PRETTY_FUNCTION__)); | |||
2557 | addDeferredDeclToEmit(GD); | |||
2558 | } else { | |||
2559 | // Otherwise, remember that we saw a deferred decl with this name. The | |||
2560 | // first use of the mangled name will cause it to move into | |||
2561 | // DeferredDeclsToEmit. | |||
2562 | DeferredDecls[MangledName] = GD; | |||
2563 | } | |||
2564 | } | |||
2565 | ||||
2566 | // Check if T is a class type with a destructor that's not dllimport. | |||
2567 | static bool HasNonDllImportDtor(QualType T) { | |||
2568 | if (const auto *RT = T->getBaseElementTypeUnsafe()->getAs<RecordType>()) | |||
2569 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) | |||
2570 | if (RD->getDestructor() && !RD->getDestructor()->hasAttr<DLLImportAttr>()) | |||
2571 | return true; | |||
2572 | ||||
2573 | return false; | |||
2574 | } | |||
2575 | ||||
2576 | namespace { | |||
2577 | struct FunctionIsDirectlyRecursive | |||
2578 | : public ConstStmtVisitor<FunctionIsDirectlyRecursive, bool> { | |||
2579 | const StringRef Name; | |||
2580 | const Builtin::Context &BI; | |||
2581 | FunctionIsDirectlyRecursive(StringRef N, const Builtin::Context &C) | |||
2582 | : Name(N), BI(C) {} | |||
2583 | ||||
2584 | bool VisitCallExpr(const CallExpr *E) { | |||
2585 | const FunctionDecl *FD = E->getDirectCallee(); | |||
2586 | if (!FD) | |||
2587 | return false; | |||
2588 | AsmLabelAttr *Attr = FD->getAttr<AsmLabelAttr>(); | |||
2589 | if (Attr && Name == Attr->getLabel()) | |||
2590 | return true; | |||
2591 | unsigned BuiltinID = FD->getBuiltinID(); | |||
2592 | if (!BuiltinID || !BI.isLibFunction(BuiltinID)) | |||
2593 | return false; | |||
2594 | StringRef BuiltinName = BI.getName(BuiltinID); | |||
2595 | if (BuiltinName.startswith("__builtin_") && | |||
2596 | Name == BuiltinName.slice(strlen("__builtin_"), StringRef::npos)) { | |||
2597 | return true; | |||
2598 | } | |||
2599 | return false; | |||
2600 | } | |||
2601 | ||||
2602 | bool VisitStmt(const Stmt *S) { | |||
2603 | for (const Stmt *Child : S->children()) | |||
2604 | if (Child && this->Visit(Child)) | |||
2605 | return true; | |||
2606 | return false; | |||
2607 | } | |||
2608 | }; | |||
2609 | ||||
2610 | // Make sure we're not referencing non-imported vars or functions. | |||
2611 | struct DLLImportFunctionVisitor | |||
2612 | : public RecursiveASTVisitor<DLLImportFunctionVisitor> { | |||
2613 | bool SafeToInline = true; | |||
2614 | ||||
2615 | bool shouldVisitImplicitCode() const { return true; } | |||
2616 | ||||
2617 | bool VisitVarDecl(VarDecl *VD) { | |||
2618 | if (VD->getTLSKind()) { | |||
2619 | // A thread-local variable cannot be imported. | |||
2620 | SafeToInline = false; | |||
2621 | return SafeToInline; | |||
2622 | } | |||
2623 | ||||
2624 | // A variable definition might imply a destructor call. | |||
2625 | if (VD->isThisDeclarationADefinition()) | |||
2626 | SafeToInline = !HasNonDllImportDtor(VD->getType()); | |||
2627 | ||||
2628 | return SafeToInline; | |||
2629 | } | |||
2630 | ||||
2631 | bool VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) { | |||
2632 | if (const auto *D = E->getTemporary()->getDestructor()) | |||
2633 | SafeToInline = D->hasAttr<DLLImportAttr>(); | |||
2634 | return SafeToInline; | |||
2635 | } | |||
2636 | ||||
2637 | bool VisitDeclRefExpr(DeclRefExpr *E) { | |||
2638 | ValueDecl *VD = E->getDecl(); | |||
2639 | if (isa<FunctionDecl>(VD)) | |||
2640 | SafeToInline = VD->hasAttr<DLLImportAttr>(); | |||
2641 | else if (VarDecl *V = dyn_cast<VarDecl>(VD)) | |||
2642 | SafeToInline = !V->hasGlobalStorage() || V->hasAttr<DLLImportAttr>(); | |||
2643 | return SafeToInline; | |||
2644 | } | |||
2645 | ||||
2646 | bool VisitCXXConstructExpr(CXXConstructExpr *E) { | |||
2647 | SafeToInline = E->getConstructor()->hasAttr<DLLImportAttr>(); | |||
2648 | return SafeToInline; | |||
2649 | } | |||
2650 | ||||
2651 | bool VisitCXXMemberCallExpr(CXXMemberCallExpr *E) { | |||
2652 | CXXMethodDecl *M = E->getMethodDecl(); | |||
2653 | if (!M) { | |||
2654 | // Call through a pointer to member function. This is safe to inline. | |||
2655 | SafeToInline = true; | |||
2656 | } else { | |||
2657 | SafeToInline = M->hasAttr<DLLImportAttr>(); | |||
2658 | } | |||
2659 | return SafeToInline; | |||
2660 | } | |||
2661 | ||||
2662 | bool VisitCXXDeleteExpr(CXXDeleteExpr *E) { | |||
2663 | SafeToInline = E->getOperatorDelete()->hasAttr<DLLImportAttr>(); | |||
2664 | return SafeToInline; | |||
2665 | } | |||
2666 | ||||
2667 | bool VisitCXXNewExpr(CXXNewExpr *E) { | |||
2668 | SafeToInline = E->getOperatorNew()->hasAttr<DLLImportAttr>(); | |||
2669 | return SafeToInline; | |||
2670 | } | |||
2671 | }; | |||
2672 | } | |||
2673 | ||||
2674 | // isTriviallyRecursive - Check if this function calls another | |||
2675 | // decl that, because of the asm attribute or the other decl being a builtin, | |||
2676 | // ends up pointing to itself. | |||
2677 | bool | |||
2678 | CodeGenModule::isTriviallyRecursive(const FunctionDecl *FD) { | |||
2679 | StringRef Name; | |||
2680 | if (getCXXABI().getMangleContext().shouldMangleDeclName(FD)) { | |||
2681 | // asm labels are a special kind of mangling we have to support. | |||
2682 | AsmLabelAttr *Attr = FD->getAttr<AsmLabelAttr>(); | |||
2683 | if (!Attr) | |||
2684 | return false; | |||
2685 | Name = Attr->getLabel(); | |||
2686 | } else { | |||
2687 | Name = FD->getName(); | |||
2688 | } | |||
2689 | ||||
2690 | FunctionIsDirectlyRecursive Walker(Name, Context.BuiltinInfo); | |||
2691 | const Stmt *Body = FD->getBody(); | |||
2692 | return Body ? Walker.Visit(Body) : false; | |||
2693 | } | |||
2694 | ||||
2695 | bool CodeGenModule::shouldEmitFunction(GlobalDecl GD) { | |||
2696 | if (getFunctionLinkage(GD) != llvm::Function::AvailableExternallyLinkage) | |||
2697 | return true; | |||
2698 | const auto *F = cast<FunctionDecl>(GD.getDecl()); | |||
2699 | if (CodeGenOpts.OptimizationLevel == 0 && !F->hasAttr<AlwaysInlineAttr>()) | |||
2700 | return false; | |||
2701 | ||||
2702 | if (F->hasAttr<DLLImportAttr>()) { | |||
2703 | // Check whether it would be safe to inline this dllimport function. | |||
2704 | DLLImportFunctionVisitor Visitor; | |||
2705 | Visitor.TraverseFunctionDecl(const_cast<FunctionDecl*>(F)); | |||
2706 | if (!Visitor.SafeToInline) | |||
2707 | return false; | |||
2708 | ||||
2709 | if (const CXXDestructorDecl *Dtor = dyn_cast<CXXDestructorDecl>(F)) { | |||
2710 | // Implicit destructor invocations aren't captured in the AST, so the | |||
2711 | // check above can't see them. Check for them manually here. | |||
2712 | for (const Decl *Member : Dtor->getParent()->decls()) | |||
2713 | if (isa<FieldDecl>(Member)) | |||
2714 | if (HasNonDllImportDtor(cast<FieldDecl>(Member)->getType())) | |||
2715 | return false; | |||
2716 | for (const CXXBaseSpecifier &B : Dtor->getParent()->bases()) | |||
2717 | if (HasNonDllImportDtor(B.getType())) | |||
2718 | return false; | |||
2719 | } | |||
2720 | } | |||
2721 | ||||
2722 | // PR9614. Avoid cases where the source code is lying to us. An available | |||
2723 | // externally function should have an equivalent function somewhere else, | |||
2724 | // but a function that calls itself is clearly not equivalent to the real | |||
2725 | // implementation. | |||
2726 | // This happens in glibc's btowc and in some configure checks. | |||
2727 | return !isTriviallyRecursive(F); | |||
2728 | } | |||
2729 | ||||
2730 | bool CodeGenModule::shouldOpportunisticallyEmitVTables() { | |||
2731 | return CodeGenOpts.OptimizationLevel > 0; | |||
2732 | } | |||
2733 | ||||
2734 | void CodeGenModule::EmitMultiVersionFunctionDefinition(GlobalDecl GD, | |||
2735 | llvm::GlobalValue *GV) { | |||
2736 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
2737 | ||||
2738 | if (FD->isCPUSpecificMultiVersion()) { | |||
2739 | auto *Spec = FD->getAttr<CPUSpecificAttr>(); | |||
2740 | for (unsigned I = 0; I < Spec->cpus_size(); ++I) | |||
2741 | EmitGlobalFunctionDefinition(GD.getWithMultiVersionIndex(I), nullptr); | |||
2742 | // Requires multiple emits. | |||
2743 | } else | |||
2744 | EmitGlobalFunctionDefinition(GD, GV); | |||
2745 | } | |||
2746 | ||||
2747 | void CodeGenModule::emitOpenMPDeviceFunctionRedefinition( | |||
2748 | GlobalDecl OldGD, GlobalDecl NewGD, llvm::GlobalValue *GV) { | |||
2749 | assert(getLangOpts().OpenMP && getLangOpts().OpenMPIsDevice &&((getLangOpts().OpenMP && getLangOpts().OpenMPIsDevice && OpenMPRuntime && "Expected OpenMP device mode." ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().OpenMP && getLangOpts().OpenMPIsDevice && OpenMPRuntime && \"Expected OpenMP device mode.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2750, __PRETTY_FUNCTION__)) | |||
2750 | OpenMPRuntime && "Expected OpenMP device mode.")((getLangOpts().OpenMP && getLangOpts().OpenMPIsDevice && OpenMPRuntime && "Expected OpenMP device mode." ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().OpenMP && getLangOpts().OpenMPIsDevice && OpenMPRuntime && \"Expected OpenMP device mode.\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2750, __PRETTY_FUNCTION__)); | |||
2751 | const auto *D = cast<FunctionDecl>(OldGD.getDecl()); | |||
2752 | ||||
2753 | // Compute the function info and LLVM type. | |||
2754 | const CGFunctionInfo &FI = getTypes().arrangeGlobalDeclaration(OldGD); | |||
2755 | llvm::FunctionType *Ty = getTypes().GetFunctionType(FI); | |||
2756 | ||||
2757 | // Get or create the prototype for the function. | |||
2758 | if (!GV || (GV->getType()->getElementType() != Ty)) { | |||
2759 | GV = cast<llvm::GlobalValue>(GetOrCreateLLVMFunction( | |||
2760 | getMangledName(OldGD), Ty, GlobalDecl(), /*ForVTable=*/false, | |||
2761 | /*DontDefer=*/true, /*IsThunk=*/false, llvm::AttributeList(), | |||
2762 | ForDefinition)); | |||
2763 | SetFunctionAttributes(OldGD, cast<llvm::Function>(GV), | |||
2764 | /*IsIncompleteFunction=*/false, | |||
2765 | /*IsThunk=*/false); | |||
2766 | } | |||
2767 | // We need to set linkage and visibility on the function before | |||
2768 | // generating code for it because various parts of IR generation | |||
2769 | // want to propagate this information down (e.g. to local static | |||
2770 | // declarations). | |||
2771 | auto *Fn = cast<llvm::Function>(GV); | |||
2772 | setFunctionLinkage(OldGD, Fn); | |||
2773 | ||||
2774 | // FIXME: this is redundant with part of | |||
2775 | // setFunctionDefinitionAttributes | |||
2776 | setGVProperties(Fn, OldGD); | |||
2777 | ||||
2778 | MaybeHandleStaticInExternC(D, Fn); | |||
2779 | ||||
2780 | maybeSetTrivialComdat(*D, *Fn); | |||
2781 | ||||
2782 | CodeGenFunction(*this).GenerateCode(NewGD, Fn, FI); | |||
2783 | ||||
2784 | setNonAliasAttributes(OldGD, Fn); | |||
2785 | SetLLVMFunctionAttributesForDefinition(D, Fn); | |||
2786 | ||||
2787 | if (D->hasAttr<AnnotateAttr>()) | |||
2788 | AddGlobalAnnotations(D, Fn); | |||
2789 | } | |||
2790 | ||||
2791 | void CodeGenModule::EmitGlobalDefinition(GlobalDecl GD, llvm::GlobalValue *GV) { | |||
2792 | const auto *D = cast<ValueDecl>(GD.getDecl()); | |||
2793 | ||||
2794 | PrettyStackTraceDecl CrashInfo(const_cast<ValueDecl *>(D), D->getLocation(), | |||
2795 | Context.getSourceManager(), | |||
2796 | "Generating code for declaration"); | |||
2797 | ||||
2798 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) { | |||
2799 | // At -O0, don't generate IR for functions with available_externally | |||
2800 | // linkage. | |||
2801 | if (!shouldEmitFunction(GD)) | |||
2802 | return; | |||
2803 | ||||
2804 | llvm::TimeTraceScope TimeScope("CodeGen Function", [&]() { | |||
2805 | std::string Name; | |||
2806 | llvm::raw_string_ostream OS(Name); | |||
2807 | FD->getNameForDiagnostic(OS, getContext().getPrintingPolicy(), | |||
2808 | /*Qualified=*/true); | |||
2809 | return Name; | |||
2810 | }); | |||
2811 | ||||
2812 | if (const auto *Method = dyn_cast<CXXMethodDecl>(D)) { | |||
2813 | // Make sure to emit the definition(s) before we emit the thunks. | |||
2814 | // This is necessary for the generation of certain thunks. | |||
2815 | if (isa<CXXConstructorDecl>(Method) || isa<CXXDestructorDecl>(Method)) | |||
2816 | ABI->emitCXXStructor(GD); | |||
2817 | else if (FD->isMultiVersion()) | |||
2818 | EmitMultiVersionFunctionDefinition(GD, GV); | |||
2819 | else | |||
2820 | EmitGlobalFunctionDefinition(GD, GV); | |||
2821 | ||||
2822 | if (Method->isVirtual()) | |||
2823 | getVTables().EmitThunks(GD); | |||
2824 | ||||
2825 | return; | |||
2826 | } | |||
2827 | ||||
2828 | if (FD->isMultiVersion()) | |||
2829 | return EmitMultiVersionFunctionDefinition(GD, GV); | |||
2830 | return EmitGlobalFunctionDefinition(GD, GV); | |||
2831 | } | |||
2832 | ||||
2833 | if (const auto *VD = dyn_cast<VarDecl>(D)) | |||
2834 | return EmitGlobalVarDefinition(VD, !VD->hasDefinition()); | |||
2835 | ||||
2836 | llvm_unreachable("Invalid argument to EmitGlobalDefinition()")::llvm::llvm_unreachable_internal("Invalid argument to EmitGlobalDefinition()" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2836); | |||
2837 | } | |||
2838 | ||||
2839 | static void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, | |||
2840 | llvm::Function *NewFn); | |||
2841 | ||||
2842 | static unsigned | |||
2843 | TargetMVPriority(const TargetInfo &TI, | |||
2844 | const CodeGenFunction::MultiVersionResolverOption &RO) { | |||
2845 | unsigned Priority = 0; | |||
2846 | for (StringRef Feat : RO.Conditions.Features) | |||
2847 | Priority = std::max(Priority, TI.multiVersionSortPriority(Feat)); | |||
2848 | ||||
2849 | if (!RO.Conditions.Architecture.empty()) | |||
2850 | Priority = std::max( | |||
2851 | Priority, TI.multiVersionSortPriority(RO.Conditions.Architecture)); | |||
2852 | return Priority; | |||
2853 | } | |||
2854 | ||||
2855 | void CodeGenModule::emitMultiVersionFunctions() { | |||
2856 | for (GlobalDecl GD : MultiVersionFuncs) { | |||
2857 | SmallVector<CodeGenFunction::MultiVersionResolverOption, 10> Options; | |||
2858 | const FunctionDecl *FD = cast<FunctionDecl>(GD.getDecl()); | |||
2859 | getContext().forEachMultiversionedFunctionVersion( | |||
2860 | FD, [this, &GD, &Options](const FunctionDecl *CurFD) { | |||
2861 | GlobalDecl CurGD{ | |||
2862 | (CurFD->isDefined() ? CurFD->getDefinition() : CurFD)}; | |||
2863 | StringRef MangledName = getMangledName(CurGD); | |||
2864 | llvm::Constant *Func = GetGlobalValue(MangledName); | |||
2865 | if (!Func) { | |||
2866 | if (CurFD->isDefined()) { | |||
2867 | EmitGlobalFunctionDefinition(CurGD, nullptr); | |||
2868 | Func = GetGlobalValue(MangledName); | |||
2869 | } else { | |||
2870 | const CGFunctionInfo &FI = | |||
2871 | getTypes().arrangeGlobalDeclaration(GD); | |||
2872 | llvm::FunctionType *Ty = getTypes().GetFunctionType(FI); | |||
2873 | Func = GetAddrOfFunction(CurGD, Ty, /*ForVTable=*/false, | |||
2874 | /*DontDefer=*/false, ForDefinition); | |||
2875 | } | |||
2876 | assert(Func && "This should have just been created")((Func && "This should have just been created") ? static_cast <void> (0) : __assert_fail ("Func && \"This should have just been created\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2876, __PRETTY_FUNCTION__)); | |||
2877 | } | |||
2878 | ||||
2879 | const auto *TA = CurFD->getAttr<TargetAttr>(); | |||
2880 | llvm::SmallVector<StringRef, 8> Feats; | |||
2881 | TA->getAddedFeatures(Feats); | |||
2882 | ||||
2883 | Options.emplace_back(cast<llvm::Function>(Func), | |||
2884 | TA->getArchitecture(), Feats); | |||
2885 | }); | |||
2886 | ||||
2887 | llvm::Function *ResolverFunc; | |||
2888 | const TargetInfo &TI = getTarget(); | |||
2889 | ||||
2890 | if (TI.supportsIFunc() || FD->isTargetMultiVersion()) { | |||
2891 | ResolverFunc = cast<llvm::Function>( | |||
2892 | GetGlobalValue((getMangledName(GD) + ".resolver").str())); | |||
2893 | ResolverFunc->setLinkage(llvm::Function::WeakODRLinkage); | |||
2894 | } else { | |||
2895 | ResolverFunc = cast<llvm::Function>(GetGlobalValue(getMangledName(GD))); | |||
2896 | } | |||
2897 | ||||
2898 | if (supportsCOMDAT()) | |||
2899 | ResolverFunc->setComdat( | |||
2900 | getModule().getOrInsertComdat(ResolverFunc->getName())); | |||
2901 | ||||
2902 | llvm::stable_sort( | |||
2903 | Options, [&TI](const CodeGenFunction::MultiVersionResolverOption &LHS, | |||
2904 | const CodeGenFunction::MultiVersionResolverOption &RHS) { | |||
2905 | return TargetMVPriority(TI, LHS) > TargetMVPriority(TI, RHS); | |||
2906 | }); | |||
2907 | CodeGenFunction CGF(*this); | |||
2908 | CGF.EmitMultiVersionResolver(ResolverFunc, Options); | |||
2909 | } | |||
2910 | } | |||
2911 | ||||
2912 | void CodeGenModule::emitCPUDispatchDefinition(GlobalDecl GD) { | |||
2913 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
2914 | assert(FD && "Not a FunctionDecl?")((FD && "Not a FunctionDecl?") ? static_cast<void> (0) : __assert_fail ("FD && \"Not a FunctionDecl?\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2914, __PRETTY_FUNCTION__)); | |||
2915 | const auto *DD = FD->getAttr<CPUDispatchAttr>(); | |||
2916 | assert(DD && "Not a cpu_dispatch Function?")((DD && "Not a cpu_dispatch Function?") ? static_cast <void> (0) : __assert_fail ("DD && \"Not a cpu_dispatch Function?\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 2916, __PRETTY_FUNCTION__)); | |||
2917 | llvm::Type *DeclTy = getTypes().ConvertType(FD->getType()); | |||
2918 | ||||
2919 | if (const auto *CXXFD = dyn_cast<CXXMethodDecl>(FD)) { | |||
2920 | const CGFunctionInfo &FInfo = getTypes().arrangeCXXMethodDeclaration(CXXFD); | |||
2921 | DeclTy = getTypes().GetFunctionType(FInfo); | |||
2922 | } | |||
2923 | ||||
2924 | StringRef ResolverName = getMangledName(GD); | |||
2925 | ||||
2926 | llvm::Type *ResolverType; | |||
2927 | GlobalDecl ResolverGD; | |||
2928 | if (getTarget().supportsIFunc()) | |||
2929 | ResolverType = llvm::FunctionType::get( | |||
2930 | llvm::PointerType::get(DeclTy, | |||
2931 | Context.getTargetAddressSpace(FD->getType())), | |||
2932 | false); | |||
2933 | else { | |||
2934 | ResolverType = DeclTy; | |||
2935 | ResolverGD = GD; | |||
2936 | } | |||
2937 | ||||
2938 | auto *ResolverFunc = cast<llvm::Function>(GetOrCreateLLVMFunction( | |||
2939 | ResolverName, ResolverType, ResolverGD, /*ForVTable=*/false)); | |||
2940 | ResolverFunc->setLinkage(llvm::Function::WeakODRLinkage); | |||
2941 | if (supportsCOMDAT()) | |||
2942 | ResolverFunc->setComdat( | |||
2943 | getModule().getOrInsertComdat(ResolverFunc->getName())); | |||
2944 | ||||
2945 | SmallVector<CodeGenFunction::MultiVersionResolverOption, 10> Options; | |||
2946 | const TargetInfo &Target = getTarget(); | |||
2947 | unsigned Index = 0; | |||
2948 | for (const IdentifierInfo *II : DD->cpus()) { | |||
2949 | // Get the name of the target function so we can look it up/create it. | |||
2950 | std::string MangledName = getMangledNameImpl(*this, GD, FD, true) + | |||
2951 | getCPUSpecificMangling(*this, II->getName()); | |||
2952 | ||||
2953 | llvm::Constant *Func = GetGlobalValue(MangledName); | |||
2954 | ||||
2955 | if (!Func) { | |||
2956 | GlobalDecl ExistingDecl = Manglings.lookup(MangledName); | |||
2957 | if (ExistingDecl.getDecl() && | |||
2958 | ExistingDecl.getDecl()->getAsFunction()->isDefined()) { | |||
2959 | EmitGlobalFunctionDefinition(ExistingDecl, nullptr); | |||
2960 | Func = GetGlobalValue(MangledName); | |||
2961 | } else { | |||
2962 | if (!ExistingDecl.getDecl()) | |||
2963 | ExistingDecl = GD.getWithMultiVersionIndex(Index); | |||
2964 | ||||
2965 | Func = GetOrCreateLLVMFunction( | |||
2966 | MangledName, DeclTy, ExistingDecl, | |||
2967 | /*ForVTable=*/false, /*DontDefer=*/true, | |||
2968 | /*IsThunk=*/false, llvm::AttributeList(), ForDefinition); | |||
2969 | } | |||
2970 | } | |||
2971 | ||||
2972 | llvm::SmallVector<StringRef, 32> Features; | |||
2973 | Target.getCPUSpecificCPUDispatchFeatures(II->getName(), Features); | |||
2974 | llvm::transform(Features, Features.begin(), | |||
2975 | [](StringRef Str) { return Str.substr(1); }); | |||
2976 | Features.erase(std::remove_if( | |||
2977 | Features.begin(), Features.end(), [&Target](StringRef Feat) { | |||
2978 | return !Target.validateCpuSupports(Feat); | |||
2979 | }), Features.end()); | |||
2980 | Options.emplace_back(cast<llvm::Function>(Func), StringRef{}, Features); | |||
2981 | ++Index; | |||
2982 | } | |||
2983 | ||||
2984 | llvm::sort( | |||
2985 | Options, [](const CodeGenFunction::MultiVersionResolverOption &LHS, | |||
2986 | const CodeGenFunction::MultiVersionResolverOption &RHS) { | |||
2987 | return CodeGenFunction::GetX86CpuSupportsMask(LHS.Conditions.Features) > | |||
2988 | CodeGenFunction::GetX86CpuSupportsMask(RHS.Conditions.Features); | |||
2989 | }); | |||
2990 | ||||
2991 | // If the list contains multiple 'default' versions, such as when it contains | |||
2992 | // 'pentium' and 'generic', don't emit the call to the generic one (since we | |||
2993 | // always run on at least a 'pentium'). We do this by deleting the 'least | |||
2994 | // advanced' (read, lowest mangling letter). | |||
2995 | while (Options.size() > 1 && | |||
2996 | CodeGenFunction::GetX86CpuSupportsMask( | |||
2997 | (Options.end() - 2)->Conditions.Features) == 0) { | |||
2998 | StringRef LHSName = (Options.end() - 2)->Function->getName(); | |||
2999 | StringRef RHSName = (Options.end() - 1)->Function->getName(); | |||
3000 | if (LHSName.compare(RHSName) < 0) | |||
3001 | Options.erase(Options.end() - 2); | |||
3002 | else | |||
3003 | Options.erase(Options.end() - 1); | |||
3004 | } | |||
3005 | ||||
3006 | CodeGenFunction CGF(*this); | |||
3007 | CGF.EmitMultiVersionResolver(ResolverFunc, Options); | |||
3008 | ||||
3009 | if (getTarget().supportsIFunc()) { | |||
3010 | std::string AliasName = getMangledNameImpl( | |||
3011 | *this, GD, FD, /*OmitMultiVersionMangling=*/true); | |||
3012 | llvm::Constant *AliasFunc = GetGlobalValue(AliasName); | |||
3013 | if (!AliasFunc) { | |||
3014 | auto *IFunc = cast<llvm::GlobalIFunc>(GetOrCreateLLVMFunction( | |||
3015 | AliasName, DeclTy, GD, /*ForVTable=*/false, /*DontDefer=*/true, | |||
3016 | /*IsThunk=*/false, llvm::AttributeList(), NotForDefinition)); | |||
3017 | auto *GA = llvm::GlobalAlias::create( | |||
3018 | DeclTy, 0, getFunctionLinkage(GD), AliasName, IFunc, &getModule()); | |||
3019 | GA->setLinkage(llvm::Function::WeakODRLinkage); | |||
3020 | SetCommonAttributes(GD, GA); | |||
3021 | } | |||
3022 | } | |||
3023 | } | |||
3024 | ||||
3025 | /// If a dispatcher for the specified mangled name is not in the module, create | |||
3026 | /// and return an llvm Function with the specified type. | |||
3027 | llvm::Constant *CodeGenModule::GetOrCreateMultiVersionResolver( | |||
3028 | GlobalDecl GD, llvm::Type *DeclTy, const FunctionDecl *FD) { | |||
3029 | std::string MangledName = | |||
3030 | getMangledNameImpl(*this, GD, FD, /*OmitMultiVersionMangling=*/true); | |||
3031 | ||||
3032 | // Holds the name of the resolver, in ifunc mode this is the ifunc (which has | |||
3033 | // a separate resolver). | |||
3034 | std::string ResolverName = MangledName; | |||
3035 | if (getTarget().supportsIFunc()) | |||
3036 | ResolverName += ".ifunc"; | |||
3037 | else if (FD->isTargetMultiVersion()) | |||
3038 | ResolverName += ".resolver"; | |||
3039 | ||||
3040 | // If this already exists, just return that one. | |||
3041 | if (llvm::GlobalValue *ResolverGV = GetGlobalValue(ResolverName)) | |||
3042 | return ResolverGV; | |||
3043 | ||||
3044 | // Since this is the first time we've created this IFunc, make sure | |||
3045 | // that we put this multiversioned function into the list to be | |||
3046 | // replaced later if necessary (target multiversioning only). | |||
3047 | if (!FD->isCPUDispatchMultiVersion() && !FD->isCPUSpecificMultiVersion()) | |||
3048 | MultiVersionFuncs.push_back(GD); | |||
3049 | ||||
3050 | if (getTarget().supportsIFunc()) { | |||
3051 | llvm::Type *ResolverType = llvm::FunctionType::get( | |||
3052 | llvm::PointerType::get( | |||
3053 | DeclTy, getContext().getTargetAddressSpace(FD->getType())), | |||
3054 | false); | |||
3055 | llvm::Constant *Resolver = GetOrCreateLLVMFunction( | |||
3056 | MangledName + ".resolver", ResolverType, GlobalDecl{}, | |||
3057 | /*ForVTable=*/false); | |||
3058 | llvm::GlobalIFunc *GIF = llvm::GlobalIFunc::create( | |||
3059 | DeclTy, 0, llvm::Function::WeakODRLinkage, "", Resolver, &getModule()); | |||
3060 | GIF->setName(ResolverName); | |||
3061 | SetCommonAttributes(FD, GIF); | |||
3062 | ||||
3063 | return GIF; | |||
3064 | } | |||
3065 | ||||
3066 | llvm::Constant *Resolver = GetOrCreateLLVMFunction( | |||
3067 | ResolverName, DeclTy, GlobalDecl{}, /*ForVTable=*/false); | |||
3068 | assert(isa<llvm::GlobalValue>(Resolver) &&((isa<llvm::GlobalValue>(Resolver) && "Resolver should be created for the first time" ) ? static_cast<void> (0) : __assert_fail ("isa<llvm::GlobalValue>(Resolver) && \"Resolver should be created for the first time\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 3069, __PRETTY_FUNCTION__)) | |||
3069 | "Resolver should be created for the first time")((isa<llvm::GlobalValue>(Resolver) && "Resolver should be created for the first time" ) ? static_cast<void> (0) : __assert_fail ("isa<llvm::GlobalValue>(Resolver) && \"Resolver should be created for the first time\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 3069, __PRETTY_FUNCTION__)); | |||
3070 | SetCommonAttributes(FD, cast<llvm::GlobalValue>(Resolver)); | |||
3071 | return Resolver; | |||
3072 | } | |||
3073 | ||||
3074 | /// GetOrCreateLLVMFunction - If the specified mangled name is not in the | |||
3075 | /// module, create and return an llvm Function with the specified type. If there | |||
3076 | /// is something in the module with the specified name, return it potentially | |||
3077 | /// bitcasted to the right type. | |||
3078 | /// | |||
3079 | /// If D is non-null, it specifies a decl that correspond to this. This is used | |||
3080 | /// to set the attributes on the function when it is first created. | |||
3081 | llvm::Constant *CodeGenModule::GetOrCreateLLVMFunction( | |||
3082 | StringRef MangledName, llvm::Type *Ty, GlobalDecl GD, bool ForVTable, | |||
3083 | bool DontDefer, bool IsThunk, llvm::AttributeList ExtraAttrs, | |||
3084 | ForDefinition_t IsForDefinition) { | |||
3085 | const Decl *D = GD.getDecl(); | |||
3086 | ||||
3087 | // Any attempts to use a MultiVersion function should result in retrieving | |||
3088 | // the iFunc instead. Name Mangling will handle the rest of the changes. | |||
3089 | if (const FunctionDecl *FD = cast_or_null<FunctionDecl>(D)) { | |||
3090 | // For the device mark the function as one that should be emitted. | |||
3091 | if (getLangOpts().OpenMPIsDevice && OpenMPRuntime && | |||
3092 | !OpenMPRuntime->markAsGlobalTarget(GD) && FD->isDefined() && | |||
3093 | !DontDefer && !IsForDefinition) { | |||
3094 | if (const FunctionDecl *FDDef = FD->getDefinition()) { | |||
3095 | GlobalDecl GDDef; | |||
3096 | if (const auto *CD = dyn_cast<CXXConstructorDecl>(FDDef)) | |||
3097 | GDDef = GlobalDecl(CD, GD.getCtorType()); | |||
3098 | else if (const auto *DD = dyn_cast<CXXDestructorDecl>(FDDef)) | |||
3099 | GDDef = GlobalDecl(DD, GD.getDtorType()); | |||
3100 | else | |||
3101 | GDDef = GlobalDecl(FDDef); | |||
3102 | EmitGlobal(GDDef); | |||
3103 | } | |||
3104 | } | |||
3105 | // Check if this must be emitted as declare variant and emit reference to | |||
3106 | // the the declare variant function. | |||
3107 | if (LangOpts.OpenMP && OpenMPRuntime) | |||
3108 | (void)OpenMPRuntime->emitDeclareVariant(GD, /*IsForDefinition=*/true); | |||
3109 | ||||
3110 | if (FD->isMultiVersion()) { | |||
3111 | const auto *TA = FD->getAttr<TargetAttr>(); | |||
3112 | if (TA && TA->isDefaultVersion()) | |||
3113 | UpdateMultiVersionNames(GD, FD); | |||
3114 | if (!IsForDefinition) | |||
3115 | return GetOrCreateMultiVersionResolver(GD, Ty, FD); | |||
3116 | } | |||
3117 | } | |||
3118 | ||||
3119 | // Lookup the entry, lazily creating it if necessary. | |||
3120 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
3121 | if (Entry) { | |||
3122 | if (WeakRefReferences.erase(Entry)) { | |||
3123 | const FunctionDecl *FD = cast_or_null<FunctionDecl>(D); | |||
3124 | if (FD && !FD->hasAttr<WeakAttr>()) | |||
3125 | Entry->setLinkage(llvm::Function::ExternalLinkage); | |||
3126 | } | |||
3127 | ||||
3128 | // Handle dropped DLL attributes. | |||
3129 | if (D && !D->hasAttr<DLLImportAttr>() && !D->hasAttr<DLLExportAttr>()) { | |||
3130 | Entry->setDLLStorageClass(llvm::GlobalValue::DefaultStorageClass); | |||
3131 | setDSOLocal(Entry); | |||
3132 | } | |||
3133 | ||||
3134 | // If there are two attempts to define the same mangled name, issue an | |||
3135 | // error. | |||
3136 | if (IsForDefinition && !Entry->isDeclaration()) { | |||
3137 | GlobalDecl OtherGD; | |||
3138 | // Check that GD is not yet in DiagnosedConflictingDefinitions is required | |||
3139 | // to make sure that we issue an error only once. | |||
3140 | if (lookupRepresentativeDecl(MangledName, OtherGD) && | |||
3141 | (GD.getCanonicalDecl().getDecl() != | |||
3142 | OtherGD.getCanonicalDecl().getDecl()) && | |||
3143 | DiagnosedConflictingDefinitions.insert(GD).second) { | |||
3144 | getDiags().Report(D->getLocation(), diag::err_duplicate_mangled_name) | |||
3145 | << MangledName; | |||
3146 | getDiags().Report(OtherGD.getDecl()->getLocation(), | |||
3147 | diag::note_previous_definition); | |||
3148 | } | |||
3149 | } | |||
3150 | ||||
3151 | if ((isa<llvm::Function>(Entry) || isa<llvm::GlobalAlias>(Entry)) && | |||
3152 | (Entry->getType()->getElementType() == Ty)) { | |||
3153 | return Entry; | |||
3154 | } | |||
3155 | ||||
3156 | // Make sure the result is of the correct type. | |||
3157 | // (If function is requested for a definition, we always need to create a new | |||
3158 | // function, not just return a bitcast.) | |||
3159 | if (!IsForDefinition) | |||
3160 | return llvm::ConstantExpr::getBitCast(Entry, Ty->getPointerTo()); | |||
3161 | } | |||
3162 | ||||
3163 | // This function doesn't have a complete type (for example, the return | |||
3164 | // type is an incomplete struct). Use a fake type instead, and make | |||
3165 | // sure not to try to set attributes. | |||
3166 | bool IsIncompleteFunction = false; | |||
3167 | ||||
3168 | llvm::FunctionType *FTy; | |||
3169 | if (isa<llvm::FunctionType>(Ty)) { | |||
3170 | FTy = cast<llvm::FunctionType>(Ty); | |||
3171 | } else { | |||
3172 | FTy = llvm::FunctionType::get(VoidTy, false); | |||
3173 | IsIncompleteFunction = true; | |||
3174 | } | |||
3175 | ||||
3176 | llvm::Function *F = | |||
3177 | llvm::Function::Create(FTy, llvm::Function::ExternalLinkage, | |||
3178 | Entry ? StringRef() : MangledName, &getModule()); | |||
3179 | ||||
3180 | // If we already created a function with the same mangled name (but different | |||
3181 | // type) before, take its name and add it to the list of functions to be | |||
3182 | // replaced with F at the end of CodeGen. | |||
3183 | // | |||
3184 | // This happens if there is a prototype for a function (e.g. "int f()") and | |||
3185 | // then a definition of a different type (e.g. "int f(int x)"). | |||
3186 | if (Entry) { | |||
3187 | F->takeName(Entry); | |||
3188 | ||||
3189 | // This might be an implementation of a function without a prototype, in | |||
3190 | // which case, try to do special replacement of calls which match the new | |||
3191 | // prototype. The really key thing here is that we also potentially drop | |||
3192 | // arguments from the call site so as to make a direct call, which makes the | |||
3193 | // inliner happier and suppresses a number of optimizer warnings (!) about | |||
3194 | // dropping arguments. | |||
3195 | if (!Entry->use_empty()) { | |||
3196 | ReplaceUsesOfNonProtoTypeWithRealFunction(Entry, F); | |||
3197 | Entry->removeDeadConstantUsers(); | |||
3198 | } | |||
3199 | ||||
3200 | llvm::Constant *BC = llvm::ConstantExpr::getBitCast( | |||
3201 | F, Entry->getType()->getElementType()->getPointerTo()); | |||
3202 | addGlobalValReplacement(Entry, BC); | |||
3203 | } | |||
3204 | ||||
3205 | assert(F->getName() == MangledName && "name was uniqued!")((F->getName() == MangledName && "name was uniqued!" ) ? static_cast<void> (0) : __assert_fail ("F->getName() == MangledName && \"name was uniqued!\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 3205, __PRETTY_FUNCTION__)); | |||
3206 | if (D) | |||
3207 | SetFunctionAttributes(GD, F, IsIncompleteFunction, IsThunk); | |||
3208 | if (ExtraAttrs.hasAttributes(llvm::AttributeList::FunctionIndex)) { | |||
3209 | llvm::AttrBuilder B(ExtraAttrs, llvm::AttributeList::FunctionIndex); | |||
3210 | F->addAttributes(llvm::AttributeList::FunctionIndex, B); | |||
3211 | } | |||
3212 | ||||
3213 | if (!DontDefer) { | |||
3214 | // All MSVC dtors other than the base dtor are linkonce_odr and delegate to | |||
3215 | // each other bottoming out with the base dtor. Therefore we emit non-base | |||
3216 | // dtors on usage, even if there is no dtor definition in the TU. | |||
3217 | if (D && isa<CXXDestructorDecl>(D) && | |||
3218 | getCXXABI().useThunkForDtorVariant(cast<CXXDestructorDecl>(D), | |||
3219 | GD.getDtorType())) | |||
3220 | addDeferredDeclToEmit(GD); | |||
3221 | ||||
3222 | // This is the first use or definition of a mangled name. If there is a | |||
3223 | // deferred decl with this name, remember that we need to emit it at the end | |||
3224 | // of the file. | |||
3225 | auto DDI = DeferredDecls.find(MangledName); | |||
3226 | if (DDI != DeferredDecls.end()) { | |||
3227 | // Move the potentially referenced deferred decl to the | |||
3228 | // DeferredDeclsToEmit list, and remove it from DeferredDecls (since we | |||
3229 | // don't need it anymore). | |||
3230 | addDeferredDeclToEmit(DDI->second); | |||
3231 | DeferredDecls.erase(DDI); | |||
3232 | ||||
3233 | // Otherwise, there are cases we have to worry about where we're | |||
3234 | // using a declaration for which we must emit a definition but where | |||
3235 | // we might not find a top-level definition: | |||
3236 | // - member functions defined inline in their classes | |||
3237 | // - friend functions defined inline in some class | |||
3238 | // - special member functions with implicit definitions | |||
3239 | // If we ever change our AST traversal to walk into class methods, | |||
3240 | // this will be unnecessary. | |||
3241 | // | |||
3242 | // We also don't emit a definition for a function if it's going to be an | |||
3243 | // entry in a vtable, unless it's already marked as used. | |||
3244 | } else if (getLangOpts().CPlusPlus && D) { | |||
3245 | // Look for a declaration that's lexically in a record. | |||
3246 | for (const auto *FD = cast<FunctionDecl>(D)->getMostRecentDecl(); FD; | |||
3247 | FD = FD->getPreviousDecl()) { | |||
3248 | if (isa<CXXRecordDecl>(FD->getLexicalDeclContext())) { | |||
3249 | if (FD->doesThisDeclarationHaveABody()) { | |||
3250 | addDeferredDeclToEmit(GD.getWithDecl(FD)); | |||
3251 | break; | |||
3252 | } | |||
3253 | } | |||
3254 | } | |||
3255 | } | |||
3256 | } | |||
3257 | ||||
3258 | // Make sure the result is of the requested type. | |||
3259 | if (!IsIncompleteFunction) { | |||
3260 | assert(F->getType()->getElementType() == Ty)((F->getType()->getElementType() == Ty) ? static_cast< void> (0) : __assert_fail ("F->getType()->getElementType() == Ty" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 3260, __PRETTY_FUNCTION__)); | |||
3261 | return F; | |||
3262 | } | |||
3263 | ||||
3264 | llvm::Type *PTy = llvm::PointerType::getUnqual(Ty); | |||
3265 | return llvm::ConstantExpr::getBitCast(F, PTy); | |||
3266 | } | |||
3267 | ||||
3268 | /// GetAddrOfFunction - Return the address of the given function. If Ty is | |||
3269 | /// non-null, then this function will use the specified type if it has to | |||
3270 | /// create it (this occurs when we see a definition of the function). | |||
3271 | llvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD, | |||
3272 | llvm::Type *Ty, | |||
3273 | bool ForVTable, | |||
3274 | bool DontDefer, | |||
3275 | ForDefinition_t IsForDefinition) { | |||
3276 | // If there was no specific requested type, just convert it now. | |||
3277 | if (!Ty) { | |||
3278 | const auto *FD = cast<FunctionDecl>(GD.getDecl()); | |||
3279 | Ty = getTypes().ConvertType(FD->getType()); | |||
3280 | } | |||
3281 | ||||
3282 | // Devirtualized destructor calls may come through here instead of via | |||
3283 | // getAddrOfCXXStructor. Make sure we use the MS ABI base destructor instead | |||
3284 | // of the complete destructor when necessary. | |||
3285 | if (const auto *DD = dyn_cast<CXXDestructorDecl>(GD.getDecl())) { | |||
3286 | if (getTarget().getCXXABI().isMicrosoft() && | |||
3287 | GD.getDtorType() == Dtor_Complete && | |||
3288 | DD->getParent()->getNumVBases() == 0) | |||
3289 | GD = GlobalDecl(DD, Dtor_Base); | |||
3290 | } | |||
3291 | ||||
3292 | StringRef MangledName = getMangledName(GD); | |||
3293 | return GetOrCreateLLVMFunction(MangledName, Ty, GD, ForVTable, DontDefer, | |||
3294 | /*IsThunk=*/false, llvm::AttributeList(), | |||
3295 | IsForDefinition); | |||
3296 | } | |||
3297 | ||||
3298 | static const FunctionDecl * | |||
3299 | GetRuntimeFunctionDecl(ASTContext &C, StringRef Name) { | |||
3300 | TranslationUnitDecl *TUDecl = C.getTranslationUnitDecl(); | |||
3301 | DeclContext *DC = TranslationUnitDecl::castToDeclContext(TUDecl); | |||
3302 | ||||
3303 | IdentifierInfo &CII = C.Idents.get(Name); | |||
3304 | for (const auto &Result : DC->lookup(&CII)) | |||
3305 | if (const auto FD = dyn_cast<FunctionDecl>(Result)) | |||
3306 | return FD; | |||
3307 | ||||
3308 | if (!C.getLangOpts().CPlusPlus) | |||
3309 | return nullptr; | |||
3310 | ||||
3311 | // Demangle the premangled name from getTerminateFn() | |||
3312 | IdentifierInfo &CXXII = | |||
3313 | (Name == "_ZSt9terminatev" || Name == "?terminate@@YAXXZ") | |||
3314 | ? C.Idents.get("terminate") | |||
3315 | : C.Idents.get(Name); | |||
3316 | ||||
3317 | for (const auto &N : {"__cxxabiv1", "std"}) { | |||
3318 | IdentifierInfo &NS = C.Idents.get(N); | |||
3319 | for (const auto &Result : DC->lookup(&NS)) { | |||
3320 | NamespaceDecl *ND = dyn_cast<NamespaceDecl>(Result); | |||
3321 | if (auto LSD = dyn_cast<LinkageSpecDecl>(Result)) | |||
3322 | for (const auto &Result : LSD->lookup(&NS)) | |||
3323 | if ((ND = dyn_cast<NamespaceDecl>(Result))) | |||
3324 | break; | |||
3325 | ||||
3326 | if (ND) | |||
3327 | for (const auto &Result : ND->lookup(&CXXII)) | |||
3328 | if (const auto *FD = dyn_cast<FunctionDecl>(Result)) | |||
3329 | return FD; | |||
3330 | } | |||
3331 | } | |||
3332 | ||||
3333 | return nullptr; | |||
3334 | } | |||
3335 | ||||
3336 | /// CreateRuntimeFunction - Create a new runtime function with the specified | |||
3337 | /// type and name. | |||
3338 | llvm::FunctionCallee | |||
3339 | CodeGenModule::CreateRuntimeFunction(llvm::FunctionType *FTy, StringRef Name, | |||
3340 | llvm::AttributeList ExtraAttrs, bool Local, | |||
3341 | bool AssumeConvergent) { | |||
3342 | if (AssumeConvergent) { | |||
3343 | ExtraAttrs = | |||
3344 | ExtraAttrs.addAttribute(VMContext, llvm::AttributeList::FunctionIndex, | |||
3345 | llvm::Attribute::Convergent); | |||
3346 | } | |||
3347 | ||||
3348 | llvm::Constant *C = | |||
3349 | GetOrCreateLLVMFunction(Name, FTy, GlobalDecl(), /*ForVTable=*/false, | |||
3350 | /*DontDefer=*/false, /*IsThunk=*/false, | |||
3351 | ExtraAttrs); | |||
3352 | ||||
3353 | if (auto *F = dyn_cast<llvm::Function>(C)) { | |||
3354 | if (F->empty()) { | |||
3355 | F->setCallingConv(getRuntimeCC()); | |||
3356 | ||||
3357 | // In Windows Itanium environments, try to mark runtime functions | |||
3358 | // dllimport. For Mingw and MSVC, don't. We don't really know if the user | |||
3359 | // will link their standard library statically or dynamically. Marking | |||
3360 | // functions imported when they are not imported can cause linker errors | |||
3361 | // and warnings. | |||
3362 | if (!Local && getTriple().isWindowsItaniumEnvironment() && | |||
3363 | !getCodeGenOpts().LTOVisibilityPublicStd) { | |||
3364 | const FunctionDecl *FD = GetRuntimeFunctionDecl(Context, Name); | |||
3365 | if (!FD || FD->hasAttr<DLLImportAttr>()) { | |||
3366 | F->setDLLStorageClass(llvm::GlobalValue::DLLImportStorageClass); | |||
3367 | F->setLinkage(llvm::GlobalValue::ExternalLinkage); | |||
3368 | } | |||
3369 | } | |||
3370 | setDSOLocal(F); | |||
3371 | } | |||
3372 | } | |||
3373 | ||||
3374 | return {FTy, C}; | |||
3375 | } | |||
3376 | ||||
3377 | /// isTypeConstant - Determine whether an object of this type can be emitted | |||
3378 | /// as a constant. | |||
3379 | /// | |||
3380 | /// If ExcludeCtor is true, the duration when the object's constructor runs | |||
3381 | /// will not be considered. The caller will need to verify that the object is | |||
3382 | /// not written to during its construction. | |||
3383 | bool CodeGenModule::isTypeConstant(QualType Ty, bool ExcludeCtor) { | |||
3384 | if (!Ty.isConstant(Context) && !Ty->isReferenceType()) | |||
3385 | return false; | |||
3386 | ||||
3387 | if (Context.getLangOpts().CPlusPlus) { | |||
3388 | if (const CXXRecordDecl *Record | |||
3389 | = Context.getBaseElementType(Ty)->getAsCXXRecordDecl()) | |||
3390 | return ExcludeCtor && !Record->hasMutableFields() && | |||
3391 | Record->hasTrivialDestructor(); | |||
3392 | } | |||
3393 | ||||
3394 | return true; | |||
3395 | } | |||
3396 | ||||
3397 | /// GetOrCreateLLVMGlobal - If the specified mangled name is not in the module, | |||
3398 | /// create and return an llvm GlobalVariable with the specified type. If there | |||
3399 | /// is something in the module with the specified name, return it potentially | |||
3400 | /// bitcasted to the right type. | |||
3401 | /// | |||
3402 | /// If D is non-null, it specifies a decl that correspond to this. This is used | |||
3403 | /// to set the attributes on the global when it is first created. | |||
3404 | /// | |||
3405 | /// If IsForDefinition is true, it is guaranteed that an actual global with | |||
3406 | /// type Ty will be returned, not conversion of a variable with the same | |||
3407 | /// mangled name but some other type. | |||
3408 | llvm::Constant * | |||
3409 | CodeGenModule::GetOrCreateLLVMGlobal(StringRef MangledName, | |||
3410 | llvm::PointerType *Ty, | |||
3411 | const VarDecl *D, | |||
3412 | ForDefinition_t IsForDefinition) { | |||
3413 | // Lookup the entry, lazily creating it if necessary. | |||
3414 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
3415 | if (Entry) { | |||
3416 | if (WeakRefReferences.erase(Entry)) { | |||
3417 | if (D && !D->hasAttr<WeakAttr>()) | |||
3418 | Entry->setLinkage(llvm::Function::ExternalLinkage); | |||
3419 | } | |||
3420 | ||||
3421 | // Handle dropped DLL attributes. | |||
3422 | if (D && !D->hasAttr<DLLImportAttr>() && !D->hasAttr<DLLExportAttr>()) | |||
3423 | Entry->setDLLStorageClass(llvm::GlobalValue::DefaultStorageClass); | |||
3424 | ||||
3425 | if (LangOpts.OpenMP && !LangOpts.OpenMPSimd && D) | |||
3426 | getOpenMPRuntime().registerTargetGlobalVariable(D, Entry); | |||
3427 | ||||
3428 | if (Entry->getType() == Ty) | |||
3429 | return Entry; | |||
3430 | ||||
3431 | // If there are two attempts to define the same mangled name, issue an | |||
3432 | // error. | |||
3433 | if (IsForDefinition && !Entry->isDeclaration()) { | |||
3434 | GlobalDecl OtherGD; | |||
3435 | const VarDecl *OtherD; | |||
3436 | ||||
3437 | // Check that D is not yet in DiagnosedConflictingDefinitions is required | |||
3438 | // to make sure that we issue an error only once. | |||
3439 | if (D && lookupRepresentativeDecl(MangledName, OtherGD) && | |||
3440 | (D->getCanonicalDecl() != OtherGD.getCanonicalDecl().getDecl()) && | |||
3441 | (OtherD = dyn_cast<VarDecl>(OtherGD.getDecl())) && | |||
3442 | OtherD->hasInit() && | |||
3443 | DiagnosedConflictingDefinitions.insert(D).second) { | |||
3444 | getDiags().Report(D->getLocation(), diag::err_duplicate_mangled_name) | |||
3445 | << MangledName; | |||
3446 | getDiags().Report(OtherGD.getDecl()->getLocation(), | |||
3447 | diag::note_previous_definition); | |||
3448 | } | |||
3449 | } | |||
3450 | ||||
3451 | // Make sure the result is of the correct type. | |||
3452 | if (Entry->getType()->getAddressSpace() != Ty->getAddressSpace()) | |||
3453 | return llvm::ConstantExpr::getAddrSpaceCast(Entry, Ty); | |||
3454 | ||||
3455 | // (If global is requested for a definition, we always need to create a new | |||
3456 | // global, not just return a bitcast.) | |||
3457 | if (!IsForDefinition) | |||
3458 | return llvm::ConstantExpr::getBitCast(Entry, Ty); | |||
3459 | } | |||
3460 | ||||
3461 | auto AddrSpace = GetGlobalVarAddressSpace(D); | |||
3462 | auto TargetAddrSpace = getContext().getTargetAddressSpace(AddrSpace); | |||
3463 | ||||
3464 | auto *GV = new llvm::GlobalVariable( | |||
3465 | getModule(), Ty->getElementType(), false, | |||
3466 | llvm::GlobalValue::ExternalLinkage, nullptr, MangledName, nullptr, | |||
3467 | llvm::GlobalVariable::NotThreadLocal, TargetAddrSpace); | |||
3468 | ||||
3469 | // If we already created a global with the same mangled name (but different | |||
3470 | // type) before, take its name and remove it from its parent. | |||
3471 | if (Entry) { | |||
3472 | GV->takeName(Entry); | |||
3473 | ||||
3474 | if (!Entry->use_empty()) { | |||
3475 | llvm::Constant *NewPtrForOldDecl = | |||
3476 | llvm::ConstantExpr::getBitCast(GV, Entry->getType()); | |||
3477 | Entry->replaceAllUsesWith(NewPtrForOldDecl); | |||
3478 | } | |||
3479 | ||||
3480 | Entry->eraseFromParent(); | |||
3481 | } | |||
3482 | ||||
3483 | // This is the first use or definition of a mangled name. If there is a | |||
3484 | // deferred decl with this name, remember that we need to emit it at the end | |||
3485 | // of the file. | |||
3486 | auto DDI = DeferredDecls.find(MangledName); | |||
3487 | if (DDI != DeferredDecls.end()) { | |||
3488 | // Move the potentially referenced deferred decl to the DeferredDeclsToEmit | |||
3489 | // list, and remove it from DeferredDecls (since we don't need it anymore). | |||
3490 | addDeferredDeclToEmit(DDI->second); | |||
3491 | DeferredDecls.erase(DDI); | |||
3492 | } | |||
3493 | ||||
3494 | // Handle things which are present even on external declarations. | |||
3495 | if (D) { | |||
3496 | if (LangOpts.OpenMP && !LangOpts.OpenMPSimd) | |||
3497 | getOpenMPRuntime().registerTargetGlobalVariable(D, GV); | |||
3498 | ||||
3499 | // FIXME: This code is overly simple and should be merged with other global | |||
3500 | // handling. | |||
3501 | GV->setConstant(isTypeConstant(D->getType(), false)); | |||
3502 | ||||
3503 | GV->setAlignment(getContext().getDeclAlign(D).getAsAlign()); | |||
3504 | ||||
3505 | setLinkageForGV(GV, D); | |||
3506 | ||||
3507 | if (D->getTLSKind()) { | |||
3508 | if (D->getTLSKind() == VarDecl::TLS_Dynamic) | |||
3509 | CXXThreadLocals.push_back(D); | |||
3510 | setTLSMode(GV, *D); | |||
3511 | } | |||
3512 | ||||
3513 | setGVProperties(GV, D); | |||
3514 | ||||
3515 | // If required by the ABI, treat declarations of static data members with | |||
3516 | // inline initializers as definitions. | |||
3517 | if (getContext().isMSStaticDataMemberInlineDefinition(D)) { | |||
3518 | EmitGlobalVarDefinition(D); | |||
3519 | } | |||
3520 | ||||
3521 | // Emit section information for extern variables. | |||
3522 | if (D->hasExternalStorage()) { | |||
3523 | if (const SectionAttr *SA = D->getAttr<SectionAttr>()) | |||
3524 | GV->setSection(SA->getName()); | |||
3525 | } | |||
3526 | ||||
3527 | // Handle XCore specific ABI requirements. | |||
3528 | if (getTriple().getArch() == llvm::Triple::xcore && | |||
3529 | D->getLanguageLinkage() == CLanguageLinkage && | |||
3530 | D->getType().isConstant(Context) && | |||
3531 | isExternallyVisible(D->getLinkageAndVisibility().getLinkage())) | |||
3532 | GV->setSection(".cp.rodata"); | |||
3533 | ||||
3534 | // Check if we a have a const declaration with an initializer, we may be | |||
3535 | // able to emit it as available_externally to expose it's value to the | |||
3536 | // optimizer. | |||
3537 | if (Context.getLangOpts().CPlusPlus && GV->hasExternalLinkage() && | |||
3538 | D->getType().isConstQualified() && !GV->hasInitializer() && | |||
3539 | !D->hasDefinition() && D->hasInit() && !D->hasAttr<DLLImportAttr>()) { | |||
3540 | const auto *Record = | |||
3541 | Context.getBaseElementType(D->getType())->getAsCXXRecordDecl(); | |||
3542 | bool HasMutableFields = Record && Record->hasMutableFields(); | |||
3543 | if (!HasMutableFields) { | |||
3544 | const VarDecl *InitDecl; | |||
3545 | const Expr *InitExpr = D->getAnyInitializer(InitDecl); | |||
3546 | if (InitExpr) { | |||
3547 | ConstantEmitter emitter(*this); | |||
3548 | llvm::Constant *Init = emitter.tryEmitForInitializer(*InitDecl); | |||
3549 | if (Init) { | |||
3550 | auto *InitType = Init->getType(); | |||
3551 | if (GV->getType()->getElementType() != InitType) { | |||
3552 | // The type of the initializer does not match the definition. | |||
3553 | // This happens when an initializer has a different type from | |||
3554 | // the type of the global (because of padding at the end of a | |||
3555 | // structure for instance). | |||
3556 | GV->setName(StringRef()); | |||
3557 | // Make a new global with the correct type, this is now guaranteed | |||
3558 | // to work. | |||
3559 | auto *NewGV = cast<llvm::GlobalVariable>( | |||
3560 | GetAddrOfGlobalVar(D, InitType, IsForDefinition) | |||
3561 | ->stripPointerCasts()); | |||
3562 | ||||
3563 | // Erase the old global, since it is no longer used. | |||
3564 | GV->eraseFromParent(); | |||
3565 | GV = NewGV; | |||
3566 | } else { | |||
3567 | GV->setInitializer(Init); | |||
3568 | GV->setConstant(true); | |||
3569 | GV->setLinkage(llvm::GlobalValue::AvailableExternallyLinkage); | |||
3570 | } | |||
3571 | emitter.finalize(GV); | |||
3572 | } | |||
3573 | } | |||
3574 | } | |||
3575 | } | |||
3576 | } | |||
3577 | ||||
3578 | if (GV->isDeclaration()) | |||
3579 | getTargetCodeGenInfo().setTargetAttributes(D, GV, *this); | |||
3580 | ||||
3581 | LangAS ExpectedAS = | |||
3582 | D ? D->getType().getAddressSpace() | |||
3583 | : (LangOpts.OpenCL ? LangAS::opencl_global : LangAS::Default); | |||
3584 | assert(getContext().getTargetAddressSpace(ExpectedAS) ==((getContext().getTargetAddressSpace(ExpectedAS) == Ty->getPointerAddressSpace ()) ? static_cast<void> (0) : __assert_fail ("getContext().getTargetAddressSpace(ExpectedAS) == Ty->getPointerAddressSpace()" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 3585, __PRETTY_FUNCTION__)) | |||
3585 | Ty->getPointerAddressSpace())((getContext().getTargetAddressSpace(ExpectedAS) == Ty->getPointerAddressSpace ()) ? static_cast<void> (0) : __assert_fail ("getContext().getTargetAddressSpace(ExpectedAS) == Ty->getPointerAddressSpace()" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 3585, __PRETTY_FUNCTION__)); | |||
3586 | if (AddrSpace != ExpectedAS) | |||
3587 | return getTargetCodeGenInfo().performAddrSpaceCast(*this, GV, AddrSpace, | |||
3588 | ExpectedAS, Ty); | |||
3589 | ||||
3590 | return GV; | |||
3591 | } | |||
3592 | ||||
3593 | llvm::Constant * | |||
3594 | CodeGenModule::GetAddrOfGlobal(GlobalDecl GD, | |||
3595 | ForDefinition_t IsForDefinition) { | |||
3596 | const Decl *D = GD.getDecl(); | |||
3597 | if (isa<CXXConstructorDecl>(D) || isa<CXXDestructorDecl>(D)) | |||
3598 | return getAddrOfCXXStructor(GD, /*FnInfo=*/nullptr, /*FnType=*/nullptr, | |||
3599 | /*DontDefer=*/false, IsForDefinition); | |||
3600 | else if (isa<CXXMethodDecl>(D)) { | |||
3601 | auto FInfo = &getTypes().arrangeCXXMethodDeclaration( | |||
3602 | cast<CXXMethodDecl>(D)); | |||
3603 | auto Ty = getTypes().GetFunctionType(*FInfo); | |||
3604 | return GetAddrOfFunction(GD, Ty, /*ForVTable=*/false, /*DontDefer=*/false, | |||
3605 | IsForDefinition); | |||
3606 | } else if (isa<FunctionDecl>(D)) { | |||
3607 | const CGFunctionInfo &FI = getTypes().arrangeGlobalDeclaration(GD); | |||
3608 | llvm::FunctionType *Ty = getTypes().GetFunctionType(FI); | |||
3609 | return GetAddrOfFunction(GD, Ty, /*ForVTable=*/false, /*DontDefer=*/false, | |||
3610 | IsForDefinition); | |||
3611 | } else | |||
3612 | return GetAddrOfGlobalVar(cast<VarDecl>(D), /*Ty=*/nullptr, | |||
3613 | IsForDefinition); | |||
3614 | } | |||
3615 | ||||
3616 | llvm::GlobalVariable *CodeGenModule::CreateOrReplaceCXXRuntimeVariable( | |||
3617 | StringRef Name, llvm::Type *Ty, llvm::GlobalValue::LinkageTypes Linkage, | |||
3618 | unsigned Alignment) { | |||
3619 | llvm::GlobalVariable *GV = getModule().getNamedGlobal(Name); | |||
3620 | llvm::GlobalVariable *OldGV = nullptr; | |||
3621 | ||||
3622 | if (GV) { | |||
3623 | // Check if the variable has the right type. | |||
3624 | if (GV->getType()->getElementType() == Ty) | |||
3625 | return GV; | |||
3626 | ||||
3627 | // Because C++ name mangling, the only way we can end up with an already | |||
3628 | // existing global with the same name is if it has been declared extern "C". | |||
3629 | assert(GV->isDeclaration() && "Declaration has wrong type!")((GV->isDeclaration() && "Declaration has wrong type!" ) ? static_cast<void> (0) : __assert_fail ("GV->isDeclaration() && \"Declaration has wrong type!\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 3629, __PRETTY_FUNCTION__)); | |||
3630 | OldGV = GV; | |||
3631 | } | |||
3632 | ||||
3633 | // Create a new variable. | |||
3634 | GV = new llvm::GlobalVariable(getModule(), Ty, /*isConstant=*/true, | |||
3635 | Linkage, nullptr, Name); | |||
3636 | ||||
3637 | if (OldGV) { | |||
3638 | // Replace occurrences of the old variable if needed. | |||
3639 | GV->takeName(OldGV); | |||
3640 | ||||
3641 | if (!OldGV->use_empty()) { | |||
3642 | llvm::Constant *NewPtrForOldDecl = | |||
3643 | llvm::ConstantExpr::getBitCast(GV, OldGV->getType()); | |||
3644 | OldGV->replaceAllUsesWith(NewPtrForOldDecl); | |||
3645 | } | |||
3646 | ||||
3647 | OldGV->eraseFromParent(); | |||
3648 | } | |||
3649 | ||||
3650 | if (supportsCOMDAT() && GV->isWeakForLinker() && | |||
3651 | !GV->hasAvailableExternallyLinkage()) | |||
3652 | GV->setComdat(TheModule.getOrInsertComdat(GV->getName())); | |||
3653 | ||||
3654 | GV->setAlignment(llvm::MaybeAlign(Alignment)); | |||
3655 | ||||
3656 | return GV; | |||
3657 | } | |||
3658 | ||||
3659 | /// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the | |||
3660 | /// given global variable. If Ty is non-null and if the global doesn't exist, | |||
3661 | /// then it will be created with the specified type instead of whatever the | |||
3662 | /// normal requested type would be. If IsForDefinition is true, it is guaranteed | |||
3663 | /// that an actual global with type Ty will be returned, not conversion of a | |||
3664 | /// variable with the same mangled name but some other type. | |||
3665 | llvm::Constant *CodeGenModule::GetAddrOfGlobalVar(const VarDecl *D, | |||
3666 | llvm::Type *Ty, | |||
3667 | ForDefinition_t IsForDefinition) { | |||
3668 | assert(D->hasGlobalStorage() && "Not a global variable")((D->hasGlobalStorage() && "Not a global variable" ) ? static_cast<void> (0) : __assert_fail ("D->hasGlobalStorage() && \"Not a global variable\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 3668, __PRETTY_FUNCTION__)); | |||
3669 | QualType ASTTy = D->getType(); | |||
3670 | if (!Ty) | |||
3671 | Ty = getTypes().ConvertTypeForMem(ASTTy); | |||
3672 | ||||
3673 | llvm::PointerType *PTy = | |||
3674 | llvm::PointerType::get(Ty, getContext().getTargetAddressSpace(ASTTy)); | |||
3675 | ||||
3676 | StringRef MangledName = getMangledName(D); | |||
3677 | return GetOrCreateLLVMGlobal(MangledName, PTy, D, IsForDefinition); | |||
3678 | } | |||
3679 | ||||
3680 | /// CreateRuntimeVariable - Create a new runtime global variable with the | |||
3681 | /// specified type and name. | |||
3682 | llvm::Constant * | |||
3683 | CodeGenModule::CreateRuntimeVariable(llvm::Type *Ty, | |||
3684 | StringRef Name) { | |||
3685 | auto PtrTy = | |||
3686 | getContext().getLangOpts().OpenCL | |||
3687 | ? llvm::PointerType::get( | |||
3688 | Ty, getContext().getTargetAddressSpace(LangAS::opencl_global)) | |||
3689 | : llvm::PointerType::getUnqual(Ty); | |||
3690 | auto *Ret = GetOrCreateLLVMGlobal(Name, PtrTy, nullptr); | |||
3691 | setDSOLocal(cast<llvm::GlobalValue>(Ret->stripPointerCasts())); | |||
3692 | return Ret; | |||
3693 | } | |||
3694 | ||||
3695 | void CodeGenModule::EmitTentativeDefinition(const VarDecl *D) { | |||
3696 | assert(!D->getInit() && "Cannot emit definite definitions here!")((!D->getInit() && "Cannot emit definite definitions here!" ) ? static_cast<void> (0) : __assert_fail ("!D->getInit() && \"Cannot emit definite definitions here!\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 3696, __PRETTY_FUNCTION__)); | |||
3697 | ||||
3698 | StringRef MangledName = getMangledName(D); | |||
3699 | llvm::GlobalValue *GV = GetGlobalValue(MangledName); | |||
3700 | ||||
3701 | // We already have a definition, not declaration, with the same mangled name. | |||
3702 | // Emitting of declaration is not required (and actually overwrites emitted | |||
3703 | // definition). | |||
3704 | if (GV && !GV->isDeclaration()) | |||
3705 | return; | |||
3706 | ||||
3707 | // If we have not seen a reference to this variable yet, place it into the | |||
3708 | // deferred declarations table to be emitted if needed later. | |||
3709 | if (!MustBeEmitted(D) && !GV) { | |||
3710 | DeferredDecls[MangledName] = D; | |||
3711 | return; | |||
3712 | } | |||
3713 | ||||
3714 | // The tentative definition is the only definition. | |||
3715 | EmitGlobalVarDefinition(D); | |||
3716 | } | |||
3717 | ||||
3718 | CharUnits CodeGenModule::GetTargetTypeStoreSize(llvm::Type *Ty) const { | |||
3719 | return Context.toCharUnitsFromBits( | |||
3720 | getDataLayout().getTypeStoreSizeInBits(Ty)); | |||
3721 | } | |||
3722 | ||||
3723 | LangAS CodeGenModule::GetGlobalVarAddressSpace(const VarDecl *D) { | |||
3724 | LangAS AddrSpace = LangAS::Default; | |||
3725 | if (LangOpts.OpenCL) { | |||
3726 | AddrSpace = D ? D->getType().getAddressSpace() : LangAS::opencl_global; | |||
3727 | assert(AddrSpace == LangAS::opencl_global ||((AddrSpace == LangAS::opencl_global || AddrSpace == LangAS:: opencl_constant || AddrSpace == LangAS::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace) ? static_cast<void > (0) : __assert_fail ("AddrSpace == LangAS::opencl_global || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 3730, __PRETTY_FUNCTION__)) | |||
3728 | AddrSpace == LangAS::opencl_constant ||((AddrSpace == LangAS::opencl_global || AddrSpace == LangAS:: opencl_constant || AddrSpace == LangAS::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace) ? static_cast<void > (0) : __assert_fail ("AddrSpace == LangAS::opencl_global || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 3730, __PRETTY_FUNCTION__)) | |||
3729 | AddrSpace == LangAS::opencl_local ||((AddrSpace == LangAS::opencl_global || AddrSpace == LangAS:: opencl_constant || AddrSpace == LangAS::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace) ? static_cast<void > (0) : __assert_fail ("AddrSpace == LangAS::opencl_global || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 3730, __PRETTY_FUNCTION__)) | |||
3730 | AddrSpace >= LangAS::FirstTargetAddressSpace)((AddrSpace == LangAS::opencl_global || AddrSpace == LangAS:: opencl_constant || AddrSpace == LangAS::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace) ? static_cast<void > (0) : __assert_fail ("AddrSpace == LangAS::opencl_global || AddrSpace == LangAS::opencl_constant || AddrSpace == LangAS::opencl_local || AddrSpace >= LangAS::FirstTargetAddressSpace" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 3730, __PRETTY_FUNCTION__)); | |||
3731 | return AddrSpace; | |||
3732 | } | |||
3733 | ||||
3734 | if (LangOpts.CUDA && LangOpts.CUDAIsDevice) { | |||
3735 | if (D && D->hasAttr<CUDAConstantAttr>()) | |||
3736 | return LangAS::cuda_constant; | |||
3737 | else if (D && D->hasAttr<CUDASharedAttr>()) | |||
3738 | return LangAS::cuda_shared; | |||
3739 | else if (D && D->hasAttr<CUDADeviceAttr>()) | |||
3740 | return LangAS::cuda_device; | |||
3741 | else if (D && D->getType().isConstQualified()) | |||
3742 | return LangAS::cuda_constant; | |||
3743 | else | |||
3744 | return LangAS::cuda_device; | |||
3745 | } | |||
3746 | ||||
3747 | if (LangOpts.OpenMP) { | |||
3748 | LangAS AS; | |||
3749 | if (OpenMPRuntime->hasAllocateAttributeForGlobalVar(D, AS)) | |||
3750 | return AS; | |||
3751 | } | |||
3752 | return getTargetCodeGenInfo().getGlobalVarAddressSpace(*this, D); | |||
3753 | } | |||
3754 | ||||
3755 | LangAS CodeGenModule::getStringLiteralAddressSpace() const { | |||
3756 | // OpenCL v1.2 s6.5.3: a string literal is in the constant address space. | |||
3757 | if (LangOpts.OpenCL) | |||
3758 | return LangAS::opencl_constant; | |||
3759 | if (auto AS = getTarget().getConstantAddressSpace()) | |||
3760 | return AS.getValue(); | |||
3761 | return LangAS::Default; | |||
3762 | } | |||
3763 | ||||
3764 | // In address space agnostic languages, string literals are in default address | |||
3765 | // space in AST. However, certain targets (e.g. amdgcn) request them to be | |||
3766 | // emitted in constant address space in LLVM IR. To be consistent with other | |||
3767 | // parts of AST, string literal global variables in constant address space | |||
3768 | // need to be casted to default address space before being put into address | |||
3769 | // map and referenced by other part of CodeGen. | |||
3770 | // In OpenCL, string literals are in constant address space in AST, therefore | |||
3771 | // they should not be casted to default address space. | |||
3772 | static llvm::Constant * | |||
3773 | castStringLiteralToDefaultAddressSpace(CodeGenModule &CGM, | |||
3774 | llvm::GlobalVariable *GV) { | |||
3775 | llvm::Constant *Cast = GV; | |||
3776 | if (!CGM.getLangOpts().OpenCL) { | |||
3777 | if (auto AS = CGM.getTarget().getConstantAddressSpace()) { | |||
3778 | if (AS != LangAS::Default) | |||
3779 | Cast = CGM.getTargetCodeGenInfo().performAddrSpaceCast( | |||
3780 | CGM, GV, AS.getValue(), LangAS::Default, | |||
3781 | GV->getValueType()->getPointerTo( | |||
3782 | CGM.getContext().getTargetAddressSpace(LangAS::Default))); | |||
3783 | } | |||
3784 | } | |||
3785 | return Cast; | |||
3786 | } | |||
3787 | ||||
3788 | template<typename SomeDecl> | |||
3789 | void CodeGenModule::MaybeHandleStaticInExternC(const SomeDecl *D, | |||
3790 | llvm::GlobalValue *GV) { | |||
3791 | if (!getLangOpts().CPlusPlus) | |||
3792 | return; | |||
3793 | ||||
3794 | // Must have 'used' attribute, or else inline assembly can't rely on | |||
3795 | // the name existing. | |||
3796 | if (!D->template hasAttr<UsedAttr>()) | |||
3797 | return; | |||
3798 | ||||
3799 | // Must have internal linkage and an ordinary name. | |||
3800 | if (!D->getIdentifier() || D->getFormalLinkage() != InternalLinkage) | |||
3801 | return; | |||
3802 | ||||
3803 | // Must be in an extern "C" context. Entities declared directly within | |||
3804 | // a record are not extern "C" even if the record is in such a context. | |||
3805 | const SomeDecl *First = D->getFirstDecl(); | |||
3806 | if (First->getDeclContext()->isRecord() || !First->isInExternCContext()) | |||
3807 | return; | |||
3808 | ||||
3809 | // OK, this is an internal linkage entity inside an extern "C" linkage | |||
3810 | // specification. Make a note of that so we can give it the "expected" | |||
3811 | // mangled name if nothing else is using that name. | |||
3812 | std::pair<StaticExternCMap::iterator, bool> R = | |||
3813 | StaticExternCValues.insert(std::make_pair(D->getIdentifier(), GV)); | |||
3814 | ||||
3815 | // If we have multiple internal linkage entities with the same name | |||
3816 | // in extern "C" regions, none of them gets that name. | |||
3817 | if (!R.second) | |||
3818 | R.first->second = nullptr; | |||
3819 | } | |||
3820 | ||||
3821 | static bool shouldBeInCOMDAT(CodeGenModule &CGM, const Decl &D) { | |||
3822 | if (!CGM.supportsCOMDAT()) | |||
3823 | return false; | |||
3824 | ||||
3825 | // Do not set COMDAT attribute for CUDA/HIP stub functions to prevent | |||
3826 | // them being "merged" by the COMDAT Folding linker optimization. | |||
3827 | if (D.hasAttr<CUDAGlobalAttr>()) | |||
3828 | return false; | |||
3829 | ||||
3830 | if (D.hasAttr<SelectAnyAttr>()) | |||
3831 | return true; | |||
3832 | ||||
3833 | GVALinkage Linkage; | |||
3834 | if (auto *VD = dyn_cast<VarDecl>(&D)) | |||
3835 | Linkage = CGM.getContext().GetGVALinkageForVariable(VD); | |||
3836 | else | |||
3837 | Linkage = CGM.getContext().GetGVALinkageForFunction(cast<FunctionDecl>(&D)); | |||
3838 | ||||
3839 | switch (Linkage) { | |||
3840 | case GVA_Internal: | |||
3841 | case GVA_AvailableExternally: | |||
3842 | case GVA_StrongExternal: | |||
3843 | return false; | |||
3844 | case GVA_DiscardableODR: | |||
3845 | case GVA_StrongODR: | |||
3846 | return true; | |||
3847 | } | |||
3848 | llvm_unreachable("No such linkage")::llvm::llvm_unreachable_internal("No such linkage", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 3848); | |||
3849 | } | |||
3850 | ||||
3851 | void CodeGenModule::maybeSetTrivialComdat(const Decl &D, | |||
3852 | llvm::GlobalObject &GO) { | |||
3853 | if (!shouldBeInCOMDAT(*this, D)) | |||
3854 | return; | |||
3855 | GO.setComdat(TheModule.getOrInsertComdat(GO.getName())); | |||
3856 | } | |||
3857 | ||||
3858 | /// Pass IsTentative as true if you want to create a tentative definition. | |||
3859 | void CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D, | |||
3860 | bool IsTentative) { | |||
3861 | // OpenCL global variables of sampler type are translated to function calls, | |||
3862 | // therefore no need to be translated. | |||
3863 | QualType ASTTy = D->getType(); | |||
3864 | if (getLangOpts().OpenCL && ASTTy->isSamplerT()) | |||
3865 | return; | |||
3866 | ||||
3867 | // If this is OpenMP device, check if it is legal to emit this global | |||
3868 | // normally. | |||
3869 | if (LangOpts.OpenMPIsDevice && OpenMPRuntime && | |||
3870 | OpenMPRuntime->emitTargetGlobalVariable(D)) | |||
3871 | return; | |||
3872 | ||||
3873 | llvm::Constant *Init = nullptr; | |||
3874 | bool NeedsGlobalCtor = false; | |||
3875 | bool NeedsGlobalDtor = | |||
3876 | D->needsDestruction(getContext()) == QualType::DK_cxx_destructor; | |||
3877 | ||||
3878 | const VarDecl *InitDecl; | |||
3879 | const Expr *InitExpr = D->getAnyInitializer(InitDecl); | |||
3880 | ||||
3881 | Optional<ConstantEmitter> emitter; | |||
3882 | ||||
3883 | // CUDA E.2.4.1 "__shared__ variables cannot have an initialization | |||
3884 | // as part of their declaration." Sema has already checked for | |||
3885 | // error cases, so we just need to set Init to UndefValue. | |||
3886 | bool IsCUDASharedVar = | |||
3887 | getLangOpts().CUDAIsDevice && D->hasAttr<CUDASharedAttr>(); | |||
3888 | // Shadows of initialized device-side global variables are also left | |||
3889 | // undefined. | |||
3890 | bool IsCUDAShadowVar = | |||
3891 | !getLangOpts().CUDAIsDevice && | |||
3892 | (D->hasAttr<CUDAConstantAttr>() || D->hasAttr<CUDADeviceAttr>() || | |||
3893 | D->hasAttr<CUDASharedAttr>()); | |||
3894 | // HIP pinned shadow of initialized host-side global variables are also | |||
3895 | // left undefined. | |||
3896 | bool IsHIPPinnedShadowVar = | |||
3897 | getLangOpts().CUDAIsDevice && D->hasAttr<HIPPinnedShadowAttr>(); | |||
3898 | if (getLangOpts().CUDA && | |||
3899 | (IsCUDASharedVar || IsCUDAShadowVar || IsHIPPinnedShadowVar)) | |||
3900 | Init = llvm::UndefValue::get(getTypes().ConvertType(ASTTy)); | |||
3901 | else if (!InitExpr) { | |||
3902 | // This is a tentative definition; tentative definitions are | |||
3903 | // implicitly initialized with { 0 }. | |||
3904 | // | |||
3905 | // Note that tentative definitions are only emitted at the end of | |||
3906 | // a translation unit, so they should never have incomplete | |||
3907 | // type. In addition, EmitTentativeDefinition makes sure that we | |||
3908 | // never attempt to emit a tentative definition if a real one | |||
3909 | // exists. A use may still exists, however, so we still may need | |||
3910 | // to do a RAUW. | |||
3911 | assert(!ASTTy->isIncompleteType() && "Unexpected incomplete type")((!ASTTy->isIncompleteType() && "Unexpected incomplete type" ) ? static_cast<void> (0) : __assert_fail ("!ASTTy->isIncompleteType() && \"Unexpected incomplete type\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 3911, __PRETTY_FUNCTION__)); | |||
3912 | Init = EmitNullConstant(D->getType()); | |||
3913 | } else { | |||
3914 | initializedGlobalDecl = GlobalDecl(D); | |||
3915 | emitter.emplace(*this); | |||
3916 | Init = emitter->tryEmitForInitializer(*InitDecl); | |||
3917 | ||||
3918 | if (!Init) { | |||
3919 | QualType T = InitExpr->getType(); | |||
3920 | if (D->getType()->isReferenceType()) | |||
3921 | T = D->getType(); | |||
3922 | ||||
3923 | if (getLangOpts().CPlusPlus) { | |||
3924 | Init = EmitNullConstant(T); | |||
3925 | NeedsGlobalCtor = true; | |||
3926 | } else { | |||
3927 | ErrorUnsupported(D, "static initializer"); | |||
3928 | Init = llvm::UndefValue::get(getTypes().ConvertType(T)); | |||
3929 | } | |||
3930 | } else { | |||
3931 | // We don't need an initializer, so remove the entry for the delayed | |||
3932 | // initializer position (just in case this entry was delayed) if we | |||
3933 | // also don't need to register a destructor. | |||
3934 | if (getLangOpts().CPlusPlus && !NeedsGlobalDtor) | |||
3935 | DelayedCXXInitPosition.erase(D); | |||
3936 | } | |||
3937 | } | |||
3938 | ||||
3939 | llvm::Type* InitType = Init->getType(); | |||
3940 | llvm::Constant *Entry = | |||
3941 | GetAddrOfGlobalVar(D, InitType, ForDefinition_t(!IsTentative)); | |||
3942 | ||||
3943 | // Strip off pointer casts if we got them. | |||
3944 | Entry = Entry->stripPointerCasts(); | |||
3945 | ||||
3946 | // Entry is now either a Function or GlobalVariable. | |||
3947 | auto *GV = dyn_cast<llvm::GlobalVariable>(Entry); | |||
3948 | ||||
3949 | // We have a definition after a declaration with the wrong type. | |||
3950 | // We must make a new GlobalVariable* and update everything that used OldGV | |||
3951 | // (a declaration or tentative definition) with the new GlobalVariable* | |||
3952 | // (which will be a definition). | |||
3953 | // | |||
3954 | // This happens if there is a prototype for a global (e.g. | |||
3955 | // "extern int x[];") and then a definition of a different type (e.g. | |||
3956 | // "int x[10];"). This also happens when an initializer has a different type | |||
3957 | // from the type of the global (this happens with unions). | |||
3958 | if (!GV || GV->getType()->getElementType() != InitType || | |||
3959 | GV->getType()->getAddressSpace() != | |||
3960 | getContext().getTargetAddressSpace(GetGlobalVarAddressSpace(D))) { | |||
3961 | ||||
3962 | // Move the old entry aside so that we'll create a new one. | |||
3963 | Entry->setName(StringRef()); | |||
3964 | ||||
3965 | // Make a new global with the correct type, this is now guaranteed to work. | |||
3966 | GV = cast<llvm::GlobalVariable>( | |||
3967 | GetAddrOfGlobalVar(D, InitType, ForDefinition_t(!IsTentative)) | |||
3968 | ->stripPointerCasts()); | |||
3969 | ||||
3970 | // Replace all uses of the old global with the new global | |||
3971 | llvm::Constant *NewPtrForOldDecl = | |||
3972 | llvm::ConstantExpr::getBitCast(GV, Entry->getType()); | |||
3973 | Entry->replaceAllUsesWith(NewPtrForOldDecl); | |||
3974 | ||||
3975 | // Erase the old global, since it is no longer used. | |||
3976 | cast<llvm::GlobalValue>(Entry)->eraseFromParent(); | |||
3977 | } | |||
3978 | ||||
3979 | MaybeHandleStaticInExternC(D, GV); | |||
3980 | ||||
3981 | if (D->hasAttr<AnnotateAttr>()) | |||
3982 | AddGlobalAnnotations(D, GV); | |||
3983 | ||||
3984 | // Set the llvm linkage type as appropriate. | |||
3985 | llvm::GlobalValue::LinkageTypes Linkage = | |||
3986 | getLLVMLinkageVarDefinition(D, GV->isConstant()); | |||
3987 | ||||
3988 | // CUDA B.2.1 "The __device__ qualifier declares a variable that resides on | |||
3989 | // the device. [...]" | |||
3990 | // CUDA B.2.2 "The __constant__ qualifier, optionally used together with | |||
3991 | // __device__, declares a variable that: [...] | |||
3992 | // Is accessible from all the threads within the grid and from the host | |||
3993 | // through the runtime library (cudaGetSymbolAddress() / cudaGetSymbolSize() | |||
3994 | // / cudaMemcpyToSymbol() / cudaMemcpyFromSymbol())." | |||
3995 | if (GV && LangOpts.CUDA) { | |||
3996 | if (LangOpts.CUDAIsDevice) { | |||
3997 | if (Linkage != llvm::GlobalValue::InternalLinkage && | |||
3998 | (D->hasAttr<CUDADeviceAttr>() || D->hasAttr<CUDAConstantAttr>())) | |||
3999 | GV->setExternallyInitialized(true); | |||
4000 | } else { | |||
4001 | // Host-side shadows of external declarations of device-side | |||
4002 | // global variables become internal definitions. These have to | |||
4003 | // be internal in order to prevent name conflicts with global | |||
4004 | // host variables with the same name in a different TUs. | |||
4005 | if (D->hasAttr<CUDADeviceAttr>() || D->hasAttr<CUDAConstantAttr>() || | |||
4006 | D->hasAttr<HIPPinnedShadowAttr>()) { | |||
4007 | Linkage = llvm::GlobalValue::InternalLinkage; | |||
4008 | ||||
4009 | // Shadow variables and their properties must be registered | |||
4010 | // with CUDA runtime. | |||
4011 | unsigned Flags = 0; | |||
4012 | if (!D->hasDefinition()) | |||
4013 | Flags |= CGCUDARuntime::ExternDeviceVar; | |||
4014 | if (D->hasAttr<CUDAConstantAttr>()) | |||
4015 | Flags |= CGCUDARuntime::ConstantDeviceVar; | |||
4016 | // Extern global variables will be registered in the TU where they are | |||
4017 | // defined. | |||
4018 | if (!D->hasExternalStorage()) | |||
4019 | getCUDARuntime().registerDeviceVar(D, *GV, Flags); | |||
4020 | } else if (D->hasAttr<CUDASharedAttr>()) | |||
4021 | // __shared__ variables are odd. Shadows do get created, but | |||
4022 | // they are not registered with the CUDA runtime, so they | |||
4023 | // can't really be used to access their device-side | |||
4024 | // counterparts. It's not clear yet whether it's nvcc's bug or | |||
4025 | // a feature, but we've got to do the same for compatibility. | |||
4026 | Linkage = llvm::GlobalValue::InternalLinkage; | |||
4027 | } | |||
4028 | } | |||
4029 | ||||
4030 | if (!IsHIPPinnedShadowVar) | |||
4031 | GV->setInitializer(Init); | |||
4032 | if (emitter) emitter->finalize(GV); | |||
4033 | ||||
4034 | // If it is safe to mark the global 'constant', do so now. | |||
4035 | GV->setConstant(!NeedsGlobalCtor && !NeedsGlobalDtor && | |||
4036 | isTypeConstant(D->getType(), true)); | |||
4037 | ||||
4038 | // If it is in a read-only section, mark it 'constant'. | |||
4039 | if (const SectionAttr *SA = D->getAttr<SectionAttr>()) { | |||
4040 | const ASTContext::SectionInfo &SI = Context.SectionInfos[SA->getName()]; | |||
4041 | if ((SI.SectionFlags & ASTContext::PSF_Write) == 0) | |||
4042 | GV->setConstant(true); | |||
4043 | } | |||
4044 | ||||
4045 | GV->setAlignment(getContext().getDeclAlign(D).getAsAlign()); | |||
4046 | ||||
4047 | // On Darwin, if the normal linkage of a C++ thread_local variable is | |||
4048 | // LinkOnce or Weak, we keep the normal linkage to prevent multiple | |||
4049 | // copies within a linkage unit; otherwise, the backing variable has | |||
4050 | // internal linkage and all accesses should just be calls to the | |||
4051 | // Itanium-specified entry point, which has the normal linkage of the | |||
4052 | // variable. This is to preserve the ability to change the implementation | |||
4053 | // behind the scenes. | |||
4054 | if (!D->isStaticLocal() && D->getTLSKind() == VarDecl::TLS_Dynamic && | |||
4055 | Context.getTargetInfo().getTriple().isOSDarwin() && | |||
4056 | !llvm::GlobalVariable::isLinkOnceLinkage(Linkage) && | |||
4057 | !llvm::GlobalVariable::isWeakLinkage(Linkage)) | |||
4058 | Linkage = llvm::GlobalValue::InternalLinkage; | |||
4059 | ||||
4060 | GV->setLinkage(Linkage); | |||
4061 | if (D->hasAttr<DLLImportAttr>()) | |||
4062 | GV->setDLLStorageClass(llvm::GlobalVariable::DLLImportStorageClass); | |||
4063 | else if (D->hasAttr<DLLExportAttr>()) | |||
4064 | GV->setDLLStorageClass(llvm::GlobalVariable::DLLExportStorageClass); | |||
4065 | else | |||
4066 | GV->setDLLStorageClass(llvm::GlobalVariable::DefaultStorageClass); | |||
4067 | ||||
4068 | if (Linkage == llvm::GlobalVariable::CommonLinkage) { | |||
4069 | // common vars aren't constant even if declared const. | |||
4070 | GV->setConstant(false); | |||
4071 | // Tentative definition of global variables may be initialized with | |||
4072 | // non-zero null pointers. In this case they should have weak linkage | |||
4073 | // since common linkage must have zero initializer and must not have | |||
4074 | // explicit section therefore cannot have non-zero initial value. | |||
4075 | if (!GV->getInitializer()->isNullValue()) | |||
4076 | GV->setLinkage(llvm::GlobalVariable::WeakAnyLinkage); | |||
4077 | } | |||
4078 | ||||
4079 | setNonAliasAttributes(D, GV); | |||
4080 | ||||
4081 | if (D->getTLSKind() && !GV->isThreadLocal()) { | |||
4082 | if (D->getTLSKind() == VarDecl::TLS_Dynamic) | |||
4083 | CXXThreadLocals.push_back(D); | |||
4084 | setTLSMode(GV, *D); | |||
4085 | } | |||
4086 | ||||
4087 | maybeSetTrivialComdat(*D, *GV); | |||
4088 | ||||
4089 | // Emit the initializer function if necessary. | |||
4090 | if (NeedsGlobalCtor || NeedsGlobalDtor) | |||
4091 | EmitCXXGlobalVarDeclInitFunc(D, GV, NeedsGlobalCtor); | |||
4092 | ||||
4093 | SanitizerMD->reportGlobalToASan(GV, *D, NeedsGlobalCtor); | |||
4094 | ||||
4095 | // Emit global variable debug information. | |||
4096 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
4097 | if (getCodeGenOpts().getDebugInfo() >= codegenoptions::LimitedDebugInfo) | |||
4098 | DI->EmitGlobalVariable(GV, D); | |||
4099 | } | |||
4100 | ||||
4101 | static bool isVarDeclStrongDefinition(const ASTContext &Context, | |||
4102 | CodeGenModule &CGM, const VarDecl *D, | |||
4103 | bool NoCommon) { | |||
4104 | // Don't give variables common linkage if -fno-common was specified unless it | |||
4105 | // was overridden by a NoCommon attribute. | |||
4106 | if ((NoCommon || D->hasAttr<NoCommonAttr>()) && !D->hasAttr<CommonAttr>()) | |||
4107 | return true; | |||
4108 | ||||
4109 | // C11 6.9.2/2: | |||
4110 | // A declaration of an identifier for an object that has file scope without | |||
4111 | // an initializer, and without a storage-class specifier or with the | |||
4112 | // storage-class specifier static, constitutes a tentative definition. | |||
4113 | if (D->getInit() || D->hasExternalStorage()) | |||
4114 | return true; | |||
4115 | ||||
4116 | // A variable cannot be both common and exist in a section. | |||
4117 | if (D->hasAttr<SectionAttr>()) | |||
4118 | return true; | |||
4119 | ||||
4120 | // A variable cannot be both common and exist in a section. | |||
4121 | // We don't try to determine which is the right section in the front-end. | |||
4122 | // If no specialized section name is applicable, it will resort to default. | |||
4123 | if (D->hasAttr<PragmaClangBSSSectionAttr>() || | |||
4124 | D->hasAttr<PragmaClangDataSectionAttr>() || | |||
4125 | D->hasAttr<PragmaClangRelroSectionAttr>() || | |||
4126 | D->hasAttr<PragmaClangRodataSectionAttr>()) | |||
4127 | return true; | |||
4128 | ||||
4129 | // Thread local vars aren't considered common linkage. | |||
4130 | if (D->getTLSKind()) | |||
4131 | return true; | |||
4132 | ||||
4133 | // Tentative definitions marked with WeakImportAttr are true definitions. | |||
4134 | if (D->hasAttr<WeakImportAttr>()) | |||
4135 | return true; | |||
4136 | ||||
4137 | // A variable cannot be both common and exist in a comdat. | |||
4138 | if (shouldBeInCOMDAT(CGM, *D)) | |||
4139 | return true; | |||
4140 | ||||
4141 | // Declarations with a required alignment do not have common linkage in MSVC | |||
4142 | // mode. | |||
4143 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) { | |||
4144 | if (D->hasAttr<AlignedAttr>()) | |||
4145 | return true; | |||
4146 | QualType VarType = D->getType(); | |||
4147 | if (Context.isAlignmentRequired(VarType)) | |||
4148 | return true; | |||
4149 | ||||
4150 | if (const auto *RT = VarType->getAs<RecordType>()) { | |||
4151 | const RecordDecl *RD = RT->getDecl(); | |||
4152 | for (const FieldDecl *FD : RD->fields()) { | |||
4153 | if (FD->isBitField()) | |||
4154 | continue; | |||
4155 | if (FD->hasAttr<AlignedAttr>()) | |||
4156 | return true; | |||
4157 | if (Context.isAlignmentRequired(FD->getType())) | |||
4158 | return true; | |||
4159 | } | |||
4160 | } | |||
4161 | } | |||
4162 | ||||
4163 | // Microsoft's link.exe doesn't support alignments greater than 32 bytes for | |||
4164 | // common symbols, so symbols with greater alignment requirements cannot be | |||
4165 | // common. | |||
4166 | // Other COFF linkers (ld.bfd and LLD) support arbitrary power-of-two | |||
4167 | // alignments for common symbols via the aligncomm directive, so this | |||
4168 | // restriction only applies to MSVC environments. | |||
4169 | if (Context.getTargetInfo().getTriple().isKnownWindowsMSVCEnvironment() && | |||
4170 | Context.getTypeAlignIfKnown(D->getType()) > | |||
4171 | Context.toBits(CharUnits::fromQuantity(32))) | |||
4172 | return true; | |||
4173 | ||||
4174 | return false; | |||
4175 | } | |||
4176 | ||||
4177 | llvm::GlobalValue::LinkageTypes CodeGenModule::getLLVMLinkageForDeclarator( | |||
4178 | const DeclaratorDecl *D, GVALinkage Linkage, bool IsConstantVariable) { | |||
4179 | if (Linkage == GVA_Internal) | |||
4180 | return llvm::Function::InternalLinkage; | |||
4181 | ||||
4182 | if (D->hasAttr<WeakAttr>()) { | |||
4183 | if (IsConstantVariable) | |||
4184 | return llvm::GlobalVariable::WeakODRLinkage; | |||
4185 | else | |||
4186 | return llvm::GlobalVariable::WeakAnyLinkage; | |||
4187 | } | |||
4188 | ||||
4189 | if (const auto *FD = D->getAsFunction()) | |||
4190 | if (FD->isMultiVersion() && Linkage == GVA_AvailableExternally) | |||
4191 | return llvm::GlobalVariable::LinkOnceAnyLinkage; | |||
4192 | ||||
4193 | // We are guaranteed to have a strong definition somewhere else, | |||
4194 | // so we can use available_externally linkage. | |||
4195 | if (Linkage == GVA_AvailableExternally) | |||
4196 | return llvm::GlobalValue::AvailableExternallyLinkage; | |||
4197 | ||||
4198 | // Note that Apple's kernel linker doesn't support symbol | |||
4199 | // coalescing, so we need to avoid linkonce and weak linkages there. | |||
4200 | // Normally, this means we just map to internal, but for explicit | |||
4201 | // instantiations we'll map to external. | |||
4202 | ||||
4203 | // In C++, the compiler has to emit a definition in every translation unit | |||
4204 | // that references the function. We should use linkonce_odr because | |||
4205 | // a) if all references in this translation unit are optimized away, we | |||
4206 | // don't need to codegen it. b) if the function persists, it needs to be | |||
4207 | // merged with other definitions. c) C++ has the ODR, so we know the | |||
4208 | // definition is dependable. | |||
4209 | if (Linkage == GVA_DiscardableODR) | |||
4210 | return !Context.getLangOpts().AppleKext ? llvm::Function::LinkOnceODRLinkage | |||
4211 | : llvm::Function::InternalLinkage; | |||
4212 | ||||
4213 | // An explicit instantiation of a template has weak linkage, since | |||
4214 | // explicit instantiations can occur in multiple translation units | |||
4215 | // and must all be equivalent. However, we are not allowed to | |||
4216 | // throw away these explicit instantiations. | |||
4217 | // | |||
4218 | // We don't currently support CUDA device code spread out across multiple TUs, | |||
4219 | // so say that CUDA templates are either external (for kernels) or internal. | |||
4220 | // This lets llvm perform aggressive inter-procedural optimizations. | |||
4221 | if (Linkage == GVA_StrongODR) { | |||
4222 | if (Context.getLangOpts().AppleKext) | |||
4223 | return llvm::Function::ExternalLinkage; | |||
4224 | if (Context.getLangOpts().CUDA && Context.getLangOpts().CUDAIsDevice) | |||
4225 | return D->hasAttr<CUDAGlobalAttr>() ? llvm::Function::ExternalLinkage | |||
4226 | : llvm::Function::InternalLinkage; | |||
4227 | return llvm::Function::WeakODRLinkage; | |||
4228 | } | |||
4229 | ||||
4230 | // C++ doesn't have tentative definitions and thus cannot have common | |||
4231 | // linkage. | |||
4232 | if (!getLangOpts().CPlusPlus && isa<VarDecl>(D) && | |||
4233 | !isVarDeclStrongDefinition(Context, *this, cast<VarDecl>(D), | |||
4234 | CodeGenOpts.NoCommon)) | |||
4235 | return llvm::GlobalVariable::CommonLinkage; | |||
4236 | ||||
4237 | // selectany symbols are externally visible, so use weak instead of | |||
4238 | // linkonce. MSVC optimizes away references to const selectany globals, so | |||
4239 | // all definitions should be the same and ODR linkage should be used. | |||
4240 | // http://msdn.microsoft.com/en-us/library/5tkz6s71.aspx | |||
4241 | if (D->hasAttr<SelectAnyAttr>()) | |||
4242 | return llvm::GlobalVariable::WeakODRLinkage; | |||
4243 | ||||
4244 | // Otherwise, we have strong external linkage. | |||
4245 | assert(Linkage == GVA_StrongExternal)((Linkage == GVA_StrongExternal) ? static_cast<void> (0 ) : __assert_fail ("Linkage == GVA_StrongExternal", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 4245, __PRETTY_FUNCTION__)); | |||
4246 | return llvm::GlobalVariable::ExternalLinkage; | |||
4247 | } | |||
4248 | ||||
4249 | llvm::GlobalValue::LinkageTypes CodeGenModule::getLLVMLinkageVarDefinition( | |||
4250 | const VarDecl *VD, bool IsConstant) { | |||
4251 | GVALinkage Linkage = getContext().GetGVALinkageForVariable(VD); | |||
4252 | return getLLVMLinkageForDeclarator(VD, Linkage, IsConstant); | |||
4253 | } | |||
4254 | ||||
4255 | /// Replace the uses of a function that was declared with a non-proto type. | |||
4256 | /// We want to silently drop extra arguments from call sites | |||
4257 | static void replaceUsesOfNonProtoConstant(llvm::Constant *old, | |||
4258 | llvm::Function *newFn) { | |||
4259 | // Fast path. | |||
4260 | if (old->use_empty()) return; | |||
4261 | ||||
4262 | llvm::Type *newRetTy = newFn->getReturnType(); | |||
4263 | SmallVector<llvm::Value*, 4> newArgs; | |||
4264 | SmallVector<llvm::OperandBundleDef, 1> newBundles; | |||
4265 | ||||
4266 | for (llvm::Value::use_iterator ui = old->use_begin(), ue = old->use_end(); | |||
4267 | ui != ue; ) { | |||
4268 | llvm::Value::use_iterator use = ui++; // Increment before the use is erased. | |||
4269 | llvm::User *user = use->getUser(); | |||
4270 | ||||
4271 | // Recognize and replace uses of bitcasts. Most calls to | |||
4272 | // unprototyped functions will use bitcasts. | |||
4273 | if (auto *bitcast = dyn_cast<llvm::ConstantExpr>(user)) { | |||
4274 | if (bitcast->getOpcode() == llvm::Instruction::BitCast) | |||
4275 | replaceUsesOfNonProtoConstant(bitcast, newFn); | |||
4276 | continue; | |||
4277 | } | |||
4278 | ||||
4279 | // Recognize calls to the function. | |||
4280 | llvm::CallBase *callSite = dyn_cast<llvm::CallBase>(user); | |||
4281 | if (!callSite) continue; | |||
4282 | if (!callSite->isCallee(&*use)) | |||
4283 | continue; | |||
4284 | ||||
4285 | // If the return types don't match exactly, then we can't | |||
4286 | // transform this call unless it's dead. | |||
4287 | if (callSite->getType() != newRetTy && !callSite->use_empty()) | |||
4288 | continue; | |||
4289 | ||||
4290 | // Get the call site's attribute list. | |||
4291 | SmallVector<llvm::AttributeSet, 8> newArgAttrs; | |||
4292 | llvm::AttributeList oldAttrs = callSite->getAttributes(); | |||
4293 | ||||
4294 | // If the function was passed too few arguments, don't transform. | |||
4295 | unsigned newNumArgs = newFn->arg_size(); | |||
4296 | if (callSite->arg_size() < newNumArgs) | |||
4297 | continue; | |||
4298 | ||||
4299 | // If extra arguments were passed, we silently drop them. | |||
4300 | // If any of the types mismatch, we don't transform. | |||
4301 | unsigned argNo = 0; | |||
4302 | bool dontTransform = false; | |||
4303 | for (llvm::Argument &A : newFn->args()) { | |||
4304 | if (callSite->getArgOperand(argNo)->getType() != A.getType()) { | |||
4305 | dontTransform = true; | |||
4306 | break; | |||
4307 | } | |||
4308 | ||||
4309 | // Add any parameter attributes. | |||
4310 | newArgAttrs.push_back(oldAttrs.getParamAttributes(argNo)); | |||
4311 | argNo++; | |||
4312 | } | |||
4313 | if (dontTransform) | |||
4314 | continue; | |||
4315 | ||||
4316 | // Okay, we can transform this. Create the new call instruction and copy | |||
4317 | // over the required information. | |||
4318 | newArgs.append(callSite->arg_begin(), callSite->arg_begin() + argNo); | |||
4319 | ||||
4320 | // Copy over any operand bundles. | |||
4321 | callSite->getOperandBundlesAsDefs(newBundles); | |||
4322 | ||||
4323 | llvm::CallBase *newCall; | |||
4324 | if (dyn_cast<llvm::CallInst>(callSite)) { | |||
4325 | newCall = | |||
4326 | llvm::CallInst::Create(newFn, newArgs, newBundles, "", callSite); | |||
4327 | } else { | |||
4328 | auto *oldInvoke = cast<llvm::InvokeInst>(callSite); | |||
4329 | newCall = llvm::InvokeInst::Create(newFn, oldInvoke->getNormalDest(), | |||
4330 | oldInvoke->getUnwindDest(), newArgs, | |||
4331 | newBundles, "", callSite); | |||
4332 | } | |||
4333 | newArgs.clear(); // for the next iteration | |||
4334 | ||||
4335 | if (!newCall->getType()->isVoidTy()) | |||
4336 | newCall->takeName(callSite); | |||
4337 | newCall->setAttributes(llvm::AttributeList::get( | |||
4338 | newFn->getContext(), oldAttrs.getFnAttributes(), | |||
4339 | oldAttrs.getRetAttributes(), newArgAttrs)); | |||
4340 | newCall->setCallingConv(callSite->getCallingConv()); | |||
4341 | ||||
4342 | // Finally, remove the old call, replacing any uses with the new one. | |||
4343 | if (!callSite->use_empty()) | |||
4344 | callSite->replaceAllUsesWith(newCall); | |||
4345 | ||||
4346 | // Copy debug location attached to CI. | |||
4347 | if (callSite->getDebugLoc()) | |||
4348 | newCall->setDebugLoc(callSite->getDebugLoc()); | |||
4349 | ||||
4350 | callSite->eraseFromParent(); | |||
4351 | } | |||
4352 | } | |||
4353 | ||||
4354 | /// ReplaceUsesOfNonProtoTypeWithRealFunction - This function is called when we | |||
4355 | /// implement a function with no prototype, e.g. "int foo() {}". If there are | |||
4356 | /// existing call uses of the old function in the module, this adjusts them to | |||
4357 | /// call the new function directly. | |||
4358 | /// | |||
4359 | /// This is not just a cleanup: the always_inline pass requires direct calls to | |||
4360 | /// functions to be able to inline them. If there is a bitcast in the way, it | |||
4361 | /// won't inline them. Instcombine normally deletes these calls, but it isn't | |||
4362 | /// run at -O0. | |||
4363 | static void ReplaceUsesOfNonProtoTypeWithRealFunction(llvm::GlobalValue *Old, | |||
4364 | llvm::Function *NewFn) { | |||
4365 | // If we're redefining a global as a function, don't transform it. | |||
4366 | if (!isa<llvm::Function>(Old)) return; | |||
4367 | ||||
4368 | replaceUsesOfNonProtoConstant(Old, NewFn); | |||
4369 | } | |||
4370 | ||||
4371 | void CodeGenModule::HandleCXXStaticMemberVarInstantiation(VarDecl *VD) { | |||
4372 | auto DK = VD->isThisDeclarationADefinition(); | |||
4373 | if (DK == VarDecl::Definition && VD->hasAttr<DLLImportAttr>()) | |||
4374 | return; | |||
4375 | ||||
4376 | TemplateSpecializationKind TSK = VD->getTemplateSpecializationKind(); | |||
4377 | // If we have a definition, this might be a deferred decl. If the | |||
4378 | // instantiation is explicit, make sure we emit it at the end. | |||
4379 | if (VD->getDefinition() && TSK == TSK_ExplicitInstantiationDefinition) | |||
4380 | GetAddrOfGlobalVar(VD); | |||
4381 | ||||
4382 | EmitTopLevelDecl(VD); | |||
4383 | } | |||
4384 | ||||
4385 | void CodeGenModule::EmitGlobalFunctionDefinition(GlobalDecl GD, | |||
4386 | llvm::GlobalValue *GV) { | |||
4387 | // Check if this must be emitted as declare variant. | |||
4388 | if (LangOpts.OpenMP && OpenMPRuntime && | |||
4389 | OpenMPRuntime->emitDeclareVariant(GD, /*IsForDefinition=*/true)) | |||
4390 | return; | |||
4391 | ||||
4392 | const auto *D = cast<FunctionDecl>(GD.getDecl()); | |||
4393 | ||||
4394 | // Compute the function info and LLVM type. | |||
4395 | const CGFunctionInfo &FI = getTypes().arrangeGlobalDeclaration(GD); | |||
4396 | llvm::FunctionType *Ty = getTypes().GetFunctionType(FI); | |||
4397 | ||||
4398 | // Get or create the prototype for the function. | |||
4399 | if (!GV || (GV->getType()->getElementType() != Ty)) | |||
4400 | GV = cast<llvm::GlobalValue>(GetAddrOfFunction(GD, Ty, /*ForVTable=*/false, | |||
4401 | /*DontDefer=*/true, | |||
4402 | ForDefinition)); | |||
4403 | ||||
4404 | // Already emitted. | |||
4405 | if (!GV->isDeclaration()) | |||
4406 | return; | |||
4407 | ||||
4408 | // We need to set linkage and visibility on the function before | |||
4409 | // generating code for it because various parts of IR generation | |||
4410 | // want to propagate this information down (e.g. to local static | |||
4411 | // declarations). | |||
4412 | auto *Fn = cast<llvm::Function>(GV); | |||
4413 | setFunctionLinkage(GD, Fn); | |||
4414 | ||||
4415 | // FIXME: this is redundant with part of setFunctionDefinitionAttributes | |||
4416 | setGVProperties(Fn, GD); | |||
4417 | ||||
4418 | MaybeHandleStaticInExternC(D, Fn); | |||
4419 | ||||
4420 | ||||
4421 | maybeSetTrivialComdat(*D, *Fn); | |||
4422 | ||||
4423 | CodeGenFunction(*this).GenerateCode(D, Fn, FI); | |||
4424 | ||||
4425 | setNonAliasAttributes(GD, Fn); | |||
4426 | SetLLVMFunctionAttributesForDefinition(D, Fn); | |||
4427 | ||||
4428 | if (const ConstructorAttr *CA = D->getAttr<ConstructorAttr>()) | |||
4429 | AddGlobalCtor(Fn, CA->getPriority()); | |||
4430 | if (const DestructorAttr *DA = D->getAttr<DestructorAttr>()) | |||
4431 | AddGlobalDtor(Fn, DA->getPriority()); | |||
4432 | if (D->hasAttr<AnnotateAttr>()) | |||
4433 | AddGlobalAnnotations(D, Fn); | |||
4434 | } | |||
4435 | ||||
4436 | void CodeGenModule::EmitAliasDefinition(GlobalDecl GD) { | |||
4437 | const auto *D = cast<ValueDecl>(GD.getDecl()); | |||
4438 | const AliasAttr *AA = D->getAttr<AliasAttr>(); | |||
4439 | assert(AA && "Not an alias?")((AA && "Not an alias?") ? static_cast<void> (0 ) : __assert_fail ("AA && \"Not an alias?\"", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 4439, __PRETTY_FUNCTION__)); | |||
4440 | ||||
4441 | StringRef MangledName = getMangledName(GD); | |||
4442 | ||||
4443 | if (AA->getAliasee() == MangledName) { | |||
4444 | Diags.Report(AA->getLocation(), diag::err_cyclic_alias) << 0; | |||
4445 | return; | |||
4446 | } | |||
4447 | ||||
4448 | // If there is a definition in the module, then it wins over the alias. | |||
4449 | // This is dubious, but allow it to be safe. Just ignore the alias. | |||
4450 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
4451 | if (Entry && !Entry->isDeclaration()) | |||
4452 | return; | |||
4453 | ||||
4454 | Aliases.push_back(GD); | |||
4455 | ||||
4456 | llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); | |||
4457 | ||||
4458 | // Create a reference to the named value. This ensures that it is emitted | |||
4459 | // if a deferred decl. | |||
4460 | llvm::Constant *Aliasee; | |||
4461 | llvm::GlobalValue::LinkageTypes LT; | |||
4462 | if (isa<llvm::FunctionType>(DeclTy)) { | |||
4463 | Aliasee = GetOrCreateLLVMFunction(AA->getAliasee(), DeclTy, GD, | |||
4464 | /*ForVTable=*/false); | |||
4465 | LT = getFunctionLinkage(GD); | |||
4466 | } else { | |||
4467 | Aliasee = GetOrCreateLLVMGlobal(AA->getAliasee(), | |||
4468 | llvm::PointerType::getUnqual(DeclTy), | |||
4469 | /*D=*/nullptr); | |||
4470 | LT = getLLVMLinkageVarDefinition(cast<VarDecl>(GD.getDecl()), | |||
4471 | D->getType().isConstQualified()); | |||
4472 | } | |||
4473 | ||||
4474 | // Create the new alias itself, but don't set a name yet. | |||
4475 | auto *GA = | |||
4476 | llvm::GlobalAlias::create(DeclTy, 0, LT, "", Aliasee, &getModule()); | |||
4477 | ||||
4478 | if (Entry) { | |||
4479 | if (GA->getAliasee() == Entry) { | |||
4480 | Diags.Report(AA->getLocation(), diag::err_cyclic_alias) << 0; | |||
4481 | return; | |||
4482 | } | |||
4483 | ||||
4484 | assert(Entry->isDeclaration())((Entry->isDeclaration()) ? static_cast<void> (0) : __assert_fail ("Entry->isDeclaration()", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 4484, __PRETTY_FUNCTION__)); | |||
4485 | ||||
4486 | // If there is a declaration in the module, then we had an extern followed | |||
4487 | // by the alias, as in: | |||
4488 | // extern int test6(); | |||
4489 | // ... | |||
4490 | // int test6() __attribute__((alias("test7"))); | |||
4491 | // | |||
4492 | // Remove it and replace uses of it with the alias. | |||
4493 | GA->takeName(Entry); | |||
4494 | ||||
4495 | Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GA, | |||
4496 | Entry->getType())); | |||
4497 | Entry->eraseFromParent(); | |||
4498 | } else { | |||
4499 | GA->setName(MangledName); | |||
4500 | } | |||
4501 | ||||
4502 | // Set attributes which are particular to an alias; this is a | |||
4503 | // specialization of the attributes which may be set on a global | |||
4504 | // variable/function. | |||
4505 | if (D->hasAttr<WeakAttr>() || D->hasAttr<WeakRefAttr>() || | |||
4506 | D->isWeakImported()) { | |||
4507 | GA->setLinkage(llvm::Function::WeakAnyLinkage); | |||
4508 | } | |||
4509 | ||||
4510 | if (const auto *VD = dyn_cast<VarDecl>(D)) | |||
4511 | if (VD->getTLSKind()) | |||
4512 | setTLSMode(GA, *VD); | |||
4513 | ||||
4514 | SetCommonAttributes(GD, GA); | |||
4515 | } | |||
4516 | ||||
4517 | void CodeGenModule::emitIFuncDefinition(GlobalDecl GD) { | |||
4518 | const auto *D = cast<ValueDecl>(GD.getDecl()); | |||
4519 | const IFuncAttr *IFA = D->getAttr<IFuncAttr>(); | |||
4520 | assert(IFA && "Not an ifunc?")((IFA && "Not an ifunc?") ? static_cast<void> ( 0) : __assert_fail ("IFA && \"Not an ifunc?\"", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 4520, __PRETTY_FUNCTION__)); | |||
4521 | ||||
4522 | StringRef MangledName = getMangledName(GD); | |||
4523 | ||||
4524 | if (IFA->getResolver() == MangledName) { | |||
4525 | Diags.Report(IFA->getLocation(), diag::err_cyclic_alias) << 1; | |||
4526 | return; | |||
4527 | } | |||
4528 | ||||
4529 | // Report an error if some definition overrides ifunc. | |||
4530 | llvm::GlobalValue *Entry = GetGlobalValue(MangledName); | |||
4531 | if (Entry && !Entry->isDeclaration()) { | |||
4532 | GlobalDecl OtherGD; | |||
4533 | if (lookupRepresentativeDecl(MangledName, OtherGD) && | |||
4534 | DiagnosedConflictingDefinitions.insert(GD).second) { | |||
4535 | Diags.Report(D->getLocation(), diag::err_duplicate_mangled_name) | |||
4536 | << MangledName; | |||
4537 | Diags.Report(OtherGD.getDecl()->getLocation(), | |||
4538 | diag::note_previous_definition); | |||
4539 | } | |||
4540 | return; | |||
4541 | } | |||
4542 | ||||
4543 | Aliases.push_back(GD); | |||
4544 | ||||
4545 | llvm::Type *DeclTy = getTypes().ConvertTypeForMem(D->getType()); | |||
4546 | llvm::Constant *Resolver = | |||
4547 | GetOrCreateLLVMFunction(IFA->getResolver(), DeclTy, GD, | |||
4548 | /*ForVTable=*/false); | |||
4549 | llvm::GlobalIFunc *GIF = | |||
4550 | llvm::GlobalIFunc::create(DeclTy, 0, llvm::Function::ExternalLinkage, | |||
4551 | "", Resolver, &getModule()); | |||
4552 | if (Entry) { | |||
4553 | if (GIF->getResolver() == Entry) { | |||
4554 | Diags.Report(IFA->getLocation(), diag::err_cyclic_alias) << 1; | |||
4555 | return; | |||
4556 | } | |||
4557 | assert(Entry->isDeclaration())((Entry->isDeclaration()) ? static_cast<void> (0) : __assert_fail ("Entry->isDeclaration()", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 4557, __PRETTY_FUNCTION__)); | |||
4558 | ||||
4559 | // If there is a declaration in the module, then we had an extern followed | |||
4560 | // by the ifunc, as in: | |||
4561 | // extern int test(); | |||
4562 | // ... | |||
4563 | // int test() __attribute__((ifunc("resolver"))); | |||
4564 | // | |||
4565 | // Remove it and replace uses of it with the ifunc. | |||
4566 | GIF->takeName(Entry); | |||
4567 | ||||
4568 | Entry->replaceAllUsesWith(llvm::ConstantExpr::getBitCast(GIF, | |||
4569 | Entry->getType())); | |||
4570 | Entry->eraseFromParent(); | |||
4571 | } else | |||
4572 | GIF->setName(MangledName); | |||
4573 | ||||
4574 | SetCommonAttributes(GD, GIF); | |||
4575 | } | |||
4576 | ||||
4577 | llvm::Function *CodeGenModule::getIntrinsic(unsigned IID, | |||
4578 | ArrayRef<llvm::Type*> Tys) { | |||
4579 | return llvm::Intrinsic::getDeclaration(&getModule(), (llvm::Intrinsic::ID)IID, | |||
4580 | Tys); | |||
4581 | } | |||
4582 | ||||
4583 | static llvm::StringMapEntry<llvm::GlobalVariable *> & | |||
4584 | GetConstantCFStringEntry(llvm::StringMap<llvm::GlobalVariable *> &Map, | |||
4585 | const StringLiteral *Literal, bool TargetIsLSB, | |||
4586 | bool &IsUTF16, unsigned &StringLength) { | |||
4587 | StringRef String = Literal->getString(); | |||
4588 | unsigned NumBytes = String.size(); | |||
4589 | ||||
4590 | // Check for simple case. | |||
4591 | if (!Literal->containsNonAsciiOrNull()) { | |||
4592 | StringLength = NumBytes; | |||
4593 | return *Map.insert(std::make_pair(String, nullptr)).first; | |||
4594 | } | |||
4595 | ||||
4596 | // Otherwise, convert the UTF8 literals into a string of shorts. | |||
4597 | IsUTF16 = true; | |||
4598 | ||||
4599 | SmallVector<llvm::UTF16, 128> ToBuf(NumBytes + 1); // +1 for ending nulls. | |||
4600 | const llvm::UTF8 *FromPtr = (const llvm::UTF8 *)String.data(); | |||
4601 | llvm::UTF16 *ToPtr = &ToBuf[0]; | |||
4602 | ||||
4603 | (void)llvm::ConvertUTF8toUTF16(&FromPtr, FromPtr + NumBytes, &ToPtr, | |||
4604 | ToPtr + NumBytes, llvm::strictConversion); | |||
4605 | ||||
4606 | // ConvertUTF8toUTF16 returns the length in ToPtr. | |||
4607 | StringLength = ToPtr - &ToBuf[0]; | |||
4608 | ||||
4609 | // Add an explicit null. | |||
4610 | *ToPtr = 0; | |||
4611 | return *Map.insert(std::make_pair( | |||
4612 | StringRef(reinterpret_cast<const char *>(ToBuf.data()), | |||
4613 | (StringLength + 1) * 2), | |||
4614 | nullptr)).first; | |||
4615 | } | |||
4616 | ||||
4617 | ConstantAddress | |||
4618 | CodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) { | |||
4619 | unsigned StringLength = 0; | |||
4620 | bool isUTF16 = false; | |||
4621 | llvm::StringMapEntry<llvm::GlobalVariable *> &Entry = | |||
4622 | GetConstantCFStringEntry(CFConstantStringMap, Literal, | |||
4623 | getDataLayout().isLittleEndian(), isUTF16, | |||
4624 | StringLength); | |||
4625 | ||||
4626 | if (auto *C = Entry.second) | |||
4627 | return ConstantAddress(C, CharUnits::fromQuantity(C->getAlignment())); | |||
4628 | ||||
4629 | llvm::Constant *Zero = llvm::Constant::getNullValue(Int32Ty); | |||
4630 | llvm::Constant *Zeros[] = { Zero, Zero }; | |||
4631 | ||||
4632 | const ASTContext &Context = getContext(); | |||
4633 | const llvm::Triple &Triple = getTriple(); | |||
4634 | ||||
4635 | const auto CFRuntime = getLangOpts().CFRuntime; | |||
4636 | const bool IsSwiftABI = | |||
4637 | static_cast<unsigned>(CFRuntime) >= | |||
4638 | static_cast<unsigned>(LangOptions::CoreFoundationABI::Swift); | |||
4639 | const bool IsSwift4_1 = CFRuntime == LangOptions::CoreFoundationABI::Swift4_1; | |||
4640 | ||||
4641 | // If we don't already have it, get __CFConstantStringClassReference. | |||
4642 | if (!CFConstantStringClassRef) { | |||
4643 | const char *CFConstantStringClassName = "__CFConstantStringClassReference"; | |||
4644 | llvm::Type *Ty = getTypes().ConvertType(getContext().IntTy); | |||
4645 | Ty = llvm::ArrayType::get(Ty, 0); | |||
4646 | ||||
4647 | switch (CFRuntime) { | |||
4648 | default: break; | |||
4649 | case LangOptions::CoreFoundationABI::Swift: LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
4650 | case LangOptions::CoreFoundationABI::Swift5_0: | |||
4651 | CFConstantStringClassName = | |||
4652 | Triple.isOSDarwin() ? "$s15SwiftFoundation19_NSCFConstantStringCN" | |||
4653 | : "$s10Foundation19_NSCFConstantStringCN"; | |||
4654 | Ty = IntPtrTy; | |||
4655 | break; | |||
4656 | case LangOptions::CoreFoundationABI::Swift4_2: | |||
4657 | CFConstantStringClassName = | |||
4658 | Triple.isOSDarwin() ? "$S15SwiftFoundation19_NSCFConstantStringCN" | |||
4659 | : "$S10Foundation19_NSCFConstantStringCN"; | |||
4660 | Ty = IntPtrTy; | |||
4661 | break; | |||
4662 | case LangOptions::CoreFoundationABI::Swift4_1: | |||
4663 | CFConstantStringClassName = | |||
4664 | Triple.isOSDarwin() ? "__T015SwiftFoundation19_NSCFConstantStringCN" | |||
4665 | : "__T010Foundation19_NSCFConstantStringCN"; | |||
4666 | Ty = IntPtrTy; | |||
4667 | break; | |||
4668 | } | |||
4669 | ||||
4670 | llvm::Constant *C = CreateRuntimeVariable(Ty, CFConstantStringClassName); | |||
4671 | ||||
4672 | if (Triple.isOSBinFormatELF() || Triple.isOSBinFormatCOFF()) { | |||
4673 | llvm::GlobalValue *GV = nullptr; | |||
4674 | ||||
4675 | if ((GV = dyn_cast<llvm::GlobalValue>(C))) { | |||
4676 | IdentifierInfo &II = Context.Idents.get(GV->getName()); | |||
4677 | TranslationUnitDecl *TUDecl = Context.getTranslationUnitDecl(); | |||
4678 | DeclContext *DC = TranslationUnitDecl::castToDeclContext(TUDecl); | |||
4679 | ||||
4680 | const VarDecl *VD = nullptr; | |||
4681 | for (const auto &Result : DC->lookup(&II)) | |||
4682 | if ((VD = dyn_cast<VarDecl>(Result))) | |||
4683 | break; | |||
4684 | ||||
4685 | if (Triple.isOSBinFormatELF()) { | |||
4686 | if (!VD) | |||
4687 | GV->setLinkage(llvm::GlobalValue::ExternalLinkage); | |||
4688 | } else { | |||
4689 | GV->setLinkage(llvm::GlobalValue::ExternalLinkage); | |||
4690 | if (!VD || !VD->hasAttr<DLLExportAttr>()) | |||
4691 | GV->setDLLStorageClass(llvm::GlobalValue::DLLImportStorageClass); | |||
4692 | else | |||
4693 | GV->setDLLStorageClass(llvm::GlobalValue::DLLExportStorageClass); | |||
4694 | } | |||
4695 | ||||
4696 | setDSOLocal(GV); | |||
4697 | } | |||
4698 | } | |||
4699 | ||||
4700 | // Decay array -> ptr | |||
4701 | CFConstantStringClassRef = | |||
4702 | IsSwiftABI ? llvm::ConstantExpr::getPtrToInt(C, Ty) | |||
4703 | : llvm::ConstantExpr::getGetElementPtr(Ty, C, Zeros); | |||
4704 | } | |||
4705 | ||||
4706 | QualType CFTy = Context.getCFConstantStringType(); | |||
4707 | ||||
4708 | auto *STy = cast<llvm::StructType>(getTypes().ConvertType(CFTy)); | |||
4709 | ||||
4710 | ConstantInitBuilder Builder(*this); | |||
4711 | auto Fields = Builder.beginStruct(STy); | |||
4712 | ||||
4713 | // Class pointer. | |||
4714 | Fields.add(cast<llvm::ConstantExpr>(CFConstantStringClassRef)); | |||
4715 | ||||
4716 | // Flags. | |||
4717 | if (IsSwiftABI) { | |||
4718 | Fields.addInt(IntPtrTy, IsSwift4_1 ? 0x05 : 0x01); | |||
4719 | Fields.addInt(Int64Ty, isUTF16 ? 0x07d0 : 0x07c8); | |||
4720 | } else { | |||
4721 | Fields.addInt(IntTy, isUTF16 ? 0x07d0 : 0x07C8); | |||
4722 | } | |||
4723 | ||||
4724 | // String pointer. | |||
4725 | llvm::Constant *C = nullptr; | |||
4726 | if (isUTF16) { | |||
4727 | auto Arr = llvm::makeArrayRef( | |||
4728 | reinterpret_cast<uint16_t *>(const_cast<char *>(Entry.first().data())), | |||
4729 | Entry.first().size() / 2); | |||
4730 | C = llvm::ConstantDataArray::get(VMContext, Arr); | |||
4731 | } else { | |||
4732 | C = llvm::ConstantDataArray::getString(VMContext, Entry.first()); | |||
4733 | } | |||
4734 | ||||
4735 | // Note: -fwritable-strings doesn't make the backing store strings of | |||
4736 | // CFStrings writable. (See <rdar://problem/10657500>) | |||
4737 | auto *GV = | |||
4738 | new llvm::GlobalVariable(getModule(), C->getType(), /*isConstant=*/true, | |||
4739 | llvm::GlobalValue::PrivateLinkage, C, ".str"); | |||
4740 | GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
4741 | // Don't enforce the target's minimum global alignment, since the only use | |||
4742 | // of the string is via this class initializer. | |||
4743 | CharUnits Align = isUTF16 ? Context.getTypeAlignInChars(Context.ShortTy) | |||
4744 | : Context.getTypeAlignInChars(Context.CharTy); | |||
4745 | GV->setAlignment(Align.getAsAlign()); | |||
4746 | ||||
4747 | // FIXME: We set the section explicitly to avoid a bug in ld64 224.1. | |||
4748 | // Without it LLVM can merge the string with a non unnamed_addr one during | |||
4749 | // LTO. Doing that changes the section it ends in, which surprises ld64. | |||
4750 | if (Triple.isOSBinFormatMachO()) | |||
4751 | GV->setSection(isUTF16 ? "__TEXT,__ustring" | |||
4752 | : "__TEXT,__cstring,cstring_literals"); | |||
4753 | // Make sure the literal ends up in .rodata to allow for safe ICF and for | |||
4754 | // the static linker to adjust permissions to read-only later on. | |||
4755 | else if (Triple.isOSBinFormatELF()) | |||
4756 | GV->setSection(".rodata"); | |||
4757 | ||||
4758 | // String. | |||
4759 | llvm::Constant *Str = | |||
4760 | llvm::ConstantExpr::getGetElementPtr(GV->getValueType(), GV, Zeros); | |||
4761 | ||||
4762 | if (isUTF16) | |||
4763 | // Cast the UTF16 string to the correct type. | |||
4764 | Str = llvm::ConstantExpr::getBitCast(Str, Int8PtrTy); | |||
4765 | Fields.add(Str); | |||
4766 | ||||
4767 | // String length. | |||
4768 | llvm::IntegerType *LengthTy = | |||
4769 | llvm::IntegerType::get(getModule().getContext(), | |||
4770 | Context.getTargetInfo().getLongWidth()); | |||
4771 | if (IsSwiftABI) { | |||
4772 | if (CFRuntime == LangOptions::CoreFoundationABI::Swift4_1 || | |||
4773 | CFRuntime == LangOptions::CoreFoundationABI::Swift4_2) | |||
4774 | LengthTy = Int32Ty; | |||
4775 | else | |||
4776 | LengthTy = IntPtrTy; | |||
4777 | } | |||
4778 | Fields.addInt(LengthTy, StringLength); | |||
4779 | ||||
4780 | // Swift ABI requires 8-byte alignment to ensure that the _Atomic(uint64_t) is | |||
4781 | // properly aligned on 32-bit platforms. | |||
4782 | CharUnits Alignment = | |||
4783 | IsSwiftABI ? Context.toCharUnitsFromBits(64) : getPointerAlign(); | |||
4784 | ||||
4785 | // The struct. | |||
4786 | GV = Fields.finishAndCreateGlobal("_unnamed_cfstring_", Alignment, | |||
4787 | /*isConstant=*/false, | |||
4788 | llvm::GlobalVariable::PrivateLinkage); | |||
4789 | GV->addAttribute("objc_arc_inert"); | |||
4790 | switch (Triple.getObjectFormat()) { | |||
4791 | case llvm::Triple::UnknownObjectFormat: | |||
4792 | llvm_unreachable("unknown file format")::llvm::llvm_unreachable_internal("unknown file format", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 4792); | |||
4793 | case llvm::Triple::XCOFF: | |||
4794 | llvm_unreachable("XCOFF is not yet implemented")::llvm::llvm_unreachable_internal("XCOFF is not yet implemented" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 4794); | |||
4795 | case llvm::Triple::COFF: | |||
4796 | case llvm::Triple::ELF: | |||
4797 | case llvm::Triple::Wasm: | |||
4798 | GV->setSection("cfstring"); | |||
4799 | break; | |||
4800 | case llvm::Triple::MachO: | |||
4801 | GV->setSection("__DATA,__cfstring"); | |||
4802 | break; | |||
4803 | } | |||
4804 | Entry.second = GV; | |||
4805 | ||||
4806 | return ConstantAddress(GV, Alignment); | |||
4807 | } | |||
4808 | ||||
4809 | bool CodeGenModule::getExpressionLocationsEnabled() const { | |||
4810 | return !CodeGenOpts.EmitCodeView || CodeGenOpts.DebugColumnInfo; | |||
4811 | } | |||
4812 | ||||
4813 | QualType CodeGenModule::getObjCFastEnumerationStateType() { | |||
4814 | if (ObjCFastEnumerationStateType.isNull()) { | |||
4815 | RecordDecl *D = Context.buildImplicitRecord("__objcFastEnumerationState"); | |||
4816 | D->startDefinition(); | |||
4817 | ||||
4818 | QualType FieldTypes[] = { | |||
4819 | Context.UnsignedLongTy, | |||
4820 | Context.getPointerType(Context.getObjCIdType()), | |||
4821 | Context.getPointerType(Context.UnsignedLongTy), | |||
4822 | Context.getConstantArrayType(Context.UnsignedLongTy, | |||
4823 | llvm::APInt(32, 5), nullptr, ArrayType::Normal, 0) | |||
4824 | }; | |||
4825 | ||||
4826 | for (size_t i = 0; i < 4; ++i) { | |||
4827 | FieldDecl *Field = FieldDecl::Create(Context, | |||
4828 | D, | |||
4829 | SourceLocation(), | |||
4830 | SourceLocation(), nullptr, | |||
4831 | FieldTypes[i], /*TInfo=*/nullptr, | |||
4832 | /*BitWidth=*/nullptr, | |||
4833 | /*Mutable=*/false, | |||
4834 | ICIS_NoInit); | |||
4835 | Field->setAccess(AS_public); | |||
4836 | D->addDecl(Field); | |||
4837 | } | |||
4838 | ||||
4839 | D->completeDefinition(); | |||
4840 | ObjCFastEnumerationStateType = Context.getTagDeclType(D); | |||
4841 | } | |||
4842 | ||||
4843 | return ObjCFastEnumerationStateType; | |||
4844 | } | |||
4845 | ||||
4846 | llvm::Constant * | |||
4847 | CodeGenModule::GetConstantArrayFromStringLiteral(const StringLiteral *E) { | |||
4848 | assert(!E->getType()->isPointerType() && "Strings are always arrays")((!E->getType()->isPointerType() && "Strings are always arrays" ) ? static_cast<void> (0) : __assert_fail ("!E->getType()->isPointerType() && \"Strings are always arrays\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 4848, __PRETTY_FUNCTION__)); | |||
4849 | ||||
4850 | // Don't emit it as the address of the string, emit the string data itself | |||
4851 | // as an inline array. | |||
4852 | if (E->getCharByteWidth() == 1) { | |||
4853 | SmallString<64> Str(E->getString()); | |||
4854 | ||||
4855 | // Resize the string to the right size, which is indicated by its type. | |||
4856 | const ConstantArrayType *CAT = Context.getAsConstantArrayType(E->getType()); | |||
4857 | Str.resize(CAT->getSize().getZExtValue()); | |||
4858 | return llvm::ConstantDataArray::getString(VMContext, Str, false); | |||
4859 | } | |||
4860 | ||||
4861 | auto *AType = cast<llvm::ArrayType>(getTypes().ConvertType(E->getType())); | |||
4862 | llvm::Type *ElemTy = AType->getElementType(); | |||
4863 | unsigned NumElements = AType->getNumElements(); | |||
4864 | ||||
4865 | // Wide strings have either 2-byte or 4-byte elements. | |||
4866 | if (ElemTy->getPrimitiveSizeInBits() == 16) { | |||
4867 | SmallVector<uint16_t, 32> Elements; | |||
4868 | Elements.reserve(NumElements); | |||
4869 | ||||
4870 | for(unsigned i = 0, e = E->getLength(); i != e; ++i) | |||
4871 | Elements.push_back(E->getCodeUnit(i)); | |||
4872 | Elements.resize(NumElements); | |||
4873 | return llvm::ConstantDataArray::get(VMContext, Elements); | |||
4874 | } | |||
4875 | ||||
4876 | assert(ElemTy->getPrimitiveSizeInBits() == 32)((ElemTy->getPrimitiveSizeInBits() == 32) ? static_cast< void> (0) : __assert_fail ("ElemTy->getPrimitiveSizeInBits() == 32" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 4876, __PRETTY_FUNCTION__)); | |||
4877 | SmallVector<uint32_t, 32> Elements; | |||
4878 | Elements.reserve(NumElements); | |||
4879 | ||||
4880 | for(unsigned i = 0, e = E->getLength(); i != e; ++i) | |||
4881 | Elements.push_back(E->getCodeUnit(i)); | |||
4882 | Elements.resize(NumElements); | |||
4883 | return llvm::ConstantDataArray::get(VMContext, Elements); | |||
4884 | } | |||
4885 | ||||
4886 | static llvm::GlobalVariable * | |||
4887 | GenerateStringLiteral(llvm::Constant *C, llvm::GlobalValue::LinkageTypes LT, | |||
4888 | CodeGenModule &CGM, StringRef GlobalName, | |||
4889 | CharUnits Alignment) { | |||
4890 | unsigned AddrSpace = CGM.getContext().getTargetAddressSpace( | |||
4891 | CGM.getStringLiteralAddressSpace()); | |||
4892 | ||||
4893 | llvm::Module &M = CGM.getModule(); | |||
4894 | // Create a global variable for this string | |||
4895 | auto *GV = new llvm::GlobalVariable( | |||
4896 | M, C->getType(), !CGM.getLangOpts().WritableStrings, LT, C, GlobalName, | |||
4897 | nullptr, llvm::GlobalVariable::NotThreadLocal, AddrSpace); | |||
4898 | GV->setAlignment(Alignment.getAsAlign()); | |||
4899 | GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); | |||
4900 | if (GV->isWeakForLinker()) { | |||
4901 | assert(CGM.supportsCOMDAT() && "Only COFF uses weak string literals")((CGM.supportsCOMDAT() && "Only COFF uses weak string literals" ) ? static_cast<void> (0) : __assert_fail ("CGM.supportsCOMDAT() && \"Only COFF uses weak string literals\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 4901, __PRETTY_FUNCTION__)); | |||
4902 | GV->setComdat(M.getOrInsertComdat(GV->getName())); | |||
4903 | } | |||
4904 | CGM.setDSOLocal(GV); | |||
4905 | ||||
4906 | return GV; | |||
4907 | } | |||
4908 | ||||
4909 | /// GetAddrOfConstantStringFromLiteral - Return a pointer to a | |||
4910 | /// constant array for the given string literal. | |||
4911 | ConstantAddress | |||
4912 | CodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S, | |||
4913 | StringRef Name) { | |||
4914 | CharUnits Alignment = getContext().getAlignOfGlobalVarInChars(S->getType()); | |||
4915 | ||||
4916 | llvm::Constant *C = GetConstantArrayFromStringLiteral(S); | |||
4917 | llvm::GlobalVariable **Entry = nullptr; | |||
4918 | if (!LangOpts.WritableStrings) { | |||
4919 | Entry = &ConstantStringMap[C]; | |||
4920 | if (auto GV = *Entry) { | |||
4921 | if (Alignment.getQuantity() > GV->getAlignment()) | |||
4922 | GV->setAlignment(Alignment.getAsAlign()); | |||
4923 | return ConstantAddress(castStringLiteralToDefaultAddressSpace(*this, GV), | |||
4924 | Alignment); | |||
4925 | } | |||
4926 | } | |||
4927 | ||||
4928 | SmallString<256> MangledNameBuffer; | |||
4929 | StringRef GlobalVariableName; | |||
4930 | llvm::GlobalValue::LinkageTypes LT; | |||
4931 | ||||
4932 | // Mangle the string literal if that's how the ABI merges duplicate strings. | |||
4933 | // Don't do it if they are writable, since we don't want writes in one TU to | |||
4934 | // affect strings in another. | |||
4935 | if (getCXXABI().getMangleContext().shouldMangleStringLiteral(S) && | |||
4936 | !LangOpts.WritableStrings) { | |||
4937 | llvm::raw_svector_ostream Out(MangledNameBuffer); | |||
4938 | getCXXABI().getMangleContext().mangleStringLiteral(S, Out); | |||
4939 | LT = llvm::GlobalValue::LinkOnceODRLinkage; | |||
4940 | GlobalVariableName = MangledNameBuffer; | |||
4941 | } else { | |||
4942 | LT = llvm::GlobalValue::PrivateLinkage; | |||
4943 | GlobalVariableName = Name; | |||
4944 | } | |||
4945 | ||||
4946 | auto GV = GenerateStringLiteral(C, LT, *this, GlobalVariableName, Alignment); | |||
4947 | if (Entry) | |||
4948 | *Entry = GV; | |||
4949 | ||||
4950 | SanitizerMD->reportGlobalToASan(GV, S->getStrTokenLoc(0), "<string literal>", | |||
4951 | QualType()); | |||
4952 | ||||
4953 | return ConstantAddress(castStringLiteralToDefaultAddressSpace(*this, GV), | |||
4954 | Alignment); | |||
4955 | } | |||
4956 | ||||
4957 | /// GetAddrOfConstantStringFromObjCEncode - Return a pointer to a constant | |||
4958 | /// array for the given ObjCEncodeExpr node. | |||
4959 | ConstantAddress | |||
4960 | CodeGenModule::GetAddrOfConstantStringFromObjCEncode(const ObjCEncodeExpr *E) { | |||
4961 | std::string Str; | |||
4962 | getContext().getObjCEncodingForType(E->getEncodedType(), Str); | |||
4963 | ||||
4964 | return GetAddrOfConstantCString(Str); | |||
4965 | } | |||
4966 | ||||
4967 | /// GetAddrOfConstantCString - Returns a pointer to a character array containing | |||
4968 | /// the literal and a terminating '\0' character. | |||
4969 | /// The result has pointer to array type. | |||
4970 | ConstantAddress CodeGenModule::GetAddrOfConstantCString( | |||
4971 | const std::string &Str, const char *GlobalName) { | |||
4972 | StringRef StrWithNull(Str.c_str(), Str.size() + 1); | |||
4973 | CharUnits Alignment = | |||
4974 | getContext().getAlignOfGlobalVarInChars(getContext().CharTy); | |||
4975 | ||||
4976 | llvm::Constant *C = | |||
4977 | llvm::ConstantDataArray::getString(getLLVMContext(), StrWithNull, false); | |||
4978 | ||||
4979 | // Don't share any string literals if strings aren't constant. | |||
4980 | llvm::GlobalVariable **Entry = nullptr; | |||
4981 | if (!LangOpts.WritableStrings) { | |||
4982 | Entry = &ConstantStringMap[C]; | |||
4983 | if (auto GV = *Entry) { | |||
4984 | if (Alignment.getQuantity() > GV->getAlignment()) | |||
4985 | GV->setAlignment(Alignment.getAsAlign()); | |||
4986 | return ConstantAddress(castStringLiteralToDefaultAddressSpace(*this, GV), | |||
4987 | Alignment); | |||
4988 | } | |||
4989 | } | |||
4990 | ||||
4991 | // Get the default prefix if a name wasn't specified. | |||
4992 | if (!GlobalName) | |||
4993 | GlobalName = ".str"; | |||
4994 | // Create a global variable for this. | |||
4995 | auto GV = GenerateStringLiteral(C, llvm::GlobalValue::PrivateLinkage, *this, | |||
4996 | GlobalName, Alignment); | |||
4997 | if (Entry) | |||
4998 | *Entry = GV; | |||
4999 | ||||
5000 | return ConstantAddress(castStringLiteralToDefaultAddressSpace(*this, GV), | |||
5001 | Alignment); | |||
5002 | } | |||
5003 | ||||
5004 | ConstantAddress CodeGenModule::GetAddrOfGlobalTemporary( | |||
5005 | const MaterializeTemporaryExpr *E, const Expr *Init) { | |||
5006 | assert((E->getStorageDuration() == SD_Static ||(((E->getStorageDuration() == SD_Static || E->getStorageDuration () == SD_Thread) && "not a global temporary") ? static_cast <void> (0) : __assert_fail ("(E->getStorageDuration() == SD_Static || E->getStorageDuration() == SD_Thread) && \"not a global temporary\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 5007, __PRETTY_FUNCTION__)) | |||
5007 | E->getStorageDuration() == SD_Thread) && "not a global temporary")(((E->getStorageDuration() == SD_Static || E->getStorageDuration () == SD_Thread) && "not a global temporary") ? static_cast <void> (0) : __assert_fail ("(E->getStorageDuration() == SD_Static || E->getStorageDuration() == SD_Thread) && \"not a global temporary\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 5007, __PRETTY_FUNCTION__)); | |||
5008 | const auto *VD = cast<VarDecl>(E->getExtendingDecl()); | |||
5009 | ||||
5010 | // If we're not materializing a subobject of the temporary, keep the | |||
5011 | // cv-qualifiers from the type of the MaterializeTemporaryExpr. | |||
5012 | QualType MaterializedType = Init->getType(); | |||
5013 | if (Init == E->GetTemporaryExpr()) | |||
5014 | MaterializedType = E->getType(); | |||
5015 | ||||
5016 | CharUnits Align = getContext().getTypeAlignInChars(MaterializedType); | |||
5017 | ||||
5018 | if (llvm::Constant *Slot = MaterializedGlobalTemporaryMap[E]) | |||
5019 | return ConstantAddress(Slot, Align); | |||
5020 | ||||
5021 | // FIXME: If an externally-visible declaration extends multiple temporaries, | |||
5022 | // we need to give each temporary the same name in every translation unit (and | |||
5023 | // we also need to make the temporaries externally-visible). | |||
5024 | SmallString<256> Name; | |||
5025 | llvm::raw_svector_ostream Out(Name); | |||
5026 | getCXXABI().getMangleContext().mangleReferenceTemporary( | |||
5027 | VD, E->getManglingNumber(), Out); | |||
5028 | ||||
5029 | APValue *Value = nullptr; | |||
5030 | if (E->getStorageDuration() == SD_Static && VD && VD->evaluateValue()) { | |||
5031 | // If the initializer of the extending declaration is a constant | |||
5032 | // initializer, we should have a cached constant initializer for this | |||
5033 | // temporary. Note that this might have a different value from the value | |||
5034 | // computed by evaluating the initializer if the surrounding constant | |||
5035 | // expression modifies the temporary. | |||
5036 | Value = getContext().getMaterializedTemporaryValue(E, false); | |||
5037 | } | |||
5038 | ||||
5039 | // Try evaluating it now, it might have a constant initializer. | |||
5040 | Expr::EvalResult EvalResult; | |||
5041 | if (!Value && Init->EvaluateAsRValue(EvalResult, getContext()) && | |||
5042 | !EvalResult.hasSideEffects()) | |||
5043 | Value = &EvalResult.Val; | |||
5044 | ||||
5045 | LangAS AddrSpace = | |||
5046 | VD ? GetGlobalVarAddressSpace(VD) : MaterializedType.getAddressSpace(); | |||
5047 | ||||
5048 | Optional<ConstantEmitter> emitter; | |||
5049 | llvm::Constant *InitialValue = nullptr; | |||
5050 | bool Constant = false; | |||
5051 | llvm::Type *Type; | |||
5052 | if (Value) { | |||
5053 | // The temporary has a constant initializer, use it. | |||
5054 | emitter.emplace(*this); | |||
5055 | InitialValue = emitter->emitForInitializer(*Value, AddrSpace, | |||
5056 | MaterializedType); | |||
5057 | Constant = isTypeConstant(MaterializedType, /*ExcludeCtor*/Value); | |||
5058 | Type = InitialValue->getType(); | |||
5059 | } else { | |||
5060 | // No initializer, the initialization will be provided when we | |||
5061 | // initialize the declaration which performed lifetime extension. | |||
5062 | Type = getTypes().ConvertTypeForMem(MaterializedType); | |||
5063 | } | |||
5064 | ||||
5065 | // Create a global variable for this lifetime-extended temporary. | |||
5066 | llvm::GlobalValue::LinkageTypes Linkage = | |||
5067 | getLLVMLinkageVarDefinition(VD, Constant); | |||
5068 | if (Linkage == llvm::GlobalVariable::ExternalLinkage) { | |||
5069 | const VarDecl *InitVD; | |||
5070 | if (VD->isStaticDataMember() && VD->getAnyInitializer(InitVD) && | |||
5071 | isa<CXXRecordDecl>(InitVD->getLexicalDeclContext())) { | |||
5072 | // Temporaries defined inside a class get linkonce_odr linkage because the | |||
5073 | // class can be defined in multiple translation units. | |||
5074 | Linkage = llvm::GlobalVariable::LinkOnceODRLinkage; | |||
5075 | } else { | |||
5076 | // There is no need for this temporary to have external linkage if the | |||
5077 | // VarDecl has external linkage. | |||
5078 | Linkage = llvm::GlobalVariable::InternalLinkage; | |||
5079 | } | |||
5080 | } | |||
5081 | auto TargetAS = getContext().getTargetAddressSpace(AddrSpace); | |||
5082 | auto *GV = new llvm::GlobalVariable( | |||
5083 | getModule(), Type, Constant, Linkage, InitialValue, Name.c_str(), | |||
5084 | /*InsertBefore=*/nullptr, llvm::GlobalVariable::NotThreadLocal, TargetAS); | |||
5085 | if (emitter) emitter->finalize(GV); | |||
5086 | setGVProperties(GV, VD); | |||
5087 | GV->setAlignment(Align.getAsAlign()); | |||
5088 | if (supportsCOMDAT() && GV->isWeakForLinker()) | |||
5089 | GV->setComdat(TheModule.getOrInsertComdat(GV->getName())); | |||
5090 | if (VD->getTLSKind()) | |||
5091 | setTLSMode(GV, *VD); | |||
5092 | llvm::Constant *CV = GV; | |||
5093 | if (AddrSpace != LangAS::Default) | |||
5094 | CV = getTargetCodeGenInfo().performAddrSpaceCast( | |||
5095 | *this, GV, AddrSpace, LangAS::Default, | |||
5096 | Type->getPointerTo( | |||
5097 | getContext().getTargetAddressSpace(LangAS::Default))); | |||
5098 | MaterializedGlobalTemporaryMap[E] = CV; | |||
5099 | return ConstantAddress(CV, Align); | |||
5100 | } | |||
5101 | ||||
5102 | /// EmitObjCPropertyImplementations - Emit information for synthesized | |||
5103 | /// properties for an implementation. | |||
5104 | void CodeGenModule::EmitObjCPropertyImplementations(const | |||
5105 | ObjCImplementationDecl *D) { | |||
5106 | for (const auto *PID : D->property_impls()) { | |||
5107 | // Dynamic is just for type-checking. | |||
5108 | if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { | |||
5109 | ObjCPropertyDecl *PD = PID->getPropertyDecl(); | |||
5110 | ||||
5111 | // Determine which methods need to be implemented, some may have | |||
5112 | // been overridden. Note that ::isPropertyAccessor is not the method | |||
5113 | // we want, that just indicates if the decl came from a | |||
5114 | // property. What we want to know is if the method is defined in | |||
5115 | // this implementation. | |||
5116 | auto *Getter = PID->getGetterMethodDecl(); | |||
5117 | if (!Getter || Getter->isSynthesizedAccessorStub()) | |||
5118 | CodeGenFunction(*this).GenerateObjCGetter( | |||
5119 | const_cast<ObjCImplementationDecl *>(D), PID); | |||
5120 | auto *Setter = PID->getSetterMethodDecl(); | |||
5121 | if (!PD->isReadOnly() && (!Setter || Setter->isSynthesizedAccessorStub())) | |||
5122 | CodeGenFunction(*this).GenerateObjCSetter( | |||
5123 | const_cast<ObjCImplementationDecl *>(D), PID); | |||
5124 | } | |||
5125 | } | |||
5126 | } | |||
5127 | ||||
5128 | static bool needsDestructMethod(ObjCImplementationDecl *impl) { | |||
5129 | const ObjCInterfaceDecl *iface = impl->getClassInterface(); | |||
5130 | for (const ObjCIvarDecl *ivar = iface->all_declared_ivar_begin(); | |||
5131 | ivar; ivar = ivar->getNextIvar()) | |||
5132 | if (ivar->getType().isDestructedType()) | |||
5133 | return true; | |||
5134 | ||||
5135 | return false; | |||
5136 | } | |||
5137 | ||||
5138 | static bool AllTrivialInitializers(CodeGenModule &CGM, | |||
5139 | ObjCImplementationDecl *D) { | |||
5140 | CodeGenFunction CGF(CGM); | |||
5141 | for (ObjCImplementationDecl::init_iterator B = D->init_begin(), | |||
5142 | E = D->init_end(); B != E; ++B) { | |||
5143 | CXXCtorInitializer *CtorInitExp = *B; | |||
5144 | Expr *Init = CtorInitExp->getInit(); | |||
5145 | if (!CGF.isTrivialInitializer(Init)) | |||
5146 | return false; | |||
5147 | } | |||
5148 | return true; | |||
5149 | } | |||
5150 | ||||
5151 | /// EmitObjCIvarInitializations - Emit information for ivar initialization | |||
5152 | /// for an implementation. | |||
5153 | void CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) { | |||
5154 | // We might need a .cxx_destruct even if we don't have any ivar initializers. | |||
5155 | if (needsDestructMethod(D)) { | |||
5156 | IdentifierInfo *II = &getContext().Idents.get(".cxx_destruct"); | |||
5157 | Selector cxxSelector = getContext().Selectors.getSelector(0, &II); | |||
5158 | ObjCMethodDecl *DTORMethod = ObjCMethodDecl::Create( | |||
5159 | getContext(), D->getLocation(), D->getLocation(), cxxSelector, | |||
5160 | getContext().VoidTy, nullptr, D, | |||
5161 | /*isInstance=*/true, /*isVariadic=*/false, | |||
5162 | /*isPropertyAccessor=*/true, /*isSynthesizedAccessorStub=*/false, | |||
5163 | /*isImplicitlyDeclared=*/true, | |||
5164 | /*isDefined=*/false, ObjCMethodDecl::Required); | |||
5165 | D->addInstanceMethod(DTORMethod); | |||
5166 | CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false); | |||
5167 | D->setHasDestructors(true); | |||
5168 | } | |||
5169 | ||||
5170 | // If the implementation doesn't have any ivar initializers, we don't need | |||
5171 | // a .cxx_construct. | |||
5172 | if (D->getNumIvarInitializers() == 0 || | |||
5173 | AllTrivialInitializers(*this, D)) | |||
5174 | return; | |||
5175 | ||||
5176 | IdentifierInfo *II = &getContext().Idents.get(".cxx_construct"); | |||
5177 | Selector cxxSelector = getContext().Selectors.getSelector(0, &II); | |||
5178 | // The constructor returns 'self'. | |||
5179 | ObjCMethodDecl *CTORMethod = ObjCMethodDecl::Create( | |||
5180 | getContext(), D->getLocation(), D->getLocation(), cxxSelector, | |||
5181 | getContext().getObjCIdType(), nullptr, D, /*isInstance=*/true, | |||
5182 | /*isVariadic=*/false, | |||
5183 | /*isPropertyAccessor=*/true, /*isSynthesizedAccessorStub=*/false, | |||
5184 | /*isImplicitlyDeclared=*/true, | |||
5185 | /*isDefined=*/false, ObjCMethodDecl::Required); | |||
5186 | D->addInstanceMethod(CTORMethod); | |||
5187 | CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true); | |||
5188 | D->setHasNonZeroConstructors(true); | |||
5189 | } | |||
5190 | ||||
5191 | // EmitLinkageSpec - Emit all declarations in a linkage spec. | |||
5192 | void CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) { | |||
5193 | if (LSD->getLanguage() != LinkageSpecDecl::lang_c && | |||
5194 | LSD->getLanguage() != LinkageSpecDecl::lang_cxx && | |||
5195 | LSD->getLanguage() != LinkageSpecDecl::lang_cxx_11 && | |||
5196 | LSD->getLanguage() != LinkageSpecDecl::lang_cxx_14) { | |||
5197 | ErrorUnsupported(LSD, "linkage spec"); | |||
5198 | return; | |||
5199 | } | |||
5200 | ||||
5201 | EmitDeclContext(LSD); | |||
5202 | } | |||
5203 | ||||
5204 | void CodeGenModule::EmitDeclContext(const DeclContext *DC) { | |||
5205 | for (auto *I : DC->decls()) { | |||
5206 | // Unlike other DeclContexts, the contents of an ObjCImplDecl at TU scope | |||
5207 | // are themselves considered "top-level", so EmitTopLevelDecl on an | |||
5208 | // ObjCImplDecl does not recursively visit them. We need to do that in | |||
5209 | // case they're nested inside another construct (LinkageSpecDecl / | |||
5210 | // ExportDecl) that does stop them from being considered "top-level". | |||
5211 | if (auto *OID = dyn_cast<ObjCImplDecl>(I)) { | |||
5212 | for (auto *M : OID->methods()) | |||
5213 | EmitTopLevelDecl(M); | |||
5214 | } | |||
5215 | ||||
5216 | EmitTopLevelDecl(I); | |||
5217 | } | |||
5218 | } | |||
5219 | ||||
5220 | /// EmitTopLevelDecl - Emit code for a single top level declaration. | |||
5221 | void CodeGenModule::EmitTopLevelDecl(Decl *D) { | |||
5222 | // Ignore dependent declarations. | |||
5223 | if (D->isTemplated()) | |||
5224 | return; | |||
5225 | ||||
5226 | switch (D->getKind()) { | |||
5227 | case Decl::CXXConversion: | |||
5228 | case Decl::CXXMethod: | |||
5229 | case Decl::Function: | |||
5230 | EmitGlobal(cast<FunctionDecl>(D)); | |||
5231 | // Always provide some coverage mapping | |||
5232 | // even for the functions that aren't emitted. | |||
5233 | AddDeferredUnusedCoverageMapping(D); | |||
5234 | break; | |||
5235 | ||||
5236 | case Decl::CXXDeductionGuide: | |||
5237 | // Function-like, but does not result in code emission. | |||
5238 | break; | |||
5239 | ||||
5240 | case Decl::Var: | |||
5241 | case Decl::Decomposition: | |||
5242 | case Decl::VarTemplateSpecialization: | |||
5243 | EmitGlobal(cast<VarDecl>(D)); | |||
5244 | if (auto *DD = dyn_cast<DecompositionDecl>(D)) | |||
5245 | for (auto *B : DD->bindings()) | |||
5246 | if (auto *HD = B->getHoldingVar()) | |||
5247 | EmitGlobal(HD); | |||
5248 | break; | |||
5249 | ||||
5250 | // Indirect fields from global anonymous structs and unions can be | |||
5251 | // ignored; only the actual variable requires IR gen support. | |||
5252 | case Decl::IndirectField: | |||
5253 | break; | |||
5254 | ||||
5255 | // C++ Decls | |||
5256 | case Decl::Namespace: | |||
5257 | EmitDeclContext(cast<NamespaceDecl>(D)); | |||
5258 | break; | |||
5259 | case Decl::ClassTemplateSpecialization: { | |||
5260 | const auto *Spec = cast<ClassTemplateSpecializationDecl>(D); | |||
5261 | if (DebugInfo && | |||
5262 | Spec->getSpecializationKind() == TSK_ExplicitInstantiationDefinition && | |||
5263 | Spec->hasDefinition()) | |||
5264 | DebugInfo->completeTemplateDefinition(*Spec); | |||
5265 | } LLVM_FALLTHROUGH[[gnu::fallthrough]]; | |||
5266 | case Decl::CXXRecord: | |||
5267 | if (DebugInfo) { | |||
5268 | if (auto *ES = D->getASTContext().getExternalSource()) | |||
5269 | if (ES->hasExternalDefinitions(D) == ExternalASTSource::EK_Never) | |||
5270 | DebugInfo->completeUnusedClass(cast<CXXRecordDecl>(*D)); | |||
5271 | } | |||
5272 | // Emit any static data members, they may be definitions. | |||
5273 | for (auto *I : cast<CXXRecordDecl>(D)->decls()) | |||
5274 | if (isa<VarDecl>(I) || isa<CXXRecordDecl>(I)) | |||
5275 | EmitTopLevelDecl(I); | |||
5276 | break; | |||
5277 | // No code generation needed. | |||
5278 | case Decl::UsingShadow: | |||
5279 | case Decl::ClassTemplate: | |||
5280 | case Decl::VarTemplate: | |||
5281 | case Decl::Concept: | |||
5282 | case Decl::VarTemplatePartialSpecialization: | |||
5283 | case Decl::FunctionTemplate: | |||
5284 | case Decl::TypeAliasTemplate: | |||
5285 | case Decl::Block: | |||
5286 | case Decl::Empty: | |||
5287 | case Decl::Binding: | |||
5288 | break; | |||
5289 | case Decl::Using: // using X; [C++] | |||
5290 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5291 | DI->EmitUsingDecl(cast<UsingDecl>(*D)); | |||
5292 | return; | |||
5293 | case Decl::NamespaceAlias: | |||
5294 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5295 | DI->EmitNamespaceAlias(cast<NamespaceAliasDecl>(*D)); | |||
5296 | return; | |||
5297 | case Decl::UsingDirective: // using namespace X; [C++] | |||
5298 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5299 | DI->EmitUsingDirective(cast<UsingDirectiveDecl>(*D)); | |||
5300 | return; | |||
5301 | case Decl::CXXConstructor: | |||
5302 | getCXXABI().EmitCXXConstructors(cast<CXXConstructorDecl>(D)); | |||
5303 | break; | |||
5304 | case Decl::CXXDestructor: | |||
5305 | getCXXABI().EmitCXXDestructors(cast<CXXDestructorDecl>(D)); | |||
5306 | break; | |||
5307 | ||||
5308 | case Decl::StaticAssert: | |||
5309 | // Nothing to do. | |||
5310 | break; | |||
5311 | ||||
5312 | // Objective-C Decls | |||
5313 | ||||
5314 | // Forward declarations, no (immediate) code generation. | |||
5315 | case Decl::ObjCInterface: | |||
5316 | case Decl::ObjCCategory: | |||
5317 | break; | |||
5318 | ||||
5319 | case Decl::ObjCProtocol: { | |||
5320 | auto *Proto = cast<ObjCProtocolDecl>(D); | |||
5321 | if (Proto->isThisDeclarationADefinition()) | |||
5322 | ObjCRuntime->GenerateProtocol(Proto); | |||
5323 | break; | |||
5324 | } | |||
5325 | ||||
5326 | case Decl::ObjCCategoryImpl: | |||
5327 | // Categories have properties but don't support synthesize so we | |||
5328 | // can ignore them here. | |||
5329 | ObjCRuntime->GenerateCategory(cast<ObjCCategoryImplDecl>(D)); | |||
5330 | break; | |||
5331 | ||||
5332 | case Decl::ObjCImplementation: { | |||
5333 | auto *OMD = cast<ObjCImplementationDecl>(D); | |||
5334 | EmitObjCPropertyImplementations(OMD); | |||
5335 | EmitObjCIvarInitializations(OMD); | |||
5336 | ObjCRuntime->GenerateClass(OMD); | |||
5337 | // Emit global variable debug information. | |||
5338 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5339 | if (getCodeGenOpts().getDebugInfo() >= codegenoptions::LimitedDebugInfo) | |||
5340 | DI->getOrCreateInterfaceType(getContext().getObjCInterfaceType( | |||
5341 | OMD->getClassInterface()), OMD->getLocation()); | |||
5342 | break; | |||
5343 | } | |||
5344 | case Decl::ObjCMethod: { | |||
5345 | auto *OMD = cast<ObjCMethodDecl>(D); | |||
5346 | // If this is not a prototype, emit the body. | |||
5347 | if (OMD->getBody()) | |||
5348 | CodeGenFunction(*this).GenerateObjCMethod(OMD); | |||
5349 | break; | |||
5350 | } | |||
5351 | case Decl::ObjCCompatibleAlias: | |||
5352 | ObjCRuntime->RegisterAlias(cast<ObjCCompatibleAliasDecl>(D)); | |||
5353 | break; | |||
5354 | ||||
5355 | case Decl::PragmaComment: { | |||
5356 | const auto *PCD = cast<PragmaCommentDecl>(D); | |||
5357 | switch (PCD->getCommentKind()) { | |||
5358 | case PCK_Unknown: | |||
5359 | llvm_unreachable("unexpected pragma comment kind")::llvm::llvm_unreachable_internal("unexpected pragma comment kind" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 5359); | |||
5360 | case PCK_Linker: | |||
5361 | AppendLinkerOptions(PCD->getArg()); | |||
5362 | break; | |||
5363 | case PCK_Lib: | |||
5364 | AddDependentLib(PCD->getArg()); | |||
5365 | break; | |||
5366 | case PCK_Compiler: | |||
5367 | case PCK_ExeStr: | |||
5368 | case PCK_User: | |||
5369 | break; // We ignore all of these. | |||
5370 | } | |||
5371 | break; | |||
5372 | } | |||
5373 | ||||
5374 | case Decl::PragmaDetectMismatch: { | |||
5375 | const auto *PDMD = cast<PragmaDetectMismatchDecl>(D); | |||
5376 | AddDetectMismatch(PDMD->getName(), PDMD->getValue()); | |||
5377 | break; | |||
5378 | } | |||
5379 | ||||
5380 | case Decl::LinkageSpec: | |||
5381 | EmitLinkageSpec(cast<LinkageSpecDecl>(D)); | |||
5382 | break; | |||
5383 | ||||
5384 | case Decl::FileScopeAsm: { | |||
5385 | // File-scope asm is ignored during device-side CUDA compilation. | |||
5386 | if (LangOpts.CUDA && LangOpts.CUDAIsDevice) | |||
5387 | break; | |||
5388 | // File-scope asm is ignored during device-side OpenMP compilation. | |||
5389 | if (LangOpts.OpenMPIsDevice) | |||
5390 | break; | |||
5391 | auto *AD = cast<FileScopeAsmDecl>(D); | |||
5392 | getModule().appendModuleInlineAsm(AD->getAsmString()->getString()); | |||
5393 | break; | |||
5394 | } | |||
5395 | ||||
5396 | case Decl::Import: { | |||
5397 | auto *Import = cast<ImportDecl>(D); | |||
5398 | ||||
5399 | // If we've already imported this module, we're done. | |||
5400 | if (!ImportedModules.insert(Import->getImportedModule())) | |||
5401 | break; | |||
5402 | ||||
5403 | // Emit debug information for direct imports. | |||
5404 | if (!Import->getImportedOwningModule()) { | |||
5405 | if (CGDebugInfo *DI = getModuleDebugInfo()) | |||
5406 | DI->EmitImportDecl(*Import); | |||
5407 | } | |||
5408 | ||||
5409 | // Find all of the submodules and emit the module initializers. | |||
5410 | llvm::SmallPtrSet<clang::Module *, 16> Visited; | |||
5411 | SmallVector<clang::Module *, 16> Stack; | |||
5412 | Visited.insert(Import->getImportedModule()); | |||
5413 | Stack.push_back(Import->getImportedModule()); | |||
5414 | ||||
5415 | while (!Stack.empty()) { | |||
5416 | clang::Module *Mod = Stack.pop_back_val(); | |||
5417 | if (!EmittedModuleInitializers.insert(Mod).second) | |||
5418 | continue; | |||
5419 | ||||
5420 | for (auto *D : Context.getModuleInitializers(Mod)) | |||
5421 | EmitTopLevelDecl(D); | |||
5422 | ||||
5423 | // Visit the submodules of this module. | |||
5424 | for (clang::Module::submodule_iterator Sub = Mod->submodule_begin(), | |||
5425 | SubEnd = Mod->submodule_end(); | |||
5426 | Sub != SubEnd; ++Sub) { | |||
5427 | // Skip explicit children; they need to be explicitly imported to emit | |||
5428 | // the initializers. | |||
5429 | if ((*Sub)->IsExplicit) | |||
5430 | continue; | |||
5431 | ||||
5432 | if (Visited.insert(*Sub).second) | |||
5433 | Stack.push_back(*Sub); | |||
5434 | } | |||
5435 | } | |||
5436 | break; | |||
5437 | } | |||
5438 | ||||
5439 | case Decl::Export: | |||
5440 | EmitDeclContext(cast<ExportDecl>(D)); | |||
5441 | break; | |||
5442 | ||||
5443 | case Decl::OMPThreadPrivate: | |||
5444 | EmitOMPThreadPrivateDecl(cast<OMPThreadPrivateDecl>(D)); | |||
5445 | break; | |||
5446 | ||||
5447 | case Decl::OMPAllocate: | |||
5448 | break; | |||
5449 | ||||
5450 | case Decl::OMPDeclareReduction: | |||
5451 | EmitOMPDeclareReduction(cast<OMPDeclareReductionDecl>(D)); | |||
5452 | break; | |||
5453 | ||||
5454 | case Decl::OMPDeclareMapper: | |||
5455 | EmitOMPDeclareMapper(cast<OMPDeclareMapperDecl>(D)); | |||
5456 | break; | |||
5457 | ||||
5458 | case Decl::OMPRequires: | |||
5459 | EmitOMPRequiresDecl(cast<OMPRequiresDecl>(D)); | |||
5460 | break; | |||
5461 | ||||
5462 | default: | |||
5463 | // Make sure we handled everything we should, every other kind is a | |||
5464 | // non-top-level decl. FIXME: Would be nice to have an isTopLevelDeclKind | |||
5465 | // function. Need to recode Decl::Kind to do that easily. | |||
5466 | assert(isa<TypeDecl>(D) && "Unsupported decl kind")((isa<TypeDecl>(D) && "Unsupported decl kind") ? static_cast<void> (0) : __assert_fail ("isa<TypeDecl>(D) && \"Unsupported decl kind\"" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 5466, __PRETTY_FUNCTION__)); | |||
5467 | break; | |||
5468 | } | |||
5469 | } | |||
5470 | ||||
5471 | void CodeGenModule::AddDeferredUnusedCoverageMapping(Decl *D) { | |||
5472 | // Do we need to generate coverage mapping? | |||
5473 | if (!CodeGenOpts.CoverageMapping) | |||
5474 | return; | |||
5475 | switch (D->getKind()) { | |||
5476 | case Decl::CXXConversion: | |||
5477 | case Decl::CXXMethod: | |||
5478 | case Decl::Function: | |||
5479 | case Decl::ObjCMethod: | |||
5480 | case Decl::CXXConstructor: | |||
5481 | case Decl::CXXDestructor: { | |||
5482 | if (!cast<FunctionDecl>(D)->doesThisDeclarationHaveABody()) | |||
5483 | return; | |||
5484 | SourceManager &SM = getContext().getSourceManager(); | |||
5485 | if (LimitedCoverage && SM.getMainFileID() != SM.getFileID(D->getBeginLoc())) | |||
5486 | return; | |||
5487 | auto I = DeferredEmptyCoverageMappingDecls.find(D); | |||
5488 | if (I == DeferredEmptyCoverageMappingDecls.end()) | |||
5489 | DeferredEmptyCoverageMappingDecls[D] = true; | |||
5490 | break; | |||
5491 | } | |||
5492 | default: | |||
5493 | break; | |||
5494 | }; | |||
5495 | } | |||
5496 | ||||
5497 | void CodeGenModule::ClearUnusedCoverageMapping(const Decl *D) { | |||
5498 | // Do we need to generate coverage mapping? | |||
5499 | if (!CodeGenOpts.CoverageMapping) | |||
5500 | return; | |||
5501 | if (const auto *Fn = dyn_cast<FunctionDecl>(D)) { | |||
5502 | if (Fn->isTemplateInstantiation()) | |||
5503 | ClearUnusedCoverageMapping(Fn->getTemplateInstantiationPattern()); | |||
5504 | } | |||
5505 | auto I = DeferredEmptyCoverageMappingDecls.find(D); | |||
5506 | if (I == DeferredEmptyCoverageMappingDecls.end()) | |||
5507 | DeferredEmptyCoverageMappingDecls[D] = false; | |||
5508 | else | |||
5509 | I->second = false; | |||
5510 | } | |||
5511 | ||||
5512 | void CodeGenModule::EmitDeferredUnusedCoverageMappings() { | |||
5513 | // We call takeVector() here to avoid use-after-free. | |||
5514 | // FIXME: DeferredEmptyCoverageMappingDecls is getting mutated because | |||
5515 | // we deserialize function bodies to emit coverage info for them, and that | |||
5516 | // deserializes more declarations. How should we handle that case? | |||
5517 | for (const auto &Entry : DeferredEmptyCoverageMappingDecls.takeVector()) { | |||
5518 | if (!Entry.second) | |||
5519 | continue; | |||
5520 | const Decl *D = Entry.first; | |||
5521 | switch (D->getKind()) { | |||
5522 | case Decl::CXXConversion: | |||
5523 | case Decl::CXXMethod: | |||
5524 | case Decl::Function: | |||
5525 | case Decl::ObjCMethod: { | |||
5526 | CodeGenPGO PGO(*this); | |||
5527 | GlobalDecl GD(cast<FunctionDecl>(D)); | |||
5528 | PGO.emitEmptyCounterMapping(D, getMangledName(GD), | |||
5529 | getFunctionLinkage(GD)); | |||
5530 | break; | |||
5531 | } | |||
5532 | case Decl::CXXConstructor: { | |||
5533 | CodeGenPGO PGO(*this); | |||
5534 | GlobalDecl GD(cast<CXXConstructorDecl>(D), Ctor_Base); | |||
5535 | PGO.emitEmptyCounterMapping(D, getMangledName(GD), | |||
5536 | getFunctionLinkage(GD)); | |||
5537 | break; | |||
5538 | } | |||
5539 | case Decl::CXXDestructor: { | |||
5540 | CodeGenPGO PGO(*this); | |||
5541 | GlobalDecl GD(cast<CXXDestructorDecl>(D), Dtor_Base); | |||
5542 | PGO.emitEmptyCounterMapping(D, getMangledName(GD), | |||
5543 | getFunctionLinkage(GD)); | |||
5544 | break; | |||
5545 | } | |||
5546 | default: | |||
5547 | break; | |||
5548 | }; | |||
5549 | } | |||
5550 | } | |||
5551 | ||||
5552 | /// Turns the given pointer into a constant. | |||
5553 | static llvm::Constant *GetPointerConstant(llvm::LLVMContext &Context, | |||
5554 | const void *Ptr) { | |||
5555 | uintptr_t PtrInt = reinterpret_cast<uintptr_t>(Ptr); | |||
5556 | llvm::Type *i64 = llvm::Type::getInt64Ty(Context); | |||
5557 | return llvm::ConstantInt::get(i64, PtrInt); | |||
5558 | } | |||
5559 | ||||
5560 | static void EmitGlobalDeclMetadata(CodeGenModule &CGM, | |||
5561 | llvm::NamedMDNode *&GlobalMetadata, | |||
5562 | GlobalDecl D, | |||
5563 | llvm::GlobalValue *Addr) { | |||
5564 | if (!GlobalMetadata) | |||
5565 | GlobalMetadata = | |||
5566 | CGM.getModule().getOrInsertNamedMetadata("clang.global.decl.ptrs"); | |||
5567 | ||||
5568 | // TODO: should we report variant information for ctors/dtors? | |||
5569 | llvm::Metadata *Ops[] = {llvm::ConstantAsMetadata::get(Addr), | |||
5570 | llvm::ConstantAsMetadata::get(GetPointerConstant( | |||
5571 | CGM.getLLVMContext(), D.getDecl()))}; | |||
5572 | GlobalMetadata->addOperand(llvm::MDNode::get(CGM.getLLVMContext(), Ops)); | |||
5573 | } | |||
5574 | ||||
5575 | /// For each function which is declared within an extern "C" region and marked | |||
5576 | /// as 'used', but has internal linkage, create an alias from the unmangled | |||
5577 | /// name to the mangled name if possible. People expect to be able to refer | |||
5578 | /// to such functions with an unmangled name from inline assembly within the | |||
5579 | /// same translation unit. | |||
5580 | void CodeGenModule::EmitStaticExternCAliases() { | |||
5581 | if (!getTargetCodeGenInfo().shouldEmitStaticExternCAliases()) | |||
5582 | return; | |||
5583 | for (auto &I : StaticExternCValues) { | |||
5584 | IdentifierInfo *Name = I.first; | |||
5585 | llvm::GlobalValue *Val = I.second; | |||
5586 | if (Val && !getModule().getNamedValue(Name->getName())) | |||
5587 | addUsedGlobal(llvm::GlobalAlias::create(Name->getName(), Val)); | |||
5588 | } | |||
5589 | } | |||
5590 | ||||
5591 | bool CodeGenModule::lookupRepresentativeDecl(StringRef MangledName, | |||
5592 | GlobalDecl &Result) const { | |||
5593 | auto Res = Manglings.find(MangledName); | |||
5594 | if (Res == Manglings.end()) | |||
5595 | return false; | |||
5596 | Result = Res->getValue(); | |||
5597 | return true; | |||
5598 | } | |||
5599 | ||||
5600 | /// Emits metadata nodes associating all the global values in the | |||
5601 | /// current module with the Decls they came from. This is useful for | |||
5602 | /// projects using IR gen as a subroutine. | |||
5603 | /// | |||
5604 | /// Since there's currently no way to associate an MDNode directly | |||
5605 | /// with an llvm::GlobalValue, we create a global named metadata | |||
5606 | /// with the name 'clang.global.decl.ptrs'. | |||
5607 | void CodeGenModule::EmitDeclMetadata() { | |||
5608 | llvm::NamedMDNode *GlobalMetadata = nullptr; | |||
5609 | ||||
5610 | for (auto &I : MangledDeclNames) { | |||
5611 | llvm::GlobalValue *Addr = getModule().getNamedValue(I.second); | |||
5612 | // Some mangled names don't necessarily have an associated GlobalValue | |||
5613 | // in this module, e.g. if we mangled it for DebugInfo. | |||
5614 | if (Addr) | |||
5615 | EmitGlobalDeclMetadata(*this, GlobalMetadata, I.first, Addr); | |||
5616 | } | |||
5617 | } | |||
5618 | ||||
5619 | /// Emits metadata nodes for all the local variables in the current | |||
5620 | /// function. | |||
5621 | void CodeGenFunction::EmitDeclMetadata() { | |||
5622 | if (LocalDeclMap.empty()) return; | |||
5623 | ||||
5624 | llvm::LLVMContext &Context = getLLVMContext(); | |||
5625 | ||||
5626 | // Find the unique metadata ID for this name. | |||
5627 | unsigned DeclPtrKind = Context.getMDKindID("clang.decl.ptr"); | |||
5628 | ||||
5629 | llvm::NamedMDNode *GlobalMetadata = nullptr; | |||
5630 | ||||
5631 | for (auto &I : LocalDeclMap) { | |||
5632 | const Decl *D = I.first; | |||
5633 | llvm::Value *Addr = I.second.getPointer(); | |||
5634 | if (auto *Alloca = dyn_cast<llvm::AllocaInst>(Addr)) { | |||
5635 | llvm::Value *DAddr = GetPointerConstant(getLLVMContext(), D); | |||
5636 | Alloca->setMetadata( | |||
5637 | DeclPtrKind, llvm::MDNode::get( | |||
5638 | Context, llvm::ValueAsMetadata::getConstant(DAddr))); | |||
5639 | } else if (auto *GV = dyn_cast<llvm::GlobalValue>(Addr)) { | |||
5640 | GlobalDecl GD = GlobalDecl(cast<VarDecl>(D)); | |||
5641 | EmitGlobalDeclMetadata(CGM, GlobalMetadata, GD, GV); | |||
5642 | } | |||
5643 | } | |||
5644 | } | |||
5645 | ||||
5646 | void CodeGenModule::EmitVersionIdentMetadata() { | |||
5647 | llvm::NamedMDNode *IdentMetadata = | |||
5648 | TheModule.getOrInsertNamedMetadata("llvm.ident"); | |||
5649 | std::string Version = getClangFullVersion(); | |||
5650 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
5651 | ||||
5652 | llvm::Metadata *IdentNode[] = {llvm::MDString::get(Ctx, Version)}; | |||
5653 | IdentMetadata->addOperand(llvm::MDNode::get(Ctx, IdentNode)); | |||
5654 | } | |||
5655 | ||||
5656 | void CodeGenModule::EmitCommandLineMetadata() { | |||
5657 | llvm::NamedMDNode *CommandLineMetadata = | |||
5658 | TheModule.getOrInsertNamedMetadata("llvm.commandline"); | |||
5659 | std::string CommandLine = getCodeGenOpts().RecordCommandLine; | |||
5660 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
5661 | ||||
5662 | llvm::Metadata *CommandLineNode[] = {llvm::MDString::get(Ctx, CommandLine)}; | |||
5663 | CommandLineMetadata->addOperand(llvm::MDNode::get(Ctx, CommandLineNode)); | |||
5664 | } | |||
5665 | ||||
5666 | void CodeGenModule::EmitTargetMetadata() { | |||
5667 | // Warning, new MangledDeclNames may be appended within this loop. | |||
5668 | // We rely on MapVector insertions adding new elements to the end | |||
5669 | // of the container. | |||
5670 | // FIXME: Move this loop into the one target that needs it, and only | |||
5671 | // loop over those declarations for which we couldn't emit the target | |||
5672 | // metadata when we emitted the declaration. | |||
5673 | for (unsigned I = 0; I != MangledDeclNames.size(); ++I) { | |||
5674 | auto Val = *(MangledDeclNames.begin() + I); | |||
5675 | const Decl *D = Val.first.getDecl()->getMostRecentDecl(); | |||
5676 | llvm::GlobalValue *GV = GetGlobalValue(Val.second); | |||
5677 | getTargetCodeGenInfo().emitTargetMD(D, GV, *this); | |||
5678 | } | |||
5679 | } | |||
5680 | ||||
5681 | void CodeGenModule::EmitCoverageFile() { | |||
5682 | if (getCodeGenOpts().CoverageDataFile.empty() && | |||
5683 | getCodeGenOpts().CoverageNotesFile.empty()) | |||
5684 | return; | |||
5685 | ||||
5686 | llvm::NamedMDNode *CUNode = TheModule.getNamedMetadata("llvm.dbg.cu"); | |||
5687 | if (!CUNode) | |||
5688 | return; | |||
5689 | ||||
5690 | llvm::NamedMDNode *GCov = TheModule.getOrInsertNamedMetadata("llvm.gcov"); | |||
5691 | llvm::LLVMContext &Ctx = TheModule.getContext(); | |||
5692 | auto *CoverageDataFile = | |||
5693 | llvm::MDString::get(Ctx, getCodeGenOpts().CoverageDataFile); | |||
5694 | auto *CoverageNotesFile = | |||
5695 | llvm::MDString::get(Ctx, getCodeGenOpts().CoverageNotesFile); | |||
5696 | for (int i = 0, e = CUNode->getNumOperands(); i != e; ++i) { | |||
5697 | llvm::MDNode *CU = CUNode->getOperand(i); | |||
5698 | llvm::Metadata *Elts[] = {CoverageNotesFile, CoverageDataFile, CU}; | |||
5699 | GCov->addOperand(llvm::MDNode::get(Ctx, Elts)); | |||
5700 | } | |||
5701 | } | |||
5702 | ||||
5703 | llvm::Constant *CodeGenModule::EmitUuidofInitializer(StringRef Uuid) { | |||
5704 | // Sema has checked that all uuid strings are of the form | |||
5705 | // "12345678-1234-1234-1234-1234567890ab". | |||
5706 | assert(Uuid.size() == 36)((Uuid.size() == 36) ? static_cast<void> (0) : __assert_fail ("Uuid.size() == 36", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 5706, __PRETTY_FUNCTION__)); | |||
5707 | for (unsigned i = 0; i < 36; ++i) { | |||
5708 | if (i == 8 || i == 13 || i == 18 || i == 23) assert(Uuid[i] == '-')((Uuid[i] == '-') ? static_cast<void> (0) : __assert_fail ("Uuid[i] == '-'", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 5708, __PRETTY_FUNCTION__)); | |||
5709 | else assert(isHexDigit(Uuid[i]))((isHexDigit(Uuid[i])) ? static_cast<void> (0) : __assert_fail ("isHexDigit(Uuid[i])", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 5709, __PRETTY_FUNCTION__)); | |||
5710 | } | |||
5711 | ||||
5712 | // The starts of all bytes of Field3 in Uuid. Field 3 is "1234-1234567890ab". | |||
5713 | const unsigned Field3ValueOffsets[8] = { 19, 21, 24, 26, 28, 30, 32, 34 }; | |||
5714 | ||||
5715 | llvm::Constant *Field3[8]; | |||
5716 | for (unsigned Idx = 0; Idx < 8; ++Idx) | |||
5717 | Field3[Idx] = llvm::ConstantInt::get( | |||
5718 | Int8Ty, Uuid.substr(Field3ValueOffsets[Idx], 2), 16); | |||
5719 | ||||
5720 | llvm::Constant *Fields[4] = { | |||
5721 | llvm::ConstantInt::get(Int32Ty, Uuid.substr(0, 8), 16), | |||
5722 | llvm::ConstantInt::get(Int16Ty, Uuid.substr(9, 4), 16), | |||
5723 | llvm::ConstantInt::get(Int16Ty, Uuid.substr(14, 4), 16), | |||
5724 | llvm::ConstantArray::get(llvm::ArrayType::get(Int8Ty, 8), Field3) | |||
5725 | }; | |||
5726 | ||||
5727 | return llvm::ConstantStruct::getAnon(Fields); | |||
5728 | } | |||
5729 | ||||
5730 | llvm::Constant *CodeGenModule::GetAddrOfRTTIDescriptor(QualType Ty, | |||
5731 | bool ForEH) { | |||
5732 | // Return a bogus pointer if RTTI is disabled, unless it's for EH. | |||
5733 | // FIXME: should we even be calling this method if RTTI is disabled | |||
5734 | // and it's not for EH? | |||
5735 | if ((!ForEH && !getLangOpts().RTTI) || getLangOpts().CUDAIsDevice) | |||
5736 | return llvm::Constant::getNullValue(Int8PtrTy); | |||
5737 | ||||
5738 | if (ForEH && Ty->isObjCObjectPointerType() && | |||
5739 | LangOpts.ObjCRuntime.isGNUFamily()) | |||
5740 | return ObjCRuntime->GetEHType(Ty); | |||
5741 | ||||
5742 | return getCXXABI().getAddrOfRTTIDescriptor(Ty); | |||
5743 | } | |||
5744 | ||||
5745 | void CodeGenModule::EmitOMPThreadPrivateDecl(const OMPThreadPrivateDecl *D) { | |||
5746 | // Do not emit threadprivates in simd-only mode. | |||
5747 | if (LangOpts.OpenMP && LangOpts.OpenMPSimd) | |||
5748 | return; | |||
5749 | for (auto RefExpr : D->varlists()) { | |||
5750 | auto *VD = cast<VarDecl>(cast<DeclRefExpr>(RefExpr)->getDecl()); | |||
5751 | bool PerformInit = | |||
5752 | VD->getAnyInitializer() && | |||
5753 | !VD->getAnyInitializer()->isConstantInitializer(getContext(), | |||
5754 | /*ForRef=*/false); | |||
5755 | ||||
5756 | Address Addr(GetAddrOfGlobalVar(VD), getContext().getDeclAlign(VD)); | |||
5757 | if (auto InitFunction = getOpenMPRuntime().emitThreadPrivateVarDefinition( | |||
5758 | VD, Addr, RefExpr->getBeginLoc(), PerformInit)) | |||
5759 | CXXGlobalInits.push_back(InitFunction); | |||
5760 | } | |||
5761 | } | |||
5762 | ||||
5763 | llvm::Metadata * | |||
5764 | CodeGenModule::CreateMetadataIdentifierImpl(QualType T, MetadataTypeMap &Map, | |||
5765 | StringRef Suffix) { | |||
5766 | llvm::Metadata *&InternalId = Map[T.getCanonicalType()]; | |||
5767 | if (InternalId) | |||
5768 | return InternalId; | |||
5769 | ||||
5770 | if (isExternallyVisible(T->getLinkage())) { | |||
5771 | std::string OutName; | |||
5772 | llvm::raw_string_ostream Out(OutName); | |||
5773 | getCXXABI().getMangleContext().mangleTypeName(T, Out); | |||
5774 | Out << Suffix; | |||
5775 | ||||
5776 | InternalId = llvm::MDString::get(getLLVMContext(), Out.str()); | |||
5777 | } else { | |||
5778 | InternalId = llvm::MDNode::getDistinct(getLLVMContext(), | |||
5779 | llvm::ArrayRef<llvm::Metadata *>()); | |||
5780 | } | |||
5781 | ||||
5782 | return InternalId; | |||
5783 | } | |||
5784 | ||||
5785 | llvm::Metadata *CodeGenModule::CreateMetadataIdentifierForType(QualType T) { | |||
5786 | return CreateMetadataIdentifierImpl(T, MetadataIdMap, ""); | |||
5787 | } | |||
5788 | ||||
5789 | llvm::Metadata * | |||
5790 | CodeGenModule::CreateMetadataIdentifierForVirtualMemPtrType(QualType T) { | |||
5791 | return CreateMetadataIdentifierImpl(T, VirtualMetadataIdMap, ".virtual"); | |||
5792 | } | |||
5793 | ||||
5794 | // Generalize pointer types to a void pointer with the qualifiers of the | |||
5795 | // originally pointed-to type, e.g. 'const char *' and 'char * const *' | |||
5796 | // generalize to 'const void *' while 'char *' and 'const char **' generalize to | |||
5797 | // 'void *'. | |||
5798 | static QualType GeneralizeType(ASTContext &Ctx, QualType Ty) { | |||
5799 | if (!Ty->isPointerType()) | |||
5800 | return Ty; | |||
5801 | ||||
5802 | return Ctx.getPointerType( | |||
5803 | QualType(Ctx.VoidTy).withCVRQualifiers( | |||
5804 | Ty->getPointeeType().getCVRQualifiers())); | |||
5805 | } | |||
5806 | ||||
5807 | // Apply type generalization to a FunctionType's return and argument types | |||
5808 | static QualType GeneralizeFunctionType(ASTContext &Ctx, QualType Ty) { | |||
5809 | if (auto *FnType = Ty->getAs<FunctionProtoType>()) { | |||
5810 | SmallVector<QualType, 8> GeneralizedParams; | |||
5811 | for (auto &Param : FnType->param_types()) | |||
5812 | GeneralizedParams.push_back(GeneralizeType(Ctx, Param)); | |||
5813 | ||||
5814 | return Ctx.getFunctionType( | |||
5815 | GeneralizeType(Ctx, FnType->getReturnType()), | |||
5816 | GeneralizedParams, FnType->getExtProtoInfo()); | |||
5817 | } | |||
5818 | ||||
5819 | if (auto *FnType = Ty->getAs<FunctionNoProtoType>()) | |||
5820 | return Ctx.getFunctionNoProtoType( | |||
5821 | GeneralizeType(Ctx, FnType->getReturnType())); | |||
5822 | ||||
5823 | llvm_unreachable("Encountered unknown FunctionType")::llvm::llvm_unreachable_internal("Encountered unknown FunctionType" , "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 5823); | |||
5824 | } | |||
5825 | ||||
5826 | llvm::Metadata *CodeGenModule::CreateMetadataIdentifierGeneralized(QualType T) { | |||
5827 | return CreateMetadataIdentifierImpl(GeneralizeFunctionType(getContext(), T), | |||
5828 | GeneralizedMetadataIdMap, ".generalized"); | |||
5829 | } | |||
5830 | ||||
5831 | /// Returns whether this module needs the "all-vtables" type identifier. | |||
5832 | bool CodeGenModule::NeedAllVtablesTypeId() const { | |||
5833 | // Returns true if at least one of vtable-based CFI checkers is enabled and | |||
5834 | // is not in the trapping mode. | |||
5835 | return ((LangOpts.Sanitize.has(SanitizerKind::CFIVCall) && | |||
5836 | !CodeGenOpts.SanitizeTrap.has(SanitizerKind::CFIVCall)) || | |||
5837 | (LangOpts.Sanitize.has(SanitizerKind::CFINVCall) && | |||
5838 | !CodeGenOpts.SanitizeTrap.has(SanitizerKind::CFINVCall)) || | |||
5839 | (LangOpts.Sanitize.has(SanitizerKind::CFIDerivedCast) && | |||
5840 | !CodeGenOpts.SanitizeTrap.has(SanitizerKind::CFIDerivedCast)) || | |||
5841 | (LangOpts.Sanitize.has(SanitizerKind::CFIUnrelatedCast) && | |||
5842 | !CodeGenOpts.SanitizeTrap.has(SanitizerKind::CFIUnrelatedCast))); | |||
5843 | } | |||
5844 | ||||
5845 | void CodeGenModule::AddVTableTypeMetadata(llvm::GlobalVariable *VTable, | |||
5846 | CharUnits Offset, | |||
5847 | const CXXRecordDecl *RD) { | |||
5848 | llvm::Metadata *MD = | |||
5849 | CreateMetadataIdentifierForType(QualType(RD->getTypeForDecl(), 0)); | |||
5850 | VTable->addTypeMetadata(Offset.getQuantity(), MD); | |||
5851 | ||||
5852 | if (CodeGenOpts.SanitizeCfiCrossDso) | |||
5853 | if (auto CrossDsoTypeId = CreateCrossDsoCfiTypeId(MD)) | |||
5854 | VTable->addTypeMetadata(Offset.getQuantity(), | |||
5855 | llvm::ConstantAsMetadata::get(CrossDsoTypeId)); | |||
5856 | ||||
5857 | if (NeedAllVtablesTypeId()) { | |||
5858 | llvm::Metadata *MD = llvm::MDString::get(getLLVMContext(), "all-vtables"); | |||
5859 | VTable->addTypeMetadata(Offset.getQuantity(), MD); | |||
5860 | } | |||
5861 | } | |||
5862 | ||||
5863 | TargetAttr::ParsedTargetAttr CodeGenModule::filterFunctionTargetAttrs(const TargetAttr *TD) { | |||
5864 | assert(TD != nullptr)((TD != nullptr) ? static_cast<void> (0) : __assert_fail ("TD != nullptr", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/CodeGen/CodeGenModule.cpp" , 5864, __PRETTY_FUNCTION__)); | |||
5865 | TargetAttr::ParsedTargetAttr ParsedAttr = TD->parse(); | |||
5866 | ||||
5867 | ParsedAttr.Features.erase( | |||
5868 | llvm::remove_if(ParsedAttr.Features, | |||
5869 | [&](const std::string &Feat) { | |||
5870 | return !Target.isValidFeatureName( | |||
5871 | StringRef{Feat}.substr(1)); | |||
5872 | }), | |||
5873 | ParsedAttr.Features.end()); | |||
5874 | return ParsedAttr; | |||
5875 | } | |||
5876 | ||||
5877 | ||||
5878 | // Fills in the supplied string map with the set of target features for the | |||
5879 | // passed in function. | |||
5880 | void CodeGenModule::getFunctionFeatureMap(llvm::StringMap<bool> &FeatureMap, | |||
5881 | GlobalDecl GD) { | |||
5882 | StringRef TargetCPU = Target.getTargetOpts().CPU; | |||
5883 | const FunctionDecl *FD = GD.getDecl()->getAsFunction(); | |||
5884 | if (const auto *TD = FD->getAttr<TargetAttr>()) { | |||
5885 | TargetAttr::ParsedTargetAttr ParsedAttr = filterFunctionTargetAttrs(TD); | |||
5886 | ||||
5887 | // Make a copy of the features as passed on the command line into the | |||
5888 | // beginning of the additional features from the function to override. | |||
5889 | ParsedAttr.Features.insert(ParsedAttr.Features.begin(), | |||
5890 | Target.getTargetOpts().FeaturesAsWritten.begin(), | |||
5891 | Target.getTargetOpts().FeaturesAsWritten.end()); | |||
5892 | ||||
5893 | if (ParsedAttr.Architecture != "" && | |||
5894 | Target.isValidCPUName(ParsedAttr.Architecture)) | |||
5895 | TargetCPU = ParsedAttr.Architecture; | |||
5896 | ||||
5897 | // Now populate the feature map, first with the TargetCPU which is either | |||
5898 | // the default or a new one from the target attribute string. Then we'll use | |||
5899 | // the passed in features (FeaturesAsWritten) along with the new ones from | |||
5900 | // the attribute. | |||
5901 | Target.initFeatureMap(FeatureMap, getDiags(), TargetCPU, | |||
5902 | ParsedAttr.Features); | |||
5903 | } else if (const auto *SD = FD->getAttr<CPUSpecificAttr>()) { | |||
5904 | llvm::SmallVector<StringRef, 32> FeaturesTmp; | |||
5905 | Target.getCPUSpecificCPUDispatchFeatures( | |||
5906 | SD->getCPUName(GD.getMultiVersionIndex())->getName(), FeaturesTmp); | |||
5907 | std::vector<std::string> Features(FeaturesTmp.begin(), FeaturesTmp.end()); | |||
5908 | Target.initFeatureMap(FeatureMap, getDiags(), TargetCPU, Features); | |||
5909 | } else { | |||
5910 | Target.initFeatureMap(FeatureMap, getDiags(), TargetCPU, | |||
5911 | Target.getTargetOpts().Features); | |||
5912 | } | |||
5913 | } | |||
5914 | ||||
5915 | llvm::SanitizerStatReport &CodeGenModule::getSanStats() { | |||
5916 | if (!SanStats) | |||
5917 | SanStats = std::make_unique<llvm::SanitizerStatReport>(&getModule()); | |||
5918 | ||||
5919 | return *SanStats; | |||
5920 | } | |||
5921 | llvm::Value * | |||
5922 | CodeGenModule::createOpenCLIntToSamplerConversion(const Expr *E, | |||
5923 | CodeGenFunction &CGF) { | |||
5924 | llvm::Constant *C = ConstantE |